4560190517422247a223d1fc25b0c6dd2b2b9e17
[linux-2.6.git] / drivers / char / cyclades.c
1 #undef  BLOCKMOVE
2 #define Z_WAKE
3 #undef  Z_EXT_CHARS_IN_BUFFER
4
5 /*
6  *  linux/drivers/char/cyclades.c
7  *
8  * This file contains the driver for the Cyclades async multiport
9  * serial boards.
10  *
11  * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12  * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13  *
14  * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
15  *
16  * Much of the design and some of the code came from serial.c
17  * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
18  * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19  * and then fixed as suggested by Michael K. Johnson 12/12/92.
20  * Converted to pci probing and cleaned up by Jiri Slaby.
21  *
22  * This version supports shared IRQ's (only for PCI boards).
23  *
24  * Prevent users from opening non-existing Z ports.
25  *
26  * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
27  * Fixed the PCI detection function to work properly on Alpha systems.
28  * Implemented support for TIOCSERGETLSR ioctl.
29  * Implemented full support for non-standard baud rates.
30  *
31  * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
32  * Request PLX I/O region, although driver doesn't use it, to avoid
33  * problems with other drivers accessing it.
34  * Removed count for on-board buffer characters in cy_chars_in_buffer
35  * (Cyclades-Z only).
36  *
37  * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
38  * Driver now reports physical instead of virtual memory addresses.
39  * Masks were added to some Cyclades-Z read accesses.
40  * Implemented workaround for PLX9050 bug that would cause a system lockup
41  * in certain systems, depending on the MMIO addresses allocated to the
42  * board.
43  * Changed the Tx interrupt programming in the CD1400 chips to boost up
44  * performance (Cyclom-Y only).
45  * Code is now compliant with the new module interface (module_[init|exit]).
46  * Make use of the PCI helper functions to access PCI resources.
47  * Did some code "housekeeping".
48  *
49  * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
50  * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
51  *
52  * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
53  * Fixed SMP locking in Cyclom-Y interrupt handler.
54  *
55  * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
56  * Added a new cyclades_card field called nports to allow the driver to
57  * know the exact number of ports found by the Z firmware after its load;
58  * RX buffer contention prevention logic on interrupt op mode revisited
59  * (Cyclades-Z only);
60  * Revisited printk's for Z debug;
61  * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
62  *
63  * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
64  * Fixed bug in cyz_poll that would make all ports but port 0
65  * unable to transmit/receive data (Cyclades-Z only);
66  * Implemented logic to prevent the RX buffer from being stuck with data
67  * due to a driver / firmware race condition in interrupt op mode
68  * (Cyclades-Z only);
69  * Fixed bug in block_til_ready logic that would lead to a system crash;
70  * Revisited cy_close spinlock usage;
71  *
72  * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
73  * Revisited CONFIG_PCI conditional compilation for PCI board support;
74  * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75  * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76  * Removed CTS handling from the driver -- this is now completely handled
77  * by the firmware (Cyclades-Z only);
78  * Flush RX on-board buffers on a port open (Cyclades-Z only);
79  * Fixed handling of ASYNC_SPD_* TTY flags;
80  * Module unload now unmaps all memory area allocated by ioremap;
81  *
82  * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
83  * Removed CY_PROC conditional compilation;
84  * Implemented SMP-awareness for the driver;
85  * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
86  * functions;
87  * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88  * (irq=NN) as parameters (only for ISA boards);
89  * Fixed bug in set_line_char that would prevent the Cyclades-Z
90  * ports from being configured at speeds above 115.2Kbps;
91  * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92  * switching from working properly;
93  * The driver now only prints IRQ info for the Cyclades-Z if it's
94  * configured to work in interrupt mode;
95  *
96  * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
97  * Added support for interrupt mode operation for the Z cards;
98  * Removed the driver inactivity control for the Z;
99  * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
100  * the Z firmware is not loaded yet;
101  * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
102  * same functionality;
103  * Implemented workaround for IRQ setting loss on the PCI configuration
104  * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
105  *
106  * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
107  * /proc entry location changed to /proc/tty/driver/cyclades;
108  * Added support to shared IRQ's (only for PCI boards);
109  * Added support for Cobalt Qube2 systems;
110  * IRQ [de]allocation scheme revisited;
111  * BREAK implementation changed in order to make use of the 'break_ctl'
112  * TTY facility;
113  * Fixed typo in TTY structure field 'driver_name';
114  * Included a PCI bridge reset and EEPROM reload in the board
115  * initialization code (for both Y and Z series).
116  *
117  * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
118  * Fixed a bug in cy_wait_until_sent that was preventing the port to be
119  * closed properly after a SIGINT;
120  * Module usage counter scheme revisited;
121  * Added support to the upcoming Y PCI boards (i.e., support to additional
122  * PCI Device ID's).
123  *
124  * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125  * Removed all unnecessary page-alignement operations in ioremap calls
126  * (ioremap is currently safe for these operations).
127  *
128  * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
129  * Changed access to PLX PCI bridge registers from I/O to MMIO, in
130  * order to make PLX9050-based boards work with certain motherboards.
131  *
132  * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
133  * cy_close function now resets (correctly) the tty->closing flag;
134  * JIFFIES_DIFF macro fixed.
135  *
136  * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
137  * Fixed bug in cy_close function, which was not informing HW of
138  * which port should have the reception disabled before doing so;
139  * fixed Cyclom-8YoP hardware detection bug.
140  *
141  * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
142  * Fixed bug in cy_close function, which causes malfunction
143  * of one of the first 4 ports when a higher port is closed
144  * (Cyclom-Y only).
145  *
146  * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
147  * Fixed Cyclom-4Yo hardware detection bug.
148  *
149  * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
150  * /proc/cyclades implementation with great collaboration of
151  * Marc Lewis <marc@blarg.net>;
152  * cyy_interrupt was changed to avoid occurrence of kernel oopses
153  * during PPP operation.
154  *
155  * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
156  * General code review in order to comply with 2.1 kernel standards;
157  * data loss prevention for slow devices revisited (cy_wait_until_sent
158  * was created);
159  * removed conditional compilation for new/old PCI structure support
160  * (now the driver only supports the new PCI structure).
161  *
162  * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
163  * added conditional compilation for new/old PCI structure support;
164  * removed kernel series (2.0.x / 2.1.x) conditional compilation.
165  *
166  * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
167  * cleaned up the data loss fix;
168  * fixed XON/XOFF handling once more (Cyclades-Z);
169  * general review of the driver routines;
170  * introduction of a mechanism to prevent data loss with slow
171  * printers, by forcing a delay before closing the port.
172  *
173  * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
174  * fixed detection/handling of new CD1400 in Ye boards;
175  * fixed XON/XOFF handling (Cyclades-Z);
176  * fixed data loss caused by a premature port close;
177  * introduction of a flag that holds the CD1400 version ID per port
178  * (used by the CYGETCD1400VER new ioctl).
179  *
180  * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
181  * Code review for the module cleanup routine;
182  * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183  * includes anonymous changes regarding signal_pending.
184  *
185  * Revision 2.1  1997/11/01 17:42:41 ivan
186  * Changes in the driver to support Alpha systems (except 8Zo V_1);
187  * BREAK fix for the Cyclades-Z boards;
188  * driver inactivity control by FW implemented;
189  * introduction of flag that allows driver to take advantage of
190  * a special CD1400 feature related to HW flow control;
191  * added support for the CD1400  rev. J (Cyclom-Y boards);
192  * introduction of ioctls to:
193  *  - control the rtsdtr_inv flag (Cyclom-Y);
194  *  - control the rflow flag (Cyclom-Y);
195  *  - adjust the polling interval (Cyclades-Z);
196  *
197  * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
198  * Fixes related to kernel version conditional
199  * compilation.
200  *
201  * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
202  * Compatibility issues between kernels 2.0.x and
203  * 2.1.x (mainly related to clear_bit function).
204  *
205  * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
206  * Changes to define the memory window according to the
207  * board type.
208  *
209  * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
210  * Changes to support new cycladesZ boards.
211  *
212  * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
213  * Merge of Bentson's and Daniel's version 1.36.4.28.
214  * Corrects bug in cy_detect_pci: check if there are more
215  * ports than the number of static structs allocated.
216  * Warning message during initialization if this driver is
217  * used with the new generation of cycladesZ boards.  Those
218  * will be supported only in next release of the driver.
219  * Corrects bug in cy_detect_pci and cy_detect_isa that
220  * returned wrong number of VALID boards, when a cyclomY
221  * was found with no serial modules connected.
222  * Changes to use current (2.1.x) kernel subroutine names
223  * and created macros for compilation with 2.0.x kernel,
224  * instead of the other way around.
225  *
226  * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
227  * Change queue_task_irq_off to queue_task_irq.
228  * The inline function queue_task_irq_off (tqueue.h)
229  * was removed from latest releases of 2.1.x kernel.
230  * Use of macro __init to mark the initialization
231  * routines, so memory can be reused.
232  * Also incorporate implementation of critical region
233  * in function cleanup_module() created by anonymous
234  * linuxer.
235  *
236  * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
237  * Change to support new firmware that solves DCD problem:
238  * application could fail to receive SIGHUP signal when DCD
239  * varying too fast.
240  *
241  * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
242  * Changed for support linux versions 2.1.X.
243  * Backward compatible with linux versions 2.0.X.
244  * Corrected illegal use of filler field in
245  * CH_CTRL struct.
246  * Deleted some debug messages.
247  *
248  * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
249  * Included check for NULL tty pointer in cyz_poll.
250  *
251  * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
252  * Bill Foster at Blarg! Online services noticed that
253  * some of the switch elements of -Z modem control
254  * lacked a closing "break;"
255  *
256  * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
257  * Changed low water threshold for buffer xmit_buf
258  *
259  * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
260  * Marcio provided fix to modem status fetch for -Z
261  *
262  * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
263  * improve mapping of -Z control page (thanks to Steve
264  * Price <stevep@fa.tdktca.com> for help on this)
265  *
266  * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
267  * shift from CPU-bound to memcopy in cyz_polling operation
268  *
269  * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
270  * Added support to set and report higher speeds.
271  *
272  * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
273  * Some fixes in the HW flow control for the BETA release.
274  * Don't try to register the IRQ.
275  *
276  * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
277  * make sure "cyc" appears in all kernel messages; all soft interrupts
278  * handled by same routine; recognize out-of-band reception; comment
279  * out some diagnostic messages; leave RTS/CTS flow control to hardware;
280  * fix race condition in -Z buffer management; only -Y needs to explicitly
281  * flush chars; tidy up some startup messages;
282  *
283  * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
284  * shift MOD_INC_USE_COUNT location to match
285  * serial.c; purge some diagnostic messages;
286  *
287  * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
288  * enable modem status messages and fetch & process them; note
289  * time of last activity type for each port; set_line_char now
290  * supports more than line 0 and treats 0 baud correctly;
291  * get_modem_info senses rs_status;
292  *
293  * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
294  * barely works--now's time to turn on
295  * more features 'til it breaks
296  *
297  * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
298  * check more -Z board status; shorten boot message
299  *
300  * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
301  * fix reference to ch_ctrl in startup; verify return
302  * values from cyz_issue_cmd and cyz_update_channel;
303  * more stuff to get modem control correct;
304  *
305  * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
306  * more -Z stuff folded in; re-order changes to put -Z stuff
307  * after -Y stuff (to make changes clearer)
308  *
309  * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
310  * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
311  * Add code to send break.  Clear firmware ID word at startup (so
312  * that other code won't talk to inactive board).
313  *
314  * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
315  * add code for -Z in set_line_char
316  *
317  * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
318  * fold more -Z stuff (or in some cases, error messages)
319  * into driver; add text to "don't know what to do" messages.
320  *
321  * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
322  * moved compile-time flags near top of file; cosmetic changes
323  * to narrow text (to allow 2-up printing); changed many declarations
324  * to "static" to limit external symbols; shuffled code order to
325  * coalesce -Y and -Z specific code, also to put internal functions
326  * in order of tty_driver structure; added code to recognize -Z
327  * ports (and for moment, do nothing or report error); add cy_startup
328  * to parse boot command line for extra base addresses for ISA probes;
329  *
330  * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
331  * reorder some code, fix types of some vars (int vs. long),
332  * add cy_setup to support user declared ISA addresses
333  *
334  * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
335  * dump ioctl based firmware load (it's now a user level
336  * program); ensure uninitialzed ports cannot be used
337  *
338  * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
339  * rename vars and restructure some code
340  *
341  * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
342  * get right status back after boot load
343  *
344  * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
345  * successfully loads firmware
346  *
347  * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
348  * add more of the code for the boot/load ioctls
349  *
350  * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
351  * start to add Z functionality--starting with ioctl
352  * for loading firmware
353  *
354  * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
355  * added code to recognize Z/PCI card at initialization; report
356  * presence, but card is not initialized (because firmware needs
357  * to be loaded)
358  *
359  * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
360  * starting minor number at zero; added missing verify_area
361  * as noted by Heiko EiƟfeldt <heiko@colossus.escape.de>
362  *
363  * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
364  * remove unneeded boot message & fix CLOCAL hardware flow
365  * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366  * remove unused diagnostic statements; minor 0 is first;
367  *
368  * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
369  * The kernel function vremap (available only in later 1.3.xx kernels)
370  * allows the access to memory addresses above the RAM. This revision
371  * of the driver supports PCI boards below 1Mb (device id 0x100) and
372  * above 1Mb (device id 0x101).
373  *
374  * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
375  * Some global changes to interrupt handling spilled into
376  * this driver--mostly unused arguments in system function
377  * calls.  Also added change by Marcio Saito which should
378  * reduce lost interrupts at startup by fast processors.
379  *
380  * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
381  * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382  * in 1.3.41 kernel to remove a possible race condition, extend
383  * some error messages, and let the driver run as a loadable module
384  * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385  * possible race condition.
386  * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
387  *
388  * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
389  * Changes by Linus Torvalds in 1.3.33 kernel distribution
390  * required due to reordering of driver initialization.
391  * Drivers are now initialized *after* memory management.
392  *
393  * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
394  * remove printk from ISR; fix typo
395  *
396  * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
397  * Minor fixes in the PCI board support. PCI function calls in
398  * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399  * <duncan@okay.com>. "bad serial count" message removed.
400  *
401  * Revision 1.36.3  1995/08/22  09:19:42  marcio
402  * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403  * board initialization. Changes in the boot messages. The driver
404  * supports up to 4 boards and 64 ports by default.
405  *
406  * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
407  * disambiguate between Cyclom-16Y and Cyclom-32Ye;
408  *
409  * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
410  * add missing break in modem control block in ioctl switch statement
411  * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
412  *
413  * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
414  * make sure CTS flow control is set as soon as possible (thanks
415  * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
416  *
417  * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
418  * initialize defaults for receive threshold and stale data timeout;
419  * cosmetic changes;
420  *
421  * Revision 1.36  1995/03/10  23:33:53  bentson
422  * added support of chips 4-7 in 32 port Cyclom-Ye;
423  * fix cy_interrupt pointer dereference problem
424  * (Joe Portman <baron@aa.net>);
425  * give better error response if open is attempted on non-existent port
426  * (Zachariah Vaum <jchryslr@netcom.com>);
427  * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428  * conditional compilation for -16Y on systems with fast, noisy bus;
429  * comment out diagnostic print function;
430  * cleaned up table of base addresses;
431  * set receiver time-out period register to correct value,
432  * set receive threshold to better default values,
433  * set chip timer to more accurate 200 Hz ticking,
434  * add code to monitor and modify receive parameters
435  * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436  * <njs@scifi.emi.net>);
437  *
438  * Revision 1.35  1994/12/16  13:54:18  steffen
439  * additional patch by Marcio Saito for board detection
440  * Accidently left out in 1.34
441  *
442  * Revision 1.34  1994/12/10  12:37:12  steffen
443  * This is the corrected version as suggested by Marcio Saito
444  *
445  * Revision 1.33  1994/12/01  22:41:18  bentson
446  * add hooks to support more high speeds directly; add tytso
447  * patch regarding CLOCAL wakeups
448  *
449  * Revision 1.32  1994/11/23  19:50:04  bentson
450  * allow direct kernel control of higher signalling rates;
451  * look for cards at additional locations
452  *
453  * Revision 1.31  1994/11/16  04:33:28  bentson
454  * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455  * a problem in chars_in_buffer has been resolved by some
456  * small changes;  this should yield smoother output
457  *
458  * Revision 1.30  1994/11/16  04:28:05  bentson
459  * Fix from Corey Minyard, Internet: minyard@metronet.com,
460  * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461  * cy_hangup that appears to clear up much (all?) of the
462  * DTR glitches; also he's added/cleaned-up diagnostic messages
463  *
464  * Revision 1.29  1994/11/16  04:16:07  bentson
465  * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466  * operate higher speeds in same way as other serial ports;
467  * add more serial ports (for up to two 16-port muxes).
468  *
469  * Revision 1.28  1994/11/04  00:13:16  root
470  * turn off diagnostic messages
471  *
472  * Revision 1.27  1994/11/03  23:46:37  root
473  * bunch of changes to bring driver into greater conformance
474  * with the serial.c driver (looking for missed fixes)
475  *
476  * Revision 1.26  1994/11/03  22:40:36  root
477  * automatic interrupt probing fixed.
478  *
479  * Revision 1.25  1994/11/03  20:17:02  root
480  * start to implement auto-irq
481  *
482  * Revision 1.24  1994/11/03  18:01:55  root
483  * still working on modem signals--trying not to drop DTR
484  * during the getty/login processes
485  *
486  * Revision 1.23  1994/11/03  17:51:36  root
487  * extend baud rate support; set receive threshold as function
488  * of baud rate; fix some problems with RTS/CTS;
489  *
490  * Revision 1.22  1994/11/02  18:05:35  root
491  * changed arguments to udelay to type long to get
492  * delays to be of correct duration
493  *
494  * Revision 1.21  1994/11/02  17:37:30  root
495  * employ udelay (after calibrating loops_per_second earlier
496  * in init/main.c) instead of using home-grown delay routines
497  *
498  * Revision 1.20  1994/11/02  03:11:38  root
499  * cy_chars_in_buffer forces a return value of 0 to let
500  * login work (don't know why it does); some functions
501  * that were returning EFAULT, now executes the code;
502  * more work on deciding when to disable xmit interrupts;
503  *
504  * Revision 1.19  1994/11/01  20:10:14  root
505  * define routine to start transmission interrupts (by enabling
506  * transmit interrupts); directly enable/disable modem interrupts;
507  *
508  * Revision 1.18  1994/11/01  18:40:45  bentson
509  * Don't always enable transmit interrupts in startup; interrupt on
510  * TxMpty instead of TxRdy to help characters get out before shutdown;
511  * restructure xmit interrupt to check for chars first and quit if
512  * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
513  * (to my view);
514  *
515  * Revision 1.17  1994/10/30  04:39:45  bentson
516  * rename serial_driver and callout_driver to cy_serial_driver and
517  * cy_callout_driver to avoid linkage interference; initialize
518  * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519  * from cyclades_port structure; add paranoia check to cy_close;
520  *
521  * Revision 1.16  1994/10/30  01:14:33  bentson
522  * change major numbers; add some _early_ return statements;
523  *
524  * Revision 1.15  1994/10/29  06:43:15  bentson
525  * final tidying up for clean compile;  enable some error reporting
526  *
527  * Revision 1.14  1994/10/28  20:30:22  Bentson
528  * lots of changes to drag the driver towards the new tty_io
529  * structures and operation.  not expected to work, but may
530  * compile cleanly.
531  *
532  * Revision 1.13  1994/07/21  23:08:57  Bentson
533  * add some diagnostic cruft; support 24 lines (for testing
534  * both -8Y and -16Y cards; be more thorough in servicing all
535  * chips during interrupt; add "volatile" a few places to
536  * circumvent compiler optimizations; fix base & offset
537  * computations in block_til_ready (was causing chip 0 to
538  * stop operation)
539  *
540  * Revision 1.12  1994/07/19  16:42:11  Bentson
541  * add some hackery for kernel version 1.1.8; expand
542  * error messages; refine timing for delay loops and
543  * declare loop params volatile
544  *
545  * Revision 1.11  1994/06/11  21:53:10  bentson
546  * get use of save_car right in transmit interrupt service
547  *
548  * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
549  * add some diagnostic printing; try to fix save_car stuff
550  *
551  * Revision 1.10  1994/06/11  20:36:08  bentson
552  * clean up compiler warnings
553  *
554  * Revision 1.9  1994/06/11  19:42:46  bentson
555  * added a bunch of code to support modem signalling
556  *
557  * Revision 1.8  1994/06/11  17:57:07  bentson
558  * recognize break & parity error
559  *
560  * Revision 1.7  1994/06/05  05:51:34  bentson
561  * Reorder baud table to be monotonic; add cli to CP; discard
562  * incoming characters and status if the line isn't open; start to
563  * fold code into cy_throttle; start to port get_serial_info,
564  * set_serial_info, get_modem_info, set_modem_info, and send_break
565  * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566  * get flow control characters from tty struct; invalidate ports w/o
567  * hardware;
568  *
569  * Revision 1.6  1994/05/31  18:42:21  bentson
570  * add a loop-breaker in the interrupt service routine;
571  * note when port is initialized so that it can be shut
572  * down under the right conditions; receive works without
573  * any obvious errors
574  *
575  * Revision 1.5  1994/05/30  00:55:02  bentson
576  * transmit works without obvious errors
577  *
578  * Revision 1.4  1994/05/27  18:46:27  bentson
579  * incorporated more code from lib_y.c; can now print short
580  * strings under interrupt control to port zero; seems to
581  * select ports/channels/lines correctly
582  *
583  * Revision 1.3  1994/05/25  22:12:44  bentson
584  * shifting from multi-port on a card to proper multiplexor
585  * data structures;  added skeletons of most routines
586  *
587  * Revision 1.2  1994/05/19  13:21:43  bentson
588  * start to crib from other sources
589  *
590  */
591
592 #define CY_VERSION      "2.5"
593
594 /* If you need to install more boards than NR_CARDS, change the constant
595    in the definition below. No other change is necessary to support up to
596    eight boards. Beyond that you'll have to extend cy_isa_addresses. */
597
598 #define NR_CARDS        4
599
600 /*
601    If the total number of ports is larger than NR_PORTS, change this
602    constant in the definition below. No other change is necessary to
603    support more boards/ports. */
604
605 #define NR_PORTS        256
606
607 #define ZO_V1   0
608 #define ZO_V2   1
609 #define ZE_V1   2
610
611 #define SERIAL_PARANOIA_CHECK
612 #undef  CY_DEBUG_OPEN
613 #undef  CY_DEBUG_THROTTLE
614 #undef  CY_DEBUG_OTHER
615 #undef  CY_DEBUG_IO
616 #undef  CY_DEBUG_COUNT
617 #undef  CY_DEBUG_DTR
618 #undef  CY_DEBUG_WAIT_UNTIL_SENT
619 #undef  CY_DEBUG_INTERRUPTS
620 #undef  CY_16Y_HACK
621 #undef  CY_ENABLE_MONITORING
622 #undef  CY_PCI_DEBUG
623
624 /*
625  * Include section
626  */
627 #include <linux/module.h>
628 #include <linux/errno.h>
629 #include <linux/signal.h>
630 #include <linux/sched.h>
631 #include <linux/timer.h>
632 #include <linux/interrupt.h>
633 #include <linux/tty.h>
634 #include <linux/tty_flip.h>
635 #include <linux/serial.h>
636 #include <linux/major.h>
637 #include <linux/string.h>
638 #include <linux/fcntl.h>
639 #include <linux/ptrace.h>
640 #include <linux/cyclades.h>
641 #include <linux/mm.h>
642 #include <linux/ioport.h>
643 #include <linux/init.h>
644 #include <linux/delay.h>
645 #include <linux/spinlock.h>
646 #include <linux/bitops.h>
647 #include <linux/firmware.h>
648 #include <linux/device.h>
649
650 #include <asm/system.h>
651 #include <linux/io.h>
652 #include <asm/irq.h>
653 #include <linux/uaccess.h>
654
655 #include <linux/kernel.h>
656 #include <linux/pci.h>
657
658 #include <linux/stat.h>
659 #include <linux/proc_fs.h>
660 #include <linux/seq_file.h>
661
662 static void cy_throttle(struct tty_struct *tty);
663 static void cy_send_xchar(struct tty_struct *tty, char ch);
664
665 #ifndef SERIAL_XMIT_SIZE
666 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
667 #endif
668 #define WAKEUP_CHARS            256
669
670 #define STD_COM_FLAGS (0)
671
672 /* firmware stuff */
673 #define ZL_MAX_BLOCKS   16
674 #define DRIVER_VERSION  0x02010203
675 #define RAM_SIZE 0x80000
676
677 enum zblock_type {
678         ZBLOCK_PRG = 0,
679         ZBLOCK_FPGA = 1
680 };
681
682 struct zfile_header {
683         char name[64];
684         char date[32];
685         char aux[32];
686         u32 n_config;
687         u32 config_offset;
688         u32 n_blocks;
689         u32 block_offset;
690         u32 reserved[9];
691 } __attribute__ ((packed));
692
693 struct zfile_config {
694         char name[64];
695         u32 mailbox;
696         u32 function;
697         u32 n_blocks;
698         u32 block_list[ZL_MAX_BLOCKS];
699 } __attribute__ ((packed));
700
701 struct zfile_block {
702         u32 type;
703         u32 file_offset;
704         u32 ram_offset;
705         u32 size;
706 } __attribute__ ((packed));
707
708 static struct tty_driver *cy_serial_driver;
709
710 #ifdef CONFIG_ISA
711 /* This is the address lookup table. The driver will probe for
712    Cyclom-Y/ISA boards at all addresses in here. If you want the
713    driver to probe addresses at a different address, add it to
714    this table.  If the driver is probing some other board and
715    causing problems, remove the offending address from this table.
716 */
717
718 static unsigned int cy_isa_addresses[] = {
719         0xD0000,
720         0xD2000,
721         0xD4000,
722         0xD6000,
723         0xD8000,
724         0xDA000,
725         0xDC000,
726         0xDE000,
727         0, 0, 0, 0, 0, 0, 0, 0
728 };
729
730 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
731
732 #ifdef MODULE
733 static long maddr[NR_CARDS];
734 static int irq[NR_CARDS];
735
736 module_param_array(maddr, long, NULL, 0);
737 module_param_array(irq, int, NULL, 0);
738 #endif
739
740 #endif                          /* CONFIG_ISA */
741
742 /* This is the per-card data structure containing address, irq, number of
743    channels, etc. This driver supports a maximum of NR_CARDS cards.
744 */
745 static struct cyclades_card cy_card[NR_CARDS];
746
747 static int cy_next_channel;     /* next minor available */
748
749 /*
750  * This is used to look up the divisor speeds and the timeouts
751  * We're normally limited to 15 distinct baud rates.  The extra
752  * are accessed via settings in info->port.flags.
753  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
754  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
755  *                                               HI            VHI
756  *     20
757  */
758 static int baud_table[] = {
759         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
760         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
761         230400, 0
762 };
763
764 static char baud_co_25[] = {    /* 25 MHz clock option table */
765         /* value =>    00    01   02    03    04 */
766         /* divide by    8    32   128   512  2048 */
767         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
768         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
769 };
770
771 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
772         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
773         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
774 };
775
776 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
777         /* value =>    00    01   02    03    04 */
778         /* divide by    8    32   128   512  2048 */
779         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
780         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
781         0x00
782 };
783
784 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
785         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
786         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
787         0x21
788 };
789
790 static char baud_cor3[] = {     /* receive threshold */
791         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
792         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
793         0x07
794 };
795
796 /*
797  * The Cyclades driver implements HW flow control as any serial driver.
798  * The cyclades_port structure member rflow and the vector rflow_thr
799  * allows us to take advantage of a special feature in the CD1400 to avoid
800  * data loss even when the system interrupt latency is too high. These flags
801  * are to be used only with very special applications. Setting these flags
802  * requires the use of a special cable (DTR and RTS reversed). In the new
803  * CD1400-based boards (rev. 6.00 or later), there is no need for special
804  * cables.
805  */
806
807 static char rflow_thr[] = {     /* rflow threshold */
808         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
809         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
810         0x0a
811 };
812
813 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
814  *  address order.  This look-up table overcomes that problem.
815  */
816 static int cy_chip_offset[] = { 0x0000,
817         0x0400,
818         0x0800,
819         0x0C00,
820         0x0200,
821         0x0600,
822         0x0A00,
823         0x0E00
824 };
825
826 /* PCI related definitions */
827
828 #ifdef CONFIG_PCI
829 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
830         /* PCI < 1Mb */
831         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
832         /* PCI > 1Mb */
833         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
834         /* 4Y PCI < 1Mb */
835         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
836         /* 4Y PCI > 1Mb */
837         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
838         /* 8Y PCI < 1Mb */
839         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
840         /* 8Y PCI > 1Mb */
841         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
842         /* Z PCI < 1Mb */
843         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
844         /* Z PCI > 1Mb */
845         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
846         { }                     /* end of table */
847 };
848 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
849 #endif
850
851 static void cy_start(struct tty_struct *);
852 static void set_line_char(struct cyclades_port *);
853 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
854 #ifdef CONFIG_ISA
855 static unsigned detect_isa_irq(void __iomem *);
856 #endif                          /* CONFIG_ISA */
857
858 #ifndef CONFIG_CYZ_INTR
859 static void cyz_poll(unsigned long);
860
861 /* The Cyclades-Z polling cycle is defined by this variable */
862 static long cyz_polling_cycle = CZ_DEF_POLL;
863
864 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
865
866 #else                           /* CONFIG_CYZ_INTR */
867 static void cyz_rx_restart(unsigned long);
868 static struct timer_list cyz_rx_full_timer[NR_PORTS];
869 #endif                          /* CONFIG_CYZ_INTR */
870
871 static inline bool cy_is_Z(struct cyclades_card *card)
872 {
873         return card->num_chips == (unsigned int)-1;
874 }
875
876 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
877 {
878         return readl(&ctl_addr->init_ctrl) & (1 << 17);
879 }
880
881 static inline bool cyz_fpga_loaded(struct cyclades_card *card)
882 {
883         return __cyz_fpga_loaded(card->ctl_addr.p9060);
884 }
885
886 static inline bool cyz_is_loaded(struct cyclades_card *card)
887 {
888         struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
889
890         return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
891                         readl(&fw_id->signature) == ZFIRM_ID;
892 }
893
894 static inline int serial_paranoia_check(struct cyclades_port *info,
895                 char *name, const char *routine)
896 {
897 #ifdef SERIAL_PARANOIA_CHECK
898         if (!info) {
899                 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
900                                 "in %s\n", name, routine);
901                 return 1;
902         }
903
904         if (info->magic != CYCLADES_MAGIC) {
905                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
906                                 "struct (%s) in %s\n", name, routine);
907                 return 1;
908         }
909 #endif
910         return 0;
911 }                               /* serial_paranoia_check */
912
913 /***********************************************************/
914 /********* Start of block of Cyclom-Y specific code ********/
915
916 /* This routine waits up to 1000 micro-seconds for the previous
917    command to the Cirrus chip to complete and then issues the
918    new command.  An error is returned if the previous command
919    didn't finish within the time limit.
920
921    This function is only called from inside spinlock-protected code.
922  */
923 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
924 {
925         unsigned int i;
926
927         /* Check to see that the previous command has completed */
928         for (i = 0; i < 100; i++) {
929                 if (readb(base_addr + (CyCCR << index)) == 0)
930                         break;
931                 udelay(10L);
932         }
933         /* if the CCR never cleared, the previous command
934            didn't finish within the "reasonable time" */
935         if (i == 100)
936                 return -1;
937
938         /* Issue the new command */
939         cy_writeb(base_addr + (CyCCR << index), cmd);
940
941         return 0;
942 }                               /* cyy_issue_cmd */
943
944 #ifdef CONFIG_ISA
945 /* ISA interrupt detection code */
946 static unsigned detect_isa_irq(void __iomem *address)
947 {
948         int irq;
949         unsigned long irqs, flags;
950         int save_xir, save_car;
951         int index = 0;          /* IRQ probing is only for ISA */
952
953         /* forget possible initially masked and pending IRQ */
954         irq = probe_irq_off(probe_irq_on());
955
956         /* Clear interrupts on the board first */
957         cy_writeb(address + (Cy_ClrIntr << index), 0);
958         /* Cy_ClrIntr is 0x1800 */
959
960         irqs = probe_irq_on();
961         /* Wait ... */
962         udelay(5000L);
963
964         /* Enable the Tx interrupts on the CD1400 */
965         local_irq_save(flags);
966         cy_writeb(address + (CyCAR << index), 0);
967         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
968
969         cy_writeb(address + (CyCAR << index), 0);
970         cy_writeb(address + (CySRER << index),
971                   readb(address + (CySRER << index)) | CyTxRdy);
972         local_irq_restore(flags);
973
974         /* Wait ... */
975         udelay(5000L);
976
977         /* Check which interrupt is in use */
978         irq = probe_irq_off(irqs);
979
980         /* Clean up */
981         save_xir = (u_char) readb(address + (CyTIR << index));
982         save_car = readb(address + (CyCAR << index));
983         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
984         cy_writeb(address + (CySRER << index),
985                   readb(address + (CySRER << index)) & ~CyTxRdy);
986         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
987         cy_writeb(address + (CyCAR << index), (save_car));
988         cy_writeb(address + (Cy_ClrIntr << index), 0);
989         /* Cy_ClrIntr is 0x1800 */
990
991         return (irq > 0) ? irq : 0;
992 }
993 #endif                          /* CONFIG_ISA */
994
995 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
996                 void __iomem *base_addr)
997 {
998         struct cyclades_port *info;
999         struct tty_struct *tty;
1000         int len, index = cinfo->bus_index;
1001         u8 save_xir, channel, save_car, data, char_count;
1002
1003 #ifdef CY_DEBUG_INTERRUPTS
1004         printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1005 #endif
1006         /* determine the channel & change to that context */
1007         save_xir = readb(base_addr + (CyRIR << index));
1008         channel = save_xir & CyIRChannel;
1009         info = &cinfo->ports[channel + chip * 4];
1010         save_car = readb(base_addr + (CyCAR << index));
1011         cy_writeb(base_addr + (CyCAR << index), save_xir);
1012
1013         /* if there is nowhere to put the data, discard it */
1014         if (info->port.tty == NULL) {
1015                 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1016                                 CyIVRRxEx) {    /* exception */
1017                         data = readb(base_addr + (CyRDSR << index));
1018                 } else {        /* normal character reception */
1019                         char_count = readb(base_addr + (CyRDCR << index));
1020                         while (char_count--)
1021                                 data = readb(base_addr + (CyRDSR << index));
1022                 }
1023                 goto end;
1024         }
1025         /* there is an open port for this data */
1026         tty = info->port.tty;
1027         if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1028                         CyIVRRxEx) {    /* exception */
1029                 data = readb(base_addr + (CyRDSR << index));
1030
1031                 /* For statistics only */
1032                 if (data & CyBREAK)
1033                         info->icount.brk++;
1034                 else if (data & CyFRAME)
1035                         info->icount.frame++;
1036                 else if (data & CyPARITY)
1037                         info->icount.parity++;
1038                 else if (data & CyOVERRUN)
1039                         info->icount.overrun++;
1040
1041                 if (data & info->ignore_status_mask) {
1042                         info->icount.rx++;
1043                         return;
1044                 }
1045                 if (tty_buffer_request_room(tty, 1)) {
1046                         if (data & info->read_status_mask) {
1047                                 if (data & CyBREAK) {
1048                                         tty_insert_flip_char(tty,
1049                                                 readb(base_addr + (CyRDSR <<
1050                                                         index)), TTY_BREAK);
1051                                         info->icount.rx++;
1052                                         if (info->port.flags & ASYNC_SAK)
1053                                                 do_SAK(tty);
1054                                 } else if (data & CyFRAME) {
1055                                         tty_insert_flip_char(tty,
1056                                                 readb(base_addr + (CyRDSR <<
1057                                                         index)), TTY_FRAME);
1058                                         info->icount.rx++;
1059                                         info->idle_stats.frame_errs++;
1060                                 } else if (data & CyPARITY) {
1061                                         /* Pieces of seven... */
1062                                         tty_insert_flip_char(tty,
1063                                                 readb(base_addr + (CyRDSR <<
1064                                                         index)), TTY_PARITY);
1065                                         info->icount.rx++;
1066                                         info->idle_stats.parity_errs++;
1067                                 } else if (data & CyOVERRUN) {
1068                                         tty_insert_flip_char(tty, 0,
1069                                                         TTY_OVERRUN);
1070                                         info->icount.rx++;
1071                                         /* If the flip buffer itself is
1072                                            overflowing, we still lose
1073                                            the next incoming character.
1074                                          */
1075                                         tty_insert_flip_char(tty,
1076                                                 readb(base_addr + (CyRDSR <<
1077                                                         index)), TTY_FRAME);
1078                                         info->icount.rx++;
1079                                         info->idle_stats.overruns++;
1080                                 /* These two conditions may imply */
1081                                 /* a normal read should be done. */
1082                                 /* } else if(data & CyTIMEOUT) { */
1083                                 /* } else if(data & CySPECHAR) { */
1084                                 } else {
1085                                         tty_insert_flip_char(tty, 0,
1086                                                         TTY_NORMAL);
1087                                         info->icount.rx++;
1088                                 }
1089                         } else {
1090                                 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1091                                 info->icount.rx++;
1092                         }
1093                 } else {
1094                         /* there was a software buffer overrun and nothing
1095                          * could be done about it!!! */
1096                         info->icount.buf_overrun++;
1097                         info->idle_stats.overruns++;
1098                 }
1099         } else {        /* normal character reception */
1100                 /* load # chars available from the chip */
1101                 char_count = readb(base_addr + (CyRDCR << index));
1102
1103 #ifdef CY_ENABLE_MONITORING
1104                 ++info->mon.int_count;
1105                 info->mon.char_count += char_count;
1106                 if (char_count > info->mon.char_max)
1107                         info->mon.char_max = char_count;
1108                 info->mon.char_last = char_count;
1109 #endif
1110                 len = tty_buffer_request_room(tty, char_count);
1111                 while (len--) {
1112                         data = readb(base_addr + (CyRDSR << index));
1113                         tty_insert_flip_char(tty, data, TTY_NORMAL);
1114                         info->idle_stats.recv_bytes++;
1115                         info->icount.rx++;
1116 #ifdef CY_16Y_HACK
1117                         udelay(10L);
1118 #endif
1119                 }
1120                 info->idle_stats.recv_idle = jiffies;
1121         }
1122         tty_schedule_flip(tty);
1123 end:
1124         /* end of service */
1125         cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1126         cy_writeb(base_addr + (CyCAR << index), save_car);
1127 }
1128
1129 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1130                 void __iomem *base_addr)
1131 {
1132         struct cyclades_port *info;
1133         int char_count, index = cinfo->bus_index;
1134         u8 save_xir, channel, save_car, outch;
1135
1136         /* Since we only get here when the transmit buffer
1137            is empty, we know we can always stuff a dozen
1138            characters. */
1139 #ifdef CY_DEBUG_INTERRUPTS
1140         printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1141 #endif
1142
1143         /* determine the channel & change to that context */
1144         save_xir = readb(base_addr + (CyTIR << index));
1145         channel = save_xir & CyIRChannel;
1146         save_car = readb(base_addr + (CyCAR << index));
1147         cy_writeb(base_addr + (CyCAR << index), save_xir);
1148
1149         /* validate the port# (as configured and open) */
1150         if (channel + chip * 4 >= cinfo->nports) {
1151                 cy_writeb(base_addr + (CySRER << index),
1152                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1153                 goto end;
1154         }
1155         info = &cinfo->ports[channel + chip * 4];
1156         if (info->port.tty == NULL) {
1157                 cy_writeb(base_addr + (CySRER << index),
1158                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1159                 goto end;
1160         }
1161
1162         /* load the on-chip space for outbound data */
1163         char_count = info->xmit_fifo_size;
1164
1165         if (info->x_char) {     /* send special char */
1166                 outch = info->x_char;
1167                 cy_writeb(base_addr + (CyTDR << index), outch);
1168                 char_count--;
1169                 info->icount.tx++;
1170                 info->x_char = 0;
1171         }
1172
1173         if (info->breakon || info->breakoff) {
1174                 if (info->breakon) {
1175                         cy_writeb(base_addr + (CyTDR << index), 0);
1176                         cy_writeb(base_addr + (CyTDR << index), 0x81);
1177                         info->breakon = 0;
1178                         char_count -= 2;
1179                 }
1180                 if (info->breakoff) {
1181                         cy_writeb(base_addr + (CyTDR << index), 0);
1182                         cy_writeb(base_addr + (CyTDR << index), 0x83);
1183                         info->breakoff = 0;
1184                         char_count -= 2;
1185                 }
1186         }
1187
1188         while (char_count-- > 0) {
1189                 if (!info->xmit_cnt) {
1190                         if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1191                                 cy_writeb(base_addr + (CySRER << index),
1192                                         readb(base_addr + (CySRER << index)) &
1193                                                 ~CyTxMpty);
1194                         } else {
1195                                 cy_writeb(base_addr + (CySRER << index),
1196                                         (readb(base_addr + (CySRER << index)) &
1197                                                 ~CyTxRdy) | CyTxMpty);
1198                         }
1199                         goto done;
1200                 }
1201                 if (info->port.xmit_buf == NULL) {
1202                         cy_writeb(base_addr + (CySRER << index),
1203                                 readb(base_addr + (CySRER << index)) &
1204                                         ~CyTxRdy);
1205                         goto done;
1206                 }
1207                 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
1208                         cy_writeb(base_addr + (CySRER << index),
1209                                 readb(base_addr + (CySRER << index)) &
1210                                         ~CyTxRdy);
1211                         goto done;
1212                 }
1213                 /* Because the Embedded Transmit Commands have been enabled,
1214                  * we must check to see if the escape character, NULL, is being
1215                  * sent. If it is, we must ensure that there is room for it to
1216                  * be doubled in the output stream.  Therefore we no longer
1217                  * advance the pointer when the character is fetched, but
1218                  * rather wait until after the check for a NULL output
1219                  * character. This is necessary because there may not be room
1220                  * for the two chars needed to send a NULL.)
1221                  */
1222                 outch = info->port.xmit_buf[info->xmit_tail];
1223                 if (outch) {
1224                         info->xmit_cnt--;
1225                         info->xmit_tail = (info->xmit_tail + 1) &
1226                                         (SERIAL_XMIT_SIZE - 1);
1227                         cy_writeb(base_addr + (CyTDR << index), outch);
1228                         info->icount.tx++;
1229                 } else {
1230                         if (char_count > 1) {
1231                                 info->xmit_cnt--;
1232                                 info->xmit_tail = (info->xmit_tail + 1) &
1233                                         (SERIAL_XMIT_SIZE - 1);
1234                                 cy_writeb(base_addr + (CyTDR << index), outch);
1235                                 cy_writeb(base_addr + (CyTDR << index), 0);
1236                                 info->icount.tx++;
1237                                 char_count--;
1238                         }
1239                 }
1240         }
1241
1242 done:
1243         tty_wakeup(info->port.tty);
1244 end:
1245         /* end of service */
1246         cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1247         cy_writeb(base_addr + (CyCAR << index), save_car);
1248 }
1249
1250 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1251                 void __iomem *base_addr)
1252 {
1253         struct cyclades_port *info;
1254         int index = cinfo->bus_index;
1255         u8 save_xir, channel, save_car, mdm_change, mdm_status;
1256
1257         /* determine the channel & change to that context */
1258         save_xir = readb(base_addr + (CyMIR << index));
1259         channel = save_xir & CyIRChannel;
1260         info = &cinfo->ports[channel + chip * 4];
1261         save_car = readb(base_addr + (CyCAR << index));
1262         cy_writeb(base_addr + (CyCAR << index), save_xir);
1263
1264         mdm_change = readb(base_addr + (CyMISR << index));
1265         mdm_status = readb(base_addr + (CyMSVR1 << index));
1266
1267         if (!info->port.tty)
1268                 goto end;
1269
1270         if (mdm_change & CyANY_DELTA) {
1271                 /* For statistics only */
1272                 if (mdm_change & CyDCD)
1273                         info->icount.dcd++;
1274                 if (mdm_change & CyCTS)
1275                         info->icount.cts++;
1276                 if (mdm_change & CyDSR)
1277                         info->icount.dsr++;
1278                 if (mdm_change & CyRI)
1279                         info->icount.rng++;
1280
1281                 wake_up_interruptible(&info->delta_msr_wait);
1282         }
1283
1284         if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
1285                 if (!(mdm_status & CyDCD)) {
1286                         tty_hangup(info->port.tty);
1287                         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1288                 }
1289                 wake_up_interruptible(&info->port.open_wait);
1290         }
1291         if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1292                 if (info->port.tty->hw_stopped) {
1293                         if (mdm_status & CyCTS) {
1294                                 /* cy_start isn't used
1295                                    because... !!! */
1296                                 info->port.tty->hw_stopped = 0;
1297                                 cy_writeb(base_addr + (CySRER << index),
1298                                         readb(base_addr + (CySRER << index)) |
1299                                                 CyTxRdy);
1300                                 tty_wakeup(info->port.tty);
1301                         }
1302                 } else {
1303                         if (!(mdm_status & CyCTS)) {
1304                                 /* cy_stop isn't used
1305                                    because ... !!! */
1306                                 info->port.tty->hw_stopped = 1;
1307                                 cy_writeb(base_addr + (CySRER << index),
1308                                         readb(base_addr + (CySRER << index)) &
1309                                                 ~CyTxRdy);
1310                         }
1311                 }
1312         }
1313 /*      if (mdm_change & CyDSR) {
1314         }
1315         if (mdm_change & CyRI) {
1316         }*/
1317 end:
1318         /* end of service */
1319         cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1320         cy_writeb(base_addr + (CyCAR << index), save_car);
1321 }
1322
1323 /* The real interrupt service routine is called
1324    whenever the card wants its hand held--chars
1325    received, out buffer empty, modem change, etc.
1326  */
1327 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1328 {
1329         int status;
1330         struct cyclades_card *cinfo = dev_id;
1331         void __iomem *base_addr, *card_base_addr;
1332         unsigned int chip, too_many, had_work;
1333         int index;
1334
1335         if (unlikely(cinfo == NULL)) {
1336 #ifdef CY_DEBUG_INTERRUPTS
1337                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1338                                 irq);
1339 #endif
1340                 return IRQ_NONE;        /* spurious interrupt */
1341         }
1342
1343         card_base_addr = cinfo->base_addr;
1344         index = cinfo->bus_index;
1345
1346         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1347         if (unlikely(card_base_addr == NULL))
1348                 return IRQ_HANDLED;
1349
1350         /* This loop checks all chips in the card.  Make a note whenever
1351            _any_ chip had some work to do, as this is considered an
1352            indication that there will be more to do.  Only when no chip
1353            has any work does this outermost loop exit.
1354          */
1355         do {
1356                 had_work = 0;
1357                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1358                         base_addr = cinfo->base_addr +
1359                                         (cy_chip_offset[chip] << index);
1360                         too_many = 0;
1361                         while ((status = readb(base_addr +
1362                                                 (CySVRR << index))) != 0x00) {
1363                                 had_work++;
1364                         /* The purpose of the following test is to ensure that
1365                            no chip can monopolize the driver.  This forces the
1366                            chips to be checked in a round-robin fashion (after
1367                            draining each of a bunch (1000) of characters).
1368                          */
1369                                 if (1000 < too_many++)
1370                                         break;
1371                                 spin_lock(&cinfo->card_lock);
1372                                 if (status & CySRReceive) /* rx intr */
1373                                         cyy_chip_rx(cinfo, chip, base_addr);
1374                                 if (status & CySRTransmit) /* tx intr */
1375                                         cyy_chip_tx(cinfo, chip, base_addr);
1376                                 if (status & CySRModem) /* modem intr */
1377                                         cyy_chip_modem(cinfo, chip, base_addr);
1378                                 spin_unlock(&cinfo->card_lock);
1379                         }
1380                 }
1381         } while (had_work);
1382
1383         /* clear interrupts */
1384         spin_lock(&cinfo->card_lock);
1385         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1386         /* Cy_ClrIntr is 0x1800 */
1387         spin_unlock(&cinfo->card_lock);
1388         return IRQ_HANDLED;
1389 }                               /* cyy_interrupt */
1390
1391 /***********************************************************/
1392 /********* End of block of Cyclom-Y specific code **********/
1393 /******** Start of block of Cyclades-Z specific code *******/
1394 /***********************************************************/
1395
1396 static int
1397 cyz_fetch_msg(struct cyclades_card *cinfo,
1398                 __u32 *channel, __u8 *cmd, __u32 *param)
1399 {
1400         struct FIRM_ID __iomem *firm_id;
1401         struct ZFW_CTRL __iomem *zfw_ctrl;
1402         struct BOARD_CTRL __iomem *board_ctrl;
1403         unsigned long loc_doorbell;
1404
1405         firm_id = cinfo->base_addr + ID_ADDRESS;
1406         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1407         board_ctrl = &zfw_ctrl->board_ctrl;
1408
1409         loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
1410         if (loc_doorbell) {
1411                 *cmd = (char)(0xff & loc_doorbell);
1412                 *channel = readl(&board_ctrl->fwcmd_channel);
1413                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1414                 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
1415                 return 1;
1416         }
1417         return 0;
1418 }                               /* cyz_fetch_msg */
1419
1420 static int
1421 cyz_issue_cmd(struct cyclades_card *cinfo,
1422                 __u32 channel, __u8 cmd, __u32 param)
1423 {
1424         struct FIRM_ID __iomem *firm_id;
1425         struct ZFW_CTRL __iomem *zfw_ctrl;
1426         struct BOARD_CTRL __iomem *board_ctrl;
1427         __u32 __iomem *pci_doorbell;
1428         unsigned int index;
1429
1430         firm_id = cinfo->base_addr + ID_ADDRESS;
1431         if (!cyz_is_loaded(cinfo))
1432                 return -1;
1433
1434         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1435         board_ctrl = &zfw_ctrl->board_ctrl;
1436
1437         index = 0;
1438         pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
1439         while ((readl(pci_doorbell) & 0xff) != 0) {
1440                 if (index++ == 1000)
1441                         return (int)(readl(pci_doorbell) & 0xff);
1442                 udelay(50L);
1443         }
1444         cy_writel(&board_ctrl->hcmd_channel, channel);
1445         cy_writel(&board_ctrl->hcmd_param, param);
1446         cy_writel(pci_doorbell, (long)cmd);
1447
1448         return 0;
1449 }                               /* cyz_issue_cmd */
1450
1451 static void cyz_handle_rx(struct cyclades_port *info,
1452                 struct BUF_CTRL __iomem *buf_ctrl)
1453 {
1454         struct cyclades_card *cinfo = info->card;
1455         struct tty_struct *tty = info->port.tty;
1456         unsigned int char_count;
1457         int len;
1458 #ifdef BLOCKMOVE
1459         unsigned char *buf;
1460 #else
1461         char data;
1462 #endif
1463         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1464
1465         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1466         rx_put = readl(&buf_ctrl->rx_put);
1467         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1468         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1469         if (rx_put >= rx_get)
1470                 char_count = rx_put - rx_get;
1471         else
1472                 char_count = rx_put - rx_get + rx_bufsize;
1473
1474         if (char_count) {
1475 #ifdef CY_ENABLE_MONITORING
1476                 info->mon.int_count++;
1477                 info->mon.char_count += char_count;
1478                 if (char_count > info->mon.char_max)
1479                         info->mon.char_max = char_count;
1480                 info->mon.char_last = char_count;
1481 #endif
1482                 if (tty == NULL) {
1483                         /* flush received characters */
1484                         new_rx_get = (new_rx_get + char_count) &
1485                                         (rx_bufsize - 1);
1486                         info->rflush_count++;
1487                 } else {
1488 #ifdef BLOCKMOVE
1489                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1490                    for performance, but because of buffer boundaries, there
1491                    may be several steps to the operation */
1492                         while (1) {
1493                                 len = tty_prepare_flip_string(tty, &buf,
1494                                                 char_count);
1495                                 if (!len)
1496                                         break;
1497
1498                                 len = min_t(unsigned int, min(len, char_count),
1499                                                 rx_bufsize - new_rx_get);
1500
1501                                 memcpy_fromio(buf, cinfo->base_addr +
1502                                                 rx_bufaddr + new_rx_get, len);
1503
1504                                 new_rx_get = (new_rx_get + len) &
1505                                                 (rx_bufsize - 1);
1506                                 char_count -= len;
1507                                 info->icount.rx += len;
1508                                 info->idle_stats.recv_bytes += len;
1509                         }
1510 #else
1511                         len = tty_buffer_request_room(tty, char_count);
1512                         while (len--) {
1513                                 data = readb(cinfo->base_addr + rx_bufaddr +
1514                                                 new_rx_get);
1515                                 new_rx_get = (new_rx_get + 1) &
1516                                                         (rx_bufsize - 1);
1517                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1518                                 info->idle_stats.recv_bytes++;
1519                                 info->icount.rx++;
1520                         }
1521 #endif
1522 #ifdef CONFIG_CYZ_INTR
1523                 /* Recalculate the number of chars in the RX buffer and issue
1524                    a cmd in case it's higher than the RX high water mark */
1525                         rx_put = readl(&buf_ctrl->rx_put);
1526                         if (rx_put >= rx_get)
1527                                 char_count = rx_put - rx_get;
1528                         else
1529                                 char_count = rx_put - rx_get + rx_bufsize;
1530                         if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1531                                         !timer_pending(&cyz_rx_full_timer[
1532                                                         info->line]))
1533                                 mod_timer(&cyz_rx_full_timer[info->line],
1534                                                 jiffies + 1);
1535 #endif
1536                         info->idle_stats.recv_idle = jiffies;
1537                         tty_schedule_flip(tty);
1538                 }
1539                 /* Update rx_get */
1540                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1541         }
1542 }
1543
1544 static void cyz_handle_tx(struct cyclades_port *info,
1545                 struct BUF_CTRL __iomem *buf_ctrl)
1546 {
1547         struct cyclades_card *cinfo = info->card;
1548         struct tty_struct *tty = info->port.tty;
1549         u8 data;
1550         unsigned int char_count;
1551 #ifdef BLOCKMOVE
1552         int small_count;
1553 #endif
1554         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1555
1556         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1557                 return;
1558
1559         tx_get = readl(&buf_ctrl->tx_get);
1560         tx_put = readl(&buf_ctrl->tx_put);
1561         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1562         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1563         if (tx_put >= tx_get)
1564                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1565         else
1566                 char_count = tx_get - tx_put - 1;
1567
1568         if (char_count) {
1569
1570                 if (tty == NULL)
1571                         goto ztxdone;
1572
1573                 if (info->x_char) {     /* send special char */
1574                         data = info->x_char;
1575
1576                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1577                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1578                         info->x_char = 0;
1579                         char_count--;
1580                         info->icount.tx++;
1581                 }
1582 #ifdef BLOCKMOVE
1583                 while (0 < (small_count = min_t(unsigned int,
1584                                 tx_bufsize - tx_put, min_t(unsigned int,
1585                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1586                                         min_t(unsigned int, info->xmit_cnt,
1587                                                 char_count))))) {
1588
1589                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1590                                         tx_put),
1591                                         &info->port.xmit_buf[info->xmit_tail],
1592                                         small_count);
1593
1594                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1595                         char_count -= small_count;
1596                         info->icount.tx += small_count;
1597                         info->xmit_cnt -= small_count;
1598                         info->xmit_tail = (info->xmit_tail + small_count) &
1599                                         (SERIAL_XMIT_SIZE - 1);
1600                 }
1601 #else
1602                 while (info->xmit_cnt && char_count) {
1603                         data = info->port.xmit_buf[info->xmit_tail];
1604                         info->xmit_cnt--;
1605                         info->xmit_tail = (info->xmit_tail + 1) &
1606                                         (SERIAL_XMIT_SIZE - 1);
1607
1608                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1609                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1610                         char_count--;
1611                         info->icount.tx++;
1612                 }
1613 #endif
1614                 tty_wakeup(tty);
1615 ztxdone:
1616                 /* Update tx_put */
1617                 cy_writel(&buf_ctrl->tx_put, tx_put);
1618         }
1619 }
1620
1621 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1622 {
1623         struct tty_struct *tty;
1624         struct cyclades_port *info;
1625         static struct FIRM_ID __iomem *firm_id;
1626         static struct ZFW_CTRL __iomem *zfw_ctrl;
1627         static struct BOARD_CTRL __iomem *board_ctrl;
1628         static struct CH_CTRL __iomem *ch_ctrl;
1629         static struct BUF_CTRL __iomem *buf_ctrl;
1630         __u32 channel, param, fw_ver;
1631         __u8 cmd;
1632         int special_count;
1633         int delta_count;
1634
1635         firm_id = cinfo->base_addr + ID_ADDRESS;
1636         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1637         board_ctrl = &zfw_ctrl->board_ctrl;
1638         fw_ver = readl(&board_ctrl->fw_version);
1639
1640         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1641                 special_count = 0;
1642                 delta_count = 0;
1643                 info = &cinfo->ports[channel];
1644                 tty = info->port.tty;
1645                 if (tty == NULL)
1646                         continue;
1647
1648                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1649                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1650
1651                 switch (cmd) {
1652                 case C_CM_PR_ERROR:
1653                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1654                         info->icount.rx++;
1655                         special_count++;
1656                         break;
1657                 case C_CM_FR_ERROR:
1658                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1659                         info->icount.rx++;
1660                         special_count++;
1661                         break;
1662                 case C_CM_RXBRK:
1663                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1664                         info->icount.rx++;
1665                         special_count++;
1666                         break;
1667                 case C_CM_MDCD:
1668                         info->icount.dcd++;
1669                         delta_count++;
1670                         if (info->port.flags & ASYNC_CHECK_CD) {
1671                                 if ((fw_ver > 241 ? ((u_long) param) :
1672                                                 readl(&ch_ctrl->rs_status)) &
1673                                                 C_RS_DCD) {
1674                                         wake_up_interruptible(&info->port.open_wait);
1675                                 } else {
1676                                         tty_hangup(info->port.tty);
1677                                         wake_up_interruptible(&info->port.open_wait);
1678                                         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1679                                 }
1680                         }
1681                         break;
1682                 case C_CM_MCTS:
1683                         info->icount.cts++;
1684                         delta_count++;
1685                         break;
1686                 case C_CM_MRI:
1687                         info->icount.rng++;
1688                         delta_count++;
1689                         break;
1690                 case C_CM_MDSR:
1691                         info->icount.dsr++;
1692                         delta_count++;
1693                         break;
1694 #ifdef Z_WAKE
1695                 case C_CM_IOCTLW:
1696                         complete(&info->shutdown_wait);
1697                         break;
1698 #endif
1699 #ifdef CONFIG_CYZ_INTR
1700                 case C_CM_RXHIWM:
1701                 case C_CM_RXNNDT:
1702                 case C_CM_INTBACK2:
1703                         /* Reception Interrupt */
1704 #ifdef CY_DEBUG_INTERRUPTS
1705                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1706                                         "port %ld\n", info->card, channel);
1707 #endif
1708                         cyz_handle_rx(info, buf_ctrl);
1709                         break;
1710                 case C_CM_TXBEMPTY:
1711                 case C_CM_TXLOWWM:
1712                 case C_CM_INTBACK:
1713                         /* Transmission Interrupt */
1714 #ifdef CY_DEBUG_INTERRUPTS
1715                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1716                                         "port %ld\n", info->card, channel);
1717 #endif
1718                         cyz_handle_tx(info, buf_ctrl);
1719                         break;
1720 #endif                          /* CONFIG_CYZ_INTR */
1721                 case C_CM_FATAL:
1722                         /* should do something with this !!! */
1723                         break;
1724                 default:
1725                         break;
1726                 }
1727                 if (delta_count)
1728                         wake_up_interruptible(&info->delta_msr_wait);
1729                 if (special_count)
1730                         tty_schedule_flip(tty);
1731         }
1732 }
1733
1734 #ifdef CONFIG_CYZ_INTR
1735 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1736 {
1737         struct cyclades_card *cinfo = dev_id;
1738
1739         if (unlikely(!cyz_is_loaded(cinfo))) {
1740 #ifdef CY_DEBUG_INTERRUPTS
1741                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1742                                 "(IRQ%d).\n", irq);
1743 #endif
1744                 return IRQ_NONE;
1745         }
1746
1747         /* Handle the interrupts */
1748         cyz_handle_cmd(cinfo);
1749
1750         return IRQ_HANDLED;
1751 }                               /* cyz_interrupt */
1752
1753 static void cyz_rx_restart(unsigned long arg)
1754 {
1755         struct cyclades_port *info = (struct cyclades_port *)arg;
1756         struct cyclades_card *card = info->card;
1757         int retval;
1758         __u32 channel = info->line - card->first_line;
1759         unsigned long flags;
1760
1761         spin_lock_irqsave(&card->card_lock, flags);
1762         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1763         if (retval != 0) {
1764                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1765                         info->line, retval);
1766         }
1767         spin_unlock_irqrestore(&card->card_lock, flags);
1768 }
1769
1770 #else                           /* CONFIG_CYZ_INTR */
1771
1772 static void cyz_poll(unsigned long arg)
1773 {
1774         struct cyclades_card *cinfo;
1775         struct cyclades_port *info;
1776         struct tty_struct *tty;
1777         struct FIRM_ID __iomem *firm_id;
1778         struct ZFW_CTRL __iomem *zfw_ctrl;
1779         struct BUF_CTRL __iomem *buf_ctrl;
1780         unsigned long expires = jiffies + HZ;
1781         unsigned int port, card;
1782
1783         for (card = 0; card < NR_CARDS; card++) {
1784                 cinfo = &cy_card[card];
1785
1786                 if (!cy_is_Z(cinfo))
1787                         continue;
1788                 if (!cyz_is_loaded(cinfo))
1789                         continue;
1790
1791                 firm_id = cinfo->base_addr + ID_ADDRESS;
1792                 zfw_ctrl = cinfo->base_addr +
1793                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1794
1795         /* Skip first polling cycle to avoid racing conditions with the FW */
1796                 if (!cinfo->intr_enabled) {
1797                         cinfo->intr_enabled = 1;
1798                         continue;
1799                 }
1800
1801                 cyz_handle_cmd(cinfo);
1802
1803                 for (port = 0; port < cinfo->nports; port++) {
1804                         info = &cinfo->ports[port];
1805                         tty = info->port.tty;
1806                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1807
1808                         if (!info->throttle)
1809                                 cyz_handle_rx(info, buf_ctrl);
1810                         cyz_handle_tx(info, buf_ctrl);
1811                 }
1812                 /* poll every 'cyz_polling_cycle' period */
1813                 expires = jiffies + cyz_polling_cycle;
1814         }
1815         mod_timer(&cyz_timerlist, expires);
1816 }                               /* cyz_poll */
1817
1818 #endif                          /* CONFIG_CYZ_INTR */
1819
1820 /********** End of block of Cyclades-Z specific code *********/
1821 /***********************************************************/
1822
1823 /* This is called whenever a port becomes active;
1824    interrupts are enabled and DTR & RTS are turned on.
1825  */
1826 static int startup(struct cyclades_port *info)
1827 {
1828         struct cyclades_card *card;
1829         unsigned long flags;
1830         int retval = 0;
1831         void __iomem *base_addr;
1832         int chip, channel, index;
1833         unsigned long page;
1834
1835         card = info->card;
1836         channel = info->line - card->first_line;
1837
1838         page = get_zeroed_page(GFP_KERNEL);
1839         if (!page)
1840                 return -ENOMEM;
1841
1842         spin_lock_irqsave(&card->card_lock, flags);
1843
1844         if (info->port.flags & ASYNC_INITIALIZED) {
1845                 free_page(page);
1846                 goto errout;
1847         }
1848
1849         if (!info->type) {
1850                 if (info->port.tty)
1851                         set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1852                 free_page(page);
1853                 goto errout;
1854         }
1855
1856         if (info->port.xmit_buf)
1857                 free_page(page);
1858         else
1859                 info->port.xmit_buf = (unsigned char *)page;
1860
1861         spin_unlock_irqrestore(&card->card_lock, flags);
1862
1863         set_line_char(info);
1864
1865         if (!cy_is_Z(card)) {
1866                 chip = channel >> 2;
1867                 channel &= 0x03;
1868                 index = card->bus_index;
1869                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1870
1871 #ifdef CY_DEBUG_OPEN
1872                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1873                                 "base_addr %p\n",
1874                                 card, chip, channel, base_addr);
1875 #endif
1876                 spin_lock_irqsave(&card->card_lock, flags);
1877
1878                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1879
1880                 cy_writeb(base_addr + (CyRTPR << index),
1881                         (info->default_timeout ? info->default_timeout : 0x02));
1882                 /* 10ms rx timeout */
1883
1884                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1885                                 index);
1886
1887                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1888                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1889                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1890
1891 #ifdef CY_DEBUG_DTR
1892                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1893                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
1894                         readb(base_addr + (CyMSVR1 << index)),
1895                         readb(base_addr + (CyMSVR2 << index)));
1896 #endif
1897
1898                 cy_writeb(base_addr + (CySRER << index),
1899                         readb(base_addr + (CySRER << index)) | CyRxData);
1900                 info->port.flags |= ASYNC_INITIALIZED;
1901
1902                 if (info->port.tty)
1903                         clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1904                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1905                 info->breakon = info->breakoff = 0;
1906                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1907                 info->idle_stats.in_use =
1908                 info->idle_stats.recv_idle =
1909                 info->idle_stats.xmit_idle = jiffies;
1910
1911                 spin_unlock_irqrestore(&card->card_lock, flags);
1912
1913         } else {
1914                 struct FIRM_ID __iomem *firm_id;
1915                 struct ZFW_CTRL __iomem *zfw_ctrl;
1916                 struct BOARD_CTRL __iomem *board_ctrl;
1917                 struct CH_CTRL __iomem *ch_ctrl;
1918
1919                 base_addr = card->base_addr;
1920
1921                 firm_id = base_addr + ID_ADDRESS;
1922                 if (!cyz_is_loaded(card))
1923                         return -ENODEV;
1924
1925                 zfw_ctrl = card->base_addr +
1926                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1927                 board_ctrl = &zfw_ctrl->board_ctrl;
1928                 ch_ctrl = zfw_ctrl->ch_ctrl;
1929
1930 #ifdef CY_DEBUG_OPEN
1931                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1932                         "base_addr %p\n", card, channel, base_addr);
1933 #endif
1934                 spin_lock_irqsave(&card->card_lock, flags);
1935
1936                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1937 #ifdef Z_WAKE
1938 #ifdef CONFIG_CYZ_INTR
1939                 cy_writel(&ch_ctrl[channel].intr_enable,
1940                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1941                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1942 #else
1943                 cy_writel(&ch_ctrl[channel].intr_enable,
1944                           C_IN_IOCTLW | C_IN_MDCD);
1945 #endif                          /* CONFIG_CYZ_INTR */
1946 #else
1947 #ifdef CONFIG_CYZ_INTR
1948                 cy_writel(&ch_ctrl[channel].intr_enable,
1949                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1950                           C_IN_RXNNDT | C_IN_MDCD);
1951 #else
1952                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1953 #endif                          /* CONFIG_CYZ_INTR */
1954 #endif                          /* Z_WAKE */
1955
1956                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1957                 if (retval != 0) {
1958                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1959                                 "%x\n", info->line, retval);
1960                 }
1961
1962                 /* Flush RX buffers before raising DTR and RTS */
1963                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1964                 if (retval != 0) {
1965                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1966                                 "%x\n", info->line, retval);
1967                 }
1968
1969                 /* set timeout !!! */
1970                 /* set RTS and DTR !!! */
1971                 cy_writel(&ch_ctrl[channel].rs_control,
1972                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1973                         C_RS_DTR);
1974                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1975                 if (retval != 0) {
1976                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1977                                 "%x\n", info->line, retval);
1978                 }
1979 #ifdef CY_DEBUG_DTR
1980                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1981 #endif
1982
1983                 /* enable send, recv, modem !!! */
1984
1985                 info->port.flags |= ASYNC_INITIALIZED;
1986                 if (info->port.tty)
1987                         clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1988                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1989                 info->breakon = info->breakoff = 0;
1990                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1991                 info->idle_stats.in_use =
1992                 info->idle_stats.recv_idle =
1993                 info->idle_stats.xmit_idle = jiffies;
1994
1995                 spin_unlock_irqrestore(&card->card_lock, flags);
1996         }
1997
1998 #ifdef CY_DEBUG_OPEN
1999         printk(KERN_DEBUG "cyc startup done\n");
2000 #endif
2001         return 0;
2002
2003 errout:
2004         spin_unlock_irqrestore(&card->card_lock, flags);
2005         return retval;
2006 }                               /* startup */
2007
2008 static void start_xmit(struct cyclades_port *info)
2009 {
2010         struct cyclades_card *card;
2011         unsigned long flags;
2012         void __iomem *base_addr;
2013         int chip, channel, index;
2014
2015         card = info->card;
2016         channel = info->line - card->first_line;
2017         if (!cy_is_Z(card)) {
2018                 chip = channel >> 2;
2019                 channel &= 0x03;
2020                 index = card->bus_index;
2021                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2022
2023                 spin_lock_irqsave(&card->card_lock, flags);
2024                 cy_writeb(base_addr + (CyCAR << index), channel);
2025                 cy_writeb(base_addr + (CySRER << index),
2026                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2027                 spin_unlock_irqrestore(&card->card_lock, flags);
2028         } else {
2029 #ifdef CONFIG_CYZ_INTR
2030                 int retval;
2031
2032                 spin_lock_irqsave(&card->card_lock, flags);
2033                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2034                 if (retval != 0) {
2035                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2036                                 "%x\n", info->line, retval);
2037                 }
2038                 spin_unlock_irqrestore(&card->card_lock, flags);
2039 #else                           /* CONFIG_CYZ_INTR */
2040                 /* Don't have to do anything at this time */
2041 #endif                          /* CONFIG_CYZ_INTR */
2042         }
2043 }                               /* start_xmit */
2044
2045 /*
2046  * This routine shuts down a serial port; interrupts are disabled,
2047  * and DTR is dropped if the hangup on close termio flag is on.
2048  */
2049 static void shutdown(struct cyclades_port *info)
2050 {
2051         struct cyclades_card *card;
2052         unsigned long flags;
2053         void __iomem *base_addr;
2054         int chip, channel, index;
2055
2056         if (!(info->port.flags & ASYNC_INITIALIZED))
2057                 return;
2058
2059         card = info->card;
2060         channel = info->line - card->first_line;
2061         if (!cy_is_Z(card)) {
2062                 chip = channel >> 2;
2063                 channel &= 0x03;
2064                 index = card->bus_index;
2065                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2066
2067 #ifdef CY_DEBUG_OPEN
2068                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2069                                 "channel %d, base_addr %p\n",
2070                                 card, chip, channel, base_addr);
2071 #endif
2072
2073                 spin_lock_irqsave(&card->card_lock, flags);
2074
2075                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2076                 wake_up_interruptible(&info->delta_msr_wait);
2077
2078                 if (info->port.xmit_buf) {
2079                         unsigned char *temp;
2080                         temp = info->port.xmit_buf;
2081                         info->port.xmit_buf = NULL;
2082                         free_page((unsigned long)temp);
2083                 }
2084                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2085                 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2086                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2087                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2088 #ifdef CY_DEBUG_DTR
2089                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2090                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2091                                 readb(base_addr + (CyMSVR1 << index)),
2092                                 readb(base_addr + (CyMSVR2 << index)));
2093 #endif
2094                 }
2095                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2096                 /* it may be appropriate to clear _XMIT at
2097                    some later date (after testing)!!! */
2098
2099                 if (info->port.tty)
2100                         set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2101                 info->port.flags &= ~ASYNC_INITIALIZED;
2102                 spin_unlock_irqrestore(&card->card_lock, flags);
2103         } else {
2104                 struct FIRM_ID __iomem *firm_id;
2105                 struct ZFW_CTRL __iomem *zfw_ctrl;
2106                 struct BOARD_CTRL __iomem *board_ctrl;
2107                 struct CH_CTRL __iomem *ch_ctrl;
2108                 int retval;
2109
2110                 base_addr = card->base_addr;
2111 #ifdef CY_DEBUG_OPEN
2112                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2113                         "base_addr %p\n", card, channel, base_addr);
2114 #endif
2115
2116                 firm_id = base_addr + ID_ADDRESS;
2117                 if (!cyz_is_loaded(card))
2118                         return;
2119
2120                 zfw_ctrl = card->base_addr +
2121                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2122                 board_ctrl = &zfw_ctrl->board_ctrl;
2123                 ch_ctrl = zfw_ctrl->ch_ctrl;
2124
2125                 spin_lock_irqsave(&card->card_lock, flags);
2126
2127                 if (info->port.xmit_buf) {
2128                         unsigned char *temp;
2129                         temp = info->port.xmit_buf;
2130                         info->port.xmit_buf = NULL;
2131                         free_page((unsigned long)temp);
2132                 }
2133
2134                 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
2135                         cy_writel(&ch_ctrl[channel].rs_control,
2136                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2137                                         ~(C_RS_RTS | C_RS_DTR)));
2138                         retval = cyz_issue_cmd(info->card, channel,
2139                                         C_CM_IOCTLM, 0L);
2140                         if (retval != 0) {
2141                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2142                                         "was %x\n", info->line, retval);
2143                         }
2144 #ifdef CY_DEBUG_DTR
2145                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2146 #endif
2147                 }
2148
2149                 if (info->port.tty)
2150                         set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2151                 info->port.flags &= ~ASYNC_INITIALIZED;
2152
2153                 spin_unlock_irqrestore(&card->card_lock, flags);
2154         }
2155
2156 #ifdef CY_DEBUG_OPEN
2157         printk(KERN_DEBUG "cyc shutdown done\n");
2158 #endif
2159 }                               /* shutdown */
2160
2161 /*
2162  * ------------------------------------------------------------
2163  * cy_open() and friends
2164  * ------------------------------------------------------------
2165  */
2166
2167 static int
2168 block_til_ready(struct tty_struct *tty, struct file *filp,
2169                 struct cyclades_port *info)
2170 {
2171         DECLARE_WAITQUEUE(wait, current);
2172         struct cyclades_card *cinfo;
2173         unsigned long flags;
2174         int chip, channel, index;
2175         int retval;
2176         void __iomem *base_addr;
2177
2178         cinfo = info->card;
2179         channel = info->line - cinfo->first_line;
2180
2181         /*
2182          * If the device is in the middle of being closed, then block
2183          * until it's done, and then try again.
2184          */
2185         if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2186                 wait_event_interruptible(info->port.close_wait,
2187                                 !(info->port.flags & ASYNC_CLOSING));
2188                 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2189         }
2190
2191         /*
2192          * If non-blocking mode is set, then make the check up front
2193          * and then exit.
2194          */
2195         if ((filp->f_flags & O_NONBLOCK) ||
2196                                         (tty->flags & (1 << TTY_IO_ERROR))) {
2197                 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2198                 return 0;
2199         }
2200
2201         /*
2202          * Block waiting for the carrier detect and the line to become
2203          * free (i.e., not in use by the callout).  While we are in
2204          * this loop, info->port.count is dropped by one, so that
2205          * cy_close() knows when to free things.  We restore it upon
2206          * exit, either normal or abnormal.
2207          */
2208         retval = 0;
2209         add_wait_queue(&info->port.open_wait, &wait);
2210 #ifdef CY_DEBUG_OPEN
2211         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2212                 "count = %d\n", info->line, info->port.count);
2213 #endif
2214         spin_lock_irqsave(&cinfo->card_lock, flags);
2215         if (!tty_hung_up_p(filp))
2216                 info->port.count--;
2217         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2218 #ifdef CY_DEBUG_COUNT
2219         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2220                 "%d\n", current->pid, info->port.count);
2221 #endif
2222         info->port.blocked_open++;
2223
2224         if (!cy_is_Z(cinfo)) {
2225                 chip = channel >> 2;
2226                 channel &= 0x03;
2227                 index = cinfo->bus_index;
2228                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2229
2230                 while (1) {
2231                         spin_lock_irqsave(&cinfo->card_lock, flags);
2232                         if ((tty->termios->c_cflag & CBAUD)) {
2233                                 cy_writeb(base_addr + (CyCAR << index),
2234                                           (u_char) channel);
2235                                 cy_writeb(base_addr + (CyMSVR1 << index),
2236                                           CyRTS);
2237                                 cy_writeb(base_addr + (CyMSVR2 << index),
2238                                           CyDTR);
2239 #ifdef CY_DEBUG_DTR
2240                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2241                                         "DTR\n");
2242                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2243                                         readb(base_addr + (CyMSVR1 << index)),
2244                                         readb(base_addr + (CyMSVR2 << index)));
2245 #endif
2246                         }
2247                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2248
2249                         set_current_state(TASK_INTERRUPTIBLE);
2250                         if (tty_hung_up_p(filp) ||
2251                                         !(info->port.flags & ASYNC_INITIALIZED)) {
2252                                 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2253                                           -EAGAIN : -ERESTARTSYS);
2254                                 break;
2255                         }
2256
2257                         spin_lock_irqsave(&cinfo->card_lock, flags);
2258                         cy_writeb(base_addr + (CyCAR << index),
2259                                   (u_char) channel);
2260                         if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2261                                         (readb(base_addr +
2262                                                 (CyMSVR1 << index)) & CyDCD))) {
2263                                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2264                                 break;
2265                         }
2266                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2267
2268                         if (signal_pending(current)) {
2269                                 retval = -ERESTARTSYS;
2270                                 break;
2271                         }
2272 #ifdef CY_DEBUG_OPEN
2273                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2274                                 "ttyC%d, count = %d\n",
2275                                 info->line, info->port.count);
2276 #endif
2277                         schedule();
2278                 }
2279         } else {
2280                 struct FIRM_ID __iomem *firm_id;
2281                 struct ZFW_CTRL __iomem *zfw_ctrl;
2282                 struct BOARD_CTRL __iomem *board_ctrl;
2283                 struct CH_CTRL __iomem *ch_ctrl;
2284
2285                 base_addr = cinfo->base_addr;
2286                 firm_id = base_addr + ID_ADDRESS;
2287                 if (!cyz_is_loaded(cinfo)) {
2288                         __set_current_state(TASK_RUNNING);
2289                         remove_wait_queue(&info->port.open_wait, &wait);
2290                         return -EINVAL;
2291                 }
2292
2293                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2294                                                                 & 0xfffff);
2295                 board_ctrl = &zfw_ctrl->board_ctrl;
2296                 ch_ctrl = zfw_ctrl->ch_ctrl;
2297
2298                 while (1) {
2299                         if ((tty->termios->c_cflag & CBAUD)) {
2300                                 cy_writel(&ch_ctrl[channel].rs_control,
2301                                         readl(&ch_ctrl[channel].rs_control) |
2302                                         C_RS_RTS | C_RS_DTR);
2303                                 retval = cyz_issue_cmd(cinfo,
2304                                         channel, C_CM_IOCTLM, 0L);
2305                                 if (retval != 0) {
2306                                         printk(KERN_ERR "cyc:block_til_ready "
2307                                                 "retval on ttyC%d was %x\n",
2308                                                 info->line, retval);
2309                                 }
2310 #ifdef CY_DEBUG_DTR
2311                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2312                                         "Z DTR\n");
2313 #endif
2314                         }
2315
2316                         set_current_state(TASK_INTERRUPTIBLE);
2317                         if (tty_hung_up_p(filp) ||
2318                                         !(info->port.flags & ASYNC_INITIALIZED)) {
2319                                 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2320                                           -EAGAIN : -ERESTARTSYS);
2321                                 break;
2322                         }
2323                         if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2324                                         (readl(&ch_ctrl[channel].rs_status) &
2325                                                 C_RS_DCD))) {
2326                                 break;
2327                         }
2328                         if (signal_pending(current)) {
2329                                 retval = -ERESTARTSYS;
2330                                 break;
2331                         }
2332 #ifdef CY_DEBUG_OPEN
2333                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2334                                 "ttyC%d, count = %d\n",
2335                                 info->line, info->port.count);
2336 #endif
2337                         schedule();
2338                 }
2339         }
2340         __set_current_state(TASK_RUNNING);
2341         remove_wait_queue(&info->port.open_wait, &wait);
2342         if (!tty_hung_up_p(filp)) {
2343                 info->port.count++;
2344 #ifdef CY_DEBUG_COUNT
2345                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2346                         "count to %d\n", current->pid, info->port.count);
2347 #endif
2348         }
2349         info->port.blocked_open--;
2350 #ifdef CY_DEBUG_OPEN
2351         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2352                 "count = %d\n", info->line, info->port.count);
2353 #endif
2354         if (retval)
2355                 return retval;
2356         info->port.flags |= ASYNC_NORMAL_ACTIVE;
2357         return 0;
2358 }                               /* block_til_ready */
2359
2360 /*
2361  * This routine is called whenever a serial port is opened.  It
2362  * performs the serial-specific initialization for the tty structure.
2363  */
2364 static int cy_open(struct tty_struct *tty, struct file *filp)
2365 {
2366         struct cyclades_port *info;
2367         unsigned int i, line;
2368         int retval;
2369
2370         line = tty->index;
2371         if (tty->index < 0 || NR_PORTS <= line)
2372                 return -ENODEV;
2373
2374         for (i = 0; i < NR_CARDS; i++)
2375                 if (line < cy_card[i].first_line + cy_card[i].nports &&
2376                                 line >= cy_card[i].first_line)
2377                         break;
2378         if (i >= NR_CARDS)
2379                 return -ENODEV;
2380         info = &cy_card[i].ports[line - cy_card[i].first_line];
2381         if (info->line < 0)
2382                 return -ENODEV;
2383
2384         /* If the card's firmware hasn't been loaded,
2385            treat it as absent from the system.  This
2386            will make the user pay attention.
2387          */
2388         if (cy_is_Z(info->card)) {
2389                 struct cyclades_card *cinfo = info->card;
2390                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2391
2392                 if (!cyz_is_loaded(cinfo)) {
2393                         if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
2394                                         readl(&firm_id->signature) ==
2395                                         ZFIRM_HLT) {
2396                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2397                                         "need an external power supply for "
2398                                         "this number of ports.\nFirmware "
2399                                         "halted.\n");
2400                         } else {
2401                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2402                                         "yet loaded\n");
2403                         }
2404                         return -ENODEV;
2405                 }
2406 #ifdef CONFIG_CYZ_INTR
2407                 else {
2408                 /* In case this Z board is operating in interrupt mode, its
2409                    interrupts should be enabled as soon as the first open
2410                    happens to one of its ports. */
2411                         if (!cinfo->intr_enabled) {
2412                                 u16 intr;
2413
2414                                 /* Enable interrupts on the PLX chip */
2415                                 intr = readw(&cinfo->ctl_addr.p9060->
2416                                                 intr_ctrl_stat) | 0x0900;
2417                                 cy_writew(&cinfo->ctl_addr.p9060->
2418                                                 intr_ctrl_stat, intr);
2419                                 /* Enable interrupts on the FW */
2420                                 retval = cyz_issue_cmd(cinfo, 0,
2421                                                 C_CM_IRQ_ENBL, 0L);
2422                                 if (retval != 0) {
2423                                         printk(KERN_ERR "cyc:IRQ enable retval "
2424                                                 "was %x\n", retval);
2425                                 }
2426                                 cinfo->intr_enabled = 1;
2427                         }
2428                 }
2429 #endif                          /* CONFIG_CYZ_INTR */
2430                 /* Make sure this Z port really exists in hardware */
2431                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2432                         return -ENODEV;
2433         }
2434 #ifdef CY_DEBUG_OTHER
2435         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2436 #endif
2437         tty->driver_data = info;
2438         info->port.tty = tty;
2439         if (serial_paranoia_check(info, tty->name, "cy_open"))
2440                 return -ENODEV;
2441
2442 #ifdef CY_DEBUG_OPEN
2443         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2444                         info->port.count);
2445 #endif
2446         info->port.count++;
2447 #ifdef CY_DEBUG_COUNT
2448         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2449                 current->pid, info->port.count);
2450 #endif
2451
2452         /*
2453          * If the port is the middle of closing, bail out now
2454          */
2455         if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2456                 wait_event_interruptible(info->port.close_wait,
2457                                 !(info->port.flags & ASYNC_CLOSING));
2458                 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2459         }
2460
2461         /*
2462          * Start up serial port
2463          */
2464         retval = startup(info);
2465         if (retval)
2466                 return retval;
2467
2468         retval = block_til_ready(tty, filp, info);
2469         if (retval) {
2470 #ifdef CY_DEBUG_OPEN
2471                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2472                         "with %d\n", retval);
2473 #endif
2474                 return retval;
2475         }
2476
2477         info->throttle = 0;
2478
2479 #ifdef CY_DEBUG_OPEN
2480         printk(KERN_DEBUG "cyc:cy_open done\n");
2481 #endif
2482         return 0;
2483 }                               /* cy_open */
2484
2485 /*
2486  * cy_wait_until_sent() --- wait until the transmitter is empty
2487  */
2488 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2489 {
2490         struct cyclades_card *card;
2491         struct cyclades_port *info = tty->driver_data;
2492         void __iomem *base_addr;
2493         int chip, channel, index;
2494         unsigned long orig_jiffies;
2495         int char_time;
2496
2497         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2498                 return;
2499
2500         if (info->xmit_fifo_size == 0)
2501                 return;         /* Just in case.... */
2502
2503         orig_jiffies = jiffies;
2504         lock_kernel();
2505         /*
2506          * Set the check interval to be 1/5 of the estimated time to
2507          * send a single character, and make it at least 1.  The check
2508          * interval should also be less than the timeout.
2509          *
2510          * Note: we have to use pretty tight timings here to satisfy
2511          * the NIST-PCTS.
2512          */
2513         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2514         char_time = char_time / 5;
2515         if (char_time <= 0)
2516                 char_time = 1;
2517         if (timeout < 0)
2518                 timeout = 0;
2519         if (timeout)
2520                 char_time = min(char_time, timeout);
2521         /*
2522          * If the transmitter hasn't cleared in twice the approximate
2523          * amount of time to send the entire FIFO, it probably won't
2524          * ever clear.  This assumes the UART isn't doing flow
2525          * control, which is currently the case.  Hence, if it ever
2526          * takes longer than info->timeout, this is probably due to a
2527          * UART bug of some kind.  So, we clamp the timeout parameter at
2528          * 2*info->timeout.
2529          */
2530         if (!timeout || timeout > 2 * info->timeout)
2531                 timeout = 2 * info->timeout;
2532 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2533         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2534                 timeout, char_time, jiffies);
2535 #endif
2536         card = info->card;
2537         channel = (info->line) - (card->first_line);
2538         if (!cy_is_Z(card)) {
2539                 chip = channel >> 2;
2540                 channel &= 0x03;
2541                 index = card->bus_index;
2542                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2543                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2544 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2545                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2546 #endif
2547                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2548                                 break;
2549                         if (timeout && time_after(jiffies, orig_jiffies +
2550                                         timeout))
2551                                 break;
2552                 }
2553         }
2554         /* Run one more char cycle */
2555         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2556         unlock_kernel();
2557 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2558         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2559 #endif
2560 }
2561
2562 static void cy_flush_buffer(struct tty_struct *tty)
2563 {
2564         struct cyclades_port *info = tty->driver_data;
2565         struct cyclades_card *card;
2566         int channel, retval;
2567         unsigned long flags;
2568
2569 #ifdef CY_DEBUG_IO
2570         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2571 #endif
2572
2573         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2574                 return;
2575
2576         card = info->card;
2577         channel = info->line - card->first_line;
2578
2579         spin_lock_irqsave(&card->card_lock, flags);
2580         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2581         spin_unlock_irqrestore(&card->card_lock, flags);
2582
2583         if (cy_is_Z(card)) {    /* If it is a Z card, flush the on-board
2584                                            buffers as well */
2585                 spin_lock_irqsave(&card->card_lock, flags);
2586                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2587                 if (retval != 0) {
2588                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2589                                 "was %x\n", info->line, retval);
2590                 }
2591                 spin_unlock_irqrestore(&card->card_lock, flags);
2592         }
2593         tty_wakeup(tty);
2594 }                               /* cy_flush_buffer */
2595
2596
2597 /*
2598  * This routine is called when a particular tty device is closed.
2599  */
2600 static void cy_close(struct tty_struct *tty, struct file *filp)
2601 {
2602         struct cyclades_port *info = tty->driver_data;
2603         struct cyclades_card *card;
2604         unsigned long flags;
2605
2606 #ifdef CY_DEBUG_OTHER
2607         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2608 #endif
2609
2610         if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2611                 return;
2612
2613         card = info->card;
2614
2615         spin_lock_irqsave(&card->card_lock, flags);
2616         /* If the TTY is being hung up, nothing to do */
2617         if (tty_hung_up_p(filp)) {
2618                 spin_unlock_irqrestore(&card->card_lock, flags);
2619                 return;
2620         }
2621 #ifdef CY_DEBUG_OPEN
2622         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2623                 info->port.count);
2624 #endif
2625         if ((tty->count == 1) && (info->port.count != 1)) {
2626                 /*
2627                  * Uh, oh.  tty->count is 1, which means that the tty
2628                  * structure will be freed.  Info->count should always
2629                  * be one in these conditions.  If it's greater than
2630                  * one, we've got real problems, since it means the
2631                  * serial port won't be shutdown.
2632                  */
2633                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2634                         "tty->count is 1, info->port.count is %d\n", info->port.count);
2635                 info->port.count = 1;
2636         }
2637 #ifdef CY_DEBUG_COUNT
2638         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2639                 current->pid, info->port.count - 1);
2640 #endif
2641         if (--info->port.count < 0) {
2642 #ifdef CY_DEBUG_COUNT
2643                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2644 #endif
2645                 info->port.count = 0;
2646         }
2647         if (info->port.count) {
2648                 spin_unlock_irqrestore(&card->card_lock, flags);
2649                 return;
2650         }
2651         info->port.flags |= ASYNC_CLOSING;
2652
2653         /*
2654          * Now we wait for the transmit buffer to clear; and we notify
2655          * the line discipline to only process XON/XOFF characters.
2656          */
2657         tty->closing = 1;
2658         spin_unlock_irqrestore(&card->card_lock, flags);
2659         if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2660                 tty_wait_until_sent(tty, info->port.closing_wait);
2661
2662         spin_lock_irqsave(&card->card_lock, flags);
2663
2664         if (!cy_is_Z(card)) {
2665                 int channel = info->line - card->first_line;
2666                 int index = card->bus_index;
2667                 void __iomem *base_addr = card->base_addr +
2668                         (cy_chip_offset[channel >> 2] << index);
2669                 /* Stop accepting input */
2670                 channel &= 0x03;
2671                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2672                 cy_writeb(base_addr + (CySRER << index),
2673                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2674                 if (info->port.flags & ASYNC_INITIALIZED) {
2675                         /* Waiting for on-board buffers to be empty before
2676                            closing the port */
2677                         spin_unlock_irqrestore(&card->card_lock, flags);
2678                         cy_wait_until_sent(tty, info->timeout);
2679                         spin_lock_irqsave(&card->card_lock, flags);
2680                 }
2681         } else {
2682 #ifdef Z_WAKE
2683                 /* Waiting for on-board buffers to be empty before closing
2684                    the port */
2685                 void __iomem *base_addr = card->base_addr;
2686                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2687                 struct ZFW_CTRL __iomem *zfw_ctrl =
2688                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2689                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2690                 int channel = info->line - card->first_line;
2691                 int retval;
2692
2693                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2694                         retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2695                         if (retval != 0) {
2696                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2697                                         "ttyC%d was %x\n", info->line, retval);
2698                         }
2699                         spin_unlock_irqrestore(&card->card_lock, flags);
2700                         wait_for_completion_interruptible(&info->shutdown_wait);
2701                         spin_lock_irqsave(&card->card_lock, flags);
2702                 }
2703 #endif
2704         }
2705
2706         spin_unlock_irqrestore(&card->card_lock, flags);
2707         shutdown(info);
2708         cy_flush_buffer(tty);
2709         tty_ldisc_flush(tty);
2710         spin_lock_irqsave(&card->card_lock, flags);
2711
2712         tty->closing = 0;
2713         info->port.tty = NULL;
2714         if (info->port.blocked_open) {
2715                 spin_unlock_irqrestore(&card->card_lock, flags);
2716                 if (info->port.close_delay) {
2717                         msleep_interruptible(jiffies_to_msecs
2718                                                 (info->port.close_delay));
2719                 }
2720                 wake_up_interruptible(&info->port.open_wait);
2721                 spin_lock_irqsave(&card->card_lock, flags);
2722         }
2723         info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2724         wake_up_interruptible(&info->port.close_wait);
2725
2726 #ifdef CY_DEBUG_OTHER
2727         printk(KERN_DEBUG "cyc:cy_close done\n");
2728 #endif
2729
2730         spin_unlock_irqrestore(&card->card_lock, flags);
2731 }                               /* cy_close */
2732
2733 /* This routine gets called when tty_write has put something into
2734  * the write_queue.  The characters may come from user space or
2735  * kernel space.
2736  *
2737  * This routine will return the number of characters actually
2738  * accepted for writing.
2739  *
2740  * If the port is not already transmitting stuff, start it off by
2741  * enabling interrupts.  The interrupt service routine will then
2742  * ensure that the characters are sent.
2743  * If the port is already active, there is no need to kick it.
2744  *
2745  */
2746 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2747 {
2748         struct cyclades_port *info = tty->driver_data;
2749         unsigned long flags;
2750         int c, ret = 0;
2751
2752 #ifdef CY_DEBUG_IO
2753         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2754 #endif
2755
2756         if (serial_paranoia_check(info, tty->name, "cy_write"))
2757                 return 0;
2758
2759         if (!info->port.xmit_buf)
2760                 return 0;
2761
2762         spin_lock_irqsave(&info->card->card_lock, flags);
2763         while (1) {
2764                 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2765                 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2766
2767                 if (c <= 0)
2768                         break;
2769
2770                 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
2771                 info->xmit_head = (info->xmit_head + c) &
2772                         (SERIAL_XMIT_SIZE - 1);
2773                 info->xmit_cnt += c;
2774                 buf += c;
2775                 count -= c;
2776                 ret += c;
2777         }
2778         spin_unlock_irqrestore(&info->card->card_lock, flags);
2779
2780         info->idle_stats.xmit_bytes += ret;
2781         info->idle_stats.xmit_idle = jiffies;
2782
2783         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2784                 start_xmit(info);
2785
2786         return ret;
2787 }                               /* cy_write */
2788
2789 /*
2790  * This routine is called by the kernel to write a single
2791  * character to the tty device.  If the kernel uses this routine,
2792  * it must call the flush_chars() routine (if defined) when it is
2793  * done stuffing characters into the driver.  If there is no room
2794  * in the queue, the character is ignored.
2795  */
2796 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
2797 {
2798         struct cyclades_port *info = tty->driver_data;
2799         unsigned long flags;
2800
2801 #ifdef CY_DEBUG_IO
2802         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2803 #endif
2804
2805         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2806                 return 0;
2807
2808         if (!info->port.xmit_buf)
2809                 return 0;
2810
2811         spin_lock_irqsave(&info->card->card_lock, flags);
2812         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2813                 spin_unlock_irqrestore(&info->card->card_lock, flags);
2814                 return 0;
2815         }
2816
2817         info->port.xmit_buf[info->xmit_head++] = ch;
2818         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2819         info->xmit_cnt++;
2820         info->idle_stats.xmit_bytes++;
2821         info->idle_stats.xmit_idle = jiffies;
2822         spin_unlock_irqrestore(&info->card->card_lock, flags);
2823         return 1;
2824 }                               /* cy_put_char */
2825
2826 /*
2827  * This routine is called by the kernel after it has written a
2828  * series of characters to the tty device using put_char().
2829  */
2830 static void cy_flush_chars(struct tty_struct *tty)
2831 {
2832         struct cyclades_port *info = tty->driver_data;
2833
2834 #ifdef CY_DEBUG_IO
2835         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2836 #endif
2837
2838         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2839                 return;
2840
2841         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2842                         !info->port.xmit_buf)
2843                 return;
2844
2845         start_xmit(info);
2846 }                               /* cy_flush_chars */
2847
2848 /*
2849  * This routine returns the numbers of characters the tty driver
2850  * will accept for queuing to be written.  This number is subject
2851  * to change as output buffers get emptied, or if the output flow
2852  * control is activated.
2853  */
2854 static int cy_write_room(struct tty_struct *tty)
2855 {
2856         struct cyclades_port *info = tty->driver_data;
2857         int ret;
2858
2859 #ifdef CY_DEBUG_IO
2860         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2861 #endif
2862
2863         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2864                 return 0;
2865         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2866         if (ret < 0)
2867                 ret = 0;
2868         return ret;
2869 }                               /* cy_write_room */
2870
2871 static int cy_chars_in_buffer(struct tty_struct *tty)
2872 {
2873         struct cyclades_card *card;
2874         struct cyclades_port *info = tty->driver_data;
2875         int channel;
2876
2877         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2878                 return 0;
2879
2880         card = info->card;
2881         channel = (info->line) - (card->first_line);
2882
2883 #ifdef Z_EXT_CHARS_IN_BUFFER
2884         if (!cy_is_Z(card)) {
2885 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2886 #ifdef CY_DEBUG_IO
2887                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2888                         info->line, info->xmit_cnt);
2889 #endif
2890                 return info->xmit_cnt;
2891 #ifdef Z_EXT_CHARS_IN_BUFFER
2892         } else {
2893                 static struct FIRM_ID *firm_id;
2894                 static struct ZFW_CTRL *zfw_ctrl;
2895                 static struct CH_CTRL *ch_ctrl;
2896                 static struct BUF_CTRL *buf_ctrl;
2897                 int char_count;
2898                 __u32 tx_put, tx_get, tx_bufsize;
2899
2900                 lock_kernel();
2901                 firm_id = card->base_addr + ID_ADDRESS;
2902                 zfw_ctrl = card->base_addr +
2903                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2904                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2905                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2906
2907                 tx_get = readl(&buf_ctrl->tx_get);
2908                 tx_put = readl(&buf_ctrl->tx_put);
2909                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2910                 if (tx_put >= tx_get)
2911                         char_count = tx_put - tx_get;
2912                 else
2913                         char_count = tx_put - tx_get + tx_bufsize;
2914 #ifdef CY_DEBUG_IO
2915                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2916                         info->line, info->xmit_cnt + char_count);
2917 #endif
2918                 unlock_kernel();
2919                 return info->xmit_cnt + char_count;
2920         }
2921 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2922 }                               /* cy_chars_in_buffer */
2923
2924 /*
2925  * ------------------------------------------------------------
2926  * cy_ioctl() and friends
2927  * ------------------------------------------------------------
2928  */
2929
2930 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2931 {
2932         int co, co_val, bpr;
2933         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2934                         25000000);
2935
2936         if (baud == 0) {
2937                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2938                 return;
2939         }
2940
2941         /* determine which prescaler to use */
2942         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2943                 if (cy_clock / co_val / baud > 63)
2944                         break;
2945         }
2946
2947         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2948         if (bpr > 255)
2949                 bpr = 255;
2950
2951         info->tbpr = info->rbpr = bpr;
2952         info->tco = info->rco = co;
2953 }
2954
2955 /*
2956  * This routine finds or computes the various line characteristics.
2957  * It used to be called config_setup
2958  */
2959 static void set_line_char(struct cyclades_port *info)
2960 {
2961         struct cyclades_card *card;
2962         unsigned long flags;
2963         void __iomem *base_addr;
2964         int chip, channel, index;
2965         unsigned cflag, iflag;
2966         int baud, baud_rate = 0;
2967         int i;
2968
2969         if (!info->port.tty || !info->port.tty->termios)
2970                 return;
2971
2972         if (info->line == -1)
2973                 return;
2974
2975         cflag = info->port.tty->termios->c_cflag;
2976         iflag = info->port.tty->termios->c_iflag;
2977
2978         /*
2979          * Set up the tty->alt_speed kludge
2980          */
2981         if (info->port.tty) {
2982                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2983                         info->port.tty->alt_speed = 57600;
2984                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2985                         info->port.tty->alt_speed = 115200;
2986                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2987                         info->port.tty->alt_speed = 230400;
2988                 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2989                         info->port.tty->alt_speed = 460800;
2990         }
2991
2992         card = info->card;
2993         channel = info->line - card->first_line;
2994
2995         if (!cy_is_Z(card)) {
2996
2997                 index = card->bus_index;
2998
2999                 /* baud rate */
3000                 baud = tty_get_baud_rate(info->port.tty);
3001                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3002                                 ASYNC_SPD_CUST) {
3003                         if (info->custom_divisor)
3004                                 baud_rate = info->baud / info->custom_divisor;
3005                         else
3006                                 baud_rate = info->baud;
3007                 } else if (baud > CD1400_MAX_SPEED) {
3008                         baud = CD1400_MAX_SPEED;
3009                 }
3010                 /* find the baud index */
3011                 for (i = 0; i < 20; i++) {
3012                         if (baud == baud_table[i])
3013                                 break;
3014                 }
3015                 if (i == 20)
3016                         i = 19; /* CD1400_MAX_SPEED */
3017
3018                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3019                                 ASYNC_SPD_CUST) {
3020                         cyy_baud_calc(info, baud_rate);
3021                 } else {
3022                         if (info->chip_rev >= CD1400_REV_J) {
3023                                 /* It is a CD1400 rev. J or later */
3024                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3025                                 info->tco = baud_co_60[i];      /* Tx CO */
3026                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3027                                 info->rco = baud_co_60[i];      /* Rx CO */
3028                         } else {
3029                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3030                                 info->tco = baud_co_25[i];      /* Tx CO */
3031                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3032                                 info->rco = baud_co_25[i];      /* Rx CO */
3033                         }
3034                 }
3035                 if (baud_table[i] == 134) {
3036                         /* get it right for 134.5 baud */
3037                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3038                                         2;
3039                 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3040                                 ASYNC_SPD_CUST) {
3041                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3042                                         baud_rate) + 2;
3043                 } else if (baud_table[i]) {
3044                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3045                                         baud_table[i]) + 2;
3046                         /* this needs to be propagated into the card info */
3047                 } else {
3048                         info->timeout = 0;
3049                 }
3050                 /* By tradition (is it a standard?) a baud rate of zero
3051                    implies the line should be/has been closed.  A bit
3052                    later in this routine such a test is performed. */
3053
3054                 /* byte size and parity */
3055                 info->cor5 = 0;
3056                 info->cor4 = 0;
3057                 /* receive threshold */
3058                 info->cor3 = (info->default_threshold ?
3059                                 info->default_threshold : baud_cor3[i]);
3060                 info->cor2 = CyETC;
3061                 switch (cflag & CSIZE) {
3062                 case CS5:
3063                         info->cor1 = Cy_5_BITS;
3064                         break;
3065                 case CS6:
3066                         info->cor1 = Cy_6_BITS;
3067                         break;
3068                 case CS7:
3069                         info->cor1 = Cy_7_BITS;
3070                         break;
3071                 case CS8:
3072                         info->cor1 = Cy_8_BITS;
3073                         break;
3074                 }
3075                 if (cflag & CSTOPB)
3076                         info->cor1 |= Cy_2_STOP;
3077
3078                 if (cflag & PARENB) {
3079                         if (cflag & PARODD)
3080                                 info->cor1 |= CyPARITY_O;
3081                         else
3082                                 info->cor1 |= CyPARITY_E;
3083                 } else
3084                         info->cor1 |= CyPARITY_NONE;
3085
3086                 /* CTS flow control flag */
3087                 if (cflag & CRTSCTS) {
3088                         info->port.flags |= ASYNC_CTS_FLOW;
3089                         info->cor2 |= CyCtsAE;
3090                 } else {
3091                         info->port.flags &= ~ASYNC_CTS_FLOW;
3092                         info->cor2 &= ~CyCtsAE;
3093                 }
3094                 if (cflag & CLOCAL)
3095                         info->port.flags &= ~ASYNC_CHECK_CD;
3096                 else
3097                         info->port.flags |= ASYNC_CHECK_CD;
3098
3099          /***********************************************
3100             The hardware option, CyRtsAO, presents RTS when
3101             the chip has characters to send.  Since most modems
3102             use RTS as reverse (inbound) flow control, this
3103             option is not used.  If inbound flow control is
3104             necessary, DTR can be programmed to provide the
3105             appropriate signals for use with a non-standard
3106             cable.  Contact Marcio Saito for details.
3107          ***********************************************/
3108
3109                 chip = channel >> 2;
3110                 channel &= 0x03;
3111                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3112
3113                 spin_lock_irqsave(&card->card_lock, flags);
3114                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3115
3116                 /* tx and rx baud rate */
3117
3118                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3119                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3120                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3121                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3122
3123                 /* set line characteristics  according configuration */
3124
3125                 cy_writeb(base_addr + (CySCHR1 << index),
3126                           START_CHAR(info->port.tty));
3127                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty));
3128                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3129                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3130                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3131                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3132                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3133
3134                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3135                                 CyCOR3ch, index);
3136
3137                 /* !!! Is this needed? */
3138                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3139                 cy_writeb(base_addr + (CyRTPR << index),
3140                         (info->default_timeout ? info->default_timeout : 0x02));
3141                 /* 10ms rx timeout */
3142
3143                 if (C_CLOCAL(info->port.tty)) {
3144                         /* without modem intr */
3145                         cy_writeb(base_addr + (CySRER << index),
3146                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3147                         /* act on 1->0 modem transitions */
3148                         if ((cflag & CRTSCTS) && info->rflow) {
3149                                 cy_writeb(base_addr + (CyMCOR1 << index),
3150                                           (CyCTS | rflow_thr[i]));
3151                         } else {
3152                                 cy_writeb(base_addr + (CyMCOR1 << index),
3153                                           CyCTS);
3154                         }
3155                         /* act on 0->1 modem transitions */
3156                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3157                 } else {
3158                         /* without modem intr */
3159                         cy_writeb(base_addr + (CySRER << index),
3160                                   readb(base_addr +
3161                                            (CySRER << index)) | CyMdmCh);
3162                         /* act on 1->0 modem transitions */
3163                         if ((cflag & CRTSCTS) && info->rflow) {
3164                                 cy_writeb(base_addr + (CyMCOR1 << index),
3165                                           (CyDSR | CyCTS | CyRI | CyDCD |
3166                                            rflow_thr[i]));
3167                         } else {
3168                                 cy_writeb(base_addr + (CyMCOR1 << index),
3169                                           CyDSR | CyCTS | CyRI | CyDCD);
3170                         }
3171                         /* act on 0->1 modem transitions */
3172                         cy_writeb(base_addr + (CyMCOR2 << index),
3173                                   CyDSR | CyCTS | CyRI | CyDCD);
3174                 }
3175
3176                 if (i == 0) {   /* baud rate is zero, turn off line */
3177                         if (info->rtsdtr_inv) {
3178                                 cy_writeb(base_addr + (CyMSVR1 << index),
3179                                           ~CyRTS);
3180                         } else {
3181                                 cy_writeb(base_addr + (CyMSVR2 << index),
3182                                           ~CyDTR);
3183                         }
3184 #ifdef CY_DEBUG_DTR
3185                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3186                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3187                                 readb(base_addr + (CyMSVR1 << index)),
3188                                 readb(base_addr + (CyMSVR2 << index)));
3189 #endif
3190                 } else {
3191                         if (info->rtsdtr_inv) {
3192                                 cy_writeb(base_addr + (CyMSVR1 << index),
3193                                           CyRTS);
3194                         } else {
3195                                 cy_writeb(base_addr + (CyMSVR2 << index),
3196                                           CyDTR);
3197                         }
3198 #ifdef CY_DEBUG_DTR
3199                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3200                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3201                                 readb(base_addr + (CyMSVR1 << index)),
3202                                 readb(base_addr + (CyMSVR2 << index)));
3203 #endif
3204                 }
3205
3206                 if (info->port.tty)
3207                         clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3208                 spin_unlock_irqrestore(&card->card_lock, flags);
3209
3210         } else {
3211                 struct FIRM_ID __iomem *firm_id;
3212                 struct ZFW_CTRL __iomem *zfw_ctrl;
3213                 struct CH_CTRL __iomem *ch_ctrl;
3214                 __u32 sw_flow;
3215                 int retval;
3216
3217                 firm_id = card->base_addr + ID_ADDRESS;
3218                 if (!cyz_is_loaded(card))
3219                         return;
3220
3221                 zfw_ctrl = card->base_addr +
3222                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3223                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3224
3225                 /* baud rate */
3226                 baud = tty_get_baud_rate(info->port.tty);
3227                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3228                                 ASYNC_SPD_CUST) {
3229                         if (info->custom_divisor)
3230                                 baud_rate = info->baud / info->custom_divisor;
3231                         else
3232                                 baud_rate = info->baud;
3233                 } else if (baud > CYZ_MAX_SPEED) {
3234                         baud = CYZ_MAX_SPEED;
3235                 }
3236                 cy_writel(&ch_ctrl->comm_baud, baud);
3237
3238                 if (baud == 134) {
3239                         /* get it right for 134.5 baud */
3240                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3241                                         2;
3242                 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3243                                 ASYNC_SPD_CUST) {
3244                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3245                                         baud_rate) + 2;
3246                 } else if (baud) {
3247                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3248                                         baud) + 2;
3249                         /* this needs to be propagated into the card info */
3250                 } else {
3251                         info->timeout = 0;
3252                 }
3253
3254                 /* byte size and parity */
3255                 switch (cflag & CSIZE) {
3256                 case CS5:
3257                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3258                         break;
3259                 case CS6:
3260                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3261                         break;
3262                 case CS7:
3263                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3264                         break;
3265                 case CS8:
3266                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3267                         break;
3268                 }
3269                 if (cflag & CSTOPB) {
3270                         cy_writel(&ch_ctrl->comm_data_l,
3271                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3272                 } else {
3273                         cy_writel(&ch_ctrl->comm_data_l,
3274                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3275                 }
3276                 if (cflag & PARENB) {
3277                         if (cflag & PARODD)
3278                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3279                         else
3280                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3281                 } else
3282                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3283
3284                 /* CTS flow control flag */
3285                 if (cflag & CRTSCTS) {
3286                         cy_writel(&ch_ctrl->hw_flow,
3287                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3288                 } else {
3289                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3290                                         ~(C_RS_CTS | C_RS_RTS));
3291                 }
3292                 /* As the HW flow control is done in firmware, the driver
3293                    doesn't need to care about it */
3294                 info->port.flags &= ~ASYNC_CTS_FLOW;
3295
3296                 /* XON/XOFF/XANY flow control flags */
3297                 sw_flow = 0;
3298                 if (iflag & IXON) {
3299                         sw_flow |= C_FL_OXX;
3300                         if (iflag & IXANY)
3301                                 sw_flow |= C_FL_OIXANY;
3302                 }
3303                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3304
3305                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3306                 if (retval != 0) {
3307                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3308                                 "was %x\n", info->line, retval);
3309                 }
3310
3311                 /* CD sensitivity */
3312                 if (cflag & CLOCAL)
3313                         info->port.flags &= ~ASYNC_CHECK_CD;
3314                 else
3315                         info->port.flags |= ASYNC_CHECK_CD;
3316
3317                 if (baud == 0) {        /* baud rate is zero, turn off line */
3318                         cy_writel(&ch_ctrl->rs_control,
3319                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3320 #ifdef CY_DEBUG_DTR
3321                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3322 #endif
3323                 } else {
3324                         cy_writel(&ch_ctrl->rs_control,
3325                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3326 #ifdef CY_DEBUG_DTR
3327                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3328 #endif
3329                 }
3330
3331                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3332                 if (retval != 0) {
3333                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3334                                 "was %x\n", info->line, retval);
3335                 }
3336
3337                 if (info->port.tty)
3338                         clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
3339         }
3340 }                               /* set_line_char */
3341
3342 static int
3343 get_serial_info(struct cyclades_port *info,
3344                 struct serial_struct __user *retinfo)
3345 {
3346         struct serial_struct tmp;
3347         struct cyclades_card *cinfo = info->card;
3348
3349         if (!retinfo)
3350                 return -EFAULT;
3351         memset(&tmp, 0, sizeof(tmp));
3352         tmp.type = info->type;
3353         tmp.line = info->line;
3354         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3355                 cinfo->first_line;
3356         tmp.irq = cinfo->irq;
3357         tmp.flags = info->port.flags;
3358         tmp.close_delay = info->port.close_delay;
3359         tmp.closing_wait = info->port.closing_wait;
3360         tmp.baud_base = info->baud;
3361         tmp.custom_divisor = info->custom_divisor;
3362         tmp.hub6 = 0;           /*!!! */
3363         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3364 }                               /* get_serial_info */
3365
3366 static int
3367 set_serial_info(struct cyclades_port *info,
3368                 struct serial_struct __user *new_info)
3369 {
3370         struct serial_struct new_serial;
3371         struct cyclades_port old_info;
3372
3373         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3374                 return -EFAULT;
3375         old_info = *info;
3376
3377         if (!capable(CAP_SYS_ADMIN)) {
3378                 if (new_serial.close_delay != info->port.close_delay ||
3379                                 new_serial.baud_base != info->baud ||
3380                                 (new_serial.flags & ASYNC_FLAGS &
3381                                         ~ASYNC_USR_MASK) !=
3382                                 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3383                         return -EPERM;
3384                 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
3385                                 (new_serial.flags & ASYNC_USR_MASK);
3386                 info->baud = new_serial.baud_base;
3387                 info->custom_divisor = new_serial.custom_divisor;
3388                 goto check_and_exit;
3389         }
3390
3391         /*
3392          * OK, past this point, all the error checking has been done.
3393          * At this point, we start making changes.....
3394          */
3395
3396         info->baud = new_serial.baud_base;
3397         info->custom_divisor = new_serial.custom_divisor;
3398         info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
3399                         (new_serial.flags & ASYNC_FLAGS);
3400         info->port.close_delay = new_serial.close_delay * HZ / 100;
3401         info->port.closing_wait = new_serial.closing_wait * HZ / 100;
3402
3403 check_and_exit:
3404         if (info->port.flags & ASYNC_INITIALIZED) {
3405                 set_line_char(info);
3406                 return 0;
3407         } else {
3408                 return startup(info);
3409         }
3410 }                               /* set_serial_info */
3411
3412 /*
3413  * get_lsr_info - get line status register info
3414  *
3415  * Purpose: Let user call ioctl() to get info when the UART physically
3416  *          is emptied.  On bus types like RS485, the transmitter must
3417  *          release the bus after transmitting. This must be done when
3418  *          the transmit shift register is empty, not be done when the
3419  *          transmit holding register is empty.  This functionality
3420  *          allows an RS485 driver to be written in user space.
3421  */
3422 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3423 {
3424         struct cyclades_card *card;
3425         int chip, channel, index;
3426         unsigned char status;
3427         unsigned int result;
3428         unsigned long flags;
3429         void __iomem *base_addr;
3430
3431         card = info->card;
3432         channel = (info->line) - (card->first_line);
3433         if (!cy_is_Z(card)) {
3434                 chip = channel >> 2;
3435                 channel &= 0x03;
3436                 index = card->bus_index;
3437                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3438
3439                 spin_lock_irqsave(&card->card_lock, flags);
3440                 status = readb(base_addr + (CySRER << index)) &
3441                                 (CyTxRdy | CyTxMpty);
3442                 spin_unlock_irqrestore(&card->card_lock, flags);
3443                 result = (status ? 0 : TIOCSER_TEMT);
3444         } else {
3445                 /* Not supported yet */
3446                 return -EINVAL;
3447         }
3448         return put_user(result, (unsigned long __user *)value);
3449 }
3450
3451 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3452 {
3453         struct cyclades_port *info = tty->driver_data;
3454         struct cyclades_card *card;
3455         int chip, channel, index;
3456         void __iomem *base_addr;
3457         unsigned long flags;
3458         unsigned char status;
3459         unsigned long lstatus;
3460         unsigned int result;
3461         struct FIRM_ID __iomem *firm_id;
3462         struct ZFW_CTRL __iomem *zfw_ctrl;
3463         struct BOARD_CTRL __iomem *board_ctrl;
3464         struct CH_CTRL __iomem *ch_ctrl;
3465
3466         if (serial_paranoia_check(info, tty->name, __func__))
3467                 return -ENODEV;
3468
3469         lock_kernel();
3470
3471         card = info->card;
3472         channel = info->line - card->first_line;
3473         if (!cy_is_Z(card)) {
3474                 chip = channel >> 2;
3475                 channel &= 0x03;
3476                 index = card->bus_index;
3477                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3478
3479                 spin_lock_irqsave(&card->card_lock, flags);
3480                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3481                 status = readb(base_addr + (CyMSVR1 << index));
3482                 status |= readb(base_addr + (CyMSVR2 << index));
3483                 spin_unlock_irqrestore(&card->card_lock, flags);
3484
3485                 if (info->rtsdtr_inv) {
3486                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3487                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3488                 } else {
3489                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3490                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3491                 }
3492                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3493                         ((status & CyRI) ? TIOCM_RNG : 0) |
3494                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3495                         ((status & CyCTS) ? TIOCM_CTS : 0);
3496         } else {
3497                 base_addr = card->base_addr;
3498                 firm_id = card->base_addr + ID_ADDRESS;
3499                 if (cyz_is_loaded(card)) {
3500                         zfw_ctrl = card->base_addr +
3501                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3502                         board_ctrl = &zfw_ctrl->board_ctrl;
3503                         ch_ctrl = zfw_ctrl->ch_ctrl;
3504                         lstatus = readl(&ch_ctrl[channel].rs_status);
3505                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3506                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3507                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3508                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3509                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3510                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3511                 } else {
3512                         result = 0;
3513                         unlock_kernel();
3514                         return -ENODEV;
3515                 }
3516
3517         }
3518         unlock_kernel();
3519         return result;
3520 }                               /* cy_tiomget */
3521
3522 static int
3523 cy_tiocmset(struct tty_struct *tty, struct file *file,
3524                 unsigned int set, unsigned int clear)
3525 {
3526         struct cyclades_port *info = tty->driver_data;
3527         struct cyclades_card *card;
3528         int chip, channel, index;
3529         void __iomem *base_addr;
3530         unsigned long flags;
3531         struct FIRM_ID __iomem *firm_id;
3532         struct ZFW_CTRL __iomem *zfw_ctrl;
3533         struct BOARD_CTRL __iomem *board_ctrl;
3534         struct CH_CTRL __iomem *ch_ctrl;
3535         int retval;
3536
3537         if (serial_paranoia_check(info, tty->name, __func__))
3538                 return -ENODEV;
3539
3540         card = info->card;
3541         channel = (info->line) - (card->first_line);
3542         if (!cy_is_Z(card)) {
3543                 chip = channel >> 2;
3544                 channel &= 0x03;
3545                 index = card->bus_index;
3546                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3547
3548                 if (set & TIOCM_RTS) {
3549                         spin_lock_irqsave(&card->card_lock, flags);
3550                         cy_writeb(base_addr + (CyCAR << index),
3551                                   (u_char) channel);
3552                         if (info->rtsdtr_inv) {
3553                                 cy_writeb(base_addr + (CyMSVR2 << index),
3554                                           CyDTR);
3555                         } else {
3556                                 cy_writeb(base_addr + (CyMSVR1 << index),
3557                                           CyRTS);
3558                         }
3559                         spin_unlock_irqrestore(&card->card_lock, flags);
3560                 }
3561                 if (clear & TIOCM_RTS) {
3562                         spin_lock_irqsave(&card->card_lock, flags);
3563                         cy_writeb(base_addr + (CyCAR << index),
3564                                   (u_char) channel);
3565                         if (info->rtsdtr_inv) {
3566                                 cy_writeb(base_addr + (CyMSVR2 << index),
3567                                           ~CyDTR);
3568                         } else {
3569                                 cy_writeb(base_addr + (CyMSVR1 << index),
3570                                           ~CyRTS);
3571                         }
3572                         spin_unlock_irqrestore(&card->card_lock, flags);
3573                 }
3574                 if (set & TIOCM_DTR) {
3575                         spin_lock_irqsave(&card->card_lock, flags);
3576                         cy_writeb(base_addr + (CyCAR << index),
3577                                   (u_char) channel);
3578                         if (info->rtsdtr_inv) {
3579                                 cy_writeb(base_addr + (CyMSVR1 << index),
3580                                           CyRTS);
3581                         } else {
3582                                 cy_writeb(base_addr + (CyMSVR2 << index),
3583                                           CyDTR);
3584                         }
3585 #ifdef CY_DEBUG_DTR
3586                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3587                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3588                                 readb(base_addr + (CyMSVR1 << index)),
3589                                 readb(base_addr + (CyMSVR2 << index)));
3590 #endif
3591                         spin_unlock_irqrestore(&card->card_lock, flags);
3592                 }
3593                 if (clear & TIOCM_DTR) {
3594                         spin_lock_irqsave(&card->card_lock, flags);
3595                         cy_writeb(base_addr + (CyCAR << index),
3596                                   (u_char) channel);
3597                         if (info->rtsdtr_inv) {
3598                                 cy_writeb(base_addr + (CyMSVR1 << index),
3599                                           ~CyRTS);
3600                         } else {
3601                                 cy_writeb(base_addr + (CyMSVR2 << index),
3602                                           ~CyDTR);
3603                         }
3604
3605 #ifdef CY_DEBUG_DTR
3606                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3607                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3608                                 readb(base_addr + (CyMSVR1 << index)),
3609                                 readb(base_addr + (CyMSVR2 << index)));
3610 #endif
3611                         spin_unlock_irqrestore(&card->card_lock, flags);
3612                 }
3613         } else {
3614                 base_addr = card->base_addr;
3615
3616                 firm_id = card->base_addr + ID_ADDRESS;
3617                 if (cyz_is_loaded(card)) {
3618                         zfw_ctrl = card->base_addr +
3619                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3620                         board_ctrl = &zfw_ctrl->board_ctrl;
3621                         ch_ctrl = zfw_ctrl->ch_ctrl;
3622
3623                         if (set & TIOCM_RTS) {
3624                                 spin_lock_irqsave(&card->card_lock, flags);
3625                                 cy_writel(&ch_ctrl[channel].rs_control,
3626                                         readl(&ch_ctrl[channel].rs_control) |
3627                                         C_RS_RTS);
3628                                 spin_unlock_irqrestore(&card->card_lock, flags);
3629                         }
3630                         if (clear & TIOCM_RTS) {
3631                                 spin_lock_irqsave(&card->card_lock, flags);
3632                                 cy_writel(&ch_ctrl[channel].rs_control,
3633                                         readl(&ch_ctrl[channel].rs_control) &
3634                                         ~C_RS_RTS);
3635                                 spin_unlock_irqrestore(&card->card_lock, flags);
3636                         }
3637                         if (set & TIOCM_DTR) {
3638                                 spin_lock_irqsave(&card->card_lock, flags);
3639                                 cy_writel(&ch_ctrl[channel].rs_control,
3640                                         readl(&ch_ctrl[channel].rs_control) |
3641                                         C_RS_DTR);
3642 #ifdef CY_DEBUG_DTR
3643                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3644                                         "Z DTR\n");
3645 #endif
3646                                 spin_unlock_irqrestore(&card->card_lock, flags);
3647                         }
3648                         if (clear & TIOCM_DTR) {
3649                                 spin_lock_irqsave(&card->card_lock, flags);
3650                                 cy_writel(&ch_ctrl[channel].rs_control,
3651                                         readl(&ch_ctrl[channel].rs_control) &
3652                                         ~C_RS_DTR);
3653 #ifdef CY_DEBUG_DTR
3654                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3655                                         "Z DTR\n");
3656 #endif
3657                                 spin_unlock_irqrestore(&card->card_lock, flags);
3658                         }
3659                 } else {
3660                         return -ENODEV;
3661                 }
3662                 spin_lock_irqsave(&card->card_lock, flags);
3663                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3664                 if (retval != 0) {
3665                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3666                                 "was %x\n", info->line, retval);
3667                 }
3668                 spin_unlock_irqrestore(&card->card_lock, flags);
3669         }
3670         return 0;
3671 }                               /* cy_tiocmset */
3672
3673 /*
3674  * cy_break() --- routine which turns the break handling on or off
3675  */
3676 static int cy_break(struct tty_struct *tty, int break_state)
3677 {
3678         struct cyclades_port *info = tty->driver_data;
3679         struct cyclades_card *card;
3680         unsigned long flags;
3681         int retval = 0;
3682
3683         if (serial_paranoia_check(info, tty->name, "cy_break"))
3684                 return -EINVAL;
3685
3686         card = info->card;
3687
3688         spin_lock_irqsave(&card->card_lock, flags);
3689         if (!cy_is_Z(card)) {
3690                 /* Let the transmit ISR take care of this (since it
3691                    requires stuffing characters into the output stream).
3692                  */
3693                 if (break_state == -1) {
3694                         if (!info->breakon) {
3695                                 info->breakon = 1;
3696                                 if (!info->xmit_cnt) {
3697                                         spin_unlock_irqrestore(&card->card_lock, flags);
3698                                         start_xmit(info);
3699                                         spin_lock_irqsave(&card->card_lock, flags);
3700                                 }
3701                         }
3702                 } else {
3703                         if (!info->breakoff) {
3704                                 info->breakoff = 1;
3705                                 if (!info->xmit_cnt) {
3706                                         spin_unlock_irqrestore(&card->card_lock, flags);
3707                                         start_xmit(info);
3708                                         spin_lock_irqsave(&card->card_lock, flags);
3709                                 }
3710                         }
3711                 }
3712         } else {
3713                 if (break_state == -1) {
3714                         retval = cyz_issue_cmd(card,
3715                                 info->line - card->first_line,
3716                                 C_CM_SET_BREAK, 0L);
3717                         if (retval != 0) {
3718                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3719                                         "ttyC%d was %x\n", info->line, retval);
3720                         }
3721                 } else {
3722                         retval = cyz_issue_cmd(card,
3723                                 info->line - card->first_line,
3724                                 C_CM_CLR_BREAK, 0L);
3725                         if (retval != 0) {
3726                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3727                                         "on ttyC%d was %x\n", info->line,
3728                                         retval);
3729                         }
3730                 }
3731         }
3732         spin_unlock_irqrestore(&card->card_lock, flags);
3733         return retval;
3734 }                               /* cy_break */
3735
3736 static int get_mon_info(struct cyclades_port *info,
3737                                 struct cyclades_monitor __user *mon)
3738 {
3739
3740         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3741                 return -EFAULT;
3742         info->mon.int_count = 0;
3743         info->mon.char_count = 0;
3744         info->mon.char_max = 0;
3745         info->mon.char_last = 0;
3746         return 0;
3747 }                               /* get_mon_info */
3748
3749 static int set_threshold(struct cyclades_port *info, unsigned long value)
3750 {
3751         struct cyclades_card *card;
3752         void __iomem *base_addr;
3753         int channel, chip, index;
3754         unsigned long flags;
3755
3756         card = info->card;
3757         channel = info->line - card->first_line;
3758         if (!cy_is_Z(card)) {
3759                 chip = channel >> 2;
3760                 channel &= 0x03;
3761                 index = card->bus_index;
3762                 base_addr =
3763                     card->base_addr + (cy_chip_offset[chip] << index);
3764
3765                 info->cor3 &= ~CyREC_FIFO;
3766                 info->cor3 |= value & CyREC_FIFO;
3767
3768                 spin_lock_irqsave(&card->card_lock, flags);
3769                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3770                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3771                 spin_unlock_irqrestore(&card->card_lock, flags);
3772         }
3773         return 0;
3774 }                               /* set_threshold */
3775
3776 static int get_threshold(struct cyclades_port *info,
3777                                                 unsigned long __user *value)
3778 {
3779         struct cyclades_card *card;
3780         void __iomem *base_addr;
3781         int channel, chip, index;
3782         unsigned long tmp;
3783
3784         card = info->card;
3785         channel = info->line - card->first_line;
3786         if (!cy_is_Z(card)) {
3787                 chip = channel >> 2;
3788                 channel &= 0x03;
3789                 index = card->bus_index;
3790                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3791
3792                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3793                 return put_user(tmp, value);
3794         }
3795         return 0;
3796 }                               /* get_threshold */
3797
3798 static int set_default_threshold(struct cyclades_port *info,
3799                                                         unsigned long value)
3800 {
3801         info->default_threshold = value & 0x0f;
3802         return 0;
3803 }                               /* set_default_threshold */
3804
3805 static int get_default_threshold(struct cyclades_port *info,
3806                                                 unsigned long __user *value)
3807 {
3808         return put_user(info->default_threshold, value);
3809 }                               /* get_default_threshold */
3810
3811 static int set_timeout(struct cyclades_port *info, unsigned long value)
3812 {
3813         struct cyclades_card *card;
3814         void __iomem *base_addr;
3815         int channel, chip, index;
3816         unsigned long flags;
3817
3818         card = info->card;
3819         channel = info->line - card->first_line;
3820         if (!cy_is_Z(card)) {
3821                 chip = channel >> 2;
3822                 channel &= 0x03;
3823                 index = card->bus_index;
3824                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3825
3826                 spin_lock_irqsave(&card->card_lock, flags);
3827                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3828                 spin_unlock_irqrestore(&card->card_lock, flags);
3829         }
3830         return 0;
3831 }                               /* set_timeout */
3832
3833 static int get_timeout(struct cyclades_port *info,
3834                                                 unsigned long __user *value)
3835 {
3836         struct cyclades_card *card;
3837         void __iomem *base_addr;
3838         int channel, chip, index;
3839         unsigned long tmp;
3840
3841         card = info->card;
3842         channel = info->line - card->first_line;
3843         if (!cy_is_Z(card)) {
3844                 chip = channel >> 2;
3845                 channel &= 0x03;
3846                 index = card->bus_index;
3847                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3848
3849                 tmp = readb(base_addr + (CyRTPR << index));
3850                 return put_user(tmp, value);
3851         }
3852         return 0;
3853 }                               /* get_timeout */
3854
3855 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3856 {
3857         info->default_timeout = value & 0xff;
3858         return 0;
3859 }                               /* set_default_timeout */
3860
3861 static int get_default_timeout(struct cyclades_port *info,
3862                                         unsigned long __user *value)
3863 {
3864         return put_user(info->default_timeout, value);
3865 }                               /* get_default_timeout */
3866
3867 /*
3868  * This routine allows the tty driver to implement device-
3869  * specific ioctl's.  If the ioctl number passed in cmd is
3870  * not recognized by the driver, it should return ENOIOCTLCMD.
3871  */
3872 static int
3873 cy_ioctl(struct tty_struct *tty, struct file *file,
3874          unsigned int cmd, unsigned long arg)
3875 {
3876         struct cyclades_port *info = tty->driver_data;
3877         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
3878         struct serial_icounter_struct __user *p_cuser;  /* user space */
3879         int ret_val = 0;
3880         unsigned long flags;
3881         void __user *argp = (void __user *)arg;
3882
3883         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3884                 return -ENODEV;
3885
3886 #ifdef CY_DEBUG_OTHER
3887         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3888                 info->line, cmd, arg);
3889 #endif
3890         lock_kernel();
3891
3892         switch (cmd) {
3893         case CYGETMON:
3894                 ret_val = get_mon_info(info, argp);
3895                 break;
3896         case CYGETTHRESH:
3897                 ret_val = get_threshold(info, argp);
3898                 break;
3899         case CYSETTHRESH:
3900                 ret_val = set_threshold(info, arg);
3901                 break;
3902         case CYGETDEFTHRESH:
3903                 ret_val = get_default_threshold(info, argp);
3904                 break;
3905         case CYSETDEFTHRESH:
3906                 ret_val = set_default_threshold(info, arg);
3907                 break;
3908         case CYGETTIMEOUT:
3909                 ret_val = get_timeout(info, argp);
3910                 break;
3911         case CYSETTIMEOUT:
3912                 ret_val = set_timeout(info, arg);
3913                 break;
3914         case CYGETDEFTIMEOUT:
3915                 ret_val = get_default_timeout(info, argp);
3916                 break;
3917         case CYSETDEFTIMEOUT:
3918                 ret_val = set_default_timeout(info, arg);
3919                 break;
3920         case CYSETRFLOW:
3921                 info->rflow = (int)arg;
3922                 ret_val = 0;
3923                 break;
3924         case CYGETRFLOW:
3925                 ret_val = info->rflow;
3926                 break;
3927         case CYSETRTSDTR_INV:
3928                 info->rtsdtr_inv = (int)arg;
3929                 ret_val = 0;
3930                 break;
3931         case CYGETRTSDTR_INV:
3932                 ret_val = info->rtsdtr_inv;
3933                 break;
3934         case CYGETCD1400VER:
3935                 ret_val = info->chip_rev;
3936                 break;
3937 #ifndef CONFIG_CYZ_INTR
3938         case CYZSETPOLLCYCLE:
3939                 cyz_polling_cycle = (arg * HZ) / 1000;
3940                 ret_val = 0;
3941                 break;
3942         case CYZGETPOLLCYCLE:
3943                 ret_val = (cyz_polling_cycle * 1000) / HZ;
3944                 break;
3945 #endif                          /* CONFIG_CYZ_INTR */
3946         case CYSETWAIT:
3947                 info->port.closing_wait = (unsigned short)arg * HZ / 100;
3948                 ret_val = 0;
3949                 break;
3950         case CYGETWAIT:
3951                 ret_val = info->port.closing_wait / (HZ / 100);
3952                 break;
3953         case TIOCGSERIAL:
3954                 ret_val = get_serial_info(info, argp);
3955                 break;
3956         case TIOCSSERIAL:
3957                 ret_val = set_serial_info(info, argp);
3958                 break;
3959         case TIOCSERGETLSR:     /* Get line status register */
3960                 ret_val = get_lsr_info(info, argp);
3961                 break;
3962                 /*
3963                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3964                  * - mask passed in arg for lines of interest
3965                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3966                  * Caller should use TIOCGICOUNT to see which one it was
3967                  */
3968         case TIOCMIWAIT:
3969                 spin_lock_irqsave(&info->card->card_lock, flags);
3970                 /* note the counters on entry */
3971                 cnow = info->icount;
3972                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3973                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3974                         cprev = cnow;
3975                         spin_lock_irqsave(&info->card->card_lock, flags);
3976                         cnow = info->icount;    /* atomic copy */
3977                         spin_unlock_irqrestore(&info->card->card_lock, flags);
3978
3979                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3980                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3981                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
3982                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3983                 }));
3984                 break;
3985
3986                 /*
3987                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3988                  * Return: write counters to the user passed counter struct
3989                  * NB: both 1->0 and 0->1 transitions are counted except for
3990                  *     RI where only 0->1 is counted.
3991                  */
3992         case TIOCGICOUNT:
3993                 spin_lock_irqsave(&info->card->card_lock, flags);
3994                 cnow = info->icount;
3995                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3996                 p_cuser = argp;
3997                 ret_val = put_user(cnow.cts, &p_cuser->cts);
3998                 if (ret_val)
3999                         break;
4000                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4001                 if (ret_val)
4002                         break;
4003                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4004                 if (ret_val)
4005                         break;
4006                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4007                 if (ret_val)
4008                         break;
4009                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4010                 if (ret_val)
4011                         break;
4012                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4013                 if (ret_val)
4014                         break;
4015                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4016                 if (ret_val)
4017                         break;
4018                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4019                 if (ret_val)
4020                         break;
4021                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4022                 if (ret_val)
4023                         break;
4024                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4025                 if (ret_val)
4026                         break;
4027                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4028                 if (ret_val)
4029                         break;
4030                 ret_val = 0;
4031                 break;
4032         default:
4033                 ret_val = -ENOIOCTLCMD;
4034         }
4035         unlock_kernel();
4036
4037 #ifdef CY_DEBUG_OTHER
4038         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4039 #endif
4040         return ret_val;
4041 }                               /* cy_ioctl */
4042
4043 /*
4044  * This routine allows the tty driver to be notified when
4045  * device's termios settings have changed.  Note that a
4046  * well-designed tty driver should be prepared to accept the case
4047  * where old == NULL, and try to do something rational.
4048  */
4049 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4050 {
4051         struct cyclades_port *info = tty->driver_data;
4052
4053 #ifdef CY_DEBUG_OTHER
4054         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4055 #endif
4056
4057         set_line_char(info);
4058
4059         if ((old_termios->c_cflag & CRTSCTS) &&
4060                         !(tty->termios->c_cflag & CRTSCTS)) {
4061                 tty->hw_stopped = 0;
4062                 cy_start(tty);
4063         }
4064 #if 0
4065         /*
4066          * No need to wake up processes in open wait, since they
4067          * sample the CLOCAL flag once, and don't recheck it.
4068          * XXX  It's not clear whether the current behavior is correct
4069          * or not.  Hence, this may change.....
4070          */
4071         if (!(old_termios->c_cflag & CLOCAL) &&
4072             (tty->termios->c_cflag & CLOCAL))
4073                 wake_up_interruptible(&info->port.open_wait);
4074 #endif
4075 }                               /* cy_set_termios */
4076
4077 /* This function is used to send a high-priority XON/XOFF character to
4078    the device.
4079 */
4080 static void cy_send_xchar(struct tty_struct *tty, char ch)
4081 {
4082         struct cyclades_port *info = tty->driver_data;
4083         struct cyclades_card *card;
4084         int channel;
4085
4086         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4087                 return;
4088
4089         info->x_char = ch;
4090
4091         if (ch)
4092                 cy_start(tty);
4093
4094         card = info->card;
4095         channel = info->line - card->first_line;
4096
4097         if (cy_is_Z(card)) {
4098                 if (ch == STOP_CHAR(tty))
4099                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4100                 else if (ch == START_CHAR(tty))
4101                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4102         }
4103 }
4104
4105 /* This routine is called by the upper-layer tty layer to signal
4106    that incoming characters should be throttled because the input
4107    buffers are close to full.
4108  */
4109 static void cy_throttle(struct tty_struct *tty)
4110 {
4111         struct cyclades_port *info = tty->driver_data;
4112         struct cyclades_card *card;
4113         unsigned long flags;
4114         void __iomem *base_addr;
4115         int chip, channel, index;
4116
4117 #ifdef CY_DEBUG_THROTTLE
4118         char buf[64];
4119
4120         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4121                         tty->ldisc.chars_in_buffer(tty), info->line);
4122 #endif
4123
4124         if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4125                 return;
4126
4127         card = info->card;
4128
4129         if (I_IXOFF(tty)) {
4130                 if (!cy_is_Z(card))
4131                         cy_send_xchar(tty, STOP_CHAR(tty));
4132                 else
4133                         info->throttle = 1;
4134         }
4135
4136         if (tty->termios->c_cflag & CRTSCTS) {
4137                 channel = info->line - card->first_line;
4138                 if (!cy_is_Z(card)) {
4139                         chip = channel >> 2;
4140                         channel &= 0x03;
4141                         index = card->bus_index;
4142                         base_addr = card->base_addr +
4143                                 (cy_chip_offset[chip] << index);
4144
4145                         spin_lock_irqsave(&card->card_lock, flags);
4146                         cy_writeb(base_addr + (CyCAR << index),
4147                                   (u_char) channel);
4148                         if (info->rtsdtr_inv) {
4149                                 cy_writeb(base_addr + (CyMSVR2 << index),
4150                                           ~CyDTR);
4151                         } else {
4152                                 cy_writeb(base_addr + (CyMSVR1 << index),
4153                                           ~CyRTS);
4154                         }
4155                         spin_unlock_irqrestore(&card->card_lock, flags);
4156                 } else {
4157                         info->throttle = 1;
4158                 }
4159         }
4160 }                               /* cy_throttle */
4161
4162 /*
4163  * This routine notifies the tty driver that it should signal
4164  * that characters can now be sent to the tty without fear of
4165  * overrunning the input buffers of the line disciplines.
4166  */
4167 static void cy_unthrottle(struct tty_struct *tty)
4168 {
4169         struct cyclades_port *info = tty->driver_data;
4170         struct cyclades_card *card;
4171         unsigned long flags;
4172         void __iomem *base_addr;
4173         int chip, channel, index;
4174
4175 #ifdef CY_DEBUG_THROTTLE
4176         char buf[64];
4177
4178         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4179                 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4180 #endif
4181
4182         if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4183                 return;
4184
4185         if (I_IXOFF(tty)) {
4186                 if (info->x_char)
4187                         info->x_char = 0;
4188                 else
4189                         cy_send_xchar(tty, START_CHAR(tty));
4190         }
4191
4192         if (tty->termios->c_cflag & CRTSCTS) {
4193                 card = info->card;
4194                 channel = info->line - card->first_line;
4195                 if (!cy_is_Z(card)) {
4196                         chip = channel >> 2;
4197                         channel &= 0x03;
4198                         index = card->bus_index;
4199                         base_addr = card->base_addr +
4200                                 (cy_chip_offset[chip] << index);
4201
4202                         spin_lock_irqsave(&card->card_lock, flags);
4203                         cy_writeb(base_addr + (CyCAR << index),
4204                                   (u_char) channel);
4205                         if (info->rtsdtr_inv) {
4206                                 cy_writeb(base_addr + (CyMSVR2 << index),
4207                                           CyDTR);
4208                         } else {
4209                                 cy_writeb(base_addr + (CyMSVR1 << index),
4210                                           CyRTS);
4211                         }
4212                         spin_unlock_irqrestore(&card->card_lock, flags);
4213                 } else {
4214                         info->throttle = 0;
4215                 }
4216         }
4217 }                               /* cy_unthrottle */
4218
4219 /* cy_start and cy_stop provide software output flow control as a
4220    function of XON/XOFF, software CTS, and other such stuff.
4221 */
4222 static void cy_stop(struct tty_struct *tty)
4223 {
4224         struct cyclades_card *cinfo;
4225         struct cyclades_port *info = tty->driver_data;
4226         void __iomem *base_addr;
4227         int chip, channel, index;
4228         unsigned long flags;
4229
4230 #ifdef CY_DEBUG_OTHER
4231         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4232 #endif
4233
4234         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4235                 return;
4236
4237         cinfo = info->card;
4238         channel = info->line - cinfo->first_line;
4239         if (!cy_is_Z(cinfo)) {
4240                 index = cinfo->bus_index;
4241                 chip = channel >> 2;
4242                 channel &= 0x03;
4243                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4244
4245                 spin_lock_irqsave(&cinfo->card_lock, flags);
4246                 cy_writeb(base_addr + (CyCAR << index),
4247                         (u_char)(channel & 0x0003)); /* index channel */
4248                 cy_writeb(base_addr + (CySRER << index),
4249                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4250                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4251         }
4252 }                               /* cy_stop */
4253
4254 static void cy_start(struct tty_struct *tty)
4255 {
4256         struct cyclades_card *cinfo;
4257         struct cyclades_port *info = tty->driver_data;
4258         void __iomem *base_addr;
4259         int chip, channel, index;
4260         unsigned long flags;
4261
4262 #ifdef CY_DEBUG_OTHER
4263         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4264 #endif
4265
4266         if (serial_paranoia_check(info, tty->name, "cy_start"))
4267                 return;
4268
4269         cinfo = info->card;
4270         channel = info->line - cinfo->first_line;
4271         index = cinfo->bus_index;
4272         if (!cy_is_Z(cinfo)) {
4273                 chip = channel >> 2;
4274                 channel &= 0x03;
4275                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4276
4277                 spin_lock_irqsave(&cinfo->card_lock, flags);
4278                 cy_writeb(base_addr + (CyCAR << index),
4279                         (u_char) (channel & 0x0003));   /* index channel */
4280                 cy_writeb(base_addr + (CySRER << index),
4281                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4282                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4283         }
4284 }                               /* cy_start */
4285
4286 /*
4287  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4288  */
4289 static void cy_hangup(struct tty_struct *tty)
4290 {
4291         struct cyclades_port *info = tty->driver_data;
4292
4293 #ifdef CY_DEBUG_OTHER
4294         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4295 #endif
4296
4297         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4298                 return;
4299
4300         cy_flush_buffer(tty);
4301         shutdown(info);
4302         info->port.count = 0;
4303 #ifdef CY_DEBUG_COUNT
4304         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4305                 current->pid);
4306 #endif
4307         info->port.tty = NULL;
4308         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4309         wake_up_interruptible(&info->port.open_wait);
4310 }                               /* cy_hangup */
4311
4312 /*
4313  * ---------------------------------------------------------------------
4314  * cy_init() and friends
4315  *
4316  * cy_init() is called at boot-time to initialize the serial driver.
4317  * ---------------------------------------------------------------------
4318  */
4319
4320 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4321 {
4322         struct cyclades_port *info;
4323         unsigned int port;
4324         unsigned short chip_number;
4325
4326         spin_lock_init(&cinfo->card_lock);
4327         cinfo->intr_enabled = 0;
4328
4329         cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
4330                         GFP_KERNEL);
4331         if (cinfo->ports == NULL) {
4332                 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4333                 return -ENOMEM;
4334         }
4335
4336         for (port = cinfo->first_line; port < cinfo->first_line + cinfo->nports;
4337                         port++) {
4338                 info = &cinfo->ports[port - cinfo->first_line];
4339                 tty_port_init(&info->port);
4340                 info->magic = CYCLADES_MAGIC;
4341                 info->card = cinfo;
4342                 info->line = port;
4343
4344                 info->port.closing_wait = CLOSING_WAIT_DELAY;
4345                 info->port.close_delay = 5 * HZ / 10;
4346                 info->port.flags = STD_COM_FLAGS;
4347                 init_completion(&info->shutdown_wait);
4348                 init_waitqueue_head(&info->delta_msr_wait);
4349
4350                 if (cy_is_Z(cinfo)) {
4351                         info->type = PORT_STARTECH;
4352                         if (cinfo->hw_ver == ZO_V1)
4353                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4354                         else
4355                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4356 #ifdef CONFIG_CYZ_INTR
4357                         setup_timer(&cyz_rx_full_timer[port],
4358                                 cyz_rx_restart, (unsigned long)info);
4359 #endif
4360                 } else {
4361                         int index = cinfo->bus_index;
4362                         info->type = PORT_CIRRUS;
4363                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4364                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4365                         info->cor2 = CyETC;
4366                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4367
4368                         chip_number = (port - cinfo->first_line) / 4;
4369                         info->chip_rev = readb(cinfo->base_addr +
4370                                       (cy_chip_offset[chip_number] << index) +
4371                                       (CyGFRCR << index));
4372
4373                         if (info->chip_rev >= CD1400_REV_J) {
4374                                 /* It is a CD1400 rev. J or later */
4375                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4376                                 info->tco = baud_co_60[13];     /* Tx CO */
4377                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4378                                 info->rco = baud_co_60[13];     /* Rx CO */
4379                                 info->rtsdtr_inv = 1;
4380                         } else {
4381                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4382                                 info->tco = baud_co_25[13];     /* Tx CO */
4383                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4384                                 info->rco = baud_co_25[13];     /* Rx CO */
4385                                 info->rtsdtr_inv = 0;
4386                         }
4387                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4388                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4389                 }
4390
4391         }
4392
4393 #ifndef CONFIG_CYZ_INTR
4394         if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
4395                 mod_timer(&cyz_timerlist, jiffies + 1);
4396 #ifdef CY_PCI_DEBUG
4397                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4398 #endif
4399         }
4400 #endif
4401         return 0;
4402 }
4403
4404 /* initialize chips on Cyclom-Y card -- return number of valid
4405    chips (which is number of ports/4) */
4406 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4407                 int index)
4408 {
4409         unsigned int chip_number;
4410         void __iomem *base_addr;
4411
4412         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4413         /* Cy_HwReset is 0x1400 */
4414         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4415         /* Cy_ClrIntr is 0x1800 */
4416         udelay(500L);
4417
4418         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4419                                                         chip_number++) {
4420                 base_addr =
4421                     true_base_addr + (cy_chip_offset[chip_number] << index);
4422                 mdelay(1);
4423                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4424                         /*************
4425                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4426                         chip_number, (unsigned long)base_addr);
4427                         *************/
4428                         return chip_number;
4429                 }
4430
4431                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4432                 udelay(10L);
4433
4434                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4435                    cannot distinguish between references to chip 0 and a non-
4436                    existent chip 4.  If the preceding clearing of the supposed
4437                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4438                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4439                  */
4440                 if (chip_number == 4 && readb(true_base_addr +
4441                                 (cy_chip_offset[0] << index) +
4442                                 (CyGFRCR << index)) == 0) {
4443                         return chip_number;
4444                 }
4445
4446                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4447                 mdelay(1);
4448
4449                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4450                         /*
4451                            printk(" chip #%d at %#6lx is not responding ",
4452                            chip_number, (unsigned long)base_addr);
4453                            printk("(GFRCR stayed 0)\n",
4454                          */
4455                         return chip_number;
4456                 }
4457                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4458                                 0x40) {
4459                         /*
4460                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4461                                         "%#2x)\n",
4462                                         chip_number, (unsigned long)base_addr,
4463                                         base_addr[CyGFRCR<<index]);
4464                          */
4465                         return chip_number;
4466                 }
4467                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4468                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4469                         /* It is a CD1400 rev. J or later */
4470                         /* Impossible to reach 5ms with this chip.
4471                            Changed to 2ms instead (f = 500 Hz). */
4472                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4473                 } else {
4474                         /* f = 200 Hz */
4475                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4476                 }
4477
4478                 /*
4479                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4480                    chip_number, (unsigned long)base_addr,
4481                    readb(base_addr+(CyGFRCR<<index)));
4482                  */
4483         }
4484         return chip_number;
4485 }                               /* cyy_init_card */
4486
4487 /*
4488  * ---------------------------------------------------------------------
4489  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4490  * sets global variables and return the number of ISA boards found.
4491  * ---------------------------------------------------------------------
4492  */
4493 static int __init cy_detect_isa(void)
4494 {
4495 #ifdef CONFIG_ISA
4496         unsigned short cy_isa_irq, nboard;
4497         void __iomem *cy_isa_address;
4498         unsigned short i, j, cy_isa_nchan;
4499 #ifdef MODULE
4500         int isparam = 0;
4501 #endif
4502
4503         nboard = 0;
4504
4505 #ifdef MODULE
4506         /* Check for module parameters */
4507         for (i = 0; i < NR_CARDS; i++) {
4508                 if (maddr[i] || i) {
4509                         isparam = 1;
4510                         cy_isa_addresses[i] = maddr[i];
4511                 }
4512                 if (!maddr[i])
4513                         break;
4514         }
4515 #endif
4516
4517         /* scan the address table probing for Cyclom-Y/ISA boards */
4518         for (i = 0; i < NR_ISA_ADDRS; i++) {
4519                 unsigned int isa_address = cy_isa_addresses[i];
4520                 if (isa_address == 0x0000)
4521                         return nboard;
4522
4523                 /* probe for CD1400... */
4524                 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
4525                 if (cy_isa_address == NULL) {
4526                         printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4527                                         "address\n");
4528                         continue;
4529                 }
4530                 cy_isa_nchan = CyPORTS_PER_CHIP *
4531                         cyy_init_card(cy_isa_address, 0);
4532                 if (cy_isa_nchan == 0) {
4533                         iounmap(cy_isa_address);
4534                         continue;
4535                 }
4536 #ifdef MODULE
4537                 if (isparam && irq[i])
4538                         cy_isa_irq = irq[i];
4539                 else
4540 #endif
4541                         /* find out the board's irq by probing */
4542                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4543                 if (cy_isa_irq == 0) {
4544                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4545                                 "IRQ could not be detected.\n",
4546                                 (unsigned long)cy_isa_address);
4547                         iounmap(cy_isa_address);
4548                         continue;
4549                 }
4550
4551                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4552                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4553                                 "more channels are available. Change NR_PORTS "
4554                                 "in cyclades.c and recompile kernel.\n",
4555                                 (unsigned long)cy_isa_address);
4556                         iounmap(cy_isa_address);
4557                         return nboard;
4558                 }
4559                 /* fill the next cy_card structure available */
4560                 for (j = 0; j < NR_CARDS; j++) {
4561                         if (cy_card[j].base_addr == NULL)
4562                                 break;
4563                 }
4564                 if (j == NR_CARDS) {    /* no more cy_cards available */
4565                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4566                                 "more cards can be used. Change NR_CARDS in "
4567                                 "cyclades.c and recompile kernel.\n",
4568                                 (unsigned long)cy_isa_address);
4569                         iounmap(cy_isa_address);
4570                         return nboard;
4571                 }
4572
4573                 /* allocate IRQ */
4574                 if (request_irq(cy_isa_irq, cyy_interrupt,
4575                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4576                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4577                                 "could not allocate IRQ#%d.\n",
4578                                 (unsigned long)cy_isa_address, cy_isa_irq);
4579                         iounmap(cy_isa_address);
4580                         return nboard;
4581                 }
4582
4583                 /* set cy_card */
4584                 cy_card[j].base_addr = cy_isa_address;
4585                 cy_card[j].ctl_addr.p9050 = NULL;
4586                 cy_card[j].irq = (int)cy_isa_irq;
4587                 cy_card[j].bus_index = 0;
4588                 cy_card[j].first_line = cy_next_channel;
4589                 cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
4590                 cy_card[j].nports = cy_isa_nchan;
4591                 if (cy_init_card(&cy_card[j])) {
4592                         cy_card[j].base_addr = NULL;
4593                         free_irq(cy_isa_irq, &cy_card[j]);
4594                         iounmap(cy_isa_address);
4595                         continue;
4596                 }
4597                 nboard++;
4598
4599                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4600                         "%d channels starting from port %d\n",
4601                         j + 1, (unsigned long)cy_isa_address,
4602                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4603                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4604
4605                 for (j = cy_next_channel;
4606                                 j < cy_next_channel + cy_isa_nchan; j++)
4607                         tty_register_device(cy_serial_driver, j, NULL);
4608                 cy_next_channel += cy_isa_nchan;
4609         }
4610         return nboard;
4611 #else
4612         return 0;
4613 #endif                          /* CONFIG_ISA */
4614 }                               /* cy_detect_isa */
4615
4616 #ifdef CONFIG_PCI
4617 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4618 {
4619         unsigned int a;
4620
4621         for (a = 0; a < size && *str; a++, str++)
4622                 if (*str & 0x80)
4623                         return -EINVAL;
4624
4625         for (; a < size; a++, str++)
4626                 if (*str)
4627                         return -EINVAL;
4628
4629         return 0;
4630 }
4631
4632 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
4633                 unsigned int size)
4634 {
4635         for (; size > 0; size--) {
4636                 cy_writel(fpga, *data++);
4637                 udelay(10);
4638         }
4639 }
4640
4641 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4642                 struct RUNTIME_9060 __iomem *addr)
4643 {
4644         /* Reset PLX */
4645         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4646         udelay(100L);
4647         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4648
4649         /* Reload Config. Registers from EEPROM */
4650         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4651         udelay(100L);
4652         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4653
4654         /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4655          * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4656          * registers. This will remain here until we find a permanent fix.
4657          */
4658         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4659 }
4660
4661 static int __devinit __cyz_load_fw(const struct firmware *fw,
4662                 const char *name, const u32 mailbox, void __iomem *base,
4663                 void __iomem *fpga)
4664 {
4665         const void *ptr = fw->data;
4666         const struct zfile_header *h = ptr;
4667         const struct zfile_config *c, *cs;
4668         const struct zfile_block *b, *bs;
4669         unsigned int a, tmp, len = fw->size;
4670 #define BAD_FW KERN_ERR "Bad firmware: "
4671         if (len < sizeof(*h)) {
4672                 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4673                 return -EINVAL;
4674         }
4675
4676         cs = ptr + h->config_offset;
4677         bs = ptr + h->block_offset;
4678
4679         if ((void *)(cs + h->n_config) > ptr + len ||
4680                         (void *)(bs + h->n_blocks) > ptr + len) {
4681                 printk(BAD_FW "too short");
4682                 return  -EINVAL;
4683         }
4684
4685         if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4686                         cyc_isfwstr(h->date, sizeof(h->date))) {
4687                 printk(BAD_FW "bad formatted header string\n");
4688                 return -EINVAL;
4689         }
4690
4691         if (strncmp(name, h->name, sizeof(h->name))) {
4692                 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4693                 return -EINVAL;
4694         }
4695
4696         tmp = 0;
4697         for (c = cs; c < cs + h->n_config; c++) {
4698                 for (a = 0; a < c->n_blocks; a++)
4699                         if (c->block_list[a] > h->n_blocks) {
4700                                 printk(BAD_FW "bad block ref number in cfgs\n");
4701                                 return -EINVAL;
4702                         }
4703                 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4704                         tmp++;
4705         }
4706         if (!tmp) {
4707                 printk(BAD_FW "nothing appropriate\n");
4708                 return -EINVAL;
4709         }
4710
4711         for (b = bs; b < bs + h->n_blocks; b++)
4712                 if (b->file_offset + b->size > len) {
4713                         printk(BAD_FW "bad block data offset\n");
4714                         return -EINVAL;
4715                 }
4716
4717         /* everything is OK, let's seek'n'load it */
4718         for (c = cs; c < cs + h->n_config; c++)
4719                 if (c->mailbox == mailbox && c->function == 0)
4720                         break;
4721
4722         for (a = 0; a < c->n_blocks; a++) {
4723                 b = &bs[c->block_list[a]];
4724                 if (b->type == ZBLOCK_FPGA) {
4725                         if (fpga != NULL)
4726                                 cyz_fpga_copy(fpga, ptr + b->file_offset,
4727                                                 b->size);
4728                 } else {
4729                         if (base != NULL)
4730                                 memcpy_toio(base + b->ram_offset,
4731                                                ptr + b->file_offset, b->size);
4732                 }
4733         }
4734 #undef BAD_FW
4735         return 0;
4736 }
4737
4738 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4739                 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4740 {
4741         const struct firmware *fw;
4742         struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4743         struct CUSTOM_REG __iomem *cust = base_addr;
4744         struct ZFW_CTRL __iomem *pt_zfwctrl;
4745         void __iomem *tmp;
4746         u32 mailbox, status, nchan;
4747         unsigned int i;
4748         int retval;
4749
4750         retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4751         if (retval) {
4752                 dev_err(&pdev->dev, "can't get firmware\n");
4753                 goto err;
4754         }
4755
4756         /* Check whether the firmware is already loaded and running. If
4757            positive, skip this board */
4758         if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4759                 u32 cntval = readl(base_addr + 0x190);
4760
4761                 udelay(100);
4762                 if (cntval != readl(base_addr + 0x190)) {
4763                         /* FW counter is working, FW is running */
4764                         dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4765                                         "Skipping board.\n");
4766                         retval = 0;
4767                         goto err_rel;
4768                 }
4769         }
4770
4771         /* start boot */
4772         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4773                         ~0x00030800UL);
4774
4775         mailbox = readl(&ctl_addr->mail_box_0);
4776
4777         if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
4778                 /* stops CPU and set window to beginning of RAM */
4779                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4780                 cy_writel(&cust->cpu_stop, 0);
4781                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4782                 udelay(100);
4783         }
4784
4785         plx_init(pdev, irq, ctl_addr);
4786
4787         if (mailbox != 0) {
4788                 /* load FPGA */
4789                 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4790                                 base_addr);
4791                 if (retval)
4792                         goto err_rel;
4793                 if (!__cyz_fpga_loaded(ctl_addr)) {
4794                         dev_err(&pdev->dev, "fw upload successful, but fw is "
4795                                         "not loaded\n");
4796                         goto err_rel;
4797                 }
4798         }
4799
4800         /* stops CPU and set window to beginning of RAM */
4801         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4802         cy_writel(&cust->cpu_stop, 0);
4803         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4804         udelay(100);
4805
4806         /* clear memory */
4807         for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4808                 cy_writeb(tmp, 255);
4809         if (mailbox != 0) {
4810                 /* set window to last 512K of RAM */
4811                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4812                 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4813                         cy_writeb(tmp, 255);
4814                 /* set window to beginning of RAM */
4815                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4816         }
4817
4818         retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4819         release_firmware(fw);
4820         if (retval)
4821                 goto err;
4822
4823         /* finish boot and start boards */
4824         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4825         cy_writel(&cust->cpu_start, 0);
4826         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4827         i = 0;
4828         while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4829                 msleep(100);
4830         if (status != ZFIRM_ID) {
4831                 if (status == ZFIRM_HLT) {
4832                         dev_err(&pdev->dev, "you need an external power supply "
4833                                 "for this number of ports. Firmware halted and "
4834                                 "board reset.\n");
4835                         retval = -EIO;
4836                         goto err;
4837                 }
4838                 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4839                                 "some more time\n", status);
4840                 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4841                                 i++ < 200)
4842                         msleep(100);
4843                 if (status != ZFIRM_ID) {
4844                         dev_err(&pdev->dev, "Board not started in 20 seconds! "
4845                                         "Giving up. (fid->signature = 0x%x)\n",
4846                                         status);
4847                         dev_info(&pdev->dev, "*** Warning ***: if you are "
4848                                 "upgrading the FW, please power cycle the "
4849                                 "system before loading the new FW to the "
4850                                 "Cyclades-Z.\n");
4851
4852                         if (__cyz_fpga_loaded(ctl_addr))
4853                                 plx_init(pdev, irq, ctl_addr);
4854
4855                         retval = -EIO;
4856                         goto err;
4857                 }
4858                 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4859                                 i / 10);
4860         }
4861         pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4862
4863         dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4864                         base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4865                         base_addr + readl(&fid->zfwctrl_addr));
4866
4867         nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
4868         dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4869                 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
4870
4871         if (nchan == 0) {
4872                 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4873                         "check the connection between the Z host card and the "
4874                         "serial expanders.\n");
4875
4876                 if (__cyz_fpga_loaded(ctl_addr))
4877                         plx_init(pdev, irq, ctl_addr);
4878
4879                 dev_info(&pdev->dev, "Null number of ports detected. Board "
4880                                 "reset.\n");
4881                 retval = 0;
4882                 goto err;
4883         }
4884
4885         cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4886         cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4887
4888         /*
4889            Early firmware failed to start looking for commands.
4890            This enables firmware interrupts for those commands.
4891          */
4892         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4893                         (1 << 17));
4894         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4895                         0x00030800UL);
4896
4897         return nchan;
4898 err_rel:
4899         release_firmware(fw);
4900 err:
4901         return retval;
4902 }
4903
4904 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4905                 const struct pci_device_id *ent)
4906 {
4907         void __iomem *addr0 = NULL, *addr2 = NULL;
4908         char *card_name = NULL;
4909         u32 uninitialized_var(mailbox);
4910         unsigned int device_id, nchan = 0, card_no, i;
4911         unsigned char plx_ver;
4912         int retval, irq;
4913
4914         retval = pci_enable_device(pdev);
4915         if (retval) {
4916                 dev_err(&pdev->dev, "cannot enable device\n");
4917                 goto err;
4918         }
4919
4920         /* read PCI configuration area */
4921         irq = pdev->irq;
4922         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4923
4924 #if defined(__alpha__)
4925         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4926                 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4927                         "addresses on Alpha systems.\n");
4928                 retval = -EIO;
4929                 goto err_dis;
4930         }
4931 #endif
4932         if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4933                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4934                         "addresses\n");
4935                 retval = -EIO;
4936                 goto err_dis;
4937         }
4938
4939         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4940                 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4941                                 "it...\n");
4942                 pdev->resource[2].flags &= ~IORESOURCE_IO;
4943         }
4944
4945         retval = pci_request_regions(pdev, "cyclades");
4946         if (retval) {
4947                 dev_err(&pdev->dev, "failed to reserve resources\n");
4948                 goto err_dis;
4949         }
4950
4951         retval = -EIO;
4952         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4953                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4954                 card_name = "Cyclom-Y";
4955
4956                 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4957                                 CyPCI_Yctl);
4958                 if (addr0 == NULL) {
4959                         dev_err(&pdev->dev, "can't remap ctl region\n");
4960                         goto err_reg;
4961                 }
4962                 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4963                                 CyPCI_Ywin);
4964                 if (addr2 == NULL) {
4965                         dev_err(&pdev->dev, "can't remap base region\n");
4966                         goto err_unmap;
4967                 }
4968
4969                 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
4970                 if (nchan == 0) {
4971                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4972                                         "Serial-Modules\n");
4973                         goto err_unmap;
4974                 }
4975         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4976                 struct RUNTIME_9060 __iomem *ctl_addr;
4977
4978                 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4979                                 CyPCI_Zctl);
4980                 if (addr0 == NULL) {
4981                         dev_err(&pdev->dev, "can't remap ctl region\n");
4982                         goto err_reg;
4983                 }
4984
4985                 /* Disable interrupts on the PLX before resetting it */
4986                 cy_writew(&ctl_addr->intr_ctrl_stat,
4987                                 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
4988
4989                 plx_init(pdev, irq, addr0);
4990
4991                 mailbox = readl(&ctl_addr->mail_box_0);
4992
4993                 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4994                                 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
4995                 if (addr2 == NULL) {
4996                         dev_err(&pdev->dev, "can't remap base region\n");
4997                         goto err_unmap;
4998                 }
4999
5000                 if (mailbox == ZE_V1) {
5001                         card_name = "Cyclades-Ze";
5002                 } else {
5003                         card_name = "Cyclades-8Zo";
5004 #ifdef CY_PCI_DEBUG
5005                         if (mailbox == ZO_V1) {
5006                                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5007                                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5008                                         "id %lx, ver %lx\n", (ulong)(0xff &
5009                                         readl(&((struct CUSTOM_REG *)addr2)->
5010                                                 fpga_id)), (ulong)(0xff &
5011                                         readl(&((struct CUSTOM_REG *)addr2)->
5012                                                 fpga_version)));
5013                                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5014                         } else {
5015                                 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5016                                         "Cyclades-Z board.  FPGA not loaded\n");
5017                         }
5018 #endif
5019                         /* The following clears the firmware id word.  This
5020                            ensures that the driver will not attempt to talk to
5021                            the board until it has been properly initialized.
5022                          */
5023                         if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5024                                 cy_writel(addr2 + ID_ADDRESS, 0L);
5025                 }
5026
5027                 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5028                 if (retval <= 0)
5029                         goto err_unmap;
5030                 nchan = retval;
5031         }
5032
5033         if ((cy_next_channel + nchan) > NR_PORTS) {
5034                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5035                         "channels are available. Change NR_PORTS in "
5036                         "cyclades.c and recompile kernel.\n");
5037                 goto err_unmap;
5038         }
5039         /* fill the next cy_card structure available */
5040         for (card_no = 0; card_no < NR_CARDS; card_no++) {
5041                 if (cy_card[card_no].base_addr == NULL)
5042                         break;
5043         }
5044         if (card_no == NR_CARDS) {      /* no more cy_cards available */
5045                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5046                         "more cards can be used. Change NR_CARDS in "
5047                         "cyclades.c and recompile kernel.\n");
5048                 goto err_unmap;
5049         }
5050
5051         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5052                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5053                 /* allocate IRQ */
5054                 retval = request_irq(irq, cyy_interrupt,
5055                                 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5056                 if (retval) {
5057                         dev_err(&pdev->dev, "could not allocate IRQ\n");
5058                         goto err_unmap;
5059                 }
5060                 cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
5061         } else {
5062                 cy_card[card_no].hw_ver = mailbox;
5063                 cy_card[card_no].num_chips = (unsigned int)-1;
5064 #ifdef CONFIG_CYZ_INTR
5065                 /* allocate IRQ only if board has an IRQ */
5066                 if (irq != 0 && irq != 255) {
5067                         retval = request_irq(irq, cyz_interrupt,
5068                                         IRQF_SHARED, "Cyclades-Z",
5069                                         &cy_card[card_no]);
5070                         if (retval) {
5071                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5072                                 goto err_unmap;
5073                         }
5074                 }
5075 #endif                          /* CONFIG_CYZ_INTR */
5076         }
5077
5078         /* set cy_card */
5079         cy_card[card_no].base_addr = addr2;
5080         cy_card[card_no].ctl_addr.p9050 = addr0;
5081         cy_card[card_no].irq = irq;
5082         cy_card[card_no].bus_index = 1;
5083         cy_card[card_no].first_line = cy_next_channel;
5084         cy_card[card_no].nports = nchan;
5085         retval = cy_init_card(&cy_card[card_no]);
5086         if (retval)
5087                 goto err_null;
5088
5089         pci_set_drvdata(pdev, &cy_card[card_no]);
5090
5091         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5092                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5093                 /* enable interrupts in the PCI interface */
5094                 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5095                 switch (plx_ver) {
5096                 case PLX_9050:
5097                         cy_writeb(addr0 + 0x4c, 0x43);
5098                         break;
5099
5100                 case PLX_9060:
5101                 case PLX_9080:
5102                 default:        /* Old boards, use PLX_9060 */
5103                 {
5104                         struct RUNTIME_9060 __iomem *ctl_addr = addr0;
5105                         plx_init(pdev, irq, ctl_addr);
5106                         cy_writew(&ctl_addr->intr_ctrl_stat,
5107                                 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
5108                         break;
5109                 }
5110                 }
5111         }
5112
5113         dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5114                 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5115         for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5116                 tty_register_device(cy_serial_driver, i, &pdev->dev);
5117         cy_next_channel += nchan;
5118
5119         return 0;
5120 err_null:
5121         cy_card[card_no].base_addr = NULL;
5122         free_irq(irq, &cy_card[card_no]);
5123 err_unmap:
5124         iounmap(addr0);
5125         if (addr2)
5126                 iounmap(addr2);
5127 err_reg:
5128         pci_release_regions(pdev);
5129 err_dis:
5130         pci_disable_device(pdev);
5131 err:
5132         return retval;
5133 }
5134
5135 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5136 {
5137         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5138         unsigned int i;
5139
5140         /* non-Z with old PLX */
5141         if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5142                         PLX_9050)
5143                 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
5144         else
5145 #ifndef CONFIG_CYZ_INTR
5146                 if (!cy_is_Z(cinfo))
5147 #endif
5148                 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
5149                         readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
5150                         ~0x0900);
5151
5152         iounmap(cinfo->base_addr);
5153         if (cinfo->ctl_addr.p9050)
5154                 iounmap(cinfo->ctl_addr.p9050);
5155         if (cinfo->irq
5156 #ifndef CONFIG_CYZ_INTR
5157                 && !cy_is_Z(cinfo)
5158 #endif /* CONFIG_CYZ_INTR */
5159                 )
5160                 free_irq(cinfo->irq, cinfo);
5161         pci_release_regions(pdev);
5162
5163         cinfo->base_addr = NULL;
5164         for (i = cinfo->first_line; i < cinfo->first_line +
5165                         cinfo->nports; i++)
5166                 tty_unregister_device(cy_serial_driver, i);
5167         cinfo->nports = 0;
5168         kfree(cinfo->ports);
5169 }
5170
5171 static struct pci_driver cy_pci_driver = {
5172         .name = "cyclades",
5173         .id_table = cy_pci_dev_id,
5174         .probe = cy_pci_probe,
5175         .remove = __devexit_p(cy_pci_remove)
5176 };
5177 #endif
5178
5179 static int cyclades_proc_show(struct seq_file *m, void *v)
5180 {
5181         struct cyclades_port *info;
5182         unsigned int i, j;
5183         __u32 cur_jifs = jiffies;
5184
5185         seq_puts(m, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5186                         "IdleIn  Overruns  Ldisc\n");
5187
5188         /* Output one line for each known port */
5189         for (i = 0; i < NR_CARDS; i++)
5190                 for (j = 0; j < cy_card[i].nports; j++) {
5191                         info = &cy_card[i].ports[j];
5192
5193                         if (info->port.count)
5194                                 seq_printf(m, "%3d %8lu %10lu %8lu "
5195                                         "%10lu %8lu %9lu %6ld\n", info->line,
5196                                         (cur_jifs - info->idle_stats.in_use) /
5197                                         HZ, info->idle_stats.xmit_bytes,
5198                                         (cur_jifs - info->idle_stats.xmit_idle)/
5199                                         HZ, info->idle_stats.recv_bytes,
5200                                         (cur_jifs - info->idle_stats.recv_idle)/
5201                                         HZ, info->idle_stats.overruns,
5202                                         /* FIXME: double check locking */
5203                                         (long)info->port.tty->ldisc.ops->num);
5204                         else
5205                                 seq_printf(m, "%3d %8lu %10lu %8lu "
5206                                         "%10lu %8lu %9lu %6ld\n",
5207                                         info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5208                 }
5209         return 0;
5210 }
5211
5212 static int cyclades_proc_open(struct inode *inode, struct file *file)
5213 {
5214         return single_open(file, cyclades_proc_show, NULL);
5215 }
5216
5217 static const struct file_operations cyclades_proc_fops = {
5218         .owner          = THIS_MODULE,
5219         .open           = cyclades_proc_open,
5220         .read           = seq_read,
5221         .llseek         = seq_lseek,
5222         .release        = single_release,
5223 };
5224
5225 /* The serial driver boot-time initialization code!
5226     Hardware I/O ports are mapped to character special devices on a
5227     first found, first allocated manner.  That is, this code searches
5228     for Cyclom cards in the system.  As each is found, it is probed
5229     to discover how many chips (and thus how many ports) are present.
5230     These ports are mapped to the tty ports 32 and upward in monotonic
5231     fashion.  If an 8-port card is replaced with a 16-port card, the
5232     port mapping on a following card will shift.
5233
5234     This approach is different from what is used in the other serial
5235     device driver because the Cyclom is more properly a multiplexer,
5236     not just an aggregation of serial ports on one card.
5237
5238     If there are more cards with more ports than have been
5239     statically allocated above, a warning is printed and the
5240     extra ports are ignored.
5241  */
5242
5243 static const struct tty_operations cy_ops = {
5244         .open = cy_open,
5245         .close = cy_close,
5246         .write = cy_write,
5247         .put_char = cy_put_char,
5248         .flush_chars = cy_flush_chars,
5249         .write_room = cy_write_room,
5250         .chars_in_buffer = cy_chars_in_buffer,
5251         .flush_buffer = cy_flush_buffer,
5252         .ioctl = cy_ioctl,
5253         .throttle = cy_throttle,
5254         .unthrottle = cy_unthrottle,
5255         .set_termios = cy_set_termios,
5256         .stop = cy_stop,
5257         .start = cy_start,
5258         .hangup = cy_hangup,
5259         .break_ctl = cy_break,
5260         .wait_until_sent = cy_wait_until_sent,
5261         .tiocmget = cy_tiocmget,
5262         .tiocmset = cy_tiocmset,
5263         .proc_fops = &cyclades_proc_fops,
5264 };
5265
5266 static int __init cy_init(void)
5267 {
5268         unsigned int nboards;
5269         int retval = -ENOMEM;
5270
5271         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5272         if (!cy_serial_driver)
5273                 goto err;
5274
5275         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5276                         __DATE__, __TIME__);
5277
5278         /* Initialize the tty_driver structure */
5279
5280         cy_serial_driver->owner = THIS_MODULE;
5281         cy_serial_driver->driver_name = "cyclades";
5282         cy_serial_driver->name = "ttyC";
5283         cy_serial_driver->major = CYCLADES_MAJOR;
5284         cy_serial_driver->minor_start = 0;
5285         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5286         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5287         cy_serial_driver->init_termios = tty_std_termios;
5288         cy_serial_driver->init_termios.c_cflag =
5289             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5290         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5291         tty_set_operations(cy_serial_driver, &cy_ops);
5292
5293         retval = tty_register_driver(cy_serial_driver);
5294         if (retval) {
5295                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5296                 goto err_frtty;
5297         }
5298
5299         /* the code below is responsible to find the boards. Each different
5300            type of board has its own detection routine. If a board is found,
5301            the next cy_card structure available is set by the detection
5302            routine. These functions are responsible for checking the
5303            availability of cy_card and cy_port data structures and updating
5304            the cy_next_channel. */
5305
5306         /* look for isa boards */
5307         nboards = cy_detect_isa();
5308
5309 #ifdef CONFIG_PCI
5310         /* look for pci boards */
5311         retval = pci_register_driver(&cy_pci_driver);
5312         if (retval && !nboards) {
5313                 tty_unregister_driver(cy_serial_driver);
5314                 goto err_frtty;
5315         }
5316 #endif
5317
5318         return 0;
5319 err_frtty:
5320         put_tty_driver(cy_serial_driver);
5321 err:
5322         return retval;
5323 }                               /* cy_init */
5324
5325 static void __exit cy_cleanup_module(void)
5326 {
5327         struct cyclades_card *card;
5328         unsigned int i, e1;
5329
5330 #ifndef CONFIG_CYZ_INTR
5331         del_timer_sync(&cyz_timerlist);
5332 #endif /* CONFIG_CYZ_INTR */
5333
5334         e1 = tty_unregister_driver(cy_serial_driver);
5335         if (e1)
5336                 printk(KERN_ERR "failed to unregister Cyclades serial "
5337                                 "driver(%d)\n", e1);
5338
5339 #ifdef CONFIG_PCI
5340         pci_unregister_driver(&cy_pci_driver);
5341 #endif
5342
5343         for (i = 0; i < NR_CARDS; i++) {
5344                 card = &cy_card[i];
5345                 if (card->base_addr) {
5346                         /* clear interrupt */
5347                         cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5348                         iounmap(card->base_addr);
5349                         if (card->ctl_addr.p9050)
5350                                 iounmap(card->ctl_addr.p9050);
5351                         if (card->irq
5352 #ifndef CONFIG_CYZ_INTR
5353                                 && !cy_is_Z(card)
5354 #endif /* CONFIG_CYZ_INTR */
5355                                 )
5356                                 free_irq(card->irq, card);
5357                         for (e1 = card->first_line; e1 < card->first_line +
5358                                         card->nports; e1++)
5359                                 tty_unregister_device(cy_serial_driver, e1);
5360                         kfree(card->ports);
5361                 }
5362         }
5363
5364         put_tty_driver(cy_serial_driver);
5365 } /* cy_cleanup_module */
5366
5367 module_init(cy_init);
5368 module_exit(cy_cleanup_module);
5369
5370 MODULE_LICENSE("GPL");
5371 MODULE_VERSION(CY_VERSION);
5372 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);