19c6386bb6926234590d5c92ac7ca7ced093414b
[linux-2.6.git] / drivers / usb / serial / whiteheat.c
1 /*
2  * USB ConnectTech WhiteHEAT driver
3  *
4  *      Copyright (C) 2002
5  *          Connect Tech Inc.
6  *
7  *      Copyright (C) 1999 - 2001
8  *          Greg Kroah-Hartman (greg@kroah.com)
9  *
10  *      This program is free software; you can redistribute it and/or modify
11  *      it under the terms of the GNU General Public License as published by
12  *      the Free Software Foundation; either version 2 of the License, or
13  *      (at your option) any later version.
14  *
15  * See Documentation/usb/usb-serial.txt for more information on using this driver
16  *
17  * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
18  *      Upgrade to full working driver
19  *
20  * (05/30/2001) gkh
21  *      switched from using spinlock to a semaphore, which fixes lots of problems.
22  *
23  * (04/08/2001) gb
24  *      Identify version on module load.
25  * 
26  * 2001_Mar_19 gkh
27  *      Fixed MOD_INC and MOD_DEC logic, the ability to open a port more 
28  *      than once, and the got the proper usb_device_id table entries so
29  *      the driver works again.
30  *
31  * (11/01/2000) Adam J. Richter
32  *      usb_device_id table support
33  * 
34  * (10/05/2000) gkh
35  *      Fixed bug with urb->dev not being set properly, now that the usb
36  *      core needs it.
37  * 
38  * (10/03/2000) smd
39  *      firmware is improved to guard against crap sent to device
40  *      firmware now replies CMD_FAILURE on bad things
41  *      read_callback fix you provided for private info struct
42  *      command_finished now indicates success or fail
43  *      setup_port struct now packed to avoid gcc padding
44  *      firmware uses 1 based port numbering, driver now handles that
45  *
46  * (09/11/2000) gkh
47  *      Removed DEBUG #ifdefs with call to usb_serial_debug_data
48  *
49  * (07/19/2000) gkh
50  *      Added module_init and module_exit functions to handle the fact that this
51  *      driver is a loadable module now.
52  *      Fixed bug with port->minor that was found by Al Borchers
53  *
54  * (07/04/2000) gkh
55  *      Added support for port settings. Baud rate can now be changed. Line signals
56  *      are not transferred to and from the tty layer yet, but things seem to be 
57  *      working well now.
58  *
59  * (05/04/2000) gkh
60  *      First cut at open and close commands. Data can flow through the ports at
61  *      default speeds now.
62  *
63  * (03/26/2000) gkh
64  *      Split driver up into device specific pieces.
65  * 
66  */
67
68 #include <linux/config.h>
69 #include <linux/kernel.h>
70 #include <linux/errno.h>
71 #include <linux/init.h>
72 #include <linux/slab.h>
73 #include <linux/tty.h>
74 #include <linux/tty_driver.h>
75 #include <linux/tty_flip.h>
76 #include <linux/module.h>
77 #include <linux/spinlock.h>
78 #include <asm/uaccess.h>
79 #include <asm/termbits.h>
80 #include <linux/usb.h>
81 #include <linux/serial_reg.h>
82 #include <linux/serial.h>
83 #include "usb-serial.h"
84 #include "whiteheat_fw.h"               /* firmware for the ConnectTech WhiteHEAT device */
85 #include "whiteheat.h"                  /* WhiteHEAT specific commands */
86
87 static int debug;
88
89 #ifndef CMSPAR
90 #define CMSPAR 0
91 #endif
92
93 /*
94  * Version Information
95  */
96 #define DRIVER_VERSION "v2.0"
97 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
98 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
99
100 #define CONNECT_TECH_VENDOR_ID          0x0710
101 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
102 #define CONNECT_TECH_WHITE_HEAT_ID      0x8001
103
104 /*
105    ID tables for whiteheat are unusual, because we want to different
106    things for different versions of the device.  Eventually, this
107    will be doable from a single table.  But, for now, we define two
108    separate ID tables, and then a third table that combines them
109    just for the purpose of exporting the autoloading information.
110 */
111 static struct usb_device_id id_table_std [] = {
112         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
113         { }                                             /* Terminating entry */
114 };
115
116 static struct usb_device_id id_table_prerenumeration [] = {
117         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
118         { }                                             /* Terminating entry */
119 };
120
121 static struct usb_device_id id_table_combined [] = {
122         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
123         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
124         { }                                             /* Terminating entry */
125 };
126
127 MODULE_DEVICE_TABLE (usb, id_table_combined);
128
129 static struct usb_driver whiteheat_driver = {
130         .owner =        THIS_MODULE,
131         .name =         "whiteheat",
132         .probe =        usb_serial_probe,
133         .disconnect =   usb_serial_disconnect,
134         .id_table =     id_table_combined,
135         .no_dynamic_id =        1,
136 };
137
138 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
139 static int  whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id);
140 static int  whiteheat_firmware_attach   (struct usb_serial *serial);
141
142 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
143 static int  whiteheat_attach            (struct usb_serial *serial);
144 static void whiteheat_shutdown          (struct usb_serial *serial);
145 static int  whiteheat_open              (struct usb_serial_port *port, struct file *filp);
146 static void whiteheat_close             (struct usb_serial_port *port, struct file *filp);
147 static int  whiteheat_write             (struct usb_serial_port *port, const unsigned char *buf, int count);
148 static int  whiteheat_write_room        (struct usb_serial_port *port);
149 static int  whiteheat_ioctl             (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
150 static void whiteheat_set_termios       (struct usb_serial_port *port, struct termios * old);
151 static int  whiteheat_tiocmget          (struct usb_serial_port *port, struct file *file);
152 static int  whiteheat_tiocmset          (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
153 static void whiteheat_break_ctl         (struct usb_serial_port *port, int break_state);
154 static int  whiteheat_chars_in_buffer   (struct usb_serial_port *port);
155 static void whiteheat_throttle          (struct usb_serial_port *port);
156 static void whiteheat_unthrottle        (struct usb_serial_port *port);
157 static void whiteheat_read_callback     (struct urb *urb, struct pt_regs *regs);
158 static void whiteheat_write_callback    (struct urb *urb, struct pt_regs *regs);
159
160 static struct usb_serial_driver whiteheat_fake_device = {
161         .driver = {
162                 .owner =        THIS_MODULE,
163                 .name =         "whiteheatnofirm",
164         },
165         .description =          "Connect Tech - WhiteHEAT - (prerenumeration)",
166         .id_table =             id_table_prerenumeration,
167         .num_interrupt_in =     NUM_DONT_CARE,
168         .num_bulk_in =          NUM_DONT_CARE,
169         .num_bulk_out =         NUM_DONT_CARE,
170         .num_ports =            1,
171         .probe =                whiteheat_firmware_download,
172         .attach =               whiteheat_firmware_attach,
173 };
174
175 static struct usb_serial_driver whiteheat_device = {
176         .driver = {
177                 .owner =        THIS_MODULE,
178                 .name =         "whiteheat",
179         },
180         .description =          "Connect Tech - WhiteHEAT",
181         .id_table =             id_table_std,
182         .num_interrupt_in =     NUM_DONT_CARE,
183         .num_bulk_in =          NUM_DONT_CARE,
184         .num_bulk_out =         NUM_DONT_CARE,
185         .num_ports =            4,
186         .attach =               whiteheat_attach,
187         .shutdown =             whiteheat_shutdown,
188         .open =                 whiteheat_open,
189         .close =                whiteheat_close,
190         .write =                whiteheat_write,
191         .write_room =           whiteheat_write_room,
192         .ioctl =                whiteheat_ioctl,
193         .set_termios =          whiteheat_set_termios,
194         .break_ctl =            whiteheat_break_ctl,
195         .tiocmget =             whiteheat_tiocmget,
196         .tiocmset =             whiteheat_tiocmset,
197         .chars_in_buffer =      whiteheat_chars_in_buffer,
198         .throttle =             whiteheat_throttle,
199         .unthrottle =           whiteheat_unthrottle,
200         .read_bulk_callback =   whiteheat_read_callback,
201         .write_bulk_callback =  whiteheat_write_callback,
202 };
203
204
205 struct whiteheat_command_private {
206         spinlock_t              lock;
207         __u8                    port_running;
208         __u8                    command_finished;
209         wait_queue_head_t       wait_command;   /* for handling sleeping while waiting for a command to finish */
210         __u8                    result_buffer[64];
211 };
212
213
214 #define THROTTLED               0x01
215 #define ACTUALLY_THROTTLED      0x02
216
217 static int urb_pool_size = 8;
218
219 struct whiteheat_urb_wrap {
220         struct list_head        list;
221         struct urb              *urb;
222 };
223
224 struct whiteheat_private {
225         spinlock_t              lock;
226         __u8                    flags;
227         __u8                    mcr;
228         struct list_head        rx_urbs_free;
229         struct list_head        rx_urbs_submitted;
230         struct list_head        rx_urb_q;
231         struct work_struct      rx_work;
232         struct list_head        tx_urbs_free;
233         struct list_head        tx_urbs_submitted;
234 };
235
236
237 /* local function prototypes */
238 static int start_command_port(struct usb_serial *serial);
239 static void stop_command_port(struct usb_serial *serial);
240 static void command_port_write_callback(struct urb *urb, struct pt_regs *regs);
241 static void command_port_read_callback(struct urb *urb, struct pt_regs *regs);
242
243 static int start_port_read(struct usb_serial_port *port);
244 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
245 static struct list_head *list_first(struct list_head *head);
246 static void rx_data_softint(void *private);
247
248 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
249 static int firm_open(struct usb_serial_port *port);
250 static int firm_close(struct usb_serial_port *port);
251 static int firm_setup_port(struct usb_serial_port *port);
252 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
253 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
254 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
255 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
256 static int firm_get_dtr_rts(struct usb_serial_port *port);
257 static int firm_report_tx_done(struct usb_serial_port *port);
258
259
260 #define COMMAND_PORT            4
261 #define COMMAND_TIMEOUT         (2*HZ)  /* 2 second timeout for a command */
262 #define COMMAND_TIMEOUT_MS      2000
263 #define CLOSING_DELAY           (30 * HZ)
264
265
266 /*****************************************************************************
267  * Connect Tech's White Heat prerenumeration driver functions
268  *****************************************************************************/
269
270 /* steps to download the firmware to the WhiteHEAT device:
271  - hold the reset (by writing to the reset bit of the CPUCS register)
272  - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
273  - release the reset (by writing to the CPUCS register)
274  - download the WH.HEX file for all addresses greater than 0x1b3f using
275    VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
276  - hold the reset
277  - download the WH.HEX file for all addresses less than 0x1b40 using
278    VENDOR_REQUEST_ANCHOR_LOAD
279  - release the reset
280  - device renumerated itself and comes up as new device id with all
281    firmware download completed.
282 */
283 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id)
284 {
285         int response;
286         const struct whiteheat_hex_record *record;
287         
288         dbg("%s", __FUNCTION__);
289         
290         response = ezusb_set_reset (serial, 1);
291
292         record = &whiteheat_loader[0];
293         while (record->address != 0xffff) {
294                 response = ezusb_writememory (serial, record->address, 
295                                 (unsigned char *)record->data, record->data_size, 0xa0);
296                 if (response < 0) {
297                         err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
298                                 __FUNCTION__, response, record->address, record->data, record->data_size);
299                         break;
300                 }
301                 ++record;
302         }
303
304         response = ezusb_set_reset (serial, 0);
305
306         record = &whiteheat_firmware[0];
307         while (record->address < 0x1b40) {
308                 ++record;
309         }
310         while (record->address != 0xffff) {
311                 response = ezusb_writememory (serial, record->address, 
312                                 (unsigned char *)record->data, record->data_size, 0xa3);
313                 if (response < 0) {
314                         err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)", 
315                                 __FUNCTION__, response, record->address, record->data, record->data_size);
316                         break;
317                 }
318                 ++record;
319         }
320         
321         response = ezusb_set_reset (serial, 1);
322
323         record = &whiteheat_firmware[0];
324         while (record->address < 0x1b40) {
325                 response = ezusb_writememory (serial, record->address, 
326                                 (unsigned char *)record->data, record->data_size, 0xa0);
327                 if (response < 0) {
328                         err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)", 
329                                 __FUNCTION__, response, record->address, record->data, record->data_size);
330                         break;
331                 }
332                 ++record;
333         }
334
335         response = ezusb_set_reset (serial, 0);
336
337         return 0;
338 }
339
340
341 static int whiteheat_firmware_attach (struct usb_serial *serial)
342 {
343         /* We want this device to fail to have a driver assigned to it */
344         return 1;
345 }
346
347
348 /*****************************************************************************
349  * Connect Tech's White Heat serial driver functions
350  *****************************************************************************/
351 static int whiteheat_attach (struct usb_serial *serial)
352 {
353         struct usb_serial_port *command_port;
354         struct whiteheat_command_private *command_info;
355         struct usb_serial_port *port;
356         struct whiteheat_private *info;
357         struct whiteheat_hw_info *hw_info;
358         int pipe;
359         int ret;
360         int alen;
361         __u8 *command;
362         __u8 *result;
363         int i;
364         int j;
365         struct urb *urb;
366         int buf_size;
367         struct whiteheat_urb_wrap *wrap;
368         struct list_head *tmp;
369
370         command_port = serial->port[COMMAND_PORT];
371
372         pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress);
373         command = kmalloc(2, GFP_KERNEL);
374         if (!command)
375                 goto no_command_buffer;
376         command[0] = WHITEHEAT_GET_HW_INFO;
377         command[1] = 0;
378         
379         result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
380         if (!result)
381                 goto no_result_buffer;
382         /*
383          * When the module is reloaded the firmware is still there and
384          * the endpoints are still in the usb core unchanged. This is the
385          * unlinking bug in disguise. Same for the call below.
386          */
387         usb_clear_halt(serial->dev, pipe);
388         ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS);
389         if (ret) {
390                 err("%s: Couldn't send command [%d]", serial->type->description, ret);
391                 goto no_firmware;
392         } else if (alen != sizeof(command)) {
393                 err("%s: Send command incomplete [%d]", serial->type->description, alen);
394                 goto no_firmware;
395         }
396
397         pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress);
398         /* See the comment on the usb_clear_halt() above */
399         usb_clear_halt(serial->dev, pipe);
400         ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
401         if (ret) {
402                 err("%s: Couldn't get results [%d]", serial->type->description, ret);
403                 goto no_firmware;
404         } else if (alen != sizeof(result)) {
405                 err("%s: Get results incomplete [%d]", serial->type->description, alen);
406                 goto no_firmware;
407         } else if (result[0] != command[0]) {
408                 err("%s: Command failed [%d]", serial->type->description, result[0]);
409                 goto no_firmware;
410         }
411
412         hw_info = (struct whiteheat_hw_info *)&result[1];
413
414         info("%s: Driver %s: Firmware v%d.%02d", serial->type->description,
415              DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
416
417         for (i = 0; i < serial->num_ports; i++) {
418                 port = serial->port[i];
419
420                 info = (struct whiteheat_private *)kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
421                 if (info == NULL) {
422                         err("%s: Out of memory for port structures\n", serial->type->description);
423                         goto no_private;
424                 }
425
426                 spin_lock_init(&info->lock);
427                 info->flags = 0;
428                 info->mcr = 0;
429                 INIT_WORK(&info->rx_work, rx_data_softint, port);
430
431                 INIT_LIST_HEAD(&info->rx_urbs_free);
432                 INIT_LIST_HEAD(&info->rx_urbs_submitted);
433                 INIT_LIST_HEAD(&info->rx_urb_q);
434                 INIT_LIST_HEAD(&info->tx_urbs_free);
435                 INIT_LIST_HEAD(&info->tx_urbs_submitted);
436
437                 for (j = 0; j < urb_pool_size; j++) {
438                         urb = usb_alloc_urb(0, GFP_KERNEL);
439                         if (!urb) {
440                                 err("No free urbs available");
441                                 goto no_rx_urb;
442                         }
443                         buf_size = port->read_urb->transfer_buffer_length;
444                         urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
445                         if (!urb->transfer_buffer) {
446                                 err("Couldn't allocate urb buffer");
447                                 goto no_rx_buf;
448                         }
449                         wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
450                         if (!wrap) {
451                                 err("Couldn't allocate urb wrapper");
452                                 goto no_rx_wrap;
453                         }
454                         usb_fill_bulk_urb(urb, serial->dev,
455                                         usb_rcvbulkpipe(serial->dev,
456                                                 port->bulk_in_endpointAddress),
457                                         urb->transfer_buffer, buf_size,
458                                         whiteheat_read_callback, port);
459                         wrap->urb = urb;
460                         list_add(&wrap->list, &info->rx_urbs_free);
461
462                         urb = usb_alloc_urb(0, GFP_KERNEL);
463                         if (!urb) {
464                                 err("No free urbs available");
465                                 goto no_tx_urb;
466                         }
467                         buf_size = port->write_urb->transfer_buffer_length;
468                         urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
469                         if (!urb->transfer_buffer) {
470                                 err("Couldn't allocate urb buffer");
471                                 goto no_tx_buf;
472                         }
473                         wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
474                         if (!wrap) {
475                                 err("Couldn't allocate urb wrapper");
476                                 goto no_tx_wrap;
477                         }
478                         usb_fill_bulk_urb(urb, serial->dev,
479                                         usb_sndbulkpipe(serial->dev,
480                                                 port->bulk_out_endpointAddress),
481                                         urb->transfer_buffer, buf_size,
482                                         whiteheat_write_callback, port);
483                         wrap->urb = urb;
484                         list_add(&wrap->list, &info->tx_urbs_free);
485                 }
486
487                 usb_set_serial_port_data(port, info);
488         }
489
490         command_info = (struct whiteheat_command_private *)kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
491         if (command_info == NULL) {
492                 err("%s: Out of memory for port structures\n", serial->type->description);
493                 goto no_command_private;
494         }
495
496         spin_lock_init(&command_info->lock);
497         command_info->port_running = 0;
498         init_waitqueue_head(&command_info->wait_command);
499         usb_set_serial_port_data(command_port, command_info);
500         command_port->write_urb->complete = command_port_write_callback;
501         command_port->read_urb->complete = command_port_read_callback;
502         kfree(result);
503         kfree(command);
504
505         return 0;
506
507 no_firmware:
508         /* Firmware likely not running */
509         err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description);
510         err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description);
511         err("%s: please contact support@connecttech.com\n", serial->type->description);
512         return -ENODEV;
513
514 no_command_private:
515         for (i = serial->num_ports - 1; i >= 0; i--) {
516                 port = serial->port[i];
517                 info = usb_get_serial_port_data(port);
518                 for (j = urb_pool_size - 1; j >= 0; j--) {
519                         tmp = list_first(&info->tx_urbs_free);
520                         list_del(tmp);
521                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
522                         urb = wrap->urb;
523                         kfree(wrap);
524 no_tx_wrap:
525                         kfree(urb->transfer_buffer);
526 no_tx_buf:
527                         usb_free_urb(urb);
528 no_tx_urb:
529                         tmp = list_first(&info->rx_urbs_free);
530                         list_del(tmp);
531                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
532                         urb = wrap->urb;
533                         kfree(wrap);
534 no_rx_wrap:
535                         kfree(urb->transfer_buffer);
536 no_rx_buf:
537                         usb_free_urb(urb);
538 no_rx_urb:
539                         ;
540                 }
541                 kfree(info);
542 no_private:
543                 ;
544         }
545         kfree(result);
546 no_result_buffer:
547         kfree(command);
548 no_command_buffer:
549         return -ENOMEM;
550 }
551
552
553 static void whiteheat_shutdown (struct usb_serial *serial)
554 {
555         struct usb_serial_port *command_port;
556         struct usb_serial_port *port;
557         struct whiteheat_private *info;
558         struct whiteheat_urb_wrap *wrap;
559         struct urb *urb;
560         struct list_head *tmp;
561         struct list_head *tmp2;
562         int i;
563
564         dbg("%s", __FUNCTION__);
565
566         /* free up our private data for our command port */
567         command_port = serial->port[COMMAND_PORT];
568         kfree (usb_get_serial_port_data(command_port));
569
570         for (i = 0; i < serial->num_ports; i++) {
571                 port = serial->port[i];
572                 info = usb_get_serial_port_data(port);
573                 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
574                         list_del(tmp);
575                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
576                         urb = wrap->urb;
577                         kfree(wrap);
578                         kfree(urb->transfer_buffer);
579                         usb_free_urb(urb);
580                 }
581                 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
582                         list_del(tmp);
583                         wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
584                         urb = wrap->urb;
585                         kfree(wrap);
586                         kfree(urb->transfer_buffer);
587                         usb_free_urb(urb);
588                 }
589                 kfree(info);
590         }
591
592         return;
593 }
594
595
596 static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
597 {
598         int             retval = 0;
599         struct termios  old_term;
600
601         dbg("%s - port %d", __FUNCTION__, port->number);
602
603         retval = start_command_port(port->serial);
604         if (retval)
605                 goto exit;
606
607         if (port->tty)
608                 port->tty->low_latency = 1;
609
610         /* send an open port command */
611         retval = firm_open(port);
612         if (retval) {
613                 stop_command_port(port->serial);
614                 goto exit;
615         }
616
617         retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
618         if (retval) {
619                 firm_close(port);
620                 stop_command_port(port->serial);
621                 goto exit;
622         }
623
624         old_term.c_cflag = ~port->tty->termios->c_cflag;
625         old_term.c_iflag = ~port->tty->termios->c_iflag;
626         whiteheat_set_termios(port, &old_term);
627
628         /* Work around HCD bugs */
629         usb_clear_halt(port->serial->dev, port->read_urb->pipe);
630         usb_clear_halt(port->serial->dev, port->write_urb->pipe);
631
632         /* Start reading from the device */
633         retval = start_port_read(port);
634         if (retval) {
635                 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
636                 firm_close(port);
637                 stop_command_port(port->serial);
638                 goto exit;
639         }
640
641 exit:
642         dbg("%s - exit, retval = %d", __FUNCTION__, retval);
643         return retval;
644 }
645
646
647 static void whiteheat_close(struct usb_serial_port *port, struct file * filp)
648 {
649         struct whiteheat_private *info = usb_get_serial_port_data(port);
650         struct whiteheat_urb_wrap *wrap;
651         struct urb *urb;
652         struct list_head *tmp;
653         struct list_head *tmp2;
654         unsigned long flags;
655
656         dbg("%s - port %d", __FUNCTION__, port->number);
657         
658         /* filp is NULL when called from usb_serial_disconnect */
659         if (filp && (tty_hung_up_p(filp))) {
660                 return;
661         }
662
663         port->tty->closing = 1;
664
665 /*
666  * Not currently in use; tty_wait_until_sent() calls
667  * serial_chars_in_buffer() which deadlocks on the second semaphore
668  * acquisition. This should be fixed at some point. Greg's been
669  * notified.
670         if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
671                 tty_wait_until_sent(port->tty, CLOSING_DELAY);
672         }
673 */
674
675         if (port->tty->driver->flush_buffer)
676                 port->tty->driver->flush_buffer(port->tty);
677         tty_ldisc_flush(port->tty);
678
679         firm_report_tx_done(port);
680
681         firm_close(port);
682
683         /* shutdown our bulk reads and writes */
684         spin_lock_irqsave(&info->lock, flags);
685         list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
686                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
687                 urb = wrap->urb;
688                 usb_kill_urb(urb);
689                 list_del(tmp);
690                 list_add(tmp, &info->rx_urbs_free);
691         }
692         list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
693                 list_del(tmp);
694                 list_add(tmp, &info->rx_urbs_free);
695         }
696         list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
697                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
698                 urb = wrap->urb;
699                 usb_kill_urb(urb);
700                 list_del(tmp);
701                 list_add(tmp, &info->tx_urbs_free);
702         }
703         spin_unlock_irqrestore(&info->lock, flags);
704
705         stop_command_port(port->serial);
706
707         port->tty->closing = 0;
708 }
709
710
711 static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count)
712 {
713         struct usb_serial *serial = port->serial;
714         struct whiteheat_private *info = usb_get_serial_port_data(port);
715         struct whiteheat_urb_wrap *wrap;
716         struct urb *urb;
717         int result;
718         int bytes;
719         int sent = 0;
720         unsigned long flags;
721         struct list_head *tmp;
722
723         dbg("%s - port %d", __FUNCTION__, port->number);
724
725         if (count == 0) {
726                 dbg("%s - write request of 0 bytes", __FUNCTION__);
727                 return (0);
728         }
729
730         while (count) {
731                 spin_lock_irqsave(&info->lock, flags);
732                 if (list_empty(&info->tx_urbs_free)) {
733                         spin_unlock_irqrestore(&info->lock, flags);
734                         break;
735                 }
736                 tmp = list_first(&info->tx_urbs_free);
737                 list_del(tmp);
738                 spin_unlock_irqrestore(&info->lock, flags);
739
740                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
741                 urb = wrap->urb;
742                 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count;
743                 memcpy (urb->transfer_buffer, buf + sent, bytes);
744
745                 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer);
746
747                 urb->dev = serial->dev;
748                 urb->transfer_buffer_length = bytes;
749                 result = usb_submit_urb(urb, GFP_ATOMIC);
750                 if (result) {
751                         err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
752                         sent = result;
753                         spin_lock_irqsave(&info->lock, flags);
754                         list_add(tmp, &info->tx_urbs_free);
755                         spin_unlock_irqrestore(&info->lock, flags);
756                         break;
757                 } else {
758                         sent += bytes;
759                         count -= bytes;
760                         spin_lock_irqsave(&info->lock, flags);
761                         list_add(tmp, &info->tx_urbs_submitted);
762                         spin_unlock_irqrestore(&info->lock, flags);
763                 }
764         }
765
766         return sent;
767 }
768
769
770 static int whiteheat_write_room(struct usb_serial_port *port)
771 {
772         struct whiteheat_private *info = usb_get_serial_port_data(port);
773         struct list_head *tmp;
774         int room = 0;
775         unsigned long flags;
776
777         dbg("%s - port %d", __FUNCTION__, port->number);
778         
779         spin_lock_irqsave(&info->lock, flags);
780         list_for_each(tmp, &info->tx_urbs_free)
781                 room++;
782         spin_unlock_irqrestore(&info->lock, flags);
783         room *= port->bulk_out_size;
784
785         dbg("%s - returns %d", __FUNCTION__, room);
786         return (room);
787 }
788
789
790 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file)
791 {
792         struct whiteheat_private *info = usb_get_serial_port_data(port);
793         unsigned int modem_signals = 0;
794
795         dbg("%s - port %d", __FUNCTION__, port->number);
796
797         firm_get_dtr_rts(port);
798         if (info->mcr & UART_MCR_DTR)
799                 modem_signals |= TIOCM_DTR;
800         if (info->mcr & UART_MCR_RTS)
801                 modem_signals |= TIOCM_RTS;
802
803         return modem_signals;
804 }
805
806
807 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file,
808                                unsigned int set, unsigned int clear)
809 {
810         struct whiteheat_private *info = usb_get_serial_port_data(port);
811
812         dbg("%s - port %d", __FUNCTION__, port->number);
813
814         if (set & TIOCM_RTS)
815                 info->mcr |= UART_MCR_RTS;
816         if (set & TIOCM_DTR)
817                 info->mcr |= UART_MCR_DTR;
818
819         if (clear & TIOCM_RTS)
820                 info->mcr &= ~UART_MCR_RTS;
821         if (clear & TIOCM_DTR)
822                 info->mcr &= ~UART_MCR_DTR;
823
824         firm_set_dtr(port, info->mcr & UART_MCR_DTR);
825         firm_set_rts(port, info->mcr & UART_MCR_RTS);
826         return 0;
827 }
828
829
830 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
831 {
832         struct serial_struct serstruct;
833         void __user *user_arg = (void __user *)arg;
834
835         dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
836
837         switch (cmd) {
838                 case TIOCGSERIAL:
839                         memset(&serstruct, 0, sizeof(serstruct));
840                         serstruct.type = PORT_16654;
841                         serstruct.line = port->serial->minor;
842                         serstruct.port = port->number;
843                         serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
844                         serstruct.xmit_fifo_size = port->bulk_out_size;
845                         serstruct.custom_divisor = 0;
846                         serstruct.baud_base = 460800;
847                         serstruct.close_delay = CLOSING_DELAY;
848                         serstruct.closing_wait = CLOSING_DELAY;
849
850                         if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
851                                 return -EFAULT;
852
853                         break;
854
855                 case TIOCSSERIAL:
856                         if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
857                                 return -EFAULT;
858
859                         /*
860                          * For now this is ignored. dip sets the ASYNC_[V]HI flags
861                          * but this isn't used by us at all. Maybe someone somewhere
862                          * will need the custom_divisor setting.
863                          */
864
865                         break;
866
867                 default:
868                         break;
869         }
870
871         return -ENOIOCTLCMD;
872 }
873
874
875 static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios)
876 {
877         dbg("%s -port %d", __FUNCTION__, port->number);
878
879         if ((!port->tty) || (!port->tty->termios)) {
880                 dbg("%s - no tty structures", __FUNCTION__);
881                 goto exit;
882         }
883         
884         /* check that they really want us to change something */
885         if (old_termios) {
886                 if ((port->tty->termios->c_cflag == old_termios->c_cflag) &&
887                     (port->tty->termios->c_iflag == old_termios->c_iflag)) {
888                         dbg("%s - nothing to change...", __FUNCTION__);
889                         goto exit;
890                 }
891         }
892
893         firm_setup_port(port);
894
895 exit:
896         return;
897 }
898
899
900 static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
901         firm_set_break(port, break_state);
902 }
903
904
905 static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
906 {
907         struct whiteheat_private *info = usb_get_serial_port_data(port);
908         struct list_head *tmp;
909         struct whiteheat_urb_wrap *wrap;
910         int chars = 0;
911         unsigned long flags;
912
913         dbg("%s - port %d", __FUNCTION__, port->number);
914
915         spin_lock_irqsave(&info->lock, flags);
916         list_for_each(tmp, &info->tx_urbs_submitted) {
917                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
918                 chars += wrap->urb->transfer_buffer_length;
919         }
920         spin_unlock_irqrestore(&info->lock, flags);
921
922         dbg ("%s - returns %d", __FUNCTION__, chars);
923         return (chars);
924 }
925
926
927 static void whiteheat_throttle (struct usb_serial_port *port)
928 {
929         struct whiteheat_private *info = usb_get_serial_port_data(port);
930         unsigned long flags;
931
932         dbg("%s - port %d", __FUNCTION__, port->number);
933
934         spin_lock_irqsave(&info->lock, flags);
935         info->flags |= THROTTLED;
936         spin_unlock_irqrestore(&info->lock, flags);
937
938         return;
939 }
940
941
942 static void whiteheat_unthrottle (struct usb_serial_port *port)
943 {
944         struct whiteheat_private *info = usb_get_serial_port_data(port);
945         int actually_throttled;
946         unsigned long flags;
947
948         dbg("%s - port %d", __FUNCTION__, port->number);
949
950         spin_lock_irqsave(&info->lock, flags);
951         actually_throttled = info->flags & ACTUALLY_THROTTLED;
952         info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
953         spin_unlock_irqrestore(&info->lock, flags);
954
955         if (actually_throttled)
956                 rx_data_softint(port);
957
958         return;
959 }
960
961
962 /*****************************************************************************
963  * Connect Tech's White Heat callback routines
964  *****************************************************************************/
965 static void command_port_write_callback (struct urb *urb, struct pt_regs *regs)
966 {
967         dbg("%s", __FUNCTION__);
968
969         if (urb->status) {
970                 dbg ("nonzero urb status: %d", urb->status);
971                 return;
972         }
973 }
974
975
976 static void command_port_read_callback (struct urb *urb, struct pt_regs *regs)
977 {
978         struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context;
979         struct whiteheat_command_private *command_info;
980         unsigned char *data = urb->transfer_buffer;
981         int result;
982         unsigned long flags;
983
984         dbg("%s", __FUNCTION__);
985
986         if (urb->status) {
987                 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status);
988                 return;
989         }
990
991         usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data);
992
993         command_info = usb_get_serial_port_data(command_port);
994         if (!command_info) {
995                 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__);
996                 return;
997         }
998         spin_lock_irqsave(&command_info->lock, flags);
999
1000         if (data[0] == WHITEHEAT_CMD_COMPLETE) {
1001                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1002                 wake_up_interruptible(&command_info->wait_command);
1003         } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
1004                 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
1005                 wake_up_interruptible(&command_info->wait_command);
1006         } else if (data[0] == WHITEHEAT_EVENT) {
1007                 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
1008                 dbg("%s - event received", __FUNCTION__);
1009         } else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
1010                 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
1011                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
1012                 wake_up_interruptible(&command_info->wait_command);
1013         } else {
1014                 dbg("%s - bad reply from firmware", __FUNCTION__);
1015         }
1016         
1017         /* Continue trying to always read */
1018         command_port->read_urb->dev = command_port->serial->dev;
1019         result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
1020         spin_unlock_irqrestore(&command_info->lock, flags);
1021         if (result)
1022                 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1023 }
1024
1025
1026 static void whiteheat_read_callback(struct urb *urb, struct pt_regs *regs)
1027 {
1028         struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1029         struct whiteheat_urb_wrap *wrap;
1030         unsigned char *data = urb->transfer_buffer;
1031         struct whiteheat_private *info = usb_get_serial_port_data(port);
1032
1033         dbg("%s - port %d", __FUNCTION__, port->number);
1034
1035         spin_lock(&info->lock);
1036         wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
1037         if (!wrap) {
1038                 spin_unlock(&info->lock);
1039                 err("%s - Not my urb!", __FUNCTION__);
1040                 return;
1041         }
1042         list_del(&wrap->list);
1043         spin_unlock(&info->lock);
1044
1045         if (urb->status) {
1046                 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
1047                 spin_lock(&info->lock);
1048                 list_add(&wrap->list, &info->rx_urbs_free);
1049                 spin_unlock(&info->lock);
1050                 return;
1051         }
1052
1053         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1054
1055         spin_lock(&info->lock);
1056         list_add_tail(&wrap->list, &info->rx_urb_q);
1057         if (info->flags & THROTTLED) {
1058                 info->flags |= ACTUALLY_THROTTLED;
1059                 spin_unlock(&info->lock);
1060                 return;
1061         }
1062         spin_unlock(&info->lock);
1063
1064         schedule_work(&info->rx_work);
1065 }
1066
1067
1068 static void whiteheat_write_callback(struct urb *urb, struct pt_regs *regs)
1069 {
1070         struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1071         struct whiteheat_private *info = usb_get_serial_port_data(port);
1072         struct whiteheat_urb_wrap *wrap;
1073
1074         dbg("%s - port %d", __FUNCTION__, port->number);
1075
1076         spin_lock(&info->lock);
1077         wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
1078         if (!wrap) {
1079                 spin_unlock(&info->lock);
1080                 err("%s - Not my urb!", __FUNCTION__);
1081                 return;
1082         }
1083         list_del(&wrap->list);
1084         list_add(&wrap->list, &info->tx_urbs_free);
1085         spin_unlock(&info->lock);
1086
1087         if (urb->status) {
1088                 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
1089                 return;
1090         }
1091
1092         usb_serial_port_softint((void *)port);
1093
1094         schedule_work(&port->work);
1095 }
1096
1097
1098 /*****************************************************************************
1099  * Connect Tech's White Heat firmware interface
1100  *****************************************************************************/
1101 static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
1102 {
1103         struct usb_serial_port *command_port;
1104         struct whiteheat_command_private *command_info;
1105         struct whiteheat_private *info;
1106         __u8 *transfer_buffer;
1107         int retval = 0;
1108         unsigned long flags;
1109
1110         dbg("%s - command %d", __FUNCTION__, command);
1111
1112         command_port = port->serial->port[COMMAND_PORT];
1113         command_info = usb_get_serial_port_data(command_port);
1114         spin_lock_irqsave(&command_info->lock, flags);
1115         command_info->command_finished = FALSE;
1116         
1117         transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
1118         transfer_buffer[0] = command;
1119         memcpy (&transfer_buffer[1], data, datasize);
1120         command_port->write_urb->transfer_buffer_length = datasize + 1;
1121         command_port->write_urb->dev = port->serial->dev;
1122         retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL);
1123         if (retval) {
1124                 dbg("%s - submit urb failed", __FUNCTION__);
1125                 goto exit;
1126         }
1127         spin_unlock_irqrestore(&command_info->lock, flags);
1128
1129         /* wait for the command to complete */
1130         wait_event_interruptible_timeout(command_info->wait_command, 
1131                 (command_info->command_finished != FALSE), COMMAND_TIMEOUT);
1132
1133         spin_lock_irqsave(&command_info->lock, flags);
1134
1135         if (command_info->command_finished == FALSE) {
1136                 dbg("%s - command timed out.", __FUNCTION__);
1137                 retval = -ETIMEDOUT;
1138                 goto exit;
1139         }
1140
1141         if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
1142                 dbg("%s - command failed.", __FUNCTION__);
1143                 retval = -EIO;
1144                 goto exit;
1145         }
1146
1147         if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
1148                 dbg("%s - command completed.", __FUNCTION__);
1149                 switch (command) {
1150                         case WHITEHEAT_GET_DTR_RTS:
1151                                 info = usb_get_serial_port_data(port);
1152                                 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
1153                                 break;
1154                 }
1155         }
1156
1157 exit:
1158         spin_unlock_irqrestore(&command_info->lock, flags);
1159         return retval;
1160 }
1161
1162
1163 static int firm_open(struct usb_serial_port *port) {
1164         struct whiteheat_simple open_command;
1165
1166         open_command.port = port->number - port->serial->minor + 1;
1167         return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
1168 }
1169
1170
1171 static int firm_close(struct usb_serial_port *port) {
1172         struct whiteheat_simple close_command;
1173
1174         close_command.port = port->number - port->serial->minor + 1;
1175         return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
1176 }
1177
1178
1179 static int firm_setup_port(struct usb_serial_port *port) {
1180         struct whiteheat_port_settings port_settings;
1181         unsigned int cflag = port->tty->termios->c_cflag;
1182
1183         port_settings.port = port->number + 1;
1184
1185         /* get the byte size */
1186         switch (cflag & CSIZE) {
1187                 case CS5:       port_settings.bits = 5;   break;
1188                 case CS6:       port_settings.bits = 6;   break;
1189                 case CS7:       port_settings.bits = 7;   break;
1190                 default:
1191                 case CS8:       port_settings.bits = 8;   break;
1192         }
1193         dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits);
1194         
1195         /* determine the parity */
1196         if (cflag & PARENB)
1197                 if (cflag & CMSPAR)
1198                         if (cflag & PARODD)
1199                                 port_settings.parity = WHITEHEAT_PAR_MARK;
1200                         else
1201                                 port_settings.parity = WHITEHEAT_PAR_SPACE;
1202                 else
1203                         if (cflag & PARODD)
1204                                 port_settings.parity = WHITEHEAT_PAR_ODD;
1205                         else
1206                                 port_settings.parity = WHITEHEAT_PAR_EVEN;
1207         else
1208                 port_settings.parity = WHITEHEAT_PAR_NONE;
1209         dbg("%s - parity = %c", __FUNCTION__, port_settings.parity);
1210
1211         /* figure out the stop bits requested */
1212         if (cflag & CSTOPB)
1213                 port_settings.stop = 2;
1214         else
1215                 port_settings.stop = 1;
1216         dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop);
1217
1218         /* figure out the flow control settings */
1219         if (cflag & CRTSCTS)
1220                 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
1221         else
1222                 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
1223         dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__,
1224             (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
1225             (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
1226             (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
1227             (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
1228         
1229         /* determine software flow control */
1230         if (I_IXOFF(port->tty))
1231                 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
1232         else
1233                 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
1234         dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow);
1235         
1236         port_settings.xon = START_CHAR(port->tty);
1237         port_settings.xoff = STOP_CHAR(port->tty);
1238         dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff);
1239
1240         /* get the baud rate wanted */
1241         port_settings.baud = tty_get_baud_rate(port->tty);
1242         dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud);
1243
1244         /* handle any settings that aren't specified in the tty structure */
1245         port_settings.lloop = 0;
1246         
1247         /* now send the message to the device */
1248         return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
1249 }
1250
1251
1252 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
1253         struct whiteheat_set_rdb rts_command;
1254
1255         rts_command.port = port->number - port->serial->minor + 1;
1256         rts_command.state = onoff;
1257         return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
1258 }
1259
1260
1261 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
1262         struct whiteheat_set_rdb dtr_command;
1263
1264         dtr_command.port = port->number - port->serial->minor + 1;
1265         dtr_command.state = onoff;
1266         return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
1267 }
1268
1269
1270 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
1271         struct whiteheat_set_rdb break_command;
1272
1273         break_command.port = port->number - port->serial->minor + 1;
1274         break_command.state = onoff;
1275         return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
1276 }
1277
1278
1279 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
1280         struct whiteheat_purge purge_command;
1281
1282         purge_command.port = port->number - port->serial->minor + 1;
1283         purge_command.what = rxtx;
1284         return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
1285 }
1286
1287
1288 static int firm_get_dtr_rts(struct usb_serial_port *port) {
1289         struct whiteheat_simple get_dr_command;
1290
1291         get_dr_command.port = port->number - port->serial->minor + 1;
1292         return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
1293 }
1294
1295
1296 static int firm_report_tx_done(struct usb_serial_port *port) {
1297         struct whiteheat_simple close_command;
1298
1299         close_command.port = port->number - port->serial->minor + 1;
1300         return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
1301 }
1302
1303
1304 /*****************************************************************************
1305  * Connect Tech's White Heat utility functions
1306  *****************************************************************************/
1307 static int start_command_port(struct usb_serial *serial)
1308 {
1309         struct usb_serial_port *command_port;
1310         struct whiteheat_command_private *command_info;
1311         unsigned long flags;
1312         int retval = 0;
1313         
1314         command_port = serial->port[COMMAND_PORT];
1315         command_info = usb_get_serial_port_data(command_port);
1316         spin_lock_irqsave(&command_info->lock, flags);
1317         if (!command_info->port_running) {
1318                 /* Work around HCD bugs */
1319                 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
1320
1321                 command_port->read_urb->dev = serial->dev;
1322                 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
1323                 if (retval) {
1324                         err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
1325                         goto exit;
1326                 }
1327         }
1328         command_info->port_running++;
1329
1330 exit:
1331         spin_unlock_irqrestore(&command_info->lock, flags);
1332         return retval;
1333 }
1334
1335
1336 static void stop_command_port(struct usb_serial *serial)
1337 {
1338         struct usb_serial_port *command_port;
1339         struct whiteheat_command_private *command_info;
1340         unsigned long flags;
1341
1342         command_port = serial->port[COMMAND_PORT];
1343         command_info = usb_get_serial_port_data(command_port);
1344         spin_lock_irqsave(&command_info->lock, flags);
1345         command_info->port_running--;
1346         if (!command_info->port_running)
1347                 usb_kill_urb(command_port->read_urb);
1348         spin_unlock_irqrestore(&command_info->lock, flags);
1349 }
1350
1351
1352 static int start_port_read(struct usb_serial_port *port)
1353 {
1354         struct whiteheat_private *info = usb_get_serial_port_data(port);
1355         struct whiteheat_urb_wrap *wrap;
1356         struct urb *urb;
1357         int retval = 0;
1358         unsigned long flags;
1359         struct list_head *tmp;
1360         struct list_head *tmp2;
1361
1362         spin_lock_irqsave(&info->lock, flags);
1363
1364         list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
1365                 list_del(tmp);
1366                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1367                 urb = wrap->urb;
1368                 urb->dev = port->serial->dev;
1369                 retval = usb_submit_urb(urb, GFP_KERNEL);
1370                 if (retval) {
1371                         list_add(tmp, &info->rx_urbs_free);
1372                         list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
1373                                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1374                                 urb = wrap->urb;
1375                                 usb_kill_urb(urb);
1376                                 list_del(tmp);
1377                                 list_add(tmp, &info->rx_urbs_free);
1378                         }
1379                         break;
1380                 }
1381                 list_add(tmp, &info->rx_urbs_submitted);
1382         }
1383
1384         spin_unlock_irqrestore(&info->lock, flags);
1385
1386         return retval;
1387 }
1388
1389
1390 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
1391 {
1392         struct whiteheat_urb_wrap *wrap;
1393         struct list_head *tmp;
1394
1395         list_for_each(tmp, head) {
1396                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1397                 if (wrap->urb == urb)
1398                         return wrap;
1399         }
1400
1401         return NULL;
1402 }
1403
1404
1405 static struct list_head *list_first(struct list_head *head)
1406 {
1407         return head->next;
1408 }
1409
1410
1411 static void rx_data_softint(void *private)
1412 {
1413         struct usb_serial_port *port = (struct usb_serial_port *)private;
1414         struct whiteheat_private *info = usb_get_serial_port_data(port);
1415         struct tty_struct *tty = port->tty;
1416         struct whiteheat_urb_wrap *wrap;
1417         struct urb *urb;
1418         unsigned long flags;
1419         struct list_head *tmp;
1420         struct list_head *tmp2;
1421         int result;
1422         int sent = 0;
1423
1424         spin_lock_irqsave(&info->lock, flags);
1425         if (info->flags & THROTTLED) {
1426                 spin_unlock_irqrestore(&info->lock, flags);
1427                 return;
1428         }
1429
1430         list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
1431                 list_del(tmp);
1432                 spin_unlock_irqrestore(&info->lock, flags);
1433
1434                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
1435                 urb = wrap->urb;
1436
1437                 if (tty && urb->actual_length) {
1438                         if (urb->actual_length > TTY_FLIPBUF_SIZE - tty->flip.count) {
1439                                 spin_lock_irqsave(&info->lock, flags);
1440                                 list_add(tmp, &info->rx_urb_q);
1441                                 spin_unlock_irqrestore(&info->lock, flags);
1442                                 tty_flip_buffer_push(tty);
1443                                 schedule_work(&info->rx_work);
1444                                 return;
1445                         }
1446
1447                         memcpy(tty->flip.char_buf_ptr, urb->transfer_buffer, urb->actual_length);
1448                         tty->flip.char_buf_ptr += urb->actual_length;
1449                         tty->flip.count += urb->actual_length;
1450                         sent += urb->actual_length;
1451                 }
1452
1453                 urb->dev = port->serial->dev;
1454                 result = usb_submit_urb(urb, GFP_ATOMIC);
1455                 if (result) {
1456                         err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1457                         spin_lock_irqsave(&info->lock, flags);
1458                         list_add(tmp, &info->rx_urbs_free);
1459                         continue;
1460                 }
1461
1462                 spin_lock_irqsave(&info->lock, flags);
1463                 list_add(tmp, &info->rx_urbs_submitted);
1464         }
1465         spin_unlock_irqrestore(&info->lock, flags);
1466
1467         if (sent)
1468                 tty_flip_buffer_push(tty);
1469 }
1470
1471
1472 /*****************************************************************************
1473  * Connect Tech's White Heat module functions
1474  *****************************************************************************/
1475 static int __init whiteheat_init (void)
1476 {
1477         int retval;
1478         retval = usb_serial_register(&whiteheat_fake_device);
1479         if (retval)
1480                 goto failed_fake_register;
1481         retval = usb_serial_register(&whiteheat_device);
1482         if (retval)
1483                 goto failed_device_register;
1484         retval = usb_register(&whiteheat_driver);
1485         if (retval)
1486                 goto failed_usb_register;
1487         info(DRIVER_DESC " " DRIVER_VERSION);
1488         return 0;
1489 failed_usb_register:
1490         usb_serial_deregister(&whiteheat_device);
1491 failed_device_register:
1492         usb_serial_deregister(&whiteheat_fake_device);
1493 failed_fake_register:
1494         return retval;
1495 }
1496
1497
1498 static void __exit whiteheat_exit (void)
1499 {
1500         usb_deregister (&whiteheat_driver);
1501         usb_serial_deregister (&whiteheat_fake_device);
1502         usb_serial_deregister (&whiteheat_device);
1503 }
1504
1505
1506 module_init(whiteheat_init);
1507 module_exit(whiteheat_exit);
1508
1509 MODULE_AUTHOR( DRIVER_AUTHOR );
1510 MODULE_DESCRIPTION( DRIVER_DESC );
1511 MODULE_LICENSE("GPL");
1512
1513 module_param(urb_pool_size, int, 0);
1514 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
1515
1516 module_param(debug, bool, S_IRUGO | S_IWUSR);
1517 MODULE_PARM_DESC(debug, "Debug enabled or not");