kfifo: cleanup namespace
[linux-2.6.git] / drivers / char / nozomi.c
1 /*
2  * nozomi.c  -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
3  *
4  * Written by: Ulf Jakobsson,
5  *             Jan Ã…kerfeldt,
6  *             Stefan Thomasson,
7  *
8  * Maintained by: Paul Hardwick (p.hardwick@option.com)
9  *
10  * Patches:
11  *          Locking code changes for Vodafone by Sphere Systems Ltd,
12  *                              Andrew Bird (ajb@spheresystems.co.uk )
13  *                              & Phil Sanderson
14  *
15  * Source has been ported from an implementation made by Filip Aben @ Option
16  *
17  * --------------------------------------------------------------------------
18  *
19  * Copyright (c) 2005,2006 Option Wireless Sweden AB
20  * Copyright (c) 2006 Sphere Systems Ltd
21  * Copyright (c) 2006 Option Wireless n/v
22  * All rights Reserved.
23  *
24  * This program is free software; you can redistribute it and/or modify
25  * it under the terms of the GNU General Public License as published by
26  * the Free Software Foundation; either version 2 of the License, or
27  * (at your option) any later version.
28  *
29  * This program is distributed in the hope that it will be useful,
30  * but WITHOUT ANY WARRANTY; without even the implied warranty of
31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
32  * GNU General Public License for more details.
33  *
34  * You should have received a copy of the GNU General Public License
35  * along with this program; if not, write to the Free Software
36  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
37  *
38  * --------------------------------------------------------------------------
39  */
40
41 /* Enable this to have a lot of debug printouts */
42 #define DEBUG
43
44 #include <linux/kernel.h>
45 #include <linux/module.h>
46 #include <linux/pci.h>
47 #include <linux/ioport.h>
48 #include <linux/tty.h>
49 #include <linux/tty_driver.h>
50 #include <linux/tty_flip.h>
51 #include <linux/sched.h>
52 #include <linux/serial.h>
53 #include <linux/interrupt.h>
54 #include <linux/kmod.h>
55 #include <linux/init.h>
56 #include <linux/kfifo.h>
57 #include <linux/uaccess.h>
58 #include <asm/byteorder.h>
59
60 #include <linux/delay.h>
61
62
63 #define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \
64                                         __DATE__ " " __TIME__ ")"
65
66 /*    Macros definitions */
67
68 /* Default debug printout level */
69 #define NOZOMI_DEBUG_LEVEL 0x00
70
71 #define P_BUF_SIZE 128
72 #define NFO(_err_flag_, args...)                                \
73 do {                                                            \
74         char tmp[P_BUF_SIZE];                                   \
75         snprintf(tmp, sizeof(tmp), ##args);                     \
76         printk(_err_flag_ "[%d] %s(): %s\n", __LINE__,          \
77                 __func__, tmp);                         \
78 } while (0)
79
80 #define DBG1(args...) D_(0x01, ##args)
81 #define DBG2(args...) D_(0x02, ##args)
82 #define DBG3(args...) D_(0x04, ##args)
83 #define DBG4(args...) D_(0x08, ##args)
84 #define DBG5(args...) D_(0x10, ##args)
85 #define DBG6(args...) D_(0x20, ##args)
86 #define DBG7(args...) D_(0x40, ##args)
87 #define DBG8(args...) D_(0x80, ##args)
88
89 #ifdef DEBUG
90 /* Do we need this settable at runtime? */
91 static int debug = NOZOMI_DEBUG_LEVEL;
92
93 #define D(lvl, args...)  do \
94                         {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
95                         while (0)
96 #define D_(lvl, args...) D(lvl, ##args)
97
98 /* These printouts are always printed */
99
100 #else
101 static int debug;
102 #define D_(lvl, args...)
103 #endif
104
105 /* TODO: rewrite to optimize macros... */
106
107 #define TMP_BUF_MAX 256
108
109 #define DUMP(buf__,len__) \
110   do {  \
111     char tbuf[TMP_BUF_MAX] = {0};\
112     if (len__ > 1) {\
113         snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
114         if (tbuf[len__-2] == '\r') {\
115                 tbuf[len__-2] = 'r';\
116         } \
117         DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
118     } else {\
119         DBG1("SENDING: '%s' (%d)", tbuf, len__);\
120     } \
121 } while (0)
122
123 /*    Defines */
124 #define NOZOMI_NAME             "nozomi"
125 #define NOZOMI_NAME_TTY         "nozomi_tty"
126 #define DRIVER_DESC             "Nozomi driver"
127
128 #define NTTY_TTY_MAXMINORS      256
129 #define NTTY_FIFO_BUFFER_SIZE   8192
130
131 /* Must be power of 2 */
132 #define FIFO_BUFFER_SIZE_UL     8192
133
134 /* Size of tmp send buffer to card */
135 #define SEND_BUF_MAX            1024
136 #define RECEIVE_BUF_MAX         4
137
138
139 /* Define all types of vendors and devices to support */
140 #define VENDOR1         0x1931  /* Vendor Option */
141 #define DEVICE1         0x000c  /* HSDPA card */
142
143 #define R_IIR           0x0000  /* Interrupt Identity Register */
144 #define R_FCR           0x0000  /* Flow Control Register */
145 #define R_IER           0x0004  /* Interrupt Enable Register */
146
147 #define CONFIG_MAGIC    0xEFEFFEFE
148 #define TOGGLE_VALID    0x0000
149
150 /* Definition of interrupt tokens */
151 #define MDM_DL1         0x0001
152 #define MDM_UL1         0x0002
153 #define MDM_DL2         0x0004
154 #define MDM_UL2         0x0008
155 #define DIAG_DL1        0x0010
156 #define DIAG_DL2        0x0020
157 #define DIAG_UL         0x0040
158 #define APP1_DL         0x0080
159 #define APP1_UL         0x0100
160 #define APP2_DL         0x0200
161 #define APP2_UL         0x0400
162 #define CTRL_DL         0x0800
163 #define CTRL_UL         0x1000
164 #define RESET           0x8000
165
166 #define MDM_DL          (MDM_DL1  | MDM_DL2)
167 #define MDM_UL          (MDM_UL1  | MDM_UL2)
168 #define DIAG_DL         (DIAG_DL1 | DIAG_DL2)
169
170 /* modem signal definition */
171 #define CTRL_DSR        0x0001
172 #define CTRL_DCD        0x0002
173 #define CTRL_RI         0x0004
174 #define CTRL_CTS        0x0008
175
176 #define CTRL_DTR        0x0001
177 #define CTRL_RTS        0x0002
178
179 #define MAX_PORT                4
180 #define NOZOMI_MAX_PORTS        5
181 #define NOZOMI_MAX_CARDS        (NTTY_TTY_MAXMINORS / MAX_PORT)
182
183 /*    Type definitions */
184
185 /*
186  * There are two types of nozomi cards,
187  * one with 2048 memory and with 8192 memory
188  */
189 enum card_type {
190         F32_2 = 2048,   /* 512 bytes downlink + uplink * 2 -> 2048 */
191         F32_8 = 8192,   /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
192 };
193
194 /* Initialization states a card can be in */
195 enum card_state {
196         NOZOMI_STATE_UKNOWN     = 0,
197         NOZOMI_STATE_ENABLED    = 1,    /* pci device enabled */
198         NOZOMI_STATE_ALLOCATED  = 2,    /* config setup done */
199         NOZOMI_STATE_READY      = 3,    /* flowcontrols received */
200 };
201
202 /* Two different toggle channels exist */
203 enum channel_type {
204         CH_A = 0,
205         CH_B = 1,
206 };
207
208 /* Port definition for the card regarding flow control */
209 enum ctrl_port_type {
210         CTRL_CMD        = 0,
211         CTRL_MDM        = 1,
212         CTRL_DIAG       = 2,
213         CTRL_APP1       = 3,
214         CTRL_APP2       = 4,
215         CTRL_ERROR      = -1,
216 };
217
218 /* Ports that the nozomi has */
219 enum port_type {
220         PORT_MDM        = 0,
221         PORT_DIAG       = 1,
222         PORT_APP1       = 2,
223         PORT_APP2       = 3,
224         PORT_CTRL       = 4,
225         PORT_ERROR      = -1,
226 };
227
228 #ifdef __BIG_ENDIAN
229 /* Big endian */
230
231 struct toggles {
232         unsigned int enabled:5; /*
233                                  * Toggle fields are valid if enabled is 0,
234                                  * else A-channels must always be used.
235                                  */
236         unsigned int diag_dl:1;
237         unsigned int mdm_dl:1;
238         unsigned int mdm_ul:1;
239 } __attribute__ ((packed));
240
241 /* Configuration table to read at startup of card */
242 /* Is for now only needed during initialization phase */
243 struct config_table {
244         u32 signature;
245         u16 product_information;
246         u16 version;
247         u8 pad3[3];
248         struct toggles toggle;
249         u8 pad1[4];
250         u16 dl_mdm_len1;        /*
251                                  * If this is 64, it can hold
252                                  * 60 bytes + 4 that is length field
253                                  */
254         u16 dl_start;
255
256         u16 dl_diag_len1;
257         u16 dl_mdm_len2;        /*
258                                  * If this is 64, it can hold
259                                  * 60 bytes + 4 that is length field
260                                  */
261         u16 dl_app1_len;
262
263         u16 dl_diag_len2;
264         u16 dl_ctrl_len;
265         u16 dl_app2_len;
266         u8 pad2[16];
267         u16 ul_mdm_len1;
268         u16 ul_start;
269         u16 ul_diag_len;
270         u16 ul_mdm_len2;
271         u16 ul_app1_len;
272         u16 ul_app2_len;
273         u16 ul_ctrl_len;
274 } __attribute__ ((packed));
275
276 /* This stores all control downlink flags */
277 struct ctrl_dl {
278         u8 port;
279         unsigned int reserved:4;
280         unsigned int CTS:1;
281         unsigned int RI:1;
282         unsigned int DCD:1;
283         unsigned int DSR:1;
284 } __attribute__ ((packed));
285
286 /* This stores all control uplink flags */
287 struct ctrl_ul {
288         u8 port;
289         unsigned int reserved:6;
290         unsigned int RTS:1;
291         unsigned int DTR:1;
292 } __attribute__ ((packed));
293
294 #else
295 /* Little endian */
296
297 /* This represents the toggle information */
298 struct toggles {
299         unsigned int mdm_ul:1;
300         unsigned int mdm_dl:1;
301         unsigned int diag_dl:1;
302         unsigned int enabled:5; /*
303                                  * Toggle fields are valid if enabled is 0,
304                                  * else A-channels must always be used.
305                                  */
306 } __attribute__ ((packed));
307
308 /* Configuration table to read at startup of card */
309 struct config_table {
310         u32 signature;
311         u16 version;
312         u16 product_information;
313         struct toggles toggle;
314         u8 pad1[7];
315         u16 dl_start;
316         u16 dl_mdm_len1;        /*
317                                  * If this is 64, it can hold
318                                  * 60 bytes + 4 that is length field
319                                  */
320         u16 dl_mdm_len2;
321         u16 dl_diag_len1;
322         u16 dl_diag_len2;
323         u16 dl_app1_len;
324         u16 dl_app2_len;
325         u16 dl_ctrl_len;
326         u8 pad2[16];
327         u16 ul_start;
328         u16 ul_mdm_len2;
329         u16 ul_mdm_len1;
330         u16 ul_diag_len;
331         u16 ul_app1_len;
332         u16 ul_app2_len;
333         u16 ul_ctrl_len;
334 } __attribute__ ((packed));
335
336 /* This stores all control downlink flags */
337 struct ctrl_dl {
338         unsigned int DSR:1;
339         unsigned int DCD:1;
340         unsigned int RI:1;
341         unsigned int CTS:1;
342         unsigned int reserverd:4;
343         u8 port;
344 } __attribute__ ((packed));
345
346 /* This stores all control uplink flags */
347 struct ctrl_ul {
348         unsigned int DTR:1;
349         unsigned int RTS:1;
350         unsigned int reserved:6;
351         u8 port;
352 } __attribute__ ((packed));
353 #endif
354
355 /* This holds all information that is needed regarding a port */
356 struct port {
357         struct tty_port port;
358         u8 update_flow_control;
359         struct ctrl_ul ctrl_ul;
360         struct ctrl_dl ctrl_dl;
361         struct kfifo fifo_ul;
362         void __iomem *dl_addr[2];
363         u32 dl_size[2];
364         u8 toggle_dl;
365         void __iomem *ul_addr[2];
366         u32 ul_size[2];
367         u8 toggle_ul;
368         u16 token_dl;
369
370         /* mutex to ensure one access patch to this port */
371         struct mutex tty_sem;
372         wait_queue_head_t tty_wait;
373         struct async_icount tty_icount;
374 };
375
376 /* Private data one for each card in the system */
377 struct nozomi {
378         void __iomem *base_addr;
379         unsigned long flip;
380
381         /* Pointers to registers */
382         void __iomem *reg_iir;
383         void __iomem *reg_fcr;
384         void __iomem *reg_ier;
385
386         u16 last_ier;
387         enum card_type card_type;
388         struct config_table config_table;       /* Configuration table */
389         struct pci_dev *pdev;
390         struct port port[NOZOMI_MAX_PORTS];
391         u8 *send_buf;
392
393         spinlock_t spin_mutex;  /* secures access to registers and tty */
394
395         unsigned int index_start;
396         enum card_state state;
397         u32 open_ttys;
398 };
399
400 /* This is a data packet that is read or written to/from card */
401 struct buffer {
402         u32 size;               /* size is the length of the data buffer */
403         u8 *data;
404 } __attribute__ ((packed));
405
406 /*    Global variables */
407 static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
408         {PCI_DEVICE(VENDOR1, DEVICE1)},
409         {},
410 };
411
412 MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
413
414 static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
415 static struct tty_driver *ntty_driver;
416
417 /*
418  * find card by tty_index
419  */
420 static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
421 {
422         return tty ? ndevs[tty->index / MAX_PORT] : NULL;
423 }
424
425 static inline struct port *get_port_by_tty(const struct tty_struct *tty)
426 {
427         struct nozomi *ndev = get_dc_by_tty(tty);
428         return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
429 }
430
431 /*
432  * TODO:
433  * -Optimize
434  * -Rewrite cleaner
435  */
436
437 static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
438                         u32 size_bytes)
439 {
440         u32 i = 0;
441         const u32 __iomem *ptr = mem_addr_start;
442         u16 *buf16;
443
444         if (unlikely(!ptr || !buf))
445                 goto out;
446
447         /* shortcut for extremely often used cases */
448         switch (size_bytes) {
449         case 2: /* 2 bytes */
450                 buf16 = (u16 *) buf;
451                 *buf16 = __le16_to_cpu(readw(ptr));
452                 goto out;
453                 break;
454         case 4: /* 4 bytes */
455                 *(buf) = __le32_to_cpu(readl(ptr));
456                 goto out;
457                 break;
458         }
459
460         while (i < size_bytes) {
461                 if (size_bytes - i == 2) {
462                         /* Handle 2 bytes in the end */
463                         buf16 = (u16 *) buf;
464                         *(buf16) = __le16_to_cpu(readw(ptr));
465                         i += 2;
466                 } else {
467                         /* Read 4 bytes */
468                         *(buf) = __le32_to_cpu(readl(ptr));
469                         i += 4;
470                 }
471                 buf++;
472                 ptr++;
473         }
474 out:
475         return;
476 }
477
478 /*
479  * TODO:
480  * -Optimize
481  * -Rewrite cleaner
482  */
483 static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
484                         u32 size_bytes)
485 {
486         u32 i = 0;
487         u32 __iomem *ptr = mem_addr_start;
488         const u16 *buf16;
489
490         if (unlikely(!ptr || !buf))
491                 return 0;
492
493         /* shortcut for extremely often used cases */
494         switch (size_bytes) {
495         case 2: /* 2 bytes */
496                 buf16 = (const u16 *)buf;
497                 writew(__cpu_to_le16(*buf16), ptr);
498                 return 2;
499                 break;
500         case 1: /*
501                  * also needs to write 4 bytes in this case
502                  * so falling through..
503                  */
504         case 4: /* 4 bytes */
505                 writel(__cpu_to_le32(*buf), ptr);
506                 return 4;
507                 break;
508         }
509
510         while (i < size_bytes) {
511                 if (size_bytes - i == 2) {
512                         /* 2 bytes */
513                         buf16 = (const u16 *)buf;
514                         writew(__cpu_to_le16(*buf16), ptr);
515                         i += 2;
516                 } else {
517                         /* 4 bytes */
518                         writel(__cpu_to_le32(*buf), ptr);
519                         i += 4;
520                 }
521                 buf++;
522                 ptr++;
523         }
524         return i;
525 }
526
527 /* Setup pointers to different channels and also setup buffer sizes. */
528 static void setup_memory(struct nozomi *dc)
529 {
530         void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
531         /* The length reported is including the length field of 4 bytes,
532          * hence subtract with 4.
533          */
534         const u16 buff_offset = 4;
535
536         /* Modem port dl configuration */
537         dc->port[PORT_MDM].dl_addr[CH_A] = offset;
538         dc->port[PORT_MDM].dl_addr[CH_B] =
539                                 (offset += dc->config_table.dl_mdm_len1);
540         dc->port[PORT_MDM].dl_size[CH_A] =
541                                 dc->config_table.dl_mdm_len1 - buff_offset;
542         dc->port[PORT_MDM].dl_size[CH_B] =
543                                 dc->config_table.dl_mdm_len2 - buff_offset;
544
545         /* Diag port dl configuration */
546         dc->port[PORT_DIAG].dl_addr[CH_A] =
547                                 (offset += dc->config_table.dl_mdm_len2);
548         dc->port[PORT_DIAG].dl_size[CH_A] =
549                                 dc->config_table.dl_diag_len1 - buff_offset;
550         dc->port[PORT_DIAG].dl_addr[CH_B] =
551                                 (offset += dc->config_table.dl_diag_len1);
552         dc->port[PORT_DIAG].dl_size[CH_B] =
553                                 dc->config_table.dl_diag_len2 - buff_offset;
554
555         /* App1 port dl configuration */
556         dc->port[PORT_APP1].dl_addr[CH_A] =
557                                 (offset += dc->config_table.dl_diag_len2);
558         dc->port[PORT_APP1].dl_size[CH_A] =
559                                 dc->config_table.dl_app1_len - buff_offset;
560
561         /* App2 port dl configuration */
562         dc->port[PORT_APP2].dl_addr[CH_A] =
563                                 (offset += dc->config_table.dl_app1_len);
564         dc->port[PORT_APP2].dl_size[CH_A] =
565                                 dc->config_table.dl_app2_len - buff_offset;
566
567         /* Ctrl dl configuration */
568         dc->port[PORT_CTRL].dl_addr[CH_A] =
569                                 (offset += dc->config_table.dl_app2_len);
570         dc->port[PORT_CTRL].dl_size[CH_A] =
571                                 dc->config_table.dl_ctrl_len - buff_offset;
572
573         offset = dc->base_addr + dc->config_table.ul_start;
574
575         /* Modem Port ul configuration */
576         dc->port[PORT_MDM].ul_addr[CH_A] = offset;
577         dc->port[PORT_MDM].ul_size[CH_A] =
578                                 dc->config_table.ul_mdm_len1 - buff_offset;
579         dc->port[PORT_MDM].ul_addr[CH_B] =
580                                 (offset += dc->config_table.ul_mdm_len1);
581         dc->port[PORT_MDM].ul_size[CH_B] =
582                                 dc->config_table.ul_mdm_len2 - buff_offset;
583
584         /* Diag port ul configuration */
585         dc->port[PORT_DIAG].ul_addr[CH_A] =
586                                 (offset += dc->config_table.ul_mdm_len2);
587         dc->port[PORT_DIAG].ul_size[CH_A] =
588                                 dc->config_table.ul_diag_len - buff_offset;
589
590         /* App1 port ul configuration */
591         dc->port[PORT_APP1].ul_addr[CH_A] =
592                                 (offset += dc->config_table.ul_diag_len);
593         dc->port[PORT_APP1].ul_size[CH_A] =
594                                 dc->config_table.ul_app1_len - buff_offset;
595
596         /* App2 port ul configuration */
597         dc->port[PORT_APP2].ul_addr[CH_A] =
598                                 (offset += dc->config_table.ul_app1_len);
599         dc->port[PORT_APP2].ul_size[CH_A] =
600                                 dc->config_table.ul_app2_len - buff_offset;
601
602         /* Ctrl ul configuration */
603         dc->port[PORT_CTRL].ul_addr[CH_A] =
604                                 (offset += dc->config_table.ul_app2_len);
605         dc->port[PORT_CTRL].ul_size[CH_A] =
606                                 dc->config_table.ul_ctrl_len - buff_offset;
607 }
608
609 /* Dump config table under initalization phase */
610 #ifdef DEBUG
611 static void dump_table(const struct nozomi *dc)
612 {
613         DBG3("signature: 0x%08X", dc->config_table.signature);
614         DBG3("version: 0x%04X", dc->config_table.version);
615         DBG3("product_information: 0x%04X", \
616                                 dc->config_table.product_information);
617         DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
618         DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
619         DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
620         DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
621
622         DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
623         DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
624            dc->config_table.dl_mdm_len1);
625         DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
626            dc->config_table.dl_mdm_len2);
627         DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
628            dc->config_table.dl_diag_len1);
629         DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
630            dc->config_table.dl_diag_len2);
631         DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
632            dc->config_table.dl_app1_len);
633         DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
634            dc->config_table.dl_app2_len);
635         DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
636            dc->config_table.dl_ctrl_len);
637         DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
638            dc->config_table.ul_start);
639         DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
640            dc->config_table.ul_mdm_len1);
641         DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
642            dc->config_table.ul_mdm_len2);
643         DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
644            dc->config_table.ul_diag_len);
645         DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
646            dc->config_table.ul_app1_len);
647         DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
648            dc->config_table.ul_app2_len);
649         DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
650            dc->config_table.ul_ctrl_len);
651 }
652 #else
653 static inline void dump_table(const struct nozomi *dc) { }
654 #endif
655
656 /*
657  * Read configuration table from card under intalization phase
658  * Returns 1 if ok, else 0
659  */
660 static int nozomi_read_config_table(struct nozomi *dc)
661 {
662         read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
663                                                 sizeof(struct config_table));
664
665         if (dc->config_table.signature != CONFIG_MAGIC) {
666                 dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
667                         dc->config_table.signature, CONFIG_MAGIC);
668                 return 0;
669         }
670
671         if ((dc->config_table.version == 0)
672             || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
673                 int i;
674                 DBG1("Second phase, configuring card");
675
676                 setup_memory(dc);
677
678                 dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
679                 dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
680                 dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
681                 DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
682                    dc->port[PORT_MDM].toggle_ul,
683                    dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
684
685                 dump_table(dc);
686
687                 for (i = PORT_MDM; i < MAX_PORT; i++) {
688                         kfifo_alloc(&dc->port[i].fifo_ul,
689                                 FIFO_BUFFER_SIZE_UL, GFP_ATOMIC);
690                         memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
691                         memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
692                 }
693
694                 /* Enable control channel */
695                 dc->last_ier = dc->last_ier | CTRL_DL;
696                 writew(dc->last_ier, dc->reg_ier);
697
698                 dc->state = NOZOMI_STATE_ALLOCATED;
699                 dev_info(&dc->pdev->dev, "Initialization OK!\n");
700                 return 1;
701         }
702
703         if ((dc->config_table.version > 0)
704             && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
705                 u32 offset = 0;
706                 DBG1("First phase: pushing upload buffers, clearing download");
707
708                 dev_info(&dc->pdev->dev, "Version of card: %d\n",
709                          dc->config_table.version);
710
711                 /* Here we should disable all I/O over F32. */
712                 setup_memory(dc);
713
714                 /*
715                  * We should send ALL channel pair tokens back along
716                  * with reset token
717                  */
718
719                 /* push upload modem buffers */
720                 write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
721                         (u32 *) &offset, 4);
722                 write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
723                         (u32 *) &offset, 4);
724
725                 writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
726
727                 DBG1("First phase done");
728         }
729
730         return 1;
731 }
732
733 /* Enable uplink interrupts  */
734 static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
735 {
736         static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
737
738         if (port < NOZOMI_MAX_PORTS) {
739                 dc->last_ier |= mask[port];
740                 writew(dc->last_ier, dc->reg_ier);
741         } else {
742                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
743         }
744 }
745
746 /* Disable uplink interrupts  */
747 static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
748 {
749         static const u16 mask[] =
750                 {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
751
752         if (port < NOZOMI_MAX_PORTS) {
753                 dc->last_ier &= mask[port];
754                 writew(dc->last_ier, dc->reg_ier);
755         } else {
756                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
757         }
758 }
759
760 /* Enable downlink interrupts */
761 static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
762 {
763         static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
764
765         if (port < NOZOMI_MAX_PORTS) {
766                 dc->last_ier |= mask[port];
767                 writew(dc->last_ier, dc->reg_ier);
768         } else {
769                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
770         }
771 }
772
773 /* Disable downlink interrupts */
774 static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
775 {
776         static const u16 mask[] =
777                 {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
778
779         if (port < NOZOMI_MAX_PORTS) {
780                 dc->last_ier &= mask[port];
781                 writew(dc->last_ier, dc->reg_ier);
782         } else {
783                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
784         }
785 }
786
787 /*
788  * Return 1 - send buffer to card and ack.
789  * Return 0 - don't ack, don't send buffer to card.
790  */
791 static int send_data(enum port_type index, struct nozomi *dc)
792 {
793         u32 size = 0;
794         struct port *port = &dc->port[index];
795         const u8 toggle = port->toggle_ul;
796         void __iomem *addr = port->ul_addr[toggle];
797         const u32 ul_size = port->ul_size[toggle];
798         struct tty_struct *tty = tty_port_tty_get(&port->port);
799
800         /* Get data from tty and place in buf for now */
801         size = kfifo_get(&port->fifo_ul, dc->send_buf,
802                            ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
803
804         if (size == 0) {
805                 DBG4("No more data to send, disable link:");
806                 tty_kref_put(tty);
807                 return 0;
808         }
809
810         /* DUMP(buf, size); */
811
812         /* Write length + data */
813         write_mem32(addr, (u32 *) &size, 4);
814         write_mem32(addr + 4, (u32 *) dc->send_buf, size);
815
816         if (tty)
817                 tty_wakeup(tty);
818
819         tty_kref_put(tty);
820         return 1;
821 }
822
823 /* If all data has been read, return 1, else 0 */
824 static int receive_data(enum port_type index, struct nozomi *dc)
825 {
826         u8 buf[RECEIVE_BUF_MAX] = { 0 };
827         int size;
828         u32 offset = 4;
829         struct port *port = &dc->port[index];
830         void __iomem *addr = port->dl_addr[port->toggle_dl];
831         struct tty_struct *tty = tty_port_tty_get(&port->port);
832         int i, ret;
833
834         if (unlikely(!tty)) {
835                 DBG1("tty not open for port: %d?", index);
836                 return 1;
837         }
838
839         read_mem32((u32 *) &size, addr, 4);
840         /*  DBG1( "%d bytes port: %d", size, index); */
841
842         if (test_bit(TTY_THROTTLED, &tty->flags)) {
843                 DBG1("No room in tty, don't read data, don't ack interrupt, "
844                         "disable interrupt");
845
846                 /* disable interrupt in downlink... */
847                 disable_transmit_dl(index, dc);
848                 ret = 0;
849                 goto put;
850         }
851
852         if (unlikely(size == 0)) {
853                 dev_err(&dc->pdev->dev, "size == 0?\n");
854                 ret = 1;
855                 goto put;
856         }
857
858         tty_buffer_request_room(tty, size);
859
860         while (size > 0) {
861                 read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
862
863                 if (size == 1) {
864                         tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
865                         size = 0;
866                 } else if (size < RECEIVE_BUF_MAX) {
867                         size -= tty_insert_flip_string(tty, (char *) buf, size);
868                 } else {
869                         i = tty_insert_flip_string(tty, \
870                                                 (char *) buf, RECEIVE_BUF_MAX);
871                         size -= i;
872                         offset += i;
873                 }
874         }
875
876         set_bit(index, &dc->flip);
877         ret = 1;
878 put:
879         tty_kref_put(tty);
880         return ret;
881 }
882
883 /* Debug for interrupts */
884 #ifdef DEBUG
885 static char *interrupt2str(u16 interrupt)
886 {
887         static char buf[TMP_BUF_MAX];
888         char *p = buf;
889
890         interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
891         interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
892                                         "MDM_DL2 ") : NULL;
893
894         interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
895                                         "MDM_UL1 ") : NULL;
896         interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
897                                         "MDM_UL2 ") : NULL;
898
899         interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
900                                         "DIAG_DL1 ") : NULL;
901         interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
902                                         "DIAG_DL2 ") : NULL;
903
904         interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
905                                         "DIAG_UL ") : NULL;
906
907         interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
908                                         "APP1_DL ") : NULL;
909         interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
910                                         "APP2_DL ") : NULL;
911
912         interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
913                                         "APP1_UL ") : NULL;
914         interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
915                                         "APP2_UL ") : NULL;
916
917         interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
918                                         "CTRL_DL ") : NULL;
919         interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
920                                         "CTRL_UL ") : NULL;
921
922         interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
923                                         "RESET ") : NULL;
924
925         return buf;
926 }
927 #endif
928
929 /*
930  * Receive flow control
931  * Return 1 - If ok, else 0
932  */
933 static int receive_flow_control(struct nozomi *dc)
934 {
935         enum port_type port = PORT_MDM;
936         struct ctrl_dl ctrl_dl;
937         struct ctrl_dl old_ctrl;
938         u16 enable_ier = 0;
939
940         read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
941
942         switch (ctrl_dl.port) {
943         case CTRL_CMD:
944                 DBG1("The Base Band sends this value as a response to a "
945                         "request for IMSI detach sent over the control "
946                         "channel uplink (see section 7.6.1).");
947                 break;
948         case CTRL_MDM:
949                 port = PORT_MDM;
950                 enable_ier = MDM_DL;
951                 break;
952         case CTRL_DIAG:
953                 port = PORT_DIAG;
954                 enable_ier = DIAG_DL;
955                 break;
956         case CTRL_APP1:
957                 port = PORT_APP1;
958                 enable_ier = APP1_DL;
959                 break;
960         case CTRL_APP2:
961                 port = PORT_APP2;
962                 enable_ier = APP2_DL;
963                 if (dc->state == NOZOMI_STATE_ALLOCATED) {
964                         /*
965                          * After card initialization the flow control
966                          * received for APP2 is always the last
967                          */
968                         dc->state = NOZOMI_STATE_READY;
969                         dev_info(&dc->pdev->dev, "Device READY!\n");
970                 }
971                 break;
972         default:
973                 dev_err(&dc->pdev->dev,
974                         "ERROR: flow control received for non-existing port\n");
975                 return 0;
976         };
977
978         DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
979            *((u16 *)&ctrl_dl));
980
981         old_ctrl = dc->port[port].ctrl_dl;
982         dc->port[port].ctrl_dl = ctrl_dl;
983
984         if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
985                 DBG1("Disable interrupt (0x%04X) on port: %d",
986                         enable_ier, port);
987                 disable_transmit_ul(port, dc);
988
989         } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
990
991                 if (kfifo_len(&dc->port[port].fifo_ul)) {
992                         DBG1("Enable interrupt (0x%04X) on port: %d",
993                                 enable_ier, port);
994                         DBG1("Data in buffer [%d], enable transmit! ",
995                                 kfifo_len(&dc->port[port].fifo_ul));
996                         enable_transmit_ul(port, dc);
997                 } else {
998                         DBG1("No data in buffer...");
999                 }
1000         }
1001
1002         if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
1003                 DBG1(" No change in mctrl");
1004                 return 1;
1005         }
1006         /* Update statistics */
1007         if (old_ctrl.CTS != ctrl_dl.CTS)
1008                 dc->port[port].tty_icount.cts++;
1009         if (old_ctrl.DSR != ctrl_dl.DSR)
1010                 dc->port[port].tty_icount.dsr++;
1011         if (old_ctrl.RI != ctrl_dl.RI)
1012                 dc->port[port].tty_icount.rng++;
1013         if (old_ctrl.DCD != ctrl_dl.DCD)
1014                 dc->port[port].tty_icount.dcd++;
1015
1016         wake_up_interruptible(&dc->port[port].tty_wait);
1017
1018         DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
1019            port,
1020            dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
1021            dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
1022
1023         return 1;
1024 }
1025
1026 static enum ctrl_port_type port2ctrl(enum port_type port,
1027                                         const struct nozomi *dc)
1028 {
1029         switch (port) {
1030         case PORT_MDM:
1031                 return CTRL_MDM;
1032         case PORT_DIAG:
1033                 return CTRL_DIAG;
1034         case PORT_APP1:
1035                 return CTRL_APP1;
1036         case PORT_APP2:
1037                 return CTRL_APP2;
1038         default:
1039                 dev_err(&dc->pdev->dev,
1040                         "ERROR: send flow control " \
1041                         "received for non-existing port\n");
1042         };
1043         return CTRL_ERROR;
1044 }
1045
1046 /*
1047  * Send flow control, can only update one channel at a time
1048  * Return 0 - If we have updated all flow control
1049  * Return 1 - If we need to update more flow control, ack current enable more
1050  */
1051 static int send_flow_control(struct nozomi *dc)
1052 {
1053         u32 i, more_flow_control_to_be_updated = 0;
1054         u16 *ctrl;
1055
1056         for (i = PORT_MDM; i < MAX_PORT; i++) {
1057                 if (dc->port[i].update_flow_control) {
1058                         if (more_flow_control_to_be_updated) {
1059                                 /* We have more flow control to be updated */
1060                                 return 1;
1061                         }
1062                         dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
1063                         ctrl = (u16 *)&dc->port[i].ctrl_ul;
1064                         write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
1065                                 (u32 *) ctrl, 2);
1066                         dc->port[i].update_flow_control = 0;
1067                         more_flow_control_to_be_updated = 1;
1068                 }
1069         }
1070         return 0;
1071 }
1072
1073 /*
1074  * Handle downlink data, ports that are handled are modem and diagnostics
1075  * Return 1 - ok
1076  * Return 0 - toggle fields are out of sync
1077  */
1078 static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
1079                         u16 read_iir, u16 mask1, u16 mask2)
1080 {
1081         if (*toggle == 0 && read_iir & mask1) {
1082                 if (receive_data(port, dc)) {
1083                         writew(mask1, dc->reg_fcr);
1084                         *toggle = !(*toggle);
1085                 }
1086
1087                 if (read_iir & mask2) {
1088                         if (receive_data(port, dc)) {
1089                                 writew(mask2, dc->reg_fcr);
1090                                 *toggle = !(*toggle);
1091                         }
1092                 }
1093         } else if (*toggle == 1 && read_iir & mask2) {
1094                 if (receive_data(port, dc)) {
1095                         writew(mask2, dc->reg_fcr);
1096                         *toggle = !(*toggle);
1097                 }
1098
1099                 if (read_iir & mask1) {
1100                         if (receive_data(port, dc)) {
1101                                 writew(mask1, dc->reg_fcr);
1102                                 *toggle = !(*toggle);
1103                         }
1104                 }
1105         } else {
1106                 dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
1107                         *toggle);
1108                 return 0;
1109         }
1110         return 1;
1111 }
1112
1113 /*
1114  * Handle uplink data, this is currently for the modem port
1115  * Return 1 - ok
1116  * Return 0 - toggle field are out of sync
1117  */
1118 static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
1119 {
1120         u8 *toggle = &(dc->port[port].toggle_ul);
1121
1122         if (*toggle == 0 && read_iir & MDM_UL1) {
1123                 dc->last_ier &= ~MDM_UL;
1124                 writew(dc->last_ier, dc->reg_ier);
1125                 if (send_data(port, dc)) {
1126                         writew(MDM_UL1, dc->reg_fcr);
1127                         dc->last_ier = dc->last_ier | MDM_UL;
1128                         writew(dc->last_ier, dc->reg_ier);
1129                         *toggle = !*toggle;
1130                 }
1131
1132                 if (read_iir & MDM_UL2) {
1133                         dc->last_ier &= ~MDM_UL;
1134                         writew(dc->last_ier, dc->reg_ier);
1135                         if (send_data(port, dc)) {
1136                                 writew(MDM_UL2, dc->reg_fcr);
1137                                 dc->last_ier = dc->last_ier | MDM_UL;
1138                                 writew(dc->last_ier, dc->reg_ier);
1139                                 *toggle = !*toggle;
1140                         }
1141                 }
1142
1143         } else if (*toggle == 1 && read_iir & MDM_UL2) {
1144                 dc->last_ier &= ~MDM_UL;
1145                 writew(dc->last_ier, dc->reg_ier);
1146                 if (send_data(port, dc)) {
1147                         writew(MDM_UL2, dc->reg_fcr);
1148                         dc->last_ier = dc->last_ier | MDM_UL;
1149                         writew(dc->last_ier, dc->reg_ier);
1150                         *toggle = !*toggle;
1151                 }
1152
1153                 if (read_iir & MDM_UL1) {
1154                         dc->last_ier &= ~MDM_UL;
1155                         writew(dc->last_ier, dc->reg_ier);
1156                         if (send_data(port, dc)) {
1157                                 writew(MDM_UL1, dc->reg_fcr);
1158                                 dc->last_ier = dc->last_ier | MDM_UL;
1159                                 writew(dc->last_ier, dc->reg_ier);
1160                                 *toggle = !*toggle;
1161                         }
1162                 }
1163         } else {
1164                 writew(read_iir & MDM_UL, dc->reg_fcr);
1165                 dev_err(&dc->pdev->dev, "port out of sync!\n");
1166                 return 0;
1167         }
1168         return 1;
1169 }
1170
1171 static irqreturn_t interrupt_handler(int irq, void *dev_id)
1172 {
1173         struct nozomi *dc = dev_id;
1174         unsigned int a;
1175         u16 read_iir;
1176
1177         if (!dc)
1178                 return IRQ_NONE;
1179
1180         spin_lock(&dc->spin_mutex);
1181         read_iir = readw(dc->reg_iir);
1182
1183         /* Card removed */
1184         if (read_iir == (u16)-1)
1185                 goto none;
1186         /*
1187          * Just handle interrupt enabled in IER
1188          * (by masking with dc->last_ier)
1189          */
1190         read_iir &= dc->last_ier;
1191
1192         if (read_iir == 0)
1193                 goto none;
1194
1195
1196         DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
1197                 dc->last_ier);
1198
1199         if (read_iir & RESET) {
1200                 if (unlikely(!nozomi_read_config_table(dc))) {
1201                         dc->last_ier = 0x0;
1202                         writew(dc->last_ier, dc->reg_ier);
1203                         dev_err(&dc->pdev->dev, "Could not read status from "
1204                                 "card, we should disable interface\n");
1205                 } else {
1206                         writew(RESET, dc->reg_fcr);
1207                 }
1208                 /* No more useful info if this was the reset interrupt. */
1209                 goto exit_handler;
1210         }
1211         if (read_iir & CTRL_UL) {
1212                 DBG1("CTRL_UL");
1213                 dc->last_ier &= ~CTRL_UL;
1214                 writew(dc->last_ier, dc->reg_ier);
1215                 if (send_flow_control(dc)) {
1216                         writew(CTRL_UL, dc->reg_fcr);
1217                         dc->last_ier = dc->last_ier | CTRL_UL;
1218                         writew(dc->last_ier, dc->reg_ier);
1219                 }
1220         }
1221         if (read_iir & CTRL_DL) {
1222                 receive_flow_control(dc);
1223                 writew(CTRL_DL, dc->reg_fcr);
1224         }
1225         if (read_iir & MDM_DL) {
1226                 if (!handle_data_dl(dc, PORT_MDM,
1227                                 &(dc->port[PORT_MDM].toggle_dl), read_iir,
1228                                 MDM_DL1, MDM_DL2)) {
1229                         dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
1230                         goto exit_handler;
1231                 }
1232         }
1233         if (read_iir & MDM_UL) {
1234                 if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
1235                         dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
1236                         goto exit_handler;
1237                 }
1238         }
1239         if (read_iir & DIAG_DL) {
1240                 if (!handle_data_dl(dc, PORT_DIAG,
1241                                 &(dc->port[PORT_DIAG].toggle_dl), read_iir,
1242                                 DIAG_DL1, DIAG_DL2)) {
1243                         dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
1244                         goto exit_handler;
1245                 }
1246         }
1247         if (read_iir & DIAG_UL) {
1248                 dc->last_ier &= ~DIAG_UL;
1249                 writew(dc->last_ier, dc->reg_ier);
1250                 if (send_data(PORT_DIAG, dc)) {
1251                         writew(DIAG_UL, dc->reg_fcr);
1252                         dc->last_ier = dc->last_ier | DIAG_UL;
1253                         writew(dc->last_ier, dc->reg_ier);
1254                 }
1255         }
1256         if (read_iir & APP1_DL) {
1257                 if (receive_data(PORT_APP1, dc))
1258                         writew(APP1_DL, dc->reg_fcr);
1259         }
1260         if (read_iir & APP1_UL) {
1261                 dc->last_ier &= ~APP1_UL;
1262                 writew(dc->last_ier, dc->reg_ier);
1263                 if (send_data(PORT_APP1, dc)) {
1264                         writew(APP1_UL, dc->reg_fcr);
1265                         dc->last_ier = dc->last_ier | APP1_UL;
1266                         writew(dc->last_ier, dc->reg_ier);
1267                 }
1268         }
1269         if (read_iir & APP2_DL) {
1270                 if (receive_data(PORT_APP2, dc))
1271                         writew(APP2_DL, dc->reg_fcr);
1272         }
1273         if (read_iir & APP2_UL) {
1274                 dc->last_ier &= ~APP2_UL;
1275                 writew(dc->last_ier, dc->reg_ier);
1276                 if (send_data(PORT_APP2, dc)) {
1277                         writew(APP2_UL, dc->reg_fcr);
1278                         dc->last_ier = dc->last_ier | APP2_UL;
1279                         writew(dc->last_ier, dc->reg_ier);
1280                 }
1281         }
1282
1283 exit_handler:
1284         spin_unlock(&dc->spin_mutex);
1285         for (a = 0; a < NOZOMI_MAX_PORTS; a++) {
1286                 struct tty_struct *tty;
1287                 if (test_and_clear_bit(a, &dc->flip)) {
1288                         tty = tty_port_tty_get(&dc->port[a].port);
1289                         if (tty)
1290                                 tty_flip_buffer_push(tty);
1291                         tty_kref_put(tty);
1292                 }
1293         }
1294         return IRQ_HANDLED;
1295 none:
1296         spin_unlock(&dc->spin_mutex);
1297         return IRQ_NONE;
1298 }
1299
1300 static void nozomi_get_card_type(struct nozomi *dc)
1301 {
1302         int i;
1303         u32 size = 0;
1304
1305         for (i = 0; i < 6; i++)
1306                 size += pci_resource_len(dc->pdev, i);
1307
1308         /* Assume card type F32_8 if no match */
1309         dc->card_type = size == 2048 ? F32_2 : F32_8;
1310
1311         dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
1312 }
1313
1314 static void nozomi_setup_private_data(struct nozomi *dc)
1315 {
1316         void __iomem *offset = dc->base_addr + dc->card_type / 2;
1317         unsigned int i;
1318
1319         dc->reg_fcr = (void __iomem *)(offset + R_FCR);
1320         dc->reg_iir = (void __iomem *)(offset + R_IIR);
1321         dc->reg_ier = (void __iomem *)(offset + R_IER);
1322         dc->last_ier = 0;
1323         dc->flip = 0;
1324
1325         dc->port[PORT_MDM].token_dl = MDM_DL;
1326         dc->port[PORT_DIAG].token_dl = DIAG_DL;
1327         dc->port[PORT_APP1].token_dl = APP1_DL;
1328         dc->port[PORT_APP2].token_dl = APP2_DL;
1329
1330         for (i = 0; i < MAX_PORT; i++)
1331                 init_waitqueue_head(&dc->port[i].tty_wait);
1332 }
1333
1334 static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
1335                           char *buf)
1336 {
1337         const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1338
1339         return sprintf(buf, "%d\n", dc->card_type);
1340 }
1341 static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
1342
1343 static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
1344                           char *buf)
1345 {
1346         const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1347
1348         return sprintf(buf, "%u\n", dc->open_ttys);
1349 }
1350 static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
1351
1352 static void make_sysfs_files(struct nozomi *dc)
1353 {
1354         if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
1355                 dev_err(&dc->pdev->dev,
1356                         "Could not create sysfs file for card_type\n");
1357         if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
1358                 dev_err(&dc->pdev->dev,
1359                         "Could not create sysfs file for open_ttys\n");
1360 }
1361
1362 static void remove_sysfs_files(struct nozomi *dc)
1363 {
1364         device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
1365         device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
1366 }
1367
1368 /* Allocate memory for one device */
1369 static int __devinit nozomi_card_init(struct pci_dev *pdev,
1370                                       const struct pci_device_id *ent)
1371 {
1372         resource_size_t start;
1373         int ret;
1374         struct nozomi *dc = NULL;
1375         int ndev_idx;
1376         int i;
1377
1378         dev_dbg(&pdev->dev, "Init, new card found\n");
1379
1380         for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
1381                 if (!ndevs[ndev_idx])
1382                         break;
1383
1384         if (ndev_idx >= ARRAY_SIZE(ndevs)) {
1385                 dev_err(&pdev->dev, "no free tty range for this card left\n");
1386                 ret = -EIO;
1387                 goto err;
1388         }
1389
1390         dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
1391         if (unlikely(!dc)) {
1392                 dev_err(&pdev->dev, "Could not allocate memory\n");
1393                 ret = -ENOMEM;
1394                 goto err_free;
1395         }
1396
1397         dc->pdev = pdev;
1398
1399         ret = pci_enable_device(dc->pdev);
1400         if (ret) {
1401                 dev_err(&pdev->dev, "Failed to enable PCI Device\n");
1402                 goto err_free;
1403         }
1404
1405         ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
1406         if (ret) {
1407                 dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
1408                         (int) /* nozomi_private.io_addr */ 0);
1409                 goto err_disable_device;
1410         }
1411
1412         start = pci_resource_start(dc->pdev, 0);
1413         if (start == 0) {
1414                 dev_err(&pdev->dev, "No I/O address for card detected\n");
1415                 ret = -ENODEV;
1416                 goto err_rel_regs;
1417         }
1418
1419         /* Find out what card type it is */
1420         nozomi_get_card_type(dc);
1421
1422         dc->base_addr = ioremap_nocache(start, dc->card_type);
1423         if (!dc->base_addr) {
1424                 dev_err(&pdev->dev, "Unable to map card MMIO\n");
1425                 ret = -ENODEV;
1426                 goto err_rel_regs;
1427         }
1428
1429         dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
1430         if (!dc->send_buf) {
1431                 dev_err(&pdev->dev, "Could not allocate send buffer?\n");
1432                 ret = -ENOMEM;
1433                 goto err_free_sbuf;
1434         }
1435
1436         spin_lock_init(&dc->spin_mutex);
1437
1438         nozomi_setup_private_data(dc);
1439
1440         /* Disable all interrupts */
1441         dc->last_ier = 0;
1442         writew(dc->last_ier, dc->reg_ier);
1443
1444         ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
1445                         NOZOMI_NAME, dc);
1446         if (unlikely(ret)) {
1447                 dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
1448                 goto err_free_sbuf;
1449         }
1450
1451         DBG1("base_addr: %p", dc->base_addr);
1452
1453         make_sysfs_files(dc);
1454
1455         dc->index_start = ndev_idx * MAX_PORT;
1456         ndevs[ndev_idx] = dc;
1457
1458         pci_set_drvdata(pdev, dc);
1459
1460         /* Enable RESET interrupt */
1461         dc->last_ier = RESET;
1462         iowrite16(dc->last_ier, dc->reg_ier);
1463
1464         dc->state = NOZOMI_STATE_ENABLED;
1465
1466         for (i = 0; i < MAX_PORT; i++) {
1467                 mutex_init(&dc->port[i].tty_sem);
1468                 tty_port_init(&dc->port[i].port);
1469                 tty_register_device(ntty_driver, dc->index_start + i,
1470                                                         &pdev->dev);
1471         }
1472         return 0;
1473
1474 err_free_sbuf:
1475         kfree(dc->send_buf);
1476         iounmap(dc->base_addr);
1477 err_rel_regs:
1478         pci_release_regions(pdev);
1479 err_disable_device:
1480         pci_disable_device(pdev);
1481 err_free:
1482         kfree(dc);
1483 err:
1484         return ret;
1485 }
1486
1487 static void __devexit tty_exit(struct nozomi *dc)
1488 {
1489         unsigned int i;
1490
1491         DBG1(" ");
1492
1493         flush_scheduled_work();
1494
1495         for (i = 0; i < MAX_PORT; ++i) {
1496                 struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
1497                 if (tty && list_empty(&tty->hangup_work.entry))
1498                         tty_hangup(tty);
1499                 tty_kref_put(tty);
1500         }
1501         /* Racy below - surely should wait for scheduled work to be done or
1502            complete off a hangup method ? */
1503         while (dc->open_ttys)
1504                 msleep(1);
1505         for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
1506                 tty_unregister_device(ntty_driver, i);
1507 }
1508
1509 /* Deallocate memory for one device */
1510 static void __devexit nozomi_card_exit(struct pci_dev *pdev)
1511 {
1512         int i;
1513         struct ctrl_ul ctrl;
1514         struct nozomi *dc = pci_get_drvdata(pdev);
1515
1516         /* Disable all interrupts */
1517         dc->last_ier = 0;
1518         writew(dc->last_ier, dc->reg_ier);
1519
1520         tty_exit(dc);
1521
1522         /* Send 0x0001, command card to resend the reset token.  */
1523         /* This is to get the reset when the module is reloaded. */
1524         ctrl.port = 0x00;
1525         ctrl.reserved = 0;
1526         ctrl.RTS = 0;
1527         ctrl.DTR = 1;
1528         DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
1529
1530         /* Setup dc->reg addresses to we can use defines here */
1531         write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
1532         writew(CTRL_UL, dc->reg_fcr);   /* push the token to the card. */
1533
1534         remove_sysfs_files(dc);
1535
1536         free_irq(pdev->irq, dc);
1537
1538         for (i = 0; i < MAX_PORT; i++)
1539                 kfifo_free(&dc->port[i].fifo_ul);
1540
1541         kfree(dc->send_buf);
1542
1543         iounmap(dc->base_addr);
1544
1545         pci_release_regions(pdev);
1546
1547         pci_disable_device(pdev);
1548
1549         ndevs[dc->index_start / MAX_PORT] = NULL;
1550
1551         kfree(dc);
1552 }
1553
1554 static void set_rts(const struct tty_struct *tty, int rts)
1555 {
1556         struct port *port = get_port_by_tty(tty);
1557
1558         port->ctrl_ul.RTS = rts;
1559         port->update_flow_control = 1;
1560         enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1561 }
1562
1563 static void set_dtr(const struct tty_struct *tty, int dtr)
1564 {
1565         struct port *port = get_port_by_tty(tty);
1566
1567         DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
1568
1569         port->ctrl_ul.DTR = dtr;
1570         port->update_flow_control = 1;
1571         enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1572 }
1573
1574 /*
1575  * ----------------------------------------------------------------------------
1576  * TTY code
1577  * ----------------------------------------------------------------------------
1578  */
1579
1580 /* Called when the userspace process opens the tty, /dev/noz*.  */
1581 static int ntty_open(struct tty_struct *tty, struct file *file)
1582 {
1583         struct port *port = get_port_by_tty(tty);
1584         struct nozomi *dc = get_dc_by_tty(tty);
1585         unsigned long flags;
1586
1587         if (!port || !dc || dc->state != NOZOMI_STATE_READY)
1588                 return -ENODEV;
1589
1590         if (mutex_lock_interruptible(&port->tty_sem))
1591                 return -ERESTARTSYS;
1592
1593         port->port.count++;
1594         dc->open_ttys++;
1595
1596         /* Enable interrupt downlink for channel */
1597         if (port->port.count == 1) {
1598                 tty->driver_data = port;
1599                 tty_port_tty_set(&port->port, tty);
1600                 DBG1("open: %d", port->token_dl);
1601                 spin_lock_irqsave(&dc->spin_mutex, flags);
1602                 dc->last_ier = dc->last_ier | port->token_dl;
1603                 writew(dc->last_ier, dc->reg_ier);
1604                 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1605         }
1606         mutex_unlock(&port->tty_sem);
1607         return 0;
1608 }
1609
1610 /* Called when the userspace process close the tty, /dev/noz*. Also
1611    called immediately if ntty_open fails in which case tty->driver_data
1612    will be NULL an we exit by the first return */
1613
1614 static void ntty_close(struct tty_struct *tty, struct file *file)
1615 {
1616         struct nozomi *dc = get_dc_by_tty(tty);
1617         struct port *nport = tty->driver_data;
1618         struct tty_port *port = &nport->port;
1619         unsigned long flags;
1620
1621         if (!dc || !nport)
1622                 return;
1623
1624         /* Users cannot interrupt a close */
1625         mutex_lock(&nport->tty_sem);
1626
1627         WARN_ON(!port->count);
1628
1629         dc->open_ttys--;
1630         port->count--;
1631         tty_port_tty_set(port, NULL);
1632
1633         if (port->count == 0) {
1634                 DBG1("close: %d", nport->token_dl);
1635                 spin_lock_irqsave(&dc->spin_mutex, flags);
1636                 dc->last_ier &= ~(nport->token_dl);
1637                 writew(dc->last_ier, dc->reg_ier);
1638                 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1639         }
1640         mutex_unlock(&nport->tty_sem);
1641 }
1642
1643 /*
1644  * called when the userspace process writes to the tty (/dev/noz*).
1645  * Data is inserted into a fifo, which is then read and transfered to the modem.
1646  */
1647 static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
1648                       int count)
1649 {
1650         int rval = -EINVAL;
1651         struct nozomi *dc = get_dc_by_tty(tty);
1652         struct port *port = tty->driver_data;
1653         unsigned long flags;
1654
1655         /* DBG1( "WRITEx: %d, index = %d", count, index); */
1656
1657         if (!dc || !port)
1658                 return -ENODEV;
1659
1660         if (unlikely(!mutex_trylock(&port->tty_sem))) {
1661                 /*
1662                  * must test lock as tty layer wraps calls
1663                  * to this function with BKL
1664                  */
1665                 dev_err(&dc->pdev->dev, "Would have deadlocked - "
1666                         "return EAGAIN\n");
1667                 return -EAGAIN;
1668         }
1669
1670         if (unlikely(!port->port.count)) {
1671                 DBG1(" ");
1672                 goto exit;
1673         }
1674
1675         rval = kfifo_put(&port->fifo_ul, (unsigned char *)buffer, count);
1676
1677         /* notify card */
1678         if (unlikely(dc == NULL)) {
1679                 DBG1("No device context?");
1680                 goto exit;
1681         }
1682
1683         spin_lock_irqsave(&dc->spin_mutex, flags);
1684         /* CTS is only valid on the modem channel */
1685         if (port == &(dc->port[PORT_MDM])) {
1686                 if (port->ctrl_dl.CTS) {
1687                         DBG4("Enable interrupt");
1688                         enable_transmit_ul(tty->index % MAX_PORT, dc);
1689                 } else {
1690                         dev_err(&dc->pdev->dev,
1691                                 "CTS not active on modem port?\n");
1692                 }
1693         } else {
1694                 enable_transmit_ul(tty->index % MAX_PORT, dc);
1695         }
1696         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1697
1698 exit:
1699         mutex_unlock(&port->tty_sem);
1700         return rval;
1701 }
1702
1703 /*
1704  * Calculate how much is left in device
1705  * This method is called by the upper tty layer.
1706  *   #according to sources N_TTY.c it expects a value >= 0 and
1707  *    does not check for negative values.
1708  */
1709 static int ntty_write_room(struct tty_struct *tty)
1710 {
1711         struct port *port = tty->driver_data;
1712         int room = 0;
1713         const struct nozomi *dc = get_dc_by_tty(tty);
1714
1715         if (!dc || !port)
1716                 return 0;
1717         if (!mutex_trylock(&port->tty_sem))
1718                 return 0;
1719
1720         if (!port->port.count)
1721                 goto exit;
1722
1723         room = port->fifo_ul.size - kfifo_len(&port->fifo_ul);
1724
1725 exit:
1726         mutex_unlock(&port->tty_sem);
1727         return room;
1728 }
1729
1730 /* Gets io control parameters */
1731 static int ntty_tiocmget(struct tty_struct *tty, struct file *file)
1732 {
1733         const struct port *port = tty->driver_data;
1734         const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
1735         const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
1736
1737         /* Note: these could change under us but it is not clear this
1738            matters if so */
1739         return  (ctrl_ul->RTS ? TIOCM_RTS : 0) |
1740                 (ctrl_ul->DTR ? TIOCM_DTR : 0) |
1741                 (ctrl_dl->DCD ? TIOCM_CAR : 0) |
1742                 (ctrl_dl->RI  ? TIOCM_RNG : 0) |
1743                 (ctrl_dl->DSR ? TIOCM_DSR : 0) |
1744                 (ctrl_dl->CTS ? TIOCM_CTS : 0);
1745 }
1746
1747 /* Sets io controls parameters */
1748 static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
1749         unsigned int set, unsigned int clear)
1750 {
1751         struct nozomi *dc = get_dc_by_tty(tty);
1752         unsigned long flags;
1753
1754         spin_lock_irqsave(&dc->spin_mutex, flags);
1755         if (set & TIOCM_RTS)
1756                 set_rts(tty, 1);
1757         else if (clear & TIOCM_RTS)
1758                 set_rts(tty, 0);
1759
1760         if (set & TIOCM_DTR)
1761                 set_dtr(tty, 1);
1762         else if (clear & TIOCM_DTR)
1763                 set_dtr(tty, 0);
1764         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1765
1766         return 0;
1767 }
1768
1769 static int ntty_cflags_changed(struct port *port, unsigned long flags,
1770                 struct async_icount *cprev)
1771 {
1772         const struct async_icount cnow = port->tty_icount;
1773         int ret;
1774
1775         ret =   ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1776                 ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1777                 ((flags & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1778                 ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
1779
1780         *cprev = cnow;
1781
1782         return ret;
1783 }
1784
1785 static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp)
1786 {
1787         const struct async_icount cnow = port->tty_icount;
1788         struct serial_icounter_struct icount;
1789
1790         icount.cts = cnow.cts;
1791         icount.dsr = cnow.dsr;
1792         icount.rng = cnow.rng;
1793         icount.dcd = cnow.dcd;
1794         icount.rx = cnow.rx;
1795         icount.tx = cnow.tx;
1796         icount.frame = cnow.frame;
1797         icount.overrun = cnow.overrun;
1798         icount.parity = cnow.parity;
1799         icount.brk = cnow.brk;
1800         icount.buf_overrun = cnow.buf_overrun;
1801
1802         return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0;
1803 }
1804
1805 static int ntty_ioctl(struct tty_struct *tty, struct file *file,
1806                       unsigned int cmd, unsigned long arg)
1807 {
1808         struct port *port = tty->driver_data;
1809         void __user *argp = (void __user *)arg;
1810         int rval = -ENOIOCTLCMD;
1811
1812         DBG1("******** IOCTL, cmd: %d", cmd);
1813
1814         switch (cmd) {
1815         case TIOCMIWAIT: {
1816                 struct async_icount cprev = port->tty_icount;
1817
1818                 rval = wait_event_interruptible(port->tty_wait,
1819                                 ntty_cflags_changed(port, arg, &cprev));
1820                 break;
1821         } case TIOCGICOUNT:
1822                 rval = ntty_ioctl_tiocgicount(port, argp);
1823                 break;
1824         default:
1825                 DBG1("ERR: 0x%08X, %d", cmd, cmd);
1826                 break;
1827         };
1828
1829         return rval;
1830 }
1831
1832 /*
1833  * Called by the upper tty layer when tty buffers are ready
1834  * to receive data again after a call to throttle.
1835  */
1836 static void ntty_unthrottle(struct tty_struct *tty)
1837 {
1838         struct nozomi *dc = get_dc_by_tty(tty);
1839         unsigned long flags;
1840
1841         DBG1("UNTHROTTLE");
1842         spin_lock_irqsave(&dc->spin_mutex, flags);
1843         enable_transmit_dl(tty->index % MAX_PORT, dc);
1844         set_rts(tty, 1);
1845
1846         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1847 }
1848
1849 /*
1850  * Called by the upper tty layer when the tty buffers are almost full.
1851  * The driver should stop send more data.
1852  */
1853 static void ntty_throttle(struct tty_struct *tty)
1854 {
1855         struct nozomi *dc = get_dc_by_tty(tty);
1856         unsigned long flags;
1857
1858         DBG1("THROTTLE");
1859         spin_lock_irqsave(&dc->spin_mutex, flags);
1860         set_rts(tty, 0);
1861         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1862 }
1863
1864 /* Returns number of chars in buffer, called by tty layer */
1865 static s32 ntty_chars_in_buffer(struct tty_struct *tty)
1866 {
1867         struct port *port = tty->driver_data;
1868         struct nozomi *dc = get_dc_by_tty(tty);
1869         s32 rval = 0;
1870
1871         if (unlikely(!dc || !port)) {
1872                 goto exit_in_buffer;
1873         }
1874
1875         if (unlikely(!port->port.count)) {
1876                 dev_err(&dc->pdev->dev, "No tty open?\n");
1877                 goto exit_in_buffer;
1878         }
1879
1880         rval = kfifo_len(&port->fifo_ul);
1881
1882 exit_in_buffer:
1883         return rval;
1884 }
1885
1886 static const struct tty_operations tty_ops = {
1887         .ioctl = ntty_ioctl,
1888         .open = ntty_open,
1889         .close = ntty_close,
1890         .write = ntty_write,
1891         .write_room = ntty_write_room,
1892         .unthrottle = ntty_unthrottle,
1893         .throttle = ntty_throttle,
1894         .chars_in_buffer = ntty_chars_in_buffer,
1895         .tiocmget = ntty_tiocmget,
1896         .tiocmset = ntty_tiocmset,
1897 };
1898
1899 /* Module initialization */
1900 static struct pci_driver nozomi_driver = {
1901         .name = NOZOMI_NAME,
1902         .id_table = nozomi_pci_tbl,
1903         .probe = nozomi_card_init,
1904         .remove = __devexit_p(nozomi_card_exit),
1905 };
1906
1907 static __init int nozomi_init(void)
1908 {
1909         int ret;
1910
1911         printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
1912
1913         ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
1914         if (!ntty_driver)
1915                 return -ENOMEM;
1916
1917         ntty_driver->owner = THIS_MODULE;
1918         ntty_driver->driver_name = NOZOMI_NAME_TTY;
1919         ntty_driver->name = "noz";
1920         ntty_driver->major = 0;
1921         ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1922         ntty_driver->subtype = SERIAL_TYPE_NORMAL;
1923         ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1924         ntty_driver->init_termios = tty_std_termios;
1925         ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
1926                                                 HUPCL | CLOCAL;
1927         ntty_driver->init_termios.c_ispeed = 115200;
1928         ntty_driver->init_termios.c_ospeed = 115200;
1929         tty_set_operations(ntty_driver, &tty_ops);
1930
1931         ret = tty_register_driver(ntty_driver);
1932         if (ret) {
1933                 printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
1934                 goto free_tty;
1935         }
1936
1937         ret = pci_register_driver(&nozomi_driver);
1938         if (ret) {
1939                 printk(KERN_ERR "Nozomi: can't register pci driver\n");
1940                 goto unr_tty;
1941         }
1942
1943         return 0;
1944 unr_tty:
1945         tty_unregister_driver(ntty_driver);
1946 free_tty:
1947         put_tty_driver(ntty_driver);
1948         return ret;
1949 }
1950
1951 static __exit void nozomi_exit(void)
1952 {
1953         printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
1954         pci_unregister_driver(&nozomi_driver);
1955         tty_unregister_driver(ntty_driver);
1956         put_tty_driver(ntty_driver);
1957 }
1958
1959 module_init(nozomi_init);
1960 module_exit(nozomi_exit);
1961
1962 module_param(debug, int, S_IRUGO | S_IWUSR);
1963
1964 MODULE_LICENSE("Dual BSD/GPL");
1965 MODULE_DESCRIPTION(DRIVER_DESC);