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