Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
[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 /* Initialization states a card can be in */
194 enum card_state {
195         NOZOMI_STATE_UKNOWN     = 0,
196         NOZOMI_STATE_ENABLED    = 1,    /* pci device enabled */
197         NOZOMI_STATE_ALLOCATED  = 2,    /* config setup done */
198         NOZOMI_STATE_READY      = 3,    /* flowcontrols received */
199 };
200
201 /* Two different toggle channels exist */
202 enum channel_type {
203         CH_A = 0,
204         CH_B = 1,
205 };
206
207 /* Port definition for the card regarding flow control */
208 enum ctrl_port_type {
209         CTRL_CMD        = 0,
210         CTRL_MDM        = 1,
211         CTRL_DIAG       = 2,
212         CTRL_APP1       = 3,
213         CTRL_APP2       = 4,
214         CTRL_ERROR      = -1,
215 };
216
217 /* Ports that the nozomi has */
218 enum port_type {
219         PORT_MDM        = 0,
220         PORT_DIAG       = 1,
221         PORT_APP1       = 2,
222         PORT_APP2       = 3,
223         PORT_CTRL       = 4,
224         PORT_ERROR      = -1,
225 };
226
227 #ifdef __BIG_ENDIAN
228 /* Big endian */
229
230 struct toggles {
231         unsigned int enabled:5; /*
232                                  * Toggle fields are valid if enabled is 0,
233                                  * else A-channels must always be used.
234                                  */
235         unsigned int diag_dl:1;
236         unsigned int mdm_dl:1;
237         unsigned int mdm_ul:1;
238 } __attribute__ ((packed));
239
240 /* Configuration table to read at startup of card */
241 /* Is for now only needed during initialization phase */
242 struct config_table {
243         u32 signature;
244         u16 product_information;
245         u16 version;
246         u8 pad3[3];
247         struct toggles toggle;
248         u8 pad1[4];
249         u16 dl_mdm_len1;        /*
250                                  * If this is 64, it can hold
251                                  * 60 bytes + 4 that is length field
252                                  */
253         u16 dl_start;
254
255         u16 dl_diag_len1;
256         u16 dl_mdm_len2;        /*
257                                  * If this is 64, it can hold
258                                  * 60 bytes + 4 that is length field
259                                  */
260         u16 dl_app1_len;
261
262         u16 dl_diag_len2;
263         u16 dl_ctrl_len;
264         u16 dl_app2_len;
265         u8 pad2[16];
266         u16 ul_mdm_len1;
267         u16 ul_start;
268         u16 ul_diag_len;
269         u16 ul_mdm_len2;
270         u16 ul_app1_len;
271         u16 ul_app2_len;
272         u16 ul_ctrl_len;
273 } __attribute__ ((packed));
274
275 /* This stores all control downlink flags */
276 struct ctrl_dl {
277         u8 port;
278         unsigned int reserved:4;
279         unsigned int CTS:1;
280         unsigned int RI:1;
281         unsigned int DCD:1;
282         unsigned int DSR:1;
283 } __attribute__ ((packed));
284
285 /* This stores all control uplink flags */
286 struct ctrl_ul {
287         u8 port;
288         unsigned int reserved:6;
289         unsigned int RTS:1;
290         unsigned int DTR:1;
291 } __attribute__ ((packed));
292
293 #else
294 /* Little endian */
295
296 /* This represents the toggle information */
297 struct toggles {
298         unsigned int mdm_ul:1;
299         unsigned int mdm_dl:1;
300         unsigned int diag_dl:1;
301         unsigned int enabled:5; /*
302                                  * Toggle fields are valid if enabled is 0,
303                                  * else A-channels must always be used.
304                                  */
305 } __attribute__ ((packed));
306
307 /* Configuration table to read at startup of card */
308 struct config_table {
309         u32 signature;
310         u16 version;
311         u16 product_information;
312         struct toggles toggle;
313         u8 pad1[7];
314         u16 dl_start;
315         u16 dl_mdm_len1;        /*
316                                  * If this is 64, it can hold
317                                  * 60 bytes + 4 that is length field
318                                  */
319         u16 dl_mdm_len2;
320         u16 dl_diag_len1;
321         u16 dl_diag_len2;
322         u16 dl_app1_len;
323         u16 dl_app2_len;
324         u16 dl_ctrl_len;
325         u8 pad2[16];
326         u16 ul_start;
327         u16 ul_mdm_len2;
328         u16 ul_mdm_len1;
329         u16 ul_diag_len;
330         u16 ul_app1_len;
331         u16 ul_app2_len;
332         u16 ul_ctrl_len;
333 } __attribute__ ((packed));
334
335 /* This stores all control downlink flags */
336 struct ctrl_dl {
337         unsigned int DSR:1;
338         unsigned int DCD:1;
339         unsigned int RI:1;
340         unsigned int CTS:1;
341         unsigned int reserverd:4;
342         u8 port;
343 } __attribute__ ((packed));
344
345 /* This stores all control uplink flags */
346 struct ctrl_ul {
347         unsigned int DTR:1;
348         unsigned int RTS:1;
349         unsigned int reserved:6;
350         u8 port;
351 } __attribute__ ((packed));
352 #endif
353
354 /* This holds all information that is needed regarding a port */
355 struct port {
356         u8 update_flow_control;
357         struct ctrl_ul ctrl_ul;
358         struct ctrl_dl ctrl_dl;
359         struct kfifo *fifo_ul;
360         void __iomem *dl_addr[2];
361         u32 dl_size[2];
362         u8 toggle_dl;
363         void __iomem *ul_addr[2];
364         u32 ul_size[2];
365         u8 toggle_ul;
366         u16 token_dl;
367
368         struct tty_struct *tty;
369         int tty_open_count;
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 *ptr = (__force u32 *) 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((void __iomem *)ptr));
452                 goto out;
453                 break;
454         case 4: /* 4 bytes */
455                 *(buf) = __le32_to_cpu(readl((void __iomem *)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((void __iomem *)ptr));
465                         i += 2;
466                 } else {
467                         /* Read 4 bytes */
468                         *(buf) = __le32_to_cpu(readl((void __iomem *)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 *ptr = (__force u32 *) 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), (void __iomem *)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), (void __iomem *)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), (void __iomem *)ptr);
515                         i += 2;
516                 } else {
517                         /* 4 bytes */
518                         writel(__cpu_to_le32(*buf), (void __iomem *)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                         dc->port[i].fifo_ul =
689                             kfifo_alloc(FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL);
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, const struct nozomi *dc)
792 {
793         u32 size = 0;
794         const 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 = port->tty;
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                 return 0;
807         }
808
809         /* DUMP(buf, size); */
810
811         /* Write length + data */
812         write_mem32(addr, (u32 *) &size, 4);
813         write_mem32(addr + 4, (u32 *) dc->send_buf, size);
814
815         if (tty)
816                 tty_wakeup(tty);
817
818         return 1;
819 }
820
821 /* If all data has been read, return 1, else 0 */
822 static int receive_data(enum port_type index, struct nozomi *dc)
823 {
824         u8 buf[RECEIVE_BUF_MAX] = { 0 };
825         int size;
826         u32 offset = 4;
827         struct port *port = &dc->port[index];
828         void __iomem *addr = port->dl_addr[port->toggle_dl];
829         struct tty_struct *tty = port->tty;
830         int i;
831
832         if (unlikely(!tty)) {
833                 DBG1("tty not open for port: %d?", index);
834                 return 1;
835         }
836
837         read_mem32((u32 *) &size, addr, 4);
838         /*  DBG1( "%d bytes port: %d", size, index); */
839
840         if (test_bit(TTY_THROTTLED, &tty->flags)) {
841                 DBG1("No room in tty, don't read data, don't ack interrupt, "
842                         "disable interrupt");
843
844                 /* disable interrupt in downlink... */
845                 disable_transmit_dl(index, dc);
846                 return 0;
847         }
848
849         if (unlikely(size == 0)) {
850                 dev_err(&dc->pdev->dev, "size == 0?\n");
851                 return 1;
852         }
853
854         tty_buffer_request_room(tty, size);
855
856         while (size > 0) {
857                 read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
858
859                 if (size == 1) {
860                         tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
861                         size = 0;
862                 } else if (size < RECEIVE_BUF_MAX) {
863                         size -= tty_insert_flip_string(tty, (char *) buf, size);
864                 } else {
865                         i = tty_insert_flip_string(tty, \
866                                                 (char *) buf, RECEIVE_BUF_MAX);
867                         size -= i;
868                         offset += i;
869                 }
870         }
871
872         set_bit(index, &dc->flip);
873
874         return 1;
875 }
876
877 /* Debug for interrupts */
878 #ifdef DEBUG
879 static char *interrupt2str(u16 interrupt)
880 {
881         static char buf[TMP_BUF_MAX];
882         char *p = buf;
883
884         interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
885         interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
886                                         "MDM_DL2 ") : NULL;
887
888         interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
889                                         "MDM_UL1 ") : NULL;
890         interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
891                                         "MDM_UL2 ") : NULL;
892
893         interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
894                                         "DIAG_DL1 ") : NULL;
895         interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
896                                         "DIAG_DL2 ") : NULL;
897
898         interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
899                                         "DIAG_UL ") : NULL;
900
901         interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
902                                         "APP1_DL ") : NULL;
903         interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
904                                         "APP2_DL ") : NULL;
905
906         interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
907                                         "APP1_UL ") : NULL;
908         interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
909                                         "APP2_UL ") : NULL;
910
911         interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
912                                         "CTRL_DL ") : NULL;
913         interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
914                                         "CTRL_UL ") : NULL;
915
916         interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
917                                         "RESET ") : NULL;
918
919         return buf;
920 }
921 #endif
922
923 /*
924  * Receive flow control
925  * Return 1 - If ok, else 0
926  */
927 static int receive_flow_control(struct nozomi *dc)
928 {
929         enum port_type port = PORT_MDM;
930         struct ctrl_dl ctrl_dl;
931         struct ctrl_dl old_ctrl;
932         u16 enable_ier = 0;
933
934         read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
935
936         switch (ctrl_dl.port) {
937         case CTRL_CMD:
938                 DBG1("The Base Band sends this value as a response to a "
939                         "request for IMSI detach sent over the control "
940                         "channel uplink (see section 7.6.1).");
941                 break;
942         case CTRL_MDM:
943                 port = PORT_MDM;
944                 enable_ier = MDM_DL;
945                 break;
946         case CTRL_DIAG:
947                 port = PORT_DIAG;
948                 enable_ier = DIAG_DL;
949                 break;
950         case CTRL_APP1:
951                 port = PORT_APP1;
952                 enable_ier = APP1_DL;
953                 break;
954         case CTRL_APP2:
955                 port = PORT_APP2;
956                 enable_ier = APP2_DL;
957                 if (dc->state == NOZOMI_STATE_ALLOCATED) {
958                         /*
959                          * After card initialization the flow control
960                          * received for APP2 is always the last
961                          */
962                         dc->state = NOZOMI_STATE_READY;
963                         dev_info(&dc->pdev->dev, "Device READY!\n");
964                 }
965                 break;
966         default:
967                 dev_err(&dc->pdev->dev,
968                         "ERROR: flow control received for non-existing port\n");
969                 return 0;
970         };
971
972         DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
973            *((u16 *)&ctrl_dl));
974
975         old_ctrl = dc->port[port].ctrl_dl;
976         dc->port[port].ctrl_dl = ctrl_dl;
977
978         if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
979                 DBG1("Disable interrupt (0x%04X) on port: %d",
980                         enable_ier, port);
981                 disable_transmit_ul(port, dc);
982
983         } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
984
985                 if (__kfifo_len(dc->port[port].fifo_ul)) {
986                         DBG1("Enable interrupt (0x%04X) on port: %d",
987                                 enable_ier, port);
988                         DBG1("Data in buffer [%d], enable transmit! ",
989                                 __kfifo_len(dc->port[port].fifo_ul));
990                         enable_transmit_ul(port, dc);
991                 } else {
992                         DBG1("No data in buffer...");
993                 }
994         }
995
996         if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
997                 DBG1(" No change in mctrl");
998                 return 1;
999         }
1000         /* Update statistics */
1001         if (old_ctrl.CTS != ctrl_dl.CTS)
1002                 dc->port[port].tty_icount.cts++;
1003         if (old_ctrl.DSR != ctrl_dl.DSR)
1004                 dc->port[port].tty_icount.dsr++;
1005         if (old_ctrl.RI != ctrl_dl.RI)
1006                 dc->port[port].tty_icount.rng++;
1007         if (old_ctrl.DCD != ctrl_dl.DCD)
1008                 dc->port[port].tty_icount.dcd++;
1009
1010         wake_up_interruptible(&dc->port[port].tty_wait);
1011
1012         DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
1013            port,
1014            dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
1015            dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
1016
1017         return 1;
1018 }
1019
1020 static enum ctrl_port_type port2ctrl(enum port_type port,
1021                                         const struct nozomi *dc)
1022 {
1023         switch (port) {
1024         case PORT_MDM:
1025                 return CTRL_MDM;
1026         case PORT_DIAG:
1027                 return CTRL_DIAG;
1028         case PORT_APP1:
1029                 return CTRL_APP1;
1030         case PORT_APP2:
1031                 return CTRL_APP2;
1032         default:
1033                 dev_err(&dc->pdev->dev,
1034                         "ERROR: send flow control " \
1035                         "received for non-existing port\n");
1036         };
1037         return CTRL_ERROR;
1038 }
1039
1040 /*
1041  * Send flow control, can only update one channel at a time
1042  * Return 0 - If we have updated all flow control
1043  * Return 1 - If we need to update more flow control, ack current enable more
1044  */
1045 static int send_flow_control(struct nozomi *dc)
1046 {
1047         u32 i, more_flow_control_to_be_updated = 0;
1048         u16 *ctrl;
1049
1050         for (i = PORT_MDM; i < MAX_PORT; i++) {
1051                 if (dc->port[i].update_flow_control) {
1052                         if (more_flow_control_to_be_updated) {
1053                                 /* We have more flow control to be updated */
1054                                 return 1;
1055                         }
1056                         dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
1057                         ctrl = (u16 *)&dc->port[i].ctrl_ul;
1058                         write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
1059                                 (u32 *) ctrl, 2);
1060                         dc->port[i].update_flow_control = 0;
1061                         more_flow_control_to_be_updated = 1;
1062                 }
1063         }
1064         return 0;
1065 }
1066
1067 /*
1068  * Handle downlink data, ports that are handled are modem and diagnostics
1069  * Return 1 - ok
1070  * Return 0 - toggle fields are out of sync
1071  */
1072 static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
1073                         u16 read_iir, u16 mask1, u16 mask2)
1074 {
1075         if (*toggle == 0 && read_iir & mask1) {
1076                 if (receive_data(port, dc)) {
1077                         writew(mask1, dc->reg_fcr);
1078                         *toggle = !(*toggle);
1079                 }
1080
1081                 if (read_iir & mask2) {
1082                         if (receive_data(port, dc)) {
1083                                 writew(mask2, dc->reg_fcr);
1084                                 *toggle = !(*toggle);
1085                         }
1086                 }
1087         } else if (*toggle == 1 && read_iir & mask2) {
1088                 if (receive_data(port, dc)) {
1089                         writew(mask2, dc->reg_fcr);
1090                         *toggle = !(*toggle);
1091                 }
1092
1093                 if (read_iir & mask1) {
1094                         if (receive_data(port, dc)) {
1095                                 writew(mask1, dc->reg_fcr);
1096                                 *toggle = !(*toggle);
1097                         }
1098                 }
1099         } else {
1100                 dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
1101                         *toggle);
1102                 return 0;
1103         }
1104         return 1;
1105 }
1106
1107 /*
1108  * Handle uplink data, this is currently for the modem port
1109  * Return 1 - ok
1110  * Return 0 - toggle field are out of sync
1111  */
1112 static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
1113 {
1114         u8 *toggle = &(dc->port[port].toggle_ul);
1115
1116         if (*toggle == 0 && read_iir & MDM_UL1) {
1117                 dc->last_ier &= ~MDM_UL;
1118                 writew(dc->last_ier, dc->reg_ier);
1119                 if (send_data(port, dc)) {
1120                         writew(MDM_UL1, dc->reg_fcr);
1121                         dc->last_ier = dc->last_ier | MDM_UL;
1122                         writew(dc->last_ier, dc->reg_ier);
1123                         *toggle = !*toggle;
1124                 }
1125
1126                 if (read_iir & MDM_UL2) {
1127                         dc->last_ier &= ~MDM_UL;
1128                         writew(dc->last_ier, dc->reg_ier);
1129                         if (send_data(port, dc)) {
1130                                 writew(MDM_UL2, dc->reg_fcr);
1131                                 dc->last_ier = dc->last_ier | MDM_UL;
1132                                 writew(dc->last_ier, dc->reg_ier);
1133                                 *toggle = !*toggle;
1134                         }
1135                 }
1136
1137         } else if (*toggle == 1 && read_iir & MDM_UL2) {
1138                 dc->last_ier &= ~MDM_UL;
1139                 writew(dc->last_ier, dc->reg_ier);
1140                 if (send_data(port, dc)) {
1141                         writew(MDM_UL2, dc->reg_fcr);
1142                         dc->last_ier = dc->last_ier | MDM_UL;
1143                         writew(dc->last_ier, dc->reg_ier);
1144                         *toggle = !*toggle;
1145                 }
1146
1147                 if (read_iir & MDM_UL1) {
1148                         dc->last_ier &= ~MDM_UL;
1149                         writew(dc->last_ier, dc->reg_ier);
1150                         if (send_data(port, dc)) {
1151                                 writew(MDM_UL1, dc->reg_fcr);
1152                                 dc->last_ier = dc->last_ier | MDM_UL;
1153                                 writew(dc->last_ier, dc->reg_ier);
1154                                 *toggle = !*toggle;
1155                         }
1156                 }
1157         } else {
1158                 writew(read_iir & MDM_UL, dc->reg_fcr);
1159                 dev_err(&dc->pdev->dev, "port out of sync!\n");
1160                 return 0;
1161         }
1162         return 1;
1163 }
1164
1165 static irqreturn_t interrupt_handler(int irq, void *dev_id)
1166 {
1167         struct nozomi *dc = dev_id;
1168         unsigned int a;
1169         u16 read_iir;
1170
1171         if (!dc)
1172                 return IRQ_NONE;
1173
1174         spin_lock(&dc->spin_mutex);
1175         read_iir = readw(dc->reg_iir);
1176
1177         /* Card removed */
1178         if (read_iir == (u16)-1)
1179                 goto none;
1180         /*
1181          * Just handle interrupt enabled in IER
1182          * (by masking with dc->last_ier)
1183          */
1184         read_iir &= dc->last_ier;
1185
1186         if (read_iir == 0)
1187                 goto none;
1188
1189
1190         DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
1191                 dc->last_ier);
1192
1193         if (read_iir & RESET) {
1194                 if (unlikely(!nozomi_read_config_table(dc))) {
1195                         dc->last_ier = 0x0;
1196                         writew(dc->last_ier, dc->reg_ier);
1197                         dev_err(&dc->pdev->dev, "Could not read status from "
1198                                 "card, we should disable interface\n");
1199                 } else {
1200                         writew(RESET, dc->reg_fcr);
1201                 }
1202                 /* No more useful info if this was the reset interrupt. */
1203                 goto exit_handler;
1204         }
1205         if (read_iir & CTRL_UL) {
1206                 DBG1("CTRL_UL");
1207                 dc->last_ier &= ~CTRL_UL;
1208                 writew(dc->last_ier, dc->reg_ier);
1209                 if (send_flow_control(dc)) {
1210                         writew(CTRL_UL, dc->reg_fcr);
1211                         dc->last_ier = dc->last_ier | CTRL_UL;
1212                         writew(dc->last_ier, dc->reg_ier);
1213                 }
1214         }
1215         if (read_iir & CTRL_DL) {
1216                 receive_flow_control(dc);
1217                 writew(CTRL_DL, dc->reg_fcr);
1218         }
1219         if (read_iir & MDM_DL) {
1220                 if (!handle_data_dl(dc, PORT_MDM,
1221                                 &(dc->port[PORT_MDM].toggle_dl), read_iir,
1222                                 MDM_DL1, MDM_DL2)) {
1223                         dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
1224                         goto exit_handler;
1225                 }
1226         }
1227         if (read_iir & MDM_UL) {
1228                 if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
1229                         dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
1230                         goto exit_handler;
1231                 }
1232         }
1233         if (read_iir & DIAG_DL) {
1234                 if (!handle_data_dl(dc, PORT_DIAG,
1235                                 &(dc->port[PORT_DIAG].toggle_dl), read_iir,
1236                                 DIAG_DL1, DIAG_DL2)) {
1237                         dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
1238                         goto exit_handler;
1239                 }
1240         }
1241         if (read_iir & DIAG_UL) {
1242                 dc->last_ier &= ~DIAG_UL;
1243                 writew(dc->last_ier, dc->reg_ier);
1244                 if (send_data(PORT_DIAG, dc)) {
1245                         writew(DIAG_UL, dc->reg_fcr);
1246                         dc->last_ier = dc->last_ier | DIAG_UL;
1247                         writew(dc->last_ier, dc->reg_ier);
1248                 }
1249         }
1250         if (read_iir & APP1_DL) {
1251                 if (receive_data(PORT_APP1, dc))
1252                         writew(APP1_DL, dc->reg_fcr);
1253         }
1254         if (read_iir & APP1_UL) {
1255                 dc->last_ier &= ~APP1_UL;
1256                 writew(dc->last_ier, dc->reg_ier);
1257                 if (send_data(PORT_APP1, dc)) {
1258                         writew(APP1_UL, dc->reg_fcr);
1259                         dc->last_ier = dc->last_ier | APP1_UL;
1260                         writew(dc->last_ier, dc->reg_ier);
1261                 }
1262         }
1263         if (read_iir & APP2_DL) {
1264                 if (receive_data(PORT_APP2, dc))
1265                         writew(APP2_DL, dc->reg_fcr);
1266         }
1267         if (read_iir & APP2_UL) {
1268                 dc->last_ier &= ~APP2_UL;
1269                 writew(dc->last_ier, dc->reg_ier);
1270                 if (send_data(PORT_APP2, dc)) {
1271                         writew(APP2_UL, dc->reg_fcr);
1272                         dc->last_ier = dc->last_ier | APP2_UL;
1273                         writew(dc->last_ier, dc->reg_ier);
1274                 }
1275         }
1276
1277 exit_handler:
1278         spin_unlock(&dc->spin_mutex);
1279         for (a = 0; a < NOZOMI_MAX_PORTS; a++)
1280                 if (test_and_clear_bit(a, &dc->flip))
1281                         tty_flip_buffer_push(dc->port[a].tty);
1282         return IRQ_HANDLED;
1283 none:
1284         spin_unlock(&dc->spin_mutex);
1285         return IRQ_NONE;
1286 }
1287
1288 static void nozomi_get_card_type(struct nozomi *dc)
1289 {
1290         int i;
1291         u32 size = 0;
1292
1293         for (i = 0; i < 6; i++)
1294                 size += pci_resource_len(dc->pdev, i);
1295
1296         /* Assume card type F32_8 if no match */
1297         dc->card_type = size == 2048 ? F32_2 : F32_8;
1298
1299         dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
1300 }
1301
1302 static void nozomi_setup_private_data(struct nozomi *dc)
1303 {
1304         void __iomem *offset = dc->base_addr + dc->card_type / 2;
1305         unsigned int i;
1306
1307         dc->reg_fcr = (void __iomem *)(offset + R_FCR);
1308         dc->reg_iir = (void __iomem *)(offset + R_IIR);
1309         dc->reg_ier = (void __iomem *)(offset + R_IER);
1310         dc->last_ier = 0;
1311         dc->flip = 0;
1312
1313         dc->port[PORT_MDM].token_dl = MDM_DL;
1314         dc->port[PORT_DIAG].token_dl = DIAG_DL;
1315         dc->port[PORT_APP1].token_dl = APP1_DL;
1316         dc->port[PORT_APP2].token_dl = APP2_DL;
1317
1318         for (i = 0; i < MAX_PORT; i++)
1319                 init_waitqueue_head(&dc->port[i].tty_wait);
1320 }
1321
1322 static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
1323                           char *buf)
1324 {
1325         const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1326
1327         return sprintf(buf, "%d\n", dc->card_type);
1328 }
1329 static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
1330
1331 static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
1332                           char *buf)
1333 {
1334         const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1335
1336         return sprintf(buf, "%u\n", dc->open_ttys);
1337 }
1338 static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
1339
1340 static void make_sysfs_files(struct nozomi *dc)
1341 {
1342         if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
1343                 dev_err(&dc->pdev->dev,
1344                         "Could not create sysfs file for card_type\n");
1345         if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
1346                 dev_err(&dc->pdev->dev,
1347                         "Could not create sysfs file for open_ttys\n");
1348 }
1349
1350 static void remove_sysfs_files(struct nozomi *dc)
1351 {
1352         device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
1353         device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
1354 }
1355
1356 /* Allocate memory for one device */
1357 static int __devinit nozomi_card_init(struct pci_dev *pdev,
1358                                       const struct pci_device_id *ent)
1359 {
1360         resource_size_t start;
1361         int ret;
1362         struct nozomi *dc = NULL;
1363         int ndev_idx;
1364         int i;
1365
1366         dev_dbg(&pdev->dev, "Init, new card found\n");
1367
1368         for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
1369                 if (!ndevs[ndev_idx])
1370                         break;
1371
1372         if (ndev_idx >= ARRAY_SIZE(ndevs)) {
1373                 dev_err(&pdev->dev, "no free tty range for this card left\n");
1374                 ret = -EIO;
1375                 goto err;
1376         }
1377
1378         dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
1379         if (unlikely(!dc)) {
1380                 dev_err(&pdev->dev, "Could not allocate memory\n");
1381                 ret = -ENOMEM;
1382                 goto err_free;
1383         }
1384
1385         dc->pdev = pdev;
1386
1387         ret = pci_enable_device(dc->pdev);
1388         if (ret) {
1389                 dev_err(&pdev->dev, "Failed to enable PCI Device\n");
1390                 goto err_free;
1391         }
1392
1393         ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
1394         if (ret) {
1395                 dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
1396                         (int) /* nozomi_private.io_addr */ 0);
1397                 goto err_disable_device;
1398         }
1399
1400         start = pci_resource_start(dc->pdev, 0);
1401         if (start == 0) {
1402                 dev_err(&pdev->dev, "No I/O address for card detected\n");
1403                 ret = -ENODEV;
1404                 goto err_rel_regs;
1405         }
1406
1407         /* Find out what card type it is */
1408         nozomi_get_card_type(dc);
1409
1410         dc->base_addr = ioremap(start, dc->card_type);
1411         if (!dc->base_addr) {
1412                 dev_err(&pdev->dev, "Unable to map card MMIO\n");
1413                 ret = -ENODEV;
1414                 goto err_rel_regs;
1415         }
1416
1417         dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
1418         if (!dc->send_buf) {
1419                 dev_err(&pdev->dev, "Could not allocate send buffer?\n");
1420                 ret = -ENOMEM;
1421                 goto err_free_sbuf;
1422         }
1423
1424         spin_lock_init(&dc->spin_mutex);
1425
1426         nozomi_setup_private_data(dc);
1427
1428         /* Disable all interrupts */
1429         dc->last_ier = 0;
1430         writew(dc->last_ier, dc->reg_ier);
1431
1432         ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
1433                         NOZOMI_NAME, dc);
1434         if (unlikely(ret)) {
1435                 dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
1436                 goto err_free_sbuf;
1437         }
1438
1439         DBG1("base_addr: %p", dc->base_addr);
1440
1441         make_sysfs_files(dc);
1442
1443         dc->index_start = ndev_idx * MAX_PORT;
1444         ndevs[ndev_idx] = dc;
1445
1446         pci_set_drvdata(pdev, dc);
1447
1448         /* Enable RESET interrupt */
1449         dc->last_ier = RESET;
1450         iowrite16(dc->last_ier, dc->reg_ier);
1451
1452         dc->state = NOZOMI_STATE_ENABLED;
1453
1454         for (i = 0; i < MAX_PORT; i++) {
1455                 mutex_init(&dc->port[i].tty_sem);
1456                 dc->port[i].tty_open_count = 0;
1457                 dc->port[i].tty = NULL;
1458                 tty_register_device(ntty_driver, dc->index_start + i,
1459                                                         &pdev->dev);
1460         }
1461
1462         return 0;
1463
1464 err_free_sbuf:
1465         kfree(dc->send_buf);
1466         iounmap(dc->base_addr);
1467 err_rel_regs:
1468         pci_release_regions(pdev);
1469 err_disable_device:
1470         pci_disable_device(pdev);
1471 err_free:
1472         kfree(dc);
1473 err:
1474         return ret;
1475 }
1476
1477 static void __devexit tty_exit(struct nozomi *dc)
1478 {
1479         unsigned int i;
1480
1481         DBG1(" ");
1482
1483         flush_scheduled_work();
1484
1485         for (i = 0; i < MAX_PORT; ++i)
1486                 if (dc->port[i].tty && \
1487                                 list_empty(&dc->port[i].tty->hangup_work.entry))
1488                         tty_hangup(dc->port[i].tty);
1489
1490         while (dc->open_ttys)
1491                 msleep(1);
1492
1493         for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
1494                 tty_unregister_device(ntty_driver, i);
1495 }
1496
1497 /* Deallocate memory for one device */
1498 static void __devexit nozomi_card_exit(struct pci_dev *pdev)
1499 {
1500         int i;
1501         struct ctrl_ul ctrl;
1502         struct nozomi *dc = pci_get_drvdata(pdev);
1503
1504         /* Disable all interrupts */
1505         dc->last_ier = 0;
1506         writew(dc->last_ier, dc->reg_ier);
1507
1508         tty_exit(dc);
1509
1510         /* Send 0x0001, command card to resend the reset token.  */
1511         /* This is to get the reset when the module is reloaded. */
1512         ctrl.port = 0x00;
1513         ctrl.reserved = 0;
1514         ctrl.RTS = 0;
1515         ctrl.DTR = 1;
1516         DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
1517
1518         /* Setup dc->reg addresses to we can use defines here */
1519         write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
1520         writew(CTRL_UL, dc->reg_fcr);   /* push the token to the card. */
1521
1522         remove_sysfs_files(dc);
1523
1524         free_irq(pdev->irq, dc);
1525
1526         for (i = 0; i < MAX_PORT; i++)
1527                 if (dc->port[i].fifo_ul)
1528                         kfifo_free(dc->port[i].fifo_ul);
1529
1530         kfree(dc->send_buf);
1531
1532         iounmap(dc->base_addr);
1533
1534         pci_release_regions(pdev);
1535
1536         pci_disable_device(pdev);
1537
1538         ndevs[dc->index_start / MAX_PORT] = NULL;
1539
1540         kfree(dc);
1541 }
1542
1543 static void set_rts(const struct tty_struct *tty, int rts)
1544 {
1545         struct port *port = get_port_by_tty(tty);
1546
1547         port->ctrl_ul.RTS = rts;
1548         port->update_flow_control = 1;
1549         enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1550 }
1551
1552 static void set_dtr(const struct tty_struct *tty, int dtr)
1553 {
1554         struct port *port = get_port_by_tty(tty);
1555
1556         DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
1557
1558         port->ctrl_ul.DTR = dtr;
1559         port->update_flow_control = 1;
1560         enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1561 }
1562
1563 /*
1564  * ----------------------------------------------------------------------------
1565  * TTY code
1566  * ----------------------------------------------------------------------------
1567  */
1568
1569 /* Called when the userspace process opens the tty, /dev/noz*.  */
1570 static int ntty_open(struct tty_struct *tty, struct file *file)
1571 {
1572         struct port *port = get_port_by_tty(tty);
1573         struct nozomi *dc = get_dc_by_tty(tty);
1574         unsigned long flags;
1575
1576         if (!port || !dc || dc->state != NOZOMI_STATE_READY)
1577                 return -ENODEV;
1578
1579         if (mutex_lock_interruptible(&port->tty_sem))
1580                 return -ERESTARTSYS;
1581
1582         port->tty_open_count++;
1583         dc->open_ttys++;
1584
1585         /* Enable interrupt downlink for channel */
1586         if (port->tty_open_count == 1) {
1587                 tty->low_latency = 1;
1588                 tty->driver_data = port;
1589                 port->tty = tty;
1590                 DBG1("open: %d", port->token_dl);
1591                 spin_lock_irqsave(&dc->spin_mutex, flags);
1592                 dc->last_ier = dc->last_ier | port->token_dl;
1593                 writew(dc->last_ier, dc->reg_ier);
1594                 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1595         }
1596
1597         mutex_unlock(&port->tty_sem);
1598
1599         return 0;
1600 }
1601
1602 /* Called when the userspace process close the tty, /dev/noz*. */
1603 static void ntty_close(struct tty_struct *tty, struct file *file)
1604 {
1605         struct nozomi *dc = get_dc_by_tty(tty);
1606         struct port *port = tty->driver_data;
1607         unsigned long flags;
1608
1609         if (!dc || !port)
1610                 return;
1611
1612         if (mutex_lock_interruptible(&port->tty_sem))
1613                 return;
1614
1615         if (!port->tty_open_count)
1616                 goto exit;
1617
1618         dc->open_ttys--;
1619         port->tty_open_count--;
1620
1621         if (port->tty_open_count == 0) {
1622                 DBG1("close: %d", port->token_dl);
1623                 spin_lock_irqsave(&dc->spin_mutex, flags);
1624                 dc->last_ier &= ~(port->token_dl);
1625                 writew(dc->last_ier, dc->reg_ier);
1626                 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1627         }
1628
1629 exit:
1630         mutex_unlock(&port->tty_sem);
1631 }
1632
1633 /*
1634  * called when the userspace process writes to the tty (/dev/noz*).
1635  * Data is inserted into a fifo, which is then read and transfered to the modem.
1636  */
1637 static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
1638                       int count)
1639 {
1640         int rval = -EINVAL;
1641         struct nozomi *dc = get_dc_by_tty(tty);
1642         struct port *port = tty->driver_data;
1643         unsigned long flags;
1644
1645         /* DBG1( "WRITEx: %d, index = %d", count, index); */
1646
1647         if (!dc || !port)
1648                 return -ENODEV;
1649
1650         if (unlikely(!mutex_trylock(&port->tty_sem))) {
1651                 /*
1652                  * must test lock as tty layer wraps calls
1653                  * to this function with BKL
1654                  */
1655                 dev_err(&dc->pdev->dev, "Would have deadlocked - "
1656                         "return EAGAIN\n");
1657                 return -EAGAIN;
1658         }
1659
1660         if (unlikely(!port->tty_open_count)) {
1661                 DBG1(" ");
1662                 goto exit;
1663         }
1664
1665         rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count);
1666
1667         /* notify card */
1668         if (unlikely(dc == NULL)) {
1669                 DBG1("No device context?");
1670                 goto exit;
1671         }
1672
1673         spin_lock_irqsave(&dc->spin_mutex, flags);
1674         /* CTS is only valid on the modem channel */
1675         if (port == &(dc->port[PORT_MDM])) {
1676                 if (port->ctrl_dl.CTS) {
1677                         DBG4("Enable interrupt");
1678                         enable_transmit_ul(tty->index % MAX_PORT, dc);
1679                 } else {
1680                         dev_err(&dc->pdev->dev,
1681                                 "CTS not active on modem port?\n");
1682                 }
1683         } else {
1684                 enable_transmit_ul(tty->index % MAX_PORT, dc);
1685         }
1686         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1687
1688 exit:
1689         mutex_unlock(&port->tty_sem);
1690         return rval;
1691 }
1692
1693 /*
1694  * Calculate how much is left in device
1695  * This method is called by the upper tty layer.
1696  *   #according to sources N_TTY.c it expects a value >= 0 and
1697  *    does not check for negative values.
1698  */
1699 static int ntty_write_room(struct tty_struct *tty)
1700 {
1701         struct port *port = tty->driver_data;
1702         int room = 0;
1703         const struct nozomi *dc = get_dc_by_tty(tty);
1704
1705         if (!dc || !port)
1706                 return 0;
1707         if (!mutex_trylock(&port->tty_sem))
1708                 return 0;
1709
1710         if (!port->tty_open_count)
1711                 goto exit;
1712
1713         room = port->fifo_ul->size - __kfifo_len(port->fifo_ul);
1714
1715 exit:
1716         mutex_unlock(&port->tty_sem);
1717         return room;
1718 }
1719
1720 /* Gets io control parameters */
1721 static int ntty_tiocmget(struct tty_struct *tty, struct file *file)
1722 {
1723         const struct port *port = tty->driver_data;
1724         const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
1725         const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
1726
1727         return  (ctrl_ul->RTS ? TIOCM_RTS : 0) |
1728                 (ctrl_ul->DTR ? TIOCM_DTR : 0) |
1729                 (ctrl_dl->DCD ? TIOCM_CAR : 0) |
1730                 (ctrl_dl->RI  ? TIOCM_RNG : 0) |
1731                 (ctrl_dl->DSR ? TIOCM_DSR : 0) |
1732                 (ctrl_dl->CTS ? TIOCM_CTS : 0);
1733 }
1734
1735 /* Sets io controls parameters */
1736 static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
1737         unsigned int set, unsigned int clear)
1738 {
1739         struct nozomi *dc = get_dc_by_tty(tty);
1740         unsigned long flags;
1741
1742         spin_lock_irqsave(&dc->spin_mutex, flags);
1743         if (set & TIOCM_RTS)
1744                 set_rts(tty, 1);
1745         else if (clear & TIOCM_RTS)
1746                 set_rts(tty, 0);
1747
1748         if (set & TIOCM_DTR)
1749                 set_dtr(tty, 1);
1750         else if (clear & TIOCM_DTR)
1751                 set_dtr(tty, 0);
1752         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1753
1754         return 0;
1755 }
1756
1757 static int ntty_cflags_changed(struct port *port, unsigned long flags,
1758                 struct async_icount *cprev)
1759 {
1760         const struct async_icount cnow = port->tty_icount;
1761         int ret;
1762
1763         ret =   ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1764                 ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1765                 ((flags & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1766                 ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
1767
1768         *cprev = cnow;
1769
1770         return ret;
1771 }
1772
1773 static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp)
1774 {
1775         const struct async_icount cnow = port->tty_icount;
1776         struct serial_icounter_struct icount;
1777
1778         icount.cts = cnow.cts;
1779         icount.dsr = cnow.dsr;
1780         icount.rng = cnow.rng;
1781         icount.dcd = cnow.dcd;
1782         icount.rx = cnow.rx;
1783         icount.tx = cnow.tx;
1784         icount.frame = cnow.frame;
1785         icount.overrun = cnow.overrun;
1786         icount.parity = cnow.parity;
1787         icount.brk = cnow.brk;
1788         icount.buf_overrun = cnow.buf_overrun;
1789
1790         return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0;
1791 }
1792
1793 static int ntty_ioctl(struct tty_struct *tty, struct file *file,
1794                       unsigned int cmd, unsigned long arg)
1795 {
1796         struct port *port = tty->driver_data;
1797         void __user *argp = (void __user *)arg;
1798         int rval = -ENOIOCTLCMD;
1799
1800         DBG1("******** IOCTL, cmd: %d", cmd);
1801
1802         switch (cmd) {
1803         case TIOCMIWAIT: {
1804                 struct async_icount cprev = port->tty_icount;
1805
1806                 rval = wait_event_interruptible(port->tty_wait,
1807                                 ntty_cflags_changed(port, arg, &cprev));
1808                 break;
1809         } case TIOCGICOUNT:
1810                 rval = ntty_ioctl_tiocgicount(port, argp);
1811                 break;
1812         default:
1813                 DBG1("ERR: 0x%08X, %d", cmd, cmd);
1814                 break;
1815         };
1816
1817         return rval;
1818 }
1819
1820 /*
1821  * Called by the upper tty layer when tty buffers are ready
1822  * to receive data again after a call to throttle.
1823  */
1824 static void ntty_unthrottle(struct tty_struct *tty)
1825 {
1826         struct nozomi *dc = get_dc_by_tty(tty);
1827         unsigned long flags;
1828
1829         DBG1("UNTHROTTLE");
1830         spin_lock_irqsave(&dc->spin_mutex, flags);
1831         enable_transmit_dl(tty->index % MAX_PORT, dc);
1832         set_rts(tty, 1);
1833
1834         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1835 }
1836
1837 /*
1838  * Called by the upper tty layer when the tty buffers are almost full.
1839  * The driver should stop send more data.
1840  */
1841 static void ntty_throttle(struct tty_struct *tty)
1842 {
1843         struct nozomi *dc = get_dc_by_tty(tty);
1844         unsigned long flags;
1845
1846         DBG1("THROTTLE");
1847         spin_lock_irqsave(&dc->spin_mutex, flags);
1848         set_rts(tty, 0);
1849         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1850 }
1851
1852 /* just to discard single character writes */
1853 static void ntty_put_char(struct tty_struct *tty, unsigned char c)
1854 {
1855         /*
1856          * card does not react correct when we write single chars
1857          * to the card, so we discard them
1858          */
1859         DBG2("PUT CHAR Function: %c", c);
1860 }
1861
1862 /* Returns number of chars in buffer, called by tty layer */
1863 static s32 ntty_chars_in_buffer(struct tty_struct *tty)
1864 {
1865         struct port *port = tty->driver_data;
1866         struct nozomi *dc = get_dc_by_tty(tty);
1867         s32 rval;
1868
1869         if (unlikely(!dc || !port)) {
1870                 rval = -ENODEV;
1871                 goto exit_in_buffer;
1872         }
1873
1874         if (unlikely(!port->tty_open_count)) {
1875                 dev_err(&dc->pdev->dev, "No tty open?\n");
1876                 rval = -ENODEV;
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         .put_char = ntty_put_char,
1896         .tiocmget = ntty_tiocmget,
1897         .tiocmset = ntty_tiocmset,
1898 };
1899
1900 /* Module initialization */
1901 static struct pci_driver nozomi_driver = {
1902         .name = NOZOMI_NAME,
1903         .id_table = nozomi_pci_tbl,
1904         .probe = nozomi_card_init,
1905         .remove = __devexit_p(nozomi_card_exit),
1906 };
1907
1908 static __init int nozomi_init(void)
1909 {
1910         int ret;
1911
1912         printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
1913
1914         ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
1915         if (!ntty_driver)
1916                 return -ENOMEM;
1917
1918         ntty_driver->owner = THIS_MODULE;
1919         ntty_driver->driver_name = NOZOMI_NAME_TTY;
1920         ntty_driver->name = "noz";
1921         ntty_driver->major = 0;
1922         ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1923         ntty_driver->subtype = SERIAL_TYPE_NORMAL;
1924         ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1925         ntty_driver->init_termios = tty_std_termios;
1926         ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
1927                                                 HUPCL | CLOCAL;
1928         ntty_driver->init_termios.c_ispeed = 115200;
1929         ntty_driver->init_termios.c_ospeed = 115200;
1930         tty_set_operations(ntty_driver, &tty_ops);
1931
1932         ret = tty_register_driver(ntty_driver);
1933         if (ret) {
1934                 printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
1935                 goto free_tty;
1936         }
1937
1938         ret = pci_register_driver(&nozomi_driver);
1939         if (ret) {
1940                 printk(KERN_ERR "Nozomi: can't register pci driver\n");
1941                 goto unr_tty;
1942         }
1943
1944         return 0;
1945 unr_tty:
1946         tty_unregister_driver(ntty_driver);
1947 free_tty:
1948         put_tty_driver(ntty_driver);
1949         return ret;
1950 }
1951
1952 static __exit void nozomi_exit(void)
1953 {
1954         printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
1955         pci_unregister_driver(&nozomi_driver);
1956         tty_unregister_driver(ntty_driver);
1957         put_tty_driver(ntty_driver);
1958 }
1959
1960 module_init(nozomi_init);
1961 module_exit(nozomi_exit);
1962
1963 module_param(debug, int, S_IRUGO | S_IWUSR);
1964
1965 MODULE_LICENSE("Dual BSD/GPL");
1966 MODULE_DESCRIPTION(DRIVER_DESC);