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nozomi: Add tty_port usage
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / nozomi.c
CommitLineData
20fd1e3b
FS		 1/*
2 * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
3 *
4 * Written by: Ulf Jakobsson,
e9ed537a 5 * Jan Åkerfeldt,
20fd1e3b
FS		 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
20fd1e3b
FS		 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>
d43c36dc 51#include <linux/sched.h>
20fd1e3b
FS		 52#include <linux/serial.h>
53#include <linux/interrupt.h>
54#include <linux/kmod.h>
55#include <linux/init.h>
56#include <linux/kfifo.h>
57#include <linux/uaccess.h>
58#include <asm/byteorder.h>
59
60#include <linux/delay.h>
61
62
63#define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \
64 __DATE__ " " __TIME__ ")"
65
66/* Macros definitions */
67
68/* Default debug printout level */
69#define NOZOMI_DEBUG_LEVEL 0x00
70
71#define P_BUF_SIZE 128
72#define NFO(_err_flag_, args...) \
73do { \
74 char tmp[P_BUF_SIZE]; \
75 snprintf(tmp, sizeof(tmp), ##args); \
76 printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \
bf9d8929 77 __func__, tmp); \
20fd1e3b
FS		 78} while (0)
79
80#define DBG1(args...) D_(0x01, ##args)
81#define DBG2(args...) D_(0x02, ##args)
82#define DBG3(args...) D_(0x04, ##args)
83#define DBG4(args...) D_(0x08, ##args)
84#define DBG5(args...) D_(0x10, ##args)
85#define DBG6(args...) D_(0x20, ##args)
86#define DBG7(args...) D_(0x40, ##args)
87#define DBG8(args...) D_(0x80, ##args)
88
89#ifdef DEBUG
90/* Do we need this settable at runtime? */
91static int debug = NOZOMI_DEBUG_LEVEL;
92
e9ed537a
FS		 93#define D(lvl, args...) do \
94 {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
95 while (0)
20fd1e3b
FS		 96#define D_(lvl, args...) D(lvl, ##args)
97
98/* These printouts are always printed */
99
100#else
101static int debug;
102#define D_(lvl, args...)
103#endif
104
105/* TODO: rewrite to optimize macros... */
106
107#define TMP_BUF_MAX 256
108
109#define DUMP(buf__,len__) \
110 do { \
111 char tbuf[TMP_BUF_MAX] = {0};\
112 if (len__ > 1) {\
113 snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
114 if (tbuf[len__-2] == '\r') {\
115 tbuf[len__-2] = 'r';\
116 } \
117 DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
118 } else {\
119 DBG1("SENDING: '%s' (%d)", tbuf, len__);\
120 } \
121} while (0)
122
123/* Defines */
124#define NOZOMI_NAME "nozomi"
125#define NOZOMI_NAME_TTY "nozomi_tty"
126#define DRIVER_DESC "Nozomi driver"
127
128#define NTTY_TTY_MAXMINORS 256
129#define NTTY_FIFO_BUFFER_SIZE 8192
130
131/* Must be power of 2 */
132#define FIFO_BUFFER_SIZE_UL 8192
133
134/* Size of tmp send buffer to card */
135#define SEND_BUF_MAX 1024
136#define RECEIVE_BUF_MAX 4
137
138
139/* Define all types of vendors and devices to support */
140#define VENDOR1 0x1931 /* Vendor Option */
141#define DEVICE1 0x000c /* HSDPA card */
142
143#define R_IIR 0x0000 /* Interrupt Identity Register */
144#define R_FCR 0x0000 /* Flow Control Register */
145#define R_IER 0x0004 /* Interrupt Enable Register */
146
147#define CONFIG_MAGIC 0xEFEFFEFE
148#define TOGGLE_VALID 0x0000
149
150/* Definition of interrupt tokens */
151#define MDM_DL1 0x0001
152#define MDM_UL1 0x0002
153#define MDM_DL2 0x0004
154#define MDM_UL2 0x0008
155#define DIAG_DL1 0x0010
156#define DIAG_DL2 0x0020
157#define DIAG_UL 0x0040
158#define APP1_DL 0x0080
159#define APP1_UL 0x0100
160#define APP2_DL 0x0200
161#define APP2_UL 0x0400
162#define CTRL_DL 0x0800
163#define CTRL_UL 0x1000
164#define RESET 0x8000
165
166#define MDM_DL (MDM_DL1 | MDM_DL2)
167#define MDM_UL (MDM_UL1 | MDM_UL2)
168#define DIAG_DL (DIAG_DL1 | DIAG_DL2)
169
170/* modem signal definition */
171#define CTRL_DSR 0x0001
172#define CTRL_DCD 0x0002
173#define CTRL_RI 0x0004
174#define CTRL_CTS 0x0008
175
176#define CTRL_DTR 0x0001
177#define CTRL_RTS 0x0002
178
179#define MAX_PORT 4
180#define NOZOMI_MAX_PORTS 5
181#define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT)
182
183/* Type definitions */
184
185/*
186 * There are two types of nozomi cards,
187 * one with 2048 memory and with 8192 memory
188 */
189enum card_type {
190 F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */
191 F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
192};
193
661b4e89
FS		 194/* Initialization states a card can be in */
195enum card_state {
196 NOZOMI_STATE_UKNOWN = 0,
197 NOZOMI_STATE_ENABLED = 1, /* pci device enabled */
198 NOZOMI_STATE_ALLOCATED = 2, /* config setup done */
199 NOZOMI_STATE_READY = 3, /* flowcontrols received */
200};
201
20fd1e3b
FS		 202/* Two different toggle channels exist */
203enum channel_type {
204 CH_A = 0,
205 CH_B = 1,
206};
207
208/* Port definition for the card regarding flow control */
209enum ctrl_port_type {
210 CTRL_CMD = 0,
211 CTRL_MDM = 1,
212 CTRL_DIAG = 2,
213 CTRL_APP1 = 3,
214 CTRL_APP2 = 4,
215 CTRL_ERROR = -1,
216};
217
218/* Ports that the nozomi has */
219enum port_type {
220 PORT_MDM = 0,
221 PORT_DIAG = 1,
222 PORT_APP1 = 2,
223 PORT_APP2 = 3,
224 PORT_CTRL = 4,
225 PORT_ERROR = -1,
226};
227
228#ifdef __BIG_ENDIAN
229/* Big endian */
230
231struct toggles {
e9ed537a 232 unsigned int enabled:5; /*
20fd1e3b
FS		 233 * Toggle fields are valid if enabled is 0,
234 * else A-channels must always be used.
235 */
e9ed537a
FS		 236 unsigned int diag_dl:1;
237 unsigned int mdm_dl:1;
238 unsigned int mdm_ul:1;
20fd1e3b
FS		 239} __attribute__ ((packed));
240
241/* Configuration table to read at startup of card */
242/* Is for now only needed during initialization phase */
243struct config_table {
244 u32 signature;
245 u16 product_information;
246 u16 version;
247 u8 pad3[3];
248 struct toggles toggle;
249 u8 pad1[4];
250 u16 dl_mdm_len1; /*
251 * If this is 64, it can hold
252 * 60 bytes + 4 that is length field
253 */
254 u16 dl_start;
255
256 u16 dl_diag_len1;
257 u16 dl_mdm_len2; /*
258 * If this is 64, it can hold
259 * 60 bytes + 4 that is length field
260 */
261 u16 dl_app1_len;
262
263 u16 dl_diag_len2;
264 u16 dl_ctrl_len;
265 u16 dl_app2_len;
266 u8 pad2[16];
267 u16 ul_mdm_len1;
268 u16 ul_start;
269 u16 ul_diag_len;
270 u16 ul_mdm_len2;
271 u16 ul_app1_len;
272 u16 ul_app2_len;
273 u16 ul_ctrl_len;
274} __attribute__ ((packed));
275
276/* This stores all control downlink flags */
277struct ctrl_dl {
278 u8 port;
e9ed537a
FS		 279 unsigned int reserved:4;
280 unsigned int CTS:1;
281 unsigned int RI:1;
282 unsigned int DCD:1;
283 unsigned int DSR:1;
20fd1e3b
FS		 284} __attribute__ ((packed));
285
286/* This stores all control uplink flags */
287struct ctrl_ul {
288 u8 port;
e9ed537a
FS		 289 unsigned int reserved:6;
290 unsigned int RTS:1;
291 unsigned int DTR:1;
20fd1e3b
FS		 292} __attribute__ ((packed));
293
294#else
295/* Little endian */
296
297/* This represents the toggle information */
298struct toggles {
e9ed537a
FS		 299 unsigned int mdm_ul:1;
300 unsigned int mdm_dl:1;
301 unsigned int diag_dl:1;
302 unsigned int enabled:5; /*
20fd1e3b
FS		 303 * Toggle fields are valid if enabled is 0,
304 * else A-channels must always be used.
305 */
306} __attribute__ ((packed));
307
308/* Configuration table to read at startup of card */
309struct config_table {
310 u32 signature;
311 u16 version;
312 u16 product_information;
313 struct toggles toggle;
314 u8 pad1[7];
315 u16 dl_start;
316 u16 dl_mdm_len1; /*
317 * If this is 64, it can hold
318 * 60 bytes + 4 that is length field
319 */
320 u16 dl_mdm_len2;
321 u16 dl_diag_len1;
322 u16 dl_diag_len2;
323 u16 dl_app1_len;
324 u16 dl_app2_len;
325 u16 dl_ctrl_len;
326 u8 pad2[16];
327 u16 ul_start;
328 u16 ul_mdm_len2;
329 u16 ul_mdm_len1;
330 u16 ul_diag_len;
331 u16 ul_app1_len;
332 u16 ul_app2_len;
333 u16 ul_ctrl_len;
334} __attribute__ ((packed));
335
336/* This stores all control downlink flags */
337struct ctrl_dl {
e9ed537a
FS		 338 unsigned int DSR:1;
339 unsigned int DCD:1;
340 unsigned int RI:1;
341 unsigned int CTS:1;
342 unsigned int reserverd:4;
20fd1e3b
FS		 343 u8 port;
344} __attribute__ ((packed));
345
346/* This stores all control uplink flags */
347struct ctrl_ul {
e9ed537a
FS		 348 unsigned int DTR:1;
349 unsigned int RTS:1;
350 unsigned int reserved:6;
20fd1e3b
FS		 351 u8 port;
352} __attribute__ ((packed));
353#endif
354
355/* This holds all information that is needed regarding a port */
356struct port {
33dd474a 357 struct tty_port port;
20fd1e3b
FS		 358 u8 update_flow_control;
359 struct ctrl_ul ctrl_ul;
360 struct ctrl_dl ctrl_dl;
45465487 361 struct kfifo fifo_ul;
20fd1e3b
FS		 362 void __iomem *dl_addr[2];
363 u32 dl_size[2];
364 u8 toggle_dl;
365 void __iomem *ul_addr[2];
366 u32 ul_size[2];
367 u8 toggle_ul;
368 u16 token_dl;
369
20fd1e3b
FS		 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;
266794eb
AC		 374
375 struct nozomi *dc;
20fd1e3b
FS		 376};
377
378/* Private data one for each card in the system */
379struct nozomi {
380 void __iomem *base_addr;
381 unsigned long flip;
382
383 /* Pointers to registers */
384 void __iomem *reg_iir;
385 void __iomem *reg_fcr;
386 void __iomem *reg_ier;
387
388 u16 last_ier;
389 enum card_type card_type;
390 struct config_table config_table; /* Configuration table */
391 struct pci_dev *pdev;
392 struct port port[NOZOMI_MAX_PORTS];
393 u8 *send_buf;
394
395 spinlock_t spin_mutex; /* secures access to registers and tty */
396
397 unsigned int index_start;
661b4e89 398 enum card_state state;
20fd1e3b
FS		 399 u32 open_ttys;
400};
401
402/* This is a data packet that is read or written to/from card */
403struct buffer {
404 u32 size; /* size is the length of the data buffer */
405 u8 *data;
406} __attribute__ ((packed));
407
408/* Global variables */
18bbe0c2 409static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
20fd1e3b
FS		 410 {PCI_DEVICE(VENDOR1, DEVICE1)},
411 {},
412};
413
414MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
415
416static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
417static struct tty_driver *ntty_driver;
418
266794eb
AC		 419static const struct tty_port_operations noz_tty_port_ops;
420
20fd1e3b
FS		 421/*
422 * find card by tty_index
423 */
424static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
425{
426 return tty ? ndevs[tty->index / MAX_PORT] : NULL;
427}
428
429static inline struct port *get_port_by_tty(const struct tty_struct *tty)
430{
431 struct nozomi *ndev = get_dc_by_tty(tty);
432 return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
433}
434
435/*
436 * TODO:
437 * -Optimize
438 * -Rewrite cleaner
439 */
440
441static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
442 u32 size_bytes)
443{
444 u32 i = 0;
782a6de4 445 const u32 __iomem *ptr = mem_addr_start;
20fd1e3b
FS		 446 u16 *buf16;
447
448 if (unlikely(!ptr || !buf))
449 goto out;
450
451 /* shortcut for extremely often used cases */
452 switch (size_bytes) {
453 case 2: /* 2 bytes */
454 buf16 = (u16 *) buf;
782a6de4 455 *buf16 = __le16_to_cpu(readw(ptr));
20fd1e3b
FS		 456 goto out;
457 break;
458 case 4: /* 4 bytes */
782a6de4 459 *(buf) = __le32_to_cpu(readl(ptr));
20fd1e3b
FS		 460 goto out;
461 break;
462 }
463
464 while (i < size_bytes) {
465 if (size_bytes - i == 2) {
466 /* Handle 2 bytes in the end */
467 buf16 = (u16 *) buf;
782a6de4 468 *(buf16) = __le16_to_cpu(readw(ptr));
20fd1e3b
FS		 469 i += 2;
470 } else {
471 /* Read 4 bytes */
782a6de4 472 *(buf) = __le32_to_cpu(readl(ptr));
20fd1e3b
FS		 473 i += 4;
474 }
475 buf++;
476 ptr++;
477 }
478out:
479 return;
480}
481
482/*
483 * TODO:
484 * -Optimize
485 * -Rewrite cleaner
486 */
71e1b4ab 487static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
20fd1e3b
FS		 488 u32 size_bytes)
489{
490 u32 i = 0;
782a6de4 491 u32 __iomem *ptr = mem_addr_start;
71e1b4ab 492 const u16 *buf16;
20fd1e3b
FS		 493
494 if (unlikely(!ptr || !buf))
495 return 0;
496
497 /* shortcut for extremely often used cases */
498 switch (size_bytes) {
499 case 2: /* 2 bytes */
71e1b4ab 500 buf16 = (const u16 *)buf;
782a6de4 501 writew(__cpu_to_le16(*buf16), ptr);
20fd1e3b
FS		 502 return 2;
503 break;
504 case 1: /*
505 * also needs to write 4 bytes in this case
506 * so falling through..
507 */
508 case 4: /* 4 bytes */
782a6de4 509 writel(__cpu_to_le32(*buf), ptr);
20fd1e3b
FS		 510 return 4;
511 break;
512 }
513
514 while (i < size_bytes) {
515 if (size_bytes - i == 2) {
516 /* 2 bytes */
71e1b4ab 517 buf16 = (const u16 *)buf;
782a6de4 518 writew(__cpu_to_le16(*buf16), ptr);
20fd1e3b
FS		 519 i += 2;
520 } else {
521 /* 4 bytes */
782a6de4 522 writel(__cpu_to_le32(*buf), ptr);
20fd1e3b
FS		 523 i += 4;
524 }
525 buf++;
526 ptr++;
527 }
528 return i;
529}
530
531/* Setup pointers to different channels and also setup buffer sizes. */
532static void setup_memory(struct nozomi *dc)
533{
534 void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
535 /* The length reported is including the length field of 4 bytes,
536 * hence subtract with 4.
537 */
538 const u16 buff_offset = 4;
539
540 /* Modem port dl configuration */
541 dc->port[PORT_MDM].dl_addr[CH_A] = offset;
542 dc->port[PORT_MDM].dl_addr[CH_B] =
543 (offset += dc->config_table.dl_mdm_len1);
544 dc->port[PORT_MDM].dl_size[CH_A] =
545 dc->config_table.dl_mdm_len1 - buff_offset;
546 dc->port[PORT_MDM].dl_size[CH_B] =
547 dc->config_table.dl_mdm_len2 - buff_offset;
548
549 /* Diag port dl configuration */
550 dc->port[PORT_DIAG].dl_addr[CH_A] =
551 (offset += dc->config_table.dl_mdm_len2);
552 dc->port[PORT_DIAG].dl_size[CH_A] =
553 dc->config_table.dl_diag_len1 - buff_offset;
554 dc->port[PORT_DIAG].dl_addr[CH_B] =
555 (offset += dc->config_table.dl_diag_len1);
556 dc->port[PORT_DIAG].dl_size[CH_B] =
557 dc->config_table.dl_diag_len2 - buff_offset;
558
559 /* App1 port dl configuration */
560 dc->port[PORT_APP1].dl_addr[CH_A] =
561 (offset += dc->config_table.dl_diag_len2);
562 dc->port[PORT_APP1].dl_size[CH_A] =
563 dc->config_table.dl_app1_len - buff_offset;
564
565 /* App2 port dl configuration */
566 dc->port[PORT_APP2].dl_addr[CH_A] =
567 (offset += dc->config_table.dl_app1_len);
568 dc->port[PORT_APP2].dl_size[CH_A] =
569 dc->config_table.dl_app2_len - buff_offset;
570
571 /* Ctrl dl configuration */
572 dc->port[PORT_CTRL].dl_addr[CH_A] =
573 (offset += dc->config_table.dl_app2_len);
574 dc->port[PORT_CTRL].dl_size[CH_A] =
575 dc->config_table.dl_ctrl_len - buff_offset;
576
577 offset = dc->base_addr + dc->config_table.ul_start;
578
579 /* Modem Port ul configuration */
580 dc->port[PORT_MDM].ul_addr[CH_A] = offset;
581 dc->port[PORT_MDM].ul_size[CH_A] =
582 dc->config_table.ul_mdm_len1 - buff_offset;
583 dc->port[PORT_MDM].ul_addr[CH_B] =
584 (offset += dc->config_table.ul_mdm_len1);
585 dc->port[PORT_MDM].ul_size[CH_B] =
586 dc->config_table.ul_mdm_len2 - buff_offset;
587
588 /* Diag port ul configuration */
589 dc->port[PORT_DIAG].ul_addr[CH_A] =
590 (offset += dc->config_table.ul_mdm_len2);
591 dc->port[PORT_DIAG].ul_size[CH_A] =
592 dc->config_table.ul_diag_len - buff_offset;
593
594 /* App1 port ul configuration */
595 dc->port[PORT_APP1].ul_addr[CH_A] =
596 (offset += dc->config_table.ul_diag_len);
597 dc->port[PORT_APP1].ul_size[CH_A] =
598 dc->config_table.ul_app1_len - buff_offset;
599
600 /* App2 port ul configuration */
601 dc->port[PORT_APP2].ul_addr[CH_A] =
602 (offset += dc->config_table.ul_app1_len);
603 dc->port[PORT_APP2].ul_size[CH_A] =
604 dc->config_table.ul_app2_len - buff_offset;
605
606 /* Ctrl ul configuration */
607 dc->port[PORT_CTRL].ul_addr[CH_A] =
608 (offset += dc->config_table.ul_app2_len);
609 dc->port[PORT_CTRL].ul_size[CH_A] =
610 dc->config_table.ul_ctrl_len - buff_offset;
611}
612
613/* Dump config table under initalization phase */
614#ifdef DEBUG
615static void dump_table(const struct nozomi *dc)
616{
617 DBG3("signature: 0x%08X", dc->config_table.signature);
618 DBG3("version: 0x%04X", dc->config_table.version);
619 DBG3("product_information: 0x%04X", \
620 dc->config_table.product_information);
621 DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
622 DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
623 DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
624 DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
625
626 DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
627 DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
628 dc->config_table.dl_mdm_len1);
629 DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
630 dc->config_table.dl_mdm_len2);
631 DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
632 dc->config_table.dl_diag_len1);
633 DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
634 dc->config_table.dl_diag_len2);
635 DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
636 dc->config_table.dl_app1_len);
637 DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
638 dc->config_table.dl_app2_len);
639 DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
640 dc->config_table.dl_ctrl_len);
641 DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
642 dc->config_table.ul_start);
643 DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
644 dc->config_table.ul_mdm_len1);
645 DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
646 dc->config_table.ul_mdm_len2);
647 DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
648 dc->config_table.ul_diag_len);
649 DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
650 dc->config_table.ul_app1_len);
651 DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
652 dc->config_table.ul_app2_len);
653 DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
654 dc->config_table.ul_ctrl_len);
655}
656#else
e9ed537a 657static inline void dump_table(const struct nozomi *dc) { }
20fd1e3b
FS		 658#endif
659
660/*
661 * Read configuration table from card under intalization phase
662 * Returns 1 if ok, else 0
663 */
664static int nozomi_read_config_table(struct nozomi *dc)
665{
666 read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
667 sizeof(struct config_table));
668
669 if (dc->config_table.signature != CONFIG_MAGIC) {
670 dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
671 dc->config_table.signature, CONFIG_MAGIC);
672 return 0;
673 }
674
675 if ((dc->config_table.version == 0)
676 || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
677 int i;
678 DBG1("Second phase, configuring card");
679
680 setup_memory(dc);
681
682 dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
683 dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
684 dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
685 DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
686 dc->port[PORT_MDM].toggle_ul,
687 dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
688
689 dump_table(dc);
690
691 for (i = PORT_MDM; i < MAX_PORT; i++) {
20fd1e3b
FS		 692 memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
693 memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
694 }
695
696 /* Enable control channel */
697 dc->last_ier = dc->last_ier | CTRL_DL;
698 writew(dc->last_ier, dc->reg_ier);
699
661b4e89 700 dc->state = NOZOMI_STATE_ALLOCATED;
20fd1e3b
FS		 701 dev_info(&dc->pdev->dev, "Initialization OK!\n");
702 return 1;
703 }
704
705 if ((dc->config_table.version > 0)
706 && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
707 u32 offset = 0;
708 DBG1("First phase: pushing upload buffers, clearing download");
709
710 dev_info(&dc->pdev->dev, "Version of card: %d\n",
711 dc->config_table.version);
712
713 /* Here we should disable all I/O over F32. */
714 setup_memory(dc);
715
716 /*
717 * We should send ALL channel pair tokens back along
718 * with reset token
719 */
720
721 /* push upload modem buffers */
722 write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
723 (u32 *) &offset, 4);
724 write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
725 (u32 *) &offset, 4);
726
727 writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
728
729 DBG1("First phase done");
730 }
731
732 return 1;
733}
734
735/* Enable uplink interrupts */
736static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
737{
71e1b4ab 738 static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
20fd1e3b
FS		 739
740 if (port < NOZOMI_MAX_PORTS) {
741 dc->last_ier |= mask[port];
742 writew(dc->last_ier, dc->reg_ier);
743 } else {
744 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
745 }
746}
747
748/* Disable uplink interrupts */
749static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
750{
71e1b4ab
JE		 751 static const u16 mask[] =
752 {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
20fd1e3b
FS		 753
754 if (port < NOZOMI_MAX_PORTS) {
755 dc->last_ier &= mask[port];
756 writew(dc->last_ier, dc->reg_ier);
757 } else {
758 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
759 }
760}
761
762/* Enable downlink interrupts */
763static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
764{
71e1b4ab 765 static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
20fd1e3b
FS		 766
767 if (port < NOZOMI_MAX_PORTS) {
768 dc->last_ier |= mask[port];
769 writew(dc->last_ier, dc->reg_ier);
770 } else {
771 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
772 }
773}
774
775/* Disable downlink interrupts */
776static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
777{
71e1b4ab
JE		 778 static const u16 mask[] =
779 {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
20fd1e3b
FS		 780
781 if (port < NOZOMI_MAX_PORTS) {
782 dc->last_ier &= mask[port];
783 writew(dc->last_ier, dc->reg_ier);
784 } else {
785 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
786 }
787}
788
789/*
790 * Return 1 - send buffer to card and ack.
791 * Return 0 - don't ack, don't send buffer to card.
792 */
33dd474a 793static int send_data(enum port_type index, struct nozomi *dc)
20fd1e3b
FS		 794{
795 u32 size = 0;
33dd474a 796 struct port *port = &dc->port[index];
18bbe0c2 797 const u8 toggle = port->toggle_ul;
20fd1e3b 798 void __iomem *addr = port->ul_addr[toggle];
18bbe0c2 799 const u32 ul_size = port->ul_size[toggle];
33dd474a 800 struct tty_struct *tty = tty_port_tty_get(&port->port);
20fd1e3b
FS		 801
802 /* Get data from tty and place in buf for now */
7acd72eb 803 size = kfifo_out(&port->fifo_ul, dc->send_buf,
20fd1e3b
FS		 804 ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
805
806 if (size == 0) {
807 DBG4("No more data to send, disable link:");
33dd474a 808 tty_kref_put(tty);
20fd1e3b
FS		 809 return 0;
810 }
811
812 /* DUMP(buf, size); */
813
814 /* Write length + data */
815 write_mem32(addr, (u32 *) &size, 4);
816 write_mem32(addr + 4, (u32 *) dc->send_buf, size);
817
818 if (tty)
819 tty_wakeup(tty);
820
33dd474a 821 tty_kref_put(tty);
20fd1e3b
FS		 822 return 1;
823}
824
825/* If all data has been read, return 1, else 0 */
826static int receive_data(enum port_type index, struct nozomi *dc)
827{
828 u8 buf[RECEIVE_BUF_MAX] = { 0 };
829 int size;
830 u32 offset = 4;
831 struct port *port = &dc->port[index];
832 void __iomem *addr = port->dl_addr[port->toggle_dl];
33dd474a 833 struct tty_struct *tty = tty_port_tty_get(&port->port);
9237a81a 834 int i, ret;
20fd1e3b
FS		 835
836 if (unlikely(!tty)) {
837 DBG1("tty not open for port: %d?", index);
838 return 1;
839 }
840
841 read_mem32((u32 *) &size, addr, 4);
842 /* DBG1( "%d bytes port: %d", size, index); */
843
844 if (test_bit(TTY_THROTTLED, &tty->flags)) {
845 DBG1("No room in tty, don't read data, don't ack interrupt, "
846 "disable interrupt");
847
848 /* disable interrupt in downlink... */
849 disable_transmit_dl(index, dc);
9237a81a
JS		 850 ret = 0;
851 goto put;
20fd1e3b
FS		 852 }
853
854 if (unlikely(size == 0)) {
855 dev_err(&dc->pdev->dev, "size == 0?\n");
9237a81a
JS		 856 ret = 1;
857 goto put;
20fd1e3b
FS		 858 }
859
860 tty_buffer_request_room(tty, size);
861
862 while (size > 0) {
863 read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
864
865 if (size == 1) {
866 tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
867 size = 0;
868 } else if (size < RECEIVE_BUF_MAX) {
869 size -= tty_insert_flip_string(tty, (char *) buf, size);
870 } else {
871 i = tty_insert_flip_string(tty, \
872 (char *) buf, RECEIVE_BUF_MAX);
873 size -= i;
874 offset += i;
875 }
876 }
877
878 set_bit(index, &dc->flip);
9237a81a
JS		 879 ret = 1;
880put:
33dd474a 881 tty_kref_put(tty);
9237a81a 882 return ret;
20fd1e3b
FS		 883}
884
885/* Debug for interrupts */
886#ifdef DEBUG
887static char *interrupt2str(u16 interrupt)
888{
889 static char buf[TMP_BUF_MAX];
890 char *p = buf;
891
892 interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
893 interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
894 "MDM_DL2 ") : NULL;
895
896 interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
897 "MDM_UL1 ") : NULL;
898 interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
899 "MDM_UL2 ") : NULL;
900
901 interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
902 "DIAG_DL1 ") : NULL;
903 interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
904 "DIAG_DL2 ") : NULL;
905
906 interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
907 "DIAG_UL ") : NULL;
908
909 interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
910 "APP1_DL ") : NULL;
911 interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
912 "APP2_DL ") : NULL;
913
914 interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
915 "APP1_UL ") : NULL;
916 interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
917 "APP2_UL ") : NULL;
918
919 interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
920 "CTRL_DL ") : NULL;
921 interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
922 "CTRL_UL ") : NULL;
923
924 interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
925 "RESET ") : NULL;
926
927 return buf;
928}
929#endif
930
931/*
932 * Receive flow control
933 * Return 1 - If ok, else 0
934 */
935static int receive_flow_control(struct nozomi *dc)
936{
937 enum port_type port = PORT_MDM;
938 struct ctrl_dl ctrl_dl;
939 struct ctrl_dl old_ctrl;
940 u16 enable_ier = 0;
941
942 read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
943
944 switch (ctrl_dl.port) {
945 case CTRL_CMD:
946 DBG1("The Base Band sends this value as a response to a "
947 "request for IMSI detach sent over the control "
948 "channel uplink (see section 7.6.1).");
949 break;
950 case CTRL_MDM:
951 port = PORT_MDM;
952 enable_ier = MDM_DL;
953 break;
954 case CTRL_DIAG:
955 port = PORT_DIAG;
956 enable_ier = DIAG_DL;
957 break;
958 case CTRL_APP1:
959 port = PORT_APP1;
960 enable_ier = APP1_DL;
961 break;
962 case CTRL_APP2:
963 port = PORT_APP2;
964 enable_ier = APP2_DL;
661b4e89
FS		 965 if (dc->state == NOZOMI_STATE_ALLOCATED) {
966 /*
967 * After card initialization the flow control
968 * received for APP2 is always the last
969 */
970 dc->state = NOZOMI_STATE_READY;
971 dev_info(&dc->pdev->dev, "Device READY!\n");
972 }
20fd1e3b
FS		 973 break;
974 default:
975 dev_err(&dc->pdev->dev,
976 "ERROR: flow control received for non-existing port\n");
977 return 0;
978 };
979
980 DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
981 *((u16 *)&ctrl_dl));
982
983 old_ctrl = dc->port[port].ctrl_dl;
984 dc->port[port].ctrl_dl = ctrl_dl;
985
986 if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
987 DBG1("Disable interrupt (0x%04X) on port: %d",
988 enable_ier, port);
989 disable_transmit_ul(port, dc);
990
991 } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
992
e64c026d 993 if (kfifo_len(&dc->port[port].fifo_ul)) {
20fd1e3b
FS		 994 DBG1("Enable interrupt (0x%04X) on port: %d",
995 enable_ier, port);
996 DBG1("Data in buffer [%d], enable transmit! ",
e64c026d 997 kfifo_len(&dc->port[port].fifo_ul));
20fd1e3b
FS		 998 enable_transmit_ul(port, dc);
999 } else {
1000 DBG1("No data in buffer...");
1001 }
1002 }
1003
1004 if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
1005 DBG1(" No change in mctrl");
1006 return 1;
1007 }
1008 /* Update statistics */
1009 if (old_ctrl.CTS != ctrl_dl.CTS)
1010 dc->port[port].tty_icount.cts++;
1011 if (old_ctrl.DSR != ctrl_dl.DSR)
1012 dc->port[port].tty_icount.dsr++;
1013 if (old_ctrl.RI != ctrl_dl.RI)
1014 dc->port[port].tty_icount.rng++;
1015 if (old_ctrl.DCD != ctrl_dl.DCD)
1016 dc->port[port].tty_icount.dcd++;
1017
1018 wake_up_interruptible(&dc->port[port].tty_wait);
1019
1020 DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
1021 port,
1022 dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
1023 dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
1024
1025 return 1;
1026}
1027
1028static enum ctrl_port_type port2ctrl(enum port_type port,
1029 const struct nozomi *dc)
1030{
1031 switch (port) {
1032 case PORT_MDM:
1033 return CTRL_MDM;
1034 case PORT_DIAG:
1035 return CTRL_DIAG;
1036 case PORT_APP1:
1037 return CTRL_APP1;
1038 case PORT_APP2:
1039 return CTRL_APP2;
1040 default:
1041 dev_err(&dc->pdev->dev,
1042 "ERROR: send flow control " \
1043 "received for non-existing port\n");
1044 };
1045 return CTRL_ERROR;
1046}
1047
1048/*
1049 * Send flow control, can only update one channel at a time
1050 * Return 0 - If we have updated all flow control
1051 * Return 1 - If we need to update more flow control, ack current enable more
1052 */
1053static int send_flow_control(struct nozomi *dc)
1054{
1055 u32 i, more_flow_control_to_be_updated = 0;
1056 u16 *ctrl;
1057
1058 for (i = PORT_MDM; i < MAX_PORT; i++) {
1059 if (dc->port[i].update_flow_control) {
1060 if (more_flow_control_to_be_updated) {
1061 /* We have more flow control to be updated */
1062 return 1;
1063 }
1064 dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
1065 ctrl = (u16 *)&dc->port[i].ctrl_ul;
1066 write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
1067 (u32 *) ctrl, 2);
1068 dc->port[i].update_flow_control = 0;
1069 more_flow_control_to_be_updated = 1;
1070 }
1071 }
1072 return 0;
1073}
1074
1075/*
e9ed537a 1076 * Handle downlink data, ports that are handled are modem and diagnostics
20fd1e3b
FS		 1077 * Return 1 - ok
1078 * Return 0 - toggle fields are out of sync
1079 */
1080static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
1081 u16 read_iir, u16 mask1, u16 mask2)
1082{
1083 if (*toggle == 0 && read_iir & mask1) {
1084 if (receive_data(port, dc)) {
1085 writew(mask1, dc->reg_fcr);
1086 *toggle = !(*toggle);
1087 }
1088
1089 if (read_iir & mask2) {
1090 if (receive_data(port, dc)) {
1091 writew(mask2, dc->reg_fcr);
1092 *toggle = !(*toggle);
1093 }
1094 }
1095 } else if (*toggle == 1 && read_iir & mask2) {
1096 if (receive_data(port, dc)) {
1097 writew(mask2, dc->reg_fcr);
1098 *toggle = !(*toggle);
1099 }
1100
1101 if (read_iir & mask1) {
1102 if (receive_data(port, dc)) {
1103 writew(mask1, dc->reg_fcr);
1104 *toggle = !(*toggle);
1105 }
1106 }
1107 } else {
1108 dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
1109 *toggle);
1110 return 0;
1111 }
1112 return 1;
1113}
1114
1115/*
1116 * Handle uplink data, this is currently for the modem port
1117 * Return 1 - ok
1118 * Return 0 - toggle field are out of sync
1119 */
1120static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
1121{
1122 u8 *toggle = &(dc->port[port].toggle_ul);
1123
1124 if (*toggle == 0 && read_iir & MDM_UL1) {
1125 dc->last_ier &= ~MDM_UL;
1126 writew(dc->last_ier, dc->reg_ier);
1127 if (send_data(port, dc)) {
1128 writew(MDM_UL1, dc->reg_fcr);
1129 dc->last_ier = dc->last_ier | MDM_UL;
1130 writew(dc->last_ier, dc->reg_ier);
1131 *toggle = !*toggle;
1132 }
1133
1134 if (read_iir & MDM_UL2) {
1135 dc->last_ier &= ~MDM_UL;
1136 writew(dc->last_ier, dc->reg_ier);
1137 if (send_data(port, dc)) {
1138 writew(MDM_UL2, dc->reg_fcr);
1139 dc->last_ier = dc->last_ier | MDM_UL;
1140 writew(dc->last_ier, dc->reg_ier);
1141 *toggle = !*toggle;
1142 }
1143 }
1144
1145 } else if (*toggle == 1 && read_iir & MDM_UL2) {
1146 dc->last_ier &= ~MDM_UL;
1147 writew(dc->last_ier, dc->reg_ier);
1148 if (send_data(port, dc)) {
1149 writew(MDM_UL2, dc->reg_fcr);
1150 dc->last_ier = dc->last_ier | MDM_UL;
1151 writew(dc->last_ier, dc->reg_ier);
1152 *toggle = !*toggle;
1153 }
1154
1155 if (read_iir & MDM_UL1) {
1156 dc->last_ier &= ~MDM_UL;
1157 writew(dc->last_ier, dc->reg_ier);
1158 if (send_data(port, dc)) {
1159 writew(MDM_UL1, dc->reg_fcr);
1160 dc->last_ier = dc->last_ier | MDM_UL;
1161 writew(dc->last_ier, dc->reg_ier);
1162 *toggle = !*toggle;
1163 }
1164 }
1165 } else {
1166 writew(read_iir & MDM_UL, dc->reg_fcr);
1167 dev_err(&dc->pdev->dev, "port out of sync!\n");
1168 return 0;
1169 }
1170 return 1;
1171}
1172
1173static irqreturn_t interrupt_handler(int irq, void *dev_id)
1174{
1175 struct nozomi *dc = dev_id;
1176 unsigned int a;
1177 u16 read_iir;
1178
1179 if (!dc)
1180 return IRQ_NONE;
1181
1182 spin_lock(&dc->spin_mutex);
1183 read_iir = readw(dc->reg_iir);
1184
1185 /* Card removed */
1186 if (read_iir == (u16)-1)
1187 goto none;
1188 /*
1189 * Just handle interrupt enabled in IER
1190 * (by masking with dc->last_ier)
1191 */
1192 read_iir &= dc->last_ier;
1193
1194 if (read_iir == 0)
1195 goto none;
1196
1197
1198 DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
1199 dc->last_ier);
1200
1201 if (read_iir & RESET) {
1202 if (unlikely(!nozomi_read_config_table(dc))) {
1203 dc->last_ier = 0x0;
1204 writew(dc->last_ier, dc->reg_ier);
1205 dev_err(&dc->pdev->dev, "Could not read status from "
1206 "card, we should disable interface\n");
1207 } else {
1208 writew(RESET, dc->reg_fcr);
1209 }
1210 /* No more useful info if this was the reset interrupt. */
1211 goto exit_handler;
1212 }
1213 if (read_iir & CTRL_UL) {
1214 DBG1("CTRL_UL");
1215 dc->last_ier &= ~CTRL_UL;
1216 writew(dc->last_ier, dc->reg_ier);
1217 if (send_flow_control(dc)) {
1218 writew(CTRL_UL, dc->reg_fcr);
1219 dc->last_ier = dc->last_ier | CTRL_UL;
1220 writew(dc->last_ier, dc->reg_ier);
1221 }
1222 }
1223 if (read_iir & CTRL_DL) {
1224 receive_flow_control(dc);
1225 writew(CTRL_DL, dc->reg_fcr);
1226 }
1227 if (read_iir & MDM_DL) {
1228 if (!handle_data_dl(dc, PORT_MDM,
1229 &(dc->port[PORT_MDM].toggle_dl), read_iir,
1230 MDM_DL1, MDM_DL2)) {
1231 dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
1232 goto exit_handler;
1233 }
1234 }
1235 if (read_iir & MDM_UL) {
1236 if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
1237 dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
1238 goto exit_handler;
1239 }
1240 }
1241 if (read_iir & DIAG_DL) {
1242 if (!handle_data_dl(dc, PORT_DIAG,
1243 &(dc->port[PORT_DIAG].toggle_dl), read_iir,
1244 DIAG_DL1, DIAG_DL2)) {
1245 dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
1246 goto exit_handler;
1247 }
1248 }
1249 if (read_iir & DIAG_UL) {
1250 dc->last_ier &= ~DIAG_UL;
1251 writew(dc->last_ier, dc->reg_ier);
1252 if (send_data(PORT_DIAG, dc)) {
1253 writew(DIAG_UL, dc->reg_fcr);
1254 dc->last_ier = dc->last_ier | DIAG_UL;
1255 writew(dc->last_ier, dc->reg_ier);
1256 }
1257 }
1258 if (read_iir & APP1_DL) {
1259 if (receive_data(PORT_APP1, dc))
1260 writew(APP1_DL, dc->reg_fcr);
1261 }
1262 if (read_iir & APP1_UL) {
1263 dc->last_ier &= ~APP1_UL;
1264 writew(dc->last_ier, dc->reg_ier);
1265 if (send_data(PORT_APP1, dc)) {
1266 writew(APP1_UL, dc->reg_fcr);
1267 dc->last_ier = dc->last_ier | APP1_UL;
1268 writew(dc->last_ier, dc->reg_ier);
1269 }
1270 }
1271 if (read_iir & APP2_DL) {
1272 if (receive_data(PORT_APP2, dc))
1273 writew(APP2_DL, dc->reg_fcr);
1274 }
1275 if (read_iir & APP2_UL) {
1276 dc->last_ier &= ~APP2_UL;
1277 writew(dc->last_ier, dc->reg_ier);
1278 if (send_data(PORT_APP2, dc)) {
1279 writew(APP2_UL, dc->reg_fcr);
1280 dc->last_ier = dc->last_ier | APP2_UL;
1281 writew(dc->last_ier, dc->reg_ier);
1282 }
1283 }
1284
1285exit_handler:
1286 spin_unlock(&dc->spin_mutex);
33dd474a
AC		 1287 for (a = 0; a < NOZOMI_MAX_PORTS; a++) {
1288 struct tty_struct *tty;
1289 if (test_and_clear_bit(a, &dc->flip)) {
1290 tty = tty_port_tty_get(&dc->port[a].port);
1291 if (tty)
1292 tty_flip_buffer_push(tty);
1293 tty_kref_put(tty);
1294 }
1295 }
20fd1e3b
FS		 1296 return IRQ_HANDLED;
1297none:
1298 spin_unlock(&dc->spin_mutex);
1299 return IRQ_NONE;
1300}
1301
1302static void nozomi_get_card_type(struct nozomi *dc)
1303{
1304 int i;
1305 u32 size = 0;
1306
1307 for (i = 0; i < 6; i++)
1308 size += pci_resource_len(dc->pdev, i);
1309
1310 /* Assume card type F32_8 if no match */
1311 dc->card_type = size == 2048 ? F32_2 : F32_8;
1312
1313 dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
1314}
1315
1316static void nozomi_setup_private_data(struct nozomi *dc)
1317{
1318 void __iomem *offset = dc->base_addr + dc->card_type / 2;
1319 unsigned int i;
1320
1321 dc->reg_fcr = (void __iomem *)(offset + R_FCR);
1322 dc->reg_iir = (void __iomem *)(offset + R_IIR);
1323 dc->reg_ier = (void __iomem *)(offset + R_IER);
1324 dc->last_ier = 0;
1325 dc->flip = 0;
1326
1327 dc->port[PORT_MDM].token_dl = MDM_DL;
1328 dc->port[PORT_DIAG].token_dl = DIAG_DL;
1329 dc->port[PORT_APP1].token_dl = APP1_DL;
1330 dc->port[PORT_APP2].token_dl = APP2_DL;
1331
1332 for (i = 0; i < MAX_PORT; i++)
1333 init_waitqueue_head(&dc->port[i].tty_wait);
1334}
1335
1336static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
1337 char *buf)
1338{
71e1b4ab 1339 const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
20fd1e3b
FS		 1340
1341 return sprintf(buf, "%d\n", dc->card_type);
1342}
e9ed537a 1343static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
20fd1e3b
FS		 1344
1345static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
1346 char *buf)
1347{
71e1b4ab 1348 const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
20fd1e3b
FS		 1349
1350 return sprintf(buf, "%u\n", dc->open_ttys);
1351}
e9ed537a 1352static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
20fd1e3b
FS		 1353
1354static void make_sysfs_files(struct nozomi *dc)
1355{
1356 if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
1357 dev_err(&dc->pdev->dev,
1358 "Could not create sysfs file for card_type\n");
1359 if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
1360 dev_err(&dc->pdev->dev,
1361 "Could not create sysfs file for open_ttys\n");
1362}
1363
1364static void remove_sysfs_files(struct nozomi *dc)
1365{
1366 device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
1367 device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
1368}
1369
1370/* Allocate memory for one device */
1371static int __devinit nozomi_card_init(struct pci_dev *pdev,
1372 const struct pci_device_id *ent)
1373{
1374 resource_size_t start;
1375 int ret;
1376 struct nozomi *dc = NULL;
1377 int ndev_idx;
1378 int i;
1379
1380 dev_dbg(&pdev->dev, "Init, new card found\n");
1381
1382 for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
1383 if (!ndevs[ndev_idx])
1384 break;
1385
1386 if (ndev_idx >= ARRAY_SIZE(ndevs)) {
1387 dev_err(&pdev->dev, "no free tty range for this card left\n");
1388 ret = -EIO;
1389 goto err;
1390 }
1391
1392 dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
1393 if (unlikely(!dc)) {
1394 dev_err(&pdev->dev, "Could not allocate memory\n");
1395 ret = -ENOMEM;
1396 goto err_free;
1397 }
1398
1399 dc->pdev = pdev;
1400
20fd1e3b
FS		 1401 ret = pci_enable_device(dc->pdev);
1402 if (ret) {
1403 dev_err(&pdev->dev, "Failed to enable PCI Device\n");
1404 goto err_free;
1405 }
1406
20fd1e3b
FS		 1407 ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
1408 if (ret) {
1409 dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
1410 (int) /* nozomi_private.io_addr */ 0);
1411 goto err_disable_device;
1412 }
1413
661b4e89
FS		 1414 start = pci_resource_start(dc->pdev, 0);
1415 if (start == 0) {
1416 dev_err(&pdev->dev, "No I/O address for card detected\n");
1417 ret = -ENODEV;
1418 goto err_rel_regs;
1419 }
1420
1421 /* Find out what card type it is */
1422 nozomi_get_card_type(dc);
1423
24cb2335 1424 dc->base_addr = ioremap_nocache(start, dc->card_type);
20fd1e3b
FS		 1425 if (!dc->base_addr) {
1426 dev_err(&pdev->dev, "Unable to map card MMIO\n");
1427 ret = -ENODEV;
1428 goto err_rel_regs;
1429 }
1430
1431 dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
1432 if (!dc->send_buf) {
1433 dev_err(&pdev->dev, "Could not allocate send buffer?\n");
1434 ret = -ENOMEM;
1435 goto err_free_sbuf;
1436 }
1437
9842c38e
SS		 1438 for (i = PORT_MDM; i < MAX_PORT; i++) {
1439 if (kfifo_alloc(&dc->port[i].fifo_ul,
1440 FIFO_BUFFER_SIZE_UL, GFP_ATOMIC)) {
1441 dev_err(&pdev->dev,
1442 "Could not allocate kfifo buffer\n");
1443 ret = -ENOMEM;
1444 goto err_free_kfifo;
1445 }
1446 }
1447
20fd1e3b
FS		 1448 spin_lock_init(&dc->spin_mutex);
1449
1450 nozomi_setup_private_data(dc);
1451
1452 /* Disable all interrupts */
1453 dc->last_ier = 0;
1454 writew(dc->last_ier, dc->reg_ier);
1455
1456 ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
1457 NOZOMI_NAME, dc);
1458 if (unlikely(ret)) {
1459 dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
9842c38e 1460 goto err_free_kfifo;
20fd1e3b
FS		 1461 }
1462
1463 DBG1("base_addr: %p", dc->base_addr);
1464
1465 make_sysfs_files(dc);
1466
1467 dc->index_start = ndev_idx * MAX_PORT;
1468 ndevs[ndev_idx] = dc;
1469
661b4e89
FS		 1470 pci_set_drvdata(pdev, dc);
1471
1472 /* Enable RESET interrupt */
1473 dc->last_ier = RESET;
1474 iowrite16(dc->last_ier, dc->reg_ier);
1475
1476 dc->state = NOZOMI_STATE_ENABLED;
1477
20fd1e3b 1478 for (i = 0; i < MAX_PORT; i++) {
9842c38e 1479 struct device *tty_dev;
266794eb
AC		 1480 struct port *port = &dc->port[i];
1481 port->dc = dc;
1482 mutex_init(&port->tty_sem);
1483 tty_port_init(&port->port);
1484 port->port.ops = &noz_tty_port_ops;
9842c38e 1485 tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
20fd1e3b 1486 &pdev->dev);
9842c38e
SS		 1487
1488 if (IS_ERR(tty_dev)) {
1489 ret = PTR_ERR(tty_dev);
1490 dev_err(&pdev->dev, "Could not allocate tty?\n");
1491 goto err_free_tty;
1492 }
20fd1e3b 1493 }
9842c38e 1494
20fd1e3b
FS		 1495 return 0;
1496
9842c38e
SS		 1497err_free_tty:
1498 for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
1499 tty_unregister_device(ntty_driver, i);
1500err_free_kfifo:
1501 for (i = 0; i < MAX_PORT; i++)
1502 kfifo_free(&dc->port[i].fifo_ul);
20fd1e3b
FS		 1503err_free_sbuf:
1504 kfree(dc->send_buf);
1505 iounmap(dc->base_addr);
1506err_rel_regs:
1507 pci_release_regions(pdev);
1508err_disable_device:
1509 pci_disable_device(pdev);
1510err_free:
1511 kfree(dc);
1512err:
1513 return ret;
1514}
1515
1516static void __devexit tty_exit(struct nozomi *dc)
1517{
1518 unsigned int i;
1519
1520 DBG1(" ");
1521
1522 flush_scheduled_work();
1523
33dd474a
AC		 1524 for (i = 0; i < MAX_PORT; ++i) {
1525 struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
1526 if (tty && list_empty(&tty->hangup_work.entry))
1527 tty_hangup(tty);
1528 tty_kref_put(tty);
1529 }
1530 /* Racy below - surely should wait for scheduled work to be done or
1531 complete off a hangup method ? */
20fd1e3b
FS		 1532 while (dc->open_ttys)
1533 msleep(1);
20fd1e3b
FS		 1534 for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
1535 tty_unregister_device(ntty_driver, i);
1536}
1537
1538/* Deallocate memory for one device */
1539static void __devexit nozomi_card_exit(struct pci_dev *pdev)
1540{
1541 int i;
1542 struct ctrl_ul ctrl;
1543 struct nozomi *dc = pci_get_drvdata(pdev);
1544
1545 /* Disable all interrupts */
1546 dc->last_ier = 0;
1547 writew(dc->last_ier, dc->reg_ier);
1548
1549 tty_exit(dc);
1550
1551 /* Send 0x0001, command card to resend the reset token. */
1552 /* This is to get the reset when the module is reloaded. */
1553 ctrl.port = 0x00;
1554 ctrl.reserved = 0;
1555 ctrl.RTS = 0;
1556 ctrl.DTR = 1;
1557 DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
1558
1559 /* Setup dc->reg addresses to we can use defines here */
1560 write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
1561 writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */
1562
1563 remove_sysfs_files(dc);
1564
1565 free_irq(pdev->irq, dc);
1566
1567 for (i = 0; i < MAX_PORT; i++)
45465487 1568 kfifo_free(&dc->port[i].fifo_ul);
20fd1e3b
FS		 1569
1570 kfree(dc->send_buf);
1571
1572 iounmap(dc->base_addr);
1573
1574 pci_release_regions(pdev);
1575
1576 pci_disable_device(pdev);
1577
1578 ndevs[dc->index_start / MAX_PORT] = NULL;
1579
1580 kfree(dc);
1581}
1582
1583static void set_rts(const struct tty_struct *tty, int rts)
1584{
1585 struct port *port = get_port_by_tty(tty);
1586
1587 port->ctrl_ul.RTS = rts;
1588 port->update_flow_control = 1;
1589 enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1590}
1591
1592static void set_dtr(const struct tty_struct *tty, int dtr)
1593{
1594 struct port *port = get_port_by_tty(tty);
1595
1596 DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
1597
1598 port->ctrl_ul.DTR = dtr;
1599 port->update_flow_control = 1;
1600 enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1601}
1602
1603/*
1604 * ----------------------------------------------------------------------------
1605 * TTY code
1606 * ----------------------------------------------------------------------------
1607 */
1608
266794eb 1609static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
20fd1e3b
FS		 1610{
1611 struct port *port = get_port_by_tty(tty);
1612 struct nozomi *dc = get_dc_by_tty(tty);
266794eb 1613 int ret;
661b4e89 1614 if (!port || !dc || dc->state != NOZOMI_STATE_READY)
20fd1e3b 1615 return -ENODEV;
266794eb
AC		 1616 ret = tty_init_termios(tty);
1617 if (ret == 0) {
1618 tty_driver_kref_get(driver);
1619 driver->ttys[tty->index] = tty;
20fd1e3b 1620 }
266794eb 1621 return ret;
20fd1e3b
FS		 1622}
1623
266794eb
AC		 1624static void ntty_cleanup(struct tty_struct *tty)
1625{
1626 tty->driver_data = NULL;
1627}
716da631 1628
266794eb 1629static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
20fd1e3b 1630{
266794eb
AC		 1631 struct port *port = container_of(tport, struct port, port);
1632 struct nozomi *dc = port->dc;
20fd1e3b
FS		 1633 unsigned long flags;
1634
266794eb
AC		 1635 DBG1("open: %d", port->token_dl);
1636 spin_lock_irqsave(&dc->spin_mutex, flags);
1637 dc->last_ier = dc->last_ier | port->token_dl;
1638 writew(dc->last_ier, dc->reg_ier);
1639 dc->open_ttys++;
1640 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1641 printk("noz: activated %d: %p\n", tty->index, tport);
1642 return 0;
1643}
20fd1e3b 1644
266794eb
AC		 1645static int ntty_open(struct tty_struct *tty, struct file *filp)
1646{
1647 struct port *port = get_port_by_tty(tty);
1648 return tty_port_open(&port->port, tty, filp);
1649}
20fd1e3b 1650
266794eb
AC		 1651static void ntty_shutdown(struct tty_port *tport)
1652{
1653 struct port *port = container_of(tport, struct port, port);
1654 struct nozomi *dc = port->dc;
1655 unsigned long flags;
20fd1e3b 1656
266794eb
AC		 1657 DBG1("close: %d", port->token_dl);
1658 spin_lock_irqsave(&dc->spin_mutex, flags);
1659 dc->last_ier &= ~(port->token_dl);
1660 writew(dc->last_ier, dc->reg_ier);
20fd1e3b 1661 dc->open_ttys--;
266794eb
AC		 1662 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1663 printk("noz: shutdown %p\n", tport);
1664}
20fd1e3b 1665
266794eb
AC		 1666static void ntty_close(struct tty_struct *tty, struct file *filp)
1667{
1668 struct port *port = tty->driver_data;
1669 if (port)
1670 tty_port_close(&port->port, tty, filp);
1671}
1672
1673static void ntty_hangup(struct tty_struct *tty)
1674{
1675 struct port *port = tty->driver_data;
1676 tty_port_hangup(&port->port);
20fd1e3b
FS		 1677}
1678
1679/*
1680 * called when the userspace process writes to the tty (/dev/noz*).
1681 * Data is inserted into a fifo, which is then read and transfered to the modem.
1682 */
1683static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
1684 int count)
1685{
1686 int rval = -EINVAL;
1687 struct nozomi *dc = get_dc_by_tty(tty);
1688 struct port *port = tty->driver_data;
1689 unsigned long flags;
1690
1691 /* DBG1( "WRITEx: %d, index = %d", count, index); */
1692
1693 if (!dc || !port)
1694 return -ENODEV;
1695
1696 if (unlikely(!mutex_trylock(&port->tty_sem))) {
1697 /*
1698 * must test lock as tty layer wraps calls
1699 * to this function with BKL
1700 */
1701 dev_err(&dc->pdev->dev, "Would have deadlocked - "
1702 "return EAGAIN\n");
1703 return -EAGAIN;
1704 }
1705
33dd474a 1706 if (unlikely(!port->port.count)) {
20fd1e3b
FS		 1707 DBG1(" ");
1708 goto exit;
1709 }
1710
7acd72eb 1711 rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
20fd1e3b
FS		 1712
1713 /* notify card */
1714 if (unlikely(dc == NULL)) {
1715 DBG1("No device context?");
1716 goto exit;
1717 }
1718
1719 spin_lock_irqsave(&dc->spin_mutex, flags);
1720 /* CTS is only valid on the modem channel */
1721 if (port == &(dc->port[PORT_MDM])) {
1722 if (port->ctrl_dl.CTS) {
1723 DBG4("Enable interrupt");
1724 enable_transmit_ul(tty->index % MAX_PORT, dc);
1725 } else {
1726 dev_err(&dc->pdev->dev,
1727 "CTS not active on modem port?\n");
1728 }
1729 } else {
1730 enable_transmit_ul(tty->index % MAX_PORT, dc);
1731 }
1732 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1733
1734exit:
1735 mutex_unlock(&port->tty_sem);
1736 return rval;
1737}
1738
1739/*
1740 * Calculate how much is left in device
1741 * This method is called by the upper tty layer.
1742 * #according to sources N_TTY.c it expects a value >= 0 and
1743 * does not check for negative values.
1744 */
1745static int ntty_write_room(struct tty_struct *tty)
1746{
1747 struct port *port = tty->driver_data;
1748 int room = 0;
71e1b4ab 1749 const struct nozomi *dc = get_dc_by_tty(tty);
20fd1e3b
FS		 1750
1751 if (!dc || !port)
1752 return 0;
1753 if (!mutex_trylock(&port->tty_sem))
1754 return 0;
1755
33dd474a 1756 if (!port->port.count)
20fd1e3b
FS		 1757 goto exit;
1758
e64c026d 1759 room = port->fifo_ul.size - kfifo_len(&port->fifo_ul);
20fd1e3b
FS		 1760
1761exit:
1762 mutex_unlock(&port->tty_sem);
1763 return room;
1764}
1765
1766/* Gets io control parameters */
1767static int ntty_tiocmget(struct tty_struct *tty, struct file *file)
1768{
71e1b4ab
JE		 1769 const struct port *port = tty->driver_data;
1770 const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
1771 const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
20fd1e3b 1772
978e595f
AC		 1773 /* Note: these could change under us but it is not clear this
1774 matters if so */
20fd1e3b
FS		 1775 return (ctrl_ul->RTS ? TIOCM_RTS : 0) |
1776 (ctrl_ul->DTR ? TIOCM_DTR : 0) |
1777 (ctrl_dl->DCD ? TIOCM_CAR : 0) |
1778 (ctrl_dl->RI ? TIOCM_RNG : 0) |
1779 (ctrl_dl->DSR ? TIOCM_DSR : 0) |
1780 (ctrl_dl->CTS ? TIOCM_CTS : 0);
1781}
1782
1783/* Sets io controls parameters */
1784static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
1785 unsigned int set, unsigned int clear)
1786{
661b4e89
FS		 1787 struct nozomi *dc = get_dc_by_tty(tty);
1788 unsigned long flags;
1789
1790 spin_lock_irqsave(&dc->spin_mutex, flags);
20fd1e3b
FS		 1791 if (set & TIOCM_RTS)
1792 set_rts(tty, 1);
1793 else if (clear & TIOCM_RTS)
1794 set_rts(tty, 0);
1795
1796 if (set & TIOCM_DTR)
1797 set_dtr(tty, 1);
1798 else if (clear & TIOCM_DTR)
1799 set_dtr(tty, 0);
661b4e89 1800 spin_unlock_irqrestore(&dc->spin_mutex, flags);
20fd1e3b
FS		 1801
1802 return 0;
1803}
1804
1805static int ntty_cflags_changed(struct port *port, unsigned long flags,
1806 struct async_icount *cprev)
1807{
18bbe0c2 1808 const struct async_icount cnow = port->tty_icount;
20fd1e3b
FS		 1809 int ret;
1810
1811 ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1812 ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1813 ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1814 ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
1815
1816 *cprev = cnow;
1817
1818 return ret;
1819}
1820
1821static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp)
1822{
18bbe0c2 1823 const struct async_icount cnow = port->tty_icount;
20fd1e3b
FS		 1824 struct serial_icounter_struct icount;
1825
1826 icount.cts = cnow.cts;
1827 icount.dsr = cnow.dsr;
1828 icount.rng = cnow.rng;
1829 icount.dcd = cnow.dcd;
1830 icount.rx = cnow.rx;
1831 icount.tx = cnow.tx;
1832 icount.frame = cnow.frame;
1833 icount.overrun = cnow.overrun;
1834 icount.parity = cnow.parity;
1835 icount.brk = cnow.brk;
1836 icount.buf_overrun = cnow.buf_overrun;
1837
661b4e89 1838 return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0;
20fd1e3b
FS		 1839}
1840
1841static int ntty_ioctl(struct tty_struct *tty, struct file *file,
1842 unsigned int cmd, unsigned long arg)
1843{
1844 struct port *port = tty->driver_data;
1845 void __user *argp = (void __user *)arg;
1846 int rval = -ENOIOCTLCMD;
1847
1848 DBG1("******** IOCTL, cmd: %d", cmd);
1849
1850 switch (cmd) {
1851 case TIOCMIWAIT: {
1852 struct async_icount cprev = port->tty_icount;
1853
1854 rval = wait_event_interruptible(port->tty_wait,
1855 ntty_cflags_changed(port, arg, &cprev));
1856 break;
1857 } case TIOCGICOUNT:
1858 rval = ntty_ioctl_tiocgicount(port, argp);
1859 break;
1860 default:
1861 DBG1("ERR: 0x%08X, %d", cmd, cmd);
1862 break;
1863 };
1864
1865 return rval;
1866}
1867
1868/*
1869 * Called by the upper tty layer when tty buffers are ready
1870 * to receive data again after a call to throttle.
1871 */
1872static void ntty_unthrottle(struct tty_struct *tty)
1873{
1874 struct nozomi *dc = get_dc_by_tty(tty);
1875 unsigned long flags;
1876
1877 DBG1("UNTHROTTLE");
1878 spin_lock_irqsave(&dc->spin_mutex, flags);
1879 enable_transmit_dl(tty->index % MAX_PORT, dc);
1880 set_rts(tty, 1);
1881
1882 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1883}
1884
1885/*
1886 * Called by the upper tty layer when the tty buffers are almost full.
1887 * The driver should stop send more data.
1888 */
1889static void ntty_throttle(struct tty_struct *tty)
1890{
1891 struct nozomi *dc = get_dc_by_tty(tty);
1892 unsigned long flags;
1893
1894 DBG1("THROTTLE");
1895 spin_lock_irqsave(&dc->spin_mutex, flags);
1896 set_rts(tty, 0);
1897 spin_unlock_irqrestore(&dc->spin_mutex, flags);
1898}
1899
20fd1e3b
FS		 1900/* Returns number of chars in buffer, called by tty layer */
1901static s32 ntty_chars_in_buffer(struct tty_struct *tty)
1902{
1903 struct port *port = tty->driver_data;
1904 struct nozomi *dc = get_dc_by_tty(tty);
23198fda 1905 s32 rval = 0;
20fd1e3b
FS		 1906
1907 if (unlikely(!dc || !port)) {
20fd1e3b
FS		 1908 goto exit_in_buffer;
1909 }
1910
33dd474a 1911 if (unlikely(!port->port.count)) {
20fd1e3b 1912 dev_err(&dc->pdev->dev, "No tty open?\n");
20fd1e3b
FS		 1913 goto exit_in_buffer;
1914 }
1915
e64c026d 1916 rval = kfifo_len(&port->fifo_ul);
20fd1e3b
FS		 1917
1918exit_in_buffer:
1919 return rval;
1920}
1921
266794eb
AC		 1922static const struct tty_port_operations noz_tty_port_ops = {
1923 .activate = ntty_activate,
1924 .shutdown = ntty_shutdown,
1925};
1926
18bbe0c2 1927static const struct tty_operations tty_ops = {
20fd1e3b
FS		 1928 .ioctl = ntty_ioctl,
1929 .open = ntty_open,
1930 .close = ntty_close,
266794eb 1931 .hangup = ntty_hangup,
20fd1e3b
FS		 1932 .write = ntty_write,
1933 .write_room = ntty_write_room,
1934 .unthrottle = ntty_unthrottle,
1935 .throttle = ntty_throttle,
1936 .chars_in_buffer = ntty_chars_in_buffer,
20fd1e3b
FS		 1937 .tiocmget = ntty_tiocmget,
1938 .tiocmset = ntty_tiocmset,
266794eb
AC		 1939 .install = ntty_install,
1940 .cleanup = ntty_cleanup,
20fd1e3b
FS		 1941};
1942
1943/* Module initialization */
1944static struct pci_driver nozomi_driver = {
1945 .name = NOZOMI_NAME,
1946 .id_table = nozomi_pci_tbl,
1947 .probe = nozomi_card_init,
1948 .remove = __devexit_p(nozomi_card_exit),
1949};
1950
1951static __init int nozomi_init(void)
1952{
1953 int ret;
1954
1955 printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
1956
1957 ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
1958 if (!ntty_driver)
1959 return -ENOMEM;
1960
1961 ntty_driver->owner = THIS_MODULE;
1962 ntty_driver->driver_name = NOZOMI_NAME_TTY;
1963 ntty_driver->name = "noz";
1964 ntty_driver->major = 0;
1965 ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1966 ntty_driver->subtype = SERIAL_TYPE_NORMAL;
1967 ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1968 ntty_driver->init_termios = tty_std_termios;
1969 ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
1970 HUPCL | CLOCAL;
1971 ntty_driver->init_termios.c_ispeed = 115200;
1972 ntty_driver->init_termios.c_ospeed = 115200;
1973 tty_set_operations(ntty_driver, &tty_ops);
1974
1975 ret = tty_register_driver(ntty_driver);
1976 if (ret) {
1977 printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
1978 goto free_tty;
1979 }
1980
1981 ret = pci_register_driver(&nozomi_driver);
1982 if (ret) {
1983 printk(KERN_ERR "Nozomi: can't register pci driver\n");
1984 goto unr_tty;
1985 }
1986
1987 return 0;
1988unr_tty:
1989 tty_unregister_driver(ntty_driver);
1990free_tty:
1991 put_tty_driver(ntty_driver);
1992 return ret;
1993}
1994
1995static __exit void nozomi_exit(void)
1996{
1997 printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
1998 pci_unregister_driver(&nozomi_driver);
1999 tty_unregister_driver(ntty_driver);
2000 put_tty_driver(ntty_driver);
2001}
2002
2003module_init(nozomi_init);
2004module_exit(nozomi_exit);
2005
2006module_param(debug, int, S_IRUGO | S_IWUSR);
2007
2008MODULE_LICENSE("Dual BSD/GPL");
2009MODULE_DESCRIPTION(DRIVER_DESC);
kernel source for telekom puls (alcatel/mediatek)