diff options
Diffstat (limited to 'drivers/char/nozomi.c')
-rw-r--r-- | drivers/char/nozomi.c | 1993 |
1 files changed, 1993 insertions, 0 deletions
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c new file mode 100644 index 000000000000..6076e662886a --- /dev/null +++ b/drivers/char/nozomi.c | |||
@@ -0,0 +1,1993 @@ | |||
1 | /* | ||
2 | * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter | ||
3 | * | ||
4 | * Written by: Ulf Jakobsson, | ||
5 | * Jan �erfeldt, | ||
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 | /* | ||
42 | * CHANGELOG | ||
43 | * Version 2.1d | ||
44 | * 11-November-2007 Jiri Slaby, Frank Seidel | ||
45 | * - Big rework of multicard support by Jiri | ||
46 | * - Major cleanups (semaphore to mutex, endianess, no major reservation) | ||
47 | * - Optimizations | ||
48 | * | ||
49 | * Version 2.1c | ||
50 | * 30-October-2007 Frank Seidel | ||
51 | * - Completed multicard support | ||
52 | * - Minor cleanups | ||
53 | * | ||
54 | * Version 2.1b | ||
55 | * 07-August-2007 Frank Seidel | ||
56 | * - Minor cleanups | ||
57 | * - theoretical multicard support | ||
58 | * | ||
59 | * Version 2.1 | ||
60 | * 03-July-2006 Paul Hardwick | ||
61 | * | ||
62 | * - Stability Improvements. Incorporated spinlock wraps patch. | ||
63 | * - Updated for newer 2.6.14+ kernels (tty_buffer_request_room) | ||
64 | * - using __devexit macro for tty | ||
65 | * | ||
66 | * | ||
67 | * Version 2.0 | ||
68 | * 08-feb-2006 15:34:10:Ulf | ||
69 | * | ||
70 | * -Fixed issue when not waking up line disipine layer, could probably result | ||
71 | * in better uplink performance for 2.4. | ||
72 | * | ||
73 | * -Fixed issue with big endian during initalization, now proper toggle flags | ||
74 | * are handled between preloader and maincode. | ||
75 | * | ||
76 | * -Fixed flow control issue. | ||
77 | * | ||
78 | * -Added support for setting DTR. | ||
79 | * | ||
80 | * -For 2.4 kernels, removing temporary buffer that's not needed. | ||
81 | * | ||
82 | * -Reading CTS only for modem port (only port that supports it). | ||
83 | * | ||
84 | * -Return 0 in write_room instead of netative value, it's not handled in | ||
85 | * upper layer. | ||
86 | * | ||
87 | * -------------------------------------------------------------------------- | ||
88 | * Version 1.0 | ||
89 | * | ||
90 | * First version of driver, only tested with card of type F32_2. | ||
91 | * Works fine with 2.4 and 2.6 kernels. | ||
92 | * Driver also support big endian architecture. | ||
93 | */ | ||
94 | |||
95 | /* Enable this to have a lot of debug printouts */ | ||
96 | #define DEBUG | ||
97 | |||
98 | #include <linux/kernel.h> | ||
99 | #include <linux/module.h> | ||
100 | #include <linux/pci.h> | ||
101 | #include <linux/ioport.h> | ||
102 | #include <linux/tty.h> | ||
103 | #include <linux/tty_driver.h> | ||
104 | #include <linux/tty_flip.h> | ||
105 | #include <linux/serial.h> | ||
106 | #include <linux/interrupt.h> | ||
107 | #include <linux/kmod.h> | ||
108 | #include <linux/init.h> | ||
109 | #include <linux/kfifo.h> | ||
110 | #include <linux/uaccess.h> | ||
111 | #include <asm/byteorder.h> | ||
112 | |||
113 | #include <linux/delay.h> | ||
114 | |||
115 | |||
116 | #define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \ | ||
117 | __DATE__ " " __TIME__ ")" | ||
118 | |||
119 | /* Macros definitions */ | ||
120 | |||
121 | /* Default debug printout level */ | ||
122 | #define NOZOMI_DEBUG_LEVEL 0x00 | ||
123 | |||
124 | #define P_BUF_SIZE 128 | ||
125 | #define NFO(_err_flag_, args...) \ | ||
126 | do { \ | ||
127 | char tmp[P_BUF_SIZE]; \ | ||
128 | snprintf(tmp, sizeof(tmp), ##args); \ | ||
129 | printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \ | ||
130 | __FUNCTION__, tmp); \ | ||
131 | } while (0) | ||
132 | |||
133 | #define DBG1(args...) D_(0x01, ##args) | ||
134 | #define DBG2(args...) D_(0x02, ##args) | ||
135 | #define DBG3(args...) D_(0x04, ##args) | ||
136 | #define DBG4(args...) D_(0x08, ##args) | ||
137 | #define DBG5(args...) D_(0x10, ##args) | ||
138 | #define DBG6(args...) D_(0x20, ##args) | ||
139 | #define DBG7(args...) D_(0x40, ##args) | ||
140 | #define DBG8(args...) D_(0x80, ##args) | ||
141 | |||
142 | #ifdef DEBUG | ||
143 | /* Do we need this settable at runtime? */ | ||
144 | static int debug = NOZOMI_DEBUG_LEVEL; | ||
145 | |||
146 | #define D(lvl, args...) do {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \ | ||
147 | while (0) | ||
148 | #define D_(lvl, args...) D(lvl, ##args) | ||
149 | |||
150 | /* These printouts are always printed */ | ||
151 | |||
152 | #else | ||
153 | static int debug; | ||
154 | #define D_(lvl, args...) | ||
155 | #endif | ||
156 | |||
157 | /* TODO: rewrite to optimize macros... */ | ||
158 | |||
159 | #define TMP_BUF_MAX 256 | ||
160 | |||
161 | #define DUMP(buf__,len__) \ | ||
162 | do { \ | ||
163 | char tbuf[TMP_BUF_MAX] = {0};\ | ||
164 | if (len__ > 1) {\ | ||
165 | snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\ | ||
166 | if (tbuf[len__-2] == '\r') {\ | ||
167 | tbuf[len__-2] = 'r';\ | ||
168 | } \ | ||
169 | DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\ | ||
170 | } else {\ | ||
171 | DBG1("SENDING: '%s' (%d)", tbuf, len__);\ | ||
172 | } \ | ||
173 | } while (0) | ||
174 | |||
175 | /* Defines */ | ||
176 | #define NOZOMI_NAME "nozomi" | ||
177 | #define NOZOMI_NAME_TTY "nozomi_tty" | ||
178 | #define DRIVER_DESC "Nozomi driver" | ||
179 | |||
180 | #define NTTY_TTY_MAXMINORS 256 | ||
181 | #define NTTY_FIFO_BUFFER_SIZE 8192 | ||
182 | |||
183 | /* Must be power of 2 */ | ||
184 | #define FIFO_BUFFER_SIZE_UL 8192 | ||
185 | |||
186 | /* Size of tmp send buffer to card */ | ||
187 | #define SEND_BUF_MAX 1024 | ||
188 | #define RECEIVE_BUF_MAX 4 | ||
189 | |||
190 | |||
191 | /* Define all types of vendors and devices to support */ | ||
192 | #define VENDOR1 0x1931 /* Vendor Option */ | ||
193 | #define DEVICE1 0x000c /* HSDPA card */ | ||
194 | |||
195 | #define R_IIR 0x0000 /* Interrupt Identity Register */ | ||
196 | #define R_FCR 0x0000 /* Flow Control Register */ | ||
197 | #define R_IER 0x0004 /* Interrupt Enable Register */ | ||
198 | |||
199 | #define CONFIG_MAGIC 0xEFEFFEFE | ||
200 | #define TOGGLE_VALID 0x0000 | ||
201 | |||
202 | /* Definition of interrupt tokens */ | ||
203 | #define MDM_DL1 0x0001 | ||
204 | #define MDM_UL1 0x0002 | ||
205 | #define MDM_DL2 0x0004 | ||
206 | #define MDM_UL2 0x0008 | ||
207 | #define DIAG_DL1 0x0010 | ||
208 | #define DIAG_DL2 0x0020 | ||
209 | #define DIAG_UL 0x0040 | ||
210 | #define APP1_DL 0x0080 | ||
211 | #define APP1_UL 0x0100 | ||
212 | #define APP2_DL 0x0200 | ||
213 | #define APP2_UL 0x0400 | ||
214 | #define CTRL_DL 0x0800 | ||
215 | #define CTRL_UL 0x1000 | ||
216 | #define RESET 0x8000 | ||
217 | |||
218 | #define MDM_DL (MDM_DL1 | MDM_DL2) | ||
219 | #define MDM_UL (MDM_UL1 | MDM_UL2) | ||
220 | #define DIAG_DL (DIAG_DL1 | DIAG_DL2) | ||
221 | |||
222 | /* modem signal definition */ | ||
223 | #define CTRL_DSR 0x0001 | ||
224 | #define CTRL_DCD 0x0002 | ||
225 | #define CTRL_RI 0x0004 | ||
226 | #define CTRL_CTS 0x0008 | ||
227 | |||
228 | #define CTRL_DTR 0x0001 | ||
229 | #define CTRL_RTS 0x0002 | ||
230 | |||
231 | #define MAX_PORT 4 | ||
232 | #define NOZOMI_MAX_PORTS 5 | ||
233 | #define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT) | ||
234 | |||
235 | /* Type definitions */ | ||
236 | |||
237 | /* | ||
238 | * There are two types of nozomi cards, | ||
239 | * one with 2048 memory and with 8192 memory | ||
240 | */ | ||
241 | enum card_type { | ||
242 | F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */ | ||
243 | F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */ | ||
244 | }; | ||
245 | |||
246 | /* Two different toggle channels exist */ | ||
247 | enum channel_type { | ||
248 | CH_A = 0, | ||
249 | CH_B = 1, | ||
250 | }; | ||
251 | |||
252 | /* Port definition for the card regarding flow control */ | ||
253 | enum ctrl_port_type { | ||
254 | CTRL_CMD = 0, | ||
255 | CTRL_MDM = 1, | ||
256 | CTRL_DIAG = 2, | ||
257 | CTRL_APP1 = 3, | ||
258 | CTRL_APP2 = 4, | ||
259 | CTRL_ERROR = -1, | ||
260 | }; | ||
261 | |||
262 | /* Ports that the nozomi has */ | ||
263 | enum port_type { | ||
264 | PORT_MDM = 0, | ||
265 | PORT_DIAG = 1, | ||
266 | PORT_APP1 = 2, | ||
267 | PORT_APP2 = 3, | ||
268 | PORT_CTRL = 4, | ||
269 | PORT_ERROR = -1, | ||
270 | }; | ||
271 | |||
272 | #ifdef __BIG_ENDIAN | ||
273 | /* Big endian */ | ||
274 | |||
275 | struct toggles { | ||
276 | unsigned enabled:5; /* | ||
277 | * Toggle fields are valid if enabled is 0, | ||
278 | * else A-channels must always be used. | ||
279 | */ | ||
280 | unsigned diag_dl:1; | ||
281 | unsigned mdm_dl:1; | ||
282 | unsigned mdm_ul:1; | ||
283 | } __attribute__ ((packed)); | ||
284 | |||
285 | /* Configuration table to read at startup of card */ | ||
286 | /* Is for now only needed during initialization phase */ | ||
287 | struct config_table { | ||
288 | u32 signature; | ||
289 | u16 product_information; | ||
290 | u16 version; | ||
291 | u8 pad3[3]; | ||
292 | struct toggles toggle; | ||
293 | u8 pad1[4]; | ||
294 | u16 dl_mdm_len1; /* | ||
295 | * If this is 64, it can hold | ||
296 | * 60 bytes + 4 that is length field | ||
297 | */ | ||
298 | u16 dl_start; | ||
299 | |||
300 | u16 dl_diag_len1; | ||
301 | u16 dl_mdm_len2; /* | ||
302 | * If this is 64, it can hold | ||
303 | * 60 bytes + 4 that is length field | ||
304 | */ | ||
305 | u16 dl_app1_len; | ||
306 | |||
307 | u16 dl_diag_len2; | ||
308 | u16 dl_ctrl_len; | ||
309 | u16 dl_app2_len; | ||
310 | u8 pad2[16]; | ||
311 | u16 ul_mdm_len1; | ||
312 | u16 ul_start; | ||
313 | u16 ul_diag_len; | ||
314 | u16 ul_mdm_len2; | ||
315 | u16 ul_app1_len; | ||
316 | u16 ul_app2_len; | ||
317 | u16 ul_ctrl_len; | ||
318 | } __attribute__ ((packed)); | ||
319 | |||
320 | /* This stores all control downlink flags */ | ||
321 | struct ctrl_dl { | ||
322 | u8 port; | ||
323 | unsigned reserved:4; | ||
324 | unsigned CTS:1; | ||
325 | unsigned RI:1; | ||
326 | unsigned DCD:1; | ||
327 | unsigned DSR:1; | ||
328 | } __attribute__ ((packed)); | ||
329 | |||
330 | /* This stores all control uplink flags */ | ||
331 | struct ctrl_ul { | ||
332 | u8 port; | ||
333 | unsigned reserved:6; | ||
334 | unsigned RTS:1; | ||
335 | unsigned DTR:1; | ||
336 | } __attribute__ ((packed)); | ||
337 | |||
338 | #else | ||
339 | /* Little endian */ | ||
340 | |||
341 | /* This represents the toggle information */ | ||
342 | struct toggles { | ||
343 | unsigned mdm_ul:1; | ||
344 | unsigned mdm_dl:1; | ||
345 | unsigned diag_dl:1; | ||
346 | unsigned enabled:5; /* | ||
347 | * Toggle fields are valid if enabled is 0, | ||
348 | * else A-channels must always be used. | ||
349 | */ | ||
350 | } __attribute__ ((packed)); | ||
351 | |||
352 | /* Configuration table to read at startup of card */ | ||
353 | struct config_table { | ||
354 | u32 signature; | ||
355 | u16 version; | ||
356 | u16 product_information; | ||
357 | struct toggles toggle; | ||
358 | u8 pad1[7]; | ||
359 | u16 dl_start; | ||
360 | u16 dl_mdm_len1; /* | ||
361 | * If this is 64, it can hold | ||
362 | * 60 bytes + 4 that is length field | ||
363 | */ | ||
364 | u16 dl_mdm_len2; | ||
365 | u16 dl_diag_len1; | ||
366 | u16 dl_diag_len2; | ||
367 | u16 dl_app1_len; | ||
368 | u16 dl_app2_len; | ||
369 | u16 dl_ctrl_len; | ||
370 | u8 pad2[16]; | ||
371 | u16 ul_start; | ||
372 | u16 ul_mdm_len2; | ||
373 | u16 ul_mdm_len1; | ||
374 | u16 ul_diag_len; | ||
375 | u16 ul_app1_len; | ||
376 | u16 ul_app2_len; | ||
377 | u16 ul_ctrl_len; | ||
378 | } __attribute__ ((packed)); | ||
379 | |||
380 | /* This stores all control downlink flags */ | ||
381 | struct ctrl_dl { | ||
382 | unsigned DSR:1; | ||
383 | unsigned DCD:1; | ||
384 | unsigned RI:1; | ||
385 | unsigned CTS:1; | ||
386 | unsigned reserverd:4; | ||
387 | u8 port; | ||
388 | } __attribute__ ((packed)); | ||
389 | |||
390 | /* This stores all control uplink flags */ | ||
391 | struct ctrl_ul { | ||
392 | unsigned DTR:1; | ||
393 | unsigned RTS:1; | ||
394 | unsigned reserved:6; | ||
395 | u8 port; | ||
396 | } __attribute__ ((packed)); | ||
397 | #endif | ||
398 | |||
399 | /* This holds all information that is needed regarding a port */ | ||
400 | struct port { | ||
401 | u8 update_flow_control; | ||
402 | struct ctrl_ul ctrl_ul; | ||
403 | struct ctrl_dl ctrl_dl; | ||
404 | struct kfifo *fifo_ul; | ||
405 | void __iomem *dl_addr[2]; | ||
406 | u32 dl_size[2]; | ||
407 | u8 toggle_dl; | ||
408 | void __iomem *ul_addr[2]; | ||
409 | u32 ul_size[2]; | ||
410 | u8 toggle_ul; | ||
411 | u16 token_dl; | ||
412 | |||
413 | struct tty_struct *tty; | ||
414 | int tty_open_count; | ||
415 | /* mutex to ensure one access patch to this port */ | ||
416 | struct mutex tty_sem; | ||
417 | wait_queue_head_t tty_wait; | ||
418 | struct async_icount tty_icount; | ||
419 | }; | ||
420 | |||
421 | /* Private data one for each card in the system */ | ||
422 | struct nozomi { | ||
423 | void __iomem *base_addr; | ||
424 | unsigned long flip; | ||
425 | |||
426 | /* Pointers to registers */ | ||
427 | void __iomem *reg_iir; | ||
428 | void __iomem *reg_fcr; | ||
429 | void __iomem *reg_ier; | ||
430 | |||
431 | u16 last_ier; | ||
432 | enum card_type card_type; | ||
433 | struct config_table config_table; /* Configuration table */ | ||
434 | struct pci_dev *pdev; | ||
435 | struct port port[NOZOMI_MAX_PORTS]; | ||
436 | u8 *send_buf; | ||
437 | |||
438 | spinlock_t spin_mutex; /* secures access to registers and tty */ | ||
439 | |||
440 | unsigned int index_start; | ||
441 | u32 open_ttys; | ||
442 | }; | ||
443 | |||
444 | /* This is a data packet that is read or written to/from card */ | ||
445 | struct buffer { | ||
446 | u32 size; /* size is the length of the data buffer */ | ||
447 | u8 *data; | ||
448 | } __attribute__ ((packed)); | ||
449 | |||
450 | /* Global variables */ | ||
451 | static struct pci_device_id nozomi_pci_tbl[] = { | ||
452 | {PCI_DEVICE(VENDOR1, DEVICE1)}, | ||
453 | {}, | ||
454 | }; | ||
455 | |||
456 | MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl); | ||
457 | |||
458 | static struct nozomi *ndevs[NOZOMI_MAX_CARDS]; | ||
459 | static struct tty_driver *ntty_driver; | ||
460 | |||
461 | /* | ||
462 | * find card by tty_index | ||
463 | */ | ||
464 | static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty) | ||
465 | { | ||
466 | return tty ? ndevs[tty->index / MAX_PORT] : NULL; | ||
467 | } | ||
468 | |||
469 | static inline struct port *get_port_by_tty(const struct tty_struct *tty) | ||
470 | { | ||
471 | struct nozomi *ndev = get_dc_by_tty(tty); | ||
472 | return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL; | ||
473 | } | ||
474 | |||
475 | /* | ||
476 | * TODO: | ||
477 | * -Optimize | ||
478 | * -Rewrite cleaner | ||
479 | */ | ||
480 | |||
481 | static void read_mem32(u32 *buf, const void __iomem *mem_addr_start, | ||
482 | u32 size_bytes) | ||
483 | { | ||
484 | u32 i = 0; | ||
485 | const u32 *ptr = (__force u32 *) mem_addr_start; | ||
486 | u16 *buf16; | ||
487 | |||
488 | if (unlikely(!ptr || !buf)) | ||
489 | goto out; | ||
490 | |||
491 | /* shortcut for extremely often used cases */ | ||
492 | switch (size_bytes) { | ||
493 | case 2: /* 2 bytes */ | ||
494 | buf16 = (u16 *) buf; | ||
495 | *buf16 = __le16_to_cpu(readw((void __iomem *)ptr)); | ||
496 | goto out; | ||
497 | break; | ||
498 | case 4: /* 4 bytes */ | ||
499 | *(buf) = __le32_to_cpu(readl((void __iomem *)ptr)); | ||
500 | goto out; | ||
501 | break; | ||
502 | } | ||
503 | |||
504 | while (i < size_bytes) { | ||
505 | if (size_bytes - i == 2) { | ||
506 | /* Handle 2 bytes in the end */ | ||
507 | buf16 = (u16 *) buf; | ||
508 | *(buf16) = __le16_to_cpu(readw((void __iomem *)ptr)); | ||
509 | i += 2; | ||
510 | } else { | ||
511 | /* Read 4 bytes */ | ||
512 | *(buf) = __le32_to_cpu(readl((void __iomem *)ptr)); | ||
513 | i += 4; | ||
514 | } | ||
515 | buf++; | ||
516 | ptr++; | ||
517 | } | ||
518 | out: | ||
519 | return; | ||
520 | } | ||
521 | |||
522 | /* | ||
523 | * TODO: | ||
524 | * -Optimize | ||
525 | * -Rewrite cleaner | ||
526 | */ | ||
527 | static u32 write_mem32(void __iomem *mem_addr_start, u32 *buf, | ||
528 | u32 size_bytes) | ||
529 | { | ||
530 | u32 i = 0; | ||
531 | u32 *ptr = (__force u32 *) mem_addr_start; | ||
532 | u16 *buf16; | ||
533 | |||
534 | if (unlikely(!ptr || !buf)) | ||
535 | return 0; | ||
536 | |||
537 | /* shortcut for extremely often used cases */ | ||
538 | switch (size_bytes) { | ||
539 | case 2: /* 2 bytes */ | ||
540 | buf16 = (u16 *) buf; | ||
541 | writew(__cpu_to_le16(*buf16), (void __iomem *)ptr); | ||
542 | return 2; | ||
543 | break; | ||
544 | case 1: /* | ||
545 | * also needs to write 4 bytes in this case | ||
546 | * so falling through.. | ||
547 | */ | ||
548 | case 4: /* 4 bytes */ | ||
549 | writel(__cpu_to_le32(*buf), (void __iomem *)ptr); | ||
550 | return 4; | ||
551 | break; | ||
552 | } | ||
553 | |||
554 | while (i < size_bytes) { | ||
555 | if (size_bytes - i == 2) { | ||
556 | /* 2 bytes */ | ||
557 | buf16 = (u16 *) buf; | ||
558 | writew(__cpu_to_le16(*buf16), (void __iomem *)ptr); | ||
559 | i += 2; | ||
560 | } else { | ||
561 | /* 4 bytes */ | ||
562 | writel(__cpu_to_le32(*buf), (void __iomem *)ptr); | ||
563 | i += 4; | ||
564 | } | ||
565 | buf++; | ||
566 | ptr++; | ||
567 | } | ||
568 | return i; | ||
569 | } | ||
570 | |||
571 | /* Setup pointers to different channels and also setup buffer sizes. */ | ||
572 | static void setup_memory(struct nozomi *dc) | ||
573 | { | ||
574 | void __iomem *offset = dc->base_addr + dc->config_table.dl_start; | ||
575 | /* The length reported is including the length field of 4 bytes, | ||
576 | * hence subtract with 4. | ||
577 | */ | ||
578 | const u16 buff_offset = 4; | ||
579 | |||
580 | /* Modem port dl configuration */ | ||
581 | dc->port[PORT_MDM].dl_addr[CH_A] = offset; | ||
582 | dc->port[PORT_MDM].dl_addr[CH_B] = | ||
583 | (offset += dc->config_table.dl_mdm_len1); | ||
584 | dc->port[PORT_MDM].dl_size[CH_A] = | ||
585 | dc->config_table.dl_mdm_len1 - buff_offset; | ||
586 | dc->port[PORT_MDM].dl_size[CH_B] = | ||
587 | dc->config_table.dl_mdm_len2 - buff_offset; | ||
588 | |||
589 | /* Diag port dl configuration */ | ||
590 | dc->port[PORT_DIAG].dl_addr[CH_A] = | ||
591 | (offset += dc->config_table.dl_mdm_len2); | ||
592 | dc->port[PORT_DIAG].dl_size[CH_A] = | ||
593 | dc->config_table.dl_diag_len1 - buff_offset; | ||
594 | dc->port[PORT_DIAG].dl_addr[CH_B] = | ||
595 | (offset += dc->config_table.dl_diag_len1); | ||
596 | dc->port[PORT_DIAG].dl_size[CH_B] = | ||
597 | dc->config_table.dl_diag_len2 - buff_offset; | ||
598 | |||
599 | /* App1 port dl configuration */ | ||
600 | dc->port[PORT_APP1].dl_addr[CH_A] = | ||
601 | (offset += dc->config_table.dl_diag_len2); | ||
602 | dc->port[PORT_APP1].dl_size[CH_A] = | ||
603 | dc->config_table.dl_app1_len - buff_offset; | ||
604 | |||
605 | /* App2 port dl configuration */ | ||
606 | dc->port[PORT_APP2].dl_addr[CH_A] = | ||
607 | (offset += dc->config_table.dl_app1_len); | ||
608 | dc->port[PORT_APP2].dl_size[CH_A] = | ||
609 | dc->config_table.dl_app2_len - buff_offset; | ||
610 | |||
611 | /* Ctrl dl configuration */ | ||
612 | dc->port[PORT_CTRL].dl_addr[CH_A] = | ||
613 | (offset += dc->config_table.dl_app2_len); | ||
614 | dc->port[PORT_CTRL].dl_size[CH_A] = | ||
615 | dc->config_table.dl_ctrl_len - buff_offset; | ||
616 | |||
617 | offset = dc->base_addr + dc->config_table.ul_start; | ||
618 | |||
619 | /* Modem Port ul configuration */ | ||
620 | dc->port[PORT_MDM].ul_addr[CH_A] = offset; | ||
621 | dc->port[PORT_MDM].ul_size[CH_A] = | ||
622 | dc->config_table.ul_mdm_len1 - buff_offset; | ||
623 | dc->port[PORT_MDM].ul_addr[CH_B] = | ||
624 | (offset += dc->config_table.ul_mdm_len1); | ||
625 | dc->port[PORT_MDM].ul_size[CH_B] = | ||
626 | dc->config_table.ul_mdm_len2 - buff_offset; | ||
627 | |||
628 | /* Diag port ul configuration */ | ||
629 | dc->port[PORT_DIAG].ul_addr[CH_A] = | ||
630 | (offset += dc->config_table.ul_mdm_len2); | ||
631 | dc->port[PORT_DIAG].ul_size[CH_A] = | ||
632 | dc->config_table.ul_diag_len - buff_offset; | ||
633 | |||
634 | /* App1 port ul configuration */ | ||
635 | dc->port[PORT_APP1].ul_addr[CH_A] = | ||
636 | (offset += dc->config_table.ul_diag_len); | ||
637 | dc->port[PORT_APP1].ul_size[CH_A] = | ||
638 | dc->config_table.ul_app1_len - buff_offset; | ||
639 | |||
640 | /* App2 port ul configuration */ | ||
641 | dc->port[PORT_APP2].ul_addr[CH_A] = | ||
642 | (offset += dc->config_table.ul_app1_len); | ||
643 | dc->port[PORT_APP2].ul_size[CH_A] = | ||
644 | dc->config_table.ul_app2_len - buff_offset; | ||
645 | |||
646 | /* Ctrl ul configuration */ | ||
647 | dc->port[PORT_CTRL].ul_addr[CH_A] = | ||
648 | (offset += dc->config_table.ul_app2_len); | ||
649 | dc->port[PORT_CTRL].ul_size[CH_A] = | ||
650 | dc->config_table.ul_ctrl_len - buff_offset; | ||
651 | } | ||
652 | |||
653 | /* Dump config table under initalization phase */ | ||
654 | #ifdef DEBUG | ||
655 | static void dump_table(const struct nozomi *dc) | ||
656 | { | ||
657 | DBG3("signature: 0x%08X", dc->config_table.signature); | ||
658 | DBG3("version: 0x%04X", dc->config_table.version); | ||
659 | DBG3("product_information: 0x%04X", \ | ||
660 | dc->config_table.product_information); | ||
661 | DBG3("toggle enabled: %d", dc->config_table.toggle.enabled); | ||
662 | DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul); | ||
663 | DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl); | ||
664 | DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl); | ||
665 | |||
666 | DBG3("dl_start: 0x%04X", dc->config_table.dl_start); | ||
667 | DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1, | ||
668 | dc->config_table.dl_mdm_len1); | ||
669 | DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2, | ||
670 | dc->config_table.dl_mdm_len2); | ||
671 | DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1, | ||
672 | dc->config_table.dl_diag_len1); | ||
673 | DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2, | ||
674 | dc->config_table.dl_diag_len2); | ||
675 | DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len, | ||
676 | dc->config_table.dl_app1_len); | ||
677 | DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len, | ||
678 | dc->config_table.dl_app2_len); | ||
679 | DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len, | ||
680 | dc->config_table.dl_ctrl_len); | ||
681 | DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start, | ||
682 | dc->config_table.ul_start); | ||
683 | DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1, | ||
684 | dc->config_table.ul_mdm_len1); | ||
685 | DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2, | ||
686 | dc->config_table.ul_mdm_len2); | ||
687 | DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len, | ||
688 | dc->config_table.ul_diag_len); | ||
689 | DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len, | ||
690 | dc->config_table.ul_app1_len); | ||
691 | DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len, | ||
692 | dc->config_table.ul_app2_len); | ||
693 | DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len, | ||
694 | dc->config_table.ul_ctrl_len); | ||
695 | } | ||
696 | #else | ||
697 | static __inline__ void dump_table(const struct nozomi *dc) { } | ||
698 | #endif | ||
699 | |||
700 | /* | ||
701 | * Read configuration table from card under intalization phase | ||
702 | * Returns 1 if ok, else 0 | ||
703 | */ | ||
704 | static int nozomi_read_config_table(struct nozomi *dc) | ||
705 | { | ||
706 | read_mem32((u32 *) &dc->config_table, dc->base_addr + 0, | ||
707 | sizeof(struct config_table)); | ||
708 | |||
709 | if (dc->config_table.signature != CONFIG_MAGIC) { | ||
710 | dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n", | ||
711 | dc->config_table.signature, CONFIG_MAGIC); | ||
712 | return 0; | ||
713 | } | ||
714 | |||
715 | if ((dc->config_table.version == 0) | ||
716 | || (dc->config_table.toggle.enabled == TOGGLE_VALID)) { | ||
717 | int i; | ||
718 | DBG1("Second phase, configuring card"); | ||
719 | |||
720 | setup_memory(dc); | ||
721 | |||
722 | dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul; | ||
723 | dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl; | ||
724 | dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl; | ||
725 | DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d", | ||
726 | dc->port[PORT_MDM].toggle_ul, | ||
727 | dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl); | ||
728 | |||
729 | dump_table(dc); | ||
730 | |||
731 | for (i = PORT_MDM; i < MAX_PORT; i++) { | ||
732 | dc->port[i].fifo_ul = | ||
733 | kfifo_alloc(FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL); | ||
734 | memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl)); | ||
735 | memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul)); | ||
736 | } | ||
737 | |||
738 | /* Enable control channel */ | ||
739 | dc->last_ier = dc->last_ier | CTRL_DL; | ||
740 | writew(dc->last_ier, dc->reg_ier); | ||
741 | |||
742 | dev_info(&dc->pdev->dev, "Initialization OK!\n"); | ||
743 | return 1; | ||
744 | } | ||
745 | |||
746 | if ((dc->config_table.version > 0) | ||
747 | && (dc->config_table.toggle.enabled != TOGGLE_VALID)) { | ||
748 | u32 offset = 0; | ||
749 | DBG1("First phase: pushing upload buffers, clearing download"); | ||
750 | |||
751 | dev_info(&dc->pdev->dev, "Version of card: %d\n", | ||
752 | dc->config_table.version); | ||
753 | |||
754 | /* Here we should disable all I/O over F32. */ | ||
755 | setup_memory(dc); | ||
756 | |||
757 | /* | ||
758 | * We should send ALL channel pair tokens back along | ||
759 | * with reset token | ||
760 | */ | ||
761 | |||
762 | /* push upload modem buffers */ | ||
763 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_A], | ||
764 | (u32 *) &offset, 4); | ||
765 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_B], | ||
766 | (u32 *) &offset, 4); | ||
767 | |||
768 | writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr); | ||
769 | |||
770 | DBG1("First phase done"); | ||
771 | } | ||
772 | |||
773 | return 1; | ||
774 | } | ||
775 | |||
776 | /* Enable uplink interrupts */ | ||
777 | static void enable_transmit_ul(enum port_type port, struct nozomi *dc) | ||
778 | { | ||
779 | u16 mask[NOZOMI_MAX_PORTS] = \ | ||
780 | {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL}; | ||
781 | |||
782 | if (port < NOZOMI_MAX_PORTS) { | ||
783 | dc->last_ier |= mask[port]; | ||
784 | writew(dc->last_ier, dc->reg_ier); | ||
785 | } else { | ||
786 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | ||
787 | } | ||
788 | } | ||
789 | |||
790 | /* Disable uplink interrupts */ | ||
791 | static void disable_transmit_ul(enum port_type port, struct nozomi *dc) | ||
792 | { | ||
793 | u16 mask[NOZOMI_MAX_PORTS] = \ | ||
794 | {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL}; | ||
795 | |||
796 | if (port < NOZOMI_MAX_PORTS) { | ||
797 | dc->last_ier &= mask[port]; | ||
798 | writew(dc->last_ier, dc->reg_ier); | ||
799 | } else { | ||
800 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | ||
801 | } | ||
802 | } | ||
803 | |||
804 | /* Enable downlink interrupts */ | ||
805 | static void enable_transmit_dl(enum port_type port, struct nozomi *dc) | ||
806 | { | ||
807 | u16 mask[NOZOMI_MAX_PORTS] = \ | ||
808 | {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL}; | ||
809 | |||
810 | if (port < NOZOMI_MAX_PORTS) { | ||
811 | dc->last_ier |= mask[port]; | ||
812 | writew(dc->last_ier, dc->reg_ier); | ||
813 | } else { | ||
814 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | ||
815 | } | ||
816 | } | ||
817 | |||
818 | /* Disable downlink interrupts */ | ||
819 | static void disable_transmit_dl(enum port_type port, struct nozomi *dc) | ||
820 | { | ||
821 | u16 mask[NOZOMI_MAX_PORTS] = \ | ||
822 | {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL}; | ||
823 | |||
824 | if (port < NOZOMI_MAX_PORTS) { | ||
825 | dc->last_ier &= mask[port]; | ||
826 | writew(dc->last_ier, dc->reg_ier); | ||
827 | } else { | ||
828 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | ||
829 | } | ||
830 | } | ||
831 | |||
832 | /* | ||
833 | * Return 1 - send buffer to card and ack. | ||
834 | * Return 0 - don't ack, don't send buffer to card. | ||
835 | */ | ||
836 | static int send_data(enum port_type index, struct nozomi *dc) | ||
837 | { | ||
838 | u32 size = 0; | ||
839 | struct port *port = &dc->port[index]; | ||
840 | u8 toggle = port->toggle_ul; | ||
841 | void __iomem *addr = port->ul_addr[toggle]; | ||
842 | u32 ul_size = port->ul_size[toggle]; | ||
843 | struct tty_struct *tty = port->tty; | ||
844 | |||
845 | /* Get data from tty and place in buf for now */ | ||
846 | size = __kfifo_get(port->fifo_ul, dc->send_buf, | ||
847 | ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX); | ||
848 | |||
849 | if (size == 0) { | ||
850 | DBG4("No more data to send, disable link:"); | ||
851 | return 0; | ||
852 | } | ||
853 | |||
854 | /* DUMP(buf, size); */ | ||
855 | |||
856 | /* Write length + data */ | ||
857 | write_mem32(addr, (u32 *) &size, 4); | ||
858 | write_mem32(addr + 4, (u32 *) dc->send_buf, size); | ||
859 | |||
860 | if (tty) | ||
861 | tty_wakeup(tty); | ||
862 | |||
863 | return 1; | ||
864 | } | ||
865 | |||
866 | /* If all data has been read, return 1, else 0 */ | ||
867 | static int receive_data(enum port_type index, struct nozomi *dc) | ||
868 | { | ||
869 | u8 buf[RECEIVE_BUF_MAX] = { 0 }; | ||
870 | int size; | ||
871 | u32 offset = 4; | ||
872 | struct port *port = &dc->port[index]; | ||
873 | void __iomem *addr = port->dl_addr[port->toggle_dl]; | ||
874 | struct tty_struct *tty = port->tty; | ||
875 | int i; | ||
876 | |||
877 | if (unlikely(!tty)) { | ||
878 | DBG1("tty not open for port: %d?", index); | ||
879 | return 1; | ||
880 | } | ||
881 | |||
882 | read_mem32((u32 *) &size, addr, 4); | ||
883 | /* DBG1( "%d bytes port: %d", size, index); */ | ||
884 | |||
885 | if (test_bit(TTY_THROTTLED, &tty->flags)) { | ||
886 | DBG1("No room in tty, don't read data, don't ack interrupt, " | ||
887 | "disable interrupt"); | ||
888 | |||
889 | /* disable interrupt in downlink... */ | ||
890 | disable_transmit_dl(index, dc); | ||
891 | return 0; | ||
892 | } | ||
893 | |||
894 | if (unlikely(size == 0)) { | ||
895 | dev_err(&dc->pdev->dev, "size == 0?\n"); | ||
896 | return 1; | ||
897 | } | ||
898 | |||
899 | tty_buffer_request_room(tty, size); | ||
900 | |||
901 | while (size > 0) { | ||
902 | read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX); | ||
903 | |||
904 | if (size == 1) { | ||
905 | tty_insert_flip_char(tty, buf[0], TTY_NORMAL); | ||
906 | size = 0; | ||
907 | } else if (size < RECEIVE_BUF_MAX) { | ||
908 | size -= tty_insert_flip_string(tty, (char *) buf, size); | ||
909 | } else { | ||
910 | i = tty_insert_flip_string(tty, \ | ||
911 | (char *) buf, RECEIVE_BUF_MAX); | ||
912 | size -= i; | ||
913 | offset += i; | ||
914 | } | ||
915 | } | ||
916 | |||
917 | set_bit(index, &dc->flip); | ||
918 | |||
919 | return 1; | ||
920 | } | ||
921 | |||
922 | /* Debug for interrupts */ | ||
923 | #ifdef DEBUG | ||
924 | static char *interrupt2str(u16 interrupt) | ||
925 | { | ||
926 | static char buf[TMP_BUF_MAX]; | ||
927 | char *p = buf; | ||
928 | |||
929 | interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL; | ||
930 | interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
931 | "MDM_DL2 ") : NULL; | ||
932 | |||
933 | interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
934 | "MDM_UL1 ") : NULL; | ||
935 | interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
936 | "MDM_UL2 ") : NULL; | ||
937 | |||
938 | interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
939 | "DIAG_DL1 ") : NULL; | ||
940 | interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
941 | "DIAG_DL2 ") : NULL; | ||
942 | |||
943 | interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
944 | "DIAG_UL ") : NULL; | ||
945 | |||
946 | interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
947 | "APP1_DL ") : NULL; | ||
948 | interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
949 | "APP2_DL ") : NULL; | ||
950 | |||
951 | interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
952 | "APP1_UL ") : NULL; | ||
953 | interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
954 | "APP2_UL ") : NULL; | ||
955 | |||
956 | interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
957 | "CTRL_DL ") : NULL; | ||
958 | interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
959 | "CTRL_UL ") : NULL; | ||
960 | |||
961 | interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | ||
962 | "RESET ") : NULL; | ||
963 | |||
964 | return buf; | ||
965 | } | ||
966 | #endif | ||
967 | |||
968 | /* | ||
969 | * Receive flow control | ||
970 | * Return 1 - If ok, else 0 | ||
971 | */ | ||
972 | static int receive_flow_control(struct nozomi *dc) | ||
973 | { | ||
974 | enum port_type port = PORT_MDM; | ||
975 | struct ctrl_dl ctrl_dl; | ||
976 | struct ctrl_dl old_ctrl; | ||
977 | u16 enable_ier = 0; | ||
978 | |||
979 | read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2); | ||
980 | |||
981 | switch (ctrl_dl.port) { | ||
982 | case CTRL_CMD: | ||
983 | DBG1("The Base Band sends this value as a response to a " | ||
984 | "request for IMSI detach sent over the control " | ||
985 | "channel uplink (see section 7.6.1)."); | ||
986 | break; | ||
987 | case CTRL_MDM: | ||
988 | port = PORT_MDM; | ||
989 | enable_ier = MDM_DL; | ||
990 | break; | ||
991 | case CTRL_DIAG: | ||
992 | port = PORT_DIAG; | ||
993 | enable_ier = DIAG_DL; | ||
994 | break; | ||
995 | case CTRL_APP1: | ||
996 | port = PORT_APP1; | ||
997 | enable_ier = APP1_DL; | ||
998 | break; | ||
999 | case CTRL_APP2: | ||
1000 | port = PORT_APP2; | ||
1001 | enable_ier = APP2_DL; | ||
1002 | break; | ||
1003 | default: | ||
1004 | dev_err(&dc->pdev->dev, | ||
1005 | "ERROR: flow control received for non-existing port\n"); | ||
1006 | return 0; | ||
1007 | }; | ||
1008 | |||
1009 | DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl), | ||
1010 | *((u16 *)&ctrl_dl)); | ||
1011 | |||
1012 | old_ctrl = dc->port[port].ctrl_dl; | ||
1013 | dc->port[port].ctrl_dl = ctrl_dl; | ||
1014 | |||
1015 | if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) { | ||
1016 | DBG1("Disable interrupt (0x%04X) on port: %d", | ||
1017 | enable_ier, port); | ||
1018 | disable_transmit_ul(port, dc); | ||
1019 | |||
1020 | } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) { | ||
1021 | |||
1022 | if (__kfifo_len(dc->port[port].fifo_ul)) { | ||
1023 | DBG1("Enable interrupt (0x%04X) on port: %d", | ||
1024 | enable_ier, port); | ||
1025 | DBG1("Data in buffer [%d], enable transmit! ", | ||
1026 | __kfifo_len(dc->port[port].fifo_ul)); | ||
1027 | enable_transmit_ul(port, dc); | ||
1028 | } else { | ||
1029 | DBG1("No data in buffer..."); | ||
1030 | } | ||
1031 | } | ||
1032 | |||
1033 | if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) { | ||
1034 | DBG1(" No change in mctrl"); | ||
1035 | return 1; | ||
1036 | } | ||
1037 | /* Update statistics */ | ||
1038 | if (old_ctrl.CTS != ctrl_dl.CTS) | ||
1039 | dc->port[port].tty_icount.cts++; | ||
1040 | if (old_ctrl.DSR != ctrl_dl.DSR) | ||
1041 | dc->port[port].tty_icount.dsr++; | ||
1042 | if (old_ctrl.RI != ctrl_dl.RI) | ||
1043 | dc->port[port].tty_icount.rng++; | ||
1044 | if (old_ctrl.DCD != ctrl_dl.DCD) | ||
1045 | dc->port[port].tty_icount.dcd++; | ||
1046 | |||
1047 | wake_up_interruptible(&dc->port[port].tty_wait); | ||
1048 | |||
1049 | DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)", | ||
1050 | port, | ||
1051 | dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts, | ||
1052 | dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr); | ||
1053 | |||
1054 | return 1; | ||
1055 | } | ||
1056 | |||
1057 | static enum ctrl_port_type port2ctrl(enum port_type port, | ||
1058 | const struct nozomi *dc) | ||
1059 | { | ||
1060 | switch (port) { | ||
1061 | case PORT_MDM: | ||
1062 | return CTRL_MDM; | ||
1063 | case PORT_DIAG: | ||
1064 | return CTRL_DIAG; | ||
1065 | case PORT_APP1: | ||
1066 | return CTRL_APP1; | ||
1067 | case PORT_APP2: | ||
1068 | return CTRL_APP2; | ||
1069 | default: | ||
1070 | dev_err(&dc->pdev->dev, | ||
1071 | "ERROR: send flow control " \ | ||
1072 | "received for non-existing port\n"); | ||
1073 | }; | ||
1074 | return CTRL_ERROR; | ||
1075 | } | ||
1076 | |||
1077 | /* | ||
1078 | * Send flow control, can only update one channel at a time | ||
1079 | * Return 0 - If we have updated all flow control | ||
1080 | * Return 1 - If we need to update more flow control, ack current enable more | ||
1081 | */ | ||
1082 | static int send_flow_control(struct nozomi *dc) | ||
1083 | { | ||
1084 | u32 i, more_flow_control_to_be_updated = 0; | ||
1085 | u16 *ctrl; | ||
1086 | |||
1087 | for (i = PORT_MDM; i < MAX_PORT; i++) { | ||
1088 | if (dc->port[i].update_flow_control) { | ||
1089 | if (more_flow_control_to_be_updated) { | ||
1090 | /* We have more flow control to be updated */ | ||
1091 | return 1; | ||
1092 | } | ||
1093 | dc->port[i].ctrl_ul.port = port2ctrl(i, dc); | ||
1094 | ctrl = (u16 *)&dc->port[i].ctrl_ul; | ||
1095 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], \ | ||
1096 | (u32 *) ctrl, 2); | ||
1097 | dc->port[i].update_flow_control = 0; | ||
1098 | more_flow_control_to_be_updated = 1; | ||
1099 | } | ||
1100 | } | ||
1101 | return 0; | ||
1102 | } | ||
1103 | |||
1104 | /* | ||
1105 | * Handle donlink data, ports that are handled are modem and diagnostics | ||
1106 | * Return 1 - ok | ||
1107 | * Return 0 - toggle fields are out of sync | ||
1108 | */ | ||
1109 | static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle, | ||
1110 | u16 read_iir, u16 mask1, u16 mask2) | ||
1111 | { | ||
1112 | if (*toggle == 0 && read_iir & mask1) { | ||
1113 | if (receive_data(port, dc)) { | ||
1114 | writew(mask1, dc->reg_fcr); | ||
1115 | *toggle = !(*toggle); | ||
1116 | } | ||
1117 | |||
1118 | if (read_iir & mask2) { | ||
1119 | if (receive_data(port, dc)) { | ||
1120 | writew(mask2, dc->reg_fcr); | ||
1121 | *toggle = !(*toggle); | ||
1122 | } | ||
1123 | } | ||
1124 | } else if (*toggle == 1 && read_iir & mask2) { | ||
1125 | if (receive_data(port, dc)) { | ||
1126 | writew(mask2, dc->reg_fcr); | ||
1127 | *toggle = !(*toggle); | ||
1128 | } | ||
1129 | |||
1130 | if (read_iir & mask1) { | ||
1131 | if (receive_data(port, dc)) { | ||
1132 | writew(mask1, dc->reg_fcr); | ||
1133 | *toggle = !(*toggle); | ||
1134 | } | ||
1135 | } | ||
1136 | } else { | ||
1137 | dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n", | ||
1138 | *toggle); | ||
1139 | return 0; | ||
1140 | } | ||
1141 | return 1; | ||
1142 | } | ||
1143 | |||
1144 | /* | ||
1145 | * Handle uplink data, this is currently for the modem port | ||
1146 | * Return 1 - ok | ||
1147 | * Return 0 - toggle field are out of sync | ||
1148 | */ | ||
1149 | static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir) | ||
1150 | { | ||
1151 | u8 *toggle = &(dc->port[port].toggle_ul); | ||
1152 | |||
1153 | if (*toggle == 0 && read_iir & MDM_UL1) { | ||
1154 | dc->last_ier &= ~MDM_UL; | ||
1155 | writew(dc->last_ier, dc->reg_ier); | ||
1156 | if (send_data(port, dc)) { | ||
1157 | writew(MDM_UL1, dc->reg_fcr); | ||
1158 | dc->last_ier = dc->last_ier | MDM_UL; | ||
1159 | writew(dc->last_ier, dc->reg_ier); | ||
1160 | *toggle = !*toggle; | ||
1161 | } | ||
1162 | |||
1163 | if (read_iir & MDM_UL2) { | ||
1164 | dc->last_ier &= ~MDM_UL; | ||
1165 | writew(dc->last_ier, dc->reg_ier); | ||
1166 | if (send_data(port, dc)) { | ||
1167 | writew(MDM_UL2, dc->reg_fcr); | ||
1168 | dc->last_ier = dc->last_ier | MDM_UL; | ||
1169 | writew(dc->last_ier, dc->reg_ier); | ||
1170 | *toggle = !*toggle; | ||
1171 | } | ||
1172 | } | ||
1173 | |||
1174 | } else if (*toggle == 1 && read_iir & MDM_UL2) { | ||
1175 | dc->last_ier &= ~MDM_UL; | ||
1176 | writew(dc->last_ier, dc->reg_ier); | ||
1177 | if (send_data(port, dc)) { | ||
1178 | writew(MDM_UL2, dc->reg_fcr); | ||
1179 | dc->last_ier = dc->last_ier | MDM_UL; | ||
1180 | writew(dc->last_ier, dc->reg_ier); | ||
1181 | *toggle = !*toggle; | ||
1182 | } | ||
1183 | |||
1184 | if (read_iir & MDM_UL1) { | ||
1185 | dc->last_ier &= ~MDM_UL; | ||
1186 | writew(dc->last_ier, dc->reg_ier); | ||
1187 | if (send_data(port, dc)) { | ||
1188 | writew(MDM_UL1, dc->reg_fcr); | ||
1189 | dc->last_ier = dc->last_ier | MDM_UL; | ||
1190 | writew(dc->last_ier, dc->reg_ier); | ||
1191 | *toggle = !*toggle; | ||
1192 | } | ||
1193 | } | ||
1194 | } else { | ||
1195 | writew(read_iir & MDM_UL, dc->reg_fcr); | ||
1196 | dev_err(&dc->pdev->dev, "port out of sync!\n"); | ||
1197 | return 0; | ||
1198 | } | ||
1199 | return 1; | ||
1200 | } | ||
1201 | |||
1202 | static irqreturn_t interrupt_handler(int irq, void *dev_id) | ||
1203 | { | ||
1204 | struct nozomi *dc = dev_id; | ||
1205 | unsigned int a; | ||
1206 | u16 read_iir; | ||
1207 | |||
1208 | if (!dc) | ||
1209 | return IRQ_NONE; | ||
1210 | |||
1211 | spin_lock(&dc->spin_mutex); | ||
1212 | read_iir = readw(dc->reg_iir); | ||
1213 | |||
1214 | /* Card removed */ | ||
1215 | if (read_iir == (u16)-1) | ||
1216 | goto none; | ||
1217 | /* | ||
1218 | * Just handle interrupt enabled in IER | ||
1219 | * (by masking with dc->last_ier) | ||
1220 | */ | ||
1221 | read_iir &= dc->last_ier; | ||
1222 | |||
1223 | if (read_iir == 0) | ||
1224 | goto none; | ||
1225 | |||
1226 | |||
1227 | DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir, | ||
1228 | dc->last_ier); | ||
1229 | |||
1230 | if (read_iir & RESET) { | ||
1231 | if (unlikely(!nozomi_read_config_table(dc))) { | ||
1232 | dc->last_ier = 0x0; | ||
1233 | writew(dc->last_ier, dc->reg_ier); | ||
1234 | dev_err(&dc->pdev->dev, "Could not read status from " | ||
1235 | "card, we should disable interface\n"); | ||
1236 | } else { | ||
1237 | writew(RESET, dc->reg_fcr); | ||
1238 | } | ||
1239 | /* No more useful info if this was the reset interrupt. */ | ||
1240 | goto exit_handler; | ||
1241 | } | ||
1242 | if (read_iir & CTRL_UL) { | ||
1243 | DBG1("CTRL_UL"); | ||
1244 | dc->last_ier &= ~CTRL_UL; | ||
1245 | writew(dc->last_ier, dc->reg_ier); | ||
1246 | if (send_flow_control(dc)) { | ||
1247 | writew(CTRL_UL, dc->reg_fcr); | ||
1248 | dc->last_ier = dc->last_ier | CTRL_UL; | ||
1249 | writew(dc->last_ier, dc->reg_ier); | ||
1250 | } | ||
1251 | } | ||
1252 | if (read_iir & CTRL_DL) { | ||
1253 | receive_flow_control(dc); | ||
1254 | writew(CTRL_DL, dc->reg_fcr); | ||
1255 | } | ||
1256 | if (read_iir & MDM_DL) { | ||
1257 | if (!handle_data_dl(dc, PORT_MDM, | ||
1258 | &(dc->port[PORT_MDM].toggle_dl), read_iir, | ||
1259 | MDM_DL1, MDM_DL2)) { | ||
1260 | dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n"); | ||
1261 | goto exit_handler; | ||
1262 | } | ||
1263 | } | ||
1264 | if (read_iir & MDM_UL) { | ||
1265 | if (!handle_data_ul(dc, PORT_MDM, read_iir)) { | ||
1266 | dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n"); | ||
1267 | goto exit_handler; | ||
1268 | } | ||
1269 | } | ||
1270 | if (read_iir & DIAG_DL) { | ||
1271 | if (!handle_data_dl(dc, PORT_DIAG, | ||
1272 | &(dc->port[PORT_DIAG].toggle_dl), read_iir, | ||
1273 | DIAG_DL1, DIAG_DL2)) { | ||
1274 | dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n"); | ||
1275 | goto exit_handler; | ||
1276 | } | ||
1277 | } | ||
1278 | if (read_iir & DIAG_UL) { | ||
1279 | dc->last_ier &= ~DIAG_UL; | ||
1280 | writew(dc->last_ier, dc->reg_ier); | ||
1281 | if (send_data(PORT_DIAG, dc)) { | ||
1282 | writew(DIAG_UL, dc->reg_fcr); | ||
1283 | dc->last_ier = dc->last_ier | DIAG_UL; | ||
1284 | writew(dc->last_ier, dc->reg_ier); | ||
1285 | } | ||
1286 | } | ||
1287 | if (read_iir & APP1_DL) { | ||
1288 | if (receive_data(PORT_APP1, dc)) | ||
1289 | writew(APP1_DL, dc->reg_fcr); | ||
1290 | } | ||
1291 | if (read_iir & APP1_UL) { | ||
1292 | dc->last_ier &= ~APP1_UL; | ||
1293 | writew(dc->last_ier, dc->reg_ier); | ||
1294 | if (send_data(PORT_APP1, dc)) { | ||
1295 | writew(APP1_UL, dc->reg_fcr); | ||
1296 | dc->last_ier = dc->last_ier | APP1_UL; | ||
1297 | writew(dc->last_ier, dc->reg_ier); | ||
1298 | } | ||
1299 | } | ||
1300 | if (read_iir & APP2_DL) { | ||
1301 | if (receive_data(PORT_APP2, dc)) | ||
1302 | writew(APP2_DL, dc->reg_fcr); | ||
1303 | } | ||
1304 | if (read_iir & APP2_UL) { | ||
1305 | dc->last_ier &= ~APP2_UL; | ||
1306 | writew(dc->last_ier, dc->reg_ier); | ||
1307 | if (send_data(PORT_APP2, dc)) { | ||
1308 | writew(APP2_UL, dc->reg_fcr); | ||
1309 | dc->last_ier = dc->last_ier | APP2_UL; | ||
1310 | writew(dc->last_ier, dc->reg_ier); | ||
1311 | } | ||
1312 | } | ||
1313 | |||
1314 | exit_handler: | ||
1315 | spin_unlock(&dc->spin_mutex); | ||
1316 | for (a = 0; a < NOZOMI_MAX_PORTS; a++) | ||
1317 | if (test_and_clear_bit(a, &dc->flip)) | ||
1318 | tty_flip_buffer_push(dc->port[a].tty); | ||
1319 | return IRQ_HANDLED; | ||
1320 | none: | ||
1321 | spin_unlock(&dc->spin_mutex); | ||
1322 | return IRQ_NONE; | ||
1323 | } | ||
1324 | |||
1325 | static void nozomi_get_card_type(struct nozomi *dc) | ||
1326 | { | ||
1327 | int i; | ||
1328 | u32 size = 0; | ||
1329 | |||
1330 | for (i = 0; i < 6; i++) | ||
1331 | size += pci_resource_len(dc->pdev, i); | ||
1332 | |||
1333 | /* Assume card type F32_8 if no match */ | ||
1334 | dc->card_type = size == 2048 ? F32_2 : F32_8; | ||
1335 | |||
1336 | dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type); | ||
1337 | } | ||
1338 | |||
1339 | static void nozomi_setup_private_data(struct nozomi *dc) | ||
1340 | { | ||
1341 | void __iomem *offset = dc->base_addr + dc->card_type / 2; | ||
1342 | unsigned int i; | ||
1343 | |||
1344 | dc->reg_fcr = (void __iomem *)(offset + R_FCR); | ||
1345 | dc->reg_iir = (void __iomem *)(offset + R_IIR); | ||
1346 | dc->reg_ier = (void __iomem *)(offset + R_IER); | ||
1347 | dc->last_ier = 0; | ||
1348 | dc->flip = 0; | ||
1349 | |||
1350 | dc->port[PORT_MDM].token_dl = MDM_DL; | ||
1351 | dc->port[PORT_DIAG].token_dl = DIAG_DL; | ||
1352 | dc->port[PORT_APP1].token_dl = APP1_DL; | ||
1353 | dc->port[PORT_APP2].token_dl = APP2_DL; | ||
1354 | |||
1355 | for (i = 0; i < MAX_PORT; i++) | ||
1356 | init_waitqueue_head(&dc->port[i].tty_wait); | ||
1357 | } | ||
1358 | |||
1359 | static ssize_t card_type_show(struct device *dev, struct device_attribute *attr, | ||
1360 | char *buf) | ||
1361 | { | ||
1362 | struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); | ||
1363 | |||
1364 | return sprintf(buf, "%d\n", dc->card_type); | ||
1365 | } | ||
1366 | static DEVICE_ATTR(card_type, 0444, card_type_show, NULL); | ||
1367 | |||
1368 | static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr, | ||
1369 | char *buf) | ||
1370 | { | ||
1371 | struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); | ||
1372 | |||
1373 | return sprintf(buf, "%u\n", dc->open_ttys); | ||
1374 | } | ||
1375 | static DEVICE_ATTR(open_ttys, 0444, open_ttys_show, NULL); | ||
1376 | |||
1377 | static void make_sysfs_files(struct nozomi *dc) | ||
1378 | { | ||
1379 | if (device_create_file(&dc->pdev->dev, &dev_attr_card_type)) | ||
1380 | dev_err(&dc->pdev->dev, | ||
1381 | "Could not create sysfs file for card_type\n"); | ||
1382 | if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys)) | ||
1383 | dev_err(&dc->pdev->dev, | ||
1384 | "Could not create sysfs file for open_ttys\n"); | ||
1385 | } | ||
1386 | |||
1387 | static void remove_sysfs_files(struct nozomi *dc) | ||
1388 | { | ||
1389 | device_remove_file(&dc->pdev->dev, &dev_attr_card_type); | ||
1390 | device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys); | ||
1391 | } | ||
1392 | |||
1393 | /* Allocate memory for one device */ | ||
1394 | static int __devinit nozomi_card_init(struct pci_dev *pdev, | ||
1395 | const struct pci_device_id *ent) | ||
1396 | { | ||
1397 | resource_size_t start; | ||
1398 | int ret; | ||
1399 | struct nozomi *dc = NULL; | ||
1400 | int ndev_idx; | ||
1401 | int i; | ||
1402 | |||
1403 | dev_dbg(&pdev->dev, "Init, new card found\n"); | ||
1404 | |||
1405 | for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++) | ||
1406 | if (!ndevs[ndev_idx]) | ||
1407 | break; | ||
1408 | |||
1409 | if (ndev_idx >= ARRAY_SIZE(ndevs)) { | ||
1410 | dev_err(&pdev->dev, "no free tty range for this card left\n"); | ||
1411 | ret = -EIO; | ||
1412 | goto err; | ||
1413 | } | ||
1414 | |||
1415 | dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL); | ||
1416 | if (unlikely(!dc)) { | ||
1417 | dev_err(&pdev->dev, "Could not allocate memory\n"); | ||
1418 | ret = -ENOMEM; | ||
1419 | goto err_free; | ||
1420 | } | ||
1421 | |||
1422 | dc->pdev = pdev; | ||
1423 | |||
1424 | /* Find out what card type it is */ | ||
1425 | nozomi_get_card_type(dc); | ||
1426 | |||
1427 | ret = pci_enable_device(dc->pdev); | ||
1428 | if (ret) { | ||
1429 | dev_err(&pdev->dev, "Failed to enable PCI Device\n"); | ||
1430 | goto err_free; | ||
1431 | } | ||
1432 | |||
1433 | start = pci_resource_start(dc->pdev, 0); | ||
1434 | if (start == 0) { | ||
1435 | dev_err(&pdev->dev, "No I/O address for card detected\n"); | ||
1436 | ret = -ENODEV; | ||
1437 | goto err_disable_device; | ||
1438 | } | ||
1439 | |||
1440 | ret = pci_request_regions(dc->pdev, NOZOMI_NAME); | ||
1441 | if (ret) { | ||
1442 | dev_err(&pdev->dev, "I/O address 0x%04x already in use\n", | ||
1443 | (int) /* nozomi_private.io_addr */ 0); | ||
1444 | goto err_disable_device; | ||
1445 | } | ||
1446 | |||
1447 | dc->base_addr = ioremap(start, dc->card_type); | ||
1448 | if (!dc->base_addr) { | ||
1449 | dev_err(&pdev->dev, "Unable to map card MMIO\n"); | ||
1450 | ret = -ENODEV; | ||
1451 | goto err_rel_regs; | ||
1452 | } | ||
1453 | |||
1454 | dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL); | ||
1455 | if (!dc->send_buf) { | ||
1456 | dev_err(&pdev->dev, "Could not allocate send buffer?\n"); | ||
1457 | ret = -ENOMEM; | ||
1458 | goto err_free_sbuf; | ||
1459 | } | ||
1460 | |||
1461 | spin_lock_init(&dc->spin_mutex); | ||
1462 | |||
1463 | nozomi_setup_private_data(dc); | ||
1464 | |||
1465 | /* Disable all interrupts */ | ||
1466 | dc->last_ier = 0; | ||
1467 | writew(dc->last_ier, dc->reg_ier); | ||
1468 | |||
1469 | ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED, | ||
1470 | NOZOMI_NAME, dc); | ||
1471 | if (unlikely(ret)) { | ||
1472 | dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq); | ||
1473 | goto err_free_sbuf; | ||
1474 | } | ||
1475 | |||
1476 | DBG1("base_addr: %p", dc->base_addr); | ||
1477 | |||
1478 | make_sysfs_files(dc); | ||
1479 | |||
1480 | dc->index_start = ndev_idx * MAX_PORT; | ||
1481 | ndevs[ndev_idx] = dc; | ||
1482 | |||
1483 | for (i = 0; i < MAX_PORT; i++) { | ||
1484 | mutex_init(&dc->port[i].tty_sem); | ||
1485 | dc->port[i].tty_open_count = 0; | ||
1486 | dc->port[i].tty = NULL; | ||
1487 | tty_register_device(ntty_driver, dc->index_start + i, | ||
1488 | &pdev->dev); | ||
1489 | } | ||
1490 | |||
1491 | /* Enable RESET interrupt. */ | ||
1492 | dc->last_ier = RESET; | ||
1493 | writew(dc->last_ier, dc->reg_ier); | ||
1494 | |||
1495 | pci_set_drvdata(pdev, dc); | ||
1496 | |||
1497 | return 0; | ||
1498 | |||
1499 | err_free_sbuf: | ||
1500 | kfree(dc->send_buf); | ||
1501 | iounmap(dc->base_addr); | ||
1502 | err_rel_regs: | ||
1503 | pci_release_regions(pdev); | ||
1504 | err_disable_device: | ||
1505 | pci_disable_device(pdev); | ||
1506 | err_free: | ||
1507 | kfree(dc); | ||
1508 | err: | ||
1509 | return ret; | ||
1510 | } | ||
1511 | |||
1512 | static void __devexit tty_exit(struct nozomi *dc) | ||
1513 | { | ||
1514 | unsigned int i; | ||
1515 | |||
1516 | DBG1(" "); | ||
1517 | |||
1518 | flush_scheduled_work(); | ||
1519 | |||
1520 | for (i = 0; i < MAX_PORT; ++i) | ||
1521 | if (dc->port[i].tty && \ | ||
1522 | list_empty(&dc->port[i].tty->hangup_work.entry)) | ||
1523 | tty_hangup(dc->port[i].tty); | ||
1524 | |||
1525 | while (dc->open_ttys) | ||
1526 | msleep(1); | ||
1527 | |||
1528 | for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i) | ||
1529 | tty_unregister_device(ntty_driver, i); | ||
1530 | } | ||
1531 | |||
1532 | /* Deallocate memory for one device */ | ||
1533 | static void __devexit nozomi_card_exit(struct pci_dev *pdev) | ||
1534 | { | ||
1535 | int i; | ||
1536 | struct ctrl_ul ctrl; | ||
1537 | struct nozomi *dc = pci_get_drvdata(pdev); | ||
1538 | |||
1539 | /* Disable all interrupts */ | ||
1540 | dc->last_ier = 0; | ||
1541 | writew(dc->last_ier, dc->reg_ier); | ||
1542 | |||
1543 | tty_exit(dc); | ||
1544 | |||
1545 | /* Send 0x0001, command card to resend the reset token. */ | ||
1546 | /* This is to get the reset when the module is reloaded. */ | ||
1547 | ctrl.port = 0x00; | ||
1548 | ctrl.reserved = 0; | ||
1549 | ctrl.RTS = 0; | ||
1550 | ctrl.DTR = 1; | ||
1551 | DBG1("sending flow control 0x%04X", *((u16 *)&ctrl)); | ||
1552 | |||
1553 | /* Setup dc->reg addresses to we can use defines here */ | ||
1554 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2); | ||
1555 | writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */ | ||
1556 | |||
1557 | remove_sysfs_files(dc); | ||
1558 | |||
1559 | free_irq(pdev->irq, dc); | ||
1560 | |||
1561 | for (i = 0; i < MAX_PORT; i++) | ||
1562 | if (dc->port[i].fifo_ul) | ||
1563 | kfifo_free(dc->port[i].fifo_ul); | ||
1564 | |||
1565 | kfree(dc->send_buf); | ||
1566 | |||
1567 | iounmap(dc->base_addr); | ||
1568 | |||
1569 | pci_release_regions(pdev); | ||
1570 | |||
1571 | pci_disable_device(pdev); | ||
1572 | |||
1573 | ndevs[dc->index_start / MAX_PORT] = NULL; | ||
1574 | |||
1575 | kfree(dc); | ||
1576 | } | ||
1577 | |||
1578 | static void set_rts(const struct tty_struct *tty, int rts) | ||
1579 | { | ||
1580 | struct port *port = get_port_by_tty(tty); | ||
1581 | |||
1582 | port->ctrl_ul.RTS = rts; | ||
1583 | port->update_flow_control = 1; | ||
1584 | enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty)); | ||
1585 | } | ||
1586 | |||
1587 | static void set_dtr(const struct tty_struct *tty, int dtr) | ||
1588 | { | ||
1589 | struct port *port = get_port_by_tty(tty); | ||
1590 | |||
1591 | DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr); | ||
1592 | |||
1593 | port->ctrl_ul.DTR = dtr; | ||
1594 | port->update_flow_control = 1; | ||
1595 | enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty)); | ||
1596 | } | ||
1597 | |||
1598 | /* | ||
1599 | * ---------------------------------------------------------------------------- | ||
1600 | * TTY code | ||
1601 | * ---------------------------------------------------------------------------- | ||
1602 | */ | ||
1603 | |||
1604 | /* Called when the userspace process opens the tty, /dev/noz*. */ | ||
1605 | static int ntty_open(struct tty_struct *tty, struct file *file) | ||
1606 | { | ||
1607 | struct port *port = get_port_by_tty(tty); | ||
1608 | struct nozomi *dc = get_dc_by_tty(tty); | ||
1609 | unsigned long flags; | ||
1610 | |||
1611 | if (!port || !dc) | ||
1612 | return -ENODEV; | ||
1613 | |||
1614 | if (mutex_lock_interruptible(&port->tty_sem)) | ||
1615 | return -ERESTARTSYS; | ||
1616 | |||
1617 | port->tty_open_count++; | ||
1618 | dc->open_ttys++; | ||
1619 | |||
1620 | /* Enable interrupt downlink for channel */ | ||
1621 | if (port->tty_open_count == 1) { | ||
1622 | tty->low_latency = 1; | ||
1623 | tty->driver_data = port; | ||
1624 | port->tty = tty; | ||
1625 | DBG1("open: %d", port->token_dl); | ||
1626 | spin_lock_irqsave(&dc->spin_mutex, flags); | ||
1627 | dc->last_ier = dc->last_ier | port->token_dl; | ||
1628 | writew(dc->last_ier, dc->reg_ier); | ||
1629 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | ||
1630 | } | ||
1631 | |||
1632 | mutex_unlock(&port->tty_sem); | ||
1633 | |||
1634 | return 0; | ||
1635 | } | ||
1636 | |||
1637 | /* Called when the userspace process close the tty, /dev/noz*. */ | ||
1638 | static void ntty_close(struct tty_struct *tty, struct file *file) | ||
1639 | { | ||
1640 | struct nozomi *dc = get_dc_by_tty(tty); | ||
1641 | struct port *port = tty->driver_data; | ||
1642 | unsigned long flags; | ||
1643 | |||
1644 | if (!dc || !port) | ||
1645 | return; | ||
1646 | |||
1647 | if (mutex_lock_interruptible(&port->tty_sem)) | ||
1648 | return; | ||
1649 | |||
1650 | if (!port->tty_open_count) | ||
1651 | goto exit; | ||
1652 | |||
1653 | dc->open_ttys--; | ||
1654 | port->tty_open_count--; | ||
1655 | |||
1656 | if (port->tty_open_count == 0) { | ||
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); | ||
1661 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | ||
1662 | } | ||
1663 | |||
1664 | exit: | ||
1665 | mutex_unlock(&port->tty_sem); | ||
1666 | } | ||
1667 | |||
1668 | /* | ||
1669 | * called when the userspace process writes to the tty (/dev/noz*). | ||
1670 | * Data is inserted into a fifo, which is then read and transfered to the modem. | ||
1671 | */ | ||
1672 | static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, | ||
1673 | int count) | ||
1674 | { | ||
1675 | int rval = -EINVAL; | ||
1676 | struct nozomi *dc = get_dc_by_tty(tty); | ||
1677 | struct port *port = tty->driver_data; | ||
1678 | unsigned long flags; | ||
1679 | |||
1680 | /* DBG1( "WRITEx: %d, index = %d", count, index); */ | ||
1681 | |||
1682 | if (!dc || !port) | ||
1683 | return -ENODEV; | ||
1684 | |||
1685 | if (unlikely(!mutex_trylock(&port->tty_sem))) { | ||
1686 | /* | ||
1687 | * must test lock as tty layer wraps calls | ||
1688 | * to this function with BKL | ||
1689 | */ | ||
1690 | dev_err(&dc->pdev->dev, "Would have deadlocked - " | ||
1691 | "return EAGAIN\n"); | ||
1692 | return -EAGAIN; | ||
1693 | } | ||
1694 | |||
1695 | if (unlikely(!port->tty_open_count)) { | ||
1696 | DBG1(" "); | ||
1697 | goto exit; | ||
1698 | } | ||
1699 | |||
1700 | rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count); | ||
1701 | |||
1702 | /* notify card */ | ||
1703 | if (unlikely(dc == NULL)) { | ||
1704 | DBG1("No device context?"); | ||
1705 | goto exit; | ||
1706 | } | ||
1707 | |||
1708 | spin_lock_irqsave(&dc->spin_mutex, flags); | ||
1709 | /* CTS is only valid on the modem channel */ | ||
1710 | if (port == &(dc->port[PORT_MDM])) { | ||
1711 | if (port->ctrl_dl.CTS) { | ||
1712 | DBG4("Enable interrupt"); | ||
1713 | enable_transmit_ul(tty->index % MAX_PORT, dc); | ||
1714 | } else { | ||
1715 | dev_err(&dc->pdev->dev, | ||
1716 | "CTS not active on modem port?\n"); | ||
1717 | } | ||
1718 | } else { | ||
1719 | enable_transmit_ul(tty->index % MAX_PORT, dc); | ||
1720 | } | ||
1721 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | ||
1722 | |||
1723 | exit: | ||
1724 | mutex_unlock(&port->tty_sem); | ||
1725 | return rval; | ||
1726 | } | ||
1727 | |||
1728 | /* | ||
1729 | * Calculate how much is left in device | ||
1730 | * This method is called by the upper tty layer. | ||
1731 | * #according to sources N_TTY.c it expects a value >= 0 and | ||
1732 | * does not check for negative values. | ||
1733 | */ | ||
1734 | static int ntty_write_room(struct tty_struct *tty) | ||
1735 | { | ||
1736 | struct port *port = tty->driver_data; | ||
1737 | int room = 0; | ||
1738 | struct nozomi *dc = get_dc_by_tty(tty); | ||
1739 | |||
1740 | if (!dc || !port) | ||
1741 | return 0; | ||
1742 | if (!mutex_trylock(&port->tty_sem)) | ||
1743 | return 0; | ||
1744 | |||
1745 | if (!port->tty_open_count) | ||
1746 | goto exit; | ||
1747 | |||
1748 | room = port->fifo_ul->size - __kfifo_len(port->fifo_ul); | ||
1749 | |||
1750 | exit: | ||
1751 | mutex_unlock(&port->tty_sem); | ||
1752 | return room; | ||
1753 | } | ||
1754 | |||
1755 | /* Gets io control parameters */ | ||
1756 | static int ntty_tiocmget(struct tty_struct *tty, struct file *file) | ||
1757 | { | ||
1758 | struct port *port = tty->driver_data; | ||
1759 | struct ctrl_dl *ctrl_dl = &port->ctrl_dl; | ||
1760 | struct ctrl_ul *ctrl_ul = &port->ctrl_ul; | ||
1761 | |||
1762 | return (ctrl_ul->RTS ? TIOCM_RTS : 0) | | ||
1763 | (ctrl_ul->DTR ? TIOCM_DTR : 0) | | ||
1764 | (ctrl_dl->DCD ? TIOCM_CAR : 0) | | ||
1765 | (ctrl_dl->RI ? TIOCM_RNG : 0) | | ||
1766 | (ctrl_dl->DSR ? TIOCM_DSR : 0) | | ||
1767 | (ctrl_dl->CTS ? TIOCM_CTS : 0); | ||
1768 | } | ||
1769 | |||
1770 | /* Sets io controls parameters */ | ||
1771 | static int ntty_tiocmset(struct tty_struct *tty, struct file *file, | ||
1772 | unsigned int set, unsigned int clear) | ||
1773 | { | ||
1774 | if (set & TIOCM_RTS) | ||
1775 | set_rts(tty, 1); | ||
1776 | else if (clear & TIOCM_RTS) | ||
1777 | set_rts(tty, 0); | ||
1778 | |||
1779 | if (set & TIOCM_DTR) | ||
1780 | set_dtr(tty, 1); | ||
1781 | else if (clear & TIOCM_DTR) | ||
1782 | set_dtr(tty, 0); | ||
1783 | |||
1784 | return 0; | ||
1785 | } | ||
1786 | |||
1787 | static int ntty_cflags_changed(struct port *port, unsigned long flags, | ||
1788 | struct async_icount *cprev) | ||
1789 | { | ||
1790 | struct async_icount cnow = port->tty_icount; | ||
1791 | int ret; | ||
1792 | |||
1793 | ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) || | ||
1794 | ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || | ||
1795 | ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || | ||
1796 | ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts)); | ||
1797 | |||
1798 | *cprev = cnow; | ||
1799 | |||
1800 | return ret; | ||
1801 | } | ||
1802 | |||
1803 | static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp) | ||
1804 | { | ||
1805 | struct async_icount cnow = port->tty_icount; | ||
1806 | struct serial_icounter_struct icount; | ||
1807 | |||
1808 | icount.cts = cnow.cts; | ||
1809 | icount.dsr = cnow.dsr; | ||
1810 | icount.rng = cnow.rng; | ||
1811 | icount.dcd = cnow.dcd; | ||
1812 | icount.rx = cnow.rx; | ||
1813 | icount.tx = cnow.tx; | ||
1814 | icount.frame = cnow.frame; | ||
1815 | icount.overrun = cnow.overrun; | ||
1816 | icount.parity = cnow.parity; | ||
1817 | icount.brk = cnow.brk; | ||
1818 | icount.buf_overrun = cnow.buf_overrun; | ||
1819 | |||
1820 | return copy_to_user(argp, &icount, sizeof(icount)); | ||
1821 | } | ||
1822 | |||
1823 | static int ntty_ioctl(struct tty_struct *tty, struct file *file, | ||
1824 | unsigned int cmd, unsigned long arg) | ||
1825 | { | ||
1826 | struct port *port = tty->driver_data; | ||
1827 | void __user *argp = (void __user *)arg; | ||
1828 | int rval = -ENOIOCTLCMD; | ||
1829 | |||
1830 | DBG1("******** IOCTL, cmd: %d", cmd); | ||
1831 | |||
1832 | switch (cmd) { | ||
1833 | case TIOCMIWAIT: { | ||
1834 | struct async_icount cprev = port->tty_icount; | ||
1835 | |||
1836 | rval = wait_event_interruptible(port->tty_wait, | ||
1837 | ntty_cflags_changed(port, arg, &cprev)); | ||
1838 | break; | ||
1839 | } case TIOCGICOUNT: | ||
1840 | rval = ntty_ioctl_tiocgicount(port, argp); | ||
1841 | break; | ||
1842 | default: | ||
1843 | DBG1("ERR: 0x%08X, %d", cmd, cmd); | ||
1844 | break; | ||
1845 | }; | ||
1846 | |||
1847 | return rval; | ||
1848 | } | ||
1849 | |||
1850 | /* | ||
1851 | * Called by the upper tty layer when tty buffers are ready | ||
1852 | * to receive data again after a call to throttle. | ||
1853 | */ | ||
1854 | static void ntty_unthrottle(struct tty_struct *tty) | ||
1855 | { | ||
1856 | struct nozomi *dc = get_dc_by_tty(tty); | ||
1857 | unsigned long flags; | ||
1858 | |||
1859 | DBG1("UNTHROTTLE"); | ||
1860 | spin_lock_irqsave(&dc->spin_mutex, flags); | ||
1861 | enable_transmit_dl(tty->index % MAX_PORT, dc); | ||
1862 | set_rts(tty, 1); | ||
1863 | |||
1864 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | ||
1865 | } | ||
1866 | |||
1867 | /* | ||
1868 | * Called by the upper tty layer when the tty buffers are almost full. | ||
1869 | * The driver should stop send more data. | ||
1870 | */ | ||
1871 | static void ntty_throttle(struct tty_struct *tty) | ||
1872 | { | ||
1873 | struct nozomi *dc = get_dc_by_tty(tty); | ||
1874 | unsigned long flags; | ||
1875 | |||
1876 | DBG1("THROTTLE"); | ||
1877 | spin_lock_irqsave(&dc->spin_mutex, flags); | ||
1878 | set_rts(tty, 0); | ||
1879 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | ||
1880 | } | ||
1881 | |||
1882 | /* just to discard single character writes */ | ||
1883 | static void ntty_put_char(struct tty_struct *tty, unsigned char c) | ||
1884 | { | ||
1885 | /* FIXME !!! */ | ||
1886 | DBG2("PUT CHAR Function: %c", c); | ||
1887 | } | ||
1888 | |||
1889 | /* Returns number of chars in buffer, called by tty layer */ | ||
1890 | static s32 ntty_chars_in_buffer(struct tty_struct *tty) | ||
1891 | { | ||
1892 | struct port *port = tty->driver_data; | ||
1893 | struct nozomi *dc = get_dc_by_tty(tty); | ||
1894 | s32 rval; | ||
1895 | |||
1896 | if (unlikely(!dc || !port)) { | ||
1897 | rval = -ENODEV; | ||
1898 | goto exit_in_buffer; | ||
1899 | } | ||
1900 | |||
1901 | if (unlikely(!port->tty_open_count)) { | ||
1902 | dev_err(&dc->pdev->dev, "No tty open?\n"); | ||
1903 | rval = -ENODEV; | ||
1904 | goto exit_in_buffer; | ||
1905 | } | ||
1906 | |||
1907 | rval = __kfifo_len(port->fifo_ul); | ||
1908 | |||
1909 | exit_in_buffer: | ||
1910 | return rval; | ||
1911 | } | ||
1912 | |||
1913 | static struct tty_operations tty_ops = { | ||
1914 | .ioctl = ntty_ioctl, | ||
1915 | .open = ntty_open, | ||
1916 | .close = ntty_close, | ||
1917 | .write = ntty_write, | ||
1918 | .write_room = ntty_write_room, | ||
1919 | .unthrottle = ntty_unthrottle, | ||
1920 | .throttle = ntty_throttle, | ||
1921 | .chars_in_buffer = ntty_chars_in_buffer, | ||
1922 | .put_char = ntty_put_char, | ||
1923 | .tiocmget = ntty_tiocmget, | ||
1924 | .tiocmset = ntty_tiocmset, | ||
1925 | }; | ||
1926 | |||
1927 | /* Module initialization */ | ||
1928 | static struct pci_driver nozomi_driver = { | ||
1929 | .name = NOZOMI_NAME, | ||
1930 | .id_table = nozomi_pci_tbl, | ||
1931 | .probe = nozomi_card_init, | ||
1932 | .remove = __devexit_p(nozomi_card_exit), | ||
1933 | }; | ||
1934 | |||
1935 | static __init int nozomi_init(void) | ||
1936 | { | ||
1937 | int ret; | ||
1938 | |||
1939 | printk(KERN_INFO "Initializing %s\n", VERSION_STRING); | ||
1940 | |||
1941 | ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS); | ||
1942 | if (!ntty_driver) | ||
1943 | return -ENOMEM; | ||
1944 | |||
1945 | ntty_driver->owner = THIS_MODULE; | ||
1946 | ntty_driver->driver_name = NOZOMI_NAME_TTY; | ||
1947 | ntty_driver->name = "noz"; | ||
1948 | ntty_driver->major = 0; | ||
1949 | ntty_driver->type = TTY_DRIVER_TYPE_SERIAL; | ||
1950 | ntty_driver->subtype = SERIAL_TYPE_NORMAL; | ||
1951 | ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | ||
1952 | ntty_driver->init_termios = tty_std_termios; | ||
1953 | ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \ | ||
1954 | HUPCL | CLOCAL; | ||
1955 | ntty_driver->init_termios.c_ispeed = 115200; | ||
1956 | ntty_driver->init_termios.c_ospeed = 115200; | ||
1957 | tty_set_operations(ntty_driver, &tty_ops); | ||
1958 | |||
1959 | ret = tty_register_driver(ntty_driver); | ||
1960 | if (ret) { | ||
1961 | printk(KERN_ERR "Nozomi: failed to register ntty driver\n"); | ||
1962 | goto free_tty; | ||
1963 | } | ||
1964 | |||
1965 | ret = pci_register_driver(&nozomi_driver); | ||
1966 | if (ret) { | ||
1967 | printk(KERN_ERR "Nozomi: can't register pci driver\n"); | ||
1968 | goto unr_tty; | ||
1969 | } | ||
1970 | |||
1971 | return 0; | ||
1972 | unr_tty: | ||
1973 | tty_unregister_driver(ntty_driver); | ||
1974 | free_tty: | ||
1975 | put_tty_driver(ntty_driver); | ||
1976 | return ret; | ||
1977 | } | ||
1978 | |||
1979 | static __exit void nozomi_exit(void) | ||
1980 | { | ||
1981 | printk(KERN_INFO "Unloading %s\n", DRIVER_DESC); | ||
1982 | pci_unregister_driver(&nozomi_driver); | ||
1983 | tty_unregister_driver(ntty_driver); | ||
1984 | put_tty_driver(ntty_driver); | ||
1985 | } | ||
1986 | |||
1987 | module_init(nozomi_init); | ||
1988 | module_exit(nozomi_exit); | ||
1989 | |||
1990 | module_param(debug, int, S_IRUGO | S_IWUSR); | ||
1991 | |||
1992 | MODULE_LICENSE("Dual BSD/GPL"); | ||
1993 | MODULE_DESCRIPTION(DRIVER_DESC); | ||