Root/
1 | /* |
2 | * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter |
3 | * |
4 | * Written by: Ulf Jakobsson, |
5 | * Jan Ã…kerfeldt, |
6 | * Stefan Thomasson, |
7 | * |
8 | * Maintained by: Paul Hardwick (p.hardwick@option.com) |
9 | * |
10 | * Patches: |
11 | * Locking code changes for Vodafone by Sphere Systems Ltd, |
12 | * Andrew Bird (ajb@spheresystems.co.uk ) |
13 | * & Phil Sanderson |
14 | * |
15 | * Source has been ported from an implementation made by Filip Aben @ Option |
16 | * |
17 | * -------------------------------------------------------------------------- |
18 | * |
19 | * Copyright (c) 2005,2006 Option Wireless Sweden AB |
20 | * Copyright (c) 2006 Sphere Systems Ltd |
21 | * Copyright (c) 2006 Option Wireless n/v |
22 | * All rights Reserved. |
23 | * |
24 | * This program is free software; you can redistribute it and/or modify |
25 | * it under the terms of the GNU General Public License as published by |
26 | * the Free Software Foundation; either version 2 of the License, or |
27 | * (at your option) any later version. |
28 | * |
29 | * This program is distributed in the hope that it will be useful, |
30 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
31 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
32 | * GNU General Public License for more details. |
33 | * |
34 | * You should have received a copy of the GNU General Public License |
35 | * along with this program; if not, write to the Free Software |
36 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
37 | * |
38 | * -------------------------------------------------------------------------- |
39 | */ |
40 | |
41 | /* Enable this to have a lot of debug printouts */ |
42 | #define DEBUG |
43 | |
44 | #include <linux/kernel.h> |
45 | #include <linux/module.h> |
46 | #include <linux/pci.h> |
47 | #include <linux/ioport.h> |
48 | #include <linux/tty.h> |
49 | #include <linux/tty_driver.h> |
50 | #include <linux/tty_flip.h> |
51 | #include <linux/sched.h> |
52 | #include <linux/serial.h> |
53 | #include <linux/interrupt.h> |
54 | #include <linux/kmod.h> |
55 | #include <linux/init.h> |
56 | #include <linux/kfifo.h> |
57 | #include <linux/uaccess.h> |
58 | #include <linux/slab.h> |
59 | #include <asm/byteorder.h> |
60 | |
61 | #include <linux/delay.h> |
62 | |
63 | |
64 | #define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \ |
65 | __DATE__ " " __TIME__ ")" |
66 | |
67 | /* Macros definitions */ |
68 | |
69 | /* Default debug printout level */ |
70 | #define NOZOMI_DEBUG_LEVEL 0x00 |
71 | |
72 | #define P_BUF_SIZE 128 |
73 | #define NFO(_err_flag_, args...) \ |
74 | do { \ |
75 | char tmp[P_BUF_SIZE]; \ |
76 | snprintf(tmp, sizeof(tmp), ##args); \ |
77 | printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \ |
78 | __func__, tmp); \ |
79 | } while (0) |
80 | |
81 | #define DBG1(args...) D_(0x01, ##args) |
82 | #define DBG2(args...) D_(0x02, ##args) |
83 | #define DBG3(args...) D_(0x04, ##args) |
84 | #define DBG4(args...) D_(0x08, ##args) |
85 | #define DBG5(args...) D_(0x10, ##args) |
86 | #define DBG6(args...) D_(0x20, ##args) |
87 | #define DBG7(args...) D_(0x40, ##args) |
88 | #define DBG8(args...) D_(0x80, ##args) |
89 | |
90 | #ifdef DEBUG |
91 | /* Do we need this settable at runtime? */ |
92 | static int debug = NOZOMI_DEBUG_LEVEL; |
93 | |
94 | #define D(lvl, args...) do \ |
95 | {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \ |
96 | while (0) |
97 | #define D_(lvl, args...) D(lvl, ##args) |
98 | |
99 | /* These printouts are always printed */ |
100 | |
101 | #else |
102 | static int debug; |
103 | #define D_(lvl, args...) |
104 | #endif |
105 | |
106 | /* TODO: rewrite to optimize macros... */ |
107 | |
108 | #define TMP_BUF_MAX 256 |
109 | |
110 | #define DUMP(buf__,len__) \ |
111 | do { \ |
112 | char tbuf[TMP_BUF_MAX] = {0};\ |
113 | if (len__ > 1) {\ |
114 | snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\ |
115 | if (tbuf[len__-2] == '\r') {\ |
116 | tbuf[len__-2] = 'r';\ |
117 | } \ |
118 | DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\ |
119 | } else {\ |
120 | DBG1("SENDING: '%s' (%d)", tbuf, len__);\ |
121 | } \ |
122 | } while (0) |
123 | |
124 | /* Defines */ |
125 | #define NOZOMI_NAME "nozomi" |
126 | #define NOZOMI_NAME_TTY "nozomi_tty" |
127 | #define DRIVER_DESC "Nozomi driver" |
128 | |
129 | #define NTTY_TTY_MAXMINORS 256 |
130 | #define NTTY_FIFO_BUFFER_SIZE 8192 |
131 | |
132 | /* Must be power of 2 */ |
133 | #define FIFO_BUFFER_SIZE_UL 8192 |
134 | |
135 | /* Size of tmp send buffer to card */ |
136 | #define SEND_BUF_MAX 1024 |
137 | #define RECEIVE_BUF_MAX 4 |
138 | |
139 | |
140 | #define R_IIR 0x0000 /* Interrupt Identity Register */ |
141 | #define R_FCR 0x0000 /* Flow Control Register */ |
142 | #define R_IER 0x0004 /* Interrupt Enable Register */ |
143 | |
144 | #define CONFIG_MAGIC 0xEFEFFEFE |
145 | #define TOGGLE_VALID 0x0000 |
146 | |
147 | /* Definition of interrupt tokens */ |
148 | #define MDM_DL1 0x0001 |
149 | #define MDM_UL1 0x0002 |
150 | #define MDM_DL2 0x0004 |
151 | #define MDM_UL2 0x0008 |
152 | #define DIAG_DL1 0x0010 |
153 | #define DIAG_DL2 0x0020 |
154 | #define DIAG_UL 0x0040 |
155 | #define APP1_DL 0x0080 |
156 | #define APP1_UL 0x0100 |
157 | #define APP2_DL 0x0200 |
158 | #define APP2_UL 0x0400 |
159 | #define CTRL_DL 0x0800 |
160 | #define CTRL_UL 0x1000 |
161 | #define RESET 0x8000 |
162 | |
163 | #define MDM_DL (MDM_DL1 | MDM_DL2) |
164 | #define MDM_UL (MDM_UL1 | MDM_UL2) |
165 | #define DIAG_DL (DIAG_DL1 | DIAG_DL2) |
166 | |
167 | /* modem signal definition */ |
168 | #define CTRL_DSR 0x0001 |
169 | #define CTRL_DCD 0x0002 |
170 | #define CTRL_RI 0x0004 |
171 | #define CTRL_CTS 0x0008 |
172 | |
173 | #define CTRL_DTR 0x0001 |
174 | #define CTRL_RTS 0x0002 |
175 | |
176 | #define MAX_PORT 4 |
177 | #define NOZOMI_MAX_PORTS 5 |
178 | #define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT) |
179 | |
180 | /* Type definitions */ |
181 | |
182 | /* |
183 | * There are two types of nozomi cards, |
184 | * one with 2048 memory and with 8192 memory |
185 | */ |
186 | enum card_type { |
187 | F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */ |
188 | F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */ |
189 | }; |
190 | |
191 | /* Initialization states a card can be in */ |
192 | enum card_state { |
193 | NOZOMI_STATE_UKNOWN = 0, |
194 | NOZOMI_STATE_ENABLED = 1, /* pci device enabled */ |
195 | NOZOMI_STATE_ALLOCATED = 2, /* config setup done */ |
196 | NOZOMI_STATE_READY = 3, /* flowcontrols received */ |
197 | }; |
198 | |
199 | /* Two different toggle channels exist */ |
200 | enum channel_type { |
201 | CH_A = 0, |
202 | CH_B = 1, |
203 | }; |
204 | |
205 | /* Port definition for the card regarding flow control */ |
206 | enum ctrl_port_type { |
207 | CTRL_CMD = 0, |
208 | CTRL_MDM = 1, |
209 | CTRL_DIAG = 2, |
210 | CTRL_APP1 = 3, |
211 | CTRL_APP2 = 4, |
212 | CTRL_ERROR = -1, |
213 | }; |
214 | |
215 | /* Ports that the nozomi has */ |
216 | enum port_type { |
217 | PORT_MDM = 0, |
218 | PORT_DIAG = 1, |
219 | PORT_APP1 = 2, |
220 | PORT_APP2 = 3, |
221 | PORT_CTRL = 4, |
222 | PORT_ERROR = -1, |
223 | }; |
224 | |
225 | #ifdef __BIG_ENDIAN |
226 | /* Big endian */ |
227 | |
228 | struct toggles { |
229 | unsigned int enabled:5; /* |
230 | * Toggle fields are valid if enabled is 0, |
231 | * else A-channels must always be used. |
232 | */ |
233 | unsigned int diag_dl:1; |
234 | unsigned int mdm_dl:1; |
235 | unsigned int mdm_ul:1; |
236 | } __attribute__ ((packed)); |
237 | |
238 | /* Configuration table to read at startup of card */ |
239 | /* Is for now only needed during initialization phase */ |
240 | struct config_table { |
241 | u32 signature; |
242 | u16 product_information; |
243 | u16 version; |
244 | u8 pad3[3]; |
245 | struct toggles toggle; |
246 | u8 pad1[4]; |
247 | u16 dl_mdm_len1; /* |
248 | * If this is 64, it can hold |
249 | * 60 bytes + 4 that is length field |
250 | */ |
251 | u16 dl_start; |
252 | |
253 | u16 dl_diag_len1; |
254 | u16 dl_mdm_len2; /* |
255 | * If this is 64, it can hold |
256 | * 60 bytes + 4 that is length field |
257 | */ |
258 | u16 dl_app1_len; |
259 | |
260 | u16 dl_diag_len2; |
261 | u16 dl_ctrl_len; |
262 | u16 dl_app2_len; |
263 | u8 pad2[16]; |
264 | u16 ul_mdm_len1; |
265 | u16 ul_start; |
266 | u16 ul_diag_len; |
267 | u16 ul_mdm_len2; |
268 | u16 ul_app1_len; |
269 | u16 ul_app2_len; |
270 | u16 ul_ctrl_len; |
271 | } __attribute__ ((packed)); |
272 | |
273 | /* This stores all control downlink flags */ |
274 | struct ctrl_dl { |
275 | u8 port; |
276 | unsigned int reserved:4; |
277 | unsigned int CTS:1; |
278 | unsigned int RI:1; |
279 | unsigned int DCD:1; |
280 | unsigned int DSR:1; |
281 | } __attribute__ ((packed)); |
282 | |
283 | /* This stores all control uplink flags */ |
284 | struct ctrl_ul { |
285 | u8 port; |
286 | unsigned int reserved:6; |
287 | unsigned int RTS:1; |
288 | unsigned int DTR:1; |
289 | } __attribute__ ((packed)); |
290 | |
291 | #else |
292 | /* Little endian */ |
293 | |
294 | /* This represents the toggle information */ |
295 | struct toggles { |
296 | unsigned int mdm_ul:1; |
297 | unsigned int mdm_dl:1; |
298 | unsigned int diag_dl:1; |
299 | unsigned int enabled:5; /* |
300 | * Toggle fields are valid if enabled is 0, |
301 | * else A-channels must always be used. |
302 | */ |
303 | } __attribute__ ((packed)); |
304 | |
305 | /* Configuration table to read at startup of card */ |
306 | struct config_table { |
307 | u32 signature; |
308 | u16 version; |
309 | u16 product_information; |
310 | struct toggles toggle; |
311 | u8 pad1[7]; |
312 | u16 dl_start; |
313 | u16 dl_mdm_len1; /* |
314 | * If this is 64, it can hold |
315 | * 60 bytes + 4 that is length field |
316 | */ |
317 | u16 dl_mdm_len2; |
318 | u16 dl_diag_len1; |
319 | u16 dl_diag_len2; |
320 | u16 dl_app1_len; |
321 | u16 dl_app2_len; |
322 | u16 dl_ctrl_len; |
323 | u8 pad2[16]; |
324 | u16 ul_start; |
325 | u16 ul_mdm_len2; |
326 | u16 ul_mdm_len1; |
327 | u16 ul_diag_len; |
328 | u16 ul_app1_len; |
329 | u16 ul_app2_len; |
330 | u16 ul_ctrl_len; |
331 | } __attribute__ ((packed)); |
332 | |
333 | /* This stores all control downlink flags */ |
334 | struct ctrl_dl { |
335 | unsigned int DSR:1; |
336 | unsigned int DCD:1; |
337 | unsigned int RI:1; |
338 | unsigned int CTS:1; |
339 | unsigned int reserverd:4; |
340 | u8 port; |
341 | } __attribute__ ((packed)); |
342 | |
343 | /* This stores all control uplink flags */ |
344 | struct ctrl_ul { |
345 | unsigned int DTR:1; |
346 | unsigned int RTS:1; |
347 | unsigned int reserved:6; |
348 | u8 port; |
349 | } __attribute__ ((packed)); |
350 | #endif |
351 | |
352 | /* This holds all information that is needed regarding a port */ |
353 | struct port { |
354 | struct tty_port port; |
355 | u8 update_flow_control; |
356 | struct ctrl_ul ctrl_ul; |
357 | struct ctrl_dl ctrl_dl; |
358 | struct kfifo fifo_ul; |
359 | void __iomem *dl_addr[2]; |
360 | u32 dl_size[2]; |
361 | u8 toggle_dl; |
362 | void __iomem *ul_addr[2]; |
363 | u32 ul_size[2]; |
364 | u8 toggle_ul; |
365 | u16 token_dl; |
366 | |
367 | /* mutex to ensure one access patch to this port */ |
368 | struct mutex tty_sem; |
369 | wait_queue_head_t tty_wait; |
370 | struct async_icount tty_icount; |
371 | |
372 | struct nozomi *dc; |
373 | }; |
374 | |
375 | /* Private data one for each card in the system */ |
376 | struct nozomi { |
377 | void __iomem *base_addr; |
378 | unsigned long flip; |
379 | |
380 | /* Pointers to registers */ |
381 | void __iomem *reg_iir; |
382 | void __iomem *reg_fcr; |
383 | void __iomem *reg_ier; |
384 | |
385 | u16 last_ier; |
386 | enum card_type card_type; |
387 | struct config_table config_table; /* Configuration table */ |
388 | struct pci_dev *pdev; |
389 | struct port port[NOZOMI_MAX_PORTS]; |
390 | u8 *send_buf; |
391 | |
392 | spinlock_t spin_mutex; /* secures access to registers and tty */ |
393 | |
394 | unsigned int index_start; |
395 | enum card_state state; |
396 | u32 open_ttys; |
397 | }; |
398 | |
399 | /* This is a data packet that is read or written to/from card */ |
400 | struct buffer { |
401 | u32 size; /* size is the length of the data buffer */ |
402 | u8 *data; |
403 | } __attribute__ ((packed)); |
404 | |
405 | /* Global variables */ |
406 | static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = { |
407 | {PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */ |
408 | {}, |
409 | }; |
410 | |
411 | MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl); |
412 | |
413 | static struct nozomi *ndevs[NOZOMI_MAX_CARDS]; |
414 | static struct tty_driver *ntty_driver; |
415 | |
416 | static const struct tty_port_operations noz_tty_port_ops; |
417 | |
418 | /* |
419 | * find card by tty_index |
420 | */ |
421 | static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty) |
422 | { |
423 | return tty ? ndevs[tty->index / MAX_PORT] : NULL; |
424 | } |
425 | |
426 | static inline struct port *get_port_by_tty(const struct tty_struct *tty) |
427 | { |
428 | struct nozomi *ndev = get_dc_by_tty(tty); |
429 | return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL; |
430 | } |
431 | |
432 | /* |
433 | * TODO: |
434 | * -Optimize |
435 | * -Rewrite cleaner |
436 | */ |
437 | |
438 | static void read_mem32(u32 *buf, const void __iomem *mem_addr_start, |
439 | u32 size_bytes) |
440 | { |
441 | u32 i = 0; |
442 | const u32 __iomem *ptr = mem_addr_start; |
443 | u16 *buf16; |
444 | |
445 | if (unlikely(!ptr || !buf)) |
446 | goto out; |
447 | |
448 | /* shortcut for extremely often used cases */ |
449 | switch (size_bytes) { |
450 | case 2: /* 2 bytes */ |
451 | buf16 = (u16 *) buf; |
452 | *buf16 = __le16_to_cpu(readw(ptr)); |
453 | goto out; |
454 | break; |
455 | case 4: /* 4 bytes */ |
456 | *(buf) = __le32_to_cpu(readl(ptr)); |
457 | goto out; |
458 | break; |
459 | } |
460 | |
461 | while (i < size_bytes) { |
462 | if (size_bytes - i == 2) { |
463 | /* Handle 2 bytes in the end */ |
464 | buf16 = (u16 *) buf; |
465 | *(buf16) = __le16_to_cpu(readw(ptr)); |
466 | i += 2; |
467 | } else { |
468 | /* Read 4 bytes */ |
469 | *(buf) = __le32_to_cpu(readl(ptr)); |
470 | i += 4; |
471 | } |
472 | buf++; |
473 | ptr++; |
474 | } |
475 | out: |
476 | return; |
477 | } |
478 | |
479 | /* |
480 | * TODO: |
481 | * -Optimize |
482 | * -Rewrite cleaner |
483 | */ |
484 | static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf, |
485 | u32 size_bytes) |
486 | { |
487 | u32 i = 0; |
488 | u32 __iomem *ptr = mem_addr_start; |
489 | const u16 *buf16; |
490 | |
491 | if (unlikely(!ptr || !buf)) |
492 | return 0; |
493 | |
494 | /* shortcut for extremely often used cases */ |
495 | switch (size_bytes) { |
496 | case 2: /* 2 bytes */ |
497 | buf16 = (const u16 *)buf; |
498 | writew(__cpu_to_le16(*buf16), ptr); |
499 | return 2; |
500 | break; |
501 | case 1: /* |
502 | * also needs to write 4 bytes in this case |
503 | * so falling through.. |
504 | */ |
505 | case 4: /* 4 bytes */ |
506 | writel(__cpu_to_le32(*buf), ptr); |
507 | return 4; |
508 | break; |
509 | } |
510 | |
511 | while (i < size_bytes) { |
512 | if (size_bytes - i == 2) { |
513 | /* 2 bytes */ |
514 | buf16 = (const u16 *)buf; |
515 | writew(__cpu_to_le16(*buf16), ptr); |
516 | i += 2; |
517 | } else { |
518 | /* 4 bytes */ |
519 | writel(__cpu_to_le32(*buf), ptr); |
520 | i += 4; |
521 | } |
522 | buf++; |
523 | ptr++; |
524 | } |
525 | return i; |
526 | } |
527 | |
528 | /* Setup pointers to different channels and also setup buffer sizes. */ |
529 | static void setup_memory(struct nozomi *dc) |
530 | { |
531 | void __iomem *offset = dc->base_addr + dc->config_table.dl_start; |
532 | /* The length reported is including the length field of 4 bytes, |
533 | * hence subtract with 4. |
534 | */ |
535 | const u16 buff_offset = 4; |
536 | |
537 | /* Modem port dl configuration */ |
538 | dc->port[PORT_MDM].dl_addr[CH_A] = offset; |
539 | dc->port[PORT_MDM].dl_addr[CH_B] = |
540 | (offset += dc->config_table.dl_mdm_len1); |
541 | dc->port[PORT_MDM].dl_size[CH_A] = |
542 | dc->config_table.dl_mdm_len1 - buff_offset; |
543 | dc->port[PORT_MDM].dl_size[CH_B] = |
544 | dc->config_table.dl_mdm_len2 - buff_offset; |
545 | |
546 | /* Diag port dl configuration */ |
547 | dc->port[PORT_DIAG].dl_addr[CH_A] = |
548 | (offset += dc->config_table.dl_mdm_len2); |
549 | dc->port[PORT_DIAG].dl_size[CH_A] = |
550 | dc->config_table.dl_diag_len1 - buff_offset; |
551 | dc->port[PORT_DIAG].dl_addr[CH_B] = |
552 | (offset += dc->config_table.dl_diag_len1); |
553 | dc->port[PORT_DIAG].dl_size[CH_B] = |
554 | dc->config_table.dl_diag_len2 - buff_offset; |
555 | |
556 | /* App1 port dl configuration */ |
557 | dc->port[PORT_APP1].dl_addr[CH_A] = |
558 | (offset += dc->config_table.dl_diag_len2); |
559 | dc->port[PORT_APP1].dl_size[CH_A] = |
560 | dc->config_table.dl_app1_len - buff_offset; |
561 | |
562 | /* App2 port dl configuration */ |
563 | dc->port[PORT_APP2].dl_addr[CH_A] = |
564 | (offset += dc->config_table.dl_app1_len); |
565 | dc->port[PORT_APP2].dl_size[CH_A] = |
566 | dc->config_table.dl_app2_len - buff_offset; |
567 | |
568 | /* Ctrl dl configuration */ |
569 | dc->port[PORT_CTRL].dl_addr[CH_A] = |
570 | (offset += dc->config_table.dl_app2_len); |
571 | dc->port[PORT_CTRL].dl_size[CH_A] = |
572 | dc->config_table.dl_ctrl_len - buff_offset; |
573 | |
574 | offset = dc->base_addr + dc->config_table.ul_start; |
575 | |
576 | /* Modem Port ul configuration */ |
577 | dc->port[PORT_MDM].ul_addr[CH_A] = offset; |
578 | dc->port[PORT_MDM].ul_size[CH_A] = |
579 | dc->config_table.ul_mdm_len1 - buff_offset; |
580 | dc->port[PORT_MDM].ul_addr[CH_B] = |
581 | (offset += dc->config_table.ul_mdm_len1); |
582 | dc->port[PORT_MDM].ul_size[CH_B] = |
583 | dc->config_table.ul_mdm_len2 - buff_offset; |
584 | |
585 | /* Diag port ul configuration */ |
586 | dc->port[PORT_DIAG].ul_addr[CH_A] = |
587 | (offset += dc->config_table.ul_mdm_len2); |
588 | dc->port[PORT_DIAG].ul_size[CH_A] = |
589 | dc->config_table.ul_diag_len - buff_offset; |
590 | |
591 | /* App1 port ul configuration */ |
592 | dc->port[PORT_APP1].ul_addr[CH_A] = |
593 | (offset += dc->config_table.ul_diag_len); |
594 | dc->port[PORT_APP1].ul_size[CH_A] = |
595 | dc->config_table.ul_app1_len - buff_offset; |
596 | |
597 | /* App2 port ul configuration */ |
598 | dc->port[PORT_APP2].ul_addr[CH_A] = |
599 | (offset += dc->config_table.ul_app1_len); |
600 | dc->port[PORT_APP2].ul_size[CH_A] = |
601 | dc->config_table.ul_app2_len - buff_offset; |
602 | |
603 | /* Ctrl ul configuration */ |
604 | dc->port[PORT_CTRL].ul_addr[CH_A] = |
605 | (offset += dc->config_table.ul_app2_len); |
606 | dc->port[PORT_CTRL].ul_size[CH_A] = |
607 | dc->config_table.ul_ctrl_len - buff_offset; |
608 | } |
609 | |
610 | /* Dump config table under initalization phase */ |
611 | #ifdef DEBUG |
612 | static void dump_table(const struct nozomi *dc) |
613 | { |
614 | DBG3("signature: 0x%08X", dc->config_table.signature); |
615 | DBG3("version: 0x%04X", dc->config_table.version); |
616 | DBG3("product_information: 0x%04X", \ |
617 | dc->config_table.product_information); |
618 | DBG3("toggle enabled: %d", dc->config_table.toggle.enabled); |
619 | DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul); |
620 | DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl); |
621 | DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl); |
622 | |
623 | DBG3("dl_start: 0x%04X", dc->config_table.dl_start); |
624 | DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1, |
625 | dc->config_table.dl_mdm_len1); |
626 | DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2, |
627 | dc->config_table.dl_mdm_len2); |
628 | DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1, |
629 | dc->config_table.dl_diag_len1); |
630 | DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2, |
631 | dc->config_table.dl_diag_len2); |
632 | DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len, |
633 | dc->config_table.dl_app1_len); |
634 | DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len, |
635 | dc->config_table.dl_app2_len); |
636 | DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len, |
637 | dc->config_table.dl_ctrl_len); |
638 | DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start, |
639 | dc->config_table.ul_start); |
640 | DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1, |
641 | dc->config_table.ul_mdm_len1); |
642 | DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2, |
643 | dc->config_table.ul_mdm_len2); |
644 | DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len, |
645 | dc->config_table.ul_diag_len); |
646 | DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len, |
647 | dc->config_table.ul_app1_len); |
648 | DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len, |
649 | dc->config_table.ul_app2_len); |
650 | DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len, |
651 | dc->config_table.ul_ctrl_len); |
652 | } |
653 | #else |
654 | static inline void dump_table(const struct nozomi *dc) { } |
655 | #endif |
656 | |
657 | /* |
658 | * Read configuration table from card under intalization phase |
659 | * Returns 1 if ok, else 0 |
660 | */ |
661 | static int nozomi_read_config_table(struct nozomi *dc) |
662 | { |
663 | read_mem32((u32 *) &dc->config_table, dc->base_addr + 0, |
664 | sizeof(struct config_table)); |
665 | |
666 | if (dc->config_table.signature != CONFIG_MAGIC) { |
667 | dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n", |
668 | dc->config_table.signature, CONFIG_MAGIC); |
669 | return 0; |
670 | } |
671 | |
672 | if ((dc->config_table.version == 0) |
673 | || (dc->config_table.toggle.enabled == TOGGLE_VALID)) { |
674 | int i; |
675 | DBG1("Second phase, configuring card"); |
676 | |
677 | setup_memory(dc); |
678 | |
679 | dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul; |
680 | dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl; |
681 | dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl; |
682 | DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d", |
683 | dc->port[PORT_MDM].toggle_ul, |
684 | dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl); |
685 | |
686 | dump_table(dc); |
687 | |
688 | for (i = PORT_MDM; i < MAX_PORT; i++) { |
689 | memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl)); |
690 | memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul)); |
691 | } |
692 | |
693 | /* Enable control channel */ |
694 | dc->last_ier = dc->last_ier | CTRL_DL; |
695 | writew(dc->last_ier, dc->reg_ier); |
696 | |
697 | dc->state = NOZOMI_STATE_ALLOCATED; |
698 | dev_info(&dc->pdev->dev, "Initialization OK!\n"); |
699 | return 1; |
700 | } |
701 | |
702 | if ((dc->config_table.version > 0) |
703 | && (dc->config_table.toggle.enabled != TOGGLE_VALID)) { |
704 | u32 offset = 0; |
705 | DBG1("First phase: pushing upload buffers, clearing download"); |
706 | |
707 | dev_info(&dc->pdev->dev, "Version of card: %d\n", |
708 | dc->config_table.version); |
709 | |
710 | /* Here we should disable all I/O over F32. */ |
711 | setup_memory(dc); |
712 | |
713 | /* |
714 | * We should send ALL channel pair tokens back along |
715 | * with reset token |
716 | */ |
717 | |
718 | /* push upload modem buffers */ |
719 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_A], |
720 | (u32 *) &offset, 4); |
721 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_B], |
722 | (u32 *) &offset, 4); |
723 | |
724 | writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr); |
725 | |
726 | DBG1("First phase done"); |
727 | } |
728 | |
729 | return 1; |
730 | } |
731 | |
732 | /* Enable uplink interrupts */ |
733 | static void enable_transmit_ul(enum port_type port, struct nozomi *dc) |
734 | { |
735 | static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL}; |
736 | |
737 | if (port < NOZOMI_MAX_PORTS) { |
738 | dc->last_ier |= mask[port]; |
739 | writew(dc->last_ier, dc->reg_ier); |
740 | } else { |
741 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); |
742 | } |
743 | } |
744 | |
745 | /* Disable uplink interrupts */ |
746 | static void disable_transmit_ul(enum port_type port, struct nozomi *dc) |
747 | { |
748 | static const u16 mask[] = |
749 | {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL}; |
750 | |
751 | if (port < NOZOMI_MAX_PORTS) { |
752 | dc->last_ier &= mask[port]; |
753 | writew(dc->last_ier, dc->reg_ier); |
754 | } else { |
755 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); |
756 | } |
757 | } |
758 | |
759 | /* Enable downlink interrupts */ |
760 | static void enable_transmit_dl(enum port_type port, struct nozomi *dc) |
761 | { |
762 | static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL}; |
763 | |
764 | if (port < NOZOMI_MAX_PORTS) { |
765 | dc->last_ier |= mask[port]; |
766 | writew(dc->last_ier, dc->reg_ier); |
767 | } else { |
768 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); |
769 | } |
770 | } |
771 | |
772 | /* Disable downlink interrupts */ |
773 | static void disable_transmit_dl(enum port_type port, struct nozomi *dc) |
774 | { |
775 | static const u16 mask[] = |
776 | {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL}; |
777 | |
778 | if (port < NOZOMI_MAX_PORTS) { |
779 | dc->last_ier &= mask[port]; |
780 | writew(dc->last_ier, dc->reg_ier); |
781 | } else { |
782 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); |
783 | } |
784 | } |
785 | |
786 | /* |
787 | * Return 1 - send buffer to card and ack. |
788 | * Return 0 - don't ack, don't send buffer to card. |
789 | */ |
790 | static int send_data(enum port_type index, struct nozomi *dc) |
791 | { |
792 | u32 size = 0; |
793 | struct port *port = &dc->port[index]; |
794 | const u8 toggle = port->toggle_ul; |
795 | void __iomem *addr = port->ul_addr[toggle]; |
796 | const u32 ul_size = port->ul_size[toggle]; |
797 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
798 | |
799 | /* Get data from tty and place in buf for now */ |
800 | size = kfifo_out(&port->fifo_ul, dc->send_buf, |
801 | ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX); |
802 | |
803 | if (size == 0) { |
804 | DBG4("No more data to send, disable link:"); |
805 | tty_kref_put(tty); |
806 | return 0; |
807 | } |
808 | |
809 | /* DUMP(buf, size); */ |
810 | |
811 | /* Write length + data */ |
812 | write_mem32(addr, (u32 *) &size, 4); |
813 | write_mem32(addr + 4, (u32 *) dc->send_buf, size); |
814 | |
815 | if (tty) |
816 | tty_wakeup(tty); |
817 | |
818 | tty_kref_put(tty); |
819 | return 1; |
820 | } |
821 | |
822 | /* If all data has been read, return 1, else 0 */ |
823 | static int receive_data(enum port_type index, struct nozomi *dc) |
824 | { |
825 | u8 buf[RECEIVE_BUF_MAX] = { 0 }; |
826 | int size; |
827 | u32 offset = 4; |
828 | struct port *port = &dc->port[index]; |
829 | void __iomem *addr = port->dl_addr[port->toggle_dl]; |
830 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
831 | int i, ret; |
832 | |
833 | if (unlikely(!tty)) { |
834 | DBG1("tty not open for port: %d?", index); |
835 | return 1; |
836 | } |
837 | |
838 | read_mem32((u32 *) &size, addr, 4); |
839 | /* DBG1( "%d bytes port: %d", size, index); */ |
840 | |
841 | if (test_bit(TTY_THROTTLED, &tty->flags)) { |
842 | DBG1("No room in tty, don't read data, don't ack interrupt, " |
843 | "disable interrupt"); |
844 | |
845 | /* disable interrupt in downlink... */ |
846 | disable_transmit_dl(index, dc); |
847 | ret = 0; |
848 | goto put; |
849 | } |
850 | |
851 | if (unlikely(size == 0)) { |
852 | dev_err(&dc->pdev->dev, "size == 0?\n"); |
853 | ret = 1; |
854 | goto put; |
855 | } |
856 | |
857 | while (size > 0) { |
858 | read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX); |
859 | |
860 | if (size == 1) { |
861 | tty_insert_flip_char(tty, buf[0], TTY_NORMAL); |
862 | size = 0; |
863 | } else if (size < RECEIVE_BUF_MAX) { |
864 | size -= tty_insert_flip_string(tty, (char *) buf, size); |
865 | } else { |
866 | i = tty_insert_flip_string(tty, \ |
867 | (char *) buf, RECEIVE_BUF_MAX); |
868 | size -= i; |
869 | offset += i; |
870 | } |
871 | } |
872 | |
873 | set_bit(index, &dc->flip); |
874 | ret = 1; |
875 | put: |
876 | tty_kref_put(tty); |
877 | return ret; |
878 | } |
879 | |
880 | /* Debug for interrupts */ |
881 | #ifdef DEBUG |
882 | static char *interrupt2str(u16 interrupt) |
883 | { |
884 | static char buf[TMP_BUF_MAX]; |
885 | char *p = buf; |
886 | |
887 | interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL; |
888 | interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
889 | "MDM_DL2 ") : NULL; |
890 | |
891 | interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
892 | "MDM_UL1 ") : NULL; |
893 | interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
894 | "MDM_UL2 ") : NULL; |
895 | |
896 | interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
897 | "DIAG_DL1 ") : NULL; |
898 | interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
899 | "DIAG_DL2 ") : NULL; |
900 | |
901 | interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
902 | "DIAG_UL ") : NULL; |
903 | |
904 | interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
905 | "APP1_DL ") : NULL; |
906 | interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
907 | "APP2_DL ") : NULL; |
908 | |
909 | interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
910 | "APP1_UL ") : NULL; |
911 | interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
912 | "APP2_UL ") : NULL; |
913 | |
914 | interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
915 | "CTRL_DL ") : NULL; |
916 | interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
917 | "CTRL_UL ") : NULL; |
918 | |
919 | interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
920 | "RESET ") : NULL; |
921 | |
922 | return buf; |
923 | } |
924 | #endif |
925 | |
926 | /* |
927 | * Receive flow control |
928 | * Return 1 - If ok, else 0 |
929 | */ |
930 | static int receive_flow_control(struct nozomi *dc) |
931 | { |
932 | enum port_type port = PORT_MDM; |
933 | struct ctrl_dl ctrl_dl; |
934 | struct ctrl_dl old_ctrl; |
935 | u16 enable_ier = 0; |
936 | |
937 | read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2); |
938 | |
939 | switch (ctrl_dl.port) { |
940 | case CTRL_CMD: |
941 | DBG1("The Base Band sends this value as a response to a " |
942 | "request for IMSI detach sent over the control " |
943 | "channel uplink (see section 7.6.1)."); |
944 | break; |
945 | case CTRL_MDM: |
946 | port = PORT_MDM; |
947 | enable_ier = MDM_DL; |
948 | break; |
949 | case CTRL_DIAG: |
950 | port = PORT_DIAG; |
951 | enable_ier = DIAG_DL; |
952 | break; |
953 | case CTRL_APP1: |
954 | port = PORT_APP1; |
955 | enable_ier = APP1_DL; |
956 | break; |
957 | case CTRL_APP2: |
958 | port = PORT_APP2; |
959 | enable_ier = APP2_DL; |
960 | if (dc->state == NOZOMI_STATE_ALLOCATED) { |
961 | /* |
962 | * After card initialization the flow control |
963 | * received for APP2 is always the last |
964 | */ |
965 | dc->state = NOZOMI_STATE_READY; |
966 | dev_info(&dc->pdev->dev, "Device READY!\n"); |
967 | } |
968 | break; |
969 | default: |
970 | dev_err(&dc->pdev->dev, |
971 | "ERROR: flow control received for non-existing port\n"); |
972 | return 0; |
973 | }; |
974 | |
975 | DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl), |
976 | *((u16 *)&ctrl_dl)); |
977 | |
978 | old_ctrl = dc->port[port].ctrl_dl; |
979 | dc->port[port].ctrl_dl = ctrl_dl; |
980 | |
981 | if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) { |
982 | DBG1("Disable interrupt (0x%04X) on port: %d", |
983 | enable_ier, port); |
984 | disable_transmit_ul(port, dc); |
985 | |
986 | } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) { |
987 | |
988 | if (kfifo_len(&dc->port[port].fifo_ul)) { |
989 | DBG1("Enable interrupt (0x%04X) on port: %d", |
990 | enable_ier, port); |
991 | DBG1("Data in buffer [%d], enable transmit! ", |
992 | kfifo_len(&dc->port[port].fifo_ul)); |
993 | enable_transmit_ul(port, dc); |
994 | } else { |
995 | DBG1("No data in buffer..."); |
996 | } |
997 | } |
998 | |
999 | if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) { |
1000 | DBG1(" No change in mctrl"); |
1001 | return 1; |
1002 | } |
1003 | /* Update statistics */ |
1004 | if (old_ctrl.CTS != ctrl_dl.CTS) |
1005 | dc->port[port].tty_icount.cts++; |
1006 | if (old_ctrl.DSR != ctrl_dl.DSR) |
1007 | dc->port[port].tty_icount.dsr++; |
1008 | if (old_ctrl.RI != ctrl_dl.RI) |
1009 | dc->port[port].tty_icount.rng++; |
1010 | if (old_ctrl.DCD != ctrl_dl.DCD) |
1011 | dc->port[port].tty_icount.dcd++; |
1012 | |
1013 | wake_up_interruptible(&dc->port[port].tty_wait); |
1014 | |
1015 | DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)", |
1016 | port, |
1017 | dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts, |
1018 | dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr); |
1019 | |
1020 | return 1; |
1021 | } |
1022 | |
1023 | static enum ctrl_port_type port2ctrl(enum port_type port, |
1024 | const struct nozomi *dc) |
1025 | { |
1026 | switch (port) { |
1027 | case PORT_MDM: |
1028 | return CTRL_MDM; |
1029 | case PORT_DIAG: |
1030 | return CTRL_DIAG; |
1031 | case PORT_APP1: |
1032 | return CTRL_APP1; |
1033 | case PORT_APP2: |
1034 | return CTRL_APP2; |
1035 | default: |
1036 | dev_err(&dc->pdev->dev, |
1037 | "ERROR: send flow control " \ |
1038 | "received for non-existing port\n"); |
1039 | }; |
1040 | return CTRL_ERROR; |
1041 | } |
1042 | |
1043 | /* |
1044 | * Send flow control, can only update one channel at a time |
1045 | * Return 0 - If we have updated all flow control |
1046 | * Return 1 - If we need to update more flow control, ack current enable more |
1047 | */ |
1048 | static int send_flow_control(struct nozomi *dc) |
1049 | { |
1050 | u32 i, more_flow_control_to_be_updated = 0; |
1051 | u16 *ctrl; |
1052 | |
1053 | for (i = PORT_MDM; i < MAX_PORT; i++) { |
1054 | if (dc->port[i].update_flow_control) { |
1055 | if (more_flow_control_to_be_updated) { |
1056 | /* We have more flow control to be updated */ |
1057 | return 1; |
1058 | } |
1059 | dc->port[i].ctrl_ul.port = port2ctrl(i, dc); |
1060 | ctrl = (u16 *)&dc->port[i].ctrl_ul; |
1061 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], \ |
1062 | (u32 *) ctrl, 2); |
1063 | dc->port[i].update_flow_control = 0; |
1064 | more_flow_control_to_be_updated = 1; |
1065 | } |
1066 | } |
1067 | return 0; |
1068 | } |
1069 | |
1070 | /* |
1071 | * Handle downlink data, ports that are handled are modem and diagnostics |
1072 | * Return 1 - ok |
1073 | * Return 0 - toggle fields are out of sync |
1074 | */ |
1075 | static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle, |
1076 | u16 read_iir, u16 mask1, u16 mask2) |
1077 | { |
1078 | if (*toggle == 0 && read_iir & mask1) { |
1079 | if (receive_data(port, dc)) { |
1080 | writew(mask1, dc->reg_fcr); |
1081 | *toggle = !(*toggle); |
1082 | } |
1083 | |
1084 | if (read_iir & mask2) { |
1085 | if (receive_data(port, dc)) { |
1086 | writew(mask2, dc->reg_fcr); |
1087 | *toggle = !(*toggle); |
1088 | } |
1089 | } |
1090 | } else if (*toggle == 1 && read_iir & mask2) { |
1091 | if (receive_data(port, dc)) { |
1092 | writew(mask2, dc->reg_fcr); |
1093 | *toggle = !(*toggle); |
1094 | } |
1095 | |
1096 | if (read_iir & mask1) { |
1097 | if (receive_data(port, dc)) { |
1098 | writew(mask1, dc->reg_fcr); |
1099 | *toggle = !(*toggle); |
1100 | } |
1101 | } |
1102 | } else { |
1103 | dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n", |
1104 | *toggle); |
1105 | return 0; |
1106 | } |
1107 | return 1; |
1108 | } |
1109 | |
1110 | /* |
1111 | * Handle uplink data, this is currently for the modem port |
1112 | * Return 1 - ok |
1113 | * Return 0 - toggle field are out of sync |
1114 | */ |
1115 | static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir) |
1116 | { |
1117 | u8 *toggle = &(dc->port[port].toggle_ul); |
1118 | |
1119 | if (*toggle == 0 && read_iir & MDM_UL1) { |
1120 | dc->last_ier &= ~MDM_UL; |
1121 | writew(dc->last_ier, dc->reg_ier); |
1122 | if (send_data(port, dc)) { |
1123 | writew(MDM_UL1, dc->reg_fcr); |
1124 | dc->last_ier = dc->last_ier | MDM_UL; |
1125 | writew(dc->last_ier, dc->reg_ier); |
1126 | *toggle = !*toggle; |
1127 | } |
1128 | |
1129 | if (read_iir & MDM_UL2) { |
1130 | dc->last_ier &= ~MDM_UL; |
1131 | writew(dc->last_ier, dc->reg_ier); |
1132 | if (send_data(port, dc)) { |
1133 | writew(MDM_UL2, dc->reg_fcr); |
1134 | dc->last_ier = dc->last_ier | MDM_UL; |
1135 | writew(dc->last_ier, dc->reg_ier); |
1136 | *toggle = !*toggle; |
1137 | } |
1138 | } |
1139 | |
1140 | } else if (*toggle == 1 && read_iir & MDM_UL2) { |
1141 | dc->last_ier &= ~MDM_UL; |
1142 | writew(dc->last_ier, dc->reg_ier); |
1143 | if (send_data(port, dc)) { |
1144 | writew(MDM_UL2, dc->reg_fcr); |
1145 | dc->last_ier = dc->last_ier | MDM_UL; |
1146 | writew(dc->last_ier, dc->reg_ier); |
1147 | *toggle = !*toggle; |
1148 | } |
1149 | |
1150 | if (read_iir & MDM_UL1) { |
1151 | dc->last_ier &= ~MDM_UL; |
1152 | writew(dc->last_ier, dc->reg_ier); |
1153 | if (send_data(port, dc)) { |
1154 | writew(MDM_UL1, dc->reg_fcr); |
1155 | dc->last_ier = dc->last_ier | MDM_UL; |
1156 | writew(dc->last_ier, dc->reg_ier); |
1157 | *toggle = !*toggle; |
1158 | } |
1159 | } |
1160 | } else { |
1161 | writew(read_iir & MDM_UL, dc->reg_fcr); |
1162 | dev_err(&dc->pdev->dev, "port out of sync!\n"); |
1163 | return 0; |
1164 | } |
1165 | return 1; |
1166 | } |
1167 | |
1168 | static irqreturn_t interrupt_handler(int irq, void *dev_id) |
1169 | { |
1170 | struct nozomi *dc = dev_id; |
1171 | unsigned int a; |
1172 | u16 read_iir; |
1173 | |
1174 | if (!dc) |
1175 | return IRQ_NONE; |
1176 | |
1177 | spin_lock(&dc->spin_mutex); |
1178 | read_iir = readw(dc->reg_iir); |
1179 | |
1180 | /* Card removed */ |
1181 | if (read_iir == (u16)-1) |
1182 | goto none; |
1183 | /* |
1184 | * Just handle interrupt enabled in IER |
1185 | * (by masking with dc->last_ier) |
1186 | */ |
1187 | read_iir &= dc->last_ier; |
1188 | |
1189 | if (read_iir == 0) |
1190 | goto none; |
1191 | |
1192 | |
1193 | DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir, |
1194 | dc->last_ier); |
1195 | |
1196 | if (read_iir & RESET) { |
1197 | if (unlikely(!nozomi_read_config_table(dc))) { |
1198 | dc->last_ier = 0x0; |
1199 | writew(dc->last_ier, dc->reg_ier); |
1200 | dev_err(&dc->pdev->dev, "Could not read status from " |
1201 | "card, we should disable interface\n"); |
1202 | } else { |
1203 | writew(RESET, dc->reg_fcr); |
1204 | } |
1205 | /* No more useful info if this was the reset interrupt. */ |
1206 | goto exit_handler; |
1207 | } |
1208 | if (read_iir & CTRL_UL) { |
1209 | DBG1("CTRL_UL"); |
1210 | dc->last_ier &= ~CTRL_UL; |
1211 | writew(dc->last_ier, dc->reg_ier); |
1212 | if (send_flow_control(dc)) { |
1213 | writew(CTRL_UL, dc->reg_fcr); |
1214 | dc->last_ier = dc->last_ier | CTRL_UL; |
1215 | writew(dc->last_ier, dc->reg_ier); |
1216 | } |
1217 | } |
1218 | if (read_iir & CTRL_DL) { |
1219 | receive_flow_control(dc); |
1220 | writew(CTRL_DL, dc->reg_fcr); |
1221 | } |
1222 | if (read_iir & MDM_DL) { |
1223 | if (!handle_data_dl(dc, PORT_MDM, |
1224 | &(dc->port[PORT_MDM].toggle_dl), read_iir, |
1225 | MDM_DL1, MDM_DL2)) { |
1226 | dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n"); |
1227 | goto exit_handler; |
1228 | } |
1229 | } |
1230 | if (read_iir & MDM_UL) { |
1231 | if (!handle_data_ul(dc, PORT_MDM, read_iir)) { |
1232 | dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n"); |
1233 | goto exit_handler; |
1234 | } |
1235 | } |
1236 | if (read_iir & DIAG_DL) { |
1237 | if (!handle_data_dl(dc, PORT_DIAG, |
1238 | &(dc->port[PORT_DIAG].toggle_dl), read_iir, |
1239 | DIAG_DL1, DIAG_DL2)) { |
1240 | dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n"); |
1241 | goto exit_handler; |
1242 | } |
1243 | } |
1244 | if (read_iir & DIAG_UL) { |
1245 | dc->last_ier &= ~DIAG_UL; |
1246 | writew(dc->last_ier, dc->reg_ier); |
1247 | if (send_data(PORT_DIAG, dc)) { |
1248 | writew(DIAG_UL, dc->reg_fcr); |
1249 | dc->last_ier = dc->last_ier | DIAG_UL; |
1250 | writew(dc->last_ier, dc->reg_ier); |
1251 | } |
1252 | } |
1253 | if (read_iir & APP1_DL) { |
1254 | if (receive_data(PORT_APP1, dc)) |
1255 | writew(APP1_DL, dc->reg_fcr); |
1256 | } |
1257 | if (read_iir & APP1_UL) { |
1258 | dc->last_ier &= ~APP1_UL; |
1259 | writew(dc->last_ier, dc->reg_ier); |
1260 | if (send_data(PORT_APP1, dc)) { |
1261 | writew(APP1_UL, dc->reg_fcr); |
1262 | dc->last_ier = dc->last_ier | APP1_UL; |
1263 | writew(dc->last_ier, dc->reg_ier); |
1264 | } |
1265 | } |
1266 | if (read_iir & APP2_DL) { |
1267 | if (receive_data(PORT_APP2, dc)) |
1268 | writew(APP2_DL, dc->reg_fcr); |
1269 | } |
1270 | if (read_iir & APP2_UL) { |
1271 | dc->last_ier &= ~APP2_UL; |
1272 | writew(dc->last_ier, dc->reg_ier); |
1273 | if (send_data(PORT_APP2, dc)) { |
1274 | writew(APP2_UL, dc->reg_fcr); |
1275 | dc->last_ier = dc->last_ier | APP2_UL; |
1276 | writew(dc->last_ier, dc->reg_ier); |
1277 | } |
1278 | } |
1279 | |
1280 | exit_handler: |
1281 | spin_unlock(&dc->spin_mutex); |
1282 | for (a = 0; a < NOZOMI_MAX_PORTS; a++) { |
1283 | struct tty_struct *tty; |
1284 | if (test_and_clear_bit(a, &dc->flip)) { |
1285 | tty = tty_port_tty_get(&dc->port[a].port); |
1286 | if (tty) |
1287 | tty_flip_buffer_push(tty); |
1288 | tty_kref_put(tty); |
1289 | } |
1290 | } |
1291 | return IRQ_HANDLED; |
1292 | none: |
1293 | spin_unlock(&dc->spin_mutex); |
1294 | return IRQ_NONE; |
1295 | } |
1296 | |
1297 | static void nozomi_get_card_type(struct nozomi *dc) |
1298 | { |
1299 | int i; |
1300 | u32 size = 0; |
1301 | |
1302 | for (i = 0; i < 6; i++) |
1303 | size += pci_resource_len(dc->pdev, i); |
1304 | |
1305 | /* Assume card type F32_8 if no match */ |
1306 | dc->card_type = size == 2048 ? F32_2 : F32_8; |
1307 | |
1308 | dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type); |
1309 | } |
1310 | |
1311 | static void nozomi_setup_private_data(struct nozomi *dc) |
1312 | { |
1313 | void __iomem *offset = dc->base_addr + dc->card_type / 2; |
1314 | unsigned int i; |
1315 | |
1316 | dc->reg_fcr = (void __iomem *)(offset + R_FCR); |
1317 | dc->reg_iir = (void __iomem *)(offset + R_IIR); |
1318 | dc->reg_ier = (void __iomem *)(offset + R_IER); |
1319 | dc->last_ier = 0; |
1320 | dc->flip = 0; |
1321 | |
1322 | dc->port[PORT_MDM].token_dl = MDM_DL; |
1323 | dc->port[PORT_DIAG].token_dl = DIAG_DL; |
1324 | dc->port[PORT_APP1].token_dl = APP1_DL; |
1325 | dc->port[PORT_APP2].token_dl = APP2_DL; |
1326 | |
1327 | for (i = 0; i < MAX_PORT; i++) |
1328 | init_waitqueue_head(&dc->port[i].tty_wait); |
1329 | } |
1330 | |
1331 | static ssize_t card_type_show(struct device *dev, struct device_attribute *attr, |
1332 | char *buf) |
1333 | { |
1334 | const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); |
1335 | |
1336 | return sprintf(buf, "%d\n", dc->card_type); |
1337 | } |
1338 | static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL); |
1339 | |
1340 | static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr, |
1341 | char *buf) |
1342 | { |
1343 | const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); |
1344 | |
1345 | return sprintf(buf, "%u\n", dc->open_ttys); |
1346 | } |
1347 | static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL); |
1348 | |
1349 | static void make_sysfs_files(struct nozomi *dc) |
1350 | { |
1351 | if (device_create_file(&dc->pdev->dev, &dev_attr_card_type)) |
1352 | dev_err(&dc->pdev->dev, |
1353 | "Could not create sysfs file for card_type\n"); |
1354 | if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys)) |
1355 | dev_err(&dc->pdev->dev, |
1356 | "Could not create sysfs file for open_ttys\n"); |
1357 | } |
1358 | |
1359 | static void remove_sysfs_files(struct nozomi *dc) |
1360 | { |
1361 | device_remove_file(&dc->pdev->dev, &dev_attr_card_type); |
1362 | device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys); |
1363 | } |
1364 | |
1365 | /* Allocate memory for one device */ |
1366 | static int __devinit nozomi_card_init(struct pci_dev *pdev, |
1367 | const struct pci_device_id *ent) |
1368 | { |
1369 | resource_size_t start; |
1370 | int ret; |
1371 | struct nozomi *dc = NULL; |
1372 | int ndev_idx; |
1373 | int i; |
1374 | |
1375 | dev_dbg(&pdev->dev, "Init, new card found\n"); |
1376 | |
1377 | for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++) |
1378 | if (!ndevs[ndev_idx]) |
1379 | break; |
1380 | |
1381 | if (ndev_idx >= ARRAY_SIZE(ndevs)) { |
1382 | dev_err(&pdev->dev, "no free tty range for this card left\n"); |
1383 | ret = -EIO; |
1384 | goto err; |
1385 | } |
1386 | |
1387 | dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL); |
1388 | if (unlikely(!dc)) { |
1389 | dev_err(&pdev->dev, "Could not allocate memory\n"); |
1390 | ret = -ENOMEM; |
1391 | goto err_free; |
1392 | } |
1393 | |
1394 | dc->pdev = pdev; |
1395 | |
1396 | ret = pci_enable_device(dc->pdev); |
1397 | if (ret) { |
1398 | dev_err(&pdev->dev, "Failed to enable PCI Device\n"); |
1399 | goto err_free; |
1400 | } |
1401 | |
1402 | ret = pci_request_regions(dc->pdev, NOZOMI_NAME); |
1403 | if (ret) { |
1404 | dev_err(&pdev->dev, "I/O address 0x%04x already in use\n", |
1405 | (int) /* nozomi_private.io_addr */ 0); |
1406 | goto err_disable_device; |
1407 | } |
1408 | |
1409 | start = pci_resource_start(dc->pdev, 0); |
1410 | if (start == 0) { |
1411 | dev_err(&pdev->dev, "No I/O address for card detected\n"); |
1412 | ret = -ENODEV; |
1413 | goto err_rel_regs; |
1414 | } |
1415 | |
1416 | /* Find out what card type it is */ |
1417 | nozomi_get_card_type(dc); |
1418 | |
1419 | dc->base_addr = ioremap_nocache(start, dc->card_type); |
1420 | if (!dc->base_addr) { |
1421 | dev_err(&pdev->dev, "Unable to map card MMIO\n"); |
1422 | ret = -ENODEV; |
1423 | goto err_rel_regs; |
1424 | } |
1425 | |
1426 | dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL); |
1427 | if (!dc->send_buf) { |
1428 | dev_err(&pdev->dev, "Could not allocate send buffer?\n"); |
1429 | ret = -ENOMEM; |
1430 | goto err_free_sbuf; |
1431 | } |
1432 | |
1433 | for (i = PORT_MDM; i < MAX_PORT; i++) { |
1434 | if (kfifo_alloc(&dc->port[i].fifo_ul, |
1435 | FIFO_BUFFER_SIZE_UL, GFP_ATOMIC)) { |
1436 | dev_err(&pdev->dev, |
1437 | "Could not allocate kfifo buffer\n"); |
1438 | ret = -ENOMEM; |
1439 | goto err_free_kfifo; |
1440 | } |
1441 | } |
1442 | |
1443 | spin_lock_init(&dc->spin_mutex); |
1444 | |
1445 | nozomi_setup_private_data(dc); |
1446 | |
1447 | /* Disable all interrupts */ |
1448 | dc->last_ier = 0; |
1449 | writew(dc->last_ier, dc->reg_ier); |
1450 | |
1451 | ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED, |
1452 | NOZOMI_NAME, dc); |
1453 | if (unlikely(ret)) { |
1454 | dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq); |
1455 | goto err_free_kfifo; |
1456 | } |
1457 | |
1458 | DBG1("base_addr: %p", dc->base_addr); |
1459 | |
1460 | make_sysfs_files(dc); |
1461 | |
1462 | dc->index_start = ndev_idx * MAX_PORT; |
1463 | ndevs[ndev_idx] = dc; |
1464 | |
1465 | pci_set_drvdata(pdev, dc); |
1466 | |
1467 | /* Enable RESET interrupt */ |
1468 | dc->last_ier = RESET; |
1469 | iowrite16(dc->last_ier, dc->reg_ier); |
1470 | |
1471 | dc->state = NOZOMI_STATE_ENABLED; |
1472 | |
1473 | for (i = 0; i < MAX_PORT; i++) { |
1474 | struct device *tty_dev; |
1475 | struct port *port = &dc->port[i]; |
1476 | port->dc = dc; |
1477 | mutex_init(&port->tty_sem); |
1478 | tty_port_init(&port->port); |
1479 | port->port.ops = &noz_tty_port_ops; |
1480 | tty_dev = tty_register_device(ntty_driver, dc->index_start + i, |
1481 | &pdev->dev); |
1482 | |
1483 | if (IS_ERR(tty_dev)) { |
1484 | ret = PTR_ERR(tty_dev); |
1485 | dev_err(&pdev->dev, "Could not allocate tty?\n"); |
1486 | goto err_free_tty; |
1487 | } |
1488 | } |
1489 | |
1490 | return 0; |
1491 | |
1492 | err_free_tty: |
1493 | for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i) |
1494 | tty_unregister_device(ntty_driver, i); |
1495 | err_free_kfifo: |
1496 | for (i = 0; i < MAX_PORT; i++) |
1497 | kfifo_free(&dc->port[i].fifo_ul); |
1498 | err_free_sbuf: |
1499 | kfree(dc->send_buf); |
1500 | iounmap(dc->base_addr); |
1501 | err_rel_regs: |
1502 | pci_release_regions(pdev); |
1503 | err_disable_device: |
1504 | pci_disable_device(pdev); |
1505 | err_free: |
1506 | kfree(dc); |
1507 | err: |
1508 | return ret; |
1509 | } |
1510 | |
1511 | static void __devexit tty_exit(struct nozomi *dc) |
1512 | { |
1513 | unsigned int i; |
1514 | |
1515 | DBG1(" "); |
1516 | |
1517 | flush_scheduled_work(); |
1518 | |
1519 | for (i = 0; i < MAX_PORT; ++i) { |
1520 | struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port); |
1521 | if (tty && list_empty(&tty->hangup_work.entry)) |
1522 | tty_hangup(tty); |
1523 | tty_kref_put(tty); |
1524 | } |
1525 | /* Racy below - surely should wait for scheduled work to be done or |
1526 | complete off a hangup method ? */ |
1527 | while (dc->open_ttys) |
1528 | msleep(1); |
1529 | for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i) |
1530 | tty_unregister_device(ntty_driver, i); |
1531 | } |
1532 | |
1533 | /* Deallocate memory for one device */ |
1534 | static void __devexit nozomi_card_exit(struct pci_dev *pdev) |
1535 | { |
1536 | int i; |
1537 | struct ctrl_ul ctrl; |
1538 | struct nozomi *dc = pci_get_drvdata(pdev); |
1539 | |
1540 | /* Disable all interrupts */ |
1541 | dc->last_ier = 0; |
1542 | writew(dc->last_ier, dc->reg_ier); |
1543 | |
1544 | tty_exit(dc); |
1545 | |
1546 | /* Send 0x0001, command card to resend the reset token. */ |
1547 | /* This is to get the reset when the module is reloaded. */ |
1548 | ctrl.port = 0x00; |
1549 | ctrl.reserved = 0; |
1550 | ctrl.RTS = 0; |
1551 | ctrl.DTR = 1; |
1552 | DBG1("sending flow control 0x%04X", *((u16 *)&ctrl)); |
1553 | |
1554 | /* Setup dc->reg addresses to we can use defines here */ |
1555 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2); |
1556 | writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */ |
1557 | |
1558 | remove_sysfs_files(dc); |
1559 | |
1560 | free_irq(pdev->irq, dc); |
1561 | |
1562 | for (i = 0; i < MAX_PORT; i++) |
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 | static int ntty_install(struct tty_driver *driver, struct tty_struct *tty) |
1605 | { |
1606 | struct port *port = get_port_by_tty(tty); |
1607 | struct nozomi *dc = get_dc_by_tty(tty); |
1608 | int ret; |
1609 | if (!port || !dc || dc->state != NOZOMI_STATE_READY) |
1610 | return -ENODEV; |
1611 | ret = tty_init_termios(tty); |
1612 | if (ret == 0) { |
1613 | tty_driver_kref_get(driver); |
1614 | driver->ttys[tty->index] = tty; |
1615 | } |
1616 | return ret; |
1617 | } |
1618 | |
1619 | static void ntty_cleanup(struct tty_struct *tty) |
1620 | { |
1621 | tty->driver_data = NULL; |
1622 | } |
1623 | |
1624 | static int ntty_activate(struct tty_port *tport, struct tty_struct *tty) |
1625 | { |
1626 | struct port *port = container_of(tport, struct port, port); |
1627 | struct nozomi *dc = port->dc; |
1628 | unsigned long flags; |
1629 | |
1630 | DBG1("open: %d", port->token_dl); |
1631 | spin_lock_irqsave(&dc->spin_mutex, flags); |
1632 | dc->last_ier = dc->last_ier | port->token_dl; |
1633 | writew(dc->last_ier, dc->reg_ier); |
1634 | dc->open_ttys++; |
1635 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
1636 | printk("noz: activated %d: %p\n", tty->index, tport); |
1637 | return 0; |
1638 | } |
1639 | |
1640 | static int ntty_open(struct tty_struct *tty, struct file *filp) |
1641 | { |
1642 | struct port *port = get_port_by_tty(tty); |
1643 | return tty_port_open(&port->port, tty, filp); |
1644 | } |
1645 | |
1646 | static void ntty_shutdown(struct tty_port *tport) |
1647 | { |
1648 | struct port *port = container_of(tport, struct port, port); |
1649 | struct nozomi *dc = port->dc; |
1650 | unsigned long flags; |
1651 | |
1652 | DBG1("close: %d", port->token_dl); |
1653 | spin_lock_irqsave(&dc->spin_mutex, flags); |
1654 | dc->last_ier &= ~(port->token_dl); |
1655 | writew(dc->last_ier, dc->reg_ier); |
1656 | dc->open_ttys--; |
1657 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
1658 | printk("noz: shutdown %p\n", tport); |
1659 | } |
1660 | |
1661 | static void ntty_close(struct tty_struct *tty, struct file *filp) |
1662 | { |
1663 | struct port *port = tty->driver_data; |
1664 | if (port) |
1665 | tty_port_close(&port->port, tty, filp); |
1666 | } |
1667 | |
1668 | static void ntty_hangup(struct tty_struct *tty) |
1669 | { |
1670 | struct port *port = tty->driver_data; |
1671 | tty_port_hangup(&port->port); |
1672 | } |
1673 | |
1674 | /* |
1675 | * called when the userspace process writes to the tty (/dev/noz*). |
1676 | * Data is inserted into a fifo, which is then read and transfered to the modem. |
1677 | */ |
1678 | static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, |
1679 | int count) |
1680 | { |
1681 | int rval = -EINVAL; |
1682 | struct nozomi *dc = get_dc_by_tty(tty); |
1683 | struct port *port = tty->driver_data; |
1684 | unsigned long flags; |
1685 | |
1686 | /* DBG1( "WRITEx: %d, index = %d", count, index); */ |
1687 | |
1688 | if (!dc || !port) |
1689 | return -ENODEV; |
1690 | |
1691 | mutex_lock(&port->tty_sem); |
1692 | |
1693 | if (unlikely(!port->port.count)) { |
1694 | DBG1(" "); |
1695 | goto exit; |
1696 | } |
1697 | |
1698 | rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count); |
1699 | |
1700 | /* notify card */ |
1701 | if (unlikely(dc == NULL)) { |
1702 | DBG1("No device context?"); |
1703 | goto exit; |
1704 | } |
1705 | |
1706 | spin_lock_irqsave(&dc->spin_mutex, flags); |
1707 | /* CTS is only valid on the modem channel */ |
1708 | if (port == &(dc->port[PORT_MDM])) { |
1709 | if (port->ctrl_dl.CTS) { |
1710 | DBG4("Enable interrupt"); |
1711 | enable_transmit_ul(tty->index % MAX_PORT, dc); |
1712 | } else { |
1713 | dev_err(&dc->pdev->dev, |
1714 | "CTS not active on modem port?\n"); |
1715 | } |
1716 | } else { |
1717 | enable_transmit_ul(tty->index % MAX_PORT, dc); |
1718 | } |
1719 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
1720 | |
1721 | exit: |
1722 | mutex_unlock(&port->tty_sem); |
1723 | return rval; |
1724 | } |
1725 | |
1726 | /* |
1727 | * Calculate how much is left in device |
1728 | * This method is called by the upper tty layer. |
1729 | * #according to sources N_TTY.c it expects a value >= 0 and |
1730 | * does not check for negative values. |
1731 | * |
1732 | * If the port is unplugged report lots of room and let the bits |
1733 | * dribble away so we don't block anything. |
1734 | */ |
1735 | static int ntty_write_room(struct tty_struct *tty) |
1736 | { |
1737 | struct port *port = tty->driver_data; |
1738 | int room = 4096; |
1739 | const struct nozomi *dc = get_dc_by_tty(tty); |
1740 | |
1741 | if (dc) { |
1742 | mutex_lock(&port->tty_sem); |
1743 | if (port->port.count) |
1744 | room = port->fifo_ul.size - |
1745 | kfifo_len(&port->fifo_ul); |
1746 | mutex_unlock(&port->tty_sem); |
1747 | } |
1748 | return room; |
1749 | } |
1750 | |
1751 | /* Gets io control parameters */ |
1752 | static int ntty_tiocmget(struct tty_struct *tty, struct file *file) |
1753 | { |
1754 | const struct port *port = tty->driver_data; |
1755 | const struct ctrl_dl *ctrl_dl = &port->ctrl_dl; |
1756 | const struct ctrl_ul *ctrl_ul = &port->ctrl_ul; |
1757 | |
1758 | /* Note: these could change under us but it is not clear this |
1759 | matters if so */ |
1760 | return (ctrl_ul->RTS ? TIOCM_RTS : 0) | |
1761 | (ctrl_ul->DTR ? TIOCM_DTR : 0) | |
1762 | (ctrl_dl->DCD ? TIOCM_CAR : 0) | |
1763 | (ctrl_dl->RI ? TIOCM_RNG : 0) | |
1764 | (ctrl_dl->DSR ? TIOCM_DSR : 0) | |
1765 | (ctrl_dl->CTS ? TIOCM_CTS : 0); |
1766 | } |
1767 | |
1768 | /* Sets io controls parameters */ |
1769 | static int ntty_tiocmset(struct tty_struct *tty, struct file *file, |
1770 | unsigned int set, unsigned int clear) |
1771 | { |
1772 | struct nozomi *dc = get_dc_by_tty(tty); |
1773 | unsigned long flags; |
1774 | |
1775 | spin_lock_irqsave(&dc->spin_mutex, flags); |
1776 | if (set & TIOCM_RTS) |
1777 | set_rts(tty, 1); |
1778 | else if (clear & TIOCM_RTS) |
1779 | set_rts(tty, 0); |
1780 | |
1781 | if (set & TIOCM_DTR) |
1782 | set_dtr(tty, 1); |
1783 | else if (clear & TIOCM_DTR) |
1784 | set_dtr(tty, 0); |
1785 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
1786 | |
1787 | return 0; |
1788 | } |
1789 | |
1790 | static int ntty_cflags_changed(struct port *port, unsigned long flags, |
1791 | struct async_icount *cprev) |
1792 | { |
1793 | const struct async_icount cnow = port->tty_icount; |
1794 | int ret; |
1795 | |
1796 | ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) || |
1797 | ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || |
1798 | ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || |
1799 | ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts)); |
1800 | |
1801 | *cprev = cnow; |
1802 | |
1803 | return ret; |
1804 | } |
1805 | |
1806 | static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp) |
1807 | { |
1808 | const struct async_icount cnow = port->tty_icount; |
1809 | struct serial_icounter_struct icount; |
1810 | |
1811 | icount.cts = cnow.cts; |
1812 | icount.dsr = cnow.dsr; |
1813 | icount.rng = cnow.rng; |
1814 | icount.dcd = cnow.dcd; |
1815 | icount.rx = cnow.rx; |
1816 | icount.tx = cnow.tx; |
1817 | icount.frame = cnow.frame; |
1818 | icount.overrun = cnow.overrun; |
1819 | icount.parity = cnow.parity; |
1820 | icount.brk = cnow.brk; |
1821 | icount.buf_overrun = cnow.buf_overrun; |
1822 | |
1823 | return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0; |
1824 | } |
1825 | |
1826 | static int ntty_ioctl(struct tty_struct *tty, struct file *file, |
1827 | unsigned int cmd, unsigned long arg) |
1828 | { |
1829 | struct port *port = tty->driver_data; |
1830 | void __user *argp = (void __user *)arg; |
1831 | int rval = -ENOIOCTLCMD; |
1832 | |
1833 | DBG1("******** IOCTL, cmd: %d", cmd); |
1834 | |
1835 | switch (cmd) { |
1836 | case TIOCMIWAIT: { |
1837 | struct async_icount cprev = port->tty_icount; |
1838 | |
1839 | rval = wait_event_interruptible(port->tty_wait, |
1840 | ntty_cflags_changed(port, arg, &cprev)); |
1841 | break; |
1842 | } case TIOCGICOUNT: |
1843 | rval = ntty_ioctl_tiocgicount(port, argp); |
1844 | break; |
1845 | default: |
1846 | DBG1("ERR: 0x%08X, %d", cmd, cmd); |
1847 | break; |
1848 | }; |
1849 | |
1850 | return rval; |
1851 | } |
1852 | |
1853 | /* |
1854 | * Called by the upper tty layer when tty buffers are ready |
1855 | * to receive data again after a call to throttle. |
1856 | */ |
1857 | static void ntty_unthrottle(struct tty_struct *tty) |
1858 | { |
1859 | struct nozomi *dc = get_dc_by_tty(tty); |
1860 | unsigned long flags; |
1861 | |
1862 | DBG1("UNTHROTTLE"); |
1863 | spin_lock_irqsave(&dc->spin_mutex, flags); |
1864 | enable_transmit_dl(tty->index % MAX_PORT, dc); |
1865 | set_rts(tty, 1); |
1866 | |
1867 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
1868 | } |
1869 | |
1870 | /* |
1871 | * Called by the upper tty layer when the tty buffers are almost full. |
1872 | * The driver should stop send more data. |
1873 | */ |
1874 | static void ntty_throttle(struct tty_struct *tty) |
1875 | { |
1876 | struct nozomi *dc = get_dc_by_tty(tty); |
1877 | unsigned long flags; |
1878 | |
1879 | DBG1("THROTTLE"); |
1880 | spin_lock_irqsave(&dc->spin_mutex, flags); |
1881 | set_rts(tty, 0); |
1882 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
1883 | } |
1884 | |
1885 | /* Returns number of chars in buffer, called by tty layer */ |
1886 | static s32 ntty_chars_in_buffer(struct tty_struct *tty) |
1887 | { |
1888 | struct port *port = tty->driver_data; |
1889 | struct nozomi *dc = get_dc_by_tty(tty); |
1890 | s32 rval = 0; |
1891 | |
1892 | if (unlikely(!dc || !port)) { |
1893 | goto exit_in_buffer; |
1894 | } |
1895 | |
1896 | if (unlikely(!port->port.count)) { |
1897 | dev_err(&dc->pdev->dev, "No tty open?\n"); |
1898 | goto exit_in_buffer; |
1899 | } |
1900 | |
1901 | rval = kfifo_len(&port->fifo_ul); |
1902 | |
1903 | exit_in_buffer: |
1904 | return rval; |
1905 | } |
1906 | |
1907 | static const struct tty_port_operations noz_tty_port_ops = { |
1908 | .activate = ntty_activate, |
1909 | .shutdown = ntty_shutdown, |
1910 | }; |
1911 | |
1912 | static const struct tty_operations tty_ops = { |
1913 | .ioctl = ntty_ioctl, |
1914 | .open = ntty_open, |
1915 | .close = ntty_close, |
1916 | .hangup = ntty_hangup, |
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 | .tiocmget = ntty_tiocmget, |
1923 | .tiocmset = ntty_tiocmset, |
1924 | .install = ntty_install, |
1925 | .cleanup = ntty_cleanup, |
1926 | }; |
1927 | |
1928 | /* Module initialization */ |
1929 | static struct pci_driver nozomi_driver = { |
1930 | .name = NOZOMI_NAME, |
1931 | .id_table = nozomi_pci_tbl, |
1932 | .probe = nozomi_card_init, |
1933 | .remove = __devexit_p(nozomi_card_exit), |
1934 | }; |
1935 | |
1936 | static __init int nozomi_init(void) |
1937 | { |
1938 | int ret; |
1939 | |
1940 | printk(KERN_INFO "Initializing %s\n", VERSION_STRING); |
1941 | |
1942 | ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS); |
1943 | if (!ntty_driver) |
1944 | return -ENOMEM; |
1945 | |
1946 | ntty_driver->owner = THIS_MODULE; |
1947 | ntty_driver->driver_name = NOZOMI_NAME_TTY; |
1948 | ntty_driver->name = "noz"; |
1949 | ntty_driver->major = 0; |
1950 | ntty_driver->type = TTY_DRIVER_TYPE_SERIAL; |
1951 | ntty_driver->subtype = SERIAL_TYPE_NORMAL; |
1952 | ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1953 | ntty_driver->init_termios = tty_std_termios; |
1954 | ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \ |
1955 | HUPCL | CLOCAL; |
1956 | ntty_driver->init_termios.c_ispeed = 115200; |
1957 | ntty_driver->init_termios.c_ospeed = 115200; |
1958 | tty_set_operations(ntty_driver, &tty_ops); |
1959 | |
1960 | ret = tty_register_driver(ntty_driver); |
1961 | if (ret) { |
1962 | printk(KERN_ERR "Nozomi: failed to register ntty driver\n"); |
1963 | goto free_tty; |
1964 | } |
1965 | |
1966 | ret = pci_register_driver(&nozomi_driver); |
1967 | if (ret) { |
1968 | printk(KERN_ERR "Nozomi: can't register pci driver\n"); |
1969 | goto unr_tty; |
1970 | } |
1971 | |
1972 | return 0; |
1973 | unr_tty: |
1974 | tty_unregister_driver(ntty_driver); |
1975 | free_tty: |
1976 | put_tty_driver(ntty_driver); |
1977 | return ret; |
1978 | } |
1979 | |
1980 | static __exit void nozomi_exit(void) |
1981 | { |
1982 | printk(KERN_INFO "Unloading %s\n", DRIVER_DESC); |
1983 | pci_unregister_driver(&nozomi_driver); |
1984 | tty_unregister_driver(ntty_driver); |
1985 | put_tty_driver(ntty_driver); |
1986 | } |
1987 | |
1988 | module_init(nozomi_init); |
1989 | module_exit(nozomi_exit); |
1990 | |
1991 | module_param(debug, int, S_IRUGO | S_IWUSR); |
1992 | |
1993 | MODULE_LICENSE("Dual BSD/GPL"); |
1994 | MODULE_DESCRIPTION(DRIVER_DESC); |
1995 |
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Tags:
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v2.6.34-rc5
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