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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" | |
65 | ||
66 | /* Macros definitions */ | |
67 | ||
68 | /* Default debug printout level */ | |
69 | #define NOZOMI_DEBUG_LEVEL 0x00 | |
70 | ||
71 | #define P_BUF_SIZE 128 | |
72 | #define NFO(_err_flag_, args...) \ | |
73 | do { \ | |
74 | char tmp[P_BUF_SIZE]; \ | |
75 | snprintf(tmp, sizeof(tmp), ##args); \ | |
76 | printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \ | |
77 | __func__, tmp); \ | |
78 | } while (0) | |
79 | ||
80 | #define DBG1(args...) D_(0x01, ##args) | |
81 | #define DBG2(args...) D_(0x02, ##args) | |
82 | #define DBG3(args...) D_(0x04, ##args) | |
83 | #define DBG4(args...) D_(0x08, ##args) | |
84 | #define DBG5(args...) D_(0x10, ##args) | |
85 | #define DBG6(args...) D_(0x20, ##args) | |
86 | #define DBG7(args...) D_(0x40, ##args) | |
87 | #define DBG8(args...) D_(0x80, ##args) | |
88 | ||
89 | #ifdef DEBUG | |
90 | /* Do we need this settable at runtime? */ | |
91 | static int debug = NOZOMI_DEBUG_LEVEL; | |
92 | ||
93 | #define D(lvl, args...) do \ | |
94 | {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \ | |
95 | while (0) | |
96 | #define D_(lvl, args...) D(lvl, ##args) | |
97 | ||
98 | /* These printouts are always printed */ | |
99 | ||
100 | #else | |
101 | static int debug; | |
102 | #define D_(lvl, args...) | |
103 | #endif | |
104 | ||
105 | /* TODO: rewrite to optimize macros... */ | |
106 | ||
107 | #define TMP_BUF_MAX 256 | |
108 | ||
109 | #define DUMP(buf__,len__) \ | |
110 | do { \ | |
111 | char tbuf[TMP_BUF_MAX] = {0};\ | |
112 | if (len__ > 1) {\ | |
113 | snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\ | |
114 | if (tbuf[len__-2] == '\r') {\ | |
115 | tbuf[len__-2] = 'r';\ | |
116 | } \ | |
117 | DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\ | |
118 | } else {\ | |
119 | DBG1("SENDING: '%s' (%d)", tbuf, len__);\ | |
120 | } \ | |
121 | } while (0) | |
122 | ||
123 | /* Defines */ | |
124 | #define NOZOMI_NAME "nozomi" | |
125 | #define NOZOMI_NAME_TTY "nozomi_tty" | |
126 | #define DRIVER_DESC "Nozomi driver" | |
127 | ||
128 | #define NTTY_TTY_MAXMINORS 256 | |
129 | #define NTTY_FIFO_BUFFER_SIZE 8192 | |
130 | ||
131 | /* Must be power of 2 */ | |
132 | #define FIFO_BUFFER_SIZE_UL 8192 | |
133 | ||
134 | /* Size of tmp send buffer to card */ | |
135 | #define SEND_BUF_MAX 1024 | |
136 | #define RECEIVE_BUF_MAX 4 | |
137 | ||
138 | ||
139 | #define R_IIR 0x0000 /* Interrupt Identity Register */ | |
140 | #define R_FCR 0x0000 /* Flow Control Register */ | |
141 | #define R_IER 0x0004 /* Interrupt Enable Register */ | |
142 | ||
143 | #define CONFIG_MAGIC 0xEFEFFEFE | |
144 | #define TOGGLE_VALID 0x0000 | |
145 | ||
146 | /* Definition of interrupt tokens */ | |
147 | #define MDM_DL1 0x0001 | |
148 | #define MDM_UL1 0x0002 | |
149 | #define MDM_DL2 0x0004 | |
150 | #define MDM_UL2 0x0008 | |
151 | #define DIAG_DL1 0x0010 | |
152 | #define DIAG_DL2 0x0020 | |
153 | #define DIAG_UL 0x0040 | |
154 | #define APP1_DL 0x0080 | |
155 | #define APP1_UL 0x0100 | |
156 | #define APP2_DL 0x0200 | |
157 | #define APP2_UL 0x0400 | |
158 | #define CTRL_DL 0x0800 | |
159 | #define CTRL_UL 0x1000 | |
160 | #define RESET 0x8000 | |
161 | ||
162 | #define MDM_DL (MDM_DL1 | MDM_DL2) | |
163 | #define MDM_UL (MDM_UL1 | MDM_UL2) | |
164 | #define DIAG_DL (DIAG_DL1 | DIAG_DL2) | |
165 | ||
166 | /* modem signal definition */ | |
167 | #define CTRL_DSR 0x0001 | |
168 | #define CTRL_DCD 0x0002 | |
169 | #define CTRL_RI 0x0004 | |
170 | #define CTRL_CTS 0x0008 | |
171 | ||
172 | #define CTRL_DTR 0x0001 | |
173 | #define CTRL_RTS 0x0002 | |
174 | ||
175 | #define MAX_PORT 4 | |
176 | #define NOZOMI_MAX_PORTS 5 | |
177 | #define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT) | |
178 | ||
179 | /* Type definitions */ | |
180 | ||
181 | /* | |
182 | * There are two types of nozomi cards, | |
183 | * one with 2048 memory and with 8192 memory | |
184 | */ | |
185 | enum card_type { | |
186 | F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */ | |
187 | F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */ | |
188 | }; | |
189 | ||
190 | /* Initialization states a card can be in */ | |
191 | enum card_state { | |
192 | NOZOMI_STATE_UKNOWN = 0, | |
193 | NOZOMI_STATE_ENABLED = 1, /* pci device enabled */ | |
194 | NOZOMI_STATE_ALLOCATED = 2, /* config setup done */ | |
195 | NOZOMI_STATE_READY = 3, /* flowcontrols received */ | |
196 | }; | |
197 | ||
198 | /* Two different toggle channels exist */ | |
199 | enum channel_type { | |
200 | CH_A = 0, | |
201 | CH_B = 1, | |
202 | }; | |
203 | ||
204 | /* Port definition for the card regarding flow control */ | |
205 | enum ctrl_port_type { | |
206 | CTRL_CMD = 0, | |
207 | CTRL_MDM = 1, | |
208 | CTRL_DIAG = 2, | |
209 | CTRL_APP1 = 3, | |
210 | CTRL_APP2 = 4, | |
211 | CTRL_ERROR = -1, | |
212 | }; | |
213 | ||
214 | /* Ports that the nozomi has */ | |
215 | enum port_type { | |
216 | PORT_MDM = 0, | |
217 | PORT_DIAG = 1, | |
218 | PORT_APP1 = 2, | |
219 | PORT_APP2 = 3, | |
220 | PORT_CTRL = 4, | |
221 | PORT_ERROR = -1, | |
222 | }; | |
223 | ||
224 | #ifdef __BIG_ENDIAN | |
225 | /* Big endian */ | |
226 | ||
227 | struct toggles { | |
228 | unsigned int enabled:5; /* | |
229 | * Toggle fields are valid if enabled is 0, | |
230 | * else A-channels must always be used. | |
231 | */ | |
232 | unsigned int diag_dl:1; | |
233 | unsigned int mdm_dl:1; | |
234 | unsigned int mdm_ul:1; | |
235 | } __attribute__ ((packed)); | |
236 | ||
237 | /* Configuration table to read at startup of card */ | |
238 | /* Is for now only needed during initialization phase */ | |
239 | struct config_table { | |
240 | u32 signature; | |
241 | u16 product_information; | |
242 | u16 version; | |
243 | u8 pad3[3]; | |
244 | struct toggles toggle; | |
245 | u8 pad1[4]; | |
246 | u16 dl_mdm_len1; /* | |
247 | * If this is 64, it can hold | |
248 | * 60 bytes + 4 that is length field | |
249 | */ | |
250 | u16 dl_start; | |
251 | ||
252 | u16 dl_diag_len1; | |
253 | u16 dl_mdm_len2; /* | |
254 | * If this is 64, it can hold | |
255 | * 60 bytes + 4 that is length field | |
256 | */ | |
257 | u16 dl_app1_len; | |
258 | ||
259 | u16 dl_diag_len2; | |
260 | u16 dl_ctrl_len; | |
261 | u16 dl_app2_len; | |
262 | u8 pad2[16]; | |
263 | u16 ul_mdm_len1; | |
264 | u16 ul_start; | |
265 | u16 ul_diag_len; | |
266 | u16 ul_mdm_len2; | |
267 | u16 ul_app1_len; | |
268 | u16 ul_app2_len; | |
269 | u16 ul_ctrl_len; | |
270 | } __attribute__ ((packed)); | |
271 | ||
272 | /* This stores all control downlink flags */ | |
273 | struct ctrl_dl { | |
274 | u8 port; | |
275 | unsigned int reserved:4; | |
276 | unsigned int CTS:1; | |
277 | unsigned int RI:1; | |
278 | unsigned int DCD:1; | |
279 | unsigned int DSR:1; | |
280 | } __attribute__ ((packed)); | |
281 | ||
282 | /* This stores all control uplink flags */ | |
283 | struct ctrl_ul { | |
284 | u8 port; | |
285 | unsigned int reserved:6; | |
286 | unsigned int RTS:1; | |
287 | unsigned int DTR:1; | |
288 | } __attribute__ ((packed)); | |
289 | ||
290 | #else | |
291 | /* Little endian */ | |
292 | ||
293 | /* This represents the toggle information */ | |
294 | struct toggles { | |
295 | unsigned int mdm_ul:1; | |
296 | unsigned int mdm_dl:1; | |
297 | unsigned int diag_dl:1; | |
298 | unsigned int enabled:5; /* | |
299 | * Toggle fields are valid if enabled is 0, | |
300 | * else A-channels must always be used. | |
301 | */ | |
302 | } __attribute__ ((packed)); | |
303 | ||
304 | /* Configuration table to read at startup of card */ | |
305 | struct config_table { | |
306 | u32 signature; | |
307 | u16 version; | |
308 | u16 product_information; | |
309 | struct toggles toggle; | |
310 | u8 pad1[7]; | |
311 | u16 dl_start; | |
312 | u16 dl_mdm_len1; /* | |
313 | * If this is 64, it can hold | |
314 | * 60 bytes + 4 that is length field | |
315 | */ | |
316 | u16 dl_mdm_len2; | |
317 | u16 dl_diag_len1; | |
318 | u16 dl_diag_len2; | |
319 | u16 dl_app1_len; | |
320 | u16 dl_app2_len; | |
321 | u16 dl_ctrl_len; | |
322 | u8 pad2[16]; | |
323 | u16 ul_start; | |
324 | u16 ul_mdm_len2; | |
325 | u16 ul_mdm_len1; | |
326 | u16 ul_diag_len; | |
327 | u16 ul_app1_len; | |
328 | u16 ul_app2_len; | |
329 | u16 ul_ctrl_len; | |
330 | } __attribute__ ((packed)); | |
331 | ||
332 | /* This stores all control downlink flags */ | |
333 | struct ctrl_dl { | |
334 | unsigned int DSR:1; | |
335 | unsigned int DCD:1; | |
336 | unsigned int RI:1; | |
337 | unsigned int CTS:1; | |
338 | unsigned int reserverd:4; | |
339 | u8 port; | |
340 | } __attribute__ ((packed)); | |
341 | ||
342 | /* This stores all control uplink flags */ | |
343 | struct ctrl_ul { | |
344 | unsigned int DTR:1; | |
345 | unsigned int RTS:1; | |
346 | unsigned int reserved:6; | |
347 | u8 port; | |
348 | } __attribute__ ((packed)); | |
349 | #endif | |
350 | ||
351 | /* This holds all information that is needed regarding a port */ | |
352 | struct port { | |
353 | struct tty_port port; | |
354 | u8 update_flow_control; | |
355 | struct ctrl_ul ctrl_ul; | |
356 | struct ctrl_dl ctrl_dl; | |
357 | struct kfifo fifo_ul; | |
358 | void __iomem *dl_addr[2]; | |
359 | u32 dl_size[2]; | |
360 | u8 toggle_dl; | |
361 | void __iomem *ul_addr[2]; | |
362 | u32 ul_size[2]; | |
363 | u8 toggle_ul; | |
364 | u16 token_dl; | |
365 | ||
366 | wait_queue_head_t tty_wait; | |
367 | struct async_icount tty_icount; | |
368 | ||
369 | struct nozomi *dc; | |
370 | }; | |
371 | ||
372 | /* Private data one for each card in the system */ | |
373 | struct nozomi { | |
374 | void __iomem *base_addr; | |
375 | unsigned long flip; | |
376 | ||
377 | /* Pointers to registers */ | |
378 | void __iomem *reg_iir; | |
379 | void __iomem *reg_fcr; | |
380 | void __iomem *reg_ier; | |
381 | ||
382 | u16 last_ier; | |
383 | enum card_type card_type; | |
384 | struct config_table config_table; /* Configuration table */ | |
385 | struct pci_dev *pdev; | |
386 | struct port port[NOZOMI_MAX_PORTS]; | |
387 | u8 *send_buf; | |
388 | ||
389 | spinlock_t spin_mutex; /* secures access to registers and tty */ | |
390 | ||
391 | unsigned int index_start; | |
392 | enum card_state state; | |
393 | u32 open_ttys; | |
394 | }; | |
395 | ||
396 | /* This is a data packet that is read or written to/from card */ | |
397 | struct buffer { | |
398 | u32 size; /* size is the length of the data buffer */ | |
399 | u8 *data; | |
400 | } __attribute__ ((packed)); | |
401 | ||
402 | /* Global variables */ | |
403 | static const struct pci_device_id nozomi_pci_tbl[] = { | |
404 | {PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */ | |
405 | {}, | |
406 | }; | |
407 | ||
408 | MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl); | |
409 | ||
410 | static struct nozomi *ndevs[NOZOMI_MAX_CARDS]; | |
411 | static struct tty_driver *ntty_driver; | |
412 | ||
413 | static const struct tty_port_operations noz_tty_port_ops; | |
414 | ||
415 | /* | |
416 | * find card by tty_index | |
417 | */ | |
418 | static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty) | |
419 | { | |
420 | return tty ? ndevs[tty->index / MAX_PORT] : NULL; | |
421 | } | |
422 | ||
423 | static inline struct port *get_port_by_tty(const struct tty_struct *tty) | |
424 | { | |
425 | struct nozomi *ndev = get_dc_by_tty(tty); | |
426 | return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL; | |
427 | } | |
428 | ||
429 | /* | |
430 | * TODO: | |
431 | * -Optimize | |
432 | * -Rewrite cleaner | |
433 | */ | |
434 | ||
435 | static void read_mem32(u32 *buf, const void __iomem *mem_addr_start, | |
436 | u32 size_bytes) | |
437 | { | |
438 | u32 i = 0; | |
439 | const u32 __iomem *ptr = mem_addr_start; | |
440 | u16 *buf16; | |
441 | ||
442 | if (unlikely(!ptr || !buf)) | |
443 | goto out; | |
444 | ||
445 | /* shortcut for extremely often used cases */ | |
446 | switch (size_bytes) { | |
447 | case 2: /* 2 bytes */ | |
448 | buf16 = (u16 *) buf; | |
449 | *buf16 = __le16_to_cpu(readw(ptr)); | |
450 | goto out; | |
451 | break; | |
452 | case 4: /* 4 bytes */ | |
453 | *(buf) = __le32_to_cpu(readl(ptr)); | |
454 | goto out; | |
455 | break; | |
456 | } | |
457 | ||
458 | while (i < size_bytes) { | |
459 | if (size_bytes - i == 2) { | |
460 | /* Handle 2 bytes in the end */ | |
461 | buf16 = (u16 *) buf; | |
462 | *(buf16) = __le16_to_cpu(readw(ptr)); | |
463 | i += 2; | |
464 | } else { | |
465 | /* Read 4 bytes */ | |
466 | *(buf) = __le32_to_cpu(readl(ptr)); | |
467 | i += 4; | |
468 | } | |
469 | buf++; | |
470 | ptr++; | |
471 | } | |
472 | out: | |
473 | return; | |
474 | } | |
475 | ||
476 | /* | |
477 | * TODO: | |
478 | * -Optimize | |
479 | * -Rewrite cleaner | |
480 | */ | |
481 | static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf, | |
482 | u32 size_bytes) | |
483 | { | |
484 | u32 i = 0; | |
485 | u32 __iomem *ptr = mem_addr_start; | |
486 | const u16 *buf16; | |
487 | ||
488 | if (unlikely(!ptr || !buf)) | |
489 | return 0; | |
490 | ||
491 | /* shortcut for extremely often used cases */ | |
492 | switch (size_bytes) { | |
493 | case 2: /* 2 bytes */ | |
494 | buf16 = (const u16 *)buf; | |
495 | writew(__cpu_to_le16(*buf16), ptr); | |
496 | return 2; | |
497 | break; | |
498 | case 1: /* | |
499 | * also needs to write 4 bytes in this case | |
500 | * so falling through.. | |
501 | */ | |
502 | case 4: /* 4 bytes */ | |
503 | writel(__cpu_to_le32(*buf), ptr); | |
504 | return 4; | |
505 | break; | |
506 | } | |
507 | ||
508 | while (i < size_bytes) { | |
509 | if (size_bytes - i == 2) { | |
510 | /* 2 bytes */ | |
511 | buf16 = (const u16 *)buf; | |
512 | writew(__cpu_to_le16(*buf16), ptr); | |
513 | i += 2; | |
514 | } else { | |
515 | /* 4 bytes */ | |
516 | writel(__cpu_to_le32(*buf), ptr); | |
517 | i += 4; | |
518 | } | |
519 | buf++; | |
520 | ptr++; | |
521 | } | |
522 | return i; | |
523 | } | |
524 | ||
525 | /* Setup pointers to different channels and also setup buffer sizes. */ | |
526 | static void setup_memory(struct nozomi *dc) | |
527 | { | |
528 | void __iomem *offset = dc->base_addr + dc->config_table.dl_start; | |
529 | /* The length reported is including the length field of 4 bytes, | |
530 | * hence subtract with 4. | |
531 | */ | |
532 | const u16 buff_offset = 4; | |
533 | ||
534 | /* Modem port dl configuration */ | |
535 | dc->port[PORT_MDM].dl_addr[CH_A] = offset; | |
536 | dc->port[PORT_MDM].dl_addr[CH_B] = | |
537 | (offset += dc->config_table.dl_mdm_len1); | |
538 | dc->port[PORT_MDM].dl_size[CH_A] = | |
539 | dc->config_table.dl_mdm_len1 - buff_offset; | |
540 | dc->port[PORT_MDM].dl_size[CH_B] = | |
541 | dc->config_table.dl_mdm_len2 - buff_offset; | |
542 | ||
543 | /* Diag port dl configuration */ | |
544 | dc->port[PORT_DIAG].dl_addr[CH_A] = | |
545 | (offset += dc->config_table.dl_mdm_len2); | |
546 | dc->port[PORT_DIAG].dl_size[CH_A] = | |
547 | dc->config_table.dl_diag_len1 - buff_offset; | |
548 | dc->port[PORT_DIAG].dl_addr[CH_B] = | |
549 | (offset += dc->config_table.dl_diag_len1); | |
550 | dc->port[PORT_DIAG].dl_size[CH_B] = | |
551 | dc->config_table.dl_diag_len2 - buff_offset; | |
552 | ||
553 | /* App1 port dl configuration */ | |
554 | dc->port[PORT_APP1].dl_addr[CH_A] = | |
555 | (offset += dc->config_table.dl_diag_len2); | |
556 | dc->port[PORT_APP1].dl_size[CH_A] = | |
557 | dc->config_table.dl_app1_len - buff_offset; | |
558 | ||
559 | /* App2 port dl configuration */ | |
560 | dc->port[PORT_APP2].dl_addr[CH_A] = | |
561 | (offset += dc->config_table.dl_app1_len); | |
562 | dc->port[PORT_APP2].dl_size[CH_A] = | |
563 | dc->config_table.dl_app2_len - buff_offset; | |
564 | ||
565 | /* Ctrl dl configuration */ | |
566 | dc->port[PORT_CTRL].dl_addr[CH_A] = | |
567 | (offset += dc->config_table.dl_app2_len); | |
568 | dc->port[PORT_CTRL].dl_size[CH_A] = | |
569 | dc->config_table.dl_ctrl_len - buff_offset; | |
570 | ||
571 | offset = dc->base_addr + dc->config_table.ul_start; | |
572 | ||
573 | /* Modem Port ul configuration */ | |
574 | dc->port[PORT_MDM].ul_addr[CH_A] = offset; | |
575 | dc->port[PORT_MDM].ul_size[CH_A] = | |
576 | dc->config_table.ul_mdm_len1 - buff_offset; | |
577 | dc->port[PORT_MDM].ul_addr[CH_B] = | |
578 | (offset += dc->config_table.ul_mdm_len1); | |
579 | dc->port[PORT_MDM].ul_size[CH_B] = | |
580 | dc->config_table.ul_mdm_len2 - buff_offset; | |
581 | ||
582 | /* Diag port ul configuration */ | |
583 | dc->port[PORT_DIAG].ul_addr[CH_A] = | |
584 | (offset += dc->config_table.ul_mdm_len2); | |
585 | dc->port[PORT_DIAG].ul_size[CH_A] = | |
586 | dc->config_table.ul_diag_len - buff_offset; | |
587 | ||
588 | /* App1 port ul configuration */ | |
589 | dc->port[PORT_APP1].ul_addr[CH_A] = | |
590 | (offset += dc->config_table.ul_diag_len); | |
591 | dc->port[PORT_APP1].ul_size[CH_A] = | |
592 | dc->config_table.ul_app1_len - buff_offset; | |
593 | ||
594 | /* App2 port ul configuration */ | |
595 | dc->port[PORT_APP2].ul_addr[CH_A] = | |
596 | (offset += dc->config_table.ul_app1_len); | |
597 | dc->port[PORT_APP2].ul_size[CH_A] = | |
598 | dc->config_table.ul_app2_len - buff_offset; | |
599 | ||
600 | /* Ctrl ul configuration */ | |
601 | dc->port[PORT_CTRL].ul_addr[CH_A] = | |
602 | (offset += dc->config_table.ul_app2_len); | |
603 | dc->port[PORT_CTRL].ul_size[CH_A] = | |
604 | dc->config_table.ul_ctrl_len - buff_offset; | |
605 | } | |
606 | ||
607 | /* Dump config table under initalization phase */ | |
608 | #ifdef DEBUG | |
609 | static void dump_table(const struct nozomi *dc) | |
610 | { | |
611 | DBG3("signature: 0x%08X", dc->config_table.signature); | |
612 | DBG3("version: 0x%04X", dc->config_table.version); | |
613 | DBG3("product_information: 0x%04X", \ | |
614 | dc->config_table.product_information); | |
615 | DBG3("toggle enabled: %d", dc->config_table.toggle.enabled); | |
616 | DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul); | |
617 | DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl); | |
618 | DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl); | |
619 | ||
620 | DBG3("dl_start: 0x%04X", dc->config_table.dl_start); | |
621 | DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1, | |
622 | dc->config_table.dl_mdm_len1); | |
623 | DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2, | |
624 | dc->config_table.dl_mdm_len2); | |
625 | DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1, | |
626 | dc->config_table.dl_diag_len1); | |
627 | DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2, | |
628 | dc->config_table.dl_diag_len2); | |
629 | DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len, | |
630 | dc->config_table.dl_app1_len); | |
631 | DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len, | |
632 | dc->config_table.dl_app2_len); | |
633 | DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len, | |
634 | dc->config_table.dl_ctrl_len); | |
635 | DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start, | |
636 | dc->config_table.ul_start); | |
637 | DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1, | |
638 | dc->config_table.ul_mdm_len1); | |
639 | DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2, | |
640 | dc->config_table.ul_mdm_len2); | |
641 | DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len, | |
642 | dc->config_table.ul_diag_len); | |
643 | DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len, | |
644 | dc->config_table.ul_app1_len); | |
645 | DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len, | |
646 | dc->config_table.ul_app2_len); | |
647 | DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len, | |
648 | dc->config_table.ul_ctrl_len); | |
649 | } | |
650 | #else | |
651 | static inline void dump_table(const struct nozomi *dc) { } | |
652 | #endif | |
653 | ||
654 | /* | |
655 | * Read configuration table from card under intalization phase | |
656 | * Returns 1 if ok, else 0 | |
657 | */ | |
658 | static int nozomi_read_config_table(struct nozomi *dc) | |
659 | { | |
660 | read_mem32((u32 *) &dc->config_table, dc->base_addr + 0, | |
661 | sizeof(struct config_table)); | |
662 | ||
663 | if (dc->config_table.signature != CONFIG_MAGIC) { | |
664 | dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n", | |
665 | dc->config_table.signature, CONFIG_MAGIC); | |
666 | return 0; | |
667 | } | |
668 | ||
669 | if ((dc->config_table.version == 0) | |
670 | || (dc->config_table.toggle.enabled == TOGGLE_VALID)) { | |
671 | int i; | |
672 | DBG1("Second phase, configuring card"); | |
673 | ||
674 | setup_memory(dc); | |
675 | ||
676 | dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul; | |
677 | dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl; | |
678 | dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl; | |
679 | DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d", | |
680 | dc->port[PORT_MDM].toggle_ul, | |
681 | dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl); | |
682 | ||
683 | dump_table(dc); | |
684 | ||
685 | for (i = PORT_MDM; i < MAX_PORT; i++) { | |
686 | memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl)); | |
687 | memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul)); | |
688 | } | |
689 | ||
690 | /* Enable control channel */ | |
691 | dc->last_ier = dc->last_ier | CTRL_DL; | |
692 | writew(dc->last_ier, dc->reg_ier); | |
693 | ||
694 | dc->state = NOZOMI_STATE_ALLOCATED; | |
695 | dev_info(&dc->pdev->dev, "Initialization OK!\n"); | |
696 | return 1; | |
697 | } | |
698 | ||
699 | if ((dc->config_table.version > 0) | |
700 | && (dc->config_table.toggle.enabled != TOGGLE_VALID)) { | |
701 | u32 offset = 0; | |
702 | DBG1("First phase: pushing upload buffers, clearing download"); | |
703 | ||
704 | dev_info(&dc->pdev->dev, "Version of card: %d\n", | |
705 | dc->config_table.version); | |
706 | ||
707 | /* Here we should disable all I/O over F32. */ | |
708 | setup_memory(dc); | |
709 | ||
710 | /* | |
711 | * We should send ALL channel pair tokens back along | |
712 | * with reset token | |
713 | */ | |
714 | ||
715 | /* push upload modem buffers */ | |
716 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_A], | |
717 | (u32 *) &offset, 4); | |
718 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_B], | |
719 | (u32 *) &offset, 4); | |
720 | ||
721 | writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr); | |
722 | ||
723 | DBG1("First phase done"); | |
724 | } | |
725 | ||
726 | return 1; | |
727 | } | |
728 | ||
729 | /* Enable uplink interrupts */ | |
730 | static void enable_transmit_ul(enum port_type port, struct nozomi *dc) | |
731 | { | |
732 | static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL}; | |
733 | ||
734 | if (port < NOZOMI_MAX_PORTS) { | |
735 | dc->last_ier |= mask[port]; | |
736 | writew(dc->last_ier, dc->reg_ier); | |
737 | } else { | |
738 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | |
739 | } | |
740 | } | |
741 | ||
742 | /* Disable uplink interrupts */ | |
743 | static void disable_transmit_ul(enum port_type port, struct nozomi *dc) | |
744 | { | |
745 | static const u16 mask[] = | |
746 | {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL}; | |
747 | ||
748 | if (port < NOZOMI_MAX_PORTS) { | |
749 | dc->last_ier &= mask[port]; | |
750 | writew(dc->last_ier, dc->reg_ier); | |
751 | } else { | |
752 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | |
753 | } | |
754 | } | |
755 | ||
756 | /* Enable downlink interrupts */ | |
757 | static void enable_transmit_dl(enum port_type port, struct nozomi *dc) | |
758 | { | |
759 | static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL}; | |
760 | ||
761 | if (port < NOZOMI_MAX_PORTS) { | |
762 | dc->last_ier |= mask[port]; | |
763 | writew(dc->last_ier, dc->reg_ier); | |
764 | } else { | |
765 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | |
766 | } | |
767 | } | |
768 | ||
769 | /* Disable downlink interrupts */ | |
770 | static void disable_transmit_dl(enum port_type port, struct nozomi *dc) | |
771 | { | |
772 | static const u16 mask[] = | |
773 | {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL}; | |
774 | ||
775 | if (port < NOZOMI_MAX_PORTS) { | |
776 | dc->last_ier &= mask[port]; | |
777 | writew(dc->last_ier, dc->reg_ier); | |
778 | } else { | |
779 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | |
780 | } | |
781 | } | |
782 | ||
783 | /* | |
784 | * Return 1 - send buffer to card and ack. | |
785 | * Return 0 - don't ack, don't send buffer to card. | |
786 | */ | |
787 | static int send_data(enum port_type index, struct nozomi *dc) | |
788 | { | |
789 | u32 size = 0; | |
790 | struct port *port = &dc->port[index]; | |
791 | const u8 toggle = port->toggle_ul; | |
792 | void __iomem *addr = port->ul_addr[toggle]; | |
793 | const u32 ul_size = port->ul_size[toggle]; | |
794 | ||
795 | /* Get data from tty and place in buf for now */ | |
796 | size = kfifo_out(&port->fifo_ul, dc->send_buf, | |
797 | ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX); | |
798 | ||
799 | if (size == 0) { | |
800 | DBG4("No more data to send, disable link:"); | |
801 | return 0; | |
802 | } | |
803 | ||
804 | /* DUMP(buf, size); */ | |
805 | ||
806 | /* Write length + data */ | |
807 | write_mem32(addr, (u32 *) &size, 4); | |
808 | write_mem32(addr + 4, (u32 *) dc->send_buf, size); | |
809 | ||
810 | tty_port_tty_wakeup(&port->port); | |
811 | ||
812 | return 1; | |
813 | } | |
814 | ||
815 | /* If all data has been read, return 1, else 0 */ | |
816 | static int receive_data(enum port_type index, struct nozomi *dc) | |
817 | { | |
818 | u8 buf[RECEIVE_BUF_MAX] = { 0 }; | |
819 | int size; | |
820 | u32 offset = 4; | |
821 | struct port *port = &dc->port[index]; | |
822 | void __iomem *addr = port->dl_addr[port->toggle_dl]; | |
823 | struct tty_struct *tty = tty_port_tty_get(&port->port); | |
824 | int i, ret; | |
825 | ||
826 | read_mem32((u32 *) &size, addr, 4); | |
827 | /* DBG1( "%d bytes port: %d", size, index); */ | |
828 | ||
829 | if (tty && test_bit(TTY_THROTTLED, &tty->flags)) { | |
830 | DBG1("No room in tty, don't read data, don't ack interrupt, " | |
831 | "disable interrupt"); | |
832 | ||
833 | /* disable interrupt in downlink... */ | |
834 | disable_transmit_dl(index, dc); | |
835 | ret = 0; | |
836 | goto put; | |
837 | } | |
838 | ||
839 | if (unlikely(size == 0)) { | |
840 | dev_err(&dc->pdev->dev, "size == 0?\n"); | |
841 | ret = 1; | |
842 | goto put; | |
843 | } | |
844 | ||
845 | while (size > 0) { | |
846 | read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX); | |
847 | ||
848 | if (size == 1) { | |
849 | tty_insert_flip_char(&port->port, buf[0], TTY_NORMAL); | |
850 | size = 0; | |
851 | } else if (size < RECEIVE_BUF_MAX) { | |
852 | size -= tty_insert_flip_string(&port->port, | |
853 | (char *)buf, size); | |
854 | } else { | |
855 | i = tty_insert_flip_string(&port->port, | |
856 | (char *)buf, RECEIVE_BUF_MAX); | |
857 | size -= i; | |
858 | offset += i; | |
859 | } | |
860 | } | |
861 | ||
862 | set_bit(index, &dc->flip); | |
863 | ret = 1; | |
864 | put: | |
865 | tty_kref_put(tty); | |
866 | return ret; | |
867 | } | |
868 | ||
869 | /* Debug for interrupts */ | |
870 | #ifdef DEBUG | |
871 | static char *interrupt2str(u16 interrupt) | |
872 | { | |
873 | static char buf[TMP_BUF_MAX]; | |
874 | char *p = buf; | |
875 | ||
876 | interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL; | |
877 | interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
878 | "MDM_DL2 ") : NULL; | |
879 | ||
880 | interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
881 | "MDM_UL1 ") : NULL; | |
882 | interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
883 | "MDM_UL2 ") : NULL; | |
884 | ||
885 | interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
886 | "DIAG_DL1 ") : NULL; | |
887 | interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
888 | "DIAG_DL2 ") : NULL; | |
889 | ||
890 | interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
891 | "DIAG_UL ") : NULL; | |
892 | ||
893 | interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
894 | "APP1_DL ") : NULL; | |
895 | interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
896 | "APP2_DL ") : NULL; | |
897 | ||
898 | interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
899 | "APP1_UL ") : NULL; | |
900 | interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
901 | "APP2_UL ") : NULL; | |
902 | ||
903 | interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
904 | "CTRL_DL ") : NULL; | |
905 | interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
906 | "CTRL_UL ") : NULL; | |
907 | ||
908 | interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf), | |
909 | "RESET ") : NULL; | |
910 | ||
911 | return buf; | |
912 | } | |
913 | #endif | |
914 | ||
915 | /* | |
916 | * Receive flow control | |
917 | * Return 1 - If ok, else 0 | |
918 | */ | |
919 | static int receive_flow_control(struct nozomi *dc) | |
920 | { | |
921 | enum port_type port = PORT_MDM; | |
922 | struct ctrl_dl ctrl_dl; | |
923 | struct ctrl_dl old_ctrl; | |
924 | u16 enable_ier = 0; | |
925 | ||
926 | read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2); | |
927 | ||
928 | switch (ctrl_dl.port) { | |
929 | case CTRL_CMD: | |
930 | DBG1("The Base Band sends this value as a response to a " | |
931 | "request for IMSI detach sent over the control " | |
932 | "channel uplink (see section 7.6.1)."); | |
933 | break; | |
934 | case CTRL_MDM: | |
935 | port = PORT_MDM; | |
936 | enable_ier = MDM_DL; | |
937 | break; | |
938 | case CTRL_DIAG: | |
939 | port = PORT_DIAG; | |
940 | enable_ier = DIAG_DL; | |
941 | break; | |
942 | case CTRL_APP1: | |
943 | port = PORT_APP1; | |
944 | enable_ier = APP1_DL; | |
945 | break; | |
946 | case CTRL_APP2: | |
947 | port = PORT_APP2; | |
948 | enable_ier = APP2_DL; | |
949 | if (dc->state == NOZOMI_STATE_ALLOCATED) { | |
950 | /* | |
951 | * After card initialization the flow control | |
952 | * received for APP2 is always the last | |
953 | */ | |
954 | dc->state = NOZOMI_STATE_READY; | |
955 | dev_info(&dc->pdev->dev, "Device READY!\n"); | |
956 | } | |
957 | break; | |
958 | default: | |
959 | dev_err(&dc->pdev->dev, | |
960 | "ERROR: flow control received for non-existing port\n"); | |
961 | return 0; | |
962 | } | |
963 | ||
964 | DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl), | |
965 | *((u16 *)&ctrl_dl)); | |
966 | ||
967 | old_ctrl = dc->port[port].ctrl_dl; | |
968 | dc->port[port].ctrl_dl = ctrl_dl; | |
969 | ||
970 | if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) { | |
971 | DBG1("Disable interrupt (0x%04X) on port: %d", | |
972 | enable_ier, port); | |
973 | disable_transmit_ul(port, dc); | |
974 | ||
975 | } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) { | |
976 | ||
977 | if (kfifo_len(&dc->port[port].fifo_ul)) { | |
978 | DBG1("Enable interrupt (0x%04X) on port: %d", | |
979 | enable_ier, port); | |
980 | DBG1("Data in buffer [%d], enable transmit! ", | |
981 | kfifo_len(&dc->port[port].fifo_ul)); | |
982 | enable_transmit_ul(port, dc); | |
983 | } else { | |
984 | DBG1("No data in buffer..."); | |
985 | } | |
986 | } | |
987 | ||
988 | if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) { | |
989 | DBG1(" No change in mctrl"); | |
990 | return 1; | |
991 | } | |
992 | /* Update statistics */ | |
993 | if (old_ctrl.CTS != ctrl_dl.CTS) | |
994 | dc->port[port].tty_icount.cts++; | |
995 | if (old_ctrl.DSR != ctrl_dl.DSR) | |
996 | dc->port[port].tty_icount.dsr++; | |
997 | if (old_ctrl.RI != ctrl_dl.RI) | |
998 | dc->port[port].tty_icount.rng++; | |
999 | if (old_ctrl.DCD != ctrl_dl.DCD) | |
1000 | dc->port[port].tty_icount.dcd++; | |
1001 | ||
1002 | wake_up_interruptible(&dc->port[port].tty_wait); | |
1003 | ||
1004 | DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)", | |
1005 | port, | |
1006 | dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts, | |
1007 | dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr); | |
1008 | ||
1009 | return 1; | |
1010 | } | |
1011 | ||
1012 | static enum ctrl_port_type port2ctrl(enum port_type port, | |
1013 | const struct nozomi *dc) | |
1014 | { | |
1015 | switch (port) { | |
1016 | case PORT_MDM: | |
1017 | return CTRL_MDM; | |
1018 | case PORT_DIAG: | |
1019 | return CTRL_DIAG; | |
1020 | case PORT_APP1: | |
1021 | return CTRL_APP1; | |
1022 | case PORT_APP2: | |
1023 | return CTRL_APP2; | |
1024 | default: | |
1025 | dev_err(&dc->pdev->dev, | |
1026 | "ERROR: send flow control " \ | |
1027 | "received for non-existing port\n"); | |
1028 | } | |
1029 | return CTRL_ERROR; | |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * Send flow control, can only update one channel at a time | |
1034 | * Return 0 - If we have updated all flow control | |
1035 | * Return 1 - If we need to update more flow control, ack current enable more | |
1036 | */ | |
1037 | static int send_flow_control(struct nozomi *dc) | |
1038 | { | |
1039 | u32 i, more_flow_control_to_be_updated = 0; | |
1040 | u16 *ctrl; | |
1041 | ||
1042 | for (i = PORT_MDM; i < MAX_PORT; i++) { | |
1043 | if (dc->port[i].update_flow_control) { | |
1044 | if (more_flow_control_to_be_updated) { | |
1045 | /* We have more flow control to be updated */ | |
1046 | return 1; | |
1047 | } | |
1048 | dc->port[i].ctrl_ul.port = port2ctrl(i, dc); | |
1049 | ctrl = (u16 *)&dc->port[i].ctrl_ul; | |
1050 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], \ | |
1051 | (u32 *) ctrl, 2); | |
1052 | dc->port[i].update_flow_control = 0; | |
1053 | more_flow_control_to_be_updated = 1; | |
1054 | } | |
1055 | } | |
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * Handle downlink data, ports that are handled are modem and diagnostics | |
1061 | * Return 1 - ok | |
1062 | * Return 0 - toggle fields are out of sync | |
1063 | */ | |
1064 | static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle, | |
1065 | u16 read_iir, u16 mask1, u16 mask2) | |
1066 | { | |
1067 | if (*toggle == 0 && read_iir & mask1) { | |
1068 | if (receive_data(port, dc)) { | |
1069 | writew(mask1, dc->reg_fcr); | |
1070 | *toggle = !(*toggle); | |
1071 | } | |
1072 | ||
1073 | if (read_iir & mask2) { | |
1074 | if (receive_data(port, dc)) { | |
1075 | writew(mask2, dc->reg_fcr); | |
1076 | *toggle = !(*toggle); | |
1077 | } | |
1078 | } | |
1079 | } else if (*toggle == 1 && read_iir & mask2) { | |
1080 | if (receive_data(port, dc)) { | |
1081 | writew(mask2, dc->reg_fcr); | |
1082 | *toggle = !(*toggle); | |
1083 | } | |
1084 | ||
1085 | if (read_iir & mask1) { | |
1086 | if (receive_data(port, dc)) { | |
1087 | writew(mask1, dc->reg_fcr); | |
1088 | *toggle = !(*toggle); | |
1089 | } | |
1090 | } | |
1091 | } else { | |
1092 | dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n", | |
1093 | *toggle); | |
1094 | return 0; | |
1095 | } | |
1096 | return 1; | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Handle uplink data, this is currently for the modem port | |
1101 | * Return 1 - ok | |
1102 | * Return 0 - toggle field are out of sync | |
1103 | */ | |
1104 | static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir) | |
1105 | { | |
1106 | u8 *toggle = &(dc->port[port].toggle_ul); | |
1107 | ||
1108 | if (*toggle == 0 && read_iir & MDM_UL1) { | |
1109 | dc->last_ier &= ~MDM_UL; | |
1110 | writew(dc->last_ier, dc->reg_ier); | |
1111 | if (send_data(port, dc)) { | |
1112 | writew(MDM_UL1, dc->reg_fcr); | |
1113 | dc->last_ier = dc->last_ier | MDM_UL; | |
1114 | writew(dc->last_ier, dc->reg_ier); | |
1115 | *toggle = !*toggle; | |
1116 | } | |
1117 | ||
1118 | if (read_iir & MDM_UL2) { | |
1119 | dc->last_ier &= ~MDM_UL; | |
1120 | writew(dc->last_ier, dc->reg_ier); | |
1121 | if (send_data(port, dc)) { | |
1122 | writew(MDM_UL2, dc->reg_fcr); | |
1123 | dc->last_ier = dc->last_ier | MDM_UL; | |
1124 | writew(dc->last_ier, dc->reg_ier); | |
1125 | *toggle = !*toggle; | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | } else if (*toggle == 1 && 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 | if (read_iir & MDM_UL1) { | |
1140 | dc->last_ier &= ~MDM_UL; | |
1141 | writew(dc->last_ier, dc->reg_ier); | |
1142 | if (send_data(port, dc)) { | |
1143 | writew(MDM_UL1, dc->reg_fcr); | |
1144 | dc->last_ier = dc->last_ier | MDM_UL; | |
1145 | writew(dc->last_ier, dc->reg_ier); | |
1146 | *toggle = !*toggle; | |
1147 | } | |
1148 | } | |
1149 | } else { | |
1150 | writew(read_iir & MDM_UL, dc->reg_fcr); | |
1151 | dev_err(&dc->pdev->dev, "port out of sync!\n"); | |
1152 | return 0; | |
1153 | } | |
1154 | return 1; | |
1155 | } | |
1156 | ||
1157 | static irqreturn_t interrupt_handler(int irq, void *dev_id) | |
1158 | { | |
1159 | struct nozomi *dc = dev_id; | |
1160 | unsigned int a; | |
1161 | u16 read_iir; | |
1162 | ||
1163 | if (!dc) | |
1164 | return IRQ_NONE; | |
1165 | ||
1166 | spin_lock(&dc->spin_mutex); | |
1167 | read_iir = readw(dc->reg_iir); | |
1168 | ||
1169 | /* Card removed */ | |
1170 | if (read_iir == (u16)-1) | |
1171 | goto none; | |
1172 | /* | |
1173 | * Just handle interrupt enabled in IER | |
1174 | * (by masking with dc->last_ier) | |
1175 | */ | |
1176 | read_iir &= dc->last_ier; | |
1177 | ||
1178 | if (read_iir == 0) | |
1179 | goto none; | |
1180 | ||
1181 | ||
1182 | DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir, | |
1183 | dc->last_ier); | |
1184 | ||
1185 | if (read_iir & RESET) { | |
1186 | if (unlikely(!nozomi_read_config_table(dc))) { | |
1187 | dc->last_ier = 0x0; | |
1188 | writew(dc->last_ier, dc->reg_ier); | |
1189 | dev_err(&dc->pdev->dev, "Could not read status from " | |
1190 | "card, we should disable interface\n"); | |
1191 | } else { | |
1192 | writew(RESET, dc->reg_fcr); | |
1193 | } | |
1194 | /* No more useful info if this was the reset interrupt. */ | |
1195 | goto exit_handler; | |
1196 | } | |
1197 | if (read_iir & CTRL_UL) { | |
1198 | DBG1("CTRL_UL"); | |
1199 | dc->last_ier &= ~CTRL_UL; | |
1200 | writew(dc->last_ier, dc->reg_ier); | |
1201 | if (send_flow_control(dc)) { | |
1202 | writew(CTRL_UL, dc->reg_fcr); | |
1203 | dc->last_ier = dc->last_ier | CTRL_UL; | |
1204 | writew(dc->last_ier, dc->reg_ier); | |
1205 | } | |
1206 | } | |
1207 | if (read_iir & CTRL_DL) { | |
1208 | receive_flow_control(dc); | |
1209 | writew(CTRL_DL, dc->reg_fcr); | |
1210 | } | |
1211 | if (read_iir & MDM_DL) { | |
1212 | if (!handle_data_dl(dc, PORT_MDM, | |
1213 | &(dc->port[PORT_MDM].toggle_dl), read_iir, | |
1214 | MDM_DL1, MDM_DL2)) { | |
1215 | dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n"); | |
1216 | goto exit_handler; | |
1217 | } | |
1218 | } | |
1219 | if (read_iir & MDM_UL) { | |
1220 | if (!handle_data_ul(dc, PORT_MDM, read_iir)) { | |
1221 | dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n"); | |
1222 | goto exit_handler; | |
1223 | } | |
1224 | } | |
1225 | if (read_iir & DIAG_DL) { | |
1226 | if (!handle_data_dl(dc, PORT_DIAG, | |
1227 | &(dc->port[PORT_DIAG].toggle_dl), read_iir, | |
1228 | DIAG_DL1, DIAG_DL2)) { | |
1229 | dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n"); | |
1230 | goto exit_handler; | |
1231 | } | |
1232 | } | |
1233 | if (read_iir & DIAG_UL) { | |
1234 | dc->last_ier &= ~DIAG_UL; | |
1235 | writew(dc->last_ier, dc->reg_ier); | |
1236 | if (send_data(PORT_DIAG, dc)) { | |
1237 | writew(DIAG_UL, dc->reg_fcr); | |
1238 | dc->last_ier = dc->last_ier | DIAG_UL; | |
1239 | writew(dc->last_ier, dc->reg_ier); | |
1240 | } | |
1241 | } | |
1242 | if (read_iir & APP1_DL) { | |
1243 | if (receive_data(PORT_APP1, dc)) | |
1244 | writew(APP1_DL, dc->reg_fcr); | |
1245 | } | |
1246 | if (read_iir & APP1_UL) { | |
1247 | dc->last_ier &= ~APP1_UL; | |
1248 | writew(dc->last_ier, dc->reg_ier); | |
1249 | if (send_data(PORT_APP1, dc)) { | |
1250 | writew(APP1_UL, dc->reg_fcr); | |
1251 | dc->last_ier = dc->last_ier | APP1_UL; | |
1252 | writew(dc->last_ier, dc->reg_ier); | |
1253 | } | |
1254 | } | |
1255 | if (read_iir & APP2_DL) { | |
1256 | if (receive_data(PORT_APP2, dc)) | |
1257 | writew(APP2_DL, dc->reg_fcr); | |
1258 | } | |
1259 | if (read_iir & APP2_UL) { | |
1260 | dc->last_ier &= ~APP2_UL; | |
1261 | writew(dc->last_ier, dc->reg_ier); | |
1262 | if (send_data(PORT_APP2, dc)) { | |
1263 | writew(APP2_UL, dc->reg_fcr); | |
1264 | dc->last_ier = dc->last_ier | APP2_UL; | |
1265 | writew(dc->last_ier, dc->reg_ier); | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | exit_handler: | |
1270 | spin_unlock(&dc->spin_mutex); | |
1271 | ||
1272 | for (a = 0; a < NOZOMI_MAX_PORTS; a++) | |
1273 | if (test_and_clear_bit(a, &dc->flip)) | |
1274 | tty_flip_buffer_push(&dc->port[a].port); | |
1275 | ||
1276 | return IRQ_HANDLED; | |
1277 | none: | |
1278 | spin_unlock(&dc->spin_mutex); | |
1279 | return IRQ_NONE; | |
1280 | } | |
1281 | ||
1282 | static void nozomi_get_card_type(struct nozomi *dc) | |
1283 | { | |
1284 | int i; | |
1285 | u32 size = 0; | |
1286 | ||
1287 | for (i = 0; i < 6; i++) | |
1288 | size += pci_resource_len(dc->pdev, i); | |
1289 | ||
1290 | /* Assume card type F32_8 if no match */ | |
1291 | dc->card_type = size == 2048 ? F32_2 : F32_8; | |
1292 | ||
1293 | dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type); | |
1294 | } | |
1295 | ||
1296 | static void nozomi_setup_private_data(struct nozomi *dc) | |
1297 | { | |
1298 | void __iomem *offset = dc->base_addr + dc->card_type / 2; | |
1299 | unsigned int i; | |
1300 | ||
1301 | dc->reg_fcr = (void __iomem *)(offset + R_FCR); | |
1302 | dc->reg_iir = (void __iomem *)(offset + R_IIR); | |
1303 | dc->reg_ier = (void __iomem *)(offset + R_IER); | |
1304 | dc->last_ier = 0; | |
1305 | dc->flip = 0; | |
1306 | ||
1307 | dc->port[PORT_MDM].token_dl = MDM_DL; | |
1308 | dc->port[PORT_DIAG].token_dl = DIAG_DL; | |
1309 | dc->port[PORT_APP1].token_dl = APP1_DL; | |
1310 | dc->port[PORT_APP2].token_dl = APP2_DL; | |
1311 | ||
1312 | for (i = 0; i < MAX_PORT; i++) | |
1313 | init_waitqueue_head(&dc->port[i].tty_wait); | |
1314 | } | |
1315 | ||
1316 | static ssize_t card_type_show(struct device *dev, struct device_attribute *attr, | |
1317 | char *buf) | |
1318 | { | |
1319 | const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); | |
1320 | ||
1321 | return sprintf(buf, "%d\n", dc->card_type); | |
1322 | } | |
1323 | static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL); | |
1324 | ||
1325 | static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr, | |
1326 | char *buf) | |
1327 | { | |
1328 | const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); | |
1329 | ||
1330 | return sprintf(buf, "%u\n", dc->open_ttys); | |
1331 | } | |
1332 | static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL); | |
1333 | ||
1334 | static void make_sysfs_files(struct nozomi *dc) | |
1335 | { | |
1336 | if (device_create_file(&dc->pdev->dev, &dev_attr_card_type)) | |
1337 | dev_err(&dc->pdev->dev, | |
1338 | "Could not create sysfs file for card_type\n"); | |
1339 | if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys)) | |
1340 | dev_err(&dc->pdev->dev, | |
1341 | "Could not create sysfs file for open_ttys\n"); | |
1342 | } | |
1343 | ||
1344 | static void remove_sysfs_files(struct nozomi *dc) | |
1345 | { | |
1346 | device_remove_file(&dc->pdev->dev, &dev_attr_card_type); | |
1347 | device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys); | |
1348 | } | |
1349 | ||
1350 | /* Allocate memory for one device */ | |
1351 | static int nozomi_card_init(struct pci_dev *pdev, | |
1352 | const struct pci_device_id *ent) | |
1353 | { | |
1354 | resource_size_t start; | |
1355 | int ret; | |
1356 | struct nozomi *dc = NULL; | |
1357 | int ndev_idx; | |
1358 | int i; | |
1359 | ||
1360 | dev_dbg(&pdev->dev, "Init, new card found\n"); | |
1361 | ||
1362 | for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++) | |
1363 | if (!ndevs[ndev_idx]) | |
1364 | break; | |
1365 | ||
1366 | if (ndev_idx >= ARRAY_SIZE(ndevs)) { | |
1367 | dev_err(&pdev->dev, "no free tty range for this card left\n"); | |
1368 | ret = -EIO; | |
1369 | goto err; | |
1370 | } | |
1371 | ||
1372 | dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL); | |
1373 | if (unlikely(!dc)) { | |
1374 | dev_err(&pdev->dev, "Could not allocate memory\n"); | |
1375 | ret = -ENOMEM; | |
1376 | goto err_free; | |
1377 | } | |
1378 | ||
1379 | dc->pdev = pdev; | |
1380 | ||
1381 | ret = pci_enable_device(dc->pdev); | |
1382 | if (ret) { | |
1383 | dev_err(&pdev->dev, "Failed to enable PCI Device\n"); | |
1384 | goto err_free; | |
1385 | } | |
1386 | ||
1387 | ret = pci_request_regions(dc->pdev, NOZOMI_NAME); | |
1388 | if (ret) { | |
1389 | dev_err(&pdev->dev, "I/O address 0x%04x already in use\n", | |
1390 | (int) /* nozomi_private.io_addr */ 0); | |
1391 | goto err_disable_device; | |
1392 | } | |
1393 | ||
1394 | start = pci_resource_start(dc->pdev, 0); | |
1395 | if (start == 0) { | |
1396 | dev_err(&pdev->dev, "No I/O address for card detected\n"); | |
1397 | ret = -ENODEV; | |
1398 | goto err_rel_regs; | |
1399 | } | |
1400 | ||
1401 | /* Find out what card type it is */ | |
1402 | nozomi_get_card_type(dc); | |
1403 | ||
1404 | dc->base_addr = ioremap_nocache(start, dc->card_type); | |
1405 | if (!dc->base_addr) { | |
1406 | dev_err(&pdev->dev, "Unable to map card MMIO\n"); | |
1407 | ret = -ENODEV; | |
1408 | goto err_rel_regs; | |
1409 | } | |
1410 | ||
1411 | dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL); | |
1412 | if (!dc->send_buf) { | |
1413 | dev_err(&pdev->dev, "Could not allocate send buffer?\n"); | |
1414 | ret = -ENOMEM; | |
1415 | goto err_free_sbuf; | |
1416 | } | |
1417 | ||
1418 | for (i = PORT_MDM; i < MAX_PORT; i++) { | |
1419 | if (kfifo_alloc(&dc->port[i].fifo_ul, FIFO_BUFFER_SIZE_UL, | |
1420 | GFP_KERNEL)) { | |
1421 | dev_err(&pdev->dev, | |
1422 | "Could not allocate kfifo buffer\n"); | |
1423 | ret = -ENOMEM; | |
1424 | goto err_free_kfifo; | |
1425 | } | |
1426 | } | |
1427 | ||
1428 | spin_lock_init(&dc->spin_mutex); | |
1429 | ||
1430 | nozomi_setup_private_data(dc); | |
1431 | ||
1432 | /* Disable all interrupts */ | |
1433 | dc->last_ier = 0; | |
1434 | writew(dc->last_ier, dc->reg_ier); | |
1435 | ||
1436 | ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED, | |
1437 | NOZOMI_NAME, dc); | |
1438 | if (unlikely(ret)) { | |
1439 | dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq); | |
1440 | goto err_free_kfifo; | |
1441 | } | |
1442 | ||
1443 | DBG1("base_addr: %p", dc->base_addr); | |
1444 | ||
1445 | make_sysfs_files(dc); | |
1446 | ||
1447 | dc->index_start = ndev_idx * MAX_PORT; | |
1448 | ndevs[ndev_idx] = dc; | |
1449 | ||
1450 | pci_set_drvdata(pdev, dc); | |
1451 | ||
1452 | /* Enable RESET interrupt */ | |
1453 | dc->last_ier = RESET; | |
1454 | iowrite16(dc->last_ier, dc->reg_ier); | |
1455 | ||
1456 | dc->state = NOZOMI_STATE_ENABLED; | |
1457 | ||
1458 | for (i = 0; i < MAX_PORT; i++) { | |
1459 | struct device *tty_dev; | |
1460 | struct port *port = &dc->port[i]; | |
1461 | port->dc = dc; | |
1462 | tty_port_init(&port->port); | |
1463 | port->port.ops = &noz_tty_port_ops; | |
1464 | tty_dev = tty_port_register_device(&port->port, ntty_driver, | |
1465 | dc->index_start + i, &pdev->dev); | |
1466 | ||
1467 | if (IS_ERR(tty_dev)) { | |
1468 | ret = PTR_ERR(tty_dev); | |
1469 | dev_err(&pdev->dev, "Could not allocate tty?\n"); | |
1470 | tty_port_destroy(&port->port); | |
1471 | goto err_free_tty; | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | return 0; | |
1476 | ||
1477 | err_free_tty: | |
1478 | for (i = 0; i < MAX_PORT; ++i) { | |
1479 | tty_unregister_device(ntty_driver, dc->index_start + i); | |
1480 | tty_port_destroy(&dc->port[i].port); | |
1481 | } | |
1482 | err_free_kfifo: | |
1483 | for (i = 0; i < MAX_PORT; i++) | |
1484 | kfifo_free(&dc->port[i].fifo_ul); | |
1485 | err_free_sbuf: | |
1486 | kfree(dc->send_buf); | |
1487 | iounmap(dc->base_addr); | |
1488 | err_rel_regs: | |
1489 | pci_release_regions(pdev); | |
1490 | err_disable_device: | |
1491 | pci_disable_device(pdev); | |
1492 | err_free: | |
1493 | kfree(dc); | |
1494 | err: | |
1495 | return ret; | |
1496 | } | |
1497 | ||
1498 | static void tty_exit(struct nozomi *dc) | |
1499 | { | |
1500 | unsigned int i; | |
1501 | ||
1502 | DBG1(" "); | |
1503 | ||
1504 | for (i = 0; i < MAX_PORT; ++i) | |
1505 | tty_port_tty_hangup(&dc->port[i].port, false); | |
1506 | ||
1507 | /* Racy below - surely should wait for scheduled work to be done or | |
1508 | complete off a hangup method ? */ | |
1509 | while (dc->open_ttys) | |
1510 | msleep(1); | |
1511 | for (i = 0; i < MAX_PORT; ++i) { | |
1512 | tty_unregister_device(ntty_driver, dc->index_start + i); | |
1513 | tty_port_destroy(&dc->port[i].port); | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | /* Deallocate memory for one device */ | |
1518 | static void nozomi_card_exit(struct pci_dev *pdev) | |
1519 | { | |
1520 | int i; | |
1521 | struct ctrl_ul ctrl; | |
1522 | struct nozomi *dc = pci_get_drvdata(pdev); | |
1523 | ||
1524 | /* Disable all interrupts */ | |
1525 | dc->last_ier = 0; | |
1526 | writew(dc->last_ier, dc->reg_ier); | |
1527 | ||
1528 | tty_exit(dc); | |
1529 | ||
1530 | /* Send 0x0001, command card to resend the reset token. */ | |
1531 | /* This is to get the reset when the module is reloaded. */ | |
1532 | ctrl.port = 0x00; | |
1533 | ctrl.reserved = 0; | |
1534 | ctrl.RTS = 0; | |
1535 | ctrl.DTR = 1; | |
1536 | DBG1("sending flow control 0x%04X", *((u16 *)&ctrl)); | |
1537 | ||
1538 | /* Setup dc->reg addresses to we can use defines here */ | |
1539 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2); | |
1540 | writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */ | |
1541 | ||
1542 | remove_sysfs_files(dc); | |
1543 | ||
1544 | free_irq(pdev->irq, dc); | |
1545 | ||
1546 | for (i = 0; i < MAX_PORT; i++) | |
1547 | kfifo_free(&dc->port[i].fifo_ul); | |
1548 | ||
1549 | kfree(dc->send_buf); | |
1550 | ||
1551 | iounmap(dc->base_addr); | |
1552 | ||
1553 | pci_release_regions(pdev); | |
1554 | ||
1555 | pci_disable_device(pdev); | |
1556 | ||
1557 | ndevs[dc->index_start / MAX_PORT] = NULL; | |
1558 | ||
1559 | kfree(dc); | |
1560 | } | |
1561 | ||
1562 | static void set_rts(const struct tty_struct *tty, int rts) | |
1563 | { | |
1564 | struct port *port = get_port_by_tty(tty); | |
1565 | ||
1566 | port->ctrl_ul.RTS = rts; | |
1567 | port->update_flow_control = 1; | |
1568 | enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty)); | |
1569 | } | |
1570 | ||
1571 | static void set_dtr(const struct tty_struct *tty, int dtr) | |
1572 | { | |
1573 | struct port *port = get_port_by_tty(tty); | |
1574 | ||
1575 | DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr); | |
1576 | ||
1577 | port->ctrl_ul.DTR = dtr; | |
1578 | port->update_flow_control = 1; | |
1579 | enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty)); | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * ---------------------------------------------------------------------------- | |
1584 | * TTY code | |
1585 | * ---------------------------------------------------------------------------- | |
1586 | */ | |
1587 | ||
1588 | static int ntty_install(struct tty_driver *driver, struct tty_struct *tty) | |
1589 | { | |
1590 | struct port *port = get_port_by_tty(tty); | |
1591 | struct nozomi *dc = get_dc_by_tty(tty); | |
1592 | int ret; | |
1593 | if (!port || !dc || dc->state != NOZOMI_STATE_READY) | |
1594 | return -ENODEV; | |
1595 | ret = tty_standard_install(driver, tty); | |
1596 | if (ret == 0) | |
1597 | tty->driver_data = port; | |
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | static void ntty_cleanup(struct tty_struct *tty) | |
1602 | { | |
1603 | tty->driver_data = NULL; | |
1604 | } | |
1605 | ||
1606 | static int ntty_activate(struct tty_port *tport, struct tty_struct *tty) | |
1607 | { | |
1608 | struct port *port = container_of(tport, struct port, port); | |
1609 | struct nozomi *dc = port->dc; | |
1610 | unsigned long flags; | |
1611 | ||
1612 | DBG1("open: %d", port->token_dl); | |
1613 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1614 | dc->last_ier = dc->last_ier | port->token_dl; | |
1615 | writew(dc->last_ier, dc->reg_ier); | |
1616 | dc->open_ttys++; | |
1617 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1618 | printk("noz: activated %d: %p\n", tty->index, tport); | |
1619 | return 0; | |
1620 | } | |
1621 | ||
1622 | static int ntty_open(struct tty_struct *tty, struct file *filp) | |
1623 | { | |
1624 | struct port *port = tty->driver_data; | |
1625 | return tty_port_open(&port->port, tty, filp); | |
1626 | } | |
1627 | ||
1628 | static void ntty_shutdown(struct tty_port *tport) | |
1629 | { | |
1630 | struct port *port = container_of(tport, struct port, port); | |
1631 | struct nozomi *dc = port->dc; | |
1632 | unsigned long flags; | |
1633 | ||
1634 | DBG1("close: %d", port->token_dl); | |
1635 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1636 | dc->last_ier &= ~(port->token_dl); | |
1637 | writew(dc->last_ier, dc->reg_ier); | |
1638 | dc->open_ttys--; | |
1639 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1640 | printk("noz: shutdown %p\n", tport); | |
1641 | } | |
1642 | ||
1643 | static void ntty_close(struct tty_struct *tty, struct file *filp) | |
1644 | { | |
1645 | struct port *port = tty->driver_data; | |
1646 | if (port) | |
1647 | tty_port_close(&port->port, tty, filp); | |
1648 | } | |
1649 | ||
1650 | static void ntty_hangup(struct tty_struct *tty) | |
1651 | { | |
1652 | struct port *port = tty->driver_data; | |
1653 | tty_port_hangup(&port->port); | |
1654 | } | |
1655 | ||
1656 | /* | |
1657 | * called when the userspace process writes to the tty (/dev/noz*). | |
1658 | * Data is inserted into a fifo, which is then read and transferred to the modem. | |
1659 | */ | |
1660 | static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, | |
1661 | int count) | |
1662 | { | |
1663 | int rval = -EINVAL; | |
1664 | struct nozomi *dc = get_dc_by_tty(tty); | |
1665 | struct port *port = tty->driver_data; | |
1666 | unsigned long flags; | |
1667 | ||
1668 | /* DBG1( "WRITEx: %d, index = %d", count, index); */ | |
1669 | ||
1670 | if (!dc || !port) | |
1671 | return -ENODEV; | |
1672 | ||
1673 | rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count); | |
1674 | ||
1675 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1676 | /* CTS is only valid on the modem channel */ | |
1677 | if (port == &(dc->port[PORT_MDM])) { | |
1678 | if (port->ctrl_dl.CTS) { | |
1679 | DBG4("Enable interrupt"); | |
1680 | enable_transmit_ul(tty->index % MAX_PORT, dc); | |
1681 | } else { | |
1682 | dev_err(&dc->pdev->dev, | |
1683 | "CTS not active on modem port?\n"); | |
1684 | } | |
1685 | } else { | |
1686 | enable_transmit_ul(tty->index % MAX_PORT, dc); | |
1687 | } | |
1688 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1689 | ||
1690 | return rval; | |
1691 | } | |
1692 | ||
1693 | /* | |
1694 | * Calculate how much is left in device | |
1695 | * This method is called by the upper tty layer. | |
1696 | * #according to sources N_TTY.c it expects a value >= 0 and | |
1697 | * does not check for negative values. | |
1698 | * | |
1699 | * If the port is unplugged report lots of room and let the bits | |
1700 | * dribble away so we don't block anything. | |
1701 | */ | |
1702 | static int ntty_write_room(struct tty_struct *tty) | |
1703 | { | |
1704 | struct port *port = tty->driver_data; | |
1705 | int room = 4096; | |
1706 | const struct nozomi *dc = get_dc_by_tty(tty); | |
1707 | ||
1708 | if (dc) | |
1709 | room = kfifo_avail(&port->fifo_ul); | |
1710 | ||
1711 | return room; | |
1712 | } | |
1713 | ||
1714 | /* Gets io control parameters */ | |
1715 | static int ntty_tiocmget(struct tty_struct *tty) | |
1716 | { | |
1717 | const struct port *port = tty->driver_data; | |
1718 | const struct ctrl_dl *ctrl_dl = &port->ctrl_dl; | |
1719 | const struct ctrl_ul *ctrl_ul = &port->ctrl_ul; | |
1720 | ||
1721 | /* Note: these could change under us but it is not clear this | |
1722 | matters if so */ | |
1723 | return (ctrl_ul->RTS ? TIOCM_RTS : 0) | | |
1724 | (ctrl_ul->DTR ? TIOCM_DTR : 0) | | |
1725 | (ctrl_dl->DCD ? TIOCM_CAR : 0) | | |
1726 | (ctrl_dl->RI ? TIOCM_RNG : 0) | | |
1727 | (ctrl_dl->DSR ? TIOCM_DSR : 0) | | |
1728 | (ctrl_dl->CTS ? TIOCM_CTS : 0); | |
1729 | } | |
1730 | ||
1731 | /* Sets io controls parameters */ | |
1732 | static int ntty_tiocmset(struct tty_struct *tty, | |
1733 | unsigned int set, unsigned int clear) | |
1734 | { | |
1735 | struct nozomi *dc = get_dc_by_tty(tty); | |
1736 | unsigned long flags; | |
1737 | ||
1738 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1739 | if (set & TIOCM_RTS) | |
1740 | set_rts(tty, 1); | |
1741 | else if (clear & TIOCM_RTS) | |
1742 | set_rts(tty, 0); | |
1743 | ||
1744 | if (set & TIOCM_DTR) | |
1745 | set_dtr(tty, 1); | |
1746 | else if (clear & TIOCM_DTR) | |
1747 | set_dtr(tty, 0); | |
1748 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1749 | ||
1750 | return 0; | |
1751 | } | |
1752 | ||
1753 | static int ntty_cflags_changed(struct port *port, unsigned long flags, | |
1754 | struct async_icount *cprev) | |
1755 | { | |
1756 | const struct async_icount cnow = port->tty_icount; | |
1757 | int ret; | |
1758 | ||
1759 | ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) || | |
1760 | ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || | |
1761 | ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || | |
1762 | ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts)); | |
1763 | ||
1764 | *cprev = cnow; | |
1765 | ||
1766 | return ret; | |
1767 | } | |
1768 | ||
1769 | static int ntty_tiocgicount(struct tty_struct *tty, | |
1770 | struct serial_icounter_struct *icount) | |
1771 | { | |
1772 | struct port *port = tty->driver_data; | |
1773 | const struct async_icount cnow = port->tty_icount; | |
1774 | ||
1775 | icount->cts = cnow.cts; | |
1776 | icount->dsr = cnow.dsr; | |
1777 | icount->rng = cnow.rng; | |
1778 | icount->dcd = cnow.dcd; | |
1779 | icount->rx = cnow.rx; | |
1780 | icount->tx = cnow.tx; | |
1781 | icount->frame = cnow.frame; | |
1782 | icount->overrun = cnow.overrun; | |
1783 | icount->parity = cnow.parity; | |
1784 | icount->brk = cnow.brk; | |
1785 | icount->buf_overrun = cnow.buf_overrun; | |
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | static int ntty_ioctl(struct tty_struct *tty, | |
1790 | unsigned int cmd, unsigned long arg) | |
1791 | { | |
1792 | struct port *port = tty->driver_data; | |
1793 | int rval = -ENOIOCTLCMD; | |
1794 | ||
1795 | DBG1("******** IOCTL, cmd: %d", cmd); | |
1796 | ||
1797 | switch (cmd) { | |
1798 | case TIOCMIWAIT: { | |
1799 | struct async_icount cprev = port->tty_icount; | |
1800 | ||
1801 | rval = wait_event_interruptible(port->tty_wait, | |
1802 | ntty_cflags_changed(port, arg, &cprev)); | |
1803 | break; | |
1804 | } | |
1805 | default: | |
1806 | DBG1("ERR: 0x%08X, %d", cmd, cmd); | |
1807 | break; | |
1808 | } | |
1809 | ||
1810 | return rval; | |
1811 | } | |
1812 | ||
1813 | /* | |
1814 | * Called by the upper tty layer when tty buffers are ready | |
1815 | * to receive data again after a call to throttle. | |
1816 | */ | |
1817 | static void ntty_unthrottle(struct tty_struct *tty) | |
1818 | { | |
1819 | struct nozomi *dc = get_dc_by_tty(tty); | |
1820 | unsigned long flags; | |
1821 | ||
1822 | DBG1("UNTHROTTLE"); | |
1823 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1824 | enable_transmit_dl(tty->index % MAX_PORT, dc); | |
1825 | set_rts(tty, 1); | |
1826 | ||
1827 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * Called by the upper tty layer when the tty buffers are almost full. | |
1832 | * The driver should stop send more data. | |
1833 | */ | |
1834 | static void ntty_throttle(struct tty_struct *tty) | |
1835 | { | |
1836 | struct nozomi *dc = get_dc_by_tty(tty); | |
1837 | unsigned long flags; | |
1838 | ||
1839 | DBG1("THROTTLE"); | |
1840 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1841 | set_rts(tty, 0); | |
1842 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1843 | } | |
1844 | ||
1845 | /* Returns number of chars in buffer, called by tty layer */ | |
1846 | static s32 ntty_chars_in_buffer(struct tty_struct *tty) | |
1847 | { | |
1848 | struct port *port = tty->driver_data; | |
1849 | struct nozomi *dc = get_dc_by_tty(tty); | |
1850 | s32 rval = 0; | |
1851 | ||
1852 | if (unlikely(!dc || !port)) { | |
1853 | goto exit_in_buffer; | |
1854 | } | |
1855 | ||
1856 | rval = kfifo_len(&port->fifo_ul); | |
1857 | ||
1858 | exit_in_buffer: | |
1859 | return rval; | |
1860 | } | |
1861 | ||
1862 | static const struct tty_port_operations noz_tty_port_ops = { | |
1863 | .activate = ntty_activate, | |
1864 | .shutdown = ntty_shutdown, | |
1865 | }; | |
1866 | ||
1867 | static const struct tty_operations tty_ops = { | |
1868 | .ioctl = ntty_ioctl, | |
1869 | .open = ntty_open, | |
1870 | .close = ntty_close, | |
1871 | .hangup = ntty_hangup, | |
1872 | .write = ntty_write, | |
1873 | .write_room = ntty_write_room, | |
1874 | .unthrottle = ntty_unthrottle, | |
1875 | .throttle = ntty_throttle, | |
1876 | .chars_in_buffer = ntty_chars_in_buffer, | |
1877 | .tiocmget = ntty_tiocmget, | |
1878 | .tiocmset = ntty_tiocmset, | |
1879 | .get_icount = ntty_tiocgicount, | |
1880 | .install = ntty_install, | |
1881 | .cleanup = ntty_cleanup, | |
1882 | }; | |
1883 | ||
1884 | /* Module initialization */ | |
1885 | static struct pci_driver nozomi_driver = { | |
1886 | .name = NOZOMI_NAME, | |
1887 | .id_table = nozomi_pci_tbl, | |
1888 | .probe = nozomi_card_init, | |
1889 | .remove = nozomi_card_exit, | |
1890 | }; | |
1891 | ||
1892 | static __init int nozomi_init(void) | |
1893 | { | |
1894 | int ret; | |
1895 | ||
1896 | printk(KERN_INFO "Initializing %s\n", VERSION_STRING); | |
1897 | ||
1898 | ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS); | |
1899 | if (!ntty_driver) | |
1900 | return -ENOMEM; | |
1901 | ||
1902 | ntty_driver->driver_name = NOZOMI_NAME_TTY; | |
1903 | ntty_driver->name = "noz"; | |
1904 | ntty_driver->major = 0; | |
1905 | ntty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1906 | ntty_driver->subtype = SERIAL_TYPE_NORMAL; | |
1907 | ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
1908 | ntty_driver->init_termios = tty_std_termios; | |
1909 | ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \ | |
1910 | HUPCL | CLOCAL; | |
1911 | ntty_driver->init_termios.c_ispeed = 115200; | |
1912 | ntty_driver->init_termios.c_ospeed = 115200; | |
1913 | tty_set_operations(ntty_driver, &tty_ops); | |
1914 | ||
1915 | ret = tty_register_driver(ntty_driver); | |
1916 | if (ret) { | |
1917 | printk(KERN_ERR "Nozomi: failed to register ntty driver\n"); | |
1918 | goto free_tty; | |
1919 | } | |
1920 | ||
1921 | ret = pci_register_driver(&nozomi_driver); | |
1922 | if (ret) { | |
1923 | printk(KERN_ERR "Nozomi: can't register pci driver\n"); | |
1924 | goto unr_tty; | |
1925 | } | |
1926 | ||
1927 | return 0; | |
1928 | unr_tty: | |
1929 | tty_unregister_driver(ntty_driver); | |
1930 | free_tty: | |
1931 | put_tty_driver(ntty_driver); | |
1932 | return ret; | |
1933 | } | |
1934 | ||
1935 | static __exit void nozomi_exit(void) | |
1936 | { | |
1937 | printk(KERN_INFO "Unloading %s\n", DRIVER_DESC); | |
1938 | pci_unregister_driver(&nozomi_driver); | |
1939 | tty_unregister_driver(ntty_driver); | |
1940 | put_tty_driver(ntty_driver); | |
1941 | } | |
1942 | ||
1943 | module_init(nozomi_init); | |
1944 | module_exit(nozomi_exit); | |
1945 | ||
1946 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
1947 | ||
1948 | MODULE_LICENSE("Dual BSD/GPL"); | |
1949 | MODULE_DESCRIPTION(DRIVER_DESC); |