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20fd1e3b FS |
1 | /* |
2 | * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter | |
3 | * | |
4 | * Written by: Ulf Jakobsson, | |
e9ed537a | 5 | * Jan Ã…kerfeldt, |
20fd1e3b FS |
6 | * Stefan Thomasson, |
7 | * | |
8 | * Maintained by: Paul Hardwick (p.hardwick@option.com) | |
9 | * | |
10 | * Patches: | |
11 | * Locking code changes for Vodafone by Sphere Systems Ltd, | |
12 | * Andrew Bird (ajb@spheresystems.co.uk ) | |
13 | * & Phil Sanderson | |
14 | * | |
15 | * Source has been ported from an implementation made by Filip Aben @ Option | |
16 | * | |
17 | * -------------------------------------------------------------------------- | |
18 | * | |
19 | * Copyright (c) 2005,2006 Option Wireless Sweden AB | |
20 | * Copyright (c) 2006 Sphere Systems Ltd | |
21 | * Copyright (c) 2006 Option Wireless n/v | |
22 | * All rights Reserved. | |
23 | * | |
24 | * This program is free software; you can redistribute it and/or modify | |
25 | * it under the terms of the GNU General Public License as published by | |
26 | * the Free Software Foundation; either version 2 of the License, or | |
27 | * (at your option) any later version. | |
28 | * | |
29 | * This program is distributed in the hope that it will be useful, | |
30 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
31 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
32 | * GNU General Public License for more details. | |
33 | * | |
34 | * You should have received a copy of the GNU General Public License | |
35 | * along with this program; if not, write to the Free Software | |
36 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
37 | * | |
38 | * -------------------------------------------------------------------------- | |
39 | */ | |
40 | ||
20fd1e3b FS |
41 | /* Enable this to have a lot of debug printouts */ |
42 | #define DEBUG | |
43 | ||
44 | #include <linux/kernel.h> | |
45 | #include <linux/module.h> | |
46 | #include <linux/pci.h> | |
47 | #include <linux/ioport.h> | |
48 | #include <linux/tty.h> | |
49 | #include <linux/tty_driver.h> | |
50 | #include <linux/tty_flip.h> | |
d43c36dc | 51 | #include <linux/sched.h> |
20fd1e3b FS |
52 | #include <linux/serial.h> |
53 | #include <linux/interrupt.h> | |
54 | #include <linux/kmod.h> | |
55 | #include <linux/init.h> | |
56 | #include <linux/kfifo.h> | |
57 | #include <linux/uaccess.h> | |
5a0e3ad6 | 58 | #include <linux/slab.h> |
20fd1e3b FS |
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__, \ | |
bf9d8929 | 78 | __func__, tmp); \ |
20fd1e3b FS |
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 | ||
e9ed537a FS |
94 | #define D(lvl, args...) do \ |
95 | {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \ | |
96 | while (0) | |
20fd1e3b FS |
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 | ||
20fd1e3b FS |
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 | ||
661b4e89 FS |
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 | ||
20fd1e3b FS |
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 { | |
e9ed537a | 229 | unsigned int enabled:5; /* |
20fd1e3b FS |
230 | * Toggle fields are valid if enabled is 0, |
231 | * else A-channels must always be used. | |
232 | */ | |
e9ed537a FS |
233 | unsigned int diag_dl:1; |
234 | unsigned int mdm_dl:1; | |
235 | unsigned int mdm_ul:1; | |
20fd1e3b FS |
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; | |
e9ed537a FS |
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; | |
20fd1e3b FS |
281 | } __attribute__ ((packed)); |
282 | ||
283 | /* This stores all control uplink flags */ | |
284 | struct ctrl_ul { | |
285 | u8 port; | |
e9ed537a FS |
286 | unsigned int reserved:6; |
287 | unsigned int RTS:1; | |
288 | unsigned int DTR:1; | |
20fd1e3b FS |
289 | } __attribute__ ((packed)); |
290 | ||
291 | #else | |
292 | /* Little endian */ | |
293 | ||
294 | /* This represents the toggle information */ | |
295 | struct toggles { | |
e9ed537a FS |
296 | unsigned int mdm_ul:1; |
297 | unsigned int mdm_dl:1; | |
298 | unsigned int diag_dl:1; | |
299 | unsigned int enabled:5; /* | |
20fd1e3b FS |
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 { | |
e9ed537a FS |
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; | |
20fd1e3b FS |
340 | u8 port; |
341 | } __attribute__ ((packed)); | |
342 | ||
343 | /* This stores all control uplink flags */ | |
344 | struct ctrl_ul { | |
e9ed537a FS |
345 | unsigned int DTR:1; |
346 | unsigned int RTS:1; | |
347 | unsigned int reserved:6; | |
20fd1e3b FS |
348 | u8 port; |
349 | } __attribute__ ((packed)); | |
350 | #endif | |
351 | ||
352 | /* This holds all information that is needed regarding a port */ | |
353 | struct port { | |
33dd474a | 354 | struct tty_port port; |
20fd1e3b FS |
355 | u8 update_flow_control; |
356 | struct ctrl_ul ctrl_ul; | |
357 | struct ctrl_dl ctrl_dl; | |
45465487 | 358 | struct kfifo fifo_ul; |
20fd1e3b FS |
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 | ||
20fd1e3b FS |
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; | |
266794eb AC |
371 | |
372 | struct nozomi *dc; | |
20fd1e3b FS |
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; | |
661b4e89 | 395 | enum card_state state; |
20fd1e3b FS |
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 */ | |
18bbe0c2 | 406 | static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = { |
b2a3dbc3 | 407 | {PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */ |
20fd1e3b FS |
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 | ||
266794eb AC |
416 | static const struct tty_port_operations noz_tty_port_ops; |
417 | ||
20fd1e3b FS |
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; | |
782a6de4 | 442 | const u32 __iomem *ptr = mem_addr_start; |
20fd1e3b FS |
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; | |
782a6de4 | 452 | *buf16 = __le16_to_cpu(readw(ptr)); |
20fd1e3b FS |
453 | goto out; |
454 | break; | |
455 | case 4: /* 4 bytes */ | |
782a6de4 | 456 | *(buf) = __le32_to_cpu(readl(ptr)); |
20fd1e3b FS |
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; | |
782a6de4 | 465 | *(buf16) = __le16_to_cpu(readw(ptr)); |
20fd1e3b FS |
466 | i += 2; |
467 | } else { | |
468 | /* Read 4 bytes */ | |
782a6de4 | 469 | *(buf) = __le32_to_cpu(readl(ptr)); |
20fd1e3b FS |
470 | i += 4; |
471 | } | |
472 | buf++; | |
473 | ptr++; | |
474 | } | |
475 | out: | |
476 | return; | |
477 | } | |
478 | ||
479 | /* | |
480 | * TODO: | |
481 | * -Optimize | |
482 | * -Rewrite cleaner | |
483 | */ | |
71e1b4ab | 484 | static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf, |
20fd1e3b FS |
485 | u32 size_bytes) |
486 | { | |
487 | u32 i = 0; | |
782a6de4 | 488 | u32 __iomem *ptr = mem_addr_start; |
71e1b4ab | 489 | const u16 *buf16; |
20fd1e3b FS |
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 */ | |
71e1b4ab | 497 | buf16 = (const u16 *)buf; |
782a6de4 | 498 | writew(__cpu_to_le16(*buf16), ptr); |
20fd1e3b FS |
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 */ | |
782a6de4 | 506 | writel(__cpu_to_le32(*buf), ptr); |
20fd1e3b FS |
507 | return 4; |
508 | break; | |
509 | } | |
510 | ||
511 | while (i < size_bytes) { | |
512 | if (size_bytes - i == 2) { | |
513 | /* 2 bytes */ | |
71e1b4ab | 514 | buf16 = (const u16 *)buf; |
782a6de4 | 515 | writew(__cpu_to_le16(*buf16), ptr); |
20fd1e3b FS |
516 | i += 2; |
517 | } else { | |
518 | /* 4 bytes */ | |
782a6de4 | 519 | writel(__cpu_to_le32(*buf), ptr); |
20fd1e3b FS |
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 | |
e9ed537a | 654 | static inline void dump_table(const struct nozomi *dc) { } |
20fd1e3b FS |
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++) { | |
20fd1e3b FS |
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 | ||
661b4e89 | 697 | dc->state = NOZOMI_STATE_ALLOCATED; |
20fd1e3b FS |
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 | { | |
71e1b4ab | 735 | static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL}; |
20fd1e3b FS |
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 | { | |
71e1b4ab JE |
748 | static const u16 mask[] = |
749 | {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL}; | |
20fd1e3b FS |
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 | { | |
71e1b4ab | 762 | static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL}; |
20fd1e3b FS |
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 | { | |
71e1b4ab JE |
775 | static const u16 mask[] = |
776 | {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL}; | |
20fd1e3b FS |
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 | */ | |
33dd474a | 790 | static int send_data(enum port_type index, struct nozomi *dc) |
20fd1e3b FS |
791 | { |
792 | u32 size = 0; | |
33dd474a | 793 | struct port *port = &dc->port[index]; |
18bbe0c2 | 794 | const u8 toggle = port->toggle_ul; |
20fd1e3b | 795 | void __iomem *addr = port->ul_addr[toggle]; |
18bbe0c2 | 796 | const u32 ul_size = port->ul_size[toggle]; |
33dd474a | 797 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
20fd1e3b FS |
798 | |
799 | /* Get data from tty and place in buf for now */ | |
7acd72eb | 800 | size = kfifo_out(&port->fifo_ul, dc->send_buf, |
20fd1e3b FS |
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:"); | |
33dd474a | 805 | tty_kref_put(tty); |
20fd1e3b FS |
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 | ||
33dd474a | 818 | tty_kref_put(tty); |
20fd1e3b FS |
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]; | |
33dd474a | 830 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
9237a81a | 831 | int i, ret; |
20fd1e3b FS |
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); | |
9237a81a JS |
847 | ret = 0; |
848 | goto put; | |
20fd1e3b FS |
849 | } |
850 | ||
851 | if (unlikely(size == 0)) { | |
852 | dev_err(&dc->pdev->dev, "size == 0?\n"); | |
9237a81a JS |
853 | ret = 1; |
854 | goto put; | |
20fd1e3b FS |
855 | } |
856 | ||
20fd1e3b FS |
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); | |
9237a81a JS |
874 | ret = 1; |
875 | put: | |
33dd474a | 876 | tty_kref_put(tty); |
9237a81a | 877 | return ret; |
20fd1e3b FS |
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; | |
661b4e89 FS |
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 | } | |
20fd1e3b FS |
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 | ||
e64c026d | 988 | if (kfifo_len(&dc->port[port].fifo_ul)) { |
20fd1e3b FS |
989 | DBG1("Enable interrupt (0x%04X) on port: %d", |
990 | enable_ier, port); | |
991 | DBG1("Data in buffer [%d], enable transmit! ", | |
e64c026d | 992 | kfifo_len(&dc->port[port].fifo_ul)); |
20fd1e3b FS |
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 | /* | |
e9ed537a | 1071 | * Handle downlink data, ports that are handled are modem and diagnostics |
20fd1e3b FS |
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); | |
33dd474a AC |
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 | } | |
20fd1e3b FS |
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 | { | |
71e1b4ab | 1334 | const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); |
20fd1e3b FS |
1335 | |
1336 | return sprintf(buf, "%d\n", dc->card_type); | |
1337 | } | |
e9ed537a | 1338 | static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL); |
20fd1e3b FS |
1339 | |
1340 | static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr, | |
1341 | char *buf) | |
1342 | { | |
71e1b4ab | 1343 | const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); |
20fd1e3b FS |
1344 | |
1345 | return sprintf(buf, "%u\n", dc->open_ttys); | |
1346 | } | |
e9ed537a | 1347 | static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL); |
20fd1e3b FS |
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 | ||
20fd1e3b FS |
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 | ||
20fd1e3b FS |
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 | ||
661b4e89 FS |
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 | ||
24cb2335 | 1419 | dc->base_addr = ioremap_nocache(start, dc->card_type); |
20fd1e3b FS |
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 | ||
9842c38e SS |
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 | ||
20fd1e3b FS |
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); | |
9842c38e | 1455 | goto err_free_kfifo; |
20fd1e3b FS |
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 | ||
661b4e89 FS |
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 | ||
20fd1e3b | 1473 | for (i = 0; i < MAX_PORT; i++) { |
9842c38e | 1474 | struct device *tty_dev; |
266794eb AC |
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; | |
9842c38e | 1480 | tty_dev = tty_register_device(ntty_driver, dc->index_start + i, |
20fd1e3b | 1481 | &pdev->dev); |
9842c38e SS |
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 | } | |
20fd1e3b | 1488 | } |
9842c38e | 1489 | |
20fd1e3b FS |
1490 | return 0; |
1491 | ||
9842c38e SS |
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); | |
20fd1e3b FS |
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 | ||
33dd474a AC |
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 ? */ | |
20fd1e3b FS |
1527 | while (dc->open_ttys) |
1528 | msleep(1); | |
20fd1e3b FS |
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++) | |
45465487 | 1563 | kfifo_free(&dc->port[i].fifo_ul); |
20fd1e3b FS |
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 | ||
266794eb | 1604 | static int ntty_install(struct tty_driver *driver, struct tty_struct *tty) |
20fd1e3b FS |
1605 | { |
1606 | struct port *port = get_port_by_tty(tty); | |
1607 | struct nozomi *dc = get_dc_by_tty(tty); | |
266794eb | 1608 | int ret; |
661b4e89 | 1609 | if (!port || !dc || dc->state != NOZOMI_STATE_READY) |
20fd1e3b | 1610 | return -ENODEV; |
266794eb AC |
1611 | ret = tty_init_termios(tty); |
1612 | if (ret == 0) { | |
1613 | tty_driver_kref_get(driver); | |
ee78bb95 | 1614 | tty->count++; |
266794eb | 1615 | driver->ttys[tty->index] = tty; |
20fd1e3b | 1616 | } |
266794eb | 1617 | return ret; |
20fd1e3b FS |
1618 | } |
1619 | ||
266794eb AC |
1620 | static void ntty_cleanup(struct tty_struct *tty) |
1621 | { | |
1622 | tty->driver_data = NULL; | |
1623 | } | |
716da631 | 1624 | |
266794eb | 1625 | static int ntty_activate(struct tty_port *tport, struct tty_struct *tty) |
20fd1e3b | 1626 | { |
266794eb AC |
1627 | struct port *port = container_of(tport, struct port, port); |
1628 | struct nozomi *dc = port->dc; | |
20fd1e3b FS |
1629 | unsigned long flags; |
1630 | ||
266794eb AC |
1631 | DBG1("open: %d", port->token_dl); |
1632 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1633 | dc->last_ier = dc->last_ier | port->token_dl; | |
1634 | writew(dc->last_ier, dc->reg_ier); | |
1635 | dc->open_ttys++; | |
1636 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1637 | printk("noz: activated %d: %p\n", tty->index, tport); | |
1638 | return 0; | |
1639 | } | |
20fd1e3b | 1640 | |
266794eb AC |
1641 | static int ntty_open(struct tty_struct *tty, struct file *filp) |
1642 | { | |
1643 | struct port *port = get_port_by_tty(tty); | |
1644 | return tty_port_open(&port->port, tty, filp); | |
1645 | } | |
20fd1e3b | 1646 | |
266794eb AC |
1647 | static void ntty_shutdown(struct tty_port *tport) |
1648 | { | |
1649 | struct port *port = container_of(tport, struct port, port); | |
1650 | struct nozomi *dc = port->dc; | |
1651 | unsigned long flags; | |
20fd1e3b | 1652 | |
266794eb AC |
1653 | DBG1("close: %d", port->token_dl); |
1654 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1655 | dc->last_ier &= ~(port->token_dl); | |
1656 | writew(dc->last_ier, dc->reg_ier); | |
20fd1e3b | 1657 | dc->open_ttys--; |
266794eb AC |
1658 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
1659 | printk("noz: shutdown %p\n", tport); | |
1660 | } | |
20fd1e3b | 1661 | |
266794eb AC |
1662 | static void ntty_close(struct tty_struct *tty, struct file *filp) |
1663 | { | |
1664 | struct port *port = tty->driver_data; | |
1665 | if (port) | |
1666 | tty_port_close(&port->port, tty, filp); | |
1667 | } | |
1668 | ||
1669 | static void ntty_hangup(struct tty_struct *tty) | |
1670 | { | |
1671 | struct port *port = tty->driver_data; | |
1672 | tty_port_hangup(&port->port); | |
20fd1e3b FS |
1673 | } |
1674 | ||
1675 | /* | |
1676 | * called when the userspace process writes to the tty (/dev/noz*). | |
1677 | * Data is inserted into a fifo, which is then read and transfered to the modem. | |
1678 | */ | |
1679 | static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, | |
1680 | int count) | |
1681 | { | |
1682 | int rval = -EINVAL; | |
1683 | struct nozomi *dc = get_dc_by_tty(tty); | |
1684 | struct port *port = tty->driver_data; | |
1685 | unsigned long flags; | |
1686 | ||
1687 | /* DBG1( "WRITEx: %d, index = %d", count, index); */ | |
1688 | ||
1689 | if (!dc || !port) | |
1690 | return -ENODEV; | |
1691 | ||
e8c65d14 | 1692 | mutex_lock(&port->tty_sem); |
20fd1e3b | 1693 | |
33dd474a | 1694 | if (unlikely(!port->port.count)) { |
20fd1e3b FS |
1695 | DBG1(" "); |
1696 | goto exit; | |
1697 | } | |
1698 | ||
7acd72eb | 1699 | rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count); |
20fd1e3b FS |
1700 | |
1701 | /* notify card */ | |
1702 | if (unlikely(dc == NULL)) { | |
1703 | DBG1("No device context?"); | |
1704 | goto exit; | |
1705 | } | |
1706 | ||
1707 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1708 | /* CTS is only valid on the modem channel */ | |
1709 | if (port == &(dc->port[PORT_MDM])) { | |
1710 | if (port->ctrl_dl.CTS) { | |
1711 | DBG4("Enable interrupt"); | |
1712 | enable_transmit_ul(tty->index % MAX_PORT, dc); | |
1713 | } else { | |
1714 | dev_err(&dc->pdev->dev, | |
1715 | "CTS not active on modem port?\n"); | |
1716 | } | |
1717 | } else { | |
1718 | enable_transmit_ul(tty->index % MAX_PORT, dc); | |
1719 | } | |
1720 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1721 | ||
1722 | exit: | |
1723 | mutex_unlock(&port->tty_sem); | |
1724 | return rval; | |
1725 | } | |
1726 | ||
1727 | /* | |
1728 | * Calculate how much is left in device | |
1729 | * This method is called by the upper tty layer. | |
1730 | * #according to sources N_TTY.c it expects a value >= 0 and | |
1731 | * does not check for negative values. | |
e8c65d14 AC |
1732 | * |
1733 | * If the port is unplugged report lots of room and let the bits | |
1734 | * dribble away so we don't block anything. | |
20fd1e3b FS |
1735 | */ |
1736 | static int ntty_write_room(struct tty_struct *tty) | |
1737 | { | |
1738 | struct port *port = tty->driver_data; | |
e8c65d14 | 1739 | int room = 4096; |
71e1b4ab | 1740 | const struct nozomi *dc = get_dc_by_tty(tty); |
20fd1e3b | 1741 | |
e8c65d14 AC |
1742 | if (dc) { |
1743 | mutex_lock(&port->tty_sem); | |
1744 | if (port->port.count) | |
1745 | room = port->fifo_ul.size - | |
1746 | kfifo_len(&port->fifo_ul); | |
1747 | mutex_unlock(&port->tty_sem); | |
1748 | } | |
20fd1e3b FS |
1749 | return room; |
1750 | } | |
1751 | ||
1752 | /* Gets io control parameters */ | |
1753 | static int ntty_tiocmget(struct tty_struct *tty, struct file *file) | |
1754 | { | |
71e1b4ab JE |
1755 | const struct port *port = tty->driver_data; |
1756 | const struct ctrl_dl *ctrl_dl = &port->ctrl_dl; | |
1757 | const struct ctrl_ul *ctrl_ul = &port->ctrl_ul; | |
20fd1e3b | 1758 | |
978e595f AC |
1759 | /* Note: these could change under us but it is not clear this |
1760 | matters if so */ | |
20fd1e3b FS |
1761 | return (ctrl_ul->RTS ? TIOCM_RTS : 0) | |
1762 | (ctrl_ul->DTR ? TIOCM_DTR : 0) | | |
1763 | (ctrl_dl->DCD ? TIOCM_CAR : 0) | | |
1764 | (ctrl_dl->RI ? TIOCM_RNG : 0) | | |
1765 | (ctrl_dl->DSR ? TIOCM_DSR : 0) | | |
1766 | (ctrl_dl->CTS ? TIOCM_CTS : 0); | |
1767 | } | |
1768 | ||
1769 | /* Sets io controls parameters */ | |
1770 | static int ntty_tiocmset(struct tty_struct *tty, struct file *file, | |
1771 | unsigned int set, unsigned int clear) | |
1772 | { | |
661b4e89 FS |
1773 | struct nozomi *dc = get_dc_by_tty(tty); |
1774 | unsigned long flags; | |
1775 | ||
1776 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
20fd1e3b FS |
1777 | if (set & TIOCM_RTS) |
1778 | set_rts(tty, 1); | |
1779 | else if (clear & TIOCM_RTS) | |
1780 | set_rts(tty, 0); | |
1781 | ||
1782 | if (set & TIOCM_DTR) | |
1783 | set_dtr(tty, 1); | |
1784 | else if (clear & TIOCM_DTR) | |
1785 | set_dtr(tty, 0); | |
661b4e89 | 1786 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
20fd1e3b FS |
1787 | |
1788 | return 0; | |
1789 | } | |
1790 | ||
1791 | static int ntty_cflags_changed(struct port *port, unsigned long flags, | |
1792 | struct async_icount *cprev) | |
1793 | { | |
18bbe0c2 | 1794 | const struct async_icount cnow = port->tty_icount; |
20fd1e3b FS |
1795 | int ret; |
1796 | ||
1797 | ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) || | |
1798 | ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || | |
1799 | ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || | |
1800 | ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts)); | |
1801 | ||
1802 | *cprev = cnow; | |
1803 | ||
1804 | return ret; | |
1805 | } | |
1806 | ||
1807 | static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp) | |
1808 | { | |
18bbe0c2 | 1809 | const struct async_icount cnow = port->tty_icount; |
20fd1e3b FS |
1810 | struct serial_icounter_struct icount; |
1811 | ||
1812 | icount.cts = cnow.cts; | |
1813 | icount.dsr = cnow.dsr; | |
1814 | icount.rng = cnow.rng; | |
1815 | icount.dcd = cnow.dcd; | |
1816 | icount.rx = cnow.rx; | |
1817 | icount.tx = cnow.tx; | |
1818 | icount.frame = cnow.frame; | |
1819 | icount.overrun = cnow.overrun; | |
1820 | icount.parity = cnow.parity; | |
1821 | icount.brk = cnow.brk; | |
1822 | icount.buf_overrun = cnow.buf_overrun; | |
1823 | ||
661b4e89 | 1824 | return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0; |
20fd1e3b FS |
1825 | } |
1826 | ||
1827 | static int ntty_ioctl(struct tty_struct *tty, struct file *file, | |
1828 | unsigned int cmd, unsigned long arg) | |
1829 | { | |
1830 | struct port *port = tty->driver_data; | |
1831 | void __user *argp = (void __user *)arg; | |
1832 | int rval = -ENOIOCTLCMD; | |
1833 | ||
1834 | DBG1("******** IOCTL, cmd: %d", cmd); | |
1835 | ||
1836 | switch (cmd) { | |
1837 | case TIOCMIWAIT: { | |
1838 | struct async_icount cprev = port->tty_icount; | |
1839 | ||
1840 | rval = wait_event_interruptible(port->tty_wait, | |
1841 | ntty_cflags_changed(port, arg, &cprev)); | |
1842 | break; | |
1843 | } case TIOCGICOUNT: | |
1844 | rval = ntty_ioctl_tiocgicount(port, argp); | |
1845 | break; | |
1846 | default: | |
1847 | DBG1("ERR: 0x%08X, %d", cmd, cmd); | |
1848 | break; | |
1849 | }; | |
1850 | ||
1851 | return rval; | |
1852 | } | |
1853 | ||
1854 | /* | |
1855 | * Called by the upper tty layer when tty buffers are ready | |
1856 | * to receive data again after a call to throttle. | |
1857 | */ | |
1858 | static void ntty_unthrottle(struct tty_struct *tty) | |
1859 | { | |
1860 | struct nozomi *dc = get_dc_by_tty(tty); | |
1861 | unsigned long flags; | |
1862 | ||
1863 | DBG1("UNTHROTTLE"); | |
1864 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1865 | enable_transmit_dl(tty->index % MAX_PORT, dc); | |
1866 | set_rts(tty, 1); | |
1867 | ||
1868 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1869 | } | |
1870 | ||
1871 | /* | |
1872 | * Called by the upper tty layer when the tty buffers are almost full. | |
1873 | * The driver should stop send more data. | |
1874 | */ | |
1875 | static void ntty_throttle(struct tty_struct *tty) | |
1876 | { | |
1877 | struct nozomi *dc = get_dc_by_tty(tty); | |
1878 | unsigned long flags; | |
1879 | ||
1880 | DBG1("THROTTLE"); | |
1881 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1882 | set_rts(tty, 0); | |
1883 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1884 | } | |
1885 | ||
20fd1e3b FS |
1886 | /* Returns number of chars in buffer, called by tty layer */ |
1887 | static s32 ntty_chars_in_buffer(struct tty_struct *tty) | |
1888 | { | |
1889 | struct port *port = tty->driver_data; | |
1890 | struct nozomi *dc = get_dc_by_tty(tty); | |
23198fda | 1891 | s32 rval = 0; |
20fd1e3b FS |
1892 | |
1893 | if (unlikely(!dc || !port)) { | |
20fd1e3b FS |
1894 | goto exit_in_buffer; |
1895 | } | |
1896 | ||
33dd474a | 1897 | if (unlikely(!port->port.count)) { |
20fd1e3b | 1898 | dev_err(&dc->pdev->dev, "No tty open?\n"); |
20fd1e3b FS |
1899 | goto exit_in_buffer; |
1900 | } | |
1901 | ||
e64c026d | 1902 | rval = kfifo_len(&port->fifo_ul); |
20fd1e3b FS |
1903 | |
1904 | exit_in_buffer: | |
1905 | return rval; | |
1906 | } | |
1907 | ||
266794eb AC |
1908 | static const struct tty_port_operations noz_tty_port_ops = { |
1909 | .activate = ntty_activate, | |
1910 | .shutdown = ntty_shutdown, | |
1911 | }; | |
1912 | ||
18bbe0c2 | 1913 | static const struct tty_operations tty_ops = { |
20fd1e3b FS |
1914 | .ioctl = ntty_ioctl, |
1915 | .open = ntty_open, | |
1916 | .close = ntty_close, | |
266794eb | 1917 | .hangup = ntty_hangup, |
20fd1e3b FS |
1918 | .write = ntty_write, |
1919 | .write_room = ntty_write_room, | |
1920 | .unthrottle = ntty_unthrottle, | |
1921 | .throttle = ntty_throttle, | |
1922 | .chars_in_buffer = ntty_chars_in_buffer, | |
20fd1e3b FS |
1923 | .tiocmget = ntty_tiocmget, |
1924 | .tiocmset = ntty_tiocmset, | |
266794eb AC |
1925 | .install = ntty_install, |
1926 | .cleanup = ntty_cleanup, | |
20fd1e3b FS |
1927 | }; |
1928 | ||
1929 | /* Module initialization */ | |
1930 | static struct pci_driver nozomi_driver = { | |
1931 | .name = NOZOMI_NAME, | |
1932 | .id_table = nozomi_pci_tbl, | |
1933 | .probe = nozomi_card_init, | |
1934 | .remove = __devexit_p(nozomi_card_exit), | |
1935 | }; | |
1936 | ||
1937 | static __init int nozomi_init(void) | |
1938 | { | |
1939 | int ret; | |
1940 | ||
1941 | printk(KERN_INFO "Initializing %s\n", VERSION_STRING); | |
1942 | ||
1943 | ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS); | |
1944 | if (!ntty_driver) | |
1945 | return -ENOMEM; | |
1946 | ||
1947 | ntty_driver->owner = THIS_MODULE; | |
1948 | ntty_driver->driver_name = NOZOMI_NAME_TTY; | |
1949 | ntty_driver->name = "noz"; | |
1950 | ntty_driver->major = 0; | |
1951 | ntty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1952 | ntty_driver->subtype = SERIAL_TYPE_NORMAL; | |
1953 | ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
1954 | ntty_driver->init_termios = tty_std_termios; | |
1955 | ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \ | |
1956 | HUPCL | CLOCAL; | |
1957 | ntty_driver->init_termios.c_ispeed = 115200; | |
1958 | ntty_driver->init_termios.c_ospeed = 115200; | |
1959 | tty_set_operations(ntty_driver, &tty_ops); | |
1960 | ||
1961 | ret = tty_register_driver(ntty_driver); | |
1962 | if (ret) { | |
1963 | printk(KERN_ERR "Nozomi: failed to register ntty driver\n"); | |
1964 | goto free_tty; | |
1965 | } | |
1966 | ||
1967 | ret = pci_register_driver(&nozomi_driver); | |
1968 | if (ret) { | |
1969 | printk(KERN_ERR "Nozomi: can't register pci driver\n"); | |
1970 | goto unr_tty; | |
1971 | } | |
1972 | ||
1973 | return 0; | |
1974 | unr_tty: | |
1975 | tty_unregister_driver(ntty_driver); | |
1976 | free_tty: | |
1977 | put_tty_driver(ntty_driver); | |
1978 | return ret; | |
1979 | } | |
1980 | ||
1981 | static __exit void nozomi_exit(void) | |
1982 | { | |
1983 | printk(KERN_INFO "Unloading %s\n", DRIVER_DESC); | |
1984 | pci_unregister_driver(&nozomi_driver); | |
1985 | tty_unregister_driver(ntty_driver); | |
1986 | put_tty_driver(ntty_driver); | |
1987 | } | |
1988 | ||
1989 | module_init(nozomi_init); | |
1990 | module_exit(nozomi_exit); | |
1991 | ||
1992 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
1993 | ||
1994 | MODULE_LICENSE("Dual BSD/GPL"); | |
1995 | MODULE_DESCRIPTION(DRIVER_DESC); |