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