Commit | Line | Data |
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e3b3d0f5 | 1 | // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) |
20fd1e3b FS |
2 | /* |
3 | * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter | |
4 | * | |
5 | * Written by: Ulf Jakobsson, | |
e9ed537a | 6 | * Jan Ã…kerfeldt, |
20fd1e3b FS |
7 | * Stefan Thomasson, |
8 | * | |
9 | * Maintained by: Paul Hardwick (p.hardwick@option.com) | |
10 | * | |
11 | * Patches: | |
12 | * Locking code changes for Vodafone by Sphere Systems Ltd, | |
13 | * Andrew Bird (ajb@spheresystems.co.uk ) | |
14 | * & Phil Sanderson | |
15 | * | |
16 | * Source has been ported from an implementation made by Filip Aben @ Option | |
17 | * | |
18 | * -------------------------------------------------------------------------- | |
19 | * | |
20 | * Copyright (c) 2005,2006 Option Wireless Sweden AB | |
21 | * Copyright (c) 2006 Sphere Systems Ltd | |
22 | * Copyright (c) 2006 Option Wireless n/v | |
23 | * All rights Reserved. | |
24 | * | |
20fd1e3b FS |
25 | * -------------------------------------------------------------------------- |
26 | */ | |
27 | ||
20fd1e3b FS |
28 | /* Enable this to have a lot of debug printouts */ |
29 | #define DEBUG | |
30 | ||
31 | #include <linux/kernel.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/ioport.h> | |
35 | #include <linux/tty.h> | |
36 | #include <linux/tty_driver.h> | |
37 | #include <linux/tty_flip.h> | |
d43c36dc | 38 | #include <linux/sched.h> |
20fd1e3b FS |
39 | #include <linux/serial.h> |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/kmod.h> | |
42 | #include <linux/init.h> | |
43 | #include <linux/kfifo.h> | |
44 | #include <linux/uaccess.h> | |
5a0e3ad6 | 45 | #include <linux/slab.h> |
20fd1e3b FS |
46 | #include <asm/byteorder.h> |
47 | ||
48 | #include <linux/delay.h> | |
49 | ||
50 | ||
2cae8de7 | 51 | #define VERSION_STRING DRIVER_DESC " 2.1d" |
20fd1e3b | 52 | |
20fd1e3b FS |
53 | /* Default debug printout level */ |
54 | #define NOZOMI_DEBUG_LEVEL 0x00 | |
20fd1e3b | 55 | static int debug = NOZOMI_DEBUG_LEVEL; |
5020ded7 | 56 | module_param(debug, int, S_IRUGO | S_IWUSR); |
20fd1e3b | 57 | |
5020ded7 AB |
58 | /* Macros definitions */ |
59 | #define DBG_(lvl, fmt, args...) \ | |
60 | do { \ | |
61 | if (lvl & debug) \ | |
62 | pr_debug("[%d] %s(): " fmt "\n", \ | |
63 | __LINE__, __func__, ##args); \ | |
64 | } while (0) | |
20fd1e3b | 65 | |
5020ded7 AB |
66 | #define DBG1(args...) DBG_(0x01, ##args) |
67 | #define DBG2(args...) DBG_(0x02, ##args) | |
68 | #define DBG3(args...) DBG_(0x04, ##args) | |
69 | #define DBG4(args...) DBG_(0x08, ##args) | |
20fd1e3b FS |
70 | |
71 | /* TODO: rewrite to optimize macros... */ | |
72 | ||
73 | #define TMP_BUF_MAX 256 | |
74 | ||
2ea0452c JP |
75 | #define DUMP(buf__, len__) \ |
76 | do { \ | |
77 | char tbuf[TMP_BUF_MAX] = {0}; \ | |
78 | if (len__ > 1) { \ | |
79 | u32 data_len = min_t(u32, len__, TMP_BUF_MAX); \ | |
80 | strscpy(tbuf, buf__, data_len); \ | |
81 | if (tbuf[data_len - 2] == '\r') \ | |
82 | tbuf[data_len - 2] = 'r'; \ | |
83 | DBG1("SENDING: '%s' (%d+n)", tbuf, len__); \ | |
84 | } else { \ | |
85 | DBG1("SENDING: '%s' (%d)", tbuf, len__); \ | |
86 | } \ | |
87 | } while (0) | |
20fd1e3b FS |
88 | |
89 | /* Defines */ | |
90 | #define NOZOMI_NAME "nozomi" | |
91 | #define NOZOMI_NAME_TTY "nozomi_tty" | |
92 | #define DRIVER_DESC "Nozomi driver" | |
93 | ||
94 | #define NTTY_TTY_MAXMINORS 256 | |
95 | #define NTTY_FIFO_BUFFER_SIZE 8192 | |
96 | ||
97 | /* Must be power of 2 */ | |
98 | #define FIFO_BUFFER_SIZE_UL 8192 | |
99 | ||
100 | /* Size of tmp send buffer to card */ | |
101 | #define SEND_BUF_MAX 1024 | |
102 | #define RECEIVE_BUF_MAX 4 | |
103 | ||
104 | ||
c6964e93 JP |
105 | #define R_IIR 0x0000 /* Interrupt Identity Register */ |
106 | #define R_FCR 0x0000 /* Flow Control Register */ | |
107 | #define R_IER 0x0004 /* Interrupt Enable Register */ | |
20fd1e3b | 108 | |
03ac6b34 VR |
109 | #define NOZOMI_CONFIG_MAGIC 0xEFEFFEFE |
110 | #define TOGGLE_VALID 0x0000 | |
20fd1e3b FS |
111 | |
112 | /* Definition of interrupt tokens */ | |
c6964e93 JP |
113 | #define MDM_DL1 0x0001 |
114 | #define MDM_UL1 0x0002 | |
115 | #define MDM_DL2 0x0004 | |
116 | #define MDM_UL2 0x0008 | |
117 | #define DIAG_DL1 0x0010 | |
118 | #define DIAG_DL2 0x0020 | |
119 | #define DIAG_UL 0x0040 | |
120 | #define APP1_DL 0x0080 | |
121 | #define APP1_UL 0x0100 | |
122 | #define APP2_DL 0x0200 | |
123 | #define APP2_UL 0x0400 | |
124 | #define CTRL_DL 0x0800 | |
125 | #define CTRL_UL 0x1000 | |
126 | #define RESET 0x8000 | |
127 | ||
128 | #define MDM_DL (MDM_DL1 | MDM_DL2) | |
129 | #define MDM_UL (MDM_UL1 | MDM_UL2) | |
130 | #define DIAG_DL (DIAG_DL1 | DIAG_DL2) | |
20fd1e3b FS |
131 | |
132 | /* modem signal definition */ | |
c6964e93 JP |
133 | #define CTRL_DSR 0x0001 |
134 | #define CTRL_DCD 0x0002 | |
135 | #define CTRL_RI 0x0004 | |
136 | #define CTRL_CTS 0x0008 | |
20fd1e3b | 137 | |
c6964e93 JP |
138 | #define CTRL_DTR 0x0001 |
139 | #define CTRL_RTS 0x0002 | |
20fd1e3b FS |
140 | |
141 | #define MAX_PORT 4 | |
142 | #define NOZOMI_MAX_PORTS 5 | |
143 | #define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT) | |
144 | ||
145 | /* Type definitions */ | |
146 | ||
147 | /* | |
148 | * There are two types of nozomi cards, | |
149 | * one with 2048 memory and with 8192 memory | |
150 | */ | |
151 | enum card_type { | |
152 | F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */ | |
153 | F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */ | |
154 | }; | |
155 | ||
661b4e89 FS |
156 | /* Initialization states a card can be in */ |
157 | enum card_state { | |
4405898d | 158 | NOZOMI_STATE_UNKNOWN = 0, |
661b4e89 FS |
159 | NOZOMI_STATE_ENABLED = 1, /* pci device enabled */ |
160 | NOZOMI_STATE_ALLOCATED = 2, /* config setup done */ | |
161 | NOZOMI_STATE_READY = 3, /* flowcontrols received */ | |
162 | }; | |
163 | ||
20fd1e3b FS |
164 | /* Two different toggle channels exist */ |
165 | enum channel_type { | |
166 | CH_A = 0, | |
167 | CH_B = 1, | |
168 | }; | |
169 | ||
170 | /* Port definition for the card regarding flow control */ | |
171 | enum ctrl_port_type { | |
172 | CTRL_CMD = 0, | |
173 | CTRL_MDM = 1, | |
174 | CTRL_DIAG = 2, | |
175 | CTRL_APP1 = 3, | |
176 | CTRL_APP2 = 4, | |
177 | CTRL_ERROR = -1, | |
178 | }; | |
179 | ||
180 | /* Ports that the nozomi has */ | |
181 | enum port_type { | |
182 | PORT_MDM = 0, | |
183 | PORT_DIAG = 1, | |
184 | PORT_APP1 = 2, | |
185 | PORT_APP2 = 3, | |
186 | PORT_CTRL = 4, | |
187 | PORT_ERROR = -1, | |
188 | }; | |
189 | ||
190 | #ifdef __BIG_ENDIAN | |
191 | /* Big endian */ | |
192 | ||
193 | struct toggles { | |
e9ed537a | 194 | unsigned int enabled:5; /* |
20fd1e3b FS |
195 | * Toggle fields are valid if enabled is 0, |
196 | * else A-channels must always be used. | |
197 | */ | |
e9ed537a FS |
198 | unsigned int diag_dl:1; |
199 | unsigned int mdm_dl:1; | |
200 | unsigned int mdm_ul:1; | |
20fd1e3b FS |
201 | } __attribute__ ((packed)); |
202 | ||
203 | /* Configuration table to read at startup of card */ | |
204 | /* Is for now only needed during initialization phase */ | |
205 | struct config_table { | |
206 | u32 signature; | |
207 | u16 product_information; | |
208 | u16 version; | |
209 | u8 pad3[3]; | |
210 | struct toggles toggle; | |
211 | u8 pad1[4]; | |
212 | u16 dl_mdm_len1; /* | |
213 | * If this is 64, it can hold | |
214 | * 60 bytes + 4 that is length field | |
215 | */ | |
216 | u16 dl_start; | |
217 | ||
218 | u16 dl_diag_len1; | |
219 | u16 dl_mdm_len2; /* | |
220 | * If this is 64, it can hold | |
221 | * 60 bytes + 4 that is length field | |
222 | */ | |
223 | u16 dl_app1_len; | |
224 | ||
225 | u16 dl_diag_len2; | |
226 | u16 dl_ctrl_len; | |
227 | u16 dl_app2_len; | |
228 | u8 pad2[16]; | |
229 | u16 ul_mdm_len1; | |
230 | u16 ul_start; | |
231 | u16 ul_diag_len; | |
232 | u16 ul_mdm_len2; | |
233 | u16 ul_app1_len; | |
234 | u16 ul_app2_len; | |
235 | u16 ul_ctrl_len; | |
236 | } __attribute__ ((packed)); | |
237 | ||
238 | /* This stores all control downlink flags */ | |
239 | struct ctrl_dl { | |
240 | u8 port; | |
e9ed537a FS |
241 | unsigned int reserved:4; |
242 | unsigned int CTS:1; | |
243 | unsigned int RI:1; | |
244 | unsigned int DCD:1; | |
245 | unsigned int DSR:1; | |
20fd1e3b FS |
246 | } __attribute__ ((packed)); |
247 | ||
248 | /* This stores all control uplink flags */ | |
249 | struct ctrl_ul { | |
250 | u8 port; | |
e9ed537a FS |
251 | unsigned int reserved:6; |
252 | unsigned int RTS:1; | |
253 | unsigned int DTR:1; | |
20fd1e3b FS |
254 | } __attribute__ ((packed)); |
255 | ||
256 | #else | |
257 | /* Little endian */ | |
258 | ||
259 | /* This represents the toggle information */ | |
260 | struct toggles { | |
e9ed537a FS |
261 | unsigned int mdm_ul:1; |
262 | unsigned int mdm_dl:1; | |
263 | unsigned int diag_dl:1; | |
264 | unsigned int enabled:5; /* | |
20fd1e3b FS |
265 | * Toggle fields are valid if enabled is 0, |
266 | * else A-channels must always be used. | |
267 | */ | |
268 | } __attribute__ ((packed)); | |
269 | ||
270 | /* Configuration table to read at startup of card */ | |
271 | struct config_table { | |
272 | u32 signature; | |
273 | u16 version; | |
274 | u16 product_information; | |
275 | struct toggles toggle; | |
276 | u8 pad1[7]; | |
277 | u16 dl_start; | |
278 | u16 dl_mdm_len1; /* | |
279 | * If this is 64, it can hold | |
280 | * 60 bytes + 4 that is length field | |
281 | */ | |
282 | u16 dl_mdm_len2; | |
283 | u16 dl_diag_len1; | |
284 | u16 dl_diag_len2; | |
285 | u16 dl_app1_len; | |
286 | u16 dl_app2_len; | |
287 | u16 dl_ctrl_len; | |
288 | u8 pad2[16]; | |
289 | u16 ul_start; | |
290 | u16 ul_mdm_len2; | |
291 | u16 ul_mdm_len1; | |
292 | u16 ul_diag_len; | |
293 | u16 ul_app1_len; | |
294 | u16 ul_app2_len; | |
295 | u16 ul_ctrl_len; | |
296 | } __attribute__ ((packed)); | |
297 | ||
298 | /* This stores all control downlink flags */ | |
299 | struct ctrl_dl { | |
e9ed537a FS |
300 | unsigned int DSR:1; |
301 | unsigned int DCD:1; | |
302 | unsigned int RI:1; | |
303 | unsigned int CTS:1; | |
e2c2e798 | 304 | unsigned int reserved:4; |
20fd1e3b FS |
305 | u8 port; |
306 | } __attribute__ ((packed)); | |
307 | ||
308 | /* This stores all control uplink flags */ | |
309 | struct ctrl_ul { | |
e9ed537a FS |
310 | unsigned int DTR:1; |
311 | unsigned int RTS:1; | |
312 | unsigned int reserved:6; | |
20fd1e3b FS |
313 | u8 port; |
314 | } __attribute__ ((packed)); | |
315 | #endif | |
316 | ||
317 | /* This holds all information that is needed regarding a port */ | |
318 | struct port { | |
33dd474a | 319 | struct tty_port port; |
20fd1e3b FS |
320 | u8 update_flow_control; |
321 | struct ctrl_ul ctrl_ul; | |
322 | struct ctrl_dl ctrl_dl; | |
45465487 | 323 | struct kfifo fifo_ul; |
20fd1e3b FS |
324 | void __iomem *dl_addr[2]; |
325 | u32 dl_size[2]; | |
326 | u8 toggle_dl; | |
327 | void __iomem *ul_addr[2]; | |
328 | u32 ul_size[2]; | |
329 | u8 toggle_ul; | |
330 | u16 token_dl; | |
331 | ||
20fd1e3b FS |
332 | wait_queue_head_t tty_wait; |
333 | struct async_icount tty_icount; | |
266794eb AC |
334 | |
335 | struct nozomi *dc; | |
20fd1e3b FS |
336 | }; |
337 | ||
338 | /* Private data one for each card in the system */ | |
339 | struct nozomi { | |
340 | void __iomem *base_addr; | |
341 | unsigned long flip; | |
342 | ||
343 | /* Pointers to registers */ | |
344 | void __iomem *reg_iir; | |
345 | void __iomem *reg_fcr; | |
346 | void __iomem *reg_ier; | |
347 | ||
348 | u16 last_ier; | |
349 | enum card_type card_type; | |
350 | struct config_table config_table; /* Configuration table */ | |
351 | struct pci_dev *pdev; | |
352 | struct port port[NOZOMI_MAX_PORTS]; | |
353 | u8 *send_buf; | |
354 | ||
355 | spinlock_t spin_mutex; /* secures access to registers and tty */ | |
356 | ||
357 | unsigned int index_start; | |
661b4e89 | 358 | enum card_state state; |
20fd1e3b FS |
359 | u32 open_ttys; |
360 | }; | |
361 | ||
362 | /* This is a data packet that is read or written to/from card */ | |
363 | struct buffer { | |
364 | u32 size; /* size is the length of the data buffer */ | |
365 | u8 *data; | |
366 | } __attribute__ ((packed)); | |
367 | ||
c6964e93 | 368 | /* Global variables */ |
512f82a0 | 369 | static const struct pci_device_id nozomi_pci_tbl[] = { |
b2a3dbc3 | 370 | {PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */ |
20fd1e3b FS |
371 | {}, |
372 | }; | |
373 | ||
374 | MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl); | |
375 | ||
376 | static struct nozomi *ndevs[NOZOMI_MAX_CARDS]; | |
377 | static struct tty_driver *ntty_driver; | |
378 | ||
266794eb AC |
379 | static const struct tty_port_operations noz_tty_port_ops; |
380 | ||
20fd1e3b FS |
381 | /* |
382 | * find card by tty_index | |
383 | */ | |
384 | static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty) | |
385 | { | |
386 | return tty ? ndevs[tty->index / MAX_PORT] : NULL; | |
387 | } | |
388 | ||
389 | static inline struct port *get_port_by_tty(const struct tty_struct *tty) | |
390 | { | |
391 | struct nozomi *ndev = get_dc_by_tty(tty); | |
392 | return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL; | |
393 | } | |
394 | ||
395 | /* | |
396 | * TODO: | |
397 | * -Optimize | |
398 | * -Rewrite cleaner | |
399 | */ | |
400 | ||
401 | static void read_mem32(u32 *buf, const void __iomem *mem_addr_start, | |
402 | u32 size_bytes) | |
403 | { | |
404 | u32 i = 0; | |
782a6de4 | 405 | const u32 __iomem *ptr = mem_addr_start; |
20fd1e3b FS |
406 | u16 *buf16; |
407 | ||
408 | if (unlikely(!ptr || !buf)) | |
409 | goto out; | |
410 | ||
411 | /* shortcut for extremely often used cases */ | |
412 | switch (size_bytes) { | |
413 | case 2: /* 2 bytes */ | |
414 | buf16 = (u16 *) buf; | |
782a6de4 | 415 | *buf16 = __le16_to_cpu(readw(ptr)); |
20fd1e3b | 416 | goto out; |
20fd1e3b | 417 | case 4: /* 4 bytes */ |
782a6de4 | 418 | *(buf) = __le32_to_cpu(readl(ptr)); |
20fd1e3b | 419 | goto out; |
20fd1e3b FS |
420 | } |
421 | ||
422 | while (i < size_bytes) { | |
423 | if (size_bytes - i == 2) { | |
424 | /* Handle 2 bytes in the end */ | |
425 | buf16 = (u16 *) buf; | |
782a6de4 | 426 | *(buf16) = __le16_to_cpu(readw(ptr)); |
20fd1e3b FS |
427 | i += 2; |
428 | } else { | |
429 | /* Read 4 bytes */ | |
782a6de4 | 430 | *(buf) = __le32_to_cpu(readl(ptr)); |
20fd1e3b FS |
431 | i += 4; |
432 | } | |
433 | buf++; | |
434 | ptr++; | |
435 | } | |
436 | out: | |
437 | return; | |
438 | } | |
439 | ||
440 | /* | |
441 | * TODO: | |
442 | * -Optimize | |
443 | * -Rewrite cleaner | |
444 | */ | |
71e1b4ab | 445 | static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf, |
20fd1e3b FS |
446 | u32 size_bytes) |
447 | { | |
448 | u32 i = 0; | |
782a6de4 | 449 | u32 __iomem *ptr = mem_addr_start; |
71e1b4ab | 450 | const u16 *buf16; |
20fd1e3b FS |
451 | |
452 | if (unlikely(!ptr || !buf)) | |
453 | return 0; | |
454 | ||
455 | /* shortcut for extremely often used cases */ | |
456 | switch (size_bytes) { | |
457 | case 2: /* 2 bytes */ | |
71e1b4ab | 458 | buf16 = (const u16 *)buf; |
782a6de4 | 459 | writew(__cpu_to_le16(*buf16), ptr); |
20fd1e3b | 460 | return 2; |
20fd1e3b FS |
461 | case 1: /* |
462 | * also needs to write 4 bytes in this case | |
463 | * so falling through.. | |
464 | */ | |
1a460c36 | 465 | fallthrough; |
20fd1e3b | 466 | case 4: /* 4 bytes */ |
782a6de4 | 467 | writel(__cpu_to_le32(*buf), ptr); |
20fd1e3b | 468 | return 4; |
20fd1e3b FS |
469 | } |
470 | ||
471 | while (i < size_bytes) { | |
472 | if (size_bytes - i == 2) { | |
473 | /* 2 bytes */ | |
71e1b4ab | 474 | buf16 = (const u16 *)buf; |
782a6de4 | 475 | writew(__cpu_to_le16(*buf16), ptr); |
20fd1e3b FS |
476 | i += 2; |
477 | } else { | |
478 | /* 4 bytes */ | |
782a6de4 | 479 | writel(__cpu_to_le32(*buf), ptr); |
20fd1e3b FS |
480 | i += 4; |
481 | } | |
482 | buf++; | |
483 | ptr++; | |
484 | } | |
485 | return i; | |
486 | } | |
487 | ||
488 | /* Setup pointers to different channels and also setup buffer sizes. */ | |
7acb88af | 489 | static void nozomi_setup_memory(struct nozomi *dc) |
20fd1e3b FS |
490 | { |
491 | void __iomem *offset = dc->base_addr + dc->config_table.dl_start; | |
492 | /* The length reported is including the length field of 4 bytes, | |
493 | * hence subtract with 4. | |
494 | */ | |
495 | const u16 buff_offset = 4; | |
496 | ||
497 | /* Modem port dl configuration */ | |
498 | dc->port[PORT_MDM].dl_addr[CH_A] = offset; | |
499 | dc->port[PORT_MDM].dl_addr[CH_B] = | |
500 | (offset += dc->config_table.dl_mdm_len1); | |
501 | dc->port[PORT_MDM].dl_size[CH_A] = | |
502 | dc->config_table.dl_mdm_len1 - buff_offset; | |
503 | dc->port[PORT_MDM].dl_size[CH_B] = | |
504 | dc->config_table.dl_mdm_len2 - buff_offset; | |
505 | ||
506 | /* Diag port dl configuration */ | |
507 | dc->port[PORT_DIAG].dl_addr[CH_A] = | |
508 | (offset += dc->config_table.dl_mdm_len2); | |
509 | dc->port[PORT_DIAG].dl_size[CH_A] = | |
510 | dc->config_table.dl_diag_len1 - buff_offset; | |
511 | dc->port[PORT_DIAG].dl_addr[CH_B] = | |
512 | (offset += dc->config_table.dl_diag_len1); | |
513 | dc->port[PORT_DIAG].dl_size[CH_B] = | |
514 | dc->config_table.dl_diag_len2 - buff_offset; | |
515 | ||
516 | /* App1 port dl configuration */ | |
517 | dc->port[PORT_APP1].dl_addr[CH_A] = | |
518 | (offset += dc->config_table.dl_diag_len2); | |
519 | dc->port[PORT_APP1].dl_size[CH_A] = | |
520 | dc->config_table.dl_app1_len - buff_offset; | |
521 | ||
522 | /* App2 port dl configuration */ | |
523 | dc->port[PORT_APP2].dl_addr[CH_A] = | |
524 | (offset += dc->config_table.dl_app1_len); | |
525 | dc->port[PORT_APP2].dl_size[CH_A] = | |
526 | dc->config_table.dl_app2_len - buff_offset; | |
527 | ||
528 | /* Ctrl dl configuration */ | |
529 | dc->port[PORT_CTRL].dl_addr[CH_A] = | |
530 | (offset += dc->config_table.dl_app2_len); | |
531 | dc->port[PORT_CTRL].dl_size[CH_A] = | |
532 | dc->config_table.dl_ctrl_len - buff_offset; | |
533 | ||
534 | offset = dc->base_addr + dc->config_table.ul_start; | |
535 | ||
536 | /* Modem Port ul configuration */ | |
537 | dc->port[PORT_MDM].ul_addr[CH_A] = offset; | |
538 | dc->port[PORT_MDM].ul_size[CH_A] = | |
539 | dc->config_table.ul_mdm_len1 - buff_offset; | |
540 | dc->port[PORT_MDM].ul_addr[CH_B] = | |
541 | (offset += dc->config_table.ul_mdm_len1); | |
542 | dc->port[PORT_MDM].ul_size[CH_B] = | |
543 | dc->config_table.ul_mdm_len2 - buff_offset; | |
544 | ||
545 | /* Diag port ul configuration */ | |
546 | dc->port[PORT_DIAG].ul_addr[CH_A] = | |
547 | (offset += dc->config_table.ul_mdm_len2); | |
548 | dc->port[PORT_DIAG].ul_size[CH_A] = | |
549 | dc->config_table.ul_diag_len - buff_offset; | |
550 | ||
551 | /* App1 port ul configuration */ | |
552 | dc->port[PORT_APP1].ul_addr[CH_A] = | |
553 | (offset += dc->config_table.ul_diag_len); | |
554 | dc->port[PORT_APP1].ul_size[CH_A] = | |
555 | dc->config_table.ul_app1_len - buff_offset; | |
556 | ||
557 | /* App2 port ul configuration */ | |
558 | dc->port[PORT_APP2].ul_addr[CH_A] = | |
559 | (offset += dc->config_table.ul_app1_len); | |
560 | dc->port[PORT_APP2].ul_size[CH_A] = | |
561 | dc->config_table.ul_app2_len - buff_offset; | |
562 | ||
563 | /* Ctrl ul configuration */ | |
564 | dc->port[PORT_CTRL].ul_addr[CH_A] = | |
565 | (offset += dc->config_table.ul_app2_len); | |
566 | dc->port[PORT_CTRL].ul_size[CH_A] = | |
567 | dc->config_table.ul_ctrl_len - buff_offset; | |
568 | } | |
569 | ||
570 | /* Dump config table under initalization phase */ | |
571 | #ifdef DEBUG | |
572 | static void dump_table(const struct nozomi *dc) | |
573 | { | |
574 | DBG3("signature: 0x%08X", dc->config_table.signature); | |
575 | DBG3("version: 0x%04X", dc->config_table.version); | |
576 | DBG3("product_information: 0x%04X", \ | |
577 | dc->config_table.product_information); | |
578 | DBG3("toggle enabled: %d", dc->config_table.toggle.enabled); | |
579 | DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul); | |
580 | DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl); | |
581 | DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl); | |
582 | ||
583 | DBG3("dl_start: 0x%04X", dc->config_table.dl_start); | |
584 | DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1, | |
585 | dc->config_table.dl_mdm_len1); | |
586 | DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2, | |
587 | dc->config_table.dl_mdm_len2); | |
588 | DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1, | |
589 | dc->config_table.dl_diag_len1); | |
590 | DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2, | |
591 | dc->config_table.dl_diag_len2); | |
592 | DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len, | |
593 | dc->config_table.dl_app1_len); | |
594 | DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len, | |
595 | dc->config_table.dl_app2_len); | |
596 | DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len, | |
597 | dc->config_table.dl_ctrl_len); | |
598 | DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start, | |
599 | dc->config_table.ul_start); | |
600 | DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1, | |
601 | dc->config_table.ul_mdm_len1); | |
602 | DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2, | |
603 | dc->config_table.ul_mdm_len2); | |
604 | DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len, | |
605 | dc->config_table.ul_diag_len); | |
606 | DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len, | |
607 | dc->config_table.ul_app1_len); | |
608 | DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len, | |
609 | dc->config_table.ul_app2_len); | |
610 | DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len, | |
611 | dc->config_table.ul_ctrl_len); | |
612 | } | |
613 | #else | |
e9ed537a | 614 | static inline void dump_table(const struct nozomi *dc) { } |
20fd1e3b FS |
615 | #endif |
616 | ||
617 | /* | |
618 | * Read configuration table from card under intalization phase | |
619 | * Returns 1 if ok, else 0 | |
620 | */ | |
621 | static int nozomi_read_config_table(struct nozomi *dc) | |
622 | { | |
623 | read_mem32((u32 *) &dc->config_table, dc->base_addr + 0, | |
624 | sizeof(struct config_table)); | |
625 | ||
03ac6b34 | 626 | if (dc->config_table.signature != NOZOMI_CONFIG_MAGIC) { |
20fd1e3b | 627 | dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n", |
03ac6b34 | 628 | dc->config_table.signature, NOZOMI_CONFIG_MAGIC); |
20fd1e3b FS |
629 | return 0; |
630 | } | |
631 | ||
632 | if ((dc->config_table.version == 0) | |
633 | || (dc->config_table.toggle.enabled == TOGGLE_VALID)) { | |
634 | int i; | |
635 | DBG1("Second phase, configuring card"); | |
636 | ||
7acb88af | 637 | nozomi_setup_memory(dc); |
20fd1e3b FS |
638 | |
639 | dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul; | |
640 | dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl; | |
641 | dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl; | |
642 | DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d", | |
643 | dc->port[PORT_MDM].toggle_ul, | |
644 | dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl); | |
645 | ||
646 | dump_table(dc); | |
647 | ||
648 | for (i = PORT_MDM; i < MAX_PORT; i++) { | |
20fd1e3b FS |
649 | memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl)); |
650 | memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul)); | |
651 | } | |
652 | ||
653 | /* Enable control channel */ | |
654 | dc->last_ier = dc->last_ier | CTRL_DL; | |
655 | writew(dc->last_ier, dc->reg_ier); | |
656 | ||
661b4e89 | 657 | dc->state = NOZOMI_STATE_ALLOCATED; |
20fd1e3b FS |
658 | dev_info(&dc->pdev->dev, "Initialization OK!\n"); |
659 | return 1; | |
660 | } | |
661 | ||
662 | if ((dc->config_table.version > 0) | |
663 | && (dc->config_table.toggle.enabled != TOGGLE_VALID)) { | |
664 | u32 offset = 0; | |
665 | DBG1("First phase: pushing upload buffers, clearing download"); | |
666 | ||
667 | dev_info(&dc->pdev->dev, "Version of card: %d\n", | |
668 | dc->config_table.version); | |
669 | ||
670 | /* Here we should disable all I/O over F32. */ | |
7acb88af | 671 | nozomi_setup_memory(dc); |
20fd1e3b FS |
672 | |
673 | /* | |
674 | * We should send ALL channel pair tokens back along | |
675 | * with reset token | |
676 | */ | |
677 | ||
678 | /* push upload modem buffers */ | |
679 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_A], | |
680 | (u32 *) &offset, 4); | |
681 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_B], | |
682 | (u32 *) &offset, 4); | |
683 | ||
684 | writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr); | |
685 | ||
686 | DBG1("First phase done"); | |
687 | } | |
688 | ||
689 | return 1; | |
690 | } | |
691 | ||
692 | /* Enable uplink interrupts */ | |
693 | static void enable_transmit_ul(enum port_type port, struct nozomi *dc) | |
694 | { | |
71e1b4ab | 695 | static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL}; |
20fd1e3b FS |
696 | |
697 | if (port < NOZOMI_MAX_PORTS) { | |
698 | dc->last_ier |= mask[port]; | |
699 | writew(dc->last_ier, dc->reg_ier); | |
700 | } else { | |
701 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | |
702 | } | |
703 | } | |
704 | ||
705 | /* Disable uplink interrupts */ | |
706 | static void disable_transmit_ul(enum port_type port, struct nozomi *dc) | |
707 | { | |
71e1b4ab JE |
708 | static const u16 mask[] = |
709 | {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL}; | |
20fd1e3b FS |
710 | |
711 | if (port < NOZOMI_MAX_PORTS) { | |
712 | dc->last_ier &= mask[port]; | |
713 | writew(dc->last_ier, dc->reg_ier); | |
714 | } else { | |
715 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | |
716 | } | |
717 | } | |
718 | ||
719 | /* Enable downlink interrupts */ | |
720 | static void enable_transmit_dl(enum port_type port, struct nozomi *dc) | |
721 | { | |
71e1b4ab | 722 | static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL}; |
20fd1e3b FS |
723 | |
724 | if (port < NOZOMI_MAX_PORTS) { | |
725 | dc->last_ier |= mask[port]; | |
726 | writew(dc->last_ier, dc->reg_ier); | |
727 | } else { | |
728 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | |
729 | } | |
730 | } | |
731 | ||
732 | /* Disable downlink interrupts */ | |
733 | static void disable_transmit_dl(enum port_type port, struct nozomi *dc) | |
734 | { | |
71e1b4ab JE |
735 | static const u16 mask[] = |
736 | {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL}; | |
20fd1e3b FS |
737 | |
738 | if (port < NOZOMI_MAX_PORTS) { | |
739 | dc->last_ier &= mask[port]; | |
740 | writew(dc->last_ier, dc->reg_ier); | |
741 | } else { | |
742 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); | |
743 | } | |
744 | } | |
745 | ||
746 | /* | |
747 | * Return 1 - send buffer to card and ack. | |
748 | * Return 0 - don't ack, don't send buffer to card. | |
749 | */ | |
33dd474a | 750 | static int send_data(enum port_type index, struct nozomi *dc) |
20fd1e3b FS |
751 | { |
752 | u32 size = 0; | |
33dd474a | 753 | struct port *port = &dc->port[index]; |
18bbe0c2 | 754 | const u8 toggle = port->toggle_ul; |
20fd1e3b | 755 | void __iomem *addr = port->ul_addr[toggle]; |
18bbe0c2 | 756 | const u32 ul_size = port->ul_size[toggle]; |
20fd1e3b FS |
757 | |
758 | /* Get data from tty and place in buf for now */ | |
7acd72eb | 759 | size = kfifo_out(&port->fifo_ul, dc->send_buf, |
20fd1e3b FS |
760 | ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX); |
761 | ||
762 | if (size == 0) { | |
763 | DBG4("No more data to send, disable link:"); | |
764 | return 0; | |
765 | } | |
766 | ||
767 | /* DUMP(buf, size); */ | |
768 | ||
769 | /* Write length + data */ | |
770 | write_mem32(addr, (u32 *) &size, 4); | |
771 | write_mem32(addr + 4, (u32 *) dc->send_buf, size); | |
772 | ||
6aad04f2 | 773 | tty_port_tty_wakeup(&port->port); |
20fd1e3b FS |
774 | |
775 | return 1; | |
776 | } | |
777 | ||
778 | /* If all data has been read, return 1, else 0 */ | |
779 | static int receive_data(enum port_type index, struct nozomi *dc) | |
780 | { | |
781 | u8 buf[RECEIVE_BUF_MAX] = { 0 }; | |
782 | int size; | |
783 | u32 offset = 4; | |
784 | struct port *port = &dc->port[index]; | |
785 | void __iomem *addr = port->dl_addr[port->toggle_dl]; | |
33dd474a | 786 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
9237a81a | 787 | int i, ret; |
20fd1e3b | 788 | |
a4f642a8 | 789 | size = __le32_to_cpu(readl(addr)); |
20fd1e3b FS |
790 | /* DBG1( "%d bytes port: %d", size, index); */ |
791 | ||
97ef38b8 | 792 | if (tty && tty_throttled(tty)) { |
20fd1e3b FS |
793 | DBG1("No room in tty, don't read data, don't ack interrupt, " |
794 | "disable interrupt"); | |
795 | ||
796 | /* disable interrupt in downlink... */ | |
797 | disable_transmit_dl(index, dc); | |
9237a81a JS |
798 | ret = 0; |
799 | goto put; | |
20fd1e3b FS |
800 | } |
801 | ||
802 | if (unlikely(size == 0)) { | |
803 | dev_err(&dc->pdev->dev, "size == 0?\n"); | |
9237a81a JS |
804 | ret = 1; |
805 | goto put; | |
20fd1e3b FS |
806 | } |
807 | ||
20fd1e3b FS |
808 | while (size > 0) { |
809 | read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX); | |
810 | ||
811 | if (size == 1) { | |
92a19f9c | 812 | tty_insert_flip_char(&port->port, buf[0], TTY_NORMAL); |
20fd1e3b FS |
813 | size = 0; |
814 | } else if (size < RECEIVE_BUF_MAX) { | |
05c7cd39 JS |
815 | size -= tty_insert_flip_string(&port->port, |
816 | (char *)buf, size); | |
20fd1e3b | 817 | } else { |
05c7cd39 JS |
818 | i = tty_insert_flip_string(&port->port, |
819 | (char *)buf, RECEIVE_BUF_MAX); | |
20fd1e3b FS |
820 | size -= i; |
821 | offset += i; | |
822 | } | |
823 | } | |
824 | ||
825 | set_bit(index, &dc->flip); | |
9237a81a JS |
826 | ret = 1; |
827 | put: | |
33dd474a | 828 | tty_kref_put(tty); |
9237a81a | 829 | return ret; |
20fd1e3b FS |
830 | } |
831 | ||
832 | /* Debug for interrupts */ | |
833 | #ifdef DEBUG | |
834 | static char *interrupt2str(u16 interrupt) | |
835 | { | |
836 | static char buf[TMP_BUF_MAX]; | |
837 | char *p = buf; | |
838 | ||
caa47cc6 TI |
839 | if (interrupt & MDM_DL1) |
840 | p += scnprintf(p, TMP_BUF_MAX, "MDM_DL1 "); | |
841 | if (interrupt & MDM_DL2) | |
842 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_DL2 "); | |
843 | if (interrupt & MDM_UL1) | |
844 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_UL1 "); | |
845 | if (interrupt & MDM_UL2) | |
846 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_UL2 "); | |
847 | if (interrupt & DIAG_DL1) | |
848 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_DL1 "); | |
849 | if (interrupt & DIAG_DL2) | |
850 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_DL2 "); | |
851 | ||
852 | if (interrupt & DIAG_UL) | |
853 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_UL "); | |
854 | ||
855 | if (interrupt & APP1_DL) | |
856 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP1_DL "); | |
857 | if (interrupt & APP2_DL) | |
858 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP2_DL "); | |
859 | ||
860 | if (interrupt & APP1_UL) | |
861 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP1_UL "); | |
862 | if (interrupt & APP2_UL) | |
863 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP2_UL "); | |
864 | ||
865 | if (interrupt & CTRL_DL) | |
866 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "CTRL_DL "); | |
867 | if (interrupt & CTRL_UL) | |
868 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "CTRL_UL "); | |
869 | ||
870 | if (interrupt & RESET) | |
871 | p += scnprintf(p, TMP_BUF_MAX - (p - buf), "RESET "); | |
20fd1e3b FS |
872 | |
873 | return buf; | |
874 | } | |
875 | #endif | |
876 | ||
877 | /* | |
878 | * Receive flow control | |
879 | * Return 1 - If ok, else 0 | |
880 | */ | |
881 | static int receive_flow_control(struct nozomi *dc) | |
882 | { | |
883 | enum port_type port = PORT_MDM; | |
884 | struct ctrl_dl ctrl_dl; | |
885 | struct ctrl_dl old_ctrl; | |
886 | u16 enable_ier = 0; | |
887 | ||
888 | read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2); | |
889 | ||
890 | switch (ctrl_dl.port) { | |
891 | case CTRL_CMD: | |
892 | DBG1("The Base Band sends this value as a response to a " | |
893 | "request for IMSI detach sent over the control " | |
894 | "channel uplink (see section 7.6.1)."); | |
895 | break; | |
896 | case CTRL_MDM: | |
897 | port = PORT_MDM; | |
898 | enable_ier = MDM_DL; | |
899 | break; | |
900 | case CTRL_DIAG: | |
901 | port = PORT_DIAG; | |
902 | enable_ier = DIAG_DL; | |
903 | break; | |
904 | case CTRL_APP1: | |
905 | port = PORT_APP1; | |
906 | enable_ier = APP1_DL; | |
907 | break; | |
908 | case CTRL_APP2: | |
909 | port = PORT_APP2; | |
910 | enable_ier = APP2_DL; | |
661b4e89 FS |
911 | if (dc->state == NOZOMI_STATE_ALLOCATED) { |
912 | /* | |
913 | * After card initialization the flow control | |
914 | * received for APP2 is always the last | |
915 | */ | |
916 | dc->state = NOZOMI_STATE_READY; | |
917 | dev_info(&dc->pdev->dev, "Device READY!\n"); | |
918 | } | |
20fd1e3b FS |
919 | break; |
920 | default: | |
921 | dev_err(&dc->pdev->dev, | |
922 | "ERROR: flow control received for non-existing port\n"); | |
923 | return 0; | |
fc811472 | 924 | } |
20fd1e3b FS |
925 | |
926 | DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl), | |
927 | *((u16 *)&ctrl_dl)); | |
928 | ||
929 | old_ctrl = dc->port[port].ctrl_dl; | |
930 | dc->port[port].ctrl_dl = ctrl_dl; | |
931 | ||
932 | if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) { | |
933 | DBG1("Disable interrupt (0x%04X) on port: %d", | |
934 | enable_ier, port); | |
935 | disable_transmit_ul(port, dc); | |
936 | ||
937 | } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) { | |
938 | ||
e64c026d | 939 | if (kfifo_len(&dc->port[port].fifo_ul)) { |
20fd1e3b FS |
940 | DBG1("Enable interrupt (0x%04X) on port: %d", |
941 | enable_ier, port); | |
942 | DBG1("Data in buffer [%d], enable transmit! ", | |
e64c026d | 943 | kfifo_len(&dc->port[port].fifo_ul)); |
20fd1e3b FS |
944 | enable_transmit_ul(port, dc); |
945 | } else { | |
946 | DBG1("No data in buffer..."); | |
947 | } | |
948 | } | |
949 | ||
950 | if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) { | |
951 | DBG1(" No change in mctrl"); | |
952 | return 1; | |
953 | } | |
954 | /* Update statistics */ | |
955 | if (old_ctrl.CTS != ctrl_dl.CTS) | |
956 | dc->port[port].tty_icount.cts++; | |
957 | if (old_ctrl.DSR != ctrl_dl.DSR) | |
958 | dc->port[port].tty_icount.dsr++; | |
959 | if (old_ctrl.RI != ctrl_dl.RI) | |
960 | dc->port[port].tty_icount.rng++; | |
961 | if (old_ctrl.DCD != ctrl_dl.DCD) | |
962 | dc->port[port].tty_icount.dcd++; | |
963 | ||
964 | wake_up_interruptible(&dc->port[port].tty_wait); | |
965 | ||
966 | DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)", | |
967 | port, | |
968 | dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts, | |
969 | dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr); | |
970 | ||
971 | return 1; | |
972 | } | |
973 | ||
974 | static enum ctrl_port_type port2ctrl(enum port_type port, | |
975 | const struct nozomi *dc) | |
976 | { | |
977 | switch (port) { | |
978 | case PORT_MDM: | |
979 | return CTRL_MDM; | |
980 | case PORT_DIAG: | |
981 | return CTRL_DIAG; | |
982 | case PORT_APP1: | |
983 | return CTRL_APP1; | |
984 | case PORT_APP2: | |
985 | return CTRL_APP2; | |
986 | default: | |
987 | dev_err(&dc->pdev->dev, | |
988 | "ERROR: send flow control " \ | |
989 | "received for non-existing port\n"); | |
fc811472 | 990 | } |
20fd1e3b FS |
991 | return CTRL_ERROR; |
992 | } | |
993 | ||
994 | /* | |
995 | * Send flow control, can only update one channel at a time | |
996 | * Return 0 - If we have updated all flow control | |
997 | * Return 1 - If we need to update more flow control, ack current enable more | |
998 | */ | |
999 | static int send_flow_control(struct nozomi *dc) | |
1000 | { | |
1001 | u32 i, more_flow_control_to_be_updated = 0; | |
1002 | u16 *ctrl; | |
1003 | ||
1004 | for (i = PORT_MDM; i < MAX_PORT; i++) { | |
1005 | if (dc->port[i].update_flow_control) { | |
1006 | if (more_flow_control_to_be_updated) { | |
1007 | /* We have more flow control to be updated */ | |
1008 | return 1; | |
1009 | } | |
1010 | dc->port[i].ctrl_ul.port = port2ctrl(i, dc); | |
1011 | ctrl = (u16 *)&dc->port[i].ctrl_ul; | |
1012 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], \ | |
1013 | (u32 *) ctrl, 2); | |
1014 | dc->port[i].update_flow_control = 0; | |
1015 | more_flow_control_to_be_updated = 1; | |
1016 | } | |
1017 | } | |
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | /* | |
e9ed537a | 1022 | * Handle downlink data, ports that are handled are modem and diagnostics |
20fd1e3b FS |
1023 | * Return 1 - ok |
1024 | * Return 0 - toggle fields are out of sync | |
1025 | */ | |
1026 | static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle, | |
1027 | u16 read_iir, u16 mask1, u16 mask2) | |
1028 | { | |
1029 | if (*toggle == 0 && read_iir & mask1) { | |
1030 | if (receive_data(port, dc)) { | |
1031 | writew(mask1, dc->reg_fcr); | |
1032 | *toggle = !(*toggle); | |
1033 | } | |
1034 | ||
1035 | if (read_iir & mask2) { | |
1036 | if (receive_data(port, dc)) { | |
1037 | writew(mask2, dc->reg_fcr); | |
1038 | *toggle = !(*toggle); | |
1039 | } | |
1040 | } | |
1041 | } else if (*toggle == 1 && read_iir & mask2) { | |
1042 | if (receive_data(port, dc)) { | |
1043 | writew(mask2, dc->reg_fcr); | |
1044 | *toggle = !(*toggle); | |
1045 | } | |
1046 | ||
1047 | if (read_iir & mask1) { | |
1048 | if (receive_data(port, dc)) { | |
1049 | writew(mask1, dc->reg_fcr); | |
1050 | *toggle = !(*toggle); | |
1051 | } | |
1052 | } | |
1053 | } else { | |
1054 | dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n", | |
1055 | *toggle); | |
1056 | return 0; | |
1057 | } | |
1058 | return 1; | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * Handle uplink data, this is currently for the modem port | |
1063 | * Return 1 - ok | |
1064 | * Return 0 - toggle field are out of sync | |
1065 | */ | |
1066 | static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir) | |
1067 | { | |
1068 | u8 *toggle = &(dc->port[port].toggle_ul); | |
1069 | ||
1070 | if (*toggle == 0 && read_iir & MDM_UL1) { | |
1071 | dc->last_ier &= ~MDM_UL; | |
1072 | writew(dc->last_ier, dc->reg_ier); | |
1073 | if (send_data(port, dc)) { | |
1074 | writew(MDM_UL1, dc->reg_fcr); | |
1075 | dc->last_ier = dc->last_ier | MDM_UL; | |
1076 | writew(dc->last_ier, dc->reg_ier); | |
1077 | *toggle = !*toggle; | |
1078 | } | |
1079 | ||
1080 | if (read_iir & MDM_UL2) { | |
1081 | dc->last_ier &= ~MDM_UL; | |
1082 | writew(dc->last_ier, dc->reg_ier); | |
1083 | if (send_data(port, dc)) { | |
1084 | writew(MDM_UL2, dc->reg_fcr); | |
1085 | dc->last_ier = dc->last_ier | MDM_UL; | |
1086 | writew(dc->last_ier, dc->reg_ier); | |
1087 | *toggle = !*toggle; | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | } else if (*toggle == 1 && read_iir & MDM_UL2) { | |
1092 | dc->last_ier &= ~MDM_UL; | |
1093 | writew(dc->last_ier, dc->reg_ier); | |
1094 | if (send_data(port, dc)) { | |
1095 | writew(MDM_UL2, dc->reg_fcr); | |
1096 | dc->last_ier = dc->last_ier | MDM_UL; | |
1097 | writew(dc->last_ier, dc->reg_ier); | |
1098 | *toggle = !*toggle; | |
1099 | } | |
1100 | ||
1101 | if (read_iir & MDM_UL1) { | |
1102 | dc->last_ier &= ~MDM_UL; | |
1103 | writew(dc->last_ier, dc->reg_ier); | |
1104 | if (send_data(port, dc)) { | |
1105 | writew(MDM_UL1, dc->reg_fcr); | |
1106 | dc->last_ier = dc->last_ier | MDM_UL; | |
1107 | writew(dc->last_ier, dc->reg_ier); | |
1108 | *toggle = !*toggle; | |
1109 | } | |
1110 | } | |
1111 | } else { | |
1112 | writew(read_iir & MDM_UL, dc->reg_fcr); | |
1113 | dev_err(&dc->pdev->dev, "port out of sync!\n"); | |
1114 | return 0; | |
1115 | } | |
1116 | return 1; | |
1117 | } | |
1118 | ||
1119 | static irqreturn_t interrupt_handler(int irq, void *dev_id) | |
1120 | { | |
1121 | struct nozomi *dc = dev_id; | |
1122 | unsigned int a; | |
1123 | u16 read_iir; | |
1124 | ||
1125 | if (!dc) | |
1126 | return IRQ_NONE; | |
1127 | ||
1128 | spin_lock(&dc->spin_mutex); | |
1129 | read_iir = readw(dc->reg_iir); | |
1130 | ||
1131 | /* Card removed */ | |
1132 | if (read_iir == (u16)-1) | |
1133 | goto none; | |
1134 | /* | |
1135 | * Just handle interrupt enabled in IER | |
1136 | * (by masking with dc->last_ier) | |
1137 | */ | |
1138 | read_iir &= dc->last_ier; | |
1139 | ||
1140 | if (read_iir == 0) | |
1141 | goto none; | |
1142 | ||
1143 | ||
1144 | DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir, | |
1145 | dc->last_ier); | |
1146 | ||
1147 | if (read_iir & RESET) { | |
1148 | if (unlikely(!nozomi_read_config_table(dc))) { | |
1149 | dc->last_ier = 0x0; | |
1150 | writew(dc->last_ier, dc->reg_ier); | |
1151 | dev_err(&dc->pdev->dev, "Could not read status from " | |
1152 | "card, we should disable interface\n"); | |
1153 | } else { | |
1154 | writew(RESET, dc->reg_fcr); | |
1155 | } | |
1156 | /* No more useful info if this was the reset interrupt. */ | |
1157 | goto exit_handler; | |
1158 | } | |
1159 | if (read_iir & CTRL_UL) { | |
1160 | DBG1("CTRL_UL"); | |
1161 | dc->last_ier &= ~CTRL_UL; | |
1162 | writew(dc->last_ier, dc->reg_ier); | |
1163 | if (send_flow_control(dc)) { | |
1164 | writew(CTRL_UL, dc->reg_fcr); | |
1165 | dc->last_ier = dc->last_ier | CTRL_UL; | |
1166 | writew(dc->last_ier, dc->reg_ier); | |
1167 | } | |
1168 | } | |
1169 | if (read_iir & CTRL_DL) { | |
1170 | receive_flow_control(dc); | |
1171 | writew(CTRL_DL, dc->reg_fcr); | |
1172 | } | |
1173 | if (read_iir & MDM_DL) { | |
1174 | if (!handle_data_dl(dc, PORT_MDM, | |
1175 | &(dc->port[PORT_MDM].toggle_dl), read_iir, | |
1176 | MDM_DL1, MDM_DL2)) { | |
1177 | dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n"); | |
1178 | goto exit_handler; | |
1179 | } | |
1180 | } | |
1181 | if (read_iir & MDM_UL) { | |
1182 | if (!handle_data_ul(dc, PORT_MDM, read_iir)) { | |
1183 | dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n"); | |
1184 | goto exit_handler; | |
1185 | } | |
1186 | } | |
1187 | if (read_iir & DIAG_DL) { | |
1188 | if (!handle_data_dl(dc, PORT_DIAG, | |
1189 | &(dc->port[PORT_DIAG].toggle_dl), read_iir, | |
1190 | DIAG_DL1, DIAG_DL2)) { | |
1191 | dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n"); | |
1192 | goto exit_handler; | |
1193 | } | |
1194 | } | |
1195 | if (read_iir & DIAG_UL) { | |
1196 | dc->last_ier &= ~DIAG_UL; | |
1197 | writew(dc->last_ier, dc->reg_ier); | |
1198 | if (send_data(PORT_DIAG, dc)) { | |
1199 | writew(DIAG_UL, dc->reg_fcr); | |
1200 | dc->last_ier = dc->last_ier | DIAG_UL; | |
1201 | writew(dc->last_ier, dc->reg_ier); | |
1202 | } | |
1203 | } | |
1204 | if (read_iir & APP1_DL) { | |
1205 | if (receive_data(PORT_APP1, dc)) | |
1206 | writew(APP1_DL, dc->reg_fcr); | |
1207 | } | |
1208 | if (read_iir & APP1_UL) { | |
1209 | dc->last_ier &= ~APP1_UL; | |
1210 | writew(dc->last_ier, dc->reg_ier); | |
1211 | if (send_data(PORT_APP1, dc)) { | |
1212 | writew(APP1_UL, dc->reg_fcr); | |
1213 | dc->last_ier = dc->last_ier | APP1_UL; | |
1214 | writew(dc->last_ier, dc->reg_ier); | |
1215 | } | |
1216 | } | |
1217 | if (read_iir & APP2_DL) { | |
1218 | if (receive_data(PORT_APP2, dc)) | |
1219 | writew(APP2_DL, dc->reg_fcr); | |
1220 | } | |
1221 | if (read_iir & APP2_UL) { | |
1222 | dc->last_ier &= ~APP2_UL; | |
1223 | writew(dc->last_ier, dc->reg_ier); | |
1224 | if (send_data(PORT_APP2, dc)) { | |
1225 | writew(APP2_UL, dc->reg_fcr); | |
1226 | dc->last_ier = dc->last_ier | APP2_UL; | |
1227 | writew(dc->last_ier, dc->reg_ier); | |
1228 | } | |
1229 | } | |
1230 | ||
1231 | exit_handler: | |
1232 | spin_unlock(&dc->spin_mutex); | |
2e124b4a JS |
1233 | |
1234 | for (a = 0; a < NOZOMI_MAX_PORTS; a++) | |
1235 | if (test_and_clear_bit(a, &dc->flip)) | |
1236 | tty_flip_buffer_push(&dc->port[a].port); | |
1237 | ||
20fd1e3b FS |
1238 | return IRQ_HANDLED; |
1239 | none: | |
1240 | spin_unlock(&dc->spin_mutex); | |
1241 | return IRQ_NONE; | |
1242 | } | |
1243 | ||
1244 | static void nozomi_get_card_type(struct nozomi *dc) | |
1245 | { | |
1246 | int i; | |
1247 | u32 size = 0; | |
1248 | ||
1249 | for (i = 0; i < 6; i++) | |
1250 | size += pci_resource_len(dc->pdev, i); | |
1251 | ||
1252 | /* Assume card type F32_8 if no match */ | |
1253 | dc->card_type = size == 2048 ? F32_2 : F32_8; | |
1254 | ||
1255 | dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type); | |
1256 | } | |
1257 | ||
1258 | static void nozomi_setup_private_data(struct nozomi *dc) | |
1259 | { | |
1260 | void __iomem *offset = dc->base_addr + dc->card_type / 2; | |
1261 | unsigned int i; | |
1262 | ||
1263 | dc->reg_fcr = (void __iomem *)(offset + R_FCR); | |
1264 | dc->reg_iir = (void __iomem *)(offset + R_IIR); | |
1265 | dc->reg_ier = (void __iomem *)(offset + R_IER); | |
1266 | dc->last_ier = 0; | |
1267 | dc->flip = 0; | |
1268 | ||
1269 | dc->port[PORT_MDM].token_dl = MDM_DL; | |
1270 | dc->port[PORT_DIAG].token_dl = DIAG_DL; | |
1271 | dc->port[PORT_APP1].token_dl = APP1_DL; | |
1272 | dc->port[PORT_APP2].token_dl = APP2_DL; | |
1273 | ||
1274 | for (i = 0; i < MAX_PORT; i++) | |
1275 | init_waitqueue_head(&dc->port[i].tty_wait); | |
1276 | } | |
1277 | ||
1278 | static ssize_t card_type_show(struct device *dev, struct device_attribute *attr, | |
1279 | char *buf) | |
1280 | { | |
18b1345e | 1281 | const struct nozomi *dc = dev_get_drvdata(dev); |
20fd1e3b FS |
1282 | |
1283 | return sprintf(buf, "%d\n", dc->card_type); | |
1284 | } | |
19467fa1 | 1285 | static DEVICE_ATTR_RO(card_type); |
20fd1e3b FS |
1286 | |
1287 | static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr, | |
1288 | char *buf) | |
1289 | { | |
18b1345e | 1290 | const struct nozomi *dc = dev_get_drvdata(dev); |
20fd1e3b FS |
1291 | |
1292 | return sprintf(buf, "%u\n", dc->open_ttys); | |
1293 | } | |
19467fa1 | 1294 | static DEVICE_ATTR_RO(open_ttys); |
20fd1e3b FS |
1295 | |
1296 | static void make_sysfs_files(struct nozomi *dc) | |
1297 | { | |
1298 | if (device_create_file(&dc->pdev->dev, &dev_attr_card_type)) | |
1299 | dev_err(&dc->pdev->dev, | |
1300 | "Could not create sysfs file for card_type\n"); | |
1301 | if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys)) | |
1302 | dev_err(&dc->pdev->dev, | |
1303 | "Could not create sysfs file for open_ttys\n"); | |
1304 | } | |
1305 | ||
1306 | static void remove_sysfs_files(struct nozomi *dc) | |
1307 | { | |
1308 | device_remove_file(&dc->pdev->dev, &dev_attr_card_type); | |
1309 | device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys); | |
1310 | } | |
1311 | ||
1312 | /* Allocate memory for one device */ | |
9671f099 | 1313 | static int nozomi_card_init(struct pci_dev *pdev, |
20fd1e3b FS |
1314 | const struct pci_device_id *ent) |
1315 | { | |
20fd1e3b FS |
1316 | int ret; |
1317 | struct nozomi *dc = NULL; | |
1318 | int ndev_idx; | |
1319 | int i; | |
1320 | ||
1321 | dev_dbg(&pdev->dev, "Init, new card found\n"); | |
1322 | ||
1323 | for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++) | |
1324 | if (!ndevs[ndev_idx]) | |
1325 | break; | |
1326 | ||
1327 | if (ndev_idx >= ARRAY_SIZE(ndevs)) { | |
1328 | dev_err(&pdev->dev, "no free tty range for this card left\n"); | |
1329 | ret = -EIO; | |
1330 | goto err; | |
1331 | } | |
1332 | ||
1333 | dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL); | |
1334 | if (unlikely(!dc)) { | |
1335 | dev_err(&pdev->dev, "Could not allocate memory\n"); | |
1336 | ret = -ENOMEM; | |
1337 | goto err_free; | |
1338 | } | |
1339 | ||
1340 | dc->pdev = pdev; | |
1341 | ||
20fd1e3b FS |
1342 | ret = pci_enable_device(dc->pdev); |
1343 | if (ret) { | |
1344 | dev_err(&pdev->dev, "Failed to enable PCI Device\n"); | |
1345 | goto err_free; | |
1346 | } | |
1347 | ||
20fd1e3b FS |
1348 | ret = pci_request_regions(dc->pdev, NOZOMI_NAME); |
1349 | if (ret) { | |
1350 | dev_err(&pdev->dev, "I/O address 0x%04x already in use\n", | |
1351 | (int) /* nozomi_private.io_addr */ 0); | |
1352 | goto err_disable_device; | |
1353 | } | |
1354 | ||
661b4e89 FS |
1355 | /* Find out what card type it is */ |
1356 | nozomi_get_card_type(dc); | |
1357 | ||
c392ed46 | 1358 | dc->base_addr = pci_iomap(dc->pdev, 0, dc->card_type); |
20fd1e3b FS |
1359 | if (!dc->base_addr) { |
1360 | dev_err(&pdev->dev, "Unable to map card MMIO\n"); | |
1361 | ret = -ENODEV; | |
1362 | goto err_rel_regs; | |
1363 | } | |
1364 | ||
1365 | dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL); | |
1366 | if (!dc->send_buf) { | |
1367 | dev_err(&pdev->dev, "Could not allocate send buffer?\n"); | |
1368 | ret = -ENOMEM; | |
1369 | goto err_free_sbuf; | |
1370 | } | |
1371 | ||
9842c38e | 1372 | for (i = PORT_MDM; i < MAX_PORT; i++) { |
c29bd8d8 JS |
1373 | if (kfifo_alloc(&dc->port[i].fifo_ul, FIFO_BUFFER_SIZE_UL, |
1374 | GFP_KERNEL)) { | |
9842c38e SS |
1375 | dev_err(&pdev->dev, |
1376 | "Could not allocate kfifo buffer\n"); | |
1377 | ret = -ENOMEM; | |
1378 | goto err_free_kfifo; | |
1379 | } | |
1380 | } | |
1381 | ||
20fd1e3b FS |
1382 | spin_lock_init(&dc->spin_mutex); |
1383 | ||
1384 | nozomi_setup_private_data(dc); | |
1385 | ||
1386 | /* Disable all interrupts */ | |
1387 | dc->last_ier = 0; | |
1388 | writew(dc->last_ier, dc->reg_ier); | |
1389 | ||
1390 | ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED, | |
1391 | NOZOMI_NAME, dc); | |
1392 | if (unlikely(ret)) { | |
1393 | dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq); | |
9842c38e | 1394 | goto err_free_kfifo; |
20fd1e3b FS |
1395 | } |
1396 | ||
1397 | DBG1("base_addr: %p", dc->base_addr); | |
1398 | ||
1399 | make_sysfs_files(dc); | |
1400 | ||
1401 | dc->index_start = ndev_idx * MAX_PORT; | |
1402 | ndevs[ndev_idx] = dc; | |
1403 | ||
661b4e89 FS |
1404 | pci_set_drvdata(pdev, dc); |
1405 | ||
1406 | /* Enable RESET interrupt */ | |
1407 | dc->last_ier = RESET; | |
1408 | iowrite16(dc->last_ier, dc->reg_ier); | |
1409 | ||
1410 | dc->state = NOZOMI_STATE_ENABLED; | |
1411 | ||
20fd1e3b | 1412 | for (i = 0; i < MAX_PORT; i++) { |
9842c38e | 1413 | struct device *tty_dev; |
266794eb AC |
1414 | struct port *port = &dc->port[i]; |
1415 | port->dc = dc; | |
266794eb AC |
1416 | tty_port_init(&port->port); |
1417 | port->port.ops = &noz_tty_port_ops; | |
734cc178 JS |
1418 | tty_dev = tty_port_register_device(&port->port, ntty_driver, |
1419 | dc->index_start + i, &pdev->dev); | |
9842c38e SS |
1420 | |
1421 | if (IS_ERR(tty_dev)) { | |
1422 | ret = PTR_ERR(tty_dev); | |
1423 | dev_err(&pdev->dev, "Could not allocate tty?\n"); | |
191c5f10 | 1424 | tty_port_destroy(&port->port); |
9842c38e SS |
1425 | goto err_free_tty; |
1426 | } | |
20fd1e3b | 1427 | } |
9842c38e | 1428 | |
20fd1e3b FS |
1429 | return 0; |
1430 | ||
9842c38e | 1431 | err_free_tty: |
191c5f10 JS |
1432 | for (i = 0; i < MAX_PORT; ++i) { |
1433 | tty_unregister_device(ntty_driver, dc->index_start + i); | |
1434 | tty_port_destroy(&dc->port[i].port); | |
1435 | } | |
9842c38e SS |
1436 | err_free_kfifo: |
1437 | for (i = 0; i < MAX_PORT; i++) | |
1438 | kfifo_free(&dc->port[i].fifo_ul); | |
20fd1e3b FS |
1439 | err_free_sbuf: |
1440 | kfree(dc->send_buf); | |
1441 | iounmap(dc->base_addr); | |
1442 | err_rel_regs: | |
1443 | pci_release_regions(pdev); | |
1444 | err_disable_device: | |
1445 | pci_disable_device(pdev); | |
1446 | err_free: | |
1447 | kfree(dc); | |
1448 | err: | |
1449 | return ret; | |
1450 | } | |
1451 | ||
ae8d8a14 | 1452 | static void tty_exit(struct nozomi *dc) |
20fd1e3b FS |
1453 | { |
1454 | unsigned int i; | |
1455 | ||
1456 | DBG1(" "); | |
1457 | ||
aa27a094 JS |
1458 | for (i = 0; i < MAX_PORT; ++i) |
1459 | tty_port_tty_hangup(&dc->port[i].port, false); | |
1460 | ||
33dd474a AC |
1461 | /* Racy below - surely should wait for scheduled work to be done or |
1462 | complete off a hangup method ? */ | |
20fd1e3b FS |
1463 | while (dc->open_ttys) |
1464 | msleep(1); | |
191c5f10 JS |
1465 | for (i = 0; i < MAX_PORT; ++i) { |
1466 | tty_unregister_device(ntty_driver, dc->index_start + i); | |
1467 | tty_port_destroy(&dc->port[i].port); | |
1468 | } | |
20fd1e3b FS |
1469 | } |
1470 | ||
1471 | /* Deallocate memory for one device */ | |
ae8d8a14 | 1472 | static void nozomi_card_exit(struct pci_dev *pdev) |
20fd1e3b FS |
1473 | { |
1474 | int i; | |
1475 | struct ctrl_ul ctrl; | |
1476 | struct nozomi *dc = pci_get_drvdata(pdev); | |
1477 | ||
1478 | /* Disable all interrupts */ | |
1479 | dc->last_ier = 0; | |
1480 | writew(dc->last_ier, dc->reg_ier); | |
1481 | ||
1482 | tty_exit(dc); | |
1483 | ||
1484 | /* Send 0x0001, command card to resend the reset token. */ | |
1485 | /* This is to get the reset when the module is reloaded. */ | |
1486 | ctrl.port = 0x00; | |
1487 | ctrl.reserved = 0; | |
1488 | ctrl.RTS = 0; | |
1489 | ctrl.DTR = 1; | |
1490 | DBG1("sending flow control 0x%04X", *((u16 *)&ctrl)); | |
1491 | ||
1492 | /* Setup dc->reg addresses to we can use defines here */ | |
1493 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2); | |
1494 | writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */ | |
1495 | ||
1496 | remove_sysfs_files(dc); | |
1497 | ||
1498 | free_irq(pdev->irq, dc); | |
1499 | ||
1500 | for (i = 0; i < MAX_PORT; i++) | |
45465487 | 1501 | kfifo_free(&dc->port[i].fifo_ul); |
20fd1e3b FS |
1502 | |
1503 | kfree(dc->send_buf); | |
1504 | ||
1505 | iounmap(dc->base_addr); | |
1506 | ||
1507 | pci_release_regions(pdev); | |
1508 | ||
1509 | pci_disable_device(pdev); | |
1510 | ||
1511 | ndevs[dc->index_start / MAX_PORT] = NULL; | |
1512 | ||
1513 | kfree(dc); | |
1514 | } | |
1515 | ||
1516 | static void set_rts(const struct tty_struct *tty, int rts) | |
1517 | { | |
1518 | struct port *port = get_port_by_tty(tty); | |
1519 | ||
1520 | port->ctrl_ul.RTS = rts; | |
1521 | port->update_flow_control = 1; | |
1522 | enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty)); | |
1523 | } | |
1524 | ||
1525 | static void set_dtr(const struct tty_struct *tty, int dtr) | |
1526 | { | |
1527 | struct port *port = get_port_by_tty(tty); | |
1528 | ||
1529 | DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr); | |
1530 | ||
1531 | port->ctrl_ul.DTR = dtr; | |
1532 | port->update_flow_control = 1; | |
1533 | enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty)); | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * ---------------------------------------------------------------------------- | |
1538 | * TTY code | |
1539 | * ---------------------------------------------------------------------------- | |
1540 | */ | |
1541 | ||
266794eb | 1542 | static int ntty_install(struct tty_driver *driver, struct tty_struct *tty) |
20fd1e3b FS |
1543 | { |
1544 | struct port *port = get_port_by_tty(tty); | |
1545 | struct nozomi *dc = get_dc_by_tty(tty); | |
266794eb | 1546 | int ret; |
661b4e89 | 1547 | if (!port || !dc || dc->state != NOZOMI_STATE_READY) |
20fd1e3b | 1548 | return -ENODEV; |
81f5835e JS |
1549 | ret = tty_standard_install(driver, tty); |
1550 | if (ret == 0) | |
bf9c1fca | 1551 | tty->driver_data = port; |
266794eb | 1552 | return ret; |
20fd1e3b FS |
1553 | } |
1554 | ||
266794eb AC |
1555 | static void ntty_cleanup(struct tty_struct *tty) |
1556 | { | |
1557 | tty->driver_data = NULL; | |
1558 | } | |
716da631 | 1559 | |
266794eb | 1560 | static int ntty_activate(struct tty_port *tport, struct tty_struct *tty) |
20fd1e3b | 1561 | { |
266794eb AC |
1562 | struct port *port = container_of(tport, struct port, port); |
1563 | struct nozomi *dc = port->dc; | |
20fd1e3b FS |
1564 | unsigned long flags; |
1565 | ||
266794eb AC |
1566 | DBG1("open: %d", port->token_dl); |
1567 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1568 | dc->last_ier = dc->last_ier | port->token_dl; | |
1569 | writew(dc->last_ier, dc->reg_ier); | |
1570 | dc->open_ttys++; | |
1571 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1572 | printk("noz: activated %d: %p\n", tty->index, tport); | |
1573 | return 0; | |
1574 | } | |
20fd1e3b | 1575 | |
266794eb AC |
1576 | static int ntty_open(struct tty_struct *tty, struct file *filp) |
1577 | { | |
bf9c1fca | 1578 | struct port *port = tty->driver_data; |
266794eb AC |
1579 | return tty_port_open(&port->port, tty, filp); |
1580 | } | |
20fd1e3b | 1581 | |
266794eb AC |
1582 | static void ntty_shutdown(struct tty_port *tport) |
1583 | { | |
1584 | struct port *port = container_of(tport, struct port, port); | |
1585 | struct nozomi *dc = port->dc; | |
1586 | unsigned long flags; | |
20fd1e3b | 1587 | |
266794eb AC |
1588 | DBG1("close: %d", port->token_dl); |
1589 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1590 | dc->last_ier &= ~(port->token_dl); | |
1591 | writew(dc->last_ier, dc->reg_ier); | |
20fd1e3b | 1592 | dc->open_ttys--; |
266794eb AC |
1593 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
1594 | printk("noz: shutdown %p\n", tport); | |
1595 | } | |
20fd1e3b | 1596 | |
266794eb AC |
1597 | static void ntty_close(struct tty_struct *tty, struct file *filp) |
1598 | { | |
1599 | struct port *port = tty->driver_data; | |
1600 | if (port) | |
1601 | tty_port_close(&port->port, tty, filp); | |
1602 | } | |
1603 | ||
1604 | static void ntty_hangup(struct tty_struct *tty) | |
1605 | { | |
1606 | struct port *port = tty->driver_data; | |
1607 | tty_port_hangup(&port->port); | |
20fd1e3b FS |
1608 | } |
1609 | ||
1610 | /* | |
1611 | * called when the userspace process writes to the tty (/dev/noz*). | |
25985edc | 1612 | * Data is inserted into a fifo, which is then read and transferred to the modem. |
20fd1e3b FS |
1613 | */ |
1614 | static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, | |
1615 | int count) | |
1616 | { | |
1617 | int rval = -EINVAL; | |
1618 | struct nozomi *dc = get_dc_by_tty(tty); | |
1619 | struct port *port = tty->driver_data; | |
1620 | unsigned long flags; | |
1621 | ||
1622 | /* DBG1( "WRITEx: %d, index = %d", count, index); */ | |
1623 | ||
1624 | if (!dc || !port) | |
1625 | return -ENODEV; | |
1626 | ||
7acd72eb | 1627 | rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count); |
20fd1e3b | 1628 | |
20fd1e3b FS |
1629 | spin_lock_irqsave(&dc->spin_mutex, flags); |
1630 | /* CTS is only valid on the modem channel */ | |
1631 | if (port == &(dc->port[PORT_MDM])) { | |
1632 | if (port->ctrl_dl.CTS) { | |
1633 | DBG4("Enable interrupt"); | |
1634 | enable_transmit_ul(tty->index % MAX_PORT, dc); | |
1635 | } else { | |
1636 | dev_err(&dc->pdev->dev, | |
1637 | "CTS not active on modem port?\n"); | |
1638 | } | |
1639 | } else { | |
1640 | enable_transmit_ul(tty->index % MAX_PORT, dc); | |
1641 | } | |
1642 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1643 | ||
20fd1e3b FS |
1644 | return rval; |
1645 | } | |
1646 | ||
1647 | /* | |
1648 | * Calculate how much is left in device | |
1649 | * This method is called by the upper tty layer. | |
1650 | * #according to sources N_TTY.c it expects a value >= 0 and | |
1651 | * does not check for negative values. | |
e8c65d14 AC |
1652 | * |
1653 | * If the port is unplugged report lots of room and let the bits | |
1654 | * dribble away so we don't block anything. | |
20fd1e3b FS |
1655 | */ |
1656 | static int ntty_write_room(struct tty_struct *tty) | |
1657 | { | |
1658 | struct port *port = tty->driver_data; | |
e8c65d14 | 1659 | int room = 4096; |
71e1b4ab | 1660 | const struct nozomi *dc = get_dc_by_tty(tty); |
20fd1e3b | 1661 | |
7fdc2893 | 1662 | if (dc) |
6d742f65 | 1663 | room = kfifo_avail(&port->fifo_ul); |
7fdc2893 | 1664 | |
20fd1e3b FS |
1665 | return room; |
1666 | } | |
1667 | ||
1668 | /* Gets io control parameters */ | |
60b33c13 | 1669 | static int ntty_tiocmget(struct tty_struct *tty) |
20fd1e3b | 1670 | { |
71e1b4ab JE |
1671 | const struct port *port = tty->driver_data; |
1672 | const struct ctrl_dl *ctrl_dl = &port->ctrl_dl; | |
1673 | const struct ctrl_ul *ctrl_ul = &port->ctrl_ul; | |
20fd1e3b | 1674 | |
978e595f AC |
1675 | /* Note: these could change under us but it is not clear this |
1676 | matters if so */ | |
c6964e93 JP |
1677 | return (ctrl_ul->RTS ? TIOCM_RTS : 0) |
1678 | | (ctrl_ul->DTR ? TIOCM_DTR : 0) | |
1679 | | (ctrl_dl->DCD ? TIOCM_CAR : 0) | |
1680 | | (ctrl_dl->RI ? TIOCM_RNG : 0) | |
1681 | | (ctrl_dl->DSR ? TIOCM_DSR : 0) | |
1682 | | (ctrl_dl->CTS ? TIOCM_CTS : 0); | |
20fd1e3b FS |
1683 | } |
1684 | ||
1685 | /* Sets io controls parameters */ | |
20b9d177 AC |
1686 | static int ntty_tiocmset(struct tty_struct *tty, |
1687 | unsigned int set, unsigned int clear) | |
20fd1e3b | 1688 | { |
661b4e89 FS |
1689 | struct nozomi *dc = get_dc_by_tty(tty); |
1690 | unsigned long flags; | |
1691 | ||
1692 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
20fd1e3b FS |
1693 | if (set & TIOCM_RTS) |
1694 | set_rts(tty, 1); | |
1695 | else if (clear & TIOCM_RTS) | |
1696 | set_rts(tty, 0); | |
1697 | ||
1698 | if (set & TIOCM_DTR) | |
1699 | set_dtr(tty, 1); | |
1700 | else if (clear & TIOCM_DTR) | |
1701 | set_dtr(tty, 0); | |
661b4e89 | 1702 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
20fd1e3b FS |
1703 | |
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | static int ntty_cflags_changed(struct port *port, unsigned long flags, | |
1708 | struct async_icount *cprev) | |
1709 | { | |
18bbe0c2 | 1710 | const struct async_icount cnow = port->tty_icount; |
20fd1e3b FS |
1711 | int ret; |
1712 | ||
c6964e93 JP |
1713 | ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) |
1714 | || ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) | |
1715 | || ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) | |
1716 | || ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts)); | |
20fd1e3b FS |
1717 | |
1718 | *cprev = cnow; | |
1719 | ||
1720 | return ret; | |
1721 | } | |
1722 | ||
0587102c AC |
1723 | static int ntty_tiocgicount(struct tty_struct *tty, |
1724 | struct serial_icounter_struct *icount) | |
20fd1e3b | 1725 | { |
0587102c | 1726 | struct port *port = tty->driver_data; |
18bbe0c2 | 1727 | const struct async_icount cnow = port->tty_icount; |
0587102c AC |
1728 | |
1729 | icount->cts = cnow.cts; | |
1730 | icount->dsr = cnow.dsr; | |
1731 | icount->rng = cnow.rng; | |
1732 | icount->dcd = cnow.dcd; | |
1733 | icount->rx = cnow.rx; | |
1734 | icount->tx = cnow.tx; | |
1735 | icount->frame = cnow.frame; | |
1736 | icount->overrun = cnow.overrun; | |
1737 | icount->parity = cnow.parity; | |
1738 | icount->brk = cnow.brk; | |
1739 | icount->buf_overrun = cnow.buf_overrun; | |
1740 | return 0; | |
20fd1e3b FS |
1741 | } |
1742 | ||
6caa76b7 | 1743 | static int ntty_ioctl(struct tty_struct *tty, |
20fd1e3b FS |
1744 | unsigned int cmd, unsigned long arg) |
1745 | { | |
1746 | struct port *port = tty->driver_data; | |
20fd1e3b FS |
1747 | int rval = -ENOIOCTLCMD; |
1748 | ||
1749 | DBG1("******** IOCTL, cmd: %d", cmd); | |
1750 | ||
1751 | switch (cmd) { | |
1752 | case TIOCMIWAIT: { | |
1753 | struct async_icount cprev = port->tty_icount; | |
1754 | ||
1755 | rval = wait_event_interruptible(port->tty_wait, | |
1756 | ntty_cflags_changed(port, arg, &cprev)); | |
1757 | break; | |
0587102c | 1758 | } |
20fd1e3b FS |
1759 | default: |
1760 | DBG1("ERR: 0x%08X, %d", cmd, cmd); | |
1761 | break; | |
fc811472 | 1762 | } |
20fd1e3b FS |
1763 | |
1764 | return rval; | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * Called by the upper tty layer when tty buffers are ready | |
1769 | * to receive data again after a call to throttle. | |
1770 | */ | |
1771 | static void ntty_unthrottle(struct tty_struct *tty) | |
1772 | { | |
1773 | struct nozomi *dc = get_dc_by_tty(tty); | |
1774 | unsigned long flags; | |
1775 | ||
1776 | DBG1("UNTHROTTLE"); | |
1777 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1778 | enable_transmit_dl(tty->index % MAX_PORT, dc); | |
1779 | set_rts(tty, 1); | |
1780 | ||
1781 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * Called by the upper tty layer when the tty buffers are almost full. | |
1786 | * The driver should stop send more data. | |
1787 | */ | |
1788 | static void ntty_throttle(struct tty_struct *tty) | |
1789 | { | |
1790 | struct nozomi *dc = get_dc_by_tty(tty); | |
1791 | unsigned long flags; | |
1792 | ||
1793 | DBG1("THROTTLE"); | |
1794 | spin_lock_irqsave(&dc->spin_mutex, flags); | |
1795 | set_rts(tty, 0); | |
1796 | spin_unlock_irqrestore(&dc->spin_mutex, flags); | |
1797 | } | |
1798 | ||
20fd1e3b FS |
1799 | /* Returns number of chars in buffer, called by tty layer */ |
1800 | static s32 ntty_chars_in_buffer(struct tty_struct *tty) | |
1801 | { | |
1802 | struct port *port = tty->driver_data; | |
1803 | struct nozomi *dc = get_dc_by_tty(tty); | |
23198fda | 1804 | s32 rval = 0; |
20fd1e3b FS |
1805 | |
1806 | if (unlikely(!dc || !port)) { | |
20fd1e3b FS |
1807 | goto exit_in_buffer; |
1808 | } | |
1809 | ||
e64c026d | 1810 | rval = kfifo_len(&port->fifo_ul); |
20fd1e3b FS |
1811 | |
1812 | exit_in_buffer: | |
1813 | return rval; | |
1814 | } | |
1815 | ||
266794eb AC |
1816 | static const struct tty_port_operations noz_tty_port_ops = { |
1817 | .activate = ntty_activate, | |
1818 | .shutdown = ntty_shutdown, | |
1819 | }; | |
1820 | ||
18bbe0c2 | 1821 | static const struct tty_operations tty_ops = { |
20fd1e3b FS |
1822 | .ioctl = ntty_ioctl, |
1823 | .open = ntty_open, | |
1824 | .close = ntty_close, | |
266794eb | 1825 | .hangup = ntty_hangup, |
20fd1e3b FS |
1826 | .write = ntty_write, |
1827 | .write_room = ntty_write_room, | |
1828 | .unthrottle = ntty_unthrottle, | |
1829 | .throttle = ntty_throttle, | |
1830 | .chars_in_buffer = ntty_chars_in_buffer, | |
20fd1e3b FS |
1831 | .tiocmget = ntty_tiocmget, |
1832 | .tiocmset = ntty_tiocmset, | |
0587102c | 1833 | .get_icount = ntty_tiocgicount, |
266794eb AC |
1834 | .install = ntty_install, |
1835 | .cleanup = ntty_cleanup, | |
20fd1e3b FS |
1836 | }; |
1837 | ||
1838 | /* Module initialization */ | |
1839 | static struct pci_driver nozomi_driver = { | |
1840 | .name = NOZOMI_NAME, | |
1841 | .id_table = nozomi_pci_tbl, | |
1842 | .probe = nozomi_card_init, | |
91116cba | 1843 | .remove = nozomi_card_exit, |
20fd1e3b FS |
1844 | }; |
1845 | ||
1846 | static __init int nozomi_init(void) | |
1847 | { | |
1848 | int ret; | |
1849 | ||
1850 | printk(KERN_INFO "Initializing %s\n", VERSION_STRING); | |
1851 | ||
1852 | ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS); | |
1853 | if (!ntty_driver) | |
1854 | return -ENOMEM; | |
1855 | ||
20fd1e3b FS |
1856 | ntty_driver->driver_name = NOZOMI_NAME_TTY; |
1857 | ntty_driver->name = "noz"; | |
1858 | ntty_driver->major = 0; | |
1859 | ntty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1860 | ntty_driver->subtype = SERIAL_TYPE_NORMAL; | |
1861 | ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
1862 | ntty_driver->init_termios = tty_std_termios; | |
1863 | ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \ | |
1864 | HUPCL | CLOCAL; | |
1865 | ntty_driver->init_termios.c_ispeed = 115200; | |
1866 | ntty_driver->init_termios.c_ospeed = 115200; | |
1867 | tty_set_operations(ntty_driver, &tty_ops); | |
1868 | ||
1869 | ret = tty_register_driver(ntty_driver); | |
1870 | if (ret) { | |
1871 | printk(KERN_ERR "Nozomi: failed to register ntty driver\n"); | |
1872 | goto free_tty; | |
1873 | } | |
1874 | ||
1875 | ret = pci_register_driver(&nozomi_driver); | |
1876 | if (ret) { | |
1877 | printk(KERN_ERR "Nozomi: can't register pci driver\n"); | |
1878 | goto unr_tty; | |
1879 | } | |
1880 | ||
1881 | return 0; | |
1882 | unr_tty: | |
1883 | tty_unregister_driver(ntty_driver); | |
1884 | free_tty: | |
1885 | put_tty_driver(ntty_driver); | |
1886 | return ret; | |
1887 | } | |
1888 | ||
1889 | static __exit void nozomi_exit(void) | |
1890 | { | |
1891 | printk(KERN_INFO "Unloading %s\n", DRIVER_DESC); | |
1892 | pci_unregister_driver(&nozomi_driver); | |
1893 | tty_unregister_driver(ntty_driver); | |
1894 | put_tty_driver(ntty_driver); | |
1895 | } | |
1896 | ||
1897 | module_init(nozomi_init); | |
1898 | module_exit(nozomi_exit); | |
1899 | ||
20fd1e3b FS |
1900 | MODULE_LICENSE("Dual BSD/GPL"); |
1901 | MODULE_DESCRIPTION(DRIVER_DESC); |