Commit | Line | Data |
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727c26ed PO |
1 | /* |
2 | * linux/drivers/net/wireless/libertas/if_sdio.c | |
3 | * | |
ad3868b2 | 4 | * Copyright 2007-2008 Pierre Ossman |
727c26ed PO |
5 | * |
6 | * Inspired by if_cs.c, Copyright 2007 Holger Schurig | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This hardware has more or less no CMD53 support, so all registers | |
14 | * must be accessed using sdio_readb()/sdio_writeb(). | |
15 | * | |
16 | * Transfers must be in one transaction or the firmware goes bonkers. | |
17 | * This means that the transfer must either be small enough to do a | |
18 | * byte based transfer or it must be padded to a multiple of the | |
19 | * current block size. | |
20 | * | |
21 | * As SDIO is still new to the kernel, it is unfortunately common with | |
7e226272 | 22 | * bugs in the host controllers related to that. One such bug is that |
727c26ed PO |
23 | * controllers cannot do transfers that aren't a multiple of 4 bytes. |
24 | * If you don't have time to fix the host controller driver, you can | |
25 | * work around the problem by modifying if_sdio_host_to_card() and | |
26 | * if_sdio_card_to_host() to pad the data. | |
27 | */ | |
28 | ||
23827926 | 29 | #include <linux/kernel.h> |
727c26ed PO |
30 | #include <linux/moduleparam.h> |
31 | #include <linux/firmware.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/mmc/card.h> | |
35 | #include <linux/mmc/sdio_func.h> | |
36 | #include <linux/mmc/sdio_ids.h> | |
37 | ||
38 | #include "host.h" | |
39 | #include "decl.h" | |
40 | #include "defs.h" | |
41 | #include "dev.h" | |
42 | #include "if_sdio.h" | |
43 | ||
10078321 HS |
44 | static char *lbs_helper_name = NULL; |
45 | module_param_named(helper_name, lbs_helper_name, charp, 0644); | |
727c26ed | 46 | |
10078321 HS |
47 | static char *lbs_fw_name = NULL; |
48 | module_param_named(fw_name, lbs_fw_name, charp, 0644); | |
727c26ed PO |
49 | |
50 | static const struct sdio_device_id if_sdio_ids[] = { | |
51 | { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_LIBERTAS) }, | |
52 | { /* end: all zeroes */ }, | |
53 | }; | |
54 | ||
55 | MODULE_DEVICE_TABLE(sdio, if_sdio_ids); | |
56 | ||
57 | struct if_sdio_model { | |
58 | int model; | |
59 | const char *helper; | |
60 | const char *firmware; | |
61 | }; | |
62 | ||
63 | static struct if_sdio_model if_sdio_models[] = { | |
64 | { | |
65 | /* 8385 */ | |
66 | .model = 0x04, | |
67 | .helper = "sd8385_helper.bin", | |
68 | .firmware = "sd8385.bin", | |
69 | }, | |
70 | { | |
71 | /* 8686 */ | |
72 | .model = 0x0B, | |
73 | .helper = "sd8686_helper.bin", | |
74 | .firmware = "sd8686.bin", | |
75 | }, | |
76 | }; | |
77 | ||
78 | struct if_sdio_packet { | |
79 | struct if_sdio_packet *next; | |
80 | u16 nb; | |
81 | u8 buffer[0] __attribute__((aligned(4))); | |
82 | }; | |
83 | ||
84 | struct if_sdio_card { | |
85 | struct sdio_func *func; | |
69f9032d | 86 | struct lbs_private *priv; |
727c26ed PO |
87 | |
88 | int model; | |
89 | unsigned long ioport; | |
90 | ||
91 | const char *helper; | |
92 | const char *firmware; | |
93 | ||
94 | u8 buffer[65536]; | |
727c26ed PO |
95 | |
96 | spinlock_t lock; | |
97 | struct if_sdio_packet *packets; | |
98 | struct work_struct packet_worker; | |
99 | }; | |
100 | ||
101 | /********************************************************************/ | |
102 | /* I/O */ | |
103 | /********************************************************************/ | |
104 | ||
105 | static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err) | |
106 | { | |
107 | int ret, reg; | |
108 | u16 scratch; | |
109 | ||
110 | if (card->model == 0x04) | |
111 | reg = IF_SDIO_SCRATCH_OLD; | |
112 | else | |
113 | reg = IF_SDIO_SCRATCH; | |
114 | ||
115 | scratch = sdio_readb(card->func, reg, &ret); | |
116 | if (!ret) | |
117 | scratch |= sdio_readb(card->func, reg + 1, &ret) << 8; | |
118 | ||
119 | if (err) | |
120 | *err = ret; | |
121 | ||
122 | if (ret) | |
123 | return 0xffff; | |
124 | ||
125 | return scratch; | |
126 | } | |
127 | ||
128 | static int if_sdio_handle_cmd(struct if_sdio_card *card, | |
129 | u8 *buffer, unsigned size) | |
130 | { | |
7919b89c | 131 | struct lbs_private *priv = card->priv; |
727c26ed PO |
132 | int ret; |
133 | unsigned long flags; | |
7919b89c | 134 | u8 i; |
727c26ed PO |
135 | |
136 | lbs_deb_enter(LBS_DEB_SDIO); | |
137 | ||
ddac4526 | 138 | if (size > LBS_CMD_BUFFER_SIZE) { |
727c26ed PO |
139 | lbs_deb_sdio("response packet too large (%d bytes)\n", |
140 | (int)size); | |
141 | ret = -E2BIG; | |
142 | goto out; | |
143 | } | |
144 | ||
7919b89c | 145 | spin_lock_irqsave(&priv->driver_lock, flags); |
727c26ed | 146 | |
7919b89c HS |
147 | i = (priv->resp_idx == 0) ? 1 : 0; |
148 | BUG_ON(priv->resp_len[i]); | |
149 | priv->resp_len[i] = size; | |
150 | memcpy(priv->resp_buf[i], buffer, size); | |
151 | lbs_notify_command_response(priv, i); | |
727c26ed | 152 | |
7919b89c | 153 | spin_unlock_irqrestore(&card->priv->driver_lock, flags); |
727c26ed PO |
154 | |
155 | ret = 0; | |
156 | ||
157 | out: | |
727c26ed | 158 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); |
727c26ed PO |
159 | return ret; |
160 | } | |
161 | ||
162 | static int if_sdio_handle_data(struct if_sdio_card *card, | |
163 | u8 *buffer, unsigned size) | |
164 | { | |
165 | int ret; | |
166 | struct sk_buff *skb; | |
167 | char *data; | |
168 | ||
169 | lbs_deb_enter(LBS_DEB_SDIO); | |
170 | ||
171 | if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
172 | lbs_deb_sdio("response packet too large (%d bytes)\n", | |
173 | (int)size); | |
174 | ret = -E2BIG; | |
175 | goto out; | |
176 | } | |
177 | ||
51e6b712 | 178 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN); |
727c26ed PO |
179 | if (!skb) { |
180 | ret = -ENOMEM; | |
181 | goto out; | |
182 | } | |
183 | ||
51e6b712 PO |
184 | skb_reserve(skb, NET_IP_ALIGN); |
185 | ||
727c26ed PO |
186 | data = skb_put(skb, size); |
187 | ||
188 | memcpy(data, buffer, size); | |
189 | ||
10078321 | 190 | lbs_process_rxed_packet(card->priv, skb); |
727c26ed PO |
191 | |
192 | ret = 0; | |
193 | ||
194 | out: | |
195 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
196 | ||
197 | return ret; | |
198 | } | |
199 | ||
200 | static int if_sdio_handle_event(struct if_sdio_card *card, | |
201 | u8 *buffer, unsigned size) | |
202 | { | |
203 | int ret; | |
727c26ed PO |
204 | u32 event; |
205 | ||
206 | lbs_deb_enter(LBS_DEB_SDIO); | |
207 | ||
208 | if (card->model == 0x04) { | |
209 | event = sdio_readb(card->func, IF_SDIO_EVENT, &ret); | |
210 | if (ret) | |
211 | goto out; | |
212 | } else { | |
213 | if (size < 4) { | |
214 | lbs_deb_sdio("event packet too small (%d bytes)\n", | |
215 | (int)size); | |
216 | ret = -EINVAL; | |
217 | goto out; | |
218 | } | |
219 | event = buffer[3] << 24; | |
220 | event |= buffer[2] << 16; | |
221 | event |= buffer[1] << 8; | |
222 | event |= buffer[0] << 0; | |
727c26ed PO |
223 | } |
224 | ||
7919b89c | 225 | lbs_queue_event(card->priv, event & 0xFF); |
727c26ed PO |
226 | ret = 0; |
227 | ||
228 | out: | |
229 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
230 | ||
231 | return ret; | |
232 | } | |
233 | ||
234 | static int if_sdio_card_to_host(struct if_sdio_card *card) | |
235 | { | |
236 | int ret; | |
237 | u8 status; | |
238 | u16 size, type, chunk; | |
239 | unsigned long timeout; | |
240 | ||
241 | lbs_deb_enter(LBS_DEB_SDIO); | |
242 | ||
243 | size = if_sdio_read_scratch(card, &ret); | |
244 | if (ret) | |
245 | goto out; | |
246 | ||
247 | if (size < 4) { | |
248 | lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n", | |
249 | (int)size); | |
250 | ret = -EINVAL; | |
251 | goto out; | |
252 | } | |
253 | ||
254 | timeout = jiffies + HZ; | |
255 | while (1) { | |
256 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
257 | if (ret) | |
258 | goto out; | |
259 | if (status & IF_SDIO_IO_RDY) | |
260 | break; | |
261 | if (time_after(jiffies, timeout)) { | |
262 | ret = -ETIMEDOUT; | |
263 | goto out; | |
264 | } | |
265 | mdelay(1); | |
266 | } | |
267 | ||
268 | /* | |
269 | * The transfer must be in one transaction or the firmware | |
ad3868b2 PO |
270 | * goes suicidal. There's no way to guarantee that for all |
271 | * controllers, but we can at least try. | |
727c26ed | 272 | */ |
ad3868b2 | 273 | chunk = sdio_align_size(card->func, size); |
727c26ed PO |
274 | |
275 | ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk); | |
276 | if (ret) | |
277 | goto out; | |
278 | ||
279 | chunk = card->buffer[0] | (card->buffer[1] << 8); | |
280 | type = card->buffer[2] | (card->buffer[3] << 8); | |
281 | ||
282 | lbs_deb_sdio("packet of type %d and size %d bytes\n", | |
283 | (int)type, (int)chunk); | |
284 | ||
285 | if (chunk > size) { | |
286 | lbs_deb_sdio("packet fragment (%d > %d)\n", | |
287 | (int)chunk, (int)size); | |
288 | ret = -EINVAL; | |
289 | goto out; | |
290 | } | |
291 | ||
292 | if (chunk < size) { | |
293 | lbs_deb_sdio("packet fragment (%d < %d)\n", | |
294 | (int)chunk, (int)size); | |
295 | } | |
296 | ||
297 | switch (type) { | |
298 | case MVMS_CMD: | |
299 | ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4); | |
300 | if (ret) | |
301 | goto out; | |
302 | break; | |
303 | case MVMS_DAT: | |
304 | ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4); | |
305 | if (ret) | |
306 | goto out; | |
307 | break; | |
308 | case MVMS_EVENT: | |
309 | ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4); | |
310 | if (ret) | |
311 | goto out; | |
312 | break; | |
313 | default: | |
314 | lbs_deb_sdio("invalid type (%d) from firmware\n", | |
315 | (int)type); | |
316 | ret = -EINVAL; | |
317 | goto out; | |
318 | } | |
319 | ||
320 | out: | |
321 | if (ret) | |
322 | lbs_pr_err("problem fetching packet from firmware\n"); | |
323 | ||
324 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
325 | ||
326 | return ret; | |
327 | } | |
328 | ||
329 | static void if_sdio_host_to_card_worker(struct work_struct *work) | |
330 | { | |
331 | struct if_sdio_card *card; | |
332 | struct if_sdio_packet *packet; | |
333 | unsigned long timeout; | |
334 | u8 status; | |
335 | int ret; | |
336 | unsigned long flags; | |
337 | ||
338 | lbs_deb_enter(LBS_DEB_SDIO); | |
339 | ||
340 | card = container_of(work, struct if_sdio_card, packet_worker); | |
341 | ||
342 | while (1) { | |
343 | spin_lock_irqsave(&card->lock, flags); | |
344 | packet = card->packets; | |
345 | if (packet) | |
346 | card->packets = packet->next; | |
347 | spin_unlock_irqrestore(&card->lock, flags); | |
348 | ||
349 | if (!packet) | |
350 | break; | |
351 | ||
352 | sdio_claim_host(card->func); | |
353 | ||
354 | timeout = jiffies + HZ; | |
355 | while (1) { | |
356 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
357 | if (ret) | |
358 | goto release; | |
359 | if (status & IF_SDIO_IO_RDY) | |
360 | break; | |
361 | if (time_after(jiffies, timeout)) { | |
362 | ret = -ETIMEDOUT; | |
363 | goto release; | |
364 | } | |
365 | mdelay(1); | |
366 | } | |
367 | ||
368 | ret = sdio_writesb(card->func, card->ioport, | |
369 | packet->buffer, packet->nb); | |
370 | if (ret) | |
371 | goto release; | |
372 | release: | |
373 | sdio_release_host(card->func); | |
374 | ||
375 | kfree(packet); | |
376 | } | |
377 | ||
378 | lbs_deb_leave(LBS_DEB_SDIO); | |
379 | } | |
380 | ||
381 | /********************************************************************/ | |
382 | /* Firmware */ | |
383 | /********************************************************************/ | |
384 | ||
385 | static int if_sdio_prog_helper(struct if_sdio_card *card) | |
386 | { | |
387 | int ret; | |
388 | u8 status; | |
389 | const struct firmware *fw; | |
390 | unsigned long timeout; | |
391 | u8 *chunk_buffer; | |
392 | u32 chunk_size; | |
6dfff895 | 393 | const u8 *firmware; |
727c26ed PO |
394 | size_t size; |
395 | ||
396 | lbs_deb_enter(LBS_DEB_SDIO); | |
397 | ||
398 | ret = request_firmware(&fw, card->helper, &card->func->dev); | |
399 | if (ret) { | |
400 | lbs_pr_err("can't load helper firmware\n"); | |
401 | goto out; | |
402 | } | |
403 | ||
404 | chunk_buffer = kzalloc(64, GFP_KERNEL); | |
405 | if (!chunk_buffer) { | |
406 | ret = -ENOMEM; | |
407 | goto release_fw; | |
408 | } | |
409 | ||
410 | sdio_claim_host(card->func); | |
411 | ||
412 | ret = sdio_set_block_size(card->func, 32); | |
413 | if (ret) | |
414 | goto release; | |
415 | ||
416 | firmware = fw->data; | |
417 | size = fw->size; | |
418 | ||
419 | while (size) { | |
420 | timeout = jiffies + HZ; | |
421 | while (1) { | |
422 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
423 | if (ret) | |
424 | goto release; | |
425 | if ((status & IF_SDIO_IO_RDY) && | |
426 | (status & IF_SDIO_DL_RDY)) | |
427 | break; | |
428 | if (time_after(jiffies, timeout)) { | |
429 | ret = -ETIMEDOUT; | |
430 | goto release; | |
431 | } | |
432 | mdelay(1); | |
433 | } | |
434 | ||
435 | chunk_size = min(size, (size_t)60); | |
436 | ||
c2df2efe | 437 | *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size); |
727c26ed PO |
438 | memcpy(chunk_buffer + 4, firmware, chunk_size); |
439 | /* | |
440 | lbs_deb_sdio("sending %d bytes chunk\n", chunk_size); | |
441 | */ | |
442 | ret = sdio_writesb(card->func, card->ioport, | |
443 | chunk_buffer, 64); | |
444 | if (ret) | |
445 | goto release; | |
446 | ||
447 | firmware += chunk_size; | |
448 | size -= chunk_size; | |
449 | } | |
450 | ||
451 | /* an empty block marks the end of the transfer */ | |
452 | memset(chunk_buffer, 0, 4); | |
453 | ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64); | |
454 | if (ret) | |
455 | goto release; | |
456 | ||
457 | lbs_deb_sdio("waiting for helper to boot...\n"); | |
458 | ||
459 | /* wait for the helper to boot by looking at the size register */ | |
460 | timeout = jiffies + HZ; | |
461 | while (1) { | |
462 | u16 req_size; | |
463 | ||
464 | req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret); | |
465 | if (ret) | |
466 | goto release; | |
467 | ||
468 | req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8; | |
469 | if (ret) | |
470 | goto release; | |
471 | ||
472 | if (req_size != 0) | |
473 | break; | |
474 | ||
475 | if (time_after(jiffies, timeout)) { | |
476 | ret = -ETIMEDOUT; | |
477 | goto release; | |
478 | } | |
479 | ||
480 | msleep(10); | |
481 | } | |
482 | ||
483 | ret = 0; | |
484 | ||
485 | release: | |
486 | sdio_set_block_size(card->func, 0); | |
487 | sdio_release_host(card->func); | |
488 | kfree(chunk_buffer); | |
489 | release_fw: | |
490 | release_firmware(fw); | |
491 | ||
492 | out: | |
493 | if (ret) | |
494 | lbs_pr_err("failed to load helper firmware\n"); | |
495 | ||
496 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
501 | static int if_sdio_prog_real(struct if_sdio_card *card) | |
502 | { | |
503 | int ret; | |
504 | u8 status; | |
505 | const struct firmware *fw; | |
506 | unsigned long timeout; | |
507 | u8 *chunk_buffer; | |
508 | u32 chunk_size; | |
6dfff895 | 509 | const u8 *firmware; |
727c26ed PO |
510 | size_t size, req_size; |
511 | ||
512 | lbs_deb_enter(LBS_DEB_SDIO); | |
513 | ||
514 | ret = request_firmware(&fw, card->firmware, &card->func->dev); | |
515 | if (ret) { | |
516 | lbs_pr_err("can't load firmware\n"); | |
517 | goto out; | |
518 | } | |
519 | ||
520 | chunk_buffer = kzalloc(512, GFP_KERNEL); | |
521 | if (!chunk_buffer) { | |
522 | ret = -ENOMEM; | |
523 | goto release_fw; | |
524 | } | |
525 | ||
526 | sdio_claim_host(card->func); | |
527 | ||
528 | ret = sdio_set_block_size(card->func, 32); | |
529 | if (ret) | |
530 | goto release; | |
531 | ||
532 | firmware = fw->data; | |
533 | size = fw->size; | |
534 | ||
535 | while (size) { | |
536 | timeout = jiffies + HZ; | |
537 | while (1) { | |
538 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
539 | if (ret) | |
540 | goto release; | |
541 | if ((status & IF_SDIO_IO_RDY) && | |
542 | (status & IF_SDIO_DL_RDY)) | |
543 | break; | |
544 | if (time_after(jiffies, timeout)) { | |
545 | ret = -ETIMEDOUT; | |
546 | goto release; | |
547 | } | |
548 | mdelay(1); | |
549 | } | |
550 | ||
551 | req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret); | |
552 | if (ret) | |
553 | goto release; | |
554 | ||
555 | req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8; | |
556 | if (ret) | |
557 | goto release; | |
558 | /* | |
559 | lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size); | |
560 | */ | |
561 | if (req_size == 0) { | |
562 | lbs_deb_sdio("firmware helper gave up early\n"); | |
563 | ret = -EIO; | |
564 | goto release; | |
565 | } | |
566 | ||
567 | if (req_size & 0x01) { | |
568 | lbs_deb_sdio("firmware helper signalled error\n"); | |
569 | ret = -EIO; | |
570 | goto release; | |
571 | } | |
572 | ||
573 | if (req_size > size) | |
574 | req_size = size; | |
575 | ||
576 | while (req_size) { | |
577 | chunk_size = min(req_size, (size_t)512); | |
578 | ||
579 | memcpy(chunk_buffer, firmware, chunk_size); | |
580 | /* | |
581 | lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n", | |
582 | chunk_size, (chunk_size + 31) / 32 * 32); | |
583 | */ | |
584 | ret = sdio_writesb(card->func, card->ioport, | |
23827926 | 585 | chunk_buffer, roundup(chunk_size, 32)); |
727c26ed PO |
586 | if (ret) |
587 | goto release; | |
588 | ||
589 | firmware += chunk_size; | |
590 | size -= chunk_size; | |
591 | req_size -= chunk_size; | |
592 | } | |
593 | } | |
594 | ||
595 | ret = 0; | |
596 | ||
597 | lbs_deb_sdio("waiting for firmware to boot...\n"); | |
598 | ||
599 | /* wait for the firmware to boot */ | |
600 | timeout = jiffies + HZ; | |
601 | while (1) { | |
602 | u16 scratch; | |
603 | ||
604 | scratch = if_sdio_read_scratch(card, &ret); | |
605 | if (ret) | |
606 | goto release; | |
607 | ||
608 | if (scratch == IF_SDIO_FIRMWARE_OK) | |
609 | break; | |
610 | ||
611 | if (time_after(jiffies, timeout)) { | |
612 | ret = -ETIMEDOUT; | |
613 | goto release; | |
614 | } | |
615 | ||
616 | msleep(10); | |
617 | } | |
618 | ||
619 | ret = 0; | |
620 | ||
621 | release: | |
622 | sdio_set_block_size(card->func, 0); | |
623 | sdio_release_host(card->func); | |
624 | kfree(chunk_buffer); | |
625 | release_fw: | |
626 | release_firmware(fw); | |
627 | ||
628 | out: | |
629 | if (ret) | |
630 | lbs_pr_err("failed to load firmware\n"); | |
631 | ||
632 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
633 | ||
634 | return ret; | |
635 | } | |
636 | ||
637 | static int if_sdio_prog_firmware(struct if_sdio_card *card) | |
638 | { | |
639 | int ret; | |
640 | u16 scratch; | |
641 | ||
642 | lbs_deb_enter(LBS_DEB_SDIO); | |
643 | ||
644 | sdio_claim_host(card->func); | |
645 | scratch = if_sdio_read_scratch(card, &ret); | |
646 | sdio_release_host(card->func); | |
647 | ||
648 | if (ret) | |
649 | goto out; | |
650 | ||
651 | if (scratch == IF_SDIO_FIRMWARE_OK) { | |
652 | lbs_deb_sdio("firmware already loaded\n"); | |
653 | goto success; | |
654 | } | |
655 | ||
656 | ret = if_sdio_prog_helper(card); | |
657 | if (ret) | |
658 | goto out; | |
659 | ||
660 | ret = if_sdio_prog_real(card); | |
661 | if (ret) | |
662 | goto out; | |
663 | ||
664 | success: | |
665 | ret = 0; | |
666 | ||
667 | out: | |
668 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
669 | ||
670 | return ret; | |
671 | } | |
672 | ||
673 | /*******************************************************************/ | |
674 | /* Libertas callbacks */ | |
675 | /*******************************************************************/ | |
676 | ||
69f9032d HS |
677 | static int if_sdio_host_to_card(struct lbs_private *priv, |
678 | u8 type, u8 *buf, u16 nb) | |
727c26ed PO |
679 | { |
680 | int ret; | |
681 | struct if_sdio_card *card; | |
682 | struct if_sdio_packet *packet, *cur; | |
683 | u16 size; | |
684 | unsigned long flags; | |
685 | ||
686 | lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb); | |
687 | ||
688 | card = priv->card; | |
689 | ||
690 | if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) { | |
691 | ret = -EINVAL; | |
692 | goto out; | |
693 | } | |
694 | ||
695 | /* | |
696 | * The transfer must be in one transaction or the firmware | |
ad3868b2 PO |
697 | * goes suicidal. There's no way to guarantee that for all |
698 | * controllers, but we can at least try. | |
727c26ed | 699 | */ |
ad3868b2 | 700 | size = sdio_align_size(card->func, nb + 4); |
727c26ed PO |
701 | |
702 | packet = kzalloc(sizeof(struct if_sdio_packet) + size, | |
703 | GFP_ATOMIC); | |
704 | if (!packet) { | |
705 | ret = -ENOMEM; | |
706 | goto out; | |
707 | } | |
708 | ||
709 | packet->next = NULL; | |
710 | packet->nb = size; | |
711 | ||
712 | /* | |
713 | * SDIO specific header. | |
714 | */ | |
715 | packet->buffer[0] = (nb + 4) & 0xff; | |
716 | packet->buffer[1] = ((nb + 4) >> 8) & 0xff; | |
717 | packet->buffer[2] = type; | |
718 | packet->buffer[3] = 0; | |
719 | ||
720 | memcpy(packet->buffer + 4, buf, nb); | |
721 | ||
722 | spin_lock_irqsave(&card->lock, flags); | |
723 | ||
724 | if (!card->packets) | |
725 | card->packets = packet; | |
726 | else { | |
727 | cur = card->packets; | |
728 | while (cur->next) | |
729 | cur = cur->next; | |
730 | cur->next = packet; | |
731 | } | |
732 | ||
733 | switch (type) { | |
734 | case MVMS_CMD: | |
735 | priv->dnld_sent = DNLD_CMD_SENT; | |
736 | break; | |
737 | case MVMS_DAT: | |
738 | priv->dnld_sent = DNLD_DATA_SENT; | |
739 | break; | |
740 | default: | |
741 | lbs_deb_sdio("unknown packet type %d\n", (int)type); | |
742 | } | |
743 | ||
744 | spin_unlock_irqrestore(&card->lock, flags); | |
745 | ||
746 | schedule_work(&card->packet_worker); | |
747 | ||
748 | ret = 0; | |
749 | ||
750 | out: | |
751 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
752 | ||
753 | return ret; | |
754 | } | |
755 | ||
727c26ed PO |
756 | /*******************************************************************/ |
757 | /* SDIO callbacks */ | |
758 | /*******************************************************************/ | |
759 | ||
760 | static void if_sdio_interrupt(struct sdio_func *func) | |
761 | { | |
762 | int ret; | |
763 | struct if_sdio_card *card; | |
764 | u8 cause; | |
765 | ||
766 | lbs_deb_enter(LBS_DEB_SDIO); | |
767 | ||
768 | card = sdio_get_drvdata(func); | |
769 | ||
770 | cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret); | |
771 | if (ret) | |
772 | goto out; | |
773 | ||
774 | lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause); | |
775 | ||
776 | sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret); | |
777 | if (ret) | |
778 | goto out; | |
779 | ||
780 | /* | |
781 | * Ignore the define name, this really means the card has | |
782 | * successfully received the command. | |
783 | */ | |
e775ed7c DW |
784 | if (cause & IF_SDIO_H_INT_DNLD) |
785 | lbs_host_to_card_done(card->priv); | |
786 | ||
727c26ed PO |
787 | |
788 | if (cause & IF_SDIO_H_INT_UPLD) { | |
789 | ret = if_sdio_card_to_host(card); | |
790 | if (ret) | |
791 | goto out; | |
792 | } | |
793 | ||
794 | ret = 0; | |
795 | ||
796 | out: | |
797 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
798 | } | |
799 | ||
800 | static int if_sdio_probe(struct sdio_func *func, | |
801 | const struct sdio_device_id *id) | |
802 | { | |
803 | struct if_sdio_card *card; | |
69f9032d | 804 | struct lbs_private *priv; |
727c26ed PO |
805 | int ret, i; |
806 | unsigned int model; | |
807 | struct if_sdio_packet *packet; | |
808 | ||
809 | lbs_deb_enter(LBS_DEB_SDIO); | |
810 | ||
811 | for (i = 0;i < func->card->num_info;i++) { | |
812 | if (sscanf(func->card->info[i], | |
813 | "802.11 SDIO ID: %x", &model) == 1) | |
814 | break; | |
815 | if (sscanf(func->card->info[i], | |
816 | "ID: %x", &model) == 1) | |
817 | break; | |
436c8854 MP |
818 | if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) { |
819 | model = 4; | |
820 | break; | |
821 | } | |
727c26ed PO |
822 | } |
823 | ||
824 | if (i == func->card->num_info) { | |
825 | lbs_pr_err("unable to identify card model\n"); | |
826 | return -ENODEV; | |
827 | } | |
828 | ||
829 | card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL); | |
830 | if (!card) | |
831 | return -ENOMEM; | |
832 | ||
833 | card->func = func; | |
834 | card->model = model; | |
835 | spin_lock_init(&card->lock); | |
836 | INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker); | |
837 | ||
838 | for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) { | |
839 | if (card->model == if_sdio_models[i].model) | |
840 | break; | |
841 | } | |
842 | ||
843 | if (i == ARRAY_SIZE(if_sdio_models)) { | |
844 | lbs_pr_err("unkown card model 0x%x\n", card->model); | |
845 | ret = -ENODEV; | |
846 | goto free; | |
847 | } | |
848 | ||
849 | card->helper = if_sdio_models[i].helper; | |
850 | card->firmware = if_sdio_models[i].firmware; | |
851 | ||
10078321 | 852 | if (lbs_helper_name) { |
727c26ed | 853 | lbs_deb_sdio("overriding helper firmware: %s\n", |
10078321 HS |
854 | lbs_helper_name); |
855 | card->helper = lbs_helper_name; | |
727c26ed PO |
856 | } |
857 | ||
10078321 HS |
858 | if (lbs_fw_name) { |
859 | lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name); | |
860 | card->firmware = lbs_fw_name; | |
727c26ed PO |
861 | } |
862 | ||
863 | sdio_claim_host(func); | |
864 | ||
865 | ret = sdio_enable_func(func); | |
866 | if (ret) | |
867 | goto release; | |
868 | ||
869 | ret = sdio_claim_irq(func, if_sdio_interrupt); | |
870 | if (ret) | |
871 | goto disable; | |
872 | ||
873 | card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret); | |
874 | if (ret) | |
875 | goto release_int; | |
876 | ||
877 | card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8; | |
878 | if (ret) | |
879 | goto release_int; | |
880 | ||
881 | card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16; | |
882 | if (ret) | |
883 | goto release_int; | |
884 | ||
885 | sdio_release_host(func); | |
886 | ||
887 | sdio_set_drvdata(func, card); | |
888 | ||
889 | lbs_deb_sdio("class = 0x%X, vendor = 0x%X, " | |
890 | "device = 0x%X, model = 0x%X, ioport = 0x%X\n", | |
891 | func->class, func->vendor, func->device, | |
892 | model, (unsigned)card->ioport); | |
893 | ||
894 | ret = if_sdio_prog_firmware(card); | |
895 | if (ret) | |
896 | goto reclaim; | |
897 | ||
10078321 | 898 | priv = lbs_add_card(card, &func->dev); |
727c26ed PO |
899 | if (!priv) { |
900 | ret = -ENOMEM; | |
901 | goto reclaim; | |
902 | } | |
903 | ||
904 | card->priv = priv; | |
905 | ||
906 | priv->card = card; | |
907 | priv->hw_host_to_card = if_sdio_host_to_card; | |
727c26ed | 908 | |
aa21c004 | 909 | priv->fw_ready = 1; |
727c26ed PO |
910 | |
911 | /* | |
912 | * Enable interrupts now that everything is set up | |
913 | */ | |
914 | sdio_claim_host(func); | |
915 | sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret); | |
916 | sdio_release_host(func); | |
917 | if (ret) | |
918 | goto reclaim; | |
919 | ||
10078321 | 920 | ret = lbs_start_card(priv); |
727c26ed PO |
921 | if (ret) |
922 | goto err_activate_card; | |
923 | ||
924 | out: | |
925 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
926 | ||
927 | return ret; | |
928 | ||
929 | err_activate_card: | |
930 | flush_scheduled_work(); | |
931 | free_netdev(priv->dev); | |
aa21c004 | 932 | kfree(priv); |
727c26ed PO |
933 | reclaim: |
934 | sdio_claim_host(func); | |
935 | release_int: | |
936 | sdio_release_irq(func); | |
937 | disable: | |
938 | sdio_disable_func(func); | |
939 | release: | |
940 | sdio_release_host(func); | |
941 | free: | |
942 | while (card->packets) { | |
943 | packet = card->packets; | |
944 | card->packets = card->packets->next; | |
945 | kfree(packet); | |
946 | } | |
947 | ||
948 | kfree(card); | |
949 | ||
950 | goto out; | |
951 | } | |
952 | ||
953 | static void if_sdio_remove(struct sdio_func *func) | |
954 | { | |
955 | struct if_sdio_card *card; | |
956 | struct if_sdio_packet *packet; | |
957 | ||
958 | lbs_deb_enter(LBS_DEB_SDIO); | |
959 | ||
960 | card = sdio_get_drvdata(func); | |
961 | ||
aa21c004 | 962 | card->priv->surpriseremoved = 1; |
727c26ed PO |
963 | |
964 | lbs_deb_sdio("call remove card\n"); | |
10078321 HS |
965 | lbs_stop_card(card->priv); |
966 | lbs_remove_card(card->priv); | |
727c26ed PO |
967 | |
968 | flush_scheduled_work(); | |
969 | ||
970 | sdio_claim_host(func); | |
971 | sdio_release_irq(func); | |
972 | sdio_disable_func(func); | |
973 | sdio_release_host(func); | |
974 | ||
975 | while (card->packets) { | |
976 | packet = card->packets; | |
977 | card->packets = card->packets->next; | |
978 | kfree(packet); | |
979 | } | |
980 | ||
981 | kfree(card); | |
982 | ||
983 | lbs_deb_leave(LBS_DEB_SDIO); | |
984 | } | |
985 | ||
986 | static struct sdio_driver if_sdio_driver = { | |
987 | .name = "libertas_sdio", | |
988 | .id_table = if_sdio_ids, | |
989 | .probe = if_sdio_probe, | |
990 | .remove = if_sdio_remove, | |
991 | }; | |
992 | ||
993 | /*******************************************************************/ | |
994 | /* Module functions */ | |
995 | /*******************************************************************/ | |
996 | ||
4fb910fd | 997 | static int __init if_sdio_init_module(void) |
727c26ed PO |
998 | { |
999 | int ret = 0; | |
1000 | ||
1001 | lbs_deb_enter(LBS_DEB_SDIO); | |
1002 | ||
1003 | printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n"); | |
1004 | printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n"); | |
1005 | ||
1006 | ret = sdio_register_driver(&if_sdio_driver); | |
1007 | ||
1008 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
1009 | ||
1010 | return ret; | |
1011 | } | |
1012 | ||
4fb910fd | 1013 | static void __exit if_sdio_exit_module(void) |
727c26ed PO |
1014 | { |
1015 | lbs_deb_enter(LBS_DEB_SDIO); | |
1016 | ||
1017 | sdio_unregister_driver(&if_sdio_driver); | |
1018 | ||
1019 | lbs_deb_leave(LBS_DEB_SDIO); | |
1020 | } | |
1021 | ||
1022 | module_init(if_sdio_init_module); | |
1023 | module_exit(if_sdio_exit_module); | |
1024 | ||
1025 | MODULE_DESCRIPTION("Libertas SDIO WLAN Driver"); | |
1026 | MODULE_AUTHOR("Pierre Ossman"); | |
1027 | MODULE_LICENSE("GPL"); |