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727c26ed PO |
1 | /* |
2 | * linux/drivers/net/wireless/libertas/if_sdio.c | |
3 | * | |
4 | * Copyright 2007 Pierre Ossman | |
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 | ||
29 | #include <linux/moduleparam.h> | |
30 | #include <linux/firmware.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/mmc/card.h> | |
34 | #include <linux/mmc/sdio_func.h> | |
35 | #include <linux/mmc/sdio_ids.h> | |
36 | ||
37 | #include "host.h" | |
38 | #include "decl.h" | |
39 | #include "defs.h" | |
40 | #include "dev.h" | |
41 | #include "if_sdio.h" | |
42 | ||
10078321 HS |
43 | static char *lbs_helper_name = NULL; |
44 | module_param_named(helper_name, lbs_helper_name, charp, 0644); | |
727c26ed | 45 | |
10078321 HS |
46 | static char *lbs_fw_name = NULL; |
47 | module_param_named(fw_name, lbs_fw_name, charp, 0644); | |
727c26ed PO |
48 | |
49 | static const struct sdio_device_id if_sdio_ids[] = { | |
50 | { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_LIBERTAS) }, | |
51 | { /* end: all zeroes */ }, | |
52 | }; | |
53 | ||
54 | MODULE_DEVICE_TABLE(sdio, if_sdio_ids); | |
55 | ||
56 | struct if_sdio_model { | |
57 | int model; | |
58 | const char *helper; | |
59 | const char *firmware; | |
60 | }; | |
61 | ||
62 | static struct if_sdio_model if_sdio_models[] = { | |
63 | { | |
64 | /* 8385 */ | |
65 | .model = 0x04, | |
66 | .helper = "sd8385_helper.bin", | |
67 | .firmware = "sd8385.bin", | |
68 | }, | |
69 | { | |
70 | /* 8686 */ | |
71 | .model = 0x0B, | |
72 | .helper = "sd8686_helper.bin", | |
73 | .firmware = "sd8686.bin", | |
74 | }, | |
75 | }; | |
76 | ||
77 | struct if_sdio_packet { | |
78 | struct if_sdio_packet *next; | |
79 | u16 nb; | |
80 | u8 buffer[0] __attribute__((aligned(4))); | |
81 | }; | |
82 | ||
83 | struct if_sdio_card { | |
84 | struct sdio_func *func; | |
69f9032d | 85 | struct lbs_private *priv; |
727c26ed PO |
86 | |
87 | int model; | |
88 | unsigned long ioport; | |
89 | ||
90 | const char *helper; | |
91 | const char *firmware; | |
92 | ||
93 | u8 buffer[65536]; | |
727c26ed PO |
94 | |
95 | spinlock_t lock; | |
96 | struct if_sdio_packet *packets; | |
97 | struct work_struct packet_worker; | |
98 | }; | |
99 | ||
100 | /********************************************************************/ | |
101 | /* I/O */ | |
102 | /********************************************************************/ | |
103 | ||
104 | static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err) | |
105 | { | |
106 | int ret, reg; | |
107 | u16 scratch; | |
108 | ||
109 | if (card->model == 0x04) | |
110 | reg = IF_SDIO_SCRATCH_OLD; | |
111 | else | |
112 | reg = IF_SDIO_SCRATCH; | |
113 | ||
114 | scratch = sdio_readb(card->func, reg, &ret); | |
115 | if (!ret) | |
116 | scratch |= sdio_readb(card->func, reg + 1, &ret) << 8; | |
117 | ||
118 | if (err) | |
119 | *err = ret; | |
120 | ||
121 | if (ret) | |
122 | return 0xffff; | |
123 | ||
124 | return scratch; | |
125 | } | |
126 | ||
127 | static int if_sdio_handle_cmd(struct if_sdio_card *card, | |
128 | u8 *buffer, unsigned size) | |
129 | { | |
7919b89c | 130 | struct lbs_private *priv = card->priv; |
727c26ed PO |
131 | int ret; |
132 | unsigned long flags; | |
7919b89c | 133 | u8 i; |
727c26ed PO |
134 | |
135 | lbs_deb_enter(LBS_DEB_SDIO); | |
136 | ||
ddac4526 | 137 | if (size > LBS_CMD_BUFFER_SIZE) { |
727c26ed PO |
138 | lbs_deb_sdio("response packet too large (%d bytes)\n", |
139 | (int)size); | |
140 | ret = -E2BIG; | |
141 | goto out; | |
142 | } | |
143 | ||
7919b89c | 144 | spin_lock_irqsave(&priv->driver_lock, flags); |
727c26ed | 145 | |
7919b89c HS |
146 | i = (priv->resp_idx == 0) ? 1 : 0; |
147 | BUG_ON(priv->resp_len[i]); | |
148 | priv->resp_len[i] = size; | |
149 | memcpy(priv->resp_buf[i], buffer, size); | |
150 | lbs_notify_command_response(priv, i); | |
727c26ed | 151 | |
7919b89c | 152 | spin_unlock_irqrestore(&card->priv->driver_lock, flags); |
727c26ed PO |
153 | |
154 | ret = 0; | |
155 | ||
156 | out: | |
727c26ed | 157 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); |
727c26ed PO |
158 | return ret; |
159 | } | |
160 | ||
161 | static int if_sdio_handle_data(struct if_sdio_card *card, | |
162 | u8 *buffer, unsigned size) | |
163 | { | |
164 | int ret; | |
165 | struct sk_buff *skb; | |
166 | char *data; | |
167 | ||
168 | lbs_deb_enter(LBS_DEB_SDIO); | |
169 | ||
170 | if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
171 | lbs_deb_sdio("response packet too large (%d bytes)\n", | |
172 | (int)size); | |
173 | ret = -E2BIG; | |
174 | goto out; | |
175 | } | |
176 | ||
51e6b712 | 177 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN); |
727c26ed PO |
178 | if (!skb) { |
179 | ret = -ENOMEM; | |
180 | goto out; | |
181 | } | |
182 | ||
51e6b712 PO |
183 | skb_reserve(skb, NET_IP_ALIGN); |
184 | ||
727c26ed PO |
185 | data = skb_put(skb, size); |
186 | ||
187 | memcpy(data, buffer, size); | |
188 | ||
10078321 | 189 | lbs_process_rxed_packet(card->priv, skb); |
727c26ed PO |
190 | |
191 | ret = 0; | |
192 | ||
193 | out: | |
194 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
195 | ||
196 | return ret; | |
197 | } | |
198 | ||
199 | static int if_sdio_handle_event(struct if_sdio_card *card, | |
200 | u8 *buffer, unsigned size) | |
201 | { | |
202 | int ret; | |
727c26ed PO |
203 | u32 event; |
204 | ||
205 | lbs_deb_enter(LBS_DEB_SDIO); | |
206 | ||
207 | if (card->model == 0x04) { | |
208 | event = sdio_readb(card->func, IF_SDIO_EVENT, &ret); | |
209 | if (ret) | |
210 | goto out; | |
211 | } else { | |
212 | if (size < 4) { | |
213 | lbs_deb_sdio("event packet too small (%d bytes)\n", | |
214 | (int)size); | |
215 | ret = -EINVAL; | |
216 | goto out; | |
217 | } | |
218 | event = buffer[3] << 24; | |
219 | event |= buffer[2] << 16; | |
220 | event |= buffer[1] << 8; | |
221 | event |= buffer[0] << 0; | |
727c26ed PO |
222 | } |
223 | ||
7919b89c | 224 | lbs_queue_event(card->priv, event & 0xFF); |
727c26ed PO |
225 | ret = 0; |
226 | ||
227 | out: | |
228 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
229 | ||
230 | return ret; | |
231 | } | |
232 | ||
233 | static int if_sdio_card_to_host(struct if_sdio_card *card) | |
234 | { | |
235 | int ret; | |
236 | u8 status; | |
237 | u16 size, type, chunk; | |
238 | unsigned long timeout; | |
239 | ||
240 | lbs_deb_enter(LBS_DEB_SDIO); | |
241 | ||
242 | size = if_sdio_read_scratch(card, &ret); | |
243 | if (ret) | |
244 | goto out; | |
245 | ||
246 | if (size < 4) { | |
247 | lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n", | |
248 | (int)size); | |
249 | ret = -EINVAL; | |
250 | goto out; | |
251 | } | |
252 | ||
253 | timeout = jiffies + HZ; | |
254 | while (1) { | |
255 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
256 | if (ret) | |
257 | goto out; | |
258 | if (status & IF_SDIO_IO_RDY) | |
259 | break; | |
260 | if (time_after(jiffies, timeout)) { | |
261 | ret = -ETIMEDOUT; | |
262 | goto out; | |
263 | } | |
264 | mdelay(1); | |
265 | } | |
266 | ||
267 | /* | |
268 | * The transfer must be in one transaction or the firmware | |
269 | * goes suicidal. | |
270 | */ | |
271 | chunk = size; | |
272 | if ((chunk > card->func->cur_blksize) || (chunk > 512)) { | |
273 | chunk = (chunk + card->func->cur_blksize - 1) / | |
274 | card->func->cur_blksize * card->func->cur_blksize; | |
275 | } | |
276 | ||
277 | ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk); | |
278 | if (ret) | |
279 | goto out; | |
280 | ||
281 | chunk = card->buffer[0] | (card->buffer[1] << 8); | |
282 | type = card->buffer[2] | (card->buffer[3] << 8); | |
283 | ||
284 | lbs_deb_sdio("packet of type %d and size %d bytes\n", | |
285 | (int)type, (int)chunk); | |
286 | ||
287 | if (chunk > size) { | |
288 | lbs_deb_sdio("packet fragment (%d > %d)\n", | |
289 | (int)chunk, (int)size); | |
290 | ret = -EINVAL; | |
291 | goto out; | |
292 | } | |
293 | ||
294 | if (chunk < size) { | |
295 | lbs_deb_sdio("packet fragment (%d < %d)\n", | |
296 | (int)chunk, (int)size); | |
297 | } | |
298 | ||
299 | switch (type) { | |
300 | case MVMS_CMD: | |
301 | ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4); | |
302 | if (ret) | |
303 | goto out; | |
304 | break; | |
305 | case MVMS_DAT: | |
306 | ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4); | |
307 | if (ret) | |
308 | goto out; | |
309 | break; | |
310 | case MVMS_EVENT: | |
311 | ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4); | |
312 | if (ret) | |
313 | goto out; | |
314 | break; | |
315 | default: | |
316 | lbs_deb_sdio("invalid type (%d) from firmware\n", | |
317 | (int)type); | |
318 | ret = -EINVAL; | |
319 | goto out; | |
320 | } | |
321 | ||
322 | out: | |
323 | if (ret) | |
324 | lbs_pr_err("problem fetching packet from firmware\n"); | |
325 | ||
326 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
331 | static void if_sdio_host_to_card_worker(struct work_struct *work) | |
332 | { | |
333 | struct if_sdio_card *card; | |
334 | struct if_sdio_packet *packet; | |
335 | unsigned long timeout; | |
336 | u8 status; | |
337 | int ret; | |
338 | unsigned long flags; | |
339 | ||
340 | lbs_deb_enter(LBS_DEB_SDIO); | |
341 | ||
342 | card = container_of(work, struct if_sdio_card, packet_worker); | |
343 | ||
344 | while (1) { | |
345 | spin_lock_irqsave(&card->lock, flags); | |
346 | packet = card->packets; | |
347 | if (packet) | |
348 | card->packets = packet->next; | |
349 | spin_unlock_irqrestore(&card->lock, flags); | |
350 | ||
351 | if (!packet) | |
352 | break; | |
353 | ||
354 | sdio_claim_host(card->func); | |
355 | ||
356 | timeout = jiffies + HZ; | |
357 | while (1) { | |
358 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
359 | if (ret) | |
360 | goto release; | |
361 | if (status & IF_SDIO_IO_RDY) | |
362 | break; | |
363 | if (time_after(jiffies, timeout)) { | |
364 | ret = -ETIMEDOUT; | |
365 | goto release; | |
366 | } | |
367 | mdelay(1); | |
368 | } | |
369 | ||
370 | ret = sdio_writesb(card->func, card->ioport, | |
371 | packet->buffer, packet->nb); | |
372 | if (ret) | |
373 | goto release; | |
374 | release: | |
375 | sdio_release_host(card->func); | |
376 | ||
377 | kfree(packet); | |
378 | } | |
379 | ||
380 | lbs_deb_leave(LBS_DEB_SDIO); | |
381 | } | |
382 | ||
383 | /********************************************************************/ | |
384 | /* Firmware */ | |
385 | /********************************************************************/ | |
386 | ||
387 | static int if_sdio_prog_helper(struct if_sdio_card *card) | |
388 | { | |
389 | int ret; | |
390 | u8 status; | |
391 | const struct firmware *fw; | |
392 | unsigned long timeout; | |
393 | u8 *chunk_buffer; | |
394 | u32 chunk_size; | |
6dfff895 | 395 | const u8 *firmware; |
727c26ed PO |
396 | size_t size; |
397 | ||
398 | lbs_deb_enter(LBS_DEB_SDIO); | |
399 | ||
400 | ret = request_firmware(&fw, card->helper, &card->func->dev); | |
401 | if (ret) { | |
402 | lbs_pr_err("can't load helper firmware\n"); | |
403 | goto out; | |
404 | } | |
405 | ||
406 | chunk_buffer = kzalloc(64, GFP_KERNEL); | |
407 | if (!chunk_buffer) { | |
408 | ret = -ENOMEM; | |
409 | goto release_fw; | |
410 | } | |
411 | ||
412 | sdio_claim_host(card->func); | |
413 | ||
414 | ret = sdio_set_block_size(card->func, 32); | |
415 | if (ret) | |
416 | goto release; | |
417 | ||
418 | firmware = fw->data; | |
419 | size = fw->size; | |
420 | ||
421 | while (size) { | |
422 | timeout = jiffies + HZ; | |
423 | while (1) { | |
424 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
425 | if (ret) | |
426 | goto release; | |
427 | if ((status & IF_SDIO_IO_RDY) && | |
428 | (status & IF_SDIO_DL_RDY)) | |
429 | break; | |
430 | if (time_after(jiffies, timeout)) { | |
431 | ret = -ETIMEDOUT; | |
432 | goto release; | |
433 | } | |
434 | mdelay(1); | |
435 | } | |
436 | ||
437 | chunk_size = min(size, (size_t)60); | |
438 | ||
c2df2efe | 439 | *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size); |
727c26ed PO |
440 | memcpy(chunk_buffer + 4, firmware, chunk_size); |
441 | /* | |
442 | lbs_deb_sdio("sending %d bytes chunk\n", chunk_size); | |
443 | */ | |
444 | ret = sdio_writesb(card->func, card->ioport, | |
445 | chunk_buffer, 64); | |
446 | if (ret) | |
447 | goto release; | |
448 | ||
449 | firmware += chunk_size; | |
450 | size -= chunk_size; | |
451 | } | |
452 | ||
453 | /* an empty block marks the end of the transfer */ | |
454 | memset(chunk_buffer, 0, 4); | |
455 | ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64); | |
456 | if (ret) | |
457 | goto release; | |
458 | ||
459 | lbs_deb_sdio("waiting for helper to boot...\n"); | |
460 | ||
461 | /* wait for the helper to boot by looking at the size register */ | |
462 | timeout = jiffies + HZ; | |
463 | while (1) { | |
464 | u16 req_size; | |
465 | ||
466 | req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret); | |
467 | if (ret) | |
468 | goto release; | |
469 | ||
470 | req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8; | |
471 | if (ret) | |
472 | goto release; | |
473 | ||
474 | if (req_size != 0) | |
475 | break; | |
476 | ||
477 | if (time_after(jiffies, timeout)) { | |
478 | ret = -ETIMEDOUT; | |
479 | goto release; | |
480 | } | |
481 | ||
482 | msleep(10); | |
483 | } | |
484 | ||
485 | ret = 0; | |
486 | ||
487 | release: | |
488 | sdio_set_block_size(card->func, 0); | |
489 | sdio_release_host(card->func); | |
490 | kfree(chunk_buffer); | |
491 | release_fw: | |
492 | release_firmware(fw); | |
493 | ||
494 | out: | |
495 | if (ret) | |
496 | lbs_pr_err("failed to load helper firmware\n"); | |
497 | ||
498 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
499 | ||
500 | return ret; | |
501 | } | |
502 | ||
503 | static int if_sdio_prog_real(struct if_sdio_card *card) | |
504 | { | |
505 | int ret; | |
506 | u8 status; | |
507 | const struct firmware *fw; | |
508 | unsigned long timeout; | |
509 | u8 *chunk_buffer; | |
510 | u32 chunk_size; | |
6dfff895 | 511 | const u8 *firmware; |
727c26ed PO |
512 | size_t size, req_size; |
513 | ||
514 | lbs_deb_enter(LBS_DEB_SDIO); | |
515 | ||
516 | ret = request_firmware(&fw, card->firmware, &card->func->dev); | |
517 | if (ret) { | |
518 | lbs_pr_err("can't load firmware\n"); | |
519 | goto out; | |
520 | } | |
521 | ||
522 | chunk_buffer = kzalloc(512, GFP_KERNEL); | |
523 | if (!chunk_buffer) { | |
524 | ret = -ENOMEM; | |
525 | goto release_fw; | |
526 | } | |
527 | ||
528 | sdio_claim_host(card->func); | |
529 | ||
530 | ret = sdio_set_block_size(card->func, 32); | |
531 | if (ret) | |
532 | goto release; | |
533 | ||
534 | firmware = fw->data; | |
535 | size = fw->size; | |
536 | ||
537 | while (size) { | |
538 | timeout = jiffies + HZ; | |
539 | while (1) { | |
540 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
541 | if (ret) | |
542 | goto release; | |
543 | if ((status & IF_SDIO_IO_RDY) && | |
544 | (status & IF_SDIO_DL_RDY)) | |
545 | break; | |
546 | if (time_after(jiffies, timeout)) { | |
547 | ret = -ETIMEDOUT; | |
548 | goto release; | |
549 | } | |
550 | mdelay(1); | |
551 | } | |
552 | ||
553 | req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret); | |
554 | if (ret) | |
555 | goto release; | |
556 | ||
557 | req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8; | |
558 | if (ret) | |
559 | goto release; | |
560 | /* | |
561 | lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size); | |
562 | */ | |
563 | if (req_size == 0) { | |
564 | lbs_deb_sdio("firmware helper gave up early\n"); | |
565 | ret = -EIO; | |
566 | goto release; | |
567 | } | |
568 | ||
569 | if (req_size & 0x01) { | |
570 | lbs_deb_sdio("firmware helper signalled error\n"); | |
571 | ret = -EIO; | |
572 | goto release; | |
573 | } | |
574 | ||
575 | if (req_size > size) | |
576 | req_size = size; | |
577 | ||
578 | while (req_size) { | |
579 | chunk_size = min(req_size, (size_t)512); | |
580 | ||
581 | memcpy(chunk_buffer, firmware, chunk_size); | |
582 | /* | |
583 | lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n", | |
584 | chunk_size, (chunk_size + 31) / 32 * 32); | |
585 | */ | |
586 | ret = sdio_writesb(card->func, card->ioport, | |
587 | chunk_buffer, (chunk_size + 31) / 32 * 32); | |
588 | if (ret) | |
589 | goto release; | |
590 | ||
591 | firmware += chunk_size; | |
592 | size -= chunk_size; | |
593 | req_size -= chunk_size; | |
594 | } | |
595 | } | |
596 | ||
597 | ret = 0; | |
598 | ||
599 | lbs_deb_sdio("waiting for firmware to boot...\n"); | |
600 | ||
601 | /* wait for the firmware to boot */ | |
602 | timeout = jiffies + HZ; | |
603 | while (1) { | |
604 | u16 scratch; | |
605 | ||
606 | scratch = if_sdio_read_scratch(card, &ret); | |
607 | if (ret) | |
608 | goto release; | |
609 | ||
610 | if (scratch == IF_SDIO_FIRMWARE_OK) | |
611 | break; | |
612 | ||
613 | if (time_after(jiffies, timeout)) { | |
614 | ret = -ETIMEDOUT; | |
615 | goto release; | |
616 | } | |
617 | ||
618 | msleep(10); | |
619 | } | |
620 | ||
621 | ret = 0; | |
622 | ||
623 | release: | |
624 | sdio_set_block_size(card->func, 0); | |
625 | sdio_release_host(card->func); | |
626 | kfree(chunk_buffer); | |
627 | release_fw: | |
628 | release_firmware(fw); | |
629 | ||
630 | out: | |
631 | if (ret) | |
632 | lbs_pr_err("failed to load firmware\n"); | |
633 | ||
634 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
635 | ||
636 | return ret; | |
637 | } | |
638 | ||
639 | static int if_sdio_prog_firmware(struct if_sdio_card *card) | |
640 | { | |
641 | int ret; | |
642 | u16 scratch; | |
643 | ||
644 | lbs_deb_enter(LBS_DEB_SDIO); | |
645 | ||
646 | sdio_claim_host(card->func); | |
647 | scratch = if_sdio_read_scratch(card, &ret); | |
648 | sdio_release_host(card->func); | |
649 | ||
650 | if (ret) | |
651 | goto out; | |
652 | ||
653 | if (scratch == IF_SDIO_FIRMWARE_OK) { | |
654 | lbs_deb_sdio("firmware already loaded\n"); | |
655 | goto success; | |
656 | } | |
657 | ||
658 | ret = if_sdio_prog_helper(card); | |
659 | if (ret) | |
660 | goto out; | |
661 | ||
662 | ret = if_sdio_prog_real(card); | |
663 | if (ret) | |
664 | goto out; | |
665 | ||
666 | success: | |
667 | ret = 0; | |
668 | ||
669 | out: | |
670 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
671 | ||
672 | return ret; | |
673 | } | |
674 | ||
675 | /*******************************************************************/ | |
676 | /* Libertas callbacks */ | |
677 | /*******************************************************************/ | |
678 | ||
69f9032d HS |
679 | static int if_sdio_host_to_card(struct lbs_private *priv, |
680 | u8 type, u8 *buf, u16 nb) | |
727c26ed PO |
681 | { |
682 | int ret; | |
683 | struct if_sdio_card *card; | |
684 | struct if_sdio_packet *packet, *cur; | |
685 | u16 size; | |
686 | unsigned long flags; | |
687 | ||
688 | lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb); | |
689 | ||
690 | card = priv->card; | |
691 | ||
692 | if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) { | |
693 | ret = -EINVAL; | |
694 | goto out; | |
695 | } | |
696 | ||
697 | /* | |
698 | * The transfer must be in one transaction or the firmware | |
699 | * goes suicidal. | |
700 | */ | |
701 | size = nb + 4; | |
702 | if ((size > card->func->cur_blksize) || (size > 512)) { | |
703 | size = (size + card->func->cur_blksize - 1) / | |
704 | card->func->cur_blksize * card->func->cur_blksize; | |
705 | } | |
706 | ||
707 | packet = kzalloc(sizeof(struct if_sdio_packet) + size, | |
708 | GFP_ATOMIC); | |
709 | if (!packet) { | |
710 | ret = -ENOMEM; | |
711 | goto out; | |
712 | } | |
713 | ||
714 | packet->next = NULL; | |
715 | packet->nb = size; | |
716 | ||
717 | /* | |
718 | * SDIO specific header. | |
719 | */ | |
720 | packet->buffer[0] = (nb + 4) & 0xff; | |
721 | packet->buffer[1] = ((nb + 4) >> 8) & 0xff; | |
722 | packet->buffer[2] = type; | |
723 | packet->buffer[3] = 0; | |
724 | ||
725 | memcpy(packet->buffer + 4, buf, nb); | |
726 | ||
727 | spin_lock_irqsave(&card->lock, flags); | |
728 | ||
729 | if (!card->packets) | |
730 | card->packets = packet; | |
731 | else { | |
732 | cur = card->packets; | |
733 | while (cur->next) | |
734 | cur = cur->next; | |
735 | cur->next = packet; | |
736 | } | |
737 | ||
738 | switch (type) { | |
739 | case MVMS_CMD: | |
740 | priv->dnld_sent = DNLD_CMD_SENT; | |
741 | break; | |
742 | case MVMS_DAT: | |
743 | priv->dnld_sent = DNLD_DATA_SENT; | |
744 | break; | |
745 | default: | |
746 | lbs_deb_sdio("unknown packet type %d\n", (int)type); | |
747 | } | |
748 | ||
749 | spin_unlock_irqrestore(&card->lock, flags); | |
750 | ||
751 | schedule_work(&card->packet_worker); | |
752 | ||
753 | ret = 0; | |
754 | ||
755 | out: | |
756 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
757 | ||
758 | return ret; | |
759 | } | |
760 | ||
727c26ed PO |
761 | /*******************************************************************/ |
762 | /* SDIO callbacks */ | |
763 | /*******************************************************************/ | |
764 | ||
765 | static void if_sdio_interrupt(struct sdio_func *func) | |
766 | { | |
767 | int ret; | |
768 | struct if_sdio_card *card; | |
769 | u8 cause; | |
770 | ||
771 | lbs_deb_enter(LBS_DEB_SDIO); | |
772 | ||
773 | card = sdio_get_drvdata(func); | |
774 | ||
775 | cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret); | |
776 | if (ret) | |
777 | goto out; | |
778 | ||
779 | lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause); | |
780 | ||
781 | sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret); | |
782 | if (ret) | |
783 | goto out; | |
784 | ||
785 | /* | |
786 | * Ignore the define name, this really means the card has | |
787 | * successfully received the command. | |
788 | */ | |
e775ed7c DW |
789 | if (cause & IF_SDIO_H_INT_DNLD) |
790 | lbs_host_to_card_done(card->priv); | |
791 | ||
727c26ed PO |
792 | |
793 | if (cause & IF_SDIO_H_INT_UPLD) { | |
794 | ret = if_sdio_card_to_host(card); | |
795 | if (ret) | |
796 | goto out; | |
797 | } | |
798 | ||
799 | ret = 0; | |
800 | ||
801 | out: | |
802 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
803 | } | |
804 | ||
805 | static int if_sdio_probe(struct sdio_func *func, | |
806 | const struct sdio_device_id *id) | |
807 | { | |
808 | struct if_sdio_card *card; | |
69f9032d | 809 | struct lbs_private *priv; |
727c26ed PO |
810 | int ret, i; |
811 | unsigned int model; | |
812 | struct if_sdio_packet *packet; | |
813 | ||
814 | lbs_deb_enter(LBS_DEB_SDIO); | |
815 | ||
816 | for (i = 0;i < func->card->num_info;i++) { | |
817 | if (sscanf(func->card->info[i], | |
818 | "802.11 SDIO ID: %x", &model) == 1) | |
819 | break; | |
820 | if (sscanf(func->card->info[i], | |
821 | "ID: %x", &model) == 1) | |
822 | break; | |
436c8854 MP |
823 | if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) { |
824 | model = 4; | |
825 | break; | |
826 | } | |
727c26ed PO |
827 | } |
828 | ||
829 | if (i == func->card->num_info) { | |
830 | lbs_pr_err("unable to identify card model\n"); | |
831 | return -ENODEV; | |
832 | } | |
833 | ||
834 | card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL); | |
835 | if (!card) | |
836 | return -ENOMEM; | |
837 | ||
838 | card->func = func; | |
839 | card->model = model; | |
840 | spin_lock_init(&card->lock); | |
841 | INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker); | |
842 | ||
843 | for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) { | |
844 | if (card->model == if_sdio_models[i].model) | |
845 | break; | |
846 | } | |
847 | ||
848 | if (i == ARRAY_SIZE(if_sdio_models)) { | |
849 | lbs_pr_err("unkown card model 0x%x\n", card->model); | |
850 | ret = -ENODEV; | |
851 | goto free; | |
852 | } | |
853 | ||
854 | card->helper = if_sdio_models[i].helper; | |
855 | card->firmware = if_sdio_models[i].firmware; | |
856 | ||
10078321 | 857 | if (lbs_helper_name) { |
727c26ed | 858 | lbs_deb_sdio("overriding helper firmware: %s\n", |
10078321 HS |
859 | lbs_helper_name); |
860 | card->helper = lbs_helper_name; | |
727c26ed PO |
861 | } |
862 | ||
10078321 HS |
863 | if (lbs_fw_name) { |
864 | lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name); | |
865 | card->firmware = lbs_fw_name; | |
727c26ed PO |
866 | } |
867 | ||
868 | sdio_claim_host(func); | |
869 | ||
870 | ret = sdio_enable_func(func); | |
871 | if (ret) | |
872 | goto release; | |
873 | ||
874 | ret = sdio_claim_irq(func, if_sdio_interrupt); | |
875 | if (ret) | |
876 | goto disable; | |
877 | ||
878 | card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret); | |
879 | if (ret) | |
880 | goto release_int; | |
881 | ||
882 | card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8; | |
883 | if (ret) | |
884 | goto release_int; | |
885 | ||
886 | card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16; | |
887 | if (ret) | |
888 | goto release_int; | |
889 | ||
890 | sdio_release_host(func); | |
891 | ||
892 | sdio_set_drvdata(func, card); | |
893 | ||
894 | lbs_deb_sdio("class = 0x%X, vendor = 0x%X, " | |
895 | "device = 0x%X, model = 0x%X, ioport = 0x%X\n", | |
896 | func->class, func->vendor, func->device, | |
897 | model, (unsigned)card->ioport); | |
898 | ||
899 | ret = if_sdio_prog_firmware(card); | |
900 | if (ret) | |
901 | goto reclaim; | |
902 | ||
10078321 | 903 | priv = lbs_add_card(card, &func->dev); |
727c26ed PO |
904 | if (!priv) { |
905 | ret = -ENOMEM; | |
906 | goto reclaim; | |
907 | } | |
908 | ||
909 | card->priv = priv; | |
910 | ||
911 | priv->card = card; | |
912 | priv->hw_host_to_card = if_sdio_host_to_card; | |
727c26ed | 913 | |
aa21c004 | 914 | priv->fw_ready = 1; |
727c26ed PO |
915 | |
916 | /* | |
917 | * Enable interrupts now that everything is set up | |
918 | */ | |
919 | sdio_claim_host(func); | |
920 | sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret); | |
921 | sdio_release_host(func); | |
922 | if (ret) | |
923 | goto reclaim; | |
924 | ||
10078321 | 925 | ret = lbs_start_card(priv); |
727c26ed PO |
926 | if (ret) |
927 | goto err_activate_card; | |
928 | ||
929 | out: | |
930 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
931 | ||
932 | return ret; | |
933 | ||
934 | err_activate_card: | |
935 | flush_scheduled_work(); | |
936 | free_netdev(priv->dev); | |
aa21c004 | 937 | kfree(priv); |
727c26ed PO |
938 | reclaim: |
939 | sdio_claim_host(func); | |
940 | release_int: | |
941 | sdio_release_irq(func); | |
942 | disable: | |
943 | sdio_disable_func(func); | |
944 | release: | |
945 | sdio_release_host(func); | |
946 | free: | |
947 | while (card->packets) { | |
948 | packet = card->packets; | |
949 | card->packets = card->packets->next; | |
950 | kfree(packet); | |
951 | } | |
952 | ||
953 | kfree(card); | |
954 | ||
955 | goto out; | |
956 | } | |
957 | ||
958 | static void if_sdio_remove(struct sdio_func *func) | |
959 | { | |
960 | struct if_sdio_card *card; | |
961 | struct if_sdio_packet *packet; | |
962 | ||
963 | lbs_deb_enter(LBS_DEB_SDIO); | |
964 | ||
965 | card = sdio_get_drvdata(func); | |
966 | ||
aa21c004 | 967 | card->priv->surpriseremoved = 1; |
727c26ed PO |
968 | |
969 | lbs_deb_sdio("call remove card\n"); | |
10078321 HS |
970 | lbs_stop_card(card->priv); |
971 | lbs_remove_card(card->priv); | |
727c26ed PO |
972 | |
973 | flush_scheduled_work(); | |
974 | ||
975 | sdio_claim_host(func); | |
976 | sdio_release_irq(func); | |
977 | sdio_disable_func(func); | |
978 | sdio_release_host(func); | |
979 | ||
980 | while (card->packets) { | |
981 | packet = card->packets; | |
982 | card->packets = card->packets->next; | |
983 | kfree(packet); | |
984 | } | |
985 | ||
986 | kfree(card); | |
987 | ||
988 | lbs_deb_leave(LBS_DEB_SDIO); | |
989 | } | |
990 | ||
991 | static struct sdio_driver if_sdio_driver = { | |
992 | .name = "libertas_sdio", | |
993 | .id_table = if_sdio_ids, | |
994 | .probe = if_sdio_probe, | |
995 | .remove = if_sdio_remove, | |
996 | }; | |
997 | ||
998 | /*******************************************************************/ | |
999 | /* Module functions */ | |
1000 | /*******************************************************************/ | |
1001 | ||
4fb910fd | 1002 | static int __init if_sdio_init_module(void) |
727c26ed PO |
1003 | { |
1004 | int ret = 0; | |
1005 | ||
1006 | lbs_deb_enter(LBS_DEB_SDIO); | |
1007 | ||
1008 | printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n"); | |
1009 | printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n"); | |
1010 | ||
1011 | ret = sdio_register_driver(&if_sdio_driver); | |
1012 | ||
1013 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
1014 | ||
1015 | return ret; | |
1016 | } | |
1017 | ||
4fb910fd | 1018 | static void __exit if_sdio_exit_module(void) |
727c26ed PO |
1019 | { |
1020 | lbs_deb_enter(LBS_DEB_SDIO); | |
1021 | ||
1022 | sdio_unregister_driver(&if_sdio_driver); | |
1023 | ||
1024 | lbs_deb_leave(LBS_DEB_SDIO); | |
1025 | } | |
1026 | ||
1027 | module_init(if_sdio_init_module); | |
1028 | module_exit(if_sdio_exit_module); | |
1029 | ||
1030 | MODULE_DESCRIPTION("Libertas SDIO WLAN Driver"); | |
1031 | MODULE_AUTHOR("Pierre Ossman"); | |
1032 | MODULE_LICENSE("GPL"); |