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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 | |
22 | * bugs in the host controllers related to that. One such bug is that | |
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]; | |
94 | u8 int_cause; | |
95 | u32 event; | |
96 | ||
97 | spinlock_t lock; | |
98 | struct if_sdio_packet *packets; | |
99 | struct work_struct packet_worker; | |
100 | }; | |
101 | ||
102 | /********************************************************************/ | |
103 | /* I/O */ | |
104 | /********************************************************************/ | |
105 | ||
106 | static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err) | |
107 | { | |
108 | int ret, reg; | |
109 | u16 scratch; | |
110 | ||
111 | if (card->model == 0x04) | |
112 | reg = IF_SDIO_SCRATCH_OLD; | |
113 | else | |
114 | reg = IF_SDIO_SCRATCH; | |
115 | ||
116 | scratch = sdio_readb(card->func, reg, &ret); | |
117 | if (!ret) | |
118 | scratch |= sdio_readb(card->func, reg + 1, &ret) << 8; | |
119 | ||
120 | if (err) | |
121 | *err = ret; | |
122 | ||
123 | if (ret) | |
124 | return 0xffff; | |
125 | ||
126 | return scratch; | |
127 | } | |
128 | ||
129 | static int if_sdio_handle_cmd(struct if_sdio_card *card, | |
130 | u8 *buffer, unsigned size) | |
131 | { | |
132 | int ret; | |
133 | unsigned long flags; | |
134 | ||
135 | lbs_deb_enter(LBS_DEB_SDIO); | |
136 | ||
aa21c004 | 137 | spin_lock_irqsave(&card->priv->driver_lock, flags); |
727c26ed | 138 | |
aa21c004 | 139 | if (!card->priv->cur_cmd) { |
727c26ed PO |
140 | lbs_deb_sdio("discarding spurious response\n"); |
141 | ret = 0; | |
142 | goto out; | |
143 | } | |
144 | ||
ddac4526 | 145 | if (size > LBS_CMD_BUFFER_SIZE) { |
727c26ed PO |
146 | lbs_deb_sdio("response packet too large (%d bytes)\n", |
147 | (int)size); | |
148 | ret = -E2BIG; | |
149 | goto out; | |
150 | } | |
151 | ||
ddac4526 | 152 | memcpy(card->priv->cur_cmd->cmdbuf, buffer, size); |
727c26ed PO |
153 | card->priv->upld_len = size; |
154 | ||
155 | card->int_cause |= MRVDRV_CMD_UPLD_RDY; | |
156 | ||
4f679496 | 157 | lbs_interrupt(card->priv); |
727c26ed PO |
158 | |
159 | ret = 0; | |
160 | ||
161 | out: | |
aa21c004 | 162 | spin_unlock_irqrestore(&card->priv->driver_lock, flags); |
727c26ed PO |
163 | |
164 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
165 | ||
166 | return ret; | |
167 | } | |
168 | ||
169 | static int if_sdio_handle_data(struct if_sdio_card *card, | |
170 | u8 *buffer, unsigned size) | |
171 | { | |
172 | int ret; | |
173 | struct sk_buff *skb; | |
174 | char *data; | |
175 | ||
176 | lbs_deb_enter(LBS_DEB_SDIO); | |
177 | ||
178 | if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
179 | lbs_deb_sdio("response packet too large (%d bytes)\n", | |
180 | (int)size); | |
181 | ret = -E2BIG; | |
182 | goto out; | |
183 | } | |
184 | ||
51e6b712 | 185 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN); |
727c26ed PO |
186 | if (!skb) { |
187 | ret = -ENOMEM; | |
188 | goto out; | |
189 | } | |
190 | ||
51e6b712 PO |
191 | skb_reserve(skb, NET_IP_ALIGN); |
192 | ||
727c26ed PO |
193 | data = skb_put(skb, size); |
194 | ||
195 | memcpy(data, buffer, size); | |
196 | ||
10078321 | 197 | lbs_process_rxed_packet(card->priv, skb); |
727c26ed PO |
198 | |
199 | ret = 0; | |
200 | ||
201 | out: | |
202 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
203 | ||
204 | return ret; | |
205 | } | |
206 | ||
207 | static int if_sdio_handle_event(struct if_sdio_card *card, | |
208 | u8 *buffer, unsigned size) | |
209 | { | |
210 | int ret; | |
211 | unsigned long flags; | |
212 | u32 event; | |
213 | ||
214 | lbs_deb_enter(LBS_DEB_SDIO); | |
215 | ||
216 | if (card->model == 0x04) { | |
217 | event = sdio_readb(card->func, IF_SDIO_EVENT, &ret); | |
218 | if (ret) | |
219 | goto out; | |
220 | } else { | |
221 | if (size < 4) { | |
222 | lbs_deb_sdio("event packet too small (%d bytes)\n", | |
223 | (int)size); | |
224 | ret = -EINVAL; | |
225 | goto out; | |
226 | } | |
227 | event = buffer[3] << 24; | |
228 | event |= buffer[2] << 16; | |
229 | event |= buffer[1] << 8; | |
230 | event |= buffer[0] << 0; | |
231 | event <<= SBI_EVENT_CAUSE_SHIFT; | |
232 | } | |
233 | ||
aa21c004 | 234 | spin_lock_irqsave(&card->priv->driver_lock, flags); |
727c26ed PO |
235 | |
236 | card->event = event; | |
237 | card->int_cause |= MRVDRV_CARDEVENT; | |
238 | ||
4f679496 | 239 | lbs_interrupt(card->priv); |
727c26ed | 240 | |
aa21c004 | 241 | spin_unlock_irqrestore(&card->priv->driver_lock, flags); |
727c26ed PO |
242 | |
243 | ret = 0; | |
244 | ||
245 | out: | |
246 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
251 | static int if_sdio_card_to_host(struct if_sdio_card *card) | |
252 | { | |
253 | int ret; | |
254 | u8 status; | |
255 | u16 size, type, chunk; | |
256 | unsigned long timeout; | |
257 | ||
258 | lbs_deb_enter(LBS_DEB_SDIO); | |
259 | ||
260 | size = if_sdio_read_scratch(card, &ret); | |
261 | if (ret) | |
262 | goto out; | |
263 | ||
264 | if (size < 4) { | |
265 | lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n", | |
266 | (int)size); | |
267 | ret = -EINVAL; | |
268 | goto out; | |
269 | } | |
270 | ||
271 | timeout = jiffies + HZ; | |
272 | while (1) { | |
273 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
274 | if (ret) | |
275 | goto out; | |
276 | if (status & IF_SDIO_IO_RDY) | |
277 | break; | |
278 | if (time_after(jiffies, timeout)) { | |
279 | ret = -ETIMEDOUT; | |
280 | goto out; | |
281 | } | |
282 | mdelay(1); | |
283 | } | |
284 | ||
285 | /* | |
286 | * The transfer must be in one transaction or the firmware | |
287 | * goes suicidal. | |
288 | */ | |
289 | chunk = size; | |
290 | if ((chunk > card->func->cur_blksize) || (chunk > 512)) { | |
291 | chunk = (chunk + card->func->cur_blksize - 1) / | |
292 | card->func->cur_blksize * card->func->cur_blksize; | |
293 | } | |
294 | ||
295 | ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk); | |
296 | if (ret) | |
297 | goto out; | |
298 | ||
299 | chunk = card->buffer[0] | (card->buffer[1] << 8); | |
300 | type = card->buffer[2] | (card->buffer[3] << 8); | |
301 | ||
302 | lbs_deb_sdio("packet of type %d and size %d bytes\n", | |
303 | (int)type, (int)chunk); | |
304 | ||
305 | if (chunk > size) { | |
306 | lbs_deb_sdio("packet fragment (%d > %d)\n", | |
307 | (int)chunk, (int)size); | |
308 | ret = -EINVAL; | |
309 | goto out; | |
310 | } | |
311 | ||
312 | if (chunk < size) { | |
313 | lbs_deb_sdio("packet fragment (%d < %d)\n", | |
314 | (int)chunk, (int)size); | |
315 | } | |
316 | ||
317 | switch (type) { | |
318 | case MVMS_CMD: | |
319 | ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4); | |
320 | if (ret) | |
321 | goto out; | |
322 | break; | |
323 | case MVMS_DAT: | |
324 | ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4); | |
325 | if (ret) | |
326 | goto out; | |
327 | break; | |
328 | case MVMS_EVENT: | |
329 | ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4); | |
330 | if (ret) | |
331 | goto out; | |
332 | break; | |
333 | default: | |
334 | lbs_deb_sdio("invalid type (%d) from firmware\n", | |
335 | (int)type); | |
336 | ret = -EINVAL; | |
337 | goto out; | |
338 | } | |
339 | ||
340 | out: | |
341 | if (ret) | |
342 | lbs_pr_err("problem fetching packet from firmware\n"); | |
343 | ||
344 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
345 | ||
346 | return ret; | |
347 | } | |
348 | ||
349 | static void if_sdio_host_to_card_worker(struct work_struct *work) | |
350 | { | |
351 | struct if_sdio_card *card; | |
352 | struct if_sdio_packet *packet; | |
353 | unsigned long timeout; | |
354 | u8 status; | |
355 | int ret; | |
356 | unsigned long flags; | |
357 | ||
358 | lbs_deb_enter(LBS_DEB_SDIO); | |
359 | ||
360 | card = container_of(work, struct if_sdio_card, packet_worker); | |
361 | ||
362 | while (1) { | |
363 | spin_lock_irqsave(&card->lock, flags); | |
364 | packet = card->packets; | |
365 | if (packet) | |
366 | card->packets = packet->next; | |
367 | spin_unlock_irqrestore(&card->lock, flags); | |
368 | ||
369 | if (!packet) | |
370 | break; | |
371 | ||
372 | sdio_claim_host(card->func); | |
373 | ||
374 | timeout = jiffies + HZ; | |
375 | while (1) { | |
376 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
377 | if (ret) | |
378 | goto release; | |
379 | if (status & IF_SDIO_IO_RDY) | |
380 | break; | |
381 | if (time_after(jiffies, timeout)) { | |
382 | ret = -ETIMEDOUT; | |
383 | goto release; | |
384 | } | |
385 | mdelay(1); | |
386 | } | |
387 | ||
388 | ret = sdio_writesb(card->func, card->ioport, | |
389 | packet->buffer, packet->nb); | |
390 | if (ret) | |
391 | goto release; | |
392 | release: | |
393 | sdio_release_host(card->func); | |
394 | ||
395 | kfree(packet); | |
396 | } | |
397 | ||
398 | lbs_deb_leave(LBS_DEB_SDIO); | |
399 | } | |
400 | ||
401 | /********************************************************************/ | |
402 | /* Firmware */ | |
403 | /********************************************************************/ | |
404 | ||
405 | static int if_sdio_prog_helper(struct if_sdio_card *card) | |
406 | { | |
407 | int ret; | |
408 | u8 status; | |
409 | const struct firmware *fw; | |
410 | unsigned long timeout; | |
411 | u8 *chunk_buffer; | |
412 | u32 chunk_size; | |
413 | u8 *firmware; | |
414 | size_t size; | |
415 | ||
416 | lbs_deb_enter(LBS_DEB_SDIO); | |
417 | ||
418 | ret = request_firmware(&fw, card->helper, &card->func->dev); | |
419 | if (ret) { | |
420 | lbs_pr_err("can't load helper firmware\n"); | |
421 | goto out; | |
422 | } | |
423 | ||
424 | chunk_buffer = kzalloc(64, GFP_KERNEL); | |
425 | if (!chunk_buffer) { | |
426 | ret = -ENOMEM; | |
427 | goto release_fw; | |
428 | } | |
429 | ||
430 | sdio_claim_host(card->func); | |
431 | ||
432 | ret = sdio_set_block_size(card->func, 32); | |
433 | if (ret) | |
434 | goto release; | |
435 | ||
436 | firmware = fw->data; | |
437 | size = fw->size; | |
438 | ||
439 | while (size) { | |
440 | timeout = jiffies + HZ; | |
441 | while (1) { | |
442 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
443 | if (ret) | |
444 | goto release; | |
445 | if ((status & IF_SDIO_IO_RDY) && | |
446 | (status & IF_SDIO_DL_RDY)) | |
447 | break; | |
448 | if (time_after(jiffies, timeout)) { | |
449 | ret = -ETIMEDOUT; | |
450 | goto release; | |
451 | } | |
452 | mdelay(1); | |
453 | } | |
454 | ||
455 | chunk_size = min(size, (size_t)60); | |
456 | ||
c2df2efe | 457 | *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size); |
727c26ed PO |
458 | memcpy(chunk_buffer + 4, firmware, chunk_size); |
459 | /* | |
460 | lbs_deb_sdio("sending %d bytes chunk\n", chunk_size); | |
461 | */ | |
462 | ret = sdio_writesb(card->func, card->ioport, | |
463 | chunk_buffer, 64); | |
464 | if (ret) | |
465 | goto release; | |
466 | ||
467 | firmware += chunk_size; | |
468 | size -= chunk_size; | |
469 | } | |
470 | ||
471 | /* an empty block marks the end of the transfer */ | |
472 | memset(chunk_buffer, 0, 4); | |
473 | ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64); | |
474 | if (ret) | |
475 | goto release; | |
476 | ||
477 | lbs_deb_sdio("waiting for helper to boot...\n"); | |
478 | ||
479 | /* wait for the helper to boot by looking at the size register */ | |
480 | timeout = jiffies + HZ; | |
481 | while (1) { | |
482 | u16 req_size; | |
483 | ||
484 | req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret); | |
485 | if (ret) | |
486 | goto release; | |
487 | ||
488 | req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8; | |
489 | if (ret) | |
490 | goto release; | |
491 | ||
492 | if (req_size != 0) | |
493 | break; | |
494 | ||
495 | if (time_after(jiffies, timeout)) { | |
496 | ret = -ETIMEDOUT; | |
497 | goto release; | |
498 | } | |
499 | ||
500 | msleep(10); | |
501 | } | |
502 | ||
503 | ret = 0; | |
504 | ||
505 | release: | |
506 | sdio_set_block_size(card->func, 0); | |
507 | sdio_release_host(card->func); | |
508 | kfree(chunk_buffer); | |
509 | release_fw: | |
510 | release_firmware(fw); | |
511 | ||
512 | out: | |
513 | if (ret) | |
514 | lbs_pr_err("failed to load helper firmware\n"); | |
515 | ||
516 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
517 | ||
518 | return ret; | |
519 | } | |
520 | ||
521 | static int if_sdio_prog_real(struct if_sdio_card *card) | |
522 | { | |
523 | int ret; | |
524 | u8 status; | |
525 | const struct firmware *fw; | |
526 | unsigned long timeout; | |
527 | u8 *chunk_buffer; | |
528 | u32 chunk_size; | |
529 | u8 *firmware; | |
530 | size_t size, req_size; | |
531 | ||
532 | lbs_deb_enter(LBS_DEB_SDIO); | |
533 | ||
534 | ret = request_firmware(&fw, card->firmware, &card->func->dev); | |
535 | if (ret) { | |
536 | lbs_pr_err("can't load firmware\n"); | |
537 | goto out; | |
538 | } | |
539 | ||
540 | chunk_buffer = kzalloc(512, GFP_KERNEL); | |
541 | if (!chunk_buffer) { | |
542 | ret = -ENOMEM; | |
543 | goto release_fw; | |
544 | } | |
545 | ||
546 | sdio_claim_host(card->func); | |
547 | ||
548 | ret = sdio_set_block_size(card->func, 32); | |
549 | if (ret) | |
550 | goto release; | |
551 | ||
552 | firmware = fw->data; | |
553 | size = fw->size; | |
554 | ||
555 | while (size) { | |
556 | timeout = jiffies + HZ; | |
557 | while (1) { | |
558 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
559 | if (ret) | |
560 | goto release; | |
561 | if ((status & IF_SDIO_IO_RDY) && | |
562 | (status & IF_SDIO_DL_RDY)) | |
563 | break; | |
564 | if (time_after(jiffies, timeout)) { | |
565 | ret = -ETIMEDOUT; | |
566 | goto release; | |
567 | } | |
568 | mdelay(1); | |
569 | } | |
570 | ||
571 | req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret); | |
572 | if (ret) | |
573 | goto release; | |
574 | ||
575 | req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8; | |
576 | if (ret) | |
577 | goto release; | |
578 | /* | |
579 | lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size); | |
580 | */ | |
581 | if (req_size == 0) { | |
582 | lbs_deb_sdio("firmware helper gave up early\n"); | |
583 | ret = -EIO; | |
584 | goto release; | |
585 | } | |
586 | ||
587 | if (req_size & 0x01) { | |
588 | lbs_deb_sdio("firmware helper signalled error\n"); | |
589 | ret = -EIO; | |
590 | goto release; | |
591 | } | |
592 | ||
593 | if (req_size > size) | |
594 | req_size = size; | |
595 | ||
596 | while (req_size) { | |
597 | chunk_size = min(req_size, (size_t)512); | |
598 | ||
599 | memcpy(chunk_buffer, firmware, chunk_size); | |
600 | /* | |
601 | lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n", | |
602 | chunk_size, (chunk_size + 31) / 32 * 32); | |
603 | */ | |
604 | ret = sdio_writesb(card->func, card->ioport, | |
605 | chunk_buffer, (chunk_size + 31) / 32 * 32); | |
606 | if (ret) | |
607 | goto release; | |
608 | ||
609 | firmware += chunk_size; | |
610 | size -= chunk_size; | |
611 | req_size -= chunk_size; | |
612 | } | |
613 | } | |
614 | ||
615 | ret = 0; | |
616 | ||
617 | lbs_deb_sdio("waiting for firmware to boot...\n"); | |
618 | ||
619 | /* wait for the firmware to boot */ | |
620 | timeout = jiffies + HZ; | |
621 | while (1) { | |
622 | u16 scratch; | |
623 | ||
624 | scratch = if_sdio_read_scratch(card, &ret); | |
625 | if (ret) | |
626 | goto release; | |
627 | ||
628 | if (scratch == IF_SDIO_FIRMWARE_OK) | |
629 | break; | |
630 | ||
631 | if (time_after(jiffies, timeout)) { | |
632 | ret = -ETIMEDOUT; | |
633 | goto release; | |
634 | } | |
635 | ||
636 | msleep(10); | |
637 | } | |
638 | ||
639 | ret = 0; | |
640 | ||
641 | release: | |
642 | sdio_set_block_size(card->func, 0); | |
643 | sdio_release_host(card->func); | |
644 | kfree(chunk_buffer); | |
645 | release_fw: | |
646 | release_firmware(fw); | |
647 | ||
648 | out: | |
649 | if (ret) | |
650 | lbs_pr_err("failed to load firmware\n"); | |
651 | ||
652 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
653 | ||
654 | return ret; | |
655 | } | |
656 | ||
657 | static int if_sdio_prog_firmware(struct if_sdio_card *card) | |
658 | { | |
659 | int ret; | |
660 | u16 scratch; | |
661 | ||
662 | lbs_deb_enter(LBS_DEB_SDIO); | |
663 | ||
664 | sdio_claim_host(card->func); | |
665 | scratch = if_sdio_read_scratch(card, &ret); | |
666 | sdio_release_host(card->func); | |
667 | ||
668 | if (ret) | |
669 | goto out; | |
670 | ||
671 | if (scratch == IF_SDIO_FIRMWARE_OK) { | |
672 | lbs_deb_sdio("firmware already loaded\n"); | |
673 | goto success; | |
674 | } | |
675 | ||
676 | ret = if_sdio_prog_helper(card); | |
677 | if (ret) | |
678 | goto out; | |
679 | ||
680 | ret = if_sdio_prog_real(card); | |
681 | if (ret) | |
682 | goto out; | |
683 | ||
684 | success: | |
685 | ret = 0; | |
686 | ||
687 | out: | |
688 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
689 | ||
690 | return ret; | |
691 | } | |
692 | ||
693 | /*******************************************************************/ | |
694 | /* Libertas callbacks */ | |
695 | /*******************************************************************/ | |
696 | ||
69f9032d HS |
697 | static int if_sdio_host_to_card(struct lbs_private *priv, |
698 | u8 type, u8 *buf, u16 nb) | |
727c26ed PO |
699 | { |
700 | int ret; | |
701 | struct if_sdio_card *card; | |
702 | struct if_sdio_packet *packet, *cur; | |
703 | u16 size; | |
704 | unsigned long flags; | |
705 | ||
706 | lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb); | |
707 | ||
708 | card = priv->card; | |
709 | ||
710 | if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) { | |
711 | ret = -EINVAL; | |
712 | goto out; | |
713 | } | |
714 | ||
715 | /* | |
716 | * The transfer must be in one transaction or the firmware | |
717 | * goes suicidal. | |
718 | */ | |
719 | size = nb + 4; | |
720 | if ((size > card->func->cur_blksize) || (size > 512)) { | |
721 | size = (size + card->func->cur_blksize - 1) / | |
722 | card->func->cur_blksize * card->func->cur_blksize; | |
723 | } | |
724 | ||
725 | packet = kzalloc(sizeof(struct if_sdio_packet) + size, | |
726 | GFP_ATOMIC); | |
727 | if (!packet) { | |
728 | ret = -ENOMEM; | |
729 | goto out; | |
730 | } | |
731 | ||
732 | packet->next = NULL; | |
733 | packet->nb = size; | |
734 | ||
735 | /* | |
736 | * SDIO specific header. | |
737 | */ | |
738 | packet->buffer[0] = (nb + 4) & 0xff; | |
739 | packet->buffer[1] = ((nb + 4) >> 8) & 0xff; | |
740 | packet->buffer[2] = type; | |
741 | packet->buffer[3] = 0; | |
742 | ||
743 | memcpy(packet->buffer + 4, buf, nb); | |
744 | ||
745 | spin_lock_irqsave(&card->lock, flags); | |
746 | ||
747 | if (!card->packets) | |
748 | card->packets = packet; | |
749 | else { | |
750 | cur = card->packets; | |
751 | while (cur->next) | |
752 | cur = cur->next; | |
753 | cur->next = packet; | |
754 | } | |
755 | ||
756 | switch (type) { | |
757 | case MVMS_CMD: | |
758 | priv->dnld_sent = DNLD_CMD_SENT; | |
759 | break; | |
760 | case MVMS_DAT: | |
761 | priv->dnld_sent = DNLD_DATA_SENT; | |
762 | break; | |
763 | default: | |
764 | lbs_deb_sdio("unknown packet type %d\n", (int)type); | |
765 | } | |
766 | ||
767 | spin_unlock_irqrestore(&card->lock, flags); | |
768 | ||
769 | schedule_work(&card->packet_worker); | |
770 | ||
771 | ret = 0; | |
772 | ||
773 | out: | |
774 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
775 | ||
776 | return ret; | |
777 | } | |
778 | ||
69f9032d | 779 | static int if_sdio_get_int_status(struct lbs_private *priv, u8 *ireg) |
727c26ed PO |
780 | { |
781 | struct if_sdio_card *card; | |
782 | ||
783 | lbs_deb_enter(LBS_DEB_SDIO); | |
784 | ||
785 | card = priv->card; | |
786 | ||
787 | *ireg = card->int_cause; | |
788 | card->int_cause = 0; | |
789 | ||
790 | lbs_deb_leave(LBS_DEB_SDIO); | |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
69f9032d | 795 | static int if_sdio_read_event_cause(struct lbs_private *priv) |
727c26ed PO |
796 | { |
797 | struct if_sdio_card *card; | |
798 | ||
799 | lbs_deb_enter(LBS_DEB_SDIO); | |
800 | ||
801 | card = priv->card; | |
802 | ||
aa21c004 | 803 | priv->eventcause = card->event; |
727c26ed PO |
804 | |
805 | lbs_deb_leave(LBS_DEB_SDIO); | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
810 | /*******************************************************************/ | |
811 | /* SDIO callbacks */ | |
812 | /*******************************************************************/ | |
813 | ||
814 | static void if_sdio_interrupt(struct sdio_func *func) | |
815 | { | |
816 | int ret; | |
817 | struct if_sdio_card *card; | |
818 | u8 cause; | |
819 | ||
820 | lbs_deb_enter(LBS_DEB_SDIO); | |
821 | ||
822 | card = sdio_get_drvdata(func); | |
823 | ||
824 | cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret); | |
825 | if (ret) | |
826 | goto out; | |
827 | ||
828 | lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause); | |
829 | ||
830 | sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret); | |
831 | if (ret) | |
832 | goto out; | |
833 | ||
834 | /* | |
835 | * Ignore the define name, this really means the card has | |
836 | * successfully received the command. | |
837 | */ | |
e775ed7c DW |
838 | if (cause & IF_SDIO_H_INT_DNLD) |
839 | lbs_host_to_card_done(card->priv); | |
840 | ||
727c26ed PO |
841 | |
842 | if (cause & IF_SDIO_H_INT_UPLD) { | |
843 | ret = if_sdio_card_to_host(card); | |
844 | if (ret) | |
845 | goto out; | |
846 | } | |
847 | ||
848 | ret = 0; | |
849 | ||
850 | out: | |
851 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
852 | } | |
853 | ||
854 | static int if_sdio_probe(struct sdio_func *func, | |
855 | const struct sdio_device_id *id) | |
856 | { | |
857 | struct if_sdio_card *card; | |
69f9032d | 858 | struct lbs_private *priv; |
727c26ed PO |
859 | int ret, i; |
860 | unsigned int model; | |
861 | struct if_sdio_packet *packet; | |
862 | ||
863 | lbs_deb_enter(LBS_DEB_SDIO); | |
864 | ||
865 | for (i = 0;i < func->card->num_info;i++) { | |
866 | if (sscanf(func->card->info[i], | |
867 | "802.11 SDIO ID: %x", &model) == 1) | |
868 | break; | |
869 | if (sscanf(func->card->info[i], | |
870 | "ID: %x", &model) == 1) | |
871 | break; | |
436c8854 MP |
872 | if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) { |
873 | model = 4; | |
874 | break; | |
875 | } | |
727c26ed PO |
876 | } |
877 | ||
878 | if (i == func->card->num_info) { | |
879 | lbs_pr_err("unable to identify card model\n"); | |
880 | return -ENODEV; | |
881 | } | |
882 | ||
883 | card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL); | |
884 | if (!card) | |
885 | return -ENOMEM; | |
886 | ||
887 | card->func = func; | |
888 | card->model = model; | |
889 | spin_lock_init(&card->lock); | |
890 | INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker); | |
891 | ||
892 | for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) { | |
893 | if (card->model == if_sdio_models[i].model) | |
894 | break; | |
895 | } | |
896 | ||
897 | if (i == ARRAY_SIZE(if_sdio_models)) { | |
898 | lbs_pr_err("unkown card model 0x%x\n", card->model); | |
899 | ret = -ENODEV; | |
900 | goto free; | |
901 | } | |
902 | ||
903 | card->helper = if_sdio_models[i].helper; | |
904 | card->firmware = if_sdio_models[i].firmware; | |
905 | ||
10078321 | 906 | if (lbs_helper_name) { |
727c26ed | 907 | lbs_deb_sdio("overriding helper firmware: %s\n", |
10078321 HS |
908 | lbs_helper_name); |
909 | card->helper = lbs_helper_name; | |
727c26ed PO |
910 | } |
911 | ||
10078321 HS |
912 | if (lbs_fw_name) { |
913 | lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name); | |
914 | card->firmware = lbs_fw_name; | |
727c26ed PO |
915 | } |
916 | ||
917 | sdio_claim_host(func); | |
918 | ||
919 | ret = sdio_enable_func(func); | |
920 | if (ret) | |
921 | goto release; | |
922 | ||
923 | ret = sdio_claim_irq(func, if_sdio_interrupt); | |
924 | if (ret) | |
925 | goto disable; | |
926 | ||
927 | card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret); | |
928 | if (ret) | |
929 | goto release_int; | |
930 | ||
931 | card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8; | |
932 | if (ret) | |
933 | goto release_int; | |
934 | ||
935 | card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16; | |
936 | if (ret) | |
937 | goto release_int; | |
938 | ||
939 | sdio_release_host(func); | |
940 | ||
941 | sdio_set_drvdata(func, card); | |
942 | ||
943 | lbs_deb_sdio("class = 0x%X, vendor = 0x%X, " | |
944 | "device = 0x%X, model = 0x%X, ioport = 0x%X\n", | |
945 | func->class, func->vendor, func->device, | |
946 | model, (unsigned)card->ioport); | |
947 | ||
948 | ret = if_sdio_prog_firmware(card); | |
949 | if (ret) | |
950 | goto reclaim; | |
951 | ||
10078321 | 952 | priv = lbs_add_card(card, &func->dev); |
727c26ed PO |
953 | if (!priv) { |
954 | ret = -ENOMEM; | |
955 | goto reclaim; | |
956 | } | |
957 | ||
958 | card->priv = priv; | |
959 | ||
960 | priv->card = card; | |
961 | priv->hw_host_to_card = if_sdio_host_to_card; | |
962 | priv->hw_get_int_status = if_sdio_get_int_status; | |
963 | priv->hw_read_event_cause = if_sdio_read_event_cause; | |
964 | ||
aa21c004 | 965 | priv->fw_ready = 1; |
727c26ed PO |
966 | |
967 | /* | |
968 | * Enable interrupts now that everything is set up | |
969 | */ | |
970 | sdio_claim_host(func); | |
971 | sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret); | |
972 | sdio_release_host(func); | |
973 | if (ret) | |
974 | goto reclaim; | |
975 | ||
10078321 | 976 | ret = lbs_start_card(priv); |
727c26ed PO |
977 | if (ret) |
978 | goto err_activate_card; | |
979 | ||
980 | out: | |
981 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
982 | ||
983 | return ret; | |
984 | ||
985 | err_activate_card: | |
986 | flush_scheduled_work(); | |
987 | free_netdev(priv->dev); | |
aa21c004 | 988 | kfree(priv); |
727c26ed PO |
989 | reclaim: |
990 | sdio_claim_host(func); | |
991 | release_int: | |
992 | sdio_release_irq(func); | |
993 | disable: | |
994 | sdio_disable_func(func); | |
995 | release: | |
996 | sdio_release_host(func); | |
997 | free: | |
998 | while (card->packets) { | |
999 | packet = card->packets; | |
1000 | card->packets = card->packets->next; | |
1001 | kfree(packet); | |
1002 | } | |
1003 | ||
1004 | kfree(card); | |
1005 | ||
1006 | goto out; | |
1007 | } | |
1008 | ||
1009 | static void if_sdio_remove(struct sdio_func *func) | |
1010 | { | |
1011 | struct if_sdio_card *card; | |
1012 | struct if_sdio_packet *packet; | |
1013 | ||
1014 | lbs_deb_enter(LBS_DEB_SDIO); | |
1015 | ||
1016 | card = sdio_get_drvdata(func); | |
1017 | ||
aa21c004 | 1018 | card->priv->surpriseremoved = 1; |
727c26ed PO |
1019 | |
1020 | lbs_deb_sdio("call remove card\n"); | |
10078321 HS |
1021 | lbs_stop_card(card->priv); |
1022 | lbs_remove_card(card->priv); | |
727c26ed PO |
1023 | |
1024 | flush_scheduled_work(); | |
1025 | ||
1026 | sdio_claim_host(func); | |
1027 | sdio_release_irq(func); | |
1028 | sdio_disable_func(func); | |
1029 | sdio_release_host(func); | |
1030 | ||
1031 | while (card->packets) { | |
1032 | packet = card->packets; | |
1033 | card->packets = card->packets->next; | |
1034 | kfree(packet); | |
1035 | } | |
1036 | ||
1037 | kfree(card); | |
1038 | ||
1039 | lbs_deb_leave(LBS_DEB_SDIO); | |
1040 | } | |
1041 | ||
1042 | static struct sdio_driver if_sdio_driver = { | |
1043 | .name = "libertas_sdio", | |
1044 | .id_table = if_sdio_ids, | |
1045 | .probe = if_sdio_probe, | |
1046 | .remove = if_sdio_remove, | |
1047 | }; | |
1048 | ||
1049 | /*******************************************************************/ | |
1050 | /* Module functions */ | |
1051 | /*******************************************************************/ | |
1052 | ||
4fb910fd | 1053 | static int __init if_sdio_init_module(void) |
727c26ed PO |
1054 | { |
1055 | int ret = 0; | |
1056 | ||
1057 | lbs_deb_enter(LBS_DEB_SDIO); | |
1058 | ||
1059 | printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n"); | |
1060 | printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n"); | |
1061 | ||
1062 | ret = sdio_register_driver(&if_sdio_driver); | |
1063 | ||
1064 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
1065 | ||
1066 | return ret; | |
1067 | } | |
1068 | ||
4fb910fd | 1069 | static void __exit if_sdio_exit_module(void) |
727c26ed PO |
1070 | { |
1071 | lbs_deb_enter(LBS_DEB_SDIO); | |
1072 | ||
1073 | sdio_unregister_driver(&if_sdio_driver); | |
1074 | ||
1075 | lbs_deb_leave(LBS_DEB_SDIO); | |
1076 | } | |
1077 | ||
1078 | module_init(if_sdio_init_module); | |
1079 | module_exit(if_sdio_exit_module); | |
1080 | ||
1081 | MODULE_DESCRIPTION("Libertas SDIO WLAN Driver"); | |
1082 | MODULE_AUTHOR("Pierre Ossman"); | |
1083 | MODULE_LICENSE("GPL"); |