1 /*
2 * linux/drivers/net/wireless/libertas/if_sdio.c
3 *
4 * Copyright 2007-2008 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/kernel.h>
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
44 static char *lbs_helper_name = NULL;
45 module_param_named(helper_name, lbs_helper_name, charp, 0644);
46
47 static char *lbs_fw_name = NULL;
48 module_param_named(fw_name, lbs_fw_name, charp, 0644);
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;
86 struct lbs_private *priv;
87
88 int model;
89 unsigned long ioport;
90
91 const char *helper;
92 const char *firmware;
93
94 u8 buffer[65536];
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
if_sdio_read_scratch(struct if_sdio_card * card,int * err)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
if_sdio_handle_cmd(struct if_sdio_card * card,u8 * buffer,unsigned size)128 static int if_sdio_handle_cmd(struct if_sdio_card *card,
129 u8 *buffer, unsigned size)
130 {
131 struct lbs_private *priv = card->priv;
132 int ret;
133 unsigned long flags;
134 u8 i;
135
136 lbs_deb_enter(LBS_DEB_SDIO);
137
138 if (size > LBS_CMD_BUFFER_SIZE) {
139 lbs_deb_sdio("response packet too large (%d bytes)\n",
140 (int)size);
141 ret = -E2BIG;
142 goto out;
143 }
144
145 spin_lock_irqsave(&priv->driver_lock, flags);
146
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);
152
153 spin_unlock_irqrestore(&card->priv->driver_lock, flags);
154
155 ret = 0;
156
157 out:
158 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
159 return ret;
160 }
161
if_sdio_handle_data(struct if_sdio_card * card,u8 * buffer,unsigned size)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
178 skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
179 if (!skb) {
180 ret = -ENOMEM;
181 goto out;
182 }
183
184 skb_reserve(skb, NET_IP_ALIGN);
185
186 data = skb_put(skb, size);
187
188 memcpy(data, buffer, size);
189
190 lbs_process_rxed_packet(card->priv, skb);
191
192 ret = 0;
193
194 out:
195 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
196
197 return ret;
198 }
199
if_sdio_handle_event(struct if_sdio_card * card,u8 * buffer,unsigned size)200 static int if_sdio_handle_event(struct if_sdio_card *card,
201 u8 *buffer, unsigned size)
202 {
203 int ret;
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;
223 }
224
225 lbs_queue_event(card->priv, event & 0xFF);
226 ret = 0;
227
228 out:
229 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
230
231 return ret;
232 }
233
if_sdio_card_to_host(struct if_sdio_card * card)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
270 * goes suicidal. There's no way to guarantee that for all
271 * controllers, but we can at least try.
272 */
273 chunk = sdio_align_size(card->func, size);
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
if_sdio_host_to_card_worker(struct work_struct * work)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
if_sdio_prog_helper(struct if_sdio_card * card)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;
393 const u8 *firmware;
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
437 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
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
if_sdio_prog_real(struct if_sdio_card * card)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;
509 const u8 *firmware;
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,
585 chunk_buffer, roundup(chunk_size, 32));
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
if_sdio_prog_firmware(struct if_sdio_card * card)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
if_sdio_host_to_card(struct lbs_private * priv,u8 type,u8 * buf,u16 nb)677 static int if_sdio_host_to_card(struct lbs_private *priv,
678 u8 type, u8 *buf, u16 nb)
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
697 * goes suicidal. There's no way to guarantee that for all
698 * controllers, but we can at least try.
699 */
700 size = sdio_align_size(card->func, nb + 4);
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
756 /*******************************************************************/
757 /* SDIO callbacks */
758 /*******************************************************************/
759
if_sdio_interrupt(struct sdio_func * func)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 */
784 if (cause & IF_SDIO_H_INT_DNLD)
785 lbs_host_to_card_done(card->priv);
786
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
if_sdio_probe(struct sdio_func * func,const struct sdio_device_id * id)800 static int if_sdio_probe(struct sdio_func *func,
801 const struct sdio_device_id *id)
802 {
803 struct if_sdio_card *card;
804 struct lbs_private *priv;
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;
818 if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
819 model = 4;
820 break;
821 }
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
852 if (lbs_helper_name) {
853 lbs_deb_sdio("overriding helper firmware: %s\n",
854 lbs_helper_name);
855 card->helper = lbs_helper_name;
856 }
857
858 if (lbs_fw_name) {
859 lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
860 card->firmware = lbs_fw_name;
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
898 priv = lbs_add_card(card, &func->dev);
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;
908
909 priv->fw_ready = 1;
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
920 ret = lbs_start_card(priv);
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);
932 kfree(priv);
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
if_sdio_remove(struct sdio_func * func)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
962 card->priv->surpriseremoved = 1;
963
964 lbs_deb_sdio("call remove card\n");
965 lbs_stop_card(card->priv);
966 lbs_remove_card(card->priv);
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
if_sdio_init_module(void)997 static int __init if_sdio_init_module(void)
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
if_sdio_exit_module(void)1013 static void __exit if_sdio_exit_module(void)
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");
1028