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Pull bugzilla-9429 into release branch
[pv_ops_mirror.git] / drivers / net / wireless / libertas / if_sdio.c
blobb24425f748830b9767a290d3aac038cf6b64caf9
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
43 static char *libertas_helper_name = NULL;
44 module_param_named(helper_name, libertas_helper_name, charp, 0644);
45
46 static char *libertas_fw_name = NULL;
47 module_param_named(fw_name, libertas_fw_name, charp, 0644);
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;
85 wlan_private *priv;
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
137 spin_lock_irqsave(&card->priv->adapter->driver_lock, flags);
138
139 if (!card->priv->adapter->cur_cmd) {
140 lbs_deb_sdio("discarding spurious response\n");
141 ret = 0;
142 goto out;
143 }
144
145 if (size > MRVDRV_SIZE_OF_CMD_BUFFER) {
146 lbs_deb_sdio("response packet too large (%d bytes)\n",
147 (int)size);
148 ret = -E2BIG;
149 goto out;
150 }
151
152 memcpy(card->priv->adapter->cur_cmd->bufvirtualaddr, buffer, size);
153 card->priv->upld_len = size;
154
155 card->int_cause |= MRVDRV_CMD_UPLD_RDY;
156
157 libertas_interrupt(card->priv->dev);
158
159 ret = 0;
160
161 out:
162 spin_unlock_irqrestore(&card->priv->adapter->driver_lock, flags);
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
185 skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
186 if (!skb) {
187 ret = -ENOMEM;
188 goto out;
189 }
190
191 skb_reserve(skb, NET_IP_ALIGN);
192
193 data = skb_put(skb, size);
194
195 memcpy(data, buffer, size);
196
197 libertas_process_rxed_packet(card->priv, skb);
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
234 spin_lock_irqsave(&card->priv->adapter->driver_lock, flags);
235
236 card->event = event;
237 card->int_cause |= MRVDRV_CARDEVENT;
238
239 libertas_interrupt(card->priv->dev);
240
241 spin_unlock_irqrestore(&card->priv->adapter->driver_lock, flags);
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
457 *((u32*)chunk_buffer) = cpu_to_le32(chunk_size);
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
697 static int if_sdio_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)
698 {
699 int ret;
700 struct if_sdio_card *card;
701 struct if_sdio_packet *packet, *cur;
702 u16 size;
703 unsigned long flags;
704
705 lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
706
707 card = priv->card;
708
709 if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
710 ret = -EINVAL;
711 goto out;
712 }
713
714 /*
715 * The transfer must be in one transaction or the firmware
716 * goes suicidal.
717 */
718 size = nb + 4;
719 if ((size > card->func->cur_blksize) || (size > 512)) {
720 size = (size + card->func->cur_blksize - 1) /
721 card->func->cur_blksize * card->func->cur_blksize;
722 }
723
724 packet = kzalloc(sizeof(struct if_sdio_packet) + size,
725 GFP_ATOMIC);
726 if (!packet) {
727 ret = -ENOMEM;
728 goto out;
729 }
730
731 packet->next = NULL;
732 packet->nb = size;
733
734 /*
735 * SDIO specific header.
736 */
737 packet->buffer[0] = (nb + 4) & 0xff;
738 packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
739 packet->buffer[2] = type;
740 packet->buffer[3] = 0;
741
742 memcpy(packet->buffer + 4, buf, nb);
743
744 spin_lock_irqsave(&card->lock, flags);
745
746 if (!card->packets)
747 card->packets = packet;
748 else {
749 cur = card->packets;
750 while (cur->next)
751 cur = cur->next;
752 cur->next = packet;
753 }
754
755 switch (type) {
756 case MVMS_CMD:
757 priv->dnld_sent = DNLD_CMD_SENT;
758 break;
759 case MVMS_DAT:
760 priv->dnld_sent = DNLD_DATA_SENT;
761 break;
762 default:
763 lbs_deb_sdio("unknown packet type %d\n", (int)type);
764 }
765
766 spin_unlock_irqrestore(&card->lock, flags);
767
768 schedule_work(&card->packet_worker);
769
770 ret = 0;
771
772 out:
773 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
774
775 return ret;
776 }
777
778 static int if_sdio_get_int_status(wlan_private *priv, u8 *ireg)
779 {
780 struct if_sdio_card *card;
781
782 lbs_deb_enter(LBS_DEB_SDIO);
783
784 card = priv->card;
785
786 *ireg = card->int_cause;
787 card->int_cause = 0;
788
789 lbs_deb_leave(LBS_DEB_SDIO);
790
791 return 0;
792 }
793
794 static int if_sdio_read_event_cause(wlan_private *priv)
795 {
796 struct if_sdio_card *card;
797
798 lbs_deb_enter(LBS_DEB_SDIO);
799
800 card = priv->card;
801
802 priv->adapter->eventcause = card->event;
803
804 lbs_deb_leave(LBS_DEB_SDIO);
805
806 return 0;
807 }
808
809 /*******************************************************************/
810 /* SDIO callbacks */
811 /*******************************************************************/
812
813 static void if_sdio_interrupt(struct sdio_func *func)
814 {
815 int ret;
816 struct if_sdio_card *card;
817 u8 cause;
818
819 lbs_deb_enter(LBS_DEB_SDIO);
820
821 card = sdio_get_drvdata(func);
822
823 cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
824 if (ret)
825 goto out;
826
827 lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
828
829 sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
830 if (ret)
831 goto out;
832
833 /*
834 * Ignore the define name, this really means the card has
835 * successfully received the command.
836 */
837 if (cause & IF_SDIO_H_INT_DNLD) {
838 if ((card->priv->dnld_sent == DNLD_DATA_SENT) &&
839 (card->priv->adapter->connect_status == LIBERTAS_CONNECTED))
840 netif_wake_queue(card->priv->dev);
841 card->priv->dnld_sent = DNLD_RES_RECEIVED;
842 }
843
844 if (cause & IF_SDIO_H_INT_UPLD) {
845 ret = if_sdio_card_to_host(card);
846 if (ret)
847 goto out;
848 }
849
850 ret = 0;
851
852 out:
853 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
854 }
855
856 static int if_sdio_probe(struct sdio_func *func,
857 const struct sdio_device_id *id)
858 {
859 struct if_sdio_card *card;
860 wlan_private *priv;
861 int ret, i;
862 unsigned int model;
863 struct if_sdio_packet *packet;
864
865 lbs_deb_enter(LBS_DEB_SDIO);
866
867 for (i = 0;i < func->card->num_info;i++) {
868 if (sscanf(func->card->info[i],
869 "802.11 SDIO ID: %x", &model) == 1)
870 break;
871 if (sscanf(func->card->info[i],
872 "ID: %x", &model) == 1)
873 break;
874 }
875
876 if (i == func->card->num_info) {
877 lbs_pr_err("unable to identify card model\n");
878 return -ENODEV;
879 }
880
881 card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
882 if (!card)
883 return -ENOMEM;
884
885 card->func = func;
886 card->model = model;
887 spin_lock_init(&card->lock);
888 INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
889
890 for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
891 if (card->model == if_sdio_models[i].model)
892 break;
893 }
894
895 if (i == ARRAY_SIZE(if_sdio_models)) {
896 lbs_pr_err("unkown card model 0x%x\n", card->model);
897 ret = -ENODEV;
898 goto free;
899 }
900
901 card->helper = if_sdio_models[i].helper;
902 card->firmware = if_sdio_models[i].firmware;
903
904 if (libertas_helper_name) {
905 lbs_deb_sdio("overriding helper firmware: %s\n",
906 libertas_helper_name);
907 card->helper = libertas_helper_name;
908 }
909
910 if (libertas_fw_name) {
911 lbs_deb_sdio("overriding firmware: %s\n", libertas_fw_name);
912 card->firmware = libertas_fw_name;
913 }
914
915 sdio_claim_host(func);
916
917 ret = sdio_enable_func(func);
918 if (ret)
919 goto release;
920
921 ret = sdio_claim_irq(func, if_sdio_interrupt);
922 if (ret)
923 goto disable;
924
925 card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
926 if (ret)
927 goto release_int;
928
929 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
930 if (ret)
931 goto release_int;
932
933 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
934 if (ret)
935 goto release_int;
936
937 sdio_release_host(func);
938
939 sdio_set_drvdata(func, card);
940
941 lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
942 "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
943 func->class, func->vendor, func->device,
944 model, (unsigned)card->ioport);
945
946 ret = if_sdio_prog_firmware(card);
947 if (ret)
948 goto reclaim;
949
950 priv = libertas_add_card(card, &func->dev);
951 if (!priv) {
952 ret = -ENOMEM;
953 goto reclaim;
954 }
955
956 card->priv = priv;
957
958 priv->card = card;
959 priv->hw_host_to_card = if_sdio_host_to_card;
960 priv->hw_get_int_status = if_sdio_get_int_status;
961 priv->hw_read_event_cause = if_sdio_read_event_cause;
962
963 priv->adapter->fw_ready = 1;
964
965 /*
966 * Enable interrupts now that everything is set up
967 */
968 sdio_claim_host(func);
969 sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
970 sdio_release_host(func);
971 if (ret)
972 goto reclaim;
973
974 ret = libertas_start_card(priv);
975 if (ret)
976 goto err_activate_card;
977
978 out:
979 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
980
981 return ret;
982
983 err_activate_card:
984 flush_scheduled_work();
985 free_netdev(priv->dev);
986 kfree(priv->adapter);
987 reclaim:
988 sdio_claim_host(func);
989 release_int:
990 sdio_release_irq(func);
991 disable:
992 sdio_disable_func(func);
993 release:
994 sdio_release_host(func);
995 free:
996 while (card->packets) {
997 packet = card->packets;
998 card->packets = card->packets->next;
999 kfree(packet);
1000 }
1001
1002 kfree(card);
1003
1004 goto out;
1005 }
1006
1007 static void if_sdio_remove(struct sdio_func *func)
1008 {
1009 struct if_sdio_card *card;
1010 struct if_sdio_packet *packet;
1011
1012 lbs_deb_enter(LBS_DEB_SDIO);
1013
1014 card = sdio_get_drvdata(func);
1015
1016 card->priv->adapter->surpriseremoved = 1;
1017
1018 lbs_deb_sdio("call remove card\n");
1019 libertas_stop_card(card->priv);
1020 libertas_remove_card(card->priv);
1021
1022 flush_scheduled_work();
1023
1024 sdio_claim_host(func);
1025 sdio_release_irq(func);
1026 sdio_disable_func(func);
1027 sdio_release_host(func);
1028
1029 while (card->packets) {
1030 packet = card->packets;
1031 card->packets = card->packets->next;
1032 kfree(packet);
1033 }
1034
1035 kfree(card);
1036
1037 lbs_deb_leave(LBS_DEB_SDIO);
1038 }
1039
1040 static struct sdio_driver if_sdio_driver = {
1041 .name = "libertas_sdio",
1042 .id_table = if_sdio_ids,
1043 .probe = if_sdio_probe,
1044 .remove = if_sdio_remove,
1045 };
1046
1047 /*******************************************************************/
1048 /* Module functions */
1049 /*******************************************************************/
1050
1051 static int if_sdio_init_module(void)
1052 {
1053 int ret = 0;
1054
1055 lbs_deb_enter(LBS_DEB_SDIO);
1056
1057 printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1058 printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1059
1060 ret = sdio_register_driver(&if_sdio_driver);
1061
1062 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1063
1064 return ret;
1065 }
1066
1067 static void if_sdio_exit_module(void)
1068 {
1069 lbs_deb_enter(LBS_DEB_SDIO);
1070
1071 sdio_unregister_driver(&if_sdio_driver);
1072
1073 lbs_deb_leave(LBS_DEB_SDIO);
1074 }
1075
1076 module_init(if_sdio_init_module);
1077 module_exit(if_sdio_exit_module);
1078
1079 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1080 MODULE_AUTHOR("Pierre Ossman");
1081 MODULE_LICENSE("GPL");
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