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path: root/drivers/net/wireless/libertas/if_sdio.c
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Diffstat (limited to 'drivers/net/wireless/libertas/if_sdio.c')
-rw-r--r--drivers/net/wireless/libertas/if_sdio.c1079
1 files changed, 1079 insertions, 0 deletions
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
new file mode 100644
index 000000000000..a8e17076e7de
--- /dev/null
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -0,0 +1,1079 @@
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
43static char *libertas_helper_name = NULL;
44module_param_named(helper_name, libertas_helper_name, charp, 0644);
45
46static char *libertas_fw_name = NULL;
47module_param_named(fw_name, libertas_fw_name, charp, 0644);
48
49static 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
54MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
55
56struct if_sdio_model {
57 int model;
58 const char *helper;
59 const char *firmware;
60};
61
62static 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
77struct if_sdio_packet {
78 struct if_sdio_packet *next;
79 u16 nb;
80 u8 buffer[0] __attribute__((aligned(4)));
81};
82
83struct 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
106static 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
129static 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
161out:
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
169static 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);
186 if (!skb) {
187 ret = -ENOMEM;
188 goto out;
189 }
190
191 data = skb_put(skb, size);
192
193 memcpy(data, buffer, size);
194
195 libertas_process_rxed_packet(card->priv, skb);
196
197 ret = 0;
198
199out:
200 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
201
202 return ret;
203}
204
205static int if_sdio_handle_event(struct if_sdio_card *card,
206 u8 *buffer, unsigned size)
207{
208 int ret;
209 unsigned long flags;
210 u32 event;
211
212 lbs_deb_enter(LBS_DEB_SDIO);
213
214 if (card->model == 0x04) {
215 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
216 if (ret)
217 goto out;
218 } else {
219 if (size < 4) {
220 lbs_deb_sdio("event packet too small (%d bytes)\n",
221 (int)size);
222 ret = -EINVAL;
223 goto out;
224 }
225 event = buffer[3] << 24;
226 event |= buffer[2] << 16;
227 event |= buffer[1] << 8;
228 event |= buffer[0] << 0;
229 event <<= SBI_EVENT_CAUSE_SHIFT;
230 }
231
232 spin_lock_irqsave(&card->priv->adapter->driver_lock, flags);
233
234 card->event = event;
235 card->int_cause |= MRVDRV_CARDEVENT;
236
237 libertas_interrupt(card->priv->dev);
238
239 spin_unlock_irqrestore(&card->priv->adapter->driver_lock, flags);
240
241 ret = 0;
242
243out:
244 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
245
246 return ret;
247}
248
249static int if_sdio_card_to_host(struct if_sdio_card *card)
250{
251 int ret;
252 u8 status;
253 u16 size, type, chunk;
254 unsigned long timeout;
255
256 lbs_deb_enter(LBS_DEB_SDIO);
257
258 size = if_sdio_read_scratch(card, &ret);
259 if (ret)
260 goto out;
261
262 if (size < 4) {
263 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
264 (int)size);
265 ret = -EINVAL;
266 goto out;
267 }
268
269 timeout = jiffies + HZ;
270 while (1) {
271 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
272 if (ret)
273 goto out;
274 if (status & IF_SDIO_IO_RDY)
275 break;
276 if (time_after(jiffies, timeout)) {
277 ret = -ETIMEDOUT;
278 goto out;
279 }
280 mdelay(1);
281 }
282
283 /*
284 * The transfer must be in one transaction or the firmware
285 * goes suicidal.
286 */
287 chunk = size;
288 if ((chunk > card->func->cur_blksize) || (chunk > 512)) {
289 chunk = (chunk + card->func->cur_blksize - 1) /
290 card->func->cur_blksize * card->func->cur_blksize;
291 }
292
293 ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
294 if (ret)
295 goto out;
296
297 chunk = card->buffer[0] | (card->buffer[1] << 8);
298 type = card->buffer[2] | (card->buffer[3] << 8);
299
300 lbs_deb_sdio("packet of type %d and size %d bytes\n",
301 (int)type, (int)chunk);
302
303 if (chunk > size) {
304 lbs_deb_sdio("packet fragment (%d > %d)\n",
305 (int)chunk, (int)size);
306 ret = -EINVAL;
307 goto out;
308 }
309
310 if (chunk < size) {
311 lbs_deb_sdio("packet fragment (%d < %d)\n",
312 (int)chunk, (int)size);
313 }
314
315 switch (type) {
316 case MVMS_CMD:
317 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
318 if (ret)
319 goto out;
320 break;
321 case MVMS_DAT:
322 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
323 if (ret)
324 goto out;
325 break;
326 case MVMS_EVENT:
327 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
328 if (ret)
329 goto out;
330 break;
331 default:
332 lbs_deb_sdio("invalid type (%d) from firmware\n",
333 (int)type);
334 ret = -EINVAL;
335 goto out;
336 }
337
338out:
339 if (ret)
340 lbs_pr_err("problem fetching packet from firmware\n");
341
342 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
343
344 return ret;
345}
346
347static void if_sdio_host_to_card_worker(struct work_struct *work)
348{
349 struct if_sdio_card *card;
350 struct if_sdio_packet *packet;
351 unsigned long timeout;
352 u8 status;
353 int ret;
354 unsigned long flags;
355
356 lbs_deb_enter(LBS_DEB_SDIO);
357
358 card = container_of(work, struct if_sdio_card, packet_worker);
359
360 while (1) {
361 spin_lock_irqsave(&card->lock, flags);
362 packet = card->packets;
363 if (packet)
364 card->packets = packet->next;
365 spin_unlock_irqrestore(&card->lock, flags);
366
367 if (!packet)
368 break;
369
370 sdio_claim_host(card->func);
371
372 timeout = jiffies + HZ;
373 while (1) {
374 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
375 if (ret)
376 goto release;
377 if (status & IF_SDIO_IO_RDY)
378 break;
379 if (time_after(jiffies, timeout)) {
380 ret = -ETIMEDOUT;
381 goto release;
382 }
383 mdelay(1);
384 }
385
386 ret = sdio_writesb(card->func, card->ioport,
387 packet->buffer, packet->nb);
388 if (ret)
389 goto release;
390release:
391 sdio_release_host(card->func);
392
393 kfree(packet);
394 }
395
396 lbs_deb_leave(LBS_DEB_SDIO);
397}
398
399/********************************************************************/
400/* Firmware */
401/********************************************************************/
402
403static int if_sdio_prog_helper(struct if_sdio_card *card)
404{
405 int ret;
406 u8 status;
407 const struct firmware *fw;
408 unsigned long timeout;
409 u8 *chunk_buffer;
410 u32 chunk_size;
411 u8 *firmware;
412 size_t size;
413
414 lbs_deb_enter(LBS_DEB_SDIO);
415
416 ret = request_firmware(&fw, card->helper, &card->func->dev);
417 if (ret) {
418 lbs_pr_err("can't load helper firmware\n");
419 goto out;
420 }
421
422 chunk_buffer = kzalloc(64, GFP_KERNEL);
423 if (!chunk_buffer) {
424 ret = -ENOMEM;
425 goto release_fw;
426 }
427
428 sdio_claim_host(card->func);
429
430 ret = sdio_set_block_size(card->func, 32);
431 if (ret)
432 goto release;
433
434 firmware = fw->data;
435 size = fw->size;
436
437 while (size) {
438 timeout = jiffies + HZ;
439 while (1) {
440 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
441 if (ret)
442 goto release;
443 if ((status & IF_SDIO_IO_RDY) &&
444 (status & IF_SDIO_DL_RDY))
445 break;
446 if (time_after(jiffies, timeout)) {
447 ret = -ETIMEDOUT;
448 goto release;
449 }
450 mdelay(1);
451 }
452
453 chunk_size = min(size, (size_t)60);
454
455 *((u32*)chunk_buffer) = cpu_to_le32(chunk_size);
456 memcpy(chunk_buffer + 4, firmware, chunk_size);
457/*
458 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
459*/
460 ret = sdio_writesb(card->func, card->ioport,
461 chunk_buffer, 64);
462 if (ret)
463 goto release;
464
465 firmware += chunk_size;
466 size -= chunk_size;
467 }
468
469 /* an empty block marks the end of the transfer */
470 memset(chunk_buffer, 0, 4);
471 ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
472 if (ret)
473 goto release;
474
475 lbs_deb_sdio("waiting for helper to boot...\n");
476
477 /* wait for the helper to boot by looking at the size register */
478 timeout = jiffies + HZ;
479 while (1) {
480 u16 req_size;
481
482 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
483 if (ret)
484 goto release;
485
486 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
487 if (ret)
488 goto release;
489
490 if (req_size != 0)
491 break;
492
493 if (time_after(jiffies, timeout)) {
494 ret = -ETIMEDOUT;
495 goto release;
496 }
497
498 msleep(10);
499 }
500
501 ret = 0;
502
503release:
504 sdio_set_block_size(card->func, 0);
505 sdio_release_host(card->func);
506 kfree(chunk_buffer);
507release_fw:
508 release_firmware(fw);
509
510out:
511 if (ret)
512 lbs_pr_err("failed to load helper firmware\n");
513
514 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
515
516 return ret;
517}
518
519static int if_sdio_prog_real(struct if_sdio_card *card)
520{
521 int ret;
522 u8 status;
523 const struct firmware *fw;
524 unsigned long timeout;
525 u8 *chunk_buffer;
526 u32 chunk_size;
527 u8 *firmware;
528 size_t size, req_size;
529
530 lbs_deb_enter(LBS_DEB_SDIO);
531
532 ret = request_firmware(&fw, card->firmware, &card->func->dev);
533 if (ret) {
534 lbs_pr_err("can't load firmware\n");
535 goto out;
536 }
537
538 chunk_buffer = kzalloc(512, GFP_KERNEL);
539 if (!chunk_buffer) {
540 ret = -ENOMEM;
541 goto release_fw;
542 }
543
544 sdio_claim_host(card->func);
545
546 ret = sdio_set_block_size(card->func, 32);
547 if (ret)
548 goto release;
549
550 firmware = fw->data;
551 size = fw->size;
552
553 while (size) {
554 timeout = jiffies + HZ;
555 while (1) {
556 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
557 if (ret)
558 goto release;
559 if ((status & IF_SDIO_IO_RDY) &&
560 (status & IF_SDIO_DL_RDY))
561 break;
562 if (time_after(jiffies, timeout)) {
563 ret = -ETIMEDOUT;
564 goto release;
565 }
566 mdelay(1);
567 }
568
569 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
570 if (ret)
571 goto release;
572
573 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
574 if (ret)
575 goto release;
576/*
577 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
578*/
579 if (req_size == 0) {
580 lbs_deb_sdio("firmware helper gave up early\n");
581 ret = -EIO;
582 goto release;
583 }
584
585 if (req_size & 0x01) {
586 lbs_deb_sdio("firmware helper signalled error\n");
587 ret = -EIO;
588 goto release;
589 }
590
591 if (req_size > size)
592 req_size = size;
593
594 while (req_size) {
595 chunk_size = min(req_size, (size_t)512);
596
597 memcpy(chunk_buffer, firmware, chunk_size);
598/*
599 lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
600 chunk_size, (chunk_size + 31) / 32 * 32);
601*/
602 ret = sdio_writesb(card->func, card->ioport,
603 chunk_buffer, (chunk_size + 31) / 32 * 32);
604 if (ret)
605 goto release;
606
607 firmware += chunk_size;
608 size -= chunk_size;
609 req_size -= chunk_size;
610 }
611 }
612
613 ret = 0;
614
615 lbs_deb_sdio("waiting for firmware to boot...\n");
616
617 /* wait for the firmware to boot */
618 timeout = jiffies + HZ;
619 while (1) {
620 u16 scratch;
621
622 scratch = if_sdio_read_scratch(card, &ret);
623 if (ret)
624 goto release;
625
626 if (scratch == IF_SDIO_FIRMWARE_OK)
627 break;
628
629 if (time_after(jiffies, timeout)) {
630 ret = -ETIMEDOUT;
631 goto release;
632 }
633
634 msleep(10);
635 }
636
637 ret = 0;
638
639release:
640 sdio_set_block_size(card->func, 0);
641 sdio_release_host(card->func);
642 kfree(chunk_buffer);
643release_fw:
644 release_firmware(fw);
645
646out:
647 if (ret)
648 lbs_pr_err("failed to load firmware\n");
649
650 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
651
652 return ret;
653}
654
655static int if_sdio_prog_firmware(struct if_sdio_card *card)
656{
657 int ret;
658 u16 scratch;
659
660 lbs_deb_enter(LBS_DEB_SDIO);
661
662 sdio_claim_host(card->func);
663 scratch = if_sdio_read_scratch(card, &ret);
664 sdio_release_host(card->func);
665
666 if (ret)
667 goto out;
668
669 if (scratch == IF_SDIO_FIRMWARE_OK) {
670 lbs_deb_sdio("firmware already loaded\n");
671 goto success;
672 }
673
674 ret = if_sdio_prog_helper(card);
675 if (ret)
676 goto out;
677
678 ret = if_sdio_prog_real(card);
679 if (ret)
680 goto out;
681
682success:
683 ret = 0;
684
685out:
686 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
687
688 return ret;
689}
690
691/*******************************************************************/
692/* Libertas callbacks */
693/*******************************************************************/
694
695static int if_sdio_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)
696{
697 int ret;
698 struct if_sdio_card *card;
699 struct if_sdio_packet *packet, *cur;
700 u16 size;
701 unsigned long flags;
702
703 lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
704
705 card = priv->card;
706
707 if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
708 ret = -EINVAL;
709 goto out;
710 }
711
712 /*
713 * The transfer must be in one transaction or the firmware
714 * goes suicidal.
715 */
716 size = nb + 4;
717 if ((size > card->func->cur_blksize) || (size > 512)) {
718 size = (size + card->func->cur_blksize - 1) /
719 card->func->cur_blksize * card->func->cur_blksize;
720 }
721
722 packet = kzalloc(sizeof(struct if_sdio_packet) + size,
723 GFP_ATOMIC);
724 if (!packet) {
725 ret = -ENOMEM;
726 goto out;
727 }
728
729 packet->next = NULL;
730 packet->nb = size;
731
732 /*
733 * SDIO specific header.
734 */
735 packet->buffer[0] = (nb + 4) & 0xff;
736 packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
737 packet->buffer[2] = type;
738 packet->buffer[3] = 0;
739
740 memcpy(packet->buffer + 4, buf, nb);
741
742 spin_lock_irqsave(&card->lock, flags);
743
744 if (!card->packets)
745 card->packets = packet;
746 else {
747 cur = card->packets;
748 while (cur->next)
749 cur = cur->next;
750 cur->next = packet;
751 }
752
753 switch (type) {
754 case MVMS_CMD:
755 priv->dnld_sent = DNLD_CMD_SENT;
756 break;
757 case MVMS_DAT:
758 priv->dnld_sent = DNLD_DATA_SENT;
759 break;
760 default:
761 lbs_deb_sdio("unknown packet type %d\n", (int)type);
762 }
763
764 spin_unlock_irqrestore(&card->lock, flags);
765
766 schedule_work(&card->packet_worker);
767
768 ret = 0;
769
770out:
771 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
772
773 return ret;
774}
775
776static int if_sdio_get_int_status(wlan_private *priv, u8 *ireg)
777{
778 struct if_sdio_card *card;
779
780 lbs_deb_enter(LBS_DEB_SDIO);
781
782 card = priv->card;
783
784 *ireg = card->int_cause;
785 card->int_cause = 0;
786
787 lbs_deb_leave(LBS_DEB_SDIO);
788
789 return 0;
790}
791
792static int if_sdio_read_event_cause(wlan_private *priv)
793{
794 struct if_sdio_card *card;
795
796 lbs_deb_enter(LBS_DEB_SDIO);
797
798 card = priv->card;
799
800 priv->adapter->eventcause = card->event;
801
802 lbs_deb_leave(LBS_DEB_SDIO);
803
804 return 0;
805}
806
807/*******************************************************************/
808/* SDIO callbacks */
809/*******************************************************************/
810
811static void if_sdio_interrupt(struct sdio_func *func)
812{
813 int ret;
814 struct if_sdio_card *card;
815 u8 cause;
816
817 lbs_deb_enter(LBS_DEB_SDIO);
818
819 card = sdio_get_drvdata(func);
820
821 cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
822 if (ret)
823 goto out;
824
825 lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
826
827 sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
828 if (ret)
829 goto out;
830
831 /*
832 * Ignore the define name, this really means the card has
833 * successfully received the command.
834 */
835 if (cause & IF_SDIO_H_INT_DNLD) {
836 if ((card->priv->dnld_sent == DNLD_DATA_SENT) &&
837 (card->priv->adapter->connect_status == LIBERTAS_CONNECTED))
838 netif_wake_queue(card->priv->dev);
839 card->priv->dnld_sent = DNLD_RES_RECEIVED;
840 }
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
850out:
851 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
852}
853
854static int if_sdio_probe(struct sdio_func *func,
855 const struct sdio_device_id *id)
856{
857 struct if_sdio_card *card;
858 wlan_private *priv;
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;
872 }
873
874 if (i == func->card->num_info) {
875 lbs_pr_err("unable to identify card model\n");
876 return -ENODEV;
877 }
878
879 card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
880 if (!card)
881 return -ENOMEM;
882
883 card->func = func;
884 card->model = model;
885 spin_lock_init(&card->lock);
886 INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
887
888 for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
889 if (card->model == if_sdio_models[i].model)
890 break;
891 }
892
893 if (i == ARRAY_SIZE(if_sdio_models)) {
894 lbs_pr_err("unkown card model 0x%x\n", card->model);
895 ret = -ENODEV;
896 goto free;
897 }
898
899 card->helper = if_sdio_models[i].helper;
900 card->firmware = if_sdio_models[i].firmware;
901
902 if (libertas_helper_name) {
903 lbs_deb_sdio("overriding helper firmware: %s\n",
904 libertas_helper_name);
905 card->helper = libertas_helper_name;
906 }
907
908 if (libertas_fw_name) {
909 lbs_deb_sdio("overriding firmware: %s\n", libertas_fw_name);
910 card->firmware = libertas_fw_name;
911 }
912
913 sdio_claim_host(func);
914
915 ret = sdio_enable_func(func);
916 if (ret)
917 goto release;
918
919 ret = sdio_claim_irq(func, if_sdio_interrupt);
920 if (ret)
921 goto disable;
922
923 card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
924 if (ret)
925 goto release_int;
926
927 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
928 if (ret)
929 goto release_int;
930
931 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
932 if (ret)
933 goto release_int;
934
935 sdio_release_host(func);
936
937 sdio_set_drvdata(func, card);
938
939 lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
940 "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
941 func->class, func->vendor, func->device,
942 model, (unsigned)card->ioport);
943
944 ret = if_sdio_prog_firmware(card);
945 if (ret)
946 goto reclaim;
947
948 priv = libertas_add_card(card, &func->dev);
949 if (!priv) {
950 ret = -ENOMEM;
951 goto reclaim;
952 }
953
954 card->priv = priv;
955
956 priv->card = card;
957 priv->hw_host_to_card = if_sdio_host_to_card;
958 priv->hw_get_int_status = if_sdio_get_int_status;
959 priv->hw_read_event_cause = if_sdio_read_event_cause;
960
961 priv->adapter->fw_ready = 1;
962
963 /*
964 * Enable interrupts now that everything is set up
965 */
966 sdio_claim_host(func);
967 sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
968 sdio_release_host(func);
969 if (ret)
970 goto reclaim;
971
972 ret = libertas_start_card(priv);
973 if (ret)
974 goto err_activate_card;
975
976out:
977 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
978
979 return ret;
980
981err_activate_card:
982 flush_scheduled_work();
983 free_netdev(priv->dev);
984 kfree(priv->adapter);
985reclaim:
986 sdio_claim_host(func);
987release_int:
988 sdio_release_irq(func);
989disable:
990 sdio_disable_func(func);
991release:
992 sdio_release_host(func);
993free:
994 while (card->packets) {
995 packet = card->packets;
996 card->packets = card->packets->next;
997 kfree(packet);
998 }
999
1000 kfree(card);
1001
1002 goto out;
1003}
1004
1005static void if_sdio_remove(struct sdio_func *func)
1006{
1007 struct if_sdio_card *card;
1008 struct if_sdio_packet *packet;
1009
1010 lbs_deb_enter(LBS_DEB_SDIO);
1011
1012 card = sdio_get_drvdata(func);
1013
1014 card->priv->adapter->surpriseremoved = 1;
1015
1016 lbs_deb_sdio("call remove card\n");
1017 libertas_stop_card(card->priv);
1018 libertas_remove_card(card->priv);
1019
1020 flush_scheduled_work();
1021
1022 sdio_claim_host(func);
1023 sdio_release_irq(func);
1024 sdio_disable_func(func);
1025 sdio_release_host(func);
1026
1027 while (card->packets) {
1028 packet = card->packets;
1029 card->packets = card->packets->next;
1030 kfree(packet);
1031 }
1032
1033 kfree(card);
1034
1035 lbs_deb_leave(LBS_DEB_SDIO);
1036}
1037
1038static struct sdio_driver if_sdio_driver = {
1039 .name = "libertas_sdio",
1040 .id_table = if_sdio_ids,
1041 .probe = if_sdio_probe,
1042 .remove = if_sdio_remove,
1043};
1044
1045/*******************************************************************/
1046/* Module functions */
1047/*******************************************************************/
1048
1049static int if_sdio_init_module(void)
1050{
1051 int ret = 0;
1052
1053 lbs_deb_enter(LBS_DEB_SDIO);
1054
1055 printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1056 printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1057
1058 ret = sdio_register_driver(&if_sdio_driver);
1059
1060 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1061
1062 return ret;
1063}
1064
1065static void if_sdio_exit_module(void)
1066{
1067 lbs_deb_enter(LBS_DEB_SDIO);
1068
1069 sdio_unregister_driver(&if_sdio_driver);
1070
1071 lbs_deb_leave(LBS_DEB_SDIO);
1072}
1073
1074module_init(if_sdio_init_module);
1075module_exit(if_sdio_exit_module);
1076
1077MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1078MODULE_AUTHOR("Pierre Ossman");
1079MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 23:52:48 -0500