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libertas/sdio: 8686: set ECSI bit for 1-bit transfers
[linux-2.6/kvm.git] / drivers / net / wireless / libertas / if_sdio.c
blob33206a98a5721edbb3b3e2265d01050e5da5ba1a
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 #include <linux/mmc/sdio.h>
38 #include <linux/mmc/host.h>
39
40 #include "host.h"
41 #include "decl.h"
42 #include "defs.h"
43 #include "dev.h"
44 #include "cmd.h"
45 #include "if_sdio.h"
46
47 /* The if_sdio_remove() callback function is called when
48 * user removes this module from kernel space or ejects
49 * the card from the slot. The driver handles these 2 cases
50 * differently for SD8688 combo chip.
51 * If the user is removing the module, the FUNC_SHUTDOWN
52 * command for SD8688 is sent to the firmware.
53 * If the card is removed, there is no need to send this command.
54 *
55 * The variable 'user_rmmod' is used to distinguish these two
56 * scenarios. This flag is initialized as FALSE in case the card
57 * is removed, and will be set to TRUE for module removal when
58 * module_exit function is called.
59 */
60 static u8 user_rmmod;
61
62 static char *lbs_helper_name = NULL;
63 module_param_named(helper_name, lbs_helper_name, charp, 0644);
64
65 static char *lbs_fw_name = NULL;
66 module_param_named(fw_name, lbs_fw_name, charp, 0644);
67
68 static const struct sdio_device_id if_sdio_ids[] = {
69 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
70 SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
71 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
72 SDIO_DEVICE_ID_MARVELL_8688WLAN) },
73 { /* end: all zeroes */ },
74 };
75
76 MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
77
78 struct if_sdio_model {
79 int model;
80 const char *helper;
81 const char *firmware;
82 };
83
84 static struct if_sdio_model if_sdio_models[] = {
85 {
86 /* 8385 */
87 .model = IF_SDIO_MODEL_8385,
88 .helper = "sd8385_helper.bin",
89 .firmware = "sd8385.bin",
90 },
91 {
92 /* 8686 */
93 .model = IF_SDIO_MODEL_8686,
94 .helper = "sd8686_helper.bin",
95 .firmware = "sd8686.bin",
96 },
97 {
98 /* 8688 */
99 .model = IF_SDIO_MODEL_8688,
100 .helper = "sd8688_helper.bin",
101 .firmware = "sd8688.bin",
102 },
103 };
104 MODULE_FIRMWARE("sd8385_helper.bin");
105 MODULE_FIRMWARE("sd8385.bin");
106 MODULE_FIRMWARE("sd8686_helper.bin");
107 MODULE_FIRMWARE("sd8686.bin");
108 MODULE_FIRMWARE("sd8688_helper.bin");
109 MODULE_FIRMWARE("sd8688.bin");
110
111 struct if_sdio_packet {
112 struct if_sdio_packet *next;
113 u16 nb;
114 u8 buffer[0] __attribute__((aligned(4)));
115 };
116
117 struct if_sdio_card {
118 struct sdio_func *func;
119 struct lbs_private *priv;
120
121 int model;
122 unsigned long ioport;
123 unsigned int scratch_reg;
124
125 const char *helper;
126 const char *firmware;
127
128 u8 buffer[65536];
129
130 spinlock_t lock;
131 struct if_sdio_packet *packets;
132
133 struct workqueue_struct *workqueue;
134 struct work_struct packet_worker;
135
136 u8 rx_unit;
137 };
138
139 /********************************************************************/
140 /* I/O */
141 /********************************************************************/
142
143 /*
144 * For SD8385/SD8686, this function reads firmware status after
145 * the image is downloaded, or reads RX packet length when
146 * interrupt (with IF_SDIO_H_INT_UPLD bit set) is received.
147 * For SD8688, this function reads firmware status only.
148 */
149 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
150 {
151 int ret;
152 u16 scratch;
153
154 scratch = sdio_readb(card->func, card->scratch_reg, &ret);
155 if (!ret)
156 scratch |= sdio_readb(card->func, card->scratch_reg + 1,
157 &ret) << 8;
158
159 if (err)
160 *err = ret;
161
162 if (ret)
163 return 0xffff;
164
165 return scratch;
166 }
167
168 static u8 if_sdio_read_rx_unit(struct if_sdio_card *card)
169 {
170 int ret;
171 u8 rx_unit;
172
173 rx_unit = sdio_readb(card->func, IF_SDIO_RX_UNIT, &ret);
174
175 if (ret)
176 rx_unit = 0;
177
178 return rx_unit;
179 }
180
181 static u16 if_sdio_read_rx_len(struct if_sdio_card *card, int *err)
182 {
183 int ret;
184 u16 rx_len;
185
186 switch (card->model) {
187 case IF_SDIO_MODEL_8385:
188 case IF_SDIO_MODEL_8686:
189 rx_len = if_sdio_read_scratch(card, &ret);
190 break;
191 case IF_SDIO_MODEL_8688:
192 default: /* for newer chipsets */
193 rx_len = sdio_readb(card->func, IF_SDIO_RX_LEN, &ret);
194 if (!ret)
195 rx_len <<= card->rx_unit;
196 else
197 rx_len = 0xffff; /* invalid length */
198
199 break;
200 }
201
202 if (err)
203 *err = ret;
204
205 return rx_len;
206 }
207
208 static int if_sdio_handle_cmd(struct if_sdio_card *card,
209 u8 *buffer, unsigned size)
210 {
211 struct lbs_private *priv = card->priv;
212 int ret;
213 unsigned long flags;
214 u8 i;
215
216 lbs_deb_enter(LBS_DEB_SDIO);
217
218 if (size > LBS_CMD_BUFFER_SIZE) {
219 lbs_deb_sdio("response packet too large (%d bytes)\n",
220 (int)size);
221 ret = -E2BIG;
222 goto out;
223 }
224
225 spin_lock_irqsave(&priv->driver_lock, flags);
226
227 i = (priv->resp_idx == 0) ? 1 : 0;
228 BUG_ON(priv->resp_len[i]);
229 priv->resp_len[i] = size;
230 memcpy(priv->resp_buf[i], buffer, size);
231 lbs_notify_command_response(priv, i);
232
233 spin_unlock_irqrestore(&card->priv->driver_lock, flags);
234
235 ret = 0;
236
237 out:
238 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
239 return ret;
240 }
241
242 static int if_sdio_handle_data(struct if_sdio_card *card,
243 u8 *buffer, unsigned size)
244 {
245 int ret;
246 struct sk_buff *skb;
247 char *data;
248
249 lbs_deb_enter(LBS_DEB_SDIO);
250
251 if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
252 lbs_deb_sdio("response packet too large (%d bytes)\n",
253 (int)size);
254 ret = -E2BIG;
255 goto out;
256 }
257
258 skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
259 if (!skb) {
260 ret = -ENOMEM;
261 goto out;
262 }
263
264 skb_reserve(skb, NET_IP_ALIGN);
265
266 data = skb_put(skb, size);
267
268 memcpy(data, buffer, size);
269
270 lbs_process_rxed_packet(card->priv, skb);
271
272 ret = 0;
273
274 out:
275 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
276
277 return ret;
278 }
279
280 static int if_sdio_handle_event(struct if_sdio_card *card,
281 u8 *buffer, unsigned size)
282 {
283 int ret;
284 u32 event;
285
286 lbs_deb_enter(LBS_DEB_SDIO);
287
288 if (card->model == IF_SDIO_MODEL_8385) {
289 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
290 if (ret)
291 goto out;
292
293 /* right shift 3 bits to get the event id */
294 event >>= 3;
295 } else {
296 if (size < 4) {
297 lbs_deb_sdio("event packet too small (%d bytes)\n",
298 (int)size);
299 ret = -EINVAL;
300 goto out;
301 }
302 event = buffer[3] << 24;
303 event |= buffer[2] << 16;
304 event |= buffer[1] << 8;
305 event |= buffer[0] << 0;
306 }
307
308 lbs_queue_event(card->priv, event & 0xFF);
309 ret = 0;
310
311 out:
312 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
313
314 return ret;
315 }
316
317 static int if_sdio_card_to_host(struct if_sdio_card *card)
318 {
319 int ret;
320 u8 status;
321 u16 size, type, chunk;
322 unsigned long timeout;
323
324 lbs_deb_enter(LBS_DEB_SDIO);
325
326 size = if_sdio_read_rx_len(card, &ret);
327 if (ret)
328 goto out;
329
330 if (size < 4) {
331 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
332 (int)size);
333 ret = -EINVAL;
334 goto out;
335 }
336
337 timeout = jiffies + HZ;
338 while (1) {
339 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
340 if (ret)
341 goto out;
342 if (status & IF_SDIO_IO_RDY)
343 break;
344 if (time_after(jiffies, timeout)) {
345 ret = -ETIMEDOUT;
346 goto out;
347 }
348 mdelay(1);
349 }
350
351 /*
352 * The transfer must be in one transaction or the firmware
353 * goes suicidal. There's no way to guarantee that for all
354 * controllers, but we can at least try.
355 */
356 chunk = sdio_align_size(card->func, size);
357
358 ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
359 if (ret)
360 goto out;
361
362 chunk = card->buffer[0] | (card->buffer[1] << 8);
363 type = card->buffer[2] | (card->buffer[3] << 8);
364
365 lbs_deb_sdio("packet of type %d and size %d bytes\n",
366 (int)type, (int)chunk);
367
368 if (chunk > size) {
369 lbs_deb_sdio("packet fragment (%d > %d)\n",
370 (int)chunk, (int)size);
371 ret = -EINVAL;
372 goto out;
373 }
374
375 if (chunk < size) {
376 lbs_deb_sdio("packet fragment (%d < %d)\n",
377 (int)chunk, (int)size);
378 }
379
380 switch (type) {
381 case MVMS_CMD:
382 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
383 if (ret)
384 goto out;
385 break;
386 case MVMS_DAT:
387 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
388 if (ret)
389 goto out;
390 break;
391 case MVMS_EVENT:
392 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
393 if (ret)
394 goto out;
395 break;
396 default:
397 lbs_deb_sdio("invalid type (%d) from firmware\n",
398 (int)type);
399 ret = -EINVAL;
400 goto out;
401 }
402
403 out:
404 if (ret)
405 lbs_pr_err("problem fetching packet from firmware\n");
406
407 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
408
409 return ret;
410 }
411
412 static void if_sdio_host_to_card_worker(struct work_struct *work)
413 {
414 struct if_sdio_card *card;
415 struct if_sdio_packet *packet;
416 unsigned long timeout;
417 u8 status;
418 int ret;
419 unsigned long flags;
420
421 lbs_deb_enter(LBS_DEB_SDIO);
422
423 card = container_of(work, struct if_sdio_card, packet_worker);
424
425 while (1) {
426 spin_lock_irqsave(&card->lock, flags);
427 packet = card->packets;
428 if (packet)
429 card->packets = packet->next;
430 spin_unlock_irqrestore(&card->lock, flags);
431
432 if (!packet)
433 break;
434
435 sdio_claim_host(card->func);
436
437 timeout = jiffies + HZ;
438 while (1) {
439 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
440 if (ret)
441 goto release;
442 if (status & IF_SDIO_IO_RDY)
443 break;
444 if (time_after(jiffies, timeout)) {
445 ret = -ETIMEDOUT;
446 goto release;
447 }
448 mdelay(1);
449 }
450
451 ret = sdio_writesb(card->func, card->ioport,
452 packet->buffer, packet->nb);
453 if (ret)
454 goto release;
455 release:
456 sdio_release_host(card->func);
457
458 kfree(packet);
459 }
460
461 lbs_deb_leave(LBS_DEB_SDIO);
462 }
463
464 /********************************************************************/
465 /* Firmware */
466 /********************************************************************/
467
468 static int if_sdio_prog_helper(struct if_sdio_card *card)
469 {
470 int ret;
471 u8 status;
472 const struct firmware *fw;
473 unsigned long timeout;
474 u8 *chunk_buffer;
475 u32 chunk_size;
476 const u8 *firmware;
477 size_t size;
478
479 lbs_deb_enter(LBS_DEB_SDIO);
480
481 ret = request_firmware(&fw, card->helper, &card->func->dev);
482 if (ret) {
483 lbs_pr_err("can't load helper firmware\n");
484 goto out;
485 }
486
487 chunk_buffer = kzalloc(64, GFP_KERNEL);
488 if (!chunk_buffer) {
489 ret = -ENOMEM;
490 goto release_fw;
491 }
492
493 sdio_claim_host(card->func);
494
495 ret = sdio_set_block_size(card->func, 32);
496 if (ret)
497 goto release;
498
499 firmware = fw->data;
500 size = fw->size;
501
502 while (size) {
503 timeout = jiffies + HZ;
504 while (1) {
505 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
506 if (ret)
507 goto release;
508 if ((status & IF_SDIO_IO_RDY) &&
509 (status & IF_SDIO_DL_RDY))
510 break;
511 if (time_after(jiffies, timeout)) {
512 ret = -ETIMEDOUT;
513 goto release;
514 }
515 mdelay(1);
516 }
517
518 chunk_size = min(size, (size_t)60);
519
520 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
521 memcpy(chunk_buffer + 4, firmware, chunk_size);
522 /*
523 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
524 */
525 ret = sdio_writesb(card->func, card->ioport,
526 chunk_buffer, 64);
527 if (ret)
528 goto release;
529
530 firmware += chunk_size;
531 size -= chunk_size;
532 }
533
534 /* an empty block marks the end of the transfer */
535 memset(chunk_buffer, 0, 4);
536 ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
537 if (ret)
538 goto release;
539
540 lbs_deb_sdio("waiting for helper to boot...\n");
541
542 /* wait for the helper to boot by looking at the size register */
543 timeout = jiffies + HZ;
544 while (1) {
545 u16 req_size;
546
547 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
548 if (ret)
549 goto release;
550
551 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
552 if (ret)
553 goto release;
554
555 if (req_size != 0)
556 break;
557
558 if (time_after(jiffies, timeout)) {
559 ret = -ETIMEDOUT;
560 goto release;
561 }
562
563 msleep(10);
564 }
565
566 ret = 0;
567
568 release:
569 sdio_release_host(card->func);
570 kfree(chunk_buffer);
571 release_fw:
572 release_firmware(fw);
573
574 out:
575 if (ret)
576 lbs_pr_err("failed to load helper firmware\n");
577
578 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
579
580 return ret;
581 }
582
583 static int if_sdio_prog_real(struct if_sdio_card *card)
584 {
585 int ret;
586 u8 status;
587 const struct firmware *fw;
588 unsigned long timeout;
589 u8 *chunk_buffer;
590 u32 chunk_size;
591 const u8 *firmware;
592 size_t size, req_size;
593
594 lbs_deb_enter(LBS_DEB_SDIO);
595
596 ret = request_firmware(&fw, card->firmware, &card->func->dev);
597 if (ret) {
598 lbs_pr_err("can't load firmware\n");
599 goto out;
600 }
601
602 chunk_buffer = kzalloc(512, GFP_KERNEL);
603 if (!chunk_buffer) {
604 ret = -ENOMEM;
605 goto release_fw;
606 }
607
608 sdio_claim_host(card->func);
609
610 ret = sdio_set_block_size(card->func, 32);
611 if (ret)
612 goto release;
613
614 firmware = fw->data;
615 size = fw->size;
616
617 while (size) {
618 timeout = jiffies + HZ;
619 while (1) {
620 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
621 if (ret)
622 goto release;
623 if ((status & IF_SDIO_IO_RDY) &&
624 (status & IF_SDIO_DL_RDY))
625 break;
626 if (time_after(jiffies, timeout)) {
627 ret = -ETIMEDOUT;
628 goto release;
629 }
630 mdelay(1);
631 }
632
633 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
634 if (ret)
635 goto release;
636
637 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
638 if (ret)
639 goto release;
640 /*
641 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
642 */
643 if (req_size == 0) {
644 lbs_deb_sdio("firmware helper gave up early\n");
645 ret = -EIO;
646 goto release;
647 }
648
649 if (req_size & 0x01) {
650 lbs_deb_sdio("firmware helper signalled error\n");
651 ret = -EIO;
652 goto release;
653 }
654
655 if (req_size > size)
656 req_size = size;
657
658 while (req_size) {
659 chunk_size = min(req_size, (size_t)512);
660
661 memcpy(chunk_buffer, firmware, chunk_size);
662 /*
663 lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
664 chunk_size, (chunk_size + 31) / 32 * 32);
665 */
666 ret = sdio_writesb(card->func, card->ioport,
667 chunk_buffer, roundup(chunk_size, 32));
668 if (ret)
669 goto release;
670
671 firmware += chunk_size;
672 size -= chunk_size;
673 req_size -= chunk_size;
674 }
675 }
676
677 ret = 0;
678
679 lbs_deb_sdio("waiting for firmware to boot...\n");
680
681 /* wait for the firmware to boot */
682 timeout = jiffies + HZ;
683 while (1) {
684 u16 scratch;
685
686 scratch = if_sdio_read_scratch(card, &ret);
687 if (ret)
688 goto release;
689
690 if (scratch == IF_SDIO_FIRMWARE_OK)
691 break;
692
693 if (time_after(jiffies, timeout)) {
694 ret = -ETIMEDOUT;
695 goto release;
696 }
697
698 msleep(10);
699 }
700
701 ret = 0;
702
703 release:
704 sdio_release_host(card->func);
705 kfree(chunk_buffer);
706 release_fw:
707 release_firmware(fw);
708
709 out:
710 if (ret)
711 lbs_pr_err("failed to load firmware\n");
712
713 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
714
715 return ret;
716 }
717
718 static int if_sdio_prog_firmware(struct if_sdio_card *card)
719 {
720 int ret;
721 u16 scratch;
722
723 lbs_deb_enter(LBS_DEB_SDIO);
724
725 sdio_claim_host(card->func);
726 scratch = if_sdio_read_scratch(card, &ret);
727 sdio_release_host(card->func);
728
729 if (ret)
730 goto out;
731
732 lbs_deb_sdio("firmware status = %#x\n", scratch);
733
734 if (scratch == IF_SDIO_FIRMWARE_OK) {
735 lbs_deb_sdio("firmware already loaded\n");
736 goto success;
737 }
738
739 ret = if_sdio_prog_helper(card);
740 if (ret)
741 goto out;
742
743 ret = if_sdio_prog_real(card);
744 if (ret)
745 goto out;
746
747 success:
748 sdio_claim_host(card->func);
749 sdio_set_block_size(card->func, IF_SDIO_BLOCK_SIZE);
750 sdio_release_host(card->func);
751 ret = 0;
752
753 out:
754 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
755
756 return ret;
757 }
758
759 /*******************************************************************/
760 /* Libertas callbacks */
761 /*******************************************************************/
762
763 static int if_sdio_host_to_card(struct lbs_private *priv,
764 u8 type, u8 *buf, u16 nb)
765 {
766 int ret;
767 struct if_sdio_card *card;
768 struct if_sdio_packet *packet, *cur;
769 u16 size;
770 unsigned long flags;
771
772 lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
773
774 card = priv->card;
775
776 if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
777 ret = -EINVAL;
778 goto out;
779 }
780
781 /*
782 * The transfer must be in one transaction or the firmware
783 * goes suicidal. There's no way to guarantee that for all
784 * controllers, but we can at least try.
785 */
786 size = sdio_align_size(card->func, nb + 4);
787
788 packet = kzalloc(sizeof(struct if_sdio_packet) + size,
789 GFP_ATOMIC);
790 if (!packet) {
791 ret = -ENOMEM;
792 goto out;
793 }
794
795 packet->next = NULL;
796 packet->nb = size;
797
798 /*
799 * SDIO specific header.
800 */
801 packet->buffer[0] = (nb + 4) & 0xff;
802 packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
803 packet->buffer[2] = type;
804 packet->buffer[3] = 0;
805
806 memcpy(packet->buffer + 4, buf, nb);
807
808 spin_lock_irqsave(&card->lock, flags);
809
810 if (!card->packets)
811 card->packets = packet;
812 else {
813 cur = card->packets;
814 while (cur->next)
815 cur = cur->next;
816 cur->next = packet;
817 }
818
819 switch (type) {
820 case MVMS_CMD:
821 priv->dnld_sent = DNLD_CMD_SENT;
822 break;
823 case MVMS_DAT:
824 priv->dnld_sent = DNLD_DATA_SENT;
825 break;
826 default:
827 lbs_deb_sdio("unknown packet type %d\n", (int)type);
828 }
829
830 spin_unlock_irqrestore(&card->lock, flags);
831
832 queue_work(card->workqueue, &card->packet_worker);
833
834 ret = 0;
835
836 out:
837 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
838
839 return ret;
840 }
841
842 static int if_sdio_enter_deep_sleep(struct lbs_private *priv)
843 {
844 int ret = -1;
845 struct cmd_header cmd;
846
847 memset(&cmd, 0, sizeof(cmd));
848
849 lbs_deb_sdio("send DEEP_SLEEP command\n");
850 ret = __lbs_cmd(priv, CMD_802_11_DEEP_SLEEP, &cmd, sizeof(cmd),
851 lbs_cmd_copyback, (unsigned long) &cmd);
852 if (ret)
853 lbs_pr_err("DEEP_SLEEP cmd failed\n");
854
855 mdelay(200);
856 return ret;
857 }
858
859 static int if_sdio_exit_deep_sleep(struct lbs_private *priv)
860 {
861 struct if_sdio_card *card = priv->card;
862 int ret = -1;
863
864 lbs_deb_enter(LBS_DEB_SDIO);
865 sdio_claim_host(card->func);
866
867 sdio_writeb(card->func, HOST_POWER_UP, CONFIGURATION_REG, &ret);
868 if (ret)
869 lbs_pr_err("sdio_writeb failed!\n");
870
871 sdio_release_host(card->func);
872 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
873 return ret;
874 }
875
876 static int if_sdio_reset_deep_sleep_wakeup(struct lbs_private *priv)
877 {
878 struct if_sdio_card *card = priv->card;
879 int ret = -1;
880
881 lbs_deb_enter(LBS_DEB_SDIO);
882 sdio_claim_host(card->func);
883
884 sdio_writeb(card->func, 0, CONFIGURATION_REG, &ret);
885 if (ret)
886 lbs_pr_err("sdio_writeb failed!\n");
887
888 sdio_release_host(card->func);
889 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
890 return ret;
891
892 }
893
894 /*******************************************************************/
895 /* SDIO callbacks */
896 /*******************************************************************/
897
898 static void if_sdio_interrupt(struct sdio_func *func)
899 {
900 int ret;
901 struct if_sdio_card *card;
902 u8 cause;
903
904 lbs_deb_enter(LBS_DEB_SDIO);
905
906 card = sdio_get_drvdata(func);
907
908 cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
909 if (ret)
910 goto out;
911
912 lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
913
914 sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
915 if (ret)
916 goto out;
917
918 /*
919 * Ignore the define name, this really means the card has
920 * successfully received the command.
921 */
922 card->priv->is_activity_detected = 1;
923 if (cause & IF_SDIO_H_INT_DNLD)
924 lbs_host_to_card_done(card->priv);
925
926
927 if (cause & IF_SDIO_H_INT_UPLD) {
928 ret = if_sdio_card_to_host(card);
929 if (ret)
930 goto out;
931 }
932
933 ret = 0;
934
935 out:
936 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
937 }
938
939 static int if_sdio_probe(struct sdio_func *func,
940 const struct sdio_device_id *id)
941 {
942 struct if_sdio_card *card;
943 struct lbs_private *priv;
944 int ret, i;
945 unsigned int model;
946 struct if_sdio_packet *packet;
947 struct mmc_host *host = func->card->host;
948
949 lbs_deb_enter(LBS_DEB_SDIO);
950
951 for (i = 0;i < func->card->num_info;i++) {
952 if (sscanf(func->card->info[i],
953 "802.11 SDIO ID: %x", &model) == 1)
954 break;
955 if (sscanf(func->card->info[i],
956 "ID: %x", &model) == 1)
957 break;
958 if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
959 model = IF_SDIO_MODEL_8385;
960 break;
961 }
962 }
963
964 if (i == func->card->num_info) {
965 lbs_pr_err("unable to identify card model\n");
966 return -ENODEV;
967 }
968
969 card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
970 if (!card)
971 return -ENOMEM;
972
973 card->func = func;
974 card->model = model;
975
976 switch (card->model) {
977 case IF_SDIO_MODEL_8385:
978 card->scratch_reg = IF_SDIO_SCRATCH_OLD;
979 break;
980 case IF_SDIO_MODEL_8686:
981 card->scratch_reg = IF_SDIO_SCRATCH;
982 break;
983 case IF_SDIO_MODEL_8688:
984 default: /* for newer chipsets */
985 card->scratch_reg = IF_SDIO_FW_STATUS;
986 break;
987 }
988
989 spin_lock_init(&card->lock);
990 card->workqueue = create_workqueue("libertas_sdio");
991 INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
992
993 for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
994 if (card->model == if_sdio_models[i].model)
995 break;
996 }
997
998 if (i == ARRAY_SIZE(if_sdio_models)) {
999 lbs_pr_err("unknown card model 0x%x\n", card->model);
1000 ret = -ENODEV;
1001 goto free;
1002 }
1003
1004 card->helper = if_sdio_models[i].helper;
1005 card->firmware = if_sdio_models[i].firmware;
1006
1007 if (lbs_helper_name) {
1008 lbs_deb_sdio("overriding helper firmware: %s\n",
1009 lbs_helper_name);
1010 card->helper = lbs_helper_name;
1011 }
1012
1013 if (lbs_fw_name) {
1014 lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
1015 card->firmware = lbs_fw_name;
1016 }
1017
1018 sdio_claim_host(func);
1019
1020 ret = sdio_enable_func(func);
1021 if (ret)
1022 goto release;
1023
1024 ret = sdio_claim_irq(func, if_sdio_interrupt);
1025 if (ret)
1026 goto disable;
1027
1028 /* For 1-bit transfers to the 8686 model, we need to enable the
1029 * interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0
1030 * bit to allow access to non-vendor registers. */
1031 if ((card->model == IF_SDIO_MODEL_8686) &&
1032 (host->caps & MMC_CAP_SDIO_IRQ) &&
1033 (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
1034 u8 reg;
1035
1036 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
1037 reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret);
1038 if (ret)
1039 goto release_int;
1040
1041 reg |= SDIO_BUS_ECSI;
1042 sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret);
1043 if (ret)
1044 goto release_int;
1045 }
1046
1047 card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
1048 if (ret)
1049 goto release_int;
1050
1051 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
1052 if (ret)
1053 goto release_int;
1054
1055 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
1056 if (ret)
1057 goto release_int;
1058
1059 sdio_release_host(func);
1060
1061 sdio_set_drvdata(func, card);
1062
1063 lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
1064 "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
1065 func->class, func->vendor, func->device,
1066 model, (unsigned)card->ioport);
1067
1068 ret = if_sdio_prog_firmware(card);
1069 if (ret)
1070 goto reclaim;
1071
1072 priv = lbs_add_card(card, &func->dev);
1073 if (!priv) {
1074 ret = -ENOMEM;
1075 goto reclaim;
1076 }
1077
1078 card->priv = priv;
1079
1080 priv->card = card;
1081 priv->hw_host_to_card = if_sdio_host_to_card;
1082 priv->enter_deep_sleep = if_sdio_enter_deep_sleep;
1083 priv->exit_deep_sleep = if_sdio_exit_deep_sleep;
1084 priv->reset_deep_sleep_wakeup = if_sdio_reset_deep_sleep_wakeup;
1085
1086 priv->fw_ready = 1;
1087
1088 sdio_claim_host(func);
1089
1090 /*
1091 * Get rx_unit if the chip is SD8688 or newer.
1092 * SD8385 & SD8686 do not have rx_unit.
1093 */
1094 if ((card->model != IF_SDIO_MODEL_8385)
1095 && (card->model != IF_SDIO_MODEL_8686))
1096 card->rx_unit = if_sdio_read_rx_unit(card);
1097 else
1098 card->rx_unit = 0;
1099
1100 /*
1101 * Enable interrupts now that everything is set up
1102 */
1103 sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
1104 sdio_release_host(func);
1105 if (ret)
1106 goto reclaim;
1107
1108 /*
1109 * FUNC_INIT is required for SD8688 WLAN/BT multiple functions
1110 */
1111 if (card->model == IF_SDIO_MODEL_8688) {
1112 struct cmd_header cmd;
1113
1114 memset(&cmd, 0, sizeof(cmd));
1115
1116 lbs_deb_sdio("send function INIT command\n");
1117 if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd),
1118 lbs_cmd_copyback, (unsigned long) &cmd))
1119 lbs_pr_alert("CMD_FUNC_INIT cmd failed\n");
1120 }
1121
1122 ret = lbs_start_card(priv);
1123 if (ret)
1124 goto err_activate_card;
1125
1126 out:
1127 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1128
1129 return ret;
1130
1131 err_activate_card:
1132 flush_workqueue(card->workqueue);
1133 lbs_remove_card(priv);
1134 reclaim:
1135 sdio_claim_host(func);
1136 release_int:
1137 sdio_release_irq(func);
1138 disable:
1139 sdio_disable_func(func);
1140 release:
1141 sdio_release_host(func);
1142 free:
1143 destroy_workqueue(card->workqueue);
1144 while (card->packets) {
1145 packet = card->packets;
1146 card->packets = card->packets->next;
1147 kfree(packet);
1148 }
1149
1150 kfree(card);
1151
1152 goto out;
1153 }
1154
1155 static void if_sdio_remove(struct sdio_func *func)
1156 {
1157 struct if_sdio_card *card;
1158 struct if_sdio_packet *packet;
1159
1160 lbs_deb_enter(LBS_DEB_SDIO);
1161
1162 card = sdio_get_drvdata(func);
1163
1164 if (user_rmmod && (card->model == IF_SDIO_MODEL_8688)) {
1165 /*
1166 * FUNC_SHUTDOWN is required for SD8688 WLAN/BT
1167 * multiple functions
1168 */
1169 struct cmd_header cmd;
1170
1171 memset(&cmd, 0, sizeof(cmd));
1172
1173 lbs_deb_sdio("send function SHUTDOWN command\n");
1174 if (__lbs_cmd(card->priv, CMD_FUNC_SHUTDOWN,
1175 &cmd, sizeof(cmd), lbs_cmd_copyback,
1176 (unsigned long) &cmd))
1177 lbs_pr_alert("CMD_FUNC_SHUTDOWN cmd failed\n");
1178 }
1179
1180
1181 lbs_deb_sdio("call remove card\n");
1182 lbs_stop_card(card->priv);
1183 lbs_remove_card(card->priv);
1184 card->priv->surpriseremoved = 1;
1185
1186 flush_workqueue(card->workqueue);
1187 destroy_workqueue(card->workqueue);
1188
1189 sdio_claim_host(func);
1190 sdio_release_irq(func);
1191 sdio_disable_func(func);
1192 sdio_release_host(func);
1193
1194 while (card->packets) {
1195 packet = card->packets;
1196 card->packets = card->packets->next;
1197 kfree(packet);
1198 }
1199
1200 kfree(card);
1201
1202 lbs_deb_leave(LBS_DEB_SDIO);
1203 }
1204
1205 static struct sdio_driver if_sdio_driver = {
1206 .name = "libertas_sdio",
1207 .id_table = if_sdio_ids,
1208 .probe = if_sdio_probe,
1209 .remove = if_sdio_remove,
1210 };
1211
1212 /*******************************************************************/
1213 /* Module functions */
1214 /*******************************************************************/
1215
1216 static int __init if_sdio_init_module(void)
1217 {
1218 int ret = 0;
1219
1220 lbs_deb_enter(LBS_DEB_SDIO);
1221
1222 printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1223 printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1224
1225 ret = sdio_register_driver(&if_sdio_driver);
1226
1227 /* Clear the flag in case user removes the card. */
1228 user_rmmod = 0;
1229
1230 lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1231
1232 return ret;
1233 }
1234
1235 static void __exit if_sdio_exit_module(void)
1236 {
1237 lbs_deb_enter(LBS_DEB_SDIO);
1238
1239 /* Set the flag as user is removing this module. */
1240 user_rmmod = 1;
1241
1242 sdio_unregister_driver(&if_sdio_driver);
1243
1244 lbs_deb_leave(LBS_DEB_SDIO);
1245 }
1246
1247 module_init(if_sdio_init_module);
1248 module_exit(if_sdio_exit_module);
1249
1250 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1251 MODULE_AUTHOR("Pierre Ossman");
1252 MODULE_LICENSE("GPL");
kernel-based virtual machine