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path: root/drivers/bluetooth/btmrvl_sdio.c
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Diffstat (limited to 'drivers/bluetooth/btmrvl_sdio.c')
-rw-r--r--drivers/bluetooth/btmrvl_sdio.c1003
1 files changed, 1003 insertions, 0 deletions
diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
new file mode 100644
index 000000000000..5b33b85790f2
--- /dev/null
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -0,0 +1,1003 @@
1/**
2 * Marvell BT-over-SDIO driver: SDIO interface related functions.
3 *
4 * Copyright (C) 2009, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 *
15 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
17 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
18 * this warranty disclaimer.
19 **/
20
21#include <linux/firmware.h>
22
23#include <linux/mmc/sdio_ids.h>
24#include <linux/mmc/sdio_func.h>
25
26#include <net/bluetooth/bluetooth.h>
27#include <net/bluetooth/hci_core.h>
28
29#include "btmrvl_drv.h"
30#include "btmrvl_sdio.h"
31
32#define VERSION "1.0"
33
34/* The btmrvl_sdio_remove() callback function is called
35 * when user removes this module from kernel space or ejects
36 * the card from the slot. The driver handles these 2 cases
37 * differently.
38 * If the user is removing the module, a MODULE_SHUTDOWN_REQ
39 * command is sent to firmware and interrupt will be disabled.
40 * If the card is removed, there is no need to send command
41 * or disable interrupt.
42 *
43 * The variable 'user_rmmod' is used to distinguish these two
44 * scenarios. This flag is initialized as FALSE in case the card
45 * is removed, and will be set to TRUE for module removal when
46 * module_exit function is called.
47 */
48static u8 user_rmmod;
49
50static const struct btmrvl_sdio_device btmrvl_sdio_sd6888 = {
51 .helper = "sd8688_helper.bin",
52 .firmware = "sd8688.bin",
53};
54
55static const struct sdio_device_id btmrvl_sdio_ids[] = {
56 /* Marvell SD8688 Bluetooth device */
57 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
58 .driver_data = (unsigned long) &btmrvl_sdio_sd6888 },
59
60 { } /* Terminating entry */
61};
62
63MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
64
65static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
66{
67 u8 reg;
68 int ret;
69
70 reg = sdio_readb(card->func, CARD_RX_UNIT_REG, &ret);
71 if (!ret)
72 card->rx_unit = reg;
73
74 return ret;
75}
76
77static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
78{
79 u8 fws0, fws1;
80 int ret;
81
82 *dat = 0;
83
84 fws0 = sdio_readb(card->func, CARD_FW_STATUS0_REG, &ret);
85
86 if (!ret)
87 fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
88
89 if (ret)
90 return -EIO;
91
92 *dat = (((u16) fws1) << 8) | fws0;
93
94 return 0;
95}
96
97static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
98{
99 u8 reg;
100 int ret;
101
102 reg = sdio_readb(card->func, CARD_RX_LEN_REG, &ret);
103 if (!ret)
104 *dat = (u16) reg << card->rx_unit;
105
106 return ret;
107}
108
109static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
110 u8 mask)
111{
112 int ret;
113
114 sdio_writeb(card->func, mask, HOST_INT_MASK_REG, &ret);
115 if (ret) {
116 BT_ERR("Unable to enable the host interrupt!");
117 ret = -EIO;
118 }
119
120 return ret;
121}
122
123static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
124 u8 mask)
125{
126 u8 host_int_mask;
127 int ret;
128
129 host_int_mask = sdio_readb(card->func, HOST_INT_MASK_REG, &ret);
130 if (ret)
131 return -EIO;
132
133 host_int_mask &= ~mask;
134
135 sdio_writeb(card->func, host_int_mask, HOST_INT_MASK_REG, &ret);
136 if (ret < 0) {
137 BT_ERR("Unable to disable the host interrupt!");
138 return -EIO;
139 }
140
141 return 0;
142}
143
144static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
145{
146 unsigned int tries;
147 u8 status;
148 int ret;
149
150 for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
151 status = sdio_readb(card->func, CARD_STATUS_REG, &ret);
152 if (ret)
153 goto failed;
154 if ((status & bits) == bits)
155 return ret;
156
157 udelay(1);
158 }
159
160 ret = -ETIMEDOUT;
161
162failed:
163 BT_ERR("FAILED! ret=%d", ret);
164
165 return ret;
166}
167
168static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
169 int pollnum)
170{
171 int ret = -ETIMEDOUT;
172 u16 firmwarestat;
173 unsigned int tries;
174
175 /* Wait for firmware to become ready */
176 for (tries = 0; tries < pollnum; tries++) {
177 if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
178 continue;
179
180 if (firmwarestat == FIRMWARE_READY) {
181 ret = 0;
182 break;
183 } else {
184 msleep(10);
185 }
186 }
187
188 return ret;
189}
190
191static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
192{
193 const struct firmware *fw_helper = NULL;
194 const u8 *helper = NULL;
195 int ret;
196 void *tmphlprbuf = NULL;
197 int tmphlprbufsz, hlprblknow, helperlen;
198 u8 *helperbuf;
199 u32 tx_len;
200
201 ret = request_firmware(&fw_helper, card->helper,
202 &card->func->dev);
203 if ((ret < 0) || !fw_helper) {
204 BT_ERR("request_firmware(helper) failed, error code = %d",
205 ret);
206 ret = -ENOENT;
207 goto done;
208 }
209
210 helper = fw_helper->data;
211 helperlen = fw_helper->size;
212
213 BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
214 helperlen, SDIO_BLOCK_SIZE);
215
216 tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
217
218 tmphlprbuf = kmalloc(tmphlprbufsz, GFP_KERNEL);
219 if (!tmphlprbuf) {
220 BT_ERR("Unable to allocate buffer for helper."
221 " Terminating download");
222 ret = -ENOMEM;
223 goto done;
224 }
225
226 memset(tmphlprbuf, 0, tmphlprbufsz);
227
228 helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
229
230 /* Perform helper data transfer */
231 tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
232 - SDIO_HEADER_LEN;
233 hlprblknow = 0;
234
235 do {
236 ret = btmrvl_sdio_poll_card_status(card,
237 CARD_IO_READY | DN_LD_CARD_RDY);
238 if (ret < 0) {
239 BT_ERR("Helper download poll status timeout @ %d",
240 hlprblknow);
241 goto done;
242 }
243
244 /* Check if there is more data? */
245 if (hlprblknow >= helperlen)
246 break;
247
248 if (helperlen - hlprblknow < tx_len)
249 tx_len = helperlen - hlprblknow;
250
251 /* Little-endian */
252 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
253 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
254 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
255 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
256
257 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
258 tx_len);
259
260 /* Now send the data */
261 ret = sdio_writesb(card->func, card->ioport, helperbuf,
262 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
263 if (ret < 0) {
264 BT_ERR("IO error during helper download @ %d",
265 hlprblknow);
266 goto done;
267 }
268
269 hlprblknow += tx_len;
270 } while (true);
271
272 BT_DBG("Transferring helper image EOF block");
273
274 memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
275
276 ret = sdio_writesb(card->func, card->ioport, helperbuf,
277 SDIO_BLOCK_SIZE);
278 if (ret < 0) {
279 BT_ERR("IO error in writing helper image EOF block");
280 goto done;
281 }
282
283 ret = 0;
284
285done:
286 kfree(tmphlprbuf);
287 if (fw_helper)
288 release_firmware(fw_helper);
289
290 return ret;
291}
292
293static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
294{
295 const struct firmware *fw_firmware = NULL;
296 const u8 *firmware = NULL;
297 int firmwarelen, tmpfwbufsz, ret;
298 unsigned int tries, offset;
299 u8 base0, base1;
300 void *tmpfwbuf = NULL;
301 u8 *fwbuf;
302 u16 len;
303 int txlen = 0, tx_blocks = 0, count = 0;
304
305 ret = request_firmware(&fw_firmware, card->firmware,
306 &card->func->dev);
307 if ((ret < 0) || !fw_firmware) {
308 BT_ERR("request_firmware(firmware) failed, error code = %d",
309 ret);
310 ret = -ENOENT;
311 goto done;
312 }
313
314 firmware = fw_firmware->data;
315 firmwarelen = fw_firmware->size;
316
317 BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
318
319 tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
320 tmpfwbuf = kmalloc(tmpfwbufsz, GFP_KERNEL);
321 if (!tmpfwbuf) {
322 BT_ERR("Unable to allocate buffer for firmware."
323 " Terminating download");
324 ret = -ENOMEM;
325 goto done;
326 }
327
328 memset(tmpfwbuf, 0, tmpfwbufsz);
329
330 /* Ensure aligned firmware buffer */
331 fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
332
333 /* Perform firmware data transfer */
334 offset = 0;
335 do {
336 ret = btmrvl_sdio_poll_card_status(card,
337 CARD_IO_READY | DN_LD_CARD_RDY);
338 if (ret < 0) {
339 BT_ERR("FW download with helper poll status"
340 " timeout @ %d", offset);
341 goto done;
342 }
343
344 /* Check if there is more data ? */
345 if (offset >= firmwarelen)
346 break;
347
348 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
349 base0 = sdio_readb(card->func,
350 SQ_READ_BASE_ADDRESS_A0_REG, &ret);
351 if (ret) {
352 BT_ERR("BASE0 register read failed:"
353 " base0 = 0x%04X(%d)."
354 " Terminating download",
355 base0, base0);
356 ret = -EIO;
357 goto done;
358 }
359 base1 = sdio_readb(card->func,
360 SQ_READ_BASE_ADDRESS_A1_REG, &ret);
361 if (ret) {
362 BT_ERR("BASE1 register read failed:"
363 " base1 = 0x%04X(%d)."
364 " Terminating download",
365 base1, base1);
366 ret = -EIO;
367 goto done;
368 }
369
370 len = (((u16) base1) << 8) | base0;
371 if (len)
372 break;
373
374 udelay(10);
375 }
376
377 if (!len)
378 break;
379 else if (len > BTM_UPLD_SIZE) {
380 BT_ERR("FW download failure @%d, invalid length %d",
381 offset, len);
382 ret = -EINVAL;
383 goto done;
384 }
385
386 txlen = len;
387
388 if (len & BIT(0)) {
389 count++;
390 if (count > MAX_WRITE_IOMEM_RETRY) {
391 BT_ERR("FW download failure @%d, "
392 "over max retry count", offset);
393 ret = -EIO;
394 goto done;
395 }
396 BT_ERR("FW CRC error indicated by the helper: "
397 "len = 0x%04X, txlen = %d", len, txlen);
398 len &= ~BIT(0);
399 /* Set txlen to 0 so as to resend from same offset */
400 txlen = 0;
401 } else {
402 count = 0;
403
404 /* Last block ? */
405 if (firmwarelen - offset < txlen)
406 txlen = firmwarelen - offset;
407
408 tx_blocks =
409 (txlen + SDIO_BLOCK_SIZE - 1) / SDIO_BLOCK_SIZE;
410
411 memcpy(fwbuf, &firmware[offset], txlen);
412 }
413
414 ret = sdio_writesb(card->func, card->ioport, fwbuf,
415 tx_blocks * SDIO_BLOCK_SIZE);
416
417 if (ret < 0) {
418 BT_ERR("FW download, writesb(%d) failed @%d",
419 count, offset);
420 sdio_writeb(card->func, HOST_CMD53_FIN, CONFIG_REG,
421 &ret);
422 if (ret)
423 BT_ERR("writeb failed (CFG)");
424 }
425
426 offset += txlen;
427 } while (true);
428
429 BT_DBG("FW download over, size %d bytes", offset);
430
431 ret = 0;
432
433done:
434 kfree(tmpfwbuf);
435
436 if (fw_firmware)
437 release_firmware(fw_firmware);
438
439 return ret;
440}
441
442static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
443{
444 u16 buf_len = 0;
445 int ret, buf_block_len, blksz;
446 struct sk_buff *skb = NULL;
447 u32 type;
448 u8 *payload = NULL;
449 struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
450 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
451
452 if (!card || !card->func) {
453 BT_ERR("card or function is NULL!");
454 ret = -EINVAL;
455 goto exit;
456 }
457
458 /* Read the length of data to be transferred */
459 ret = btmrvl_sdio_read_rx_len(card, &buf_len);
460 if (ret < 0) {
461 BT_ERR("read rx_len failed");
462 ret = -EIO;
463 goto exit;
464 }
465
466 blksz = SDIO_BLOCK_SIZE;
467 buf_block_len = (buf_len + blksz - 1) / blksz;
468
469 if (buf_len <= SDIO_HEADER_LEN
470 || (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
471 BT_ERR("invalid packet length: %d", buf_len);
472 ret = -EINVAL;
473 goto exit;
474 }
475
476 /* Allocate buffer */
477 skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
478 GFP_ATOMIC);
479 if (skb == NULL) {
480 BT_ERR("No free skb");
481 goto exit;
482 }
483
484 if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
485 skb_put(skb, (unsigned long) skb->data &
486 (BTSDIO_DMA_ALIGN - 1));
487 skb_pull(skb, (unsigned long) skb->data &
488 (BTSDIO_DMA_ALIGN - 1));
489 }
490
491 payload = skb->data;
492
493 ret = sdio_readsb(card->func, payload, card->ioport,
494 buf_block_len * blksz);
495 if (ret < 0) {
496 BT_ERR("readsb failed: %d", ret);
497 ret = -EIO;
498 goto exit;
499 }
500
501 /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
502 * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
503 */
504
505 buf_len = payload[0];
506 buf_len |= (u16) payload[1] << 8;
507 type = payload[3];
508
509 switch (type) {
510 case HCI_ACLDATA_PKT:
511 case HCI_SCODATA_PKT:
512 case HCI_EVENT_PKT:
513 bt_cb(skb)->pkt_type = type;
514 skb->dev = (void *)hdev;
515 skb_put(skb, buf_len);
516 skb_pull(skb, SDIO_HEADER_LEN);
517
518 if (type == HCI_EVENT_PKT)
519 btmrvl_check_evtpkt(priv, skb);
520
521 hci_recv_frame(skb);
522 hdev->stat.byte_rx += buf_len;
523 break;
524
525 case MRVL_VENDOR_PKT:
526 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
527 skb->dev = (void *)hdev;
528 skb_put(skb, buf_len);
529 skb_pull(skb, SDIO_HEADER_LEN);
530
531 if (btmrvl_process_event(priv, skb))
532 hci_recv_frame(skb);
533
534 hdev->stat.byte_rx += buf_len;
535 break;
536
537 default:
538 BT_ERR("Unknow packet type:%d", type);
539 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
540 blksz * buf_block_len);
541
542 kfree_skb(skb);
543 skb = NULL;
544 break;
545 }
546
547exit:
548 if (ret) {
549 hdev->stat.err_rx++;
550 if (skb)
551 kfree_skb(skb);
552 }
553
554 return ret;
555}
556
557static int btmrvl_sdio_get_int_status(struct btmrvl_private *priv, u8 * ireg)
558{
559 int ret;
560 u8 sdio_ireg = 0;
561 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
562
563 *ireg = 0;
564
565 sdio_ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret);
566 if (ret) {
567 BT_ERR("sdio_readb: read int status register failed");
568 ret = -EIO;
569 goto done;
570 }
571
572 if (sdio_ireg != 0) {
573 /*
574 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
575 * Clear the interrupt status register and re-enable the
576 * interrupt.
577 */
578 BT_DBG("sdio_ireg = 0x%x", sdio_ireg);
579
580 sdio_writeb(card->func, ~(sdio_ireg) & (DN_LD_HOST_INT_STATUS |
581 UP_LD_HOST_INT_STATUS),
582 HOST_INTSTATUS_REG, &ret);
583 if (ret) {
584 BT_ERR("sdio_writeb: clear int status register "
585 "failed");
586 ret = -EIO;
587 goto done;
588 }
589 }
590
591 if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
592 if (priv->btmrvl_dev.tx_dnld_rdy)
593 BT_DBG("tx_done already received: "
594 " int_status=0x%x", sdio_ireg);
595 else
596 priv->btmrvl_dev.tx_dnld_rdy = true;
597 }
598
599 if (sdio_ireg & UP_LD_HOST_INT_STATUS)
600 btmrvl_sdio_card_to_host(priv);
601
602 *ireg = sdio_ireg;
603
604 ret = 0;
605
606done:
607 return ret;
608}
609
610static void btmrvl_sdio_interrupt(struct sdio_func *func)
611{
612 struct btmrvl_private *priv;
613 struct hci_dev *hcidev;
614 struct btmrvl_sdio_card *card;
615 u8 ireg = 0;
616
617 card = sdio_get_drvdata(func);
618 if (card && card->priv) {
619 priv = card->priv;
620 hcidev = priv->btmrvl_dev.hcidev;
621
622 if (btmrvl_sdio_get_int_status(priv, &ireg))
623 BT_ERR("reading HOST_INT_STATUS_REG failed");
624 else
625 BT_DBG("HOST_INT_STATUS_REG %#x", ireg);
626
627 btmrvl_interrupt(priv);
628 }
629}
630
631static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
632{
633 struct sdio_func *func;
634 u8 reg;
635 int ret = 0;
636
637 if (!card || !card->func) {
638 BT_ERR("Error: card or function is NULL!");
639 ret = -EINVAL;
640 goto failed;
641 }
642
643 func = card->func;
644
645 sdio_claim_host(func);
646
647 ret = sdio_enable_func(func);
648 if (ret) {
649 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
650 ret = -EIO;
651 goto release_host;
652 }
653
654 ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
655 if (ret) {
656 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
657 ret = -EIO;
658 goto disable_func;
659 }
660
661 ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
662 if (ret) {
663 BT_ERR("cannot set SDIO block size");
664 ret = -EIO;
665 goto release_irq;
666 }
667
668 reg = sdio_readb(func, IO_PORT_0_REG, &ret);
669 if (ret < 0) {
670 ret = -EIO;
671 goto release_irq;
672 }
673
674 card->ioport = reg;
675
676 reg = sdio_readb(func, IO_PORT_1_REG, &ret);
677 if (ret < 0) {
678 ret = -EIO;
679 goto release_irq;
680 }
681
682 card->ioport |= (reg << 8);
683
684 reg = sdio_readb(func, IO_PORT_2_REG, &ret);
685 if (ret < 0) {
686 ret = -EIO;
687 goto release_irq;
688 }
689
690 card->ioport |= (reg << 16);
691
692 BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
693
694 sdio_set_drvdata(func, card);
695
696 sdio_release_host(func);
697
698 return 0;
699
700release_irq:
701 sdio_release_irq(func);
702
703disable_func:
704 sdio_disable_func(func);
705
706release_host:
707 sdio_release_host(func);
708
709failed:
710 return ret;
711}
712
713static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
714{
715 if (card && card->func) {
716 sdio_claim_host(card->func);
717 sdio_release_irq(card->func);
718 sdio_disable_func(card->func);
719 sdio_release_host(card->func);
720 sdio_set_drvdata(card->func, NULL);
721 }
722
723 return 0;
724}
725
726static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
727{
728 int ret;
729
730 if (!card || !card->func)
731 return -EINVAL;
732
733 sdio_claim_host(card->func);
734
735 ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
736
737 btmrvl_sdio_get_rx_unit(card);
738
739 sdio_release_host(card->func);
740
741 return ret;
742}
743
744static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
745{
746 int ret;
747
748 if (!card || !card->func)
749 return -EINVAL;
750
751 sdio_claim_host(card->func);
752
753 ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
754
755 sdio_release_host(card->func);
756
757 return ret;
758}
759
760static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
761 u8 *payload, u16 nb)
762{
763 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
764 int ret = 0;
765 int buf_block_len;
766 int blksz;
767 int i = 0;
768 u8 *buf = NULL;
769 void *tmpbuf = NULL;
770 int tmpbufsz;
771
772 if (!card || !card->func) {
773 BT_ERR("card or function is NULL!");
774 return -EINVAL;
775 }
776
777 buf = payload;
778 if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
779 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
780 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
781 if (!tmpbuf)
782 return -ENOMEM;
783 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
784 memcpy(buf, payload, nb);
785 }
786
787 blksz = SDIO_BLOCK_SIZE;
788 buf_block_len = (nb + blksz - 1) / blksz;
789
790 sdio_claim_host(card->func);
791
792 do {
793 /* Transfer data to card */
794 ret = sdio_writesb(card->func, card->ioport, buf,
795 buf_block_len * blksz);
796 if (ret < 0) {
797 i++;
798 BT_ERR("i=%d writesb failed: %d", i, ret);
799 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
800 payload, nb);
801 ret = -EIO;
802 if (i > MAX_WRITE_IOMEM_RETRY)
803 goto exit;
804 }
805 } while (ret);
806
807 priv->btmrvl_dev.tx_dnld_rdy = false;
808
809exit:
810 sdio_release_host(card->func);
811
812 return ret;
813}
814
815static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
816{
817 int ret = 0;
818
819 if (!card || !card->func) {
820 BT_ERR("card or function is NULL!");
821 return -EINVAL;
822 }
823 sdio_claim_host(card->func);
824
825 if (!btmrvl_sdio_verify_fw_download(card, 1)) {
826 BT_DBG("Firmware already downloaded!");
827 goto done;
828 }
829
830 ret = btmrvl_sdio_download_helper(card);
831 if (ret) {
832 BT_ERR("Failed to download helper!");
833 ret = -EIO;
834 goto done;
835 }
836
837 if (btmrvl_sdio_download_fw_w_helper(card)) {
838 BT_ERR("Failed to download firmware!");
839 ret = -EIO;
840 goto done;
841 }
842
843 if (btmrvl_sdio_verify_fw_download(card, MAX_POLL_TRIES)) {
844 BT_ERR("FW failed to be active in time!");
845 ret = -ETIMEDOUT;
846 goto done;
847 }
848
849done:
850 sdio_release_host(card->func);
851
852 return ret;
853}
854
855static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
856{
857 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
858 int ret = 0;
859
860 if (!card || !card->func) {
861 BT_ERR("card or function is NULL!");
862 return -EINVAL;
863 }
864
865 sdio_claim_host(card->func);
866
867 sdio_writeb(card->func, HOST_POWER_UP, CONFIG_REG, &ret);
868
869 sdio_release_host(card->func);
870
871 BT_DBG("wake up firmware");
872
873 return ret;
874}
875
876static int btmrvl_sdio_probe(struct sdio_func *func,
877 const struct sdio_device_id *id)
878{
879 int ret = 0;
880 struct btmrvl_private *priv = NULL;
881 struct btmrvl_sdio_card *card = NULL;
882
883 BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
884 id->vendor, id->device, id->class, func->num);
885
886 card = kzalloc(sizeof(*card), GFP_KERNEL);
887 if (!card) {
888 ret = -ENOMEM;
889 goto done;
890 }
891
892 card->func = func;
893
894 if (id->driver_data) {
895 struct btmrvl_sdio_device *data = (void *) id->driver_data;
896 card->helper = data->helper;
897 card->firmware = data->firmware;
898 }
899
900 if (btmrvl_sdio_register_dev(card) < 0) {
901 BT_ERR("Failed to register BT device!");
902 ret = -ENODEV;
903 goto free_card;
904 }
905
906 /* Disable the interrupts on the card */
907 btmrvl_sdio_disable_host_int(card);
908
909 if (btmrvl_sdio_download_fw(card)) {
910 BT_ERR("Downloading firmware failed!");
911 ret = -ENODEV;
912 goto unreg_dev;
913 }
914
915 msleep(100);
916
917 btmrvl_sdio_enable_host_int(card);
918
919 priv = btmrvl_add_card(card);
920 if (!priv) {
921 BT_ERR("Initializing card failed!");
922 ret = -ENODEV;
923 goto disable_host_int;
924 }
925
926 card->priv = priv;
927
928 /* Initialize the interface specific function pointers */
929 priv->hw_host_to_card = btmrvl_sdio_host_to_card;
930 priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
931
932 btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
933
934 return 0;
935
936disable_host_int:
937 btmrvl_sdio_disable_host_int(card);
938unreg_dev:
939 btmrvl_sdio_unregister_dev(card);
940free_card:
941 kfree(card);
942done:
943 return ret;
944}
945
946static void btmrvl_sdio_remove(struct sdio_func *func)
947{
948 struct btmrvl_sdio_card *card;
949
950 if (func) {
951 card = sdio_get_drvdata(func);
952 if (card) {
953 /* Send SHUTDOWN command & disable interrupt
954 * if user removes the module.
955 */
956 if (user_rmmod) {
957 btmrvl_send_module_cfg_cmd(card->priv,
958 MODULE_SHUTDOWN_REQ);
959 btmrvl_sdio_disable_host_int(card);
960 }
961 BT_DBG("unregester dev");
962 btmrvl_sdio_unregister_dev(card);
963 btmrvl_remove_card(card->priv);
964 kfree(card);
965 }
966 }
967}
968
969static struct sdio_driver bt_mrvl_sdio = {
970 .name = "btmrvl_sdio",
971 .id_table = btmrvl_sdio_ids,
972 .probe = btmrvl_sdio_probe,
973 .remove = btmrvl_sdio_remove,
974};
975
976static int btmrvl_sdio_init_module(void)
977{
978 if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
979 BT_ERR("SDIO Driver Registration Failed");
980 return -ENODEV;
981 }
982
983 /* Clear the flag in case user removes the card. */
984 user_rmmod = 0;
985
986 return 0;
987}
988
989static void btmrvl_sdio_exit_module(void)
990{
991 /* Set the flag as user is removing this module. */
992 user_rmmod = 1;
993
994 sdio_unregister_driver(&bt_mrvl_sdio);
995}
996
997module_init(btmrvl_sdio_init_module);
998module_exit(btmrvl_sdio_exit_module);
999
1000MODULE_AUTHOR("Marvell International Ltd.");
1001MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1002MODULE_VERSION(VERSION);
1003MODULE_LICENSE("GPL v2");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 22:29:07 -0500