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Merge tag 'omap-for-v3.13/fixes-for-merge-window-take2' of git://git.kernel.org/pub...
[linux-2.6.git] / drivers / bluetooth / btmrvl_sdio.c
blob00da6df9f71edfcd6f92acbe70129af5ec62e0bf
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 #include <linux/slab.h>
23
24 #include <linux/mmc/sdio_ids.h>
25 #include <linux/mmc/sdio_func.h>
26 #include <linux/module.h>
27
28 #include <net/bluetooth/bluetooth.h>
29 #include <net/bluetooth/hci_core.h>
30
31 #include "btmrvl_drv.h"
32 #include "btmrvl_sdio.h"
33
34 #define VERSION "1.0"
35
36 /* The btmrvl_sdio_remove() callback function is called
37 * when user removes this module from kernel space or ejects
38 * the card from the slot. The driver handles these 2 cases
39 * differently.
40 * If the user is removing the module, a MODULE_SHUTDOWN_REQ
41 * command is sent to firmware and interrupt will be disabled.
42 * If the card is removed, there is no need to send command
43 * or disable interrupt.
44 *
45 * The variable 'user_rmmod' is used to distinguish these two
46 * scenarios. This flag is initialized as FALSE in case the card
47 * is removed, and will be set to TRUE for module removal when
48 * module_exit function is called.
49 */
50 static u8 user_rmmod;
51 static u8 sdio_ireg;
52
53 static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = {
54 .cfg = 0x03,
55 .host_int_mask = 0x04,
56 .host_intstatus = 0x05,
57 .card_status = 0x20,
58 .sq_read_base_addr_a0 = 0x10,
59 .sq_read_base_addr_a1 = 0x11,
60 .card_fw_status0 = 0x40,
61 .card_fw_status1 = 0x41,
62 .card_rx_len = 0x42,
63 .card_rx_unit = 0x43,
64 .io_port_0 = 0x00,
65 .io_port_1 = 0x01,
66 .io_port_2 = 0x02,
67 };
68 static const struct btmrvl_sdio_card_reg btmrvl_reg_87xx = {
69 .cfg = 0x00,
70 .host_int_mask = 0x02,
71 .host_intstatus = 0x03,
72 .card_status = 0x30,
73 .sq_read_base_addr_a0 = 0x40,
74 .sq_read_base_addr_a1 = 0x41,
75 .card_revision = 0x5c,
76 .card_fw_status0 = 0x60,
77 .card_fw_status1 = 0x61,
78 .card_rx_len = 0x62,
79 .card_rx_unit = 0x63,
80 .io_port_0 = 0x78,
81 .io_port_1 = 0x79,
82 .io_port_2 = 0x7a,
83 };
84
85 static const struct btmrvl_sdio_card_reg btmrvl_reg_88xx = {
86 .cfg = 0x00,
87 .host_int_mask = 0x02,
88 .host_intstatus = 0x03,
89 .card_status = 0x50,
90 .sq_read_base_addr_a0 = 0x60,
91 .sq_read_base_addr_a1 = 0x61,
92 .card_revision = 0xbc,
93 .card_fw_status0 = 0xc0,
94 .card_fw_status1 = 0xc1,
95 .card_rx_len = 0xc2,
96 .card_rx_unit = 0xc3,
97 .io_port_0 = 0xd8,
98 .io_port_1 = 0xd9,
99 .io_port_2 = 0xda,
100 };
101
102 static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
103 .helper = "mrvl/sd8688_helper.bin",
104 .firmware = "mrvl/sd8688.bin",
105 .reg = &btmrvl_reg_8688,
106 .sd_blksz_fw_dl = 64,
107 };
108
109 static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
110 .helper = NULL,
111 .firmware = "mrvl/sd8787_uapsta.bin",
112 .reg = &btmrvl_reg_87xx,
113 .sd_blksz_fw_dl = 256,
114 };
115
116 static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
117 .helper = NULL,
118 .firmware = "mrvl/sd8797_uapsta.bin",
119 .reg = &btmrvl_reg_87xx,
120 .sd_blksz_fw_dl = 256,
121 };
122
123 static const struct btmrvl_sdio_device btmrvl_sdio_sd8897 = {
124 .helper = NULL,
125 .firmware = "mrvl/sd8897_uapsta.bin",
126 .reg = &btmrvl_reg_88xx,
127 .sd_blksz_fw_dl = 256,
128 };
129
130 static const struct sdio_device_id btmrvl_sdio_ids[] = {
131 /* Marvell SD8688 Bluetooth device */
132 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
133 .driver_data = (unsigned long) &btmrvl_sdio_sd8688 },
134 /* Marvell SD8787 Bluetooth device */
135 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
136 .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
137 /* Marvell SD8787 Bluetooth AMP device */
138 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911B),
139 .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
140 /* Marvell SD8797 Bluetooth device */
141 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A),
142 .driver_data = (unsigned long) &btmrvl_sdio_sd8797 },
143 /* Marvell SD8897 Bluetooth device */
144 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912E),
145 .driver_data = (unsigned long) &btmrvl_sdio_sd8897 },
146
147 { } /* Terminating entry */
148 };
149
150 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
151
152 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
153 {
154 u8 reg;
155 int ret;
156
157 reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
158 if (!ret)
159 card->rx_unit = reg;
160
161 return ret;
162 }
163
164 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
165 {
166 u8 fws0, fws1;
167 int ret;
168
169 *dat = 0;
170
171 fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
172 if (ret)
173 return -EIO;
174
175 fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
176 if (ret)
177 return -EIO;
178
179 *dat = (((u16) fws1) << 8) | fws0;
180
181 return 0;
182 }
183
184 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
185 {
186 u8 reg;
187 int ret;
188
189 reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
190 if (!ret)
191 *dat = (u16) reg << card->rx_unit;
192
193 return ret;
194 }
195
196 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
197 u8 mask)
198 {
199 int ret;
200
201 sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
202 if (ret) {
203 BT_ERR("Unable to enable the host interrupt!");
204 ret = -EIO;
205 }
206
207 return ret;
208 }
209
210 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
211 u8 mask)
212 {
213 u8 host_int_mask;
214 int ret;
215
216 host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
217 if (ret)
218 return -EIO;
219
220 host_int_mask &= ~mask;
221
222 sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
223 if (ret < 0) {
224 BT_ERR("Unable to disable the host interrupt!");
225 return -EIO;
226 }
227
228 return 0;
229 }
230
231 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
232 {
233 unsigned int tries;
234 u8 status;
235 int ret;
236
237 for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
238 status = sdio_readb(card->func, card->reg->card_status, &ret);
239 if (ret)
240 goto failed;
241 if ((status & bits) == bits)
242 return ret;
243
244 udelay(1);
245 }
246
247 ret = -ETIMEDOUT;
248
249 failed:
250 BT_ERR("FAILED! ret=%d", ret);
251
252 return ret;
253 }
254
255 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
256 int pollnum)
257 {
258 u16 firmwarestat;
259 int tries, ret;
260
261 /* Wait for firmware to become ready */
262 for (tries = 0; tries < pollnum; tries++) {
263 sdio_claim_host(card->func);
264 ret = btmrvl_sdio_read_fw_status(card, &firmwarestat);
265 sdio_release_host(card->func);
266 if (ret < 0)
267 continue;
268
269 if (firmwarestat == FIRMWARE_READY)
270 return 0;
271
272 msleep(10);
273 }
274
275 return -ETIMEDOUT;
276 }
277
278 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
279 {
280 const struct firmware *fw_helper = NULL;
281 const u8 *helper = NULL;
282 int ret;
283 void *tmphlprbuf = NULL;
284 int tmphlprbufsz, hlprblknow, helperlen;
285 u8 *helperbuf;
286 u32 tx_len;
287
288 ret = request_firmware(&fw_helper, card->helper,
289 &card->func->dev);
290 if ((ret < 0) || !fw_helper) {
291 BT_ERR("request_firmware(helper) failed, error code = %d",
292 ret);
293 ret = -ENOENT;
294 goto done;
295 }
296
297 helper = fw_helper->data;
298 helperlen = fw_helper->size;
299
300 BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
301 helperlen, SDIO_BLOCK_SIZE);
302
303 tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
304
305 tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
306 if (!tmphlprbuf) {
307 BT_ERR("Unable to allocate buffer for helper."
308 " Terminating download");
309 ret = -ENOMEM;
310 goto done;
311 }
312
313 helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
314
315 /* Perform helper data transfer */
316 tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
317 - SDIO_HEADER_LEN;
318 hlprblknow = 0;
319
320 do {
321 ret = btmrvl_sdio_poll_card_status(card,
322 CARD_IO_READY | DN_LD_CARD_RDY);
323 if (ret < 0) {
324 BT_ERR("Helper download poll status timeout @ %d",
325 hlprblknow);
326 goto done;
327 }
328
329 /* Check if there is more data? */
330 if (hlprblknow >= helperlen)
331 break;
332
333 if (helperlen - hlprblknow < tx_len)
334 tx_len = helperlen - hlprblknow;
335
336 /* Little-endian */
337 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
338 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
339 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
340 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
341
342 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
343 tx_len);
344
345 /* Now send the data */
346 ret = sdio_writesb(card->func, card->ioport, helperbuf,
347 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
348 if (ret < 0) {
349 BT_ERR("IO error during helper download @ %d",
350 hlprblknow);
351 goto done;
352 }
353
354 hlprblknow += tx_len;
355 } while (true);
356
357 BT_DBG("Transferring helper image EOF block");
358
359 memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
360
361 ret = sdio_writesb(card->func, card->ioport, helperbuf,
362 SDIO_BLOCK_SIZE);
363 if (ret < 0) {
364 BT_ERR("IO error in writing helper image EOF block");
365 goto done;
366 }
367
368 ret = 0;
369
370 done:
371 kfree(tmphlprbuf);
372 release_firmware(fw_helper);
373 return ret;
374 }
375
376 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
377 {
378 const struct firmware *fw_firmware = NULL;
379 const u8 *firmware = NULL;
380 int firmwarelen, tmpfwbufsz, ret;
381 unsigned int tries, offset;
382 u8 base0, base1;
383 void *tmpfwbuf = NULL;
384 u8 *fwbuf;
385 u16 len, blksz_dl = card->sd_blksz_fw_dl;
386 int txlen = 0, tx_blocks = 0, count = 0;
387
388 ret = request_firmware(&fw_firmware, card->firmware,
389 &card->func->dev);
390 if ((ret < 0) || !fw_firmware) {
391 BT_ERR("request_firmware(firmware) failed, error code = %d",
392 ret);
393 ret = -ENOENT;
394 goto done;
395 }
396
397 firmware = fw_firmware->data;
398 firmwarelen = fw_firmware->size;
399
400 BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
401
402 tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
403 tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
404 if (!tmpfwbuf) {
405 BT_ERR("Unable to allocate buffer for firmware."
406 " Terminating download");
407 ret = -ENOMEM;
408 goto done;
409 }
410
411 /* Ensure aligned firmware buffer */
412 fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
413
414 /* Perform firmware data transfer */
415 offset = 0;
416 do {
417 ret = btmrvl_sdio_poll_card_status(card,
418 CARD_IO_READY | DN_LD_CARD_RDY);
419 if (ret < 0) {
420 BT_ERR("FW download with helper poll status"
421 " timeout @ %d", offset);
422 goto done;
423 }
424
425 /* Check if there is more data ? */
426 if (offset >= firmwarelen)
427 break;
428
429 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
430 base0 = sdio_readb(card->func,
431 card->reg->sq_read_base_addr_a0, &ret);
432 if (ret) {
433 BT_ERR("BASE0 register read failed:"
434 " base0 = 0x%04X(%d)."
435 " Terminating download",
436 base0, base0);
437 ret = -EIO;
438 goto done;
439 }
440 base1 = sdio_readb(card->func,
441 card->reg->sq_read_base_addr_a1, &ret);
442 if (ret) {
443 BT_ERR("BASE1 register read failed:"
444 " base1 = 0x%04X(%d)."
445 " Terminating download",
446 base1, base1);
447 ret = -EIO;
448 goto done;
449 }
450
451 len = (((u16) base1) << 8) | base0;
452 if (len)
453 break;
454
455 udelay(10);
456 }
457
458 if (!len)
459 break;
460 else if (len > BTM_UPLD_SIZE) {
461 BT_ERR("FW download failure @%d, invalid length %d",
462 offset, len);
463 ret = -EINVAL;
464 goto done;
465 }
466
467 txlen = len;
468
469 if (len & BIT(0)) {
470 count++;
471 if (count > MAX_WRITE_IOMEM_RETRY) {
472 BT_ERR("FW download failure @%d, "
473 "over max retry count", offset);
474 ret = -EIO;
475 goto done;
476 }
477 BT_ERR("FW CRC error indicated by the helper: "
478 "len = 0x%04X, txlen = %d", len, txlen);
479 len &= ~BIT(0);
480 /* Set txlen to 0 so as to resend from same offset */
481 txlen = 0;
482 } else {
483 count = 0;
484
485 /* Last block ? */
486 if (firmwarelen - offset < txlen)
487 txlen = firmwarelen - offset;
488
489 tx_blocks = DIV_ROUND_UP(txlen, blksz_dl);
490
491 memcpy(fwbuf, &firmware[offset], txlen);
492 }
493
494 ret = sdio_writesb(card->func, card->ioport, fwbuf,
495 tx_blocks * blksz_dl);
496
497 if (ret < 0) {
498 BT_ERR("FW download, writesb(%d) failed @%d",
499 count, offset);
500 sdio_writeb(card->func, HOST_CMD53_FIN,
501 card->reg->cfg, &ret);
502 if (ret)
503 BT_ERR("writeb failed (CFG)");
504 }
505
506 offset += txlen;
507 } while (true);
508
509 BT_DBG("FW download over, size %d bytes", offset);
510
511 ret = 0;
512
513 done:
514 kfree(tmpfwbuf);
515 release_firmware(fw_firmware);
516 return ret;
517 }
518
519 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
520 {
521 u16 buf_len = 0;
522 int ret, num_blocks, blksz;
523 struct sk_buff *skb = NULL;
524 u32 type;
525 u8 *payload = NULL;
526 struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
527 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
528
529 if (!card || !card->func) {
530 BT_ERR("card or function is NULL!");
531 ret = -EINVAL;
532 goto exit;
533 }
534
535 /* Read the length of data to be transferred */
536 ret = btmrvl_sdio_read_rx_len(card, &buf_len);
537 if (ret < 0) {
538 BT_ERR("read rx_len failed");
539 ret = -EIO;
540 goto exit;
541 }
542
543 blksz = SDIO_BLOCK_SIZE;
544 num_blocks = DIV_ROUND_UP(buf_len, blksz);
545
546 if (buf_len <= SDIO_HEADER_LEN
547 || (num_blocks * blksz) > ALLOC_BUF_SIZE) {
548 BT_ERR("invalid packet length: %d", buf_len);
549 ret = -EINVAL;
550 goto exit;
551 }
552
553 /* Allocate buffer */
554 skb = bt_skb_alloc(num_blocks * blksz + BTSDIO_DMA_ALIGN, GFP_ATOMIC);
555 if (skb == NULL) {
556 BT_ERR("No free skb");
557 ret = -ENOMEM;
558 goto exit;
559 }
560
561 if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
562 skb_put(skb, (unsigned long) skb->data &
563 (BTSDIO_DMA_ALIGN - 1));
564 skb_pull(skb, (unsigned long) skb->data &
565 (BTSDIO_DMA_ALIGN - 1));
566 }
567
568 payload = skb->data;
569
570 ret = sdio_readsb(card->func, payload, card->ioport,
571 num_blocks * blksz);
572 if (ret < 0) {
573 BT_ERR("readsb failed: %d", ret);
574 ret = -EIO;
575 goto exit;
576 }
577
578 /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
579 * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
580 */
581
582 buf_len = payload[0];
583 buf_len |= payload[1] << 8;
584 buf_len |= payload[2] << 16;
585
586 if (buf_len > blksz * num_blocks) {
587 BT_ERR("Skip incorrect packet: hdrlen %d buffer %d",
588 buf_len, blksz * num_blocks);
589 ret = -EIO;
590 goto exit;
591 }
592
593 type = payload[3];
594
595 switch (type) {
596 case HCI_ACLDATA_PKT:
597 case HCI_SCODATA_PKT:
598 case HCI_EVENT_PKT:
599 bt_cb(skb)->pkt_type = type;
600 skb->dev = (void *)hdev;
601 skb_put(skb, buf_len);
602 skb_pull(skb, SDIO_HEADER_LEN);
603
604 if (type == HCI_EVENT_PKT) {
605 if (btmrvl_check_evtpkt(priv, skb))
606 hci_recv_frame(skb);
607 } else {
608 hci_recv_frame(skb);
609 }
610
611 hdev->stat.byte_rx += buf_len;
612 break;
613
614 case MRVL_VENDOR_PKT:
615 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
616 skb->dev = (void *)hdev;
617 skb_put(skb, buf_len);
618 skb_pull(skb, SDIO_HEADER_LEN);
619
620 if (btmrvl_process_event(priv, skb))
621 hci_recv_frame(skb);
622
623 hdev->stat.byte_rx += buf_len;
624 break;
625
626 default:
627 BT_ERR("Unknown packet type:%d", type);
628 BT_ERR("hex: %*ph", blksz * num_blocks, payload);
629
630 kfree_skb(skb);
631 skb = NULL;
632 break;
633 }
634
635 exit:
636 if (ret) {
637 hdev->stat.err_rx++;
638 kfree_skb(skb);
639 }
640
641 return ret;
642 }
643
644 static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
645 {
646 ulong flags;
647 u8 ireg;
648 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
649
650 spin_lock_irqsave(&priv->driver_lock, flags);
651 ireg = sdio_ireg;
652 sdio_ireg = 0;
653 spin_unlock_irqrestore(&priv->driver_lock, flags);
654
655 sdio_claim_host(card->func);
656 if (ireg & DN_LD_HOST_INT_STATUS) {
657 if (priv->btmrvl_dev.tx_dnld_rdy)
658 BT_DBG("tx_done already received: "
659 " int_status=0x%x", ireg);
660 else
661 priv->btmrvl_dev.tx_dnld_rdy = true;
662 }
663
664 if (ireg & UP_LD_HOST_INT_STATUS)
665 btmrvl_sdio_card_to_host(priv);
666
667 sdio_release_host(card->func);
668
669 return 0;
670 }
671
672 static void btmrvl_sdio_interrupt(struct sdio_func *func)
673 {
674 struct btmrvl_private *priv;
675 struct btmrvl_sdio_card *card;
676 ulong flags;
677 u8 ireg = 0;
678 int ret;
679
680 card = sdio_get_drvdata(func);
681 if (!card || !card->priv) {
682 BT_ERR("sbi_interrupt(%p) card or priv is "
683 "NULL, card=%p\n", func, card);
684 return;
685 }
686
687 priv = card->priv;
688
689 ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
690 if (ret) {
691 BT_ERR("sdio_readb: read int status register failed");
692 return;
693 }
694
695 if (ireg != 0) {
696 /*
697 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
698 * Clear the interrupt status register and re-enable the
699 * interrupt.
700 */
701 BT_DBG("ireg = 0x%x", ireg);
702
703 sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
704 UP_LD_HOST_INT_STATUS),
705 card->reg->host_intstatus, &ret);
706 if (ret) {
707 BT_ERR("sdio_writeb: clear int status register failed");
708 return;
709 }
710 }
711
712 spin_lock_irqsave(&priv->driver_lock, flags);
713 sdio_ireg |= ireg;
714 spin_unlock_irqrestore(&priv->driver_lock, flags);
715
716 btmrvl_interrupt(priv);
717 }
718
719 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
720 {
721 struct sdio_func *func;
722 u8 reg;
723 int ret = 0;
724
725 if (!card || !card->func) {
726 BT_ERR("Error: card or function is NULL!");
727 ret = -EINVAL;
728 goto failed;
729 }
730
731 func = card->func;
732
733 sdio_claim_host(func);
734
735 ret = sdio_enable_func(func);
736 if (ret) {
737 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
738 ret = -EIO;
739 goto release_host;
740 }
741
742 ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
743 if (ret) {
744 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
745 ret = -EIO;
746 goto disable_func;
747 }
748
749 ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
750 if (ret) {
751 BT_ERR("cannot set SDIO block size");
752 ret = -EIO;
753 goto release_irq;
754 }
755
756 reg = sdio_readb(func, card->reg->io_port_0, &ret);
757 if (ret < 0) {
758 ret = -EIO;
759 goto release_irq;
760 }
761
762 card->ioport = reg;
763
764 reg = sdio_readb(func, card->reg->io_port_1, &ret);
765 if (ret < 0) {
766 ret = -EIO;
767 goto release_irq;
768 }
769
770 card->ioport |= (reg << 8);
771
772 reg = sdio_readb(func, card->reg->io_port_2, &ret);
773 if (ret < 0) {
774 ret = -EIO;
775 goto release_irq;
776 }
777
778 card->ioport |= (reg << 16);
779
780 BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
781
782 sdio_set_drvdata(func, card);
783
784 sdio_release_host(func);
785
786 return 0;
787
788 release_irq:
789 sdio_release_irq(func);
790
791 disable_func:
792 sdio_disable_func(func);
793
794 release_host:
795 sdio_release_host(func);
796
797 failed:
798 return ret;
799 }
800
801 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
802 {
803 if (card && card->func) {
804 sdio_claim_host(card->func);
805 sdio_release_irq(card->func);
806 sdio_disable_func(card->func);
807 sdio_release_host(card->func);
808 sdio_set_drvdata(card->func, NULL);
809 }
810
811 return 0;
812 }
813
814 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
815 {
816 int ret;
817
818 if (!card || !card->func)
819 return -EINVAL;
820
821 sdio_claim_host(card->func);
822
823 ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
824
825 btmrvl_sdio_get_rx_unit(card);
826
827 sdio_release_host(card->func);
828
829 return ret;
830 }
831
832 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
833 {
834 int ret;
835
836 if (!card || !card->func)
837 return -EINVAL;
838
839 sdio_claim_host(card->func);
840
841 ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
842
843 sdio_release_host(card->func);
844
845 return ret;
846 }
847
848 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
849 u8 *payload, u16 nb)
850 {
851 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
852 int ret = 0;
853 int buf_block_len;
854 int blksz;
855 int i = 0;
856 u8 *buf = NULL;
857 void *tmpbuf = NULL;
858 int tmpbufsz;
859
860 if (!card || !card->func) {
861 BT_ERR("card or function is NULL!");
862 return -EINVAL;
863 }
864
865 buf = payload;
866 if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
867 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
868 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
869 if (!tmpbuf)
870 return -ENOMEM;
871 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
872 memcpy(buf, payload, nb);
873 }
874
875 blksz = SDIO_BLOCK_SIZE;
876 buf_block_len = DIV_ROUND_UP(nb, blksz);
877
878 sdio_claim_host(card->func);
879
880 do {
881 /* Transfer data to card */
882 ret = sdio_writesb(card->func, card->ioport, buf,
883 buf_block_len * blksz);
884 if (ret < 0) {
885 i++;
886 BT_ERR("i=%d writesb failed: %d", i, ret);
887 BT_ERR("hex: %*ph", nb, payload);
888 ret = -EIO;
889 if (i > MAX_WRITE_IOMEM_RETRY)
890 goto exit;
891 }
892 } while (ret);
893
894 priv->btmrvl_dev.tx_dnld_rdy = false;
895
896 exit:
897 sdio_release_host(card->func);
898 kfree(tmpbuf);
899
900 return ret;
901 }
902
903 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
904 {
905 int ret;
906 u8 fws0;
907 int pollnum = MAX_POLL_TRIES;
908
909 if (!card || !card->func) {
910 BT_ERR("card or function is NULL!");
911 return -EINVAL;
912 }
913
914 if (!btmrvl_sdio_verify_fw_download(card, 1)) {
915 BT_DBG("Firmware already downloaded!");
916 return 0;
917 }
918
919 sdio_claim_host(card->func);
920
921 /* Check if other function driver is downloading the firmware */
922 fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
923 if (ret) {
924 BT_ERR("Failed to read FW downloading status!");
925 ret = -EIO;
926 goto done;
927 }
928 if (fws0) {
929 BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
930
931 /* Give other function more time to download the firmware */
932 pollnum *= 10;
933 } else {
934 if (card->helper) {
935 ret = btmrvl_sdio_download_helper(card);
936 if (ret) {
937 BT_ERR("Failed to download helper!");
938 ret = -EIO;
939 goto done;
940 }
941 }
942
943 if (btmrvl_sdio_download_fw_w_helper(card)) {
944 BT_ERR("Failed to download firmware!");
945 ret = -EIO;
946 goto done;
947 }
948 }
949
950 sdio_release_host(card->func);
951
952 /*
953 * winner or not, with this test the FW synchronizes when the
954 * module can continue its initialization
955 */
956 if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
957 BT_ERR("FW failed to be active in time!");
958 return -ETIMEDOUT;
959 }
960
961 return 0;
962
963 done:
964 sdio_release_host(card->func);
965 return ret;
966 }
967
968 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
969 {
970 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
971 int ret = 0;
972
973 if (!card || !card->func) {
974 BT_ERR("card or function is NULL!");
975 return -EINVAL;
976 }
977
978 sdio_claim_host(card->func);
979
980 sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
981
982 sdio_release_host(card->func);
983
984 BT_DBG("wake up firmware");
985
986 return ret;
987 }
988
989 static int btmrvl_sdio_probe(struct sdio_func *func,
990 const struct sdio_device_id *id)
991 {
992 int ret = 0;
993 struct btmrvl_private *priv = NULL;
994 struct btmrvl_sdio_card *card = NULL;
995
996 BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
997 id->vendor, id->device, id->class, func->num);
998
999 card = devm_kzalloc(&func->dev, sizeof(*card), GFP_KERNEL);
1000 if (!card)
1001 return -ENOMEM;
1002
1003 card->func = func;
1004
1005 if (id->driver_data) {
1006 struct btmrvl_sdio_device *data = (void *) id->driver_data;
1007 card->helper = data->helper;
1008 card->firmware = data->firmware;
1009 card->reg = data->reg;
1010 card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
1011 }
1012
1013 if (btmrvl_sdio_register_dev(card) < 0) {
1014 BT_ERR("Failed to register BT device!");
1015 return -ENODEV;
1016 }
1017
1018 /* Disable the interrupts on the card */
1019 btmrvl_sdio_disable_host_int(card);
1020
1021 if (btmrvl_sdio_download_fw(card)) {
1022 BT_ERR("Downloading firmware failed!");
1023 ret = -ENODEV;
1024 goto unreg_dev;
1025 }
1026
1027 btmrvl_sdio_enable_host_int(card);
1028
1029 priv = btmrvl_add_card(card);
1030 if (!priv) {
1031 BT_ERR("Initializing card failed!");
1032 ret = -ENODEV;
1033 goto disable_host_int;
1034 }
1035
1036 card->priv = priv;
1037
1038 /* Initialize the interface specific function pointers */
1039 priv->hw_host_to_card = btmrvl_sdio_host_to_card;
1040 priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
1041 priv->hw_process_int_status = btmrvl_sdio_process_int_status;
1042
1043 if (btmrvl_register_hdev(priv)) {
1044 BT_ERR("Register hdev failed!");
1045 ret = -ENODEV;
1046 goto disable_host_int;
1047 }
1048
1049 priv->btmrvl_dev.psmode = 1;
1050 btmrvl_enable_ps(priv);
1051
1052 priv->btmrvl_dev.gpio_gap = 0xffff;
1053 btmrvl_send_hscfg_cmd(priv);
1054
1055 return 0;
1056
1057 disable_host_int:
1058 btmrvl_sdio_disable_host_int(card);
1059 unreg_dev:
1060 btmrvl_sdio_unregister_dev(card);
1061 return ret;
1062 }
1063
1064 static void btmrvl_sdio_remove(struct sdio_func *func)
1065 {
1066 struct btmrvl_sdio_card *card;
1067
1068 if (func) {
1069 card = sdio_get_drvdata(func);
1070 if (card) {
1071 /* Send SHUTDOWN command & disable interrupt
1072 * if user removes the module.
1073 */
1074 if (user_rmmod) {
1075 btmrvl_send_module_cfg_cmd(card->priv,
1076 MODULE_SHUTDOWN_REQ);
1077 btmrvl_sdio_disable_host_int(card);
1078 }
1079 BT_DBG("unregester dev");
1080 btmrvl_sdio_unregister_dev(card);
1081 btmrvl_remove_card(card->priv);
1082 }
1083 }
1084 }
1085
1086 static int btmrvl_sdio_suspend(struct device *dev)
1087 {
1088 struct sdio_func *func = dev_to_sdio_func(dev);
1089 struct btmrvl_sdio_card *card;
1090 struct btmrvl_private *priv;
1091 mmc_pm_flag_t pm_flags;
1092 struct hci_dev *hcidev;
1093
1094 if (func) {
1095 pm_flags = sdio_get_host_pm_caps(func);
1096 BT_DBG("%s: suspend: PM flags = 0x%x", sdio_func_id(func),
1097 pm_flags);
1098 if (!(pm_flags & MMC_PM_KEEP_POWER)) {
1099 BT_ERR("%s: cannot remain alive while suspended",
1100 sdio_func_id(func));
1101 return -ENOSYS;
1102 }
1103 card = sdio_get_drvdata(func);
1104 if (!card || !card->priv) {
1105 BT_ERR("card or priv structure is not valid");
1106 return 0;
1107 }
1108 } else {
1109 BT_ERR("sdio_func is not specified");
1110 return 0;
1111 }
1112
1113 priv = card->priv;
1114
1115 if (priv->adapter->hs_state != HS_ACTIVATED) {
1116 if (btmrvl_enable_hs(priv)) {
1117 BT_ERR("HS not actived, suspend failed!");
1118 return -EBUSY;
1119 }
1120 }
1121 hcidev = priv->btmrvl_dev.hcidev;
1122 BT_DBG("%s: SDIO suspend", hcidev->name);
1123 hci_suspend_dev(hcidev);
1124 skb_queue_purge(&priv->adapter->tx_queue);
1125
1126 priv->adapter->is_suspended = true;
1127
1128 /* We will keep the power when hs enabled successfully */
1129 if (priv->adapter->hs_state == HS_ACTIVATED) {
1130 BT_DBG("suspend with MMC_PM_KEEP_POWER");
1131 return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1132 } else {
1133 BT_DBG("suspend without MMC_PM_KEEP_POWER");
1134 return 0;
1135 }
1136 }
1137
1138 static int btmrvl_sdio_resume(struct device *dev)
1139 {
1140 struct sdio_func *func = dev_to_sdio_func(dev);
1141 struct btmrvl_sdio_card *card;
1142 struct btmrvl_private *priv;
1143 mmc_pm_flag_t pm_flags;
1144 struct hci_dev *hcidev;
1145
1146 if (func) {
1147 pm_flags = sdio_get_host_pm_caps(func);
1148 BT_DBG("%s: resume: PM flags = 0x%x", sdio_func_id(func),
1149 pm_flags);
1150 card = sdio_get_drvdata(func);
1151 if (!card || !card->priv) {
1152 BT_ERR("card or priv structure is not valid");
1153 return 0;
1154 }
1155 } else {
1156 BT_ERR("sdio_func is not specified");
1157 return 0;
1158 }
1159 priv = card->priv;
1160
1161 if (!priv->adapter->is_suspended) {
1162 BT_DBG("device already resumed");
1163 return 0;
1164 }
1165
1166 priv->adapter->is_suspended = false;
1167 hcidev = priv->btmrvl_dev.hcidev;
1168 BT_DBG("%s: SDIO resume", hcidev->name);
1169 hci_resume_dev(hcidev);
1170 priv->hw_wakeup_firmware(priv);
1171 priv->adapter->hs_state = HS_DEACTIVATED;
1172 BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name);
1173
1174 return 0;
1175 }
1176
1177 static const struct dev_pm_ops btmrvl_sdio_pm_ops = {
1178 .suspend = btmrvl_sdio_suspend,
1179 .resume = btmrvl_sdio_resume,
1180 };
1181
1182 static struct sdio_driver bt_mrvl_sdio = {
1183 .name = "btmrvl_sdio",
1184 .id_table = btmrvl_sdio_ids,
1185 .probe = btmrvl_sdio_probe,
1186 .remove = btmrvl_sdio_remove,
1187 .drv = {
1188 .owner = THIS_MODULE,
1189 .pm = &btmrvl_sdio_pm_ops,
1190 }
1191 };
1192
1193 static int __init btmrvl_sdio_init_module(void)
1194 {
1195 if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1196 BT_ERR("SDIO Driver Registration Failed");
1197 return -ENODEV;
1198 }
1199
1200 /* Clear the flag in case user removes the card. */
1201 user_rmmod = 0;
1202
1203 return 0;
1204 }
1205
1206 static void __exit btmrvl_sdio_exit_module(void)
1207 {
1208 /* Set the flag as user is removing this module. */
1209 user_rmmod = 1;
1210
1211 sdio_unregister_driver(&bt_mrvl_sdio);
1212 }
1213
1214 module_init(btmrvl_sdio_init_module);
1215 module_exit(btmrvl_sdio_exit_module);
1216
1217 MODULE_AUTHOR("Marvell International Ltd.");
1218 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1219 MODULE_VERSION(VERSION);
1220 MODULE_LICENSE("GPL v2");
1221 MODULE_FIRMWARE("mrvl/sd8688_helper.bin");
1222 MODULE_FIRMWARE("mrvl/sd8688.bin");
1223 MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
1224 MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");
1225 MODULE_FIRMWARE("mrvl/sd8897_uapsta.bin");
Linus' kernel tree