Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

Linux/drivers/bluetooth/btmrvl_sdio.c

  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 #include <linux/devcoredump.h>
 28 
 29 #include <net/bluetooth/bluetooth.h>
 30 #include <net/bluetooth/hci_core.h>
 31 
 32 #include "btmrvl_drv.h"
 33 #include "btmrvl_sdio.h"
 34 
 35 #define VERSION "1.0"
 36 
 37 static struct memory_type_mapping mem_type_mapping_tbl[] = {
 38         {"ITCM", NULL, 0, 0xF0},
 39         {"DTCM", NULL, 0, 0xF1},
 40         {"SQRAM", NULL, 0, 0xF2},
 41         {"APU", NULL, 0, 0xF3},
 42         {"CIU", NULL, 0, 0xF4},
 43         {"ICU", NULL, 0, 0xF5},
 44         {"MAC", NULL, 0, 0xF6},
 45         {"EXT7", NULL, 0, 0xF7},
 46         {"EXT8", NULL, 0, 0xF8},
 47         {"EXT9", NULL, 0, 0xF9},
 48         {"EXT10", NULL, 0, 0xFA},
 49         {"EXT11", NULL, 0, 0xFB},
 50         {"EXT12", NULL, 0, 0xFC},
 51         {"EXT13", NULL, 0, 0xFD},
 52         {"EXTLAST", NULL, 0, 0xFE},
 53 };
 54 
 55 /* The btmrvl_sdio_remove() callback function is called
 56  * when user removes this module from kernel space or ejects
 57  * the card from the slot. The driver handles these 2 cases
 58  * differently.
 59  * If the user is removing the module, a MODULE_SHUTDOWN_REQ
 60  * command is sent to firmware and interrupt will be disabled.
 61  * If the card is removed, there is no need to send command
 62  * or disable interrupt.
 63  *
 64  * The variable 'user_rmmod' is used to distinguish these two
 65  * scenarios. This flag is initialized as FALSE in case the card
 66  * is removed, and will be set to TRUE for module removal when
 67  * module_exit function is called.
 68  */
 69 static u8 user_rmmod;
 70 static u8 sdio_ireg;
 71 
 72 static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = {
 73         .cfg = 0x03,
 74         .host_int_mask = 0x04,
 75         .host_intstatus = 0x05,
 76         .card_status = 0x20,
 77         .sq_read_base_addr_a0 = 0x10,
 78         .sq_read_base_addr_a1 = 0x11,
 79         .card_fw_status0 = 0x40,
 80         .card_fw_status1 = 0x41,
 81         .card_rx_len = 0x42,
 82         .card_rx_unit = 0x43,
 83         .io_port_0 = 0x00,
 84         .io_port_1 = 0x01,
 85         .io_port_2 = 0x02,
 86         .int_read_to_clear = false,
 87 };
 88 static const struct btmrvl_sdio_card_reg btmrvl_reg_87xx = {
 89         .cfg = 0x00,
 90         .host_int_mask = 0x02,
 91         .host_intstatus = 0x03,
 92         .card_status = 0x30,
 93         .sq_read_base_addr_a0 = 0x40,
 94         .sq_read_base_addr_a1 = 0x41,
 95         .card_revision = 0x5c,
 96         .card_fw_status0 = 0x60,
 97         .card_fw_status1 = 0x61,
 98         .card_rx_len = 0x62,
 99         .card_rx_unit = 0x63,
100         .io_port_0 = 0x78,
101         .io_port_1 = 0x79,
102         .io_port_2 = 0x7a,
103         .int_read_to_clear = false,
104 };
105 
106 static const struct btmrvl_sdio_card_reg btmrvl_reg_8887 = {
107         .cfg = 0x00,
108         .host_int_mask = 0x08,
109         .host_intstatus = 0x0C,
110         .card_status = 0x5C,
111         .sq_read_base_addr_a0 = 0x6C,
112         .sq_read_base_addr_a1 = 0x6D,
113         .card_revision = 0xC8,
114         .card_fw_status0 = 0x88,
115         .card_fw_status1 = 0x89,
116         .card_rx_len = 0x8A,
117         .card_rx_unit = 0x8B,
118         .io_port_0 = 0xE4,
119         .io_port_1 = 0xE5,
120         .io_port_2 = 0xE6,
121         .int_read_to_clear = true,
122         .host_int_rsr = 0x04,
123         .card_misc_cfg = 0xD8,
124 };
125 
126 static const struct btmrvl_sdio_card_reg btmrvl_reg_8897 = {
127         .cfg = 0x00,
128         .host_int_mask = 0x02,
129         .host_intstatus = 0x03,
130         .card_status = 0x50,
131         .sq_read_base_addr_a0 = 0x60,
132         .sq_read_base_addr_a1 = 0x61,
133         .card_revision = 0xbc,
134         .card_fw_status0 = 0xc0,
135         .card_fw_status1 = 0xc1,
136         .card_rx_len = 0xc2,
137         .card_rx_unit = 0xc3,
138         .io_port_0 = 0xd8,
139         .io_port_1 = 0xd9,
140         .io_port_2 = 0xda,
141         .int_read_to_clear = true,
142         .host_int_rsr = 0x01,
143         .card_misc_cfg = 0xcc,
144         .fw_dump_ctrl = 0xe2,
145         .fw_dump_start = 0xe3,
146         .fw_dump_end = 0xea,
147 };
148 
149 static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
150         .helper         = "mrvl/sd8688_helper.bin",
151         .firmware       = "mrvl/sd8688.bin",
152         .reg            = &btmrvl_reg_8688,
153         .support_pscan_win_report = false,
154         .sd_blksz_fw_dl = 64,
155         .supports_fw_dump = false,
156 };
157 
158 static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
159         .helper         = NULL,
160         .firmware       = "mrvl/sd8787_uapsta.bin",
161         .reg            = &btmrvl_reg_87xx,
162         .support_pscan_win_report = false,
163         .sd_blksz_fw_dl = 256,
164         .supports_fw_dump = false,
165 };
166 
167 static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
168         .helper         = NULL,
169         .firmware       = "mrvl/sd8797_uapsta.bin",
170         .reg            = &btmrvl_reg_87xx,
171         .support_pscan_win_report = false,
172         .sd_blksz_fw_dl = 256,
173         .supports_fw_dump = false,
174 };
175 
176 static const struct btmrvl_sdio_device btmrvl_sdio_sd8887 = {
177         .helper         = NULL,
178         .firmware       = "mrvl/sd8887_uapsta.bin",
179         .reg            = &btmrvl_reg_8887,
180         .support_pscan_win_report = true,
181         .sd_blksz_fw_dl = 256,
182         .supports_fw_dump = false,
183 };
184 
185 static const struct btmrvl_sdio_device btmrvl_sdio_sd8897 = {
186         .helper         = NULL,
187         .firmware       = "mrvl/sd8897_uapsta.bin",
188         .reg            = &btmrvl_reg_8897,
189         .support_pscan_win_report = true,
190         .sd_blksz_fw_dl = 256,
191         .supports_fw_dump = true,
192 };
193 
194 static const struct sdio_device_id btmrvl_sdio_ids[] = {
195         /* Marvell SD8688 Bluetooth device */
196         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
197                         .driver_data = (unsigned long) &btmrvl_sdio_sd8688 },
198         /* Marvell SD8787 Bluetooth device */
199         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
200                         .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
201         /* Marvell SD8787 Bluetooth AMP device */
202         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911B),
203                         .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
204         /* Marvell SD8797 Bluetooth device */
205         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A),
206                         .driver_data = (unsigned long) &btmrvl_sdio_sd8797 },
207         /* Marvell SD8887 Bluetooth device */
208         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9136),
209                         .driver_data = (unsigned long)&btmrvl_sdio_sd8887 },
210         /* Marvell SD8897 Bluetooth device */
211         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912E),
212                         .driver_data = (unsigned long) &btmrvl_sdio_sd8897 },
213 
214         { }     /* Terminating entry */
215 };
216 
217 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
218 
219 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
220 {
221         u8 reg;
222         int ret;
223 
224         reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
225         if (!ret)
226                 card->rx_unit = reg;
227 
228         return ret;
229 }
230 
231 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
232 {
233         u8 fws0, fws1;
234         int ret;
235 
236         *dat = 0;
237 
238         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
239         if (ret)
240                 return -EIO;
241 
242         fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
243         if (ret)
244                 return -EIO;
245 
246         *dat = (((u16) fws1) << 8) | fws0;
247 
248         return 0;
249 }
250 
251 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
252 {
253         u8 reg;
254         int ret;
255 
256         reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
257         if (!ret)
258                 *dat = (u16) reg << card->rx_unit;
259 
260         return ret;
261 }
262 
263 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
264                                                                 u8 mask)
265 {
266         int ret;
267 
268         sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
269         if (ret) {
270                 BT_ERR("Unable to enable the host interrupt!");
271                 ret = -EIO;
272         }
273 
274         return ret;
275 }
276 
277 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
278                                                                 u8 mask)
279 {
280         u8 host_int_mask;
281         int ret;
282 
283         host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
284         if (ret)
285                 return -EIO;
286 
287         host_int_mask &= ~mask;
288 
289         sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
290         if (ret < 0) {
291                 BT_ERR("Unable to disable the host interrupt!");
292                 return -EIO;
293         }
294 
295         return 0;
296 }
297 
298 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
299 {
300         unsigned int tries;
301         u8 status;
302         int ret;
303 
304         for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
305                 status = sdio_readb(card->func, card->reg->card_status, &ret);
306                 if (ret)
307                         goto failed;
308                 if ((status & bits) == bits)
309                         return ret;
310 
311                 udelay(1);
312         }
313 
314         ret = -ETIMEDOUT;
315 
316 failed:
317         BT_ERR("FAILED! ret=%d", ret);
318 
319         return ret;
320 }
321 
322 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
323                                                                 int pollnum)
324 {
325         u16 firmwarestat;
326         int tries, ret;
327 
328          /* Wait for firmware to become ready */
329         for (tries = 0; tries < pollnum; tries++) {
330                 sdio_claim_host(card->func);
331                 ret = btmrvl_sdio_read_fw_status(card, &firmwarestat);
332                 sdio_release_host(card->func);
333                 if (ret < 0)
334                         continue;
335 
336                 if (firmwarestat == FIRMWARE_READY)
337                         return 0;
338 
339                 msleep(10);
340         }
341 
342         return -ETIMEDOUT;
343 }
344 
345 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
346 {
347         const struct firmware *fw_helper = NULL;
348         const u8 *helper = NULL;
349         int ret;
350         void *tmphlprbuf = NULL;
351         int tmphlprbufsz, hlprblknow, helperlen;
352         u8 *helperbuf;
353         u32 tx_len;
354 
355         ret = request_firmware(&fw_helper, card->helper,
356                                                 &card->func->dev);
357         if ((ret < 0) || !fw_helper) {
358                 BT_ERR("request_firmware(helper) failed, error code = %d",
359                                                                         ret);
360                 ret = -ENOENT;
361                 goto done;
362         }
363 
364         helper = fw_helper->data;
365         helperlen = fw_helper->size;
366 
367         BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
368                                                 helperlen, SDIO_BLOCK_SIZE);
369 
370         tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
371 
372         tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
373         if (!tmphlprbuf) {
374                 BT_ERR("Unable to allocate buffer for helper."
375                         " Terminating download");
376                 ret = -ENOMEM;
377                 goto done;
378         }
379 
380         helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
381 
382         /* Perform helper data transfer */
383         tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
384                         - SDIO_HEADER_LEN;
385         hlprblknow = 0;
386 
387         do {
388                 ret = btmrvl_sdio_poll_card_status(card,
389                                             CARD_IO_READY | DN_LD_CARD_RDY);
390                 if (ret < 0) {
391                         BT_ERR("Helper download poll status timeout @ %d",
392                                 hlprblknow);
393                         goto done;
394                 }
395 
396                 /* Check if there is more data? */
397                 if (hlprblknow >= helperlen)
398                         break;
399 
400                 if (helperlen - hlprblknow < tx_len)
401                         tx_len = helperlen - hlprblknow;
402 
403                 /* Little-endian */
404                 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
405                 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
406                 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
407                 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
408 
409                 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
410                                 tx_len);
411 
412                 /* Now send the data */
413                 ret = sdio_writesb(card->func, card->ioport, helperbuf,
414                                 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
415                 if (ret < 0) {
416                         BT_ERR("IO error during helper download @ %d",
417                                 hlprblknow);
418                         goto done;
419                 }
420 
421                 hlprblknow += tx_len;
422         } while (true);
423 
424         BT_DBG("Transferring helper image EOF block");
425 
426         memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
427 
428         ret = sdio_writesb(card->func, card->ioport, helperbuf,
429                                                         SDIO_BLOCK_SIZE);
430         if (ret < 0) {
431                 BT_ERR("IO error in writing helper image EOF block");
432                 goto done;
433         }
434 
435         ret = 0;
436 
437 done:
438         kfree(tmphlprbuf);
439         release_firmware(fw_helper);
440         return ret;
441 }
442 
443 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
444 {
445         const struct firmware *fw_firmware = NULL;
446         const u8 *firmware = NULL;
447         int firmwarelen, tmpfwbufsz, ret;
448         unsigned int tries, offset;
449         u8 base0, base1;
450         void *tmpfwbuf = NULL;
451         u8 *fwbuf;
452         u16 len, blksz_dl = card->sd_blksz_fw_dl;
453         int txlen = 0, tx_blocks = 0, count = 0;
454 
455         ret = request_firmware(&fw_firmware, card->firmware,
456                                                         &card->func->dev);
457         if ((ret < 0) || !fw_firmware) {
458                 BT_ERR("request_firmware(firmware) failed, error code = %d",
459                                                                         ret);
460                 ret = -ENOENT;
461                 goto done;
462         }
463 
464         firmware = fw_firmware->data;
465         firmwarelen = fw_firmware->size;
466 
467         BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
468 
469         tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
470         tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
471         if (!tmpfwbuf) {
472                 BT_ERR("Unable to allocate buffer for firmware."
473                        " Terminating download");
474                 ret = -ENOMEM;
475                 goto done;
476         }
477 
478         /* Ensure aligned firmware buffer */
479         fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
480 
481         /* Perform firmware data transfer */
482         offset = 0;
483         do {
484                 ret = btmrvl_sdio_poll_card_status(card,
485                                         CARD_IO_READY | DN_LD_CARD_RDY);
486                 if (ret < 0) {
487                         BT_ERR("FW download with helper poll status"
488                                                 " timeout @ %d", offset);
489                         goto done;
490                 }
491 
492                 /* Check if there is more data ? */
493                 if (offset >= firmwarelen)
494                         break;
495 
496                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
497                         base0 = sdio_readb(card->func,
498                                         card->reg->sq_read_base_addr_a0, &ret);
499                         if (ret) {
500                                 BT_ERR("BASE0 register read failed:"
501                                         " base0 = 0x%04X(%d)."
502                                         " Terminating download",
503                                         base0, base0);
504                                 ret = -EIO;
505                                 goto done;
506                         }
507                         base1 = sdio_readb(card->func,
508                                         card->reg->sq_read_base_addr_a1, &ret);
509                         if (ret) {
510                                 BT_ERR("BASE1 register read failed:"
511                                         " base1 = 0x%04X(%d)."
512                                         " Terminating download",
513                                         base1, base1);
514                                 ret = -EIO;
515                                 goto done;
516                         }
517 
518                         len = (((u16) base1) << 8) | base0;
519                         if (len)
520                                 break;
521 
522                         udelay(10);
523                 }
524 
525                 if (!len)
526                         break;
527                 else if (len > BTM_UPLD_SIZE) {
528                         BT_ERR("FW download failure @%d, invalid length %d",
529                                                                 offset, len);
530                         ret = -EINVAL;
531                         goto done;
532                 }
533 
534                 txlen = len;
535 
536                 if (len & BIT(0)) {
537                         count++;
538                         if (count > MAX_WRITE_IOMEM_RETRY) {
539                                 BT_ERR("FW download failure @%d, "
540                                         "over max retry count", offset);
541                                 ret = -EIO;
542                                 goto done;
543                         }
544                         BT_ERR("FW CRC error indicated by the helper: "
545                                 "len = 0x%04X, txlen = %d", len, txlen);
546                         len &= ~BIT(0);
547                         /* Set txlen to 0 so as to resend from same offset */
548                         txlen = 0;
549                 } else {
550                         count = 0;
551 
552                         /* Last block ? */
553                         if (firmwarelen - offset < txlen)
554                                 txlen = firmwarelen - offset;
555 
556                         tx_blocks = DIV_ROUND_UP(txlen, blksz_dl);
557 
558                         memcpy(fwbuf, &firmware[offset], txlen);
559                 }
560 
561                 ret = sdio_writesb(card->func, card->ioport, fwbuf,
562                                                 tx_blocks * blksz_dl);
563 
564                 if (ret < 0) {
565                         BT_ERR("FW download, writesb(%d) failed @%d",
566                                                         count, offset);
567                         sdio_writeb(card->func, HOST_CMD53_FIN,
568                                                 card->reg->cfg, &ret);
569                         if (ret)
570                                 BT_ERR("writeb failed (CFG)");
571                 }
572 
573                 offset += txlen;
574         } while (true);
575 
576         BT_INFO("FW download over, size %d bytes", offset);
577 
578         ret = 0;
579 
580 done:
581         kfree(tmpfwbuf);
582         release_firmware(fw_firmware);
583         return ret;
584 }
585 
586 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
587 {
588         u16 buf_len = 0;
589         int ret, num_blocks, blksz;
590         struct sk_buff *skb = NULL;
591         u32 type;
592         u8 *payload = NULL;
593         struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
594         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
595 
596         if (!card || !card->func) {
597                 BT_ERR("card or function is NULL!");
598                 ret = -EINVAL;
599                 goto exit;
600         }
601 
602         /* Read the length of data to be transferred */
603         ret = btmrvl_sdio_read_rx_len(card, &buf_len);
604         if (ret < 0) {
605                 BT_ERR("read rx_len failed");
606                 ret = -EIO;
607                 goto exit;
608         }
609 
610         blksz = SDIO_BLOCK_SIZE;
611         num_blocks = DIV_ROUND_UP(buf_len, blksz);
612 
613         if (buf_len <= SDIO_HEADER_LEN
614             || (num_blocks * blksz) > ALLOC_BUF_SIZE) {
615                 BT_ERR("invalid packet length: %d", buf_len);
616                 ret = -EINVAL;
617                 goto exit;
618         }
619 
620         /* Allocate buffer */
621         skb = bt_skb_alloc(num_blocks * blksz + BTSDIO_DMA_ALIGN, GFP_ATOMIC);
622         if (skb == NULL) {
623                 BT_ERR("No free skb");
624                 ret = -ENOMEM;
625                 goto exit;
626         }
627 
628         if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
629                 skb_put(skb, (unsigned long) skb->data &
630                                         (BTSDIO_DMA_ALIGN - 1));
631                 skb_pull(skb, (unsigned long) skb->data &
632                                         (BTSDIO_DMA_ALIGN - 1));
633         }
634 
635         payload = skb->data;
636 
637         ret = sdio_readsb(card->func, payload, card->ioport,
638                           num_blocks * blksz);
639         if (ret < 0) {
640                 BT_ERR("readsb failed: %d", ret);
641                 ret = -EIO;
642                 goto exit;
643         }
644 
645         /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
646          * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
647          */
648 
649         buf_len = payload[0];
650         buf_len |= payload[1] << 8;
651         buf_len |= payload[2] << 16;
652 
653         if (buf_len > blksz * num_blocks) {
654                 BT_ERR("Skip incorrect packet: hdrlen %d buffer %d",
655                        buf_len, blksz * num_blocks);
656                 ret = -EIO;
657                 goto exit;
658         }
659 
660         type = payload[3];
661 
662         switch (type) {
663         case HCI_ACLDATA_PKT:
664         case HCI_SCODATA_PKT:
665         case HCI_EVENT_PKT:
666                 bt_cb(skb)->pkt_type = type;
667                 skb_put(skb, buf_len);
668                 skb_pull(skb, SDIO_HEADER_LEN);
669 
670                 if (type == HCI_EVENT_PKT) {
671                         if (btmrvl_check_evtpkt(priv, skb))
672                                 hci_recv_frame(hdev, skb);
673                 } else {
674                         hci_recv_frame(hdev, skb);
675                 }
676 
677                 hdev->stat.byte_rx += buf_len;
678                 break;
679 
680         case MRVL_VENDOR_PKT:
681                 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
682                 skb_put(skb, buf_len);
683                 skb_pull(skb, SDIO_HEADER_LEN);
684 
685                 if (btmrvl_process_event(priv, skb))
686                         hci_recv_frame(hdev, skb);
687 
688                 hdev->stat.byte_rx += buf_len;
689                 break;
690 
691         default:
692                 BT_ERR("Unknown packet type:%d", type);
693                 BT_ERR("hex: %*ph", blksz * num_blocks, payload);
694 
695                 kfree_skb(skb);
696                 skb = NULL;
697                 break;
698         }
699 
700 exit:
701         if (ret) {
702                 hdev->stat.err_rx++;
703                 kfree_skb(skb);
704         }
705 
706         return ret;
707 }
708 
709 static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
710 {
711         ulong flags;
712         u8 ireg;
713         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
714 
715         spin_lock_irqsave(&priv->driver_lock, flags);
716         ireg = sdio_ireg;
717         sdio_ireg = 0;
718         spin_unlock_irqrestore(&priv->driver_lock, flags);
719 
720         sdio_claim_host(card->func);
721         if (ireg & DN_LD_HOST_INT_STATUS) {
722                 if (priv->btmrvl_dev.tx_dnld_rdy)
723                         BT_DBG("tx_done already received: "
724                                 " int_status=0x%x", ireg);
725                 else
726                         priv->btmrvl_dev.tx_dnld_rdy = true;
727         }
728 
729         if (ireg & UP_LD_HOST_INT_STATUS)
730                 btmrvl_sdio_card_to_host(priv);
731 
732         sdio_release_host(card->func);
733 
734         return 0;
735 }
736 
737 static int btmrvl_sdio_read_to_clear(struct btmrvl_sdio_card *card, u8 *ireg)
738 {
739         struct btmrvl_adapter *adapter = card->priv->adapter;
740         int ret;
741 
742         ret = sdio_readsb(card->func, adapter->hw_regs, 0, SDIO_BLOCK_SIZE);
743         if (ret) {
744                 BT_ERR("sdio_readsb: read int hw_regs failed: %d", ret);
745                 return ret;
746         }
747 
748         *ireg = adapter->hw_regs[card->reg->host_intstatus];
749         BT_DBG("hw_regs[%#x]=%#x", card->reg->host_intstatus, *ireg);
750 
751         return 0;
752 }
753 
754 static int btmrvl_sdio_write_to_clear(struct btmrvl_sdio_card *card, u8 *ireg)
755 {
756         int ret;
757 
758         *ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
759         if (ret) {
760                 BT_ERR("sdio_readb: read int status failed: %d", ret);
761                 return ret;
762         }
763 
764         if (*ireg) {
765                 /*
766                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
767                  * Clear the interrupt status register and re-enable the
768                  * interrupt.
769                  */
770                 BT_DBG("int_status = 0x%x", *ireg);
771 
772                 sdio_writeb(card->func, ~(*ireg) & (DN_LD_HOST_INT_STATUS |
773                                                     UP_LD_HOST_INT_STATUS),
774                             card->reg->host_intstatus, &ret);
775                 if (ret) {
776                         BT_ERR("sdio_writeb: clear int status failed: %d", ret);
777                         return ret;
778                 }
779         }
780 
781         return 0;
782 }
783 
784 static void btmrvl_sdio_interrupt(struct sdio_func *func)
785 {
786         struct btmrvl_private *priv;
787         struct btmrvl_sdio_card *card;
788         ulong flags;
789         u8 ireg = 0;
790         int ret;
791 
792         card = sdio_get_drvdata(func);
793         if (!card || !card->priv) {
794                 BT_ERR("sbi_interrupt(%p) card or priv is NULL, card=%p",
795                        func, card);
796                 return;
797         }
798 
799         priv = card->priv;
800 
801         if (priv->surprise_removed)
802                 return;
803 
804         if (card->reg->int_read_to_clear)
805                 ret = btmrvl_sdio_read_to_clear(card, &ireg);
806         else
807                 ret = btmrvl_sdio_write_to_clear(card, &ireg);
808 
809         if (ret)
810                 return;
811 
812         spin_lock_irqsave(&priv->driver_lock, flags);
813         sdio_ireg |= ireg;
814         spin_unlock_irqrestore(&priv->driver_lock, flags);
815 
816         btmrvl_interrupt(priv);
817 }
818 
819 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
820 {
821         struct sdio_func *func;
822         u8 reg;
823         int ret = 0;
824 
825         if (!card || !card->func) {
826                 BT_ERR("Error: card or function is NULL!");
827                 ret = -EINVAL;
828                 goto failed;
829         }
830 
831         func = card->func;
832 
833         sdio_claim_host(func);
834 
835         ret = sdio_enable_func(func);
836         if (ret) {
837                 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
838                 ret = -EIO;
839                 goto release_host;
840         }
841 
842         ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
843         if (ret) {
844                 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
845                 ret = -EIO;
846                 goto disable_func;
847         }
848 
849         ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
850         if (ret) {
851                 BT_ERR("cannot set SDIO block size");
852                 ret = -EIO;
853                 goto release_irq;
854         }
855 
856         reg = sdio_readb(func, card->reg->io_port_0, &ret);
857         if (ret < 0) {
858                 ret = -EIO;
859                 goto release_irq;
860         }
861 
862         card->ioport = reg;
863 
864         reg = sdio_readb(func, card->reg->io_port_1, &ret);
865         if (ret < 0) {
866                 ret = -EIO;
867                 goto release_irq;
868         }
869 
870         card->ioport |= (reg << 8);
871 
872         reg = sdio_readb(func, card->reg->io_port_2, &ret);
873         if (ret < 0) {
874                 ret = -EIO;
875                 goto release_irq;
876         }
877 
878         card->ioport |= (reg << 16);
879 
880         BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
881 
882         if (card->reg->int_read_to_clear) {
883                 reg = sdio_readb(func, card->reg->host_int_rsr, &ret);
884                 if (ret < 0) {
885                         ret = -EIO;
886                         goto release_irq;
887                 }
888                 sdio_writeb(func, reg | 0x3f, card->reg->host_int_rsr, &ret);
889                 if (ret < 0) {
890                         ret = -EIO;
891                         goto release_irq;
892                 }
893 
894                 reg = sdio_readb(func, card->reg->card_misc_cfg, &ret);
895                 if (ret < 0) {
896                         ret = -EIO;
897                         goto release_irq;
898                 }
899                 sdio_writeb(func, reg | 0x10, card->reg->card_misc_cfg, &ret);
900                 if (ret < 0) {
901                         ret = -EIO;
902                         goto release_irq;
903                 }
904         }
905 
906         sdio_set_drvdata(func, card);
907 
908         sdio_release_host(func);
909 
910         return 0;
911 
912 release_irq:
913         sdio_release_irq(func);
914 
915 disable_func:
916         sdio_disable_func(func);
917 
918 release_host:
919         sdio_release_host(func);
920 
921 failed:
922         return ret;
923 }
924 
925 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
926 {
927         if (card && card->func) {
928                 sdio_claim_host(card->func);
929                 sdio_release_irq(card->func);
930                 sdio_disable_func(card->func);
931                 sdio_release_host(card->func);
932                 sdio_set_drvdata(card->func, NULL);
933         }
934 
935         return 0;
936 }
937 
938 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
939 {
940         int ret;
941 
942         if (!card || !card->func)
943                 return -EINVAL;
944 
945         sdio_claim_host(card->func);
946 
947         ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
948 
949         btmrvl_sdio_get_rx_unit(card);
950 
951         sdio_release_host(card->func);
952 
953         return ret;
954 }
955 
956 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
957 {
958         int ret;
959 
960         if (!card || !card->func)
961                 return -EINVAL;
962 
963         sdio_claim_host(card->func);
964 
965         ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
966 
967         sdio_release_host(card->func);
968 
969         return ret;
970 }
971 
972 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
973                                 u8 *payload, u16 nb)
974 {
975         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
976         int ret = 0;
977         int buf_block_len;
978         int blksz;
979         int i = 0;
980         u8 *buf = NULL;
981         void *tmpbuf = NULL;
982         int tmpbufsz;
983 
984         if (!card || !card->func) {
985                 BT_ERR("card or function is NULL!");
986                 return -EINVAL;
987         }
988 
989         buf = payload;
990         if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
991                 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
992                 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
993                 if (!tmpbuf)
994                         return -ENOMEM;
995                 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
996                 memcpy(buf, payload, nb);
997         }
998 
999         blksz = SDIO_BLOCK_SIZE;
1000         buf_block_len = DIV_ROUND_UP(nb, blksz);
1001 
1002         sdio_claim_host(card->func);
1003 
1004         do {
1005                 /* Transfer data to card */
1006                 ret = sdio_writesb(card->func, card->ioport, buf,
1007                                    buf_block_len * blksz);
1008                 if (ret < 0) {
1009                         i++;
1010                         BT_ERR("i=%d writesb failed: %d", i, ret);
1011                         BT_ERR("hex: %*ph", nb, payload);
1012                         ret = -EIO;
1013                         if (i > MAX_WRITE_IOMEM_RETRY)
1014                                 goto exit;
1015                 }
1016         } while (ret);
1017 
1018         priv->btmrvl_dev.tx_dnld_rdy = false;
1019 
1020 exit:
1021         sdio_release_host(card->func);
1022         kfree(tmpbuf);
1023 
1024         return ret;
1025 }
1026 
1027 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
1028 {
1029         int ret;
1030         u8 fws0;
1031         int pollnum = MAX_POLL_TRIES;
1032 
1033         if (!card || !card->func) {
1034                 BT_ERR("card or function is NULL!");
1035                 return -EINVAL;
1036         }
1037 
1038         if (!btmrvl_sdio_verify_fw_download(card, 1)) {
1039                 BT_DBG("Firmware already downloaded!");
1040                 return 0;
1041         }
1042 
1043         sdio_claim_host(card->func);
1044 
1045         /* Check if other function driver is downloading the firmware */
1046         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
1047         if (ret) {
1048                 BT_ERR("Failed to read FW downloading status!");
1049                 ret = -EIO;
1050                 goto done;
1051         }
1052         if (fws0) {
1053                 BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
1054 
1055                 /* Give other function more time to download the firmware */
1056                 pollnum *= 10;
1057         } else {
1058                 if (card->helper) {
1059                         ret = btmrvl_sdio_download_helper(card);
1060                         if (ret) {
1061                                 BT_ERR("Failed to download helper!");
1062                                 ret = -EIO;
1063                                 goto done;
1064                         }
1065                 }
1066 
1067                 if (btmrvl_sdio_download_fw_w_helper(card)) {
1068                         BT_ERR("Failed to download firmware!");
1069                         ret = -EIO;
1070                         goto done;
1071                 }
1072         }
1073 
1074         sdio_release_host(card->func);
1075 
1076         /*
1077          * winner or not, with this test the FW synchronizes when the
1078          * module can continue its initialization
1079          */
1080         if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
1081                 BT_ERR("FW failed to be active in time!");
1082                 return -ETIMEDOUT;
1083         }
1084 
1085         return 0;
1086 
1087 done:
1088         sdio_release_host(card->func);
1089         return ret;
1090 }
1091 
1092 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
1093 {
1094         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1095         int ret = 0;
1096 
1097         if (!card || !card->func) {
1098                 BT_ERR("card or function is NULL!");
1099                 return -EINVAL;
1100         }
1101 
1102         sdio_claim_host(card->func);
1103 
1104         sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
1105 
1106         sdio_release_host(card->func);
1107 
1108         BT_DBG("wake up firmware");
1109 
1110         return ret;
1111 }
1112 
1113 static void btmrvl_sdio_dump_regs(struct btmrvl_private *priv)
1114 {
1115         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1116         int ret = 0;
1117         unsigned int reg, reg_start, reg_end;
1118         char buf[256], *ptr;
1119         u8 loop, func, data;
1120         int MAX_LOOP = 2;
1121 
1122         btmrvl_sdio_wakeup_fw(priv);
1123         sdio_claim_host(card->func);
1124 
1125         for (loop = 0; loop < MAX_LOOP; loop++) {
1126                 memset(buf, 0, sizeof(buf));
1127                 ptr = buf;
1128 
1129                 if (loop == 0) {
1130                         /* Read the registers of SDIO function0 */
1131                         func = loop;
1132                         reg_start = 0;
1133                         reg_end = 9;
1134                 } else {
1135                         func = 2;
1136                         reg_start = 0;
1137                         reg_end = 0x09;
1138                 }
1139 
1140                 ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ",
1141                                func, reg_start, reg_end);
1142                 for (reg = reg_start; reg <= reg_end; reg++) {
1143                         if (func == 0)
1144                                 data = sdio_f0_readb(card->func, reg, &ret);
1145                         else
1146                                 data = sdio_readb(card->func, reg, &ret);
1147 
1148                         if (!ret) {
1149                                 ptr += sprintf(ptr, "%02x ", data);
1150                         } else {
1151                                 ptr += sprintf(ptr, "ERR");
1152                                 break;
1153                         }
1154                 }
1155 
1156                 BT_INFO("%s", buf);
1157         }
1158 
1159         sdio_release_host(card->func);
1160 }
1161 
1162 /* This function read/write firmware */
1163 static enum
1164 rdwr_status btmrvl_sdio_rdwr_firmware(struct btmrvl_private *priv,
1165                                       u8 doneflag)
1166 {
1167         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1168         int ret, tries;
1169         u8 ctrl_data = 0;
1170 
1171         sdio_writeb(card->func, FW_DUMP_HOST_READY, card->reg->fw_dump_ctrl,
1172                     &ret);
1173 
1174         if (ret) {
1175                 BT_ERR("SDIO write err");
1176                 return RDWR_STATUS_FAILURE;
1177         }
1178 
1179         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
1180                 ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
1181                                        &ret);
1182 
1183                 if (ret) {
1184                         BT_ERR("SDIO read err");
1185                         return RDWR_STATUS_FAILURE;
1186                 }
1187 
1188                 if (ctrl_data == FW_DUMP_DONE)
1189                         break;
1190                 if (doneflag && ctrl_data == doneflag)
1191                         return RDWR_STATUS_DONE;
1192                 if (ctrl_data != FW_DUMP_HOST_READY) {
1193                         BT_INFO("The ctrl reg was changed, re-try again!");
1194                         sdio_writeb(card->func, FW_DUMP_HOST_READY,
1195                                     card->reg->fw_dump_ctrl, &ret);
1196                         if (ret) {
1197                                 BT_ERR("SDIO write err");
1198                                 return RDWR_STATUS_FAILURE;
1199                         }
1200                 }
1201                 usleep_range(100, 200);
1202         }
1203 
1204         if (ctrl_data == FW_DUMP_HOST_READY) {
1205                 BT_ERR("Fail to pull ctrl_data");
1206                 return RDWR_STATUS_FAILURE;
1207         }
1208 
1209         return RDWR_STATUS_SUCCESS;
1210 }
1211 
1212 /* This function dump sdio register and memory data */
1213 static void btmrvl_sdio_dump_firmware(struct btmrvl_private *priv)
1214 {
1215         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1216         int ret = 0;
1217         unsigned int reg, reg_start, reg_end;
1218         enum rdwr_status stat;
1219         u8 *dbg_ptr, *end_ptr, *fw_dump_data, *fw_dump_ptr;
1220         u8 dump_num, idx, i, read_reg, doneflag = 0;
1221         u32 memory_size, fw_dump_len = 0;
1222 
1223         /* dump sdio register first */
1224         btmrvl_sdio_dump_regs(priv);
1225 
1226         if (!card->supports_fw_dump) {
1227                 BT_ERR("Firmware dump not supported for this card!");
1228                 return;
1229         }
1230 
1231         for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
1232                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
1233 
1234                 if (entry->mem_ptr) {
1235                         vfree(entry->mem_ptr);
1236                         entry->mem_ptr = NULL;
1237                 }
1238                 entry->mem_size = 0;
1239         }
1240 
1241         btmrvl_sdio_wakeup_fw(priv);
1242         sdio_claim_host(card->func);
1243 
1244         BT_INFO("== btmrvl firmware dump start ==");
1245 
1246         stat = btmrvl_sdio_rdwr_firmware(priv, doneflag);
1247         if (stat == RDWR_STATUS_FAILURE)
1248                 goto done;
1249 
1250         reg = card->reg->fw_dump_start;
1251         /* Read the number of the memories which will dump */
1252         dump_num = sdio_readb(card->func, reg, &ret);
1253 
1254         if (ret) {
1255                 BT_ERR("SDIO read memory length err");
1256                 goto done;
1257         }
1258 
1259         /* Read the length of every memory which will dump */
1260         for (idx = 0; idx < dump_num; idx++) {
1261                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
1262 
1263                 stat = btmrvl_sdio_rdwr_firmware(priv, doneflag);
1264                 if (stat == RDWR_STATUS_FAILURE)
1265                         goto done;
1266 
1267                 memory_size = 0;
1268                 reg = card->reg->fw_dump_start;
1269                 for (i = 0; i < 4; i++) {
1270                         read_reg = sdio_readb(card->func, reg, &ret);
1271                         if (ret) {
1272                                 BT_ERR("SDIO read err");
1273                                 goto done;
1274                         }
1275                         memory_size |= (read_reg << i*8);
1276                         reg++;
1277                 }
1278 
1279                 if (memory_size == 0) {
1280                         BT_INFO("Firmware dump finished!");
1281                         break;
1282                 }
1283 
1284                 BT_INFO("%s_SIZE=0x%x", entry->mem_name, memory_size);
1285                 entry->mem_ptr = vzalloc(memory_size + 1);
1286                 entry->mem_size = memory_size;
1287                 if (!entry->mem_ptr) {
1288                         BT_ERR("Vzalloc %s failed", entry->mem_name);
1289                         goto done;
1290                 }
1291 
1292                 fw_dump_len += (strlen("========Start dump ") +
1293                                 strlen(entry->mem_name) +
1294                                 strlen("========\n") +
1295                                 (memory_size + 1) +
1296                                 strlen("\n========End dump========\n"));
1297 
1298                 dbg_ptr = entry->mem_ptr;
1299                 end_ptr = dbg_ptr + memory_size;
1300 
1301                 doneflag = entry->done_flag;
1302                 BT_INFO("Start %s output, please wait...",
1303                         entry->mem_name);
1304 
1305                 do {
1306                         stat = btmrvl_sdio_rdwr_firmware(priv, doneflag);
1307                         if (stat == RDWR_STATUS_FAILURE)
1308                                 goto done;
1309 
1310                         reg_start = card->reg->fw_dump_start;
1311                         reg_end = card->reg->fw_dump_end;
1312                         for (reg = reg_start; reg <= reg_end; reg++) {
1313                                 *dbg_ptr = sdio_readb(card->func, reg, &ret);
1314                                 if (ret) {
1315                                         BT_ERR("SDIO read err");
1316                                         goto done;
1317                                 }
1318                                 if (dbg_ptr < end_ptr)
1319                                         dbg_ptr++;
1320                                 else
1321                                         BT_ERR("Allocated buffer not enough");
1322                         }
1323 
1324                         if (stat != RDWR_STATUS_DONE) {
1325                                 continue;
1326                         } else {
1327                                 BT_INFO("%s done: size=0x%tx",
1328                                         entry->mem_name,
1329                                         dbg_ptr - entry->mem_ptr);
1330                                 break;
1331                         }
1332                 } while (1);
1333         }
1334 
1335         BT_INFO("== btmrvl firmware dump end ==");
1336 
1337 done:
1338         sdio_release_host(card->func);
1339 
1340         if (fw_dump_len == 0)
1341                 return;
1342 
1343         fw_dump_data = vzalloc(fw_dump_len+1);
1344         if (!fw_dump_data) {
1345                 BT_ERR("Vzalloc fw_dump_data fail!");
1346                 return;
1347         }
1348         fw_dump_ptr = fw_dump_data;
1349 
1350         /* Dump all the memory data into single file, a userspace script will
1351            be used to split all the memory data to multiple files*/
1352         BT_INFO("== btmrvl firmware dump to /sys/class/devcoredump start");
1353         for (idx = 0; idx < dump_num; idx++) {
1354                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
1355 
1356                 if (entry->mem_ptr) {
1357                         strcpy(fw_dump_ptr, "========Start dump ");
1358                         fw_dump_ptr += strlen("========Start dump ");
1359 
1360                         strcpy(fw_dump_ptr, entry->mem_name);
1361                         fw_dump_ptr += strlen(entry->mem_name);
1362 
1363                         strcpy(fw_dump_ptr, "========\n");
1364                         fw_dump_ptr += strlen("========\n");
1365 
1366                         memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
1367                         fw_dump_ptr += entry->mem_size;
1368 
1369                         strcpy(fw_dump_ptr, "\n========End dump========\n");
1370                         fw_dump_ptr += strlen("\n========End dump========\n");
1371 
1372                         vfree(mem_type_mapping_tbl[idx].mem_ptr);
1373                         mem_type_mapping_tbl[idx].mem_ptr = NULL;
1374                 }
1375         }
1376 
1377         /* fw_dump_data will be free in device coredump release function
1378            after 5 min*/
1379         dev_coredumpv(&priv->btmrvl_dev.hcidev->dev, fw_dump_data,
1380                       fw_dump_len, GFP_KERNEL);
1381         BT_INFO("== btmrvl firmware dump to /sys/class/devcoredump end");
1382 }
1383 
1384 static int btmrvl_sdio_probe(struct sdio_func *func,
1385                                         const struct sdio_device_id *id)
1386 {
1387         int ret = 0;
1388         struct btmrvl_private *priv = NULL;
1389         struct btmrvl_sdio_card *card = NULL;
1390 
1391         BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
1392                         id->vendor, id->device, id->class, func->num);
1393 
1394         card = devm_kzalloc(&func->dev, sizeof(*card), GFP_KERNEL);
1395         if (!card)
1396                 return -ENOMEM;
1397 
1398         card->func = func;
1399 
1400         if (id->driver_data) {
1401                 struct btmrvl_sdio_device *data = (void *) id->driver_data;
1402                 card->helper = data->helper;
1403                 card->firmware = data->firmware;
1404                 card->reg = data->reg;
1405                 card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
1406                 card->support_pscan_win_report = data->support_pscan_win_report;
1407                 card->supports_fw_dump = data->supports_fw_dump;
1408         }
1409 
1410         if (btmrvl_sdio_register_dev(card) < 0) {
1411                 BT_ERR("Failed to register BT device!");
1412                 return -ENODEV;
1413         }
1414 
1415         /* Disable the interrupts on the card */
1416         btmrvl_sdio_disable_host_int(card);
1417 
1418         if (btmrvl_sdio_download_fw(card)) {
1419                 BT_ERR("Downloading firmware failed!");
1420                 ret = -ENODEV;
1421                 goto unreg_dev;
1422         }
1423 
1424         btmrvl_sdio_enable_host_int(card);
1425 
1426         priv = btmrvl_add_card(card);
1427         if (!priv) {
1428                 BT_ERR("Initializing card failed!");
1429                 ret = -ENODEV;
1430                 goto disable_host_int;
1431         }
1432 
1433         card->priv = priv;
1434 
1435         /* Initialize the interface specific function pointers */
1436         priv->hw_host_to_card = btmrvl_sdio_host_to_card;
1437         priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
1438         priv->hw_process_int_status = btmrvl_sdio_process_int_status;
1439         priv->firmware_dump = btmrvl_sdio_dump_firmware;
1440 
1441         if (btmrvl_register_hdev(priv)) {
1442                 BT_ERR("Register hdev failed!");
1443                 ret = -ENODEV;
1444                 goto disable_host_int;
1445         }
1446 
1447         return 0;
1448 
1449 disable_host_int:
1450         btmrvl_sdio_disable_host_int(card);
1451 unreg_dev:
1452         btmrvl_sdio_unregister_dev(card);
1453         return ret;
1454 }
1455 
1456 static void btmrvl_sdio_remove(struct sdio_func *func)
1457 {
1458         struct btmrvl_sdio_card *card;
1459 
1460         if (func) {
1461                 card = sdio_get_drvdata(func);
1462                 if (card) {
1463                         /* Send SHUTDOWN command & disable interrupt
1464                          * if user removes the module.
1465                          */
1466                         if (user_rmmod) {
1467                                 btmrvl_send_module_cfg_cmd(card->priv,
1468                                                         MODULE_SHUTDOWN_REQ);
1469                                 btmrvl_sdio_disable_host_int(card);
1470                         }
1471                         BT_DBG("unregester dev");
1472                         card->priv->surprise_removed = true;
1473                         btmrvl_sdio_unregister_dev(card);
1474                         btmrvl_remove_card(card->priv);
1475                 }
1476         }
1477 }
1478 
1479 static int btmrvl_sdio_suspend(struct device *dev)
1480 {
1481         struct sdio_func *func = dev_to_sdio_func(dev);
1482         struct btmrvl_sdio_card *card;
1483         struct btmrvl_private *priv;
1484         mmc_pm_flag_t pm_flags;
1485         struct hci_dev *hcidev;
1486 
1487         if (func) {
1488                 pm_flags = sdio_get_host_pm_caps(func);
1489                 BT_DBG("%s: suspend: PM flags = 0x%x", sdio_func_id(func),
1490                        pm_flags);
1491                 if (!(pm_flags & MMC_PM_KEEP_POWER)) {
1492                         BT_ERR("%s: cannot remain alive while suspended",
1493                                sdio_func_id(func));
1494                         return -ENOSYS;
1495                 }
1496                 card = sdio_get_drvdata(func);
1497                 if (!card || !card->priv) {
1498                         BT_ERR("card or priv structure is not valid");
1499                         return 0;
1500                 }
1501         } else {
1502                 BT_ERR("sdio_func is not specified");
1503                 return 0;
1504         }
1505 
1506         priv = card->priv;
1507         hcidev = priv->btmrvl_dev.hcidev;
1508         BT_DBG("%s: SDIO suspend", hcidev->name);
1509         hci_suspend_dev(hcidev);
1510         skb_queue_purge(&priv->adapter->tx_queue);
1511 
1512         if (priv->adapter->hs_state != HS_ACTIVATED) {
1513                 if (btmrvl_enable_hs(priv)) {
1514                         BT_ERR("HS not actived, suspend failed!");
1515                         return -EBUSY;
1516                 }
1517         }
1518 
1519         priv->adapter->is_suspended = true;
1520 
1521         /* We will keep the power when hs enabled successfully */
1522         if (priv->adapter->hs_state == HS_ACTIVATED) {
1523                 BT_DBG("suspend with MMC_PM_KEEP_POWER");
1524                 return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1525         } else {
1526                 BT_DBG("suspend without MMC_PM_KEEP_POWER");
1527                 return 0;
1528         }
1529 }
1530 
1531 static int btmrvl_sdio_resume(struct device *dev)
1532 {
1533         struct sdio_func *func = dev_to_sdio_func(dev);
1534         struct btmrvl_sdio_card *card;
1535         struct btmrvl_private *priv;
1536         mmc_pm_flag_t pm_flags;
1537         struct hci_dev *hcidev;
1538 
1539         if (func) {
1540                 pm_flags = sdio_get_host_pm_caps(func);
1541                 BT_DBG("%s: resume: PM flags = 0x%x", sdio_func_id(func),
1542                        pm_flags);
1543                 card = sdio_get_drvdata(func);
1544                 if (!card || !card->priv) {
1545                         BT_ERR("card or priv structure is not valid");
1546                         return 0;
1547                 }
1548         } else {
1549                 BT_ERR("sdio_func is not specified");
1550                 return 0;
1551         }
1552         priv = card->priv;
1553 
1554         if (!priv->adapter->is_suspended) {
1555                 BT_DBG("device already resumed");
1556                 return 0;
1557         }
1558 
1559         priv->hw_wakeup_firmware(priv);
1560         priv->adapter->hs_state = HS_DEACTIVATED;
1561         hcidev = priv->btmrvl_dev.hcidev;
1562         BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name);
1563         priv->adapter->is_suspended = false;
1564         BT_DBG("%s: SDIO resume", hcidev->name);
1565         hci_resume_dev(hcidev);
1566 
1567         return 0;
1568 }
1569 
1570 static const struct dev_pm_ops btmrvl_sdio_pm_ops = {
1571         .suspend        = btmrvl_sdio_suspend,
1572         .resume         = btmrvl_sdio_resume,
1573 };
1574 
1575 static struct sdio_driver bt_mrvl_sdio = {
1576         .name           = "btmrvl_sdio",
1577         .id_table       = btmrvl_sdio_ids,
1578         .probe          = btmrvl_sdio_probe,
1579         .remove         = btmrvl_sdio_remove,
1580         .drv = {
1581                 .owner = THIS_MODULE,
1582                 .pm = &btmrvl_sdio_pm_ops,
1583         }
1584 };
1585 
1586 static int __init btmrvl_sdio_init_module(void)
1587 {
1588         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1589                 BT_ERR("SDIO Driver Registration Failed");
1590                 return -ENODEV;
1591         }
1592 
1593         /* Clear the flag in case user removes the card. */
1594         user_rmmod = 0;
1595 
1596         return 0;
1597 }
1598 
1599 static void __exit btmrvl_sdio_exit_module(void)
1600 {
1601         /* Set the flag as user is removing this module. */
1602         user_rmmod = 1;
1603 
1604         sdio_unregister_driver(&bt_mrvl_sdio);
1605 }
1606 
1607 module_init(btmrvl_sdio_init_module);
1608 module_exit(btmrvl_sdio_exit_module);
1609 
1610 MODULE_AUTHOR("Marvell International Ltd.");
1611 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1612 MODULE_VERSION(VERSION);
1613 MODULE_LICENSE("GPL v2");
1614 MODULE_FIRMWARE("mrvl/sd8688_helper.bin");
1615 MODULE_FIRMWARE("mrvl/sd8688.bin");
1616 MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
1617 MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");
1618 MODULE_FIRMWARE("mrvl/sd8887_uapsta.bin");
1619 MODULE_FIRMWARE("mrvl/sd8897_uapsta.bin");
1620 

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