Version:  2.0.40 2.2.26 2.4.37 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 4.1 4.2 4.3 4.4

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_card_reg btmrvl_reg_8997 = {
150         .cfg = 0x00,
151         .host_int_mask = 0x08,
152         .host_intstatus = 0x0c,
153         .card_status = 0x5c,
154         .sq_read_base_addr_a0 = 0xf8,
155         .sq_read_base_addr_a1 = 0xf9,
156         .card_revision = 0xc8,
157         .card_fw_status0 = 0xe8,
158         .card_fw_status1 = 0xe9,
159         .card_rx_len = 0xea,
160         .card_rx_unit = 0xeb,
161         .io_port_0 = 0xe4,
162         .io_port_1 = 0xe5,
163         .io_port_2 = 0xe6,
164         .int_read_to_clear = true,
165         .host_int_rsr = 0x04,
166         .card_misc_cfg = 0xD8,
167         .fw_dump_ctrl = 0xf0,
168         .fw_dump_start = 0xf1,
169         .fw_dump_end = 0xf8,
170 };
171 
172 static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
173         .helper         = "mrvl/sd8688_helper.bin",
174         .firmware       = "mrvl/sd8688.bin",
175         .reg            = &btmrvl_reg_8688,
176         .support_pscan_win_report = false,
177         .sd_blksz_fw_dl = 64,
178         .supports_fw_dump = false,
179 };
180 
181 static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
182         .helper         = NULL,
183         .firmware       = "mrvl/sd8787_uapsta.bin",
184         .reg            = &btmrvl_reg_87xx,
185         .support_pscan_win_report = false,
186         .sd_blksz_fw_dl = 256,
187         .supports_fw_dump = false,
188 };
189 
190 static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
191         .helper         = NULL,
192         .firmware       = "mrvl/sd8797_uapsta.bin",
193         .reg            = &btmrvl_reg_87xx,
194         .support_pscan_win_report = false,
195         .sd_blksz_fw_dl = 256,
196         .supports_fw_dump = false,
197 };
198 
199 static const struct btmrvl_sdio_device btmrvl_sdio_sd8887 = {
200         .helper         = NULL,
201         .firmware       = "mrvl/sd8887_uapsta.bin",
202         .reg            = &btmrvl_reg_8887,
203         .support_pscan_win_report = true,
204         .sd_blksz_fw_dl = 256,
205         .supports_fw_dump = false,
206 };
207 
208 static const struct btmrvl_sdio_device btmrvl_sdio_sd8897 = {
209         .helper         = NULL,
210         .firmware       = "mrvl/sd8897_uapsta.bin",
211         .reg            = &btmrvl_reg_8897,
212         .support_pscan_win_report = true,
213         .sd_blksz_fw_dl = 256,
214         .supports_fw_dump = true,
215 };
216 
217 static const struct btmrvl_sdio_device btmrvl_sdio_sd8997 = {
218         .helper         = NULL,
219         .firmware       = "mrvl/sd8997_uapsta.bin",
220         .reg            = &btmrvl_reg_8997,
221         .support_pscan_win_report = true,
222         .sd_blksz_fw_dl = 256,
223         .supports_fw_dump = true,
224 };
225 
226 static const struct sdio_device_id btmrvl_sdio_ids[] = {
227         /* Marvell SD8688 Bluetooth device */
228         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
229                         .driver_data = (unsigned long)&btmrvl_sdio_sd8688 },
230         /* Marvell SD8787 Bluetooth device */
231         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
232                         .driver_data = (unsigned long)&btmrvl_sdio_sd8787 },
233         /* Marvell SD8787 Bluetooth AMP device */
234         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911B),
235                         .driver_data = (unsigned long)&btmrvl_sdio_sd8787 },
236         /* Marvell SD8797 Bluetooth device */
237         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A),
238                         .driver_data = (unsigned long)&btmrvl_sdio_sd8797 },
239         /* Marvell SD8887 Bluetooth device */
240         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9136),
241                         .driver_data = (unsigned long)&btmrvl_sdio_sd8887 },
242         /* Marvell SD8897 Bluetooth device */
243         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912E),
244                         .driver_data = (unsigned long)&btmrvl_sdio_sd8897 },
245         /* Marvell SD8997 Bluetooth device */
246         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9142),
247                         .driver_data = (unsigned long)&btmrvl_sdio_sd8997 },
248 
249         { }     /* Terminating entry */
250 };
251 
252 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
253 
254 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
255 {
256         u8 reg;
257         int ret;
258 
259         reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
260         if (!ret)
261                 card->rx_unit = reg;
262 
263         return ret;
264 }
265 
266 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
267 {
268         u8 fws0, fws1;
269         int ret;
270 
271         *dat = 0;
272 
273         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
274         if (ret)
275                 return -EIO;
276 
277         fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
278         if (ret)
279                 return -EIO;
280 
281         *dat = (((u16) fws1) << 8) | fws0;
282 
283         return 0;
284 }
285 
286 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
287 {
288         u8 reg;
289         int ret;
290 
291         reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
292         if (!ret)
293                 *dat = (u16) reg << card->rx_unit;
294 
295         return ret;
296 }
297 
298 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
299                                                                 u8 mask)
300 {
301         int ret;
302 
303         sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
304         if (ret) {
305                 BT_ERR("Unable to enable the host interrupt!");
306                 ret = -EIO;
307         }
308 
309         return ret;
310 }
311 
312 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
313                                                                 u8 mask)
314 {
315         u8 host_int_mask;
316         int ret;
317 
318         host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
319         if (ret)
320                 return -EIO;
321 
322         host_int_mask &= ~mask;
323 
324         sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
325         if (ret < 0) {
326                 BT_ERR("Unable to disable the host interrupt!");
327                 return -EIO;
328         }
329 
330         return 0;
331 }
332 
333 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
334 {
335         unsigned int tries;
336         u8 status;
337         int ret;
338 
339         for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
340                 status = sdio_readb(card->func, card->reg->card_status, &ret);
341                 if (ret)
342                         goto failed;
343                 if ((status & bits) == bits)
344                         return ret;
345 
346                 udelay(1);
347         }
348 
349         ret = -ETIMEDOUT;
350 
351 failed:
352         BT_ERR("FAILED! ret=%d", ret);
353 
354         return ret;
355 }
356 
357 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
358                                                                 int pollnum)
359 {
360         u16 firmwarestat;
361         int tries, ret;
362 
363          /* Wait for firmware to become ready */
364         for (tries = 0; tries < pollnum; tries++) {
365                 sdio_claim_host(card->func);
366                 ret = btmrvl_sdio_read_fw_status(card, &firmwarestat);
367                 sdio_release_host(card->func);
368                 if (ret < 0)
369                         continue;
370 
371                 if (firmwarestat == FIRMWARE_READY)
372                         return 0;
373 
374                 msleep(10);
375         }
376 
377         return -ETIMEDOUT;
378 }
379 
380 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
381 {
382         const struct firmware *fw_helper = NULL;
383         const u8 *helper = NULL;
384         int ret;
385         void *tmphlprbuf = NULL;
386         int tmphlprbufsz, hlprblknow, helperlen;
387         u8 *helperbuf;
388         u32 tx_len;
389 
390         ret = request_firmware(&fw_helper, card->helper,
391                                                 &card->func->dev);
392         if ((ret < 0) || !fw_helper) {
393                 BT_ERR("request_firmware(helper) failed, error code = %d",
394                                                                         ret);
395                 ret = -ENOENT;
396                 goto done;
397         }
398 
399         helper = fw_helper->data;
400         helperlen = fw_helper->size;
401 
402         BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
403                                                 helperlen, SDIO_BLOCK_SIZE);
404 
405         tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
406 
407         tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
408         if (!tmphlprbuf) {
409                 BT_ERR("Unable to allocate buffer for helper."
410                         " Terminating download");
411                 ret = -ENOMEM;
412                 goto done;
413         }
414 
415         helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
416 
417         /* Perform helper data transfer */
418         tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
419                         - SDIO_HEADER_LEN;
420         hlprblknow = 0;
421 
422         do {
423                 ret = btmrvl_sdio_poll_card_status(card,
424                                             CARD_IO_READY | DN_LD_CARD_RDY);
425                 if (ret < 0) {
426                         BT_ERR("Helper download poll status timeout @ %d",
427                                 hlprblknow);
428                         goto done;
429                 }
430 
431                 /* Check if there is more data? */
432                 if (hlprblknow >= helperlen)
433                         break;
434 
435                 if (helperlen - hlprblknow < tx_len)
436                         tx_len = helperlen - hlprblknow;
437 
438                 /* Little-endian */
439                 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
440                 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
441                 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
442                 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
443 
444                 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
445                                 tx_len);
446 
447                 /* Now send the data */
448                 ret = sdio_writesb(card->func, card->ioport, helperbuf,
449                                 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
450                 if (ret < 0) {
451                         BT_ERR("IO error during helper download @ %d",
452                                 hlprblknow);
453                         goto done;
454                 }
455 
456                 hlprblknow += tx_len;
457         } while (true);
458 
459         BT_DBG("Transferring helper image EOF block");
460 
461         memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
462 
463         ret = sdio_writesb(card->func, card->ioport, helperbuf,
464                                                         SDIO_BLOCK_SIZE);
465         if (ret < 0) {
466                 BT_ERR("IO error in writing helper image EOF block");
467                 goto done;
468         }
469 
470         ret = 0;
471 
472 done:
473         kfree(tmphlprbuf);
474         release_firmware(fw_helper);
475         return ret;
476 }
477 
478 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
479 {
480         const struct firmware *fw_firmware = NULL;
481         const u8 *firmware = NULL;
482         int firmwarelen, tmpfwbufsz, ret;
483         unsigned int tries, offset;
484         u8 base0, base1;
485         void *tmpfwbuf = NULL;
486         u8 *fwbuf;
487         u16 len, blksz_dl = card->sd_blksz_fw_dl;
488         int txlen = 0, tx_blocks = 0, count = 0;
489 
490         ret = request_firmware(&fw_firmware, card->firmware,
491                                                         &card->func->dev);
492         if ((ret < 0) || !fw_firmware) {
493                 BT_ERR("request_firmware(firmware) failed, error code = %d",
494                                                                         ret);
495                 ret = -ENOENT;
496                 goto done;
497         }
498 
499         firmware = fw_firmware->data;
500         firmwarelen = fw_firmware->size;
501 
502         BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
503 
504         tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
505         tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
506         if (!tmpfwbuf) {
507                 BT_ERR("Unable to allocate buffer for firmware."
508                        " Terminating download");
509                 ret = -ENOMEM;
510                 goto done;
511         }
512 
513         /* Ensure aligned firmware buffer */
514         fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
515 
516         /* Perform firmware data transfer */
517         offset = 0;
518         do {
519                 ret = btmrvl_sdio_poll_card_status(card,
520                                         CARD_IO_READY | DN_LD_CARD_RDY);
521                 if (ret < 0) {
522                         BT_ERR("FW download with helper poll status"
523                                                 " timeout @ %d", offset);
524                         goto done;
525                 }
526 
527                 /* Check if there is more data ? */
528                 if (offset >= firmwarelen)
529                         break;
530 
531                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
532                         base0 = sdio_readb(card->func,
533                                         card->reg->sq_read_base_addr_a0, &ret);
534                         if (ret) {
535                                 BT_ERR("BASE0 register read failed:"
536                                         " base0 = 0x%04X(%d)."
537                                         " Terminating download",
538                                         base0, base0);
539                                 ret = -EIO;
540                                 goto done;
541                         }
542                         base1 = sdio_readb(card->func,
543                                         card->reg->sq_read_base_addr_a1, &ret);
544                         if (ret) {
545                                 BT_ERR("BASE1 register read failed:"
546                                         " base1 = 0x%04X(%d)."
547                                         " Terminating download",
548                                         base1, base1);
549                                 ret = -EIO;
550                                 goto done;
551                         }
552 
553                         len = (((u16) base1) << 8) | base0;
554                         if (len)
555                                 break;
556 
557                         udelay(10);
558                 }
559 
560                 if (!len)
561                         break;
562                 else if (len > BTM_UPLD_SIZE) {
563                         BT_ERR("FW download failure @%d, invalid length %d",
564                                                                 offset, len);
565                         ret = -EINVAL;
566                         goto done;
567                 }
568 
569                 txlen = len;
570 
571                 if (len & BIT(0)) {
572                         count++;
573                         if (count > MAX_WRITE_IOMEM_RETRY) {
574                                 BT_ERR("FW download failure @%d, "
575                                         "over max retry count", offset);
576                                 ret = -EIO;
577                                 goto done;
578                         }
579                         BT_ERR("FW CRC error indicated by the helper: "
580                                 "len = 0x%04X, txlen = %d", len, txlen);
581                         len &= ~BIT(0);
582                         /* Set txlen to 0 so as to resend from same offset */
583                         txlen = 0;
584                 } else {
585                         count = 0;
586 
587                         /* Last block ? */
588                         if (firmwarelen - offset < txlen)
589                                 txlen = firmwarelen - offset;
590 
591                         tx_blocks = DIV_ROUND_UP(txlen, blksz_dl);
592 
593                         memcpy(fwbuf, &firmware[offset], txlen);
594                 }
595 
596                 ret = sdio_writesb(card->func, card->ioport, fwbuf,
597                                                 tx_blocks * blksz_dl);
598 
599                 if (ret < 0) {
600                         BT_ERR("FW download, writesb(%d) failed @%d",
601                                                         count, offset);
602                         sdio_writeb(card->func, HOST_CMD53_FIN,
603                                                 card->reg->cfg, &ret);
604                         if (ret)
605                                 BT_ERR("writeb failed (CFG)");
606                 }
607 
608                 offset += txlen;
609         } while (true);
610 
611         BT_INFO("FW download over, size %d bytes", offset);
612 
613         ret = 0;
614 
615 done:
616         kfree(tmpfwbuf);
617         release_firmware(fw_firmware);
618         return ret;
619 }
620 
621 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
622 {
623         u16 buf_len = 0;
624         int ret, num_blocks, blksz;
625         struct sk_buff *skb = NULL;
626         u32 type;
627         u8 *payload = NULL;
628         struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
629         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
630 
631         if (!card || !card->func) {
632                 BT_ERR("card or function is NULL!");
633                 ret = -EINVAL;
634                 goto exit;
635         }
636 
637         /* Read the length of data to be transferred */
638         ret = btmrvl_sdio_read_rx_len(card, &buf_len);
639         if (ret < 0) {
640                 BT_ERR("read rx_len failed");
641                 ret = -EIO;
642                 goto exit;
643         }
644 
645         blksz = SDIO_BLOCK_SIZE;
646         num_blocks = DIV_ROUND_UP(buf_len, blksz);
647 
648         if (buf_len <= SDIO_HEADER_LEN
649             || (num_blocks * blksz) > ALLOC_BUF_SIZE) {
650                 BT_ERR("invalid packet length: %d", buf_len);
651                 ret = -EINVAL;
652                 goto exit;
653         }
654 
655         /* Allocate buffer */
656         skb = bt_skb_alloc(num_blocks * blksz + BTSDIO_DMA_ALIGN, GFP_ATOMIC);
657         if (!skb) {
658                 BT_ERR("No free skb");
659                 ret = -ENOMEM;
660                 goto exit;
661         }
662 
663         if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
664                 skb_put(skb, (unsigned long) skb->data &
665                                         (BTSDIO_DMA_ALIGN - 1));
666                 skb_pull(skb, (unsigned long) skb->data &
667                                         (BTSDIO_DMA_ALIGN - 1));
668         }
669 
670         payload = skb->data;
671 
672         ret = sdio_readsb(card->func, payload, card->ioport,
673                           num_blocks * blksz);
674         if (ret < 0) {
675                 BT_ERR("readsb failed: %d", ret);
676                 ret = -EIO;
677                 goto exit;
678         }
679 
680         /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
681          * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
682          */
683 
684         buf_len = payload[0];
685         buf_len |= payload[1] << 8;
686         buf_len |= payload[2] << 16;
687 
688         if (buf_len > blksz * num_blocks) {
689                 BT_ERR("Skip incorrect packet: hdrlen %d buffer %d",
690                        buf_len, blksz * num_blocks);
691                 ret = -EIO;
692                 goto exit;
693         }
694 
695         type = payload[3];
696 
697         switch (type) {
698         case HCI_ACLDATA_PKT:
699         case HCI_SCODATA_PKT:
700         case HCI_EVENT_PKT:
701                 bt_cb(skb)->pkt_type = type;
702                 skb_put(skb, buf_len);
703                 skb_pull(skb, SDIO_HEADER_LEN);
704 
705                 if (type == HCI_EVENT_PKT) {
706                         if (btmrvl_check_evtpkt(priv, skb))
707                                 hci_recv_frame(hdev, skb);
708                 } else {
709                         hci_recv_frame(hdev, skb);
710                 }
711 
712                 hdev->stat.byte_rx += buf_len;
713                 break;
714 
715         case MRVL_VENDOR_PKT:
716                 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
717                 skb_put(skb, buf_len);
718                 skb_pull(skb, SDIO_HEADER_LEN);
719 
720                 if (btmrvl_process_event(priv, skb))
721                         hci_recv_frame(hdev, skb);
722 
723                 hdev->stat.byte_rx += buf_len;
724                 break;
725 
726         default:
727                 BT_ERR("Unknown packet type:%d", type);
728                 BT_ERR("hex: %*ph", blksz * num_blocks, payload);
729 
730                 kfree_skb(skb);
731                 skb = NULL;
732                 break;
733         }
734 
735 exit:
736         if (ret) {
737                 hdev->stat.err_rx++;
738                 kfree_skb(skb);
739         }
740 
741         return ret;
742 }
743 
744 static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
745 {
746         ulong flags;
747         u8 ireg;
748         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
749 
750         spin_lock_irqsave(&priv->driver_lock, flags);
751         ireg = sdio_ireg;
752         sdio_ireg = 0;
753         spin_unlock_irqrestore(&priv->driver_lock, flags);
754 
755         sdio_claim_host(card->func);
756         if (ireg & DN_LD_HOST_INT_STATUS) {
757                 if (priv->btmrvl_dev.tx_dnld_rdy)
758                         BT_DBG("tx_done already received: "
759                                 " int_status=0x%x", ireg);
760                 else
761                         priv->btmrvl_dev.tx_dnld_rdy = true;
762         }
763 
764         if (ireg & UP_LD_HOST_INT_STATUS)
765                 btmrvl_sdio_card_to_host(priv);
766 
767         sdio_release_host(card->func);
768 
769         return 0;
770 }
771 
772 static int btmrvl_sdio_read_to_clear(struct btmrvl_sdio_card *card, u8 *ireg)
773 {
774         struct btmrvl_adapter *adapter = card->priv->adapter;
775         int ret;
776 
777         ret = sdio_readsb(card->func, adapter->hw_regs, 0, SDIO_BLOCK_SIZE);
778         if (ret) {
779                 BT_ERR("sdio_readsb: read int hw_regs failed: %d", ret);
780                 return ret;
781         }
782 
783         *ireg = adapter->hw_regs[card->reg->host_intstatus];
784         BT_DBG("hw_regs[%#x]=%#x", card->reg->host_intstatus, *ireg);
785 
786         return 0;
787 }
788 
789 static int btmrvl_sdio_write_to_clear(struct btmrvl_sdio_card *card, u8 *ireg)
790 {
791         int ret;
792 
793         *ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
794         if (ret) {
795                 BT_ERR("sdio_readb: read int status failed: %d", ret);
796                 return ret;
797         }
798 
799         if (*ireg) {
800                 /*
801                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
802                  * Clear the interrupt status register and re-enable the
803                  * interrupt.
804                  */
805                 BT_DBG("int_status = 0x%x", *ireg);
806 
807                 sdio_writeb(card->func, ~(*ireg) & (DN_LD_HOST_INT_STATUS |
808                                                     UP_LD_HOST_INT_STATUS),
809                             card->reg->host_intstatus, &ret);
810                 if (ret) {
811                         BT_ERR("sdio_writeb: clear int status failed: %d", ret);
812                         return ret;
813                 }
814         }
815 
816         return 0;
817 }
818 
819 static void btmrvl_sdio_interrupt(struct sdio_func *func)
820 {
821         struct btmrvl_private *priv;
822         struct btmrvl_sdio_card *card;
823         ulong flags;
824         u8 ireg = 0;
825         int ret;
826 
827         card = sdio_get_drvdata(func);
828         if (!card || !card->priv) {
829                 BT_ERR("sbi_interrupt(%p) card or priv is NULL, card=%p",
830                        func, card);
831                 return;
832         }
833 
834         priv = card->priv;
835 
836         if (priv->surprise_removed)
837                 return;
838 
839         if (card->reg->int_read_to_clear)
840                 ret = btmrvl_sdio_read_to_clear(card, &ireg);
841         else
842                 ret = btmrvl_sdio_write_to_clear(card, &ireg);
843 
844         if (ret)
845                 return;
846 
847         spin_lock_irqsave(&priv->driver_lock, flags);
848         sdio_ireg |= ireg;
849         spin_unlock_irqrestore(&priv->driver_lock, flags);
850 
851         btmrvl_interrupt(priv);
852 }
853 
854 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
855 {
856         struct sdio_func *func;
857         u8 reg;
858         int ret = 0;
859 
860         if (!card || !card->func) {
861                 BT_ERR("Error: card or function is NULL!");
862                 ret = -EINVAL;
863                 goto failed;
864         }
865 
866         func = card->func;
867 
868         sdio_claim_host(func);
869 
870         ret = sdio_enable_func(func);
871         if (ret) {
872                 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
873                 ret = -EIO;
874                 goto release_host;
875         }
876 
877         ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
878         if (ret) {
879                 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
880                 ret = -EIO;
881                 goto disable_func;
882         }
883 
884         ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
885         if (ret) {
886                 BT_ERR("cannot set SDIO block size");
887                 ret = -EIO;
888                 goto release_irq;
889         }
890 
891         reg = sdio_readb(func, card->reg->io_port_0, &ret);
892         if (ret < 0) {
893                 ret = -EIO;
894                 goto release_irq;
895         }
896 
897         card->ioport = reg;
898 
899         reg = sdio_readb(func, card->reg->io_port_1, &ret);
900         if (ret < 0) {
901                 ret = -EIO;
902                 goto release_irq;
903         }
904 
905         card->ioport |= (reg << 8);
906 
907         reg = sdio_readb(func, card->reg->io_port_2, &ret);
908         if (ret < 0) {
909                 ret = -EIO;
910                 goto release_irq;
911         }
912 
913         card->ioport |= (reg << 16);
914 
915         BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
916 
917         if (card->reg->int_read_to_clear) {
918                 reg = sdio_readb(func, card->reg->host_int_rsr, &ret);
919                 if (ret < 0) {
920                         ret = -EIO;
921                         goto release_irq;
922                 }
923                 sdio_writeb(func, reg | 0x3f, card->reg->host_int_rsr, &ret);
924                 if (ret < 0) {
925                         ret = -EIO;
926                         goto release_irq;
927                 }
928 
929                 reg = sdio_readb(func, card->reg->card_misc_cfg, &ret);
930                 if (ret < 0) {
931                         ret = -EIO;
932                         goto release_irq;
933                 }
934                 sdio_writeb(func, reg | 0x10, card->reg->card_misc_cfg, &ret);
935                 if (ret < 0) {
936                         ret = -EIO;
937                         goto release_irq;
938                 }
939         }
940 
941         sdio_set_drvdata(func, card);
942 
943         sdio_release_host(func);
944 
945         return 0;
946 
947 release_irq:
948         sdio_release_irq(func);
949 
950 disable_func:
951         sdio_disable_func(func);
952 
953 release_host:
954         sdio_release_host(func);
955 
956 failed:
957         return ret;
958 }
959 
960 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
961 {
962         if (card && card->func) {
963                 sdio_claim_host(card->func);
964                 sdio_release_irq(card->func);
965                 sdio_disable_func(card->func);
966                 sdio_release_host(card->func);
967                 sdio_set_drvdata(card->func, NULL);
968         }
969 
970         return 0;
971 }
972 
973 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
974 {
975         int ret;
976 
977         if (!card || !card->func)
978                 return -EINVAL;
979 
980         sdio_claim_host(card->func);
981 
982         ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
983 
984         btmrvl_sdio_get_rx_unit(card);
985 
986         sdio_release_host(card->func);
987 
988         return ret;
989 }
990 
991 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
992 {
993         int ret;
994 
995         if (!card || !card->func)
996                 return -EINVAL;
997 
998         sdio_claim_host(card->func);
999 
1000         ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
1001 
1002         sdio_release_host(card->func);
1003 
1004         return ret;
1005 }
1006 
1007 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
1008                                 u8 *payload, u16 nb)
1009 {
1010         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1011         int ret = 0;
1012         int buf_block_len;
1013         int blksz;
1014         int i = 0;
1015         u8 *buf = NULL;
1016         void *tmpbuf = NULL;
1017         int tmpbufsz;
1018 
1019         if (!card || !card->func) {
1020                 BT_ERR("card or function is NULL!");
1021                 return -EINVAL;
1022         }
1023 
1024         buf = payload;
1025         if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
1026                 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
1027                 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
1028                 if (!tmpbuf)
1029                         return -ENOMEM;
1030                 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
1031                 memcpy(buf, payload, nb);
1032         }
1033 
1034         blksz = SDIO_BLOCK_SIZE;
1035         buf_block_len = DIV_ROUND_UP(nb, blksz);
1036 
1037         sdio_claim_host(card->func);
1038 
1039         do {
1040                 /* Transfer data to card */
1041                 ret = sdio_writesb(card->func, card->ioport, buf,
1042                                    buf_block_len * blksz);
1043                 if (ret < 0) {
1044                         i++;
1045                         BT_ERR("i=%d writesb failed: %d", i, ret);
1046                         BT_ERR("hex: %*ph", nb, payload);
1047                         ret = -EIO;
1048                         if (i > MAX_WRITE_IOMEM_RETRY)
1049                                 goto exit;
1050                 }
1051         } while (ret);
1052 
1053         priv->btmrvl_dev.tx_dnld_rdy = false;
1054 
1055 exit:
1056         sdio_release_host(card->func);
1057         kfree(tmpbuf);
1058 
1059         return ret;
1060 }
1061 
1062 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
1063 {
1064         int ret;
1065         u8 fws0;
1066         int pollnum = MAX_POLL_TRIES;
1067 
1068         if (!card || !card->func) {
1069                 BT_ERR("card or function is NULL!");
1070                 return -EINVAL;
1071         }
1072 
1073         if (!btmrvl_sdio_verify_fw_download(card, 1)) {
1074                 BT_DBG("Firmware already downloaded!");
1075                 return 0;
1076         }
1077 
1078         sdio_claim_host(card->func);
1079 
1080         /* Check if other function driver is downloading the firmware */
1081         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
1082         if (ret) {
1083                 BT_ERR("Failed to read FW downloading status!");
1084                 ret = -EIO;
1085                 goto done;
1086         }
1087         if (fws0) {
1088                 BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
1089 
1090                 /* Give other function more time to download the firmware */
1091                 pollnum *= 10;
1092         } else {
1093                 if (card->helper) {
1094                         ret = btmrvl_sdio_download_helper(card);
1095                         if (ret) {
1096                                 BT_ERR("Failed to download helper!");
1097                                 ret = -EIO;
1098                                 goto done;
1099                         }
1100                 }
1101 
1102                 if (btmrvl_sdio_download_fw_w_helper(card)) {
1103                         BT_ERR("Failed to download firmware!");
1104                         ret = -EIO;
1105                         goto done;
1106                 }
1107         }
1108 
1109         /*
1110          * winner or not, with this test the FW synchronizes when the
1111          * module can continue its initialization
1112          */
1113         if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
1114                 BT_ERR("FW failed to be active in time!");
1115                 return -ETIMEDOUT;
1116         }
1117 
1118         sdio_release_host(card->func);
1119 
1120         return 0;
1121 
1122 done:
1123         sdio_release_host(card->func);
1124         return ret;
1125 }
1126 
1127 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
1128 {
1129         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1130         int ret = 0;
1131 
1132         if (!card || !card->func) {
1133                 BT_ERR("card or function is NULL!");
1134                 return -EINVAL;
1135         }
1136 
1137         sdio_claim_host(card->func);
1138 
1139         sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
1140 
1141         sdio_release_host(card->func);
1142 
1143         BT_DBG("wake up firmware");
1144 
1145         return ret;
1146 }
1147 
1148 static void btmrvl_sdio_dump_regs(struct btmrvl_private *priv)
1149 {
1150         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1151         int ret = 0;
1152         unsigned int reg, reg_start, reg_end;
1153         char buf[256], *ptr;
1154         u8 loop, func, data;
1155         int MAX_LOOP = 2;
1156 
1157         btmrvl_sdio_wakeup_fw(priv);
1158         sdio_claim_host(card->func);
1159 
1160         for (loop = 0; loop < MAX_LOOP; loop++) {
1161                 memset(buf, 0, sizeof(buf));
1162                 ptr = buf;
1163 
1164                 if (loop == 0) {
1165                         /* Read the registers of SDIO function0 */
1166                         func = loop;
1167                         reg_start = 0;
1168                         reg_end = 9;
1169                 } else {
1170                         func = 2;
1171                         reg_start = 0;
1172                         reg_end = 0x09;
1173                 }
1174 
1175                 ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ",
1176                                func, reg_start, reg_end);
1177                 for (reg = reg_start; reg <= reg_end; reg++) {
1178                         if (func == 0)
1179                                 data = sdio_f0_readb(card->func, reg, &ret);
1180                         else
1181                                 data = sdio_readb(card->func, reg, &ret);
1182 
1183                         if (!ret) {
1184                                 ptr += sprintf(ptr, "%02x ", data);
1185                         } else {
1186                                 ptr += sprintf(ptr, "ERR");
1187                                 break;
1188                         }
1189                 }
1190 
1191                 BT_INFO("%s", buf);
1192         }
1193 
1194         sdio_release_host(card->func);
1195 }
1196 
1197 /* This function read/write firmware */
1198 static enum
1199 rdwr_status btmrvl_sdio_rdwr_firmware(struct btmrvl_private *priv,
1200                                       u8 doneflag)
1201 {
1202         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1203         int ret, tries;
1204         u8 ctrl_data = 0;
1205 
1206         sdio_writeb(card->func, FW_DUMP_HOST_READY, card->reg->fw_dump_ctrl,
1207                     &ret);
1208 
1209         if (ret) {
1210                 BT_ERR("SDIO write err");
1211                 return RDWR_STATUS_FAILURE;
1212         }
1213 
1214         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
1215                 ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
1216                                        &ret);
1217 
1218                 if (ret) {
1219                         BT_ERR("SDIO read err");
1220                         return RDWR_STATUS_FAILURE;
1221                 }
1222 
1223                 if (ctrl_data == FW_DUMP_DONE)
1224                         break;
1225                 if (doneflag && ctrl_data == doneflag)
1226                         return RDWR_STATUS_DONE;
1227                 if (ctrl_data != FW_DUMP_HOST_READY) {
1228                         BT_INFO("The ctrl reg was changed, re-try again!");
1229                         sdio_writeb(card->func, FW_DUMP_HOST_READY,
1230                                     card->reg->fw_dump_ctrl, &ret);
1231                         if (ret) {
1232                                 BT_ERR("SDIO write err");
1233                                 return RDWR_STATUS_FAILURE;
1234                         }
1235                 }
1236                 usleep_range(100, 200);
1237         }
1238 
1239         if (ctrl_data == FW_DUMP_HOST_READY) {
1240                 BT_ERR("Fail to pull ctrl_data");
1241                 return RDWR_STATUS_FAILURE;
1242         }
1243 
1244         return RDWR_STATUS_SUCCESS;
1245 }
1246 
1247 /* This function dump sdio register and memory data */
1248 static void btmrvl_sdio_dump_firmware(struct btmrvl_private *priv)
1249 {
1250         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
1251         int ret = 0;
1252         unsigned int reg, reg_start, reg_end;
1253         enum rdwr_status stat;
1254         u8 *dbg_ptr, *end_ptr, *fw_dump_data, *fw_dump_ptr;
1255         u8 dump_num = 0, idx, i, read_reg, doneflag = 0;
1256         u32 memory_size, fw_dump_len = 0;
1257 
1258         /* dump sdio register first */
1259         btmrvl_sdio_dump_regs(priv);
1260 
1261         if (!card->supports_fw_dump) {
1262                 BT_ERR("Firmware dump not supported for this card!");
1263                 return;
1264         }
1265 
1266         for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
1267                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
1268 
1269                 if (entry->mem_ptr) {
1270                         vfree(entry->mem_ptr);
1271                         entry->mem_ptr = NULL;
1272                 }
1273                 entry->mem_size = 0;
1274         }
1275 
1276         btmrvl_sdio_wakeup_fw(priv);
1277         sdio_claim_host(card->func);
1278 
1279         BT_INFO("== btmrvl firmware dump start ==");
1280 
1281         stat = btmrvl_sdio_rdwr_firmware(priv, doneflag);
1282         if (stat == RDWR_STATUS_FAILURE)
1283                 goto done;
1284 
1285         reg = card->reg->fw_dump_start;
1286         /* Read the number of the memories which will dump */
1287         dump_num = sdio_readb(card->func, reg, &ret);
1288 
1289         if (ret) {
1290                 BT_ERR("SDIO read memory length err");
1291                 goto done;
1292         }
1293 
1294         /* Read the length of every memory which will dump */
1295         for (idx = 0; idx < dump_num; idx++) {
1296                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
1297 
1298                 stat = btmrvl_sdio_rdwr_firmware(priv, doneflag);
1299                 if (stat == RDWR_STATUS_FAILURE)
1300                         goto done;
1301 
1302                 memory_size = 0;
1303                 reg = card->reg->fw_dump_start;
1304                 for (i = 0; i < 4; i++) {
1305                         read_reg = sdio_readb(card->func, reg, &ret);
1306                         if (ret) {
1307                                 BT_ERR("SDIO read err");
1308                                 goto done;
1309                         }
1310                         memory_size |= (read_reg << i*8);
1311                         reg++;
1312                 }
1313 
1314                 if (memory_size == 0) {
1315                         BT_INFO("Firmware dump finished!");
1316                         sdio_writeb(card->func, FW_DUMP_READ_DONE,
1317                                     card->reg->fw_dump_ctrl, &ret);
1318                         if (ret) {
1319                                 BT_ERR("SDIO Write MEMDUMP_FINISH ERR");
1320                                 goto done;
1321                         }
1322                         break;
1323                 }
1324 
1325                 BT_INFO("%s_SIZE=0x%x", entry->mem_name, memory_size);
1326                 entry->mem_ptr = vzalloc(memory_size + 1);
1327                 entry->mem_size = memory_size;
1328                 if (!entry->mem_ptr) {
1329                         BT_ERR("Vzalloc %s failed", entry->mem_name);
1330                         goto done;
1331                 }
1332 
1333                 fw_dump_len += (strlen("========Start dump ") +
1334                                 strlen(entry->mem_name) +
1335                                 strlen("========\n") +
1336                                 (memory_size + 1) +
1337                                 strlen("\n========End dump========\n"));
1338 
1339                 dbg_ptr = entry->mem_ptr;
1340                 end_ptr = dbg_ptr + memory_size;
1341 
1342                 doneflag = entry->done_flag;
1343                 BT_INFO("Start %s output, please wait...",
1344                         entry->mem_name);
1345 
1346                 do {
1347                         stat = btmrvl_sdio_rdwr_firmware(priv, doneflag);
1348                         if (stat == RDWR_STATUS_FAILURE)
1349                                 goto done;
1350 
1351                         reg_start = card->reg->fw_dump_start;
1352                         reg_end = card->reg->fw_dump_end;
1353                         for (reg = reg_start; reg <= reg_end; reg++) {
1354                                 *dbg_ptr = sdio_readb(card->func, reg, &ret);
1355                                 if (ret) {
1356                                         BT_ERR("SDIO read err");
1357                                         goto done;
1358                                 }
1359                                 if (dbg_ptr < end_ptr)
1360                                         dbg_ptr++;
1361                                 else
1362                                         BT_ERR("Allocated buffer not enough");
1363                         }
1364 
1365                         if (stat != RDWR_STATUS_DONE) {
1366                                 continue;
1367                         } else {
1368                                 BT_INFO("%s done: size=0x%tx",
1369                                         entry->mem_name,
1370                                         dbg_ptr - entry->mem_ptr);
1371                                 break;
1372                         }
1373                 } while (1);
1374         }
1375 
1376         BT_INFO("== btmrvl firmware dump end ==");
1377 
1378 done:
1379         sdio_release_host(card->func);
1380 
1381         if (fw_dump_len == 0)
1382                 return;
1383 
1384         fw_dump_data = vzalloc(fw_dump_len+1);
1385         if (!fw_dump_data) {
1386                 BT_ERR("Vzalloc fw_dump_data fail!");
1387                 return;
1388         }
1389         fw_dump_ptr = fw_dump_data;
1390 
1391         /* Dump all the memory data into single file, a userspace script will
1392            be used to split all the memory data to multiple files*/
1393         BT_INFO("== btmrvl firmware dump to /sys/class/devcoredump start");
1394         for (idx = 0; idx < dump_num; idx++) {
1395                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
1396 
1397                 if (entry->mem_ptr) {
1398                         strcpy(fw_dump_ptr, "========Start dump ");
1399                         fw_dump_ptr += strlen("========Start dump ");
1400 
1401                         strcpy(fw_dump_ptr, entry->mem_name);
1402                         fw_dump_ptr += strlen(entry->mem_name);
1403 
1404                         strcpy(fw_dump_ptr, "========\n");
1405                         fw_dump_ptr += strlen("========\n");
1406 
1407                         memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
1408                         fw_dump_ptr += entry->mem_size;
1409 
1410                         strcpy(fw_dump_ptr, "\n========End dump========\n");
1411                         fw_dump_ptr += strlen("\n========End dump========\n");
1412 
1413                         vfree(mem_type_mapping_tbl[idx].mem_ptr);
1414                         mem_type_mapping_tbl[idx].mem_ptr = NULL;
1415                 }
1416         }
1417 
1418         /* fw_dump_data will be free in device coredump release function
1419            after 5 min*/
1420         dev_coredumpv(&card->func->dev, fw_dump_data, fw_dump_len, GFP_KERNEL);
1421         BT_INFO("== btmrvl firmware dump to /sys/class/devcoredump end");
1422 }
1423 
1424 static int btmrvl_sdio_probe(struct sdio_func *func,
1425                                         const struct sdio_device_id *id)
1426 {
1427         int ret = 0;
1428         struct btmrvl_private *priv = NULL;
1429         struct btmrvl_sdio_card *card = NULL;
1430 
1431         BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
1432                         id->vendor, id->device, id->class, func->num);
1433 
1434         card = devm_kzalloc(&func->dev, sizeof(*card), GFP_KERNEL);
1435         if (!card)
1436                 return -ENOMEM;
1437 
1438         card->func = func;
1439 
1440         if (id->driver_data) {
1441                 struct btmrvl_sdio_device *data = (void *) id->driver_data;
1442                 card->helper = data->helper;
1443                 card->firmware = data->firmware;
1444                 card->reg = data->reg;
1445                 card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
1446                 card->support_pscan_win_report = data->support_pscan_win_report;
1447                 card->supports_fw_dump = data->supports_fw_dump;
1448         }
1449 
1450         if (btmrvl_sdio_register_dev(card) < 0) {
1451                 BT_ERR("Failed to register BT device!");
1452                 return -ENODEV;
1453         }
1454 
1455         /* Disable the interrupts on the card */
1456         btmrvl_sdio_disable_host_int(card);
1457 
1458         if (btmrvl_sdio_download_fw(card)) {
1459                 BT_ERR("Downloading firmware failed!");
1460                 ret = -ENODEV;
1461                 goto unreg_dev;
1462         }
1463 
1464         btmrvl_sdio_enable_host_int(card);
1465 
1466         priv = btmrvl_add_card(card);
1467         if (!priv) {
1468                 BT_ERR("Initializing card failed!");
1469                 ret = -ENODEV;
1470                 goto disable_host_int;
1471         }
1472 
1473         card->priv = priv;
1474 
1475         /* Initialize the interface specific function pointers */
1476         priv->hw_host_to_card = btmrvl_sdio_host_to_card;
1477         priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
1478         priv->hw_process_int_status = btmrvl_sdio_process_int_status;
1479         priv->firmware_dump = btmrvl_sdio_dump_firmware;
1480 
1481         if (btmrvl_register_hdev(priv)) {
1482                 BT_ERR("Register hdev failed!");
1483                 ret = -ENODEV;
1484                 goto disable_host_int;
1485         }
1486 
1487         return 0;
1488 
1489 disable_host_int:
1490         btmrvl_sdio_disable_host_int(card);
1491 unreg_dev:
1492         btmrvl_sdio_unregister_dev(card);
1493         return ret;
1494 }
1495 
1496 static void btmrvl_sdio_remove(struct sdio_func *func)
1497 {
1498         struct btmrvl_sdio_card *card;
1499 
1500         if (func) {
1501                 card = sdio_get_drvdata(func);
1502                 if (card) {
1503                         /* Send SHUTDOWN command & disable interrupt
1504                          * if user removes the module.
1505                          */
1506                         if (user_rmmod) {
1507                                 btmrvl_send_module_cfg_cmd(card->priv,
1508                                                         MODULE_SHUTDOWN_REQ);
1509                                 btmrvl_sdio_disable_host_int(card);
1510                         }
1511                         BT_DBG("unregester dev");
1512                         card->priv->surprise_removed = true;
1513                         btmrvl_sdio_unregister_dev(card);
1514                         btmrvl_remove_card(card->priv);
1515                 }
1516         }
1517 }
1518 
1519 static int btmrvl_sdio_suspend(struct device *dev)
1520 {
1521         struct sdio_func *func = dev_to_sdio_func(dev);
1522         struct btmrvl_sdio_card *card;
1523         struct btmrvl_private *priv;
1524         mmc_pm_flag_t pm_flags;
1525         struct hci_dev *hcidev;
1526 
1527         if (func) {
1528                 pm_flags = sdio_get_host_pm_caps(func);
1529                 BT_DBG("%s: suspend: PM flags = 0x%x", sdio_func_id(func),
1530                        pm_flags);
1531                 if (!(pm_flags & MMC_PM_KEEP_POWER)) {
1532                         BT_ERR("%s: cannot remain alive while suspended",
1533                                sdio_func_id(func));
1534                         return -ENOSYS;
1535                 }
1536                 card = sdio_get_drvdata(func);
1537                 if (!card || !card->priv) {
1538                         BT_ERR("card or priv structure is not valid");
1539                         return 0;
1540                 }
1541         } else {
1542                 BT_ERR("sdio_func is not specified");
1543                 return 0;
1544         }
1545 
1546         priv = card->priv;
1547         hcidev = priv->btmrvl_dev.hcidev;
1548         BT_DBG("%s: SDIO suspend", hcidev->name);
1549         hci_suspend_dev(hcidev);
1550         skb_queue_purge(&priv->adapter->tx_queue);
1551 
1552         if (priv->adapter->hs_state != HS_ACTIVATED) {
1553                 if (btmrvl_enable_hs(priv)) {
1554                         BT_ERR("HS not actived, suspend failed!");
1555                         return -EBUSY;
1556                 }
1557         }
1558 
1559         priv->adapter->is_suspended = true;
1560 
1561         /* We will keep the power when hs enabled successfully */
1562         if (priv->adapter->hs_state == HS_ACTIVATED) {
1563                 BT_DBG("suspend with MMC_PM_KEEP_POWER");
1564                 return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1565         } else {
1566                 BT_DBG("suspend without MMC_PM_KEEP_POWER");
1567                 return 0;
1568         }
1569 }
1570 
1571 static int btmrvl_sdio_resume(struct device *dev)
1572 {
1573         struct sdio_func *func = dev_to_sdio_func(dev);
1574         struct btmrvl_sdio_card *card;
1575         struct btmrvl_private *priv;
1576         mmc_pm_flag_t pm_flags;
1577         struct hci_dev *hcidev;
1578 
1579         if (func) {
1580                 pm_flags = sdio_get_host_pm_caps(func);
1581                 BT_DBG("%s: resume: PM flags = 0x%x", sdio_func_id(func),
1582                        pm_flags);
1583                 card = sdio_get_drvdata(func);
1584                 if (!card || !card->priv) {
1585                         BT_ERR("card or priv structure is not valid");
1586                         return 0;
1587                 }
1588         } else {
1589                 BT_ERR("sdio_func is not specified");
1590                 return 0;
1591         }
1592         priv = card->priv;
1593 
1594         if (!priv->adapter->is_suspended) {
1595                 BT_DBG("device already resumed");
1596                 return 0;
1597         }
1598 
1599         priv->hw_wakeup_firmware(priv);
1600         priv->adapter->hs_state = HS_DEACTIVATED;
1601         hcidev = priv->btmrvl_dev.hcidev;
1602         BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name);
1603         priv->adapter->is_suspended = false;
1604         BT_DBG("%s: SDIO resume", hcidev->name);
1605         hci_resume_dev(hcidev);
1606 
1607         return 0;
1608 }
1609 
1610 static const struct dev_pm_ops btmrvl_sdio_pm_ops = {
1611         .suspend        = btmrvl_sdio_suspend,
1612         .resume         = btmrvl_sdio_resume,
1613 };
1614 
1615 static struct sdio_driver bt_mrvl_sdio = {
1616         .name           = "btmrvl_sdio",
1617         .id_table       = btmrvl_sdio_ids,
1618         .probe          = btmrvl_sdio_probe,
1619         .remove         = btmrvl_sdio_remove,
1620         .drv = {
1621                 .owner = THIS_MODULE,
1622                 .pm = &btmrvl_sdio_pm_ops,
1623         }
1624 };
1625 
1626 static int __init btmrvl_sdio_init_module(void)
1627 {
1628         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1629                 BT_ERR("SDIO Driver Registration Failed");
1630                 return -ENODEV;
1631         }
1632 
1633         /* Clear the flag in case user removes the card. */
1634         user_rmmod = 0;
1635 
1636         return 0;
1637 }
1638 
1639 static void __exit btmrvl_sdio_exit_module(void)
1640 {
1641         /* Set the flag as user is removing this module. */
1642         user_rmmod = 1;
1643 
1644         sdio_unregister_driver(&bt_mrvl_sdio);
1645 }
1646 
1647 module_init(btmrvl_sdio_init_module);
1648 module_exit(btmrvl_sdio_exit_module);
1649 
1650 MODULE_AUTHOR("Marvell International Ltd.");
1651 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1652 MODULE_VERSION(VERSION);
1653 MODULE_LICENSE("GPL v2");
1654 MODULE_FIRMWARE("mrvl/sd8688_helper.bin");
1655 MODULE_FIRMWARE("mrvl/sd8688.bin");
1656 MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
1657 MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");
1658 MODULE_FIRMWARE("mrvl/sd8887_uapsta.bin");
1659 MODULE_FIRMWARE("mrvl/sd8897_uapsta.bin");
1660 MODULE_FIRMWARE("mrvl/sd8997_uapsta.bin");
1661 

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