drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <linux/types.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/mmc/sdio.h>
  19 #include <linux/mmc/core.h>
  20 #include <linux/mmc/sdio_func.h>
  21 #include <linux/mmc/sdio_ids.h>
  22 #include <linux/mmc/card.h>
  23 #include <linux/suspend.h>
  24 #include <linux/errno.h>
  25 #include <linux/sched.h>        /* request_irq() */
  26 #include <linux/module.h>
  27 #include <net/cfg80211.h>
  28
  29 #include <defs.h>
  30 #include <brcm_hw_ids.h>
  31 #include <brcmu_utils.h>
  32 #include <brcmu_wifi.h>
  33 #include "sdio_host.h"
  34 #include "dhd_dbg.h"
  35 #include "dhd_bus.h"
  36
  37 #define SDIO_VENDOR_ID_BROADCOM         0x02d0
  38
  39 #define DMA_ALIGN_MASK  0x03
  40
  41 #define SDIO_DEVICE_ID_BROADCOM_4329    0x4329
  42 #define SDIO_DEVICE_ID_BROADCOM_4330    0x4330
  43
  44 #define SDIO_FUNC1_BLOCKSIZE            64
  45 #define SDIO_FUNC2_BLOCKSIZE            512
  46
  47 /* devices we support, null terminated */
  48 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
  49         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
  50         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)},
  51         { /* end: all zeroes */ },
  52 };
  53 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
  54
  55 static bool
  56 brcmf_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
  57 {
  58         bool is_err = false;
  59 #ifdef CONFIG_PM_SLEEP
  60         is_err = atomic_read(&sdiodev->suspend);
  61 #endif
  62         return is_err;
  63 }
  64
  65 static void
  66 brcmf_pm_resume_wait(struct brcmf_sdio_dev *sdiodev, wait_queue_head_t *wq)
  67 {
  68 #ifdef CONFIG_PM_SLEEP
  69         int retry = 0;
  70         while (atomic_read(&sdiodev->suspend) && retry++ != 30)
  71                 wait_event_timeout(*wq, false, HZ/100);
  72 #endif
  73 }
  74
  75 static inline int brcmf_sdioh_f0_write_byte(struct brcmf_sdio_dev *sdiodev,
  76                                             uint regaddr, u8 *byte)
  77 {
  78         struct sdio_func *sdfunc = sdiodev->func[0];
  79         int err_ret;
  80
  81         /*
  82          * Can only directly write to some F0 registers.
  83          * Handle F2 enable/disable and Abort command
  84          * as a special case.
  85          */
  86         if (regaddr == SDIO_CCCR_IOEx) {
  87                 sdfunc = sdiodev->func[2];
  88                 if (sdfunc) {
  89                         sdio_claim_host(sdfunc);
  90                         if (*byte & SDIO_FUNC_ENABLE_2) {
  91                                 /* Enable Function 2 */
  92                                 err_ret = sdio_enable_func(sdfunc);
  93                                 if (err_ret)
  94                                         brcmf_dbg(ERROR,
  95                                                   "enable F2 failed:%d\n",
  96                                                   err_ret);
  97                         } else {
  98                                 /* Disable Function 2 */
  99                                 err_ret = sdio_disable_func(sdfunc);
 100                                 if (err_ret)
 101                                         brcmf_dbg(ERROR,
 102                                                   "Disable F2 failed:%d\n",
 103                                                   err_ret);
 104                         }
 105                         sdio_release_host(sdfunc);
 106                 }
 107         } else if (regaddr == SDIO_CCCR_ABORT) {
 108                 sdio_claim_host(sdfunc);
 109                 sdio_writeb(sdfunc, *byte, regaddr, &err_ret);
 110                 sdio_release_host(sdfunc);
 111         } else if (regaddr < 0xF0) {
 112                 brcmf_dbg(ERROR, "F0 Wr:0x%02x: write disallowed\n", regaddr);
 113                 err_ret = -EPERM;
 114         } else {
 115                 sdio_claim_host(sdfunc);
 116                 sdio_f0_writeb(sdfunc, *byte, regaddr, &err_ret);
 117                 sdio_release_host(sdfunc);
 118         }
 119
 120         return err_ret;
 121 }
 122
 123 int brcmf_sdioh_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw, uint func,
 124                              uint regaddr, u8 *byte)
 125 {
 126         int err_ret;
 127
 128         brcmf_dbg(INFO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr);
 129
 130         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait);
 131         if (brcmf_pm_resume_error(sdiodev))
 132                 return -EIO;
 133
 134         if (rw && func == 0) {
 135                 /* handle F0 separately */
 136                 err_ret = brcmf_sdioh_f0_write_byte(sdiodev, regaddr, byte);
 137         } else {
 138                 sdio_claim_host(sdiodev->func[func]);
 139                 if (rw) /* CMD52 Write */
 140                         sdio_writeb(sdiodev->func[func], *byte, regaddr,
 141                                     &err_ret);
 142                 else if (func == 0) {
 143                         *byte = sdio_f0_readb(sdiodev->func[func], regaddr,
 144                                               &err_ret);
 145                 } else {
 146                         *byte = sdio_readb(sdiodev->func[func], regaddr,
 147                                            &err_ret);
 148                 }
 149                 sdio_release_host(sdiodev->func[func]);
 150         }
 151
 152         if (err_ret)
 153                 brcmf_dbg(ERROR, "Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
 154                           rw ? "write" : "read", func, regaddr, *byte, err_ret);
 155
 156         return err_ret;
 157 }
 158
 159 int brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev,
 160                              uint rw, uint func, uint addr, u32 *word,
 161                              uint nbytes)
 162 {
 163         int err_ret = -EIO;
 164
 165         if (func == 0) {
 166                 brcmf_dbg(ERROR, "Only CMD52 allowed to F0\n");
 167                 return -EINVAL;
 168         }
 169
 170         brcmf_dbg(INFO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
 171                   rw, func, addr, nbytes);
 172
 173         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
 174         if (brcmf_pm_resume_error(sdiodev))
 175                 return -EIO;
 176         /* Claim host controller */
 177         sdio_claim_host(sdiodev->func[func]);
 178
 179         if (rw) {               /* CMD52 Write */
 180                 if (nbytes == 4)
 181                         sdio_writel(sdiodev->func[func], *word, addr,
 182                                     &err_ret);
 183                 else if (nbytes == 2)
 184                         sdio_writew(sdiodev->func[func], (*word & 0xFFFF),
 185                                     addr, &err_ret);
 186                 else
 187                         brcmf_dbg(ERROR, "Invalid nbytes: %d\n", nbytes);
 188         } else {                /* CMD52 Read */
 189                 if (nbytes == 4)
 190                         *word = sdio_readl(sdiodev->func[func], addr, &err_ret);
 191                 else if (nbytes == 2)
 192                         *word = sdio_readw(sdiodev->func[func], addr,
 193                                            &err_ret) & 0xFFFF;
 194                 else
 195                         brcmf_dbg(ERROR, "Invalid nbytes: %d\n", nbytes);
 196         }
 197
 198         /* Release host controller */
 199         sdio_release_host(sdiodev->func[func]);
 200
 201         if (err_ret)
 202                 brcmf_dbg(ERROR, "Failed to %s word, Err: 0x%08x\n",
 203                           rw ? "write" : "read", err_ret);
 204
 205         return err_ret;
 206 }
 207
 208 /* precondition: host controller is claimed */
 209 static int
 210 brcmf_sdioh_request_data(struct brcmf_sdio_dev *sdiodev, uint write, bool fifo,
 211                          uint func, uint addr, struct sk_buff *pkt, uint pktlen)
 212 {
 213         int err_ret = 0;
 214
 215         if ((write) && (!fifo)) {
 216                 err_ret = sdio_memcpy_toio(sdiodev->func[func], addr,
 217                                            ((u8 *) (pkt->data)), pktlen);
 218         } else if (write) {
 219                 err_ret = sdio_memcpy_toio(sdiodev->func[func], addr,
 220                                            ((u8 *) (pkt->data)), pktlen);
 221         } else if (fifo) {
 222                 err_ret = sdio_readsb(sdiodev->func[func],
 223                                       ((u8 *) (pkt->data)), addr, pktlen);
 224         } else {
 225                 err_ret = sdio_memcpy_fromio(sdiodev->func[func],
 226                                              ((u8 *) (pkt->data)),
 227                                              addr, pktlen);
 228         }
 229
 230         return err_ret;
 231 }
 232
 233 /*
 234  * This function takes a queue of packets. The packets on the queue
 235  * are assumed to be properly aligned by the caller.
 236  */
 237 int
 238 brcmf_sdioh_request_chain(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
 239                           uint write, uint func, uint addr,
 240                           struct sk_buff_head *pktq)
 241 {
 242         bool fifo = (fix_inc == SDIOH_DATA_FIX);
 243         u32 SGCount = 0;
 244         int err_ret = 0;
 245
 246         struct sk_buff *pkt;
 247
 248         brcmf_dbg(TRACE, "Enter\n");
 249
 250         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_chain_wait);
 251         if (brcmf_pm_resume_error(sdiodev))
 252                 return -EIO;
 253
 254         /* Claim host controller */
 255         sdio_claim_host(sdiodev->func[func]);
 256
 257         skb_queue_walk(pktq, pkt) {
 258                 uint pkt_len = pkt->len;
 259                 pkt_len += 3;
 260                 pkt_len &= 0xFFFFFFFC;
 261
 262                 err_ret = brcmf_sdioh_request_data(sdiodev, write, fifo, func,
 263                                                    addr, pkt, pkt_len);
 264                 if (err_ret) {
 265                         brcmf_dbg(ERROR, "%s FAILED %p[%d], addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
 266                                   write ? "TX" : "RX", pkt, SGCount, addr,
 267                                   pkt_len, err_ret);
 268                 } else {
 269                         brcmf_dbg(TRACE, "%s xfr'd %p[%d], addr=0x%05x, len=%d\n",
 270                                   write ? "TX" : "RX", pkt, SGCount, addr,
 271                                   pkt_len);
 272                 }
 273                 if (!fifo)
 274                         addr += pkt_len;
 275
 276                 SGCount++;
 277         }
 278
 279         /* Release host controller */
 280         sdio_release_host(sdiodev->func[func]);
 281
 282         brcmf_dbg(TRACE, "Exit\n");
 283         return err_ret;
 284 }
 285
 286 /*
 287  * This function takes a single DMA-able packet.
 288  */
 289 int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev,
 290                                uint fix_inc, uint write, uint func, uint addr,
 291                                struct sk_buff *pkt)
 292 {
 293         int status;
 294         uint pkt_len = pkt->len;
 295         bool fifo = (fix_inc == SDIOH_DATA_FIX);
 296
 297         brcmf_dbg(TRACE, "Enter\n");
 298
 299         if (pkt == NULL)
 300                 return -EINVAL;
 301
 302         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
 303         if (brcmf_pm_resume_error(sdiodev))
 304                 return -EIO;
 305
 306         /* Claim host controller */
 307         sdio_claim_host(sdiodev->func[func]);
 308
 309         pkt_len += 3;
 310         pkt_len &= (uint)~3;
 311
 312         status = brcmf_sdioh_request_data(sdiodev, write, fifo, func,
 313                                            addr, pkt, pkt_len);
 314         if (status) {
 315                 brcmf_dbg(ERROR, "%s FAILED %p, addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
 316                           write ? "TX" : "RX", pkt, addr, pkt_len, status);
 317         } else {
 318                 brcmf_dbg(TRACE, "%s xfr'd %p, addr=0x%05x, len=%d\n",
 319                           write ? "TX" : "RX", pkt, addr, pkt_len);
 320         }
 321
 322         /* Release host controller */
 323         sdio_release_host(sdiodev->func[func]);
 324
 325         return status;
 326 }
 327
 328 /* Read client card reg */
 329 static int
 330 brcmf_sdioh_card_regread(struct brcmf_sdio_dev *sdiodev, int func, u32 regaddr,
 331                          int regsize, u32 *data)
 332 {
 333
 334         if ((func == 0) || (regsize == 1)) {
 335                 u8 temp = 0;
 336
 337                 brcmf_sdioh_request_byte(sdiodev, SDIOH_READ, func, regaddr,
 338                                          &temp);
 339                 *data = temp;
 340                 *data &= 0xff;
 341                 brcmf_dbg(DATA, "byte read data=0x%02x\n", *data);
 342         } else {
 343                 brcmf_sdioh_request_word(sdiodev, SDIOH_READ, func, regaddr,
 344                                          data, regsize);
 345                 if (regsize == 2)
 346                         *data &= 0xffff;
 347
 348                 brcmf_dbg(DATA, "word read data=0x%08x\n", *data);
 349         }
 350
 351         return SUCCESS;
 352 }
 353
 354 static int brcmf_sdioh_get_cisaddr(struct brcmf_sdio_dev *sdiodev, u32 regaddr)
 355 {
 356         /* read 24 bits and return valid 17 bit addr */
 357         int i;
 358         u32 scratch, regdata;
 359         __le32 scratch_le;
 360         u8 *ptr = (u8 *)&scratch_le;
 361
 362         for (i = 0; i < 3; i++) {
 363                 if ((brcmf_sdioh_card_regread(sdiodev, 0, regaddr, 1,
 364                                 &regdata)) != SUCCESS)
 365                         brcmf_dbg(ERROR, "Can't read!\n");
 366
 367                 *ptr++ = (u8) regdata;
 368                 regaddr++;
 369         }
 370
 371         /* Only the lower 17-bits are valid */
 372         scratch = le32_to_cpu(scratch_le);
 373         scratch &= 0x0001FFFF;
 374         return scratch;
 375 }
 376
 377 static int brcmf_sdioh_enablefuncs(struct brcmf_sdio_dev *sdiodev)
 378 {
 379         int err_ret;
 380         u32 fbraddr;
 381         u8 func;
 382
 383         brcmf_dbg(TRACE, "\n");
 384
 385         /* Get the Card's common CIS address */
 386         sdiodev->func_cis_ptr[0] = brcmf_sdioh_get_cisaddr(sdiodev,
 387                                                            SDIO_CCCR_CIS);
 388         brcmf_dbg(INFO, "Card's Common CIS Ptr = 0x%x\n",
 389                   sdiodev->func_cis_ptr[0]);
 390
 391         /* Get the Card's function CIS (for each function) */
 392         for (fbraddr = SDIO_FBR_BASE(1), func = 1;
 393              func <= sdiodev->num_funcs; func++, fbraddr += SDIOD_FBR_SIZE) {
 394                 sdiodev->func_cis_ptr[func] =
 395                     brcmf_sdioh_get_cisaddr(sdiodev, SDIO_FBR_CIS + fbraddr);
 396                 brcmf_dbg(INFO, "Function %d CIS Ptr = 0x%x\n",
 397                           func, sdiodev->func_cis_ptr[func]);
 398         }
 399
 400         /* Enable Function 1 */
 401         sdio_claim_host(sdiodev->func[1]);
 402         err_ret = sdio_enable_func(sdiodev->func[1]);
 403         sdio_release_host(sdiodev->func[1]);
 404         if (err_ret)
 405                 brcmf_dbg(ERROR, "Failed to enable F1 Err: 0x%08x\n", err_ret);
 406
 407         return false;
 408 }
 409
 410 /*
 411  *      Public entry points & extern's
 412  */
 413 int brcmf_sdioh_attach(struct brcmf_sdio_dev *sdiodev)
 414 {
 415         int err_ret = 0;
 416
 417         brcmf_dbg(TRACE, "\n");
 418
 419         sdiodev->num_funcs = 2;
 420
 421         sdio_claim_host(sdiodev->func[1]);
 422         err_ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
 423         sdio_release_host(sdiodev->func[1]);
 424         if (err_ret) {
 425                 brcmf_dbg(ERROR, "Failed to set F1 blocksize\n");
 426                 goto out;
 427         }
 428
 429         sdio_claim_host(sdiodev->func[2]);
 430         err_ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
 431         sdio_release_host(sdiodev->func[2]);
 432         if (err_ret) {
 433                 brcmf_dbg(ERROR, "Failed to set F2 blocksize\n");
 434                 goto out;
 435         }
 436
 437         brcmf_sdioh_enablefuncs(sdiodev);
 438
 439 out:
 440         brcmf_dbg(TRACE, "Done\n");
 441         return err_ret;
 442 }
 443
 444 void brcmf_sdioh_detach(struct brcmf_sdio_dev *sdiodev)
 445 {
 446         brcmf_dbg(TRACE, "\n");
 447
 448         /* Disable Function 2 */
 449         sdio_claim_host(sdiodev->func[2]);
 450         sdio_disable_func(sdiodev->func[2]);
 451         sdio_release_host(sdiodev->func[2]);
 452
 453         /* Disable Function 1 */
 454         sdio_claim_host(sdiodev->func[1]);
 455         sdio_disable_func(sdiodev->func[1]);
 456         sdio_release_host(sdiodev->func[1]);
 457
 458 }
 459
 460 static int brcmf_ops_sdio_probe(struct sdio_func *func,
 461                               const struct sdio_device_id *id)
 462 {
 463         int ret = 0;
 464         struct brcmf_sdio_dev *sdiodev;
 465         struct brcmf_bus *bus_if;
 466         brcmf_dbg(TRACE, "Enter\n");
 467         brcmf_dbg(TRACE, "func->class=%x\n", func->class);
 468         brcmf_dbg(TRACE, "sdio_vendor: 0x%04x\n", func->vendor);
 469         brcmf_dbg(TRACE, "sdio_device: 0x%04x\n", func->device);
 470         brcmf_dbg(TRACE, "Function#: 0x%04x\n", func->num);
 471
 472         if (func->num == 1) {
 473                 if (dev_get_drvdata(&func->card->dev)) {
 474                         brcmf_dbg(ERROR, "card private drvdata occupied\n");
 475                         return -ENXIO;
 476                 }
 477                 bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
 478                 if (!bus_if)
 479                         return -ENOMEM;
 480                 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
 481                 if (!sdiodev) {
 482                         kfree(bus_if);
 483                         return -ENOMEM;
 484                 }
 485                 sdiodev->func[0] = func->card->sdio_func[0];
 486                 sdiodev->func[1] = func;
 487                 sdiodev->bus_if = bus_if;
 488                 bus_if->bus_priv = sdiodev;
 489                 bus_if->type = SDIO_BUS;
 490                 bus_if->align = BRCMF_SDALIGN;
 491                 dev_set_drvdata(&func->card->dev, sdiodev);
 492
 493                 atomic_set(&sdiodev->suspend, false);
 494                 init_waitqueue_head(&sdiodev->request_byte_wait);
 495                 init_waitqueue_head(&sdiodev->request_word_wait);
 496                 init_waitqueue_head(&sdiodev->request_chain_wait);
 497                 init_waitqueue_head(&sdiodev->request_buffer_wait);
 498         }
 499
 500         if (func->num == 2) {
 501                 sdiodev = dev_get_drvdata(&func->card->dev);
 502                 if ((!sdiodev) || (sdiodev->func[1]->card != func->card))
 503                         return -ENODEV;
 504                 sdiodev->func[2] = func;
 505
 506                 bus_if = sdiodev->bus_if;
 507                 sdiodev->dev = &func->dev;
 508                 dev_set_drvdata(&func->dev, bus_if);
 509
 510                 brcmf_dbg(TRACE, "F2 found, calling brcmf_sdio_probe...\n");
 511                 ret = brcmf_sdio_probe(sdiodev);
 512         }
 513
 514         return ret;
 515 }
 516
 517 static void brcmf_ops_sdio_remove(struct sdio_func *func)
 518 {
 519         struct brcmf_bus *bus_if;
 520         struct brcmf_sdio_dev *sdiodev;
 521         brcmf_dbg(TRACE, "Enter\n");
 522         brcmf_dbg(INFO, "func->class=%x\n", func->class);
 523         brcmf_dbg(INFO, "sdio_vendor: 0x%04x\n", func->vendor);
 524         brcmf_dbg(INFO, "sdio_device: 0x%04x\n", func->device);
 525         brcmf_dbg(INFO, "Function#: 0x%04x\n", func->num);
 526
 527         if (func->num == 2) {
 528                 bus_if = dev_get_drvdata(&func->dev);
 529                 sdiodev = bus_if->bus_priv;
 530                 brcmf_dbg(TRACE, "F2 found, calling brcmf_sdio_remove...\n");
 531                 brcmf_sdio_remove(sdiodev);
 532                 dev_set_drvdata(&func->card->dev, NULL);
 533                 dev_set_drvdata(&func->dev, NULL);
 534                 kfree(bus_if);
 535                 kfree(sdiodev);
 536         }
 537 }
 538
 539 #ifdef CONFIG_PM_SLEEP
 540 static int brcmf_sdio_suspend(struct device *dev)
 541 {
 542         mmc_pm_flag_t sdio_flags;
 543         struct sdio_func *func = dev_to_sdio_func(dev);
 544         struct brcmf_sdio_dev *sdiodev = dev_get_drvdata(&func->card->dev);
 545         int ret = 0;
 546
 547         brcmf_dbg(TRACE, "\n");
 548
 549         atomic_set(&sdiodev->suspend, true);
 550
 551         sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
 552         if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
 553                 brcmf_dbg(ERROR, "Host can't keep power while suspended\n");
 554                 return -EINVAL;
 555         }
 556
 557         ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
 558         if (ret) {
 559                 brcmf_dbg(ERROR, "Failed to set pm_flags\n");
 560                 return ret;
 561         }
 562
 563         brcmf_sdio_wdtmr_enable(sdiodev, false);
 564
 565         return ret;
 566 }
 567
 568 static int brcmf_sdio_resume(struct device *dev)
 569 {
 570         struct sdio_func *func = dev_to_sdio_func(dev);
 571         struct brcmf_sdio_dev *sdiodev = dev_get_drvdata(&func->card->dev);
 572
 573         brcmf_sdio_wdtmr_enable(sdiodev, true);
 574         atomic_set(&sdiodev->suspend, false);
 575         return 0;
 576 }
 577
 578 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
 579         .suspend        = brcmf_sdio_suspend,
 580         .resume         = brcmf_sdio_resume,
 581 };
 582 #endif  /* CONFIG_PM_SLEEP */
 583
 584 static struct sdio_driver brcmf_sdmmc_driver = {
 585         .probe = brcmf_ops_sdio_probe,
 586         .remove = brcmf_ops_sdio_remove,
 587         .name = "brcmfmac",
 588         .id_table = brcmf_sdmmc_ids,
 589 #ifdef CONFIG_PM_SLEEP
 590         .drv = {
 591                 .pm = &brcmf_sdio_pm_ops,
 592         },
 593 #endif  /* CONFIG_PM_SLEEP */
 594 };
 595
 596 static void __exit brcmf_sdio_exit(void)
 597 {
 598         brcmf_dbg(TRACE, "Enter\n");
 599
 600         sdio_unregister_driver(&brcmf_sdmmc_driver);
 601 }
 602
 603 static int __init brcmf_sdio_init(void)
 604 {
 605         int ret;
 606
 607         brcmf_dbg(TRACE, "Enter\n");
 608
 609         ret = sdio_register_driver(&brcmf_sdmmc_driver);
 610
 611         if (ret)
 612                 brcmf_dbg(ERROR, "sdio_register_driver failed: %d\n", ret);
 613
 614         return ret;
 615 }
 616
 617 module_init(brcmf_sdio_init);
 618 module_exit(brcmf_sdio_exit);