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 <net/cfg80211.h>
  27
  28 #include <defs.h>
  29 #include <brcm_hw_ids.h>
  30 #include <brcmu_utils.h>
  31 #include <brcmu_wifi.h>
  32 #include "sdio_host.h"
  33 #include "dhd.h"
  34 #include "dhd_dbg.h"
  35 #include "wl_cfg80211.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
  43 #define SDIO_FUNC1_BLOCKSIZE            64
  44 #define SDIO_FUNC2_BLOCKSIZE            512
  45
  46 /* devices we support, null terminated */
  47 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
  48         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
  49         { /* end: all zeroes */ },
  50 };
  51 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
  52
  53 static bool
  54 brcmf_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
  55 {
  56         bool is_err = false;
  57 #ifdef CONFIG_PM_SLEEP
  58         is_err = atomic_read(&sdiodev->suspend);
  59 #endif
  60         return is_err;
  61 }
  62
  63 static void
  64 brcmf_pm_resume_wait(struct brcmf_sdio_dev *sdiodev, wait_queue_head_t *wq)
  65 {
  66 #ifdef CONFIG_PM_SLEEP
  67         int retry = 0;
  68         while (atomic_read(&sdiodev->suspend) && retry++ != 30)
  69                 wait_event_timeout(*wq, false, HZ/100);
  70 #endif
  71 }
  72
  73 static inline int brcmf_sdioh_f0_write_byte(struct brcmf_sdio_dev *sdiodev,
  74                                             uint regaddr, u8 *byte)
  75 {
  76         struct sdio_func *sdfunc = sdiodev->func[0];
  77         int err_ret;
  78
  79         /*
  80          * Can only directly write to some F0 registers.
  81          * Handle F2 enable/disable and Abort command
  82          * as a special case.
  83          */
  84         if (regaddr == SDIO_CCCR_IOEx) {
  85                 sdfunc = sdiodev->func[2];
  86                 if (sdfunc) {
  87                         sdio_claim_host(sdfunc);
  88                         if (*byte & SDIO_FUNC_ENABLE_2) {
  89                                 /* Enable Function 2 */
  90                                 err_ret = sdio_enable_func(sdfunc);
  91                                 if (err_ret)
  92                                         brcmf_dbg(ERROR,
  93                                                   "enable F2 failed:%d\n",
  94                                                   err_ret);
  95                         } else {
  96                                 /* Disable Function 2 */
  97                                 err_ret = sdio_disable_func(sdfunc);
  98                                 if (err_ret)
  99                                         brcmf_dbg(ERROR,
 100                                                   "Disable F2 failed:%d\n",
 101                                                   err_ret);
 102                         }
 103                         sdio_release_host(sdfunc);
 104                 }
 105         } else if (regaddr == SDIO_CCCR_ABORT) {
 106                 sdio_claim_host(sdfunc);
 107                 sdio_writeb(sdfunc, *byte, regaddr, &err_ret);
 108                 sdio_release_host(sdfunc);
 109         } else if (regaddr < 0xF0) {
 110                 brcmf_dbg(ERROR, "F0 Wr:0x%02x: write disallowed\n", regaddr);
 111                 err_ret = -EPERM;
 112         } else {
 113                 sdio_claim_host(sdfunc);
 114                 sdio_f0_writeb(sdfunc, *byte, regaddr, &err_ret);
 115                 sdio_release_host(sdfunc);
 116         }
 117
 118         return err_ret;
 119 }
 120
 121 int brcmf_sdioh_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw, uint func,
 122                              uint regaddr, u8 *byte)
 123 {
 124         int err_ret;
 125
 126         brcmf_dbg(INFO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr);
 127
 128         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait);
 129         if (brcmf_pm_resume_error(sdiodev))
 130                 return -EIO;
 131
 132         if (rw && func == 0) {
 133                 /* handle F0 separately */
 134                 err_ret = brcmf_sdioh_f0_write_byte(sdiodev, regaddr, byte);
 135         } else {
 136                 sdio_claim_host(sdiodev->func[func]);
 137                 if (rw) /* CMD52 Write */
 138                         sdio_writeb(sdiodev->func[func], *byte, regaddr,
 139                                     &err_ret);
 140                 else if (func == 0) {
 141                         *byte = sdio_f0_readb(sdiodev->func[func], regaddr,
 142                                               &err_ret);
 143                 } else {
 144                         *byte = sdio_readb(sdiodev->func[func], regaddr,
 145                                            &err_ret);
 146                 }
 147                 sdio_release_host(sdiodev->func[func]);
 148         }
 149
 150         if (err_ret)
 151                 brcmf_dbg(ERROR, "Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
 152                           rw ? "write" : "read", func, regaddr, *byte, err_ret);
 153
 154         return err_ret;
 155 }
 156
 157 int brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev,
 158                              uint rw, uint func, uint addr, u32 *word,
 159                              uint nbytes)
 160 {
 161         int err_ret = -EIO;
 162
 163         if (func == 0) {
 164                 brcmf_dbg(ERROR, "Only CMD52 allowed to F0\n");
 165                 return -EINVAL;
 166         }
 167
 168         brcmf_dbg(INFO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
 169                   rw, func, addr, nbytes);
 170
 171         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
 172         if (brcmf_pm_resume_error(sdiodev))
 173                 return -EIO;
 174         /* Claim host controller */
 175         sdio_claim_host(sdiodev->func[func]);
 176
 177         if (rw) {               /* CMD52 Write */
 178                 if (nbytes == 4)
 179                         sdio_writel(sdiodev->func[func], *word, addr,
 180                                     &err_ret);
 181                 else if (nbytes == 2)
 182                         sdio_writew(sdiodev->func[func], (*word & 0xFFFF),
 183                                     addr, &err_ret);
 184                 else
 185                         brcmf_dbg(ERROR, "Invalid nbytes: %d\n", nbytes);
 186         } else {                /* CMD52 Read */
 187                 if (nbytes == 4)
 188                         *word = sdio_readl(sdiodev->func[func], addr, &err_ret);
 189                 else if (nbytes == 2)
 190                         *word = sdio_readw(sdiodev->func[func], addr,
 191                                            &err_ret) & 0xFFFF;
 192                 else
 193                         brcmf_dbg(ERROR, "Invalid nbytes: %d\n", nbytes);
 194         }
 195
 196         /* Release host controller */
 197         sdio_release_host(sdiodev->func[func]);
 198
 199         if (err_ret)
 200                 brcmf_dbg(ERROR, "Failed to %s word, Err: 0x%08x\n",
 201                           rw ? "write" : "read", err_ret);
 202
 203         return err_ret;
 204 }
 205
 206 static int
 207 brcmf_sdioh_request_packet(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
 208                            uint write, uint func, uint addr,
 209                            struct sk_buff *pkt)
 210 {
 211         bool fifo = (fix_inc == SDIOH_DATA_FIX);
 212         u32 SGCount = 0;
 213         int err_ret = 0;
 214
 215         struct sk_buff *pnext;
 216
 217         brcmf_dbg(TRACE, "Enter\n");
 218
 219         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_packet_wait);
 220         if (brcmf_pm_resume_error(sdiodev))
 221                 return -EIO;
 222
 223         /* Claim host controller */
 224         sdio_claim_host(sdiodev->func[func]);
 225         for (pnext = pkt; pnext; pnext = pnext->next) {
 226                 uint pkt_len = pnext->len;
 227                 pkt_len += 3;
 228                 pkt_len &= 0xFFFFFFFC;
 229
 230                 if ((write) && (!fifo)) {
 231                         err_ret = sdio_memcpy_toio(sdiodev->func[func], addr,
 232                                                    ((u8 *) (pnext->data)),
 233                                                    pkt_len);
 234                 } else if (write) {
 235                         err_ret = sdio_memcpy_toio(sdiodev->func[func], addr,
 236                                                    ((u8 *) (pnext->data)),
 237                                                    pkt_len);
 238                 } else if (fifo) {
 239                         err_ret = sdio_readsb(sdiodev->func[func],
 240                                               ((u8 *) (pnext->data)),
 241                                               addr, pkt_len);
 242                 } else {
 243                         err_ret = sdio_memcpy_fromio(sdiodev->func[func],
 244                                                      ((u8 *) (pnext->data)),
 245                                                      addr, pkt_len);
 246                 }
 247
 248                 if (err_ret) {
 249                         brcmf_dbg(ERROR, "%s FAILED %p[%d], addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
 250                                   write ? "TX" : "RX", pnext, SGCount, addr,
 251                                   pkt_len, err_ret);
 252                 } else {
 253                         brcmf_dbg(TRACE, "%s xfr'd %p[%d], addr=0x%05x, len=%d\n",
 254                                   write ? "TX" : "RX", pnext, SGCount, addr,
 255                                   pkt_len);
 256                 }
 257
 258                 if (!fifo)
 259                         addr += pkt_len;
 260                 SGCount++;
 261
 262         }
 263
 264         /* Release host controller */
 265         sdio_release_host(sdiodev->func[func]);
 266
 267         brcmf_dbg(TRACE, "Exit\n");
 268         return err_ret;
 269 }
 270
 271 /*
 272  * This function takes a buffer or packet, and fixes everything up
 273  * so that in the end, a DMA-able packet is created.
 274  *
 275  * A buffer does not have an associated packet pointer,
 276  * and may or may not be aligned.
 277  * A packet may consist of a single packet, or a packet chain.
 278  * If it is a packet chain, then all the packets in the chain
 279  * must be properly aligned.
 280  *
 281  * If the packet data is not aligned, then there may only be
 282  * one packet, and in this case,  it is copied to a new
 283  * aligned packet.
 284  *
 285  */
 286 int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev,
 287                                uint fix_inc, uint write, uint func, uint addr,
 288                                uint reg_width, uint buflen_u, u8 *buffer,
 289                                struct sk_buff *pkt)
 290 {
 291         int Status;
 292         struct sk_buff *mypkt = NULL;
 293
 294         brcmf_dbg(TRACE, "Enter\n");
 295
 296         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
 297         if (brcmf_pm_resume_error(sdiodev))
 298                 return -EIO;
 299         /* Case 1: we don't have a packet. */
 300         if (pkt == NULL) {
 301                 brcmf_dbg(DATA, "Creating new %s Packet, len=%d\n",
 302                           write ? "TX" : "RX", buflen_u);
 303                 mypkt = brcmu_pkt_buf_get_skb(buflen_u);
 304                 if (!mypkt) {
 305                         brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 306                                   buflen_u);
 307                         return -EIO;
 308                 }
 309
 310                 /* For a write, copy the buffer data into the packet. */
 311                 if (write)
 312                         memcpy(mypkt->data, buffer, buflen_u);
 313
 314                 Status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
 315                                                     func, addr, mypkt);
 316
 317                 /* For a read, copy the packet data back to the buffer. */
 318                 if (!write)
 319                         memcpy(buffer, mypkt->data, buflen_u);
 320
 321                 brcmu_pkt_buf_free_skb(mypkt);
 322         } else if (((ulong) (pkt->data) & DMA_ALIGN_MASK) != 0) {
 323                 /*
 324                  * Case 2: We have a packet, but it is unaligned.
 325                  * In this case, we cannot have a chain (pkt->next == NULL)
 326                  */
 327                 brcmf_dbg(DATA, "Creating aligned %s Packet, len=%d\n",
 328                           write ? "TX" : "RX", pkt->len);
 329                 mypkt = brcmu_pkt_buf_get_skb(pkt->len);
 330                 if (!mypkt) {
 331                         brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 332                                   pkt->len);
 333                         return -EIO;
 334                 }
 335
 336                 /* For a write, copy the buffer data into the packet. */
 337                 if (write)
 338                         memcpy(mypkt->data, pkt->data, pkt->len);
 339
 340                 Status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
 341                                                     func, addr, mypkt);
 342
 343                 /* For a read, copy the packet data back to the buffer. */
 344                 if (!write)
 345                         memcpy(pkt->data, mypkt->data, mypkt->len);
 346
 347                 brcmu_pkt_buf_free_skb(mypkt);
 348         } else {                /* case 3: We have a packet and
 349                                  it is aligned. */
 350                 brcmf_dbg(DATA, "Aligned %s Packet, direct DMA\n",
 351                           write ? "Tx" : "Rx");
 352                 Status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
 353                                                     func, addr, pkt);
 354         }
 355
 356         return Status;
 357 }
 358
 359 /* Read client card reg */
 360 static int
 361 brcmf_sdioh_card_regread(struct brcmf_sdio_dev *sdiodev, int func, u32 regaddr,
 362                          int regsize, u32 *data)
 363 {
 364
 365         if ((func == 0) || (regsize == 1)) {
 366                 u8 temp = 0;
 367
 368                 brcmf_sdioh_request_byte(sdiodev, SDIOH_READ, func, regaddr,
 369                                          &temp);
 370                 *data = temp;
 371                 *data &= 0xff;
 372                 brcmf_dbg(DATA, "byte read data=0x%02x\n", *data);
 373         } else {
 374                 brcmf_sdioh_request_word(sdiodev, SDIOH_READ, func, regaddr,
 375                                          data, regsize);
 376                 if (regsize == 2)
 377                         *data &= 0xffff;
 378
 379                 brcmf_dbg(DATA, "word read data=0x%08x\n", *data);
 380         }
 381
 382         return SUCCESS;
 383 }
 384
 385 static int brcmf_sdioh_get_cisaddr(struct brcmf_sdio_dev *sdiodev, u32 regaddr)
 386 {
 387         /* read 24 bits and return valid 17 bit addr */
 388         int i;
 389         u32 scratch, regdata;
 390         __le32 scratch_le;
 391         u8 *ptr = (u8 *)&scratch_le;
 392
 393         for (i = 0; i < 3; i++) {
 394                 if ((brcmf_sdioh_card_regread(sdiodev, 0, regaddr, 1,
 395                                 &regdata)) != SUCCESS)
 396                         brcmf_dbg(ERROR, "Can't read!\n");
 397
 398                 *ptr++ = (u8) regdata;
 399                 regaddr++;
 400         }
 401
 402         /* Only the lower 17-bits are valid */
 403         scratch = le32_to_cpu(scratch_le);
 404         scratch &= 0x0001FFFF;
 405         return scratch;
 406 }
 407
 408 static int brcmf_sdioh_enablefuncs(struct brcmf_sdio_dev *sdiodev)
 409 {
 410         int err_ret;
 411         u32 fbraddr;
 412         u8 func;
 413
 414         brcmf_dbg(TRACE, "\n");
 415
 416         /* Get the Card's common CIS address */
 417         sdiodev->func_cis_ptr[0] = brcmf_sdioh_get_cisaddr(sdiodev,
 418                                                            SDIO_CCCR_CIS);
 419         brcmf_dbg(INFO, "Card's Common CIS Ptr = 0x%x\n",
 420                   sdiodev->func_cis_ptr[0]);
 421
 422         /* Get the Card's function CIS (for each function) */
 423         for (fbraddr = SDIO_FBR_BASE(1), func = 1;
 424              func <= sdiodev->num_funcs; func++, fbraddr += SDIOD_FBR_SIZE) {
 425                 sdiodev->func_cis_ptr[func] =
 426                     brcmf_sdioh_get_cisaddr(sdiodev, SDIO_FBR_CIS + fbraddr);
 427                 brcmf_dbg(INFO, "Function %d CIS Ptr = 0x%x\n",
 428                           func, sdiodev->func_cis_ptr[func]);
 429         }
 430
 431         /* Enable Function 1 */
 432         sdio_claim_host(sdiodev->func[1]);
 433         err_ret = sdio_enable_func(sdiodev->func[1]);
 434         sdio_release_host(sdiodev->func[1]);
 435         if (err_ret)
 436                 brcmf_dbg(ERROR, "Failed to enable F1 Err: 0x%08x\n", err_ret);
 437
 438         return false;
 439 }
 440
 441 /*
 442  *      Public entry points & extern's
 443  */
 444 int brcmf_sdioh_attach(struct brcmf_sdio_dev *sdiodev)
 445 {
 446         int err_ret = 0;
 447
 448         brcmf_dbg(TRACE, "\n");
 449
 450         sdiodev->num_funcs = 2;
 451
 452         sdio_claim_host(sdiodev->func[1]);
 453         err_ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
 454         sdio_release_host(sdiodev->func[1]);
 455         if (err_ret) {
 456                 brcmf_dbg(ERROR, "Failed to set F1 blocksize\n");
 457                 goto out;
 458         }
 459
 460         sdio_claim_host(sdiodev->func[2]);
 461         err_ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
 462         sdio_release_host(sdiodev->func[2]);
 463         if (err_ret) {
 464                 brcmf_dbg(ERROR, "Failed to set F2 blocksize\n");
 465                 goto out;
 466         }
 467
 468         brcmf_sdioh_enablefuncs(sdiodev);
 469
 470 out:
 471         brcmf_dbg(TRACE, "Done\n");
 472         return err_ret;
 473 }
 474
 475 void brcmf_sdioh_detach(struct brcmf_sdio_dev *sdiodev)
 476 {
 477         brcmf_dbg(TRACE, "\n");
 478
 479         /* Disable Function 2 */
 480         sdio_claim_host(sdiodev->func[2]);
 481         sdio_disable_func(sdiodev->func[2]);
 482         sdio_release_host(sdiodev->func[2]);
 483
 484         /* Disable Function 1 */
 485         sdio_claim_host(sdiodev->func[1]);
 486         sdio_disable_func(sdiodev->func[1]);
 487         sdio_release_host(sdiodev->func[1]);
 488
 489 }
 490
 491 static int brcmf_ops_sdio_probe(struct sdio_func *func,
 492                               const struct sdio_device_id *id)
 493 {
 494         int ret = 0;
 495         struct brcmf_sdio_dev *sdiodev;
 496         brcmf_dbg(TRACE, "Enter\n");
 497         brcmf_dbg(TRACE, "func->class=%x\n", func->class);
 498         brcmf_dbg(TRACE, "sdio_vendor: 0x%04x\n", func->vendor);
 499         brcmf_dbg(TRACE, "sdio_device: 0x%04x\n", func->device);
 500         brcmf_dbg(TRACE, "Function#: 0x%04x\n", func->num);
 501
 502         if (func->num == 1) {
 503                 if (dev_get_drvdata(&func->card->dev)) {
 504                         brcmf_dbg(ERROR, "card private drvdata occupied\n");
 505                         return -ENXIO;
 506                 }
 507                 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
 508                 if (!sdiodev)
 509                         return -ENOMEM;
 510                 sdiodev->func[0] = func->card->sdio_func[0];
 511                 sdiodev->func[1] = func;
 512                 dev_set_drvdata(&func->card->dev, sdiodev);
 513
 514                 atomic_set(&sdiodev->suspend, false);
 515                 init_waitqueue_head(&sdiodev->request_byte_wait);
 516                 init_waitqueue_head(&sdiodev->request_word_wait);
 517                 init_waitqueue_head(&sdiodev->request_packet_wait);
 518                 init_waitqueue_head(&sdiodev->request_buffer_wait);
 519         }
 520
 521         if (func->num == 2) {
 522                 sdiodev = dev_get_drvdata(&func->card->dev);
 523                 if ((!sdiodev) || (sdiodev->func[1]->card != func->card))
 524                         return -ENODEV;
 525                 sdiodev->func[2] = func;
 526
 527                 brcmf_dbg(TRACE, "F2 found, calling brcmf_sdio_probe...\n");
 528                 ret = brcmf_sdio_probe(sdiodev);
 529         }
 530
 531         return ret;
 532 }
 533
 534 static void brcmf_ops_sdio_remove(struct sdio_func *func)
 535 {
 536         struct brcmf_sdio_dev *sdiodev;
 537         brcmf_dbg(TRACE, "Enter\n");
 538         brcmf_dbg(INFO, "func->class=%x\n", func->class);
 539         brcmf_dbg(INFO, "sdio_vendor: 0x%04x\n", func->vendor);
 540         brcmf_dbg(INFO, "sdio_device: 0x%04x\n", func->device);
 541         brcmf_dbg(INFO, "Function#: 0x%04x\n", func->num);
 542
 543         if (func->num == 2) {
 544                 sdiodev = dev_get_drvdata(&func->card->dev);
 545                 brcmf_dbg(TRACE, "F2 found, calling brcmf_sdio_remove...\n");
 546                 brcmf_sdio_remove(sdiodev);
 547                 dev_set_drvdata(&func->card->dev, NULL);
 548                 kfree(sdiodev);
 549         }
 550 }
 551
 552 #ifdef CONFIG_PM_SLEEP
 553 static int brcmf_sdio_suspend(struct device *dev)
 554 {
 555         mmc_pm_flag_t sdio_flags;
 556         struct brcmf_sdio_dev *sdiodev;
 557         struct sdio_func *func = dev_to_sdio_func(dev);
 558         int ret = 0;
 559
 560         brcmf_dbg(TRACE, "\n");
 561
 562         sdiodev = dev_get_drvdata(&func->card->dev);
 563
 564         atomic_set(&sdiodev->suspend, true);
 565
 566         sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
 567         if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
 568                 brcmf_dbg(ERROR, "Host can't keep power while suspended\n");
 569                 return -EINVAL;
 570         }
 571
 572         ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
 573         if (ret) {
 574                 brcmf_dbg(ERROR, "Failed to set pm_flags\n");
 575                 return ret;
 576         }
 577
 578         brcmf_sdio_wdtmr_enable(sdiodev, false);
 579
 580         return ret;
 581 }
 582
 583 static int brcmf_sdio_resume(struct device *dev)
 584 {
 585         struct brcmf_sdio_dev *sdiodev;
 586         struct sdio_func *func = dev_to_sdio_func(dev);
 587
 588         sdiodev = dev_get_drvdata(&func->card->dev);
 589         brcmf_sdio_wdtmr_enable(sdiodev, true);
 590         atomic_set(&sdiodev->suspend, false);
 591         return 0;
 592 }
 593
 594 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
 595         .suspend        = brcmf_sdio_suspend,
 596         .resume         = brcmf_sdio_resume,
 597 };
 598 #endif  /* CONFIG_PM_SLEEP */
 599
 600 static struct sdio_driver brcmf_sdmmc_driver = {
 601         .probe = brcmf_ops_sdio_probe,
 602         .remove = brcmf_ops_sdio_remove,
 603         .name = "brcmfmac",
 604         .id_table = brcmf_sdmmc_ids,
 605 #ifdef CONFIG_PM_SLEEP
 606         .drv = {
 607                 .pm = &brcmf_sdio_pm_ops,
 608         },
 609 #endif  /* CONFIG_PM_SLEEP */
 610 };
 611
 612 /* bus register interface */
 613 int brcmf_bus_register(void)
 614 {
 615         brcmf_dbg(TRACE, "Enter\n");
 616
 617         return sdio_register_driver(&brcmf_sdmmc_driver);
 618 }
 619
 620 void brcmf_bus_unregister(void)
 621 {
 622         brcmf_dbg(TRACE, "Enter\n");
 623
 624         sdio_unregister_driver(&brcmf_sdmmc_driver);
 625 }