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.h"
  35 #include "dhd_dbg.h"
  36 #include "wl_cfg80211.h"
  37
  38 #define SDIO_VENDOR_ID_BROADCOM         0x02d0
  39
  40 #define DMA_ALIGN_MASK  0x03
  41
  42 #define SDIO_DEVICE_ID_BROADCOM_4329    0x4329
  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         { /* end: all zeroes */ },
  51 };
  52 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
  53
  54 static bool
  55 brcmf_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
  56 {
  57         bool is_err = false;
  58 #ifdef CONFIG_PM_SLEEP
  59         is_err = atomic_read(&sdiodev->suspend);
  60 #endif
  61         return is_err;
  62 }
  63
  64 static void
  65 brcmf_pm_resume_wait(struct brcmf_sdio_dev *sdiodev, wait_queue_head_t *wq)
  66 {
  67 #ifdef CONFIG_PM_SLEEP
  68         int retry = 0;
  69         while (atomic_read(&sdiodev->suspend) && retry++ != 30)
  70                 wait_event_timeout(*wq, false, HZ/100);
  71 #endif
  72 }
  73
  74 static inline int brcmf_sdioh_f0_write_byte(struct brcmf_sdio_dev *sdiodev,
  75                                             uint regaddr, u8 *byte)
  76 {
  77         struct sdio_func *sdfunc = sdiodev->func[0];
  78         int err_ret;
  79
  80         /*
  81          * Can only directly write to some F0 registers.
  82          * Handle F2 enable/disable and Abort command
  83          * as a special case.
  84          */
  85         if (regaddr == SDIO_CCCR_IOEx) {
  86                 sdfunc = sdiodev->func[2];
  87                 if (sdfunc) {
  88                         sdio_claim_host(sdfunc);
  89                         if (*byte & SDIO_FUNC_ENABLE_2) {
  90                                 /* Enable Function 2 */
  91                                 err_ret = sdio_enable_func(sdfunc);
  92                                 if (err_ret)
  93                                         brcmf_dbg(ERROR,
  94                                                   "enable F2 failed:%d\n",
  95                                                   err_ret);
  96                         } else {
  97                                 /* Disable Function 2 */
  98                                 err_ret = sdio_disable_func(sdfunc);
  99                                 if (err_ret)
 100                                         brcmf_dbg(ERROR,
 101                                                   "Disable F2 failed:%d\n",
 102                                                   err_ret);
 103                         }
 104                         sdio_release_host(sdfunc);
 105                 }
 106         } else if (regaddr == SDIO_CCCR_ABORT) {
 107                 sdio_claim_host(sdfunc);
 108                 sdio_writeb(sdfunc, *byte, regaddr, &err_ret);
 109                 sdio_release_host(sdfunc);
 110         } else if (regaddr < 0xF0) {
 111                 brcmf_dbg(ERROR, "F0 Wr:0x%02x: write disallowed\n", regaddr);
 112                 err_ret = -EPERM;
 113         } else {
 114                 sdio_claim_host(sdfunc);
 115                 sdio_f0_writeb(sdfunc, *byte, regaddr, &err_ret);
 116                 sdio_release_host(sdfunc);
 117         }
 118
 119         return err_ret;
 120 }
 121
 122 int brcmf_sdioh_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw, uint func,
 123                              uint regaddr, u8 *byte)
 124 {
 125         int err_ret;
 126
 127         brcmf_dbg(INFO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr);
 128
 129         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait);
 130         if (brcmf_pm_resume_error(sdiodev))
 131                 return -EIO;
 132
 133         if (rw && func == 0) {
 134                 /* handle F0 separately */
 135                 err_ret = brcmf_sdioh_f0_write_byte(sdiodev, regaddr, byte);
 136         } else {
 137                 sdio_claim_host(sdiodev->func[func]);
 138                 if (rw) /* CMD52 Write */
 139                         sdio_writeb(sdiodev->func[func], *byte, regaddr,
 140                                     &err_ret);
 141                 else if (func == 0) {
 142                         *byte = sdio_f0_readb(sdiodev->func[func], regaddr,
 143                                               &err_ret);
 144                 } else {
 145                         *byte = sdio_readb(sdiodev->func[func], regaddr,
 146                                            &err_ret);
 147                 }
 148                 sdio_release_host(sdiodev->func[func]);
 149         }
 150
 151         if (err_ret)
 152                 brcmf_dbg(ERROR, "Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
 153                           rw ? "write" : "read", func, regaddr, *byte, err_ret);
 154
 155         return err_ret;
 156 }
 157
 158 int brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev,
 159                              uint rw, uint func, uint addr, u32 *word,
 160                              uint nbytes)
 161 {
 162         int err_ret = -EIO;
 163
 164         if (func == 0) {
 165                 brcmf_dbg(ERROR, "Only CMD52 allowed to F0\n");
 166                 return -EINVAL;
 167         }
 168
 169         brcmf_dbg(INFO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
 170                   rw, func, addr, nbytes);
 171
 172         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
 173         if (brcmf_pm_resume_error(sdiodev))
 174                 return -EIO;
 175         /* Claim host controller */
 176         sdio_claim_host(sdiodev->func[func]);
 177
 178         if (rw) {               /* CMD52 Write */
 179                 if (nbytes == 4)
 180                         sdio_writel(sdiodev->func[func], *word, addr,
 181                                     &err_ret);
 182                 else if (nbytes == 2)
 183                         sdio_writew(sdiodev->func[func], (*word & 0xFFFF),
 184                                     addr, &err_ret);
 185                 else
 186                         brcmf_dbg(ERROR, "Invalid nbytes: %d\n", nbytes);
 187         } else {                /* CMD52 Read */
 188                 if (nbytes == 4)
 189                         *word = sdio_readl(sdiodev->func[func], addr, &err_ret);
 190                 else if (nbytes == 2)
 191                         *word = sdio_readw(sdiodev->func[func], addr,
 192                                            &err_ret) & 0xFFFF;
 193                 else
 194                         brcmf_dbg(ERROR, "Invalid nbytes: %d\n", nbytes);
 195         }
 196
 197         /* Release host controller */
 198         sdio_release_host(sdiodev->func[func]);
 199
 200         if (err_ret)
 201                 brcmf_dbg(ERROR, "Failed to %s word, Err: 0x%08x\n",
 202                           rw ? "write" : "read", err_ret);
 203
 204         return err_ret;
 205 }
 206
 207 static int
 208 brcmf_sdioh_request_packet(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
 209                            uint write, uint func, uint addr,
 210                            struct sk_buff *pkt)
 211 {
 212         bool fifo = (fix_inc == SDIOH_DATA_FIX);
 213         u32 SGCount = 0;
 214         int err_ret = 0;
 215
 216         struct sk_buff *pnext;
 217
 218         brcmf_dbg(TRACE, "Enter\n");
 219
 220         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_packet_wait);
 221         if (brcmf_pm_resume_error(sdiodev))
 222                 return -EIO;
 223
 224         /* Claim host controller */
 225         sdio_claim_host(sdiodev->func[func]);
 226         for (pnext = pkt; pnext; pnext = pnext->next) {
 227                 uint pkt_len = pnext->len;
 228                 pkt_len += 3;
 229                 pkt_len &= 0xFFFFFFFC;
 230
 231                 if ((write) && (!fifo)) {
 232                         err_ret = sdio_memcpy_toio(sdiodev->func[func], addr,
 233                                                    ((u8 *) (pnext->data)),
 234                                                    pkt_len);
 235                 } else if (write) {
 236                         err_ret = sdio_memcpy_toio(sdiodev->func[func], addr,
 237                                                    ((u8 *) (pnext->data)),
 238                                                    pkt_len);
 239                 } else if (fifo) {
 240                         err_ret = sdio_readsb(sdiodev->func[func],
 241                                               ((u8 *) (pnext->data)),
 242                                               addr, pkt_len);
 243                 } else {
 244                         err_ret = sdio_memcpy_fromio(sdiodev->func[func],
 245                                                      ((u8 *) (pnext->data)),
 246                                                      addr, pkt_len);
 247                 }
 248
 249                 if (err_ret) {
 250                         brcmf_dbg(ERROR, "%s FAILED %p[%d], addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
 251                                   write ? "TX" : "RX", pnext, SGCount, addr,
 252                                   pkt_len, err_ret);
 253                 } else {
 254                         brcmf_dbg(TRACE, "%s xfr'd %p[%d], addr=0x%05x, len=%d\n",
 255                                   write ? "TX" : "RX", pnext, SGCount, addr,
 256                                   pkt_len);
 257                 }
 258
 259                 if (!fifo)
 260                         addr += pkt_len;
 261                 SGCount++;
 262
 263         }
 264
 265         /* Release host controller */
 266         sdio_release_host(sdiodev->func[func]);
 267
 268         brcmf_dbg(TRACE, "Exit\n");
 269         return err_ret;
 270 }
 271
 272 /*
 273  * This function takes a buffer or packet, and fixes everything up
 274  * so that in the end, a DMA-able packet is created.
 275  *
 276  * A buffer does not have an associated packet pointer,
 277  * and may or may not be aligned.
 278  * A packet may consist of a single packet, or a packet chain.
 279  * If it is a packet chain, then all the packets in the chain
 280  * must be properly aligned.
 281  *
 282  * If the packet data is not aligned, then there may only be
 283  * one packet, and in this case,  it is copied to a new
 284  * aligned packet.
 285  *
 286  */
 287 int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev,
 288                                uint fix_inc, uint write, uint func, uint addr,
 289                                uint reg_width, uint buflen_u, u8 *buffer,
 290                                struct sk_buff *pkt)
 291 {
 292         int Status;
 293         struct sk_buff *mypkt = NULL;
 294
 295         brcmf_dbg(TRACE, "Enter\n");
 296
 297         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
 298         if (brcmf_pm_resume_error(sdiodev))
 299                 return -EIO;
 300         /* Case 1: we don't have a packet. */
 301         if (pkt == NULL) {
 302                 brcmf_dbg(DATA, "Creating new %s Packet, len=%d\n",
 303                           write ? "TX" : "RX", buflen_u);
 304                 mypkt = brcmu_pkt_buf_get_skb(buflen_u);
 305                 if (!mypkt) {
 306                         brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 307                                   buflen_u);
 308                         return -EIO;
 309                 }
 310
 311                 /* For a write, copy the buffer data into the packet. */
 312                 if (write)
 313                         memcpy(mypkt->data, buffer, buflen_u);
 314
 315                 Status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
 316                                                     func, addr, mypkt);
 317
 318                 /* For a read, copy the packet data back to the buffer. */
 319                 if (!write)
 320                         memcpy(buffer, mypkt->data, buflen_u);
 321
 322                 brcmu_pkt_buf_free_skb(mypkt);
 323         } else if (((ulong) (pkt->data) & DMA_ALIGN_MASK) != 0) {
 324                 /*
 325                  * Case 2: We have a packet, but it is unaligned.
 326                  * In this case, we cannot have a chain (pkt->next == NULL)
 327                  */
 328                 brcmf_dbg(DATA, "Creating aligned %s Packet, len=%d\n",
 329                           write ? "TX" : "RX", pkt->len);
 330                 mypkt = brcmu_pkt_buf_get_skb(pkt->len);
 331                 if (!mypkt) {
 332                         brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 333                                   pkt->len);
 334                         return -EIO;
 335                 }
 336
 337                 /* For a write, copy the buffer data into the packet. */
 338                 if (write)
 339                         memcpy(mypkt->data, pkt->data, pkt->len);
 340
 341                 Status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
 342                                                     func, addr, mypkt);
 343
 344                 /* For a read, copy the packet data back to the buffer. */
 345                 if (!write)
 346                         memcpy(pkt->data, mypkt->data, mypkt->len);
 347
 348                 brcmu_pkt_buf_free_skb(mypkt);
 349         } else {                /* case 3: We have a packet and
 350                                  it is aligned. */
 351                 brcmf_dbg(DATA, "Aligned %s Packet, direct DMA\n",
 352                           write ? "Tx" : "Rx");
 353                 Status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
 354                                                     func, addr, pkt);
 355         }
 356
 357         return Status;
 358 }
 359
 360 /* Read client card reg */
 361 static int
 362 brcmf_sdioh_card_regread(struct brcmf_sdio_dev *sdiodev, int func, u32 regaddr,
 363                          int regsize, u32 *data)
 364 {
 365
 366         if ((func == 0) || (regsize == 1)) {
 367                 u8 temp = 0;
 368
 369                 brcmf_sdioh_request_byte(sdiodev, SDIOH_READ, func, regaddr,
 370                                          &temp);
 371                 *data = temp;
 372                 *data &= 0xff;
 373                 brcmf_dbg(DATA, "byte read data=0x%02x\n", *data);
 374         } else {
 375                 brcmf_sdioh_request_word(sdiodev, SDIOH_READ, func, regaddr,
 376                                          data, regsize);
 377                 if (regsize == 2)
 378                         *data &= 0xffff;
 379
 380                 brcmf_dbg(DATA, "word read data=0x%08x\n", *data);
 381         }
 382
 383         return SUCCESS;
 384 }
 385
 386 static int brcmf_sdioh_get_cisaddr(struct brcmf_sdio_dev *sdiodev, u32 regaddr)
 387 {
 388         /* read 24 bits and return valid 17 bit addr */
 389         int i;
 390         u32 scratch, regdata;
 391         __le32 scratch_le;
 392         u8 *ptr = (u8 *)&scratch_le;
 393
 394         for (i = 0; i < 3; i++) {
 395                 if ((brcmf_sdioh_card_regread(sdiodev, 0, regaddr, 1,
 396                                 &regdata)) != SUCCESS)
 397                         brcmf_dbg(ERROR, "Can't read!\n");
 398
 399                 *ptr++ = (u8) regdata;
 400                 regaddr++;
 401         }
 402
 403         /* Only the lower 17-bits are valid */
 404         scratch = le32_to_cpu(scratch_le);
 405         scratch &= 0x0001FFFF;
 406         return scratch;
 407 }
 408
 409 static int brcmf_sdioh_enablefuncs(struct brcmf_sdio_dev *sdiodev)
 410 {
 411         int err_ret;
 412         u32 fbraddr;
 413         u8 func;
 414
 415         brcmf_dbg(TRACE, "\n");
 416
 417         /* Get the Card's common CIS address */
 418         sdiodev->func_cis_ptr[0] = brcmf_sdioh_get_cisaddr(sdiodev,
 419                                                            SDIO_CCCR_CIS);
 420         brcmf_dbg(INFO, "Card's Common CIS Ptr = 0x%x\n",
 421                   sdiodev->func_cis_ptr[0]);
 422
 423         /* Get the Card's function CIS (for each function) */
 424         for (fbraddr = SDIO_FBR_BASE(1), func = 1;
 425              func <= sdiodev->num_funcs; func++, fbraddr += SDIOD_FBR_SIZE) {
 426                 sdiodev->func_cis_ptr[func] =
 427                     brcmf_sdioh_get_cisaddr(sdiodev, SDIO_FBR_CIS + fbraddr);
 428                 brcmf_dbg(INFO, "Function %d CIS Ptr = 0x%x\n",
 429                           func, sdiodev->func_cis_ptr[func]);
 430         }
 431
 432         /* Enable Function 1 */
 433         sdio_claim_host(sdiodev->func[1]);
 434         err_ret = sdio_enable_func(sdiodev->func[1]);
 435         sdio_release_host(sdiodev->func[1]);
 436         if (err_ret)
 437                 brcmf_dbg(ERROR, "Failed to enable F1 Err: 0x%08x\n", err_ret);
 438
 439         return false;
 440 }
 441
 442 /*
 443  *      Public entry points & extern's
 444  */
 445 int brcmf_sdioh_attach(struct brcmf_sdio_dev *sdiodev)
 446 {
 447         int err_ret = 0;
 448
 449         brcmf_dbg(TRACE, "\n");
 450
 451         sdiodev->num_funcs = 2;
 452
 453         sdio_claim_host(sdiodev->func[1]);
 454         err_ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
 455         sdio_release_host(sdiodev->func[1]);
 456         if (err_ret) {
 457                 brcmf_dbg(ERROR, "Failed to set F1 blocksize\n");
 458                 goto out;
 459         }
 460
 461         sdio_claim_host(sdiodev->func[2]);
 462         err_ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
 463         sdio_release_host(sdiodev->func[2]);
 464         if (err_ret) {
 465                 brcmf_dbg(ERROR, "Failed to set F2 blocksize\n");
 466                 goto out;
 467         }
 468
 469         brcmf_sdioh_enablefuncs(sdiodev);
 470
 471 out:
 472         brcmf_dbg(TRACE, "Done\n");
 473         return err_ret;
 474 }
 475
 476 void brcmf_sdioh_detach(struct brcmf_sdio_dev *sdiodev)
 477 {
 478         brcmf_dbg(TRACE, "\n");
 479
 480         /* Disable Function 2 */
 481         sdio_claim_host(sdiodev->func[2]);
 482         sdio_disable_func(sdiodev->func[2]);
 483         sdio_release_host(sdiodev->func[2]);
 484
 485         /* Disable Function 1 */
 486         sdio_claim_host(sdiodev->func[1]);
 487         sdio_disable_func(sdiodev->func[1]);
 488         sdio_release_host(sdiodev->func[1]);
 489
 490 }
 491
 492 static int brcmf_ops_sdio_probe(struct sdio_func *func,
 493                               const struct sdio_device_id *id)
 494 {
 495         int ret = 0;
 496         struct brcmf_sdio_dev *sdiodev;
 497         brcmf_dbg(TRACE, "Enter\n");
 498         brcmf_dbg(TRACE, "func->class=%x\n", func->class);
 499         brcmf_dbg(TRACE, "sdio_vendor: 0x%04x\n", func->vendor);
 500         brcmf_dbg(TRACE, "sdio_device: 0x%04x\n", func->device);
 501         brcmf_dbg(TRACE, "Function#: 0x%04x\n", func->num);
 502
 503         if (func->num == 1) {
 504                 if (dev_get_drvdata(&func->card->dev)) {
 505                         brcmf_dbg(ERROR, "card private drvdata occupied\n");
 506                         return -ENXIO;
 507                 }
 508                 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
 509                 if (!sdiodev)
 510                         return -ENOMEM;
 511                 sdiodev->func[0] = func->card->sdio_func[0];
 512                 sdiodev->func[1] = func;
 513                 dev_set_drvdata(&func->card->dev, sdiodev);
 514
 515                 atomic_set(&sdiodev->suspend, false);
 516                 init_waitqueue_head(&sdiodev->request_byte_wait);
 517                 init_waitqueue_head(&sdiodev->request_word_wait);
 518                 init_waitqueue_head(&sdiodev->request_packet_wait);
 519                 init_waitqueue_head(&sdiodev->request_buffer_wait);
 520         }
 521
 522         if (func->num == 2) {
 523                 sdiodev = dev_get_drvdata(&func->card->dev);
 524                 if ((!sdiodev) || (sdiodev->func[1]->card != func->card))
 525                         return -ENODEV;
 526                 sdiodev->func[2] = func;
 527
 528                 brcmf_dbg(TRACE, "F2 found, calling brcmf_sdio_probe...\n");
 529                 ret = brcmf_sdio_probe(sdiodev);
 530         }
 531
 532         return ret;
 533 }
 534
 535 static void brcmf_ops_sdio_remove(struct sdio_func *func)
 536 {
 537         struct brcmf_sdio_dev *sdiodev;
 538         brcmf_dbg(TRACE, "Enter\n");
 539         brcmf_dbg(INFO, "func->class=%x\n", func->class);
 540         brcmf_dbg(INFO, "sdio_vendor: 0x%04x\n", func->vendor);
 541         brcmf_dbg(INFO, "sdio_device: 0x%04x\n", func->device);
 542         brcmf_dbg(INFO, "Function#: 0x%04x\n", func->num);
 543
 544         if (func->num == 2) {
 545                 sdiodev = dev_get_drvdata(&func->card->dev);
 546                 brcmf_dbg(TRACE, "F2 found, calling brcmf_sdio_remove...\n");
 547                 brcmf_sdio_remove(sdiodev);
 548                 dev_set_drvdata(&func->card->dev, NULL);
 549                 kfree(sdiodev);
 550         }
 551 }
 552
 553 #ifdef CONFIG_PM_SLEEP
 554 static int brcmf_sdio_suspend(struct device *dev)
 555 {
 556         mmc_pm_flag_t sdio_flags;
 557         struct brcmf_sdio_dev *sdiodev;
 558         struct sdio_func *func = dev_to_sdio_func(dev);
 559         int ret = 0;
 560
 561         brcmf_dbg(TRACE, "\n");
 562
 563         sdiodev = dev_get_drvdata(&func->card->dev);
 564
 565         atomic_set(&sdiodev->suspend, true);
 566
 567         sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
 568         if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
 569                 brcmf_dbg(ERROR, "Host can't keep power while suspended\n");
 570                 return -EINVAL;
 571         }
 572
 573         ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
 574         if (ret) {
 575                 brcmf_dbg(ERROR, "Failed to set pm_flags\n");
 576                 return ret;
 577         }
 578
 579         brcmf_sdio_wdtmr_enable(sdiodev, false);
 580
 581         return ret;
 582 }
 583
 584 static int brcmf_sdio_resume(struct device *dev)
 585 {
 586         struct brcmf_sdio_dev *sdiodev;
 587         struct sdio_func *func = dev_to_sdio_func(dev);
 588
 589         sdiodev = dev_get_drvdata(&func->card->dev);
 590         brcmf_sdio_wdtmr_enable(sdiodev, true);
 591         atomic_set(&sdiodev->suspend, false);
 592         return 0;
 593 }
 594
 595 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
 596         .suspend        = brcmf_sdio_suspend,
 597         .resume         = brcmf_sdio_resume,
 598 };
 599 #endif  /* CONFIG_PM_SLEEP */
 600
 601 static struct sdio_driver brcmf_sdmmc_driver = {
 602         .probe = brcmf_ops_sdio_probe,
 603         .remove = brcmf_ops_sdio_remove,
 604         .name = "brcmfmac",
 605         .id_table = brcmf_sdmmc_ids,
 606 #ifdef CONFIG_PM_SLEEP
 607         .drv = {
 608                 .pm = &brcmf_sdio_pm_ops,
 609         },
 610 #endif  /* CONFIG_PM_SLEEP */
 611 };
 612
 613 /* bus register interface */
 614 int brcmf_bus_register(void)
 615 {
 616         brcmf_dbg(TRACE, "Enter\n");
 617
 618         return sdio_register_driver(&brcmf_sdmmc_driver);
 619 }
 620
 621 void brcmf_bus_unregister(void)
 622 {
 623         brcmf_dbg(TRACE, "Enter\n");
 624
 625         sdio_unregister_driver(&brcmf_sdmmc_driver);
 626 }