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
  17 #include <linux/types.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/mmc/sdio.h>
  20 #include <linux/mmc/core.h>
  21 #include <linux/mmc/sdio_func.h>
  22 #include <linux/mmc/sdio_ids.h>
  23 #include <linux/mmc/card.h>
  24 #include <linux/mmc/host.h>
  25 #include <linux/suspend.h>
  26 #include <linux/errno.h>
  27 #include <linux/sched.h>        /* request_irq() */
  28 #include <linux/module.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/platform_data/brcmfmac-sdio.h>
  31 #include <net/cfg80211.h>
  32
  33 #include <defs.h>
  34 #include <brcm_hw_ids.h>
  35 #include <brcmu_utils.h>
  36 #include <brcmu_wifi.h>
  37 #include "sdio_host.h"
  38 #include "sdio_chip.h"
  39 #include "dhd_dbg.h"
  40 #include "dhd_bus.h"
  41
  42 #define SDIO_VENDOR_ID_BROADCOM         0x02d0
  43
  44 #define DMA_ALIGN_MASK  0x03
  45
  46 #define SDIO_FUNC1_BLOCKSIZE            64
  47 #define SDIO_FUNC2_BLOCKSIZE            512
  48
  49 /* devices we support, null terminated */
  50 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
  51         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43143)},
  52         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43241)},
  53         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
  54         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)},
  55         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4334)},
  56         {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM,
  57                      SDIO_DEVICE_ID_BROADCOM_4335_4339)},
  58         { /* end: all zeroes */ },
  59 };
  60 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
  61
  62 static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;
  63
  64
  65 bool
  66 brcmf_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
  67 {
  68         bool is_err = false;
  69 #ifdef CONFIG_PM_SLEEP
  70         is_err = atomic_read(&sdiodev->suspend);
  71 #endif
  72         return is_err;
  73 }
  74
  75 void
  76 brcmf_pm_resume_wait(struct brcmf_sdio_dev *sdiodev, wait_queue_head_t *wq)
  77 {
  78 #ifdef CONFIG_PM_SLEEP
  79         int retry = 0;
  80         while (atomic_read(&sdiodev->suspend) && retry++ != 30)
  81                 wait_event_timeout(*wq, false, HZ/100);
  82 #endif
  83 }
  84
  85 static inline int brcmf_sdioh_f0_write_byte(struct brcmf_sdio_dev *sdiodev,
  86                                             uint regaddr, u8 *byte)
  87 {
  88         struct sdio_func *sdfunc = sdiodev->func[0];
  89         int err_ret;
  90
  91         /*
  92          * Can only directly write to some F0 registers.
  93          * Handle F2 enable/disable and Abort command
  94          * as a special case.
  95          */
  96         if (regaddr == SDIO_CCCR_IOEx) {
  97                 sdfunc = sdiodev->func[2];
  98                 if (sdfunc) {
  99                         if (*byte & SDIO_FUNC_ENABLE_2) {
 100                                 /* Enable Function 2 */
 101                                 err_ret = sdio_enable_func(sdfunc);
 102                                 if (err_ret)
 103                                         brcmf_err("enable F2 failed:%d\n",
 104                                                   err_ret);
 105                         } else {
 106                                 /* Disable Function 2 */
 107                                 err_ret = sdio_disable_func(sdfunc);
 108                                 if (err_ret)
 109                                         brcmf_err("Disable F2 failed:%d\n",
 110                                                   err_ret);
 111                         }
 112                 }
 113         } else if ((regaddr == SDIO_CCCR_ABORT) ||
 114                    (regaddr == SDIO_CCCR_IENx)) {
 115                 sdfunc = kmemdup(sdiodev->func[0], sizeof(struct sdio_func),
 116                                  GFP_KERNEL);
 117                 if (!sdfunc)
 118                         return -ENOMEM;
 119                 sdfunc->num = 0;
 120                 sdio_writeb(sdfunc, *byte, regaddr, &err_ret);
 121                 kfree(sdfunc);
 122         } else if (regaddr < 0xF0) {
 123                 brcmf_err("F0 Wr:0x%02x: write disallowed\n", regaddr);
 124                 err_ret = -EPERM;
 125         } else {
 126                 sdio_f0_writeb(sdfunc, *byte, regaddr, &err_ret);
 127         }
 128
 129         return err_ret;
 130 }
 131
 132 int brcmf_sdioh_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw, uint func,
 133                              uint regaddr, u8 *byte)
 134 {
 135         int err_ret;
 136
 137         brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr);
 138
 139         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait);
 140         if (brcmf_pm_resume_error(sdiodev))
 141                 return -EIO;
 142
 143         if (rw && func == 0) {
 144                 /* handle F0 separately */
 145                 err_ret = brcmf_sdioh_f0_write_byte(sdiodev, regaddr, byte);
 146         } else {
 147                 if (rw) /* CMD52 Write */
 148                         sdio_writeb(sdiodev->func[func], *byte, regaddr,
 149                                     &err_ret);
 150                 else if (func == 0) {
 151                         *byte = sdio_f0_readb(sdiodev->func[func], regaddr,
 152                                               &err_ret);
 153                 } else {
 154                         *byte = sdio_readb(sdiodev->func[func], regaddr,
 155                                            &err_ret);
 156                 }
 157         }
 158
 159         if (err_ret)
 160                 brcmf_err("Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
 161                           rw ? "write" : "read", func, regaddr, *byte, err_ret);
 162
 163         return err_ret;
 164 }
 165
 166 int brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev,
 167                              uint rw, uint func, uint addr, u32 *word,
 168                              uint nbytes)
 169 {
 170         int err_ret = -EIO;
 171
 172         if (func == 0) {
 173                 brcmf_err("Only CMD52 allowed to F0\n");
 174                 return -EINVAL;
 175         }
 176
 177         brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
 178                   rw, func, addr, nbytes);
 179
 180         brcmf_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
 181         if (brcmf_pm_resume_error(sdiodev))
 182                 return -EIO;
 183
 184         if (rw) {               /* CMD52 Write */
 185                 if (nbytes == 4)
 186                         sdio_writel(sdiodev->func[func], *word, addr,
 187                                     &err_ret);
 188                 else if (nbytes == 2)
 189                         sdio_writew(sdiodev->func[func], (*word & 0xFFFF),
 190                                     addr, &err_ret);
 191                 else
 192                         brcmf_err("Invalid nbytes: %d\n", nbytes);
 193         } else {                /* CMD52 Read */
 194                 if (nbytes == 4)
 195                         *word = sdio_readl(sdiodev->func[func], addr, &err_ret);
 196                 else if (nbytes == 2)
 197                         *word = sdio_readw(sdiodev->func[func], addr,
 198                                            &err_ret) & 0xFFFF;
 199                 else
 200                         brcmf_err("Invalid nbytes: %d\n", nbytes);
 201         }
 202
 203         if (err_ret)
 204                 brcmf_err("Failed to %s word, Err: 0x%08x\n",
 205                           rw ? "write" : "read", err_ret);
 206
 207         return err_ret;
 208 }
 209
 210 static int brcmf_sdioh_get_cisaddr(struct brcmf_sdio_dev *sdiodev, u32 regaddr)
 211 {
 212         /* read 24 bits and return valid 17 bit addr */
 213         int i, ret;
 214         u32 scratch, regdata;
 215         __le32 scratch_le;
 216         u8 *ptr = (u8 *)&scratch_le;
 217
 218         for (i = 0; i < 3; i++) {
 219                 regdata = brcmf_sdio_regrl(sdiodev, regaddr, &ret);
 220                 if (ret != 0)
 221                         brcmf_err("Can't read!\n");
 222
 223                 *ptr++ = (u8) regdata;
 224                 regaddr++;
 225         }
 226
 227         /* Only the lower 17-bits are valid */
 228         scratch = le32_to_cpu(scratch_le);
 229         scratch &= 0x0001FFFF;
 230         return scratch;
 231 }
 232
 233 static int brcmf_sdioh_enablefuncs(struct brcmf_sdio_dev *sdiodev)
 234 {
 235         int err_ret;
 236         u32 fbraddr;
 237         u8 func;
 238
 239         brcmf_dbg(SDIO, "\n");
 240
 241         /* Get the Card's common CIS address */
 242         sdiodev->func_cis_ptr[0] = brcmf_sdioh_get_cisaddr(sdiodev,
 243                                                            SDIO_CCCR_CIS);
 244         brcmf_dbg(SDIO, "Card's Common CIS Ptr = 0x%x\n",
 245                   sdiodev->func_cis_ptr[0]);
 246
 247         /* Get the Card's function CIS (for each function) */
 248         for (fbraddr = SDIO_FBR_BASE(1), func = 1;
 249              func <= sdiodev->num_funcs; func++, fbraddr += SDIOD_FBR_SIZE) {
 250                 sdiodev->func_cis_ptr[func] =
 251                     brcmf_sdioh_get_cisaddr(sdiodev, SDIO_FBR_CIS + fbraddr);
 252                 brcmf_dbg(SDIO, "Function %d CIS Ptr = 0x%x\n",
 253                           func, sdiodev->func_cis_ptr[func]);
 254         }
 255
 256         /* Enable Function 1 */
 257         err_ret = sdio_enable_func(sdiodev->func[1]);
 258         if (err_ret)
 259                 brcmf_err("Failed to enable F1 Err: 0x%08x\n", err_ret);
 260
 261         return false;
 262 }
 263
 264 /*
 265  *      Public entry points & extern's
 266  */
 267 int brcmf_sdioh_attach(struct brcmf_sdio_dev *sdiodev)
 268 {
 269         int err_ret = 0;
 270
 271         brcmf_dbg(SDIO, "\n");
 272
 273         sdiodev->num_funcs = 2;
 274
 275         sdio_claim_host(sdiodev->func[1]);
 276
 277         err_ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
 278         if (err_ret) {
 279                 brcmf_err("Failed to set F1 blocksize\n");
 280                 goto out;
 281         }
 282
 283         err_ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
 284         if (err_ret) {
 285                 brcmf_err("Failed to set F2 blocksize\n");
 286                 goto out;
 287         }
 288
 289         brcmf_sdioh_enablefuncs(sdiodev);
 290
 291 out:
 292         sdio_release_host(sdiodev->func[1]);
 293         brcmf_dbg(SDIO, "Done\n");
 294         return err_ret;
 295 }
 296
 297 void brcmf_sdioh_detach(struct brcmf_sdio_dev *sdiodev)
 298 {
 299         brcmf_dbg(SDIO, "\n");
 300
 301         /* Disable Function 2 */
 302         sdio_claim_host(sdiodev->func[2]);
 303         sdio_disable_func(sdiodev->func[2]);
 304         sdio_release_host(sdiodev->func[2]);
 305
 306         /* Disable Function 1 */
 307         sdio_claim_host(sdiodev->func[1]);
 308         sdio_disable_func(sdiodev->func[1]);
 309         sdio_release_host(sdiodev->func[1]);
 310
 311 }
 312
 313 static int brcmf_ops_sdio_probe(struct sdio_func *func,
 314                                 const struct sdio_device_id *id)
 315 {
 316         int err;
 317         struct brcmf_sdio_dev *sdiodev;
 318         struct brcmf_bus *bus_if;
 319         struct mmc_host *host;
 320         uint max_blocks;
 321
 322         brcmf_dbg(SDIO, "Enter\n");
 323         brcmf_dbg(SDIO, "Class=%x\n", func->class);
 324         brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
 325         brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
 326         brcmf_dbg(SDIO, "Function#: %d\n", func->num);
 327
 328         /* Consume func num 1 but dont do anything with it. */
 329         if (func->num == 1)
 330                 return 0;
 331
 332         /* Ignore anything but func 2 */
 333         if (func->num != 2)
 334                 return -ENODEV;
 335
 336         bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
 337         if (!bus_if)
 338                 return -ENOMEM;
 339         sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
 340         if (!sdiodev) {
 341                 kfree(bus_if);
 342                 return -ENOMEM;
 343         }
 344
 345         sdiodev->func[0] = func->card->sdio_func[0];
 346         sdiodev->func[1] = func->card->sdio_func[0];
 347         sdiodev->func[2] = func;
 348
 349         sdiodev->bus_if = bus_if;
 350         bus_if->bus_priv.sdio = sdiodev;
 351         dev_set_drvdata(&func->dev, bus_if);
 352         dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
 353         sdiodev->dev = &sdiodev->func[1]->dev;
 354         sdiodev->pdata = brcmfmac_sdio_pdata;
 355
 356         atomic_set(&sdiodev->suspend, false);
 357         init_waitqueue_head(&sdiodev->request_byte_wait);
 358         init_waitqueue_head(&sdiodev->request_word_wait);
 359         init_waitqueue_head(&sdiodev->request_buffer_wait);
 360
 361         brcmf_dbg(SDIO, "F2 found, calling brcmf_sdio_probe...\n");
 362         err = brcmf_sdio_probe(sdiodev);
 363         if (err) {
 364                 brcmf_err("F2 error, probe failed %d...\n", err);
 365                 goto fail;
 366         }
 367
 368         /*
 369          * determine host related variables after brcmf_sdio_probe()
 370          * as func->cur_blksize is properly set and F2 init has been
 371          * completed successfully.
 372          */
 373         host = func->card->host;
 374         sdiodev->sg_support = host->max_segs > 1;
 375         max_blocks = min_t(uint, host->max_blk_count, 511u);
 376         sdiodev->max_request_size = min_t(uint, host->max_req_size,
 377                                           max_blocks * func->cur_blksize);
 378         sdiodev->max_segment_count = min_t(uint, host->max_segs,
 379                                            SG_MAX_SINGLE_ALLOC);
 380         sdiodev->max_segment_size = host->max_seg_size;
 381         brcmf_dbg(SDIO, "F2 init completed...\n");
 382         return 0;
 383
 384 fail:
 385         dev_set_drvdata(&func->dev, NULL);
 386         dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
 387         kfree(sdiodev);
 388         kfree(bus_if);
 389         return err;
 390 }
 391
 392 static void brcmf_ops_sdio_remove(struct sdio_func *func)
 393 {
 394         struct brcmf_bus *bus_if;
 395         struct brcmf_sdio_dev *sdiodev;
 396
 397         brcmf_dbg(SDIO, "Enter\n");
 398         brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
 399         brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
 400         brcmf_dbg(SDIO, "Function: %d\n", func->num);
 401
 402         if (func->num != 1 && func->num != 2)
 403                 return;
 404
 405         bus_if = dev_get_drvdata(&func->dev);
 406         if (bus_if) {
 407                 sdiodev = bus_if->bus_priv.sdio;
 408                 brcmf_sdio_remove(sdiodev);
 409
 410                 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
 411                 dev_set_drvdata(&sdiodev->func[2]->dev, NULL);
 412
 413                 kfree(bus_if);
 414                 kfree(sdiodev);
 415         }
 416
 417         brcmf_dbg(SDIO, "Exit\n");
 418 }
 419
 420 #ifdef CONFIG_PM_SLEEP
 421 static int brcmf_sdio_suspend(struct device *dev)
 422 {
 423         mmc_pm_flag_t sdio_flags;
 424         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 425         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
 426         int ret = 0;
 427
 428         brcmf_dbg(SDIO, "\n");
 429
 430         atomic_set(&sdiodev->suspend, true);
 431
 432         sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
 433         if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
 434                 brcmf_err("Host can't keep power while suspended\n");
 435                 return -EINVAL;
 436         }
 437
 438         ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
 439         if (ret) {
 440                 brcmf_err("Failed to set pm_flags\n");
 441                 return ret;
 442         }
 443
 444         brcmf_sdio_wdtmr_enable(sdiodev, false);
 445
 446         return ret;
 447 }
 448
 449 static int brcmf_sdio_resume(struct device *dev)
 450 {
 451         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 452         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
 453
 454         brcmf_sdio_wdtmr_enable(sdiodev, true);
 455         atomic_set(&sdiodev->suspend, false);
 456         return 0;
 457 }
 458
 459 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
 460         .suspend        = brcmf_sdio_suspend,
 461         .resume         = brcmf_sdio_resume,
 462 };
 463 #endif  /* CONFIG_PM_SLEEP */
 464
 465 static struct sdio_driver brcmf_sdmmc_driver = {
 466         .probe = brcmf_ops_sdio_probe,
 467         .remove = brcmf_ops_sdio_remove,
 468         .name = BRCMFMAC_SDIO_PDATA_NAME,
 469         .id_table = brcmf_sdmmc_ids,
 470 #ifdef CONFIG_PM_SLEEP
 471         .drv = {
 472                 .pm = &brcmf_sdio_pm_ops,
 473         },
 474 #endif  /* CONFIG_PM_SLEEP */
 475 };
 476
 477 static int brcmf_sdio_pd_probe(struct platform_device *pdev)
 478 {
 479         int ret;
 480
 481         brcmf_dbg(SDIO, "Enter\n");
 482
 483         brcmfmac_sdio_pdata = dev_get_platdata(&pdev->dev);
 484
 485         if (brcmfmac_sdio_pdata->power_on)
 486                 brcmfmac_sdio_pdata->power_on();
 487
 488         ret = sdio_register_driver(&brcmf_sdmmc_driver);
 489         if (ret)
 490                 brcmf_err("sdio_register_driver failed: %d\n", ret);
 491
 492         return ret;
 493 }
 494
 495 static int brcmf_sdio_pd_remove(struct platform_device *pdev)
 496 {
 497         brcmf_dbg(SDIO, "Enter\n");
 498
 499         if (brcmfmac_sdio_pdata->power_off)
 500                 brcmfmac_sdio_pdata->power_off();
 501
 502         sdio_unregister_driver(&brcmf_sdmmc_driver);
 503
 504         return 0;
 505 }
 506
 507 static struct platform_driver brcmf_sdio_pd = {
 508         .remove         = brcmf_sdio_pd_remove,
 509         .driver         = {
 510                 .name   = BRCMFMAC_SDIO_PDATA_NAME,
 511                 .owner  = THIS_MODULE,
 512         }
 513 };
 514
 515 void brcmf_sdio_exit(void)
 516 {
 517         brcmf_dbg(SDIO, "Enter\n");
 518
 519         if (brcmfmac_sdio_pdata)
 520                 platform_driver_unregister(&brcmf_sdio_pd);
 521         else
 522                 sdio_unregister_driver(&brcmf_sdmmc_driver);
 523 }
 524
 525 void brcmf_sdio_init(void)
 526 {
 527         int ret;
 528
 529         brcmf_dbg(SDIO, "Enter\n");
 530
 531         ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe);
 532         if (ret == -ENODEV) {
 533                 brcmf_dbg(SDIO, "No platform data available, registering without.\n");
 534                 ret = sdio_register_driver(&brcmf_sdmmc_driver);
 535         }
 536
 537         if (ret)
 538                 brcmf_err("driver registration failed: %d\n", ret);
 539 }