drivers/staging/brcm80211/brcmfmac/bcmsdh.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 /* ****************** SDIO CARD Interface Functions **************************/
  17
  18 #include <linux/types.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/pci.h>
  21 #include <linux/pci_ids.h>
  22 #include <linux/sched.h>
  23 #include <linux/completion.h>
  24 #include <linux/mmc/sdio.h>
  25 #include <linux/mmc/sdio_func.h>
  26 #include <linux/mmc/card.h>
  27
  28 #include <defs.h>
  29 #include <brcm_hw_ids.h>
  30 #include <brcmu_utils.h>
  31 #include <brcmu_wifi.h>
  32 #include <soc.h>
  33 #include "dhd.h"
  34 #include "dhd_bus.h"
  35 #include "dhd_dbg.h"
  36 #include "sdio_host.h"
  37
  38 #define SDIOH_API_ACCESS_RETRY_LIMIT    2
  39
  40 #define SDIOH_CMD_TYPE_NORMAL   0       /* Normal command */
  41 #define SDIOH_CMD_TYPE_APPEND   1       /* Append command */
  42 #define SDIOH_CMD_TYPE_CUTTHRU  2       /* Cut-through command */
  43
  44 #define SDIOH_DATA_PIO          0       /* PIO mode */
  45 #define SDIOH_DATA_DMA          1       /* DMA mode */
  46
  47 /* Module parameters specific to each host-controller driver */
  48
  49 module_param(sd_f2_blocksize, int, 0);
  50
  51 /* IOVar table */
  52 enum {
  53         IOV_MSGLEVEL = 1,
  54         IOV_DEVREG,
  55         IOV_HCIREGS,
  56         IOV_RXCHAIN
  57 };
  58
  59 const struct brcmu_iovar sdioh_iovars[] = {
  60         {"sd_devreg", IOV_DEVREG, 0, IOVT_BUFFER, sizeof(struct brcmf_sdreg)}
  61         ,
  62         {"sd_rxchain", IOV_RXCHAIN, 0, IOVT_BOOL, 0}
  63         ,
  64         {NULL, 0, 0, 0, 0}
  65 };
  66
  67 int
  68 brcmf_sdcard_iovar_op(struct brcmf_sdio_dev *sdiodev, const char *name,
  69                 void *params, int plen, void *arg, int len, bool set)
  70 {
  71         const struct brcmu_iovar *vi = NULL;
  72         int bcmerror = 0;
  73         int val_size;
  74         s32 int_val = 0;
  75         bool bool_val;
  76         u32 actionid;
  77
  78         if (name == NULL || len < 0)
  79                 return -EINVAL;
  80
  81         /* Set does not take qualifiers */
  82         if (set && (params || plen))
  83                 return -EINVAL;
  84
  85         /* Get must have return space;*/
  86         if (!set && !(arg && len))
  87                 return -EINVAL;
  88
  89         brcmf_dbg(TRACE, "Enter (%s %s)\n", set ? "set" : "get", name);
  90
  91         vi = brcmu_iovar_lookup(sdioh_iovars, name);
  92         if (vi == NULL) {
  93                 bcmerror = -ENOTSUPP;
  94                 goto exit;
  95         }
  96
  97         bcmerror = brcmu_iovar_lencheck(vi, arg, len, set);
  98         if (bcmerror != 0)
  99                 goto exit;
 100
 101         /* Set up params so get and set can share the convenience variables */
 102         if (params == NULL) {
 103                 params = arg;
 104                 plen = len;
 105         }
 106
 107         if (vi->type == IOVT_VOID)
 108                 val_size = 0;
 109         else if (vi->type == IOVT_BUFFER)
 110                 val_size = len;
 111         else
 112                 val_size = sizeof(int);
 113
 114         if (plen >= (int)sizeof(int_val))
 115                 memcpy(&int_val, params, sizeof(int_val));
 116
 117         bool_val = (int_val != 0) ? true : false;
 118
 119         actionid = set ? IOV_SVAL(vi->varid) : IOV_GVAL(vi->varid);
 120         switch (actionid) {
 121         case IOV_GVAL(IOV_RXCHAIN):
 122                 int_val = false;
 123                 memcpy(arg, &int_val, val_size);
 124                 break;
 125
 126         case IOV_GVAL(IOV_DEVREG):
 127                 {
 128                         struct brcmf_sdreg *sd_ptr =
 129                                         (struct brcmf_sdreg *) params;
 130                         u8 data = 0;
 131
 132                         if (brcmf_sdioh_request_byte(sdiodev, SDIOH_READ,
 133                                         sd_ptr->func, sd_ptr->offset, &data)) {
 134                                 bcmerror = -EIO;
 135                                 break;
 136                         }
 137
 138                         int_val = (int)data;
 139                         memcpy(arg, &int_val, sizeof(int_val));
 140                         break;
 141                 }
 142
 143         case IOV_SVAL(IOV_DEVREG):
 144                 {
 145                         struct brcmf_sdreg *sd_ptr =
 146                                         (struct brcmf_sdreg *) params;
 147                         u8 data = (u8) sd_ptr->value;
 148
 149                         if (brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
 150                                         sd_ptr->func, sd_ptr->offset, &data)) {
 151                                 bcmerror = -EIO;
 152                                 break;
 153                         }
 154                         break;
 155                 }
 156
 157         default:
 158                 bcmerror = -ENOTSUPP;
 159                 break;
 160         }
 161 exit:
 162
 163         return bcmerror;
 164 }
 165
 166 static void brcmf_sdioh_irqhandler(struct sdio_func *func)
 167 {
 168         struct brcmf_sdio_dev *sdiodev = dev_get_drvdata(&func->card->dev);
 169
 170         brcmf_dbg(TRACE, "***IRQHandler\n");
 171
 172         sdio_release_host(func);
 173
 174         brcmf_sdbrcm_isr(sdiodev->bus);
 175
 176         sdio_claim_host(func);
 177 }
 178
 179 int brcmf_sdcard_intr_reg(struct brcmf_sdio_dev *sdiodev)
 180 {
 181         brcmf_dbg(TRACE, "Entering\n");
 182
 183         sdio_claim_host(sdiodev->func[1]);
 184         sdio_claim_irq(sdiodev->func[1], brcmf_sdioh_irqhandler);
 185         sdio_release_host(sdiodev->func[1]);
 186
 187         return 0;
 188 }
 189
 190 int brcmf_sdcard_intr_dereg(struct brcmf_sdio_dev *sdiodev)
 191 {
 192         brcmf_dbg(TRACE, "Entering\n");
 193
 194         sdio_claim_host(sdiodev->func[1]);
 195         sdio_release_irq(sdiodev->func[1]);
 196         sdio_release_host(sdiodev->func[1]);
 197
 198         return 0;
 199 }
 200
 201 u8 brcmf_sdcard_cfg_read(struct brcmf_sdio_dev *sdiodev, uint fnc_num, u32 addr,
 202                          int *err)
 203 {
 204         int status;
 205         s32 retry = 0;
 206         u8 data = 0;
 207
 208         do {
 209                 if (retry)      /* wait for 1 ms till bus get settled down */
 210                         udelay(1000);
 211                 status = brcmf_sdioh_request_byte(sdiodev, SDIOH_READ, fnc_num,
 212                                                   addr, (u8 *) &data);
 213         } while (status != 0
 214                  && (retry++ < SDIOH_API_ACCESS_RETRY_LIMIT));
 215         if (err)
 216                 *err = status;
 217
 218         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, u8data = 0x%x\n",
 219                   fnc_num, addr, data);
 220
 221         return data;
 222 }
 223
 224 void
 225 brcmf_sdcard_cfg_write(struct brcmf_sdio_dev *sdiodev, uint fnc_num, u32 addr,
 226                        u8 data, int *err)
 227 {
 228         int status;
 229         s32 retry = 0;
 230
 231         do {
 232                 if (retry)      /* wait for 1 ms till bus get settled down */
 233                         udelay(1000);
 234                 status = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, fnc_num,
 235                                                   addr, (u8 *) &data);
 236         } while (status != 0
 237                  && (retry++ < SDIOH_API_ACCESS_RETRY_LIMIT));
 238         if (err)
 239                 *err = status;
 240
 241         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, u8data = 0x%x\n",
 242                   fnc_num, addr, data);
 243 }
 244
 245 int brcmf_sdcard_cis_read(struct brcmf_sdio_dev *sdiodev, uint func, u8 * cis,
 246                           uint length)
 247 {
 248         int status;
 249
 250         u8 *tmp_buf, *tmp_ptr;
 251         u8 *ptr;
 252         bool ascii = func & ~0xf;
 253         func &= 0x7;
 254
 255         status = brcmf_sdioh_cis_read(sdiodev, func, cis, length);
 256
 257         if (ascii) {
 258                 /* Move binary bits to tmp and format them
 259                          into the provided buffer. */
 260                 tmp_buf = kmalloc(length, GFP_ATOMIC);
 261                 if (tmp_buf == NULL) {
 262                         brcmf_dbg(ERROR, "out of memory\n");
 263                         return -ENOMEM;
 264                 }
 265                 memcpy(tmp_buf, cis, length);
 266                 for (tmp_ptr = tmp_buf, ptr = cis; ptr < (cis + length - 4);
 267                      tmp_ptr++) {
 268                         ptr += sprintf((char *)ptr, "%.2x ", *tmp_ptr & 0xff);
 269                         if ((((tmp_ptr - tmp_buf) + 1) & 0xf) == 0)
 270                                 ptr += sprintf((char *)ptr, "\n");
 271                 }
 272                 kfree(tmp_buf);
 273         }
 274
 275         return status;
 276 }
 277
 278 static int
 279 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
 280 {
 281         int err = 0;
 282         brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW,
 283                          (address >> 8) & SBSDIO_SBADDRLOW_MASK, &err);
 284         if (!err)
 285                 brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
 286                                        SBSDIO_FUNC1_SBADDRMID,
 287                                        (address >> 16) & SBSDIO_SBADDRMID_MASK,
 288                                        &err);
 289         if (!err)
 290                 brcmf_sdcard_cfg_write(sdiodev, SDIO_FUNC_1,
 291                                        SBSDIO_FUNC1_SBADDRHIGH,
 292                                        (address >> 24) & SBSDIO_SBADDRHIGH_MASK,
 293                                        &err);
 294
 295         return err;
 296 }
 297
 298 u32 brcmf_sdcard_reg_read(struct brcmf_sdio_dev *sdiodev, u32 addr, uint size)
 299 {
 300         int status;
 301         u32 word = 0;
 302         uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 303
 304         brcmf_dbg(INFO, "fun = 1, addr = 0x%x\n", addr);
 305
 306         if (bar0 != sdiodev->sbwad) {
 307                 if (brcmf_sdcard_set_sbaddr_window(sdiodev, bar0))
 308                         return 0xFFFFFFFF;
 309
 310                 sdiodev->sbwad = bar0;
 311         }
 312
 313         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 314         if (size == 4)
 315                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 316
 317         status = brcmf_sdioh_request_word(sdiodev, SDIOH_CMD_TYPE_NORMAL,
 318                                     SDIOH_READ, SDIO_FUNC_1, addr, &word, size);
 319
 320         sdiodev->regfail = (status != 0);
 321
 322         brcmf_dbg(INFO, "u32data = 0x%x\n", word);
 323
 324         /* if ok, return appropriately masked word */
 325         if (status == 0) {
 326                 switch (size) {
 327                 case sizeof(u8):
 328                         return word & 0xff;
 329                 case sizeof(u16):
 330                         return word & 0xffff;
 331                 case sizeof(u32):
 332                         return word;
 333                 default:
 334                         sdiodev->regfail = true;
 335
 336                 }
 337         }
 338
 339         /* otherwise, bad sdio access or invalid size */
 340         brcmf_dbg(ERROR, "error reading addr 0x%04x size %d\n", addr, size);
 341         return 0xFFFFFFFF;
 342 }
 343
 344 u32 brcmf_sdcard_reg_write(struct brcmf_sdio_dev *sdiodev, u32 addr, uint size,
 345                            u32 data)
 346 {
 347         int status;
 348         uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 349         int err = 0;
 350
 351         brcmf_dbg(INFO, "fun = 1, addr = 0x%x, uint%ddata = 0x%x\n",
 352                   addr, size * 8, data);
 353
 354         if (bar0 != sdiodev->sbwad) {
 355                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 356                 if (err)
 357                         return err;
 358
 359                 sdiodev->sbwad = bar0;
 360         }
 361
 362         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 363         if (size == 4)
 364                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 365         status =
 366             brcmf_sdioh_request_word(sdiodev, SDIOH_CMD_TYPE_NORMAL,
 367                                SDIOH_WRITE, SDIO_FUNC_1, addr, &data, size);
 368         sdiodev->regfail = (status != 0);
 369
 370         if (status == 0)
 371                 return 0;
 372
 373         brcmf_dbg(ERROR, "error writing 0x%08x to addr 0x%04x size %d\n",
 374                   data, addr, size);
 375         return 0xFFFFFFFF;
 376 }
 377
 378 bool brcmf_sdcard_regfail(struct brcmf_sdio_dev *sdiodev)
 379 {
 380         return sdiodev->regfail;
 381 }
 382
 383 int
 384 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 385                       uint flags,
 386                       u8 *buf, uint nbytes, struct sk_buff *pkt)
 387 {
 388         int status;
 389         uint incr_fix;
 390         uint width;
 391         uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 392         int err = 0;
 393
 394         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n", fn, addr, nbytes);
 395
 396         /* Async not implemented yet */
 397         if (flags & SDIO_REQ_ASYNC)
 398                 return -ENOTSUPP;
 399
 400         if (bar0 != sdiodev->sbwad) {
 401                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 402                 if (err)
 403                         return err;
 404
 405                 sdiodev->sbwad = bar0;
 406         }
 407
 408         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 409
 410         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 411         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 412         if (width == 4)
 413                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 414
 415         status = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_PIO,
 416                 incr_fix, SDIOH_READ, fn, addr, width, nbytes, buf, pkt);
 417
 418         return status;
 419 }
 420
 421 int
 422 brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 423                       uint flags, u8 *buf, uint nbytes, struct sk_buff *pkt)
 424 {
 425         uint incr_fix;
 426         uint width;
 427         uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 428         int err = 0;
 429
 430         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n", fn, addr, nbytes);
 431
 432         /* Async not implemented yet */
 433         if (flags & SDIO_REQ_ASYNC)
 434                 return -ENOTSUPP;
 435
 436         if (bar0 != sdiodev->sbwad) {
 437                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 438                 if (err)
 439                         return err;
 440
 441                 sdiodev->sbwad = bar0;
 442         }
 443
 444         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 445
 446         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 447         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 448         if (width == 4)
 449                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 450
 451         return brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_PIO,
 452                 incr_fix, SDIOH_WRITE, fn, addr, width, nbytes, buf, pkt);
 453 }
 454
 455 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev *sdiodev, uint rw, u32 addr,
 456                         u8 *buf, uint nbytes)
 457 {
 458         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 459         addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 460
 461         return brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_PIO,
 462                 SDIOH_DATA_INC, (rw ? SDIOH_WRITE : SDIOH_READ), SDIO_FUNC_1,
 463                 addr, 4, nbytes, buf, NULL);
 464 }
 465
 466 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
 467 {
 468         char t_func = (char)fn;
 469         brcmf_dbg(TRACE, "Enter\n");
 470
 471         /* issue abort cmd52 command through F0 */
 472         brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
 473                                  SDIO_CCCR_ABORT, &t_func);
 474
 475         brcmf_dbg(TRACE, "Exit\n");
 476         return 0;
 477 }
 478
 479 u32 brcmf_sdcard_cur_sbwad(struct brcmf_sdio_dev *sdiodev)
 480 {
 481         return sdiodev->sbwad;
 482 }
 483
 484 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
 485 {
 486         u32 regs = 0;
 487         int ret = 0;
 488
 489         ret = brcmf_sdioh_attach(sdiodev);
 490         if (ret)
 491                 goto out;
 492
 493         regs = SI_ENUM_BASE;
 494
 495         /* Report the BAR, to fix if needed */
 496         sdiodev->sbwad = SI_ENUM_BASE;
 497
 498         /* try to attach to the target device */
 499         sdiodev->bus = brcmf_sdbrcm_probe(0, 0, 0, 0, regs, sdiodev);
 500         if (!sdiodev->bus) {
 501                 brcmf_dbg(ERROR, "device attach failed\n");
 502                 ret = -ENODEV;
 503                 goto out;
 504         }
 505
 506 out:
 507         if (ret)
 508                 brcmf_sdio_remove(sdiodev);
 509
 510         return ret;
 511 }
 512 EXPORT_SYMBOL(brcmf_sdio_probe);
 513
 514 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
 515 {
 516         if (sdiodev->bus) {
 517                 brcmf_sdbrcm_disconnect(sdiodev->bus);
 518                 sdiodev->bus = NULL;
 519         }
 520
 521         brcmf_sdioh_detach(sdiodev);
 522
 523         sdiodev->sbwad = 0;
 524
 525         return 0;
 526 }
 527 EXPORT_SYMBOL(brcmf_sdio_remove);
 528
 529 int brcmf_sdio_register(void)
 530 {
 531         return brcmf_sdio_function_init();
 532 }
 533
 534 void brcmf_sdio_unregister(void)
 535 {
 536         brcmf_sdio_function_cleanup();
 537 }
 538
 539 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
 540 {
 541         if (enable)
 542                 brcmf_sdbrcm_wd_timer(sdiodev->bus, brcmf_watchdog_ms);
 543         else
 544                 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
 545 }