drivers/net/wireless/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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  19
  20 #include <linux/types.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/export.h>
  23 #include <linux/pci.h>
  24 #include <linux/pci_ids.h>
  25 #include <linux/sched.h>
  26 #include <linux/completion.h>
  27 #include <linux/mmc/sdio.h>
  28 #include <linux/mmc/sdio_func.h>
  29 #include <linux/mmc/card.h>
  30
  31 #include <defs.h>
  32 #include <brcm_hw_ids.h>
  33 #include <brcmu_utils.h>
  34 #include <brcmu_wifi.h>
  35 #include <soc.h>
  36 #include "dhd_bus.h"
  37 #include "dhd_dbg.h"
  38 #include "sdio_host.h"
  39
  40 #define SDIOH_API_ACCESS_RETRY_LIMIT    2
  41
  42 #ifdef CONFIG_BRCMFMAC_SDIO_OOB
  43 static irqreturn_t brcmf_sdio_irqhandler(int irq, void *dev_id)
  44 {
  45         struct brcmf_sdio_dev *sdiodev = dev_get_drvdata(dev_id);
  46
  47         brcmf_dbg(INTR, "oob intr triggered\n");
  48
  49         /*
  50          * out-of-band interrupt is level-triggered which won't
  51          * be cleared until dpc
  52          */
  53         if (sdiodev->irq_en) {
  54                 disable_irq_nosync(irq);
  55                 sdiodev->irq_en = false;
  56         }
  57
  58         brcmf_sdbrcm_isr(sdiodev->bus);
  59
  60         return IRQ_HANDLED;
  61 }
  62
  63 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
  64 {
  65         int ret = 0;
  66         u8 data;
  67         unsigned long flags;
  68
  69         brcmf_dbg(TRACE, "Entering\n");
  70
  71         brcmf_dbg(ERROR, "requesting irq %d\n", sdiodev->irq);
  72         ret = request_irq(sdiodev->irq, brcmf_sdio_irqhandler,
  73                           sdiodev->irq_flags, "brcmf_oob_intr",
  74                           &sdiodev->func[1]->card->dev);
  75         if (ret != 0)
  76                 return ret;
  77         spin_lock_init(&sdiodev->irq_en_lock);
  78         spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
  79         sdiodev->irq_en = true;
  80         spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
  81
  82         ret = enable_irq_wake(sdiodev->irq);
  83         if (ret != 0)
  84                 return ret;
  85         sdiodev->irq_wake = true;
  86
  87         /* must configure SDIO_CCCR_IENx to enable irq */
  88         data = brcmf_sdio_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
  89         data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
  90         brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
  91
  92         /* redirect, configure and enable io for interrupt signal */
  93         data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
  94         if (sdiodev->irq_flags & IRQF_TRIGGER_HIGH)
  95                 data |= SDIO_SEPINT_ACT_HI;
  96         brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
  97
  98         return 0;
  99 }
 100
 101 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
 102 {
 103         brcmf_dbg(TRACE, "Entering\n");
 104
 105         brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
 106         brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
 107
 108         if (sdiodev->irq_wake) {
 109                 disable_irq_wake(sdiodev->irq);
 110                 sdiodev->irq_wake = false;
 111         }
 112         free_irq(sdiodev->irq, &sdiodev->func[1]->card->dev);
 113         sdiodev->irq_en = false;
 114
 115         return 0;
 116 }
 117 #else           /* CONFIG_BRCMFMAC_SDIO_OOB */
 118 static void brcmf_sdio_irqhandler(struct sdio_func *func)
 119 {
 120         struct brcmf_sdio_dev *sdiodev = dev_get_drvdata(&func->card->dev);
 121
 122         brcmf_dbg(INTR, "ib intr triggered\n");
 123
 124         brcmf_sdbrcm_isr(sdiodev->bus);
 125 }
 126
 127 /* dummy handler for SDIO function 2 interrupt */
 128 static void brcmf_sdio_dummy_irqhandler(struct sdio_func *func)
 129 {
 130 }
 131
 132 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
 133 {
 134         brcmf_dbg(TRACE, "Entering\n");
 135
 136         sdio_claim_host(sdiodev->func[1]);
 137         sdio_claim_irq(sdiodev->func[1], brcmf_sdio_irqhandler);
 138         sdio_claim_irq(sdiodev->func[2], brcmf_sdio_dummy_irqhandler);
 139         sdio_release_host(sdiodev->func[1]);
 140
 141         return 0;
 142 }
 143
 144 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
 145 {
 146         brcmf_dbg(TRACE, "Entering\n");
 147
 148         sdio_claim_host(sdiodev->func[1]);
 149         sdio_release_irq(sdiodev->func[2]);
 150         sdio_release_irq(sdiodev->func[1]);
 151         sdio_release_host(sdiodev->func[1]);
 152
 153         return 0;
 154 }
 155 #endif          /* CONFIG_BRCMFMAC_SDIO_OOB */
 156
 157 int
 158 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
 159 {
 160         int err = 0, i;
 161         u8 addr[3];
 162         s32 retry;
 163
 164         addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
 165         addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
 166         addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
 167
 168         for (i = 0; i < 3; i++) {
 169                 retry = 0;
 170                 do {
 171                         if (retry)
 172                                 usleep_range(1000, 2000);
 173                         err = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
 174                                         SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
 175                                         &addr[i]);
 176                 } while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
 177
 178                 if (err) {
 179                         brcmf_dbg(ERROR, "failed at addr:0x%0x\n",
 180                                   SBSDIO_FUNC1_SBADDRLOW + i);
 181                         break;
 182                 }
 183         }
 184
 185         return err;
 186 }
 187
 188 static int
 189 brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
 190                         void *data, bool write)
 191 {
 192         u8 func_num, reg_size;
 193         u32 bar;
 194         s32 retry = 0;
 195         int ret;
 196
 197         /*
 198          * figure out how to read the register based on address range
 199          * 0x00 ~ 0x7FF: function 0 CCCR and FBR
 200          * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
 201          * The rest: function 1 silicon backplane core registers
 202          */
 203         if ((addr & ~REG_F0_REG_MASK) == 0) {
 204                 func_num = SDIO_FUNC_0;
 205                 reg_size = 1;
 206         } else if ((addr & ~REG_F1_MISC_MASK) == 0) {
 207                 func_num = SDIO_FUNC_1;
 208                 reg_size = 1;
 209         } else {
 210                 func_num = SDIO_FUNC_1;
 211                 reg_size = 4;
 212
 213                 /* Set the window for SB core register */
 214                 bar = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 215                 if (bar != sdiodev->sbwad) {
 216                         ret = brcmf_sdcard_set_sbaddr_window(sdiodev, bar);
 217                         if (ret != 0) {
 218                                 memset(data, 0xFF, reg_size);
 219                                 return ret;
 220                         }
 221                         sdiodev->sbwad = bar;
 222                 }
 223                 addr &= SBSDIO_SB_OFT_ADDR_MASK;
 224                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 225         }
 226
 227         do {
 228                 if (!write)
 229                         memset(data, 0, reg_size);
 230                 if (retry)      /* wait for 1 ms till bus get settled down */
 231                         usleep_range(1000, 2000);
 232                 if (reg_size == 1)
 233                         ret = brcmf_sdioh_request_byte(sdiodev, write,
 234                                                        func_num, addr, data);
 235                 else
 236                         ret = brcmf_sdioh_request_word(sdiodev, write,
 237                                                        func_num, addr, data, 4);
 238         } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
 239
 240         if (ret != 0)
 241                 brcmf_dbg(ERROR, "failed with %d\n", ret);
 242
 243         return ret;
 244 }
 245
 246 u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
 247 {
 248         u8 data;
 249         int retval;
 250
 251         brcmf_dbg(INFO, "addr:0x%08x\n", addr);
 252         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
 253         brcmf_dbg(INFO, "data:0x%02x\n", data);
 254
 255         if (ret)
 256                 *ret = retval;
 257
 258         return data;
 259 }
 260
 261 u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
 262 {
 263         u32 data;
 264         int retval;
 265
 266         brcmf_dbg(INFO, "addr:0x%08x\n", addr);
 267         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
 268         brcmf_dbg(INFO, "data:0x%08x\n", data);
 269
 270         if (ret)
 271                 *ret = retval;
 272
 273         return data;
 274 }
 275
 276 void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
 277                       u8 data, int *ret)
 278 {
 279         int retval;
 280
 281         brcmf_dbg(INFO, "addr:0x%08x, data:0x%02x\n", addr, data);
 282         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
 283
 284         if (ret)
 285                 *ret = retval;
 286 }
 287
 288 void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
 289                       u32 data, int *ret)
 290 {
 291         int retval;
 292
 293         brcmf_dbg(INFO, "addr:0x%08x, data:0x%08x\n", addr, data);
 294         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
 295
 296         if (ret)
 297                 *ret = retval;
 298 }
 299
 300 static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
 301                                      uint flags, uint width, u32 *addr)
 302 {
 303         uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 304         int err = 0;
 305
 306         /* Async not implemented yet */
 307         if (flags & SDIO_REQ_ASYNC)
 308                 return -ENOTSUPP;
 309
 310         if (bar0 != sdiodev->sbwad) {
 311                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 312                 if (err)
 313                         return err;
 314
 315                 sdiodev->sbwad = bar0;
 316         }
 317
 318         *addr &= SBSDIO_SB_OFT_ADDR_MASK;
 319
 320         if (width == 4)
 321                 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 322
 323         return 0;
 324 }
 325
 326 int
 327 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 328                       uint flags, u8 *buf, uint nbytes)
 329 {
 330         struct sk_buff *mypkt;
 331         int err;
 332
 333         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 334         if (!mypkt) {
 335                 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 336                           nbytes);
 337                 return -EIO;
 338         }
 339
 340         err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
 341         if (!err)
 342                 memcpy(buf, mypkt->data, nbytes);
 343
 344         brcmu_pkt_buf_free_skb(mypkt);
 345         return err;
 346 }
 347
 348 int
 349 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 350                       uint flags, struct sk_buff *pkt)
 351 {
 352         uint incr_fix;
 353         uint width;
 354         int err = 0;
 355
 356         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 357                   fn, addr, pkt->len);
 358
 359         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 360         err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
 361         if (err)
 362                 return err;
 363
 364         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 365         err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
 366                                          fn, addr, pkt);
 367
 368         return err;
 369 }
 370
 371 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 372                             uint flags, struct sk_buff_head *pktq)
 373 {
 374         uint incr_fix;
 375         uint width;
 376         int err = 0;
 377
 378         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 379                   fn, addr, pktq->qlen);
 380
 381         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 382         err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
 383         if (err)
 384                 return err;
 385
 386         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 387         err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
 388                                         pktq);
 389
 390         return err;
 391 }
 392
 393 int
 394 brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 395                       uint flags, u8 *buf, uint nbytes)
 396 {
 397         struct sk_buff *mypkt;
 398         int err;
 399
 400         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 401         if (!mypkt) {
 402                 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 403                           nbytes);
 404                 return -EIO;
 405         }
 406
 407         memcpy(mypkt->data, buf, nbytes);
 408         err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);
 409
 410         brcmu_pkt_buf_free_skb(mypkt);
 411         return err;
 412
 413 }
 414
 415 int
 416 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 417                       uint flags, struct sk_buff *pkt)
 418 {
 419         uint incr_fix;
 420         uint width;
 421         uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 422         int err = 0;
 423
 424         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 425                   fn, addr, pkt->len);
 426
 427         /* Async not implemented yet */
 428         if (flags & SDIO_REQ_ASYNC)
 429                 return -ENOTSUPP;
 430
 431         if (bar0 != sdiodev->sbwad) {
 432                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 433                 if (err)
 434                         return err;
 435
 436                 sdiodev->sbwad = bar0;
 437         }
 438
 439         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 440
 441         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 442         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 443         if (width == 4)
 444                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 445
 446         return brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
 447                                           addr, pkt);
 448 }
 449
 450 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev *sdiodev, uint rw, u32 addr,
 451                         u8 *buf, uint nbytes)
 452 {
 453         struct sk_buff *mypkt;
 454         bool write = rw ? SDIOH_WRITE : SDIOH_READ;
 455         int err;
 456
 457         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 458         addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 459
 460         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 461         if (!mypkt) {
 462                 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 463                           nbytes);
 464                 return -EIO;
 465         }
 466
 467         /* For a write, copy the buffer data into the packet. */
 468         if (write)
 469                 memcpy(mypkt->data, buf, nbytes);
 470
 471         err = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC, write,
 472                                          SDIO_FUNC_1, addr, mypkt);
 473
 474         /* For a read, copy the packet data back to the buffer. */
 475         if (!err && !write)
 476                 memcpy(buf, mypkt->data, nbytes);
 477
 478         brcmu_pkt_buf_free_skb(mypkt);
 479         return err;
 480 }
 481
 482 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
 483 {
 484         char t_func = (char)fn;
 485         brcmf_dbg(TRACE, "Enter\n");
 486
 487         /* issue abort cmd52 command through F0 */
 488         brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
 489                                  SDIO_CCCR_ABORT, &t_func);
 490
 491         brcmf_dbg(TRACE, "Exit\n");
 492         return 0;
 493 }
 494
 495 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
 496 {
 497         u32 regs = 0;
 498         int ret = 0;
 499
 500         ret = brcmf_sdioh_attach(sdiodev);
 501         if (ret)
 502                 goto out;
 503
 504         regs = SI_ENUM_BASE;
 505
 506         /* Report the BAR, to fix if needed */
 507         sdiodev->sbwad = SI_ENUM_BASE;
 508
 509         /* try to attach to the target device */
 510         sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
 511         if (!sdiodev->bus) {
 512                 brcmf_dbg(ERROR, "device attach failed\n");
 513                 ret = -ENODEV;
 514                 goto out;
 515         }
 516
 517 out:
 518         if (ret)
 519                 brcmf_sdio_remove(sdiodev);
 520
 521         return ret;
 522 }
 523 EXPORT_SYMBOL(brcmf_sdio_probe);
 524
 525 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
 526 {
 527         if (sdiodev->bus) {
 528                 brcmf_sdbrcm_disconnect(sdiodev->bus);
 529                 sdiodev->bus = NULL;
 530         }
 531
 532         brcmf_sdioh_detach(sdiodev);
 533
 534         sdiodev->sbwad = 0;
 535
 536         return 0;
 537 }
 538 EXPORT_SYMBOL(brcmf_sdio_remove);
 539
 540 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
 541 {
 542         if (enable)
 543                 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
 544         else
 545                 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
 546 }