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         sdio_claim_host(sdiodev->func[1]);
  88
  89         /* must configure SDIO_CCCR_IENx to enable irq */
  90         data = brcmf_sdio_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
  91         data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
  92         brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
  93
  94         /* redirect, configure and enable io for interrupt signal */
  95         data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
  96         if (sdiodev->irq_flags & IRQF_TRIGGER_HIGH)
  97                 data |= SDIO_SEPINT_ACT_HI;
  98         brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
  99
 100         sdio_release_host(sdiodev->func[1]);
 101
 102         return 0;
 103 }
 104
 105 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
 106 {
 107         brcmf_dbg(TRACE, "Entering\n");
 108
 109         sdio_claim_host(sdiodev->func[1]);
 110         brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
 111         brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
 112         sdio_release_host(sdiodev->func[1]);
 113
 114         if (sdiodev->irq_wake) {
 115                 disable_irq_wake(sdiodev->irq);
 116                 sdiodev->irq_wake = false;
 117         }
 118         free_irq(sdiodev->irq, &sdiodev->func[1]->card->dev);
 119         sdiodev->irq_en = false;
 120
 121         return 0;
 122 }
 123 #else           /* CONFIG_BRCMFMAC_SDIO_OOB */
 124 static void brcmf_sdio_irqhandler(struct sdio_func *func)
 125 {
 126         struct brcmf_sdio_dev *sdiodev = dev_get_drvdata(&func->card->dev);
 127
 128         brcmf_dbg(INTR, "ib intr triggered\n");
 129
 130         brcmf_sdbrcm_isr(sdiodev->bus);
 131 }
 132
 133 /* dummy handler for SDIO function 2 interrupt */
 134 static void brcmf_sdio_dummy_irqhandler(struct sdio_func *func)
 135 {
 136 }
 137
 138 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
 139 {
 140         brcmf_dbg(TRACE, "Entering\n");
 141
 142         sdio_claim_host(sdiodev->func[1]);
 143         sdio_claim_irq(sdiodev->func[1], brcmf_sdio_irqhandler);
 144         sdio_claim_irq(sdiodev->func[2], brcmf_sdio_dummy_irqhandler);
 145         sdio_release_host(sdiodev->func[1]);
 146
 147         return 0;
 148 }
 149
 150 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
 151 {
 152         brcmf_dbg(TRACE, "Entering\n");
 153
 154         sdio_claim_host(sdiodev->func[1]);
 155         sdio_release_irq(sdiodev->func[2]);
 156         sdio_release_irq(sdiodev->func[1]);
 157         sdio_release_host(sdiodev->func[1]);
 158
 159         return 0;
 160 }
 161 #endif          /* CONFIG_BRCMFMAC_SDIO_OOB */
 162
 163 int
 164 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
 165 {
 166         int err = 0, i;
 167         u8 addr[3];
 168         s32 retry;
 169
 170         addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
 171         addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
 172         addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
 173
 174         for (i = 0; i < 3; i++) {
 175                 retry = 0;
 176                 do {
 177                         if (retry)
 178                                 usleep_range(1000, 2000);
 179                         err = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
 180                                         SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
 181                                         &addr[i]);
 182                 } while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
 183
 184                 if (err) {
 185                         brcmf_dbg(ERROR, "failed at addr:0x%0x\n",
 186                                   SBSDIO_FUNC1_SBADDRLOW + i);
 187                         break;
 188                 }
 189         }
 190
 191         return err;
 192 }
 193
 194 int
 195 brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
 196                         void *data, bool write)
 197 {
 198         u8 func_num, reg_size;
 199         u32 bar;
 200         s32 retry = 0;
 201         int ret;
 202
 203         /*
 204          * figure out how to read the register based on address range
 205          * 0x00 ~ 0x7FF: function 0 CCCR and FBR
 206          * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
 207          * The rest: function 1 silicon backplane core registers
 208          */
 209         if ((addr & ~REG_F0_REG_MASK) == 0) {
 210                 func_num = SDIO_FUNC_0;
 211                 reg_size = 1;
 212         } else if ((addr & ~REG_F1_MISC_MASK) == 0) {
 213                 func_num = SDIO_FUNC_1;
 214                 reg_size = 1;
 215         } else {
 216                 func_num = SDIO_FUNC_1;
 217                 reg_size = 4;
 218
 219                 /* Set the window for SB core register */
 220                 bar = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 221                 if (bar != sdiodev->sbwad) {
 222                         ret = brcmf_sdcard_set_sbaddr_window(sdiodev, bar);
 223                         if (ret != 0) {
 224                                 memset(data, 0xFF, reg_size);
 225                                 return ret;
 226                         }
 227                         sdiodev->sbwad = bar;
 228                 }
 229                 addr &= SBSDIO_SB_OFT_ADDR_MASK;
 230                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 231         }
 232
 233         do {
 234                 if (!write)
 235                         memset(data, 0, reg_size);
 236                 if (retry)      /* wait for 1 ms till bus get settled down */
 237                         usleep_range(1000, 2000);
 238                 if (reg_size == 1)
 239                         ret = brcmf_sdioh_request_byte(sdiodev, write,
 240                                                        func_num, addr, data);
 241                 else
 242                         ret = brcmf_sdioh_request_word(sdiodev, write,
 243                                                        func_num, addr, data, 4);
 244         } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
 245
 246         if (ret != 0)
 247                 brcmf_dbg(ERROR, "failed with %d\n", ret);
 248
 249         return ret;
 250 }
 251
 252 u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
 253 {
 254         u8 data;
 255         int retval;
 256
 257         brcmf_dbg(INFO, "addr:0x%08x\n", addr);
 258         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
 259         brcmf_dbg(INFO, "data:0x%02x\n", data);
 260
 261         if (ret)
 262                 *ret = retval;
 263
 264         return data;
 265 }
 266
 267 u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
 268 {
 269         u32 data;
 270         int retval;
 271
 272         brcmf_dbg(INFO, "addr:0x%08x\n", addr);
 273         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
 274         brcmf_dbg(INFO, "data:0x%08x\n", data);
 275
 276         if (ret)
 277                 *ret = retval;
 278
 279         return data;
 280 }
 281
 282 void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
 283                       u8 data, int *ret)
 284 {
 285         int retval;
 286
 287         brcmf_dbg(INFO, "addr:0x%08x, data:0x%02x\n", addr, data);
 288         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
 289
 290         if (ret)
 291                 *ret = retval;
 292 }
 293
 294 void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
 295                       u32 data, int *ret)
 296 {
 297         int retval;
 298
 299         brcmf_dbg(INFO, "addr:0x%08x, data:0x%08x\n", addr, data);
 300         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
 301
 302         if (ret)
 303                 *ret = retval;
 304 }
 305
 306 static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
 307                                      uint flags, uint width, u32 *addr)
 308 {
 309         uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 310         int err = 0;
 311
 312         /* Async not implemented yet */
 313         if (flags & SDIO_REQ_ASYNC)
 314                 return -ENOTSUPP;
 315
 316         if (bar0 != sdiodev->sbwad) {
 317                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 318                 if (err)
 319                         return err;
 320
 321                 sdiodev->sbwad = bar0;
 322         }
 323
 324         *addr &= SBSDIO_SB_OFT_ADDR_MASK;
 325
 326         if (width == 4)
 327                 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 328
 329         return 0;
 330 }
 331
 332 int
 333 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 334                       uint flags, u8 *buf, uint nbytes)
 335 {
 336         struct sk_buff *mypkt;
 337         int err;
 338
 339         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 340         if (!mypkt) {
 341                 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 342                           nbytes);
 343                 return -EIO;
 344         }
 345
 346         err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
 347         if (!err)
 348                 memcpy(buf, mypkt->data, nbytes);
 349
 350         brcmu_pkt_buf_free_skb(mypkt);
 351         return err;
 352 }
 353
 354 int
 355 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 356                       uint flags, struct sk_buff *pkt)
 357 {
 358         uint incr_fix;
 359         uint width;
 360         int err = 0;
 361
 362         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 363                   fn, addr, pkt->len);
 364
 365         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 366         err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
 367         if (err)
 368                 goto done;
 369
 370         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 371         err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
 372                                          fn, addr, pkt);
 373
 374 done:
 375         return err;
 376 }
 377
 378 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 379                             uint flags, struct sk_buff_head *pktq)
 380 {
 381         uint incr_fix;
 382         uint width;
 383         int err = 0;
 384
 385         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 386                   fn, addr, pktq->qlen);
 387
 388         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 389         err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
 390         if (err)
 391                 goto done;
 392
 393         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 394         err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
 395                                         pktq);
 396
 397 done:
 398         return err;
 399 }
 400
 401 int
 402 brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 403                       uint flags, u8 *buf, uint nbytes)
 404 {
 405         struct sk_buff *mypkt;
 406         int err;
 407
 408         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 409         if (!mypkt) {
 410                 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 411                           nbytes);
 412                 return -EIO;
 413         }
 414
 415         memcpy(mypkt->data, buf, nbytes);
 416         err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);
 417
 418         brcmu_pkt_buf_free_skb(mypkt);
 419         return err;
 420
 421 }
 422
 423 int
 424 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 425                       uint flags, struct sk_buff *pkt)
 426 {
 427         uint incr_fix;
 428         uint width;
 429         uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 430         int err = 0;
 431
 432         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 433                   fn, addr, pkt->len);
 434
 435         /* Async not implemented yet */
 436         if (flags & SDIO_REQ_ASYNC)
 437                 return -ENOTSUPP;
 438
 439         if (bar0 != sdiodev->sbwad) {
 440                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 441                 if (err)
 442                         goto done;
 443
 444                 sdiodev->sbwad = bar0;
 445         }
 446
 447         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 448
 449         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 450         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 451         if (width == 4)
 452                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 453
 454         err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
 455                                          addr, pkt);
 456
 457 done:
 458         return err;
 459 }
 460
 461 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev *sdiodev, uint rw, u32 addr,
 462                         u8 *buf, uint nbytes)
 463 {
 464         struct sk_buff *mypkt;
 465         bool write = rw ? SDIOH_WRITE : SDIOH_READ;
 466         int err;
 467
 468         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 469         addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 470
 471         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 472         if (!mypkt) {
 473                 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 474                           nbytes);
 475                 return -EIO;
 476         }
 477
 478         /* For a write, copy the buffer data into the packet. */
 479         if (write)
 480                 memcpy(mypkt->data, buf, nbytes);
 481
 482         err = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC, write,
 483                                          SDIO_FUNC_1, addr, mypkt);
 484
 485         /* For a read, copy the packet data back to the buffer. */
 486         if (!err && !write)
 487                 memcpy(buf, mypkt->data, nbytes);
 488
 489         brcmu_pkt_buf_free_skb(mypkt);
 490         return err;
 491 }
 492
 493 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
 494 {
 495         char t_func = (char)fn;
 496         brcmf_dbg(TRACE, "Enter\n");
 497
 498         /* issue abort cmd52 command through F0 */
 499         brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
 500                                  SDIO_CCCR_ABORT, &t_func);
 501
 502         brcmf_dbg(TRACE, "Exit\n");
 503         return 0;
 504 }
 505
 506 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
 507 {
 508         u32 regs = 0;
 509         int ret = 0;
 510
 511         ret = brcmf_sdioh_attach(sdiodev);
 512         if (ret)
 513                 goto out;
 514
 515         regs = SI_ENUM_BASE;
 516
 517         /* Report the BAR, to fix if needed */
 518         sdiodev->sbwad = SI_ENUM_BASE;
 519
 520         /* try to attach to the target device */
 521         sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
 522         if (!sdiodev->bus) {
 523                 brcmf_dbg(ERROR, "device attach failed\n");
 524                 ret = -ENODEV;
 525                 goto out;
 526         }
 527
 528 out:
 529         if (ret)
 530                 brcmf_sdio_remove(sdiodev);
 531
 532         return ret;
 533 }
 534 EXPORT_SYMBOL(brcmf_sdio_probe);
 535
 536 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
 537 {
 538         sdiodev->bus_if->state = BRCMF_BUS_DOWN;
 539
 540         if (sdiodev->bus) {
 541                 brcmf_sdbrcm_disconnect(sdiodev->bus);
 542                 sdiodev->bus = NULL;
 543         }
 544
 545         brcmf_sdioh_detach(sdiodev);
 546
 547         sdiodev->sbwad = 0;
 548
 549         return 0;
 550 }
 551 EXPORT_SYMBOL(brcmf_sdio_remove);
 552
 553 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
 554 {
 555         if (enable)
 556                 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
 557         else
 558                 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
 559 }