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 ane 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 ~ 0xFF: function 0 CCCR
 200          * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
 201          * The rest: function 1 silicon backplane core registers
 202          */
 203         if ((addr & ~REG_F0_CCCR_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         sdiodev->regfail = (ret != 0);
 241         if (sdiodev->regfail)
 242                 brcmf_dbg(ERROR, "failed with %d\n", ret);
 243
 244         return ret;
 245 }
 246
 247 u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
 248 {
 249         u8 data;
 250         int retval;
 251
 252         brcmf_dbg(INFO, "addr:0x%08x\n", addr);
 253         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
 254         brcmf_dbg(INFO, "data:0x%02x\n", data);
 255
 256         if (ret)
 257                 *ret = retval;
 258
 259         return data;
 260 }
 261
 262 u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
 263 {
 264         u32 data;
 265         int retval;
 266
 267         brcmf_dbg(INFO, "addr:0x%08x\n", addr);
 268         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
 269         brcmf_dbg(INFO, "data:0x%08x\n", data);
 270
 271         if (ret)
 272                 *ret = retval;
 273
 274         return data;
 275 }
 276
 277 void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
 278                       u8 data, int *ret)
 279 {
 280         int retval;
 281
 282         brcmf_dbg(INFO, "addr:0x%08x, data:0x%02x\n", addr, data);
 283         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
 284
 285         if (ret)
 286                 *ret = retval;
 287 }
 288
 289 void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
 290                       u32 data, int *ret)
 291 {
 292         int retval;
 293
 294         brcmf_dbg(INFO, "addr:0x%08x, data:0x%08x\n", addr, data);
 295         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
 296
 297         if (ret)
 298                 *ret = retval;
 299 }
 300
 301 bool brcmf_sdcard_regfail(struct brcmf_sdio_dev *sdiodev)
 302 {
 303         return sdiodev->regfail;
 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                 return err;
 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         return err;
 375 }
 376
 377 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 378                             uint flags, struct sk_buff_head *pktq)
 379 {
 380         uint incr_fix;
 381         uint width;
 382         int err = 0;
 383
 384         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 385                   fn, addr, pktq->qlen);
 386
 387         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 388         err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
 389         if (err)
 390                 return err;
 391
 392         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 393         err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
 394                                         pktq);
 395
 396         return err;
 397 }
 398
 399 int
 400 brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 401                       uint flags, u8 *buf, uint nbytes)
 402 {
 403         struct sk_buff *mypkt;
 404         int err;
 405
 406         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 407         if (!mypkt) {
 408                 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 409                           nbytes);
 410                 return -EIO;
 411         }
 412
 413         memcpy(mypkt->data, buf, nbytes);
 414         err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);
 415
 416         brcmu_pkt_buf_free_skb(mypkt);
 417         return err;
 418
 419 }
 420
 421 int
 422 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 423                       uint flags, 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",
 431                   fn, addr, pkt->len);
 432
 433         /* Async not implemented yet */
 434         if (flags & SDIO_REQ_ASYNC)
 435                 return -ENOTSUPP;
 436
 437         if (bar0 != sdiodev->sbwad) {
 438                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 439                 if (err)
 440                         return err;
 441
 442                 sdiodev->sbwad = bar0;
 443         }
 444
 445         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 446
 447         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 448         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 449         if (width == 4)
 450                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 451
 452         return brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
 453                                           addr, pkt);
 454 }
 455
 456 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev *sdiodev, uint rw, u32 addr,
 457                         u8 *buf, uint nbytes)
 458 {
 459         struct sk_buff *mypkt;
 460         bool write = rw ? SDIOH_WRITE : SDIOH_READ;
 461         int err;
 462
 463         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 464         addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 465
 466         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 467         if (!mypkt) {
 468                 brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
 469                           nbytes);
 470                 return -EIO;
 471         }
 472
 473         /* For a write, copy the buffer data into the packet. */
 474         if (write)
 475                 memcpy(mypkt->data, buf, nbytes);
 476
 477         err = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC, write,
 478                                          SDIO_FUNC_1, addr, mypkt);
 479
 480         /* For a read, copy the packet data back to the buffer. */
 481         if (!err && !write)
 482                 memcpy(buf, mypkt->data, nbytes);
 483
 484         brcmu_pkt_buf_free_skb(mypkt);
 485         return err;
 486 }
 487
 488 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
 489 {
 490         char t_func = (char)fn;
 491         brcmf_dbg(TRACE, "Enter\n");
 492
 493         /* issue abort cmd52 command through F0 */
 494         brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
 495                                  SDIO_CCCR_ABORT, &t_func);
 496
 497         brcmf_dbg(TRACE, "Exit\n");
 498         return 0;
 499 }
 500
 501 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
 502 {
 503         u32 regs = 0;
 504         int ret = 0;
 505
 506         ret = brcmf_sdioh_attach(sdiodev);
 507         if (ret)
 508                 goto out;
 509
 510         regs = SI_ENUM_BASE;
 511
 512         /* Report the BAR, to fix if needed */
 513         sdiodev->sbwad = SI_ENUM_BASE;
 514
 515         /* try to attach to the target device */
 516         sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
 517         if (!sdiodev->bus) {
 518                 brcmf_dbg(ERROR, "device attach failed\n");
 519                 ret = -ENODEV;
 520                 goto out;
 521         }
 522
 523 out:
 524         if (ret)
 525                 brcmf_sdio_remove(sdiodev);
 526
 527         return ret;
 528 }
 529 EXPORT_SYMBOL(brcmf_sdio_probe);
 530
 531 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
 532 {
 533         if (sdiodev->bus) {
 534                 brcmf_sdbrcm_disconnect(sdiodev->bus);
 535                 sdiodev->bus = NULL;
 536         }
 537
 538         brcmf_sdioh_detach(sdiodev);
 539
 540         sdiodev->sbwad = 0;
 541
 542         return 0;
 543 }
 544 EXPORT_SYMBOL(brcmf_sdio_remove);
 545
 546 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
 547 {
 548         if (enable)
 549                 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
 550         else
 551                 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
 552 }