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_bus *bus_if = dev_get_drvdata(dev_id);
  46         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
  47
  48         brcmf_dbg(INTR, "oob intr triggered\n");
  49
  50         /*
  51          * out-of-band interrupt is level-triggered which won't
  52          * be cleared until dpc
  53          */
  54         if (sdiodev->irq_en) {
  55                 disable_irq_nosync(irq);
  56                 sdiodev->irq_en = false;
  57         }
  58
  59         brcmf_sdbrcm_isr(sdiodev->bus);
  60
  61         return IRQ_HANDLED;
  62 }
  63
  64 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
  65 {
  66         int ret = 0;
  67         u8 data;
  68         unsigned long flags;
  69
  70         brcmf_dbg(TRACE, "Entering: irq %d\n", sdiodev->irq);
  71
  72         ret = request_irq(sdiodev->irq, brcmf_sdio_irqhandler,
  73                           sdiodev->irq_flags, "brcmf_oob_intr",
  74                           &sdiodev->func[1]->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]->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_bus *bus_if = dev_get_drvdata(&func->dev);
 127         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
 128
 129         brcmf_dbg(INTR, "ib intr triggered\n");
 130
 131         brcmf_sdbrcm_isr(sdiodev->bus);
 132 }
 133
 134 /* dummy handler for SDIO function 2 interrupt */
 135 static void brcmf_sdio_dummy_irqhandler(struct sdio_func *func)
 136 {
 137 }
 138
 139 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
 140 {
 141         brcmf_dbg(TRACE, "Entering\n");
 142
 143         sdio_claim_host(sdiodev->func[1]);
 144         sdio_claim_irq(sdiodev->func[1], brcmf_sdio_irqhandler);
 145         sdio_claim_irq(sdiodev->func[2], brcmf_sdio_dummy_irqhandler);
 146         sdio_release_host(sdiodev->func[1]);
 147
 148         return 0;
 149 }
 150
 151 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
 152 {
 153         brcmf_dbg(TRACE, "Entering\n");
 154
 155         sdio_claim_host(sdiodev->func[1]);
 156         sdio_release_irq(sdiodev->func[2]);
 157         sdio_release_irq(sdiodev->func[1]);
 158         sdio_release_host(sdiodev->func[1]);
 159
 160         return 0;
 161 }
 162 #endif          /* CONFIG_BRCMFMAC_SDIO_OOB */
 163
 164 int
 165 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
 166 {
 167         int err = 0, i;
 168         u8 addr[3];
 169         s32 retry;
 170
 171         addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
 172         addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
 173         addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
 174
 175         for (i = 0; i < 3; i++) {
 176                 retry = 0;
 177                 do {
 178                         if (retry)
 179                                 usleep_range(1000, 2000);
 180                         err = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
 181                                         SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
 182                                         &addr[i]);
 183                 } while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
 184
 185                 if (err) {
 186                         brcmf_err("failed at addr:0x%0x\n",
 187                                   SBSDIO_FUNC1_SBADDRLOW + i);
 188                         break;
 189                 }
 190         }
 191
 192         return err;
 193 }
 194
 195 int
 196 brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
 197                         void *data, bool write)
 198 {
 199         u8 func_num, reg_size;
 200         u32 bar;
 201         s32 retry = 0;
 202         int ret;
 203
 204         /*
 205          * figure out how to read the register based on address range
 206          * 0x00 ~ 0x7FF: function 0 CCCR and FBR
 207          * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
 208          * The rest: function 1 silicon backplane core registers
 209          */
 210         if ((addr & ~REG_F0_REG_MASK) == 0) {
 211                 func_num = SDIO_FUNC_0;
 212                 reg_size = 1;
 213         } else if ((addr & ~REG_F1_MISC_MASK) == 0) {
 214                 func_num = SDIO_FUNC_1;
 215                 reg_size = 1;
 216         } else {
 217                 func_num = SDIO_FUNC_1;
 218                 reg_size = 4;
 219
 220                 /* Set the window for SB core register */
 221                 bar = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 222                 if (bar != sdiodev->sbwad) {
 223                         ret = brcmf_sdcard_set_sbaddr_window(sdiodev, bar);
 224                         if (ret != 0) {
 225                                 memset(data, 0xFF, reg_size);
 226                                 return ret;
 227                         }
 228                         sdiodev->sbwad = bar;
 229                 }
 230                 addr &= SBSDIO_SB_OFT_ADDR_MASK;
 231                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 232         }
 233
 234         do {
 235                 if (!write)
 236                         memset(data, 0, reg_size);
 237                 if (retry)      /* wait for 1 ms till bus get settled down */
 238                         usleep_range(1000, 2000);
 239                 if (reg_size == 1)
 240                         ret = brcmf_sdioh_request_byte(sdiodev, write,
 241                                                        func_num, addr, data);
 242                 else
 243                         ret = brcmf_sdioh_request_word(sdiodev, write,
 244                                                        func_num, addr, data, 4);
 245         } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
 246
 247         if (ret != 0)
 248                 brcmf_err("failed with %d\n", ret);
 249
 250         return ret;
 251 }
 252
 253 u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
 254 {
 255         u8 data;
 256         int retval;
 257
 258         brcmf_dbg(INFO, "addr:0x%08x\n", addr);
 259         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
 260         brcmf_dbg(INFO, "data:0x%02x\n", data);
 261
 262         if (ret)
 263                 *ret = retval;
 264
 265         return data;
 266 }
 267
 268 u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
 269 {
 270         u32 data;
 271         int retval;
 272
 273         brcmf_dbg(INFO, "addr:0x%08x\n", addr);
 274         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
 275         brcmf_dbg(INFO, "data:0x%08x\n", data);
 276
 277         if (ret)
 278                 *ret = retval;
 279
 280         return data;
 281 }
 282
 283 void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
 284                       u8 data, int *ret)
 285 {
 286         int retval;
 287
 288         brcmf_dbg(INFO, "addr:0x%08x, data:0x%02x\n", addr, data);
 289         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
 290
 291         if (ret)
 292                 *ret = retval;
 293 }
 294
 295 void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
 296                       u32 data, int *ret)
 297 {
 298         int retval;
 299
 300         brcmf_dbg(INFO, "addr:0x%08x, data:0x%08x\n", addr, data);
 301         retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
 302
 303         if (ret)
 304                 *ret = retval;
 305 }
 306
 307 static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
 308                                      uint flags, uint width, u32 *addr)
 309 {
 310         uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 311         int err = 0;
 312
 313         /* Async not implemented yet */
 314         if (flags & SDIO_REQ_ASYNC)
 315                 return -ENOTSUPP;
 316
 317         if (bar0 != sdiodev->sbwad) {
 318                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 319                 if (err)
 320                         return err;
 321
 322                 sdiodev->sbwad = bar0;
 323         }
 324
 325         *addr &= SBSDIO_SB_OFT_ADDR_MASK;
 326
 327         if (width == 4)
 328                 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 329
 330         return 0;
 331 }
 332
 333 int
 334 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 335                       uint flags, u8 *buf, uint nbytes)
 336 {
 337         struct sk_buff *mypkt;
 338         int err;
 339
 340         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 341         if (!mypkt) {
 342                 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
 343                           nbytes);
 344                 return -EIO;
 345         }
 346
 347         err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
 348         if (!err)
 349                 memcpy(buf, mypkt->data, nbytes);
 350
 351         brcmu_pkt_buf_free_skb(mypkt);
 352         return err;
 353 }
 354
 355 int
 356 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 357                       uint flags, struct sk_buff *pkt)
 358 {
 359         uint incr_fix;
 360         uint width;
 361         int err = 0;
 362
 363         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 364                   fn, addr, pkt->len);
 365
 366         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 367         err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
 368         if (err)
 369                 goto done;
 370
 371         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 372         err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
 373                                          fn, addr, pkt);
 374
 375 done:
 376         return err;
 377 }
 378
 379 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 380                             uint flags, struct sk_buff_head *pktq)
 381 {
 382         uint incr_fix;
 383         uint width;
 384         int err = 0;
 385
 386         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 387                   fn, addr, pktq->qlen);
 388
 389         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 390         err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
 391         if (err)
 392                 goto done;
 393
 394         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 395         err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
 396                                         pktq);
 397
 398 done:
 399         return err;
 400 }
 401
 402 int
 403 brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 404                       uint flags, u8 *buf, uint nbytes)
 405 {
 406         struct sk_buff *mypkt;
 407         int err;
 408
 409         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 410         if (!mypkt) {
 411                 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
 412                           nbytes);
 413                 return -EIO;
 414         }
 415
 416         memcpy(mypkt->data, buf, nbytes);
 417         err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);
 418
 419         brcmu_pkt_buf_free_skb(mypkt);
 420         return err;
 421
 422 }
 423
 424 int
 425 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
 426                       uint flags, struct sk_buff *pkt)
 427 {
 428         uint incr_fix;
 429         uint width;
 430         uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
 431         int err = 0;
 432
 433         brcmf_dbg(INFO, "fun = %d, addr = 0x%x, size = %d\n",
 434                   fn, addr, pkt->len);
 435
 436         /* Async not implemented yet */
 437         if (flags & SDIO_REQ_ASYNC)
 438                 return -ENOTSUPP;
 439
 440         if (bar0 != sdiodev->sbwad) {
 441                 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
 442                 if (err)
 443                         goto done;
 444
 445                 sdiodev->sbwad = bar0;
 446         }
 447
 448         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 449
 450         incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
 451         width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
 452         if (width == 4)
 453                 addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 454
 455         err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
 456                                          addr, pkt);
 457
 458 done:
 459         return err;
 460 }
 461
 462 int brcmf_sdcard_rwdata(struct brcmf_sdio_dev *sdiodev, uint rw, u32 addr,
 463                         u8 *buf, uint nbytes)
 464 {
 465         struct sk_buff *mypkt;
 466         bool write = rw ? SDIOH_WRITE : SDIOH_READ;
 467         int err;
 468
 469         addr &= SBSDIO_SB_OFT_ADDR_MASK;
 470         addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
 471
 472         mypkt = brcmu_pkt_buf_get_skb(nbytes);
 473         if (!mypkt) {
 474                 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
 475                           nbytes);
 476                 return -EIO;
 477         }
 478
 479         /* For a write, copy the buffer data into the packet. */
 480         if (write)
 481                 memcpy(mypkt->data, buf, nbytes);
 482
 483         err = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC, write,
 484                                          SDIO_FUNC_1, addr, mypkt);
 485
 486         /* For a read, copy the packet data back to the buffer. */
 487         if (!err && !write)
 488                 memcpy(buf, mypkt->data, nbytes);
 489
 490         brcmu_pkt_buf_free_skb(mypkt);
 491         return err;
 492 }
 493
 494 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
 495 {
 496         char t_func = (char)fn;
 497         brcmf_dbg(TRACE, "Enter\n");
 498
 499         /* issue abort cmd52 command through F0 */
 500         brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
 501                                  SDIO_CCCR_ABORT, &t_func);
 502
 503         brcmf_dbg(TRACE, "Exit\n");
 504         return 0;
 505 }
 506
 507 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
 508 {
 509         u32 regs = 0;
 510         int ret = 0;
 511
 512         ret = brcmf_sdioh_attach(sdiodev);
 513         if (ret)
 514                 goto out;
 515
 516         regs = SI_ENUM_BASE;
 517
 518         /* try to attach to the target device */
 519         sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
 520         if (!sdiodev->bus) {
 521                 brcmf_err("device attach failed\n");
 522                 ret = -ENODEV;
 523                 goto out;
 524         }
 525
 526 out:
 527         if (ret)
 528                 brcmf_sdio_remove(sdiodev);
 529
 530         return ret;
 531 }
 532 EXPORT_SYMBOL(brcmf_sdio_probe);
 533
 534 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
 535 {
 536         sdiodev->bus_if->state = BRCMF_BUS_DOWN;
 537
 538         if (sdiodev->bus) {
 539                 brcmf_sdbrcm_disconnect(sdiodev->bus);
 540                 sdiodev->bus = NULL;
 541         }
 542
 543         brcmf_sdioh_detach(sdiodev);
 544
 545         sdiodev->sbwad = 0;
 546
 547         return 0;
 548 }
 549 EXPORT_SYMBOL(brcmf_sdio_remove);
 550
 551 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
 552 {
 553         if (enable)
 554                 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
 555         else
 556                 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
 557 }