drivers/bluetooth/btmrvl_sdio.c

   1 /**
   2  * Marvell BT-over-SDIO driver: SDIO interface related functions.
   3  *
   4  * Copyright (C) 2009, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  *
  15  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  18  * this warranty disclaimer.
  19  **/
  20
  21 #include <linux/firmware.h>
  22 #include <linux/slab.h>
  23
  24 #include <linux/mmc/sdio_ids.h>
  25 #include <linux/mmc/sdio_func.h>
  26
  27 #include <net/bluetooth/bluetooth.h>
  28 #include <net/bluetooth/hci_core.h>
  29
  30 #include "btmrvl_drv.h"
  31 #include "btmrvl_sdio.h"
  32
  33 #define VERSION "1.0"
  34
  35 /* The btmrvl_sdio_remove() callback function is called
  36  * when user removes this module from kernel space or ejects
  37  * the card from the slot. The driver handles these 2 cases
  38  * differently.
  39  * If the user is removing the module, a MODULE_SHUTDOWN_REQ
  40  * command is sent to firmware and interrupt will be disabled.
  41  * If the card is removed, there is no need to send command
  42  * or disable interrupt.
  43  *
  44  * The variable 'user_rmmod' is used to distinguish these two
  45  * scenarios. This flag is initialized as FALSE in case the card
  46  * is removed, and will be set to TRUE for module removal when
  47  * module_exit function is called.
  48  */
  49 static u8 user_rmmod;
  50 static u8 sdio_ireg;
  51
  52 static const struct btmrvl_sdio_device btmrvl_sdio_sd6888 = {
  53         .helper         = "sd8688_helper.bin",
  54         .firmware       = "sd8688.bin",
  55 };
  56
  57 static const struct sdio_device_id btmrvl_sdio_ids[] = {
  58         /* Marvell SD8688 Bluetooth device */
  59         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
  60                         .driver_data = (unsigned long) &btmrvl_sdio_sd6888 },
  61
  62         { }     /* Terminating entry */
  63 };
  64
  65 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
  66
  67 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
  68 {
  69         u8 reg;
  70         int ret;
  71
  72         reg = sdio_readb(card->func, CARD_RX_UNIT_REG, &ret);
  73         if (!ret)
  74                 card->rx_unit = reg;
  75
  76         return ret;
  77 }
  78
  79 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
  80 {
  81         u8 fws0, fws1;
  82         int ret;
  83
  84         *dat = 0;
  85
  86         fws0 = sdio_readb(card->func, CARD_FW_STATUS0_REG, &ret);
  87         if (ret)
  88                 return -EIO;
  89
  90         fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
  91         if (ret)
  92                 return -EIO;
  93
  94         *dat = (((u16) fws1) << 8) | fws0;
  95
  96         return 0;
  97 }
  98
  99 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
 100 {
 101         u8 reg;
 102         int ret;
 103
 104         reg = sdio_readb(card->func, CARD_RX_LEN_REG, &ret);
 105         if (!ret)
 106                 *dat = (u16) reg << card->rx_unit;
 107
 108         return ret;
 109 }
 110
 111 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
 112                                                                 u8 mask)
 113 {
 114         int ret;
 115
 116         sdio_writeb(card->func, mask, HOST_INT_MASK_REG, &ret);
 117         if (ret) {
 118                 BT_ERR("Unable to enable the host interrupt!");
 119                 ret = -EIO;
 120         }
 121
 122         return ret;
 123 }
 124
 125 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
 126                                                                 u8 mask)
 127 {
 128         u8 host_int_mask;
 129         int ret;
 130
 131         host_int_mask = sdio_readb(card->func, HOST_INT_MASK_REG, &ret);
 132         if (ret)
 133                 return -EIO;
 134
 135         host_int_mask &= ~mask;
 136
 137         sdio_writeb(card->func, host_int_mask, HOST_INT_MASK_REG, &ret);
 138         if (ret < 0) {
 139                 BT_ERR("Unable to disable the host interrupt!");
 140                 return -EIO;
 141         }
 142
 143         return 0;
 144 }
 145
 146 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
 147 {
 148         unsigned int tries;
 149         u8 status;
 150         int ret;
 151
 152         for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
 153                 status = sdio_readb(card->func, CARD_STATUS_REG, &ret);
 154                 if (ret)
 155                         goto failed;
 156                 if ((status & bits) == bits)
 157                         return ret;
 158
 159                 udelay(1);
 160         }
 161
 162         ret = -ETIMEDOUT;
 163
 164 failed:
 165         BT_ERR("FAILED! ret=%d", ret);
 166
 167         return ret;
 168 }
 169
 170 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
 171                                                                 int pollnum)
 172 {
 173         int ret = -ETIMEDOUT;
 174         u16 firmwarestat;
 175         unsigned int tries;
 176
 177          /* Wait for firmware to become ready */
 178         for (tries = 0; tries < pollnum; tries++) {
 179                 if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
 180                         continue;
 181
 182                 if (firmwarestat == FIRMWARE_READY) {
 183                         ret = 0;
 184                         break;
 185                 } else {
 186                         msleep(10);
 187                 }
 188         }
 189
 190         return ret;
 191 }
 192
 193 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 194 {
 195         const struct firmware *fw_helper = NULL;
 196         const u8 *helper = NULL;
 197         int ret;
 198         void *tmphlprbuf = NULL;
 199         int tmphlprbufsz, hlprblknow, helperlen;
 200         u8 *helperbuf;
 201         u32 tx_len;
 202
 203         ret = request_firmware(&fw_helper, card->helper,
 204                                                 &card->func->dev);
 205         if ((ret < 0) || !fw_helper) {
 206                 BT_ERR("request_firmware(helper) failed, error code = %d",
 207                                                                         ret);
 208                 ret = -ENOENT;
 209                 goto done;
 210         }
 211
 212         helper = fw_helper->data;
 213         helperlen = fw_helper->size;
 214
 215         BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
 216                                                 helperlen, SDIO_BLOCK_SIZE);
 217
 218         tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 219
 220         tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
 221         if (!tmphlprbuf) {
 222                 BT_ERR("Unable to allocate buffer for helper."
 223                         " Terminating download");
 224                 ret = -ENOMEM;
 225                 goto done;
 226         }
 227
 228         helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
 229
 230         /* Perform helper data transfer */
 231         tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
 232                         - SDIO_HEADER_LEN;
 233         hlprblknow = 0;
 234
 235         do {
 236                 ret = btmrvl_sdio_poll_card_status(card,
 237                                             CARD_IO_READY | DN_LD_CARD_RDY);
 238                 if (ret < 0) {
 239                         BT_ERR("Helper download poll status timeout @ %d",
 240                                 hlprblknow);
 241                         goto done;
 242                 }
 243
 244                 /* Check if there is more data? */
 245                 if (hlprblknow >= helperlen)
 246                         break;
 247
 248                 if (helperlen - hlprblknow < tx_len)
 249                         tx_len = helperlen - hlprblknow;
 250
 251                 /* Little-endian */
 252                 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
 253                 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
 254                 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
 255                 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
 256
 257                 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
 258                                 tx_len);
 259
 260                 /* Now send the data */
 261                 ret = sdio_writesb(card->func, card->ioport, helperbuf,
 262                                 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
 263                 if (ret < 0) {
 264                         BT_ERR("IO error during helper download @ %d",
 265                                 hlprblknow);
 266                         goto done;
 267                 }
 268
 269                 hlprblknow += tx_len;
 270         } while (true);
 271
 272         BT_DBG("Transferring helper image EOF block");
 273
 274         memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
 275
 276         ret = sdio_writesb(card->func, card->ioport, helperbuf,
 277                                                         SDIO_BLOCK_SIZE);
 278         if (ret < 0) {
 279                 BT_ERR("IO error in writing helper image EOF block");
 280                 goto done;
 281         }
 282
 283         ret = 0;
 284
 285 done:
 286         kfree(tmphlprbuf);
 287         if (fw_helper)
 288                 release_firmware(fw_helper);
 289
 290         return ret;
 291 }
 292
 293 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
 294 {
 295         const struct firmware *fw_firmware = NULL;
 296         const u8 *firmware = NULL;
 297         int firmwarelen, tmpfwbufsz, ret;
 298         unsigned int tries, offset;
 299         u8 base0, base1;
 300         void *tmpfwbuf = NULL;
 301         u8 *fwbuf;
 302         u16 len;
 303         int txlen = 0, tx_blocks = 0, count = 0;
 304
 305         ret = request_firmware(&fw_firmware, card->firmware,
 306                                                         &card->func->dev);
 307         if ((ret < 0) || !fw_firmware) {
 308                 BT_ERR("request_firmware(firmware) failed, error code = %d",
 309                                                                         ret);
 310                 ret = -ENOENT;
 311                 goto done;
 312         }
 313
 314         firmware = fw_firmware->data;
 315         firmwarelen = fw_firmware->size;
 316
 317         BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
 318
 319         tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 320         tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
 321         if (!tmpfwbuf) {
 322                 BT_ERR("Unable to allocate buffer for firmware."
 323                        " Terminating download");
 324                 ret = -ENOMEM;
 325                 goto done;
 326         }
 327
 328         /* Ensure aligned firmware buffer */
 329         fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
 330
 331         /* Perform firmware data transfer */
 332         offset = 0;
 333         do {
 334                 ret = btmrvl_sdio_poll_card_status(card,
 335                                         CARD_IO_READY | DN_LD_CARD_RDY);
 336                 if (ret < 0) {
 337                         BT_ERR("FW download with helper poll status"
 338                                                 " timeout @ %d", offset);
 339                         goto done;
 340                 }
 341
 342                 /* Check if there is more data ? */
 343                 if (offset >= firmwarelen)
 344                         break;
 345
 346                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 347                         base0 = sdio_readb(card->func,
 348                                         SQ_READ_BASE_ADDRESS_A0_REG, &ret);
 349                         if (ret) {
 350                                 BT_ERR("BASE0 register read failed:"
 351                                         " base0 = 0x%04X(%d)."
 352                                         " Terminating download",
 353                                         base0, base0);
 354                                 ret = -EIO;
 355                                 goto done;
 356                         }
 357                         base1 = sdio_readb(card->func,
 358                                         SQ_READ_BASE_ADDRESS_A1_REG, &ret);
 359                         if (ret) {
 360                                 BT_ERR("BASE1 register read failed:"
 361                                         " base1 = 0x%04X(%d)."
 362                                         " Terminating download",
 363                                         base1, base1);
 364                                 ret = -EIO;
 365                                 goto done;
 366                         }
 367
 368                         len = (((u16) base1) << 8) | base0;
 369                         if (len)
 370                                 break;
 371
 372                         udelay(10);
 373                 }
 374
 375                 if (!len)
 376                         break;
 377                 else if (len > BTM_UPLD_SIZE) {
 378                         BT_ERR("FW download failure @%d, invalid length %d",
 379                                                                 offset, len);
 380                         ret = -EINVAL;
 381                         goto done;
 382                 }
 383
 384                 txlen = len;
 385
 386                 if (len & BIT(0)) {
 387                         count++;
 388                         if (count > MAX_WRITE_IOMEM_RETRY) {
 389                                 BT_ERR("FW download failure @%d, "
 390                                         "over max retry count", offset);
 391                                 ret = -EIO;
 392                                 goto done;
 393                         }
 394                         BT_ERR("FW CRC error indicated by the helper: "
 395                                 "len = 0x%04X, txlen = %d", len, txlen);
 396                         len &= ~BIT(0);
 397                         /* Set txlen to 0 so as to resend from same offset */
 398                         txlen = 0;
 399                 } else {
 400                         count = 0;
 401
 402                         /* Last block ? */
 403                         if (firmwarelen - offset < txlen)
 404                                 txlen = firmwarelen - offset;
 405
 406                         tx_blocks =
 407                             (txlen + SDIO_BLOCK_SIZE - 1) / SDIO_BLOCK_SIZE;
 408
 409                         memcpy(fwbuf, &firmware[offset], txlen);
 410                 }
 411
 412                 ret = sdio_writesb(card->func, card->ioport, fwbuf,
 413                                         tx_blocks * SDIO_BLOCK_SIZE);
 414
 415                 if (ret < 0) {
 416                         BT_ERR("FW download, writesb(%d) failed @%d",
 417                                                         count, offset);
 418                         sdio_writeb(card->func, HOST_CMD53_FIN, CONFIG_REG,
 419                                                                         &ret);
 420                         if (ret)
 421                                 BT_ERR("writeb failed (CFG)");
 422                 }
 423
 424                 offset += txlen;
 425         } while (true);
 426
 427         BT_DBG("FW download over, size %d bytes", offset);
 428
 429         ret = 0;
 430
 431 done:
 432         kfree(tmpfwbuf);
 433
 434         if (fw_firmware)
 435                 release_firmware(fw_firmware);
 436
 437         return ret;
 438 }
 439
 440 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 441 {
 442         u16 buf_len = 0;
 443         int ret, buf_block_len, blksz;
 444         struct sk_buff *skb = NULL;
 445         u32 type;
 446         u8 *payload = NULL;
 447         struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
 448         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 449
 450         if (!card || !card->func) {
 451                 BT_ERR("card or function is NULL!");
 452                 ret = -EINVAL;
 453                 goto exit;
 454         }
 455
 456         /* Read the length of data to be transferred */
 457         ret = btmrvl_sdio_read_rx_len(card, &buf_len);
 458         if (ret < 0) {
 459                 BT_ERR("read rx_len failed");
 460                 ret = -EIO;
 461                 goto exit;
 462         }
 463
 464         blksz = SDIO_BLOCK_SIZE;
 465         buf_block_len = (buf_len + blksz - 1) / blksz;
 466
 467         if (buf_len <= SDIO_HEADER_LEN
 468                         || (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
 469                 BT_ERR("invalid packet length: %d", buf_len);
 470                 ret = -EINVAL;
 471                 goto exit;
 472         }
 473
 474         /* Allocate buffer */
 475         skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
 476                                                                 GFP_ATOMIC);
 477         if (skb == NULL) {
 478                 BT_ERR("No free skb");
 479                 goto exit;
 480         }
 481
 482         if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 483                 skb_put(skb, (unsigned long) skb->data &
 484                                         (BTSDIO_DMA_ALIGN - 1));
 485                 skb_pull(skb, (unsigned long) skb->data &
 486                                         (BTSDIO_DMA_ALIGN - 1));
 487         }
 488
 489         payload = skb->data;
 490
 491         ret = sdio_readsb(card->func, payload, card->ioport,
 492                           buf_block_len * blksz);
 493         if (ret < 0) {
 494                 BT_ERR("readsb failed: %d", ret);
 495                 ret = -EIO;
 496                 goto exit;
 497         }
 498
 499         /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
 500          * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
 501          */
 502
 503         buf_len = payload[0];
 504         buf_len |= (u16) payload[1] << 8;
 505         type = payload[3];
 506
 507         switch (type) {
 508         case HCI_ACLDATA_PKT:
 509         case HCI_SCODATA_PKT:
 510         case HCI_EVENT_PKT:
 511                 bt_cb(skb)->pkt_type = type;
 512                 skb->dev = (void *)hdev;
 513                 skb_put(skb, buf_len);
 514                 skb_pull(skb, SDIO_HEADER_LEN);
 515
 516                 if (type == HCI_EVENT_PKT)
 517                         btmrvl_check_evtpkt(priv, skb);
 518
 519                 hci_recv_frame(skb);
 520                 hdev->stat.byte_rx += buf_len;
 521                 break;
 522
 523         case MRVL_VENDOR_PKT:
 524                 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
 525                 skb->dev = (void *)hdev;
 526                 skb_put(skb, buf_len);
 527                 skb_pull(skb, SDIO_HEADER_LEN);
 528
 529                 if (btmrvl_process_event(priv, skb))
 530                         hci_recv_frame(skb);
 531
 532                 hdev->stat.byte_rx += buf_len;
 533                 break;
 534
 535         default:
 536                 BT_ERR("Unknown packet type:%d", type);
 537                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
 538                                                 blksz * buf_block_len);
 539
 540                 kfree_skb(skb);
 541                 skb = NULL;
 542                 break;
 543         }
 544
 545 exit:
 546         if (ret) {
 547                 hdev->stat.err_rx++;
 548                 if (skb)
 549                         kfree_skb(skb);
 550         }
 551
 552         return ret;
 553 }
 554
 555 static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
 556 {
 557         ulong flags;
 558         u8 ireg;
 559         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 560
 561         spin_lock_irqsave(&priv->driver_lock, flags);
 562         ireg = sdio_ireg;
 563         sdio_ireg = 0;
 564         spin_unlock_irqrestore(&priv->driver_lock, flags);
 565
 566         sdio_claim_host(card->func);
 567         if (ireg & DN_LD_HOST_INT_STATUS) {
 568                 if (priv->btmrvl_dev.tx_dnld_rdy)
 569                         BT_DBG("tx_done already received: "
 570                                 " int_status=0x%x", ireg);
 571                 else
 572                         priv->btmrvl_dev.tx_dnld_rdy = true;
 573         }
 574
 575         if (ireg & UP_LD_HOST_INT_STATUS)
 576                 btmrvl_sdio_card_to_host(priv);
 577
 578         sdio_release_host(card->func);
 579
 580         return 0;
 581 }
 582
 583 static void btmrvl_sdio_interrupt(struct sdio_func *func)
 584 {
 585         struct btmrvl_private *priv;
 586         struct btmrvl_sdio_card *card;
 587         ulong flags;
 588         u8 ireg = 0;
 589         int ret;
 590
 591         card = sdio_get_drvdata(func);
 592         if (!card || !card->priv) {
 593                 BT_ERR("sbi_interrupt(%p) card or priv is "
 594                                 "NULL, card=%p\n", func, card);
 595                 return;
 596         }
 597
 598         priv = card->priv;
 599
 600         ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret);
 601         if (ret) {
 602                 BT_ERR("sdio_readb: read int status register failed");
 603                 return;
 604         }
 605
 606         if (ireg != 0) {
 607                 /*
 608                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 609                  * Clear the interrupt status register and re-enable the
 610                  * interrupt.
 611                  */
 612                 BT_DBG("ireg = 0x%x", ireg);
 613
 614                 sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
 615                                         UP_LD_HOST_INT_STATUS),
 616                                 HOST_INTSTATUS_REG, &ret);
 617                 if (ret) {
 618                         BT_ERR("sdio_writeb: clear int status register failed");
 619                         return;
 620                 }
 621         }
 622
 623         spin_lock_irqsave(&priv->driver_lock, flags);
 624         sdio_ireg |= ireg;
 625         spin_unlock_irqrestore(&priv->driver_lock, flags);
 626
 627         btmrvl_interrupt(priv);
 628 }
 629
 630 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
 631 {
 632         struct sdio_func *func;
 633         u8 reg;
 634         int ret = 0;
 635
 636         if (!card || !card->func) {
 637                 BT_ERR("Error: card or function is NULL!");
 638                 ret = -EINVAL;
 639                 goto failed;
 640         }
 641
 642         func = card->func;
 643
 644         sdio_claim_host(func);
 645
 646         ret = sdio_enable_func(func);
 647         if (ret) {
 648                 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
 649                 ret = -EIO;
 650                 goto release_host;
 651         }
 652
 653         ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
 654         if (ret) {
 655                 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
 656                 ret = -EIO;
 657                 goto disable_func;
 658         }
 659
 660         ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
 661         if (ret) {
 662                 BT_ERR("cannot set SDIO block size");
 663                 ret = -EIO;
 664                 goto release_irq;
 665         }
 666
 667         reg = sdio_readb(func, IO_PORT_0_REG, &ret);
 668         if (ret < 0) {
 669                 ret = -EIO;
 670                 goto release_irq;
 671         }
 672
 673         card->ioport = reg;
 674
 675         reg = sdio_readb(func, IO_PORT_1_REG, &ret);
 676         if (ret < 0) {
 677                 ret = -EIO;
 678                 goto release_irq;
 679         }
 680
 681         card->ioport |= (reg << 8);
 682
 683         reg = sdio_readb(func, IO_PORT_2_REG, &ret);
 684         if (ret < 0) {
 685                 ret = -EIO;
 686                 goto release_irq;
 687         }
 688
 689         card->ioport |= (reg << 16);
 690
 691         BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
 692
 693         sdio_set_drvdata(func, card);
 694
 695         sdio_release_host(func);
 696
 697         return 0;
 698
 699 release_irq:
 700         sdio_release_irq(func);
 701
 702 disable_func:
 703         sdio_disable_func(func);
 704
 705 release_host:
 706         sdio_release_host(func);
 707
 708 failed:
 709         return ret;
 710 }
 711
 712 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
 713 {
 714         if (card && card->func) {
 715                 sdio_claim_host(card->func);
 716                 sdio_release_irq(card->func);
 717                 sdio_disable_func(card->func);
 718                 sdio_release_host(card->func);
 719                 sdio_set_drvdata(card->func, NULL);
 720         }
 721
 722         return 0;
 723 }
 724
 725 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
 726 {
 727         int ret;
 728
 729         if (!card || !card->func)
 730                 return -EINVAL;
 731
 732         sdio_claim_host(card->func);
 733
 734         ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
 735
 736         btmrvl_sdio_get_rx_unit(card);
 737
 738         sdio_release_host(card->func);
 739
 740         return ret;
 741 }
 742
 743 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
 744 {
 745         int ret;
 746
 747         if (!card || !card->func)
 748                 return -EINVAL;
 749
 750         sdio_claim_host(card->func);
 751
 752         ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
 753
 754         sdio_release_host(card->func);
 755
 756         return ret;
 757 }
 758
 759 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
 760                                 u8 *payload, u16 nb)
 761 {
 762         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 763         int ret = 0;
 764         int buf_block_len;
 765         int blksz;
 766         int i = 0;
 767         u8 *buf = NULL;
 768         void *tmpbuf = NULL;
 769         int tmpbufsz;
 770
 771         if (!card || !card->func) {
 772                 BT_ERR("card or function is NULL!");
 773                 return -EINVAL;
 774         }
 775
 776         buf = payload;
 777         if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
 778                 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
 779                 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
 780                 if (!tmpbuf)
 781                         return -ENOMEM;
 782                 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
 783                 memcpy(buf, payload, nb);
 784         }
 785
 786         blksz = SDIO_BLOCK_SIZE;
 787         buf_block_len = (nb + blksz - 1) / blksz;
 788
 789         sdio_claim_host(card->func);
 790
 791         do {
 792                 /* Transfer data to card */
 793                 ret = sdio_writesb(card->func, card->ioport, buf,
 794                                    buf_block_len * blksz);
 795                 if (ret < 0) {
 796                         i++;
 797                         BT_ERR("i=%d writesb failed: %d", i, ret);
 798                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
 799                                                 payload, nb);
 800                         ret = -EIO;
 801                         if (i > MAX_WRITE_IOMEM_RETRY)
 802                                 goto exit;
 803                 }
 804         } while (ret);
 805
 806         priv->btmrvl_dev.tx_dnld_rdy = false;
 807
 808 exit:
 809         sdio_release_host(card->func);
 810         kfree(tmpbuf);
 811
 812         return ret;
 813 }
 814
 815 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
 816 {
 817         int ret = 0;
 818
 819         if (!card || !card->func) {
 820                 BT_ERR("card or function is NULL!");
 821                 return -EINVAL;
 822         }
 823         sdio_claim_host(card->func);
 824
 825         if (!btmrvl_sdio_verify_fw_download(card, 1)) {
 826                 BT_DBG("Firmware already downloaded!");
 827                 goto done;
 828         }
 829
 830         ret = btmrvl_sdio_download_helper(card);
 831         if (ret) {
 832                 BT_ERR("Failed to download helper!");
 833                 ret = -EIO;
 834                 goto done;
 835         }
 836
 837         if (btmrvl_sdio_download_fw_w_helper(card)) {
 838                 BT_ERR("Failed to download firmware!");
 839                 ret = -EIO;
 840                 goto done;
 841         }
 842
 843         if (btmrvl_sdio_verify_fw_download(card, MAX_POLL_TRIES)) {
 844                 BT_ERR("FW failed to be active in time!");
 845                 ret = -ETIMEDOUT;
 846                 goto done;
 847         }
 848
 849 done:
 850         sdio_release_host(card->func);
 851
 852         return ret;
 853 }
 854
 855 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
 856 {
 857         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 858         int ret = 0;
 859
 860         if (!card || !card->func) {
 861                 BT_ERR("card or function is NULL!");
 862                 return -EINVAL;
 863         }
 864
 865         sdio_claim_host(card->func);
 866
 867         sdio_writeb(card->func, HOST_POWER_UP, CONFIG_REG, &ret);
 868
 869         sdio_release_host(card->func);
 870
 871         BT_DBG("wake up firmware");
 872
 873         return ret;
 874 }
 875
 876 static int btmrvl_sdio_probe(struct sdio_func *func,
 877                                         const struct sdio_device_id *id)
 878 {
 879         int ret = 0;
 880         struct btmrvl_private *priv = NULL;
 881         struct btmrvl_sdio_card *card = NULL;
 882
 883         BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
 884                         id->vendor, id->device, id->class, func->num);
 885
 886         card = kzalloc(sizeof(*card), GFP_KERNEL);
 887         if (!card) {
 888                 ret = -ENOMEM;
 889                 goto done;
 890         }
 891
 892         card->func = func;
 893
 894         if (id->driver_data) {
 895                 struct btmrvl_sdio_device *data = (void *) id->driver_data;
 896                 card->helper   = data->helper;
 897                 card->firmware = data->firmware;
 898         }
 899
 900         if (btmrvl_sdio_register_dev(card) < 0) {
 901                 BT_ERR("Failed to register BT device!");
 902                 ret = -ENODEV;
 903                 goto free_card;
 904         }
 905
 906         /* Disable the interrupts on the card */
 907         btmrvl_sdio_disable_host_int(card);
 908
 909         if (btmrvl_sdio_download_fw(card)) {
 910                 BT_ERR("Downloading firmware failed!");
 911                 ret = -ENODEV;
 912                 goto unreg_dev;
 913         }
 914
 915         msleep(100);
 916
 917         btmrvl_sdio_enable_host_int(card);
 918
 919         priv = btmrvl_add_card(card);
 920         if (!priv) {
 921                 BT_ERR("Initializing card failed!");
 922                 ret = -ENODEV;
 923                 goto disable_host_int;
 924         }
 925
 926         card->priv = priv;
 927
 928         /* Initialize the interface specific function pointers */
 929         priv->hw_host_to_card = btmrvl_sdio_host_to_card;
 930         priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
 931         priv->hw_process_int_status = btmrvl_sdio_process_int_status;
 932
 933         if (btmrvl_register_hdev(priv)) {
 934                 BT_ERR("Register hdev failed!");
 935                 ret = -ENODEV;
 936                 goto disable_host_int;
 937         }
 938
 939         priv->btmrvl_dev.psmode = 1;
 940         btmrvl_enable_ps(priv);
 941
 942         return 0;
 943
 944 disable_host_int:
 945         btmrvl_sdio_disable_host_int(card);
 946 unreg_dev:
 947         btmrvl_sdio_unregister_dev(card);
 948 free_card:
 949         kfree(card);
 950 done:
 951         return ret;
 952 }
 953
 954 static void btmrvl_sdio_remove(struct sdio_func *func)
 955 {
 956         struct btmrvl_sdio_card *card;
 957
 958         if (func) {
 959                 card = sdio_get_drvdata(func);
 960                 if (card) {
 961                         /* Send SHUTDOWN command & disable interrupt
 962                          * if user removes the module.
 963                          */
 964                         if (user_rmmod) {
 965                                 btmrvl_send_module_cfg_cmd(card->priv,
 966                                                         MODULE_SHUTDOWN_REQ);
 967                                 btmrvl_sdio_disable_host_int(card);
 968                         }
 969                         BT_DBG("unregester dev");
 970                         btmrvl_sdio_unregister_dev(card);
 971                         btmrvl_remove_card(card->priv);
 972                         kfree(card);
 973                 }
 974         }
 975 }
 976
 977 static struct sdio_driver bt_mrvl_sdio = {
 978         .name           = "btmrvl_sdio",
 979         .id_table       = btmrvl_sdio_ids,
 980         .probe          = btmrvl_sdio_probe,
 981         .remove         = btmrvl_sdio_remove,
 982 };
 983
 984 static int __init btmrvl_sdio_init_module(void)
 985 {
 986         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
 987                 BT_ERR("SDIO Driver Registration Failed");
 988                 return -ENODEV;
 989         }
 990
 991         /* Clear the flag in case user removes the card. */
 992         user_rmmod = 0;
 993
 994         return 0;
 995 }
 996
 997 static void __exit btmrvl_sdio_exit_module(void)
 998 {
 999         /* Set the flag as user is removing this module. */
1000         user_rmmod = 1;
1001
1002         sdio_unregister_driver(&bt_mrvl_sdio);
1003 }
1004
1005 module_init(btmrvl_sdio_init_module);
1006 module_exit(btmrvl_sdio_exit_module);
1007
1008 MODULE_AUTHOR("Marvell International Ltd.");
1009 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1010 MODULE_VERSION(VERSION);
1011 MODULE_LICENSE("GPL v2");
1012 MODULE_FIRMWARE("sd8688_helper.bin");
1013 MODULE_FIRMWARE("sd8688.bin");