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
  23 #include <linux/mmc/sdio_ids.h>
  24 #include <linux/mmc/sdio_func.h>
  25
  26 #include <net/bluetooth/bluetooth.h>
  27 #include <net/bluetooth/hci_core.h>
  28
  29 #include "btmrvl_drv.h"
  30 #include "btmrvl_sdio.h"
  31
  32 #define VERSION "1.0"
  33
  34 /* The btmrvl_sdio_remove() callback function is called
  35  * when user removes this module from kernel space or ejects
  36  * the card from the slot. The driver handles these 2 cases
  37  * differently.
  38  * If the user is removing the module, a MODULE_SHUTDOWN_REQ
  39  * command is sent to firmware and interrupt will be disabled.
  40  * If the card is removed, there is no need to send command
  41  * or disable interrupt.
  42  *
  43  * The variable 'user_rmmod' is used to distinguish these two
  44  * scenarios. This flag is initialized as FALSE in case the card
  45  * is removed, and will be set to TRUE for module removal when
  46  * module_exit function is called.
  47  */
  48 static u8 user_rmmod;
  49
  50 static const struct btmrvl_sdio_device btmrvl_sdio_sd6888 = {
  51         .helper         = "sd8688_helper.bin",
  52         .firmware       = "sd8688.bin",
  53 };
  54
  55 static const struct sdio_device_id btmrvl_sdio_ids[] = {
  56         /* Marvell SD8688 Bluetooth device */
  57         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
  58                         .driver_data = (unsigned long) &btmrvl_sdio_sd6888 },
  59
  60         { }     /* Terminating entry */
  61 };
  62
  63 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
  64
  65 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
  66 {
  67         u8 reg;
  68         int ret;
  69
  70         reg = sdio_readb(card->func, CARD_RX_UNIT_REG, &ret);
  71         if (!ret)
  72                 card->rx_unit = reg;
  73
  74         return ret;
  75 }
  76
  77 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
  78 {
  79         u8 fws0, fws1;
  80         int ret;
  81
  82         *dat = 0;
  83
  84         fws0 = sdio_readb(card->func, CARD_FW_STATUS0_REG, &ret);
  85
  86         if (!ret)
  87                 fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
  88
  89         if (ret)
  90                 return -EIO;
  91
  92         *dat = (((u16) fws1) << 8) | fws0;
  93
  94         return 0;
  95 }
  96
  97 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
  98 {
  99         u8 reg;
 100         int ret;
 101
 102         reg = sdio_readb(card->func, CARD_RX_LEN_REG, &ret);
 103         if (!ret)
 104                 *dat = (u16) reg << card->rx_unit;
 105
 106         return ret;
 107 }
 108
 109 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
 110                                                                 u8 mask)
 111 {
 112         int ret;
 113
 114         sdio_writeb(card->func, mask, HOST_INT_MASK_REG, &ret);
 115         if (ret) {
 116                 BT_ERR("Unable to enable the host interrupt!");
 117                 ret = -EIO;
 118         }
 119
 120         return ret;
 121 }
 122
 123 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
 124                                                                 u8 mask)
 125 {
 126         u8 host_int_mask;
 127         int ret;
 128
 129         host_int_mask = sdio_readb(card->func, HOST_INT_MASK_REG, &ret);
 130         if (ret)
 131                 return -EIO;
 132
 133         host_int_mask &= ~mask;
 134
 135         sdio_writeb(card->func, host_int_mask, HOST_INT_MASK_REG, &ret);
 136         if (ret < 0) {
 137                 BT_ERR("Unable to disable the host interrupt!");
 138                 return -EIO;
 139         }
 140
 141         return 0;
 142 }
 143
 144 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
 145 {
 146         unsigned int tries;
 147         u8 status;
 148         int ret;
 149
 150         for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
 151                 status = sdio_readb(card->func, CARD_STATUS_REG, &ret);
 152                 if (ret)
 153                         goto failed;
 154                 if ((status & bits) == bits)
 155                         return ret;
 156
 157                 udelay(1);
 158         }
 159
 160         ret = -ETIMEDOUT;
 161
 162 failed:
 163         BT_ERR("FAILED! ret=%d", ret);
 164
 165         return ret;
 166 }
 167
 168 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
 169                                                                 int pollnum)
 170 {
 171         int ret = -ETIMEDOUT;
 172         u16 firmwarestat;
 173         unsigned int tries;
 174
 175          /* Wait for firmware to become ready */
 176         for (tries = 0; tries < pollnum; tries++) {
 177                 if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
 178                         continue;
 179
 180                 if (firmwarestat == FIRMWARE_READY) {
 181                         ret = 0;
 182                         break;
 183                 } else {
 184                         msleep(10);
 185                 }
 186         }
 187
 188         return ret;
 189 }
 190
 191 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 192 {
 193         const struct firmware *fw_helper = NULL;
 194         const u8 *helper = NULL;
 195         int ret;
 196         void *tmphlprbuf = NULL;
 197         int tmphlprbufsz, hlprblknow, helperlen;
 198         u8 *helperbuf;
 199         u32 tx_len;
 200
 201         ret = request_firmware(&fw_helper, card->helper,
 202                                                 &card->func->dev);
 203         if ((ret < 0) || !fw_helper) {
 204                 BT_ERR("request_firmware(helper) failed, error code = %d",
 205                                                                         ret);
 206                 ret = -ENOENT;
 207                 goto done;
 208         }
 209
 210         helper = fw_helper->data;
 211         helperlen = fw_helper->size;
 212
 213         BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
 214                                                 helperlen, SDIO_BLOCK_SIZE);
 215
 216         tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 217
 218         tmphlprbuf = kmalloc(tmphlprbufsz, GFP_KERNEL);
 219         if (!tmphlprbuf) {
 220                 BT_ERR("Unable to allocate buffer for helper."
 221                         " Terminating download");
 222                 ret = -ENOMEM;
 223                 goto done;
 224         }
 225
 226         memset(tmphlprbuf, 0, tmphlprbufsz);
 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 = kmalloc(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         memset(tmpfwbuf, 0, tmpfwbufsz);
 329
 330         /* Ensure aligned firmware buffer */
 331         fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
 332
 333         /* Perform firmware data transfer */
 334         offset = 0;
 335         do {
 336                 ret = btmrvl_sdio_poll_card_status(card,
 337                                         CARD_IO_READY | DN_LD_CARD_RDY);
 338                 if (ret < 0) {
 339                         BT_ERR("FW download with helper poll status"
 340                                                 " timeout @ %d", offset);
 341                         goto done;
 342                 }
 343
 344                 /* Check if there is more data ? */
 345                 if (offset >= firmwarelen)
 346                         break;
 347
 348                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 349                         base0 = sdio_readb(card->func,
 350                                         SQ_READ_BASE_ADDRESS_A0_REG, &ret);
 351                         if (ret) {
 352                                 BT_ERR("BASE0 register read failed:"
 353                                         " base0 = 0x%04X(%d)."
 354                                         " Terminating download",
 355                                         base0, base0);
 356                                 ret = -EIO;
 357                                 goto done;
 358                         }
 359                         base1 = sdio_readb(card->func,
 360                                         SQ_READ_BASE_ADDRESS_A1_REG, &ret);
 361                         if (ret) {
 362                                 BT_ERR("BASE1 register read failed:"
 363                                         " base1 = 0x%04X(%d)."
 364                                         " Terminating download",
 365                                         base1, base1);
 366                                 ret = -EIO;
 367                                 goto done;
 368                         }
 369
 370                         len = (((u16) base1) << 8) | base0;
 371                         if (len)
 372                                 break;
 373
 374                         udelay(10);
 375                 }
 376
 377                 if (!len)
 378                         break;
 379                 else if (len > BTM_UPLD_SIZE) {
 380                         BT_ERR("FW download failure @%d, invalid length %d",
 381                                                                 offset, len);
 382                         ret = -EINVAL;
 383                         goto done;
 384                 }
 385
 386                 txlen = len;
 387
 388                 if (len & BIT(0)) {
 389                         count++;
 390                         if (count > MAX_WRITE_IOMEM_RETRY) {
 391                                 BT_ERR("FW download failure @%d, "
 392                                         "over max retry count", offset);
 393                                 ret = -EIO;
 394                                 goto done;
 395                         }
 396                         BT_ERR("FW CRC error indicated by the helper: "
 397                                 "len = 0x%04X, txlen = %d", len, txlen);
 398                         len &= ~BIT(0);
 399                         /* Set txlen to 0 so as to resend from same offset */
 400                         txlen = 0;
 401                 } else {
 402                         count = 0;
 403
 404                         /* Last block ? */
 405                         if (firmwarelen - offset < txlen)
 406                                 txlen = firmwarelen - offset;
 407
 408                         tx_blocks =
 409                             (txlen + SDIO_BLOCK_SIZE - 1) / SDIO_BLOCK_SIZE;
 410
 411                         memcpy(fwbuf, &firmware[offset], txlen);
 412                 }
 413
 414                 ret = sdio_writesb(card->func, card->ioport, fwbuf,
 415                                         tx_blocks * SDIO_BLOCK_SIZE);
 416
 417                 if (ret < 0) {
 418                         BT_ERR("FW download, writesb(%d) failed @%d",
 419                                                         count, offset);
 420                         sdio_writeb(card->func, HOST_CMD53_FIN, CONFIG_REG,
 421                                                                         &ret);
 422                         if (ret)
 423                                 BT_ERR("writeb failed (CFG)");
 424                 }
 425
 426                 offset += txlen;
 427         } while (true);
 428
 429         BT_DBG("FW download over, size %d bytes", offset);
 430
 431         ret = 0;
 432
 433 done:
 434         kfree(tmpfwbuf);
 435
 436         if (fw_firmware)
 437                 release_firmware(fw_firmware);
 438
 439         return ret;
 440 }
 441
 442 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 443 {
 444         u16 buf_len = 0;
 445         int ret, buf_block_len, blksz;
 446         struct sk_buff *skb = NULL;
 447         u32 type;
 448         u8 *payload = NULL;
 449         struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
 450         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 451
 452         if (!card || !card->func) {
 453                 BT_ERR("card or function is NULL!");
 454                 ret = -EINVAL;
 455                 goto exit;
 456         }
 457
 458         /* Read the length of data to be transferred */
 459         ret = btmrvl_sdio_read_rx_len(card, &buf_len);
 460         if (ret < 0) {
 461                 BT_ERR("read rx_len failed");
 462                 ret = -EIO;
 463                 goto exit;
 464         }
 465
 466         blksz = SDIO_BLOCK_SIZE;
 467         buf_block_len = (buf_len + blksz - 1) / blksz;
 468
 469         if (buf_len <= SDIO_HEADER_LEN
 470                         || (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
 471                 BT_ERR("invalid packet length: %d", buf_len);
 472                 ret = -EINVAL;
 473                 goto exit;
 474         }
 475
 476         /* Allocate buffer */
 477         skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
 478                                                                 GFP_ATOMIC);
 479         if (skb == NULL) {
 480                 BT_ERR("No free skb");
 481                 goto exit;
 482         }
 483
 484         if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 485                 skb_put(skb, (unsigned long) skb->data &
 486                                         (BTSDIO_DMA_ALIGN - 1));
 487                 skb_pull(skb, (unsigned long) skb->data &
 488                                         (BTSDIO_DMA_ALIGN - 1));
 489         }
 490
 491         payload = skb->data;
 492
 493         ret = sdio_readsb(card->func, payload, card->ioport,
 494                           buf_block_len * blksz);
 495         if (ret < 0) {
 496                 BT_ERR("readsb failed: %d", ret);
 497                 ret = -EIO;
 498                 goto exit;
 499         }
 500
 501         /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
 502          * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
 503          */
 504
 505         buf_len = payload[0];
 506         buf_len |= (u16) payload[1] << 8;
 507         type = payload[3];
 508
 509         switch (type) {
 510         case HCI_ACLDATA_PKT:
 511         case HCI_SCODATA_PKT:
 512         case HCI_EVENT_PKT:
 513                 bt_cb(skb)->pkt_type = type;
 514                 skb->dev = (void *)hdev;
 515                 skb_put(skb, buf_len);
 516                 skb_pull(skb, SDIO_HEADER_LEN);
 517
 518                 if (type == HCI_EVENT_PKT)
 519                         btmrvl_check_evtpkt(priv, skb);
 520
 521                 hci_recv_frame(skb);
 522                 hdev->stat.byte_rx += buf_len;
 523                 break;
 524
 525         case MRVL_VENDOR_PKT:
 526                 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
 527                 skb->dev = (void *)hdev;
 528                 skb_put(skb, buf_len);
 529                 skb_pull(skb, SDIO_HEADER_LEN);
 530
 531                 if (btmrvl_process_event(priv, skb))
 532                         hci_recv_frame(skb);
 533
 534                 hdev->stat.byte_rx += buf_len;
 535                 break;
 536
 537         default:
 538                 BT_ERR("Unknow packet type:%d", type);
 539                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
 540                                                 blksz * buf_block_len);
 541
 542                 kfree_skb(skb);
 543                 skb = NULL;
 544                 break;
 545         }
 546
 547 exit:
 548         if (ret) {
 549                 hdev->stat.err_rx++;
 550                 if (skb)
 551                         kfree_skb(skb);
 552         }
 553
 554         return ret;
 555 }
 556
 557 static int btmrvl_sdio_get_int_status(struct btmrvl_private *priv, u8 * ireg)
 558 {
 559         int ret;
 560         u8 sdio_ireg = 0;
 561         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 562
 563         *ireg = 0;
 564
 565         sdio_ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret);
 566         if (ret) {
 567                 BT_ERR("sdio_readb: read int status register failed");
 568                 ret = -EIO;
 569                 goto done;
 570         }
 571
 572         if (sdio_ireg != 0) {
 573                 /*
 574                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 575                  * Clear the interrupt status register and re-enable the
 576                  * interrupt.
 577                  */
 578                 BT_DBG("sdio_ireg = 0x%x", sdio_ireg);
 579
 580                 sdio_writeb(card->func, ~(sdio_ireg) & (DN_LD_HOST_INT_STATUS |
 581                                                         UP_LD_HOST_INT_STATUS),
 582                             HOST_INTSTATUS_REG, &ret);
 583                 if (ret) {
 584                         BT_ERR("sdio_writeb: clear int status register "
 585                                 "failed");
 586                         ret = -EIO;
 587                         goto done;
 588                 }
 589         }
 590
 591         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
 592                 if (priv->btmrvl_dev.tx_dnld_rdy)
 593                         BT_DBG("tx_done already received: "
 594                                 " int_status=0x%x", sdio_ireg);
 595                 else
 596                         priv->btmrvl_dev.tx_dnld_rdy = true;
 597         }
 598
 599         if (sdio_ireg & UP_LD_HOST_INT_STATUS)
 600                 btmrvl_sdio_card_to_host(priv);
 601
 602         *ireg = sdio_ireg;
 603
 604         ret = 0;
 605
 606 done:
 607         return ret;
 608 }
 609
 610 static void btmrvl_sdio_interrupt(struct sdio_func *func)
 611 {
 612         struct btmrvl_private *priv;
 613         struct hci_dev *hcidev;
 614         struct btmrvl_sdio_card *card;
 615         u8 ireg = 0;
 616
 617         card = sdio_get_drvdata(func);
 618         if (card && card->priv) {
 619                 priv = card->priv;
 620                 hcidev = priv->btmrvl_dev.hcidev;
 621
 622                 if (btmrvl_sdio_get_int_status(priv, &ireg))
 623                         BT_ERR("reading HOST_INT_STATUS_REG failed");
 624                 else
 625                         BT_DBG("HOST_INT_STATUS_REG %#x", ireg);
 626
 627                 btmrvl_interrupt(priv);
 628         }
 629 }
 630
 631 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
 632 {
 633         struct sdio_func *func;
 634         u8 reg;
 635         int ret = 0;
 636
 637         if (!card || !card->func) {
 638                 BT_ERR("Error: card or function is NULL!");
 639                 ret = -EINVAL;
 640                 goto failed;
 641         }
 642
 643         func = card->func;
 644
 645         sdio_claim_host(func);
 646
 647         ret = sdio_enable_func(func);
 648         if (ret) {
 649                 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
 650                 ret = -EIO;
 651                 goto release_host;
 652         }
 653
 654         ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
 655         if (ret) {
 656                 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
 657                 ret = -EIO;
 658                 goto disable_func;
 659         }
 660
 661         ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
 662         if (ret) {
 663                 BT_ERR("cannot set SDIO block size");
 664                 ret = -EIO;
 665                 goto release_irq;
 666         }
 667
 668         reg = sdio_readb(func, IO_PORT_0_REG, &ret);
 669         if (ret < 0) {
 670                 ret = -EIO;
 671                 goto release_irq;
 672         }
 673
 674         card->ioport = reg;
 675
 676         reg = sdio_readb(func, IO_PORT_1_REG, &ret);
 677         if (ret < 0) {
 678                 ret = -EIO;
 679                 goto release_irq;
 680         }
 681
 682         card->ioport |= (reg << 8);
 683
 684         reg = sdio_readb(func, IO_PORT_2_REG, &ret);
 685         if (ret < 0) {
 686                 ret = -EIO;
 687                 goto release_irq;
 688         }
 689
 690         card->ioport |= (reg << 16);
 691
 692         BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
 693
 694         sdio_set_drvdata(func, card);
 695
 696         sdio_release_host(func);
 697
 698         return 0;
 699
 700 release_irq:
 701         sdio_release_irq(func);
 702
 703 disable_func:
 704         sdio_disable_func(func);
 705
 706 release_host:
 707         sdio_release_host(func);
 708
 709 failed:
 710         return ret;
 711 }
 712
 713 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
 714 {
 715         if (card && card->func) {
 716                 sdio_claim_host(card->func);
 717                 sdio_release_irq(card->func);
 718                 sdio_disable_func(card->func);
 719                 sdio_release_host(card->func);
 720                 sdio_set_drvdata(card->func, NULL);
 721         }
 722
 723         return 0;
 724 }
 725
 726 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
 727 {
 728         int ret;
 729
 730         if (!card || !card->func)
 731                 return -EINVAL;
 732
 733         sdio_claim_host(card->func);
 734
 735         ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
 736
 737         btmrvl_sdio_get_rx_unit(card);
 738
 739         sdio_release_host(card->func);
 740
 741         return ret;
 742 }
 743
 744 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
 745 {
 746         int ret;
 747
 748         if (!card || !card->func)
 749                 return -EINVAL;
 750
 751         sdio_claim_host(card->func);
 752
 753         ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
 754
 755         sdio_release_host(card->func);
 756
 757         return ret;
 758 }
 759
 760 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
 761                                 u8 *payload, u16 nb)
 762 {
 763         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 764         int ret = 0;
 765         int buf_block_len;
 766         int blksz;
 767         int i = 0;
 768         u8 *buf = NULL;
 769         void *tmpbuf = NULL;
 770         int tmpbufsz;
 771
 772         if (!card || !card->func) {
 773                 BT_ERR("card or function is NULL!");
 774                 return -EINVAL;
 775         }
 776
 777         buf = payload;
 778         if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
 779                 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
 780                 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
 781                 if (!tmpbuf)
 782                         return -ENOMEM;
 783                 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
 784                 memcpy(buf, payload, nb);
 785         }
 786
 787         blksz = SDIO_BLOCK_SIZE;
 788         buf_block_len = (nb + blksz - 1) / blksz;
 789
 790         sdio_claim_host(card->func);
 791
 792         do {
 793                 /* Transfer data to card */
 794                 ret = sdio_writesb(card->func, card->ioport, buf,
 795                                    buf_block_len * blksz);
 796                 if (ret < 0) {
 797                         i++;
 798                         BT_ERR("i=%d writesb failed: %d", i, ret);
 799                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
 800                                                 payload, nb);
 801                         ret = -EIO;
 802                         if (i > MAX_WRITE_IOMEM_RETRY)
 803                                 goto exit;
 804                 }
 805         } while (ret);
 806
 807         priv->btmrvl_dev.tx_dnld_rdy = false;
 808
 809 exit:
 810         sdio_release_host(card->func);
 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
 932         btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 933
 934         return 0;
 935
 936 disable_host_int:
 937         btmrvl_sdio_disable_host_int(card);
 938 unreg_dev:
 939         btmrvl_sdio_unregister_dev(card);
 940 free_card:
 941         kfree(card);
 942 done:
 943         return ret;
 944 }
 945
 946 static void btmrvl_sdio_remove(struct sdio_func *func)
 947 {
 948         struct btmrvl_sdio_card *card;
 949
 950         if (func) {
 951                 card = sdio_get_drvdata(func);
 952                 if (card) {
 953                         /* Send SHUTDOWN command & disable interrupt
 954                          * if user removes the module.
 955                          */
 956                         if (user_rmmod) {
 957                                 btmrvl_send_module_cfg_cmd(card->priv,
 958                                                         MODULE_SHUTDOWN_REQ);
 959                                 btmrvl_sdio_disable_host_int(card);
 960                         }
 961                         BT_DBG("unregester dev");
 962                         btmrvl_sdio_unregister_dev(card);
 963                         btmrvl_remove_card(card->priv);
 964                         kfree(card);
 965                 }
 966         }
 967 }
 968
 969 static struct sdio_driver bt_mrvl_sdio = {
 970         .name           = "btmrvl_sdio",
 971         .id_table       = btmrvl_sdio_ids,
 972         .probe          = btmrvl_sdio_probe,
 973         .remove         = btmrvl_sdio_remove,
 974 };
 975
 976 static int btmrvl_sdio_init_module(void)
 977 {
 978         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
 979                 BT_ERR("SDIO Driver Registration Failed");
 980                 return -ENODEV;
 981         }
 982
 983         /* Clear the flag in case user removes the card. */
 984         user_rmmod = 0;
 985
 986         return 0;
 987 }
 988
 989 static void btmrvl_sdio_exit_module(void)
 990 {
 991         /* Set the flag as user is removing this module. */
 992         user_rmmod = 1;
 993
 994         sdio_unregister_driver(&bt_mrvl_sdio);
 995 }
 996
 997 module_init(btmrvl_sdio_init_module);
 998 module_exit(btmrvl_sdio_exit_module);
 999
1000 MODULE_AUTHOR("Marvell International Ltd.");
1001 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1002 MODULE_VERSION(VERSION);
1003 MODULE_LICENSE("GPL v2");