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 ((u32) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 485                 skb_put(skb, (u32) skb->data & (BTSDIO_DMA_ALIGN - 1));
 486                 skb_pull(skb, (u32) skb->data & (BTSDIO_DMA_ALIGN - 1));
 487         }
 488
 489         payload = skb->tail;
 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("Unknow 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_get_int_status(struct btmrvl_private *priv, u8 * ireg)
 556 {
 557         int ret;
 558         u8 sdio_ireg = 0;
 559         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 560
 561         *ireg = 0;
 562
 563         sdio_ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret);
 564         if (ret) {
 565                 BT_ERR("sdio_readb: read int status register failed");
 566                 ret = -EIO;
 567                 goto done;
 568         }
 569
 570         if (sdio_ireg != 0) {
 571                 /*
 572                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 573                  * Clear the interrupt status register and re-enable the
 574                  * interrupt.
 575                  */
 576                 BT_DBG("sdio_ireg = 0x%x", sdio_ireg);
 577
 578                 sdio_writeb(card->func, ~(sdio_ireg) & (DN_LD_HOST_INT_STATUS |
 579                                                         UP_LD_HOST_INT_STATUS),
 580                             HOST_INTSTATUS_REG, &ret);
 581                 if (ret) {
 582                         BT_ERR("sdio_writeb: clear int status register "
 583                                 "failed");
 584                         ret = -EIO;
 585                         goto done;
 586                 }
 587         }
 588
 589         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
 590                 if (priv->btmrvl_dev.tx_dnld_rdy)
 591                         BT_DBG("tx_done already received: "
 592                                 " int_status=0x%x", sdio_ireg);
 593                 else
 594                         priv->btmrvl_dev.tx_dnld_rdy = true;
 595         }
 596
 597         if (sdio_ireg & UP_LD_HOST_INT_STATUS)
 598                 btmrvl_sdio_card_to_host(priv);
 599
 600         *ireg = sdio_ireg;
 601
 602         ret = 0;
 603
 604 done:
 605         return ret;
 606 }
 607
 608 static void btmrvl_sdio_interrupt(struct sdio_func *func)
 609 {
 610         struct btmrvl_private *priv;
 611         struct hci_dev *hcidev;
 612         struct btmrvl_sdio_card *card;
 613         u8 ireg = 0;
 614
 615         card = sdio_get_drvdata(func);
 616         if (card && card->priv) {
 617                 priv = card->priv;
 618                 hcidev = priv->btmrvl_dev.hcidev;
 619
 620                 if (btmrvl_sdio_get_int_status(priv, &ireg))
 621                         BT_ERR("reading HOST_INT_STATUS_REG failed");
 622                 else
 623                         BT_DBG("HOST_INT_STATUS_REG %#x", ireg);
 624
 625                 btmrvl_interrupt(priv);
 626         }
 627 }
 628
 629 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
 630 {
 631         struct sdio_func *func;
 632         u8 reg;
 633         int ret = 0;
 634
 635         if (!card || !card->func) {
 636                 BT_ERR("Error: card or function is NULL!");
 637                 ret = -EINVAL;
 638                 goto failed;
 639         }
 640
 641         func = card->func;
 642
 643         sdio_claim_host(func);
 644
 645         ret = sdio_enable_func(func);
 646         if (ret) {
 647                 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
 648                 ret = -EIO;
 649                 goto release_host;
 650         }
 651
 652         ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
 653         if (ret) {
 654                 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
 655                 ret = -EIO;
 656                 goto disable_func;
 657         }
 658
 659         ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
 660         if (ret) {
 661                 BT_ERR("cannot set SDIO block size");
 662                 ret = -EIO;
 663                 goto release_irq;
 664         }
 665
 666         reg = sdio_readb(func, IO_PORT_0_REG, &ret);
 667         if (ret < 0) {
 668                 ret = -EIO;
 669                 goto release_irq;
 670         }
 671
 672         card->ioport = reg;
 673
 674         reg = sdio_readb(func, IO_PORT_1_REG, &ret);
 675         if (ret < 0) {
 676                 ret = -EIO;
 677                 goto release_irq;
 678         }
 679
 680         card->ioport |= (reg << 8);
 681
 682         reg = sdio_readb(func, IO_PORT_2_REG, &ret);
 683         if (ret < 0) {
 684                 ret = -EIO;
 685                 goto release_irq;
 686         }
 687
 688         card->ioport |= (reg << 16);
 689
 690         BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
 691
 692         sdio_set_drvdata(func, card);
 693
 694         sdio_release_host(func);
 695
 696         return 0;
 697
 698 release_irq:
 699         sdio_release_irq(func);
 700
 701 disable_func:
 702         sdio_disable_func(func);
 703
 704 release_host:
 705         sdio_release_host(func);
 706
 707 failed:
 708         return ret;
 709 }
 710
 711 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
 712 {
 713         if (card && card->func) {
 714                 sdio_claim_host(card->func);
 715                 sdio_release_irq(card->func);
 716                 sdio_disable_func(card->func);
 717                 sdio_release_host(card->func);
 718                 sdio_set_drvdata(card->func, NULL);
 719         }
 720
 721         return 0;
 722 }
 723
 724 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
 725 {
 726         int ret;
 727
 728         if (!card || !card->func)
 729                 return -EINVAL;
 730
 731         sdio_claim_host(card->func);
 732
 733         ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
 734
 735         btmrvl_sdio_get_rx_unit(card);
 736
 737         sdio_release_host(card->func);
 738
 739         return ret;
 740 }
 741
 742 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
 743 {
 744         int ret;
 745
 746         if (!card || !card->func)
 747                 return -EINVAL;
 748
 749         sdio_claim_host(card->func);
 750
 751         ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
 752
 753         sdio_release_host(card->func);
 754
 755         return ret;
 756 }
 757
 758 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
 759                                 u8 *payload, u16 nb)
 760 {
 761         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 762         int ret = 0;
 763         int buf_block_len;
 764         int blksz;
 765         int i = 0;
 766         u8 *buf = NULL;
 767         void *tmpbuf = NULL;
 768         int tmpbufsz;
 769
 770         if (!card || !card->func) {
 771                 BT_ERR("card or function is NULL!");
 772                 return -EINVAL;
 773         }
 774
 775         buf = payload;
 776         if ((u32) payload & (BTSDIO_DMA_ALIGN - 1)) {
 777                 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
 778                 tmpbuf = kmalloc(tmpbufsz, GFP_KERNEL);
 779                 memset(tmpbuf, 0, tmpbufsz);
 780                 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
 781                 memcpy(buf, payload, nb);
 782         }
 783
 784         blksz = SDIO_BLOCK_SIZE;
 785         buf_block_len = (nb + blksz - 1) / blksz;
 786
 787         sdio_claim_host(card->func);
 788
 789         do {
 790                 /* Transfer data to card */
 791                 ret = sdio_writesb(card->func, card->ioport, buf,
 792                                    buf_block_len * blksz);
 793                 if (ret < 0) {
 794                         i++;
 795                         BT_ERR("i=%d writesb failed: %d", i, ret);
 796                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
 797                                                 payload, nb);
 798                         ret = -EIO;
 799                         if (i > MAX_WRITE_IOMEM_RETRY)
 800                                 goto exit;
 801                 }
 802         } while (ret);
 803
 804         priv->btmrvl_dev.tx_dnld_rdy = false;
 805
 806 exit:
 807         sdio_release_host(card->func);
 808
 809         return ret;
 810 }
 811
 812 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
 813 {
 814         int ret = 0;
 815
 816         if (!card || !card->func) {
 817                 BT_ERR("card or function is NULL!");
 818                 return -EINVAL;
 819         }
 820         sdio_claim_host(card->func);
 821
 822         if (!btmrvl_sdio_verify_fw_download(card, 1)) {
 823                 BT_DBG("Firmware already downloaded!");
 824                 goto done;
 825         }
 826
 827         ret = btmrvl_sdio_download_helper(card);
 828         if (ret) {
 829                 BT_ERR("Failed to download helper!");
 830                 ret = -EIO;
 831                 goto done;
 832         }
 833
 834         if (btmrvl_sdio_download_fw_w_helper(card)) {
 835                 BT_ERR("Failed to download firmware!");
 836                 ret = -EIO;
 837                 goto done;
 838         }
 839
 840         if (btmrvl_sdio_verify_fw_download(card, MAX_POLL_TRIES)) {
 841                 BT_ERR("FW failed to be active in time!");
 842                 ret = -ETIMEDOUT;
 843                 goto done;
 844         }
 845
 846 done:
 847         sdio_release_host(card->func);
 848
 849         return ret;
 850 }
 851
 852 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
 853 {
 854         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 855         int ret = 0;
 856
 857         if (!card || !card->func) {
 858                 BT_ERR("card or function is NULL!");
 859                 return -EINVAL;
 860         }
 861
 862         sdio_claim_host(card->func);
 863
 864         sdio_writeb(card->func, HOST_POWER_UP, CONFIG_REG, &ret);
 865
 866         sdio_release_host(card->func);
 867
 868         BT_DBG("wake up firmware");
 869
 870         return ret;
 871 }
 872
 873 static int btmrvl_sdio_probe(struct sdio_func *func,
 874                                         const struct sdio_device_id *id)
 875 {
 876         int ret = 0;
 877         struct btmrvl_private *priv = NULL;
 878         struct btmrvl_sdio_card *card = NULL;
 879
 880         BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
 881                         id->vendor, id->device, id->class, func->num);
 882
 883         card = kzalloc(sizeof(*card), GFP_KERNEL);
 884         if (!card) {
 885                 ret = -ENOMEM;
 886                 goto done;
 887         }
 888
 889         card->func = func;
 890
 891         if (id->driver_data) {
 892                 struct btmrvl_sdio_device *data = (void *) id->driver_data;
 893                 card->helper   = data->helper;
 894                 card->firmware = data->firmware;
 895         }
 896
 897         if (btmrvl_sdio_register_dev(card) < 0) {
 898                 BT_ERR("Failed to register BT device!");
 899                 ret = -ENODEV;
 900                 goto free_card;
 901         }
 902
 903         /* Disable the interrupts on the card */
 904         btmrvl_sdio_disable_host_int(card);
 905
 906         if (btmrvl_sdio_download_fw(card)) {
 907                 BT_ERR("Downloading firmware failed!");
 908                 ret = -ENODEV;
 909                 goto unreg_dev;
 910         }
 911
 912         msleep(100);
 913
 914         btmrvl_sdio_enable_host_int(card);
 915
 916         priv = btmrvl_add_card(card);
 917         if (!priv) {
 918                 BT_ERR("Initializing card failed!");
 919                 ret = -ENODEV;
 920                 goto disable_host_int;
 921         }
 922
 923         card->priv = priv;
 924
 925         /* Initialize the interface specific function pointers */
 926         priv->hw_host_to_card = btmrvl_sdio_host_to_card;
 927         priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
 928
 929         btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 930
 931         return 0;
 932
 933 disable_host_int:
 934         btmrvl_sdio_disable_host_int(card);
 935 unreg_dev:
 936         btmrvl_sdio_unregister_dev(card);
 937 free_card:
 938         kfree(card);
 939 done:
 940         return ret;
 941 }
 942
 943 static void btmrvl_sdio_remove(struct sdio_func *func)
 944 {
 945         struct btmrvl_sdio_card *card;
 946
 947         if (func) {
 948                 card = sdio_get_drvdata(func);
 949                 if (card) {
 950                         /* Send SHUTDOWN command & disable interrupt
 951                          * if user removes the module.
 952                          */
 953                         if (user_rmmod) {
 954                                 btmrvl_send_module_cfg_cmd(card->priv,
 955                                                         MODULE_SHUTDOWN_REQ);
 956                                 btmrvl_sdio_disable_host_int(card);
 957                         }
 958                         BT_DBG("unregester dev");
 959                         btmrvl_sdio_unregister_dev(card);
 960                         btmrvl_remove_card(card->priv);
 961                         kfree(card);
 962                 }
 963         }
 964 }
 965
 966 static struct sdio_driver bt_mrvl_sdio = {
 967         .name           = "btmrvl_sdio",
 968         .id_table       = btmrvl_sdio_ids,
 969         .probe          = btmrvl_sdio_probe,
 970         .remove         = btmrvl_sdio_remove,
 971 };
 972
 973 static int btmrvl_sdio_init_module(void)
 974 {
 975         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
 976                 BT_ERR("SDIO Driver Registration Failed");
 977                 return -ENODEV;
 978         }
 979
 980         /* Clear the flag in case user removes the card. */
 981         user_rmmod = 0;
 982
 983         return 0;
 984 }
 985
 986 static void btmrvl_sdio_exit_module(void)
 987 {
 988         /* Set the flag as user is removing this module. */
 989         user_rmmod = 1;
 990
 991         sdio_unregister_driver(&bt_mrvl_sdio);
 992 }
 993
 994 module_init(btmrvl_sdio_init_module);
 995 module_exit(btmrvl_sdio_exit_module);
 996
 997 MODULE_AUTHOR("Marvell International Ltd.");
 998 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
 999 MODULE_VERSION(VERSION);
1000 MODULE_LICENSE("GPL v2");