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