drivers/bluetooth/btmrvl_sdio.c

   1 /**
   2  * Marvell BT-over-SDIO driver: SDIO interface related functions.
   3  *
   4  * Copyright (C) 2009, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  *
  15  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  18  * this warranty disclaimer.
  19  **/
  20
  21 #include <linux/firmware.h>
  22 #include <linux/slab.h>
  23
  24 #include <linux/mmc/sdio_ids.h>
  25 #include <linux/mmc/sdio_func.h>
  26
  27 #include <net/bluetooth/bluetooth.h>
  28 #include <net/bluetooth/hci_core.h>
  29
  30 #include "btmrvl_drv.h"
  31 #include "btmrvl_sdio.h"
  32
  33 #define VERSION "1.0"
  34
  35 /* The btmrvl_sdio_remove() callback function is called
  36  * when user removes this module from kernel space or ejects
  37  * the card from the slot. The driver handles these 2 cases
  38  * differently.
  39  * If the user is removing the module, a MODULE_SHUTDOWN_REQ
  40  * command is sent to firmware and interrupt will be disabled.
  41  * If the card is removed, there is no need to send command
  42  * or disable interrupt.
  43  *
  44  * The variable 'user_rmmod' is used to distinguish these two
  45  * scenarios. This flag is initialized as FALSE in case the card
  46  * is removed, and will be set to TRUE for module removal when
  47  * module_exit function is called.
  48  */
  49 static u8 user_rmmod;
  50 static u8 sdio_ireg;
  51
  52 static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = {
  53         .cfg = 0x03,
  54         .host_int_mask = 0x04,
  55         .host_intstatus = 0x05,
  56         .card_status = 0x20,
  57         .sq_read_base_addr_a0 = 0x10,
  58         .sq_read_base_addr_a1 = 0x11,
  59         .card_fw_status0 = 0x40,
  60         .card_fw_status1 = 0x41,
  61         .card_rx_len = 0x42,
  62         .card_rx_unit = 0x43,
  63         .io_port_0 = 0x00,
  64         .io_port_1 = 0x01,
  65         .io_port_2 = 0x02,
  66 };
  67 static const struct btmrvl_sdio_card_reg btmrvl_reg_8787 = {
  68         .cfg = 0x00,
  69         .host_int_mask = 0x02,
  70         .host_intstatus = 0x03,
  71         .card_status = 0x30,
  72         .sq_read_base_addr_a0 = 0x40,
  73         .sq_read_base_addr_a1 = 0x41,
  74         .card_revision = 0x5c,
  75         .card_fw_status0 = 0x60,
  76         .card_fw_status1 = 0x61,
  77         .card_rx_len = 0x62,
  78         .card_rx_unit = 0x63,
  79         .io_port_0 = 0x78,
  80         .io_port_1 = 0x79,
  81         .io_port_2 = 0x7a,
  82 };
  83
  84 static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
  85         .helper         = "sd8688_helper.bin",
  86         .firmware       = "sd8688.bin",
  87         .reg            = &btmrvl_reg_8688,
  88         .sd_blksz_fw_dl = 64,
  89 };
  90
  91 static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
  92         .helper         = NULL,
  93         .firmware       = "mrvl/sd8787_uapsta.bin",
  94         .reg            = &btmrvl_reg_8787,
  95         .sd_blksz_fw_dl = 256,
  96 };
  97
  98 static const struct sdio_device_id btmrvl_sdio_ids[] = {
  99         /* Marvell SD8688 Bluetooth device */
 100         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
 101                         .driver_data = (unsigned long) &btmrvl_sdio_sd8688 },
 102         /* Marvell SD8787 Bluetooth device */
 103         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
 104                         .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
 105
 106         { }     /* Terminating entry */
 107 };
 108
 109 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
 110
 111 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
 112 {
 113         u8 reg;
 114         int ret;
 115
 116         reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
 117         if (!ret)
 118                 card->rx_unit = reg;
 119
 120         return ret;
 121 }
 122
 123 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
 124 {
 125         u8 fws0, fws1;
 126         int ret;
 127
 128         *dat = 0;
 129
 130         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 131         if (ret)
 132                 return -EIO;
 133
 134         fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
 135         if (ret)
 136                 return -EIO;
 137
 138         *dat = (((u16) fws1) << 8) | fws0;
 139
 140         return 0;
 141 }
 142
 143 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
 144 {
 145         u8 reg;
 146         int ret;
 147
 148         reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
 149         if (!ret)
 150                 *dat = (u16) reg << card->rx_unit;
 151
 152         return ret;
 153 }
 154
 155 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
 156                                                                 u8 mask)
 157 {
 158         int ret;
 159
 160         sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
 161         if (ret) {
 162                 BT_ERR("Unable to enable the host interrupt!");
 163                 ret = -EIO;
 164         }
 165
 166         return ret;
 167 }
 168
 169 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
 170                                                                 u8 mask)
 171 {
 172         u8 host_int_mask;
 173         int ret;
 174
 175         host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
 176         if (ret)
 177                 return -EIO;
 178
 179         host_int_mask &= ~mask;
 180
 181         sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
 182         if (ret < 0) {
 183                 BT_ERR("Unable to disable the host interrupt!");
 184                 return -EIO;
 185         }
 186
 187         return 0;
 188 }
 189
 190 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
 191 {
 192         unsigned int tries;
 193         u8 status;
 194         int ret;
 195
 196         for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
 197                 status = sdio_readb(card->func, card->reg->card_status, &ret);
 198                 if (ret)
 199                         goto failed;
 200                 if ((status & bits) == bits)
 201                         return ret;
 202
 203                 udelay(1);
 204         }
 205
 206         ret = -ETIMEDOUT;
 207
 208 failed:
 209         BT_ERR("FAILED! ret=%d", ret);
 210
 211         return ret;
 212 }
 213
 214 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
 215                                                                 int pollnum)
 216 {
 217         int ret = -ETIMEDOUT;
 218         u16 firmwarestat;
 219         unsigned int tries;
 220
 221          /* Wait for firmware to become ready */
 222         for (tries = 0; tries < pollnum; tries++) {
 223                 if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
 224                         continue;
 225
 226                 if (firmwarestat == FIRMWARE_READY) {
 227                         ret = 0;
 228                         break;
 229                 } else {
 230                         msleep(10);
 231                 }
 232         }
 233
 234         return ret;
 235 }
 236
 237 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 238 {
 239         const struct firmware *fw_helper = NULL;
 240         const u8 *helper = NULL;
 241         int ret;
 242         void *tmphlprbuf = NULL;
 243         int tmphlprbufsz, hlprblknow, helperlen;
 244         u8 *helperbuf;
 245         u32 tx_len;
 246
 247         ret = request_firmware(&fw_helper, card->helper,
 248                                                 &card->func->dev);
 249         if ((ret < 0) || !fw_helper) {
 250                 BT_ERR("request_firmware(helper) failed, error code = %d",
 251                                                                         ret);
 252                 ret = -ENOENT;
 253                 goto done;
 254         }
 255
 256         helper = fw_helper->data;
 257         helperlen = fw_helper->size;
 258
 259         BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
 260                                                 helperlen, SDIO_BLOCK_SIZE);
 261
 262         tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 263
 264         tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
 265         if (!tmphlprbuf) {
 266                 BT_ERR("Unable to allocate buffer for helper."
 267                         " Terminating download");
 268                 ret = -ENOMEM;
 269                 goto done;
 270         }
 271
 272         helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
 273
 274         /* Perform helper data transfer */
 275         tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
 276                         - SDIO_HEADER_LEN;
 277         hlprblknow = 0;
 278
 279         do {
 280                 ret = btmrvl_sdio_poll_card_status(card,
 281                                             CARD_IO_READY | DN_LD_CARD_RDY);
 282                 if (ret < 0) {
 283                         BT_ERR("Helper download poll status timeout @ %d",
 284                                 hlprblknow);
 285                         goto done;
 286                 }
 287
 288                 /* Check if there is more data? */
 289                 if (hlprblknow >= helperlen)
 290                         break;
 291
 292                 if (helperlen - hlprblknow < tx_len)
 293                         tx_len = helperlen - hlprblknow;
 294
 295                 /* Little-endian */
 296                 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
 297                 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
 298                 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
 299                 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
 300
 301                 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
 302                                 tx_len);
 303
 304                 /* Now send the data */
 305                 ret = sdio_writesb(card->func, card->ioport, helperbuf,
 306                                 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
 307                 if (ret < 0) {
 308                         BT_ERR("IO error during helper download @ %d",
 309                                 hlprblknow);
 310                         goto done;
 311                 }
 312
 313                 hlprblknow += tx_len;
 314         } while (true);
 315
 316         BT_DBG("Transferring helper image EOF block");
 317
 318         memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
 319
 320         ret = sdio_writesb(card->func, card->ioport, helperbuf,
 321                                                         SDIO_BLOCK_SIZE);
 322         if (ret < 0) {
 323                 BT_ERR("IO error in writing helper image EOF block");
 324                 goto done;
 325         }
 326
 327         ret = 0;
 328
 329 done:
 330         kfree(tmphlprbuf);
 331         if (fw_helper)
 332                 release_firmware(fw_helper);
 333
 334         return ret;
 335 }
 336
 337 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
 338 {
 339         const struct firmware *fw_firmware = NULL;
 340         const u8 *firmware = NULL;
 341         int firmwarelen, tmpfwbufsz, ret;
 342         unsigned int tries, offset;
 343         u8 base0, base1;
 344         void *tmpfwbuf = NULL;
 345         u8 *fwbuf;
 346         u16 len, blksz_dl = card->sd_blksz_fw_dl;
 347         int txlen = 0, tx_blocks = 0, count = 0;
 348
 349         ret = request_firmware(&fw_firmware, card->firmware,
 350                                                         &card->func->dev);
 351         if ((ret < 0) || !fw_firmware) {
 352                 BT_ERR("request_firmware(firmware) failed, error code = %d",
 353                                                                         ret);
 354                 ret = -ENOENT;
 355                 goto done;
 356         }
 357
 358         firmware = fw_firmware->data;
 359         firmwarelen = fw_firmware->size;
 360
 361         BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
 362
 363         tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 364         tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
 365         if (!tmpfwbuf) {
 366                 BT_ERR("Unable to allocate buffer for firmware."
 367                        " Terminating download");
 368                 ret = -ENOMEM;
 369                 goto done;
 370         }
 371
 372         /* Ensure aligned firmware buffer */
 373         fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
 374
 375         /* Perform firmware data transfer */
 376         offset = 0;
 377         do {
 378                 ret = btmrvl_sdio_poll_card_status(card,
 379                                         CARD_IO_READY | DN_LD_CARD_RDY);
 380                 if (ret < 0) {
 381                         BT_ERR("FW download with helper poll status"
 382                                                 " timeout @ %d", offset);
 383                         goto done;
 384                 }
 385
 386                 /* Check if there is more data ? */
 387                 if (offset >= firmwarelen)
 388                         break;
 389
 390                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 391                         base0 = sdio_readb(card->func,
 392                                         card->reg->sq_read_base_addr_a0, &ret);
 393                         if (ret) {
 394                                 BT_ERR("BASE0 register read failed:"
 395                                         " base0 = 0x%04X(%d)."
 396                                         " Terminating download",
 397                                         base0, base0);
 398                                 ret = -EIO;
 399                                 goto done;
 400                         }
 401                         base1 = sdio_readb(card->func,
 402                                         card->reg->sq_read_base_addr_a1, &ret);
 403                         if (ret) {
 404                                 BT_ERR("BASE1 register read failed:"
 405                                         " base1 = 0x%04X(%d)."
 406                                         " Terminating download",
 407                                         base1, base1);
 408                                 ret = -EIO;
 409                                 goto done;
 410                         }
 411
 412                         len = (((u16) base1) << 8) | base0;
 413                         if (len)
 414                                 break;
 415
 416                         udelay(10);
 417                 }
 418
 419                 if (!len)
 420                         break;
 421                 else if (len > BTM_UPLD_SIZE) {
 422                         BT_ERR("FW download failure @%d, invalid length %d",
 423                                                                 offset, len);
 424                         ret = -EINVAL;
 425                         goto done;
 426                 }
 427
 428                 txlen = len;
 429
 430                 if (len & BIT(0)) {
 431                         count++;
 432                         if (count > MAX_WRITE_IOMEM_RETRY) {
 433                                 BT_ERR("FW download failure @%d, "
 434                                         "over max retry count", offset);
 435                                 ret = -EIO;
 436                                 goto done;
 437                         }
 438                         BT_ERR("FW CRC error indicated by the helper: "
 439                                 "len = 0x%04X, txlen = %d", len, txlen);
 440                         len &= ~BIT(0);
 441                         /* Set txlen to 0 so as to resend from same offset */
 442                         txlen = 0;
 443                 } else {
 444                         count = 0;
 445
 446                         /* Last block ? */
 447                         if (firmwarelen - offset < txlen)
 448                                 txlen = firmwarelen - offset;
 449
 450                         tx_blocks = (txlen + blksz_dl - 1) / blksz_dl;
 451
 452                         memcpy(fwbuf, &firmware[offset], txlen);
 453                 }
 454
 455                 ret = sdio_writesb(card->func, card->ioport, fwbuf,
 456                                                 tx_blocks * blksz_dl);
 457
 458                 if (ret < 0) {
 459                         BT_ERR("FW download, writesb(%d) failed @%d",
 460                                                         count, offset);
 461                         sdio_writeb(card->func, HOST_CMD53_FIN,
 462                                                 card->reg->cfg, &ret);
 463                         if (ret)
 464                                 BT_ERR("writeb failed (CFG)");
 465                 }
 466
 467                 offset += txlen;
 468         } while (true);
 469
 470         BT_DBG("FW download over, size %d bytes", offset);
 471
 472         ret = 0;
 473
 474 done:
 475         kfree(tmpfwbuf);
 476
 477         if (fw_firmware)
 478                 release_firmware(fw_firmware);
 479
 480         return ret;
 481 }
 482
 483 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 484 {
 485         u16 buf_len = 0;
 486         int ret, buf_block_len, blksz;
 487         struct sk_buff *skb = NULL;
 488         u32 type;
 489         u8 *payload = NULL;
 490         struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
 491         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 492
 493         if (!card || !card->func) {
 494                 BT_ERR("card or function is NULL!");
 495                 ret = -EINVAL;
 496                 goto exit;
 497         }
 498
 499         /* Read the length of data to be transferred */
 500         ret = btmrvl_sdio_read_rx_len(card, &buf_len);
 501         if (ret < 0) {
 502                 BT_ERR("read rx_len failed");
 503                 ret = -EIO;
 504                 goto exit;
 505         }
 506
 507         blksz = SDIO_BLOCK_SIZE;
 508         buf_block_len = (buf_len + blksz - 1) / blksz;
 509
 510         if (buf_len <= SDIO_HEADER_LEN
 511                         || (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
 512                 BT_ERR("invalid packet length: %d", buf_len);
 513                 ret = -EINVAL;
 514                 goto exit;
 515         }
 516
 517         /* Allocate buffer */
 518         skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
 519                                                                 GFP_ATOMIC);
 520         if (skb == NULL) {
 521                 BT_ERR("No free skb");
 522                 goto exit;
 523         }
 524
 525         if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 526                 skb_put(skb, (unsigned long) skb->data &
 527                                         (BTSDIO_DMA_ALIGN - 1));
 528                 skb_pull(skb, (unsigned long) skb->data &
 529                                         (BTSDIO_DMA_ALIGN - 1));
 530         }
 531
 532         payload = skb->data;
 533
 534         ret = sdio_readsb(card->func, payload, card->ioport,
 535                           buf_block_len * blksz);
 536         if (ret < 0) {
 537                 BT_ERR("readsb failed: %d", ret);
 538                 ret = -EIO;
 539                 goto exit;
 540         }
 541
 542         /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
 543          * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
 544          */
 545
 546         buf_len = payload[0];
 547         buf_len |= (u16) payload[1] << 8;
 548         type = payload[3];
 549
 550         switch (type) {
 551         case HCI_ACLDATA_PKT:
 552         case HCI_SCODATA_PKT:
 553         case HCI_EVENT_PKT:
 554                 bt_cb(skb)->pkt_type = type;
 555                 skb->dev = (void *)hdev;
 556                 skb_put(skb, buf_len);
 557                 skb_pull(skb, SDIO_HEADER_LEN);
 558
 559                 if (type == HCI_EVENT_PKT)
 560                         btmrvl_check_evtpkt(priv, skb);
 561
 562                 hci_recv_frame(skb);
 563                 hdev->stat.byte_rx += buf_len;
 564                 break;
 565
 566         case MRVL_VENDOR_PKT:
 567                 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
 568                 skb->dev = (void *)hdev;
 569                 skb_put(skb, buf_len);
 570                 skb_pull(skb, SDIO_HEADER_LEN);
 571
 572                 if (btmrvl_process_event(priv, skb))
 573                         hci_recv_frame(skb);
 574
 575                 hdev->stat.byte_rx += buf_len;
 576                 break;
 577
 578         default:
 579                 BT_ERR("Unknown packet type:%d", type);
 580                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
 581                                                 blksz * buf_block_len);
 582
 583                 kfree_skb(skb);
 584                 skb = NULL;
 585                 break;
 586         }
 587
 588 exit:
 589         if (ret) {
 590                 hdev->stat.err_rx++;
 591                 if (skb)
 592                         kfree_skb(skb);
 593         }
 594
 595         return ret;
 596 }
 597
 598 static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
 599 {
 600         ulong flags;
 601         u8 ireg;
 602         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 603
 604         spin_lock_irqsave(&priv->driver_lock, flags);
 605         ireg = sdio_ireg;
 606         sdio_ireg = 0;
 607         spin_unlock_irqrestore(&priv->driver_lock, flags);
 608
 609         sdio_claim_host(card->func);
 610         if (ireg & DN_LD_HOST_INT_STATUS) {
 611                 if (priv->btmrvl_dev.tx_dnld_rdy)
 612                         BT_DBG("tx_done already received: "
 613                                 " int_status=0x%x", ireg);
 614                 else
 615                         priv->btmrvl_dev.tx_dnld_rdy = true;
 616         }
 617
 618         if (ireg & UP_LD_HOST_INT_STATUS)
 619                 btmrvl_sdio_card_to_host(priv);
 620
 621         sdio_release_host(card->func);
 622
 623         return 0;
 624 }
 625
 626 static void btmrvl_sdio_interrupt(struct sdio_func *func)
 627 {
 628         struct btmrvl_private *priv;
 629         struct btmrvl_sdio_card *card;
 630         ulong flags;
 631         u8 ireg = 0;
 632         int ret;
 633
 634         card = sdio_get_drvdata(func);
 635         if (!card || !card->priv) {
 636                 BT_ERR("sbi_interrupt(%p) card or priv is "
 637                                 "NULL, card=%p\n", func, card);
 638                 return;
 639         }
 640
 641         priv = card->priv;
 642
 643         ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
 644         if (ret) {
 645                 BT_ERR("sdio_readb: read int status register failed");
 646                 return;
 647         }
 648
 649         if (ireg != 0) {
 650                 /*
 651                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 652                  * Clear the interrupt status register and re-enable the
 653                  * interrupt.
 654                  */
 655                 BT_DBG("ireg = 0x%x", ireg);
 656
 657                 sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
 658                                         UP_LD_HOST_INT_STATUS),
 659                                 card->reg->host_intstatus, &ret);
 660                 if (ret) {
 661                         BT_ERR("sdio_writeb: clear int status register failed");
 662                         return;
 663                 }
 664         }
 665
 666         spin_lock_irqsave(&priv->driver_lock, flags);
 667         sdio_ireg |= ireg;
 668         spin_unlock_irqrestore(&priv->driver_lock, flags);
 669
 670         btmrvl_interrupt(priv);
 671 }
 672
 673 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
 674 {
 675         struct sdio_func *func;
 676         u8 reg;
 677         int ret = 0;
 678
 679         if (!card || !card->func) {
 680                 BT_ERR("Error: card or function is NULL!");
 681                 ret = -EINVAL;
 682                 goto failed;
 683         }
 684
 685         func = card->func;
 686
 687         sdio_claim_host(func);
 688
 689         ret = sdio_enable_func(func);
 690         if (ret) {
 691                 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
 692                 ret = -EIO;
 693                 goto release_host;
 694         }
 695
 696         ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
 697         if (ret) {
 698                 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
 699                 ret = -EIO;
 700                 goto disable_func;
 701         }
 702
 703         ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
 704         if (ret) {
 705                 BT_ERR("cannot set SDIO block size");
 706                 ret = -EIO;
 707                 goto release_irq;
 708         }
 709
 710         reg = sdio_readb(func, card->reg->io_port_0, &ret);
 711         if (ret < 0) {
 712                 ret = -EIO;
 713                 goto release_irq;
 714         }
 715
 716         card->ioport = reg;
 717
 718         reg = sdio_readb(func, card->reg->io_port_1, &ret);
 719         if (ret < 0) {
 720                 ret = -EIO;
 721                 goto release_irq;
 722         }
 723
 724         card->ioport |= (reg << 8);
 725
 726         reg = sdio_readb(func, card->reg->io_port_2, &ret);
 727         if (ret < 0) {
 728                 ret = -EIO;
 729                 goto release_irq;
 730         }
 731
 732         card->ioport |= (reg << 16);
 733
 734         BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
 735
 736         sdio_set_drvdata(func, card);
 737
 738         sdio_release_host(func);
 739
 740         return 0;
 741
 742 release_irq:
 743         sdio_release_irq(func);
 744
 745 disable_func:
 746         sdio_disable_func(func);
 747
 748 release_host:
 749         sdio_release_host(func);
 750
 751 failed:
 752         return ret;
 753 }
 754
 755 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
 756 {
 757         if (card && card->func) {
 758                 sdio_claim_host(card->func);
 759                 sdio_release_irq(card->func);
 760                 sdio_disable_func(card->func);
 761                 sdio_release_host(card->func);
 762                 sdio_set_drvdata(card->func, NULL);
 763         }
 764
 765         return 0;
 766 }
 767
 768 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
 769 {
 770         int ret;
 771
 772         if (!card || !card->func)
 773                 return -EINVAL;
 774
 775         sdio_claim_host(card->func);
 776
 777         ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
 778
 779         btmrvl_sdio_get_rx_unit(card);
 780
 781         sdio_release_host(card->func);
 782
 783         return ret;
 784 }
 785
 786 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
 787 {
 788         int ret;
 789
 790         if (!card || !card->func)
 791                 return -EINVAL;
 792
 793         sdio_claim_host(card->func);
 794
 795         ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
 796
 797         sdio_release_host(card->func);
 798
 799         return ret;
 800 }
 801
 802 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
 803                                 u8 *payload, u16 nb)
 804 {
 805         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 806         int ret = 0;
 807         int buf_block_len;
 808         int blksz;
 809         int i = 0;
 810         u8 *buf = NULL;
 811         void *tmpbuf = NULL;
 812         int tmpbufsz;
 813
 814         if (!card || !card->func) {
 815                 BT_ERR("card or function is NULL!");
 816                 return -EINVAL;
 817         }
 818
 819         buf = payload;
 820         if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
 821                 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
 822                 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
 823                 if (!tmpbuf)
 824                         return -ENOMEM;
 825                 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
 826                 memcpy(buf, payload, nb);
 827         }
 828
 829         blksz = SDIO_BLOCK_SIZE;
 830         buf_block_len = (nb + blksz - 1) / blksz;
 831
 832         sdio_claim_host(card->func);
 833
 834         do {
 835                 /* Transfer data to card */
 836                 ret = sdio_writesb(card->func, card->ioport, buf,
 837                                    buf_block_len * blksz);
 838                 if (ret < 0) {
 839                         i++;
 840                         BT_ERR("i=%d writesb failed: %d", i, ret);
 841                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
 842                                                 payload, nb);
 843                         ret = -EIO;
 844                         if (i > MAX_WRITE_IOMEM_RETRY)
 845                                 goto exit;
 846                 }
 847         } while (ret);
 848
 849         priv->btmrvl_dev.tx_dnld_rdy = false;
 850
 851 exit:
 852         sdio_release_host(card->func);
 853         kfree(tmpbuf);
 854
 855         return ret;
 856 }
 857
 858 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
 859 {
 860         int ret = 0;
 861         u8 fws0;
 862         int pollnum = MAX_POLL_TRIES;
 863
 864         if (!card || !card->func) {
 865                 BT_ERR("card or function is NULL!");
 866                 return -EINVAL;
 867         }
 868         sdio_claim_host(card->func);
 869
 870         if (!btmrvl_sdio_verify_fw_download(card, 1)) {
 871                 BT_DBG("Firmware already downloaded!");
 872                 goto done;
 873         }
 874
 875         /* Check if other function driver is downloading the firmware */
 876         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 877         if (ret) {
 878                 BT_ERR("Failed to read FW downloading status!");
 879                 ret = -EIO;
 880                 goto done;
 881         }
 882         if (fws0) {
 883                 BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
 884
 885                 /* Give other function more time to download the firmware */
 886                 pollnum *= 10;
 887         } else {
 888                 if (card->helper) {
 889                         ret = btmrvl_sdio_download_helper(card);
 890                         if (ret) {
 891                                 BT_ERR("Failed to download helper!");
 892                                 ret = -EIO;
 893                                 goto done;
 894                         }
 895                 }
 896
 897                 if (btmrvl_sdio_download_fw_w_helper(card)) {
 898                         BT_ERR("Failed to download firmware!");
 899                         ret = -EIO;
 900                         goto done;
 901                 }
 902         }
 903
 904         if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
 905                 BT_ERR("FW failed to be active in time!");
 906                 ret = -ETIMEDOUT;
 907                 goto done;
 908         }
 909
 910 done:
 911         sdio_release_host(card->func);
 912
 913         return ret;
 914 }
 915
 916 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
 917 {
 918         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 919         int ret = 0;
 920
 921         if (!card || !card->func) {
 922                 BT_ERR("card or function is NULL!");
 923                 return -EINVAL;
 924         }
 925
 926         sdio_claim_host(card->func);
 927
 928         sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
 929
 930         sdio_release_host(card->func);
 931
 932         BT_DBG("wake up firmware");
 933
 934         return ret;
 935 }
 936
 937 static int btmrvl_sdio_probe(struct sdio_func *func,
 938                                         const struct sdio_device_id *id)
 939 {
 940         int ret = 0;
 941         struct btmrvl_private *priv = NULL;
 942         struct btmrvl_sdio_card *card = NULL;
 943
 944         BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
 945                         id->vendor, id->device, id->class, func->num);
 946
 947         card = kzalloc(sizeof(*card), GFP_KERNEL);
 948         if (!card) {
 949                 ret = -ENOMEM;
 950                 goto done;
 951         }
 952
 953         card->func = func;
 954
 955         if (id->driver_data) {
 956                 struct btmrvl_sdio_device *data = (void *) id->driver_data;
 957                 card->helper = data->helper;
 958                 card->firmware = data->firmware;
 959                 card->reg = data->reg;
 960                 card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
 961         }
 962
 963         if (btmrvl_sdio_register_dev(card) < 0) {
 964                 BT_ERR("Failed to register BT device!");
 965                 ret = -ENODEV;
 966                 goto free_card;
 967         }
 968
 969         /* Disable the interrupts on the card */
 970         btmrvl_sdio_disable_host_int(card);
 971
 972         if (btmrvl_sdio_download_fw(card)) {
 973                 BT_ERR("Downloading firmware failed!");
 974                 ret = -ENODEV;
 975                 goto unreg_dev;
 976         }
 977
 978         msleep(100);
 979
 980         btmrvl_sdio_enable_host_int(card);
 981
 982         priv = btmrvl_add_card(card);
 983         if (!priv) {
 984                 BT_ERR("Initializing card failed!");
 985                 ret = -ENODEV;
 986                 goto disable_host_int;
 987         }
 988
 989         card->priv = priv;
 990
 991         /* Initialize the interface specific function pointers */
 992         priv->hw_host_to_card = btmrvl_sdio_host_to_card;
 993         priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
 994         priv->hw_process_int_status = btmrvl_sdio_process_int_status;
 995
 996         if (btmrvl_register_hdev(priv)) {
 997                 BT_ERR("Register hdev failed!");
 998                 ret = -ENODEV;
 999                 goto disable_host_int;
1000         }
1001
1002         priv->btmrvl_dev.psmode = 1;
1003         btmrvl_enable_ps(priv);
1004
1005         return 0;
1006
1007 disable_host_int:
1008         btmrvl_sdio_disable_host_int(card);
1009 unreg_dev:
1010         btmrvl_sdio_unregister_dev(card);
1011 free_card:
1012         kfree(card);
1013 done:
1014         return ret;
1015 }
1016
1017 static void btmrvl_sdio_remove(struct sdio_func *func)
1018 {
1019         struct btmrvl_sdio_card *card;
1020
1021         if (func) {
1022                 card = sdio_get_drvdata(func);
1023                 if (card) {
1024                         /* Send SHUTDOWN command & disable interrupt
1025                          * if user removes the module.
1026                          */
1027                         if (user_rmmod) {
1028                                 btmrvl_send_module_cfg_cmd(card->priv,
1029                                                         MODULE_SHUTDOWN_REQ);
1030                                 btmrvl_sdio_disable_host_int(card);
1031                         }
1032                         BT_DBG("unregester dev");
1033                         btmrvl_sdio_unregister_dev(card);
1034                         btmrvl_remove_card(card->priv);
1035                         kfree(card);
1036                 }
1037         }
1038 }
1039
1040 static struct sdio_driver bt_mrvl_sdio = {
1041         .name           = "btmrvl_sdio",
1042         .id_table       = btmrvl_sdio_ids,
1043         .probe          = btmrvl_sdio_probe,
1044         .remove         = btmrvl_sdio_remove,
1045 };
1046
1047 static int __init btmrvl_sdio_init_module(void)
1048 {
1049         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1050                 BT_ERR("SDIO Driver Registration Failed");
1051                 return -ENODEV;
1052         }
1053
1054         /* Clear the flag in case user removes the card. */
1055         user_rmmod = 0;
1056
1057         return 0;
1058 }
1059
1060 static void __exit btmrvl_sdio_exit_module(void)
1061 {
1062         /* Set the flag as user is removing this module. */
1063         user_rmmod = 1;
1064
1065         sdio_unregister_driver(&bt_mrvl_sdio);
1066 }
1067
1068 module_init(btmrvl_sdio_init_module);
1069 module_exit(btmrvl_sdio_exit_module);
1070
1071 MODULE_AUTHOR("Marvell International Ltd.");
1072 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1073 MODULE_VERSION(VERSION);
1074 MODULE_LICENSE("GPL v2");
1075 MODULE_FIRMWARE("sd8688_helper.bin");
1076 MODULE_FIRMWARE("sd8688.bin");
1077 MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");