linux/drivers/bluetooth/btmrvl_sdio.c
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   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#include <linux/module.h>
  27
  28#include <net/bluetooth/bluetooth.h>
  29#include <net/bluetooth/hci_core.h>
  30
  31#include "btmrvl_drv.h"
  32#include "btmrvl_sdio.h"
  33
  34#define VERSION "1.0"
  35
  36/* The btmrvl_sdio_remove() callback function is called
  37 * when user removes this module from kernel space or ejects
  38 * the card from the slot. The driver handles these 2 cases
  39 * differently.
  40 * If the user is removing the module, a MODULE_SHUTDOWN_REQ
  41 * command is sent to firmware and interrupt will be disabled.
  42 * If the card is removed, there is no need to send command
  43 * or disable interrupt.
  44 *
  45 * The variable 'user_rmmod' is used to distinguish these two
  46 * scenarios. This flag is initialized as FALSE in case the card
  47 * is removed, and will be set to TRUE for module removal when
  48 * module_exit function is called.
  49 */
  50static u8 user_rmmod;
  51static u8 sdio_ireg;
  52
  53static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = {
  54        .cfg = 0x03,
  55        .host_int_mask = 0x04,
  56        .host_intstatus = 0x05,
  57        .card_status = 0x20,
  58        .sq_read_base_addr_a0 = 0x10,
  59        .sq_read_base_addr_a1 = 0x11,
  60        .card_fw_status0 = 0x40,
  61        .card_fw_status1 = 0x41,
  62        .card_rx_len = 0x42,
  63        .card_rx_unit = 0x43,
  64        .io_port_0 = 0x00,
  65        .io_port_1 = 0x01,
  66        .io_port_2 = 0x02,
  67};
  68static const struct btmrvl_sdio_card_reg btmrvl_reg_87xx = {
  69        .cfg = 0x00,
  70        .host_int_mask = 0x02,
  71        .host_intstatus = 0x03,
  72        .card_status = 0x30,
  73        .sq_read_base_addr_a0 = 0x40,
  74        .sq_read_base_addr_a1 = 0x41,
  75        .card_revision = 0x5c,
  76        .card_fw_status0 = 0x60,
  77        .card_fw_status1 = 0x61,
  78        .card_rx_len = 0x62,
  79        .card_rx_unit = 0x63,
  80        .io_port_0 = 0x78,
  81        .io_port_1 = 0x79,
  82        .io_port_2 = 0x7a,
  83};
  84
  85static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
  86        .helper         = "sd8688_helper.bin",
  87        .firmware       = "sd8688.bin",
  88        .reg            = &btmrvl_reg_8688,
  89        .sd_blksz_fw_dl = 64,
  90};
  91
  92static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
  93        .helper         = NULL,
  94        .firmware       = "mrvl/sd8787_uapsta.bin",
  95        .reg            = &btmrvl_reg_87xx,
  96        .sd_blksz_fw_dl = 256,
  97};
  98
  99static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
 100        .helper         = NULL,
 101        .firmware       = "mrvl/sd8797_uapsta.bin",
 102        .reg            = &btmrvl_reg_87xx,
 103        .sd_blksz_fw_dl = 256,
 104};
 105
 106static const struct sdio_device_id btmrvl_sdio_ids[] = {
 107        /* Marvell SD8688 Bluetooth device */
 108        { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
 109                        .driver_data = (unsigned long) &btmrvl_sdio_sd8688 },
 110        /* Marvell SD8787 Bluetooth device */
 111        { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
 112                        .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
 113        /* Marvell SD8787 Bluetooth AMP device */
 114        { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911B),
 115                        .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
 116        /* Marvell SD8797 Bluetooth device */
 117        { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A),
 118                        .driver_data = (unsigned long) &btmrvl_sdio_sd8797 },
 119
 120        { }     /* Terminating entry */
 121};
 122
 123MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
 124
 125static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
 126{
 127        u8 reg;
 128        int ret;
 129
 130        reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
 131        if (!ret)
 132                card->rx_unit = reg;
 133
 134        return ret;
 135}
 136
 137static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
 138{
 139        u8 fws0, fws1;
 140        int ret;
 141
 142        *dat = 0;
 143
 144        fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 145        if (ret)
 146                return -EIO;
 147
 148        fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
 149        if (ret)
 150                return -EIO;
 151
 152        *dat = (((u16) fws1) << 8) | fws0;
 153
 154        return 0;
 155}
 156
 157static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
 158{
 159        u8 reg;
 160        int ret;
 161
 162        reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
 163        if (!ret)
 164                *dat = (u16) reg << card->rx_unit;
 165
 166        return ret;
 167}
 168
 169static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
 170                                                                u8 mask)
 171{
 172        int ret;
 173
 174        sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
 175        if (ret) {
 176                BT_ERR("Unable to enable the host interrupt!");
 177                ret = -EIO;
 178        }
 179
 180        return ret;
 181}
 182
 183static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
 184                                                                u8 mask)
 185{
 186        u8 host_int_mask;
 187        int ret;
 188
 189        host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
 190        if (ret)
 191                return -EIO;
 192
 193        host_int_mask &= ~mask;
 194
 195        sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
 196        if (ret < 0) {
 197                BT_ERR("Unable to disable the host interrupt!");
 198                return -EIO;
 199        }
 200
 201        return 0;
 202}
 203
 204static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
 205{
 206        unsigned int tries;
 207        u8 status;
 208        int ret;
 209
 210        for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
 211                status = sdio_readb(card->func, card->reg->card_status, &ret);
 212                if (ret)
 213                        goto failed;
 214                if ((status & bits) == bits)
 215                        return ret;
 216
 217                udelay(1);
 218        }
 219
 220        ret = -ETIMEDOUT;
 221
 222failed:
 223        BT_ERR("FAILED! ret=%d", ret);
 224
 225        return ret;
 226}
 227
 228static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
 229                                                                int pollnum)
 230{
 231        int ret = -ETIMEDOUT;
 232        u16 firmwarestat;
 233        unsigned int tries;
 234
 235         /* Wait for firmware to become ready */
 236        for (tries = 0; tries < pollnum; tries++) {
 237                if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
 238                        continue;
 239
 240                if (firmwarestat == FIRMWARE_READY) {
 241                        ret = 0;
 242                        break;
 243                } else {
 244                        msleep(10);
 245                }
 246        }
 247
 248        return ret;
 249}
 250
 251static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 252{
 253        const struct firmware *fw_helper = NULL;
 254        const u8 *helper = NULL;
 255        int ret;
 256        void *tmphlprbuf = NULL;
 257        int tmphlprbufsz, hlprblknow, helperlen;
 258        u8 *helperbuf;
 259        u32 tx_len;
 260
 261        ret = request_firmware(&fw_helper, card->helper,
 262                                                &card->func->dev);
 263        if ((ret < 0) || !fw_helper) {
 264                BT_ERR("request_firmware(helper) failed, error code = %d",
 265                                                                        ret);
 266                ret = -ENOENT;
 267                goto done;
 268        }
 269
 270        helper = fw_helper->data;
 271        helperlen = fw_helper->size;
 272
 273        BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
 274                                                helperlen, SDIO_BLOCK_SIZE);
 275
 276        tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 277
 278        tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
 279        if (!tmphlprbuf) {
 280                BT_ERR("Unable to allocate buffer for helper."
 281                        " Terminating download");
 282                ret = -ENOMEM;
 283                goto done;
 284        }
 285
 286        helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
 287
 288        /* Perform helper data transfer */
 289        tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
 290                        - SDIO_HEADER_LEN;
 291        hlprblknow = 0;
 292
 293        do {
 294                ret = btmrvl_sdio_poll_card_status(card,
 295                                            CARD_IO_READY | DN_LD_CARD_RDY);
 296                if (ret < 0) {
 297                        BT_ERR("Helper download poll status timeout @ %d",
 298                                hlprblknow);
 299                        goto done;
 300                }
 301
 302                /* Check if there is more data? */
 303                if (hlprblknow >= helperlen)
 304                        break;
 305
 306                if (helperlen - hlprblknow < tx_len)
 307                        tx_len = helperlen - hlprblknow;
 308
 309                /* Little-endian */
 310                helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
 311                helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
 312                helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
 313                helperbuf[3] = ((tx_len & 0xff000000) >> 24);
 314
 315                memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
 316                                tx_len);
 317
 318                /* Now send the data */
 319                ret = sdio_writesb(card->func, card->ioport, helperbuf,
 320                                FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
 321                if (ret < 0) {
 322                        BT_ERR("IO error during helper download @ %d",
 323                                hlprblknow);
 324                        goto done;
 325                }
 326
 327                hlprblknow += tx_len;
 328        } while (true);
 329
 330        BT_DBG("Transferring helper image EOF block");
 331
 332        memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
 333
 334        ret = sdio_writesb(card->func, card->ioport, helperbuf,
 335                                                        SDIO_BLOCK_SIZE);
 336        if (ret < 0) {
 337                BT_ERR("IO error in writing helper image EOF block");
 338                goto done;
 339        }
 340
 341        ret = 0;
 342
 343done:
 344        kfree(tmphlprbuf);
 345        release_firmware(fw_helper);
 346        return ret;
 347}
 348
 349static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
 350{
 351        const struct firmware *fw_firmware = NULL;
 352        const u8 *firmware = NULL;
 353        int firmwarelen, tmpfwbufsz, ret;
 354        unsigned int tries, offset;
 355        u8 base0, base1;
 356        void *tmpfwbuf = NULL;
 357        u8 *fwbuf;
 358        u16 len, blksz_dl = card->sd_blksz_fw_dl;
 359        int txlen = 0, tx_blocks = 0, count = 0;
 360
 361        ret = request_firmware(&fw_firmware, card->firmware,
 362                                                        &card->func->dev);
 363        if ((ret < 0) || !fw_firmware) {
 364                BT_ERR("request_firmware(firmware) failed, error code = %d",
 365                                                                        ret);
 366                ret = -ENOENT;
 367                goto done;
 368        }
 369
 370        firmware = fw_firmware->data;
 371        firmwarelen = fw_firmware->size;
 372
 373        BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
 374
 375        tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 376        tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
 377        if (!tmpfwbuf) {
 378                BT_ERR("Unable to allocate buffer for firmware."
 379                       " Terminating download");
 380                ret = -ENOMEM;
 381                goto done;
 382        }
 383
 384        /* Ensure aligned firmware buffer */
 385        fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
 386
 387        /* Perform firmware data transfer */
 388        offset = 0;
 389        do {
 390                ret = btmrvl_sdio_poll_card_status(card,
 391                                        CARD_IO_READY | DN_LD_CARD_RDY);
 392                if (ret < 0) {
 393                        BT_ERR("FW download with helper poll status"
 394                                                " timeout @ %d", offset);
 395                        goto done;
 396                }
 397
 398                /* Check if there is more data ? */
 399                if (offset >= firmwarelen)
 400                        break;
 401
 402                for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 403                        base0 = sdio_readb(card->func,
 404                                        card->reg->sq_read_base_addr_a0, &ret);
 405                        if (ret) {
 406                                BT_ERR("BASE0 register read failed:"
 407                                        " base0 = 0x%04X(%d)."
 408                                        " Terminating download",
 409                                        base0, base0);
 410                                ret = -EIO;
 411                                goto done;
 412                        }
 413                        base1 = sdio_readb(card->func,
 414                                        card->reg->sq_read_base_addr_a1, &ret);
 415                        if (ret) {
 416                                BT_ERR("BASE1 register read failed:"
 417                                        " base1 = 0x%04X(%d)."
 418                                        " Terminating download",
 419                                        base1, base1);
 420                                ret = -EIO;
 421                                goto done;
 422                        }
 423
 424                        len = (((u16) base1) << 8) | base0;
 425                        if (len)
 426                                break;
 427
 428                        udelay(10);
 429                }
 430
 431                if (!len)
 432                        break;
 433                else if (len > BTM_UPLD_SIZE) {
 434                        BT_ERR("FW download failure @%d, invalid length %d",
 435                                                                offset, len);
 436                        ret = -EINVAL;
 437                        goto done;
 438                }
 439
 440                txlen = len;
 441
 442                if (len & BIT(0)) {
 443                        count++;
 444                        if (count > MAX_WRITE_IOMEM_RETRY) {
 445                                BT_ERR("FW download failure @%d, "
 446                                        "over max retry count", offset);
 447                                ret = -EIO;
 448                                goto done;
 449                        }
 450                        BT_ERR("FW CRC error indicated by the helper: "
 451                                "len = 0x%04X, txlen = %d", len, txlen);
 452                        len &= ~BIT(0);
 453                        /* Set txlen to 0 so as to resend from same offset */
 454                        txlen = 0;
 455                } else {
 456                        count = 0;
 457
 458                        /* Last block ? */
 459                        if (firmwarelen - offset < txlen)
 460                                txlen = firmwarelen - offset;
 461
 462                        tx_blocks = (txlen + blksz_dl - 1) / blksz_dl;
 463
 464                        memcpy(fwbuf, &firmware[offset], txlen);
 465                }
 466
 467                ret = sdio_writesb(card->func, card->ioport, fwbuf,
 468                                                tx_blocks * blksz_dl);
 469
 470                if (ret < 0) {
 471                        BT_ERR("FW download, writesb(%d) failed @%d",
 472                                                        count, offset);
 473                        sdio_writeb(card->func, HOST_CMD53_FIN,
 474                                                card->reg->cfg, &ret);
 475                        if (ret)
 476                                BT_ERR("writeb failed (CFG)");
 477                }
 478
 479                offset += txlen;
 480        } while (true);
 481
 482        BT_DBG("FW download over, size %d bytes", offset);
 483
 484        ret = 0;
 485
 486done:
 487        kfree(tmpfwbuf);
 488        release_firmware(fw_firmware);
 489        return ret;
 490}
 491
 492static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 493{
 494        u16 buf_len = 0;
 495        int ret, buf_block_len, blksz;
 496        struct sk_buff *skb = NULL;
 497        u32 type;
 498        u8 *payload = NULL;
 499        struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
 500        struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 501
 502        if (!card || !card->func) {
 503                BT_ERR("card or function is NULL!");
 504                ret = -EINVAL;
 505                goto exit;
 506        }
 507
 508        /* Read the length of data to be transferred */
 509        ret = btmrvl_sdio_read_rx_len(card, &buf_len);
 510        if (ret < 0) {
 511                BT_ERR("read rx_len failed");
 512                ret = -EIO;
 513                goto exit;
 514        }
 515
 516        blksz = SDIO_BLOCK_SIZE;
 517        buf_block_len = (buf_len + blksz - 1) / blksz;
 518
 519        if (buf_len <= SDIO_HEADER_LEN
 520                        || (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
 521                BT_ERR("invalid packet length: %d", buf_len);
 522                ret = -EINVAL;
 523                goto exit;
 524        }
 525
 526        /* Allocate buffer */
 527        skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
 528                                                                GFP_ATOMIC);
 529        if (skb == NULL) {
 530                BT_ERR("No free skb");
 531                goto exit;
 532        }
 533
 534        if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 535                skb_put(skb, (unsigned long) skb->data &
 536                                        (BTSDIO_DMA_ALIGN - 1));
 537                skb_pull(skb, (unsigned long) skb->data &
 538                                        (BTSDIO_DMA_ALIGN - 1));
 539        }
 540
 541        payload = skb->data;
 542
 543        ret = sdio_readsb(card->func, payload, card->ioport,
 544                          buf_block_len * blksz);
 545        if (ret < 0) {
 546                BT_ERR("readsb failed: %d", ret);
 547                ret = -EIO;
 548                goto exit;
 549        }
 550
 551        /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
 552         * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
 553         */
 554
 555        buf_len = payload[0];
 556        buf_len |= (u16) payload[1] << 8;
 557        type = payload[3];
 558
 559        switch (type) {
 560        case HCI_ACLDATA_PKT:
 561        case HCI_SCODATA_PKT:
 562        case HCI_EVENT_PKT:
 563                bt_cb(skb)->pkt_type = type;
 564                skb->dev = (void *)hdev;
 565                skb_put(skb, buf_len);
 566                skb_pull(skb, SDIO_HEADER_LEN);
 567
 568                if (type == HCI_EVENT_PKT) {
 569                        if (btmrvl_check_evtpkt(priv, skb))
 570                                hci_recv_frame(skb);
 571                } else {
 572                        hci_recv_frame(skb);
 573                }
 574
 575                hdev->stat.byte_rx += buf_len;
 576                break;
 577
 578        case MRVL_VENDOR_PKT:
 579                bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
 580                skb->dev = (void *)hdev;
 581                skb_put(skb, buf_len);
 582                skb_pull(skb, SDIO_HEADER_LEN);
 583
 584                if (btmrvl_process_event(priv, skb))
 585                        hci_recv_frame(skb);
 586
 587                hdev->stat.byte_rx += buf_len;
 588                break;
 589
 590        default:
 591                BT_ERR("Unknown packet type:%d", type);
 592                print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
 593                                                blksz * buf_block_len);
 594
 595                kfree_skb(skb);
 596                skb = NULL;
 597                break;
 598        }
 599
 600exit:
 601        if (ret) {
 602                hdev->stat.err_rx++;
 603                kfree_skb(skb);
 604        }
 605
 606        return ret;
 607}
 608
 609static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
 610{
 611        ulong flags;
 612        u8 ireg;
 613        struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 614
 615        spin_lock_irqsave(&priv->driver_lock, flags);
 616        ireg = sdio_ireg;
 617        sdio_ireg = 0;
 618        spin_unlock_irqrestore(&priv->driver_lock, flags);
 619
 620        sdio_claim_host(card->func);
 621        if (ireg & DN_LD_HOST_INT_STATUS) {
 622                if (priv->btmrvl_dev.tx_dnld_rdy)
 623                        BT_DBG("tx_done already received: "
 624                                " int_status=0x%x", ireg);
 625                else
 626                        priv->btmrvl_dev.tx_dnld_rdy = true;
 627        }
 628
 629        if (ireg & UP_LD_HOST_INT_STATUS)
 630                btmrvl_sdio_card_to_host(priv);
 631
 632        sdio_release_host(card->func);
 633
 634        return 0;
 635}
 636
 637static void btmrvl_sdio_interrupt(struct sdio_func *func)
 638{
 639        struct btmrvl_private *priv;
 640        struct btmrvl_sdio_card *card;
 641        ulong flags;
 642        u8 ireg = 0;
 643        int ret;
 644
 645        card = sdio_get_drvdata(func);
 646        if (!card || !card->priv) {
 647                BT_ERR("sbi_interrupt(%p) card or priv is "
 648                                "NULL, card=%p\n", func, card);
 649                return;
 650        }
 651
 652        priv = card->priv;
 653
 654        ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
 655        if (ret) {
 656                BT_ERR("sdio_readb: read int status register failed");
 657                return;
 658        }
 659
 660        if (ireg != 0) {
 661                /*
 662                 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 663                 * Clear the interrupt status register and re-enable the
 664                 * interrupt.
 665                 */
 666                BT_DBG("ireg = 0x%x", ireg);
 667
 668                sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
 669                                        UP_LD_HOST_INT_STATUS),
 670                                card->reg->host_intstatus, &ret);
 671                if (ret) {
 672                        BT_ERR("sdio_writeb: clear int status register failed");
 673                        return;
 674                }
 675        }
 676
 677        spin_lock_irqsave(&priv->driver_lock, flags);
 678        sdio_ireg |= ireg;
 679        spin_unlock_irqrestore(&priv->driver_lock, flags);
 680
 681        btmrvl_interrupt(priv);
 682}
 683
 684static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
 685{
 686        struct sdio_func *func;
 687        u8 reg;
 688        int ret = 0;
 689
 690        if (!card || !card->func) {
 691                BT_ERR("Error: card or function is NULL!");
 692                ret = -EINVAL;
 693                goto failed;
 694        }
 695
 696        func = card->func;
 697
 698        sdio_claim_host(func);
 699
 700        ret = sdio_enable_func(func);
 701        if (ret) {
 702                BT_ERR("sdio_enable_func() failed: ret=%d", ret);
 703                ret = -EIO;
 704                goto release_host;
 705        }
 706
 707        ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
 708        if (ret) {
 709                BT_ERR("sdio_claim_irq failed: ret=%d", ret);
 710                ret = -EIO;
 711                goto disable_func;
 712        }
 713
 714        ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
 715        if (ret) {
 716                BT_ERR("cannot set SDIO block size");
 717                ret = -EIO;
 718                goto release_irq;
 719        }
 720
 721        reg = sdio_readb(func, card->reg->io_port_0, &ret);
 722        if (ret < 0) {
 723                ret = -EIO;
 724                goto release_irq;
 725        }
 726
 727        card->ioport = reg;
 728
 729        reg = sdio_readb(func, card->reg->io_port_1, &ret);
 730        if (ret < 0) {
 731                ret = -EIO;
 732                goto release_irq;
 733        }
 734
 735        card->ioport |= (reg << 8);
 736
 737        reg = sdio_readb(func, card->reg->io_port_2, &ret);
 738        if (ret < 0) {
 739                ret = -EIO;
 740                goto release_irq;
 741        }
 742
 743        card->ioport |= (reg << 16);
 744
 745        BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
 746
 747        sdio_set_drvdata(func, card);
 748
 749        sdio_release_host(func);
 750
 751        return 0;
 752
 753release_irq:
 754        sdio_release_irq(func);
 755
 756disable_func:
 757        sdio_disable_func(func);
 758
 759release_host:
 760        sdio_release_host(func);
 761
 762failed:
 763        return ret;
 764}
 765
 766static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
 767{
 768        if (card && card->func) {
 769                sdio_claim_host(card->func);
 770                sdio_release_irq(card->func);
 771                sdio_disable_func(card->func);
 772                sdio_release_host(card->func);
 773                sdio_set_drvdata(card->func, NULL);
 774        }
 775
 776        return 0;
 777}
 778
 779static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
 780{
 781        int ret;
 782
 783        if (!card || !card->func)
 784                return -EINVAL;
 785
 786        sdio_claim_host(card->func);
 787
 788        ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
 789
 790        btmrvl_sdio_get_rx_unit(card);
 791
 792        sdio_release_host(card->func);
 793
 794        return ret;
 795}
 796
 797static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
 798{
 799        int ret;
 800
 801        if (!card || !card->func)
 802                return -EINVAL;
 803
 804        sdio_claim_host(card->func);
 805
 806        ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
 807
 808        sdio_release_host(card->func);
 809
 810        return ret;
 811}
 812
 813static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
 814                                u8 *payload, u16 nb)
 815{
 816        struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 817        int ret = 0;
 818        int buf_block_len;
 819        int blksz;
 820        int i = 0;
 821        u8 *buf = NULL;
 822        void *tmpbuf = NULL;
 823        int tmpbufsz;
 824
 825        if (!card || !card->func) {
 826                BT_ERR("card or function is NULL!");
 827                return -EINVAL;
 828        }
 829
 830        buf = payload;
 831        if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
 832                tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
 833                tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
 834                if (!tmpbuf)
 835                        return -ENOMEM;
 836                buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
 837                memcpy(buf, payload, nb);
 838        }
 839
 840        blksz = SDIO_BLOCK_SIZE;
 841        buf_block_len = (nb + blksz - 1) / blksz;
 842
 843        sdio_claim_host(card->func);
 844
 845        do {
 846                /* Transfer data to card */
 847                ret = sdio_writesb(card->func, card->ioport, buf,
 848                                   buf_block_len * blksz);
 849                if (ret < 0) {
 850                        i++;
 851                        BT_ERR("i=%d writesb failed: %d", i, ret);
 852                        print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
 853                                                payload, nb);
 854                        ret = -EIO;
 855                        if (i > MAX_WRITE_IOMEM_RETRY)
 856                                goto exit;
 857                }
 858        } while (ret);
 859
 860        priv->btmrvl_dev.tx_dnld_rdy = false;
 861
 862exit:
 863        sdio_release_host(card->func);
 864        kfree(tmpbuf);
 865
 866        return ret;
 867}
 868
 869static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
 870{
 871        int ret = 0;
 872        u8 fws0;
 873        int pollnum = MAX_POLL_TRIES;
 874
 875        if (!card || !card->func) {
 876                BT_ERR("card or function is NULL!");
 877                return -EINVAL;
 878        }
 879        sdio_claim_host(card->func);
 880
 881        if (!btmrvl_sdio_verify_fw_download(card, 1)) {
 882                BT_DBG("Firmware already downloaded!");
 883                goto done;
 884        }
 885
 886        /* Check if other function driver is downloading the firmware */
 887        fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 888        if (ret) {
 889                BT_ERR("Failed to read FW downloading status!");
 890                ret = -EIO;
 891                goto done;
 892        }
 893        if (fws0) {
 894                BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
 895
 896                /* Give other function more time to download the firmware */
 897                pollnum *= 10;
 898        } else {
 899                if (card->helper) {
 900                        ret = btmrvl_sdio_download_helper(card);
 901                        if (ret) {
 902                                BT_ERR("Failed to download helper!");
 903                                ret = -EIO;
 904                                goto done;
 905                        }
 906                }
 907
 908                if (btmrvl_sdio_download_fw_w_helper(card)) {
 909                        BT_ERR("Failed to download firmware!");
 910                        ret = -EIO;
 911                        goto done;
 912                }
 913        }
 914
 915        if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
 916                BT_ERR("FW failed to be active in time!");
 917                ret = -ETIMEDOUT;
 918                goto done;
 919        }
 920
 921done:
 922        sdio_release_host(card->func);
 923
 924        return ret;
 925}
 926
 927static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
 928{
 929        struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 930        int ret = 0;
 931
 932        if (!card || !card->func) {
 933                BT_ERR("card or function is NULL!");
 934                return -EINVAL;
 935        }
 936
 937        sdio_claim_host(card->func);
 938
 939        sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
 940
 941        sdio_release_host(card->func);
 942
 943        BT_DBG("wake up firmware");
 944
 945        return ret;
 946}
 947
 948static int btmrvl_sdio_probe(struct sdio_func *func,
 949                                        const struct sdio_device_id *id)
 950{
 951        int ret = 0;
 952        struct btmrvl_private *priv = NULL;
 953        struct btmrvl_sdio_card *card = NULL;
 954
 955        BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
 956                        id->vendor, id->device, id->class, func->num);
 957
 958        card = devm_kzalloc(&func->dev, sizeof(*card), GFP_KERNEL);
 959        if (!card)
 960                return -ENOMEM;
 961
 962        card->func = func;
 963
 964        if (id->driver_data) {
 965                struct btmrvl_sdio_device *data = (void *) id->driver_data;
 966                card->helper = data->helper;
 967                card->firmware = data->firmware;
 968                card->reg = data->reg;
 969                card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
 970        }
 971
 972        if (btmrvl_sdio_register_dev(card) < 0) {
 973                BT_ERR("Failed to register BT device!");
 974                return -ENODEV;
 975        }
 976
 977        /* Disable the interrupts on the card */
 978        btmrvl_sdio_disable_host_int(card);
 979
 980        if (btmrvl_sdio_download_fw(card)) {
 981                BT_ERR("Downloading firmware failed!");
 982                ret = -ENODEV;
 983                goto unreg_dev;
 984        }
 985
 986        msleep(100);
 987
 988        btmrvl_sdio_enable_host_int(card);
 989
 990        priv = btmrvl_add_card(card);
 991        if (!priv) {
 992                BT_ERR("Initializing card failed!");
 993                ret = -ENODEV;
 994                goto disable_host_int;
 995        }
 996
 997        card->priv = priv;
 998
 999        /* Initialize the interface specific function pointers */
1000        priv->hw_host_to_card = btmrvl_sdio_host_to_card;
1001        priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
1002        priv->hw_process_int_status = btmrvl_sdio_process_int_status;
1003
1004        if (btmrvl_register_hdev(priv)) {
1005                BT_ERR("Register hdev failed!");
1006                ret = -ENODEV;
1007                goto disable_host_int;
1008        }
1009
1010        priv->btmrvl_dev.psmode = 1;
1011        btmrvl_enable_ps(priv);
1012
1013        priv->btmrvl_dev.gpio_gap = 0xffff;
1014        btmrvl_send_hscfg_cmd(priv);
1015
1016        return 0;
1017
1018disable_host_int:
1019        btmrvl_sdio_disable_host_int(card);
1020unreg_dev:
1021        btmrvl_sdio_unregister_dev(card);
1022        return ret;
1023}
1024
1025static void btmrvl_sdio_remove(struct sdio_func *func)
1026{
1027        struct btmrvl_sdio_card *card;
1028
1029        if (func) {
1030                card = sdio_get_drvdata(func);
1031                if (card) {
1032                        /* Send SHUTDOWN command & disable interrupt
1033                         * if user removes the module.
1034                         */
1035                        if (user_rmmod) {
1036                                btmrvl_send_module_cfg_cmd(card->priv,
1037                                                        MODULE_SHUTDOWN_REQ);
1038                                btmrvl_sdio_disable_host_int(card);
1039                        }
1040                        BT_DBG("unregester dev");
1041                        btmrvl_sdio_unregister_dev(card);
1042                        btmrvl_remove_card(card->priv);
1043                }
1044        }
1045}
1046
1047static int btmrvl_sdio_suspend(struct device *dev)
1048{
1049        struct sdio_func *func = dev_to_sdio_func(dev);
1050        struct btmrvl_sdio_card *card;
1051        struct btmrvl_private *priv;
1052        mmc_pm_flag_t pm_flags;
1053        struct hci_dev *hcidev;
1054
1055        if (func) {
1056                pm_flags = sdio_get_host_pm_caps(func);
1057                BT_DBG("%s: suspend: PM flags = 0x%x", sdio_func_id(func),
1058                       pm_flags);
1059                if (!(pm_flags & MMC_PM_KEEP_POWER)) {
1060                        BT_ERR("%s: cannot remain alive while suspended",
1061                               sdio_func_id(func));
1062                        return -ENOSYS;
1063                }
1064                card = sdio_get_drvdata(func);
1065                if (!card || !card->priv) {
1066                        BT_ERR("card or priv structure is not valid");
1067                        return 0;
1068                }
1069        } else {
1070                BT_ERR("sdio_func is not specified");
1071                return 0;
1072        }
1073
1074        priv = card->priv;
1075
1076        if (priv->adapter->hs_state != HS_ACTIVATED) {
1077                if (btmrvl_enable_hs(priv)) {
1078                        BT_ERR("HS not actived, suspend failed!");
1079                        return -EBUSY;
1080                }
1081        }
1082        hcidev = priv->btmrvl_dev.hcidev;
1083        BT_DBG("%s: SDIO suspend", hcidev->name);
1084        hci_suspend_dev(hcidev);
1085        skb_queue_purge(&priv->adapter->tx_queue);
1086
1087        priv->adapter->is_suspended = true;
1088
1089        /* We will keep the power when hs enabled successfully */
1090        if (priv->adapter->hs_state == HS_ACTIVATED) {
1091                BT_DBG("suspend with MMC_PM_KEEP_POWER");
1092                return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1093        } else {
1094                BT_DBG("suspend without MMC_PM_KEEP_POWER");
1095                return 0;
1096        }
1097}
1098
1099static int btmrvl_sdio_resume(struct device *dev)
1100{
1101        struct sdio_func *func = dev_to_sdio_func(dev);
1102        struct btmrvl_sdio_card *card;
1103        struct btmrvl_private *priv;
1104        mmc_pm_flag_t pm_flags;
1105        struct hci_dev *hcidev;
1106
1107        if (func) {
1108                pm_flags = sdio_get_host_pm_caps(func);
1109                BT_DBG("%s: resume: PM flags = 0x%x", sdio_func_id(func),
1110                       pm_flags);
1111                card = sdio_get_drvdata(func);
1112                if (!card || !card->priv) {
1113                        BT_ERR("card or priv structure is not valid");
1114                        return 0;
1115                }
1116        } else {
1117                BT_ERR("sdio_func is not specified");
1118                return 0;
1119        }
1120        priv = card->priv;
1121
1122        if (!priv->adapter->is_suspended) {
1123                BT_DBG("device already resumed");
1124                return 0;
1125        }
1126
1127        priv->adapter->is_suspended = false;
1128        hcidev = priv->btmrvl_dev.hcidev;
1129        BT_DBG("%s: SDIO resume", hcidev->name);
1130        hci_resume_dev(hcidev);
1131        priv->hw_wakeup_firmware(priv);
1132        priv->adapter->hs_state = HS_DEACTIVATED;
1133        BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name);
1134
1135        return 0;
1136}
1137
1138static const struct dev_pm_ops btmrvl_sdio_pm_ops = {
1139        .suspend        = btmrvl_sdio_suspend,
1140        .resume         = btmrvl_sdio_resume,
1141};
1142
1143static struct sdio_driver bt_mrvl_sdio = {
1144        .name           = "btmrvl_sdio",
1145        .id_table       = btmrvl_sdio_ids,
1146        .probe          = btmrvl_sdio_probe,
1147        .remove         = btmrvl_sdio_remove,
1148        .drv = {
1149                .owner = THIS_MODULE,
1150                .pm = &btmrvl_sdio_pm_ops,
1151        }
1152};
1153
1154static int __init btmrvl_sdio_init_module(void)
1155{
1156        if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1157                BT_ERR("SDIO Driver Registration Failed");
1158                return -ENODEV;
1159        }
1160
1161        /* Clear the flag in case user removes the card. */
1162        user_rmmod = 0;
1163
1164        return 0;
1165}
1166
1167static void __exit btmrvl_sdio_exit_module(void)
1168{
1169        /* Set the flag as user is removing this module. */
1170        user_rmmod = 1;
1171
1172        sdio_unregister_driver(&bt_mrvl_sdio);
1173}
1174
1175module_init(btmrvl_sdio_init_module);
1176module_exit(btmrvl_sdio_exit_module);
1177
1178MODULE_AUTHOR("Marvell International Ltd.");
1179MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1180MODULE_VERSION(VERSION);
1181MODULE_LICENSE("GPL v2");
1182MODULE_FIRMWARE("sd8688_helper.bin");
1183MODULE_FIRMWARE("sd8688.bin");
1184MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
1185MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");
1186
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