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 #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  */
  50 static u8 user_rmmod;
  51 static u8 sdio_ireg;
  52
  53 static 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 };
  68 static 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
  85 static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
  86         .helper         = "mrvl/sd8688_helper.bin",
  87         .firmware       = "mrvl/sd8688.bin",
  88         .reg            = &btmrvl_reg_8688,
  89         .sd_blksz_fw_dl = 64,
  90 };
  91
  92 static 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
  99 static 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
 106 static 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
 123 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
 124
 125 static 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
 137 static 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
 157 static 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
 169 static 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
 183 static 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
 204 static 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
 222 failed:
 223         BT_ERR("FAILED! ret=%d", ret);
 224
 225         return ret;
 226 }
 227
 228 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
 229                                                                 int pollnum)
 230 {
 231         u16 firmwarestat;
 232         int tries, ret;
 233
 234          /* Wait for firmware to become ready */
 235         for (tries = 0; tries < pollnum; tries++) {
 236                 sdio_claim_host(card->func);
 237                 ret = btmrvl_sdio_read_fw_status(card, &firmwarestat);
 238                 sdio_release_host(card->func);
 239                 if (ret < 0)
 240                         continue;
 241
 242                 if (firmwarestat == FIRMWARE_READY)
 243                         return 0;
 244
 245                 msleep(10);
 246         }
 247
 248         return -ETIMEDOUT;
 249 }
 250
 251 static 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
 343 done:
 344         kfree(tmphlprbuf);
 345         release_firmware(fw_helper);
 346         return ret;
 347 }
 348
 349 static 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
 486 done:
 487         kfree(tmpfwbuf);
 488         release_firmware(fw_firmware);
 489         return ret;
 490 }
 491
 492 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 493 {
 494         u16 buf_len = 0;
 495         int ret, num_blocks, 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         num_blocks = DIV_ROUND_UP(buf_len, blksz);
 518
 519         if (buf_len <= SDIO_HEADER_LEN
 520             || (num_blocks * 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(num_blocks * blksz + BTSDIO_DMA_ALIGN, GFP_ATOMIC);
 528         if (skb == NULL) {
 529                 BT_ERR("No free skb");
 530                 goto exit;
 531         }
 532
 533         if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 534                 skb_put(skb, (unsigned long) skb->data &
 535                                         (BTSDIO_DMA_ALIGN - 1));
 536                 skb_pull(skb, (unsigned long) skb->data &
 537                                         (BTSDIO_DMA_ALIGN - 1));
 538         }
 539
 540         payload = skb->data;
 541
 542         ret = sdio_readsb(card->func, payload, card->ioport,
 543                           num_blocks * blksz);
 544         if (ret < 0) {
 545                 BT_ERR("readsb failed: %d", ret);
 546                 ret = -EIO;
 547                 goto exit;
 548         }
 549
 550         /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
 551          * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
 552          */
 553
 554         buf_len = payload[0];
 555         buf_len |= payload[1] << 8;
 556         buf_len |= payload[2] << 16;
 557
 558         if (buf_len > blksz * num_blocks) {
 559                 BT_ERR("Skip incorrect packet: hdrlen %d buffer %d",
 560                        buf_len, blksz * num_blocks);
 561                 ret = -EIO;
 562                 goto exit;
 563         }
 564
 565         type = payload[3];
 566
 567         switch (type) {
 568         case HCI_ACLDATA_PKT:
 569         case HCI_SCODATA_PKT:
 570         case HCI_EVENT_PKT:
 571                 bt_cb(skb)->pkt_type = type;
 572                 skb->dev = (void *)hdev;
 573                 skb_put(skb, buf_len);
 574                 skb_pull(skb, SDIO_HEADER_LEN);
 575
 576                 if (type == HCI_EVENT_PKT) {
 577                         if (btmrvl_check_evtpkt(priv, skb))
 578                                 hci_recv_frame(skb);
 579                 } else {
 580                         hci_recv_frame(skb);
 581                 }
 582
 583                 hdev->stat.byte_rx += buf_len;
 584                 break;
 585
 586         case MRVL_VENDOR_PKT:
 587                 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
 588                 skb->dev = (void *)hdev;
 589                 skb_put(skb, buf_len);
 590                 skb_pull(skb, SDIO_HEADER_LEN);
 591
 592                 if (btmrvl_process_event(priv, skb))
 593                         hci_recv_frame(skb);
 594
 595                 hdev->stat.byte_rx += buf_len;
 596                 break;
 597
 598         default:
 599                 BT_ERR("Unknown packet type:%d", type);
 600                 BT_ERR("hex: %*ph", blksz * num_blocks, payload);
 601
 602                 kfree_skb(skb);
 603                 skb = NULL;
 604                 break;
 605         }
 606
 607 exit:
 608         if (ret) {
 609                 hdev->stat.err_rx++;
 610                 kfree_skb(skb);
 611         }
 612
 613         return ret;
 614 }
 615
 616 static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
 617 {
 618         ulong flags;
 619         u8 ireg;
 620         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 621
 622         spin_lock_irqsave(&priv->driver_lock, flags);
 623         ireg = sdio_ireg;
 624         sdio_ireg = 0;
 625         spin_unlock_irqrestore(&priv->driver_lock, flags);
 626
 627         sdio_claim_host(card->func);
 628         if (ireg & DN_LD_HOST_INT_STATUS) {
 629                 if (priv->btmrvl_dev.tx_dnld_rdy)
 630                         BT_DBG("tx_done already received: "
 631                                 " int_status=0x%x", ireg);
 632                 else
 633                         priv->btmrvl_dev.tx_dnld_rdy = true;
 634         }
 635
 636         if (ireg & UP_LD_HOST_INT_STATUS)
 637                 btmrvl_sdio_card_to_host(priv);
 638
 639         sdio_release_host(card->func);
 640
 641         return 0;
 642 }
 643
 644 static void btmrvl_sdio_interrupt(struct sdio_func *func)
 645 {
 646         struct btmrvl_private *priv;
 647         struct btmrvl_sdio_card *card;
 648         ulong flags;
 649         u8 ireg = 0;
 650         int ret;
 651
 652         card = sdio_get_drvdata(func);
 653         if (!card || !card->priv) {
 654                 BT_ERR("sbi_interrupt(%p) card or priv is "
 655                                 "NULL, card=%p\n", func, card);
 656                 return;
 657         }
 658
 659         priv = card->priv;
 660
 661         ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
 662         if (ret) {
 663                 BT_ERR("sdio_readb: read int status register failed");
 664                 return;
 665         }
 666
 667         if (ireg != 0) {
 668                 /*
 669                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 670                  * Clear the interrupt status register and re-enable the
 671                  * interrupt.
 672                  */
 673                 BT_DBG("ireg = 0x%x", ireg);
 674
 675                 sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
 676                                         UP_LD_HOST_INT_STATUS),
 677                                 card->reg->host_intstatus, &ret);
 678                 if (ret) {
 679                         BT_ERR("sdio_writeb: clear int status register failed");
 680                         return;
 681                 }
 682         }
 683
 684         spin_lock_irqsave(&priv->driver_lock, flags);
 685         sdio_ireg |= ireg;
 686         spin_unlock_irqrestore(&priv->driver_lock, flags);
 687
 688         btmrvl_interrupt(priv);
 689 }
 690
 691 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
 692 {
 693         struct sdio_func *func;
 694         u8 reg;
 695         int ret = 0;
 696
 697         if (!card || !card->func) {
 698                 BT_ERR("Error: card or function is NULL!");
 699                 ret = -EINVAL;
 700                 goto failed;
 701         }
 702
 703         func = card->func;
 704
 705         sdio_claim_host(func);
 706
 707         ret = sdio_enable_func(func);
 708         if (ret) {
 709                 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
 710                 ret = -EIO;
 711                 goto release_host;
 712         }
 713
 714         ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
 715         if (ret) {
 716                 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
 717                 ret = -EIO;
 718                 goto disable_func;
 719         }
 720
 721         ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
 722         if (ret) {
 723                 BT_ERR("cannot set SDIO block size");
 724                 ret = -EIO;
 725                 goto release_irq;
 726         }
 727
 728         reg = sdio_readb(func, card->reg->io_port_0, &ret);
 729         if (ret < 0) {
 730                 ret = -EIO;
 731                 goto release_irq;
 732         }
 733
 734         card->ioport = reg;
 735
 736         reg = sdio_readb(func, card->reg->io_port_1, &ret);
 737         if (ret < 0) {
 738                 ret = -EIO;
 739                 goto release_irq;
 740         }
 741
 742         card->ioport |= (reg << 8);
 743
 744         reg = sdio_readb(func, card->reg->io_port_2, &ret);
 745         if (ret < 0) {
 746                 ret = -EIO;
 747                 goto release_irq;
 748         }
 749
 750         card->ioport |= (reg << 16);
 751
 752         BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
 753
 754         sdio_set_drvdata(func, card);
 755
 756         sdio_release_host(func);
 757
 758         return 0;
 759
 760 release_irq:
 761         sdio_release_irq(func);
 762
 763 disable_func:
 764         sdio_disable_func(func);
 765
 766 release_host:
 767         sdio_release_host(func);
 768
 769 failed:
 770         return ret;
 771 }
 772
 773 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
 774 {
 775         if (card && card->func) {
 776                 sdio_claim_host(card->func);
 777                 sdio_release_irq(card->func);
 778                 sdio_disable_func(card->func);
 779                 sdio_release_host(card->func);
 780                 sdio_set_drvdata(card->func, NULL);
 781         }
 782
 783         return 0;
 784 }
 785
 786 static int btmrvl_sdio_enable_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_enable_host_int_mask(card, HIM_ENABLE);
 796
 797         btmrvl_sdio_get_rx_unit(card);
 798
 799         sdio_release_host(card->func);
 800
 801         return ret;
 802 }
 803
 804 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
 805 {
 806         int ret;
 807
 808         if (!card || !card->func)
 809                 return -EINVAL;
 810
 811         sdio_claim_host(card->func);
 812
 813         ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
 814
 815         sdio_release_host(card->func);
 816
 817         return ret;
 818 }
 819
 820 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
 821                                 u8 *payload, u16 nb)
 822 {
 823         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 824         int ret = 0;
 825         int buf_block_len;
 826         int blksz;
 827         int i = 0;
 828         u8 *buf = NULL;
 829         void *tmpbuf = NULL;
 830         int tmpbufsz;
 831
 832         if (!card || !card->func) {
 833                 BT_ERR("card or function is NULL!");
 834                 return -EINVAL;
 835         }
 836
 837         buf = payload;
 838         if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
 839                 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
 840                 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
 841                 if (!tmpbuf)
 842                         return -ENOMEM;
 843                 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
 844                 memcpy(buf, payload, nb);
 845         }
 846
 847         blksz = SDIO_BLOCK_SIZE;
 848         buf_block_len = (nb + blksz - 1) / blksz;
 849
 850         sdio_claim_host(card->func);
 851
 852         do {
 853                 /* Transfer data to card */
 854                 ret = sdio_writesb(card->func, card->ioport, buf,
 855                                    buf_block_len * blksz);
 856                 if (ret < 0) {
 857                         i++;
 858                         BT_ERR("i=%d writesb failed: %d", i, ret);
 859                         BT_ERR("hex: %*ph", nb, payload);
 860                         ret = -EIO;
 861                         if (i > MAX_WRITE_IOMEM_RETRY)
 862                                 goto exit;
 863                 }
 864         } while (ret);
 865
 866         priv->btmrvl_dev.tx_dnld_rdy = false;
 867
 868 exit:
 869         sdio_release_host(card->func);
 870         kfree(tmpbuf);
 871
 872         return ret;
 873 }
 874
 875 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
 876 {
 877         int ret;
 878         u8 fws0;
 879         int pollnum = MAX_POLL_TRIES;
 880
 881         if (!card || !card->func) {
 882                 BT_ERR("card or function is NULL!");
 883                 return -EINVAL;
 884         }
 885
 886         if (!btmrvl_sdio_verify_fw_download(card, 1)) {
 887                 BT_DBG("Firmware already downloaded!");
 888                 return 0;
 889         }
 890
 891         sdio_claim_host(card->func);
 892
 893         /* Check if other function driver is downloading the firmware */
 894         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 895         if (ret) {
 896                 BT_ERR("Failed to read FW downloading status!");
 897                 ret = -EIO;
 898                 goto done;
 899         }
 900         if (fws0) {
 901                 BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
 902
 903                 /* Give other function more time to download the firmware */
 904                 pollnum *= 10;
 905         } else {
 906                 if (card->helper) {
 907                         ret = btmrvl_sdio_download_helper(card);
 908                         if (ret) {
 909                                 BT_ERR("Failed to download helper!");
 910                                 ret = -EIO;
 911                                 goto done;
 912                         }
 913                 }
 914
 915                 if (btmrvl_sdio_download_fw_w_helper(card)) {
 916                         BT_ERR("Failed to download firmware!");
 917                         ret = -EIO;
 918                         goto done;
 919                 }
 920         }
 921
 922         sdio_release_host(card->func);
 923
 924         /*
 925          * winner or not, with this test the FW synchronizes when the
 926          * module can continue its initialization
 927          */
 928         if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
 929                 BT_ERR("FW failed to be active in time!");
 930                 return -ETIMEDOUT;
 931         }
 932
 933         return 0;
 934
 935 done:
 936         sdio_release_host(card->func);
 937         return ret;
 938 }
 939
 940 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
 941 {
 942         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 943         int ret = 0;
 944
 945         if (!card || !card->func) {
 946                 BT_ERR("card or function is NULL!");
 947                 return -EINVAL;
 948         }
 949
 950         sdio_claim_host(card->func);
 951
 952         sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
 953
 954         sdio_release_host(card->func);
 955
 956         BT_DBG("wake up firmware");
 957
 958         return ret;
 959 }
 960
 961 static int btmrvl_sdio_probe(struct sdio_func *func,
 962                                         const struct sdio_device_id *id)
 963 {
 964         int ret = 0;
 965         struct btmrvl_private *priv = NULL;
 966         struct btmrvl_sdio_card *card = NULL;
 967
 968         BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
 969                         id->vendor, id->device, id->class, func->num);
 970
 971         card = devm_kzalloc(&func->dev, sizeof(*card), GFP_KERNEL);
 972         if (!card)
 973                 return -ENOMEM;
 974
 975         card->func = func;
 976
 977         if (id->driver_data) {
 978                 struct btmrvl_sdio_device *data = (void *) id->driver_data;
 979                 card->helper = data->helper;
 980                 card->firmware = data->firmware;
 981                 card->reg = data->reg;
 982                 card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
 983         }
 984
 985         if (btmrvl_sdio_register_dev(card) < 0) {
 986                 BT_ERR("Failed to register BT device!");
 987                 return -ENODEV;
 988         }
 989
 990         /* Disable the interrupts on the card */
 991         btmrvl_sdio_disable_host_int(card);
 992
 993         if (btmrvl_sdio_download_fw(card)) {
 994                 BT_ERR("Downloading firmware failed!");
 995                 ret = -ENODEV;
 996                 goto unreg_dev;
 997         }
 998
 999         btmrvl_sdio_enable_host_int(card);
1000
1001         priv = btmrvl_add_card(card);
1002         if (!priv) {
1003                 BT_ERR("Initializing card failed!");
1004                 ret = -ENODEV;
1005                 goto disable_host_int;
1006         }
1007
1008         card->priv = priv;
1009
1010         /* Initialize the interface specific function pointers */
1011         priv->hw_host_to_card = btmrvl_sdio_host_to_card;
1012         priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
1013         priv->hw_process_int_status = btmrvl_sdio_process_int_status;
1014
1015         if (btmrvl_register_hdev(priv)) {
1016                 BT_ERR("Register hdev failed!");
1017                 ret = -ENODEV;
1018                 goto disable_host_int;
1019         }
1020
1021         priv->btmrvl_dev.psmode = 1;
1022         btmrvl_enable_ps(priv);
1023
1024         priv->btmrvl_dev.gpio_gap = 0xffff;
1025         btmrvl_send_hscfg_cmd(priv);
1026
1027         return 0;
1028
1029 disable_host_int:
1030         btmrvl_sdio_disable_host_int(card);
1031 unreg_dev:
1032         btmrvl_sdio_unregister_dev(card);
1033         return ret;
1034 }
1035
1036 static void btmrvl_sdio_remove(struct sdio_func *func)
1037 {
1038         struct btmrvl_sdio_card *card;
1039
1040         if (func) {
1041                 card = sdio_get_drvdata(func);
1042                 if (card) {
1043                         /* Send SHUTDOWN command & disable interrupt
1044                          * if user removes the module.
1045                          */
1046                         if (user_rmmod) {
1047                                 btmrvl_send_module_cfg_cmd(card->priv,
1048                                                         MODULE_SHUTDOWN_REQ);
1049                                 btmrvl_sdio_disable_host_int(card);
1050                         }
1051                         BT_DBG("unregester dev");
1052                         btmrvl_sdio_unregister_dev(card);
1053                         btmrvl_remove_card(card->priv);
1054                 }
1055         }
1056 }
1057
1058 static int btmrvl_sdio_suspend(struct device *dev)
1059 {
1060         struct sdio_func *func = dev_to_sdio_func(dev);
1061         struct btmrvl_sdio_card *card;
1062         struct btmrvl_private *priv;
1063         mmc_pm_flag_t pm_flags;
1064         struct hci_dev *hcidev;
1065
1066         if (func) {
1067                 pm_flags = sdio_get_host_pm_caps(func);
1068                 BT_DBG("%s: suspend: PM flags = 0x%x", sdio_func_id(func),
1069                        pm_flags);
1070                 if (!(pm_flags & MMC_PM_KEEP_POWER)) {
1071                         BT_ERR("%s: cannot remain alive while suspended",
1072                                sdio_func_id(func));
1073                         return -ENOSYS;
1074                 }
1075                 card = sdio_get_drvdata(func);
1076                 if (!card || !card->priv) {
1077                         BT_ERR("card or priv structure is not valid");
1078                         return 0;
1079                 }
1080         } else {
1081                 BT_ERR("sdio_func is not specified");
1082                 return 0;
1083         }
1084
1085         priv = card->priv;
1086
1087         if (priv->adapter->hs_state != HS_ACTIVATED) {
1088                 if (btmrvl_enable_hs(priv)) {
1089                         BT_ERR("HS not actived, suspend failed!");
1090                         return -EBUSY;
1091                 }
1092         }
1093         hcidev = priv->btmrvl_dev.hcidev;
1094         BT_DBG("%s: SDIO suspend", hcidev->name);
1095         hci_suspend_dev(hcidev);
1096         skb_queue_purge(&priv->adapter->tx_queue);
1097
1098         priv->adapter->is_suspended = true;
1099
1100         /* We will keep the power when hs enabled successfully */
1101         if (priv->adapter->hs_state == HS_ACTIVATED) {
1102                 BT_DBG("suspend with MMC_PM_KEEP_POWER");
1103                 return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1104         } else {
1105                 BT_DBG("suspend without MMC_PM_KEEP_POWER");
1106                 return 0;
1107         }
1108 }
1109
1110 static int btmrvl_sdio_resume(struct device *dev)
1111 {
1112         struct sdio_func *func = dev_to_sdio_func(dev);
1113         struct btmrvl_sdio_card *card;
1114         struct btmrvl_private *priv;
1115         mmc_pm_flag_t pm_flags;
1116         struct hci_dev *hcidev;
1117
1118         if (func) {
1119                 pm_flags = sdio_get_host_pm_caps(func);
1120                 BT_DBG("%s: resume: PM flags = 0x%x", sdio_func_id(func),
1121                        pm_flags);
1122                 card = sdio_get_drvdata(func);
1123                 if (!card || !card->priv) {
1124                         BT_ERR("card or priv structure is not valid");
1125                         return 0;
1126                 }
1127         } else {
1128                 BT_ERR("sdio_func is not specified");
1129                 return 0;
1130         }
1131         priv = card->priv;
1132
1133         if (!priv->adapter->is_suspended) {
1134                 BT_DBG("device already resumed");
1135                 return 0;
1136         }
1137
1138         priv->adapter->is_suspended = false;
1139         hcidev = priv->btmrvl_dev.hcidev;
1140         BT_DBG("%s: SDIO resume", hcidev->name);
1141         hci_resume_dev(hcidev);
1142         priv->hw_wakeup_firmware(priv);
1143         priv->adapter->hs_state = HS_DEACTIVATED;
1144         BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name);
1145
1146         return 0;
1147 }
1148
1149 static const struct dev_pm_ops btmrvl_sdio_pm_ops = {
1150         .suspend        = btmrvl_sdio_suspend,
1151         .resume         = btmrvl_sdio_resume,
1152 };
1153
1154 static struct sdio_driver bt_mrvl_sdio = {
1155         .name           = "btmrvl_sdio",
1156         .id_table       = btmrvl_sdio_ids,
1157         .probe          = btmrvl_sdio_probe,
1158         .remove         = btmrvl_sdio_remove,
1159         .drv = {
1160                 .owner = THIS_MODULE,
1161                 .pm = &btmrvl_sdio_pm_ops,
1162         }
1163 };
1164
1165 static int __init btmrvl_sdio_init_module(void)
1166 {
1167         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1168                 BT_ERR("SDIO Driver Registration Failed");
1169                 return -ENODEV;
1170         }
1171
1172         /* Clear the flag in case user removes the card. */
1173         user_rmmod = 0;
1174
1175         return 0;
1176 }
1177
1178 static void __exit btmrvl_sdio_exit_module(void)
1179 {
1180         /* Set the flag as user is removing this module. */
1181         user_rmmod = 1;
1182
1183         sdio_unregister_driver(&bt_mrvl_sdio);
1184 }
1185
1186 module_init(btmrvl_sdio_init_module);
1187 module_exit(btmrvl_sdio_exit_module);
1188
1189 MODULE_AUTHOR("Marvell International Ltd.");
1190 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1191 MODULE_VERSION(VERSION);
1192 MODULE_LICENSE("GPL v2");
1193 MODULE_FIRMWARE("mrvl/sd8688_helper.bin");
1194 MODULE_FIRMWARE("mrvl/sd8688.bin");
1195 MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
1196 MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");