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         = "sd8688_helper.bin",
  87         .firmware       = "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 SD8797 Bluetooth device */
 114         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A),
 115                         .driver_data = (unsigned long) &btmrvl_sdio_sd8797 },
 116
 117         { }     /* Terminating entry */
 118 };
 119
 120 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
 121
 122 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
 123 {
 124         u8 reg;
 125         int ret;
 126
 127         reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
 128         if (!ret)
 129                 card->rx_unit = reg;
 130
 131         return ret;
 132 }
 133
 134 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
 135 {
 136         u8 fws0, fws1;
 137         int ret;
 138
 139         *dat = 0;
 140
 141         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 142         if (ret)
 143                 return -EIO;
 144
 145         fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
 146         if (ret)
 147                 return -EIO;
 148
 149         *dat = (((u16) fws1) << 8) | fws0;
 150
 151         return 0;
 152 }
 153
 154 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
 155 {
 156         u8 reg;
 157         int ret;
 158
 159         reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
 160         if (!ret)
 161                 *dat = (u16) reg << card->rx_unit;
 162
 163         return ret;
 164 }
 165
 166 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
 167                                                                 u8 mask)
 168 {
 169         int ret;
 170
 171         sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
 172         if (ret) {
 173                 BT_ERR("Unable to enable the host interrupt!");
 174                 ret = -EIO;
 175         }
 176
 177         return ret;
 178 }
 179
 180 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
 181                                                                 u8 mask)
 182 {
 183         u8 host_int_mask;
 184         int ret;
 185
 186         host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
 187         if (ret)
 188                 return -EIO;
 189
 190         host_int_mask &= ~mask;
 191
 192         sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
 193         if (ret < 0) {
 194                 BT_ERR("Unable to disable the host interrupt!");
 195                 return -EIO;
 196         }
 197
 198         return 0;
 199 }
 200
 201 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
 202 {
 203         unsigned int tries;
 204         u8 status;
 205         int ret;
 206
 207         for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
 208                 status = sdio_readb(card->func, card->reg->card_status, &ret);
 209                 if (ret)
 210                         goto failed;
 211                 if ((status & bits) == bits)
 212                         return ret;
 213
 214                 udelay(1);
 215         }
 216
 217         ret = -ETIMEDOUT;
 218
 219 failed:
 220         BT_ERR("FAILED! ret=%d", ret);
 221
 222         return ret;
 223 }
 224
 225 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
 226                                                                 int pollnum)
 227 {
 228         int ret = -ETIMEDOUT;
 229         u16 firmwarestat;
 230         unsigned int tries;
 231
 232          /* Wait for firmware to become ready */
 233         for (tries = 0; tries < pollnum; tries++) {
 234                 if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0)
 235                         continue;
 236
 237                 if (firmwarestat == FIRMWARE_READY) {
 238                         ret = 0;
 239                         break;
 240                 } else {
 241                         msleep(10);
 242                 }
 243         }
 244
 245         return ret;
 246 }
 247
 248 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 249 {
 250         const struct firmware *fw_helper = NULL;
 251         const u8 *helper = NULL;
 252         int ret;
 253         void *tmphlprbuf = NULL;
 254         int tmphlprbufsz, hlprblknow, helperlen;
 255         u8 *helperbuf;
 256         u32 tx_len;
 257
 258         ret = request_firmware(&fw_helper, card->helper,
 259                                                 &card->func->dev);
 260         if ((ret < 0) || !fw_helper) {
 261                 BT_ERR("request_firmware(helper) failed, error code = %d",
 262                                                                         ret);
 263                 ret = -ENOENT;
 264                 goto done;
 265         }
 266
 267         helper = fw_helper->data;
 268         helperlen = fw_helper->size;
 269
 270         BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
 271                                                 helperlen, SDIO_BLOCK_SIZE);
 272
 273         tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 274
 275         tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
 276         if (!tmphlprbuf) {
 277                 BT_ERR("Unable to allocate buffer for helper."
 278                         " Terminating download");
 279                 ret = -ENOMEM;
 280                 goto done;
 281         }
 282
 283         helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
 284
 285         /* Perform helper data transfer */
 286         tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
 287                         - SDIO_HEADER_LEN;
 288         hlprblknow = 0;
 289
 290         do {
 291                 ret = btmrvl_sdio_poll_card_status(card,
 292                                             CARD_IO_READY | DN_LD_CARD_RDY);
 293                 if (ret < 0) {
 294                         BT_ERR("Helper download poll status timeout @ %d",
 295                                 hlprblknow);
 296                         goto done;
 297                 }
 298
 299                 /* Check if there is more data? */
 300                 if (hlprblknow >= helperlen)
 301                         break;
 302
 303                 if (helperlen - hlprblknow < tx_len)
 304                         tx_len = helperlen - hlprblknow;
 305
 306                 /* Little-endian */
 307                 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
 308                 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
 309                 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
 310                 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
 311
 312                 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
 313                                 tx_len);
 314
 315                 /* Now send the data */
 316                 ret = sdio_writesb(card->func, card->ioport, helperbuf,
 317                                 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
 318                 if (ret < 0) {
 319                         BT_ERR("IO error during helper download @ %d",
 320                                 hlprblknow);
 321                         goto done;
 322                 }
 323
 324                 hlprblknow += tx_len;
 325         } while (true);
 326
 327         BT_DBG("Transferring helper image EOF block");
 328
 329         memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
 330
 331         ret = sdio_writesb(card->func, card->ioport, helperbuf,
 332                                                         SDIO_BLOCK_SIZE);
 333         if (ret < 0) {
 334                 BT_ERR("IO error in writing helper image EOF block");
 335                 goto done;
 336         }
 337
 338         ret = 0;
 339
 340 done:
 341         kfree(tmphlprbuf);
 342         if (fw_helper)
 343                 release_firmware(fw_helper);
 344
 345         return ret;
 346 }
 347
 348 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
 349 {
 350         const struct firmware *fw_firmware = NULL;
 351         const u8 *firmware = NULL;
 352         int firmwarelen, tmpfwbufsz, ret;
 353         unsigned int tries, offset;
 354         u8 base0, base1;
 355         void *tmpfwbuf = NULL;
 356         u8 *fwbuf;
 357         u16 len, blksz_dl = card->sd_blksz_fw_dl;
 358         int txlen = 0, tx_blocks = 0, count = 0;
 359
 360         ret = request_firmware(&fw_firmware, card->firmware,
 361                                                         &card->func->dev);
 362         if ((ret < 0) || !fw_firmware) {
 363                 BT_ERR("request_firmware(firmware) failed, error code = %d",
 364                                                                         ret);
 365                 ret = -ENOENT;
 366                 goto done;
 367         }
 368
 369         firmware = fw_firmware->data;
 370         firmwarelen = fw_firmware->size;
 371
 372         BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
 373
 374         tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 375         tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
 376         if (!tmpfwbuf) {
 377                 BT_ERR("Unable to allocate buffer for firmware."
 378                        " Terminating download");
 379                 ret = -ENOMEM;
 380                 goto done;
 381         }
 382
 383         /* Ensure aligned firmware buffer */
 384         fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
 385
 386         /* Perform firmware data transfer */
 387         offset = 0;
 388         do {
 389                 ret = btmrvl_sdio_poll_card_status(card,
 390                                         CARD_IO_READY | DN_LD_CARD_RDY);
 391                 if (ret < 0) {
 392                         BT_ERR("FW download with helper poll status"
 393                                                 " timeout @ %d", offset);
 394                         goto done;
 395                 }
 396
 397                 /* Check if there is more data ? */
 398                 if (offset >= firmwarelen)
 399                         break;
 400
 401                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 402                         base0 = sdio_readb(card->func,
 403                                         card->reg->sq_read_base_addr_a0, &ret);
 404                         if (ret) {
 405                                 BT_ERR("BASE0 register read failed:"
 406                                         " base0 = 0x%04X(%d)."
 407                                         " Terminating download",
 408                                         base0, base0);
 409                                 ret = -EIO;
 410                                 goto done;
 411                         }
 412                         base1 = sdio_readb(card->func,
 413                                         card->reg->sq_read_base_addr_a1, &ret);
 414                         if (ret) {
 415                                 BT_ERR("BASE1 register read failed:"
 416                                         " base1 = 0x%04X(%d)."
 417                                         " Terminating download",
 418                                         base1, base1);
 419                                 ret = -EIO;
 420                                 goto done;
 421                         }
 422
 423                         len = (((u16) base1) << 8) | base0;
 424                         if (len)
 425                                 break;
 426
 427                         udelay(10);
 428                 }
 429
 430                 if (!len)
 431                         break;
 432                 else if (len > BTM_UPLD_SIZE) {
 433                         BT_ERR("FW download failure @%d, invalid length %d",
 434                                                                 offset, len);
 435                         ret = -EINVAL;
 436                         goto done;
 437                 }
 438
 439                 txlen = len;
 440
 441                 if (len & BIT(0)) {
 442                         count++;
 443                         if (count > MAX_WRITE_IOMEM_RETRY) {
 444                                 BT_ERR("FW download failure @%d, "
 445                                         "over max retry count", offset);
 446                                 ret = -EIO;
 447                                 goto done;
 448                         }
 449                         BT_ERR("FW CRC error indicated by the helper: "
 450                                 "len = 0x%04X, txlen = %d", len, txlen);
 451                         len &= ~BIT(0);
 452                         /* Set txlen to 0 so as to resend from same offset */
 453                         txlen = 0;
 454                 } else {
 455                         count = 0;
 456
 457                         /* Last block ? */
 458                         if (firmwarelen - offset < txlen)
 459                                 txlen = firmwarelen - offset;
 460
 461                         tx_blocks = (txlen + blksz_dl - 1) / blksz_dl;
 462
 463                         memcpy(fwbuf, &firmware[offset], txlen);
 464                 }
 465
 466                 ret = sdio_writesb(card->func, card->ioport, fwbuf,
 467                                                 tx_blocks * blksz_dl);
 468
 469                 if (ret < 0) {
 470                         BT_ERR("FW download, writesb(%d) failed @%d",
 471                                                         count, offset);
 472                         sdio_writeb(card->func, HOST_CMD53_FIN,
 473                                                 card->reg->cfg, &ret);
 474                         if (ret)
 475                                 BT_ERR("writeb failed (CFG)");
 476                 }
 477
 478                 offset += txlen;
 479         } while (true);
 480
 481         BT_DBG("FW download over, size %d bytes", offset);
 482
 483         ret = 0;
 484
 485 done:
 486         kfree(tmpfwbuf);
 487
 488         if (fw_firmware)
 489                 release_firmware(fw_firmware);
 490
 491         return ret;
 492 }
 493
 494 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 495 {
 496         u16 buf_len = 0;
 497         int ret, buf_block_len, blksz;
 498         struct sk_buff *skb = NULL;
 499         u32 type;
 500         u8 *payload = NULL;
 501         struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
 502         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 503
 504         if (!card || !card->func) {
 505                 BT_ERR("card or function is NULL!");
 506                 ret = -EINVAL;
 507                 goto exit;
 508         }
 509
 510         /* Read the length of data to be transferred */
 511         ret = btmrvl_sdio_read_rx_len(card, &buf_len);
 512         if (ret < 0) {
 513                 BT_ERR("read rx_len failed");
 514                 ret = -EIO;
 515                 goto exit;
 516         }
 517
 518         blksz = SDIO_BLOCK_SIZE;
 519         buf_block_len = (buf_len + blksz - 1) / blksz;
 520
 521         if (buf_len <= SDIO_HEADER_LEN
 522                         || (buf_block_len * blksz) > ALLOC_BUF_SIZE) {
 523                 BT_ERR("invalid packet length: %d", buf_len);
 524                 ret = -EINVAL;
 525                 goto exit;
 526         }
 527
 528         /* Allocate buffer */
 529         skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN,
 530                                                                 GFP_ATOMIC);
 531         if (skb == NULL) {
 532                 BT_ERR("No free skb");
 533                 goto exit;
 534         }
 535
 536         if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 537                 skb_put(skb, (unsigned long) skb->data &
 538                                         (BTSDIO_DMA_ALIGN - 1));
 539                 skb_pull(skb, (unsigned long) skb->data &
 540                                         (BTSDIO_DMA_ALIGN - 1));
 541         }
 542
 543         payload = skb->data;
 544
 545         ret = sdio_readsb(card->func, payload, card->ioport,
 546                           buf_block_len * blksz);
 547         if (ret < 0) {
 548                 BT_ERR("readsb failed: %d", ret);
 549                 ret = -EIO;
 550                 goto exit;
 551         }
 552
 553         /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
 554          * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
 555          */
 556
 557         buf_len = payload[0];
 558         buf_len |= (u16) payload[1] << 8;
 559         type = payload[3];
 560
 561         switch (type) {
 562         case HCI_ACLDATA_PKT:
 563         case HCI_SCODATA_PKT:
 564         case HCI_EVENT_PKT:
 565                 bt_cb(skb)->pkt_type = type;
 566                 skb->dev = (void *)hdev;
 567                 skb_put(skb, buf_len);
 568                 skb_pull(skb, SDIO_HEADER_LEN);
 569
 570                 if (type == HCI_EVENT_PKT)
 571                         btmrvl_check_evtpkt(priv, skb);
 572
 573                 hci_recv_frame(skb);
 574                 hdev->stat.byte_rx += buf_len;
 575                 break;
 576
 577         case MRVL_VENDOR_PKT:
 578                 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
 579                 skb->dev = (void *)hdev;
 580                 skb_put(skb, buf_len);
 581                 skb_pull(skb, SDIO_HEADER_LEN);
 582
 583                 if (btmrvl_process_event(priv, skb))
 584                         hci_recv_frame(skb);
 585
 586                 hdev->stat.byte_rx += buf_len;
 587                 break;
 588
 589         default:
 590                 BT_ERR("Unknown packet type:%d", type);
 591                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload,
 592                                                 blksz * buf_block_len);
 593
 594                 kfree_skb(skb);
 595                 skb = NULL;
 596                 break;
 597         }
 598
 599 exit:
 600         if (ret) {
 601                 hdev->stat.err_rx++;
 602                 if (skb)
 603                         kfree_skb(skb);
 604         }
 605
 606         return ret;
 607 }
 608
 609 static 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
 637 static 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
 684 static 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
 753 release_irq:
 754         sdio_release_irq(func);
 755
 756 disable_func:
 757         sdio_disable_func(func);
 758
 759 release_host:
 760         sdio_release_host(func);
 761
 762 failed:
 763         return ret;
 764 }
 765
 766 static 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
 779 static 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
 797 static 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
 813 static 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
 862 exit:
 863         sdio_release_host(card->func);
 864         kfree(tmpbuf);
 865
 866         return ret;
 867 }
 868
 869 static 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
 921 done:
 922         sdio_release_host(card->func);
 923
 924         return ret;
 925 }
 926
 927 static 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
 948 static 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 = kzalloc(sizeof(*card), GFP_KERNEL);
 959         if (!card) {
 960                 ret = -ENOMEM;
 961                 goto done;
 962         }
 963
 964         card->func = func;
 965
 966         if (id->driver_data) {
 967                 struct btmrvl_sdio_device *data = (void *) id->driver_data;
 968                 card->helper = data->helper;
 969                 card->firmware = data->firmware;
 970                 card->reg = data->reg;
 971                 card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
 972         }
 973
 974         if (btmrvl_sdio_register_dev(card) < 0) {
 975                 BT_ERR("Failed to register BT device!");
 976                 ret = -ENODEV;
 977                 goto free_card;
 978         }
 979
 980         /* Disable the interrupts on the card */
 981         btmrvl_sdio_disable_host_int(card);
 982
 983         if (btmrvl_sdio_download_fw(card)) {
 984                 BT_ERR("Downloading firmware failed!");
 985                 ret = -ENODEV;
 986                 goto unreg_dev;
 987         }
 988
 989         msleep(100);
 990
 991         btmrvl_sdio_enable_host_int(card);
 992
 993         priv = btmrvl_add_card(card);
 994         if (!priv) {
 995                 BT_ERR("Initializing card failed!");
 996                 ret = -ENODEV;
 997                 goto disable_host_int;
 998         }
 999
1000         card->priv = priv;
1001
1002         /* Initialize the interface specific function pointers */
1003         priv->hw_host_to_card = btmrvl_sdio_host_to_card;
1004         priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
1005         priv->hw_process_int_status = btmrvl_sdio_process_int_status;
1006
1007         if (btmrvl_register_hdev(priv)) {
1008                 BT_ERR("Register hdev failed!");
1009                 ret = -ENODEV;
1010                 goto disable_host_int;
1011         }
1012
1013         priv->btmrvl_dev.psmode = 1;
1014         btmrvl_enable_ps(priv);
1015
1016         return 0;
1017
1018 disable_host_int:
1019         btmrvl_sdio_disable_host_int(card);
1020 unreg_dev:
1021         btmrvl_sdio_unregister_dev(card);
1022 free_card:
1023         kfree(card);
1024 done:
1025         return ret;
1026 }
1027
1028 static void btmrvl_sdio_remove(struct sdio_func *func)
1029 {
1030         struct btmrvl_sdio_card *card;
1031
1032         if (func) {
1033                 card = sdio_get_drvdata(func);
1034                 if (card) {
1035                         /* Send SHUTDOWN command & disable interrupt
1036                          * if user removes the module.
1037                          */
1038                         if (user_rmmod) {
1039                                 btmrvl_send_module_cfg_cmd(card->priv,
1040                                                         MODULE_SHUTDOWN_REQ);
1041                                 btmrvl_sdio_disable_host_int(card);
1042                         }
1043                         BT_DBG("unregester dev");
1044                         btmrvl_sdio_unregister_dev(card);
1045                         btmrvl_remove_card(card->priv);
1046                         kfree(card);
1047                 }
1048         }
1049 }
1050
1051 static struct sdio_driver bt_mrvl_sdio = {
1052         .name           = "btmrvl_sdio",
1053         .id_table       = btmrvl_sdio_ids,
1054         .probe          = btmrvl_sdio_probe,
1055         .remove         = btmrvl_sdio_remove,
1056 };
1057
1058 static int __init btmrvl_sdio_init_module(void)
1059 {
1060         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1061                 BT_ERR("SDIO Driver Registration Failed");
1062                 return -ENODEV;
1063         }
1064
1065         /* Clear the flag in case user removes the card. */
1066         user_rmmod = 0;
1067
1068         return 0;
1069 }
1070
1071 static void __exit btmrvl_sdio_exit_module(void)
1072 {
1073         /* Set the flag as user is removing this module. */
1074         user_rmmod = 1;
1075
1076         sdio_unregister_driver(&bt_mrvl_sdio);
1077 }
1078
1079 module_init(btmrvl_sdio_init_module);
1080 module_exit(btmrvl_sdio_exit_module);
1081
1082 MODULE_AUTHOR("Marvell International Ltd.");
1083 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1084 MODULE_VERSION(VERSION);
1085 MODULE_LICENSE("GPL v2");
1086 MODULE_FIRMWARE("sd8688_helper.bin");
1087 MODULE_FIRMWARE("sd8688.bin");
1088 MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
1089 MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");