drivers/staging/btmtk_usb/btmtk_usb.c

   1 /*
   2  *  MediaTek Bluetooth USB Driver
   3  *
   4  *  Copyright (C) 2013, MediaTek co.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *  or on the worldwide web at
  20  *  http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  21  *
  22  */
  23
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/types.h>
  29 #include <linux/sched.h>
  30 #include <linux/errno.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/completion.h>
  33 #include <linux/firmware.h>
  34 #include <linux/usb.h>
  35 #include <net/bluetooth/bluetooth.h>
  36 #include <net/bluetooth/hci_core.h>
  37
  38 #include "btmtk_usb.h"
  39
  40 #define VERSION "1.0.4"
  41 #define MT7650_FIRMWARE "mt7650.bin"
  42 #define MT7662_FIRMWARE "mt7662.bin"
  43
  44 static struct usb_driver btmtk_usb_driver;
  45
  46
  47 static int btmtk_usb_load_rom_patch(struct btmtk_usb_data *);
  48 static int btmtk_usb_load_fw(struct btmtk_usb_data *);
  49
  50 static void hex_dump(char *str, u8 *src_buf, u32 src_buf_len)
  51 {
  52         unsigned char *pt;
  53         int x;
  54
  55         pt = src_buf;
  56
  57         BT_DBG("%s: %p, len = %d\n", str, src_buf, src_buf_len);
  58
  59         for (x = 0; x < src_buf_len; x++) {
  60                 if (x % 16 == 0)
  61                         BT_DBG("0x%04x : ", x);
  62                 BT_DBG("%02x ", ((unsigned char)pt[x]));
  63                 if (x % 16 == 15)
  64                         BT_DBG("\n");
  65         }
  66
  67         BT_DBG("\n");
  68 }
  69
  70 static int btmtk_usb_reset(struct usb_device *udev)
  71 {
  72         int ret;
  73
  74         BT_DBG("%s\n", __func__);
  75
  76         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
  77                         DEVICE_VENDOR_REQUEST_OUT, 0x01, 0x00,
  78                         NULL, 0x00, CONTROL_TIMEOUT_JIFFIES);
  79
  80         if (ret < 0) {
  81                 BT_ERR("%s error(%d)\n", __func__, ret);
  82                 return ret;
  83         }
  84
  85         if (ret > 0)
  86                 ret = 0;
  87
  88         return ret;
  89 }
  90
  91 static int btmtk_usb_io_read32(struct btmtk_usb_data *data, u32 reg, u32 *val)
  92 {
  93         u8 request = data->r_request;
  94         struct usb_device *udev = data->udev;
  95         int ret;
  96         __le32 val_le;
  97
  98         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), request,
  99                         DEVICE_VENDOR_REQUEST_IN, 0x0, reg, data->io_buf,
 100                         4, CONTROL_TIMEOUT_JIFFIES);
 101
 102         if (ret < 0) {
 103                 *val = 0xffffffff;
 104                 BT_ERR("%s error(%d), reg=%x, value=%x\n",
 105                                 __func__, ret, reg, *val);
 106                 return ret;
 107         }
 108
 109         memmove(&val_le, data->io_buf, 4);
 110
 111         *val = le32_to_cpu(val_le);
 112
 113         if (ret > 0)
 114                 ret = 0;
 115
 116         return ret;
 117 }
 118
 119 static int btmtk_usb_io_write32(struct btmtk_usb_data *data, u32 reg, u32 val)
 120 {
 121         u16 value, index;
 122         u8 request = data->w_request;
 123         struct usb_device *udev = data->udev;
 124         int ret;
 125
 126         index = (u16)reg;
 127         value = val & 0x0000ffff;
 128
 129         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), request,
 130                         DEVICE_VENDOR_REQUEST_OUT, value, index,
 131                         NULL, 0, CONTROL_TIMEOUT_JIFFIES);
 132
 133         if (ret < 0) {
 134                 BT_ERR("%s error(%d), reg=%x, value=%x\n",
 135                                 __func__, ret, reg, val);
 136                 return ret;
 137         }
 138
 139         index = (u16)(reg + 2);
 140         value = (val & 0xffff0000) >> 16;
 141
 142         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 143                                 request, DEVICE_VENDOR_REQUEST_OUT,
 144                                 value, index, NULL, 0, CONTROL_TIMEOUT_JIFFIES);
 145
 146         if (ret < 0) {
 147                 BT_ERR("%s error(%d), reg=%x, value=%x\n",
 148                                 __func__, ret, reg, val);
 149                 return ret;
 150         }
 151
 152         if (ret > 0)
 153                 ret = 0;
 154
 155         return ret;
 156 }
 157
 158 static int btmtk_usb_switch_iobase(struct btmtk_usb_data *data, int base)
 159 {
 160         int ret = 0;
 161
 162         switch (base) {
 163         case SYSCTL:
 164                 data->w_request = 0x42;
 165                 data->r_request = 0x47;
 166                 break;
 167         case WLAN:
 168                 data->w_request = 0x02;
 169                 data->r_request = 0x07;
 170                 break;
 171
 172         default:
 173                 return -EINVAL;
 174         }
 175
 176         return ret;
 177 }
 178
 179 static void btmtk_usb_cap_init(struct btmtk_usb_data *data)
 180 {
 181         const struct firmware   *firmware;
 182         struct usb_device   *udev = data->udev;
 183         int ret;
 184
 185         btmtk_usb_io_read32(data, 0x00, &data->chip_id);
 186
 187         BT_DBG("chip id = %x\n", data->chip_id);
 188
 189         if (is_mt7630(data) || is_mt7650(data)) {
 190                 data->need_load_fw = 1;
 191                 data->need_load_rom_patch = 0;
 192                 ret = request_firmware(&firmware, MT7650_FIRMWARE, &udev->dev);
 193                 if (ret < 0) {
 194                         if (ret == -ENOENT) {
 195                                 BT_ERR("Firmware file \"%s\" not found\n",
 196                                                 MT7650_FIRMWARE);
 197                         } else {
 198                                 BT_ERR("Firmware file \"%s\" request failed (err=%d)\n",
 199                                         MT7650_FIRMWARE, ret);
 200                         }
 201                 } else {
 202                         BT_DBG("Firmware file \"%s\" Found\n",
 203                                         MT7650_FIRMWARE);
 204                         /* load firmware here */
 205                         data->firmware = firmware;
 206                         btmtk_usb_load_fw(data);
 207                 }
 208                 release_firmware(firmware);
 209         } else if (is_mt7632(data) || is_mt7662(data)) {
 210                 data->need_load_fw = 0;
 211                 data->need_load_rom_patch = 1;
 212                 data->rom_patch_offset = 0x90000;
 213                 ret = request_firmware(&firmware, MT7662_FIRMWARE, &udev->dev);
 214                 if (ret < 0) {
 215                         if (ret == -ENOENT) {
 216                                 BT_ERR("Firmware file \"%s\" not found\n",
 217                                                 MT7662_FIRMWARE);
 218                         } else {
 219                                 BT_ERR("Firmware file \"%s\" request failed (err=%d)\n",
 220                                         MT7662_FIRMWARE, ret);
 221                         }
 222                 } else {
 223                     BT_DBG("Firmware file \"%s\" Found\n", MT7662_FIRMWARE);
 224                     /* load rom patch here */
 225                     data->firmware = firmware;
 226                     data->rom_patch_len = firmware->size;
 227                     btmtk_usb_load_rom_patch(data);
 228                 }
 229                 release_firmware(firmware);
 230         } else {
 231                 BT_ERR("unknow chip(%x)\n", data->chip_id);
 232         }
 233 }
 234
 235 static u16 checksume16(u8 *pData, int len)
 236 {
 237         int sum = 0;
 238
 239         while (len > 1) {
 240                 sum += *((u16 *)pData);
 241
 242                 pData = pData + 2;
 243
 244                 if (sum & 0x80000000)
 245                         sum = (sum & 0xFFFF) + (sum >> 16);
 246
 247                 len -= 2;
 248         }
 249
 250         if (len)
 251                 sum += *((u8 *)pData);
 252
 253         while (sum >> 16)
 254                 sum = (sum & 0xFFFF) + (sum >> 16);
 255
 256         return ~sum;
 257 }
 258
 259 static int btmtk_usb_chk_crc(struct btmtk_usb_data *data, u32 checksum_len)
 260 {
 261         int ret = 0;
 262         struct usb_device *udev = data->udev;
 263
 264         BT_DBG("%s\n", __func__);
 265
 266         memmove(data->io_buf, &data->rom_patch_offset, 4);
 267         memmove(&data->io_buf[4], &checksum_len, 4);
 268
 269         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x1,
 270                         DEVICE_VENDOR_REQUEST_IN, 0x20, 0x00, data->io_buf,
 271                         8, CONTROL_TIMEOUT_JIFFIES);
 272
 273         if (ret < 0)
 274                 BT_ERR("%s error(%d)\n", __func__, ret);
 275
 276         return ret;
 277 }
 278
 279 static u16 btmtk_usb_get_crc(struct btmtk_usb_data *data)
 280 {
 281         int ret = 0;
 282         struct usb_device *udev = data->udev;
 283         u16 crc, count = 0;
 284         __le16 crc_le;
 285
 286         BT_DBG("%s\n", __func__);
 287
 288         while (1) {
 289                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 290                                         0x01, DEVICE_VENDOR_REQUEST_IN,
 291                                         0x21, 0x00, data->io_buf, 2,
 292                                         CONTROL_TIMEOUT_JIFFIES);
 293
 294                 if (ret < 0) {
 295                         crc = 0xFFFF;
 296                         BT_ERR("%s error(%d)\n", __func__, ret);
 297                 }
 298
 299                 memmove(&crc_le, data->io_buf, 2);
 300
 301                 crc = le16_to_cpu(crc_le);
 302
 303                 if (crc != 0xFFFF)
 304                         break;
 305
 306                 mdelay(100);
 307
 308                 if (count++ > 100) {
 309                         BT_ERR("Query CRC over %d times\n", count);
 310                         break;
 311                 }
 312         }
 313
 314         return crc;
 315 }
 316
 317 static int btmtk_usb_reset_wmt(struct btmtk_usb_data *data)
 318 {
 319         int ret = 0;
 320
 321         /* reset command */
 322         u8 cmd[8] = {0x6F, 0xFC, 0x05, 0x01, 0x07, 0x01, 0x00, 0x04};
 323
 324         memmove(data->io_buf, cmd, 8);
 325
 326         BT_DBG("%s\n", __func__);
 327
 328         ret = usb_control_msg(data->udev, usb_sndctrlpipe(data->udev, 0), 0x01,
 329                                 DEVICE_CLASS_REQUEST_OUT, 0x12, 0x00,
 330                                 data->io_buf, 8, CONTROL_TIMEOUT_JIFFIES);
 331
 332         if (ret)
 333                 BT_ERR("%s:(%d)\n", __func__, ret);
 334
 335         return ret;
 336 }
 337
 338 static void load_rom_patch_complete(struct urb *urb)
 339 {
 340
 341         struct completion *sent_to_mcu_done = (struct completion *)urb->context;
 342
 343         complete(sent_to_mcu_done);
 344 }
 345
 346 static int btmtk_usb_load_rom_patch(struct btmtk_usb_data *data)
 347 {
 348         u32 loop = 0;
 349         u32 value;
 350         s32 sent_len;
 351         int ret = 0, total_checksum = 0;
 352         struct urb *urb;
 353         u32 patch_len = 0;
 354         u32 cur_len = 0;
 355         dma_addr_t data_dma;
 356         struct completion sent_to_mcu_done;
 357         int first_block = 1;
 358         unsigned char phase;
 359         void *buf;
 360         char *pos;
 361         unsigned int pipe;
 362         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
 363
 364         if (!data->firmware) {
 365                 BT_ERR("%s:please assign a rom patch\n", __func__);
 366                 return -1;
 367         }
 368
 369 load_patch_protect:
 370         btmtk_usb_switch_iobase(data, WLAN);
 371         btmtk_usb_io_read32(data, SEMAPHORE_03, &value);
 372         loop++;
 373
 374         if (((value & 0x01) == 0x00) && (loop < 600)) {
 375                 mdelay(1);
 376                 goto load_patch_protect;
 377         }
 378
 379         btmtk_usb_io_write32(data, 0x1004, 0x2c);
 380
 381         btmtk_usb_switch_iobase(data, SYSCTL);
 382
 383         btmtk_usb_io_write32(data, 0x1c, 0x30);
 384
 385         /* Enable USB_DMA_CFG */
 386         btmtk_usb_io_write32(data, 0x9018, 0x00c00020);
 387
 388         btmtk_usb_switch_iobase(data, WLAN);
 389
 390         /* check ROM patch if upgrade */
 391         btmtk_usb_io_read32(data, COM_REG0, &value);
 392
 393         if ((value & 0x02) == 0x02)
 394                 goto error0;
 395
 396         urb = usb_alloc_urb(0, GFP_ATOMIC);
 397
 398         if (!urb) {
 399                 ret = -ENOMEM;
 400                 goto error0;
 401         }
 402
 403         buf = usb_alloc_coherent(data->udev, UPLOAD_PATCH_UNIT,
 404                         GFP_ATOMIC, &data_dma);
 405
 406         if (!buf) {
 407                 ret = -ENOMEM;
 408                 goto error1;
 409         }
 410
 411         pos = buf;
 412         BT_DBG("loading rom patch");
 413
 414         init_completion(&sent_to_mcu_done);
 415
 416         cur_len = 0x00;
 417         patch_len = data->rom_patch_len - PATCH_INFO_SIZE;
 418
 419         /* loading rom patch */
 420         while (1) {
 421                 s32 sent_len_max = UPLOAD_PATCH_UNIT - PATCH_HEADER_SIZE;
 422                 sent_len = min_t(s32, (patch_len - cur_len), sent_len_max);
 423
 424                 BT_DBG("patch_len = %d\n", patch_len);
 425                 BT_DBG("cur_len = %d\n", cur_len);
 426                 BT_DBG("sent_len = %d\n", sent_len);
 427
 428                 if (sent_len <= 0)
 429                         break;
 430
 431                 if (first_block == 1) {
 432                         if (sent_len < sent_len_max)
 433                                 phase = PATCH_PHASE3;
 434                         else
 435                                 phase = PATCH_PHASE1;
 436                         first_block = 0;
 437                 } else if (sent_len == sent_len_max) {
 438                         phase = PATCH_PHASE2;
 439                 } else {
 440                         phase = PATCH_PHASE3;
 441                 }
 442
 443                 /* prepare HCI header */
 444                 pos[0] = 0x6F;
 445                 pos[1] = 0xFC;
 446                 pos[2] = (sent_len + 5) & 0xFF;
 447                 pos[3] = ((sent_len + 5) >> 8) & 0xFF;
 448
 449                 /* prepare WMT header */
 450                 pos[4] = 0x01;
 451                 pos[5] = 0x01;
 452                 pos[6] = (sent_len + 1) & 0xFF;
 453                 pos[7] = ((sent_len + 1) >> 8) & 0xFF;
 454
 455                 pos[8] = phase;
 456
 457                 memcpy(&pos[9],
 458                         data->firmware->data + PATCH_INFO_SIZE + cur_len,
 459                         sent_len);
 460
 461                 BT_DBG("sent_len + PATCH_HEADER_SIZE = %d, phase = %d\n",
 462                                 sent_len + PATCH_HEADER_SIZE, phase);
 463
 464                 usb_fill_bulk_urb(urb,
 465                                 data->udev,
 466                                 pipe,
 467                                 buf,
 468                                 sent_len + PATCH_HEADER_SIZE,
 469                                 load_rom_patch_complete,
 470                                 &sent_to_mcu_done);
 471
 472                 urb->transfer_dma = data_dma;
 473                 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 474
 475                 ret = usb_submit_urb(urb, GFP_ATOMIC);
 476
 477                 if (ret)
 478                         goto error2;
 479
 480                 if (!wait_for_completion_timeout(&sent_to_mcu_done,
 481                                         msecs_to_jiffies(1000))) {
 482                         usb_kill_urb(urb);
 483                         BT_ERR("upload rom_patch timeout\n");
 484                         goto error2;
 485                 }
 486
 487                 BT_DBG(".");
 488
 489                 mdelay(200);
 490
 491                 cur_len += sent_len;
 492
 493         }
 494
 495         total_checksum = checksume16(
 496                         (u8 *)data->firmware->data + PATCH_INFO_SIZE,
 497                         patch_len);
 498
 499         BT_DBG("Send checksum req..\n");
 500
 501         btmtk_usb_chk_crc(data, patch_len);
 502
 503         mdelay(20);
 504
 505         if (total_checksum != btmtk_usb_get_crc(data)) {
 506                 BT_ERR("checksum fail!, local(0x%x) <> fw(0x%x)\n",
 507                                 total_checksum, btmtk_usb_get_crc(data));
 508                 ret = -1;
 509                 goto error2;
 510         }
 511
 512         mdelay(20);
 513
 514         ret = btmtk_usb_reset_wmt(data);
 515
 516         mdelay(20);
 517
 518 error2:
 519         usb_free_coherent(data->udev, UPLOAD_PATCH_UNIT, buf, data_dma);
 520 error1:
 521         usb_free_urb(urb);
 522 error0:
 523         btmtk_usb_io_write32(data, SEMAPHORE_03, 0x1);
 524         return ret;
 525 }
 526
 527
 528 static int load_fw_iv(struct btmtk_usb_data *data)
 529 {
 530         int ret;
 531         struct usb_device *udev = data->udev;
 532         char *buf = kmalloc(64, GFP_ATOMIC);
 533
 534         memmove(buf, data->firmware->data + 32, 64);
 535
 536         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
 537                         DEVICE_VENDOR_REQUEST_OUT, 0x12, 0x0, buf, 64,
 538                         CONTROL_TIMEOUT_JIFFIES);
 539
 540         if (ret < 0) {
 541                 BT_ERR("%s error(%d) step4\n", __func__, ret);
 542                 kfree(buf);
 543                 return ret;
 544         }
 545
 546         if (ret > 0)
 547                 ret = 0;
 548
 549         kfree(buf);
 550
 551         return ret;
 552 }
 553
 554 static void load_fw_complete(struct urb *urb)
 555 {
 556
 557         struct completion *sent_to_mcu_done = (struct completion *)urb->context;
 558
 559         complete(sent_to_mcu_done);
 560 }
 561
 562 static int btmtk_usb_load_fw(struct btmtk_usb_data *data)
 563 {
 564         struct usb_device *udev = data->udev;
 565         struct urb *urb;
 566         void *buf;
 567         u32 cur_len = 0;
 568         u32 packet_header = 0;
 569         __le32 packet_header_le;
 570         u32 value;
 571         u32 ilm_len = 0, dlm_len = 0;
 572         u16 fw_ver, build_ver;
 573         u32 loop = 0;
 574         dma_addr_t data_dma;
 575         int ret = 0, sent_len;
 576         struct completion sent_to_mcu_done;
 577         unsigned int pipe;
 578         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
 579
 580         if (!data->firmware) {
 581                 BT_ERR("%s:please assign a fw\n", __func__);
 582                 return -1;
 583         }
 584
 585         BT_DBG("bulk_tx_ep = %x\n", data->bulk_tx_ep->bEndpointAddress);
 586
 587 loadfw_protect:
 588         btmtk_usb_switch_iobase(data, WLAN);
 589         btmtk_usb_io_read32(data, SEMAPHORE_00, &value);
 590         loop++;
 591
 592         if (((value & 0x1) == 0) && (loop < 10000))
 593                 goto loadfw_protect;
 594
 595         /* check MCU if ready */
 596         btmtk_usb_io_read32(data, COM_REG0, &value);
 597
 598         if ((value & 0x01) == 0x01)
 599                 goto error0;
 600
 601         /* Enable MPDMA TX and EP2 load FW mode */
 602         btmtk_usb_io_write32(data, 0x238, 0x1c000000);
 603
 604         btmtk_usb_reset(udev);
 605         mdelay(100);
 606
 607         ilm_len = (*(data->firmware->data + 3) << 24)
 608                         | (*(data->firmware->data + 2) << 16)
 609                         | (*(data->firmware->data + 1) << 8)
 610                         | (*data->firmware->data);
 611
 612         dlm_len = (*(data->firmware->data + 7) << 24)
 613                         | (*(data->firmware->data + 6) << 16)
 614                         | (*(data->firmware->data + 5) << 8)
 615                         | (*(data->firmware->data + 4));
 616
 617         fw_ver = (*(data->firmware->data + 11) << 8) |
 618               (*(data->firmware->data + 10));
 619
 620         build_ver = (*(data->firmware->data + 9) << 8) |
 621                  (*(data->firmware->data + 8));
 622
 623         BT_DBG("fw version:%d.%d.%02d ",
 624                         (fw_ver & 0xf000) >> 8,
 625                         (fw_ver & 0x0f00) >> 8,
 626                         (fw_ver & 0x00ff));
 627
 628         BT_DBG("build:%x\n", build_ver);
 629
 630         BT_DBG("build Time =");
 631
 632         for (loop = 0; loop < 16; loop++)
 633                 BT_DBG("%c", *(data->firmware->data + 16 + loop));
 634
 635         BT_DBG("\n");
 636
 637         BT_DBG("ILM length = %d(bytes)\n", ilm_len);
 638         BT_DBG("DLM length = %d(bytes)\n", dlm_len);
 639
 640         btmtk_usb_switch_iobase(data, SYSCTL);
 641
 642         /* U2M_PDMA rx_ring_base_ptr */
 643         btmtk_usb_io_write32(data, 0x790, 0x400230);
 644
 645         /* U2M_PDMA rx_ring_max_cnt */
 646         btmtk_usb_io_write32(data, 0x794, 0x1);
 647
 648         /* U2M_PDMA cpu_idx */
 649         btmtk_usb_io_write32(data, 0x798, 0x1);
 650
 651         /* U2M_PDMA enable */
 652         btmtk_usb_io_write32(data, 0x704, 0x44);
 653
 654         urb = usb_alloc_urb(0, GFP_ATOMIC);
 655
 656         if (!urb) {
 657                 ret = -ENOMEM;
 658                 goto error1;
 659         }
 660
 661         buf = usb_alloc_coherent(udev, 14592, GFP_ATOMIC, &data_dma);
 662
 663         if (!buf) {
 664                 ret = -ENOMEM;
 665                 goto error2;
 666         }
 667
 668         BT_DBG("loading fw");
 669
 670         init_completion(&sent_to_mcu_done);
 671
 672         btmtk_usb_switch_iobase(data, SYSCTL);
 673
 674         cur_len = 0x40;
 675
 676         /* Loading ILM */
 677         while (1) {
 678                 sent_len = min_t(s32, (ilm_len - cur_len), 14336);
 679
 680                 if (sent_len > 0) {
 681                         packet_header &= ~(0xffffffff);
 682                         packet_header |= (sent_len << 16);
 683                         packet_header_le = cpu_to_le32(packet_header);
 684
 685                         memmove(buf, &packet_header_le, 4);
 686                         memmove(buf + 4, data->firmware->data + 32 + cur_len,
 687                                         sent_len);
 688
 689                         /* U2M_PDMA descriptor */
 690                         btmtk_usb_io_write32(data, 0x230, cur_len);
 691
 692                         while ((sent_len % 4) != 0)
 693                                 sent_len++;
 694
 695                         /* U2M_PDMA length */
 696                         btmtk_usb_io_write32(data, 0x234, sent_len << 16);
 697
 698                         usb_fill_bulk_urb(urb,
 699                                         udev,
 700                                         pipe,
 701                                         buf,
 702                                         sent_len + 4,
 703                                         load_fw_complete,
 704                                         &sent_to_mcu_done);
 705
 706                         urb->transfer_dma = data_dma;
 707                         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 708
 709                         ret = usb_submit_urb(urb, GFP_ATOMIC);
 710
 711                         if (ret)
 712                                 goto error3;
 713
 714                         if (!wait_for_completion_timeout(&sent_to_mcu_done,
 715                                                 msecs_to_jiffies(1000))) {
 716                                 usb_kill_urb(urb);
 717                                 BT_ERR("upload ilm fw timeout\n");
 718                                 goto error3;
 719                         }
 720
 721                         BT_DBG(".");
 722
 723                         mdelay(200);
 724
 725                         cur_len += sent_len;
 726                 } else {
 727                         break;
 728                 }
 729         }
 730
 731         init_completion(&sent_to_mcu_done);
 732         cur_len = 0x00;
 733
 734         /* Loading DLM */
 735         while (1) {
 736                 sent_len = min_t(s32, (dlm_len - cur_len), 14336);
 737
 738                 if (sent_len <= 0)
 739                         break;
 740
 741                 packet_header &= ~(0xffffffff);
 742                 packet_header |= (sent_len << 16);
 743                 packet_header_le = cpu_to_le32(packet_header);
 744
 745                 memmove(buf, &packet_header_le, 4);
 746                 memmove(buf + 4,
 747                         data->firmware->data + 32 + ilm_len + cur_len,
 748                         sent_len);
 749
 750                 /* U2M_PDMA descriptor */
 751                 btmtk_usb_io_write32(data, 0x230, 0x80000 + cur_len);
 752
 753                 while ((sent_len % 4) != 0) {
 754                         BT_DBG("sent_len is not divided by 4\n");
 755                         sent_len++;
 756                 }
 757
 758                 /* U2M_PDMA length */
 759                 btmtk_usb_io_write32(data, 0x234, sent_len << 16);
 760
 761                 usb_fill_bulk_urb(urb,
 762                                 udev,
 763                                 pipe,
 764                                 buf,
 765                                 sent_len + 4,
 766                                 load_fw_complete,
 767                                 &sent_to_mcu_done);
 768
 769                 urb->transfer_dma = data_dma;
 770                 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 771
 772                 ret = usb_submit_urb(urb, GFP_ATOMIC);
 773
 774                 if (ret)
 775                         goto error3;
 776
 777                 if (!wait_for_completion_timeout(&sent_to_mcu_done,
 778                                         msecs_to_jiffies(1000))) {
 779                         usb_kill_urb(urb);
 780                         BT_ERR("upload dlm fw timeout\n");
 781                         goto error3;
 782                 }
 783
 784                 BT_DBG(".");
 785
 786                 mdelay(500);
 787
 788                 cur_len += sent_len;
 789
 790         }
 791
 792         /* upload 64bytes interrupt vector */
 793         ret = load_fw_iv(data);
 794         mdelay(100);
 795
 796         btmtk_usb_switch_iobase(data, WLAN);
 797
 798         /* check MCU if ready */
 799         loop = 0;
 800
 801         do {
 802                 btmtk_usb_io_read32(data, COM_REG0, &value);
 803
 804                 if (value == 0x01)
 805                         break;
 806
 807                 mdelay(10);
 808                 loop++;
 809         } while (loop <= 100);
 810
 811         if (loop > 1000) {
 812                 BT_ERR("wait for 100 times\n");
 813                 ret = -ENODEV;
 814         }
 815
 816 error3:
 817         usb_free_coherent(udev, 14592, buf, data_dma);
 818 error2:
 819         usb_free_urb(urb);
 820 error1:
 821         /* Disbale load fw mode */
 822         btmtk_usb_io_read32(data, 0x238, &value);
 823         value = value & ~(0x10000000);
 824         btmtk_usb_io_write32(data,  0x238, value);
 825 error0:
 826         btmtk_usb_io_write32(data, SEMAPHORE_00, 0x1);
 827         return ret;
 828 }
 829
 830 static int inc_tx(struct btmtk_usb_data *data)
 831 {
 832         unsigned long flags;
 833         int rv;
 834
 835         spin_lock_irqsave(&data->txlock, flags);
 836         rv = test_bit(BTUSB_SUSPENDING, &data->flags);
 837         if (!rv)
 838                 data->tx_in_flight++;
 839         spin_unlock_irqrestore(&data->txlock, flags);
 840
 841         return rv;
 842 }
 843
 844 static void btmtk_usb_intr_complete(struct urb *urb)
 845 {
 846         struct hci_dev *hdev = urb->context;
 847         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
 848         int err;
 849
 850         BT_DBG("%s: %s urb %p status %d count %d\n", __func__, hdev->name,
 851                                         urb, urb->status, urb->actual_length);
 852
 853         if (!test_bit(HCI_RUNNING, &hdev->flags))
 854                 return;
 855
 856         if (urb->status == 0) {
 857                 hdev->stat.byte_rx += urb->actual_length;
 858
 859                 hex_dump("hci event", urb->transfer_buffer, urb->actual_length);
 860
 861                 if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
 862                                                 urb->transfer_buffer,
 863                                                 urb->actual_length) < 0) {
 864                         BT_ERR("%s corrupted event packet", hdev->name);
 865                         hdev->stat.err_rx++;
 866                 }
 867         }
 868
 869         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 870                 return;
 871
 872         usb_mark_last_busy(data->udev);
 873         usb_anchor_urb(urb, &data->intr_anchor);
 874
 875         err = usb_submit_urb(urb, GFP_ATOMIC);
 876
 877         if (err < 0) {
 878                 /* -EPERM: urb is being killed;
 879                  * -ENODEV: device got disconnected */
 880                 if (err != -EPERM && err != -ENODEV)
 881                         BT_ERR("%s urb %p failed to resubmit (%d)",
 882                                                 hdev->name, urb, -err);
 883                 usb_unanchor_urb(urb);
 884         }
 885 }
 886
 887 static int btmtk_usb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 888 {
 889         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
 890         struct urb *urb;
 891         unsigned char *buf;
 892         unsigned int pipe;
 893         int err, size;
 894
 895         BT_DBG("%s\n", __func__);
 896
 897         if (!data->intr_ep)
 898                 return -ENODEV;
 899
 900         urb = usb_alloc_urb(0, mem_flags);
 901         if (!urb)
 902                 return -ENOMEM;
 903
 904         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
 905
 906         buf = kmalloc(size, mem_flags);
 907         if (!buf) {
 908                 usb_free_urb(urb);
 909                 return -ENOMEM;
 910         }
 911
 912         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
 913
 914         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 915                                                 btmtk_usb_intr_complete, hdev,
 916                                                 data->intr_ep->bInterval);
 917
 918         urb->transfer_flags |= URB_FREE_BUFFER;
 919
 920         usb_anchor_urb(urb, &data->intr_anchor);
 921
 922         err = usb_submit_urb(urb, mem_flags);
 923         if (err < 0) {
 924                 if (err != -EPERM && err != -ENODEV)
 925                         BT_ERR("%s urb %p submission failed (%d)",
 926                                                 hdev->name, urb, -err);
 927                 usb_unanchor_urb(urb);
 928         }
 929
 930         usb_free_urb(urb);
 931
 932         return err;
 933
 934 }
 935
 936 static void btmtk_usb_bulk_in_complete(struct urb *urb)
 937 {
 938         struct hci_dev *hdev = urb->context;
 939         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
 940         int err;
 941
 942         BT_DBG("%s:%s urb %p status %d count %d", __func__, hdev->name,
 943                                         urb, urb->status, urb->actual_length);
 944
 945         if (!test_bit(HCI_RUNNING, &hdev->flags))
 946                 return;
 947
 948         if (urb->status == 0) {
 949                 hdev->stat.byte_rx += urb->actual_length;
 950
 951                 if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
 952                                                 urb->transfer_buffer,
 953                                                 urb->actual_length) < 0) {
 954                         BT_ERR("%s corrupted ACL packet", hdev->name);
 955                         hdev->stat.err_rx++;
 956                 }
 957         }
 958
 959         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
 960                 return;
 961
 962         usb_anchor_urb(urb, &data->bulk_anchor);
 963         usb_mark_last_busy(data->udev);
 964
 965         err = usb_submit_urb(urb, GFP_ATOMIC);
 966         if (err < 0) {
 967                 /* -EPERM: urb is being killed;
 968                  * -ENODEV: device got disconnected */
 969                 if (err != -EPERM && err != -ENODEV)
 970                         BT_ERR("%s urb %p failed to resubmit (%d)",
 971                                                 hdev->name, urb, -err);
 972                 usb_unanchor_urb(urb);
 973         }
 974 }
 975
 976 static int btmtk_usb_submit_bulk_in_urb(struct hci_dev *hdev, gfp_t mem_flags)
 977 {
 978         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
 979         struct urb *urb;
 980         unsigned char *buf;
 981         unsigned int pipe;
 982         int err, size = HCI_MAX_FRAME_SIZE;
 983
 984         BT_DBG("%s:%s\n", __func__, hdev->name);
 985
 986         if (!data->bulk_rx_ep)
 987                 return -ENODEV;
 988
 989         urb = usb_alloc_urb(0, mem_flags);
 990         if (!urb)
 991                 return -ENOMEM;
 992
 993         buf = kmalloc(size, mem_flags);
 994         if (!buf) {
 995                 usb_free_urb(urb);
 996                 return -ENOMEM;
 997         }
 998
 999         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
1000
1001         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
1002                         btmtk_usb_bulk_in_complete, hdev);
1003
1004         urb->transfer_flags |= URB_FREE_BUFFER;
1005
1006         usb_mark_last_busy(data->udev);
1007         usb_anchor_urb(urb, &data->bulk_anchor);
1008
1009         err = usb_submit_urb(urb, mem_flags);
1010         if (err < 0) {
1011                 if (err != -EPERM && err != -ENODEV)
1012                         BT_ERR("%s urb %p submission failed (%d)",
1013                                                 hdev->name, urb, -err);
1014                 usb_unanchor_urb(urb);
1015         }
1016
1017         usb_free_urb(urb);
1018
1019         return err;
1020 }
1021
1022 static void btmtk_usb_isoc_in_complete(struct urb *urb)
1023
1024 {
1025         struct hci_dev *hdev = urb->context;
1026         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1027         int i, err;
1028
1029         BT_DBG("%s: %s urb %p status %d count %d", __func__, hdev->name,
1030                                         urb, urb->status, urb->actual_length);
1031
1032         if (!test_bit(HCI_RUNNING, &hdev->flags))
1033                 return;
1034
1035         if (urb->status == 0) {
1036                 for (i = 0; i < urb->number_of_packets; i++) {
1037                         unsigned int offset = urb->iso_frame_desc[i].offset;
1038                         unsigned int length;
1039                         length = urb->iso_frame_desc[i].actual_length;
1040
1041                         if (urb->iso_frame_desc[i].status)
1042                                 continue;
1043
1044                         hdev->stat.byte_rx += length;
1045
1046                         if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
1047                                                 urb->transfer_buffer + offset,
1048                                                                 length) < 0) {
1049                                 BT_ERR("%s corrupted SCO packet", hdev->name);
1050                                 hdev->stat.err_rx++;
1051                         }
1052                 }
1053         }
1054
1055         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
1056                 return;
1057
1058         usb_anchor_urb(urb, &data->isoc_anchor);
1059
1060         err = usb_submit_urb(urb, GFP_ATOMIC);
1061         if (err < 0) {
1062                 /* -EPERM: urb is being killed;
1063                  * -ENODEV: device got disconnected */
1064                 if (err != -EPERM && err != -ENODEV)
1065                         BT_ERR("%s urb %p failed to resubmit (%d)",
1066                                                 hdev->name, urb, -err);
1067                 usb_unanchor_urb(urb);
1068         }
1069 }
1070
1071 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
1072 {
1073         int i, offset = 0;
1074
1075         BT_DBG("len %d mtu %d", len, mtu);
1076
1077         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
1078                                         i++, offset += mtu, len -= mtu) {
1079                 urb->iso_frame_desc[i].offset = offset;
1080                 urb->iso_frame_desc[i].length = mtu;
1081         }
1082
1083         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
1084                 urb->iso_frame_desc[i].offset = offset;
1085                 urb->iso_frame_desc[i].length = len;
1086                 i++;
1087         }
1088
1089         urb->number_of_packets = i;
1090 }
1091
1092 static int btmtk_usb_submit_isoc_in_urb(struct hci_dev *hdev, gfp_t mem_flags)
1093 {
1094         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1095         struct urb *urb;
1096         unsigned char *buf;
1097         unsigned int pipe;
1098         int err, size;
1099
1100         BT_DBG("%s\n", __func__);
1101
1102         if (!data->isoc_rx_ep)
1103                 return -ENODEV;
1104
1105         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
1106         if (!urb)
1107                 return -ENOMEM;
1108
1109         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
1110                                                 BTUSB_MAX_ISOC_FRAMES;
1111
1112         buf = kmalloc(size, mem_flags);
1113         if (!buf) {
1114                 usb_free_urb(urb);
1115                 return -ENOMEM;
1116         }
1117
1118         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
1119
1120         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
1121                         btmtk_usb_isoc_in_complete, hdev,
1122                         data->isoc_rx_ep->bInterval);
1123
1124         urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
1125
1126         __fill_isoc_descriptor(urb, size,
1127                         le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
1128
1129         usb_anchor_urb(urb, &data->isoc_anchor);
1130
1131         err = usb_submit_urb(urb, mem_flags);
1132         if (err < 0) {
1133                 if (err != -EPERM && err != -ENODEV)
1134                         BT_ERR("%s urb %p submission failed (%d)",
1135                                                 hdev->name, urb, -err);
1136                 usb_unanchor_urb(urb);
1137         }
1138
1139         usb_free_urb(urb);
1140
1141         return err;
1142 }
1143
1144 static int btmtk_usb_open(struct hci_dev *hdev)
1145 {
1146         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1147         int err;
1148
1149         BT_DBG("%s\n", __func__);
1150
1151         err = usb_autopm_get_interface(data->intf);
1152         if (err < 0)
1153                 return err;
1154
1155         data->intf->needs_remote_wakeup = 1;
1156
1157         if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
1158                 goto done;
1159
1160         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1161                 goto done;
1162
1163         err = btmtk_usb_submit_intr_urb(hdev, GFP_KERNEL);
1164         if (err < 0)
1165                 goto failed;
1166
1167         err = btmtk_usb_submit_bulk_in_urb(hdev, GFP_KERNEL);
1168         if (err < 0) {
1169                 usb_kill_anchored_urbs(&data->intr_anchor);
1170                 goto failed;
1171         }
1172
1173         set_bit(BTUSB_BULK_RUNNING, &data->flags);
1174         btmtk_usb_submit_bulk_in_urb(hdev, GFP_KERNEL);
1175
1176 done:
1177         usb_autopm_put_interface(data->intf);
1178         return 0;
1179
1180 failed:
1181         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1182         clear_bit(HCI_RUNNING, &hdev->flags);
1183         usb_autopm_put_interface(data->intf);
1184         return err;
1185 }
1186
1187 static void btmtk_usb_stop_traffic(struct btmtk_usb_data *data)
1188 {
1189         BT_DBG("%s\n", __func__);
1190
1191         usb_kill_anchored_urbs(&data->intr_anchor);
1192         usb_kill_anchored_urbs(&data->bulk_anchor);
1193         usb_kill_anchored_urbs(&data->isoc_anchor);
1194 }
1195
1196 static int btmtk_usb_close(struct hci_dev *hdev)
1197 {
1198         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1199         int err;
1200
1201         BT_DBG("%s\n", __func__);
1202
1203         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
1204                 return 0;
1205
1206         cancel_work_sync(&data->work);
1207         cancel_work_sync(&data->waker);
1208
1209         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1210         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1211         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1212
1213         btmtk_usb_stop_traffic(data);
1214
1215         err = usb_autopm_get_interface(data->intf);
1216         if (err < 0)
1217                 goto failed;
1218
1219         data->intf->needs_remote_wakeup = 0;
1220         usb_autopm_put_interface(data->intf);
1221
1222 failed:
1223         usb_scuttle_anchored_urbs(&data->deferred);
1224         return 0;
1225 }
1226
1227 static int btmtk_usb_flush(struct hci_dev *hdev)
1228 {
1229         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1230
1231         BT_DBG("%s\n", __func__);
1232
1233         usb_kill_anchored_urbs(&data->tx_anchor);
1234
1235         return 0;
1236 }
1237
1238 static void btmtk_usb_tx_complete(struct urb *urb)
1239 {
1240         struct sk_buff *skb = urb->context;
1241         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1242         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1243
1244         BT_DBG("%s: %s urb %p status %d count %d\n", __func__, hdev->name,
1245                                         urb, urb->status, urb->actual_length);
1246
1247         if (!test_bit(HCI_RUNNING, &hdev->flags))
1248                 goto done;
1249
1250         if (!urb->status)
1251                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1252         else
1253                 hdev->stat.err_tx++;
1254
1255 done:
1256         spin_lock(&data->txlock);
1257         data->tx_in_flight--;
1258         spin_unlock(&data->txlock);
1259
1260         kfree(urb->setup_packet);
1261
1262         kfree_skb(skb);
1263 }
1264
1265 static void btmtk_usb_isoc_tx_complete(struct urb *urb)
1266 {
1267         struct sk_buff *skb = urb->context;
1268         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1269
1270         BT_DBG("%s: %s urb %p status %d count %d", __func__, hdev->name,
1271                                         urb, urb->status, urb->actual_length);
1272
1273         if (!test_bit(HCI_RUNNING, &hdev->flags))
1274                 goto done;
1275
1276         if (!urb->status)
1277                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1278         else
1279                 hdev->stat.err_tx++;
1280
1281 done:
1282         kfree(urb->setup_packet);
1283
1284         kfree_skb(skb);
1285 }
1286
1287 static int btmtk_usb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1288 {
1289         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1290         struct usb_ctrlrequest *dr;
1291         struct urb *urb;
1292         unsigned int pipe;
1293         int err;
1294
1295         BT_DBG("%s\n", __func__);
1296
1297         if (!test_bit(HCI_RUNNING, &hdev->flags))
1298                 return -EBUSY;
1299
1300         switch (bt_cb(skb)->pkt_type) {
1301         case HCI_COMMAND_PKT:
1302                 urb = usb_alloc_urb(0, GFP_ATOMIC);
1303                 if (!urb)
1304                         return -ENOMEM;
1305
1306                 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
1307                 if (!dr) {
1308                         usb_free_urb(urb);
1309                         return -ENOMEM;
1310                 }
1311
1312                 dr->bRequestType = data->cmdreq_type;
1313                 dr->bRequest     = 0;
1314                 dr->wIndex       = 0;
1315                 dr->wValue       = 0;
1316                 dr->wLength      = __cpu_to_le16(skb->len);
1317
1318                 pipe = usb_sndctrlpipe(data->udev, 0x00);
1319
1320                 if (test_bit(HCI_RUNNING, &hdev->flags)) {
1321                         u16 op_code;
1322                         memcpy(&op_code, skb->data, 2);
1323                         BT_DBG("ogf = %x\n", (op_code & 0xfc00) >> 10);
1324                         BT_DBG("ocf = %x\n", op_code & 0x03ff);
1325                         hex_dump("hci command", skb->data, skb->len);
1326
1327                 }
1328
1329                 usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
1330                                 skb->data, skb->len,
1331                                 btmtk_usb_tx_complete, skb);
1332
1333                 hdev->stat.cmd_tx++;
1334                 break;
1335
1336         case HCI_ACLDATA_PKT:
1337                 if (!data->bulk_tx_ep)
1338                         return -ENODEV;
1339
1340                 urb = usb_alloc_urb(0, GFP_ATOMIC);
1341                 if (!urb)
1342                         return -ENOMEM;
1343
1344                 pipe = usb_sndbulkpipe(data->udev,
1345                                         data->bulk_tx_ep->bEndpointAddress);
1346
1347                 usb_fill_bulk_urb(urb, data->udev, pipe, skb->data,
1348                                 skb->len, btmtk_usb_tx_complete, skb);
1349
1350                 hdev->stat.acl_tx++;
1351                 BT_DBG("HCI_ACLDATA_PKT:\n");
1352                 break;
1353
1354         case HCI_SCODATA_PKT:
1355                 if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
1356                         return -ENODEV;
1357
1358                 urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
1359                 if (!urb)
1360                         return -ENOMEM;
1361
1362                 pipe = usb_sndisocpipe(data->udev,
1363                                         data->isoc_tx_ep->bEndpointAddress);
1364
1365                 usb_fill_int_urb(urb, data->udev, pipe,
1366                                 skb->data, skb->len, btmtk_usb_isoc_tx_complete,
1367                                 skb, data->isoc_tx_ep->bInterval);
1368
1369                 urb->transfer_flags  = URB_ISO_ASAP;
1370
1371                 __fill_isoc_descriptor(urb, skb->len,
1372                                 le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1373
1374                 hdev->stat.sco_tx++;
1375                 BT_DBG("HCI_SCODATA_PKT:\n");
1376                 goto skip_waking;
1377
1378         default:
1379                 return -EILSEQ;
1380         }
1381
1382         err = inc_tx(data);
1383
1384         if (err) {
1385                 usb_anchor_urb(urb, &data->deferred);
1386                 schedule_work(&data->waker);
1387                 err = 0;
1388                 goto done;
1389         }
1390
1391 skip_waking:
1392         usb_anchor_urb(urb, &data->tx_anchor);
1393
1394         err = usb_submit_urb(urb, GFP_ATOMIC);
1395         if (err < 0) {
1396                 if (err != -EPERM && err != -ENODEV)
1397                         BT_ERR("%s urb %p submission failed (%d)",
1398                                                 hdev->name, urb, -err);
1399                 kfree(urb->setup_packet);
1400                 usb_unanchor_urb(urb);
1401         } else {
1402                 usb_mark_last_busy(data->udev);
1403         }
1404
1405 done:
1406         usb_free_urb(urb);
1407         return err;
1408 }
1409
1410 static void btmtk_usb_notify(struct hci_dev *hdev, unsigned int evt)
1411 {
1412         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1413
1414         BT_DBG("%s evt %d", hdev->name, evt);
1415
1416         if (hdev->conn_hash.sco_num != data->sco_num) {
1417                 data->sco_num = hdev->conn_hash.sco_num;
1418                 schedule_work(&data->work);
1419         }
1420 }
1421
1422 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1423 {
1424         struct btmtk_usb_data *data = hci_get_drvdata(hdev);
1425         struct usb_interface *intf = data->isoc;
1426         struct usb_endpoint_descriptor *ep_desc;
1427         int i, err;
1428
1429         if (!data->isoc)
1430                 return -ENODEV;
1431
1432         err = usb_set_interface(data->udev, 1, altsetting);
1433         if (err < 0) {
1434                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
1435                 return err;
1436         }
1437
1438         data->isoc_altsetting = altsetting;
1439
1440         data->isoc_tx_ep = NULL;
1441         data->isoc_rx_ep = NULL;
1442
1443         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1444                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1445
1446                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1447                         data->isoc_tx_ep = ep_desc;
1448                         continue;
1449                 }
1450
1451                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1452                         data->isoc_rx_ep = ep_desc;
1453                         continue;
1454                 }
1455         }
1456
1457         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1458                 BT_ERR("%s invalid SCO descriptors", hdev->name);
1459                 return -ENODEV;
1460         }
1461
1462         return 0;
1463 }
1464
1465 static void btmtk_usb_work(struct work_struct *work)
1466 {
1467         struct btmtk_usb_data *data = container_of(work, struct btmtk_usb_data,
1468                         work);
1469         struct hci_dev *hdev = data->hdev;
1470         int new_alts;
1471         int err;
1472
1473         BT_DBG("%s\n", __func__);
1474
1475         if (hdev->conn_hash.sco_num > 0) {
1476                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1477                         err = usb_autopm_get_interface(data->isoc ?
1478                                         data->isoc : data->intf);
1479                         if (err < 0) {
1480                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1481                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1482                                 return;
1483                         }
1484
1485                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1486                 }
1487
1488                 if (hdev->voice_setting & 0x0020) {
1489                         static const int alts[3] = { 2, 4, 5 };
1490                         new_alts = alts[hdev->conn_hash.sco_num - 1];
1491                 } else {
1492                         new_alts = hdev->conn_hash.sco_num;
1493                 }
1494
1495                 if (data->isoc_altsetting != new_alts) {
1496                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1497                         usb_kill_anchored_urbs(&data->isoc_anchor);
1498
1499                         if (__set_isoc_interface(hdev, new_alts) < 0)
1500                                 return;
1501                 }
1502
1503                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1504                         if (btmtk_usb_submit_isoc_in_urb(hdev, GFP_KERNEL) < 0)
1505                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1506                         else
1507                                 btmtk_usb_submit_isoc_in_urb(hdev, GFP_KERNEL);
1508                 }
1509         } else {
1510                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1511                 usb_kill_anchored_urbs(&data->isoc_anchor);
1512
1513                 __set_isoc_interface(hdev, 0);
1514
1515                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1516                         usb_autopm_put_interface(data->isoc ?
1517                                          data->isoc : data->intf);
1518         }
1519 }
1520
1521 static void btmtk_usb_waker(struct work_struct *work)
1522 {
1523         struct btmtk_usb_data *data = container_of(work, struct btmtk_usb_data,
1524                         waker);
1525         int err;
1526
1527         err = usb_autopm_get_interface(data->intf);
1528
1529         if (err < 0)
1530                 return;
1531
1532         usb_autopm_put_interface(data->intf);
1533 }
1534
1535 static int btmtk_usb_probe(struct usb_interface *intf,
1536                                         const struct usb_device_id *id)
1537 {
1538         struct btmtk_usb_data *data;
1539         struct usb_endpoint_descriptor *ep_desc;
1540         int i, err;
1541         struct hci_dev *hdev;
1542
1543         /* interface numbers are hardcoded in the spec */
1544         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
1545                 return -ENODEV;
1546
1547         data = kzalloc(sizeof(*data), GFP_KERNEL);
1548
1549         if (!data)
1550                 return -ENOMEM;
1551
1552         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1553                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1554
1555                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
1556                         data->intr_ep = ep_desc;
1557                         continue;
1558                 }
1559
1560                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
1561                         data->bulk_tx_ep = ep_desc;
1562                         continue;
1563                 }
1564
1565                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
1566                         data->bulk_rx_ep = ep_desc;
1567                         continue;
1568                 }
1569         }
1570
1571         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
1572                 kfree(data);
1573                 return -ENODEV;
1574         }
1575
1576         data->cmdreq_type = USB_TYPE_CLASS;
1577
1578         data->udev = interface_to_usbdev(intf);
1579         data->intf = intf;
1580
1581         spin_lock_init(&data->lock);
1582         INIT_WORK(&data->work, btmtk_usb_work);
1583         INIT_WORK(&data->waker, btmtk_usb_waker);
1584         spin_lock_init(&data->txlock);
1585
1586         init_usb_anchor(&data->tx_anchor);
1587         init_usb_anchor(&data->intr_anchor);
1588         init_usb_anchor(&data->bulk_anchor);
1589         init_usb_anchor(&data->isoc_anchor);
1590         init_usb_anchor(&data->deferred);
1591
1592         hdev = hci_alloc_dev();
1593         if (!hdev) {
1594                 kfree(data);
1595                 return -ENOMEM;
1596         }
1597
1598         hdev->bus = HCI_USB;
1599
1600         hci_set_drvdata(hdev, data);
1601
1602         data->hdev = hdev;
1603
1604         SET_HCIDEV_DEV(hdev, &intf->dev);
1605
1606         hdev->open     = btmtk_usb_open;
1607         hdev->close    = btmtk_usb_close;
1608         hdev->flush    = btmtk_usb_flush;
1609         hdev->send     = btmtk_usb_send_frame;
1610         hdev->notify   = btmtk_usb_notify;
1611
1612         /* Interface numbers are hardcoded in the specification */
1613         data->isoc = usb_ifnum_to_if(data->udev, 1);
1614
1615         if (data->isoc) {
1616                 err = usb_driver_claim_interface(&btmtk_usb_driver,
1617                                                         data->isoc, data);
1618                 if (err < 0) {
1619                         hci_free_dev(hdev);
1620                         kfree(data);
1621                         return err;
1622                 }
1623         }
1624
1625         data->io_buf = kmalloc(256, GFP_KERNEL);
1626         if (!data->io_buf) {
1627                 hci_free_dev(hdev);
1628                 kfree(data);
1629                 return -ENOMEM;
1630         }
1631
1632         btmtk_usb_switch_iobase(data, WLAN);
1633
1634         btmtk_usb_cap_init(data);
1635
1636         err = hci_register_dev(hdev);
1637         if (err < 0) {
1638                 hci_free_dev(hdev);
1639                 kfree(data);
1640                 return err;
1641         }
1642
1643         usb_set_intfdata(intf, data);
1644
1645         return 0;
1646 }
1647
1648 static void btmtk_usb_disconnect(struct usb_interface *intf)
1649 {
1650         struct btmtk_usb_data *data = usb_get_intfdata(intf);
1651         struct hci_dev *hdev;
1652
1653         BT_DBG("%s\n", __func__);
1654
1655         if (!data)
1656                 return;
1657
1658         hdev = data->hdev;
1659         usb_set_intfdata(data->intf, NULL);
1660
1661         if (data->isoc)
1662                 usb_set_intfdata(data->isoc, NULL);
1663
1664         hci_unregister_dev(hdev);
1665
1666         if (intf == data->isoc)
1667                 usb_driver_release_interface(&btmtk_usb_driver, data->intf);
1668         else if (data->isoc)
1669                 usb_driver_release_interface(&btmtk_usb_driver, data->isoc);
1670
1671         hci_free_dev(hdev);
1672
1673         kfree(data->io_buf);
1674
1675         kfree(data);
1676 }
1677
1678 #ifdef CONFIG_PM
1679 static int btmtk_usb_suspend(struct usb_interface *intf, pm_message_t message)
1680 {
1681         struct btmtk_usb_data *data = usb_get_intfdata(intf);
1682
1683         BT_DBG("%s\n", __func__);
1684
1685         if (data->suspend_count++)
1686                 return 0;
1687
1688         spin_lock_irq(&data->txlock);
1689         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
1690                 set_bit(BTUSB_SUSPENDING, &data->flags);
1691                 spin_unlock_irq(&data->txlock);
1692         } else {
1693                 spin_unlock_irq(&data->txlock);
1694                 data->suspend_count--;
1695                 return -EBUSY;
1696         }
1697
1698         cancel_work_sync(&data->work);
1699
1700         btmtk_usb_stop_traffic(data);
1701         usb_kill_anchored_urbs(&data->tx_anchor);
1702
1703         return 0;
1704 }
1705
1706 static void play_deferred(struct btmtk_usb_data *data)
1707 {
1708         struct urb *urb;
1709         int err;
1710
1711         while ((urb = usb_get_from_anchor(&data->deferred))) {
1712                 err = usb_submit_urb(urb, GFP_ATOMIC);
1713                 if (err < 0)
1714                         break;
1715
1716                 data->tx_in_flight++;
1717         }
1718
1719         usb_scuttle_anchored_urbs(&data->deferred);
1720 }
1721
1722 static int btmtk_usb_resume(struct usb_interface *intf)
1723 {
1724         struct btmtk_usb_data *data = usb_get_intfdata(intf);
1725         struct hci_dev *hdev = data->hdev;
1726         int err = 0;
1727
1728         BT_DBG("%s\n", __func__);
1729
1730         if (--data->suspend_count)
1731                 return 0;
1732
1733         if (!test_bit(HCI_RUNNING, &hdev->flags))
1734                 goto done;
1735
1736         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1737                 err = btmtk_usb_submit_intr_urb(hdev, GFP_NOIO);
1738                 if (err < 0) {
1739                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1740                         goto failed;
1741                 }
1742         }
1743
1744         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1745                 err = btmtk_usb_submit_bulk_in_urb(hdev, GFP_NOIO);
1746                 if (err < 0) {
1747                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1748                         goto failed;
1749                 }
1750
1751                 btmtk_usb_submit_bulk_in_urb(hdev, GFP_NOIO);
1752         }
1753
1754         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1755                 if (btmtk_usb_submit_isoc_in_urb(hdev, GFP_NOIO) < 0)
1756                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1757                 else
1758                         btmtk_usb_submit_isoc_in_urb(hdev, GFP_NOIO);
1759         }
1760
1761         spin_lock_irq(&data->txlock);
1762         play_deferred(data);
1763         clear_bit(BTUSB_SUSPENDING, &data->flags);
1764         spin_unlock_irq(&data->txlock);
1765         schedule_work(&data->work);
1766
1767         return 0;
1768
1769 failed:
1770         usb_scuttle_anchored_urbs(&data->deferred);
1771 done:
1772         spin_lock_irq(&data->txlock);
1773         clear_bit(BTUSB_SUSPENDING, &data->flags);
1774         spin_unlock_irq(&data->txlock);
1775
1776         return err;
1777 }
1778 #endif
1779
1780 static struct usb_device_id btmtk_usb_table[] = {
1781         /* Mediatek MT7650 */
1782         { USB_DEVICE(0x0e8d, 0x7650) },
1783         { USB_DEVICE(0x0e8d, 0x7630) },
1784         { USB_DEVICE(0x0e8d, 0x763e) },
1785         /* Mediatek MT662 */
1786         { USB_DEVICE(0x0e8d, 0x7662) },
1787         { USB_DEVICE(0x0e8d, 0x7632) },
1788         { }     /* Terminating entry */
1789 };
1790
1791 static struct usb_driver btmtk_usb_driver = {
1792         .name           = "btmtk_usb",
1793         .probe          = btmtk_usb_probe,
1794         .disconnect     = btmtk_usb_disconnect,
1795 #ifdef CONFIG_PM
1796         .suspend        = btmtk_usb_suspend,
1797         .resume         = btmtk_usb_resume,
1798 #endif
1799         .id_table       = btmtk_usb_table,
1800         .supports_autosuspend = 1,
1801         .disable_hub_initiated_lpm = 1,
1802 };
1803
1804 module_usb_driver(btmtk_usb_driver);
1805
1806 MODULE_DESCRIPTION("Mediatek Bluetooth USB driver ver " VERSION);
1807 MODULE_VERSION(VERSION);
1808 MODULE_LICENSE("GPL");
1809 MODULE_FIRMWARE(MT7650_FIRMWARE);
1810 MODULE_FIRMWARE(MT7662_FIRMWARE);