drivers/bluetooth/btmtk.c

   1 // SPDX-License-Identifier: ISC
   2 /* Copyright (C) 2021 MediaTek Inc.
   3  *
   4  */
   5 #include <linux/module.h>
   6 #include <linux/firmware.h>
   7 #include <linux/usb.h>
   8 #include <linux/iopoll.h>
   9 #include <asm/unaligned.h>
  10
  11 #include <net/bluetooth/bluetooth.h>
  12 #include <net/bluetooth/hci_core.h>
  13
  14 #include "btmtk.h"
  15
  16 #define VERSION "0.1"
  17
  18 /* It is for mt79xx download rom patch*/
  19 #define MTK_FW_ROM_PATCH_HEADER_SIZE    32
  20 #define MTK_FW_ROM_PATCH_GD_SIZE        64
  21 #define MTK_FW_ROM_PATCH_SEC_MAP_SIZE   64
  22 #define MTK_SEC_MAP_COMMON_SIZE 12
  23 #define MTK_SEC_MAP_NEED_SEND_SIZE      52
  24
  25 /* It is for mt79xx iso data transmission setting */
  26 #define MTK_ISO_THRESHOLD       264
  27
  28 struct btmtk_patch_header {
  29         u8 datetime[16];
  30         u8 platform[4];
  31         __le16 hwver;
  32         __le16 swver;
  33         __le32 magicnum;
  34 } __packed;
  35
  36 struct btmtk_global_desc {
  37         __le32 patch_ver;
  38         __le32 sub_sys;
  39         __le32 feature_opt;
  40         __le32 section_num;
  41 } __packed;
  42
  43 struct btmtk_section_map {
  44         __le32 sectype;
  45         __le32 secoffset;
  46         __le32 secsize;
  47         union {
  48                 __le32 u4SecSpec[13];
  49                 struct {
  50                         __le32 dlAddr;
  51                         __le32 dlsize;
  52                         __le32 seckeyidx;
  53                         __le32 alignlen;
  54                         __le32 sectype;
  55                         __le32 dlmodecrctype;
  56                         __le32 crc;
  57                         __le32 reserved[6];
  58                 } bin_info_spec;
  59         };
  60 } __packed;
  61
  62 static void btmtk_coredump(struct hci_dev *hdev)
  63 {
  64         int err;
  65
  66         err = __hci_cmd_send(hdev, 0xfd5b, 0, NULL);
  67         if (err < 0)
  68                 bt_dev_err(hdev, "Coredump failed (%d)", err);
  69 }
  70
  71 static void btmtk_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb)
  72 {
  73         struct btmtk_data *data = hci_get_priv(hdev);
  74         char buf[80];
  75
  76         snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n",
  77                  data->dev_id);
  78         skb_put_data(skb, buf, strlen(buf));
  79
  80         snprintf(buf, sizeof(buf), "Firmware Version: 0x%X\n",
  81                  data->cd_info.fw_version);
  82         skb_put_data(skb, buf, strlen(buf));
  83
  84         snprintf(buf, sizeof(buf), "Driver: %s\n",
  85                  data->cd_info.driver_name);
  86         skb_put_data(skb, buf, strlen(buf));
  87
  88         snprintf(buf, sizeof(buf), "Vendor: MediaTek\n");
  89         skb_put_data(skb, buf, strlen(buf));
  90 }
  91
  92 static void btmtk_coredump_notify(struct hci_dev *hdev, int state)
  93 {
  94         struct btmtk_data *data = hci_get_priv(hdev);
  95
  96         switch (state) {
  97         case HCI_DEVCOREDUMP_IDLE:
  98                 data->cd_info.state = HCI_DEVCOREDUMP_IDLE;
  99                 break;
 100         case HCI_DEVCOREDUMP_ACTIVE:
 101                 data->cd_info.state = HCI_DEVCOREDUMP_ACTIVE;
 102                 break;
 103         case HCI_DEVCOREDUMP_TIMEOUT:
 104         case HCI_DEVCOREDUMP_ABORT:
 105         case HCI_DEVCOREDUMP_DONE:
 106                 data->cd_info.state = HCI_DEVCOREDUMP_IDLE;
 107                 btmtk_reset_sync(hdev);
 108                 break;
 109         }
 110 }
 111
 112 void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id, u32 fw_ver,
 113                            u32 fw_flavor)
 114 {
 115         if (dev_id == 0x7925)
 116                 snprintf(buf, size,
 117                          "mediatek/mt%04x/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
 118                          dev_id & 0xffff, dev_id & 0xffff, (fw_ver & 0xff) + 1);
 119         else if (dev_id == 0x7961 && fw_flavor)
 120                 snprintf(buf, size,
 121                          "mediatek/BT_RAM_CODE_MT%04x_1a_%x_hdr.bin",
 122                          dev_id & 0xffff, (fw_ver & 0xff) + 1);
 123         else
 124                 snprintf(buf, size,
 125                          "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
 126                          dev_id & 0xffff, (fw_ver & 0xff) + 1);
 127 }
 128 EXPORT_SYMBOL_GPL(btmtk_fw_get_filename);
 129
 130 int btmtk_setup_firmware_79xx(struct hci_dev *hdev, const char *fwname,
 131                               wmt_cmd_sync_func_t wmt_cmd_sync)
 132 {
 133         struct btmtk_hci_wmt_params wmt_params;
 134         struct btmtk_patch_header *hdr;
 135         struct btmtk_global_desc *globaldesc = NULL;
 136         struct btmtk_section_map *sectionmap;
 137         const struct firmware *fw;
 138         const u8 *fw_ptr;
 139         const u8 *fw_bin_ptr;
 140         int err, dlen, i, status;
 141         u8 flag, first_block, retry;
 142         u32 section_num, dl_size, section_offset;
 143         u8 cmd[64];
 144
 145         err = request_firmware(&fw, fwname, &hdev->dev);
 146         if (err < 0) {
 147                 bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
 148                 return err;
 149         }
 150
 151         fw_ptr = fw->data;
 152         fw_bin_ptr = fw_ptr;
 153         hdr = (struct btmtk_patch_header *)fw_ptr;
 154         globaldesc = (struct btmtk_global_desc *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE);
 155         section_num = le32_to_cpu(globaldesc->section_num);
 156
 157         bt_dev_info(hdev, "HW/SW Version: 0x%04x%04x, Build Time: %s",
 158                     le16_to_cpu(hdr->hwver), le16_to_cpu(hdr->swver), hdr->datetime);
 159
 160         for (i = 0; i < section_num; i++) {
 161                 first_block = 1;
 162                 fw_ptr = fw_bin_ptr;
 163                 sectionmap = (struct btmtk_section_map *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE +
 164                               MTK_FW_ROM_PATCH_GD_SIZE + MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i);
 165
 166                 section_offset = le32_to_cpu(sectionmap->secoffset);
 167                 dl_size = le32_to_cpu(sectionmap->bin_info_spec.dlsize);
 168
 169                 if (dl_size > 0) {
 170                         retry = 20;
 171                         while (retry > 0) {
 172                                 cmd[0] = 0; /* 0 means legacy dl mode. */
 173                                 memcpy(cmd + 1,
 174                                        fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE +
 175                                        MTK_FW_ROM_PATCH_GD_SIZE +
 176                                        MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i +
 177                                        MTK_SEC_MAP_COMMON_SIZE,
 178                                        MTK_SEC_MAP_NEED_SEND_SIZE + 1);
 179
 180                                 wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
 181                                 wmt_params.status = &status;
 182                                 wmt_params.flag = 0;
 183                                 wmt_params.dlen = MTK_SEC_MAP_NEED_SEND_SIZE + 1;
 184                                 wmt_params.data = &cmd;
 185
 186                                 err = wmt_cmd_sync(hdev, &wmt_params);
 187                                 if (err < 0) {
 188                                         bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
 189                                                    err);
 190                                         goto err_release_fw;
 191                                 }
 192
 193                                 if (status == BTMTK_WMT_PATCH_UNDONE) {
 194                                         break;
 195                                 } else if (status == BTMTK_WMT_PATCH_PROGRESS) {
 196                                         msleep(100);
 197                                         retry--;
 198                                 } else if (status == BTMTK_WMT_PATCH_DONE) {
 199                                         goto next_section;
 200                                 } else {
 201                                         bt_dev_err(hdev, "Failed wmt patch dwnld status (%d)",
 202                                                    status);
 203                                         err = -EIO;
 204                                         goto err_release_fw;
 205                                 }
 206                         }
 207
 208                         fw_ptr += section_offset;
 209                         wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
 210                         wmt_params.status = NULL;
 211
 212                         while (dl_size > 0) {
 213                                 dlen = min_t(int, 250, dl_size);
 214                                 if (first_block == 1) {
 215                                         flag = 1;
 216                                         first_block = 0;
 217                                 } else if (dl_size - dlen <= 0) {
 218                                         flag = 3;
 219                                 } else {
 220                                         flag = 2;
 221                                 }
 222
 223                                 wmt_params.flag = flag;
 224                                 wmt_params.dlen = dlen;
 225                                 wmt_params.data = fw_ptr;
 226
 227                                 err = wmt_cmd_sync(hdev, &wmt_params);
 228                                 if (err < 0) {
 229                                         bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
 230                                                    err);
 231                                         goto err_release_fw;
 232                                 }
 233
 234                                 dl_size -= dlen;
 235                                 fw_ptr += dlen;
 236                         }
 237                 }
 238 next_section:
 239                 continue;
 240         }
 241         /* Wait a few moments for firmware activation done */
 242         usleep_range(100000, 120000);
 243
 244 err_release_fw:
 245         release_firmware(fw);
 246
 247         return err;
 248 }
 249 EXPORT_SYMBOL_GPL(btmtk_setup_firmware_79xx);
 250
 251 int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname,
 252                          wmt_cmd_sync_func_t wmt_cmd_sync)
 253 {
 254         struct btmtk_hci_wmt_params wmt_params;
 255         const struct firmware *fw;
 256         const u8 *fw_ptr;
 257         size_t fw_size;
 258         int err, dlen;
 259         u8 flag, param;
 260
 261         err = request_firmware(&fw, fwname, &hdev->dev);
 262         if (err < 0) {
 263                 bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
 264                 return err;
 265         }
 266
 267         /* Power on data RAM the firmware relies on. */
 268         param = 1;
 269         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
 270         wmt_params.flag = 3;
 271         wmt_params.dlen = sizeof(param);
 272         wmt_params.data = &param;
 273         wmt_params.status = NULL;
 274
 275         err = wmt_cmd_sync(hdev, &wmt_params);
 276         if (err < 0) {
 277                 bt_dev_err(hdev, "Failed to power on data RAM (%d)", err);
 278                 goto err_release_fw;
 279         }
 280
 281         fw_ptr = fw->data;
 282         fw_size = fw->size;
 283
 284         /* The size of patch header is 30 bytes, should be skip */
 285         if (fw_size < 30) {
 286                 err = -EINVAL;
 287                 goto err_release_fw;
 288         }
 289
 290         fw_size -= 30;
 291         fw_ptr += 30;
 292         flag = 1;
 293
 294         wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
 295         wmt_params.status = NULL;
 296
 297         while (fw_size > 0) {
 298                 dlen = min_t(int, 250, fw_size);
 299
 300                 /* Tell device the position in sequence */
 301                 if (fw_size - dlen <= 0)
 302                         flag = 3;
 303                 else if (fw_size < fw->size - 30)
 304                         flag = 2;
 305
 306                 wmt_params.flag = flag;
 307                 wmt_params.dlen = dlen;
 308                 wmt_params.data = fw_ptr;
 309
 310                 err = wmt_cmd_sync(hdev, &wmt_params);
 311                 if (err < 0) {
 312                         bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
 313                                    err);
 314                         goto err_release_fw;
 315                 }
 316
 317                 fw_size -= dlen;
 318                 fw_ptr += dlen;
 319         }
 320
 321         wmt_params.op = BTMTK_WMT_RST;
 322         wmt_params.flag = 4;
 323         wmt_params.dlen = 0;
 324         wmt_params.data = NULL;
 325         wmt_params.status = NULL;
 326
 327         /* Activate funciton the firmware providing to */
 328         err = wmt_cmd_sync(hdev, &wmt_params);
 329         if (err < 0) {
 330                 bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
 331                 goto err_release_fw;
 332         }
 333
 334         /* Wait a few moments for firmware activation done */
 335         usleep_range(10000, 12000);
 336
 337 err_release_fw:
 338         release_firmware(fw);
 339
 340         return err;
 341 }
 342 EXPORT_SYMBOL_GPL(btmtk_setup_firmware);
 343
 344 int btmtk_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 345 {
 346         struct sk_buff *skb;
 347         long ret;
 348
 349         skb = __hci_cmd_sync(hdev, 0xfc1a, 6, bdaddr, HCI_INIT_TIMEOUT);
 350         if (IS_ERR(skb)) {
 351                 ret = PTR_ERR(skb);
 352                 bt_dev_err(hdev, "changing Mediatek device address failed (%ld)",
 353                            ret);
 354                 return ret;
 355         }
 356         kfree_skb(skb);
 357
 358         return 0;
 359 }
 360 EXPORT_SYMBOL_GPL(btmtk_set_bdaddr);
 361
 362 void btmtk_reset_sync(struct hci_dev *hdev)
 363 {
 364         struct btmtk_data *reset_work = hci_get_priv(hdev);
 365         int err;
 366
 367         hci_dev_lock(hdev);
 368
 369         err = hci_cmd_sync_queue(hdev, reset_work->reset_sync, NULL, NULL);
 370         if (err)
 371                 bt_dev_err(hdev, "failed to reset (%d)", err);
 372
 373         hci_dev_unlock(hdev);
 374 }
 375 EXPORT_SYMBOL_GPL(btmtk_reset_sync);
 376
 377 int btmtk_register_coredump(struct hci_dev *hdev, const char *name,
 378                             u32 fw_version)
 379 {
 380         struct btmtk_data *data = hci_get_priv(hdev);
 381
 382         if (!IS_ENABLED(CONFIG_DEV_COREDUMP))
 383                 return -EOPNOTSUPP;
 384
 385         data->cd_info.fw_version = fw_version;
 386         data->cd_info.state = HCI_DEVCOREDUMP_IDLE;
 387         data->cd_info.driver_name = name;
 388
 389         return hci_devcd_register(hdev, btmtk_coredump, btmtk_coredump_hdr,
 390                                   btmtk_coredump_notify);
 391 }
 392 EXPORT_SYMBOL_GPL(btmtk_register_coredump);
 393
 394 int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb)
 395 {
 396         struct btmtk_data *data = hci_get_priv(hdev);
 397         int err;
 398
 399         if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) {
 400                 kfree_skb(skb);
 401                 return 0;
 402         }
 403
 404         switch (data->cd_info.state) {
 405         case HCI_DEVCOREDUMP_IDLE:
 406                 err = hci_devcd_init(hdev, MTK_COREDUMP_SIZE);
 407                 if (err < 0) {
 408                         kfree_skb(skb);
 409                         break;
 410                 }
 411                 data->cd_info.cnt = 0;
 412
 413                 /* It is supposed coredump can be done within 5 seconds */
 414                 schedule_delayed_work(&hdev->dump.dump_timeout,
 415                                       msecs_to_jiffies(5000));
 416                 fallthrough;
 417         case HCI_DEVCOREDUMP_ACTIVE:
 418         default:
 419                 err = hci_devcd_append(hdev, skb);
 420                 if (err < 0)
 421                         break;
 422                 data->cd_info.cnt++;
 423
 424                 /* Mediatek coredump data would be more than MTK_COREDUMP_NUM */
 425                 if (data->cd_info.cnt > MTK_COREDUMP_NUM &&
 426                     skb->len > MTK_COREDUMP_END_LEN)
 427                         if (!memcmp((char *)&skb->data[skb->len - MTK_COREDUMP_END_LEN],
 428                                     MTK_COREDUMP_END, MTK_COREDUMP_END_LEN - 1)) {
 429                                 bt_dev_info(hdev, "Mediatek coredump end");
 430                                 hci_devcd_complete(hdev);
 431                         }
 432
 433                 break;
 434         }
 435
 436         return err;
 437 }
 438 EXPORT_SYMBOL_GPL(btmtk_process_coredump);
 439
 440 #if IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK)
 441 static void btmtk_usb_wmt_recv(struct urb *urb)
 442 {
 443         struct hci_dev *hdev = urb->context;
 444         struct btmtk_data *data = hci_get_priv(hdev);
 445         struct sk_buff *skb;
 446         int err;
 447
 448         if (urb->status == 0 && urb->actual_length > 0) {
 449                 hdev->stat.byte_rx += urb->actual_length;
 450
 451                 /* WMT event shouldn't be fragmented and the size should be
 452                  * less than HCI_WMT_MAX_EVENT_SIZE.
 453                  */
 454                 skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
 455                 if (!skb) {
 456                         hdev->stat.err_rx++;
 457                         kfree(urb->setup_packet);
 458                         return;
 459                 }
 460
 461                 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
 462                 skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
 463
 464                 /* When someone waits for the WMT event, the skb is being cloned
 465                  * and being processed the events from there then.
 466                  */
 467                 if (test_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags)) {
 468                         data->evt_skb = skb_clone(skb, GFP_ATOMIC);
 469                         if (!data->evt_skb) {
 470                                 kfree_skb(skb);
 471                                 kfree(urb->setup_packet);
 472                                 return;
 473                         }
 474                 }
 475
 476                 err = hci_recv_frame(hdev, skb);
 477                 if (err < 0) {
 478                         kfree_skb(data->evt_skb);
 479                         data->evt_skb = NULL;
 480                         kfree(urb->setup_packet);
 481                         return;
 482                 }
 483
 484                 if (test_and_clear_bit(BTMTK_TX_WAIT_VND_EVT,
 485                                        &data->flags)) {
 486                         /* Barrier to sync with other CPUs */
 487                         smp_mb__after_atomic();
 488                         wake_up_bit(&data->flags,
 489                                     BTMTK_TX_WAIT_VND_EVT);
 490                 }
 491                 kfree(urb->setup_packet);
 492                 return;
 493         } else if (urb->status == -ENOENT) {
 494                 /* Avoid suspend failed when usb_kill_urb */
 495                 return;
 496         }
 497
 498         usb_mark_last_busy(data->udev);
 499
 500         /* The URB complete handler is still called with urb->actual_length = 0
 501          * when the event is not available, so we should keep re-submitting
 502          * URB until WMT event returns, Also, It's necessary to wait some time
 503          * between the two consecutive control URBs to relax the target device
 504          * to generate the event. Otherwise, the WMT event cannot return from
 505          * the device successfully.
 506          */
 507         udelay(500);
 508
 509         usb_anchor_urb(urb, data->ctrl_anchor);
 510         err = usb_submit_urb(urb, GFP_ATOMIC);
 511         if (err < 0) {
 512                 kfree(urb->setup_packet);
 513                 /* -EPERM: urb is being killed;
 514                  * -ENODEV: device got disconnected
 515                  */
 516                 if (err != -EPERM && err != -ENODEV)
 517                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
 518                                    urb, -err);
 519                 usb_unanchor_urb(urb);
 520         }
 521 }
 522
 523 static int btmtk_usb_submit_wmt_recv_urb(struct hci_dev *hdev)
 524 {
 525         struct btmtk_data *data = hci_get_priv(hdev);
 526         struct usb_ctrlrequest *dr;
 527         unsigned char *buf;
 528         int err, size = 64;
 529         unsigned int pipe;
 530         struct urb *urb;
 531
 532         urb = usb_alloc_urb(0, GFP_KERNEL);
 533         if (!urb)
 534                 return -ENOMEM;
 535
 536         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
 537         if (!dr) {
 538                 usb_free_urb(urb);
 539                 return -ENOMEM;
 540         }
 541
 542         dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
 543         dr->bRequest     = 1;
 544         dr->wIndex       = cpu_to_le16(0);
 545         dr->wValue       = cpu_to_le16(48);
 546         dr->wLength      = cpu_to_le16(size);
 547
 548         buf = kmalloc(size, GFP_KERNEL);
 549         if (!buf) {
 550                 kfree(dr);
 551                 usb_free_urb(urb);
 552                 return -ENOMEM;
 553         }
 554
 555         pipe = usb_rcvctrlpipe(data->udev, 0);
 556
 557         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
 558                              buf, size, btmtk_usb_wmt_recv, hdev);
 559
 560         urb->transfer_flags |= URB_FREE_BUFFER;
 561
 562         usb_anchor_urb(urb, data->ctrl_anchor);
 563         err = usb_submit_urb(urb, GFP_KERNEL);
 564         if (err < 0) {
 565                 if (err != -EPERM && err != -ENODEV)
 566                         bt_dev_err(hdev, "urb %p submission failed (%d)",
 567                                    urb, -err);
 568                 usb_unanchor_urb(urb);
 569         }
 570
 571         usb_free_urb(urb);
 572
 573         return err;
 574 }
 575
 576 static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
 577                                   struct btmtk_hci_wmt_params *wmt_params)
 578 {
 579         struct btmtk_data *data = hci_get_priv(hdev);
 580         struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
 581         u32 hlen, status = BTMTK_WMT_INVALID;
 582         struct btmtk_hci_wmt_evt *wmt_evt;
 583         struct btmtk_hci_wmt_cmd *wc;
 584         struct btmtk_wmt_hdr *hdr;
 585         int err;
 586
 587         /* Send the WMT command and wait until the WMT event returns */
 588         hlen = sizeof(*hdr) + wmt_params->dlen;
 589         if (hlen > 255)
 590                 return -EINVAL;
 591
 592         wc = kzalloc(hlen, GFP_KERNEL);
 593         if (!wc)
 594                 return -ENOMEM;
 595
 596         hdr = &wc->hdr;
 597         hdr->dir = 1;
 598         hdr->op = wmt_params->op;
 599         hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
 600         hdr->flag = wmt_params->flag;
 601         memcpy(wc->data, wmt_params->data, wmt_params->dlen);
 602
 603         set_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
 604
 605         /* WMT cmd/event doesn't follow up the generic HCI cmd/event handling,
 606          * it needs constantly polling control pipe until the host received the
 607          * WMT event, thus, we should require to specifically acquire PM counter
 608          * on the USB to prevent the interface from entering auto suspended
 609          * while WMT cmd/event in progress.
 610          */
 611         err = usb_autopm_get_interface(data->intf);
 612         if (err < 0)
 613                 goto err_free_wc;
 614
 615         err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
 616
 617         if (err < 0) {
 618                 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
 619                 usb_autopm_put_interface(data->intf);
 620                 goto err_free_wc;
 621         }
 622
 623         /* Submit control IN URB on demand to process the WMT event */
 624         err = btmtk_usb_submit_wmt_recv_urb(hdev);
 625
 626         usb_autopm_put_interface(data->intf);
 627
 628         if (err < 0)
 629                 goto err_free_wc;
 630
 631         /* The vendor specific WMT commands are all answered by a vendor
 632          * specific event and will have the Command Status or Command
 633          * Complete as with usual HCI command flow control.
 634          *
 635          * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
 636          * state to be cleared. The driver specific event receive routine
 637          * will clear that state and with that indicate completion of the
 638          * WMT command.
 639          */
 640         err = wait_on_bit_timeout(&data->flags, BTMTK_TX_WAIT_VND_EVT,
 641                                   TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
 642         if (err == -EINTR) {
 643                 bt_dev_err(hdev, "Execution of wmt command interrupted");
 644                 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
 645                 goto err_free_wc;
 646         }
 647
 648         if (err) {
 649                 bt_dev_err(hdev, "Execution of wmt command timed out");
 650                 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
 651                 err = -ETIMEDOUT;
 652                 goto err_free_wc;
 653         }
 654
 655         if (data->evt_skb == NULL)
 656                 goto err_free_wc;
 657
 658         /* Parse and handle the return WMT event */
 659         wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
 660         if (wmt_evt->whdr.op != hdr->op) {
 661                 bt_dev_err(hdev, "Wrong op received %d expected %d",
 662                            wmt_evt->whdr.op, hdr->op);
 663                 err = -EIO;
 664                 goto err_free_skb;
 665         }
 666
 667         switch (wmt_evt->whdr.op) {
 668         case BTMTK_WMT_SEMAPHORE:
 669                 if (wmt_evt->whdr.flag == 2)
 670                         status = BTMTK_WMT_PATCH_UNDONE;
 671                 else
 672                         status = BTMTK_WMT_PATCH_DONE;
 673                 break;
 674         case BTMTK_WMT_FUNC_CTRL:
 675                 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
 676                 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
 677                         status = BTMTK_WMT_ON_DONE;
 678                 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
 679                         status = BTMTK_WMT_ON_PROGRESS;
 680                 else
 681                         status = BTMTK_WMT_ON_UNDONE;
 682                 break;
 683         case BTMTK_WMT_PATCH_DWNLD:
 684                 if (wmt_evt->whdr.flag == 2)
 685                         status = BTMTK_WMT_PATCH_DONE;
 686                 else if (wmt_evt->whdr.flag == 1)
 687                         status = BTMTK_WMT_PATCH_PROGRESS;
 688                 else
 689                         status = BTMTK_WMT_PATCH_UNDONE;
 690                 break;
 691         }
 692
 693         if (wmt_params->status)
 694                 *wmt_params->status = status;
 695
 696 err_free_skb:
 697         kfree_skb(data->evt_skb);
 698         data->evt_skb = NULL;
 699 err_free_wc:
 700         kfree(wc);
 701         return err;
 702 }
 703
 704 static int btmtk_usb_func_query(struct hci_dev *hdev)
 705 {
 706         struct btmtk_hci_wmt_params wmt_params;
 707         int status, err;
 708         u8 param = 0;
 709
 710         /* Query whether the function is enabled */
 711         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
 712         wmt_params.flag = 4;
 713         wmt_params.dlen = sizeof(param);
 714         wmt_params.data = &param;
 715         wmt_params.status = &status;
 716
 717         err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
 718         if (err < 0) {
 719                 bt_dev_err(hdev, "Failed to query function status (%d)", err);
 720                 return err;
 721         }
 722
 723         return status;
 724 }
 725
 726 static int btmtk_usb_uhw_reg_write(struct hci_dev *hdev, u32 reg, u32 val)
 727 {
 728         struct btmtk_data *data = hci_get_priv(hdev);
 729         int pipe, err;
 730         void *buf;
 731
 732         buf = kzalloc(4, GFP_KERNEL);
 733         if (!buf)
 734                 return -ENOMEM;
 735
 736         put_unaligned_le32(val, buf);
 737
 738         pipe = usb_sndctrlpipe(data->udev, 0);
 739         err = usb_control_msg(data->udev, pipe, 0x02,
 740                               0x5E,
 741                               reg >> 16, reg & 0xffff,
 742                               buf, 4, USB_CTRL_SET_TIMEOUT);
 743         if (err < 0)
 744                 bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
 745
 746         kfree(buf);
 747
 748         return err;
 749 }
 750
 751 static int btmtk_usb_uhw_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
 752 {
 753         struct btmtk_data *data = hci_get_priv(hdev);
 754         int pipe, err;
 755         void *buf;
 756
 757         buf = kzalloc(4, GFP_KERNEL);
 758         if (!buf)
 759                 return -ENOMEM;
 760
 761         pipe = usb_rcvctrlpipe(data->udev, 0);
 762         err = usb_control_msg(data->udev, pipe, 0x01,
 763                               0xDE,
 764                               reg >> 16, reg & 0xffff,
 765                               buf, 4, USB_CTRL_GET_TIMEOUT);
 766         if (err < 0) {
 767                 bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
 768                 goto err_free_buf;
 769         }
 770
 771         *val = get_unaligned_le32(buf);
 772         bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
 773
 774 err_free_buf:
 775         kfree(buf);
 776
 777         return err;
 778 }
 779
 780 static int btmtk_usb_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
 781 {
 782         struct btmtk_data *data = hci_get_priv(hdev);
 783         int pipe, err, size = sizeof(u32);
 784         void *buf;
 785
 786         buf = kzalloc(size, GFP_KERNEL);
 787         if (!buf)
 788                 return -ENOMEM;
 789
 790         pipe = usb_rcvctrlpipe(data->udev, 0);
 791         err = usb_control_msg(data->udev, pipe, 0x63,
 792                               USB_TYPE_VENDOR | USB_DIR_IN,
 793                               reg >> 16, reg & 0xffff,
 794                               buf, size, USB_CTRL_GET_TIMEOUT);
 795         if (err < 0)
 796                 goto err_free_buf;
 797
 798         *val = get_unaligned_le32(buf);
 799
 800 err_free_buf:
 801         kfree(buf);
 802
 803         return err;
 804 }
 805
 806 static int btmtk_usb_id_get(struct hci_dev *hdev, u32 reg, u32 *id)
 807 {
 808         return btmtk_usb_reg_read(hdev, reg, id);
 809 }
 810
 811 static u32 btmtk_usb_reset_done(struct hci_dev *hdev)
 812 {
 813         u32 val = 0;
 814
 815         btmtk_usb_uhw_reg_read(hdev, MTK_BT_MISC, &val);
 816
 817         return val & MTK_BT_RST_DONE;
 818 }
 819
 820 int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
 821 {
 822         u32 val;
 823         int err;
 824
 825         if (dev_id == 0x7922) {
 826                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
 827                 if (err < 0)
 828                         return err;
 829                 val |= 0x00002020;
 830                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
 831                 if (err < 0)
 832                         return err;
 833                 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
 834                 if (err < 0)
 835                         return err;
 836                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
 837                 if (err < 0)
 838                         return err;
 839                 val |= BIT(0);
 840                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
 841                 if (err < 0)
 842                         return err;
 843                 msleep(100);
 844         } else if (dev_id == 0x7925) {
 845                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
 846                 if (err < 0)
 847                         return err;
 848                 val |= (1 << 5);
 849                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
 850                 if (err < 0)
 851                         return err;
 852                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
 853                 if (err < 0)
 854                         return err;
 855                 val &= 0xFFFF00FF;
 856                 val |= (1 << 13);
 857                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
 858                 if (err < 0)
 859                         return err;
 860                 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
 861                 if (err < 0)
 862                         return err;
 863                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
 864                 if (err < 0)
 865                         return err;
 866                 val |= (1 << 0);
 867                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
 868                 if (err < 0)
 869                         return err;
 870                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
 871                 if (err < 0)
 872                         return err;
 873                 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
 874                 if (err < 0)
 875                         return err;
 876                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
 877                 if (err < 0)
 878                         return err;
 879                 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
 880                 if (err < 0)
 881                         return err;
 882                 msleep(100);
 883         } else {
 884                 /* It's Device EndPoint Reset Option Register */
 885                 bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
 886                 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
 887                 if (err < 0)
 888                         return err;
 889                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_WDT_STATUS, &val);
 890                 if (err < 0)
 891                         return err;
 892                 /* Reset the bluetooth chip via USB interface. */
 893                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 1);
 894                 if (err < 0)
 895                         return err;
 896                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
 897                 if (err < 0)
 898                         return err;
 899                 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
 900                 if (err < 0)
 901                         return err;
 902                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
 903                 if (err < 0)
 904                         return err;
 905                 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
 906                 if (err < 0)
 907                         return err;
 908                 /* MT7921 need to delay 20ms between toggle reset bit */
 909                 msleep(20);
 910                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 0);
 911                 if (err < 0)
 912                         return err;
 913                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
 914                 if (err < 0)
 915                         return err;
 916         }
 917
 918         err = readx_poll_timeout(btmtk_usb_reset_done, hdev, val,
 919                                  val & MTK_BT_RST_DONE, 20000, 1000000);
 920         if (err < 0)
 921                 bt_dev_err(hdev, "Reset timeout");
 922
 923         if (dev_id == 0x7922) {
 924                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
 925                 if (err < 0)
 926                         return err;
 927         }
 928
 929         err = btmtk_usb_id_get(hdev, 0x70010200, &val);
 930         if (err < 0 || !val)
 931                 bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
 932
 933         return err;
 934 }
 935 EXPORT_SYMBOL_GPL(btmtk_usb_subsys_reset);
 936
 937 int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
 938 {
 939         struct btmtk_data *data = hci_get_priv(hdev);
 940         u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
 941
 942         switch (handle) {
 943         case 0xfc6f:            /* Firmware dump from device */
 944                 /* When the firmware hangs, the device can no longer
 945                  * suspend and thus disable auto-suspend.
 946                  */
 947                 usb_disable_autosuspend(data->udev);
 948
 949                 /* We need to forward the diagnostic packet to userspace daemon
 950                  * for backward compatibility, so we have to clone the packet
 951                  * extraly for the in-kernel coredump support.
 952                  */
 953                 if (IS_ENABLED(CONFIG_DEV_COREDUMP)) {
 954                         struct sk_buff *skb_cd = skb_clone(skb, GFP_ATOMIC);
 955
 956                         if (skb_cd)
 957                                 btmtk_process_coredump(hdev, skb_cd);
 958                 }
 959
 960                 fallthrough;
 961         case 0x05ff:            /* Firmware debug logging 1 */
 962         case 0x05fe:            /* Firmware debug logging 2 */
 963                 return hci_recv_diag(hdev, skb);
 964         }
 965
 966         return hci_recv_frame(hdev, skb);
 967 }
 968 EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl);
 969
 970 static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb)
 971 {
 972         if (skb->len > MTK_ISO_THRESHOLD)
 973                 return -EINVAL;
 974
 975         if (skb_pad(skb, MTK_ISO_THRESHOLD - skb->len))
 976                 return -ENOMEM;
 977
 978         __skb_put(skb, MTK_ISO_THRESHOLD - skb->len);
 979
 980         return 0;
 981 }
 982
 983 static int __set_mtk_intr_interface(struct hci_dev *hdev)
 984 {
 985         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
 986         struct usb_interface *intf = btmtk_data->isopkt_intf;
 987         int i, err;
 988
 989         if (!btmtk_data->isopkt_intf)
 990                 return -ENODEV;
 991
 992         err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM, 1);
 993         if (err < 0) {
 994                 bt_dev_err(hdev, "setting interface failed (%d)", -err);
 995                 return err;
 996         }
 997
 998         btmtk_data->isopkt_tx_ep = NULL;
 999         btmtk_data->isopkt_rx_ep = NULL;
1000
1001         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1002                 struct usb_endpoint_descriptor *ep_desc;
1003
1004                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1005
1006                 if (!btmtk_data->isopkt_tx_ep &&
1007                     usb_endpoint_is_int_out(ep_desc)) {
1008                         btmtk_data->isopkt_tx_ep = ep_desc;
1009                         continue;
1010                 }
1011
1012                 if (!btmtk_data->isopkt_rx_ep &&
1013                     usb_endpoint_is_int_in(ep_desc)) {
1014                         btmtk_data->isopkt_rx_ep = ep_desc;
1015                         continue;
1016                 }
1017         }
1018
1019         if (!btmtk_data->isopkt_tx_ep ||
1020             !btmtk_data->isopkt_rx_ep) {
1021                 bt_dev_err(hdev, "invalid interrupt descriptors");
1022                 return -ENODEV;
1023         }
1024
1025         return 0;
1026 }
1027
1028 struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
1029                                usb_complete_t tx_complete)
1030 {
1031         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1032         struct urb *urb;
1033         unsigned int pipe;
1034
1035         if (!btmtk_data->isopkt_tx_ep)
1036                 return ERR_PTR(-ENODEV);
1037
1038         urb = usb_alloc_urb(0, GFP_KERNEL);
1039         if (!urb)
1040                 return ERR_PTR(-ENOMEM);
1041
1042         if (btmtk_isopkt_pad(hdev, skb))
1043                 return ERR_PTR(-EINVAL);
1044
1045         pipe = usb_sndintpipe(btmtk_data->udev,
1046                               btmtk_data->isopkt_tx_ep->bEndpointAddress);
1047
1048         usb_fill_int_urb(urb, btmtk_data->udev, pipe,
1049                          skb->data, skb->len, tx_complete,
1050                          skb, btmtk_data->isopkt_tx_ep->bInterval);
1051
1052         skb->dev = (void *)hdev;
1053
1054         return urb;
1055 }
1056 EXPORT_SYMBOL_GPL(alloc_mtk_intr_urb);
1057
1058 static int btmtk_recv_isopkt(struct hci_dev *hdev, void *buffer, int count)
1059 {
1060         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1061         struct sk_buff *skb;
1062         unsigned long flags;
1063         int err = 0;
1064
1065         spin_lock_irqsave(&btmtk_data->isorxlock, flags);
1066         skb = btmtk_data->isopkt_skb;
1067
1068         while (count) {
1069                 int len;
1070
1071                 if (!skb) {
1072                         skb = bt_skb_alloc(HCI_MAX_ISO_SIZE, GFP_ATOMIC);
1073                         if (!skb) {
1074                                 err = -ENOMEM;
1075                                 break;
1076                         }
1077
1078                         hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
1079                         hci_skb_expect(skb) = HCI_ISO_HDR_SIZE;
1080                 }
1081
1082                 len = min_t(uint, hci_skb_expect(skb), count);
1083                 skb_put_data(skb, buffer, len);
1084
1085                 count -= len;
1086                 buffer += len;
1087                 hci_skb_expect(skb) -= len;
1088
1089                 if (skb->len == HCI_ISO_HDR_SIZE) {
1090                         __le16 dlen = ((struct hci_iso_hdr *)skb->data)->dlen;
1091
1092                         /* Complete ISO header */
1093                         hci_skb_expect(skb) = __le16_to_cpu(dlen);
1094
1095                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
1096                                 kfree_skb(skb);
1097                                 skb = NULL;
1098
1099                                 err = -EILSEQ;
1100                                 break;
1101                         }
1102                 }
1103
1104                 if (!hci_skb_expect(skb)) {
1105                         /* Complete frame */
1106                         hci_recv_frame(hdev, skb);
1107                         skb = NULL;
1108                 }
1109         }
1110
1111         btmtk_data->isopkt_skb = skb;
1112         spin_unlock_irqrestore(&btmtk_data->isorxlock, flags);
1113
1114         return err;
1115 }
1116
1117 static void btmtk_intr_complete(struct urb *urb)
1118 {
1119         struct hci_dev *hdev = urb->context;
1120         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1121         int err;
1122
1123         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1124                urb->actual_length);
1125
1126         if (!test_bit(HCI_RUNNING, &hdev->flags))
1127                 return;
1128
1129         if (hdev->suspended)
1130                 return;
1131
1132         if (urb->status == 0) {
1133                 hdev->stat.byte_rx += urb->actual_length;
1134
1135                 if (btmtk_recv_isopkt(hdev, urb->transfer_buffer,
1136                                       urb->actual_length) < 0) {
1137                         bt_dev_err(hdev, "corrupted iso packet");
1138                         hdev->stat.err_rx++;
1139                 }
1140         } else if (urb->status == -ENOENT) {
1141                 /* Avoid suspend failed when usb_kill_urb */
1142                 return;
1143         }
1144
1145         usb_mark_last_busy(btmtk_data->udev);
1146         usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
1147
1148         err = usb_submit_urb(urb, GFP_ATOMIC);
1149         if (err < 0) {
1150                 /* -EPERM: urb is being killed;
1151                  * -ENODEV: device got disconnected
1152                  */
1153                 if (err != -EPERM && err != -ENODEV)
1154                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1155                                    urb, -err);
1156                 if (err != -EPERM)
1157                         hci_cmd_sync_cancel(hdev, -err);
1158                 usb_unanchor_urb(urb);
1159         }
1160 }
1161
1162 static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
1163 {
1164         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1165         unsigned char *buf;
1166         unsigned int pipe;
1167         struct urb *urb;
1168         int err, size;
1169
1170         BT_DBG("%s", hdev->name);
1171
1172         if (!btmtk_data->isopkt_rx_ep)
1173                 return -ENODEV;
1174
1175         urb = usb_alloc_urb(0, mem_flags);
1176         if (!urb)
1177                 return -ENOMEM;
1178         size = le16_to_cpu(btmtk_data->isopkt_rx_ep->wMaxPacketSize);
1179
1180         buf = kmalloc(size, mem_flags);
1181         if (!buf) {
1182                 usb_free_urb(urb);
1183                 return -ENOMEM;
1184         }
1185
1186         pipe = usb_rcvintpipe(btmtk_data->udev,
1187                               btmtk_data->isopkt_rx_ep->bEndpointAddress);
1188
1189         usb_fill_int_urb(urb, btmtk_data->udev, pipe, buf, size,
1190                          btmtk_intr_complete, hdev,
1191                          btmtk_data->isopkt_rx_ep->bInterval);
1192
1193         urb->transfer_flags |= URB_FREE_BUFFER;
1194
1195         usb_mark_last_busy(btmtk_data->udev);
1196         usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
1197
1198         err = usb_submit_urb(urb, mem_flags);
1199         if (err < 0) {
1200                 if (err != -EPERM && err != -ENODEV)
1201                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1202                                    urb, -err);
1203                 usb_unanchor_urb(urb);
1204         }
1205
1206         usb_free_urb(urb);
1207
1208         return err;
1209 }
1210
1211 static int btmtk_usb_isointf_init(struct hci_dev *hdev)
1212 {
1213         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1214         u8 iso_param[2] = { 0x08, 0x01 };
1215         struct sk_buff *skb;
1216         int err;
1217
1218         init_usb_anchor(&btmtk_data->isopkt_anchor);
1219         spin_lock_init(&btmtk_data->isorxlock);
1220
1221         __set_mtk_intr_interface(hdev);
1222
1223         err = btmtk_submit_intr_urb(hdev, GFP_KERNEL);
1224         if (err < 0) {
1225                 usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
1226                 bt_dev_err(hdev, "ISO intf not support (%d)", err);
1227                 return err;
1228         }
1229
1230         skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), iso_param,
1231                              HCI_INIT_TIMEOUT);
1232         if (IS_ERR(skb)) {
1233                 bt_dev_err(hdev, "Failed to apply iso setting (%ld)", PTR_ERR(skb));
1234                 return PTR_ERR(skb);
1235         }
1236         kfree_skb(skb);
1237
1238         return 0;
1239 }
1240
1241 int btmtk_usb_resume(struct hci_dev *hdev)
1242 {
1243         /* This function describes the specific additional steps taken by MediaTek
1244          * when Bluetooth usb driver's resume function is called.
1245          */
1246         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1247
1248         /* Resubmit urb for iso data transmission */
1249         if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) {
1250                 if (btmtk_submit_intr_urb(hdev, GFP_NOIO) < 0)
1251                         clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
1252         }
1253
1254         return 0;
1255 }
1256 EXPORT_SYMBOL_GPL(btmtk_usb_resume);
1257
1258 int btmtk_usb_suspend(struct hci_dev *hdev)
1259 {
1260         /* This function describes the specific additional steps taken by MediaTek
1261          * when Bluetooth usb driver's suspend function is called.
1262          */
1263         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1264
1265         /* Stop urb anchor for iso data transmission */
1266         if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags))
1267                 usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
1268
1269         return 0;
1270 }
1271 EXPORT_SYMBOL_GPL(btmtk_usb_suspend);
1272
1273 int btmtk_usb_setup(struct hci_dev *hdev)
1274 {
1275         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1276         struct btmtk_hci_wmt_params wmt_params;
1277         ktime_t calltime, delta, rettime;
1278         struct btmtk_tci_sleep tci_sleep;
1279         unsigned long long duration;
1280         struct sk_buff *skb;
1281         const char *fwname;
1282         int err, status;
1283         u32 dev_id = 0;
1284         char fw_bin_name[64];
1285         u32 fw_version = 0, fw_flavor = 0;
1286         u8 param;
1287
1288         calltime = ktime_get();
1289
1290         err = btmtk_usb_id_get(hdev, 0x80000008, &dev_id);
1291         if (err < 0) {
1292                 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1293                 return err;
1294         }
1295
1296         if (!dev_id || dev_id != 0x7663) {
1297                 err = btmtk_usb_id_get(hdev, 0x70010200, &dev_id);
1298                 if (err < 0) {
1299                         bt_dev_err(hdev, "Failed to get device id (%d)", err);
1300                         return err;
1301                 }
1302                 err = btmtk_usb_id_get(hdev, 0x80021004, &fw_version);
1303                 if (err < 0) {
1304                         bt_dev_err(hdev, "Failed to get fw version (%d)", err);
1305                         return err;
1306                 }
1307                 err = btmtk_usb_id_get(hdev, 0x70010020, &fw_flavor);
1308                 if (err < 0) {
1309                         bt_dev_err(hdev, "Failed to get fw flavor (%d)", err);
1310                         return err;
1311                 }
1312                 fw_flavor = (fw_flavor & 0x00000080) >> 7;
1313         }
1314
1315         btmtk_data->dev_id = dev_id;
1316
1317         err = btmtk_register_coredump(hdev, btmtk_data->drv_name, fw_version);
1318         if (err < 0)
1319                 bt_dev_err(hdev, "Failed to register coredump (%d)", err);
1320
1321         switch (dev_id) {
1322         case 0x7663:
1323                 fwname = FIRMWARE_MT7663;
1324                 break;
1325         case 0x7668:
1326                 fwname = FIRMWARE_MT7668;
1327                 break;
1328         case 0x7922:
1329         case 0x7961:
1330         case 0x7925:
1331                 /* Reset the device to ensure it's in the initial state before
1332                  * downloading the firmware to ensure.
1333                  */
1334
1335                 if (!test_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags))
1336                         btmtk_usb_subsys_reset(hdev, dev_id);
1337
1338                 btmtk_fw_get_filename(fw_bin_name, sizeof(fw_bin_name), dev_id,
1339                                       fw_version, fw_flavor);
1340
1341                 err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
1342                                                 btmtk_usb_hci_wmt_sync);
1343                 if (err < 0) {
1344                         bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
1345                         clear_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags);
1346                         return err;
1347                 }
1348
1349                 set_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags);
1350
1351                 /* It's Device EndPoint Reset Option Register */
1352                 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT,
1353                                               MTK_EP_RST_IN_OUT_OPT);
1354                 if (err < 0)
1355                         return err;
1356
1357                 /* Enable Bluetooth protocol */
1358                 param = 1;
1359                 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1360                 wmt_params.flag = 0;
1361                 wmt_params.dlen = sizeof(param);
1362                 wmt_params.data = &param;
1363                 wmt_params.status = NULL;
1364
1365                 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1366                 if (err < 0) {
1367                         bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1368                         return err;
1369                 }
1370
1371                 hci_set_msft_opcode(hdev, 0xFD30);
1372                 hci_set_aosp_capable(hdev);
1373
1374                 /* Set up ISO interface after protocol enabled */
1375                 if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) {
1376                         if (!btmtk_usb_isointf_init(hdev))
1377                                 set_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
1378                 }
1379
1380                 goto done;
1381         default:
1382                 bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
1383                            dev_id);
1384                 return -ENODEV;
1385         }
1386
1387         /* Query whether the firmware is already download */
1388         wmt_params.op = BTMTK_WMT_SEMAPHORE;
1389         wmt_params.flag = 1;
1390         wmt_params.dlen = 0;
1391         wmt_params.data = NULL;
1392         wmt_params.status = &status;
1393
1394         err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1395         if (err < 0) {
1396                 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
1397                 return err;
1398         }
1399
1400         if (status == BTMTK_WMT_PATCH_DONE) {
1401                 bt_dev_info(hdev, "firmware already downloaded");
1402                 goto ignore_setup_fw;
1403         }
1404
1405         /* Setup a firmware which the device definitely requires */
1406         err = btmtk_setup_firmware(hdev, fwname,
1407                                    btmtk_usb_hci_wmt_sync);
1408         if (err < 0)
1409                 return err;
1410
1411 ignore_setup_fw:
1412         err = readx_poll_timeout(btmtk_usb_func_query, hdev, status,
1413                                  status < 0 || status != BTMTK_WMT_ON_PROGRESS,
1414                                  2000, 5000000);
1415         /* -ETIMEDOUT happens */
1416         if (err < 0)
1417                 return err;
1418
1419         /* The other errors happen in btmtk_usb_func_query */
1420         if (status < 0)
1421                 return status;
1422
1423         if (status == BTMTK_WMT_ON_DONE) {
1424                 bt_dev_info(hdev, "function already on");
1425                 goto ignore_func_on;
1426         }
1427
1428         /* Enable Bluetooth protocol */
1429         param = 1;
1430         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1431         wmt_params.flag = 0;
1432         wmt_params.dlen = sizeof(param);
1433         wmt_params.data = &param;
1434         wmt_params.status = NULL;
1435
1436         err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1437         if (err < 0) {
1438                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1439                 return err;
1440         }
1441
1442 ignore_func_on:
1443         /* Apply the low power environment setup */
1444         tci_sleep.mode = 0x5;
1445         tci_sleep.duration = cpu_to_le16(0x640);
1446         tci_sleep.host_duration = cpu_to_le16(0x640);
1447         tci_sleep.host_wakeup_pin = 0;
1448         tci_sleep.time_compensation = 0;
1449
1450         skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
1451                              HCI_INIT_TIMEOUT);
1452         if (IS_ERR(skb)) {
1453                 err = PTR_ERR(skb);
1454                 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
1455                 return err;
1456         }
1457         kfree_skb(skb);
1458
1459 done:
1460         rettime = ktime_get();
1461         delta = ktime_sub(rettime, calltime);
1462         duration = (unsigned long long)ktime_to_ns(delta) >> 10;
1463
1464         bt_dev_info(hdev, "Device setup in %llu usecs", duration);
1465
1466         return 0;
1467 }
1468 EXPORT_SYMBOL_GPL(btmtk_usb_setup);
1469
1470 int btmtk_usb_shutdown(struct hci_dev *hdev)
1471 {
1472         struct btmtk_hci_wmt_params wmt_params;
1473         u8 param = 0;
1474         int err;
1475
1476         /* Disable the device */
1477         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1478         wmt_params.flag = 0;
1479         wmt_params.dlen = sizeof(param);
1480         wmt_params.data = &param;
1481         wmt_params.status = NULL;
1482
1483         err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1484         if (err < 0) {
1485                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1486                 return err;
1487         }
1488
1489         return 0;
1490 }
1491 EXPORT_SYMBOL_GPL(btmtk_usb_shutdown);
1492 #endif
1493
1494 MODULE_AUTHOR("Sean Wang <[email protected]>");
1495 MODULE_AUTHOR("Mark Chen <[email protected]>");
1496 MODULE_DESCRIPTION("Bluetooth support for MediaTek devices ver " VERSION);
1497 MODULE_VERSION(VERSION);
1498 MODULE_LICENSE("GPL");
1499 MODULE_FIRMWARE(FIRMWARE_MT7622);
1500 MODULE_FIRMWARE(FIRMWARE_MT7663);
1501 MODULE_FIRMWARE(FIRMWARE_MT7668);
1502 MODULE_FIRMWARE(FIRMWARE_MT7922);
1503 MODULE_FIRMWARE(FIRMWARE_MT7961);
1504 MODULE_FIRMWARE(FIRMWARE_MT7925);