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 static void btmtk_usb_wmt_recv(struct urb *urb)
 441 {
 442         struct hci_dev *hdev = urb->context;
 443         struct btmtk_data *data = hci_get_priv(hdev);
 444         struct sk_buff *skb;
 445         int err;
 446
 447         if (urb->status == 0 && urb->actual_length > 0) {
 448                 hdev->stat.byte_rx += urb->actual_length;
 449
 450                 /* WMT event shouldn't be fragmented and the size should be
 451                  * less than HCI_WMT_MAX_EVENT_SIZE.
 452                  */
 453                 skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
 454                 if (!skb) {
 455                         hdev->stat.err_rx++;
 456                         kfree(urb->setup_packet);
 457                         return;
 458                 }
 459
 460                 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
 461                 skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
 462
 463                 /* When someone waits for the WMT event, the skb is being cloned
 464                  * and being processed the events from there then.
 465                  */
 466                 if (test_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags)) {
 467                         data->evt_skb = skb_clone(skb, GFP_ATOMIC);
 468                         if (!data->evt_skb) {
 469                                 kfree_skb(skb);
 470                                 kfree(urb->setup_packet);
 471                                 return;
 472                         }
 473                 }
 474
 475                 err = hci_recv_frame(hdev, skb);
 476                 if (err < 0) {
 477                         kfree_skb(data->evt_skb);
 478                         data->evt_skb = NULL;
 479                         kfree(urb->setup_packet);
 480                         return;
 481                 }
 482
 483                 if (test_and_clear_bit(BTMTK_TX_WAIT_VND_EVT,
 484                                        &data->flags)) {
 485                         /* Barrier to sync with other CPUs */
 486                         smp_mb__after_atomic();
 487                         wake_up_bit(&data->flags,
 488                                     BTMTK_TX_WAIT_VND_EVT);
 489                 }
 490                 kfree(urb->setup_packet);
 491                 return;
 492         } else if (urb->status == -ENOENT) {
 493                 /* Avoid suspend failed when usb_kill_urb */
 494                 return;
 495         }
 496
 497         usb_mark_last_busy(data->udev);
 498
 499         /* The URB complete handler is still called with urb->actual_length = 0
 500          * when the event is not available, so we should keep re-submitting
 501          * URB until WMT event returns, Also, It's necessary to wait some time
 502          * between the two consecutive control URBs to relax the target device
 503          * to generate the event. Otherwise, the WMT event cannot return from
 504          * the device successfully.
 505          */
 506         udelay(500);
 507
 508         usb_anchor_urb(urb, data->ctrl_anchor);
 509         err = usb_submit_urb(urb, GFP_ATOMIC);
 510         if (err < 0) {
 511                 kfree(urb->setup_packet);
 512                 /* -EPERM: urb is being killed;
 513                  * -ENODEV: device got disconnected
 514                  */
 515                 if (err != -EPERM && err != -ENODEV)
 516                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
 517                                    urb, -err);
 518                 usb_unanchor_urb(urb);
 519         }
 520 }
 521
 522 static int btmtk_usb_submit_wmt_recv_urb(struct hci_dev *hdev)
 523 {
 524         struct btmtk_data *data = hci_get_priv(hdev);
 525         struct usb_ctrlrequest *dr;
 526         unsigned char *buf;
 527         int err, size = 64;
 528         unsigned int pipe;
 529         struct urb *urb;
 530
 531         urb = usb_alloc_urb(0, GFP_KERNEL);
 532         if (!urb)
 533                 return -ENOMEM;
 534
 535         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
 536         if (!dr) {
 537                 usb_free_urb(urb);
 538                 return -ENOMEM;
 539         }
 540
 541         dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
 542         dr->bRequest     = 1;
 543         dr->wIndex       = cpu_to_le16(0);
 544         dr->wValue       = cpu_to_le16(48);
 545         dr->wLength      = cpu_to_le16(size);
 546
 547         buf = kmalloc(size, GFP_KERNEL);
 548         if (!buf) {
 549                 kfree(dr);
 550                 usb_free_urb(urb);
 551                 return -ENOMEM;
 552         }
 553
 554         pipe = usb_rcvctrlpipe(data->udev, 0);
 555
 556         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
 557                              buf, size, btmtk_usb_wmt_recv, hdev);
 558
 559         urb->transfer_flags |= URB_FREE_BUFFER;
 560
 561         usb_anchor_urb(urb, data->ctrl_anchor);
 562         err = usb_submit_urb(urb, GFP_KERNEL);
 563         if (err < 0) {
 564                 if (err != -EPERM && err != -ENODEV)
 565                         bt_dev_err(hdev, "urb %p submission failed (%d)",
 566                                    urb, -err);
 567                 usb_unanchor_urb(urb);
 568         }
 569
 570         usb_free_urb(urb);
 571
 572         return err;
 573 }
 574
 575 static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
 576                                   struct btmtk_hci_wmt_params *wmt_params)
 577 {
 578         struct btmtk_data *data = hci_get_priv(hdev);
 579         struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
 580         u32 hlen, status = BTMTK_WMT_INVALID;
 581         struct btmtk_hci_wmt_evt *wmt_evt;
 582         struct btmtk_hci_wmt_cmd *wc;
 583         struct btmtk_wmt_hdr *hdr;
 584         int err;
 585
 586         /* Send the WMT command and wait until the WMT event returns */
 587         hlen = sizeof(*hdr) + wmt_params->dlen;
 588         if (hlen > 255)
 589                 return -EINVAL;
 590
 591         wc = kzalloc(hlen, GFP_KERNEL);
 592         if (!wc)
 593                 return -ENOMEM;
 594
 595         hdr = &wc->hdr;
 596         hdr->dir = 1;
 597         hdr->op = wmt_params->op;
 598         hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
 599         hdr->flag = wmt_params->flag;
 600         memcpy(wc->data, wmt_params->data, wmt_params->dlen);
 601
 602         set_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
 603
 604         /* WMT cmd/event doesn't follow up the generic HCI cmd/event handling,
 605          * it needs constantly polling control pipe until the host received the
 606          * WMT event, thus, we should require to specifically acquire PM counter
 607          * on the USB to prevent the interface from entering auto suspended
 608          * while WMT cmd/event in progress.
 609          */
 610         err = usb_autopm_get_interface(data->intf);
 611         if (err < 0)
 612                 goto err_free_wc;
 613
 614         err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
 615
 616         if (err < 0) {
 617                 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
 618                 usb_autopm_put_interface(data->intf);
 619                 goto err_free_wc;
 620         }
 621
 622         /* Submit control IN URB on demand to process the WMT event */
 623         err = btmtk_usb_submit_wmt_recv_urb(hdev);
 624
 625         usb_autopm_put_interface(data->intf);
 626
 627         if (err < 0)
 628                 goto err_free_wc;
 629
 630         /* The vendor specific WMT commands are all answered by a vendor
 631          * specific event and will have the Command Status or Command
 632          * Complete as with usual HCI command flow control.
 633          *
 634          * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
 635          * state to be cleared. The driver specific event receive routine
 636          * will clear that state and with that indicate completion of the
 637          * WMT command.
 638          */
 639         err = wait_on_bit_timeout(&data->flags, BTMTK_TX_WAIT_VND_EVT,
 640                                   TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
 641         if (err == -EINTR) {
 642                 bt_dev_err(hdev, "Execution of wmt command interrupted");
 643                 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
 644                 goto err_free_wc;
 645         }
 646
 647         if (err) {
 648                 bt_dev_err(hdev, "Execution of wmt command timed out");
 649                 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
 650                 err = -ETIMEDOUT;
 651                 goto err_free_wc;
 652         }
 653
 654         if (data->evt_skb == NULL)
 655                 goto err_free_wc;
 656
 657         /* Parse and handle the return WMT event */
 658         wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
 659         if (wmt_evt->whdr.op != hdr->op) {
 660                 bt_dev_err(hdev, "Wrong op received %d expected %d",
 661                            wmt_evt->whdr.op, hdr->op);
 662                 err = -EIO;
 663                 goto err_free_skb;
 664         }
 665
 666         switch (wmt_evt->whdr.op) {
 667         case BTMTK_WMT_SEMAPHORE:
 668                 if (wmt_evt->whdr.flag == 2)
 669                         status = BTMTK_WMT_PATCH_UNDONE;
 670                 else
 671                         status = BTMTK_WMT_PATCH_DONE;
 672                 break;
 673         case BTMTK_WMT_FUNC_CTRL:
 674                 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
 675                 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
 676                         status = BTMTK_WMT_ON_DONE;
 677                 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
 678                         status = BTMTK_WMT_ON_PROGRESS;
 679                 else
 680                         status = BTMTK_WMT_ON_UNDONE;
 681                 break;
 682         case BTMTK_WMT_PATCH_DWNLD:
 683                 if (wmt_evt->whdr.flag == 2)
 684                         status = BTMTK_WMT_PATCH_DONE;
 685                 else if (wmt_evt->whdr.flag == 1)
 686                         status = BTMTK_WMT_PATCH_PROGRESS;
 687                 else
 688                         status = BTMTK_WMT_PATCH_UNDONE;
 689                 break;
 690         }
 691
 692         if (wmt_params->status)
 693                 *wmt_params->status = status;
 694
 695 err_free_skb:
 696         kfree_skb(data->evt_skb);
 697         data->evt_skb = NULL;
 698 err_free_wc:
 699         kfree(wc);
 700         return err;
 701 }
 702
 703 static int btmtk_usb_func_query(struct hci_dev *hdev)
 704 {
 705         struct btmtk_hci_wmt_params wmt_params;
 706         int status, err;
 707         u8 param = 0;
 708
 709         /* Query whether the function is enabled */
 710         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
 711         wmt_params.flag = 4;
 712         wmt_params.dlen = sizeof(param);
 713         wmt_params.data = &param;
 714         wmt_params.status = &status;
 715
 716         err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
 717         if (err < 0) {
 718                 bt_dev_err(hdev, "Failed to query function status (%d)", err);
 719                 return err;
 720         }
 721
 722         return status;
 723 }
 724
 725 static int btmtk_usb_uhw_reg_write(struct hci_dev *hdev, u32 reg, u32 val)
 726 {
 727         struct btmtk_data *data = hci_get_priv(hdev);
 728         int pipe, err;
 729         void *buf;
 730
 731         buf = kzalloc(4, GFP_KERNEL);
 732         if (!buf)
 733                 return -ENOMEM;
 734
 735         put_unaligned_le32(val, buf);
 736
 737         pipe = usb_sndctrlpipe(data->udev, 0);
 738         err = usb_control_msg(data->udev, pipe, 0x02,
 739                               0x5E,
 740                               reg >> 16, reg & 0xffff,
 741                               buf, 4, USB_CTRL_SET_TIMEOUT);
 742         if (err < 0)
 743                 bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
 744
 745         kfree(buf);
 746
 747         return err;
 748 }
 749
 750 static int btmtk_usb_uhw_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
 751 {
 752         struct btmtk_data *data = hci_get_priv(hdev);
 753         int pipe, err;
 754         void *buf;
 755
 756         buf = kzalloc(4, GFP_KERNEL);
 757         if (!buf)
 758                 return -ENOMEM;
 759
 760         pipe = usb_rcvctrlpipe(data->udev, 0);
 761         err = usb_control_msg(data->udev, pipe, 0x01,
 762                               0xDE,
 763                               reg >> 16, reg & 0xffff,
 764                               buf, 4, USB_CTRL_GET_TIMEOUT);
 765         if (err < 0) {
 766                 bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
 767                 goto err_free_buf;
 768         }
 769
 770         *val = get_unaligned_le32(buf);
 771         bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
 772
 773 err_free_buf:
 774         kfree(buf);
 775
 776         return err;
 777 }
 778
 779 static int btmtk_usb_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
 780 {
 781         struct btmtk_data *data = hci_get_priv(hdev);
 782         int pipe, err, size = sizeof(u32);
 783         void *buf;
 784
 785         buf = kzalloc(size, GFP_KERNEL);
 786         if (!buf)
 787                 return -ENOMEM;
 788
 789         pipe = usb_rcvctrlpipe(data->udev, 0);
 790         err = usb_control_msg(data->udev, pipe, 0x63,
 791                               USB_TYPE_VENDOR | USB_DIR_IN,
 792                               reg >> 16, reg & 0xffff,
 793                               buf, size, USB_CTRL_GET_TIMEOUT);
 794         if (err < 0)
 795                 goto err_free_buf;
 796
 797         *val = get_unaligned_le32(buf);
 798
 799 err_free_buf:
 800         kfree(buf);
 801
 802         return err;
 803 }
 804
 805 static int btmtk_usb_id_get(struct hci_dev *hdev, u32 reg, u32 *id)
 806 {
 807         return btmtk_usb_reg_read(hdev, reg, id);
 808 }
 809
 810 static u32 btmtk_usb_reset_done(struct hci_dev *hdev)
 811 {
 812         u32 val = 0;
 813
 814         btmtk_usb_uhw_reg_read(hdev, MTK_BT_MISC, &val);
 815
 816         return val & MTK_BT_RST_DONE;
 817 }
 818
 819 int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
 820 {
 821         u32 val;
 822         int err;
 823
 824         if (dev_id == 0x7922) {
 825                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
 826                 if (err < 0)
 827                         return err;
 828                 val |= 0x00002020;
 829                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
 830                 if (err < 0)
 831                         return err;
 832                 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
 833                 if (err < 0)
 834                         return err;
 835                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
 836                 if (err < 0)
 837                         return err;
 838                 val |= BIT(0);
 839                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
 840                 if (err < 0)
 841                         return err;
 842                 msleep(100);
 843         } else if (dev_id == 0x7925) {
 844                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
 845                 if (err < 0)
 846                         return err;
 847                 val |= (1 << 5);
 848                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
 849                 if (err < 0)
 850                         return err;
 851                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
 852                 if (err < 0)
 853                         return err;
 854                 val &= 0xFFFF00FF;
 855                 val |= (1 << 13);
 856                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
 857                 if (err < 0)
 858                         return err;
 859                 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
 860                 if (err < 0)
 861                         return err;
 862                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
 863                 if (err < 0)
 864                         return err;
 865                 val |= (1 << 0);
 866                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
 867                 if (err < 0)
 868                         return err;
 869                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
 870                 if (err < 0)
 871                         return err;
 872                 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
 873                 if (err < 0)
 874                         return err;
 875                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
 876                 if (err < 0)
 877                         return err;
 878                 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
 879                 if (err < 0)
 880                         return err;
 881                 msleep(100);
 882         } else {
 883                 /* It's Device EndPoint Reset Option Register */
 884                 bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
 885                 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
 886                 if (err < 0)
 887                         return err;
 888                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_WDT_STATUS, &val);
 889                 if (err < 0)
 890                         return err;
 891                 /* Reset the bluetooth chip via USB interface. */
 892                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 1);
 893                 if (err < 0)
 894                         return err;
 895                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
 896                 if (err < 0)
 897                         return err;
 898                 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
 899                 if (err < 0)
 900                         return err;
 901                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
 902                 if (err < 0)
 903                         return err;
 904                 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
 905                 if (err < 0)
 906                         return err;
 907                 /* MT7921 need to delay 20ms between toggle reset bit */
 908                 msleep(20);
 909                 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 0);
 910                 if (err < 0)
 911                         return err;
 912                 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
 913                 if (err < 0)
 914                         return err;
 915         }
 916
 917         err = readx_poll_timeout(btmtk_usb_reset_done, hdev, val,
 918                                  val & MTK_BT_RST_DONE, 20000, 1000000);
 919         if (err < 0)
 920                 bt_dev_err(hdev, "Reset timeout");
 921
 922         if (dev_id == 0x7922) {
 923                 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
 924                 if (err < 0)
 925                         return err;
 926         }
 927
 928         err = btmtk_usb_id_get(hdev, 0x70010200, &val);
 929         if (err < 0 || !val)
 930                 bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
 931
 932         return err;
 933 }
 934 EXPORT_SYMBOL_GPL(btmtk_usb_subsys_reset);
 935
 936 int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
 937 {
 938         struct btmtk_data *data = hci_get_priv(hdev);
 939         u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
 940
 941         switch (handle) {
 942         case 0xfc6f:            /* Firmware dump from device */
 943                 /* When the firmware hangs, the device can no longer
 944                  * suspend and thus disable auto-suspend.
 945                  */
 946                 usb_disable_autosuspend(data->udev);
 947
 948                 /* We need to forward the diagnostic packet to userspace daemon
 949                  * for backward compatibility, so we have to clone the packet
 950                  * extraly for the in-kernel coredump support.
 951                  */
 952                 if (IS_ENABLED(CONFIG_DEV_COREDUMP)) {
 953                         struct sk_buff *skb_cd = skb_clone(skb, GFP_ATOMIC);
 954
 955                         if (skb_cd)
 956                                 btmtk_process_coredump(hdev, skb_cd);
 957                 }
 958
 959                 fallthrough;
 960         case 0x05ff:            /* Firmware debug logging 1 */
 961         case 0x05fe:            /* Firmware debug logging 2 */
 962                 return hci_recv_diag(hdev, skb);
 963         }
 964
 965         return hci_recv_frame(hdev, skb);
 966 }
 967 EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl);
 968
 969 static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb)
 970 {
 971         if (skb->len > MTK_ISO_THRESHOLD)
 972                 return -EINVAL;
 973
 974         if (skb_pad(skb, MTK_ISO_THRESHOLD - skb->len))
 975                 return -ENOMEM;
 976
 977         __skb_put(skb, MTK_ISO_THRESHOLD - skb->len);
 978
 979         return 0;
 980 }
 981
 982 static int __set_mtk_intr_interface(struct hci_dev *hdev)
 983 {
 984         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
 985         struct usb_interface *intf = btmtk_data->isopkt_intf;
 986         int i, err;
 987
 988         if (!btmtk_data->isopkt_intf)
 989                 return -ENODEV;
 990
 991         err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM, 1);
 992         if (err < 0) {
 993                 bt_dev_err(hdev, "setting interface failed (%d)", -err);
 994                 return err;
 995         }
 996
 997         btmtk_data->isopkt_tx_ep = NULL;
 998         btmtk_data->isopkt_rx_ep = NULL;
 999
1000         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1001                 struct usb_endpoint_descriptor *ep_desc;
1002
1003                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1004
1005                 if (!btmtk_data->isopkt_tx_ep &&
1006                     usb_endpoint_is_int_out(ep_desc)) {
1007                         btmtk_data->isopkt_tx_ep = ep_desc;
1008                         continue;
1009                 }
1010
1011                 if (!btmtk_data->isopkt_rx_ep &&
1012                     usb_endpoint_is_int_in(ep_desc)) {
1013                         btmtk_data->isopkt_rx_ep = ep_desc;
1014                         continue;
1015                 }
1016         }
1017
1018         if (!btmtk_data->isopkt_tx_ep ||
1019             !btmtk_data->isopkt_rx_ep) {
1020                 bt_dev_err(hdev, "invalid interrupt descriptors");
1021                 return -ENODEV;
1022         }
1023
1024         return 0;
1025 }
1026
1027 struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
1028                                usb_complete_t tx_complete)
1029 {
1030         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1031         struct urb *urb;
1032         unsigned int pipe;
1033
1034         if (!btmtk_data->isopkt_tx_ep)
1035                 return ERR_PTR(-ENODEV);
1036
1037         urb = usb_alloc_urb(0, GFP_KERNEL);
1038         if (!urb)
1039                 return ERR_PTR(-ENOMEM);
1040
1041         if (btmtk_isopkt_pad(hdev, skb))
1042                 return ERR_PTR(-EINVAL);
1043
1044         pipe = usb_sndintpipe(btmtk_data->udev,
1045                               btmtk_data->isopkt_tx_ep->bEndpointAddress);
1046
1047         usb_fill_int_urb(urb, btmtk_data->udev, pipe,
1048                          skb->data, skb->len, tx_complete,
1049                          skb, btmtk_data->isopkt_tx_ep->bInterval);
1050
1051         skb->dev = (void *)hdev;
1052
1053         return urb;
1054 }
1055 EXPORT_SYMBOL_GPL(alloc_mtk_intr_urb);
1056
1057 static int btmtk_recv_isopkt(struct hci_dev *hdev, void *buffer, int count)
1058 {
1059         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1060         struct sk_buff *skb;
1061         unsigned long flags;
1062         int err = 0;
1063
1064         spin_lock_irqsave(&btmtk_data->isorxlock, flags);
1065         skb = btmtk_data->isopkt_skb;
1066
1067         while (count) {
1068                 int len;
1069
1070                 if (!skb) {
1071                         skb = bt_skb_alloc(HCI_MAX_ISO_SIZE, GFP_ATOMIC);
1072                         if (!skb) {
1073                                 err = -ENOMEM;
1074                                 break;
1075                         }
1076
1077                         hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
1078                         hci_skb_expect(skb) = HCI_ISO_HDR_SIZE;
1079                 }
1080
1081                 len = min_t(uint, hci_skb_expect(skb), count);
1082                 skb_put_data(skb, buffer, len);
1083
1084                 count -= len;
1085                 buffer += len;
1086                 hci_skb_expect(skb) -= len;
1087
1088                 if (skb->len == HCI_ISO_HDR_SIZE) {
1089                         __le16 dlen = ((struct hci_iso_hdr *)skb->data)->dlen;
1090
1091                         /* Complete ISO header */
1092                         hci_skb_expect(skb) = __le16_to_cpu(dlen);
1093
1094                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
1095                                 kfree_skb(skb);
1096                                 skb = NULL;
1097
1098                                 err = -EILSEQ;
1099                                 break;
1100                         }
1101                 }
1102
1103                 if (!hci_skb_expect(skb)) {
1104                         /* Complete frame */
1105                         hci_recv_frame(hdev, skb);
1106                         skb = NULL;
1107                 }
1108         }
1109
1110         btmtk_data->isopkt_skb = skb;
1111         spin_unlock_irqrestore(&btmtk_data->isorxlock, flags);
1112
1113         return err;
1114 }
1115
1116 static void btmtk_intr_complete(struct urb *urb)
1117 {
1118         struct hci_dev *hdev = urb->context;
1119         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1120         int err;
1121
1122         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1123                urb->actual_length);
1124
1125         if (!test_bit(HCI_RUNNING, &hdev->flags))
1126                 return;
1127
1128         if (hdev->suspended)
1129                 return;
1130
1131         if (urb->status == 0) {
1132                 hdev->stat.byte_rx += urb->actual_length;
1133
1134                 if (btmtk_recv_isopkt(hdev, urb->transfer_buffer,
1135                                       urb->actual_length) < 0) {
1136                         bt_dev_err(hdev, "corrupted iso packet");
1137                         hdev->stat.err_rx++;
1138                 }
1139         } else if (urb->status == -ENOENT) {
1140                 /* Avoid suspend failed when usb_kill_urb */
1141                 return;
1142         }
1143
1144         usb_mark_last_busy(btmtk_data->udev);
1145         usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
1146
1147         err = usb_submit_urb(urb, GFP_ATOMIC);
1148         if (err < 0) {
1149                 /* -EPERM: urb is being killed;
1150                  * -ENODEV: device got disconnected
1151                  */
1152                 if (err != -EPERM && err != -ENODEV)
1153                         bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
1154                                    urb, -err);
1155                 if (err != -EPERM)
1156                         hci_cmd_sync_cancel(hdev, -err);
1157                 usb_unanchor_urb(urb);
1158         }
1159 }
1160
1161 static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
1162 {
1163         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1164         unsigned char *buf;
1165         unsigned int pipe;
1166         struct urb *urb;
1167         int err, size;
1168
1169         BT_DBG("%s", hdev->name);
1170
1171         if (!btmtk_data->isopkt_rx_ep)
1172                 return -ENODEV;
1173
1174         urb = usb_alloc_urb(0, mem_flags);
1175         if (!urb)
1176                 return -ENOMEM;
1177         size = le16_to_cpu(btmtk_data->isopkt_rx_ep->wMaxPacketSize);
1178
1179         buf = kmalloc(size, mem_flags);
1180         if (!buf) {
1181                 usb_free_urb(urb);
1182                 return -ENOMEM;
1183         }
1184
1185         pipe = usb_rcvintpipe(btmtk_data->udev,
1186                               btmtk_data->isopkt_rx_ep->bEndpointAddress);
1187
1188         usb_fill_int_urb(urb, btmtk_data->udev, pipe, buf, size,
1189                          btmtk_intr_complete, hdev,
1190                          btmtk_data->isopkt_rx_ep->bInterval);
1191
1192         urb->transfer_flags |= URB_FREE_BUFFER;
1193
1194         usb_mark_last_busy(btmtk_data->udev);
1195         usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
1196
1197         err = usb_submit_urb(urb, mem_flags);
1198         if (err < 0) {
1199                 if (err != -EPERM && err != -ENODEV)
1200                         bt_dev_err(hdev, "urb %p submission failed (%d)",
1201                                    urb, -err);
1202                 usb_unanchor_urb(urb);
1203         }
1204
1205         usb_free_urb(urb);
1206
1207         return err;
1208 }
1209
1210 static int btmtk_usb_isointf_init(struct hci_dev *hdev)
1211 {
1212         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1213         u8 iso_param[2] = { 0x08, 0x01 };
1214         struct sk_buff *skb;
1215         int err;
1216
1217         init_usb_anchor(&btmtk_data->isopkt_anchor);
1218         spin_lock_init(&btmtk_data->isorxlock);
1219
1220         __set_mtk_intr_interface(hdev);
1221
1222         err = btmtk_submit_intr_urb(hdev, GFP_KERNEL);
1223         if (err < 0) {
1224                 usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
1225                 bt_dev_err(hdev, "ISO intf not support (%d)", err);
1226                 return err;
1227         }
1228
1229         skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), iso_param,
1230                              HCI_INIT_TIMEOUT);
1231         if (IS_ERR(skb)) {
1232                 bt_dev_err(hdev, "Failed to apply iso setting (%ld)", PTR_ERR(skb));
1233                 return PTR_ERR(skb);
1234         }
1235         kfree_skb(skb);
1236
1237         return 0;
1238 }
1239
1240 int btmtk_usb_resume(struct hci_dev *hdev)
1241 {
1242         /* This function describes the specific additional steps taken by MediaTek
1243          * when Bluetooth usb driver's resume function is called.
1244          */
1245         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1246
1247         /* Resubmit urb for iso data transmission */
1248         if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) {
1249                 if (btmtk_submit_intr_urb(hdev, GFP_NOIO) < 0)
1250                         clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
1251         }
1252
1253         return 0;
1254 }
1255 EXPORT_SYMBOL_GPL(btmtk_usb_resume);
1256
1257 int btmtk_usb_suspend(struct hci_dev *hdev)
1258 {
1259         /* This function describes the specific additional steps taken by MediaTek
1260          * when Bluetooth usb driver's suspend function is called.
1261          */
1262         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1263
1264         /* Stop urb anchor for iso data transmission */
1265         usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
1266
1267         return 0;
1268 }
1269 EXPORT_SYMBOL_GPL(btmtk_usb_suspend);
1270
1271 int btmtk_usb_setup(struct hci_dev *hdev)
1272 {
1273         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
1274         struct btmtk_hci_wmt_params wmt_params;
1275         ktime_t calltime, delta, rettime;
1276         struct btmtk_tci_sleep tci_sleep;
1277         unsigned long long duration;
1278         struct sk_buff *skb;
1279         const char *fwname;
1280         int err, status;
1281         u32 dev_id = 0;
1282         char fw_bin_name[64];
1283         u32 fw_version = 0, fw_flavor = 0;
1284         u8 param;
1285
1286         calltime = ktime_get();
1287
1288         err = btmtk_usb_id_get(hdev, 0x80000008, &dev_id);
1289         if (err < 0) {
1290                 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1291                 return err;
1292         }
1293
1294         if (!dev_id || dev_id != 0x7663) {
1295                 err = btmtk_usb_id_get(hdev, 0x70010200, &dev_id);
1296                 if (err < 0) {
1297                         bt_dev_err(hdev, "Failed to get device id (%d)", err);
1298                         return err;
1299                 }
1300                 err = btmtk_usb_id_get(hdev, 0x80021004, &fw_version);
1301                 if (err < 0) {
1302                         bt_dev_err(hdev, "Failed to get fw version (%d)", err);
1303                         return err;
1304                 }
1305                 err = btmtk_usb_id_get(hdev, 0x70010020, &fw_flavor);
1306                 if (err < 0) {
1307                         bt_dev_err(hdev, "Failed to get fw flavor (%d)", err);
1308                         return err;
1309                 }
1310                 fw_flavor = (fw_flavor & 0x00000080) >> 7;
1311         }
1312
1313         btmtk_data->dev_id = dev_id;
1314
1315         err = btmtk_register_coredump(hdev, btmtk_data->drv_name, fw_version);
1316         if (err < 0)
1317                 bt_dev_err(hdev, "Failed to register coredump (%d)", err);
1318
1319         switch (dev_id) {
1320         case 0x7663:
1321                 fwname = FIRMWARE_MT7663;
1322                 break;
1323         case 0x7668:
1324                 fwname = FIRMWARE_MT7668;
1325                 break;
1326         case 0x7922:
1327         case 0x7961:
1328         case 0x7925:
1329                 /* Reset the device to ensure it's in the initial state before
1330                  * downloading the firmware to ensure.
1331                  */
1332
1333                 if (!test_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags))
1334                         btmtk_usb_subsys_reset(hdev, dev_id);
1335
1336                 btmtk_fw_get_filename(fw_bin_name, sizeof(fw_bin_name), dev_id,
1337                                       fw_version, fw_flavor);
1338
1339                 err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
1340                                                 btmtk_usb_hci_wmt_sync);
1341                 if (err < 0) {
1342                         bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
1343                         clear_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags);
1344                         return err;
1345                 }
1346
1347                 set_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags);
1348
1349                 /* It's Device EndPoint Reset Option Register */
1350                 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT,
1351                                               MTK_EP_RST_IN_OUT_OPT);
1352                 if (err < 0)
1353                         return err;
1354
1355                 /* Enable Bluetooth protocol */
1356                 param = 1;
1357                 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1358                 wmt_params.flag = 0;
1359                 wmt_params.dlen = sizeof(param);
1360                 wmt_params.data = &param;
1361                 wmt_params.status = NULL;
1362
1363                 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1364                 if (err < 0) {
1365                         bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1366                         return err;
1367                 }
1368
1369                 hci_set_msft_opcode(hdev, 0xFD30);
1370                 hci_set_aosp_capable(hdev);
1371
1372                 /* Set up ISO interface after protocol enabled */
1373                 if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) {
1374                         if (!btmtk_usb_isointf_init(hdev))
1375                                 set_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
1376                 }
1377
1378                 goto done;
1379         default:
1380                 bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
1381                            dev_id);
1382                 return -ENODEV;
1383         }
1384
1385         /* Query whether the firmware is already download */
1386         wmt_params.op = BTMTK_WMT_SEMAPHORE;
1387         wmt_params.flag = 1;
1388         wmt_params.dlen = 0;
1389         wmt_params.data = NULL;
1390         wmt_params.status = &status;
1391
1392         err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1393         if (err < 0) {
1394                 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
1395                 return err;
1396         }
1397
1398         if (status == BTMTK_WMT_PATCH_DONE) {
1399                 bt_dev_info(hdev, "firmware already downloaded");
1400                 goto ignore_setup_fw;
1401         }
1402
1403         /* Setup a firmware which the device definitely requires */
1404         err = btmtk_setup_firmware(hdev, fwname,
1405                                    btmtk_usb_hci_wmt_sync);
1406         if (err < 0)
1407                 return err;
1408
1409 ignore_setup_fw:
1410         err = readx_poll_timeout(btmtk_usb_func_query, hdev, status,
1411                                  status < 0 || status != BTMTK_WMT_ON_PROGRESS,
1412                                  2000, 5000000);
1413         /* -ETIMEDOUT happens */
1414         if (err < 0)
1415                 return err;
1416
1417         /* The other errors happen in btmtk_usb_func_query */
1418         if (status < 0)
1419                 return status;
1420
1421         if (status == BTMTK_WMT_ON_DONE) {
1422                 bt_dev_info(hdev, "function already on");
1423                 goto ignore_func_on;
1424         }
1425
1426         /* Enable Bluetooth protocol */
1427         param = 1;
1428         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1429         wmt_params.flag = 0;
1430         wmt_params.dlen = sizeof(param);
1431         wmt_params.data = &param;
1432         wmt_params.status = NULL;
1433
1434         err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1435         if (err < 0) {
1436                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1437                 return err;
1438         }
1439
1440 ignore_func_on:
1441         /* Apply the low power environment setup */
1442         tci_sleep.mode = 0x5;
1443         tci_sleep.duration = cpu_to_le16(0x640);
1444         tci_sleep.host_duration = cpu_to_le16(0x640);
1445         tci_sleep.host_wakeup_pin = 0;
1446         tci_sleep.time_compensation = 0;
1447
1448         skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
1449                              HCI_INIT_TIMEOUT);
1450         if (IS_ERR(skb)) {
1451                 err = PTR_ERR(skb);
1452                 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
1453                 return err;
1454         }
1455         kfree_skb(skb);
1456
1457 done:
1458         rettime = ktime_get();
1459         delta = ktime_sub(rettime, calltime);
1460         duration = (unsigned long long)ktime_to_ns(delta) >> 10;
1461
1462         bt_dev_info(hdev, "Device setup in %llu usecs", duration);
1463
1464         return 0;
1465 }
1466 EXPORT_SYMBOL_GPL(btmtk_usb_setup);
1467
1468 int btmtk_usb_shutdown(struct hci_dev *hdev)
1469 {
1470         struct btmtk_hci_wmt_params wmt_params;
1471         u8 param = 0;
1472         int err;
1473
1474         /* Disable the device */
1475         wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1476         wmt_params.flag = 0;
1477         wmt_params.dlen = sizeof(param);
1478         wmt_params.data = &param;
1479         wmt_params.status = NULL;
1480
1481         err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
1482         if (err < 0) {
1483                 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1484                 return err;
1485         }
1486
1487         return 0;
1488 }
1489 EXPORT_SYMBOL_GPL(btmtk_usb_shutdown);
1490
1491 MODULE_AUTHOR("Sean Wang <[email protected]>");
1492 MODULE_AUTHOR("Mark Chen <[email protected]>");
1493 MODULE_DESCRIPTION("Bluetooth support for MediaTek devices ver " VERSION);
1494 MODULE_VERSION(VERSION);
1495 MODULE_LICENSE("GPL");
1496 MODULE_FIRMWARE(FIRMWARE_MT7622);
1497 MODULE_FIRMWARE(FIRMWARE_MT7663);
1498 MODULE_FIRMWARE(FIRMWARE_MT7668);
1499 MODULE_FIRMWARE(FIRMWARE_MT7922);
1500 MODULE_FIRMWARE(FIRMWARE_MT7961);
1501 MODULE_FIRMWARE(FIRMWARE_MT7925);