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 <linux/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 == 0x6639) 116 snprintf(buf, size, 117 "mediatek/mt7927/BT_RAM_CODE_MT%04x_2_%x_hdr.bin", 118 dev_id & 0xffff, (fw_ver & 0xff) + 1); 119 else if (dev_id == 0x7925) 120 snprintf(buf, size, 121 "mediatek/mt%04x/BT_RAM_CODE_MT%04x_1_%x_hdr.bin", 122 dev_id & 0xffff, dev_id & 0xffff, (fw_ver & 0xff) + 1); 123 else if (dev_id == 0x7961 && fw_flavor) 124 snprintf(buf, size, 125 "mediatek/BT_RAM_CODE_MT%04x_1a_%x_hdr.bin", 126 dev_id & 0xffff, (fw_ver & 0xff) + 1); 127 else 128 snprintf(buf, size, 129 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin", 130 dev_id & 0xffff, (fw_ver & 0xff) + 1); 131 } 132 EXPORT_SYMBOL_GPL(btmtk_fw_get_filename); 133 134 int btmtk_setup_firmware_79xx(struct hci_dev *hdev, const char *fwname, 135 wmt_cmd_sync_func_t wmt_cmd_sync, 136 u32 dev_id) 137 { 138 struct btmtk_hci_wmt_params wmt_params; 139 struct btmtk_patch_header *hdr; 140 struct btmtk_global_desc *globaldesc = NULL; 141 struct btmtk_section_map *sectionmap; 142 const struct firmware *fw; 143 const u8 *fw_ptr; 144 const u8 *fw_bin_ptr; 145 int err, dlen, i, status; 146 u8 flag, first_block, retry; 147 u32 section_num, dl_size, section_offset; 148 u8 cmd[64]; 149 150 err = request_firmware(&fw, fwname, &hdev->dev); 151 if (err < 0) { 152 bt_dev_err(hdev, "Failed to load firmware file (%d)", err); 153 return err; 154 } 155 156 fw_ptr = fw->data; 157 fw_bin_ptr = fw_ptr; 158 hdr = (struct btmtk_patch_header *)fw_ptr; 159 globaldesc = (struct btmtk_global_desc *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE); 160 section_num = le32_to_cpu(globaldesc->section_num); 161 162 bt_dev_info(hdev, "HW/SW Version: 0x%04x%04x, Build Time: %s", 163 le16_to_cpu(hdr->hwver), le16_to_cpu(hdr->swver), hdr->datetime); 164 165 for (i = 0; i < section_num; i++) { 166 first_block = 1; 167 fw_ptr = fw_bin_ptr; 168 sectionmap = (struct btmtk_section_map *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE + 169 MTK_FW_ROM_PATCH_GD_SIZE + MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i); 170 171 section_offset = le32_to_cpu(sectionmap->secoffset); 172 dl_size = le32_to_cpu(sectionmap->bin_info_spec.dlsize); 173 174 /* MT6639: only download sections where dlmode byte0 == 0x01, 175 * matching the Windows driver behavior which skips WiFi/other 176 * sections that would cause the chip to hang. 177 */ 178 if (dev_id == 0x6639 && dl_size > 0 && 179 (le32_to_cpu(sectionmap->bin_info_spec.dlmodecrctype) & 0xff) != 0x01) 180 continue; 181 182 if (dl_size > 0) { 183 retry = 20; 184 while (retry > 0) { 185 cmd[0] = 0; /* 0 means legacy dl mode. */ 186 memcpy(cmd + 1, 187 fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE + 188 MTK_FW_ROM_PATCH_GD_SIZE + 189 MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i + 190 MTK_SEC_MAP_COMMON_SIZE, 191 MTK_SEC_MAP_NEED_SEND_SIZE); 192 193 wmt_params.op = BTMTK_WMT_PATCH_DWNLD; 194 wmt_params.status = &status; 195 wmt_params.flag = 0; 196 wmt_params.dlen = MTK_SEC_MAP_NEED_SEND_SIZE + 1; 197 wmt_params.data = &cmd; 198 199 err = wmt_cmd_sync(hdev, &wmt_params); 200 if (err < 0) { 201 bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", 202 err); 203 goto err_release_fw; 204 } 205 206 if (status == BTMTK_WMT_PATCH_UNDONE) { 207 break; 208 } else if (status == BTMTK_WMT_PATCH_PROGRESS) { 209 msleep(100); 210 retry--; 211 } else if (status == BTMTK_WMT_PATCH_DONE) { 212 goto next_section; 213 } else { 214 bt_dev_err(hdev, "Failed wmt patch dwnld status (%d)", 215 status); 216 err = -EIO; 217 goto err_release_fw; 218 } 219 } 220 221 /* If retry exhausted goto err_release_fw */ 222 if (retry == 0) { 223 err = -EIO; 224 goto err_release_fw; 225 } 226 227 fw_ptr += section_offset; 228 wmt_params.op = BTMTK_WMT_PATCH_DWNLD; 229 230 while (dl_size > 0) { 231 dlen = min_t(int, 250, dl_size); 232 if (first_block == 1) { 233 flag = 1; 234 first_block = 0; 235 } else if (dl_size - dlen <= 0) { 236 flag = 3; 237 } else { 238 flag = 2; 239 } 240 241 wmt_params.flag = flag; 242 wmt_params.dlen = dlen; 243 wmt_params.data = fw_ptr; 244 245 err = wmt_cmd_sync(hdev, &wmt_params); 246 /* Status BTMTK_WMT_PATCH_PROGRESS indicates firmware is 247 * in process of being downloaded, which is not expected to 248 * occur here. 249 */ 250 if (status == BTMTK_WMT_PATCH_PROGRESS) { 251 err = -EIO; 252 goto err_release_fw; 253 } else if (err < 0) { 254 bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", 255 err); 256 goto err_release_fw; 257 } 258 259 dl_size -= dlen; 260 fw_ptr += dlen; 261 } 262 } 263 next_section: 264 continue; 265 } 266 /* Wait a few moments for firmware activation done */ 267 usleep_range(100000, 120000); 268 269 err_release_fw: 270 release_firmware(fw); 271 272 return err; 273 } 274 EXPORT_SYMBOL_GPL(btmtk_setup_firmware_79xx); 275 276 int btmtk_setup_firmware(struct hci_dev *hdev, const char *fwname, 277 wmt_cmd_sync_func_t wmt_cmd_sync) 278 { 279 struct btmtk_hci_wmt_params wmt_params; 280 const struct firmware *fw; 281 const u8 *fw_ptr; 282 size_t fw_size; 283 int err, dlen; 284 u8 flag, param; 285 286 err = request_firmware(&fw, fwname, &hdev->dev); 287 if (err < 0) { 288 bt_dev_err(hdev, "Failed to load firmware file (%d)", err); 289 return err; 290 } 291 292 /* Power on data RAM the firmware relies on. */ 293 param = 1; 294 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 295 wmt_params.flag = 3; 296 wmt_params.dlen = sizeof(param); 297 wmt_params.data = ¶m; 298 wmt_params.status = NULL; 299 300 err = wmt_cmd_sync(hdev, &wmt_params); 301 if (err < 0) { 302 bt_dev_err(hdev, "Failed to power on data RAM (%d)", err); 303 goto err_release_fw; 304 } 305 306 fw_ptr = fw->data; 307 fw_size = fw->size; 308 309 /* The size of patch header is 30 bytes, should be skip */ 310 if (fw_size < 30) { 311 err = -EINVAL; 312 goto err_release_fw; 313 } 314 315 fw_size -= 30; 316 fw_ptr += 30; 317 flag = 1; 318 319 wmt_params.op = BTMTK_WMT_PATCH_DWNLD; 320 wmt_params.status = NULL; 321 322 while (fw_size > 0) { 323 dlen = min_t(int, 250, fw_size); 324 325 /* Tell device the position in sequence */ 326 if (fw_size - dlen <= 0) 327 flag = 3; 328 else if (fw_size < fw->size - 30) 329 flag = 2; 330 331 wmt_params.flag = flag; 332 wmt_params.dlen = dlen; 333 wmt_params.data = fw_ptr; 334 335 err = wmt_cmd_sync(hdev, &wmt_params); 336 if (err < 0) { 337 bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)", 338 err); 339 goto err_release_fw; 340 } 341 342 fw_size -= dlen; 343 fw_ptr += dlen; 344 } 345 346 wmt_params.op = BTMTK_WMT_RST; 347 wmt_params.flag = 4; 348 wmt_params.dlen = 0; 349 wmt_params.data = NULL; 350 wmt_params.status = NULL; 351 352 /* Activate function the firmware providing to */ 353 err = wmt_cmd_sync(hdev, &wmt_params); 354 if (err < 0) { 355 bt_dev_err(hdev, "Failed to send wmt rst (%d)", err); 356 goto err_release_fw; 357 } 358 359 /* Wait a few moments for firmware activation done */ 360 usleep_range(10000, 12000); 361 362 err_release_fw: 363 release_firmware(fw); 364 365 return err; 366 } 367 EXPORT_SYMBOL_GPL(btmtk_setup_firmware); 368 369 int btmtk_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 370 { 371 struct sk_buff *skb; 372 long ret; 373 374 skb = __hci_cmd_sync(hdev, 0xfc1a, 6, bdaddr, HCI_INIT_TIMEOUT); 375 if (IS_ERR(skb)) { 376 ret = PTR_ERR(skb); 377 bt_dev_err(hdev, "changing Mediatek device address failed (%ld)", 378 ret); 379 return ret; 380 } 381 kfree_skb(skb); 382 383 return 0; 384 } 385 EXPORT_SYMBOL_GPL(btmtk_set_bdaddr); 386 387 void btmtk_reset_sync(struct hci_dev *hdev) 388 { 389 struct btmtk_data *reset_work = hci_get_priv(hdev); 390 int err; 391 392 hci_dev_lock(hdev); 393 394 err = hci_cmd_sync_queue(hdev, reset_work->reset_sync, NULL, NULL); 395 if (err) 396 bt_dev_err(hdev, "failed to reset (%d)", err); 397 398 hci_dev_unlock(hdev); 399 } 400 EXPORT_SYMBOL_GPL(btmtk_reset_sync); 401 402 int btmtk_register_coredump(struct hci_dev *hdev, const char *name, 403 u32 fw_version) 404 { 405 struct btmtk_data *data = hci_get_priv(hdev); 406 407 if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) 408 return -EOPNOTSUPP; 409 410 data->cd_info.fw_version = fw_version; 411 data->cd_info.state = HCI_DEVCOREDUMP_IDLE; 412 data->cd_info.driver_name = name; 413 414 return hci_devcd_register(hdev, btmtk_coredump, btmtk_coredump_hdr, 415 btmtk_coredump_notify); 416 } 417 EXPORT_SYMBOL_GPL(btmtk_register_coredump); 418 419 int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb) 420 { 421 struct btmtk_data *data = hci_get_priv(hdev); 422 int err; 423 bool complete = false; 424 425 if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) { 426 kfree_skb(skb); 427 return 0; 428 } 429 430 switch (data->cd_info.state) { 431 case HCI_DEVCOREDUMP_IDLE: 432 err = hci_devcd_init(hdev, MTK_COREDUMP_SIZE); 433 if (err < 0) { 434 kfree_skb(skb); 435 break; 436 } 437 data->cd_info.cnt = 0; 438 439 /* It is supposed coredump can be done within 5 seconds */ 440 schedule_delayed_work(&hdev->dump.dump_timeout, 441 msecs_to_jiffies(5000)); 442 fallthrough; 443 case HCI_DEVCOREDUMP_ACTIVE: 444 default: 445 /* Mediatek coredump data would be more than MTK_COREDUMP_NUM */ 446 if (data->cd_info.cnt >= MTK_COREDUMP_NUM && 447 skb->len > MTK_COREDUMP_END_LEN) 448 if (!memcmp((char *)&skb->data[skb->len - MTK_COREDUMP_END_LEN], 449 MTK_COREDUMP_END, MTK_COREDUMP_END_LEN - 1)) 450 complete = true; 451 452 err = hci_devcd_append(hdev, skb); 453 if (err < 0) 454 break; 455 data->cd_info.cnt++; 456 457 if (complete) { 458 bt_dev_info(hdev, "Mediatek coredump end"); 459 hci_devcd_complete(hdev); 460 } 461 462 break; 463 } 464 465 return err; 466 } 467 EXPORT_SYMBOL_GPL(btmtk_process_coredump); 468 469 #if IS_ENABLED(CONFIG_BT_HCIBTUSB_MTK) 470 /* Known MT6639 (MT7927) Bluetooth USB devices. 471 * Used to scope the zero-CHIPID workaround to real MT6639 hardware, 472 * since some boards return 0x0000 from the MMIO chip ID register. 473 */ 474 static const struct { 475 u16 vendor; 476 u16 product; 477 } btmtk_mt6639_devs[] = { 478 { 0x0489, 0xe13a }, /* ASUS ROG Crosshair X870E Hero */ 479 { 0x0489, 0xe0fa }, /* Lenovo Legion Pro 7 16ARX9 */ 480 { 0x0489, 0xe10f }, /* Gigabyte Z790 AORUS MASTER X */ 481 { 0x0489, 0xe110 }, /* MSI X870E Ace Max */ 482 { 0x0489, 0xe116 }, /* TP-Link Archer TBE550E */ 483 { 0x13d3, 0x3588 }, /* ASUS ROG STRIX X870E-E */ 484 }; 485 486 static void btmtk_usb_wmt_recv(struct urb *urb) 487 { 488 struct hci_dev *hdev = urb->context; 489 struct btmtk_data *data = hci_get_priv(hdev); 490 struct sk_buff *skb; 491 int err; 492 493 if (urb->status == 0 && urb->actual_length > 0) { 494 hdev->stat.byte_rx += urb->actual_length; 495 496 /* WMT event shouldn't be fragmented and the size should be 497 * less than HCI_WMT_MAX_EVENT_SIZE. 498 */ 499 skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC); 500 if (!skb) { 501 hdev->stat.err_rx++; 502 kfree(urb->setup_packet); 503 return; 504 } 505 506 hci_skb_pkt_type(skb) = HCI_EVENT_PKT; 507 skb_put_data(skb, urb->transfer_buffer, urb->actual_length); 508 509 /* When someone waits for the WMT event, the skb is being cloned 510 * and being processed the events from there then. 511 */ 512 if (test_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags)) { 513 data->evt_skb = skb_clone(skb, GFP_ATOMIC); 514 if (!data->evt_skb) { 515 kfree_skb(skb); 516 kfree(urb->setup_packet); 517 return; 518 } 519 } 520 521 err = hci_recv_frame(hdev, skb); 522 if (err < 0) { 523 kfree_skb(data->evt_skb); 524 data->evt_skb = NULL; 525 kfree(urb->setup_packet); 526 return; 527 } 528 529 if (test_and_clear_bit(BTMTK_TX_WAIT_VND_EVT, 530 &data->flags)) { 531 /* Barrier to sync with other CPUs */ 532 smp_mb__after_atomic(); 533 wake_up_bit(&data->flags, 534 BTMTK_TX_WAIT_VND_EVT); 535 } 536 kfree(urb->setup_packet); 537 return; 538 } else if (urb->status == -ENOENT) { 539 /* Avoid suspend failed when usb_kill_urb */ 540 kfree(urb->setup_packet); 541 return; 542 } 543 544 usb_mark_last_busy(data->udev); 545 546 /* The URB complete handler is still called with urb->actual_length = 0 547 * when the event is not available, so we should keep re-submitting 548 * URB until WMT event returns, Also, It's necessary to wait some time 549 * between the two consecutive control URBs to relax the target device 550 * to generate the event. Otherwise, the WMT event cannot return from 551 * the device successfully. 552 */ 553 udelay(500); 554 555 usb_anchor_urb(urb, data->ctrl_anchor); 556 err = usb_submit_urb(urb, GFP_ATOMIC); 557 if (err < 0) { 558 kfree(urb->setup_packet); 559 /* -EPERM: urb is being killed; 560 * -ENODEV: device got disconnected 561 */ 562 if (err != -EPERM && err != -ENODEV) 563 bt_dev_err(hdev, "urb %p failed to resubmit (%d)", 564 urb, -err); 565 usb_unanchor_urb(urb); 566 } 567 } 568 569 static int btmtk_usb_submit_wmt_recv_urb(struct hci_dev *hdev) 570 { 571 struct btmtk_data *data = hci_get_priv(hdev); 572 struct usb_ctrlrequest *dr; 573 unsigned char *buf; 574 int err, size = 64; 575 unsigned int pipe; 576 struct urb *urb; 577 578 urb = usb_alloc_urb(0, GFP_KERNEL); 579 if (!urb) 580 return -ENOMEM; 581 582 dr = kmalloc_obj(*dr); 583 if (!dr) { 584 usb_free_urb(urb); 585 return -ENOMEM; 586 } 587 588 dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN; 589 dr->bRequest = 1; 590 dr->wIndex = cpu_to_le16(0); 591 dr->wValue = cpu_to_le16(48); 592 dr->wLength = cpu_to_le16(size); 593 594 buf = kmalloc(size, GFP_KERNEL); 595 if (!buf) { 596 kfree(dr); 597 usb_free_urb(urb); 598 return -ENOMEM; 599 } 600 601 pipe = usb_rcvctrlpipe(data->udev, 0); 602 603 usb_fill_control_urb(urb, data->udev, pipe, (void *)dr, 604 buf, size, btmtk_usb_wmt_recv, hdev); 605 606 urb->transfer_flags |= URB_FREE_BUFFER; 607 608 usb_anchor_urb(urb, data->ctrl_anchor); 609 err = usb_submit_urb(urb, GFP_KERNEL); 610 if (err < 0) { 611 if (err != -EPERM && err != -ENODEV) 612 bt_dev_err(hdev, "urb %p submission failed (%d)", 613 urb, -err); 614 kfree(dr); 615 usb_unanchor_urb(urb); 616 } 617 618 usb_free_urb(urb); 619 620 return err; 621 } 622 623 static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev, 624 struct btmtk_hci_wmt_params *wmt_params) 625 { 626 struct btmtk_data *data = hci_get_priv(hdev); 627 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc; 628 u32 hlen, status = BTMTK_WMT_INVALID; 629 struct btmtk_hci_wmt_evt *wmt_evt; 630 struct btmtk_hci_wmt_cmd *wc; 631 struct btmtk_wmt_hdr *hdr; 632 int err; 633 634 /* Send the WMT command and wait until the WMT event returns */ 635 hlen = sizeof(*hdr) + wmt_params->dlen; 636 if (hlen > 255) 637 return -EINVAL; 638 639 wc = kzalloc(hlen, GFP_KERNEL); 640 if (!wc) 641 return -ENOMEM; 642 643 hdr = &wc->hdr; 644 hdr->dir = 1; 645 hdr->op = wmt_params->op; 646 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1); 647 hdr->flag = wmt_params->flag; 648 memcpy(wc->data, wmt_params->data, wmt_params->dlen); 649 650 set_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags); 651 652 /* WMT cmd/event doesn't follow up the generic HCI cmd/event handling, 653 * it needs constantly polling control pipe until the host received the 654 * WMT event, thus, we should require to specifically acquire PM counter 655 * on the USB to prevent the interface from entering auto suspended 656 * while WMT cmd/event in progress. 657 */ 658 err = usb_autopm_get_interface(data->intf); 659 if (err < 0) 660 goto err_free_wc; 661 662 err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc); 663 664 if (err < 0) { 665 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags); 666 usb_autopm_put_interface(data->intf); 667 goto err_free_wc; 668 } 669 670 /* Submit control IN URB on demand to process the WMT event */ 671 err = btmtk_usb_submit_wmt_recv_urb(hdev); 672 673 usb_autopm_put_interface(data->intf); 674 675 if (err < 0) 676 goto err_free_wc; 677 678 /* The vendor specific WMT commands are all answered by a vendor 679 * specific event and will have the Command Status or Command 680 * Complete as with usual HCI command flow control. 681 * 682 * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT 683 * state to be cleared. The driver specific event receive routine 684 * will clear that state and with that indicate completion of the 685 * WMT command. 686 */ 687 err = wait_on_bit_timeout(&data->flags, BTMTK_TX_WAIT_VND_EVT, 688 TASK_UNINTERRUPTIBLE, HCI_INIT_TIMEOUT); 689 690 if (err) { 691 bt_dev_err(hdev, "Execution of wmt command timed out"); 692 clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags); 693 err = -ETIMEDOUT; 694 goto err_free_wc; 695 } 696 697 if (data->evt_skb == NULL) 698 goto err_free_wc; 699 700 wmt_evt = skb_pull_data(data->evt_skb, sizeof(*wmt_evt)); 701 if (!wmt_evt) { 702 bt_dev_err(hdev, "WMT event too short (%u bytes)", 703 data->evt_skb->len); 704 err = -EINVAL; 705 goto err_free_skb; 706 } 707 if (wmt_evt->whdr.op != hdr->op) { 708 bt_dev_err(hdev, "Wrong op received %d expected %d", 709 wmt_evt->whdr.op, hdr->op); 710 err = -EIO; 711 goto err_free_skb; 712 } 713 714 switch (wmt_evt->whdr.op) { 715 case BTMTK_WMT_SEMAPHORE: 716 if (wmt_evt->whdr.flag == 2) 717 status = BTMTK_WMT_PATCH_UNDONE; 718 else 719 status = BTMTK_WMT_PATCH_DONE; 720 break; 721 case BTMTK_WMT_FUNC_CTRL: 722 if (!skb_pull_data(data->evt_skb, 723 sizeof(wmt_evt_funcc->status))) { 724 status = BTMTK_WMT_ON_UNDONE; 725 break; 726 } 727 728 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt; 729 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404) 730 status = BTMTK_WMT_ON_DONE; 731 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420) 732 status = BTMTK_WMT_ON_PROGRESS; 733 else 734 status = BTMTK_WMT_ON_UNDONE; 735 break; 736 case BTMTK_WMT_PATCH_DWNLD: 737 if (wmt_evt->whdr.flag == 2) 738 status = BTMTK_WMT_PATCH_DONE; 739 else if (wmt_evt->whdr.flag == 1) 740 status = BTMTK_WMT_PATCH_PROGRESS; 741 else 742 status = BTMTK_WMT_PATCH_UNDONE; 743 break; 744 } 745 746 if (wmt_params->status) 747 *wmt_params->status = status; 748 749 err_free_skb: 750 kfree_skb(data->evt_skb); 751 data->evt_skb = NULL; 752 err_free_wc: 753 kfree(wc); 754 return err; 755 } 756 757 static int btmtk_usb_func_query(struct hci_dev *hdev) 758 { 759 struct btmtk_hci_wmt_params wmt_params; 760 int status, err; 761 u8 param = 0; 762 763 /* Query whether the function is enabled */ 764 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 765 wmt_params.flag = 4; 766 wmt_params.dlen = sizeof(param); 767 wmt_params.data = ¶m; 768 wmt_params.status = &status; 769 770 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); 771 if (err < 0) { 772 bt_dev_err(hdev, "Failed to query function status (%d)", err); 773 return err; 774 } 775 776 return status; 777 } 778 779 static int btmtk_usb_uhw_reg_write(struct hci_dev *hdev, u32 reg, u32 val) 780 { 781 struct btmtk_data *data = hci_get_priv(hdev); 782 int pipe, err; 783 void *buf; 784 785 buf = kzalloc(4, GFP_KERNEL); 786 if (!buf) 787 return -ENOMEM; 788 789 put_unaligned_le32(val, buf); 790 791 pipe = usb_sndctrlpipe(data->udev, 0); 792 err = usb_control_msg(data->udev, pipe, 0x02, 793 0x5E, 794 reg >> 16, reg & 0xffff, 795 buf, 4, USB_CTRL_SET_TIMEOUT); 796 if (err < 0) 797 bt_dev_err(hdev, "Failed to write uhw reg(%d)", err); 798 799 kfree(buf); 800 801 return err; 802 } 803 804 static int btmtk_usb_uhw_reg_read(struct hci_dev *hdev, u32 reg, u32 *val) 805 { 806 struct btmtk_data *data = hci_get_priv(hdev); 807 u8 buf[sizeof(u32)]; 808 int err; 809 810 *val = 0; 811 err = usb_control_msg_recv(data->udev, 0, 0x01, 812 0xDE, 813 reg >> 16, reg & 0xffff, 814 buf, sizeof(buf), USB_CTRL_GET_TIMEOUT, 815 GFP_KERNEL); 816 if (err) { 817 bt_dev_err(hdev, "Failed to read uhw reg(%d)", err); 818 return err; 819 } 820 821 *val = get_unaligned_le32(buf); 822 bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val); 823 824 return 0; 825 } 826 827 static int btmtk_usb_reg_read(struct hci_dev *hdev, u32 reg, u32 *val) 828 { 829 struct btmtk_data *data = hci_get_priv(hdev); 830 u8 buf[sizeof(u32)]; 831 int err; 832 833 *val = 0; 834 err = usb_control_msg_recv(data->udev, 0, 0x63, 835 USB_TYPE_VENDOR | USB_DIR_IN, 836 reg >> 16, reg & 0xffff, 837 buf, sizeof(buf), USB_CTRL_GET_TIMEOUT, 838 GFP_KERNEL); 839 if (err < 0) 840 return err; 841 842 *val = get_unaligned_le32(buf); 843 844 return 0; 845 } 846 847 static int btmtk_usb_id_get(struct hci_dev *hdev, u32 reg, u32 *id) 848 { 849 return btmtk_usb_reg_read(hdev, reg, id); 850 } 851 852 static u32 btmtk_usb_reset_done(struct hci_dev *hdev) 853 { 854 u32 val = 0; 855 856 btmtk_usb_uhw_reg_read(hdev, MTK_BT_MISC, &val); 857 858 return val & MTK_BT_RST_DONE; 859 } 860 861 int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id) 862 { 863 u32 val; 864 int err; 865 866 if (dev_id == 0x7922) { 867 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val); 868 if (err) 869 return err; 870 val |= 0x00002020; 871 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val); 872 if (err < 0) 873 return err; 874 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001); 875 if (err < 0) 876 return err; 877 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val); 878 if (err) 879 return err; 880 val |= BIT(0); 881 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val); 882 if (err < 0) 883 return err; 884 msleep(100); 885 } else if (dev_id == 0x7925 || dev_id == 0x6639) { 886 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val); 887 if (err) 888 return err; 889 val |= (1 << 5); 890 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val); 891 if (err < 0) 892 return err; 893 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val); 894 if (err) 895 return err; 896 val &= 0xFFFF00FF; 897 val |= (1 << 13); 898 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val); 899 if (err < 0) 900 return err; 901 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001); 902 if (err < 0) 903 return err; 904 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val); 905 if (err) 906 return err; 907 val |= (1 << 0); 908 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val); 909 if (err < 0) 910 return err; 911 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF); 912 if (err < 0) 913 return err; 914 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val); 915 if (err) 916 return err; 917 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF); 918 if (err < 0) 919 return err; 920 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val); 921 if (err) 922 return err; 923 msleep(100); 924 } else { 925 /* It's Device EndPoint Reset Option Register */ 926 bt_dev_dbg(hdev, "Initiating reset mechanism via uhw"); 927 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT); 928 if (err < 0) 929 return err; 930 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_WDT_STATUS, &val); 931 if (err) 932 return err; 933 /* Reset the bluetooth chip via USB interface. */ 934 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 1); 935 if (err < 0) 936 return err; 937 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF); 938 if (err < 0) 939 return err; 940 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val); 941 if (err) 942 return err; 943 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF); 944 if (err < 0) 945 return err; 946 err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val); 947 if (err) 948 return err; 949 /* MT7921 need to delay 20ms between toggle reset bit */ 950 msleep(20); 951 err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 0); 952 if (err < 0) 953 return err; 954 err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val); 955 if (err) 956 return err; 957 } 958 959 err = readx_poll_timeout(btmtk_usb_reset_done, hdev, val, 960 val & MTK_BT_RST_DONE, 20000, 1000000); 961 if (err < 0) 962 bt_dev_err(hdev, "Reset timeout"); 963 964 if (dev_id == 0x7922) { 965 err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF); 966 if (err < 0) 967 return err; 968 } 969 970 err = btmtk_usb_id_get(hdev, 0x70010200, &val); 971 if (err || (!val && dev_id != 0x6639)) 972 bt_dev_err(hdev, "Can't get device id, subsys reset fail."); 973 974 return err; 975 } 976 EXPORT_SYMBOL_GPL(btmtk_usb_subsys_reset); 977 978 int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb) 979 { 980 struct btmtk_data *data = hci_get_priv(hdev); 981 u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle); 982 983 switch (handle) { 984 case 0xfc6f: /* Firmware dump from device */ 985 /* When the firmware hangs, the device can no longer 986 * suspend and thus disable auto-suspend. 987 */ 988 usb_disable_autosuspend(data->udev); 989 990 /* We need to forward the diagnostic packet to userspace daemon 991 * for backward compatibility, so we have to clone the packet 992 * extraly for the in-kernel coredump support. 993 */ 994 if (IS_ENABLED(CONFIG_DEV_COREDUMP)) { 995 struct sk_buff *skb_cd = skb_clone(skb, GFP_ATOMIC); 996 997 if (skb_cd) 998 btmtk_process_coredump(hdev, skb_cd); 999 } 1000 1001 fallthrough; 1002 case 0x05ff: /* Firmware debug logging 1 */ 1003 case 0x05fe: /* Firmware debug logging 2 */ 1004 return hci_recv_diag(hdev, skb); 1005 } 1006 1007 return hci_recv_frame(hdev, skb); 1008 } 1009 EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl); 1010 1011 static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb) 1012 { 1013 if (skb->len > MTK_ISO_THRESHOLD) 1014 return -EINVAL; 1015 1016 if (skb_pad(skb, MTK_ISO_THRESHOLD - skb->len)) 1017 return -ENOMEM; 1018 1019 __skb_put(skb, MTK_ISO_THRESHOLD - skb->len); 1020 1021 return 0; 1022 } 1023 1024 static int __set_mtk_intr_interface(struct hci_dev *hdev) 1025 { 1026 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1027 struct usb_interface *intf = btmtk_data->isopkt_intf; 1028 int err; 1029 1030 if (!btmtk_data->isopkt_intf) 1031 return -ENODEV; 1032 1033 err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM, 1034 (intf->num_altsetting > 1) ? 1 : 0); 1035 if (err < 0) { 1036 bt_dev_err(hdev, "setting interface failed (%d)", -err); 1037 return err; 1038 } 1039 1040 err = usb_find_common_endpoints(intf->cur_altsetting, NULL, NULL, 1041 &btmtk_data->isopkt_rx_ep, 1042 &btmtk_data->isopkt_tx_ep); 1043 if (err) { 1044 bt_dev_err(hdev, "invalid interrupt descriptors"); 1045 return -ENODEV; 1046 } 1047 1048 return 0; 1049 } 1050 1051 struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb, 1052 usb_complete_t tx_complete) 1053 { 1054 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1055 struct urb *urb; 1056 unsigned int pipe; 1057 1058 if (!btmtk_data->isopkt_tx_ep) 1059 return ERR_PTR(-ENODEV); 1060 1061 urb = usb_alloc_urb(0, GFP_KERNEL); 1062 if (!urb) 1063 return ERR_PTR(-ENOMEM); 1064 1065 if (btmtk_isopkt_pad(hdev, skb)) { 1066 usb_free_urb(urb); 1067 return ERR_PTR(-EINVAL); 1068 } 1069 1070 pipe = usb_sndintpipe(btmtk_data->udev, 1071 btmtk_data->isopkt_tx_ep->bEndpointAddress); 1072 1073 usb_fill_int_urb(urb, btmtk_data->udev, pipe, 1074 skb->data, skb->len, tx_complete, 1075 skb, btmtk_data->isopkt_tx_ep->bInterval); 1076 1077 skb->dev = (void *)hdev; 1078 1079 return urb; 1080 } 1081 EXPORT_SYMBOL_GPL(alloc_mtk_intr_urb); 1082 1083 static int btmtk_recv_isopkt(struct hci_dev *hdev, void *buffer, int count) 1084 { 1085 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1086 struct sk_buff *skb; 1087 unsigned long flags; 1088 int err = 0; 1089 1090 spin_lock_irqsave(&btmtk_data->isorxlock, flags); 1091 skb = btmtk_data->isopkt_skb; 1092 1093 while (count) { 1094 int len; 1095 1096 if (!skb) { 1097 skb = bt_skb_alloc(HCI_MAX_ISO_SIZE, GFP_ATOMIC); 1098 if (!skb) { 1099 err = -ENOMEM; 1100 break; 1101 } 1102 1103 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT; 1104 hci_skb_expect(skb) = HCI_ISO_HDR_SIZE; 1105 } 1106 1107 len = min_t(uint, hci_skb_expect(skb), count); 1108 skb_put_data(skb, buffer, len); 1109 1110 count -= len; 1111 buffer += len; 1112 hci_skb_expect(skb) -= len; 1113 1114 if (skb->len == HCI_ISO_HDR_SIZE) { 1115 __le16 dlen = ((struct hci_iso_hdr *)skb->data)->dlen; 1116 1117 /* Complete ISO header */ 1118 hci_skb_expect(skb) = __le16_to_cpu(dlen); 1119 1120 if (skb_tailroom(skb) < hci_skb_expect(skb)) { 1121 kfree_skb(skb); 1122 skb = NULL; 1123 1124 err = -EILSEQ; 1125 break; 1126 } 1127 } 1128 1129 if (!hci_skb_expect(skb)) { 1130 /* Complete frame */ 1131 hci_recv_frame(hdev, skb); 1132 skb = NULL; 1133 } 1134 } 1135 1136 btmtk_data->isopkt_skb = skb; 1137 spin_unlock_irqrestore(&btmtk_data->isorxlock, flags); 1138 1139 return err; 1140 } 1141 1142 static void btmtk_intr_complete(struct urb *urb) 1143 { 1144 struct hci_dev *hdev = urb->context; 1145 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1146 int err; 1147 1148 BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status, 1149 urb->actual_length); 1150 1151 if (!test_bit(HCI_RUNNING, &hdev->flags)) 1152 return; 1153 1154 if (hdev->suspended) 1155 return; 1156 1157 if (urb->status == 0) { 1158 hdev->stat.byte_rx += urb->actual_length; 1159 1160 if (btmtk_recv_isopkt(hdev, urb->transfer_buffer, 1161 urb->actual_length) < 0) { 1162 bt_dev_err(hdev, "corrupted iso packet"); 1163 hdev->stat.err_rx++; 1164 } 1165 } else if (urb->status == -ENOENT) { 1166 /* Avoid suspend failed when usb_kill_urb */ 1167 return; 1168 } 1169 1170 usb_mark_last_busy(btmtk_data->udev); 1171 usb_anchor_urb(urb, &btmtk_data->isopkt_anchor); 1172 1173 err = usb_submit_urb(urb, GFP_ATOMIC); 1174 if (err < 0) { 1175 /* -EPERM: urb is being killed; 1176 * -ENODEV: device got disconnected 1177 */ 1178 if (err != -EPERM && err != -ENODEV) 1179 bt_dev_err(hdev, "urb %p failed to resubmit (%d)", 1180 urb, -err); 1181 if (err != -EPERM) 1182 hci_cmd_sync_cancel(hdev, -err); 1183 usb_unanchor_urb(urb); 1184 } 1185 } 1186 1187 static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags) 1188 { 1189 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1190 unsigned char *buf; 1191 unsigned int pipe; 1192 struct urb *urb; 1193 int err, size; 1194 1195 BT_DBG("%s", hdev->name); 1196 1197 if (!btmtk_data->isopkt_rx_ep) 1198 return -ENODEV; 1199 1200 urb = usb_alloc_urb(0, mem_flags); 1201 if (!urb) 1202 return -ENOMEM; 1203 size = le16_to_cpu(btmtk_data->isopkt_rx_ep->wMaxPacketSize); 1204 1205 buf = kmalloc(size, mem_flags); 1206 if (!buf) { 1207 usb_free_urb(urb); 1208 return -ENOMEM; 1209 } 1210 1211 pipe = usb_rcvintpipe(btmtk_data->udev, 1212 btmtk_data->isopkt_rx_ep->bEndpointAddress); 1213 1214 usb_fill_int_urb(urb, btmtk_data->udev, pipe, buf, size, 1215 btmtk_intr_complete, hdev, 1216 btmtk_data->isopkt_rx_ep->bInterval); 1217 1218 urb->transfer_flags |= URB_FREE_BUFFER; 1219 1220 usb_mark_last_busy(btmtk_data->udev); 1221 usb_anchor_urb(urb, &btmtk_data->isopkt_anchor); 1222 1223 err = usb_submit_urb(urb, mem_flags); 1224 if (err < 0) { 1225 if (err != -EPERM && err != -ENODEV) 1226 bt_dev_err(hdev, "urb %p submission failed (%d)", 1227 urb, -err); 1228 usb_unanchor_urb(urb); 1229 } 1230 1231 usb_free_urb(urb); 1232 1233 return err; 1234 } 1235 1236 static int btmtk_usb_isointf_init(struct hci_dev *hdev) 1237 { 1238 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1239 u8 iso_param[2] = { 0x08, 0x01 }; 1240 struct sk_buff *skb; 1241 int err; 1242 1243 spin_lock_init(&btmtk_data->isorxlock); 1244 1245 __set_mtk_intr_interface(hdev); 1246 1247 err = btmtk_submit_intr_urb(hdev, GFP_KERNEL); 1248 if (err < 0) { 1249 usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor); 1250 bt_dev_err(hdev, "ISO intf not support (%d)", err); 1251 return err; 1252 } 1253 1254 skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), iso_param, 1255 HCI_INIT_TIMEOUT); 1256 if (IS_ERR(skb)) { 1257 bt_dev_err(hdev, "Failed to apply iso setting (%ld)", PTR_ERR(skb)); 1258 return PTR_ERR(skb); 1259 } 1260 kfree_skb(skb); 1261 1262 return 0; 1263 } 1264 1265 int btmtk_usb_resume(struct hci_dev *hdev) 1266 { 1267 /* This function describes the specific additional steps taken by MediaTek 1268 * when Bluetooth usb driver's resume function is called. 1269 */ 1270 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1271 1272 /* Resubmit urb for iso data transmission */ 1273 if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) { 1274 if (btmtk_submit_intr_urb(hdev, GFP_NOIO) < 0) 1275 clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags); 1276 } 1277 1278 return 0; 1279 } 1280 EXPORT_SYMBOL_GPL(btmtk_usb_resume); 1281 1282 int btmtk_usb_suspend(struct hci_dev *hdev) 1283 { 1284 /* This function describes the specific additional steps taken by MediaTek 1285 * when Bluetooth usb driver's suspend function is called. 1286 */ 1287 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1288 1289 /* Stop urb anchor for iso data transmission */ 1290 if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) 1291 usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor); 1292 1293 return 0; 1294 } 1295 EXPORT_SYMBOL_GPL(btmtk_usb_suspend); 1296 1297 int btmtk_usb_setup(struct hci_dev *hdev) 1298 { 1299 struct btmtk_data *btmtk_data = hci_get_priv(hdev); 1300 struct btmtk_hci_wmt_params wmt_params; 1301 ktime_t calltime, delta, rettime; 1302 struct btmtk_tci_sleep tci_sleep; 1303 unsigned long long duration; 1304 struct sk_buff *skb; 1305 const char *fwname; 1306 int err, status; 1307 u32 dev_id = 0; 1308 char fw_bin_name[64]; 1309 u32 fw_version = 0, fw_flavor = 0; 1310 u8 param; 1311 1312 calltime = ktime_get(); 1313 1314 err = btmtk_usb_id_get(hdev, 0x80000008, &dev_id); 1315 if (err) { 1316 bt_dev_err(hdev, "Failed to get device id (%d)", err); 1317 return err; 1318 } 1319 1320 if (!dev_id || dev_id != 0x7663) { 1321 err = btmtk_usb_id_get(hdev, 0x70010200, &dev_id); 1322 if (err) { 1323 bt_dev_err(hdev, "Failed to get device id (%d)", err); 1324 return err; 1325 } 1326 err = btmtk_usb_id_get(hdev, 0x80021004, &fw_version); 1327 if (err) { 1328 bt_dev_err(hdev, "Failed to get fw version (%d)", err); 1329 return err; 1330 } 1331 err = btmtk_usb_id_get(hdev, 0x70010020, &fw_flavor); 1332 if (err) { 1333 bt_dev_err(hdev, "Failed to get fw flavor (%d)", err); 1334 return err; 1335 } 1336 fw_flavor = (fw_flavor & 0x00000080) >> 7; 1337 } 1338 1339 if (!dev_id) { 1340 u16 vid = le16_to_cpu(btmtk_data->udev->descriptor.idVendor); 1341 u16 pid = le16_to_cpu(btmtk_data->udev->descriptor.idProduct); 1342 int i; 1343 1344 for (i = 0; i < ARRAY_SIZE(btmtk_mt6639_devs); i++) { 1345 if (vid == btmtk_mt6639_devs[i].vendor && 1346 pid == btmtk_mt6639_devs[i].product) { 1347 dev_id = 0x6639; 1348 break; 1349 } 1350 } 1351 1352 if (dev_id) 1353 bt_dev_info(hdev, "MT6639: CHIPID=0x0000 with VID=%04x PID=%04x, using 0x6639", 1354 vid, pid); 1355 } 1356 1357 btmtk_data->dev_id = dev_id; 1358 1359 err = btmtk_register_coredump(hdev, btmtk_data->drv_name, fw_version); 1360 if (err < 0) 1361 bt_dev_err(hdev, "Failed to register coredump (%d)", err); 1362 1363 switch (dev_id) { 1364 case 0x7663: 1365 fwname = FIRMWARE_MT7663; 1366 break; 1367 case 0x7668: 1368 fwname = FIRMWARE_MT7668; 1369 break; 1370 case 0x7922: 1371 case 0x7925: 1372 /* 1373 * A remote wakeup could cause the device completely unresponsive, and 1374 * recovering from such a state needs a power cycle. 1375 * 1376 * Since the remote wakeup capability is super broken, just disable it 1377 * to get rid of the troubles. The device can still be autosuspended 1378 * when the bluetooth interface is closed. 1379 */ 1380 device_set_wakeup_capable(&btmtk_data->udev->dev, false); 1381 fallthrough; 1382 case 0x7961: 1383 case 0x7902: 1384 case 0x6639: 1385 btmtk_fw_get_filename(fw_bin_name, sizeof(fw_bin_name), dev_id, 1386 fw_version, fw_flavor); 1387 1388 err = btmtk_setup_firmware_79xx(hdev, fw_bin_name, 1389 btmtk_usb_hci_wmt_sync, 1390 dev_id); 1391 if (err < 0) { 1392 /* retry once if setup firmware error */ 1393 if (!test_and_set_bit(BTMTK_FIRMWARE_DL_RETRY, &btmtk_data->flags)) 1394 btmtk_reset_sync(hdev); 1395 bt_dev_err(hdev, "Failed to set up firmware (%d)", err); 1396 return err; 1397 } 1398 1399 /* It's Device EndPoint Reset Option Register */ 1400 err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 1401 MTK_EP_RST_IN_OUT_OPT); 1402 if (err < 0) 1403 return err; 1404 1405 /* Enable Bluetooth protocol */ 1406 param = 1; 1407 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 1408 wmt_params.flag = 0; 1409 wmt_params.dlen = sizeof(param); 1410 wmt_params.data = ¶m; 1411 wmt_params.status = NULL; 1412 1413 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); 1414 if (err < 0) { 1415 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 1416 return err; 1417 } 1418 1419 hci_set_msft_opcode(hdev, 0xFD30); 1420 hci_set_aosp_capable(hdev); 1421 1422 /* Clear BTMTK_FIRMWARE_DL_RETRY if setup successfully */ 1423 test_and_clear_bit(BTMTK_FIRMWARE_DL_RETRY, &btmtk_data->flags); 1424 1425 /* Set up ISO interface after protocol enabled */ 1426 if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) { 1427 if (!btmtk_usb_isointf_init(hdev)) 1428 set_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags); 1429 } 1430 1431 goto done; 1432 default: 1433 bt_dev_err(hdev, "Unsupported hardware variant (%08x)", 1434 dev_id); 1435 return -ENODEV; 1436 } 1437 1438 /* Query whether the firmware is already download */ 1439 wmt_params.op = BTMTK_WMT_SEMAPHORE; 1440 wmt_params.flag = 1; 1441 wmt_params.dlen = 0; 1442 wmt_params.data = NULL; 1443 wmt_params.status = &status; 1444 1445 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); 1446 if (err < 0) { 1447 bt_dev_err(hdev, "Failed to query firmware status (%d)", err); 1448 return err; 1449 } 1450 1451 if (status == BTMTK_WMT_PATCH_DONE) { 1452 bt_dev_info(hdev, "firmware already downloaded"); 1453 goto ignore_setup_fw; 1454 } 1455 1456 /* Setup a firmware which the device definitely requires */ 1457 err = btmtk_setup_firmware(hdev, fwname, 1458 btmtk_usb_hci_wmt_sync); 1459 if (err < 0) 1460 return err; 1461 1462 ignore_setup_fw: 1463 err = readx_poll_timeout(btmtk_usb_func_query, hdev, status, 1464 status < 0 || status != BTMTK_WMT_ON_PROGRESS, 1465 2000, 5000000); 1466 /* -ETIMEDOUT happens */ 1467 if (err < 0) 1468 return err; 1469 1470 /* The other errors happen in btmtk_usb_func_query */ 1471 if (status < 0) 1472 return status; 1473 1474 if (status == BTMTK_WMT_ON_DONE) { 1475 bt_dev_info(hdev, "function already on"); 1476 goto ignore_func_on; 1477 } 1478 1479 /* Enable Bluetooth protocol */ 1480 param = 1; 1481 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 1482 wmt_params.flag = 0; 1483 wmt_params.dlen = sizeof(param); 1484 wmt_params.data = ¶m; 1485 wmt_params.status = NULL; 1486 1487 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); 1488 if (err < 0) { 1489 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 1490 return err; 1491 } 1492 1493 ignore_func_on: 1494 /* Apply the low power environment setup */ 1495 tci_sleep.mode = 0x5; 1496 tci_sleep.duration = cpu_to_le16(0x640); 1497 tci_sleep.host_duration = cpu_to_le16(0x640); 1498 tci_sleep.host_wakeup_pin = 0; 1499 tci_sleep.time_compensation = 0; 1500 1501 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep, 1502 HCI_INIT_TIMEOUT); 1503 if (IS_ERR(skb)) { 1504 err = PTR_ERR(skb); 1505 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err); 1506 return err; 1507 } 1508 kfree_skb(skb); 1509 1510 done: 1511 rettime = ktime_get(); 1512 delta = ktime_sub(rettime, calltime); 1513 duration = (unsigned long long)ktime_to_ns(delta) >> 10; 1514 1515 bt_dev_info(hdev, "Device setup in %llu usecs", duration); 1516 1517 return 0; 1518 } 1519 EXPORT_SYMBOL_GPL(btmtk_usb_setup); 1520 1521 int btmtk_usb_shutdown(struct hci_dev *hdev) 1522 { 1523 struct btmtk_data *data = hci_get_priv(hdev); 1524 struct btmtk_hci_wmt_params wmt_params; 1525 u8 param = 0; 1526 int err; 1527 1528 err = usb_autopm_get_interface(data->intf); 1529 if (err < 0) 1530 return err; 1531 1532 /* Disable the device */ 1533 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 1534 wmt_params.flag = 0; 1535 wmt_params.dlen = sizeof(param); 1536 wmt_params.data = ¶m; 1537 wmt_params.status = NULL; 1538 1539 err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params); 1540 if (err < 0) { 1541 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 1542 usb_autopm_put_interface(data->intf); 1543 return err; 1544 } 1545 1546 usb_autopm_put_interface(data->intf); 1547 return 0; 1548 } 1549 EXPORT_SYMBOL_GPL(btmtk_usb_shutdown); 1550 1551 int btmtk_recv_event(struct hci_dev *hdev, struct sk_buff *skb) 1552 { 1553 struct hci_event_hdr *hdr = (void *)skb->data; 1554 struct hci_ev_cmd_complete *ec; 1555 1556 if (hdr->evt == HCI_EV_CMD_COMPLETE && 1557 skb->len >= HCI_EVENT_HDR_SIZE + sizeof(*ec)) { 1558 u16 opcode; 1559 1560 ec = (void *)(skb->data + HCI_EVENT_HDR_SIZE); 1561 opcode = __le16_to_cpu(ec->opcode); 1562 1563 /* Filter vendor opcode */ 1564 if (opcode == 0xfc5d) { 1565 kfree_skb(skb); 1566 return 0; 1567 } 1568 } 1569 1570 return hci_recv_frame(hdev, skb); 1571 } 1572 EXPORT_SYMBOL_GPL(btmtk_recv_event); 1573 #endif 1574 1575 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); 1576 MODULE_AUTHOR("Mark Chen <mark-yw.chen@mediatek.com>"); 1577 MODULE_DESCRIPTION("Bluetooth support for MediaTek devices ver " VERSION); 1578 MODULE_VERSION(VERSION); 1579 MODULE_LICENSE("GPL"); 1580 MODULE_FIRMWARE(FIRMWARE_MT7622); 1581 MODULE_FIRMWARE(FIRMWARE_MT7663); 1582 MODULE_FIRMWARE(FIRMWARE_MT7668); 1583 MODULE_FIRMWARE(FIRMWARE_MT7922); 1584 MODULE_FIRMWARE(FIRMWARE_MT7961); 1585 MODULE_FIRMWARE(FIRMWARE_MT7925); 1586 MODULE_FIRMWARE(FIRMWARE_MT7927); 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