1 // SPDX-License-Identifier: (GPL-2.0-only OR MIT) 2 /* 3 * Copyright (C) 2024 Amlogic, Inc. All rights reserved 4 */ 5 6 #include <linux/kernel.h> 7 #include <linux/delay.h> 8 #include <linux/device.h> 9 #include <linux/property.h> 10 #include <linux/of.h> 11 #include <linux/serdev.h> 12 #include <linux/clk.h> 13 #include <linux/firmware.h> 14 #include <linux/gpio/consumer.h> 15 #include <linux/regulator/consumer.h> 16 #include <net/bluetooth/bluetooth.h> 17 #include <net/bluetooth/hci_core.h> 18 #include <net/bluetooth/hci.h> 19 20 #include "hci_uart.h" 21 22 #define AML_EVT_HEAD_SIZE 4 23 #define AML_BDADDR_DEFAULT (&(bdaddr_t) {{ 0x00, 0xff, 0x00, 0x22, 0x2d, 0xae }}) 24 25 #define AML_FIRMWARE_OPERATION_SIZE (248) 26 #define AML_FIRMWARE_MAX_SIZE (512 * 1024) 27 28 /* TCI command */ 29 #define AML_TCI_CMD_READ 0xFEF0 30 #define AML_TCI_CMD_WRITE 0xFEF1 31 #define AML_TCI_CMD_UPDATE_BAUDRATE 0xFEF2 32 #define AML_TCI_CMD_HARDWARE_RESET 0xFEF2 33 #define AML_TCI_CMD_DOWNLOAD_BT_FW 0xFEF3 34 35 /* Vendor command */ 36 #define AML_BT_HCI_VENDOR_CMD 0xFC1A 37 38 /* TCI operation parameter in controller chip */ 39 #define AML_OP_UART_MODE 0x00A30128 40 #define AML_OP_EVT_ENABLE 0x00A70014 41 #define AML_OP_MEM_HARD_TRANS_EN 0x00A7000C 42 #define AML_OP_RF_CFG 0x00F03040 43 #define AML_OP_RAM_POWER_CTR 0x00F03050 44 #define AML_OP_HARDWARE_RST 0x00F03058 45 #define AML_OP_ICCM_RAM_BASE 0x00000000 46 #define AML_OP_DCCM_RAM_BASE 0x00D00000 47 48 /* UART configuration */ 49 #define AML_UART_XMIT_EN BIT(12) 50 #define AML_UART_RECV_EN BIT(13) 51 #define AML_UART_TIMEOUT_INT_EN BIT(14) 52 #define AML_UART_CLK_SOURCE 40000000 53 54 /* Controller event */ 55 #define AML_EVT_EN BIT(24) 56 57 /* RAM power control */ 58 #define AML_RAM_POWER_ON (0) 59 #define AML_RAM_POWER_OFF (1) 60 61 /* RF configuration */ 62 #define AML_RF_ANT_SINGLE BIT(28) 63 #define AML_RF_ANT_DOUBLE BIT(29) 64 65 /* Memory transaction */ 66 #define AML_MM_CTR_HARD_TRAS_EN BIT(27) 67 68 /* Controller reset */ 69 #define AML_CTR_CPU_RESET BIT(8) 70 #define AML_CTR_MAC_RESET BIT(9) 71 #define AML_CTR_PHY_RESET BIT(10) 72 73 enum { 74 FW_ICCM, 75 FW_DCCM 76 }; 77 78 struct aml_fw_len { 79 u32 iccm_len; 80 u32 dccm_len; 81 }; 82 83 struct aml_tci_rsp { 84 u8 num_cmd_packet; 85 u16 opcode; 86 u8 status; 87 } __packed; 88 89 struct aml_device_data { 90 int iccm_offset; 91 int dccm_offset; 92 bool is_coex; 93 }; 94 95 struct aml_serdev { 96 struct hci_uart serdev_hu; 97 struct device *dev; 98 struct gpio_desc *bt_en_gpio; 99 struct regulator *bt_supply; 100 struct clk *lpo_clk; 101 const struct aml_device_data *aml_dev_data; 102 const char *firmware_name; 103 }; 104 105 struct aml_data { 106 struct sk_buff *rx_skb; 107 struct sk_buff_head txq; 108 }; 109 110 static const struct h4_recv_pkt aml_recv_pkts[] = { 111 { H4_RECV_ACL, .recv = hci_recv_frame }, 112 { H4_RECV_SCO, .recv = hci_recv_frame }, 113 { H4_RECV_EVENT, .recv = hci_recv_frame }, 114 { H4_RECV_ISO, .recv = hci_recv_frame }, 115 }; 116 117 /* The TCI command is a private command, which is for setting baud rate, 118 * downloading firmware, initiating RAM. 119 * 120 * op_code | op_len | op_addr | parameter | 121 * --------|-----------------------|---------|-------------| 122 * 2B | 1B len(addr+param) | 4B | len(param) | 123 */ 124 static int aml_send_tci_cmd(struct hci_dev *hdev, u16 op_code, u32 op_addr, 125 u32 *param, u32 param_len) 126 { 127 struct aml_tci_rsp *rsp = NULL; 128 struct sk_buff *skb = NULL; 129 size_t buf_len = 0; 130 u8 *buf = NULL; 131 int err = 0; 132 133 buf_len = sizeof(op_addr) + param_len; 134 buf = kmalloc(buf_len, GFP_KERNEL); 135 if (!buf) 136 return -ENOMEM; 137 138 memcpy(buf, &op_addr, sizeof(op_addr)); 139 if (param && param_len > 0) 140 memcpy(buf + sizeof(op_addr), param, param_len); 141 142 skb = __hci_cmd_sync_ev(hdev, op_code, buf_len, buf, 143 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); 144 if (IS_ERR(skb)) { 145 err = PTR_ERR(skb); 146 bt_dev_err(hdev, "Failed to send TCI cmd (error: %d)", err); 147 goto exit; 148 } 149 150 rsp = skb_pull_data(skb, sizeof(struct aml_tci_rsp)); 151 if (!rsp) 152 goto skb_free; 153 154 if (rsp->opcode != op_code || rsp->status != 0x00) { 155 bt_dev_err(hdev, "send TCI cmd (0x%04X), response (0x%04X):(%d)", 156 op_code, rsp->opcode, rsp->status); 157 err = -EINVAL; 158 goto skb_free; 159 } 160 161 skb_free: 162 kfree_skb(skb); 163 164 exit: 165 kfree(buf); 166 return err; 167 } 168 169 static int aml_update_chip_baudrate(struct hci_dev *hdev, u32 baud) 170 { 171 u32 value; 172 173 value = ((AML_UART_CLK_SOURCE / baud) - 1) & 0x0FFF; 174 value |= AML_UART_XMIT_EN | AML_UART_RECV_EN | AML_UART_TIMEOUT_INT_EN; 175 176 return aml_send_tci_cmd(hdev, AML_TCI_CMD_UPDATE_BAUDRATE, 177 AML_OP_UART_MODE, &value, sizeof(value)); 178 } 179 180 static int aml_start_chip(struct hci_dev *hdev) 181 { 182 u32 value = 0; 183 int ret; 184 185 value = AML_MM_CTR_HARD_TRAS_EN; 186 ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, 187 AML_OP_MEM_HARD_TRANS_EN, 188 &value, sizeof(value)); 189 if (ret) 190 return ret; 191 192 /* controller hardware reset */ 193 value = AML_CTR_CPU_RESET | AML_CTR_MAC_RESET | AML_CTR_PHY_RESET; 194 ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_HARDWARE_RESET, 195 AML_OP_HARDWARE_RST, 196 &value, sizeof(value)); 197 return ret; 198 } 199 200 static int aml_send_firmware_segment(struct hci_dev *hdev, 201 u8 fw_type, 202 u8 *seg, 203 u32 seg_size, 204 u32 offset) 205 { 206 u32 op_addr = 0; 207 208 if (fw_type == FW_ICCM) 209 op_addr = AML_OP_ICCM_RAM_BASE + offset; 210 else if (fw_type == FW_DCCM) 211 op_addr = AML_OP_DCCM_RAM_BASE + offset; 212 213 return aml_send_tci_cmd(hdev, AML_TCI_CMD_DOWNLOAD_BT_FW, 214 op_addr, (u32 *)seg, seg_size); 215 } 216 217 static int aml_send_firmware(struct hci_dev *hdev, u8 fw_type, 218 u8 *fw, u32 fw_size, u32 offset) 219 { 220 u32 seg_size = 0; 221 u32 seg_off = 0; 222 223 if (fw_size > AML_FIRMWARE_MAX_SIZE) { 224 bt_dev_err(hdev, 225 "Firmware size %d kB is larger than the maximum of 512 kB. Aborting.", 226 fw_size); 227 return -EINVAL; 228 } 229 while (fw_size > 0) { 230 seg_size = (fw_size > AML_FIRMWARE_OPERATION_SIZE) ? 231 AML_FIRMWARE_OPERATION_SIZE : fw_size; 232 if (aml_send_firmware_segment(hdev, fw_type, (fw + seg_off), 233 seg_size, offset)) { 234 bt_dev_err(hdev, "Failed send firmware, type: %d, offset: 0x%x", 235 fw_type, offset); 236 return -EINVAL; 237 } 238 seg_off += seg_size; 239 fw_size -= seg_size; 240 offset += seg_size; 241 } 242 return 0; 243 } 244 245 static int aml_download_firmware(struct hci_dev *hdev, const char *fw_name) 246 { 247 struct hci_uart *hu = hci_get_drvdata(hdev); 248 struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); 249 const struct firmware *firmware = NULL; 250 struct aml_fw_len *fw_len = NULL; 251 u8 *iccm_start = NULL, *dccm_start = NULL; 252 u32 iccm_len, dccm_len; 253 u32 value = 0; 254 int ret = 0; 255 256 /* Enable firmware download event */ 257 value = AML_EVT_EN; 258 ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, 259 AML_OP_EVT_ENABLE, 260 &value, sizeof(value)); 261 if (ret) 262 goto exit; 263 264 /* RAM power on */ 265 value = AML_RAM_POWER_ON; 266 ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, 267 AML_OP_RAM_POWER_CTR, 268 &value, sizeof(value)); 269 if (ret) 270 goto exit; 271 272 /* Check RAM power status */ 273 ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_READ, 274 AML_OP_RAM_POWER_CTR, NULL, 0); 275 if (ret) 276 goto exit; 277 278 ret = request_firmware(&firmware, fw_name, &hdev->dev); 279 if (ret < 0) { 280 bt_dev_err(hdev, "Failed to load <%s>:(%d)", fw_name, ret); 281 goto exit; 282 } 283 284 fw_len = (struct aml_fw_len *)firmware->data; 285 286 /* Download ICCM */ 287 iccm_start = (u8 *)(firmware->data) + sizeof(struct aml_fw_len) 288 + amldev->aml_dev_data->iccm_offset; 289 iccm_len = fw_len->iccm_len - amldev->aml_dev_data->iccm_offset; 290 ret = aml_send_firmware(hdev, FW_ICCM, iccm_start, iccm_len, 291 amldev->aml_dev_data->iccm_offset); 292 if (ret) { 293 bt_dev_err(hdev, "Failed to send FW_ICCM (%d)", ret); 294 goto exit; 295 } 296 297 /* Download DCCM */ 298 dccm_start = (u8 *)(firmware->data) + sizeof(struct aml_fw_len) + fw_len->iccm_len; 299 dccm_len = fw_len->dccm_len; 300 ret = aml_send_firmware(hdev, FW_DCCM, dccm_start, dccm_len, 301 amldev->aml_dev_data->dccm_offset); 302 if (ret) { 303 bt_dev_err(hdev, "Failed to send FW_DCCM (%d)", ret); 304 goto exit; 305 } 306 307 /* Disable firmware download event */ 308 value = 0; 309 ret = aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, 310 AML_OP_EVT_ENABLE, 311 &value, sizeof(value)); 312 if (ret) 313 goto exit; 314 315 exit: 316 release_firmware(firmware); 317 return ret; 318 } 319 320 static int aml_send_reset(struct hci_dev *hdev) 321 { 322 struct sk_buff *skb; 323 int err; 324 325 skb = __hci_cmd_sync_ev(hdev, HCI_OP_RESET, 0, NULL, 326 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); 327 if (IS_ERR(skb)) { 328 err = PTR_ERR(skb); 329 bt_dev_err(hdev, "Failed to send hci reset cmd (%d)", err); 330 return err; 331 } 332 333 kfree_skb(skb); 334 return 0; 335 } 336 337 static int aml_dump_fw_version(struct hci_dev *hdev) 338 { 339 struct aml_tci_rsp *rsp = NULL; 340 struct sk_buff *skb; 341 u8 value[6] = {0}; 342 u8 *fw_ver = NULL; 343 int err = 0; 344 345 skb = __hci_cmd_sync_ev(hdev, AML_BT_HCI_VENDOR_CMD, sizeof(value), value, 346 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); 347 if (IS_ERR(skb)) { 348 err = PTR_ERR(skb); 349 bt_dev_err(hdev, "Failed to get fw version (error: %d)", err); 350 return err; 351 } 352 353 rsp = skb_pull_data(skb, sizeof(struct aml_tci_rsp)); 354 if (!rsp) 355 goto exit; 356 357 if (rsp->opcode != AML_BT_HCI_VENDOR_CMD || rsp->status != 0x00) { 358 bt_dev_err(hdev, "dump version, error response (0x%04X):(%d)", 359 rsp->opcode, rsp->status); 360 err = -EINVAL; 361 goto exit; 362 } 363 364 fw_ver = (u8 *)rsp + AML_EVT_HEAD_SIZE; 365 bt_dev_info(hdev, "fw_version: date = %02x.%02x, number = 0x%02x%02x", 366 *(fw_ver + 1), *fw_ver, *(fw_ver + 3), *(fw_ver + 2)); 367 368 exit: 369 kfree_skb(skb); 370 return err; 371 } 372 373 static int aml_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 374 { 375 struct aml_tci_rsp *rsp = NULL; 376 struct sk_buff *skb; 377 int err = 0; 378 379 bt_dev_info(hdev, "set bdaddr (%pM)", bdaddr); 380 skb = __hci_cmd_sync_ev(hdev, AML_BT_HCI_VENDOR_CMD, 381 sizeof(bdaddr_t), bdaddr, 382 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); 383 if (IS_ERR(skb)) { 384 err = PTR_ERR(skb); 385 bt_dev_err(hdev, "Failed to set bdaddr (error: %d)", err); 386 return err; 387 } 388 389 rsp = skb_pull_data(skb, sizeof(struct aml_tci_rsp)); 390 if (!rsp) 391 goto exit; 392 393 if (rsp->opcode != AML_BT_HCI_VENDOR_CMD || rsp->status != 0x00) { 394 bt_dev_err(hdev, "error response (0x%x):(%d)", rsp->opcode, rsp->status); 395 err = -EINVAL; 396 goto exit; 397 } 398 399 exit: 400 kfree_skb(skb); 401 return err; 402 } 403 404 static int aml_check_bdaddr(struct hci_dev *hdev) 405 { 406 struct hci_rp_read_bd_addr *paddr; 407 struct sk_buff *skb; 408 int err; 409 410 if (bacmp(&hdev->public_addr, BDADDR_ANY)) 411 return 0; 412 413 skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL, 414 HCI_INIT_TIMEOUT); 415 if (IS_ERR(skb)) { 416 err = PTR_ERR(skb); 417 bt_dev_err(hdev, "Failed to read bdaddr (error: %d)", err); 418 return err; 419 } 420 421 paddr = skb_pull_data(skb, sizeof(struct hci_rp_read_bd_addr)); 422 if (!paddr) 423 goto exit; 424 425 if (!bacmp(&paddr->bdaddr, AML_BDADDR_DEFAULT)) { 426 bt_dev_info(hdev, "amlbt using default bdaddr (%pM)", &paddr->bdaddr); 427 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); 428 } 429 430 exit: 431 kfree_skb(skb); 432 return 0; 433 } 434 435 static int aml_config_rf(struct hci_dev *hdev, bool is_coex) 436 { 437 u32 value = AML_RF_ANT_DOUBLE; 438 439 /* Use a single antenna when co-existing with wifi */ 440 if (is_coex) 441 value = AML_RF_ANT_SINGLE; 442 443 return aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, 444 AML_OP_RF_CFG, 445 &value, sizeof(value)); 446 } 447 448 static int aml_parse_dt(struct aml_serdev *amldev) 449 { 450 struct device *pdev = amldev->dev; 451 452 amldev->bt_en_gpio = devm_gpiod_get(pdev, "enable", 453 GPIOD_OUT_LOW); 454 if (IS_ERR(amldev->bt_en_gpio)) { 455 dev_err(pdev, "Failed to acquire enable gpios"); 456 return PTR_ERR(amldev->bt_en_gpio); 457 } 458 459 if (device_property_read_string(pdev, "firmware-name", 460 &amldev->firmware_name)) { 461 dev_err(pdev, "Failed to acquire firmware path"); 462 return -ENODEV; 463 } 464 465 amldev->bt_supply = devm_regulator_get(pdev, "vddio"); 466 if (IS_ERR(amldev->bt_supply)) { 467 dev_err(pdev, "Failed to acquire regulator"); 468 return PTR_ERR(amldev->bt_supply); 469 } 470 471 amldev->lpo_clk = devm_clk_get(pdev, NULL); 472 if (IS_ERR(amldev->lpo_clk)) { 473 dev_err(pdev, "Failed to acquire clock source"); 474 return PTR_ERR(amldev->lpo_clk); 475 } 476 477 return 0; 478 } 479 480 static int aml_power_on(struct aml_serdev *amldev) 481 { 482 int err; 483 484 err = regulator_enable(amldev->bt_supply); 485 if (err) { 486 dev_err(amldev->dev, "Failed to enable regulator: (%d)", err); 487 return err; 488 } 489 490 err = clk_prepare_enable(amldev->lpo_clk); 491 if (err) { 492 dev_err(amldev->dev, "Failed to enable lpo clock: (%d)", err); 493 return err; 494 } 495 496 gpiod_set_value_cansleep(amldev->bt_en_gpio, 1); 497 498 /* Wait 20ms for bluetooth controller power on */ 499 msleep(20); 500 return 0; 501 } 502 503 static int aml_power_off(struct aml_serdev *amldev) 504 { 505 gpiod_set_value_cansleep(amldev->bt_en_gpio, 0); 506 507 clk_disable_unprepare(amldev->lpo_clk); 508 509 regulator_disable(amldev->bt_supply); 510 511 return 0; 512 } 513 514 static int aml_set_baudrate(struct hci_uart *hu, unsigned int speed) 515 { 516 /* update controller baudrate */ 517 if (aml_update_chip_baudrate(hu->hdev, speed) != 0) { 518 bt_dev_err(hu->hdev, "Failed to update baud rate"); 519 return -EINVAL; 520 } 521 522 /* update local baudrate */ 523 serdev_device_set_baudrate(hu->serdev, speed); 524 525 return 0; 526 } 527 528 /* Initialize protocol */ 529 static int aml_open(struct hci_uart *hu) 530 { 531 struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); 532 struct aml_data *aml_data; 533 int err; 534 535 err = aml_parse_dt(amldev); 536 if (err) 537 return err; 538 539 if (!hci_uart_has_flow_control(hu)) { 540 bt_dev_err(hu->hdev, "no flow control"); 541 return -EOPNOTSUPP; 542 } 543 544 aml_data = kzalloc(sizeof(*aml_data), GFP_KERNEL); 545 if (!aml_data) 546 return -ENOMEM; 547 548 skb_queue_head_init(&aml_data->txq); 549 550 hu->priv = aml_data; 551 552 return 0; 553 } 554 555 static int aml_close(struct hci_uart *hu) 556 { 557 struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); 558 struct aml_data *aml_data = hu->priv; 559 560 skb_queue_purge(&aml_data->txq); 561 kfree_skb(aml_data->rx_skb); 562 kfree(aml_data); 563 564 hu->priv = NULL; 565 566 return aml_power_off(amldev); 567 } 568 569 static int aml_flush(struct hci_uart *hu) 570 { 571 struct aml_data *aml_data = hu->priv; 572 573 skb_queue_purge(&aml_data->txq); 574 575 return 0; 576 } 577 578 static int aml_setup(struct hci_uart *hu) 579 { 580 struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); 581 struct hci_dev *hdev = amldev->serdev_hu.hdev; 582 int err; 583 584 /* Setup bdaddr */ 585 hdev->set_bdaddr = aml_set_bdaddr; 586 587 err = aml_power_on(amldev); 588 if (err) 589 return err; 590 591 err = aml_set_baudrate(hu, amldev->serdev_hu.proto->oper_speed); 592 if (err) 593 return err; 594 595 err = aml_download_firmware(hdev, amldev->firmware_name); 596 if (err) 597 return err; 598 599 err = aml_config_rf(hdev, amldev->aml_dev_data->is_coex); 600 if (err) 601 return err; 602 603 err = aml_start_chip(hdev); 604 if (err) 605 return err; 606 607 /* Wait 60ms for controller startup */ 608 msleep(60); 609 610 err = aml_dump_fw_version(hdev); 611 if (err) 612 return err; 613 614 err = aml_send_reset(hdev); 615 if (err) 616 return err; 617 618 err = aml_check_bdaddr(hdev); 619 if (err) 620 return err; 621 622 return 0; 623 } 624 625 static int aml_enqueue(struct hci_uart *hu, struct sk_buff *skb) 626 { 627 struct aml_data *aml_data = hu->priv; 628 629 skb_queue_tail(&aml_data->txq, skb); 630 631 return 0; 632 } 633 634 static struct sk_buff *aml_dequeue(struct hci_uart *hu) 635 { 636 struct aml_data *aml_data = hu->priv; 637 struct sk_buff *skb; 638 639 skb = skb_dequeue(&aml_data->txq); 640 641 /* Prepend skb with frame type */ 642 if (skb) 643 memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); 644 645 return skb; 646 } 647 648 static int aml_recv(struct hci_uart *hu, const void *data, int count) 649 { 650 struct aml_data *aml_data = hu->priv; 651 int err; 652 653 aml_data->rx_skb = h4_recv_buf(hu->hdev, aml_data->rx_skb, data, count, 654 aml_recv_pkts, 655 ARRAY_SIZE(aml_recv_pkts)); 656 if (IS_ERR(aml_data->rx_skb)) { 657 err = PTR_ERR(aml_data->rx_skb); 658 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 659 aml_data->rx_skb = NULL; 660 return err; 661 } 662 663 return count; 664 } 665 666 static const struct hci_uart_proto aml_hci_proto = { 667 .id = HCI_UART_AML, 668 .name = "AML", 669 .init_speed = 115200, 670 .oper_speed = 4000000, 671 .open = aml_open, 672 .close = aml_close, 673 .setup = aml_setup, 674 .flush = aml_flush, 675 .recv = aml_recv, 676 .enqueue = aml_enqueue, 677 .dequeue = aml_dequeue, 678 }; 679 680 static void aml_device_driver_shutdown(struct device *dev) 681 { 682 struct aml_serdev *amldev = dev_get_drvdata(dev); 683 684 aml_power_off(amldev); 685 } 686 687 static int aml_serdev_probe(struct serdev_device *serdev) 688 { 689 struct aml_serdev *amldev; 690 int err; 691 692 amldev = devm_kzalloc(&serdev->dev, sizeof(*amldev), GFP_KERNEL); 693 if (!amldev) 694 return -ENOMEM; 695 696 amldev->serdev_hu.serdev = serdev; 697 amldev->dev = &serdev->dev; 698 serdev_device_set_drvdata(serdev, amldev); 699 700 err = hci_uart_register_device(&amldev->serdev_hu, &aml_hci_proto); 701 if (err) 702 return dev_err_probe(amldev->dev, err, 703 "Failed to register hci uart device"); 704 705 amldev->aml_dev_data = device_get_match_data(&serdev->dev); 706 707 return 0; 708 } 709 710 static void aml_serdev_remove(struct serdev_device *serdev) 711 { 712 struct aml_serdev *amldev = serdev_device_get_drvdata(serdev); 713 714 hci_uart_unregister_device(&amldev->serdev_hu); 715 } 716 717 static const struct aml_device_data data_w155s2 = { 718 .iccm_offset = 256 * 1024, 719 }; 720 721 static const struct aml_device_data data_w265s2 = { 722 .iccm_offset = 384 * 1024, 723 }; 724 725 static const struct of_device_id aml_bluetooth_of_match[] = { 726 { .compatible = "amlogic,w155s2-bt", .data = &data_w155s2 }, 727 { .compatible = "amlogic,w265s2-bt", .data = &data_w265s2 }, 728 { /* sentinel */ }, 729 }; 730 MODULE_DEVICE_TABLE(of, aml_bluetooth_of_match); 731 732 static struct serdev_device_driver aml_serdev_driver = { 733 .probe = aml_serdev_probe, 734 .remove = aml_serdev_remove, 735 .driver = { 736 .name = "hci_uart_aml", 737 .of_match_table = aml_bluetooth_of_match, 738 .shutdown = aml_device_driver_shutdown, 739 }, 740 }; 741 742 int __init aml_init(void) 743 { 744 serdev_device_driver_register(&aml_serdev_driver); 745 746 return hci_uart_register_proto(&aml_hci_proto); 747 } 748 749 int __exit aml_deinit(void) 750 { 751 serdev_device_driver_unregister(&aml_serdev_driver); 752 753 return hci_uart_unregister_proto(&aml_hci_proto); 754 } 755