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 if (firmware) 317 release_firmware(firmware); 318 return ret; 319 } 320 321 static int aml_send_reset(struct hci_dev *hdev) 322 { 323 struct sk_buff *skb; 324 int err; 325 326 skb = __hci_cmd_sync_ev(hdev, HCI_OP_RESET, 0, NULL, 327 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); 328 if (IS_ERR(skb)) { 329 err = PTR_ERR(skb); 330 bt_dev_err(hdev, "Failed to send hci reset cmd (%d)", err); 331 return err; 332 } 333 334 kfree_skb(skb); 335 return 0; 336 } 337 338 static int aml_dump_fw_version(struct hci_dev *hdev) 339 { 340 struct aml_tci_rsp *rsp = NULL; 341 struct sk_buff *skb; 342 u8 value[6] = {0}; 343 u8 *fw_ver = NULL; 344 int err = 0; 345 346 skb = __hci_cmd_sync_ev(hdev, AML_BT_HCI_VENDOR_CMD, sizeof(value), value, 347 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); 348 if (IS_ERR(skb)) { 349 err = PTR_ERR(skb); 350 bt_dev_err(hdev, "Failed to get fw version (error: %d)", err); 351 return err; 352 } 353 354 rsp = skb_pull_data(skb, sizeof(struct aml_tci_rsp)); 355 if (!rsp) 356 goto exit; 357 358 if (rsp->opcode != AML_BT_HCI_VENDOR_CMD || rsp->status != 0x00) { 359 bt_dev_err(hdev, "dump version, error response (0x%04X):(%d)", 360 rsp->opcode, rsp->status); 361 err = -EINVAL; 362 goto exit; 363 } 364 365 fw_ver = (u8 *)rsp + AML_EVT_HEAD_SIZE; 366 bt_dev_info(hdev, "fw_version: date = %02x.%02x, number = 0x%02x%02x", 367 *(fw_ver + 1), *fw_ver, *(fw_ver + 3), *(fw_ver + 2)); 368 369 exit: 370 kfree_skb(skb); 371 return err; 372 } 373 374 static int aml_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 375 { 376 struct aml_tci_rsp *rsp = NULL; 377 struct sk_buff *skb; 378 int err = 0; 379 380 bt_dev_info(hdev, "set bdaddr (%pM)", bdaddr); 381 skb = __hci_cmd_sync_ev(hdev, AML_BT_HCI_VENDOR_CMD, 382 sizeof(bdaddr_t), bdaddr, 383 HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT); 384 if (IS_ERR(skb)) { 385 err = PTR_ERR(skb); 386 bt_dev_err(hdev, "Failed to set bdaddr (error: %d)", err); 387 return err; 388 } 389 390 rsp = skb_pull_data(skb, sizeof(struct aml_tci_rsp)); 391 if (!rsp) 392 goto exit; 393 394 if (rsp->opcode != AML_BT_HCI_VENDOR_CMD || rsp->status != 0x00) { 395 bt_dev_err(hdev, "error response (0x%x):(%d)", rsp->opcode, rsp->status); 396 err = -EINVAL; 397 goto exit; 398 } 399 400 exit: 401 kfree_skb(skb); 402 return err; 403 } 404 405 static int aml_check_bdaddr(struct hci_dev *hdev) 406 { 407 struct hci_rp_read_bd_addr *paddr; 408 struct sk_buff *skb; 409 int err; 410 411 if (bacmp(&hdev->public_addr, BDADDR_ANY)) 412 return 0; 413 414 skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL, 415 HCI_INIT_TIMEOUT); 416 if (IS_ERR(skb)) { 417 err = PTR_ERR(skb); 418 bt_dev_err(hdev, "Failed to read bdaddr (error: %d)", err); 419 return err; 420 } 421 422 paddr = skb_pull_data(skb, sizeof(struct hci_rp_read_bd_addr)); 423 if (!paddr) 424 goto exit; 425 426 if (!bacmp(&paddr->bdaddr, AML_BDADDR_DEFAULT)) { 427 bt_dev_info(hdev, "amlbt using default bdaddr (%pM)", &paddr->bdaddr); 428 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); 429 } 430 431 exit: 432 kfree_skb(skb); 433 return 0; 434 } 435 436 static int aml_config_rf(struct hci_dev *hdev, bool is_coex) 437 { 438 u32 value = AML_RF_ANT_DOUBLE; 439 440 /* Use a single antenna when co-existing with wifi */ 441 if (is_coex) 442 value = AML_RF_ANT_SINGLE; 443 444 return aml_send_tci_cmd(hdev, AML_TCI_CMD_WRITE, 445 AML_OP_RF_CFG, 446 &value, sizeof(value)); 447 } 448 449 static int aml_parse_dt(struct aml_serdev *amldev) 450 { 451 struct device *pdev = amldev->dev; 452 453 amldev->bt_en_gpio = devm_gpiod_get(pdev, "enable", 454 GPIOD_OUT_LOW); 455 if (IS_ERR(amldev->bt_en_gpio)) { 456 dev_err(pdev, "Failed to acquire enable gpios"); 457 return PTR_ERR(amldev->bt_en_gpio); 458 } 459 460 if (device_property_read_string(pdev, "firmware-name", 461 &amldev->firmware_name)) { 462 dev_err(pdev, "Failed to acquire firmware path"); 463 return -ENODEV; 464 } 465 466 amldev->bt_supply = devm_regulator_get(pdev, "vddio"); 467 if (IS_ERR(amldev->bt_supply)) { 468 dev_err(pdev, "Failed to acquire regulator"); 469 return PTR_ERR(amldev->bt_supply); 470 } 471 472 amldev->lpo_clk = devm_clk_get(pdev, NULL); 473 if (IS_ERR(amldev->lpo_clk)) { 474 dev_err(pdev, "Failed to acquire clock source"); 475 return PTR_ERR(amldev->lpo_clk); 476 } 477 478 return 0; 479 } 480 481 static int aml_power_on(struct aml_serdev *amldev) 482 { 483 int err; 484 485 err = regulator_enable(amldev->bt_supply); 486 if (err) { 487 dev_err(amldev->dev, "Failed to enable regulator: (%d)", err); 488 return err; 489 } 490 491 err = clk_prepare_enable(amldev->lpo_clk); 492 if (err) { 493 dev_err(amldev->dev, "Failed to enable lpo clock: (%d)", err); 494 return err; 495 } 496 497 gpiod_set_value_cansleep(amldev->bt_en_gpio, 1); 498 499 /* Wait 20ms for bluetooth controller power on */ 500 msleep(20); 501 return 0; 502 } 503 504 static int aml_power_off(struct aml_serdev *amldev) 505 { 506 gpiod_set_value_cansleep(amldev->bt_en_gpio, 0); 507 508 clk_disable_unprepare(amldev->lpo_clk); 509 510 regulator_disable(amldev->bt_supply); 511 512 return 0; 513 } 514 515 static int aml_set_baudrate(struct hci_uart *hu, unsigned int speed) 516 { 517 /* update controller baudrate */ 518 if (aml_update_chip_baudrate(hu->hdev, speed) != 0) { 519 bt_dev_err(hu->hdev, "Failed to update baud rate"); 520 return -EINVAL; 521 } 522 523 /* update local baudrate */ 524 serdev_device_set_baudrate(hu->serdev, speed); 525 526 return 0; 527 } 528 529 /* Initialize protocol */ 530 static int aml_open(struct hci_uart *hu) 531 { 532 struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); 533 struct aml_data *aml_data; 534 int err; 535 536 err = aml_parse_dt(amldev); 537 if (err) 538 return err; 539 540 if (!hci_uart_has_flow_control(hu)) { 541 bt_dev_err(hu->hdev, "no flow control"); 542 return -EOPNOTSUPP; 543 } 544 545 aml_data = kzalloc(sizeof(*aml_data), GFP_KERNEL); 546 if (!aml_data) 547 return -ENOMEM; 548 549 skb_queue_head_init(&aml_data->txq); 550 551 hu->priv = aml_data; 552 553 return 0; 554 } 555 556 static int aml_close(struct hci_uart *hu) 557 { 558 struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); 559 struct aml_data *aml_data = hu->priv; 560 561 skb_queue_purge(&aml_data->txq); 562 kfree_skb(aml_data->rx_skb); 563 kfree(aml_data); 564 565 hu->priv = NULL; 566 567 return aml_power_off(amldev); 568 } 569 570 static int aml_flush(struct hci_uart *hu) 571 { 572 struct aml_data *aml_data = hu->priv; 573 574 skb_queue_purge(&aml_data->txq); 575 576 return 0; 577 } 578 579 static int aml_setup(struct hci_uart *hu) 580 { 581 struct aml_serdev *amldev = serdev_device_get_drvdata(hu->serdev); 582 struct hci_dev *hdev = amldev->serdev_hu.hdev; 583 int err; 584 585 /* Setup bdaddr */ 586 hdev->set_bdaddr = aml_set_bdaddr; 587 588 err = aml_power_on(amldev); 589 if (err) 590 return err; 591 592 err = aml_set_baudrate(hu, amldev->serdev_hu.proto->oper_speed); 593 if (err) 594 return err; 595 596 err = aml_download_firmware(hdev, amldev->firmware_name); 597 if (err) 598 return err; 599 600 err = aml_config_rf(hdev, amldev->aml_dev_data->is_coex); 601 if (err) 602 return err; 603 604 err = aml_start_chip(hdev); 605 if (err) 606 return err; 607 608 /* Wait 60ms for controller startup */ 609 msleep(60); 610 611 err = aml_dump_fw_version(hdev); 612 if (err) 613 return err; 614 615 err = aml_send_reset(hdev); 616 if (err) 617 return err; 618 619 err = aml_check_bdaddr(hdev); 620 if (err) 621 return err; 622 623 return 0; 624 } 625 626 static int aml_enqueue(struct hci_uart *hu, struct sk_buff *skb) 627 { 628 struct aml_data *aml_data = hu->priv; 629 630 skb_queue_tail(&aml_data->txq, skb); 631 632 return 0; 633 } 634 635 static struct sk_buff *aml_dequeue(struct hci_uart *hu) 636 { 637 struct aml_data *aml_data = hu->priv; 638 struct sk_buff *skb; 639 640 skb = skb_dequeue(&aml_data->txq); 641 642 /* Prepend skb with frame type */ 643 if (skb) 644 memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); 645 646 return skb; 647 } 648 649 static int aml_recv(struct hci_uart *hu, const void *data, int count) 650 { 651 struct aml_data *aml_data = hu->priv; 652 int err; 653 654 aml_data->rx_skb = h4_recv_buf(hu->hdev, aml_data->rx_skb, data, count, 655 aml_recv_pkts, 656 ARRAY_SIZE(aml_recv_pkts)); 657 if (IS_ERR(aml_data->rx_skb)) { 658 err = PTR_ERR(aml_data->rx_skb); 659 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 660 aml_data->rx_skb = NULL; 661 return err; 662 } 663 664 return count; 665 } 666 667 static const struct hci_uart_proto aml_hci_proto = { 668 .id = HCI_UART_AML, 669 .name = "AML", 670 .init_speed = 115200, 671 .oper_speed = 4000000, 672 .open = aml_open, 673 .close = aml_close, 674 .setup = aml_setup, 675 .flush = aml_flush, 676 .recv = aml_recv, 677 .enqueue = aml_enqueue, 678 .dequeue = aml_dequeue, 679 }; 680 681 static void aml_device_driver_shutdown(struct device *dev) 682 { 683 struct aml_serdev *amldev = dev_get_drvdata(dev); 684 685 aml_power_off(amldev); 686 } 687 688 static int aml_serdev_probe(struct serdev_device *serdev) 689 { 690 struct aml_serdev *amldev; 691 int err; 692 693 amldev = devm_kzalloc(&serdev->dev, sizeof(*amldev), GFP_KERNEL); 694 if (!amldev) 695 return -ENOMEM; 696 697 amldev->serdev_hu.serdev = serdev; 698 amldev->dev = &serdev->dev; 699 serdev_device_set_drvdata(serdev, amldev); 700 701 err = hci_uart_register_device(&amldev->serdev_hu, &aml_hci_proto); 702 if (err) 703 return dev_err_probe(amldev->dev, err, 704 "Failed to register hci uart device"); 705 706 amldev->aml_dev_data = device_get_match_data(&serdev->dev); 707 708 return 0; 709 } 710 711 static void aml_serdev_remove(struct serdev_device *serdev) 712 { 713 struct aml_serdev *amldev = serdev_device_get_drvdata(serdev); 714 715 hci_uart_unregister_device(&amldev->serdev_hu); 716 } 717 718 static const struct aml_device_data data_w155s2 = { 719 .iccm_offset = 256 * 1024, 720 }; 721 722 static const struct aml_device_data data_w265s2 = { 723 .iccm_offset = 384 * 1024, 724 }; 725 726 static const struct of_device_id aml_bluetooth_of_match[] = { 727 { .compatible = "amlogic,w155s2-bt", .data = &data_w155s2 }, 728 { .compatible = "amlogic,w265s2-bt", .data = &data_w265s2 }, 729 { /* sentinel */ }, 730 }; 731 MODULE_DEVICE_TABLE(of, aml_bluetooth_of_match); 732 733 static struct serdev_device_driver aml_serdev_driver = { 734 .probe = aml_serdev_probe, 735 .remove = aml_serdev_remove, 736 .driver = { 737 .name = "hci_uart_aml", 738 .of_match_table = aml_bluetooth_of_match, 739 .shutdown = aml_device_driver_shutdown, 740 }, 741 }; 742 743 int __init aml_init(void) 744 { 745 serdev_device_driver_register(&aml_serdev_driver); 746 747 return hci_uart_register_proto(&aml_hci_proto); 748 } 749 750 int __exit aml_deinit(void) 751 { 752 serdev_device_driver_unregister(&aml_serdev_driver); 753 754 return hci_uart_unregister_proto(&aml_hci_proto); 755 } 756