1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 4 * Bluetooth HCI UART driver for Broadcom devices 5 * 6 * Copyright (C) 2015 Intel Corporation 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/errno.h> 11 #include <linux/skbuff.h> 12 #include <linux/firmware.h> 13 #include <linux/module.h> 14 #include <linux/acpi.h> 15 #include <linux/of.h> 16 #include <linux/of_irq.h> 17 #include <linux/property.h> 18 #include <linux/platform_data/x86/apple.h> 19 #include <linux/platform_device.h> 20 #include <linux/regulator/consumer.h> 21 #include <linux/clk.h> 22 #include <linux/gpio/consumer.h> 23 #include <linux/tty.h> 24 #include <linux/interrupt.h> 25 #include <linux/dmi.h> 26 #include <linux/pm_runtime.h> 27 #include <linux/serdev.h> 28 29 #include <net/bluetooth/bluetooth.h> 30 #include <net/bluetooth/hci_core.h> 31 32 #include "btbcm.h" 33 #include "hci_uart.h" 34 35 #define BCM_NULL_PKT 0x00 36 #define BCM_NULL_SIZE 0 37 38 #define BCM_LM_DIAG_PKT 0x07 39 #define BCM_LM_DIAG_SIZE 63 40 41 #define BCM_TYPE49_PKT 0x31 42 #define BCM_TYPE49_SIZE 0 43 44 #define BCM_TYPE52_PKT 0x34 45 #define BCM_TYPE52_SIZE 0 46 47 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ 48 49 #define BCM_NUM_SUPPLIES 2 50 51 /** 52 * struct bcm_device_data - device specific data 53 * @no_early_set_baudrate: Disallow set baudrate before driver setup() 54 */ 55 struct bcm_device_data { 56 bool no_early_set_baudrate; 57 bool drive_rts_on_open; 58 }; 59 60 /** 61 * struct bcm_device - device driver resources 62 * @serdev_hu: HCI UART controller struct 63 * @list: bcm_device_list node 64 * @dev: physical UART slave 65 * @name: device name logged by bt_dev_*() functions 66 * @device_wakeup: BT_WAKE pin, 67 * assert = Bluetooth device must wake up or remain awake, 68 * deassert = Bluetooth device may sleep when sleep criteria are met 69 * @shutdown: BT_REG_ON pin, 70 * power up or power down Bluetooth device internal regulators 71 * @set_device_wakeup: callback to toggle BT_WAKE pin 72 * either by accessing @device_wakeup or by calling @btlp 73 * @set_shutdown: callback to toggle BT_REG_ON pin 74 * either by accessing @shutdown or by calling @btpu/@btpd 75 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") 76 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") 77 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") 78 * @txco_clk: external reference frequency clock used by Bluetooth device 79 * @lpo_clk: external LPO clock used by Bluetooth device 80 * @supplies: VBAT and VDDIO supplies used by Bluetooth device 81 * @res_enabled: whether clocks and supplies are prepared and enabled 82 * @init_speed: default baudrate of Bluetooth device; 83 * the host UART is initially set to this baudrate so that 84 * it can configure the Bluetooth device for @oper_speed 85 * @oper_speed: preferred baudrate of Bluetooth device; 86 * set to 0 if @init_speed is already the preferred baudrate 87 * @irq: interrupt triggered by HOST_WAKE_BT pin 88 * @irq_active_low: whether @irq is active low 89 * @hu: pointer to HCI UART controller struct, 90 * used to disable flow control during runtime suspend and system sleep 91 * @is_suspended: whether flow control is currently disabled 92 * @no_early_set_baudrate: don't set_baudrate before setup() 93 */ 94 struct bcm_device { 95 /* Must be the first member, hci_serdev.c expects this. */ 96 struct hci_uart serdev_hu; 97 struct list_head list; 98 99 struct device *dev; 100 101 const char *name; 102 struct gpio_desc *device_wakeup; 103 struct gpio_desc *shutdown; 104 int (*set_device_wakeup)(struct bcm_device *, bool); 105 int (*set_shutdown)(struct bcm_device *, bool); 106 #ifdef CONFIG_ACPI 107 acpi_handle btlp, btpu, btpd; 108 int gpio_count; 109 int gpio_int_idx; 110 #endif 111 112 struct clk *txco_clk; 113 struct clk *lpo_clk; 114 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; 115 bool res_enabled; 116 117 u32 init_speed; 118 u32 oper_speed; 119 int irq; 120 bool irq_active_low; 121 122 #ifdef CONFIG_PM 123 struct hci_uart *hu; 124 bool is_suspended; 125 #endif 126 bool no_early_set_baudrate; 127 bool drive_rts_on_open; 128 u8 pcm_int_params[5]; 129 }; 130 131 /* generic bcm uart resources */ 132 struct bcm_data { 133 struct sk_buff *rx_skb; 134 struct sk_buff_head txq; 135 136 struct bcm_device *dev; 137 }; 138 139 /* List of BCM BT UART devices */ 140 static DEFINE_MUTEX(bcm_device_lock); 141 static LIST_HEAD(bcm_device_list); 142 143 static int irq_polarity = -1; 144 module_param(irq_polarity, int, 0444); 145 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); 146 147 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 148 { 149 if (hu->serdev) 150 serdev_device_set_baudrate(hu->serdev, speed); 151 else 152 hci_uart_set_baudrate(hu, speed); 153 } 154 155 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) 156 { 157 struct hci_dev *hdev = hu->hdev; 158 struct sk_buff *skb; 159 struct bcm_update_uart_baud_rate param; 160 161 if (speed > 3000000) { 162 struct bcm_write_uart_clock_setting clock; 163 164 clock.type = BCM_UART_CLOCK_48MHZ; 165 166 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); 167 168 /* This Broadcom specific command changes the UART's controller 169 * clock for baud rate > 3000000. 170 */ 171 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); 172 if (IS_ERR(skb)) { 173 int err = PTR_ERR(skb); 174 bt_dev_err(hdev, "BCM: failed to write clock (%d)", 175 err); 176 return err; 177 } 178 179 kfree_skb(skb); 180 } 181 182 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); 183 184 param.zero = cpu_to_le16(0); 185 param.baud_rate = cpu_to_le32(speed); 186 187 /* This Broadcom specific command changes the UART's controller baud 188 * rate. 189 */ 190 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, 191 HCI_INIT_TIMEOUT); 192 if (IS_ERR(skb)) { 193 int err = PTR_ERR(skb); 194 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", 195 err); 196 return err; 197 } 198 199 kfree_skb(skb); 200 201 return 0; 202 } 203 204 /* bcm_device_exists should be protected by bcm_device_lock */ 205 static bool bcm_device_exists(struct bcm_device *device) 206 { 207 struct list_head *p; 208 209 #ifdef CONFIG_PM 210 /* Devices using serdev always exist */ 211 if (device && device->hu && device->hu->serdev) 212 return true; 213 #endif 214 215 list_for_each(p, &bcm_device_list) { 216 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 217 218 if (device == dev) 219 return true; 220 } 221 222 return false; 223 } 224 225 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) 226 { 227 int err; 228 229 if (powered && !dev->res_enabled) { 230 /* Intel Macs use bcm_apple_get_resources() and don't 231 * have regulator supplies configured. 232 */ 233 if (dev->supplies[0].supply) { 234 err = regulator_bulk_enable(BCM_NUM_SUPPLIES, 235 dev->supplies); 236 if (err) 237 return err; 238 } 239 240 /* LPO clock needs to be 32.768 kHz */ 241 err = clk_set_rate(dev->lpo_clk, 32768); 242 if (err) { 243 dev_err(dev->dev, "Could not set LPO clock rate\n"); 244 goto err_regulator_disable; 245 } 246 247 err = clk_prepare_enable(dev->lpo_clk); 248 if (err) 249 goto err_regulator_disable; 250 251 err = clk_prepare_enable(dev->txco_clk); 252 if (err) 253 goto err_lpo_clk_disable; 254 } 255 256 err = dev->set_shutdown(dev, powered); 257 if (err) 258 goto err_txco_clk_disable; 259 260 err = dev->set_device_wakeup(dev, powered); 261 if (err) 262 goto err_revert_shutdown; 263 264 if (!powered && dev->res_enabled) { 265 clk_disable_unprepare(dev->txco_clk); 266 clk_disable_unprepare(dev->lpo_clk); 267 268 /* Intel Macs use bcm_apple_get_resources() and don't 269 * have regulator supplies configured. 270 */ 271 if (dev->supplies[0].supply) 272 regulator_bulk_disable(BCM_NUM_SUPPLIES, 273 dev->supplies); 274 } 275 276 /* wait for device to power on and come out of reset */ 277 usleep_range(100000, 120000); 278 279 dev->res_enabled = powered; 280 281 return 0; 282 283 err_revert_shutdown: 284 dev->set_shutdown(dev, !powered); 285 err_txco_clk_disable: 286 if (powered && !dev->res_enabled) 287 clk_disable_unprepare(dev->txco_clk); 288 err_lpo_clk_disable: 289 if (powered && !dev->res_enabled) 290 clk_disable_unprepare(dev->lpo_clk); 291 err_regulator_disable: 292 if (powered && !dev->res_enabled) 293 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); 294 return err; 295 } 296 297 #ifdef CONFIG_PM 298 static irqreturn_t bcm_host_wake(int irq, void *data) 299 { 300 struct bcm_device *bdev = data; 301 302 bt_dev_dbg(bdev, "Host wake IRQ"); 303 304 pm_runtime_get(bdev->dev); 305 pm_runtime_mark_last_busy(bdev->dev); 306 pm_runtime_put_autosuspend(bdev->dev); 307 308 return IRQ_HANDLED; 309 } 310 311 static int bcm_request_irq(struct bcm_data *bcm) 312 { 313 struct bcm_device *bdev = bcm->dev; 314 int err; 315 316 mutex_lock(&bcm_device_lock); 317 if (!bcm_device_exists(bdev)) { 318 err = -ENODEV; 319 goto unlock; 320 } 321 322 if (bdev->irq <= 0) { 323 err = -EOPNOTSUPP; 324 goto unlock; 325 } 326 327 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, 328 bdev->irq_active_low ? IRQF_TRIGGER_FALLING : 329 IRQF_TRIGGER_RISING, 330 "host_wake", bdev); 331 if (err) { 332 bdev->irq = err; 333 goto unlock; 334 } 335 336 device_init_wakeup(bdev->dev, true); 337 338 pm_runtime_set_autosuspend_delay(bdev->dev, 339 BCM_AUTOSUSPEND_DELAY); 340 pm_runtime_use_autosuspend(bdev->dev); 341 pm_runtime_set_active(bdev->dev); 342 pm_runtime_enable(bdev->dev); 343 344 unlock: 345 mutex_unlock(&bcm_device_lock); 346 347 return err; 348 } 349 350 static const struct bcm_set_sleep_mode default_sleep_params = { 351 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ 352 .idle_host = 2, /* idle threshold HOST, in 300ms */ 353 .idle_dev = 2, /* idle threshold device, in 300ms */ 354 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ 355 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ 356 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ 357 .combine_modes = 1, /* Combine sleep and LPM flag */ 358 .tristate_control = 0, /* Allow tri-state control of UART tx flag */ 359 /* Irrelevant USB flags */ 360 .usb_auto_sleep = 0, 361 .usb_resume_timeout = 0, 362 .break_to_host = 0, 363 .pulsed_host_wake = 1, 364 }; 365 366 static int bcm_setup_sleep(struct hci_uart *hu) 367 { 368 struct bcm_data *bcm = hu->priv; 369 struct sk_buff *skb; 370 struct bcm_set_sleep_mode sleep_params = default_sleep_params; 371 372 sleep_params.host_wake_active = !bcm->dev->irq_active_low; 373 374 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), 375 &sleep_params, HCI_INIT_TIMEOUT); 376 if (IS_ERR(skb)) { 377 int err = PTR_ERR(skb); 378 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); 379 return err; 380 } 381 kfree_skb(skb); 382 383 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); 384 385 return 0; 386 } 387 #else 388 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } 389 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } 390 #endif 391 392 static int bcm_set_diag(struct hci_dev *hdev, bool enable) 393 { 394 struct hci_uart *hu = hci_get_drvdata(hdev); 395 struct bcm_data *bcm = hu->priv; 396 struct sk_buff *skb; 397 398 if (!test_bit(HCI_RUNNING, &hdev->flags)) 399 return -ENETDOWN; 400 401 skb = bt_skb_alloc(3, GFP_KERNEL); 402 if (!skb) 403 return -ENOMEM; 404 405 skb_put_u8(skb, BCM_LM_DIAG_PKT); 406 skb_put_u8(skb, 0xf0); 407 skb_put_u8(skb, enable); 408 409 skb_queue_tail(&bcm->txq, skb); 410 hci_uart_tx_wakeup(hu); 411 412 return 0; 413 } 414 415 static int bcm_open(struct hci_uart *hu) 416 { 417 struct bcm_data *bcm; 418 struct list_head *p; 419 int err; 420 421 bt_dev_dbg(hu->hdev, "hu %p", hu); 422 423 if (!hci_uart_has_flow_control(hu)) 424 return -EOPNOTSUPP; 425 426 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); 427 if (!bcm) 428 return -ENOMEM; 429 430 skb_queue_head_init(&bcm->txq); 431 432 hu->priv = bcm; 433 434 mutex_lock(&bcm_device_lock); 435 436 if (hu->serdev) { 437 bcm->dev = serdev_device_get_drvdata(hu->serdev); 438 goto out; 439 } 440 441 if (!hu->tty->dev) 442 goto out; 443 444 list_for_each(p, &bcm_device_list) { 445 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 446 447 /* Retrieve saved bcm_device based on parent of the 448 * platform device (saved during device probe) and 449 * parent of tty device used by hci_uart 450 */ 451 if (hu->tty->dev->parent == dev->dev->parent) { 452 bcm->dev = dev; 453 #ifdef CONFIG_PM 454 dev->hu = hu; 455 #endif 456 break; 457 } 458 } 459 460 out: 461 if (bcm->dev) { 462 if (bcm->dev->drive_rts_on_open) 463 hci_uart_set_flow_control(hu, true); 464 465 hu->init_speed = bcm->dev->init_speed; 466 467 /* If oper_speed is set, ldisc/serdev will set the baudrate 468 * before calling setup() 469 */ 470 if (!bcm->dev->no_early_set_baudrate) 471 hu->oper_speed = bcm->dev->oper_speed; 472 473 err = bcm_gpio_set_power(bcm->dev, true); 474 475 if (bcm->dev->drive_rts_on_open) 476 hci_uart_set_flow_control(hu, false); 477 478 if (err) 479 goto err_unset_hu; 480 } 481 482 mutex_unlock(&bcm_device_lock); 483 return 0; 484 485 err_unset_hu: 486 #ifdef CONFIG_PM 487 if (!hu->serdev) 488 bcm->dev->hu = NULL; 489 #endif 490 mutex_unlock(&bcm_device_lock); 491 hu->priv = NULL; 492 kfree(bcm); 493 return err; 494 } 495 496 static int bcm_close(struct hci_uart *hu) 497 { 498 struct bcm_data *bcm = hu->priv; 499 struct bcm_device *bdev = NULL; 500 int err; 501 502 bt_dev_dbg(hu->hdev, "hu %p", hu); 503 504 /* Protect bcm->dev against removal of the device or driver */ 505 mutex_lock(&bcm_device_lock); 506 507 if (hu->serdev) { 508 bdev = serdev_device_get_drvdata(hu->serdev); 509 } else if (bcm_device_exists(bcm->dev)) { 510 bdev = bcm->dev; 511 #ifdef CONFIG_PM 512 bdev->hu = NULL; 513 #endif 514 } 515 516 if (bdev) { 517 if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) { 518 devm_free_irq(bdev->dev, bdev->irq, bdev); 519 device_init_wakeup(bdev->dev, false); 520 pm_runtime_disable(bdev->dev); 521 } 522 523 err = bcm_gpio_set_power(bdev, false); 524 if (err) 525 bt_dev_err(hu->hdev, "Failed to power down"); 526 else 527 pm_runtime_set_suspended(bdev->dev); 528 } 529 mutex_unlock(&bcm_device_lock); 530 531 skb_queue_purge(&bcm->txq); 532 kfree_skb(bcm->rx_skb); 533 kfree(bcm); 534 535 hu->priv = NULL; 536 return 0; 537 } 538 539 static int bcm_flush(struct hci_uart *hu) 540 { 541 struct bcm_data *bcm = hu->priv; 542 543 bt_dev_dbg(hu->hdev, "hu %p", hu); 544 545 skb_queue_purge(&bcm->txq); 546 547 return 0; 548 } 549 550 static int bcm_setup(struct hci_uart *hu) 551 { 552 struct bcm_data *bcm = hu->priv; 553 char fw_name[64]; 554 const struct firmware *fw; 555 unsigned int speed; 556 int err; 557 558 bt_dev_dbg(hu->hdev, "hu %p", hu); 559 560 hu->hdev->set_diag = bcm_set_diag; 561 hu->hdev->set_bdaddr = btbcm_set_bdaddr; 562 563 err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false); 564 if (err) 565 return err; 566 567 err = request_firmware(&fw, fw_name, &hu->hdev->dev); 568 if (err < 0) { 569 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); 570 return 0; 571 } 572 573 err = btbcm_patchram(hu->hdev, fw); 574 if (err) { 575 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); 576 goto finalize; 577 } 578 579 /* Init speed if any */ 580 if (hu->init_speed) 581 speed = hu->init_speed; 582 else if (hu->proto->init_speed) 583 speed = hu->proto->init_speed; 584 else 585 speed = 0; 586 587 if (speed) 588 host_set_baudrate(hu, speed); 589 590 /* Operational speed if any */ 591 if (hu->oper_speed) 592 speed = hu->oper_speed; 593 else if (bcm->dev && bcm->dev->oper_speed) 594 speed = bcm->dev->oper_speed; 595 else if (hu->proto->oper_speed) 596 speed = hu->proto->oper_speed; 597 else 598 speed = 0; 599 600 if (speed) { 601 err = bcm_set_baudrate(hu, speed); 602 if (!err) 603 host_set_baudrate(hu, speed); 604 } 605 606 /* PCM parameters if provided */ 607 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) { 608 struct bcm_set_pcm_int_params params; 609 610 btbcm_read_pcm_int_params(hu->hdev, ¶ms); 611 612 memcpy(¶ms, bcm->dev->pcm_int_params, 5); 613 btbcm_write_pcm_int_params(hu->hdev, ¶ms); 614 } 615 616 finalize: 617 release_firmware(fw); 618 619 err = btbcm_finalize(hu->hdev); 620 if (err) 621 return err; 622 623 if (!bcm_request_irq(bcm)) 624 err = bcm_setup_sleep(hu); 625 626 return err; 627 } 628 629 #define BCM_RECV_LM_DIAG \ 630 .type = BCM_LM_DIAG_PKT, \ 631 .hlen = BCM_LM_DIAG_SIZE, \ 632 .loff = 0, \ 633 .lsize = 0, \ 634 .maxlen = BCM_LM_DIAG_SIZE 635 636 #define BCM_RECV_NULL \ 637 .type = BCM_NULL_PKT, \ 638 .hlen = BCM_NULL_SIZE, \ 639 .loff = 0, \ 640 .lsize = 0, \ 641 .maxlen = BCM_NULL_SIZE 642 643 #define BCM_RECV_TYPE49 \ 644 .type = BCM_TYPE49_PKT, \ 645 .hlen = BCM_TYPE49_SIZE, \ 646 .loff = 0, \ 647 .lsize = 0, \ 648 .maxlen = BCM_TYPE49_SIZE 649 650 #define BCM_RECV_TYPE52 \ 651 .type = BCM_TYPE52_PKT, \ 652 .hlen = BCM_TYPE52_SIZE, \ 653 .loff = 0, \ 654 .lsize = 0, \ 655 .maxlen = BCM_TYPE52_SIZE 656 657 static const struct h4_recv_pkt bcm_recv_pkts[] = { 658 { H4_RECV_ACL, .recv = hci_recv_frame }, 659 { H4_RECV_SCO, .recv = hci_recv_frame }, 660 { H4_RECV_EVENT, .recv = hci_recv_frame }, 661 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, 662 { BCM_RECV_NULL, .recv = hci_recv_diag }, 663 { BCM_RECV_TYPE49, .recv = hci_recv_diag }, 664 { BCM_RECV_TYPE52, .recv = hci_recv_diag }, 665 }; 666 667 static int bcm_recv(struct hci_uart *hu, const void *data, int count) 668 { 669 struct bcm_data *bcm = hu->priv; 670 671 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 672 return -EUNATCH; 673 674 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, 675 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); 676 if (IS_ERR(bcm->rx_skb)) { 677 int err = PTR_ERR(bcm->rx_skb); 678 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 679 bcm->rx_skb = NULL; 680 return err; 681 } else if (!bcm->rx_skb) { 682 /* Delay auto-suspend when receiving completed packet */ 683 mutex_lock(&bcm_device_lock); 684 if (bcm->dev && bcm_device_exists(bcm->dev)) { 685 pm_runtime_get(bcm->dev->dev); 686 pm_runtime_mark_last_busy(bcm->dev->dev); 687 pm_runtime_put_autosuspend(bcm->dev->dev); 688 } 689 mutex_unlock(&bcm_device_lock); 690 } 691 692 return count; 693 } 694 695 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) 696 { 697 struct bcm_data *bcm = hu->priv; 698 699 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); 700 701 /* Prepend skb with frame type */ 702 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 703 skb_queue_tail(&bcm->txq, skb); 704 705 return 0; 706 } 707 708 static struct sk_buff *bcm_dequeue(struct hci_uart *hu) 709 { 710 struct bcm_data *bcm = hu->priv; 711 struct sk_buff *skb = NULL; 712 struct bcm_device *bdev = NULL; 713 714 mutex_lock(&bcm_device_lock); 715 716 if (bcm_device_exists(bcm->dev)) { 717 bdev = bcm->dev; 718 pm_runtime_get_sync(bdev->dev); 719 /* Shall be resumed here */ 720 } 721 722 skb = skb_dequeue(&bcm->txq); 723 724 if (bdev) { 725 pm_runtime_mark_last_busy(bdev->dev); 726 pm_runtime_put_autosuspend(bdev->dev); 727 } 728 729 mutex_unlock(&bcm_device_lock); 730 731 return skb; 732 } 733 734 #ifdef CONFIG_PM 735 static int bcm_suspend_device(struct device *dev) 736 { 737 struct bcm_device *bdev = dev_get_drvdata(dev); 738 int err; 739 740 bt_dev_dbg(bdev, ""); 741 742 if (!bdev->is_suspended && bdev->hu) { 743 hci_uart_set_flow_control(bdev->hu, true); 744 745 /* Once this returns, driver suspends BT via GPIO */ 746 bdev->is_suspended = true; 747 } 748 749 /* Suspend the device */ 750 err = bdev->set_device_wakeup(bdev, false); 751 if (err) { 752 if (bdev->is_suspended && bdev->hu) { 753 bdev->is_suspended = false; 754 hci_uart_set_flow_control(bdev->hu, false); 755 } 756 return -EBUSY; 757 } 758 759 bt_dev_dbg(bdev, "suspend, delaying 15 ms"); 760 msleep(15); 761 762 return 0; 763 } 764 765 static int bcm_resume_device(struct device *dev) 766 { 767 struct bcm_device *bdev = dev_get_drvdata(dev); 768 int err; 769 770 bt_dev_dbg(bdev, ""); 771 772 err = bdev->set_device_wakeup(bdev, true); 773 if (err) { 774 dev_err(dev, "Failed to power up\n"); 775 return err; 776 } 777 778 bt_dev_dbg(bdev, "resume, delaying 15 ms"); 779 msleep(15); 780 781 /* When this executes, the device has woken up already */ 782 if (bdev->is_suspended && bdev->hu) { 783 bdev->is_suspended = false; 784 785 hci_uart_set_flow_control(bdev->hu, false); 786 } 787 788 return 0; 789 } 790 #endif 791 792 #ifdef CONFIG_PM_SLEEP 793 /* suspend callback */ 794 static int bcm_suspend(struct device *dev) 795 { 796 struct bcm_device *bdev = dev_get_drvdata(dev); 797 int error; 798 799 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); 800 801 /* 802 * When used with a device instantiated as platform_device, bcm_suspend 803 * can be called at any time as long as the platform device is bound, 804 * so it should use bcm_device_lock to protect access to hci_uart 805 * and device_wake-up GPIO. 806 */ 807 mutex_lock(&bcm_device_lock); 808 809 if (!bdev->hu) 810 goto unlock; 811 812 if (pm_runtime_active(dev)) 813 bcm_suspend_device(dev); 814 815 if (device_may_wakeup(dev) && bdev->irq > 0) { 816 error = enable_irq_wake(bdev->irq); 817 if (!error) 818 bt_dev_dbg(bdev, "BCM irq: enabled"); 819 } 820 821 unlock: 822 mutex_unlock(&bcm_device_lock); 823 824 return 0; 825 } 826 827 /* resume callback */ 828 static int bcm_resume(struct device *dev) 829 { 830 struct bcm_device *bdev = dev_get_drvdata(dev); 831 int err = 0; 832 833 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); 834 835 /* 836 * When used with a device instantiated as platform_device, bcm_resume 837 * can be called at any time as long as platform device is bound, 838 * so it should use bcm_device_lock to protect access to hci_uart 839 * and device_wake-up GPIO. 840 */ 841 mutex_lock(&bcm_device_lock); 842 843 if (!bdev->hu) 844 goto unlock; 845 846 if (device_may_wakeup(dev) && bdev->irq > 0) { 847 disable_irq_wake(bdev->irq); 848 bt_dev_dbg(bdev, "BCM irq: disabled"); 849 } 850 851 err = bcm_resume_device(dev); 852 853 unlock: 854 mutex_unlock(&bcm_device_lock); 855 856 if (!err) { 857 pm_runtime_disable(dev); 858 pm_runtime_set_active(dev); 859 pm_runtime_enable(dev); 860 } 861 862 return 0; 863 } 864 #endif 865 866 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ 867 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { 868 { 869 .ident = "Meegopad T08", 870 .matches = { 871 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, 872 "To be filled by OEM."), 873 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), 874 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), 875 }, 876 }, 877 { } 878 }; 879 880 #ifdef CONFIG_ACPI 881 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 882 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 883 static const struct acpi_gpio_params third_gpio = { 2, 0, false }; 884 885 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { 886 { "device-wakeup-gpios", &first_gpio, 1 }, 887 { "shutdown-gpios", &second_gpio, 1 }, 888 { "host-wakeup-gpios", &third_gpio, 1 }, 889 { }, 890 }; 891 892 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { 893 { "host-wakeup-gpios", &first_gpio, 1 }, 894 { "device-wakeup-gpios", &second_gpio, 1 }, 895 { "shutdown-gpios", &third_gpio, 1 }, 896 { }, 897 }; 898 899 static int bcm_resource(struct acpi_resource *ares, void *data) 900 { 901 struct bcm_device *dev = data; 902 struct acpi_resource_extended_irq *irq; 903 struct acpi_resource_gpio *gpio; 904 struct acpi_resource_uart_serialbus *sb; 905 906 switch (ares->type) { 907 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 908 irq = &ares->data.extended_irq; 909 if (irq->polarity != ACPI_ACTIVE_LOW) 910 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); 911 dev->irq_active_low = true; 912 break; 913 914 case ACPI_RESOURCE_TYPE_GPIO: 915 gpio = &ares->data.gpio; 916 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 917 dev->gpio_int_idx = dev->gpio_count; 918 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; 919 } 920 dev->gpio_count++; 921 break; 922 923 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 924 sb = &ares->data.uart_serial_bus; 925 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { 926 dev->init_speed = sb->default_baud_rate; 927 dev->oper_speed = 4000000; 928 } 929 break; 930 931 default: 932 break; 933 } 934 935 return 0; 936 } 937 938 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) 939 { 940 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) 941 return -EIO; 942 943 return 0; 944 } 945 946 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) 947 { 948 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, 949 NULL, NULL, NULL))) 950 return -EIO; 951 952 return 0; 953 } 954 955 static int bcm_apple_get_resources(struct bcm_device *dev) 956 { 957 struct acpi_device *adev = ACPI_COMPANION(dev->dev); 958 const union acpi_object *obj; 959 960 if (!adev || 961 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || 962 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || 963 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) 964 return -ENODEV; 965 966 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && 967 obj->buffer.length == 8) 968 dev->init_speed = *(u64 *)obj->buffer.pointer; 969 970 dev->set_device_wakeup = bcm_apple_set_device_wakeup; 971 dev->set_shutdown = bcm_apple_set_shutdown; 972 973 return 0; 974 } 975 #else 976 static inline int bcm_apple_get_resources(struct bcm_device *dev) 977 { 978 return -EOPNOTSUPP; 979 } 980 #endif /* CONFIG_ACPI */ 981 982 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) 983 { 984 gpiod_set_value_cansleep(dev->device_wakeup, awake); 985 return 0; 986 } 987 988 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) 989 { 990 gpiod_set_value_cansleep(dev->shutdown, powered); 991 return 0; 992 } 993 994 /* Try a bunch of names for TXCO */ 995 static struct clk *bcm_get_txco(struct device *dev) 996 { 997 struct clk *clk; 998 999 /* New explicit name */ 1000 clk = devm_clk_get(dev, "txco"); 1001 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1002 return clk; 1003 1004 /* Deprecated name */ 1005 clk = devm_clk_get(dev, "extclk"); 1006 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1007 return clk; 1008 1009 /* Original code used no name at all */ 1010 return devm_clk_get(dev, NULL); 1011 } 1012 1013 static int bcm_get_resources(struct bcm_device *dev) 1014 { 1015 const struct dmi_system_id *dmi_id; 1016 int err; 1017 1018 dev->name = dev_name(dev->dev); 1019 1020 if (x86_apple_machine && !bcm_apple_get_resources(dev)) 1021 return 0; 1022 1023 dev->txco_clk = bcm_get_txco(dev->dev); 1024 1025 /* Handle deferred probing */ 1026 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) 1027 return PTR_ERR(dev->txco_clk); 1028 1029 /* Ignore all other errors as before */ 1030 if (IS_ERR(dev->txco_clk)) 1031 dev->txco_clk = NULL; 1032 1033 dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); 1034 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) 1035 return PTR_ERR(dev->lpo_clk); 1036 1037 if (IS_ERR(dev->lpo_clk)) 1038 dev->lpo_clk = NULL; 1039 1040 /* Check if we accidentally fetched the lpo clock twice */ 1041 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { 1042 devm_clk_put(dev->dev, dev->txco_clk); 1043 dev->txco_clk = NULL; 1044 } 1045 1046 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", 1047 GPIOD_OUT_LOW); 1048 if (IS_ERR(dev->device_wakeup)) 1049 return PTR_ERR(dev->device_wakeup); 1050 1051 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", 1052 GPIOD_OUT_LOW); 1053 if (IS_ERR(dev->shutdown)) 1054 return PTR_ERR(dev->shutdown); 1055 1056 dev->set_device_wakeup = bcm_gpio_set_device_wakeup; 1057 dev->set_shutdown = bcm_gpio_set_shutdown; 1058 1059 dev->supplies[0].supply = "vbat"; 1060 dev->supplies[1].supply = "vddio"; 1061 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, 1062 dev->supplies); 1063 if (err) 1064 return err; 1065 1066 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ 1067 if (dev->irq <= 0) { 1068 struct gpio_desc *gpio; 1069 1070 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", 1071 GPIOD_IN); 1072 if (IS_ERR(gpio)) 1073 return PTR_ERR(gpio); 1074 1075 dev->irq = gpiod_to_irq(gpio); 1076 } 1077 1078 dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); 1079 if (dmi_id) { 1080 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", 1081 dmi_id->ident); 1082 dev->irq = 0; 1083 } 1084 1085 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); 1086 return 0; 1087 } 1088 1089 #ifdef CONFIG_ACPI 1090 static int bcm_acpi_probe(struct bcm_device *dev) 1091 { 1092 LIST_HEAD(resources); 1093 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; 1094 struct resource_entry *entry; 1095 int ret; 1096 1097 /* Retrieve UART ACPI info */ 1098 dev->gpio_int_idx = -1; 1099 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), 1100 &resources, bcm_resource, dev); 1101 if (ret < 0) 1102 return ret; 1103 1104 resource_list_for_each_entry(entry, &resources) { 1105 if (resource_type(entry->res) == IORESOURCE_IRQ) { 1106 dev->irq = entry->res->start; 1107 break; 1108 } 1109 } 1110 acpi_dev_free_resource_list(&resources); 1111 1112 /* If the DSDT uses an Interrupt resource for the IRQ, then there are 1113 * only 2 GPIO resources, we use the irq-last mapping for this, since 1114 * we already have an irq the 3th / last mapping will not be used. 1115 */ 1116 if (dev->irq) 1117 gpio_mapping = acpi_bcm_int_last_gpios; 1118 else if (dev->gpio_int_idx == 0) 1119 gpio_mapping = acpi_bcm_int_first_gpios; 1120 else if (dev->gpio_int_idx == 2) 1121 gpio_mapping = acpi_bcm_int_last_gpios; 1122 else 1123 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", 1124 dev->gpio_int_idx); 1125 1126 /* Warn if our expectations are not met. */ 1127 if (dev->gpio_count != (dev->irq ? 2 : 3)) 1128 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", 1129 dev->gpio_count); 1130 1131 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); 1132 if (ret) 1133 return ret; 1134 1135 if (irq_polarity != -1) { 1136 dev->irq_active_low = irq_polarity; 1137 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", 1138 dev->irq_active_low ? "low" : "high"); 1139 } 1140 1141 return 0; 1142 } 1143 #else 1144 static int bcm_acpi_probe(struct bcm_device *dev) 1145 { 1146 return -EINVAL; 1147 } 1148 #endif /* CONFIG_ACPI */ 1149 1150 static int bcm_of_probe(struct bcm_device *bdev) 1151 { 1152 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); 1153 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params", 1154 bdev->pcm_int_params, 5); 1155 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup"); 1156 1157 return 0; 1158 } 1159 1160 static int bcm_probe(struct platform_device *pdev) 1161 { 1162 struct bcm_device *dev; 1163 int ret; 1164 1165 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 1166 if (!dev) 1167 return -ENOMEM; 1168 1169 dev->dev = &pdev->dev; 1170 dev->irq = platform_get_irq(pdev, 0); 1171 1172 /* Initialize routing field to an unused value */ 1173 dev->pcm_int_params[0] = 0xff; 1174 1175 if (has_acpi_companion(&pdev->dev)) { 1176 ret = bcm_acpi_probe(dev); 1177 if (ret) 1178 return ret; 1179 } 1180 1181 ret = bcm_get_resources(dev); 1182 if (ret) 1183 return ret; 1184 1185 platform_set_drvdata(pdev, dev); 1186 1187 dev_info(&pdev->dev, "%s device registered.\n", dev->name); 1188 1189 /* Place this instance on the device list */ 1190 mutex_lock(&bcm_device_lock); 1191 list_add_tail(&dev->list, &bcm_device_list); 1192 mutex_unlock(&bcm_device_lock); 1193 1194 ret = bcm_gpio_set_power(dev, false); 1195 if (ret) 1196 dev_err(&pdev->dev, "Failed to power down\n"); 1197 1198 return 0; 1199 } 1200 1201 static int bcm_remove(struct platform_device *pdev) 1202 { 1203 struct bcm_device *dev = platform_get_drvdata(pdev); 1204 1205 mutex_lock(&bcm_device_lock); 1206 list_del(&dev->list); 1207 mutex_unlock(&bcm_device_lock); 1208 1209 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); 1210 1211 return 0; 1212 } 1213 1214 static const struct hci_uart_proto bcm_proto = { 1215 .id = HCI_UART_BCM, 1216 .name = "Broadcom", 1217 .manufacturer = 15, 1218 .init_speed = 115200, 1219 .open = bcm_open, 1220 .close = bcm_close, 1221 .flush = bcm_flush, 1222 .setup = bcm_setup, 1223 .set_baudrate = bcm_set_baudrate, 1224 .recv = bcm_recv, 1225 .enqueue = bcm_enqueue, 1226 .dequeue = bcm_dequeue, 1227 }; 1228 1229 #ifdef CONFIG_ACPI 1230 static const struct acpi_device_id bcm_acpi_match[] = { 1231 { "BCM2E00" }, 1232 { "BCM2E01" }, 1233 { "BCM2E02" }, 1234 { "BCM2E03" }, 1235 { "BCM2E04" }, 1236 { "BCM2E05" }, 1237 { "BCM2E06" }, 1238 { "BCM2E07" }, 1239 { "BCM2E08" }, 1240 { "BCM2E09" }, 1241 { "BCM2E0A" }, 1242 { "BCM2E0B" }, 1243 { "BCM2E0C" }, 1244 { "BCM2E0D" }, 1245 { "BCM2E0E" }, 1246 { "BCM2E0F" }, 1247 { "BCM2E10" }, 1248 { "BCM2E11" }, 1249 { "BCM2E12" }, 1250 { "BCM2E13" }, 1251 { "BCM2E14" }, 1252 { "BCM2E15" }, 1253 { "BCM2E16" }, 1254 { "BCM2E17" }, 1255 { "BCM2E18" }, 1256 { "BCM2E19" }, 1257 { "BCM2E1A" }, 1258 { "BCM2E1B" }, 1259 { "BCM2E1C" }, 1260 { "BCM2E1D" }, 1261 { "BCM2E1F" }, 1262 { "BCM2E20" }, 1263 { "BCM2E21" }, 1264 { "BCM2E22" }, 1265 { "BCM2E23" }, 1266 { "BCM2E24" }, 1267 { "BCM2E25" }, 1268 { "BCM2E26" }, 1269 { "BCM2E27" }, 1270 { "BCM2E28" }, 1271 { "BCM2E29" }, 1272 { "BCM2E2A" }, 1273 { "BCM2E2B" }, 1274 { "BCM2E2C" }, 1275 { "BCM2E2D" }, 1276 { "BCM2E2E" }, 1277 { "BCM2E2F" }, 1278 { "BCM2E30" }, 1279 { "BCM2E31" }, 1280 { "BCM2E32" }, 1281 { "BCM2E33" }, 1282 { "BCM2E34" }, 1283 { "BCM2E35" }, 1284 { "BCM2E36" }, 1285 { "BCM2E37" }, 1286 { "BCM2E38" }, 1287 { "BCM2E39" }, 1288 { "BCM2E3A" }, 1289 { "BCM2E3B" }, 1290 { "BCM2E3C" }, 1291 { "BCM2E3D" }, 1292 { "BCM2E3E" }, 1293 { "BCM2E3F" }, 1294 { "BCM2E40" }, 1295 { "BCM2E41" }, 1296 { "BCM2E42" }, 1297 { "BCM2E43" }, 1298 { "BCM2E44" }, 1299 { "BCM2E45" }, 1300 { "BCM2E46" }, 1301 { "BCM2E47" }, 1302 { "BCM2E48" }, 1303 { "BCM2E49" }, 1304 { "BCM2E4A" }, 1305 { "BCM2E4B" }, 1306 { "BCM2E4C" }, 1307 { "BCM2E4D" }, 1308 { "BCM2E4E" }, 1309 { "BCM2E4F" }, 1310 { "BCM2E50" }, 1311 { "BCM2E51" }, 1312 { "BCM2E52" }, 1313 { "BCM2E53" }, 1314 { "BCM2E54" }, 1315 { "BCM2E55" }, 1316 { "BCM2E56" }, 1317 { "BCM2E57" }, 1318 { "BCM2E58" }, 1319 { "BCM2E59" }, 1320 { "BCM2E5A" }, 1321 { "BCM2E5B" }, 1322 { "BCM2E5C" }, 1323 { "BCM2E5D" }, 1324 { "BCM2E5E" }, 1325 { "BCM2E5F" }, 1326 { "BCM2E60" }, 1327 { "BCM2E61" }, 1328 { "BCM2E62" }, 1329 { "BCM2E63" }, 1330 { "BCM2E64" }, 1331 { "BCM2E65" }, 1332 { "BCM2E66" }, 1333 { "BCM2E67" }, 1334 { "BCM2E68" }, 1335 { "BCM2E69" }, 1336 { "BCM2E6B" }, 1337 { "BCM2E6D" }, 1338 { "BCM2E6E" }, 1339 { "BCM2E6F" }, 1340 { "BCM2E70" }, 1341 { "BCM2E71" }, 1342 { "BCM2E72" }, 1343 { "BCM2E73" }, 1344 { "BCM2E74" }, 1345 { "BCM2E75" }, 1346 { "BCM2E76" }, 1347 { "BCM2E77" }, 1348 { "BCM2E78" }, 1349 { "BCM2E79" }, 1350 { "BCM2E7A" }, 1351 { "BCM2E7B" }, 1352 { "BCM2E7C" }, 1353 { "BCM2E7D" }, 1354 { "BCM2E7E" }, 1355 { "BCM2E7F" }, 1356 { "BCM2E80" }, 1357 { "BCM2E81" }, 1358 { "BCM2E82" }, 1359 { "BCM2E83" }, 1360 { "BCM2E84" }, 1361 { "BCM2E85" }, 1362 { "BCM2E86" }, 1363 { "BCM2E87" }, 1364 { "BCM2E88" }, 1365 { "BCM2E89" }, 1366 { "BCM2E8A" }, 1367 { "BCM2E8B" }, 1368 { "BCM2E8C" }, 1369 { "BCM2E8D" }, 1370 { "BCM2E8E" }, 1371 { "BCM2E90" }, 1372 { "BCM2E92" }, 1373 { "BCM2E93" }, 1374 { "BCM2E94" }, 1375 { "BCM2E95" }, 1376 { "BCM2E96" }, 1377 { "BCM2E97" }, 1378 { "BCM2E98" }, 1379 { "BCM2E99" }, 1380 { "BCM2E9A" }, 1381 { "BCM2E9B" }, 1382 { "BCM2E9C" }, 1383 { "BCM2E9D" }, 1384 { "BCM2EA0" }, 1385 { "BCM2EA1" }, 1386 { "BCM2EA2" }, 1387 { "BCM2EA3" }, 1388 { "BCM2EA4" }, 1389 { "BCM2EA5" }, 1390 { "BCM2EA6" }, 1391 { "BCM2EA7" }, 1392 { "BCM2EA8" }, 1393 { "BCM2EA9" }, 1394 { "BCM2EAA" }, 1395 { "BCM2EAB" }, 1396 { "BCM2EAC" }, 1397 { }, 1398 }; 1399 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); 1400 #endif 1401 1402 /* suspend and resume callbacks */ 1403 static const struct dev_pm_ops bcm_pm_ops = { 1404 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) 1405 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) 1406 }; 1407 1408 static struct platform_driver bcm_driver = { 1409 .probe = bcm_probe, 1410 .remove = bcm_remove, 1411 .driver = { 1412 .name = "hci_bcm", 1413 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1414 .pm = &bcm_pm_ops, 1415 }, 1416 }; 1417 1418 static int bcm_serdev_probe(struct serdev_device *serdev) 1419 { 1420 struct bcm_device *bcmdev; 1421 const struct bcm_device_data *data; 1422 int err; 1423 1424 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); 1425 if (!bcmdev) 1426 return -ENOMEM; 1427 1428 bcmdev->dev = &serdev->dev; 1429 #ifdef CONFIG_PM 1430 bcmdev->hu = &bcmdev->serdev_hu; 1431 #endif 1432 bcmdev->serdev_hu.serdev = serdev; 1433 serdev_device_set_drvdata(serdev, bcmdev); 1434 1435 /* Initialize routing field to an unused value */ 1436 bcmdev->pcm_int_params[0] = 0xff; 1437 1438 if (has_acpi_companion(&serdev->dev)) 1439 err = bcm_acpi_probe(bcmdev); 1440 else 1441 err = bcm_of_probe(bcmdev); 1442 if (err) 1443 return err; 1444 1445 err = bcm_get_resources(bcmdev); 1446 if (err) 1447 return err; 1448 1449 if (!bcmdev->shutdown) { 1450 dev_warn(&serdev->dev, 1451 "No reset resource, using default baud rate\n"); 1452 bcmdev->oper_speed = bcmdev->init_speed; 1453 } 1454 1455 err = bcm_gpio_set_power(bcmdev, false); 1456 if (err) 1457 dev_err(&serdev->dev, "Failed to power down\n"); 1458 1459 data = device_get_match_data(bcmdev->dev); 1460 if (data) { 1461 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; 1462 bcmdev->drive_rts_on_open = data->drive_rts_on_open; 1463 } 1464 1465 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); 1466 } 1467 1468 static void bcm_serdev_remove(struct serdev_device *serdev) 1469 { 1470 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); 1471 1472 hci_uart_unregister_device(&bcmdev->serdev_hu); 1473 } 1474 1475 #ifdef CONFIG_OF 1476 static struct bcm_device_data bcm4354_device_data = { 1477 .no_early_set_baudrate = true, 1478 }; 1479 1480 static struct bcm_device_data bcm43438_device_data = { 1481 .drive_rts_on_open = true, 1482 }; 1483 1484 static const struct of_device_id bcm_bluetooth_of_match[] = { 1485 { .compatible = "brcm,bcm20702a1" }, 1486 { .compatible = "brcm,bcm4329-bt" }, 1487 { .compatible = "brcm,bcm4345c5" }, 1488 { .compatible = "brcm,bcm4330-bt" }, 1489 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, 1490 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, 1491 { .compatible = "brcm,bcm4335a0" }, 1492 { }, 1493 }; 1494 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); 1495 #endif 1496 1497 static struct serdev_device_driver bcm_serdev_driver = { 1498 .probe = bcm_serdev_probe, 1499 .remove = bcm_serdev_remove, 1500 .driver = { 1501 .name = "hci_uart_bcm", 1502 .of_match_table = of_match_ptr(bcm_bluetooth_of_match), 1503 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1504 .pm = &bcm_pm_ops, 1505 }, 1506 }; 1507 1508 int __init bcm_init(void) 1509 { 1510 /* For now, we need to keep both platform device 1511 * driver (ACPI generated) and serdev driver (DT). 1512 */ 1513 platform_driver_register(&bcm_driver); 1514 serdev_device_driver_register(&bcm_serdev_driver); 1515 1516 return hci_uart_register_proto(&bcm_proto); 1517 } 1518 1519 int __exit bcm_deinit(void) 1520 { 1521 platform_driver_unregister(&bcm_driver); 1522 serdev_device_driver_unregister(&bcm_serdev_driver); 1523 1524 return hci_uart_unregister_proto(&bcm_proto); 1525 } 1526