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 */ 55struct 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 */ 94struct 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 bool irq_acquired; 122 123#ifdef CONFIG_PM 124 struct hci_uart *hu; 125 bool is_suspended; 126#endif 127 bool no_early_set_baudrate; 128 bool drive_rts_on_open; 129 u8 pcm_int_params[5]; 130}; 131 132/* generic bcm uart resources */ 133struct bcm_data { 134 struct sk_buff *rx_skb; 135 struct sk_buff_head txq; 136 137 struct bcm_device *dev; 138}; 139 140/* List of BCM BT UART devices */ 141static DEFINE_MUTEX(bcm_device_lock); 142static LIST_HEAD(bcm_device_list); 143 144static int irq_polarity = -1; 145module_param(irq_polarity, int, 0444); 146MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); 147 148static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 149{ 150 if (hu->serdev) 151 serdev_device_set_baudrate(hu->serdev, speed); 152 else 153 hci_uart_set_baudrate(hu, speed); 154} 155 156static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) 157{ 158 struct hci_dev *hdev = hu->hdev; 159 struct sk_buff *skb; 160 struct bcm_update_uart_baud_rate param; 161 162 if (speed > 3000000) { 163 struct bcm_write_uart_clock_setting clock; 164 165 clock.type = BCM_UART_CLOCK_48MHZ; 166 167 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); 168 169 /* This Broadcom specific command changes the UART's controller 170 * clock for baud rate > 3000000. 171 */ 172 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); 173 if (IS_ERR(skb)) { 174 int err = PTR_ERR(skb); 175 bt_dev_err(hdev, "BCM: failed to write clock (%d)", 176 err); 177 return err; 178 } 179 180 kfree_skb(skb); 181 } 182 183 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); 184 185 param.zero = cpu_to_le16(0); 186 param.baud_rate = cpu_to_le32(speed); 187 188 /* This Broadcom specific command changes the UART's controller baud 189 * rate. 190 */ 191 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, 192 HCI_INIT_TIMEOUT); 193 if (IS_ERR(skb)) { 194 int err = PTR_ERR(skb); 195 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", 196 err); 197 return err; 198 } 199 200 kfree_skb(skb); 201 202 return 0; 203} 204 205/* bcm_device_exists should be protected by bcm_device_lock */ 206static bool bcm_device_exists(struct bcm_device *device) 207{ 208 struct list_head *p; 209 210#ifdef CONFIG_PM 211 /* Devices using serdev always exist */ 212 if (device && device->hu && device->hu->serdev) 213 return true; 214#endif 215 216 list_for_each(p, &bcm_device_list) { 217 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 218 219 if (device == dev) 220 return true; 221 } 222 223 return false; 224} 225 226static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) 227{ 228 int err; 229 230 if (powered && !dev->res_enabled) { 231 /* Intel Macs use bcm_apple_get_resources() and don't 232 * have regulator supplies configured. 233 */ 234 if (dev->supplies[0].supply) { 235 err = regulator_bulk_enable(BCM_NUM_SUPPLIES, 236 dev->supplies); 237 if (err) 238 return err; 239 } 240 241 /* LPO clock needs to be 32.768 kHz */ 242 err = clk_set_rate(dev->lpo_clk, 32768); 243 if (err) { 244 dev_err(dev->dev, "Could not set LPO clock rate\n"); 245 goto err_regulator_disable; 246 } 247 248 err = clk_prepare_enable(dev->lpo_clk); 249 if (err) 250 goto err_regulator_disable; 251 252 err = clk_prepare_enable(dev->txco_clk); 253 if (err) 254 goto err_lpo_clk_disable; 255 } 256 257 err = dev->set_shutdown(dev, powered); 258 if (err) 259 goto err_txco_clk_disable; 260 261 err = dev->set_device_wakeup(dev, powered); 262 if (err) 263 goto err_revert_shutdown; 264 265 if (!powered && dev->res_enabled) { 266 clk_disable_unprepare(dev->txco_clk); 267 clk_disable_unprepare(dev->lpo_clk); 268 269 /* Intel Macs use bcm_apple_get_resources() and don't 270 * have regulator supplies configured. 271 */ 272 if (dev->supplies[0].supply) 273 regulator_bulk_disable(BCM_NUM_SUPPLIES, 274 dev->supplies); 275 } 276 277 /* wait for device to power on and come out of reset */ 278 usleep_range(100000, 120000); 279 280 dev->res_enabled = powered; 281 282 return 0; 283 284err_revert_shutdown: 285 dev->set_shutdown(dev, !powered); 286err_txco_clk_disable: 287 if (powered && !dev->res_enabled) 288 clk_disable_unprepare(dev->txco_clk); 289err_lpo_clk_disable: 290 if (powered && !dev->res_enabled) 291 clk_disable_unprepare(dev->lpo_clk); 292err_regulator_disable: 293 if (powered && !dev->res_enabled) 294 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); 295 return err; 296} 297 298#ifdef CONFIG_PM 299static irqreturn_t bcm_host_wake(int irq, void *data) 300{ 301 struct bcm_device *bdev = data; 302 303 bt_dev_dbg(bdev, "Host wake IRQ"); 304 305 pm_runtime_get(bdev->dev); 306 pm_runtime_mark_last_busy(bdev->dev); 307 pm_runtime_put_autosuspend(bdev->dev); 308 309 return IRQ_HANDLED; 310} 311 312static int bcm_request_irq(struct bcm_data *bcm) 313{ 314 struct bcm_device *bdev = bcm->dev; 315 int err; 316 317 mutex_lock(&bcm_device_lock); 318 if (!bcm_device_exists(bdev)) { 319 err = -ENODEV; 320 goto unlock; 321 } 322 323 if (bdev->irq <= 0) { 324 err = -EOPNOTSUPP; 325 goto unlock; 326 } 327 328 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, 329 bdev->irq_active_low ? IRQF_TRIGGER_FALLING : 330 IRQF_TRIGGER_RISING, 331 "host_wake", bdev); 332 if (err) { 333 bdev->irq = err; 334 goto unlock; 335 } 336 337 bdev->irq_acquired = true; 338 339 device_init_wakeup(bdev->dev, true); 340 341 pm_runtime_set_autosuspend_delay(bdev->dev, 342 BCM_AUTOSUSPEND_DELAY); 343 pm_runtime_use_autosuspend(bdev->dev); 344 pm_runtime_set_active(bdev->dev); 345 pm_runtime_enable(bdev->dev); 346 347unlock: 348 mutex_unlock(&bcm_device_lock); 349 350 return err; 351} 352 353static const struct bcm_set_sleep_mode default_sleep_params = { 354 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ 355 .idle_host = 2, /* idle threshold HOST, in 300ms */ 356 .idle_dev = 2, /* idle threshold device, in 300ms */ 357 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ 358 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ 359 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ 360 .combine_modes = 1, /* Combine sleep and LPM flag */ 361 .tristate_control = 0, /* Allow tri-state control of UART tx flag */ 362 /* Irrelevant USB flags */ 363 .usb_auto_sleep = 0, 364 .usb_resume_timeout = 0, 365 .break_to_host = 0, 366 .pulsed_host_wake = 1, 367}; 368 369static int bcm_setup_sleep(struct hci_uart *hu) 370{ 371 struct bcm_data *bcm = hu->priv; 372 struct sk_buff *skb; 373 struct bcm_set_sleep_mode sleep_params = default_sleep_params; 374 375 sleep_params.host_wake_active = !bcm->dev->irq_active_low; 376 377 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), 378 &sleep_params, HCI_INIT_TIMEOUT); 379 if (IS_ERR(skb)) { 380 int err = PTR_ERR(skb); 381 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); 382 return err; 383 } 384 kfree_skb(skb); 385 386 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); 387 388 return 0; 389} 390#else 391static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } 392static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } 393#endif 394 395static int bcm_set_diag(struct hci_dev *hdev, bool enable) 396{ 397 struct hci_uart *hu = hci_get_drvdata(hdev); 398 struct bcm_data *bcm = hu->priv; 399 struct sk_buff *skb; 400 401 if (!test_bit(HCI_RUNNING, &hdev->flags)) 402 return -ENETDOWN; 403 404 skb = bt_skb_alloc(3, GFP_KERNEL); 405 if (!skb) 406 return -ENOMEM; 407 408 skb_put_u8(skb, BCM_LM_DIAG_PKT); 409 skb_put_u8(skb, 0xf0); 410 skb_put_u8(skb, enable); 411 412 skb_queue_tail(&bcm->txq, skb); 413 hci_uart_tx_wakeup(hu); 414 415 return 0; 416} 417 418static int bcm_open(struct hci_uart *hu) 419{ 420 struct bcm_data *bcm; 421 struct list_head *p; 422 int err; 423 424 bt_dev_dbg(hu->hdev, "hu %p", hu); 425 426 if (!hci_uart_has_flow_control(hu)) 427 return -EOPNOTSUPP; 428 429 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); 430 if (!bcm) 431 return -ENOMEM; 432 433 skb_queue_head_init(&bcm->txq); 434 435 hu->priv = bcm; 436 437 mutex_lock(&bcm_device_lock); 438 439 if (hu->serdev) { 440 bcm->dev = serdev_device_get_drvdata(hu->serdev); 441 goto out; 442 } 443 444 if (!hu->tty->dev) 445 goto out; 446 447 list_for_each(p, &bcm_device_list) { 448 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 449 450 /* Retrieve saved bcm_device based on parent of the 451 * platform device (saved during device probe) and 452 * parent of tty device used by hci_uart 453 */ 454 if (hu->tty->dev->parent == dev->dev->parent) { 455 bcm->dev = dev; 456#ifdef CONFIG_PM 457 dev->hu = hu; 458#endif 459 break; 460 } 461 } 462 463out: 464 if (bcm->dev) { 465 if (bcm->dev->drive_rts_on_open) 466 hci_uart_set_flow_control(hu, true); 467 468 hu->init_speed = bcm->dev->init_speed; 469 470 /* If oper_speed is set, ldisc/serdev will set the baudrate 471 * before calling setup() 472 */ 473 if (!bcm->dev->no_early_set_baudrate) 474 hu->oper_speed = bcm->dev->oper_speed; 475 476 err = bcm_gpio_set_power(bcm->dev, true); 477 478 if (bcm->dev->drive_rts_on_open) 479 hci_uart_set_flow_control(hu, false); 480 481 if (err) 482 goto err_unset_hu; 483 } 484 485 mutex_unlock(&bcm_device_lock); 486 return 0; 487 488err_unset_hu: 489#ifdef CONFIG_PM 490 if (!hu->serdev) 491 bcm->dev->hu = NULL; 492#endif 493 mutex_unlock(&bcm_device_lock); 494 hu->priv = NULL; 495 kfree(bcm); 496 return err; 497} 498 499static int bcm_close(struct hci_uart *hu) 500{ 501 struct bcm_data *bcm = hu->priv; 502 struct bcm_device *bdev = NULL; 503 int err; 504 505 bt_dev_dbg(hu->hdev, "hu %p", hu); 506 507 /* Protect bcm->dev against removal of the device or driver */ 508 mutex_lock(&bcm_device_lock); 509 510 if (hu->serdev) { 511 bdev = serdev_device_get_drvdata(hu->serdev); 512 } else if (bcm_device_exists(bcm->dev)) { 513 bdev = bcm->dev; 514#ifdef CONFIG_PM 515 bdev->hu = NULL; 516#endif 517 } 518 519 if (bdev) { 520 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { 521 devm_free_irq(bdev->dev, bdev->irq, bdev); 522 device_init_wakeup(bdev->dev, false); 523 pm_runtime_disable(bdev->dev); 524 } 525 526 err = bcm_gpio_set_power(bdev, false); 527 if (err) 528 bt_dev_err(hu->hdev, "Failed to power down"); 529 else 530 pm_runtime_set_suspended(bdev->dev); 531 } 532 mutex_unlock(&bcm_device_lock); 533 534 skb_queue_purge(&bcm->txq); 535 kfree_skb(bcm->rx_skb); 536 kfree(bcm); 537 538 hu->priv = NULL; 539 return 0; 540} 541 542static int bcm_flush(struct hci_uart *hu) 543{ 544 struct bcm_data *bcm = hu->priv; 545 546 bt_dev_dbg(hu->hdev, "hu %p", hu); 547 548 skb_queue_purge(&bcm->txq); 549 550 return 0; 551} 552 553static int bcm_setup(struct hci_uart *hu) 554{ 555 struct bcm_data *bcm = hu->priv; 556 bool fw_load_done = false; 557 unsigned int speed; 558 int err; 559 560 bt_dev_dbg(hu->hdev, "hu %p", hu); 561 562 hu->hdev->set_diag = bcm_set_diag; 563 hu->hdev->set_bdaddr = btbcm_set_bdaddr; 564 565 err = btbcm_initialize(hu->hdev, &fw_load_done); 566 if (err) 567 return err; 568 569 if (!fw_load_done) 570 return 0; 571 572 /* Init speed if any */ 573 if (hu->init_speed) 574 speed = hu->init_speed; 575 else if (hu->proto->init_speed) 576 speed = hu->proto->init_speed; 577 else 578 speed = 0; 579 580 if (speed) 581 host_set_baudrate(hu, speed); 582 583 /* Operational speed if any */ 584 if (hu->oper_speed) 585 speed = hu->oper_speed; 586 else if (bcm->dev && bcm->dev->oper_speed) 587 speed = bcm->dev->oper_speed; 588 else if (hu->proto->oper_speed) 589 speed = hu->proto->oper_speed; 590 else 591 speed = 0; 592 593 if (speed) { 594 err = bcm_set_baudrate(hu, speed); 595 if (!err) 596 host_set_baudrate(hu, speed); 597 } 598 599 /* PCM parameters if provided */ 600 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) { 601 struct bcm_set_pcm_int_params params; 602 603 btbcm_read_pcm_int_params(hu->hdev, ¶ms); 604 605 memcpy(¶ms, bcm->dev->pcm_int_params, 5); 606 btbcm_write_pcm_int_params(hu->hdev, ¶ms); 607 } 608 609 err = btbcm_finalize(hu->hdev, &fw_load_done); 610 if (err) 611 return err; 612 613 /* Some devices ship with the controller default address. 614 * Allow the bootloader to set a valid address through the 615 * device tree. 616 */ 617 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks); 618 619 if (!bcm_request_irq(bcm)) 620 err = bcm_setup_sleep(hu); 621 622 return err; 623} 624 625#define BCM_RECV_LM_DIAG \ 626 .type = BCM_LM_DIAG_PKT, \ 627 .hlen = BCM_LM_DIAG_SIZE, \ 628 .loff = 0, \ 629 .lsize = 0, \ 630 .maxlen = BCM_LM_DIAG_SIZE 631 632#define BCM_RECV_NULL \ 633 .type = BCM_NULL_PKT, \ 634 .hlen = BCM_NULL_SIZE, \ 635 .loff = 0, \ 636 .lsize = 0, \ 637 .maxlen = BCM_NULL_SIZE 638 639#define BCM_RECV_TYPE49 \ 640 .type = BCM_TYPE49_PKT, \ 641 .hlen = BCM_TYPE49_SIZE, \ 642 .loff = 0, \ 643 .lsize = 0, \ 644 .maxlen = BCM_TYPE49_SIZE 645 646#define BCM_RECV_TYPE52 \ 647 .type = BCM_TYPE52_PKT, \ 648 .hlen = BCM_TYPE52_SIZE, \ 649 .loff = 0, \ 650 .lsize = 0, \ 651 .maxlen = BCM_TYPE52_SIZE 652 653static const struct h4_recv_pkt bcm_recv_pkts[] = { 654 { H4_RECV_ACL, .recv = hci_recv_frame }, 655 { H4_RECV_SCO, .recv = hci_recv_frame }, 656 { H4_RECV_EVENT, .recv = hci_recv_frame }, 657 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, 658 { BCM_RECV_NULL, .recv = hci_recv_diag }, 659 { BCM_RECV_TYPE49, .recv = hci_recv_diag }, 660 { BCM_RECV_TYPE52, .recv = hci_recv_diag }, 661}; 662 663static int bcm_recv(struct hci_uart *hu, const void *data, int count) 664{ 665 struct bcm_data *bcm = hu->priv; 666 667 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 668 return -EUNATCH; 669 670 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, 671 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); 672 if (IS_ERR(bcm->rx_skb)) { 673 int err = PTR_ERR(bcm->rx_skb); 674 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 675 bcm->rx_skb = NULL; 676 return err; 677 } else if (!bcm->rx_skb) { 678 /* Delay auto-suspend when receiving completed packet */ 679 mutex_lock(&bcm_device_lock); 680 if (bcm->dev && bcm_device_exists(bcm->dev)) { 681 pm_runtime_get(bcm->dev->dev); 682 pm_runtime_mark_last_busy(bcm->dev->dev); 683 pm_runtime_put_autosuspend(bcm->dev->dev); 684 } 685 mutex_unlock(&bcm_device_lock); 686 } 687 688 return count; 689} 690 691static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) 692{ 693 struct bcm_data *bcm = hu->priv; 694 695 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); 696 697 /* Prepend skb with frame type */ 698 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 699 skb_queue_tail(&bcm->txq, skb); 700 701 return 0; 702} 703 704static struct sk_buff *bcm_dequeue(struct hci_uart *hu) 705{ 706 struct bcm_data *bcm = hu->priv; 707 struct sk_buff *skb = NULL; 708 struct bcm_device *bdev = NULL; 709 710 mutex_lock(&bcm_device_lock); 711 712 if (bcm_device_exists(bcm->dev)) { 713 bdev = bcm->dev; 714 pm_runtime_get_sync(bdev->dev); 715 /* Shall be resumed here */ 716 } 717 718 skb = skb_dequeue(&bcm->txq); 719 720 if (bdev) { 721 pm_runtime_mark_last_busy(bdev->dev); 722 pm_runtime_put_autosuspend(bdev->dev); 723 } 724 725 mutex_unlock(&bcm_device_lock); 726 727 return skb; 728} 729 730#ifdef CONFIG_PM 731static int bcm_suspend_device(struct device *dev) 732{ 733 struct bcm_device *bdev = dev_get_drvdata(dev); 734 int err; 735 736 bt_dev_dbg(bdev, ""); 737 738 if (!bdev->is_suspended && bdev->hu) { 739 hci_uart_set_flow_control(bdev->hu, true); 740 741 /* Once this returns, driver suspends BT via GPIO */ 742 bdev->is_suspended = true; 743 } 744 745 /* Suspend the device */ 746 err = bdev->set_device_wakeup(bdev, false); 747 if (err) { 748 if (bdev->is_suspended && bdev->hu) { 749 bdev->is_suspended = false; 750 hci_uart_set_flow_control(bdev->hu, false); 751 } 752 return -EBUSY; 753 } 754 755 bt_dev_dbg(bdev, "suspend, delaying 15 ms"); 756 msleep(15); 757 758 return 0; 759} 760 761static int bcm_resume_device(struct device *dev) 762{ 763 struct bcm_device *bdev = dev_get_drvdata(dev); 764 int err; 765 766 bt_dev_dbg(bdev, ""); 767 768 err = bdev->set_device_wakeup(bdev, true); 769 if (err) { 770 dev_err(dev, "Failed to power up\n"); 771 return err; 772 } 773 774 bt_dev_dbg(bdev, "resume, delaying 15 ms"); 775 msleep(15); 776 777 /* When this executes, the device has woken up already */ 778 if (bdev->is_suspended && bdev->hu) { 779 bdev->is_suspended = false; 780 781 hci_uart_set_flow_control(bdev->hu, false); 782 } 783 784 return 0; 785} 786#endif 787 788#ifdef CONFIG_PM_SLEEP 789/* suspend callback */ 790static int bcm_suspend(struct device *dev) 791{ 792 struct bcm_device *bdev = dev_get_drvdata(dev); 793 int error; 794 795 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); 796 797 /* 798 * When used with a device instantiated as platform_device, bcm_suspend 799 * can be called at any time as long as the platform device is bound, 800 * so it should use bcm_device_lock to protect access to hci_uart 801 * and device_wake-up GPIO. 802 */ 803 mutex_lock(&bcm_device_lock); 804 805 if (!bdev->hu) 806 goto unlock; 807 808 if (pm_runtime_active(dev)) 809 bcm_suspend_device(dev); 810 811 if (device_may_wakeup(dev) && bdev->irq > 0) { 812 error = enable_irq_wake(bdev->irq); 813 if (!error) 814 bt_dev_dbg(bdev, "BCM irq: enabled"); 815 } 816 817unlock: 818 mutex_unlock(&bcm_device_lock); 819 820 return 0; 821} 822 823/* resume callback */ 824static int bcm_resume(struct device *dev) 825{ 826 struct bcm_device *bdev = dev_get_drvdata(dev); 827 int err = 0; 828 829 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); 830 831 /* 832 * When used with a device instantiated as platform_device, bcm_resume 833 * can be called at any time as long as platform device is bound, 834 * so it should use bcm_device_lock to protect access to hci_uart 835 * and device_wake-up GPIO. 836 */ 837 mutex_lock(&bcm_device_lock); 838 839 if (!bdev->hu) 840 goto unlock; 841 842 if (device_may_wakeup(dev) && bdev->irq > 0) { 843 disable_irq_wake(bdev->irq); 844 bt_dev_dbg(bdev, "BCM irq: disabled"); 845 } 846 847 err = bcm_resume_device(dev); 848 849unlock: 850 mutex_unlock(&bcm_device_lock); 851 852 if (!err) { 853 pm_runtime_disable(dev); 854 pm_runtime_set_active(dev); 855 pm_runtime_enable(dev); 856 } 857 858 return 0; 859} 860#endif 861 862/* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ 863static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { 864 { 865 .ident = "Meegopad T08", 866 .matches = { 867 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, 868 "To be filled by OEM."), 869 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), 870 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), 871 }, 872 }, 873 { } 874}; 875 876#ifdef CONFIG_ACPI 877static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 878static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 879static const struct acpi_gpio_params third_gpio = { 2, 0, false }; 880 881static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { 882 { "device-wakeup-gpios", &first_gpio, 1 }, 883 { "shutdown-gpios", &second_gpio, 1 }, 884 { "host-wakeup-gpios", &third_gpio, 1 }, 885 { }, 886}; 887 888static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { 889 { "host-wakeup-gpios", &first_gpio, 1 }, 890 { "device-wakeup-gpios", &second_gpio, 1 }, 891 { "shutdown-gpios", &third_gpio, 1 }, 892 { }, 893}; 894 895static int bcm_resource(struct acpi_resource *ares, void *data) 896{ 897 struct bcm_device *dev = data; 898 struct acpi_resource_extended_irq *irq; 899 struct acpi_resource_gpio *gpio; 900 struct acpi_resource_uart_serialbus *sb; 901 902 switch (ares->type) { 903 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 904 irq = &ares->data.extended_irq; 905 if (irq->polarity != ACPI_ACTIVE_LOW) 906 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); 907 dev->irq_active_low = true; 908 break; 909 910 case ACPI_RESOURCE_TYPE_GPIO: 911 gpio = &ares->data.gpio; 912 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 913 dev->gpio_int_idx = dev->gpio_count; 914 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; 915 } 916 dev->gpio_count++; 917 break; 918 919 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 920 sb = &ares->data.uart_serial_bus; 921 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { 922 dev->init_speed = sb->default_baud_rate; 923 dev->oper_speed = 4000000; 924 } 925 break; 926 927 default: 928 break; 929 } 930 931 return 0; 932} 933 934static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) 935{ 936 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) 937 return -EIO; 938 939 return 0; 940} 941 942static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) 943{ 944 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, 945 NULL, NULL, NULL))) 946 return -EIO; 947 948 return 0; 949} 950 951static int bcm_apple_get_resources(struct bcm_device *dev) 952{ 953 struct acpi_device *adev = ACPI_COMPANION(dev->dev); 954 const union acpi_object *obj; 955 956 if (!adev || 957 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || 958 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || 959 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) 960 return -ENODEV; 961 962 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && 963 obj->buffer.length == 8) 964 dev->init_speed = *(u64 *)obj->buffer.pointer; 965 966 dev->set_device_wakeup = bcm_apple_set_device_wakeup; 967 dev->set_shutdown = bcm_apple_set_shutdown; 968 969 return 0; 970} 971#else 972static inline int bcm_apple_get_resources(struct bcm_device *dev) 973{ 974 return -EOPNOTSUPP; 975} 976#endif /* CONFIG_ACPI */ 977 978static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) 979{ 980 gpiod_set_value_cansleep(dev->device_wakeup, awake); 981 return 0; 982} 983 984static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) 985{ 986 gpiod_set_value_cansleep(dev->shutdown, powered); 987 return 0; 988} 989 990/* Try a bunch of names for TXCO */ 991static struct clk *bcm_get_txco(struct device *dev) 992{ 993 struct clk *clk; 994 995 /* New explicit name */ 996 clk = devm_clk_get(dev, "txco"); 997 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 998 return clk; 999 1000 /* Deprecated name */ 1001 clk = devm_clk_get(dev, "extclk"); 1002 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1003 return clk; 1004 1005 /* Original code used no name at all */ 1006 return devm_clk_get(dev, NULL); 1007} 1008 1009static int bcm_get_resources(struct bcm_device *dev) 1010{ 1011 const struct dmi_system_id *dmi_id; 1012 int err; 1013 1014 dev->name = dev_name(dev->dev); 1015 1016 if (x86_apple_machine && !bcm_apple_get_resources(dev)) 1017 return 0; 1018 1019 dev->txco_clk = bcm_get_txco(dev->dev); 1020 1021 /* Handle deferred probing */ 1022 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) 1023 return PTR_ERR(dev->txco_clk); 1024 1025 /* Ignore all other errors as before */ 1026 if (IS_ERR(dev->txco_clk)) 1027 dev->txco_clk = NULL; 1028 1029 dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); 1030 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) 1031 return PTR_ERR(dev->lpo_clk); 1032 1033 if (IS_ERR(dev->lpo_clk)) 1034 dev->lpo_clk = NULL; 1035 1036 /* Check if we accidentally fetched the lpo clock twice */ 1037 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { 1038 devm_clk_put(dev->dev, dev->txco_clk); 1039 dev->txco_clk = NULL; 1040 } 1041 1042 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", 1043 GPIOD_OUT_LOW); 1044 if (IS_ERR(dev->device_wakeup)) 1045 return PTR_ERR(dev->device_wakeup); 1046 1047 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", 1048 GPIOD_OUT_LOW); 1049 if (IS_ERR(dev->shutdown)) 1050 return PTR_ERR(dev->shutdown); 1051 1052 dev->set_device_wakeup = bcm_gpio_set_device_wakeup; 1053 dev->set_shutdown = bcm_gpio_set_shutdown; 1054 1055 dev->supplies[0].supply = "vbat"; 1056 dev->supplies[1].supply = "vddio"; 1057 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, 1058 dev->supplies); 1059 if (err) 1060 return err; 1061 1062 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ 1063 if (dev->irq <= 0) { 1064 struct gpio_desc *gpio; 1065 1066 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", 1067 GPIOD_IN); 1068 if (IS_ERR(gpio)) 1069 return PTR_ERR(gpio); 1070 1071 dev->irq = gpiod_to_irq(gpio); 1072 } 1073 1074 dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); 1075 if (dmi_id) { 1076 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", 1077 dmi_id->ident); 1078 dev->irq = 0; 1079 } 1080 1081 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); 1082 return 0; 1083} 1084 1085#ifdef CONFIG_ACPI 1086static int bcm_acpi_probe(struct bcm_device *dev) 1087{ 1088 LIST_HEAD(resources); 1089 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; 1090 struct resource_entry *entry; 1091 int ret; 1092 1093 /* Retrieve UART ACPI info */ 1094 dev->gpio_int_idx = -1; 1095 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), 1096 &resources, bcm_resource, dev); 1097 if (ret < 0) 1098 return ret; 1099 1100 resource_list_for_each_entry(entry, &resources) { 1101 if (resource_type(entry->res) == IORESOURCE_IRQ) { 1102 dev->irq = entry->res->start; 1103 break; 1104 } 1105 } 1106 acpi_dev_free_resource_list(&resources); 1107 1108 /* If the DSDT uses an Interrupt resource for the IRQ, then there are 1109 * only 2 GPIO resources, we use the irq-last mapping for this, since 1110 * we already have an irq the 3th / last mapping will not be used. 1111 */ 1112 if (dev->irq) 1113 gpio_mapping = acpi_bcm_int_last_gpios; 1114 else if (dev->gpio_int_idx == 0) 1115 gpio_mapping = acpi_bcm_int_first_gpios; 1116 else if (dev->gpio_int_idx == 2) 1117 gpio_mapping = acpi_bcm_int_last_gpios; 1118 else 1119 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", 1120 dev->gpio_int_idx); 1121 1122 /* Warn if our expectations are not met. */ 1123 if (dev->gpio_count != (dev->irq ? 2 : 3)) 1124 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", 1125 dev->gpio_count); 1126 1127 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); 1128 if (ret) 1129 return ret; 1130 1131 if (irq_polarity != -1) { 1132 dev->irq_active_low = irq_polarity; 1133 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", 1134 dev->irq_active_low ? "low" : "high"); 1135 } 1136 1137 return 0; 1138} 1139#else 1140static int bcm_acpi_probe(struct bcm_device *dev) 1141{ 1142 return -EINVAL; 1143} 1144#endif /* CONFIG_ACPI */ 1145 1146static int bcm_of_probe(struct bcm_device *bdev) 1147{ 1148 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); 1149 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params", 1150 bdev->pcm_int_params, 5); 1151 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup"); 1152 bdev->irq_active_low = irq_get_trigger_type(bdev->irq) 1153 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW); 1154 return 0; 1155} 1156 1157static int bcm_probe(struct platform_device *pdev) 1158{ 1159 struct bcm_device *dev; 1160 int ret; 1161 1162 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 1163 if (!dev) 1164 return -ENOMEM; 1165 1166 dev->dev = &pdev->dev; 1167 1168 ret = platform_get_irq(pdev, 0); 1169 if (ret < 0) 1170 return ret; 1171 1172 dev->irq = ret; 1173 1174 /* Initialize routing field to an unused value */ 1175 dev->pcm_int_params[0] = 0xff; 1176 1177 if (has_acpi_companion(&pdev->dev)) { 1178 ret = bcm_acpi_probe(dev); 1179 if (ret) 1180 return ret; 1181 } 1182 1183 ret = bcm_get_resources(dev); 1184 if (ret) 1185 return ret; 1186 1187 platform_set_drvdata(pdev, dev); 1188 1189 dev_info(&pdev->dev, "%s device registered.\n", dev->name); 1190 1191 /* Place this instance on the device list */ 1192 mutex_lock(&bcm_device_lock); 1193 list_add_tail(&dev->list, &bcm_device_list); 1194 mutex_unlock(&bcm_device_lock); 1195 1196 ret = bcm_gpio_set_power(dev, false); 1197 if (ret) 1198 dev_err(&pdev->dev, "Failed to power down\n"); 1199 1200 return 0; 1201} 1202 1203static int bcm_remove(struct platform_device *pdev) 1204{ 1205 struct bcm_device *dev = platform_get_drvdata(pdev); 1206 1207 mutex_lock(&bcm_device_lock); 1208 list_del(&dev->list); 1209 mutex_unlock(&bcm_device_lock); 1210 1211 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); 1212 1213 return 0; 1214} 1215 1216static const struct hci_uart_proto bcm_proto = { 1217 .id = HCI_UART_BCM, 1218 .name = "Broadcom", 1219 .manufacturer = 15, 1220 .init_speed = 115200, 1221 .open = bcm_open, 1222 .close = bcm_close, 1223 .flush = bcm_flush, 1224 .setup = bcm_setup, 1225 .set_baudrate = bcm_set_baudrate, 1226 .recv = bcm_recv, 1227 .enqueue = bcm_enqueue, 1228 .dequeue = bcm_dequeue, 1229}; 1230 1231#ifdef CONFIG_ACPI 1232static const struct acpi_device_id bcm_acpi_match[] = { 1233 { "BCM2E00" }, 1234 { "BCM2E01" }, 1235 { "BCM2E02" }, 1236 { "BCM2E03" }, 1237 { "BCM2E04" }, 1238 { "BCM2E05" }, 1239 { "BCM2E06" }, 1240 { "BCM2E07" }, 1241 { "BCM2E08" }, 1242 { "BCM2E09" }, 1243 { "BCM2E0A" }, 1244 { "BCM2E0B" }, 1245 { "BCM2E0C" }, 1246 { "BCM2E0D" }, 1247 { "BCM2E0E" }, 1248 { "BCM2E0F" }, 1249 { "BCM2E10" }, 1250 { "BCM2E11" }, 1251 { "BCM2E12" }, 1252 { "BCM2E13" }, 1253 { "BCM2E14" }, 1254 { "BCM2E15" }, 1255 { "BCM2E16" }, 1256 { "BCM2E17" }, 1257 { "BCM2E18" }, 1258 { "BCM2E19" }, 1259 { "BCM2E1A" }, 1260 { "BCM2E1B" }, 1261 { "BCM2E1C" }, 1262 { "BCM2E1D" }, 1263 { "BCM2E1F" }, 1264 { "BCM2E20" }, 1265 { "BCM2E21" }, 1266 { "BCM2E22" }, 1267 { "BCM2E23" }, 1268 { "BCM2E24" }, 1269 { "BCM2E25" }, 1270 { "BCM2E26" }, 1271 { "BCM2E27" }, 1272 { "BCM2E28" }, 1273 { "BCM2E29" }, 1274 { "BCM2E2A" }, 1275 { "BCM2E2B" }, 1276 { "BCM2E2C" }, 1277 { "BCM2E2D" }, 1278 { "BCM2E2E" }, 1279 { "BCM2E2F" }, 1280 { "BCM2E30" }, 1281 { "BCM2E31" }, 1282 { "BCM2E32" }, 1283 { "BCM2E33" }, 1284 { "BCM2E34" }, 1285 { "BCM2E35" }, 1286 { "BCM2E36" }, 1287 { "BCM2E37" }, 1288 { "BCM2E38" }, 1289 { "BCM2E39" }, 1290 { "BCM2E3A" }, 1291 { "BCM2E3B" }, 1292 { "BCM2E3C" }, 1293 { "BCM2E3D" }, 1294 { "BCM2E3E" }, 1295 { "BCM2E3F" }, 1296 { "BCM2E40" }, 1297 { "BCM2E41" }, 1298 { "BCM2E42" }, 1299 { "BCM2E43" }, 1300 { "BCM2E44" }, 1301 { "BCM2E45" }, 1302 { "BCM2E46" }, 1303 { "BCM2E47" }, 1304 { "BCM2E48" }, 1305 { "BCM2E49" }, 1306 { "BCM2E4A" }, 1307 { "BCM2E4B" }, 1308 { "BCM2E4C" }, 1309 { "BCM2E4D" }, 1310 { "BCM2E4E" }, 1311 { "BCM2E4F" }, 1312 { "BCM2E50" }, 1313 { "BCM2E51" }, 1314 { "BCM2E52" }, 1315 { "BCM2E53" }, 1316 { "BCM2E54" }, 1317 { "BCM2E55" }, 1318 { "BCM2E56" }, 1319 { "BCM2E57" }, 1320 { "BCM2E58" }, 1321 { "BCM2E59" }, 1322 { "BCM2E5A" }, 1323 { "BCM2E5B" }, 1324 { "BCM2E5C" }, 1325 { "BCM2E5D" }, 1326 { "BCM2E5E" }, 1327 { "BCM2E5F" }, 1328 { "BCM2E60" }, 1329 { "BCM2E61" }, 1330 { "BCM2E62" }, 1331 { "BCM2E63" }, 1332 { "BCM2E64" }, 1333 { "BCM2E65" }, 1334 { "BCM2E66" }, 1335 { "BCM2E67" }, 1336 { "BCM2E68" }, 1337 { "BCM2E69" }, 1338 { "BCM2E6B" }, 1339 { "BCM2E6D" }, 1340 { "BCM2E6E" }, 1341 { "BCM2E6F" }, 1342 { "BCM2E70" }, 1343 { "BCM2E71" }, 1344 { "BCM2E72" }, 1345 { "BCM2E73" }, 1346 { "BCM2E74" }, 1347 { "BCM2E75" }, 1348 { "BCM2E76" }, 1349 { "BCM2E77" }, 1350 { "BCM2E78" }, 1351 { "BCM2E79" }, 1352 { "BCM2E7A" }, 1353 { "BCM2E7B" }, 1354 { "BCM2E7C" }, 1355 { "BCM2E7D" }, 1356 { "BCM2E7E" }, 1357 { "BCM2E7F" }, 1358 { "BCM2E80" }, 1359 { "BCM2E81" }, 1360 { "BCM2E82" }, 1361 { "BCM2E83" }, 1362 { "BCM2E84" }, 1363 { "BCM2E85" }, 1364 { "BCM2E86" }, 1365 { "BCM2E87" }, 1366 { "BCM2E88" }, 1367 { "BCM2E89" }, 1368 { "BCM2E8A" }, 1369 { "BCM2E8B" }, 1370 { "BCM2E8C" }, 1371 { "BCM2E8D" }, 1372 { "BCM2E8E" }, 1373 { "BCM2E90" }, 1374 { "BCM2E92" }, 1375 { "BCM2E93" }, 1376 { "BCM2E94" }, 1377 { "BCM2E95" }, 1378 { "BCM2E96" }, 1379 { "BCM2E97" }, 1380 { "BCM2E98" }, 1381 { "BCM2E99" }, 1382 { "BCM2E9A" }, 1383 { "BCM2E9B" }, 1384 { "BCM2E9C" }, 1385 { "BCM2E9D" }, 1386 { "BCM2EA0" }, 1387 { "BCM2EA1" }, 1388 { "BCM2EA2" }, 1389 { "BCM2EA3" }, 1390 { "BCM2EA4" }, 1391 { "BCM2EA5" }, 1392 { "BCM2EA6" }, 1393 { "BCM2EA7" }, 1394 { "BCM2EA8" }, 1395 { "BCM2EA9" }, 1396 { "BCM2EAA" }, 1397 { "BCM2EAB" }, 1398 { "BCM2EAC" }, 1399 { }, 1400}; 1401MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); 1402#endif 1403 1404/* suspend and resume callbacks */ 1405static const struct dev_pm_ops bcm_pm_ops = { 1406 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) 1407 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) 1408}; 1409 1410static struct platform_driver bcm_driver = { 1411 .probe = bcm_probe, 1412 .remove = bcm_remove, 1413 .driver = { 1414 .name = "hci_bcm", 1415 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1416 .pm = &bcm_pm_ops, 1417 }, 1418}; 1419 1420static int bcm_serdev_probe(struct serdev_device *serdev) 1421{ 1422 struct bcm_device *bcmdev; 1423 const struct bcm_device_data *data; 1424 int err; 1425 1426 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); 1427 if (!bcmdev) 1428 return -ENOMEM; 1429 1430 bcmdev->dev = &serdev->dev; 1431#ifdef CONFIG_PM 1432 bcmdev->hu = &bcmdev->serdev_hu; 1433#endif 1434 bcmdev->serdev_hu.serdev = serdev; 1435 serdev_device_set_drvdata(serdev, bcmdev); 1436 1437 /* Initialize routing field to an unused value */ 1438 bcmdev->pcm_int_params[0] = 0xff; 1439 1440 if (has_acpi_companion(&serdev->dev)) 1441 err = bcm_acpi_probe(bcmdev); 1442 else 1443 err = bcm_of_probe(bcmdev); 1444 if (err) 1445 return err; 1446 1447 err = bcm_get_resources(bcmdev); 1448 if (err) 1449 return err; 1450 1451 if (!bcmdev->shutdown) { 1452 dev_warn(&serdev->dev, 1453 "No reset resource, using default baud rate\n"); 1454 bcmdev->oper_speed = bcmdev->init_speed; 1455 } 1456 1457 err = bcm_gpio_set_power(bcmdev, false); 1458 if (err) 1459 dev_err(&serdev->dev, "Failed to power down\n"); 1460 1461 data = device_get_match_data(bcmdev->dev); 1462 if (data) { 1463 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; 1464 bcmdev->drive_rts_on_open = data->drive_rts_on_open; 1465 } 1466 1467 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); 1468} 1469 1470static void bcm_serdev_remove(struct serdev_device *serdev) 1471{ 1472 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); 1473 1474 hci_uart_unregister_device(&bcmdev->serdev_hu); 1475} 1476 1477#ifdef CONFIG_OF 1478static struct bcm_device_data bcm4354_device_data = { 1479 .no_early_set_baudrate = true, 1480}; 1481 1482static struct bcm_device_data bcm43438_device_data = { 1483 .drive_rts_on_open = true, 1484}; 1485 1486static const struct of_device_id bcm_bluetooth_of_match[] = { 1487 { .compatible = "brcm,bcm20702a1" }, 1488 { .compatible = "brcm,bcm4329-bt" }, 1489 { .compatible = "brcm,bcm4345c5" }, 1490 { .compatible = "brcm,bcm4330-bt" }, 1491 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, 1492 { .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data }, 1493 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, 1494 { .compatible = "brcm,bcm4335a0" }, 1495 { .compatible = "infineon,cyw55572-bt" }, 1496 { }, 1497}; 1498MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); 1499#endif 1500 1501static struct serdev_device_driver bcm_serdev_driver = { 1502 .probe = bcm_serdev_probe, 1503 .remove = bcm_serdev_remove, 1504 .driver = { 1505 .name = "hci_uart_bcm", 1506 .of_match_table = of_match_ptr(bcm_bluetooth_of_match), 1507 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1508 .pm = &bcm_pm_ops, 1509 }, 1510}; 1511 1512int __init bcm_init(void) 1513{ 1514 /* For now, we need to keep both platform device 1515 * driver (ACPI generated) and serdev driver (DT). 1516 */ 1517 platform_driver_register(&bcm_driver); 1518 serdev_device_driver_register(&bcm_serdev_driver); 1519 1520 return hci_uart_register_proto(&bcm_proto); 1521} 1522 1523int __exit bcm_deinit(void) 1524{ 1525 platform_driver_unregister(&bcm_driver); 1526 serdev_device_driver_unregister(&bcm_serdev_driver); 1527 1528 return hci_uart_unregister_proto(&bcm_proto); 1529} 1530