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/gpio/machine.h> 24 #include <linux/tty.h> 25 #include <linux/interrupt.h> 26 #include <linux/dmi.h> 27 #include <linux/pm_runtime.h> 28 #include <linux/serdev.h> 29 30 #include <net/bluetooth/bluetooth.h> 31 #include <net/bluetooth/hci_core.h> 32 33 #include "btbcm.h" 34 #include "hci_uart.h" 35 36 #define BCM_NULL_PKT 0x00 37 #define BCM_NULL_SIZE 0 38 39 #define BCM_LM_DIAG_PKT 0x07 40 #define BCM_LM_DIAG_SIZE 63 41 42 #define BCM_TYPE49_PKT 0x31 43 #define BCM_TYPE49_SIZE 0 44 45 #define BCM_TYPE52_PKT 0x34 46 #define BCM_TYPE52_SIZE 0 47 48 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ 49 50 #define BCM_NUM_SUPPLIES 2 51 52 /** 53 * struct bcm_device_data - device specific data 54 * @no_early_set_baudrate: Disallow set baudrate before driver setup() 55 * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it 56 */ 57 struct bcm_device_data { 58 bool no_early_set_baudrate; 59 bool drive_rts_on_open; 60 }; 61 62 /** 63 * struct bcm_device - device driver resources 64 * @serdev_hu: HCI UART controller struct 65 * @list: bcm_device_list node 66 * @dev: physical UART slave 67 * @name: device name logged by bt_dev_*() functions 68 * @device_wakeup: BT_WAKE pin, 69 * assert = Bluetooth device must wake up or remain awake, 70 * deassert = Bluetooth device may sleep when sleep criteria are met 71 * @shutdown: BT_REG_ON pin, 72 * power up or power down Bluetooth device internal regulators 73 * @reset: BT_RST_N pin, 74 * active low resets the Bluetooth logic core 75 * @set_device_wakeup: callback to toggle BT_WAKE pin 76 * either by accessing @device_wakeup or by calling @btlp 77 * @set_shutdown: callback to toggle BT_REG_ON pin 78 * either by accessing @shutdown or by calling @btpu/@btpd 79 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") 80 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") 81 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") 82 * @gpio_count: internal counter for GPIO resources associated with ACPI device 83 * @gpio_int_idx: index in _CRS for GpioInt() resource 84 * @txco_clk: external reference frequency clock used by Bluetooth device 85 * @lpo_clk: external LPO clock used by Bluetooth device 86 * @supplies: VBAT and VDDIO supplies used by Bluetooth device 87 * @res_enabled: whether clocks and supplies are prepared and enabled 88 * @init_speed: default baudrate of Bluetooth device; 89 * the host UART is initially set to this baudrate so that 90 * it can configure the Bluetooth device for @oper_speed 91 * @oper_speed: preferred baudrate of Bluetooth device; 92 * set to 0 if @init_speed is already the preferred baudrate 93 * @irq: interrupt triggered by HOST_WAKE_BT pin 94 * @irq_active_low: whether @irq is active low 95 * @irq_acquired: flag to show if IRQ handler has been assigned 96 * @hu: pointer to HCI UART controller struct, 97 * used to disable flow control during runtime suspend and system sleep 98 * @is_suspended: whether flow control is currently disabled 99 * @no_early_set_baudrate: don't set_baudrate before setup() 100 * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it 101 * @pcm_int_params: keep the initial PCM configuration 102 */ 103 struct bcm_device { 104 /* Must be the first member, hci_serdev.c expects this. */ 105 struct hci_uart serdev_hu; 106 struct list_head list; 107 108 struct device *dev; 109 110 const char *name; 111 struct gpio_desc *device_wakeup; 112 struct gpio_desc *shutdown; 113 struct gpio_desc *reset; 114 int (*set_device_wakeup)(struct bcm_device *, bool); 115 int (*set_shutdown)(struct bcm_device *, bool); 116 #ifdef CONFIG_ACPI 117 acpi_handle btlp, btpu, btpd; 118 int gpio_count; 119 int gpio_int_idx; 120 #endif 121 122 struct clk *txco_clk; 123 struct clk *lpo_clk; 124 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; 125 bool res_enabled; 126 127 u32 init_speed; 128 u32 oper_speed; 129 int irq; 130 bool irq_active_low; 131 bool irq_acquired; 132 133 #ifdef CONFIG_PM 134 struct hci_uart *hu; 135 bool is_suspended; 136 #endif 137 bool no_early_set_baudrate; 138 bool drive_rts_on_open; 139 u8 pcm_int_params[5]; 140 }; 141 142 /* generic bcm uart resources */ 143 struct bcm_data { 144 struct sk_buff *rx_skb; 145 struct sk_buff_head txq; 146 147 struct bcm_device *dev; 148 }; 149 150 /* List of BCM BT UART devices */ 151 static DEFINE_MUTEX(bcm_device_lock); 152 static LIST_HEAD(bcm_device_list); 153 154 static int irq_polarity = -1; 155 module_param(irq_polarity, int, 0444); 156 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); 157 158 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 159 { 160 if (hu->serdev) 161 serdev_device_set_baudrate(hu->serdev, speed); 162 else 163 hci_uart_set_baudrate(hu, speed); 164 } 165 166 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) 167 { 168 struct hci_dev *hdev = hu->hdev; 169 struct sk_buff *skb; 170 struct bcm_update_uart_baud_rate param; 171 172 if (speed > 3000000) { 173 struct bcm_write_uart_clock_setting clock; 174 175 clock.type = BCM_UART_CLOCK_48MHZ; 176 177 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); 178 179 /* This Broadcom specific command changes the UART's controller 180 * clock for baud rate > 3000000. 181 */ 182 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); 183 if (IS_ERR(skb)) { 184 int err = PTR_ERR(skb); 185 bt_dev_err(hdev, "BCM: failed to write clock (%d)", 186 err); 187 return err; 188 } 189 190 kfree_skb(skb); 191 } 192 193 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); 194 195 param.zero = cpu_to_le16(0); 196 param.baud_rate = cpu_to_le32(speed); 197 198 /* This Broadcom specific command changes the UART's controller baud 199 * rate. 200 */ 201 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, 202 HCI_INIT_TIMEOUT); 203 if (IS_ERR(skb)) { 204 int err = PTR_ERR(skb); 205 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", 206 err); 207 return err; 208 } 209 210 kfree_skb(skb); 211 212 return 0; 213 } 214 215 /* bcm_device_exists should be protected by bcm_device_lock */ 216 static bool bcm_device_exists(struct bcm_device *device) 217 { 218 struct list_head *p; 219 220 #ifdef CONFIG_PM 221 /* Devices using serdev always exist */ 222 if (device && device->hu && device->hu->serdev) 223 return true; 224 #endif 225 226 list_for_each(p, &bcm_device_list) { 227 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 228 229 if (device == dev) 230 return true; 231 } 232 233 return false; 234 } 235 236 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) 237 { 238 int err; 239 240 if (powered && !dev->res_enabled) { 241 /* Intel Macs use bcm_apple_get_resources() and don't 242 * have regulator supplies configured. 243 */ 244 if (dev->supplies[0].supply) { 245 err = regulator_bulk_enable(BCM_NUM_SUPPLIES, 246 dev->supplies); 247 if (err) 248 return err; 249 } 250 251 /* LPO clock needs to be 32.768 kHz */ 252 err = clk_set_rate(dev->lpo_clk, 32768); 253 if (err) { 254 dev_err(dev->dev, "Could not set LPO clock rate\n"); 255 goto err_regulator_disable; 256 } 257 258 err = clk_prepare_enable(dev->lpo_clk); 259 if (err) 260 goto err_regulator_disable; 261 262 err = clk_prepare_enable(dev->txco_clk); 263 if (err) 264 goto err_lpo_clk_disable; 265 } 266 267 err = dev->set_shutdown(dev, powered); 268 if (err) 269 goto err_txco_clk_disable; 270 271 err = dev->set_device_wakeup(dev, powered); 272 if (err) 273 goto err_revert_shutdown; 274 275 if (!powered && dev->res_enabled) { 276 clk_disable_unprepare(dev->txco_clk); 277 clk_disable_unprepare(dev->lpo_clk); 278 279 /* Intel Macs use bcm_apple_get_resources() and don't 280 * have regulator supplies configured. 281 */ 282 if (dev->supplies[0].supply) 283 regulator_bulk_disable(BCM_NUM_SUPPLIES, 284 dev->supplies); 285 } 286 287 /* wait for device to power on and come out of reset */ 288 usleep_range(100000, 120000); 289 290 dev->res_enabled = powered; 291 292 return 0; 293 294 err_revert_shutdown: 295 dev->set_shutdown(dev, !powered); 296 err_txco_clk_disable: 297 if (powered && !dev->res_enabled) 298 clk_disable_unprepare(dev->txco_clk); 299 err_lpo_clk_disable: 300 if (powered && !dev->res_enabled) 301 clk_disable_unprepare(dev->lpo_clk); 302 err_regulator_disable: 303 if (powered && !dev->res_enabled) 304 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); 305 return err; 306 } 307 308 #ifdef CONFIG_PM 309 static irqreturn_t bcm_host_wake(int irq, void *data) 310 { 311 struct bcm_device *bdev = data; 312 313 bt_dev_dbg(bdev, "Host wake IRQ"); 314 315 pm_runtime_get(bdev->dev); 316 pm_runtime_mark_last_busy(bdev->dev); 317 pm_runtime_put_autosuspend(bdev->dev); 318 319 return IRQ_HANDLED; 320 } 321 322 static int bcm_request_irq(struct bcm_data *bcm) 323 { 324 struct bcm_device *bdev = bcm->dev; 325 int err; 326 327 mutex_lock(&bcm_device_lock); 328 if (!bcm_device_exists(bdev)) { 329 err = -ENODEV; 330 goto unlock; 331 } 332 333 if (bdev->irq <= 0) { 334 err = -EOPNOTSUPP; 335 goto unlock; 336 } 337 338 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, 339 bdev->irq_active_low ? IRQF_TRIGGER_FALLING : 340 IRQF_TRIGGER_RISING, 341 "host_wake", bdev); 342 if (err) { 343 bdev->irq = err; 344 goto unlock; 345 } 346 347 bdev->irq_acquired = true; 348 349 device_init_wakeup(bdev->dev, true); 350 351 pm_runtime_set_autosuspend_delay(bdev->dev, 352 BCM_AUTOSUSPEND_DELAY); 353 pm_runtime_use_autosuspend(bdev->dev); 354 pm_runtime_set_active(bdev->dev); 355 pm_runtime_enable(bdev->dev); 356 357 unlock: 358 mutex_unlock(&bcm_device_lock); 359 360 return err; 361 } 362 363 static const struct bcm_set_sleep_mode default_sleep_params = { 364 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ 365 .idle_host = 2, /* idle threshold HOST, in 300ms */ 366 .idle_dev = 2, /* idle threshold device, in 300ms */ 367 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ 368 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ 369 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ 370 .combine_modes = 1, /* Combine sleep and LPM flag */ 371 .tristate_control = 0, /* Allow tri-state control of UART tx flag */ 372 /* Irrelevant USB flags */ 373 .usb_auto_sleep = 0, 374 .usb_resume_timeout = 0, 375 .break_to_host = 0, 376 .pulsed_host_wake = 1, 377 }; 378 379 static int bcm_setup_sleep(struct hci_uart *hu) 380 { 381 struct bcm_data *bcm = hu->priv; 382 struct sk_buff *skb; 383 struct bcm_set_sleep_mode sleep_params = default_sleep_params; 384 385 sleep_params.host_wake_active = !bcm->dev->irq_active_low; 386 387 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), 388 &sleep_params, HCI_INIT_TIMEOUT); 389 if (IS_ERR(skb)) { 390 int err = PTR_ERR(skb); 391 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); 392 return err; 393 } 394 kfree_skb(skb); 395 396 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); 397 398 return 0; 399 } 400 #else 401 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } 402 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } 403 #endif 404 405 static int bcm_set_diag(struct hci_dev *hdev, bool enable) 406 { 407 struct hci_uart *hu = hci_get_drvdata(hdev); 408 struct bcm_data *bcm = hu->priv; 409 struct sk_buff *skb; 410 411 if (!test_bit(HCI_RUNNING, &hdev->flags)) 412 return -ENETDOWN; 413 414 skb = bt_skb_alloc(3, GFP_KERNEL); 415 if (!skb) 416 return -ENOMEM; 417 418 skb_put_u8(skb, BCM_LM_DIAG_PKT); 419 skb_put_u8(skb, 0xf0); 420 skb_put_u8(skb, enable); 421 422 skb_queue_tail(&bcm->txq, skb); 423 hci_uart_tx_wakeup(hu); 424 425 return 0; 426 } 427 428 static int bcm_open(struct hci_uart *hu) 429 { 430 struct bcm_data *bcm; 431 struct list_head *p; 432 int err; 433 434 bt_dev_dbg(hu->hdev, "hu %p", hu); 435 436 if (!hci_uart_has_flow_control(hu)) 437 return -EOPNOTSUPP; 438 439 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); 440 if (!bcm) 441 return -ENOMEM; 442 443 skb_queue_head_init(&bcm->txq); 444 445 hu->priv = bcm; 446 447 mutex_lock(&bcm_device_lock); 448 449 if (hu->serdev) { 450 bcm->dev = serdev_device_get_drvdata(hu->serdev); 451 goto out; 452 } 453 454 if (!hu->tty->dev) 455 goto out; 456 457 list_for_each(p, &bcm_device_list) { 458 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 459 460 /* Retrieve saved bcm_device based on parent of the 461 * platform device (saved during device probe) and 462 * parent of tty device used by hci_uart 463 */ 464 if (hu->tty->dev->parent == dev->dev->parent) { 465 bcm->dev = dev; 466 #ifdef CONFIG_PM 467 dev->hu = hu; 468 #endif 469 break; 470 } 471 } 472 473 out: 474 if (bcm->dev) { 475 if (bcm->dev->drive_rts_on_open) 476 hci_uart_set_flow_control(hu, true); 477 478 hu->init_speed = bcm->dev->init_speed; 479 480 /* If oper_speed is set, ldisc/serdev will set the baudrate 481 * before calling setup() 482 */ 483 if (!bcm->dev->no_early_set_baudrate) 484 hu->oper_speed = bcm->dev->oper_speed; 485 486 err = bcm_gpio_set_power(bcm->dev, true); 487 488 if (bcm->dev->drive_rts_on_open) 489 hci_uart_set_flow_control(hu, false); 490 491 if (err) 492 goto err_unset_hu; 493 } 494 495 mutex_unlock(&bcm_device_lock); 496 return 0; 497 498 err_unset_hu: 499 #ifdef CONFIG_PM 500 if (!hu->serdev) 501 bcm->dev->hu = NULL; 502 #endif 503 mutex_unlock(&bcm_device_lock); 504 hu->priv = NULL; 505 kfree(bcm); 506 return err; 507 } 508 509 static int bcm_close(struct hci_uart *hu) 510 { 511 struct bcm_data *bcm = hu->priv; 512 struct bcm_device *bdev = NULL; 513 int err; 514 515 bt_dev_dbg(hu->hdev, "hu %p", hu); 516 517 /* Protect bcm->dev against removal of the device or driver */ 518 mutex_lock(&bcm_device_lock); 519 520 if (hu->serdev) { 521 bdev = serdev_device_get_drvdata(hu->serdev); 522 } else if (bcm_device_exists(bcm->dev)) { 523 bdev = bcm->dev; 524 #ifdef CONFIG_PM 525 bdev->hu = NULL; 526 #endif 527 } 528 529 if (bdev) { 530 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { 531 devm_free_irq(bdev->dev, bdev->irq, bdev); 532 device_init_wakeup(bdev->dev, false); 533 pm_runtime_disable(bdev->dev); 534 } 535 536 err = bcm_gpio_set_power(bdev, false); 537 if (err) 538 bt_dev_err(hu->hdev, "Failed to power down"); 539 else 540 pm_runtime_set_suspended(bdev->dev); 541 } 542 mutex_unlock(&bcm_device_lock); 543 544 skb_queue_purge(&bcm->txq); 545 kfree_skb(bcm->rx_skb); 546 kfree(bcm); 547 548 hu->priv = NULL; 549 return 0; 550 } 551 552 static int bcm_flush(struct hci_uart *hu) 553 { 554 struct bcm_data *bcm = hu->priv; 555 556 bt_dev_dbg(hu->hdev, "hu %p", hu); 557 558 skb_queue_purge(&bcm->txq); 559 560 return 0; 561 } 562 563 static int bcm_setup(struct hci_uart *hu) 564 { 565 struct bcm_data *bcm = hu->priv; 566 bool fw_load_done = false; 567 unsigned int speed; 568 int err; 569 570 bt_dev_dbg(hu->hdev, "hu %p", hu); 571 572 hu->hdev->set_diag = bcm_set_diag; 573 hu->hdev->set_bdaddr = btbcm_set_bdaddr; 574 575 err = btbcm_initialize(hu->hdev, &fw_load_done); 576 if (err) 577 return err; 578 579 if (!fw_load_done) 580 return 0; 581 582 /* Init speed if any */ 583 if (hu->init_speed) 584 speed = hu->init_speed; 585 else if (hu->proto->init_speed) 586 speed = hu->proto->init_speed; 587 else 588 speed = 0; 589 590 if (speed) 591 host_set_baudrate(hu, speed); 592 593 /* Operational speed if any */ 594 if (hu->oper_speed) 595 speed = hu->oper_speed; 596 else if (bcm->dev && bcm->dev->oper_speed) 597 speed = bcm->dev->oper_speed; 598 else if (hu->proto->oper_speed) 599 speed = hu->proto->oper_speed; 600 else 601 speed = 0; 602 603 if (speed) { 604 err = bcm_set_baudrate(hu, speed); 605 if (!err) 606 host_set_baudrate(hu, speed); 607 } 608 609 /* PCM parameters if provided */ 610 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) { 611 struct bcm_set_pcm_int_params params; 612 613 btbcm_read_pcm_int_params(hu->hdev, ¶ms); 614 615 memcpy(¶ms, bcm->dev->pcm_int_params, 5); 616 btbcm_write_pcm_int_params(hu->hdev, ¶ms); 617 } 618 619 err = btbcm_finalize(hu->hdev, &fw_load_done); 620 if (err) 621 return err; 622 623 /* Some devices ship with the controller default address. 624 * Allow the bootloader to set a valid address through the 625 * device tree. 626 */ 627 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks); 628 629 if (!bcm_request_irq(bcm)) 630 err = bcm_setup_sleep(hu); 631 632 return err; 633 } 634 635 #define BCM_RECV_LM_DIAG \ 636 .type = BCM_LM_DIAG_PKT, \ 637 .hlen = BCM_LM_DIAG_SIZE, \ 638 .loff = 0, \ 639 .lsize = 0, \ 640 .maxlen = BCM_LM_DIAG_SIZE 641 642 #define BCM_RECV_NULL \ 643 .type = BCM_NULL_PKT, \ 644 .hlen = BCM_NULL_SIZE, \ 645 .loff = 0, \ 646 .lsize = 0, \ 647 .maxlen = BCM_NULL_SIZE 648 649 #define BCM_RECV_TYPE49 \ 650 .type = BCM_TYPE49_PKT, \ 651 .hlen = BCM_TYPE49_SIZE, \ 652 .loff = 0, \ 653 .lsize = 0, \ 654 .maxlen = BCM_TYPE49_SIZE 655 656 #define BCM_RECV_TYPE52 \ 657 .type = BCM_TYPE52_PKT, \ 658 .hlen = BCM_TYPE52_SIZE, \ 659 .loff = 0, \ 660 .lsize = 0, \ 661 .maxlen = BCM_TYPE52_SIZE 662 663 static const struct h4_recv_pkt bcm_recv_pkts[] = { 664 { H4_RECV_ACL, .recv = hci_recv_frame }, 665 { H4_RECV_SCO, .recv = hci_recv_frame }, 666 { H4_RECV_EVENT, .recv = hci_recv_frame }, 667 { H4_RECV_ISO, .recv = hci_recv_frame }, 668 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, 669 { BCM_RECV_NULL, .recv = hci_recv_diag }, 670 { BCM_RECV_TYPE49, .recv = hci_recv_diag }, 671 { BCM_RECV_TYPE52, .recv = hci_recv_diag }, 672 }; 673 674 static int bcm_recv(struct hci_uart *hu, const void *data, int count) 675 { 676 struct bcm_data *bcm = hu->priv; 677 678 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 679 return -EUNATCH; 680 681 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, 682 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); 683 if (IS_ERR(bcm->rx_skb)) { 684 int err = PTR_ERR(bcm->rx_skb); 685 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 686 bcm->rx_skb = NULL; 687 return err; 688 } else if (!bcm->rx_skb) { 689 /* Delay auto-suspend when receiving completed packet */ 690 mutex_lock(&bcm_device_lock); 691 if (bcm->dev && bcm_device_exists(bcm->dev)) { 692 pm_runtime_get(bcm->dev->dev); 693 pm_runtime_mark_last_busy(bcm->dev->dev); 694 pm_runtime_put_autosuspend(bcm->dev->dev); 695 } 696 mutex_unlock(&bcm_device_lock); 697 } 698 699 return count; 700 } 701 702 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) 703 { 704 struct bcm_data *bcm = hu->priv; 705 706 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); 707 708 /* Prepend skb with frame type */ 709 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 710 skb_queue_tail(&bcm->txq, skb); 711 712 return 0; 713 } 714 715 static struct sk_buff *bcm_dequeue(struct hci_uart *hu) 716 { 717 struct bcm_data *bcm = hu->priv; 718 struct sk_buff *skb = NULL; 719 struct bcm_device *bdev = NULL; 720 721 mutex_lock(&bcm_device_lock); 722 723 if (bcm_device_exists(bcm->dev)) { 724 bdev = bcm->dev; 725 pm_runtime_get_sync(bdev->dev); 726 /* Shall be resumed here */ 727 } 728 729 skb = skb_dequeue(&bcm->txq); 730 731 if (bdev) { 732 pm_runtime_mark_last_busy(bdev->dev); 733 pm_runtime_put_autosuspend(bdev->dev); 734 } 735 736 mutex_unlock(&bcm_device_lock); 737 738 return skb; 739 } 740 741 #ifdef CONFIG_PM 742 static int bcm_suspend_device(struct device *dev) 743 { 744 struct bcm_device *bdev = dev_get_drvdata(dev); 745 int err; 746 747 bt_dev_dbg(bdev, ""); 748 749 if (!bdev->is_suspended && bdev->hu) { 750 hci_uart_set_flow_control(bdev->hu, true); 751 752 /* Once this returns, driver suspends BT via GPIO */ 753 bdev->is_suspended = true; 754 } 755 756 /* Suspend the device */ 757 err = bdev->set_device_wakeup(bdev, false); 758 if (err) { 759 if (bdev->is_suspended && bdev->hu) { 760 bdev->is_suspended = false; 761 hci_uart_set_flow_control(bdev->hu, false); 762 } 763 return -EBUSY; 764 } 765 766 bt_dev_dbg(bdev, "suspend, delaying 15 ms"); 767 msleep(15); 768 769 return 0; 770 } 771 772 static int bcm_resume_device(struct device *dev) 773 { 774 struct bcm_device *bdev = dev_get_drvdata(dev); 775 int err; 776 777 bt_dev_dbg(bdev, ""); 778 779 err = bdev->set_device_wakeup(bdev, true); 780 if (err) { 781 dev_err(dev, "Failed to power up\n"); 782 return err; 783 } 784 785 bt_dev_dbg(bdev, "resume, delaying 15 ms"); 786 msleep(15); 787 788 /* When this executes, the device has woken up already */ 789 if (bdev->is_suspended && bdev->hu) { 790 bdev->is_suspended = false; 791 792 hci_uart_set_flow_control(bdev->hu, false); 793 } 794 795 return 0; 796 } 797 #endif 798 799 #ifdef CONFIG_PM_SLEEP 800 /* suspend callback */ 801 static int bcm_suspend(struct device *dev) 802 { 803 struct bcm_device *bdev = dev_get_drvdata(dev); 804 int error; 805 806 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); 807 808 /* 809 * When used with a device instantiated as platform_device, bcm_suspend 810 * can be called at any time as long as the platform device is bound, 811 * so it should use bcm_device_lock to protect access to hci_uart 812 * and device_wake-up GPIO. 813 */ 814 mutex_lock(&bcm_device_lock); 815 816 if (!bdev->hu) 817 goto unlock; 818 819 if (pm_runtime_active(dev)) 820 bcm_suspend_device(dev); 821 822 if (device_may_wakeup(dev) && bdev->irq > 0) { 823 error = enable_irq_wake(bdev->irq); 824 if (!error) 825 bt_dev_dbg(bdev, "BCM irq: enabled"); 826 } 827 828 unlock: 829 mutex_unlock(&bcm_device_lock); 830 831 return 0; 832 } 833 834 /* resume callback */ 835 static int bcm_resume(struct device *dev) 836 { 837 struct bcm_device *bdev = dev_get_drvdata(dev); 838 int err = 0; 839 840 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); 841 842 /* 843 * When used with a device instantiated as platform_device, bcm_resume 844 * can be called at any time as long as platform device is bound, 845 * so it should use bcm_device_lock to protect access to hci_uart 846 * and device_wake-up GPIO. 847 */ 848 mutex_lock(&bcm_device_lock); 849 850 if (!bdev->hu) 851 goto unlock; 852 853 if (device_may_wakeup(dev) && bdev->irq > 0) { 854 disable_irq_wake(bdev->irq); 855 bt_dev_dbg(bdev, "BCM irq: disabled"); 856 } 857 858 err = bcm_resume_device(dev); 859 860 unlock: 861 mutex_unlock(&bcm_device_lock); 862 863 if (!err) { 864 pm_runtime_disable(dev); 865 pm_runtime_set_active(dev); 866 pm_runtime_enable(dev); 867 } 868 869 return 0; 870 } 871 #endif 872 873 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ 874 static struct gpiod_lookup_table asus_tf103c_irq_gpios = { 875 .dev_id = "serial0-0", 876 .table = { 877 GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH), 878 { } 879 }, 880 }; 881 882 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { 883 { 884 .ident = "Asus TF103C", 885 .matches = { 886 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 887 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), 888 }, 889 .driver_data = &asus_tf103c_irq_gpios, 890 }, 891 { 892 .ident = "Meegopad T08", 893 .matches = { 894 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, 895 "To be filled by OEM."), 896 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), 897 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), 898 }, 899 }, 900 { } 901 }; 902 903 #ifdef CONFIG_ACPI 904 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 905 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 906 static const struct acpi_gpio_params third_gpio = { 2, 0, false }; 907 908 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { 909 { "device-wakeup-gpios", &first_gpio, 1 }, 910 { "shutdown-gpios", &second_gpio, 1 }, 911 { "host-wakeup-gpios", &third_gpio, 1 }, 912 { }, 913 }; 914 915 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { 916 { "host-wakeup-gpios", &first_gpio, 1 }, 917 { "device-wakeup-gpios", &second_gpio, 1 }, 918 { "shutdown-gpios", &third_gpio, 1 }, 919 { }, 920 }; 921 922 static int bcm_resource(struct acpi_resource *ares, void *data) 923 { 924 struct bcm_device *dev = data; 925 struct acpi_resource_extended_irq *irq; 926 struct acpi_resource_gpio *gpio; 927 struct acpi_resource_uart_serialbus *sb; 928 929 switch (ares->type) { 930 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 931 irq = &ares->data.extended_irq; 932 if (irq->polarity != ACPI_ACTIVE_LOW) 933 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); 934 dev->irq_active_low = true; 935 break; 936 937 case ACPI_RESOURCE_TYPE_GPIO: 938 gpio = &ares->data.gpio; 939 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 940 dev->gpio_int_idx = dev->gpio_count; 941 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; 942 } 943 dev->gpio_count++; 944 break; 945 946 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 947 sb = &ares->data.uart_serial_bus; 948 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { 949 dev->init_speed = sb->default_baud_rate; 950 dev->oper_speed = 4000000; 951 } 952 break; 953 954 default: 955 break; 956 } 957 958 return 0; 959 } 960 961 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) 962 { 963 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) 964 return -EIO; 965 966 return 0; 967 } 968 969 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) 970 { 971 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, 972 NULL, NULL, NULL))) 973 return -EIO; 974 975 return 0; 976 } 977 978 static int bcm_apple_get_resources(struct bcm_device *dev) 979 { 980 struct acpi_device *adev = ACPI_COMPANION(dev->dev); 981 const union acpi_object *obj; 982 983 if (!adev || 984 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || 985 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || 986 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) 987 return -ENODEV; 988 989 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && 990 obj->buffer.length == 8) 991 dev->init_speed = *(u64 *)obj->buffer.pointer; 992 993 dev->set_device_wakeup = bcm_apple_set_device_wakeup; 994 dev->set_shutdown = bcm_apple_set_shutdown; 995 996 return 0; 997 } 998 #else 999 static inline int bcm_apple_get_resources(struct bcm_device *dev) 1000 { 1001 return -EOPNOTSUPP; 1002 } 1003 #endif /* CONFIG_ACPI */ 1004 1005 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) 1006 { 1007 gpiod_set_value_cansleep(dev->device_wakeup, awake); 1008 return 0; 1009 } 1010 1011 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) 1012 { 1013 gpiod_set_value_cansleep(dev->shutdown, powered); 1014 if (dev->reset) 1015 /* 1016 * The reset line is asserted on powerdown and deasserted 1017 * on poweron so the inverse of powered is used. Notice 1018 * that the GPIO line BT_RST_N needs to be specified as 1019 * active low in the device tree or similar system 1020 * description. 1021 */ 1022 gpiod_set_value_cansleep(dev->reset, !powered); 1023 return 0; 1024 } 1025 1026 /* Try a bunch of names for TXCO */ 1027 static struct clk *bcm_get_txco(struct device *dev) 1028 { 1029 struct clk *clk; 1030 1031 /* New explicit name */ 1032 clk = devm_clk_get(dev, "txco"); 1033 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1034 return clk; 1035 1036 /* Deprecated name */ 1037 clk = devm_clk_get(dev, "extclk"); 1038 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1039 return clk; 1040 1041 /* Original code used no name at all */ 1042 return devm_clk_get(dev, NULL); 1043 } 1044 1045 static int bcm_get_resources(struct bcm_device *dev) 1046 { 1047 const struct dmi_system_id *broken_irq_dmi_id; 1048 const char *irq_con_id = "host-wakeup"; 1049 int err; 1050 1051 dev->name = dev_name(dev->dev); 1052 1053 if (x86_apple_machine && !bcm_apple_get_resources(dev)) 1054 return 0; 1055 1056 dev->txco_clk = bcm_get_txco(dev->dev); 1057 1058 /* Handle deferred probing */ 1059 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) 1060 return PTR_ERR(dev->txco_clk); 1061 1062 /* Ignore all other errors as before */ 1063 if (IS_ERR(dev->txco_clk)) 1064 dev->txco_clk = NULL; 1065 1066 dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); 1067 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) 1068 return PTR_ERR(dev->lpo_clk); 1069 1070 if (IS_ERR(dev->lpo_clk)) 1071 dev->lpo_clk = NULL; 1072 1073 /* Check if we accidentally fetched the lpo clock twice */ 1074 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { 1075 devm_clk_put(dev->dev, dev->txco_clk); 1076 dev->txco_clk = NULL; 1077 } 1078 1079 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", 1080 GPIOD_OUT_LOW); 1081 if (IS_ERR(dev->device_wakeup)) 1082 return PTR_ERR(dev->device_wakeup); 1083 1084 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", 1085 GPIOD_OUT_LOW); 1086 if (IS_ERR(dev->shutdown)) 1087 return PTR_ERR(dev->shutdown); 1088 1089 dev->reset = devm_gpiod_get_optional(dev->dev, "reset", 1090 GPIOD_OUT_LOW); 1091 if (IS_ERR(dev->reset)) 1092 return PTR_ERR(dev->reset); 1093 1094 dev->set_device_wakeup = bcm_gpio_set_device_wakeup; 1095 dev->set_shutdown = bcm_gpio_set_shutdown; 1096 1097 dev->supplies[0].supply = "vbat"; 1098 dev->supplies[1].supply = "vddio"; 1099 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, 1100 dev->supplies); 1101 if (err) 1102 return err; 1103 1104 broken_irq_dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); 1105 if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) { 1106 gpiod_add_lookup_table(broken_irq_dmi_id->driver_data); 1107 irq_con_id = "host-wakeup-alt"; 1108 dev->irq_active_low = false; 1109 dev->irq = 0; 1110 } 1111 1112 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ 1113 if (dev->irq <= 0) { 1114 struct gpio_desc *gpio; 1115 1116 gpio = devm_gpiod_get_optional(dev->dev, irq_con_id, GPIOD_IN); 1117 if (IS_ERR(gpio)) 1118 return PTR_ERR(gpio); 1119 1120 dev->irq = gpiod_to_irq(gpio); 1121 } 1122 1123 if (broken_irq_dmi_id) { 1124 if (broken_irq_dmi_id->driver_data) { 1125 gpiod_remove_lookup_table(broken_irq_dmi_id->driver_data); 1126 } else { 1127 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", 1128 broken_irq_dmi_id->ident); 1129 dev->irq = 0; 1130 } 1131 } 1132 1133 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); 1134 return 0; 1135 } 1136 1137 #ifdef CONFIG_ACPI 1138 static int bcm_acpi_probe(struct bcm_device *dev) 1139 { 1140 LIST_HEAD(resources); 1141 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; 1142 struct resource_entry *entry; 1143 int ret; 1144 1145 /* Retrieve UART ACPI info */ 1146 dev->gpio_int_idx = -1; 1147 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), 1148 &resources, bcm_resource, dev); 1149 if (ret < 0) 1150 return ret; 1151 1152 resource_list_for_each_entry(entry, &resources) { 1153 if (resource_type(entry->res) == IORESOURCE_IRQ) { 1154 dev->irq = entry->res->start; 1155 break; 1156 } 1157 } 1158 acpi_dev_free_resource_list(&resources); 1159 1160 /* If the DSDT uses an Interrupt resource for the IRQ, then there are 1161 * only 2 GPIO resources, we use the irq-last mapping for this, since 1162 * we already have an irq the 3th / last mapping will not be used. 1163 */ 1164 if (dev->irq) 1165 gpio_mapping = acpi_bcm_int_last_gpios; 1166 else if (dev->gpio_int_idx == 0) 1167 gpio_mapping = acpi_bcm_int_first_gpios; 1168 else if (dev->gpio_int_idx == 2) 1169 gpio_mapping = acpi_bcm_int_last_gpios; 1170 else 1171 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", 1172 dev->gpio_int_idx); 1173 1174 /* Warn if our expectations are not met. */ 1175 if (dev->gpio_count != (dev->irq ? 2 : 3)) 1176 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", 1177 dev->gpio_count); 1178 1179 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); 1180 if (ret) 1181 return ret; 1182 1183 if (irq_polarity != -1) { 1184 dev->irq_active_low = irq_polarity; 1185 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", 1186 dev->irq_active_low ? "low" : "high"); 1187 } 1188 1189 return 0; 1190 } 1191 #else 1192 static int bcm_acpi_probe(struct bcm_device *dev) 1193 { 1194 return -EINVAL; 1195 } 1196 #endif /* CONFIG_ACPI */ 1197 1198 static int bcm_of_probe(struct bcm_device *bdev) 1199 { 1200 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); 1201 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params", 1202 bdev->pcm_int_params, 5); 1203 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup"); 1204 bdev->irq_active_low = irq_get_trigger_type(bdev->irq) 1205 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW); 1206 return 0; 1207 } 1208 1209 static int bcm_probe(struct platform_device *pdev) 1210 { 1211 struct bcm_device *dev; 1212 int ret; 1213 1214 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 1215 if (!dev) 1216 return -ENOMEM; 1217 1218 dev->dev = &pdev->dev; 1219 1220 ret = platform_get_irq(pdev, 0); 1221 if (ret < 0) 1222 return ret; 1223 1224 dev->irq = ret; 1225 1226 /* Initialize routing field to an unused value */ 1227 dev->pcm_int_params[0] = 0xff; 1228 1229 if (has_acpi_companion(&pdev->dev)) { 1230 ret = bcm_acpi_probe(dev); 1231 if (ret) 1232 return ret; 1233 } 1234 1235 ret = bcm_get_resources(dev); 1236 if (ret) 1237 return ret; 1238 1239 platform_set_drvdata(pdev, dev); 1240 1241 dev_info(&pdev->dev, "%s device registered.\n", dev->name); 1242 1243 /* Place this instance on the device list */ 1244 mutex_lock(&bcm_device_lock); 1245 list_add_tail(&dev->list, &bcm_device_list); 1246 mutex_unlock(&bcm_device_lock); 1247 1248 ret = bcm_gpio_set_power(dev, false); 1249 if (ret) 1250 dev_err(&pdev->dev, "Failed to power down\n"); 1251 1252 return 0; 1253 } 1254 1255 static int bcm_remove(struct platform_device *pdev) 1256 { 1257 struct bcm_device *dev = platform_get_drvdata(pdev); 1258 1259 mutex_lock(&bcm_device_lock); 1260 list_del(&dev->list); 1261 mutex_unlock(&bcm_device_lock); 1262 1263 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); 1264 1265 return 0; 1266 } 1267 1268 static const struct hci_uart_proto bcm_proto = { 1269 .id = HCI_UART_BCM, 1270 .name = "Broadcom", 1271 .manufacturer = 15, 1272 .init_speed = 115200, 1273 .open = bcm_open, 1274 .close = bcm_close, 1275 .flush = bcm_flush, 1276 .setup = bcm_setup, 1277 .set_baudrate = bcm_set_baudrate, 1278 .recv = bcm_recv, 1279 .enqueue = bcm_enqueue, 1280 .dequeue = bcm_dequeue, 1281 }; 1282 1283 #ifdef CONFIG_ACPI 1284 static const struct acpi_device_id bcm_acpi_match[] = { 1285 { "BCM2E00" }, 1286 { "BCM2E01" }, 1287 { "BCM2E02" }, 1288 { "BCM2E03" }, 1289 { "BCM2E04" }, 1290 { "BCM2E05" }, 1291 { "BCM2E06" }, 1292 { "BCM2E07" }, 1293 { "BCM2E08" }, 1294 { "BCM2E09" }, 1295 { "BCM2E0A" }, 1296 { "BCM2E0B" }, 1297 { "BCM2E0C" }, 1298 { "BCM2E0D" }, 1299 { "BCM2E0E" }, 1300 { "BCM2E0F" }, 1301 { "BCM2E10" }, 1302 { "BCM2E11" }, 1303 { "BCM2E12" }, 1304 { "BCM2E13" }, 1305 { "BCM2E14" }, 1306 { "BCM2E15" }, 1307 { "BCM2E16" }, 1308 { "BCM2E17" }, 1309 { "BCM2E18" }, 1310 { "BCM2E19" }, 1311 { "BCM2E1A" }, 1312 { "BCM2E1B" }, 1313 { "BCM2E1C" }, 1314 { "BCM2E1D" }, 1315 { "BCM2E1F" }, 1316 { "BCM2E20" }, 1317 { "BCM2E21" }, 1318 { "BCM2E22" }, 1319 { "BCM2E23" }, 1320 { "BCM2E24" }, 1321 { "BCM2E25" }, 1322 { "BCM2E26" }, 1323 { "BCM2E27" }, 1324 { "BCM2E28" }, 1325 { "BCM2E29" }, 1326 { "BCM2E2A" }, 1327 { "BCM2E2B" }, 1328 { "BCM2E2C" }, 1329 { "BCM2E2D" }, 1330 { "BCM2E2E" }, 1331 { "BCM2E2F" }, 1332 { "BCM2E30" }, 1333 { "BCM2E31" }, 1334 { "BCM2E32" }, 1335 { "BCM2E33" }, 1336 { "BCM2E34" }, 1337 { "BCM2E35" }, 1338 { "BCM2E36" }, 1339 { "BCM2E37" }, 1340 { "BCM2E38" }, 1341 { "BCM2E39" }, 1342 { "BCM2E3A" }, 1343 { "BCM2E3B" }, 1344 { "BCM2E3C" }, 1345 { "BCM2E3D" }, 1346 { "BCM2E3E" }, 1347 { "BCM2E3F" }, 1348 { "BCM2E40" }, 1349 { "BCM2E41" }, 1350 { "BCM2E42" }, 1351 { "BCM2E43" }, 1352 { "BCM2E44" }, 1353 { "BCM2E45" }, 1354 { "BCM2E46" }, 1355 { "BCM2E47" }, 1356 { "BCM2E48" }, 1357 { "BCM2E49" }, 1358 { "BCM2E4A" }, 1359 { "BCM2E4B" }, 1360 { "BCM2E4C" }, 1361 { "BCM2E4D" }, 1362 { "BCM2E4E" }, 1363 { "BCM2E4F" }, 1364 { "BCM2E50" }, 1365 { "BCM2E51" }, 1366 { "BCM2E52" }, 1367 { "BCM2E53" }, 1368 { "BCM2E54" }, 1369 { "BCM2E55" }, 1370 { "BCM2E56" }, 1371 { "BCM2E57" }, 1372 { "BCM2E58" }, 1373 { "BCM2E59" }, 1374 { "BCM2E5A" }, 1375 { "BCM2E5B" }, 1376 { "BCM2E5C" }, 1377 { "BCM2E5D" }, 1378 { "BCM2E5E" }, 1379 { "BCM2E5F" }, 1380 { "BCM2E60" }, 1381 { "BCM2E61" }, 1382 { "BCM2E62" }, 1383 { "BCM2E63" }, 1384 { "BCM2E64" }, 1385 { "BCM2E65" }, 1386 { "BCM2E66" }, 1387 { "BCM2E67" }, 1388 { "BCM2E68" }, 1389 { "BCM2E69" }, 1390 { "BCM2E6B" }, 1391 { "BCM2E6D" }, 1392 { "BCM2E6E" }, 1393 { "BCM2E6F" }, 1394 { "BCM2E70" }, 1395 { "BCM2E71" }, 1396 { "BCM2E72" }, 1397 { "BCM2E73" }, 1398 { "BCM2E74" }, 1399 { "BCM2E75" }, 1400 { "BCM2E76" }, 1401 { "BCM2E77" }, 1402 { "BCM2E78" }, 1403 { "BCM2E79" }, 1404 { "BCM2E7A" }, 1405 { "BCM2E7B" }, 1406 { "BCM2E7C" }, 1407 { "BCM2E7D" }, 1408 { "BCM2E7E" }, 1409 { "BCM2E7F" }, 1410 { "BCM2E80" }, 1411 { "BCM2E81" }, 1412 { "BCM2E82" }, 1413 { "BCM2E83" }, 1414 { "BCM2E84" }, 1415 { "BCM2E85" }, 1416 { "BCM2E86" }, 1417 { "BCM2E87" }, 1418 { "BCM2E88" }, 1419 { "BCM2E89" }, 1420 { "BCM2E8A" }, 1421 { "BCM2E8B" }, 1422 { "BCM2E8C" }, 1423 { "BCM2E8D" }, 1424 { "BCM2E8E" }, 1425 { "BCM2E90" }, 1426 { "BCM2E92" }, 1427 { "BCM2E93" }, 1428 { "BCM2E94" }, 1429 { "BCM2E95" }, 1430 { "BCM2E96" }, 1431 { "BCM2E97" }, 1432 { "BCM2E98" }, 1433 { "BCM2E99" }, 1434 { "BCM2E9A" }, 1435 { "BCM2E9B" }, 1436 { "BCM2E9C" }, 1437 { "BCM2E9D" }, 1438 { "BCM2EA0" }, 1439 { "BCM2EA1" }, 1440 { "BCM2EA2" }, 1441 { "BCM2EA3" }, 1442 { "BCM2EA4" }, 1443 { "BCM2EA5" }, 1444 { "BCM2EA6" }, 1445 { "BCM2EA7" }, 1446 { "BCM2EA8" }, 1447 { "BCM2EA9" }, 1448 { "BCM2EAA" }, 1449 { "BCM2EAB" }, 1450 { "BCM2EAC" }, 1451 { }, 1452 }; 1453 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); 1454 #endif 1455 1456 /* suspend and resume callbacks */ 1457 static const struct dev_pm_ops bcm_pm_ops = { 1458 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) 1459 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) 1460 }; 1461 1462 static struct platform_driver bcm_driver = { 1463 .probe = bcm_probe, 1464 .remove = bcm_remove, 1465 .driver = { 1466 .name = "hci_bcm", 1467 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1468 .pm = &bcm_pm_ops, 1469 }, 1470 }; 1471 1472 static int bcm_serdev_probe(struct serdev_device *serdev) 1473 { 1474 struct bcm_device *bcmdev; 1475 const struct bcm_device_data *data; 1476 int err; 1477 1478 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); 1479 if (!bcmdev) 1480 return -ENOMEM; 1481 1482 bcmdev->dev = &serdev->dev; 1483 #ifdef CONFIG_PM 1484 bcmdev->hu = &bcmdev->serdev_hu; 1485 #endif 1486 bcmdev->serdev_hu.serdev = serdev; 1487 serdev_device_set_drvdata(serdev, bcmdev); 1488 1489 /* Initialize routing field to an unused value */ 1490 bcmdev->pcm_int_params[0] = 0xff; 1491 1492 if (has_acpi_companion(&serdev->dev)) 1493 err = bcm_acpi_probe(bcmdev); 1494 else 1495 err = bcm_of_probe(bcmdev); 1496 if (err) 1497 return err; 1498 1499 err = bcm_get_resources(bcmdev); 1500 if (err) 1501 return err; 1502 1503 if (!bcmdev->shutdown) { 1504 dev_warn(&serdev->dev, 1505 "No reset resource, using default baud rate\n"); 1506 bcmdev->oper_speed = bcmdev->init_speed; 1507 } 1508 1509 err = bcm_gpio_set_power(bcmdev, false); 1510 if (err) 1511 dev_err(&serdev->dev, "Failed to power down\n"); 1512 1513 data = device_get_match_data(bcmdev->dev); 1514 if (data) { 1515 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; 1516 bcmdev->drive_rts_on_open = data->drive_rts_on_open; 1517 } 1518 1519 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); 1520 } 1521 1522 static void bcm_serdev_remove(struct serdev_device *serdev) 1523 { 1524 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); 1525 1526 hci_uart_unregister_device(&bcmdev->serdev_hu); 1527 } 1528 1529 #ifdef CONFIG_OF 1530 static struct bcm_device_data bcm4354_device_data = { 1531 .no_early_set_baudrate = true, 1532 }; 1533 1534 static struct bcm_device_data bcm43438_device_data = { 1535 .drive_rts_on_open = true, 1536 }; 1537 1538 static const struct of_device_id bcm_bluetooth_of_match[] = { 1539 { .compatible = "brcm,bcm20702a1" }, 1540 { .compatible = "brcm,bcm4329-bt" }, 1541 { .compatible = "brcm,bcm4330-bt" }, 1542 { .compatible = "brcm,bcm4334-bt" }, 1543 { .compatible = "brcm,bcm4345c5" }, 1544 { .compatible = "brcm,bcm43430a0-bt" }, 1545 { .compatible = "brcm,bcm43430a1-bt" }, 1546 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, 1547 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, 1548 { .compatible = "brcm,bcm4335a0" }, 1549 { }, 1550 }; 1551 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); 1552 #endif 1553 1554 static struct serdev_device_driver bcm_serdev_driver = { 1555 .probe = bcm_serdev_probe, 1556 .remove = bcm_serdev_remove, 1557 .driver = { 1558 .name = "hci_uart_bcm", 1559 .of_match_table = of_match_ptr(bcm_bluetooth_of_match), 1560 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1561 .pm = &bcm_pm_ops, 1562 }, 1563 }; 1564 1565 int __init bcm_init(void) 1566 { 1567 /* For now, we need to keep both platform device 1568 * driver (ACPI generated) and serdev driver (DT). 1569 */ 1570 platform_driver_register(&bcm_driver); 1571 serdev_device_driver_register(&bcm_serdev_driver); 1572 1573 return hci_uart_register_proto(&bcm_proto); 1574 } 1575 1576 int __exit bcm_deinit(void) 1577 { 1578 platform_driver_unregister(&bcm_driver); 1579 serdev_device_driver_unregister(&bcm_serdev_driver); 1580 1581 return hci_uart_unregister_proto(&bcm_proto); 1582 } 1583