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