1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 4 * Bluetooth HCI UART driver for Broadcom devices 5 * 6 * Copyright (C) 2015 Intel Corporation 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/errno.h> 11 #include <linux/skbuff.h> 12 #include <linux/firmware.h> 13 #include <linux/module.h> 14 #include <linux/acpi.h> 15 #include <linux/of.h> 16 #include <linux/of_irq.h> 17 #include <linux/property.h> 18 #include <linux/platform_data/x86/apple.h> 19 #include <linux/platform_device.h> 20 #include <linux/regulator/consumer.h> 21 #include <linux/clk.h> 22 #include <linux/gpio/consumer.h> 23 #include <linux/tty.h> 24 #include <linux/interrupt.h> 25 #include <linux/dmi.h> 26 #include <linux/pm_runtime.h> 27 #include <linux/serdev.h> 28 29 #include <net/bluetooth/bluetooth.h> 30 #include <net/bluetooth/hci_core.h> 31 32 #include "btbcm.h" 33 #include "hci_uart.h" 34 35 #define BCM_NULL_PKT 0x00 36 #define BCM_NULL_SIZE 0 37 38 #define BCM_LM_DIAG_PKT 0x07 39 #define BCM_LM_DIAG_SIZE 63 40 41 #define BCM_TYPE49_PKT 0x31 42 #define BCM_TYPE49_SIZE 0 43 44 #define BCM_TYPE52_PKT 0x34 45 #define BCM_TYPE52_SIZE 0 46 47 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ 48 49 #define BCM_NUM_SUPPLIES 2 50 51 /** 52 * struct bcm_device_data - device specific data 53 * @no_early_set_baudrate: Disallow set baudrate before driver setup() 54 */ 55 struct bcm_device_data { 56 bool no_early_set_baudrate; 57 bool drive_rts_on_open; 58 }; 59 60 /** 61 * struct bcm_device - device driver resources 62 * @serdev_hu: HCI UART controller struct 63 * @list: bcm_device_list node 64 * @dev: physical UART slave 65 * @name: device name logged by bt_dev_*() functions 66 * @device_wakeup: BT_WAKE pin, 67 * assert = Bluetooth device must wake up or remain awake, 68 * deassert = Bluetooth device may sleep when sleep criteria are met 69 * @shutdown: BT_REG_ON pin, 70 * power up or power down Bluetooth device internal regulators 71 * @set_device_wakeup: callback to toggle BT_WAKE pin 72 * either by accessing @device_wakeup or by calling @btlp 73 * @set_shutdown: callback to toggle BT_REG_ON pin 74 * either by accessing @shutdown or by calling @btpu/@btpd 75 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") 76 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") 77 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") 78 * @txco_clk: external reference frequency clock used by Bluetooth device 79 * @lpo_clk: external LPO clock used by Bluetooth device 80 * @supplies: VBAT and VDDIO supplies used by Bluetooth device 81 * @res_enabled: whether clocks and supplies are prepared and enabled 82 * @init_speed: default baudrate of Bluetooth device; 83 * the host UART is initially set to this baudrate so that 84 * it can configure the Bluetooth device for @oper_speed 85 * @oper_speed: preferred baudrate of Bluetooth device; 86 * set to 0 if @init_speed is already the preferred baudrate 87 * @irq: interrupt triggered by HOST_WAKE_BT pin 88 * @irq_active_low: whether @irq is active low 89 * @hu: pointer to HCI UART controller struct, 90 * used to disable flow control during runtime suspend and system sleep 91 * @is_suspended: whether flow control is currently disabled 92 * @no_early_set_baudrate: don't set_baudrate before setup() 93 */ 94 struct bcm_device { 95 /* Must be the first member, hci_serdev.c expects this. */ 96 struct hci_uart serdev_hu; 97 struct list_head list; 98 99 struct device *dev; 100 101 const char *name; 102 struct gpio_desc *device_wakeup; 103 struct gpio_desc *shutdown; 104 int (*set_device_wakeup)(struct bcm_device *, bool); 105 int (*set_shutdown)(struct bcm_device *, bool); 106 #ifdef CONFIG_ACPI 107 acpi_handle btlp, btpu, btpd; 108 int gpio_count; 109 int gpio_int_idx; 110 #endif 111 112 struct clk *txco_clk; 113 struct clk *lpo_clk; 114 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; 115 bool res_enabled; 116 117 u32 init_speed; 118 u32 oper_speed; 119 int irq; 120 bool irq_active_low; 121 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 */ 133 struct 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 */ 141 static DEFINE_MUTEX(bcm_device_lock); 142 static LIST_HEAD(bcm_device_list); 143 144 static int irq_polarity = -1; 145 module_param(irq_polarity, int, 0444); 146 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); 147 148 static 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 } 155 156 static 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 */ 206 static 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 } 225 226 static 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; 283 284 err_revert_shutdown: 285 dev->set_shutdown(dev, !powered); 286 err_txco_clk_disable: 287 if (powered && !dev->res_enabled) 288 clk_disable_unprepare(dev->txco_clk); 289 err_lpo_clk_disable: 290 if (powered && !dev->res_enabled) 291 clk_disable_unprepare(dev->lpo_clk); 292 err_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 299 static 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 } 311 312 static 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); 346 347 unlock: 348 mutex_unlock(&bcm_device_lock); 349 350 return err; 351 } 352 353 static 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 }; 368 369 static 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 391 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } 392 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } 393 #endif 394 395 static 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 } 417 418 static 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 } 462 463 out: 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; 487 488 err_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 } 498 499 static 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 } 541 542 static 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 } 552 553 static 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 652 653 static 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 { H4_RECV_ISO, .recv = hci_recv_frame }, 658 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, 659 { BCM_RECV_NULL, .recv = hci_recv_diag }, 660 { BCM_RECV_TYPE49, .recv = hci_recv_diag }, 661 { BCM_RECV_TYPE52, .recv = hci_recv_diag }, 662 }; 663 664 static int bcm_recv(struct hci_uart *hu, const void *data, int count) 665 { 666 struct bcm_data *bcm = hu->priv; 667 668 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 669 return -EUNATCH; 670 671 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, 672 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); 673 if (IS_ERR(bcm->rx_skb)) { 674 int err = PTR_ERR(bcm->rx_skb); 675 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 676 bcm->rx_skb = NULL; 677 return err; 678 } else if (!bcm->rx_skb) { 679 /* Delay auto-suspend when receiving completed packet */ 680 mutex_lock(&bcm_device_lock); 681 if (bcm->dev && bcm_device_exists(bcm->dev)) { 682 pm_runtime_get(bcm->dev->dev); 683 pm_runtime_mark_last_busy(bcm->dev->dev); 684 pm_runtime_put_autosuspend(bcm->dev->dev); 685 } 686 mutex_unlock(&bcm_device_lock); 687 } 688 689 return count; 690 } 691 692 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) 693 { 694 struct bcm_data *bcm = hu->priv; 695 696 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); 697 698 /* Prepend skb with frame type */ 699 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 700 skb_queue_tail(&bcm->txq, skb); 701 702 return 0; 703 } 704 705 static struct sk_buff *bcm_dequeue(struct hci_uart *hu) 706 { 707 struct bcm_data *bcm = hu->priv; 708 struct sk_buff *skb = NULL; 709 struct bcm_device *bdev = NULL; 710 711 mutex_lock(&bcm_device_lock); 712 713 if (bcm_device_exists(bcm->dev)) { 714 bdev = bcm->dev; 715 pm_runtime_get_sync(bdev->dev); 716 /* Shall be resumed here */ 717 } 718 719 skb = skb_dequeue(&bcm->txq); 720 721 if (bdev) { 722 pm_runtime_mark_last_busy(bdev->dev); 723 pm_runtime_put_autosuspend(bdev->dev); 724 } 725 726 mutex_unlock(&bcm_device_lock); 727 728 return skb; 729 } 730 731 #ifdef CONFIG_PM 732 static int bcm_suspend_device(struct device *dev) 733 { 734 struct bcm_device *bdev = dev_get_drvdata(dev); 735 int err; 736 737 bt_dev_dbg(bdev, ""); 738 739 if (!bdev->is_suspended && bdev->hu) { 740 hci_uart_set_flow_control(bdev->hu, true); 741 742 /* Once this returns, driver suspends BT via GPIO */ 743 bdev->is_suspended = true; 744 } 745 746 /* Suspend the device */ 747 err = bdev->set_device_wakeup(bdev, false); 748 if (err) { 749 if (bdev->is_suspended && bdev->hu) { 750 bdev->is_suspended = false; 751 hci_uart_set_flow_control(bdev->hu, false); 752 } 753 return -EBUSY; 754 } 755 756 bt_dev_dbg(bdev, "suspend, delaying 15 ms"); 757 msleep(15); 758 759 return 0; 760 } 761 762 static int bcm_resume_device(struct device *dev) 763 { 764 struct bcm_device *bdev = dev_get_drvdata(dev); 765 int err; 766 767 bt_dev_dbg(bdev, ""); 768 769 err = bdev->set_device_wakeup(bdev, true); 770 if (err) { 771 dev_err(dev, "Failed to power up\n"); 772 return err; 773 } 774 775 bt_dev_dbg(bdev, "resume, delaying 15 ms"); 776 msleep(15); 777 778 /* When this executes, the device has woken up already */ 779 if (bdev->is_suspended && bdev->hu) { 780 bdev->is_suspended = false; 781 782 hci_uart_set_flow_control(bdev->hu, false); 783 } 784 785 return 0; 786 } 787 #endif 788 789 #ifdef CONFIG_PM_SLEEP 790 /* suspend callback */ 791 static int bcm_suspend(struct device *dev) 792 { 793 struct bcm_device *bdev = dev_get_drvdata(dev); 794 int error; 795 796 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); 797 798 /* 799 * When used with a device instantiated as platform_device, bcm_suspend 800 * can be called at any time as long as the platform device is bound, 801 * so it should use bcm_device_lock to protect access to hci_uart 802 * and device_wake-up GPIO. 803 */ 804 mutex_lock(&bcm_device_lock); 805 806 if (!bdev->hu) 807 goto unlock; 808 809 if (pm_runtime_active(dev)) 810 bcm_suspend_device(dev); 811 812 if (device_may_wakeup(dev) && bdev->irq > 0) { 813 error = enable_irq_wake(bdev->irq); 814 if (!error) 815 bt_dev_dbg(bdev, "BCM irq: enabled"); 816 } 817 818 unlock: 819 mutex_unlock(&bcm_device_lock); 820 821 return 0; 822 } 823 824 /* resume callback */ 825 static int bcm_resume(struct device *dev) 826 { 827 struct bcm_device *bdev = dev_get_drvdata(dev); 828 int err = 0; 829 830 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); 831 832 /* 833 * When used with a device instantiated as platform_device, bcm_resume 834 * can be called at any time as long as platform device is bound, 835 * so it should use bcm_device_lock to protect access to hci_uart 836 * and device_wake-up GPIO. 837 */ 838 mutex_lock(&bcm_device_lock); 839 840 if (!bdev->hu) 841 goto unlock; 842 843 if (device_may_wakeup(dev) && bdev->irq > 0) { 844 disable_irq_wake(bdev->irq); 845 bt_dev_dbg(bdev, "BCM irq: disabled"); 846 } 847 848 err = bcm_resume_device(dev); 849 850 unlock: 851 mutex_unlock(&bcm_device_lock); 852 853 if (!err) { 854 pm_runtime_disable(dev); 855 pm_runtime_set_active(dev); 856 pm_runtime_enable(dev); 857 } 858 859 return 0; 860 } 861 #endif 862 863 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ 864 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { 865 { 866 .ident = "Meegopad T08", 867 .matches = { 868 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, 869 "To be filled by OEM."), 870 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), 871 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), 872 }, 873 }, 874 { } 875 }; 876 877 #ifdef CONFIG_ACPI 878 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 879 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 880 static const struct acpi_gpio_params third_gpio = { 2, 0, false }; 881 882 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { 883 { "device-wakeup-gpios", &first_gpio, 1 }, 884 { "shutdown-gpios", &second_gpio, 1 }, 885 { "host-wakeup-gpios", &third_gpio, 1 }, 886 { }, 887 }; 888 889 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { 890 { "host-wakeup-gpios", &first_gpio, 1 }, 891 { "device-wakeup-gpios", &second_gpio, 1 }, 892 { "shutdown-gpios", &third_gpio, 1 }, 893 { }, 894 }; 895 896 static int bcm_resource(struct acpi_resource *ares, void *data) 897 { 898 struct bcm_device *dev = data; 899 struct acpi_resource_extended_irq *irq; 900 struct acpi_resource_gpio *gpio; 901 struct acpi_resource_uart_serialbus *sb; 902 903 switch (ares->type) { 904 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 905 irq = &ares->data.extended_irq; 906 if (irq->polarity != ACPI_ACTIVE_LOW) 907 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); 908 dev->irq_active_low = true; 909 break; 910 911 case ACPI_RESOURCE_TYPE_GPIO: 912 gpio = &ares->data.gpio; 913 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 914 dev->gpio_int_idx = dev->gpio_count; 915 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; 916 } 917 dev->gpio_count++; 918 break; 919 920 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 921 sb = &ares->data.uart_serial_bus; 922 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { 923 dev->init_speed = sb->default_baud_rate; 924 dev->oper_speed = 4000000; 925 } 926 break; 927 928 default: 929 break; 930 } 931 932 return 0; 933 } 934 935 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) 936 { 937 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) 938 return -EIO; 939 940 return 0; 941 } 942 943 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) 944 { 945 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, 946 NULL, NULL, NULL))) 947 return -EIO; 948 949 return 0; 950 } 951 952 static int bcm_apple_get_resources(struct bcm_device *dev) 953 { 954 struct acpi_device *adev = ACPI_COMPANION(dev->dev); 955 const union acpi_object *obj; 956 957 if (!adev || 958 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || 959 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || 960 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) 961 return -ENODEV; 962 963 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && 964 obj->buffer.length == 8) 965 dev->init_speed = *(u64 *)obj->buffer.pointer; 966 967 dev->set_device_wakeup = bcm_apple_set_device_wakeup; 968 dev->set_shutdown = bcm_apple_set_shutdown; 969 970 return 0; 971 } 972 #else 973 static inline int bcm_apple_get_resources(struct bcm_device *dev) 974 { 975 return -EOPNOTSUPP; 976 } 977 #endif /* CONFIG_ACPI */ 978 979 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) 980 { 981 gpiod_set_value_cansleep(dev->device_wakeup, awake); 982 return 0; 983 } 984 985 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) 986 { 987 gpiod_set_value_cansleep(dev->shutdown, powered); 988 return 0; 989 } 990 991 /* Try a bunch of names for TXCO */ 992 static struct clk *bcm_get_txco(struct device *dev) 993 { 994 struct clk *clk; 995 996 /* New explicit name */ 997 clk = devm_clk_get(dev, "txco"); 998 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 999 return clk; 1000 1001 /* Deprecated name */ 1002 clk = devm_clk_get(dev, "extclk"); 1003 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1004 return clk; 1005 1006 /* Original code used no name at all */ 1007 return devm_clk_get(dev, NULL); 1008 } 1009 1010 static int bcm_get_resources(struct bcm_device *dev) 1011 { 1012 const struct dmi_system_id *dmi_id; 1013 int err; 1014 1015 dev->name = dev_name(dev->dev); 1016 1017 if (x86_apple_machine && !bcm_apple_get_resources(dev)) 1018 return 0; 1019 1020 dev->txco_clk = bcm_get_txco(dev->dev); 1021 1022 /* Handle deferred probing */ 1023 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) 1024 return PTR_ERR(dev->txco_clk); 1025 1026 /* Ignore all other errors as before */ 1027 if (IS_ERR(dev->txco_clk)) 1028 dev->txco_clk = NULL; 1029 1030 dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); 1031 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) 1032 return PTR_ERR(dev->lpo_clk); 1033 1034 if (IS_ERR(dev->lpo_clk)) 1035 dev->lpo_clk = NULL; 1036 1037 /* Check if we accidentally fetched the lpo clock twice */ 1038 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { 1039 devm_clk_put(dev->dev, dev->txco_clk); 1040 dev->txco_clk = NULL; 1041 } 1042 1043 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", 1044 GPIOD_OUT_LOW); 1045 if (IS_ERR(dev->device_wakeup)) 1046 return PTR_ERR(dev->device_wakeup); 1047 1048 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", 1049 GPIOD_OUT_LOW); 1050 if (IS_ERR(dev->shutdown)) 1051 return PTR_ERR(dev->shutdown); 1052 1053 dev->set_device_wakeup = bcm_gpio_set_device_wakeup; 1054 dev->set_shutdown = bcm_gpio_set_shutdown; 1055 1056 dev->supplies[0].supply = "vbat"; 1057 dev->supplies[1].supply = "vddio"; 1058 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, 1059 dev->supplies); 1060 if (err) 1061 return err; 1062 1063 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ 1064 if (dev->irq <= 0) { 1065 struct gpio_desc *gpio; 1066 1067 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", 1068 GPIOD_IN); 1069 if (IS_ERR(gpio)) 1070 return PTR_ERR(gpio); 1071 1072 dev->irq = gpiod_to_irq(gpio); 1073 } 1074 1075 dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); 1076 if (dmi_id) { 1077 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", 1078 dmi_id->ident); 1079 dev->irq = 0; 1080 } 1081 1082 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); 1083 return 0; 1084 } 1085 1086 #ifdef CONFIG_ACPI 1087 static int bcm_acpi_probe(struct bcm_device *dev) 1088 { 1089 LIST_HEAD(resources); 1090 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; 1091 struct resource_entry *entry; 1092 int ret; 1093 1094 /* Retrieve UART ACPI info */ 1095 dev->gpio_int_idx = -1; 1096 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), 1097 &resources, bcm_resource, dev); 1098 if (ret < 0) 1099 return ret; 1100 1101 resource_list_for_each_entry(entry, &resources) { 1102 if (resource_type(entry->res) == IORESOURCE_IRQ) { 1103 dev->irq = entry->res->start; 1104 break; 1105 } 1106 } 1107 acpi_dev_free_resource_list(&resources); 1108 1109 /* If the DSDT uses an Interrupt resource for the IRQ, then there are 1110 * only 2 GPIO resources, we use the irq-last mapping for this, since 1111 * we already have an irq the 3th / last mapping will not be used. 1112 */ 1113 if (dev->irq) 1114 gpio_mapping = acpi_bcm_int_last_gpios; 1115 else if (dev->gpio_int_idx == 0) 1116 gpio_mapping = acpi_bcm_int_first_gpios; 1117 else if (dev->gpio_int_idx == 2) 1118 gpio_mapping = acpi_bcm_int_last_gpios; 1119 else 1120 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", 1121 dev->gpio_int_idx); 1122 1123 /* Warn if our expectations are not met. */ 1124 if (dev->gpio_count != (dev->irq ? 2 : 3)) 1125 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", 1126 dev->gpio_count); 1127 1128 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); 1129 if (ret) 1130 return ret; 1131 1132 if (irq_polarity != -1) { 1133 dev->irq_active_low = irq_polarity; 1134 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", 1135 dev->irq_active_low ? "low" : "high"); 1136 } 1137 1138 return 0; 1139 } 1140 #else 1141 static int bcm_acpi_probe(struct bcm_device *dev) 1142 { 1143 return -EINVAL; 1144 } 1145 #endif /* CONFIG_ACPI */ 1146 1147 static int bcm_of_probe(struct bcm_device *bdev) 1148 { 1149 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); 1150 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params", 1151 bdev->pcm_int_params, 5); 1152 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup"); 1153 bdev->irq_active_low = irq_get_trigger_type(bdev->irq) 1154 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW); 1155 return 0; 1156 } 1157 1158 static int bcm_probe(struct platform_device *pdev) 1159 { 1160 struct bcm_device *dev; 1161 int ret; 1162 1163 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 1164 if (!dev) 1165 return -ENOMEM; 1166 1167 dev->dev = &pdev->dev; 1168 dev->irq = platform_get_irq(pdev, 0); 1169 1170 /* Initialize routing field to an unused value */ 1171 dev->pcm_int_params[0] = 0xff; 1172 1173 if (has_acpi_companion(&pdev->dev)) { 1174 ret = bcm_acpi_probe(dev); 1175 if (ret) 1176 return ret; 1177 } 1178 1179 ret = bcm_get_resources(dev); 1180 if (ret) 1181 return ret; 1182 1183 platform_set_drvdata(pdev, dev); 1184 1185 dev_info(&pdev->dev, "%s device registered.\n", dev->name); 1186 1187 /* Place this instance on the device list */ 1188 mutex_lock(&bcm_device_lock); 1189 list_add_tail(&dev->list, &bcm_device_list); 1190 mutex_unlock(&bcm_device_lock); 1191 1192 ret = bcm_gpio_set_power(dev, false); 1193 if (ret) 1194 dev_err(&pdev->dev, "Failed to power down\n"); 1195 1196 return 0; 1197 } 1198 1199 static int bcm_remove(struct platform_device *pdev) 1200 { 1201 struct bcm_device *dev = platform_get_drvdata(pdev); 1202 1203 mutex_lock(&bcm_device_lock); 1204 list_del(&dev->list); 1205 mutex_unlock(&bcm_device_lock); 1206 1207 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); 1208 1209 return 0; 1210 } 1211 1212 static const struct hci_uart_proto bcm_proto = { 1213 .id = HCI_UART_BCM, 1214 .name = "Broadcom", 1215 .manufacturer = 15, 1216 .init_speed = 115200, 1217 .open = bcm_open, 1218 .close = bcm_close, 1219 .flush = bcm_flush, 1220 .setup = bcm_setup, 1221 .set_baudrate = bcm_set_baudrate, 1222 .recv = bcm_recv, 1223 .enqueue = bcm_enqueue, 1224 .dequeue = bcm_dequeue, 1225 }; 1226 1227 #ifdef CONFIG_ACPI 1228 static const struct acpi_device_id bcm_acpi_match[] = { 1229 { "BCM2E00" }, 1230 { "BCM2E01" }, 1231 { "BCM2E02" }, 1232 { "BCM2E03" }, 1233 { "BCM2E04" }, 1234 { "BCM2E05" }, 1235 { "BCM2E06" }, 1236 { "BCM2E07" }, 1237 { "BCM2E08" }, 1238 { "BCM2E09" }, 1239 { "BCM2E0A" }, 1240 { "BCM2E0B" }, 1241 { "BCM2E0C" }, 1242 { "BCM2E0D" }, 1243 { "BCM2E0E" }, 1244 { "BCM2E0F" }, 1245 { "BCM2E10" }, 1246 { "BCM2E11" }, 1247 { "BCM2E12" }, 1248 { "BCM2E13" }, 1249 { "BCM2E14" }, 1250 { "BCM2E15" }, 1251 { "BCM2E16" }, 1252 { "BCM2E17" }, 1253 { "BCM2E18" }, 1254 { "BCM2E19" }, 1255 { "BCM2E1A" }, 1256 { "BCM2E1B" }, 1257 { "BCM2E1C" }, 1258 { "BCM2E1D" }, 1259 { "BCM2E1F" }, 1260 { "BCM2E20" }, 1261 { "BCM2E21" }, 1262 { "BCM2E22" }, 1263 { "BCM2E23" }, 1264 { "BCM2E24" }, 1265 { "BCM2E25" }, 1266 { "BCM2E26" }, 1267 { "BCM2E27" }, 1268 { "BCM2E28" }, 1269 { "BCM2E29" }, 1270 { "BCM2E2A" }, 1271 { "BCM2E2B" }, 1272 { "BCM2E2C" }, 1273 { "BCM2E2D" }, 1274 { "BCM2E2E" }, 1275 { "BCM2E2F" }, 1276 { "BCM2E30" }, 1277 { "BCM2E31" }, 1278 { "BCM2E32" }, 1279 { "BCM2E33" }, 1280 { "BCM2E34" }, 1281 { "BCM2E35" }, 1282 { "BCM2E36" }, 1283 { "BCM2E37" }, 1284 { "BCM2E38" }, 1285 { "BCM2E39" }, 1286 { "BCM2E3A" }, 1287 { "BCM2E3B" }, 1288 { "BCM2E3C" }, 1289 { "BCM2E3D" }, 1290 { "BCM2E3E" }, 1291 { "BCM2E3F" }, 1292 { "BCM2E40" }, 1293 { "BCM2E41" }, 1294 { "BCM2E42" }, 1295 { "BCM2E43" }, 1296 { "BCM2E44" }, 1297 { "BCM2E45" }, 1298 { "BCM2E46" }, 1299 { "BCM2E47" }, 1300 { "BCM2E48" }, 1301 { "BCM2E49" }, 1302 { "BCM2E4A" }, 1303 { "BCM2E4B" }, 1304 { "BCM2E4C" }, 1305 { "BCM2E4D" }, 1306 { "BCM2E4E" }, 1307 { "BCM2E4F" }, 1308 { "BCM2E50" }, 1309 { "BCM2E51" }, 1310 { "BCM2E52" }, 1311 { "BCM2E53" }, 1312 { "BCM2E54" }, 1313 { "BCM2E55" }, 1314 { "BCM2E56" }, 1315 { "BCM2E57" }, 1316 { "BCM2E58" }, 1317 { "BCM2E59" }, 1318 { "BCM2E5A" }, 1319 { "BCM2E5B" }, 1320 { "BCM2E5C" }, 1321 { "BCM2E5D" }, 1322 { "BCM2E5E" }, 1323 { "BCM2E5F" }, 1324 { "BCM2E60" }, 1325 { "BCM2E61" }, 1326 { "BCM2E62" }, 1327 { "BCM2E63" }, 1328 { "BCM2E64" }, 1329 { "BCM2E65" }, 1330 { "BCM2E66" }, 1331 { "BCM2E67" }, 1332 { "BCM2E68" }, 1333 { "BCM2E69" }, 1334 { "BCM2E6B" }, 1335 { "BCM2E6D" }, 1336 { "BCM2E6E" }, 1337 { "BCM2E6F" }, 1338 { "BCM2E70" }, 1339 { "BCM2E71" }, 1340 { "BCM2E72" }, 1341 { "BCM2E73" }, 1342 { "BCM2E74" }, 1343 { "BCM2E75" }, 1344 { "BCM2E76" }, 1345 { "BCM2E77" }, 1346 { "BCM2E78" }, 1347 { "BCM2E79" }, 1348 { "BCM2E7A" }, 1349 { "BCM2E7B" }, 1350 { "BCM2E7C" }, 1351 { "BCM2E7D" }, 1352 { "BCM2E7E" }, 1353 { "BCM2E7F" }, 1354 { "BCM2E80" }, 1355 { "BCM2E81" }, 1356 { "BCM2E82" }, 1357 { "BCM2E83" }, 1358 { "BCM2E84" }, 1359 { "BCM2E85" }, 1360 { "BCM2E86" }, 1361 { "BCM2E87" }, 1362 { "BCM2E88" }, 1363 { "BCM2E89" }, 1364 { "BCM2E8A" }, 1365 { "BCM2E8B" }, 1366 { "BCM2E8C" }, 1367 { "BCM2E8D" }, 1368 { "BCM2E8E" }, 1369 { "BCM2E90" }, 1370 { "BCM2E92" }, 1371 { "BCM2E93" }, 1372 { "BCM2E94" }, 1373 { "BCM2E95" }, 1374 { "BCM2E96" }, 1375 { "BCM2E97" }, 1376 { "BCM2E98" }, 1377 { "BCM2E99" }, 1378 { "BCM2E9A" }, 1379 { "BCM2E9B" }, 1380 { "BCM2E9C" }, 1381 { "BCM2E9D" }, 1382 { "BCM2EA0" }, 1383 { "BCM2EA1" }, 1384 { "BCM2EA2" }, 1385 { "BCM2EA3" }, 1386 { "BCM2EA4" }, 1387 { "BCM2EA5" }, 1388 { "BCM2EA6" }, 1389 { "BCM2EA7" }, 1390 { "BCM2EA8" }, 1391 { "BCM2EA9" }, 1392 { "BCM2EAA" }, 1393 { "BCM2EAB" }, 1394 { "BCM2EAC" }, 1395 { }, 1396 }; 1397 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); 1398 #endif 1399 1400 /* suspend and resume callbacks */ 1401 static const struct dev_pm_ops bcm_pm_ops = { 1402 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) 1403 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) 1404 }; 1405 1406 static struct platform_driver bcm_driver = { 1407 .probe = bcm_probe, 1408 .remove = bcm_remove, 1409 .driver = { 1410 .name = "hci_bcm", 1411 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1412 .pm = &bcm_pm_ops, 1413 }, 1414 }; 1415 1416 static int bcm_serdev_probe(struct serdev_device *serdev) 1417 { 1418 struct bcm_device *bcmdev; 1419 const struct bcm_device_data *data; 1420 int err; 1421 1422 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); 1423 if (!bcmdev) 1424 return -ENOMEM; 1425 1426 bcmdev->dev = &serdev->dev; 1427 #ifdef CONFIG_PM 1428 bcmdev->hu = &bcmdev->serdev_hu; 1429 #endif 1430 bcmdev->serdev_hu.serdev = serdev; 1431 serdev_device_set_drvdata(serdev, bcmdev); 1432 1433 /* Initialize routing field to an unused value */ 1434 bcmdev->pcm_int_params[0] = 0xff; 1435 1436 if (has_acpi_companion(&serdev->dev)) 1437 err = bcm_acpi_probe(bcmdev); 1438 else 1439 err = bcm_of_probe(bcmdev); 1440 if (err) 1441 return err; 1442 1443 err = bcm_get_resources(bcmdev); 1444 if (err) 1445 return err; 1446 1447 if (!bcmdev->shutdown) { 1448 dev_warn(&serdev->dev, 1449 "No reset resource, using default baud rate\n"); 1450 bcmdev->oper_speed = bcmdev->init_speed; 1451 } 1452 1453 err = bcm_gpio_set_power(bcmdev, false); 1454 if (err) 1455 dev_err(&serdev->dev, "Failed to power down\n"); 1456 1457 data = device_get_match_data(bcmdev->dev); 1458 if (data) { 1459 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; 1460 bcmdev->drive_rts_on_open = data->drive_rts_on_open; 1461 } 1462 1463 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); 1464 } 1465 1466 static void bcm_serdev_remove(struct serdev_device *serdev) 1467 { 1468 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); 1469 1470 hci_uart_unregister_device(&bcmdev->serdev_hu); 1471 } 1472 1473 #ifdef CONFIG_OF 1474 static struct bcm_device_data bcm4354_device_data = { 1475 .no_early_set_baudrate = true, 1476 }; 1477 1478 static struct bcm_device_data bcm43438_device_data = { 1479 .drive_rts_on_open = true, 1480 }; 1481 1482 static const struct of_device_id bcm_bluetooth_of_match[] = { 1483 { .compatible = "brcm,bcm20702a1" }, 1484 { .compatible = "brcm,bcm4329-bt" }, 1485 { .compatible = "brcm,bcm4345c5" }, 1486 { .compatible = "brcm,bcm4330-bt" }, 1487 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, 1488 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, 1489 { .compatible = "brcm,bcm4335a0" }, 1490 { }, 1491 }; 1492 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); 1493 #endif 1494 1495 static struct serdev_device_driver bcm_serdev_driver = { 1496 .probe = bcm_serdev_probe, 1497 .remove = bcm_serdev_remove, 1498 .driver = { 1499 .name = "hci_uart_bcm", 1500 .of_match_table = of_match_ptr(bcm_bluetooth_of_match), 1501 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1502 .pm = &bcm_pm_ops, 1503 }, 1504 }; 1505 1506 int __init bcm_init(void) 1507 { 1508 /* For now, we need to keep both platform device 1509 * driver (ACPI generated) and serdev driver (DT). 1510 */ 1511 platform_driver_register(&bcm_driver); 1512 serdev_device_driver_register(&bcm_serdev_driver); 1513 1514 return hci_uart_register_proto(&bcm_proto); 1515 } 1516 1517 int __exit bcm_deinit(void) 1518 { 1519 platform_driver_unregister(&bcm_driver); 1520 serdev_device_driver_unregister(&bcm_serdev_driver); 1521 1522 return hci_uart_unregister_proto(&bcm_proto); 1523 } 1524