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 * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable 57 * @max_autobaud_speed: max baudrate supported by device in autobaud mode 58 * @max_speed: max baudrate supported 59 */ 60 struct bcm_device_data { 61 bool no_early_set_baudrate; 62 bool drive_rts_on_open; 63 bool no_uart_clock_set; 64 u32 max_autobaud_speed; 65 u32 max_speed; 66 }; 67 68 /** 69 * struct bcm_device - device driver resources 70 * @serdev_hu: HCI UART controller struct 71 * @list: bcm_device_list node 72 * @dev: physical UART slave 73 * @name: device name logged by bt_dev_*() functions 74 * @device_wakeup: BT_WAKE pin, 75 * assert = Bluetooth device must wake up or remain awake, 76 * deassert = Bluetooth device may sleep when sleep criteria are met 77 * @shutdown: BT_REG_ON pin, 78 * power up or power down Bluetooth device internal regulators 79 * @reset: BT_RST_N pin, 80 * active low resets the Bluetooth logic core 81 * @set_device_wakeup: callback to toggle BT_WAKE pin 82 * either by accessing @device_wakeup or by calling @btlp 83 * @set_shutdown: callback to toggle BT_REG_ON pin 84 * either by accessing @shutdown or by calling @btpu/@btpd 85 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") 86 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") 87 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") 88 * @gpio_count: internal counter for GPIO resources associated with ACPI device 89 * @gpio_int_idx: index in _CRS for GpioInt() resource 90 * @txco_clk: external reference frequency clock used by Bluetooth device 91 * @lpo_clk: external LPO clock used by Bluetooth device 92 * @supplies: VBAT and VDDIO supplies used by Bluetooth device 93 * @res_enabled: whether clocks and supplies are prepared and enabled 94 * @init_speed: default baudrate of Bluetooth device; 95 * the host UART is initially set to this baudrate so that 96 * it can configure the Bluetooth device for @oper_speed 97 * @oper_speed: preferred baudrate of Bluetooth device; 98 * set to 0 if @init_speed is already the preferred baudrate 99 * @irq: interrupt triggered by HOST_WAKE_BT pin 100 * @irq_active_low: whether @irq is active low 101 * @irq_acquired: flag to show if IRQ handler has been assigned 102 * @hu: pointer to HCI UART controller struct, 103 * used to disable flow control during runtime suspend and system sleep 104 * @is_suspended: whether flow control is currently disabled 105 * @no_early_set_baudrate: don't set_baudrate before setup() 106 * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it 107 * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable 108 * @pcm_int_params: keep the initial PCM configuration 109 * @use_autobaud_mode: start Bluetooth device in autobaud mode 110 * @max_autobaud_speed: max baudrate supported by device in autobaud mode 111 */ 112 struct bcm_device { 113 /* Must be the first member, hci_serdev.c expects this. */ 114 struct hci_uart serdev_hu; 115 struct list_head list; 116 117 struct device *dev; 118 119 const char *name; 120 struct gpio_desc *device_wakeup; 121 struct gpio_desc *shutdown; 122 struct gpio_desc *reset; 123 int (*set_device_wakeup)(struct bcm_device *, bool); 124 int (*set_shutdown)(struct bcm_device *, bool); 125 #ifdef CONFIG_ACPI 126 acpi_handle btlp, btpu, btpd; 127 int gpio_count; 128 int gpio_int_idx; 129 #endif 130 131 struct clk *txco_clk; 132 struct clk *lpo_clk; 133 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; 134 bool res_enabled; 135 136 u32 init_speed; 137 u32 oper_speed; 138 int irq; 139 bool irq_active_low; 140 bool irq_acquired; 141 142 #ifdef CONFIG_PM 143 struct hci_uart *hu; 144 bool is_suspended; 145 #endif 146 bool no_early_set_baudrate; 147 bool drive_rts_on_open; 148 bool no_uart_clock_set; 149 bool use_autobaud_mode; 150 u8 pcm_int_params[5]; 151 u32 max_autobaud_speed; 152 }; 153 154 /* generic bcm uart resources */ 155 struct bcm_data { 156 struct sk_buff *rx_skb; 157 struct sk_buff_head txq; 158 159 struct bcm_device *dev; 160 }; 161 162 /* List of BCM BT UART devices */ 163 static DEFINE_MUTEX(bcm_device_lock); 164 static LIST_HEAD(bcm_device_list); 165 166 static int irq_polarity = -1; 167 module_param(irq_polarity, int, 0444); 168 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); 169 170 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 171 { 172 if (hu->serdev) 173 serdev_device_set_baudrate(hu->serdev, speed); 174 else 175 hci_uart_set_baudrate(hu, speed); 176 } 177 178 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) 179 { 180 struct hci_dev *hdev = hu->hdev; 181 struct bcm_data *bcm = hu->priv; 182 struct sk_buff *skb; 183 struct bcm_update_uart_baud_rate param; 184 185 if (speed > 3000000 && !bcm->dev->no_uart_clock_set) { 186 struct bcm_write_uart_clock_setting clock; 187 188 clock.type = BCM_UART_CLOCK_48MHZ; 189 190 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); 191 192 /* This Broadcom specific command changes the UART's controller 193 * clock for baud rate > 3000000. 194 */ 195 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); 196 if (IS_ERR(skb)) { 197 int err = PTR_ERR(skb); 198 bt_dev_err(hdev, "BCM: failed to write clock (%d)", 199 err); 200 return err; 201 } 202 203 kfree_skb(skb); 204 } 205 206 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); 207 208 param.zero = cpu_to_le16(0); 209 param.baud_rate = cpu_to_le32(speed); 210 211 /* This Broadcom specific command changes the UART's controller baud 212 * rate. 213 */ 214 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, 215 HCI_INIT_TIMEOUT); 216 if (IS_ERR(skb)) { 217 int err = PTR_ERR(skb); 218 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", 219 err); 220 return err; 221 } 222 223 kfree_skb(skb); 224 225 return 0; 226 } 227 228 /* bcm_device_exists should be protected by bcm_device_lock */ 229 static bool bcm_device_exists(struct bcm_device *device) 230 { 231 struct list_head *p; 232 233 #ifdef CONFIG_PM 234 /* Devices using serdev always exist */ 235 if (device && device->hu && device->hu->serdev) 236 return true; 237 #endif 238 239 list_for_each(p, &bcm_device_list) { 240 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 241 242 if (device == dev) 243 return true; 244 } 245 246 return false; 247 } 248 249 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) 250 { 251 int err; 252 253 if (powered && !dev->res_enabled) { 254 /* Intel Macs use bcm_apple_get_resources() and don't 255 * have regulator supplies configured. 256 */ 257 if (dev->supplies[0].supply) { 258 err = regulator_bulk_enable(BCM_NUM_SUPPLIES, 259 dev->supplies); 260 if (err) 261 return err; 262 } 263 264 /* LPO clock needs to be 32.768 kHz */ 265 err = clk_set_rate(dev->lpo_clk, 32768); 266 if (err) { 267 dev_err(dev->dev, "Could not set LPO clock rate\n"); 268 goto err_regulator_disable; 269 } 270 271 err = clk_prepare_enable(dev->lpo_clk); 272 if (err) 273 goto err_regulator_disable; 274 275 err = clk_prepare_enable(dev->txco_clk); 276 if (err) 277 goto err_lpo_clk_disable; 278 } 279 280 err = dev->set_shutdown(dev, powered); 281 if (err) 282 goto err_txco_clk_disable; 283 284 err = dev->set_device_wakeup(dev, powered); 285 if (err) 286 goto err_revert_shutdown; 287 288 if (!powered && dev->res_enabled) { 289 clk_disable_unprepare(dev->txco_clk); 290 clk_disable_unprepare(dev->lpo_clk); 291 292 /* Intel Macs use bcm_apple_get_resources() and don't 293 * have regulator supplies configured. 294 */ 295 if (dev->supplies[0].supply) 296 regulator_bulk_disable(BCM_NUM_SUPPLIES, 297 dev->supplies); 298 } 299 300 /* wait for device to power on and come out of reset */ 301 usleep_range(100000, 120000); 302 303 dev->res_enabled = powered; 304 305 return 0; 306 307 err_revert_shutdown: 308 dev->set_shutdown(dev, !powered); 309 err_txco_clk_disable: 310 if (powered && !dev->res_enabled) 311 clk_disable_unprepare(dev->txco_clk); 312 err_lpo_clk_disable: 313 if (powered && !dev->res_enabled) 314 clk_disable_unprepare(dev->lpo_clk); 315 err_regulator_disable: 316 if (powered && !dev->res_enabled) 317 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); 318 return err; 319 } 320 321 #ifdef CONFIG_PM 322 static irqreturn_t bcm_host_wake(int irq, void *data) 323 { 324 struct bcm_device *bdev = data; 325 326 bt_dev_dbg(bdev, "Host wake IRQ"); 327 328 pm_runtime_get(bdev->dev); 329 pm_runtime_mark_last_busy(bdev->dev); 330 pm_runtime_put_autosuspend(bdev->dev); 331 332 return IRQ_HANDLED; 333 } 334 335 static int bcm_request_irq(struct bcm_data *bcm) 336 { 337 struct bcm_device *bdev = bcm->dev; 338 int err; 339 340 mutex_lock(&bcm_device_lock); 341 if (!bcm_device_exists(bdev)) { 342 err = -ENODEV; 343 goto unlock; 344 } 345 346 if (bdev->irq <= 0) { 347 err = -EOPNOTSUPP; 348 goto unlock; 349 } 350 351 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, 352 bdev->irq_active_low ? IRQF_TRIGGER_FALLING : 353 IRQF_TRIGGER_RISING, 354 "host_wake", bdev); 355 if (err) { 356 bdev->irq = err; 357 goto unlock; 358 } 359 360 bdev->irq_acquired = true; 361 362 device_init_wakeup(bdev->dev, true); 363 364 pm_runtime_set_autosuspend_delay(bdev->dev, 365 BCM_AUTOSUSPEND_DELAY); 366 pm_runtime_use_autosuspend(bdev->dev); 367 pm_runtime_set_active(bdev->dev); 368 pm_runtime_enable(bdev->dev); 369 370 unlock: 371 mutex_unlock(&bcm_device_lock); 372 373 return err; 374 } 375 376 static const struct bcm_set_sleep_mode default_sleep_params = { 377 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ 378 .idle_host = 2, /* idle threshold HOST, in 300ms */ 379 .idle_dev = 2, /* idle threshold device, in 300ms */ 380 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ 381 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ 382 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ 383 .combine_modes = 1, /* Combine sleep and LPM flag */ 384 .tristate_control = 0, /* Allow tri-state control of UART tx flag */ 385 /* Irrelevant USB flags */ 386 .usb_auto_sleep = 0, 387 .usb_resume_timeout = 0, 388 .break_to_host = 0, 389 .pulsed_host_wake = 1, 390 }; 391 392 static int bcm_setup_sleep(struct hci_uart *hu) 393 { 394 struct bcm_data *bcm = hu->priv; 395 struct sk_buff *skb; 396 struct bcm_set_sleep_mode sleep_params = default_sleep_params; 397 398 sleep_params.host_wake_active = !bcm->dev->irq_active_low; 399 400 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), 401 &sleep_params, HCI_INIT_TIMEOUT); 402 if (IS_ERR(skb)) { 403 int err = PTR_ERR(skb); 404 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); 405 return err; 406 } 407 kfree_skb(skb); 408 409 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); 410 411 return 0; 412 } 413 #else 414 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } 415 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } 416 #endif 417 418 static int bcm_set_diag(struct hci_dev *hdev, bool enable) 419 { 420 struct hci_uart *hu = hci_get_drvdata(hdev); 421 struct bcm_data *bcm = hu->priv; 422 struct sk_buff *skb; 423 424 if (!test_bit(HCI_RUNNING, &hdev->flags)) 425 return -ENETDOWN; 426 427 skb = bt_skb_alloc(3, GFP_KERNEL); 428 if (!skb) 429 return -ENOMEM; 430 431 skb_put_u8(skb, BCM_LM_DIAG_PKT); 432 skb_put_u8(skb, 0xf0); 433 skb_put_u8(skb, enable); 434 435 skb_queue_tail(&bcm->txq, skb); 436 hci_uart_tx_wakeup(hu); 437 438 return 0; 439 } 440 441 static int bcm_open(struct hci_uart *hu) 442 { 443 struct bcm_data *bcm; 444 struct list_head *p; 445 int err; 446 447 bt_dev_dbg(hu->hdev, "hu %p", hu); 448 449 if (!hci_uart_has_flow_control(hu)) 450 return -EOPNOTSUPP; 451 452 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); 453 if (!bcm) 454 return -ENOMEM; 455 456 skb_queue_head_init(&bcm->txq); 457 458 hu->priv = bcm; 459 460 mutex_lock(&bcm_device_lock); 461 462 if (hu->serdev) { 463 bcm->dev = serdev_device_get_drvdata(hu->serdev); 464 goto out; 465 } 466 467 if (!hu->tty->dev) 468 goto out; 469 470 list_for_each(p, &bcm_device_list) { 471 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 472 473 /* Retrieve saved bcm_device based on parent of the 474 * platform device (saved during device probe) and 475 * parent of tty device used by hci_uart 476 */ 477 if (hu->tty->dev->parent == dev->dev->parent) { 478 bcm->dev = dev; 479 #ifdef CONFIG_PM 480 dev->hu = hu; 481 #endif 482 break; 483 } 484 } 485 486 out: 487 if (bcm->dev) { 488 if (bcm->dev->use_autobaud_mode) 489 hci_uart_set_flow_control(hu, false); /* Assert BT_UART_CTS_N */ 490 else if (bcm->dev->drive_rts_on_open) 491 hci_uart_set_flow_control(hu, true); 492 493 if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed) 494 hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed); 495 else 496 hu->init_speed = bcm->dev->init_speed; 497 498 /* If oper_speed is set, ldisc/serdev will set the baudrate 499 * before calling setup() 500 */ 501 if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode) 502 hu->oper_speed = bcm->dev->oper_speed; 503 504 err = bcm_gpio_set_power(bcm->dev, true); 505 506 if (bcm->dev->drive_rts_on_open) 507 hci_uart_set_flow_control(hu, false); 508 509 if (err) 510 goto err_unset_hu; 511 } 512 513 mutex_unlock(&bcm_device_lock); 514 return 0; 515 516 err_unset_hu: 517 #ifdef CONFIG_PM 518 if (!hu->serdev) 519 bcm->dev->hu = NULL; 520 #endif 521 mutex_unlock(&bcm_device_lock); 522 hu->priv = NULL; 523 kfree(bcm); 524 return err; 525 } 526 527 static int bcm_close(struct hci_uart *hu) 528 { 529 struct bcm_data *bcm = hu->priv; 530 struct bcm_device *bdev = NULL; 531 int err; 532 533 bt_dev_dbg(hu->hdev, "hu %p", hu); 534 535 /* Protect bcm->dev against removal of the device or driver */ 536 mutex_lock(&bcm_device_lock); 537 538 if (hu->serdev) { 539 bdev = serdev_device_get_drvdata(hu->serdev); 540 } else if (bcm_device_exists(bcm->dev)) { 541 bdev = bcm->dev; 542 #ifdef CONFIG_PM 543 bdev->hu = NULL; 544 #endif 545 } 546 547 if (bdev) { 548 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { 549 devm_free_irq(bdev->dev, bdev->irq, bdev); 550 device_init_wakeup(bdev->dev, false); 551 pm_runtime_disable(bdev->dev); 552 } 553 554 err = bcm_gpio_set_power(bdev, false); 555 if (err) 556 bt_dev_err(hu->hdev, "Failed to power down"); 557 else 558 pm_runtime_set_suspended(bdev->dev); 559 } 560 mutex_unlock(&bcm_device_lock); 561 562 skb_queue_purge(&bcm->txq); 563 kfree_skb(bcm->rx_skb); 564 kfree(bcm); 565 566 hu->priv = NULL; 567 return 0; 568 } 569 570 static int bcm_flush(struct hci_uart *hu) 571 { 572 struct bcm_data *bcm = hu->priv; 573 574 bt_dev_dbg(hu->hdev, "hu %p", hu); 575 576 skb_queue_purge(&bcm->txq); 577 578 return 0; 579 } 580 581 static int bcm_setup(struct hci_uart *hu) 582 { 583 struct bcm_data *bcm = hu->priv; 584 bool fw_load_done = false; 585 bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0); 586 unsigned int speed; 587 int err; 588 589 bt_dev_dbg(hu->hdev, "hu %p", hu); 590 591 hu->hdev->set_diag = bcm_set_diag; 592 hu->hdev->set_bdaddr = btbcm_set_bdaddr; 593 594 err = btbcm_initialize(hu->hdev, &fw_load_done, use_autobaud_mode); 595 if (err) 596 return err; 597 598 if (!fw_load_done) 599 return 0; 600 601 /* Init speed if any */ 602 if (bcm->dev && bcm->dev->init_speed) 603 speed = bcm->dev->init_speed; 604 else if (hu->proto->init_speed) 605 speed = hu->proto->init_speed; 606 else 607 speed = 0; 608 609 if (speed) 610 host_set_baudrate(hu, speed); 611 612 /* Operational speed if any */ 613 if (hu->oper_speed) 614 speed = hu->oper_speed; 615 else if (bcm->dev && bcm->dev->oper_speed) 616 speed = bcm->dev->oper_speed; 617 else if (hu->proto->oper_speed) 618 speed = hu->proto->oper_speed; 619 else 620 speed = 0; 621 622 if (speed) { 623 err = bcm_set_baudrate(hu, speed); 624 if (!err) 625 host_set_baudrate(hu, speed); 626 } 627 628 /* PCM parameters if provided */ 629 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) { 630 struct bcm_set_pcm_int_params params; 631 632 btbcm_read_pcm_int_params(hu->hdev, ¶ms); 633 634 memcpy(¶ms, bcm->dev->pcm_int_params, 5); 635 btbcm_write_pcm_int_params(hu->hdev, ¶ms); 636 } 637 638 err = btbcm_finalize(hu->hdev, &fw_load_done, use_autobaud_mode); 639 if (err) 640 return err; 641 642 /* Some devices ship with the controller default address. 643 * Allow the bootloader to set a valid address through the 644 * device tree. 645 */ 646 if (test_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks)) 647 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks); 648 649 if (!bcm_request_irq(bcm)) 650 err = bcm_setup_sleep(hu); 651 652 return err; 653 } 654 655 #define BCM_RECV_LM_DIAG \ 656 .type = BCM_LM_DIAG_PKT, \ 657 .hlen = BCM_LM_DIAG_SIZE, \ 658 .loff = 0, \ 659 .lsize = 0, \ 660 .maxlen = BCM_LM_DIAG_SIZE 661 662 #define BCM_RECV_NULL \ 663 .type = BCM_NULL_PKT, \ 664 .hlen = BCM_NULL_SIZE, \ 665 .loff = 0, \ 666 .lsize = 0, \ 667 .maxlen = BCM_NULL_SIZE 668 669 #define BCM_RECV_TYPE49 \ 670 .type = BCM_TYPE49_PKT, \ 671 .hlen = BCM_TYPE49_SIZE, \ 672 .loff = 0, \ 673 .lsize = 0, \ 674 .maxlen = BCM_TYPE49_SIZE 675 676 #define BCM_RECV_TYPE52 \ 677 .type = BCM_TYPE52_PKT, \ 678 .hlen = BCM_TYPE52_SIZE, \ 679 .loff = 0, \ 680 .lsize = 0, \ 681 .maxlen = BCM_TYPE52_SIZE 682 683 static const struct h4_recv_pkt bcm_recv_pkts[] = { 684 { H4_RECV_ACL, .recv = hci_recv_frame }, 685 { H4_RECV_SCO, .recv = hci_recv_frame }, 686 { H4_RECV_EVENT, .recv = hci_recv_frame }, 687 { H4_RECV_ISO, .recv = hci_recv_frame }, 688 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, 689 { BCM_RECV_NULL, .recv = hci_recv_diag }, 690 { BCM_RECV_TYPE49, .recv = hci_recv_diag }, 691 { BCM_RECV_TYPE52, .recv = hci_recv_diag }, 692 }; 693 694 static int bcm_recv(struct hci_uart *hu, const void *data, int count) 695 { 696 struct bcm_data *bcm = hu->priv; 697 698 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 699 return -EUNATCH; 700 701 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, 702 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); 703 if (IS_ERR(bcm->rx_skb)) { 704 int err = PTR_ERR(bcm->rx_skb); 705 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 706 bcm->rx_skb = NULL; 707 return err; 708 } else if (!bcm->rx_skb) { 709 /* Delay auto-suspend when receiving completed packet */ 710 mutex_lock(&bcm_device_lock); 711 if (bcm->dev && bcm_device_exists(bcm->dev)) { 712 pm_runtime_get(bcm->dev->dev); 713 pm_runtime_mark_last_busy(bcm->dev->dev); 714 pm_runtime_put_autosuspend(bcm->dev->dev); 715 } 716 mutex_unlock(&bcm_device_lock); 717 } 718 719 return count; 720 } 721 722 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) 723 { 724 struct bcm_data *bcm = hu->priv; 725 726 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); 727 728 /* Prepend skb with frame type */ 729 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 730 skb_queue_tail(&bcm->txq, skb); 731 732 return 0; 733 } 734 735 static struct sk_buff *bcm_dequeue(struct hci_uart *hu) 736 { 737 struct bcm_data *bcm = hu->priv; 738 struct sk_buff *skb = NULL; 739 struct bcm_device *bdev = NULL; 740 741 mutex_lock(&bcm_device_lock); 742 743 if (bcm_device_exists(bcm->dev)) { 744 bdev = bcm->dev; 745 pm_runtime_get_sync(bdev->dev); 746 /* Shall be resumed here */ 747 } 748 749 skb = skb_dequeue(&bcm->txq); 750 751 if (bdev) { 752 pm_runtime_mark_last_busy(bdev->dev); 753 pm_runtime_put_autosuspend(bdev->dev); 754 } 755 756 mutex_unlock(&bcm_device_lock); 757 758 return skb; 759 } 760 761 #ifdef CONFIG_PM 762 static int bcm_suspend_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 if (!bdev->is_suspended && bdev->hu) { 770 hci_uart_set_flow_control(bdev->hu, true); 771 772 /* Once this returns, driver suspends BT via GPIO */ 773 bdev->is_suspended = true; 774 } 775 776 /* Suspend the device */ 777 err = bdev->set_device_wakeup(bdev, false); 778 if (err) { 779 if (bdev->is_suspended && bdev->hu) { 780 bdev->is_suspended = false; 781 hci_uart_set_flow_control(bdev->hu, false); 782 } 783 return -EBUSY; 784 } 785 786 bt_dev_dbg(bdev, "suspend, delaying 15 ms"); 787 msleep(15); 788 789 return 0; 790 } 791 792 static int bcm_resume_device(struct device *dev) 793 { 794 struct bcm_device *bdev = dev_get_drvdata(dev); 795 int err; 796 797 bt_dev_dbg(bdev, ""); 798 799 err = bdev->set_device_wakeup(bdev, true); 800 if (err) { 801 dev_err(dev, "Failed to power up\n"); 802 return err; 803 } 804 805 bt_dev_dbg(bdev, "resume, delaying 15 ms"); 806 msleep(15); 807 808 /* When this executes, the device has woken up already */ 809 if (bdev->is_suspended && bdev->hu) { 810 bdev->is_suspended = false; 811 812 hci_uart_set_flow_control(bdev->hu, false); 813 } 814 815 return 0; 816 } 817 #endif 818 819 #ifdef CONFIG_PM_SLEEP 820 /* suspend callback */ 821 static int bcm_suspend(struct device *dev) 822 { 823 struct bcm_device *bdev = dev_get_drvdata(dev); 824 int error; 825 826 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); 827 828 /* 829 * When used with a device instantiated as platform_device, bcm_suspend 830 * can be called at any time as long as the platform device is bound, 831 * so it should use bcm_device_lock to protect access to hci_uart 832 * and device_wake-up GPIO. 833 */ 834 mutex_lock(&bcm_device_lock); 835 836 if (!bdev->hu) 837 goto unlock; 838 839 if (pm_runtime_active(dev)) 840 bcm_suspend_device(dev); 841 842 if (device_may_wakeup(dev) && bdev->irq > 0) { 843 error = enable_irq_wake(bdev->irq); 844 if (!error) 845 bt_dev_dbg(bdev, "BCM irq: enabled"); 846 } 847 848 unlock: 849 mutex_unlock(&bcm_device_lock); 850 851 return 0; 852 } 853 854 /* resume callback */ 855 static int bcm_resume(struct device *dev) 856 { 857 struct bcm_device *bdev = dev_get_drvdata(dev); 858 int err = 0; 859 860 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); 861 862 /* 863 * When used with a device instantiated as platform_device, bcm_resume 864 * can be called at any time as long as platform device is bound, 865 * so it should use bcm_device_lock to protect access to hci_uart 866 * and device_wake-up GPIO. 867 */ 868 mutex_lock(&bcm_device_lock); 869 870 if (!bdev->hu) 871 goto unlock; 872 873 if (device_may_wakeup(dev) && bdev->irq > 0) { 874 disable_irq_wake(bdev->irq); 875 bt_dev_dbg(bdev, "BCM irq: disabled"); 876 } 877 878 err = bcm_resume_device(dev); 879 880 unlock: 881 mutex_unlock(&bcm_device_lock); 882 883 if (!err) { 884 pm_runtime_disable(dev); 885 pm_runtime_set_active(dev); 886 pm_runtime_enable(dev); 887 } 888 889 return 0; 890 } 891 #endif 892 893 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ 894 static struct gpiod_lookup_table irq_on_int33fc02_pin17_gpios = { 895 .dev_id = "serial0-0", 896 .table = { 897 GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH), 898 { } 899 }, 900 }; 901 902 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { 903 { 904 .ident = "Acer Iconia One 7 B1-750", 905 .matches = { 906 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 907 DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"), 908 }, 909 .driver_data = &irq_on_int33fc02_pin17_gpios, 910 }, 911 { 912 .ident = "Asus TF103C", 913 .matches = { 914 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 915 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), 916 }, 917 .driver_data = &irq_on_int33fc02_pin17_gpios, 918 }, 919 { 920 .ident = "Lenovo Yoga Tablet 2 830F/L / 1050F/L", 921 .matches = { 922 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."), 923 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"), 924 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), 925 /* Partial match on beginning of BIOS version */ 926 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"), 927 }, 928 .driver_data = &irq_on_int33fc02_pin17_gpios, 929 }, 930 { 931 .ident = "Meegopad T08", 932 .matches = { 933 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, 934 "To be filled by OEM."), 935 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), 936 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), 937 }, 938 }, 939 { } 940 }; 941 942 #ifdef CONFIG_ACPI 943 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 944 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 945 static const struct acpi_gpio_params third_gpio = { 2, 0, false }; 946 947 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { 948 { "device-wakeup-gpios", &first_gpio, 1 }, 949 { "shutdown-gpios", &second_gpio, 1 }, 950 { "host-wakeup-gpios", &third_gpio, 1 }, 951 { }, 952 }; 953 954 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { 955 { "host-wakeup-gpios", &first_gpio, 1 }, 956 { "device-wakeup-gpios", &second_gpio, 1 }, 957 { "shutdown-gpios", &third_gpio, 1 }, 958 { }, 959 }; 960 961 static int bcm_resource(struct acpi_resource *ares, void *data) 962 { 963 struct bcm_device *dev = data; 964 struct acpi_resource_extended_irq *irq; 965 struct acpi_resource_gpio *gpio; 966 struct acpi_resource_uart_serialbus *sb; 967 968 switch (ares->type) { 969 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 970 irq = &ares->data.extended_irq; 971 if (irq->polarity != ACPI_ACTIVE_LOW) 972 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); 973 dev->irq_active_low = true; 974 break; 975 976 case ACPI_RESOURCE_TYPE_GPIO: 977 gpio = &ares->data.gpio; 978 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 979 dev->gpio_int_idx = dev->gpio_count; 980 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; 981 } 982 dev->gpio_count++; 983 break; 984 985 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 986 sb = &ares->data.uart_serial_bus; 987 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { 988 dev->init_speed = sb->default_baud_rate; 989 dev->oper_speed = 4000000; 990 } 991 break; 992 993 default: 994 break; 995 } 996 997 return 0; 998 } 999 1000 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) 1001 { 1002 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) 1003 return -EIO; 1004 1005 return 0; 1006 } 1007 1008 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) 1009 { 1010 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, 1011 NULL, NULL, NULL))) 1012 return -EIO; 1013 1014 return 0; 1015 } 1016 1017 static int bcm_apple_get_resources(struct bcm_device *dev) 1018 { 1019 struct acpi_device *adev = ACPI_COMPANION(dev->dev); 1020 const union acpi_object *obj; 1021 1022 if (!adev || 1023 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || 1024 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || 1025 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) 1026 return -ENODEV; 1027 1028 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && 1029 obj->buffer.length == 8) 1030 dev->init_speed = *(u64 *)obj->buffer.pointer; 1031 1032 dev->set_device_wakeup = bcm_apple_set_device_wakeup; 1033 dev->set_shutdown = bcm_apple_set_shutdown; 1034 1035 return 0; 1036 } 1037 #else 1038 static inline int bcm_apple_get_resources(struct bcm_device *dev) 1039 { 1040 return -EOPNOTSUPP; 1041 } 1042 #endif /* CONFIG_ACPI */ 1043 1044 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) 1045 { 1046 gpiod_set_value_cansleep(dev->device_wakeup, awake); 1047 return 0; 1048 } 1049 1050 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) 1051 { 1052 gpiod_set_value_cansleep(dev->shutdown, powered); 1053 if (dev->reset) 1054 /* 1055 * The reset line is asserted on powerdown and deasserted 1056 * on poweron so the inverse of powered is used. Notice 1057 * that the GPIO line BT_RST_N needs to be specified as 1058 * active low in the device tree or similar system 1059 * description. 1060 */ 1061 gpiod_set_value_cansleep(dev->reset, !powered); 1062 return 0; 1063 } 1064 1065 /* Try a bunch of names for TXCO */ 1066 static struct clk *bcm_get_txco(struct device *dev) 1067 { 1068 struct clk *clk; 1069 1070 /* New explicit name */ 1071 clk = devm_clk_get(dev, "txco"); 1072 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1073 return clk; 1074 1075 /* Deprecated name */ 1076 clk = devm_clk_get(dev, "extclk"); 1077 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1078 return clk; 1079 1080 /* Original code used no name at all */ 1081 return devm_clk_get(dev, NULL); 1082 } 1083 1084 static int bcm_get_resources(struct bcm_device *dev) 1085 { 1086 const struct dmi_system_id *broken_irq_dmi_id; 1087 const char *irq_con_id = "host-wakeup"; 1088 int err; 1089 1090 dev->name = dev_name(dev->dev); 1091 1092 if (x86_apple_machine && !bcm_apple_get_resources(dev)) 1093 return 0; 1094 1095 dev->txco_clk = bcm_get_txco(dev->dev); 1096 1097 /* Handle deferred probing */ 1098 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) 1099 return PTR_ERR(dev->txco_clk); 1100 1101 /* Ignore all other errors as before */ 1102 if (IS_ERR(dev->txco_clk)) 1103 dev->txco_clk = NULL; 1104 1105 dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); 1106 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) 1107 return PTR_ERR(dev->lpo_clk); 1108 1109 if (IS_ERR(dev->lpo_clk)) 1110 dev->lpo_clk = NULL; 1111 1112 /* Check if we accidentally fetched the lpo clock twice */ 1113 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { 1114 devm_clk_put(dev->dev, dev->txco_clk); 1115 dev->txco_clk = NULL; 1116 } 1117 1118 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", 1119 GPIOD_OUT_LOW); 1120 if (IS_ERR(dev->device_wakeup)) 1121 return PTR_ERR(dev->device_wakeup); 1122 1123 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", 1124 GPIOD_OUT_LOW); 1125 if (IS_ERR(dev->shutdown)) 1126 return PTR_ERR(dev->shutdown); 1127 1128 dev->reset = devm_gpiod_get_optional(dev->dev, "reset", 1129 GPIOD_OUT_LOW); 1130 if (IS_ERR(dev->reset)) 1131 return PTR_ERR(dev->reset); 1132 1133 dev->set_device_wakeup = bcm_gpio_set_device_wakeup; 1134 dev->set_shutdown = bcm_gpio_set_shutdown; 1135 1136 dev->supplies[0].supply = "vbat"; 1137 dev->supplies[1].supply = "vddio"; 1138 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, 1139 dev->supplies); 1140 if (err) 1141 return err; 1142 1143 broken_irq_dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); 1144 if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) { 1145 gpiod_add_lookup_table(broken_irq_dmi_id->driver_data); 1146 irq_con_id = "host-wakeup-alt"; 1147 dev->irq_active_low = false; 1148 dev->irq = 0; 1149 } 1150 1151 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ 1152 if (dev->irq <= 0) { 1153 struct gpio_desc *gpio; 1154 1155 gpio = devm_gpiod_get_optional(dev->dev, irq_con_id, GPIOD_IN); 1156 if (IS_ERR(gpio)) 1157 return PTR_ERR(gpio); 1158 1159 dev->irq = gpiod_to_irq(gpio); 1160 } 1161 1162 if (broken_irq_dmi_id) { 1163 if (broken_irq_dmi_id->driver_data) { 1164 gpiod_remove_lookup_table(broken_irq_dmi_id->driver_data); 1165 } else { 1166 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", 1167 broken_irq_dmi_id->ident); 1168 dev->irq = 0; 1169 } 1170 } 1171 1172 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); 1173 return 0; 1174 } 1175 1176 #ifdef CONFIG_ACPI 1177 static int bcm_acpi_probe(struct bcm_device *dev) 1178 { 1179 LIST_HEAD(resources); 1180 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; 1181 struct resource_entry *entry; 1182 int ret; 1183 1184 /* Retrieve UART ACPI info */ 1185 dev->gpio_int_idx = -1; 1186 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), 1187 &resources, bcm_resource, dev); 1188 if (ret < 0) 1189 return ret; 1190 1191 resource_list_for_each_entry(entry, &resources) { 1192 if (resource_type(entry->res) == IORESOURCE_IRQ) { 1193 dev->irq = entry->res->start; 1194 break; 1195 } 1196 } 1197 acpi_dev_free_resource_list(&resources); 1198 1199 /* If the DSDT uses an Interrupt resource for the IRQ, then there are 1200 * only 2 GPIO resources, we use the irq-last mapping for this, since 1201 * we already have an irq the 3th / last mapping will not be used. 1202 */ 1203 if (dev->irq) 1204 gpio_mapping = acpi_bcm_int_last_gpios; 1205 else if (dev->gpio_int_idx == 0) 1206 gpio_mapping = acpi_bcm_int_first_gpios; 1207 else if (dev->gpio_int_idx == 2) 1208 gpio_mapping = acpi_bcm_int_last_gpios; 1209 else 1210 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", 1211 dev->gpio_int_idx); 1212 1213 /* Warn if our expectations are not met. */ 1214 if (dev->gpio_count != (dev->irq ? 2 : 3)) 1215 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", 1216 dev->gpio_count); 1217 1218 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); 1219 if (ret) 1220 return ret; 1221 1222 if (irq_polarity != -1) { 1223 dev->irq_active_low = irq_polarity; 1224 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", 1225 dev->irq_active_low ? "low" : "high"); 1226 } 1227 1228 return 0; 1229 } 1230 #else 1231 static int bcm_acpi_probe(struct bcm_device *dev) 1232 { 1233 return -EINVAL; 1234 } 1235 #endif /* CONFIG_ACPI */ 1236 1237 static int bcm_of_probe(struct bcm_device *bdev) 1238 { 1239 bdev->use_autobaud_mode = device_property_read_bool(bdev->dev, 1240 "brcm,requires-autobaud-mode"); 1241 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); 1242 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params", 1243 bdev->pcm_int_params, 5); 1244 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup"); 1245 bdev->irq_active_low = irq_get_trigger_type(bdev->irq) 1246 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW); 1247 return 0; 1248 } 1249 1250 static int bcm_probe(struct platform_device *pdev) 1251 { 1252 struct bcm_device *dev; 1253 int ret; 1254 1255 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 1256 if (!dev) 1257 return -ENOMEM; 1258 1259 dev->dev = &pdev->dev; 1260 1261 ret = platform_get_irq(pdev, 0); 1262 if (ret < 0) 1263 return ret; 1264 1265 dev->irq = ret; 1266 1267 /* Initialize routing field to an unused value */ 1268 dev->pcm_int_params[0] = 0xff; 1269 1270 if (has_acpi_companion(&pdev->dev)) { 1271 ret = bcm_acpi_probe(dev); 1272 if (ret) 1273 return ret; 1274 } 1275 1276 ret = bcm_get_resources(dev); 1277 if (ret) 1278 return ret; 1279 1280 platform_set_drvdata(pdev, dev); 1281 1282 dev_info(&pdev->dev, "%s device registered.\n", dev->name); 1283 1284 /* Place this instance on the device list */ 1285 mutex_lock(&bcm_device_lock); 1286 list_add_tail(&dev->list, &bcm_device_list); 1287 mutex_unlock(&bcm_device_lock); 1288 1289 ret = bcm_gpio_set_power(dev, false); 1290 if (ret) 1291 dev_err(&pdev->dev, "Failed to power down\n"); 1292 1293 return 0; 1294 } 1295 1296 static int bcm_remove(struct platform_device *pdev) 1297 { 1298 struct bcm_device *dev = platform_get_drvdata(pdev); 1299 1300 mutex_lock(&bcm_device_lock); 1301 list_del(&dev->list); 1302 mutex_unlock(&bcm_device_lock); 1303 1304 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); 1305 1306 return 0; 1307 } 1308 1309 static const struct hci_uart_proto bcm_proto = { 1310 .id = HCI_UART_BCM, 1311 .name = "Broadcom", 1312 .manufacturer = 15, 1313 .init_speed = 115200, 1314 .open = bcm_open, 1315 .close = bcm_close, 1316 .flush = bcm_flush, 1317 .setup = bcm_setup, 1318 .set_baudrate = bcm_set_baudrate, 1319 .recv = bcm_recv, 1320 .enqueue = bcm_enqueue, 1321 .dequeue = bcm_dequeue, 1322 }; 1323 1324 #ifdef CONFIG_ACPI 1325 1326 /* bcm43430a0/a1 BT does not support 48MHz UART clock, limit to 2000000 baud */ 1327 static struct bcm_device_data bcm43430_device_data = { 1328 .max_speed = 2000000, 1329 }; 1330 1331 static const struct acpi_device_id bcm_acpi_match[] = { 1332 { "BCM2E00" }, 1333 { "BCM2E01" }, 1334 { "BCM2E02" }, 1335 { "BCM2E03" }, 1336 { "BCM2E04" }, 1337 { "BCM2E05" }, 1338 { "BCM2E06" }, 1339 { "BCM2E07" }, 1340 { "BCM2E08" }, 1341 { "BCM2E09" }, 1342 { "BCM2E0A" }, 1343 { "BCM2E0B" }, 1344 { "BCM2E0C" }, 1345 { "BCM2E0D" }, 1346 { "BCM2E0E" }, 1347 { "BCM2E0F" }, 1348 { "BCM2E10" }, 1349 { "BCM2E11" }, 1350 { "BCM2E12" }, 1351 { "BCM2E13" }, 1352 { "BCM2E14" }, 1353 { "BCM2E15" }, 1354 { "BCM2E16" }, 1355 { "BCM2E17" }, 1356 { "BCM2E18" }, 1357 { "BCM2E19" }, 1358 { "BCM2E1A" }, 1359 { "BCM2E1B" }, 1360 { "BCM2E1C" }, 1361 { "BCM2E1D" }, 1362 { "BCM2E1F" }, 1363 { "BCM2E20" }, 1364 { "BCM2E21" }, 1365 { "BCM2E22" }, 1366 { "BCM2E23" }, 1367 { "BCM2E24" }, 1368 { "BCM2E25" }, 1369 { "BCM2E26" }, 1370 { "BCM2E27" }, 1371 { "BCM2E28" }, 1372 { "BCM2E29" }, 1373 { "BCM2E2A" }, 1374 { "BCM2E2B" }, 1375 { "BCM2E2C" }, 1376 { "BCM2E2D" }, 1377 { "BCM2E2E" }, 1378 { "BCM2E2F" }, 1379 { "BCM2E30" }, 1380 { "BCM2E31" }, 1381 { "BCM2E32" }, 1382 { "BCM2E33" }, 1383 { "BCM2E34" }, 1384 { "BCM2E35" }, 1385 { "BCM2E36" }, 1386 { "BCM2E37" }, 1387 { "BCM2E38" }, 1388 { "BCM2E39" }, 1389 { "BCM2E3A" }, 1390 { "BCM2E3B" }, 1391 { "BCM2E3C" }, 1392 { "BCM2E3D" }, 1393 { "BCM2E3E" }, 1394 { "BCM2E3F" }, 1395 { "BCM2E40" }, 1396 { "BCM2E41" }, 1397 { "BCM2E42" }, 1398 { "BCM2E43" }, 1399 { "BCM2E44" }, 1400 { "BCM2E45" }, 1401 { "BCM2E46" }, 1402 { "BCM2E47" }, 1403 { "BCM2E48" }, 1404 { "BCM2E49" }, 1405 { "BCM2E4A" }, 1406 { "BCM2E4B" }, 1407 { "BCM2E4C" }, 1408 { "BCM2E4D" }, 1409 { "BCM2E4E" }, 1410 { "BCM2E4F" }, 1411 { "BCM2E50" }, 1412 { "BCM2E51" }, 1413 { "BCM2E52" }, 1414 { "BCM2E53" }, 1415 { "BCM2E54" }, 1416 { "BCM2E55" }, 1417 { "BCM2E56" }, 1418 { "BCM2E57" }, 1419 { "BCM2E58" }, 1420 { "BCM2E59" }, 1421 { "BCM2E5A" }, 1422 { "BCM2E5B" }, 1423 { "BCM2E5C" }, 1424 { "BCM2E5D" }, 1425 { "BCM2E5E" }, 1426 { "BCM2E5F" }, 1427 { "BCM2E60" }, 1428 { "BCM2E61" }, 1429 { "BCM2E62" }, 1430 { "BCM2E63" }, 1431 { "BCM2E64" }, 1432 { "BCM2E65" }, 1433 { "BCM2E66" }, 1434 { "BCM2E67" }, 1435 { "BCM2E68" }, 1436 { "BCM2E69" }, 1437 { "BCM2E6B" }, 1438 { "BCM2E6D" }, 1439 { "BCM2E6E" }, 1440 { "BCM2E6F" }, 1441 { "BCM2E70" }, 1442 { "BCM2E71" }, 1443 { "BCM2E72" }, 1444 { "BCM2E73" }, 1445 { "BCM2E74", (long)&bcm43430_device_data }, 1446 { "BCM2E75", (long)&bcm43430_device_data }, 1447 { "BCM2E76" }, 1448 { "BCM2E77" }, 1449 { "BCM2E78" }, 1450 { "BCM2E79" }, 1451 { "BCM2E7A" }, 1452 { "BCM2E7B", (long)&bcm43430_device_data }, 1453 { "BCM2E7C" }, 1454 { "BCM2E7D" }, 1455 { "BCM2E7E" }, 1456 { "BCM2E7F" }, 1457 { "BCM2E80", (long)&bcm43430_device_data }, 1458 { "BCM2E81" }, 1459 { "BCM2E82" }, 1460 { "BCM2E83" }, 1461 { "BCM2E84" }, 1462 { "BCM2E85" }, 1463 { "BCM2E86" }, 1464 { "BCM2E87" }, 1465 { "BCM2E88" }, 1466 { "BCM2E89", (long)&bcm43430_device_data }, 1467 { "BCM2E8A" }, 1468 { "BCM2E8B" }, 1469 { "BCM2E8C" }, 1470 { "BCM2E8D" }, 1471 { "BCM2E8E" }, 1472 { "BCM2E90" }, 1473 { "BCM2E92" }, 1474 { "BCM2E93" }, 1475 { "BCM2E94", (long)&bcm43430_device_data }, 1476 { "BCM2E95" }, 1477 { "BCM2E96" }, 1478 { "BCM2E97" }, 1479 { "BCM2E98" }, 1480 { "BCM2E99", (long)&bcm43430_device_data }, 1481 { "BCM2E9A" }, 1482 { "BCM2E9B", (long)&bcm43430_device_data }, 1483 { "BCM2E9C" }, 1484 { "BCM2E9D" }, 1485 { "BCM2E9F", (long)&bcm43430_device_data }, 1486 { "BCM2EA0" }, 1487 { "BCM2EA1" }, 1488 { "BCM2EA2", (long)&bcm43430_device_data }, 1489 { "BCM2EA3", (long)&bcm43430_device_data }, 1490 { "BCM2EA4" }, 1491 { "BCM2EA5" }, 1492 { "BCM2EA6" }, 1493 { "BCM2EA7" }, 1494 { "BCM2EA8" }, 1495 { "BCM2EA9" }, 1496 { "BCM2EAA", (long)&bcm43430_device_data }, 1497 { "BCM2EAB", (long)&bcm43430_device_data }, 1498 { "BCM2EAC", (long)&bcm43430_device_data }, 1499 { }, 1500 }; 1501 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); 1502 #endif 1503 1504 /* suspend and resume callbacks */ 1505 static const struct dev_pm_ops bcm_pm_ops = { 1506 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) 1507 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) 1508 }; 1509 1510 static struct platform_driver bcm_driver = { 1511 .probe = bcm_probe, 1512 .remove = bcm_remove, 1513 .driver = { 1514 .name = "hci_bcm", 1515 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1516 .pm = &bcm_pm_ops, 1517 }, 1518 }; 1519 1520 static int bcm_serdev_probe(struct serdev_device *serdev) 1521 { 1522 struct bcm_device *bcmdev; 1523 const struct bcm_device_data *data; 1524 int err; 1525 1526 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); 1527 if (!bcmdev) 1528 return -ENOMEM; 1529 1530 bcmdev->dev = &serdev->dev; 1531 #ifdef CONFIG_PM 1532 bcmdev->hu = &bcmdev->serdev_hu; 1533 #endif 1534 bcmdev->serdev_hu.serdev = serdev; 1535 serdev_device_set_drvdata(serdev, bcmdev); 1536 1537 /* Initialize routing field to an unused value */ 1538 bcmdev->pcm_int_params[0] = 0xff; 1539 1540 if (has_acpi_companion(&serdev->dev)) 1541 err = bcm_acpi_probe(bcmdev); 1542 else 1543 err = bcm_of_probe(bcmdev); 1544 if (err) 1545 return err; 1546 1547 err = bcm_get_resources(bcmdev); 1548 if (err) 1549 return err; 1550 1551 if (!bcmdev->shutdown) { 1552 dev_warn(&serdev->dev, 1553 "No reset resource, using default baud rate\n"); 1554 bcmdev->oper_speed = bcmdev->init_speed; 1555 } 1556 1557 err = bcm_gpio_set_power(bcmdev, false); 1558 if (err) 1559 dev_err(&serdev->dev, "Failed to power down\n"); 1560 1561 data = device_get_match_data(bcmdev->dev); 1562 if (data) { 1563 bcmdev->max_autobaud_speed = data->max_autobaud_speed; 1564 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; 1565 bcmdev->drive_rts_on_open = data->drive_rts_on_open; 1566 bcmdev->no_uart_clock_set = data->no_uart_clock_set; 1567 if (data->max_speed && bcmdev->oper_speed > data->max_speed) 1568 bcmdev->oper_speed = data->max_speed; 1569 } 1570 1571 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); 1572 } 1573 1574 static void bcm_serdev_remove(struct serdev_device *serdev) 1575 { 1576 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); 1577 1578 hci_uart_unregister_device(&bcmdev->serdev_hu); 1579 } 1580 1581 #ifdef CONFIG_OF 1582 static struct bcm_device_data bcm4354_device_data = { 1583 .no_early_set_baudrate = true, 1584 }; 1585 1586 static struct bcm_device_data bcm43438_device_data = { 1587 .drive_rts_on_open = true, 1588 }; 1589 1590 static struct bcm_device_data cyw4373a0_device_data = { 1591 .no_uart_clock_set = true, 1592 }; 1593 1594 static struct bcm_device_data cyw55572_device_data = { 1595 .max_autobaud_speed = 921600, 1596 }; 1597 1598 static const struct of_device_id bcm_bluetooth_of_match[] = { 1599 { .compatible = "brcm,bcm20702a1" }, 1600 { .compatible = "brcm,bcm4329-bt" }, 1601 { .compatible = "brcm,bcm4330-bt" }, 1602 { .compatible = "brcm,bcm4334-bt" }, 1603 { .compatible = "brcm,bcm4345c5" }, 1604 { .compatible = "brcm,bcm43430a0-bt" }, 1605 { .compatible = "brcm,bcm43430a1-bt" }, 1606 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, 1607 { .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data }, 1608 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, 1609 { .compatible = "brcm,bcm4335a0" }, 1610 { .compatible = "cypress,cyw4373a0-bt", .data = &cyw4373a0_device_data }, 1611 { .compatible = "infineon,cyw55572-bt", .data = &cyw55572_device_data }, 1612 { }, 1613 }; 1614 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); 1615 #endif 1616 1617 static struct serdev_device_driver bcm_serdev_driver = { 1618 .probe = bcm_serdev_probe, 1619 .remove = bcm_serdev_remove, 1620 .driver = { 1621 .name = "hci_uart_bcm", 1622 .of_match_table = of_match_ptr(bcm_bluetooth_of_match), 1623 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1624 .pm = &bcm_pm_ops, 1625 }, 1626 }; 1627 1628 int __init bcm_init(void) 1629 { 1630 /* For now, we need to keep both platform device 1631 * driver (ACPI generated) and serdev driver (DT). 1632 */ 1633 platform_driver_register(&bcm_driver); 1634 serdev_device_driver_register(&bcm_serdev_driver); 1635 1636 return hci_uart_register_proto(&bcm_proto); 1637 } 1638 1639 int __exit bcm_deinit(void) 1640 { 1641 platform_driver_unregister(&bcm_driver); 1642 serdev_device_driver_unregister(&bcm_serdev_driver); 1643 1644 return hci_uart_unregister_proto(&bcm_proto); 1645 } 1646