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 */ 59 struct bcm_device_data { 60 bool no_early_set_baudrate; 61 bool drive_rts_on_open; 62 bool no_uart_clock_set; 63 u32 max_autobaud_speed; 64 }; 65 66 /** 67 * struct bcm_device - device driver resources 68 * @serdev_hu: HCI UART controller struct 69 * @list: bcm_device_list node 70 * @dev: physical UART slave 71 * @name: device name logged by bt_dev_*() functions 72 * @device_wakeup: BT_WAKE pin, 73 * assert = Bluetooth device must wake up or remain awake, 74 * deassert = Bluetooth device may sleep when sleep criteria are met 75 * @shutdown: BT_REG_ON pin, 76 * power up or power down Bluetooth device internal regulators 77 * @reset: BT_RST_N pin, 78 * active low resets the Bluetooth logic core 79 * @set_device_wakeup: callback to toggle BT_WAKE pin 80 * either by accessing @device_wakeup or by calling @btlp 81 * @set_shutdown: callback to toggle BT_REG_ON pin 82 * either by accessing @shutdown or by calling @btpu/@btpd 83 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") 84 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") 85 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") 86 * @gpio_count: internal counter for GPIO resources associated with ACPI device 87 * @gpio_int_idx: index in _CRS for GpioInt() resource 88 * @txco_clk: external reference frequency clock used by Bluetooth device 89 * @lpo_clk: external LPO clock used by Bluetooth device 90 * @supplies: VBAT and VDDIO supplies used by Bluetooth device 91 * @res_enabled: whether clocks and supplies are prepared and enabled 92 * @init_speed: default baudrate of Bluetooth device; 93 * the host UART is initially set to this baudrate so that 94 * it can configure the Bluetooth device for @oper_speed 95 * @oper_speed: preferred baudrate of Bluetooth device; 96 * set to 0 if @init_speed is already the preferred baudrate 97 * @irq: interrupt triggered by HOST_WAKE_BT pin 98 * @irq_active_low: whether @irq is active low 99 * @irq_acquired: flag to show if IRQ handler has been assigned 100 * @hu: pointer to HCI UART controller struct, 101 * used to disable flow control during runtime suspend and system sleep 102 * @is_suspended: whether flow control is currently disabled 103 * @no_early_set_baudrate: don't set_baudrate before setup() 104 * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it 105 * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable 106 * @pcm_int_params: keep the initial PCM configuration 107 * @use_autobaud_mode: start Bluetooth device in autobaud mode 108 * @max_autobaud_speed: max baudrate supported by device in autobaud mode 109 */ 110 struct bcm_device { 111 /* Must be the first member, hci_serdev.c expects this. */ 112 struct hci_uart serdev_hu; 113 struct list_head list; 114 115 struct device *dev; 116 117 const char *name; 118 struct gpio_desc *device_wakeup; 119 struct gpio_desc *shutdown; 120 struct gpio_desc *reset; 121 int (*set_device_wakeup)(struct bcm_device *, bool); 122 int (*set_shutdown)(struct bcm_device *, bool); 123 #ifdef CONFIG_ACPI 124 acpi_handle btlp, btpu, btpd; 125 int gpio_count; 126 int gpio_int_idx; 127 #endif 128 129 struct clk *txco_clk; 130 struct clk *lpo_clk; 131 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; 132 bool res_enabled; 133 134 u32 init_speed; 135 u32 oper_speed; 136 int irq; 137 bool irq_active_low; 138 bool irq_acquired; 139 140 #ifdef CONFIG_PM 141 struct hci_uart *hu; 142 bool is_suspended; 143 #endif 144 bool no_early_set_baudrate; 145 bool drive_rts_on_open; 146 bool no_uart_clock_set; 147 bool use_autobaud_mode; 148 u8 pcm_int_params[5]; 149 u32 max_autobaud_speed; 150 }; 151 152 /* generic bcm uart resources */ 153 struct bcm_data { 154 struct sk_buff *rx_skb; 155 struct sk_buff_head txq; 156 157 struct bcm_device *dev; 158 }; 159 160 /* List of BCM BT UART devices */ 161 static DEFINE_MUTEX(bcm_device_lock); 162 static LIST_HEAD(bcm_device_list); 163 164 static int irq_polarity = -1; 165 module_param(irq_polarity, int, 0444); 166 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); 167 168 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 169 { 170 if (hu->serdev) 171 serdev_device_set_baudrate(hu->serdev, speed); 172 else 173 hci_uart_set_baudrate(hu, speed); 174 } 175 176 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) 177 { 178 struct hci_dev *hdev = hu->hdev; 179 struct bcm_data *bcm = hu->priv; 180 struct sk_buff *skb; 181 struct bcm_update_uart_baud_rate param; 182 183 if (speed > 3000000 && !bcm->dev->no_uart_clock_set) { 184 struct bcm_write_uart_clock_setting clock; 185 186 clock.type = BCM_UART_CLOCK_48MHZ; 187 188 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); 189 190 /* This Broadcom specific command changes the UART's controller 191 * clock for baud rate > 3000000. 192 */ 193 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); 194 if (IS_ERR(skb)) { 195 int err = PTR_ERR(skb); 196 bt_dev_err(hdev, "BCM: failed to write clock (%d)", 197 err); 198 return err; 199 } 200 201 kfree_skb(skb); 202 } 203 204 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); 205 206 param.zero = cpu_to_le16(0); 207 param.baud_rate = cpu_to_le32(speed); 208 209 /* This Broadcom specific command changes the UART's controller baud 210 * rate. 211 */ 212 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, 213 HCI_INIT_TIMEOUT); 214 if (IS_ERR(skb)) { 215 int err = PTR_ERR(skb); 216 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", 217 err); 218 return err; 219 } 220 221 kfree_skb(skb); 222 223 return 0; 224 } 225 226 /* bcm_device_exists should be protected by bcm_device_lock */ 227 static bool bcm_device_exists(struct bcm_device *device) 228 { 229 struct list_head *p; 230 231 #ifdef CONFIG_PM 232 /* Devices using serdev always exist */ 233 if (device && device->hu && device->hu->serdev) 234 return true; 235 #endif 236 237 list_for_each(p, &bcm_device_list) { 238 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 239 240 if (device == dev) 241 return true; 242 } 243 244 return false; 245 } 246 247 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) 248 { 249 int err; 250 251 if (powered && !dev->res_enabled) { 252 /* Intel Macs use bcm_apple_get_resources() and don't 253 * have regulator supplies configured. 254 */ 255 if (dev->supplies[0].supply) { 256 err = regulator_bulk_enable(BCM_NUM_SUPPLIES, 257 dev->supplies); 258 if (err) 259 return err; 260 } 261 262 /* LPO clock needs to be 32.768 kHz */ 263 err = clk_set_rate(dev->lpo_clk, 32768); 264 if (err) { 265 dev_err(dev->dev, "Could not set LPO clock rate\n"); 266 goto err_regulator_disable; 267 } 268 269 err = clk_prepare_enable(dev->lpo_clk); 270 if (err) 271 goto err_regulator_disable; 272 273 err = clk_prepare_enable(dev->txco_clk); 274 if (err) 275 goto err_lpo_clk_disable; 276 } 277 278 err = dev->set_shutdown(dev, powered); 279 if (err) 280 goto err_txco_clk_disable; 281 282 err = dev->set_device_wakeup(dev, powered); 283 if (err) 284 goto err_revert_shutdown; 285 286 if (!powered && dev->res_enabled) { 287 clk_disable_unprepare(dev->txco_clk); 288 clk_disable_unprepare(dev->lpo_clk); 289 290 /* Intel Macs use bcm_apple_get_resources() and don't 291 * have regulator supplies configured. 292 */ 293 if (dev->supplies[0].supply) 294 regulator_bulk_disable(BCM_NUM_SUPPLIES, 295 dev->supplies); 296 } 297 298 /* wait for device to power on and come out of reset */ 299 usleep_range(100000, 120000); 300 301 dev->res_enabled = powered; 302 303 return 0; 304 305 err_revert_shutdown: 306 dev->set_shutdown(dev, !powered); 307 err_txco_clk_disable: 308 if (powered && !dev->res_enabled) 309 clk_disable_unprepare(dev->txco_clk); 310 err_lpo_clk_disable: 311 if (powered && !dev->res_enabled) 312 clk_disable_unprepare(dev->lpo_clk); 313 err_regulator_disable: 314 if (powered && !dev->res_enabled) 315 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); 316 return err; 317 } 318 319 #ifdef CONFIG_PM 320 static irqreturn_t bcm_host_wake(int irq, void *data) 321 { 322 struct bcm_device *bdev = data; 323 324 bt_dev_dbg(bdev, "Host wake IRQ"); 325 326 pm_runtime_get(bdev->dev); 327 pm_runtime_mark_last_busy(bdev->dev); 328 pm_runtime_put_autosuspend(bdev->dev); 329 330 return IRQ_HANDLED; 331 } 332 333 static int bcm_request_irq(struct bcm_data *bcm) 334 { 335 struct bcm_device *bdev = bcm->dev; 336 int err; 337 338 mutex_lock(&bcm_device_lock); 339 if (!bcm_device_exists(bdev)) { 340 err = -ENODEV; 341 goto unlock; 342 } 343 344 if (bdev->irq <= 0) { 345 err = -EOPNOTSUPP; 346 goto unlock; 347 } 348 349 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, 350 bdev->irq_active_low ? IRQF_TRIGGER_FALLING : 351 IRQF_TRIGGER_RISING, 352 "host_wake", bdev); 353 if (err) { 354 bdev->irq = err; 355 goto unlock; 356 } 357 358 bdev->irq_acquired = true; 359 360 device_init_wakeup(bdev->dev, true); 361 362 pm_runtime_set_autosuspend_delay(bdev->dev, 363 BCM_AUTOSUSPEND_DELAY); 364 pm_runtime_use_autosuspend(bdev->dev); 365 pm_runtime_set_active(bdev->dev); 366 pm_runtime_enable(bdev->dev); 367 368 unlock: 369 mutex_unlock(&bcm_device_lock); 370 371 return err; 372 } 373 374 static const struct bcm_set_sleep_mode default_sleep_params = { 375 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ 376 .idle_host = 2, /* idle threshold HOST, in 300ms */ 377 .idle_dev = 2, /* idle threshold device, in 300ms */ 378 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ 379 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ 380 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ 381 .combine_modes = 1, /* Combine sleep and LPM flag */ 382 .tristate_control = 0, /* Allow tri-state control of UART tx flag */ 383 /* Irrelevant USB flags */ 384 .usb_auto_sleep = 0, 385 .usb_resume_timeout = 0, 386 .break_to_host = 0, 387 .pulsed_host_wake = 1, 388 }; 389 390 static int bcm_setup_sleep(struct hci_uart *hu) 391 { 392 struct bcm_data *bcm = hu->priv; 393 struct sk_buff *skb; 394 struct bcm_set_sleep_mode sleep_params = default_sleep_params; 395 396 sleep_params.host_wake_active = !bcm->dev->irq_active_low; 397 398 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), 399 &sleep_params, HCI_INIT_TIMEOUT); 400 if (IS_ERR(skb)) { 401 int err = PTR_ERR(skb); 402 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); 403 return err; 404 } 405 kfree_skb(skb); 406 407 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); 408 409 return 0; 410 } 411 #else 412 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } 413 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } 414 #endif 415 416 static int bcm_set_diag(struct hci_dev *hdev, bool enable) 417 { 418 struct hci_uart *hu = hci_get_drvdata(hdev); 419 struct bcm_data *bcm = hu->priv; 420 struct sk_buff *skb; 421 422 if (!test_bit(HCI_RUNNING, &hdev->flags)) 423 return -ENETDOWN; 424 425 skb = bt_skb_alloc(3, GFP_KERNEL); 426 if (!skb) 427 return -ENOMEM; 428 429 skb_put_u8(skb, BCM_LM_DIAG_PKT); 430 skb_put_u8(skb, 0xf0); 431 skb_put_u8(skb, enable); 432 433 skb_queue_tail(&bcm->txq, skb); 434 hci_uart_tx_wakeup(hu); 435 436 return 0; 437 } 438 439 static int bcm_open(struct hci_uart *hu) 440 { 441 struct bcm_data *bcm; 442 struct list_head *p; 443 int err; 444 445 bt_dev_dbg(hu->hdev, "hu %p", hu); 446 447 if (!hci_uart_has_flow_control(hu)) 448 return -EOPNOTSUPP; 449 450 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); 451 if (!bcm) 452 return -ENOMEM; 453 454 skb_queue_head_init(&bcm->txq); 455 456 hu->priv = bcm; 457 458 mutex_lock(&bcm_device_lock); 459 460 if (hu->serdev) { 461 bcm->dev = serdev_device_get_drvdata(hu->serdev); 462 goto out; 463 } 464 465 if (!hu->tty->dev) 466 goto out; 467 468 list_for_each(p, &bcm_device_list) { 469 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 470 471 /* Retrieve saved bcm_device based on parent of the 472 * platform device (saved during device probe) and 473 * parent of tty device used by hci_uart 474 */ 475 if (hu->tty->dev->parent == dev->dev->parent) { 476 bcm->dev = dev; 477 #ifdef CONFIG_PM 478 dev->hu = hu; 479 #endif 480 break; 481 } 482 } 483 484 out: 485 if (bcm->dev) { 486 if (bcm->dev->use_autobaud_mode) 487 hci_uart_set_flow_control(hu, false); /* Assert BT_UART_CTS_N */ 488 else if (bcm->dev->drive_rts_on_open) 489 hci_uart_set_flow_control(hu, true); 490 491 if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed) 492 hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed); 493 else 494 hu->init_speed = bcm->dev->init_speed; 495 496 /* If oper_speed is set, ldisc/serdev will set the baudrate 497 * before calling setup() 498 */ 499 if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode) 500 hu->oper_speed = bcm->dev->oper_speed; 501 502 err = bcm_gpio_set_power(bcm->dev, true); 503 504 if (bcm->dev->drive_rts_on_open) 505 hci_uart_set_flow_control(hu, false); 506 507 if (err) 508 goto err_unset_hu; 509 } 510 511 mutex_unlock(&bcm_device_lock); 512 return 0; 513 514 err_unset_hu: 515 #ifdef CONFIG_PM 516 if (!hu->serdev) 517 bcm->dev->hu = NULL; 518 #endif 519 mutex_unlock(&bcm_device_lock); 520 hu->priv = NULL; 521 kfree(bcm); 522 return err; 523 } 524 525 static int bcm_close(struct hci_uart *hu) 526 { 527 struct bcm_data *bcm = hu->priv; 528 struct bcm_device *bdev = NULL; 529 int err; 530 531 bt_dev_dbg(hu->hdev, "hu %p", hu); 532 533 /* Protect bcm->dev against removal of the device or driver */ 534 mutex_lock(&bcm_device_lock); 535 536 if (hu->serdev) { 537 bdev = serdev_device_get_drvdata(hu->serdev); 538 } else if (bcm_device_exists(bcm->dev)) { 539 bdev = bcm->dev; 540 #ifdef CONFIG_PM 541 bdev->hu = NULL; 542 #endif 543 } 544 545 if (bdev) { 546 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { 547 devm_free_irq(bdev->dev, bdev->irq, bdev); 548 device_init_wakeup(bdev->dev, false); 549 pm_runtime_disable(bdev->dev); 550 } 551 552 err = bcm_gpio_set_power(bdev, false); 553 if (err) 554 bt_dev_err(hu->hdev, "Failed to power down"); 555 else 556 pm_runtime_set_suspended(bdev->dev); 557 } 558 mutex_unlock(&bcm_device_lock); 559 560 skb_queue_purge(&bcm->txq); 561 kfree_skb(bcm->rx_skb); 562 kfree(bcm); 563 564 hu->priv = NULL; 565 return 0; 566 } 567 568 static int bcm_flush(struct hci_uart *hu) 569 { 570 struct bcm_data *bcm = hu->priv; 571 572 bt_dev_dbg(hu->hdev, "hu %p", hu); 573 574 skb_queue_purge(&bcm->txq); 575 576 return 0; 577 } 578 579 static int bcm_setup(struct hci_uart *hu) 580 { 581 struct bcm_data *bcm = hu->priv; 582 bool fw_load_done = false; 583 bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0); 584 unsigned int speed; 585 int err; 586 587 bt_dev_dbg(hu->hdev, "hu %p", hu); 588 589 hu->hdev->set_diag = bcm_set_diag; 590 hu->hdev->set_bdaddr = btbcm_set_bdaddr; 591 592 err = btbcm_initialize(hu->hdev, &fw_load_done, use_autobaud_mode); 593 if (err) 594 return err; 595 596 if (!fw_load_done) 597 return 0; 598 599 /* Init speed if any */ 600 if (bcm->dev && bcm->dev->init_speed) 601 speed = bcm->dev->init_speed; 602 else if (hu->proto->init_speed) 603 speed = hu->proto->init_speed; 604 else 605 speed = 0; 606 607 if (speed) 608 host_set_baudrate(hu, speed); 609 610 /* Operational speed if any */ 611 if (hu->oper_speed) 612 speed = hu->oper_speed; 613 else if (bcm->dev && bcm->dev->oper_speed) 614 speed = bcm->dev->oper_speed; 615 else if (hu->proto->oper_speed) 616 speed = hu->proto->oper_speed; 617 else 618 speed = 0; 619 620 if (speed) { 621 err = bcm_set_baudrate(hu, speed); 622 if (!err) 623 host_set_baudrate(hu, speed); 624 } 625 626 /* PCM parameters if provided */ 627 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) { 628 struct bcm_set_pcm_int_params params; 629 630 btbcm_read_pcm_int_params(hu->hdev, ¶ms); 631 632 memcpy(¶ms, bcm->dev->pcm_int_params, 5); 633 btbcm_write_pcm_int_params(hu->hdev, ¶ms); 634 } 635 636 err = btbcm_finalize(hu->hdev, &fw_load_done, use_autobaud_mode); 637 if (err) 638 return err; 639 640 /* Some devices ship with the controller default address. 641 * Allow the bootloader to set a valid address through the 642 * device tree. 643 */ 644 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks); 645 646 if (!bcm_request_irq(bcm)) 647 err = bcm_setup_sleep(hu); 648 649 return err; 650 } 651 652 #define BCM_RECV_LM_DIAG \ 653 .type = BCM_LM_DIAG_PKT, \ 654 .hlen = BCM_LM_DIAG_SIZE, \ 655 .loff = 0, \ 656 .lsize = 0, \ 657 .maxlen = BCM_LM_DIAG_SIZE 658 659 #define BCM_RECV_NULL \ 660 .type = BCM_NULL_PKT, \ 661 .hlen = BCM_NULL_SIZE, \ 662 .loff = 0, \ 663 .lsize = 0, \ 664 .maxlen = BCM_NULL_SIZE 665 666 #define BCM_RECV_TYPE49 \ 667 .type = BCM_TYPE49_PKT, \ 668 .hlen = BCM_TYPE49_SIZE, \ 669 .loff = 0, \ 670 .lsize = 0, \ 671 .maxlen = BCM_TYPE49_SIZE 672 673 #define BCM_RECV_TYPE52 \ 674 .type = BCM_TYPE52_PKT, \ 675 .hlen = BCM_TYPE52_SIZE, \ 676 .loff = 0, \ 677 .lsize = 0, \ 678 .maxlen = BCM_TYPE52_SIZE 679 680 static const struct h4_recv_pkt bcm_recv_pkts[] = { 681 { H4_RECV_ACL, .recv = hci_recv_frame }, 682 { H4_RECV_SCO, .recv = hci_recv_frame }, 683 { H4_RECV_EVENT, .recv = hci_recv_frame }, 684 { H4_RECV_ISO, .recv = hci_recv_frame }, 685 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, 686 { BCM_RECV_NULL, .recv = hci_recv_diag }, 687 { BCM_RECV_TYPE49, .recv = hci_recv_diag }, 688 { BCM_RECV_TYPE52, .recv = hci_recv_diag }, 689 }; 690 691 static int bcm_recv(struct hci_uart *hu, const void *data, int count) 692 { 693 struct bcm_data *bcm = hu->priv; 694 695 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 696 return -EUNATCH; 697 698 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, 699 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); 700 if (IS_ERR(bcm->rx_skb)) { 701 int err = PTR_ERR(bcm->rx_skb); 702 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 703 bcm->rx_skb = NULL; 704 return err; 705 } else if (!bcm->rx_skb) { 706 /* Delay auto-suspend when receiving completed packet */ 707 mutex_lock(&bcm_device_lock); 708 if (bcm->dev && bcm_device_exists(bcm->dev)) { 709 pm_runtime_get(bcm->dev->dev); 710 pm_runtime_mark_last_busy(bcm->dev->dev); 711 pm_runtime_put_autosuspend(bcm->dev->dev); 712 } 713 mutex_unlock(&bcm_device_lock); 714 } 715 716 return count; 717 } 718 719 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) 720 { 721 struct bcm_data *bcm = hu->priv; 722 723 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); 724 725 /* Prepend skb with frame type */ 726 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 727 skb_queue_tail(&bcm->txq, skb); 728 729 return 0; 730 } 731 732 static struct sk_buff *bcm_dequeue(struct hci_uart *hu) 733 { 734 struct bcm_data *bcm = hu->priv; 735 struct sk_buff *skb = NULL; 736 struct bcm_device *bdev = NULL; 737 738 mutex_lock(&bcm_device_lock); 739 740 if (bcm_device_exists(bcm->dev)) { 741 bdev = bcm->dev; 742 pm_runtime_get_sync(bdev->dev); 743 /* Shall be resumed here */ 744 } 745 746 skb = skb_dequeue(&bcm->txq); 747 748 if (bdev) { 749 pm_runtime_mark_last_busy(bdev->dev); 750 pm_runtime_put_autosuspend(bdev->dev); 751 } 752 753 mutex_unlock(&bcm_device_lock); 754 755 return skb; 756 } 757 758 #ifdef CONFIG_PM 759 static int bcm_suspend_device(struct device *dev) 760 { 761 struct bcm_device *bdev = dev_get_drvdata(dev); 762 int err; 763 764 bt_dev_dbg(bdev, ""); 765 766 if (!bdev->is_suspended && bdev->hu) { 767 hci_uart_set_flow_control(bdev->hu, true); 768 769 /* Once this returns, driver suspends BT via GPIO */ 770 bdev->is_suspended = true; 771 } 772 773 /* Suspend the device */ 774 err = bdev->set_device_wakeup(bdev, false); 775 if (err) { 776 if (bdev->is_suspended && bdev->hu) { 777 bdev->is_suspended = false; 778 hci_uart_set_flow_control(bdev->hu, false); 779 } 780 return -EBUSY; 781 } 782 783 bt_dev_dbg(bdev, "suspend, delaying 15 ms"); 784 msleep(15); 785 786 return 0; 787 } 788 789 static int bcm_resume_device(struct device *dev) 790 { 791 struct bcm_device *bdev = dev_get_drvdata(dev); 792 int err; 793 794 bt_dev_dbg(bdev, ""); 795 796 err = bdev->set_device_wakeup(bdev, true); 797 if (err) { 798 dev_err(dev, "Failed to power up\n"); 799 return err; 800 } 801 802 bt_dev_dbg(bdev, "resume, delaying 15 ms"); 803 msleep(15); 804 805 /* When this executes, the device has woken up already */ 806 if (bdev->is_suspended && bdev->hu) { 807 bdev->is_suspended = false; 808 809 hci_uart_set_flow_control(bdev->hu, false); 810 } 811 812 return 0; 813 } 814 #endif 815 816 #ifdef CONFIG_PM_SLEEP 817 /* suspend callback */ 818 static int bcm_suspend(struct device *dev) 819 { 820 struct bcm_device *bdev = dev_get_drvdata(dev); 821 int error; 822 823 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); 824 825 /* 826 * When used with a device instantiated as platform_device, bcm_suspend 827 * can be called at any time as long as the platform device is bound, 828 * so it should use bcm_device_lock to protect access to hci_uart 829 * and device_wake-up GPIO. 830 */ 831 mutex_lock(&bcm_device_lock); 832 833 if (!bdev->hu) 834 goto unlock; 835 836 if (pm_runtime_active(dev)) 837 bcm_suspend_device(dev); 838 839 if (device_may_wakeup(dev) && bdev->irq > 0) { 840 error = enable_irq_wake(bdev->irq); 841 if (!error) 842 bt_dev_dbg(bdev, "BCM irq: enabled"); 843 } 844 845 unlock: 846 mutex_unlock(&bcm_device_lock); 847 848 return 0; 849 } 850 851 /* resume callback */ 852 static int bcm_resume(struct device *dev) 853 { 854 struct bcm_device *bdev = dev_get_drvdata(dev); 855 int err = 0; 856 857 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); 858 859 /* 860 * When used with a device instantiated as platform_device, bcm_resume 861 * can be called at any time as long as platform device is bound, 862 * so it should use bcm_device_lock to protect access to hci_uart 863 * and device_wake-up GPIO. 864 */ 865 mutex_lock(&bcm_device_lock); 866 867 if (!bdev->hu) 868 goto unlock; 869 870 if (device_may_wakeup(dev) && bdev->irq > 0) { 871 disable_irq_wake(bdev->irq); 872 bt_dev_dbg(bdev, "BCM irq: disabled"); 873 } 874 875 err = bcm_resume_device(dev); 876 877 unlock: 878 mutex_unlock(&bcm_device_lock); 879 880 if (!err) { 881 pm_runtime_disable(dev); 882 pm_runtime_set_active(dev); 883 pm_runtime_enable(dev); 884 } 885 886 return 0; 887 } 888 #endif 889 890 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ 891 static struct gpiod_lookup_table asus_tf103c_irq_gpios = { 892 .dev_id = "serial0-0", 893 .table = { 894 GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH), 895 { } 896 }, 897 }; 898 899 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { 900 { 901 .ident = "Asus TF103C", 902 .matches = { 903 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 904 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), 905 }, 906 .driver_data = &asus_tf103c_irq_gpios, 907 }, 908 { 909 .ident = "Meegopad T08", 910 .matches = { 911 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, 912 "To be filled by OEM."), 913 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), 914 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), 915 }, 916 }, 917 { } 918 }; 919 920 #ifdef CONFIG_ACPI 921 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 922 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 923 static const struct acpi_gpio_params third_gpio = { 2, 0, false }; 924 925 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { 926 { "device-wakeup-gpios", &first_gpio, 1 }, 927 { "shutdown-gpios", &second_gpio, 1 }, 928 { "host-wakeup-gpios", &third_gpio, 1 }, 929 { }, 930 }; 931 932 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { 933 { "host-wakeup-gpios", &first_gpio, 1 }, 934 { "device-wakeup-gpios", &second_gpio, 1 }, 935 { "shutdown-gpios", &third_gpio, 1 }, 936 { }, 937 }; 938 939 static int bcm_resource(struct acpi_resource *ares, void *data) 940 { 941 struct bcm_device *dev = data; 942 struct acpi_resource_extended_irq *irq; 943 struct acpi_resource_gpio *gpio; 944 struct acpi_resource_uart_serialbus *sb; 945 946 switch (ares->type) { 947 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 948 irq = &ares->data.extended_irq; 949 if (irq->polarity != ACPI_ACTIVE_LOW) 950 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); 951 dev->irq_active_low = true; 952 break; 953 954 case ACPI_RESOURCE_TYPE_GPIO: 955 gpio = &ares->data.gpio; 956 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 957 dev->gpio_int_idx = dev->gpio_count; 958 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; 959 } 960 dev->gpio_count++; 961 break; 962 963 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 964 sb = &ares->data.uart_serial_bus; 965 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { 966 dev->init_speed = sb->default_baud_rate; 967 dev->oper_speed = 4000000; 968 } 969 break; 970 971 default: 972 break; 973 } 974 975 return 0; 976 } 977 978 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) 979 { 980 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) 981 return -EIO; 982 983 return 0; 984 } 985 986 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) 987 { 988 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, 989 NULL, NULL, NULL))) 990 return -EIO; 991 992 return 0; 993 } 994 995 static int bcm_apple_get_resources(struct bcm_device *dev) 996 { 997 struct acpi_device *adev = ACPI_COMPANION(dev->dev); 998 const union acpi_object *obj; 999 1000 if (!adev || 1001 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || 1002 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || 1003 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) 1004 return -ENODEV; 1005 1006 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && 1007 obj->buffer.length == 8) 1008 dev->init_speed = *(u64 *)obj->buffer.pointer; 1009 1010 dev->set_device_wakeup = bcm_apple_set_device_wakeup; 1011 dev->set_shutdown = bcm_apple_set_shutdown; 1012 1013 return 0; 1014 } 1015 #else 1016 static inline int bcm_apple_get_resources(struct bcm_device *dev) 1017 { 1018 return -EOPNOTSUPP; 1019 } 1020 #endif /* CONFIG_ACPI */ 1021 1022 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) 1023 { 1024 gpiod_set_value_cansleep(dev->device_wakeup, awake); 1025 return 0; 1026 } 1027 1028 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) 1029 { 1030 gpiod_set_value_cansleep(dev->shutdown, powered); 1031 if (dev->reset) 1032 /* 1033 * The reset line is asserted on powerdown and deasserted 1034 * on poweron so the inverse of powered is used. Notice 1035 * that the GPIO line BT_RST_N needs to be specified as 1036 * active low in the device tree or similar system 1037 * description. 1038 */ 1039 gpiod_set_value_cansleep(dev->reset, !powered); 1040 return 0; 1041 } 1042 1043 /* Try a bunch of names for TXCO */ 1044 static struct clk *bcm_get_txco(struct device *dev) 1045 { 1046 struct clk *clk; 1047 1048 /* New explicit name */ 1049 clk = devm_clk_get(dev, "txco"); 1050 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1051 return clk; 1052 1053 /* Deprecated name */ 1054 clk = devm_clk_get(dev, "extclk"); 1055 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1056 return clk; 1057 1058 /* Original code used no name at all */ 1059 return devm_clk_get(dev, NULL); 1060 } 1061 1062 static int bcm_get_resources(struct bcm_device *dev) 1063 { 1064 const struct dmi_system_id *broken_irq_dmi_id; 1065 const char *irq_con_id = "host-wakeup"; 1066 int err; 1067 1068 dev->name = dev_name(dev->dev); 1069 1070 if (x86_apple_machine && !bcm_apple_get_resources(dev)) 1071 return 0; 1072 1073 dev->txco_clk = bcm_get_txco(dev->dev); 1074 1075 /* Handle deferred probing */ 1076 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) 1077 return PTR_ERR(dev->txco_clk); 1078 1079 /* Ignore all other errors as before */ 1080 if (IS_ERR(dev->txco_clk)) 1081 dev->txco_clk = NULL; 1082 1083 dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); 1084 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) 1085 return PTR_ERR(dev->lpo_clk); 1086 1087 if (IS_ERR(dev->lpo_clk)) 1088 dev->lpo_clk = NULL; 1089 1090 /* Check if we accidentally fetched the lpo clock twice */ 1091 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { 1092 devm_clk_put(dev->dev, dev->txco_clk); 1093 dev->txco_clk = NULL; 1094 } 1095 1096 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", 1097 GPIOD_OUT_LOW); 1098 if (IS_ERR(dev->device_wakeup)) 1099 return PTR_ERR(dev->device_wakeup); 1100 1101 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", 1102 GPIOD_OUT_LOW); 1103 if (IS_ERR(dev->shutdown)) 1104 return PTR_ERR(dev->shutdown); 1105 1106 dev->reset = devm_gpiod_get_optional(dev->dev, "reset", 1107 GPIOD_OUT_LOW); 1108 if (IS_ERR(dev->reset)) 1109 return PTR_ERR(dev->reset); 1110 1111 dev->set_device_wakeup = bcm_gpio_set_device_wakeup; 1112 dev->set_shutdown = bcm_gpio_set_shutdown; 1113 1114 dev->supplies[0].supply = "vbat"; 1115 dev->supplies[1].supply = "vddio"; 1116 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, 1117 dev->supplies); 1118 if (err) 1119 return err; 1120 1121 broken_irq_dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); 1122 if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) { 1123 gpiod_add_lookup_table(broken_irq_dmi_id->driver_data); 1124 irq_con_id = "host-wakeup-alt"; 1125 dev->irq_active_low = false; 1126 dev->irq = 0; 1127 } 1128 1129 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ 1130 if (dev->irq <= 0) { 1131 struct gpio_desc *gpio; 1132 1133 gpio = devm_gpiod_get_optional(dev->dev, irq_con_id, GPIOD_IN); 1134 if (IS_ERR(gpio)) 1135 return PTR_ERR(gpio); 1136 1137 dev->irq = gpiod_to_irq(gpio); 1138 } 1139 1140 if (broken_irq_dmi_id) { 1141 if (broken_irq_dmi_id->driver_data) { 1142 gpiod_remove_lookup_table(broken_irq_dmi_id->driver_data); 1143 } else { 1144 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", 1145 broken_irq_dmi_id->ident); 1146 dev->irq = 0; 1147 } 1148 } 1149 1150 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); 1151 return 0; 1152 } 1153 1154 #ifdef CONFIG_ACPI 1155 static int bcm_acpi_probe(struct bcm_device *dev) 1156 { 1157 LIST_HEAD(resources); 1158 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; 1159 struct resource_entry *entry; 1160 int ret; 1161 1162 /* Retrieve UART ACPI info */ 1163 dev->gpio_int_idx = -1; 1164 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), 1165 &resources, bcm_resource, dev); 1166 if (ret < 0) 1167 return ret; 1168 1169 resource_list_for_each_entry(entry, &resources) { 1170 if (resource_type(entry->res) == IORESOURCE_IRQ) { 1171 dev->irq = entry->res->start; 1172 break; 1173 } 1174 } 1175 acpi_dev_free_resource_list(&resources); 1176 1177 /* If the DSDT uses an Interrupt resource for the IRQ, then there are 1178 * only 2 GPIO resources, we use the irq-last mapping for this, since 1179 * we already have an irq the 3th / last mapping will not be used. 1180 */ 1181 if (dev->irq) 1182 gpio_mapping = acpi_bcm_int_last_gpios; 1183 else if (dev->gpio_int_idx == 0) 1184 gpio_mapping = acpi_bcm_int_first_gpios; 1185 else if (dev->gpio_int_idx == 2) 1186 gpio_mapping = acpi_bcm_int_last_gpios; 1187 else 1188 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", 1189 dev->gpio_int_idx); 1190 1191 /* Warn if our expectations are not met. */ 1192 if (dev->gpio_count != (dev->irq ? 2 : 3)) 1193 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", 1194 dev->gpio_count); 1195 1196 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); 1197 if (ret) 1198 return ret; 1199 1200 if (irq_polarity != -1) { 1201 dev->irq_active_low = irq_polarity; 1202 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", 1203 dev->irq_active_low ? "low" : "high"); 1204 } 1205 1206 return 0; 1207 } 1208 #else 1209 static int bcm_acpi_probe(struct bcm_device *dev) 1210 { 1211 return -EINVAL; 1212 } 1213 #endif /* CONFIG_ACPI */ 1214 1215 static int bcm_of_probe(struct bcm_device *bdev) 1216 { 1217 bdev->use_autobaud_mode = device_property_read_bool(bdev->dev, 1218 "brcm,requires-autobaud-mode"); 1219 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); 1220 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params", 1221 bdev->pcm_int_params, 5); 1222 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup"); 1223 bdev->irq_active_low = irq_get_trigger_type(bdev->irq) 1224 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW); 1225 return 0; 1226 } 1227 1228 static int bcm_probe(struct platform_device *pdev) 1229 { 1230 struct bcm_device *dev; 1231 int ret; 1232 1233 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 1234 if (!dev) 1235 return -ENOMEM; 1236 1237 dev->dev = &pdev->dev; 1238 1239 ret = platform_get_irq(pdev, 0); 1240 if (ret < 0) 1241 return ret; 1242 1243 dev->irq = ret; 1244 1245 /* Initialize routing field to an unused value */ 1246 dev->pcm_int_params[0] = 0xff; 1247 1248 if (has_acpi_companion(&pdev->dev)) { 1249 ret = bcm_acpi_probe(dev); 1250 if (ret) 1251 return ret; 1252 } 1253 1254 ret = bcm_get_resources(dev); 1255 if (ret) 1256 return ret; 1257 1258 platform_set_drvdata(pdev, dev); 1259 1260 dev_info(&pdev->dev, "%s device registered.\n", dev->name); 1261 1262 /* Place this instance on the device list */ 1263 mutex_lock(&bcm_device_lock); 1264 list_add_tail(&dev->list, &bcm_device_list); 1265 mutex_unlock(&bcm_device_lock); 1266 1267 ret = bcm_gpio_set_power(dev, false); 1268 if (ret) 1269 dev_err(&pdev->dev, "Failed to power down\n"); 1270 1271 return 0; 1272 } 1273 1274 static int bcm_remove(struct platform_device *pdev) 1275 { 1276 struct bcm_device *dev = platform_get_drvdata(pdev); 1277 1278 mutex_lock(&bcm_device_lock); 1279 list_del(&dev->list); 1280 mutex_unlock(&bcm_device_lock); 1281 1282 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); 1283 1284 return 0; 1285 } 1286 1287 static const struct hci_uart_proto bcm_proto = { 1288 .id = HCI_UART_BCM, 1289 .name = "Broadcom", 1290 .manufacturer = 15, 1291 .init_speed = 115200, 1292 .open = bcm_open, 1293 .close = bcm_close, 1294 .flush = bcm_flush, 1295 .setup = bcm_setup, 1296 .set_baudrate = bcm_set_baudrate, 1297 .recv = bcm_recv, 1298 .enqueue = bcm_enqueue, 1299 .dequeue = bcm_dequeue, 1300 }; 1301 1302 #ifdef CONFIG_ACPI 1303 static const struct acpi_device_id bcm_acpi_match[] = { 1304 { "BCM2E00" }, 1305 { "BCM2E01" }, 1306 { "BCM2E02" }, 1307 { "BCM2E03" }, 1308 { "BCM2E04" }, 1309 { "BCM2E05" }, 1310 { "BCM2E06" }, 1311 { "BCM2E07" }, 1312 { "BCM2E08" }, 1313 { "BCM2E09" }, 1314 { "BCM2E0A" }, 1315 { "BCM2E0B" }, 1316 { "BCM2E0C" }, 1317 { "BCM2E0D" }, 1318 { "BCM2E0E" }, 1319 { "BCM2E0F" }, 1320 { "BCM2E10" }, 1321 { "BCM2E11" }, 1322 { "BCM2E12" }, 1323 { "BCM2E13" }, 1324 { "BCM2E14" }, 1325 { "BCM2E15" }, 1326 { "BCM2E16" }, 1327 { "BCM2E17" }, 1328 { "BCM2E18" }, 1329 { "BCM2E19" }, 1330 { "BCM2E1A" }, 1331 { "BCM2E1B" }, 1332 { "BCM2E1C" }, 1333 { "BCM2E1D" }, 1334 { "BCM2E1F" }, 1335 { "BCM2E20" }, 1336 { "BCM2E21" }, 1337 { "BCM2E22" }, 1338 { "BCM2E23" }, 1339 { "BCM2E24" }, 1340 { "BCM2E25" }, 1341 { "BCM2E26" }, 1342 { "BCM2E27" }, 1343 { "BCM2E28" }, 1344 { "BCM2E29" }, 1345 { "BCM2E2A" }, 1346 { "BCM2E2B" }, 1347 { "BCM2E2C" }, 1348 { "BCM2E2D" }, 1349 { "BCM2E2E" }, 1350 { "BCM2E2F" }, 1351 { "BCM2E30" }, 1352 { "BCM2E31" }, 1353 { "BCM2E32" }, 1354 { "BCM2E33" }, 1355 { "BCM2E34" }, 1356 { "BCM2E35" }, 1357 { "BCM2E36" }, 1358 { "BCM2E37" }, 1359 { "BCM2E38" }, 1360 { "BCM2E39" }, 1361 { "BCM2E3A" }, 1362 { "BCM2E3B" }, 1363 { "BCM2E3C" }, 1364 { "BCM2E3D" }, 1365 { "BCM2E3E" }, 1366 { "BCM2E3F" }, 1367 { "BCM2E40" }, 1368 { "BCM2E41" }, 1369 { "BCM2E42" }, 1370 { "BCM2E43" }, 1371 { "BCM2E44" }, 1372 { "BCM2E45" }, 1373 { "BCM2E46" }, 1374 { "BCM2E47" }, 1375 { "BCM2E48" }, 1376 { "BCM2E49" }, 1377 { "BCM2E4A" }, 1378 { "BCM2E4B" }, 1379 { "BCM2E4C" }, 1380 { "BCM2E4D" }, 1381 { "BCM2E4E" }, 1382 { "BCM2E4F" }, 1383 { "BCM2E50" }, 1384 { "BCM2E51" }, 1385 { "BCM2E52" }, 1386 { "BCM2E53" }, 1387 { "BCM2E54" }, 1388 { "BCM2E55" }, 1389 { "BCM2E56" }, 1390 { "BCM2E57" }, 1391 { "BCM2E58" }, 1392 { "BCM2E59" }, 1393 { "BCM2E5A" }, 1394 { "BCM2E5B" }, 1395 { "BCM2E5C" }, 1396 { "BCM2E5D" }, 1397 { "BCM2E5E" }, 1398 { "BCM2E5F" }, 1399 { "BCM2E60" }, 1400 { "BCM2E61" }, 1401 { "BCM2E62" }, 1402 { "BCM2E63" }, 1403 { "BCM2E64" }, 1404 { "BCM2E65" }, 1405 { "BCM2E66" }, 1406 { "BCM2E67" }, 1407 { "BCM2E68" }, 1408 { "BCM2E69" }, 1409 { "BCM2E6B" }, 1410 { "BCM2E6D" }, 1411 { "BCM2E6E" }, 1412 { "BCM2E6F" }, 1413 { "BCM2E70" }, 1414 { "BCM2E71" }, 1415 { "BCM2E72" }, 1416 { "BCM2E73" }, 1417 { "BCM2E74" }, 1418 { "BCM2E75" }, 1419 { "BCM2E76" }, 1420 { "BCM2E77" }, 1421 { "BCM2E78" }, 1422 { "BCM2E79" }, 1423 { "BCM2E7A" }, 1424 { "BCM2E7B" }, 1425 { "BCM2E7C" }, 1426 { "BCM2E7D" }, 1427 { "BCM2E7E" }, 1428 { "BCM2E7F" }, 1429 { "BCM2E80" }, 1430 { "BCM2E81" }, 1431 { "BCM2E82" }, 1432 { "BCM2E83" }, 1433 { "BCM2E84" }, 1434 { "BCM2E85" }, 1435 { "BCM2E86" }, 1436 { "BCM2E87" }, 1437 { "BCM2E88" }, 1438 { "BCM2E89" }, 1439 { "BCM2E8A" }, 1440 { "BCM2E8B" }, 1441 { "BCM2E8C" }, 1442 { "BCM2E8D" }, 1443 { "BCM2E8E" }, 1444 { "BCM2E90" }, 1445 { "BCM2E92" }, 1446 { "BCM2E93" }, 1447 { "BCM2E94" }, 1448 { "BCM2E95" }, 1449 { "BCM2E96" }, 1450 { "BCM2E97" }, 1451 { "BCM2E98" }, 1452 { "BCM2E99" }, 1453 { "BCM2E9A" }, 1454 { "BCM2E9B" }, 1455 { "BCM2E9C" }, 1456 { "BCM2E9D" }, 1457 { "BCM2EA0" }, 1458 { "BCM2EA1" }, 1459 { "BCM2EA2" }, 1460 { "BCM2EA3" }, 1461 { "BCM2EA4" }, 1462 { "BCM2EA5" }, 1463 { "BCM2EA6" }, 1464 { "BCM2EA7" }, 1465 { "BCM2EA8" }, 1466 { "BCM2EA9" }, 1467 { "BCM2EAA" }, 1468 { "BCM2EAB" }, 1469 { "BCM2EAC" }, 1470 { }, 1471 }; 1472 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); 1473 #endif 1474 1475 /* suspend and resume callbacks */ 1476 static const struct dev_pm_ops bcm_pm_ops = { 1477 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) 1478 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) 1479 }; 1480 1481 static struct platform_driver bcm_driver = { 1482 .probe = bcm_probe, 1483 .remove = bcm_remove, 1484 .driver = { 1485 .name = "hci_bcm", 1486 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1487 .pm = &bcm_pm_ops, 1488 }, 1489 }; 1490 1491 static int bcm_serdev_probe(struct serdev_device *serdev) 1492 { 1493 struct bcm_device *bcmdev; 1494 const struct bcm_device_data *data; 1495 int err; 1496 1497 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); 1498 if (!bcmdev) 1499 return -ENOMEM; 1500 1501 bcmdev->dev = &serdev->dev; 1502 #ifdef CONFIG_PM 1503 bcmdev->hu = &bcmdev->serdev_hu; 1504 #endif 1505 bcmdev->serdev_hu.serdev = serdev; 1506 serdev_device_set_drvdata(serdev, bcmdev); 1507 1508 /* Initialize routing field to an unused value */ 1509 bcmdev->pcm_int_params[0] = 0xff; 1510 1511 if (has_acpi_companion(&serdev->dev)) 1512 err = bcm_acpi_probe(bcmdev); 1513 else 1514 err = bcm_of_probe(bcmdev); 1515 if (err) 1516 return err; 1517 1518 err = bcm_get_resources(bcmdev); 1519 if (err) 1520 return err; 1521 1522 if (!bcmdev->shutdown) { 1523 dev_warn(&serdev->dev, 1524 "No reset resource, using default baud rate\n"); 1525 bcmdev->oper_speed = bcmdev->init_speed; 1526 } 1527 1528 err = bcm_gpio_set_power(bcmdev, false); 1529 if (err) 1530 dev_err(&serdev->dev, "Failed to power down\n"); 1531 1532 data = device_get_match_data(bcmdev->dev); 1533 if (data) { 1534 bcmdev->max_autobaud_speed = data->max_autobaud_speed; 1535 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; 1536 bcmdev->drive_rts_on_open = data->drive_rts_on_open; 1537 bcmdev->no_uart_clock_set = data->no_uart_clock_set; 1538 } 1539 1540 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); 1541 } 1542 1543 static void bcm_serdev_remove(struct serdev_device *serdev) 1544 { 1545 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); 1546 1547 hci_uart_unregister_device(&bcmdev->serdev_hu); 1548 } 1549 1550 #ifdef CONFIG_OF 1551 static struct bcm_device_data bcm4354_device_data = { 1552 .no_early_set_baudrate = true, 1553 }; 1554 1555 static struct bcm_device_data bcm43438_device_data = { 1556 .drive_rts_on_open = true, 1557 }; 1558 1559 static struct bcm_device_data cyw4373a0_device_data = { 1560 .no_uart_clock_set = true, 1561 }; 1562 1563 static struct bcm_device_data cyw55572_device_data = { 1564 .max_autobaud_speed = 921600, 1565 }; 1566 1567 static const struct of_device_id bcm_bluetooth_of_match[] = { 1568 { .compatible = "brcm,bcm20702a1" }, 1569 { .compatible = "brcm,bcm4329-bt" }, 1570 { .compatible = "brcm,bcm4330-bt" }, 1571 { .compatible = "brcm,bcm4334-bt" }, 1572 { .compatible = "brcm,bcm4345c5" }, 1573 { .compatible = "brcm,bcm43430a0-bt" }, 1574 { .compatible = "brcm,bcm43430a1-bt" }, 1575 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, 1576 { .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data }, 1577 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, 1578 { .compatible = "brcm,bcm4335a0" }, 1579 { .compatible = "cypress,cyw4373a0-bt", .data = &cyw4373a0_device_data }, 1580 { .compatible = "infineon,cyw55572-bt", .data = &cyw55572_device_data }, 1581 { }, 1582 }; 1583 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); 1584 #endif 1585 1586 static struct serdev_device_driver bcm_serdev_driver = { 1587 .probe = bcm_serdev_probe, 1588 .remove = bcm_serdev_remove, 1589 .driver = { 1590 .name = "hci_uart_bcm", 1591 .of_match_table = of_match_ptr(bcm_bluetooth_of_match), 1592 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1593 .pm = &bcm_pm_ops, 1594 }, 1595 }; 1596 1597 int __init bcm_init(void) 1598 { 1599 /* For now, we need to keep both platform device 1600 * driver (ACPI generated) and serdev driver (DT). 1601 */ 1602 platform_driver_register(&bcm_driver); 1603 serdev_device_driver_register(&bcm_serdev_driver); 1604 1605 return hci_uart_register_proto(&bcm_proto); 1606 } 1607 1608 int __exit bcm_deinit(void) 1609 { 1610 platform_driver_unregister(&bcm_driver); 1611 serdev_device_driver_unregister(&bcm_serdev_driver); 1612 1613 return hci_uart_unregister_proto(&bcm_proto); 1614 } 1615