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 * @max_autobaud_speed: max baudrate supported by device in autobaud mode 57 */ 58 struct bcm_device_data { 59 bool no_early_set_baudrate; 60 bool drive_rts_on_open; 61 u32 max_autobaud_speed; 62 }; 63 64 /** 65 * struct bcm_device - device driver resources 66 * @serdev_hu: HCI UART controller struct 67 * @list: bcm_device_list node 68 * @dev: physical UART slave 69 * @name: device name logged by bt_dev_*() functions 70 * @device_wakeup: BT_WAKE pin, 71 * assert = Bluetooth device must wake up or remain awake, 72 * deassert = Bluetooth device may sleep when sleep criteria are met 73 * @shutdown: BT_REG_ON pin, 74 * power up or power down Bluetooth device internal regulators 75 * @reset: BT_RST_N pin, 76 * active low resets the Bluetooth logic core 77 * @set_device_wakeup: callback to toggle BT_WAKE pin 78 * either by accessing @device_wakeup or by calling @btlp 79 * @set_shutdown: callback to toggle BT_REG_ON pin 80 * either by accessing @shutdown or by calling @btpu/@btpd 81 * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") 82 * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") 83 * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") 84 * @gpio_count: internal counter for GPIO resources associated with ACPI device 85 * @gpio_int_idx: index in _CRS for GpioInt() resource 86 * @txco_clk: external reference frequency clock used by Bluetooth device 87 * @lpo_clk: external LPO clock used by Bluetooth device 88 * @supplies: VBAT and VDDIO supplies used by Bluetooth device 89 * @res_enabled: whether clocks and supplies are prepared and enabled 90 * @init_speed: default baudrate of Bluetooth device; 91 * the host UART is initially set to this baudrate so that 92 * it can configure the Bluetooth device for @oper_speed 93 * @oper_speed: preferred baudrate of Bluetooth device; 94 * set to 0 if @init_speed is already the preferred baudrate 95 * @irq: interrupt triggered by HOST_WAKE_BT pin 96 * @irq_active_low: whether @irq is active low 97 * @irq_acquired: flag to show if IRQ handler has been assigned 98 * @hu: pointer to HCI UART controller struct, 99 * used to disable flow control during runtime suspend and system sleep 100 * @is_suspended: whether flow control is currently disabled 101 * @no_early_set_baudrate: don't set_baudrate before setup() 102 * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it 103 * @pcm_int_params: keep the initial PCM configuration 104 * @use_autobaud_mode: start Bluetooth device in autobaud mode 105 * @max_autobaud_speed: max baudrate supported by device in autobaud mode 106 */ 107 struct bcm_device { 108 /* Must be the first member, hci_serdev.c expects this. */ 109 struct hci_uart serdev_hu; 110 struct list_head list; 111 112 struct device *dev; 113 114 const char *name; 115 struct gpio_desc *device_wakeup; 116 struct gpio_desc *shutdown; 117 struct gpio_desc *reset; 118 int (*set_device_wakeup)(struct bcm_device *, bool); 119 int (*set_shutdown)(struct bcm_device *, bool); 120 #ifdef CONFIG_ACPI 121 acpi_handle btlp, btpu, btpd; 122 int gpio_count; 123 int gpio_int_idx; 124 #endif 125 126 struct clk *txco_clk; 127 struct clk *lpo_clk; 128 struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; 129 bool res_enabled; 130 131 u32 init_speed; 132 u32 oper_speed; 133 int irq; 134 bool irq_active_low; 135 bool irq_acquired; 136 137 #ifdef CONFIG_PM 138 struct hci_uart *hu; 139 bool is_suspended; 140 #endif 141 bool no_early_set_baudrate; 142 bool drive_rts_on_open; 143 bool use_autobaud_mode; 144 u8 pcm_int_params[5]; 145 u32 max_autobaud_speed; 146 }; 147 148 /* generic bcm uart resources */ 149 struct bcm_data { 150 struct sk_buff *rx_skb; 151 struct sk_buff_head txq; 152 153 struct bcm_device *dev; 154 }; 155 156 /* List of BCM BT UART devices */ 157 static DEFINE_MUTEX(bcm_device_lock); 158 static LIST_HEAD(bcm_device_list); 159 160 static int irq_polarity = -1; 161 module_param(irq_polarity, int, 0444); 162 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); 163 164 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 165 { 166 if (hu->serdev) 167 serdev_device_set_baudrate(hu->serdev, speed); 168 else 169 hci_uart_set_baudrate(hu, speed); 170 } 171 172 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) 173 { 174 struct hci_dev *hdev = hu->hdev; 175 struct sk_buff *skb; 176 struct bcm_update_uart_baud_rate param; 177 178 if (speed > 3000000) { 179 struct bcm_write_uart_clock_setting clock; 180 181 clock.type = BCM_UART_CLOCK_48MHZ; 182 183 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); 184 185 /* This Broadcom specific command changes the UART's controller 186 * clock for baud rate > 3000000. 187 */ 188 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); 189 if (IS_ERR(skb)) { 190 int err = PTR_ERR(skb); 191 bt_dev_err(hdev, "BCM: failed to write clock (%d)", 192 err); 193 return err; 194 } 195 196 kfree_skb(skb); 197 } 198 199 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); 200 201 param.zero = cpu_to_le16(0); 202 param.baud_rate = cpu_to_le32(speed); 203 204 /* This Broadcom specific command changes the UART's controller baud 205 * rate. 206 */ 207 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, 208 HCI_INIT_TIMEOUT); 209 if (IS_ERR(skb)) { 210 int err = PTR_ERR(skb); 211 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", 212 err); 213 return err; 214 } 215 216 kfree_skb(skb); 217 218 return 0; 219 } 220 221 /* bcm_device_exists should be protected by bcm_device_lock */ 222 static bool bcm_device_exists(struct bcm_device *device) 223 { 224 struct list_head *p; 225 226 #ifdef CONFIG_PM 227 /* Devices using serdev always exist */ 228 if (device && device->hu && device->hu->serdev) 229 return true; 230 #endif 231 232 list_for_each(p, &bcm_device_list) { 233 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 234 235 if (device == dev) 236 return true; 237 } 238 239 return false; 240 } 241 242 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) 243 { 244 int err; 245 246 if (powered && !dev->res_enabled) { 247 /* Intel Macs use bcm_apple_get_resources() and don't 248 * have regulator supplies configured. 249 */ 250 if (dev->supplies[0].supply) { 251 err = regulator_bulk_enable(BCM_NUM_SUPPLIES, 252 dev->supplies); 253 if (err) 254 return err; 255 } 256 257 /* LPO clock needs to be 32.768 kHz */ 258 err = clk_set_rate(dev->lpo_clk, 32768); 259 if (err) { 260 dev_err(dev->dev, "Could not set LPO clock rate\n"); 261 goto err_regulator_disable; 262 } 263 264 err = clk_prepare_enable(dev->lpo_clk); 265 if (err) 266 goto err_regulator_disable; 267 268 err = clk_prepare_enable(dev->txco_clk); 269 if (err) 270 goto err_lpo_clk_disable; 271 } 272 273 err = dev->set_shutdown(dev, powered); 274 if (err) 275 goto err_txco_clk_disable; 276 277 err = dev->set_device_wakeup(dev, powered); 278 if (err) 279 goto err_revert_shutdown; 280 281 if (!powered && dev->res_enabled) { 282 clk_disable_unprepare(dev->txco_clk); 283 clk_disable_unprepare(dev->lpo_clk); 284 285 /* Intel Macs use bcm_apple_get_resources() and don't 286 * have regulator supplies configured. 287 */ 288 if (dev->supplies[0].supply) 289 regulator_bulk_disable(BCM_NUM_SUPPLIES, 290 dev->supplies); 291 } 292 293 /* wait for device to power on and come out of reset */ 294 usleep_range(100000, 120000); 295 296 dev->res_enabled = powered; 297 298 return 0; 299 300 err_revert_shutdown: 301 dev->set_shutdown(dev, !powered); 302 err_txco_clk_disable: 303 if (powered && !dev->res_enabled) 304 clk_disable_unprepare(dev->txco_clk); 305 err_lpo_clk_disable: 306 if (powered && !dev->res_enabled) 307 clk_disable_unprepare(dev->lpo_clk); 308 err_regulator_disable: 309 if (powered && !dev->res_enabled) 310 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); 311 return err; 312 } 313 314 #ifdef CONFIG_PM 315 static irqreturn_t bcm_host_wake(int irq, void *data) 316 { 317 struct bcm_device *bdev = data; 318 319 bt_dev_dbg(bdev, "Host wake IRQ"); 320 321 pm_runtime_get(bdev->dev); 322 pm_runtime_mark_last_busy(bdev->dev); 323 pm_runtime_put_autosuspend(bdev->dev); 324 325 return IRQ_HANDLED; 326 } 327 328 static int bcm_request_irq(struct bcm_data *bcm) 329 { 330 struct bcm_device *bdev = bcm->dev; 331 int err; 332 333 mutex_lock(&bcm_device_lock); 334 if (!bcm_device_exists(bdev)) { 335 err = -ENODEV; 336 goto unlock; 337 } 338 339 if (bdev->irq <= 0) { 340 err = -EOPNOTSUPP; 341 goto unlock; 342 } 343 344 err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, 345 bdev->irq_active_low ? IRQF_TRIGGER_FALLING : 346 IRQF_TRIGGER_RISING, 347 "host_wake", bdev); 348 if (err) { 349 bdev->irq = err; 350 goto unlock; 351 } 352 353 bdev->irq_acquired = true; 354 355 device_init_wakeup(bdev->dev, true); 356 357 pm_runtime_set_autosuspend_delay(bdev->dev, 358 BCM_AUTOSUSPEND_DELAY); 359 pm_runtime_use_autosuspend(bdev->dev); 360 pm_runtime_set_active(bdev->dev); 361 pm_runtime_enable(bdev->dev); 362 363 unlock: 364 mutex_unlock(&bcm_device_lock); 365 366 return err; 367 } 368 369 static const struct bcm_set_sleep_mode default_sleep_params = { 370 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ 371 .idle_host = 2, /* idle threshold HOST, in 300ms */ 372 .idle_dev = 2, /* idle threshold device, in 300ms */ 373 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ 374 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ 375 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ 376 .combine_modes = 1, /* Combine sleep and LPM flag */ 377 .tristate_control = 0, /* Allow tri-state control of UART tx flag */ 378 /* Irrelevant USB flags */ 379 .usb_auto_sleep = 0, 380 .usb_resume_timeout = 0, 381 .break_to_host = 0, 382 .pulsed_host_wake = 1, 383 }; 384 385 static int bcm_setup_sleep(struct hci_uart *hu) 386 { 387 struct bcm_data *bcm = hu->priv; 388 struct sk_buff *skb; 389 struct bcm_set_sleep_mode sleep_params = default_sleep_params; 390 391 sleep_params.host_wake_active = !bcm->dev->irq_active_low; 392 393 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), 394 &sleep_params, HCI_INIT_TIMEOUT); 395 if (IS_ERR(skb)) { 396 int err = PTR_ERR(skb); 397 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); 398 return err; 399 } 400 kfree_skb(skb); 401 402 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); 403 404 return 0; 405 } 406 #else 407 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } 408 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } 409 #endif 410 411 static int bcm_set_diag(struct hci_dev *hdev, bool enable) 412 { 413 struct hci_uart *hu = hci_get_drvdata(hdev); 414 struct bcm_data *bcm = hu->priv; 415 struct sk_buff *skb; 416 417 if (!test_bit(HCI_RUNNING, &hdev->flags)) 418 return -ENETDOWN; 419 420 skb = bt_skb_alloc(3, GFP_KERNEL); 421 if (!skb) 422 return -ENOMEM; 423 424 skb_put_u8(skb, BCM_LM_DIAG_PKT); 425 skb_put_u8(skb, 0xf0); 426 skb_put_u8(skb, enable); 427 428 skb_queue_tail(&bcm->txq, skb); 429 hci_uart_tx_wakeup(hu); 430 431 return 0; 432 } 433 434 static int bcm_open(struct hci_uart *hu) 435 { 436 struct bcm_data *bcm; 437 struct list_head *p; 438 int err; 439 440 bt_dev_dbg(hu->hdev, "hu %p", hu); 441 442 if (!hci_uart_has_flow_control(hu)) 443 return -EOPNOTSUPP; 444 445 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); 446 if (!bcm) 447 return -ENOMEM; 448 449 skb_queue_head_init(&bcm->txq); 450 451 hu->priv = bcm; 452 453 mutex_lock(&bcm_device_lock); 454 455 if (hu->serdev) { 456 bcm->dev = serdev_device_get_drvdata(hu->serdev); 457 goto out; 458 } 459 460 if (!hu->tty->dev) 461 goto out; 462 463 list_for_each(p, &bcm_device_list) { 464 struct bcm_device *dev = list_entry(p, struct bcm_device, list); 465 466 /* Retrieve saved bcm_device based on parent of the 467 * platform device (saved during device probe) and 468 * parent of tty device used by hci_uart 469 */ 470 if (hu->tty->dev->parent == dev->dev->parent) { 471 bcm->dev = dev; 472 #ifdef CONFIG_PM 473 dev->hu = hu; 474 #endif 475 break; 476 } 477 } 478 479 out: 480 if (bcm->dev) { 481 if (bcm->dev->use_autobaud_mode) 482 hci_uart_set_flow_control(hu, false); /* Assert BT_UART_CTS_N */ 483 else if (bcm->dev->drive_rts_on_open) 484 hci_uart_set_flow_control(hu, true); 485 486 if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed) 487 hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed); 488 else 489 hu->init_speed = bcm->dev->init_speed; 490 491 /* If oper_speed is set, ldisc/serdev will set the baudrate 492 * before calling setup() 493 */ 494 if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode) 495 hu->oper_speed = bcm->dev->oper_speed; 496 497 err = bcm_gpio_set_power(bcm->dev, true); 498 499 if (bcm->dev->drive_rts_on_open) 500 hci_uart_set_flow_control(hu, false); 501 502 if (err) 503 goto err_unset_hu; 504 } 505 506 mutex_unlock(&bcm_device_lock); 507 return 0; 508 509 err_unset_hu: 510 #ifdef CONFIG_PM 511 if (!hu->serdev) 512 bcm->dev->hu = NULL; 513 #endif 514 mutex_unlock(&bcm_device_lock); 515 hu->priv = NULL; 516 kfree(bcm); 517 return err; 518 } 519 520 static int bcm_close(struct hci_uart *hu) 521 { 522 struct bcm_data *bcm = hu->priv; 523 struct bcm_device *bdev = NULL; 524 int err; 525 526 bt_dev_dbg(hu->hdev, "hu %p", hu); 527 528 /* Protect bcm->dev against removal of the device or driver */ 529 mutex_lock(&bcm_device_lock); 530 531 if (hu->serdev) { 532 bdev = serdev_device_get_drvdata(hu->serdev); 533 } else if (bcm_device_exists(bcm->dev)) { 534 bdev = bcm->dev; 535 #ifdef CONFIG_PM 536 bdev->hu = NULL; 537 #endif 538 } 539 540 if (bdev) { 541 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { 542 devm_free_irq(bdev->dev, bdev->irq, bdev); 543 device_init_wakeup(bdev->dev, false); 544 pm_runtime_disable(bdev->dev); 545 } 546 547 err = bcm_gpio_set_power(bdev, false); 548 if (err) 549 bt_dev_err(hu->hdev, "Failed to power down"); 550 else 551 pm_runtime_set_suspended(bdev->dev); 552 } 553 mutex_unlock(&bcm_device_lock); 554 555 skb_queue_purge(&bcm->txq); 556 kfree_skb(bcm->rx_skb); 557 kfree(bcm); 558 559 hu->priv = NULL; 560 return 0; 561 } 562 563 static int bcm_flush(struct hci_uart *hu) 564 { 565 struct bcm_data *bcm = hu->priv; 566 567 bt_dev_dbg(hu->hdev, "hu %p", hu); 568 569 skb_queue_purge(&bcm->txq); 570 571 return 0; 572 } 573 574 static int bcm_setup(struct hci_uart *hu) 575 { 576 struct bcm_data *bcm = hu->priv; 577 bool fw_load_done = false; 578 bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0); 579 unsigned int speed; 580 int err; 581 582 bt_dev_dbg(hu->hdev, "hu %p", hu); 583 584 hu->hdev->set_diag = bcm_set_diag; 585 hu->hdev->set_bdaddr = btbcm_set_bdaddr; 586 587 err = btbcm_initialize(hu->hdev, &fw_load_done, use_autobaud_mode); 588 if (err) 589 return err; 590 591 if (!fw_load_done) 592 return 0; 593 594 /* Init speed if any */ 595 if (bcm->dev && bcm->dev->init_speed) 596 speed = bcm->dev->init_speed; 597 else if (hu->proto->init_speed) 598 speed = hu->proto->init_speed; 599 else 600 speed = 0; 601 602 if (speed) 603 host_set_baudrate(hu, speed); 604 605 /* Operational speed if any */ 606 if (hu->oper_speed) 607 speed = hu->oper_speed; 608 else if (bcm->dev && bcm->dev->oper_speed) 609 speed = bcm->dev->oper_speed; 610 else if (hu->proto->oper_speed) 611 speed = hu->proto->oper_speed; 612 else 613 speed = 0; 614 615 if (speed) { 616 err = bcm_set_baudrate(hu, speed); 617 if (!err) 618 host_set_baudrate(hu, speed); 619 } 620 621 /* PCM parameters if provided */ 622 if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) { 623 struct bcm_set_pcm_int_params params; 624 625 btbcm_read_pcm_int_params(hu->hdev, ¶ms); 626 627 memcpy(¶ms, bcm->dev->pcm_int_params, 5); 628 btbcm_write_pcm_int_params(hu->hdev, ¶ms); 629 } 630 631 err = btbcm_finalize(hu->hdev, &fw_load_done, use_autobaud_mode); 632 if (err) 633 return err; 634 635 /* Some devices ship with the controller default address. 636 * Allow the bootloader to set a valid address through the 637 * device tree. 638 */ 639 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks); 640 641 if (!bcm_request_irq(bcm)) 642 err = bcm_setup_sleep(hu); 643 644 return err; 645 } 646 647 #define BCM_RECV_LM_DIAG \ 648 .type = BCM_LM_DIAG_PKT, \ 649 .hlen = BCM_LM_DIAG_SIZE, \ 650 .loff = 0, \ 651 .lsize = 0, \ 652 .maxlen = BCM_LM_DIAG_SIZE 653 654 #define BCM_RECV_NULL \ 655 .type = BCM_NULL_PKT, \ 656 .hlen = BCM_NULL_SIZE, \ 657 .loff = 0, \ 658 .lsize = 0, \ 659 .maxlen = BCM_NULL_SIZE 660 661 #define BCM_RECV_TYPE49 \ 662 .type = BCM_TYPE49_PKT, \ 663 .hlen = BCM_TYPE49_SIZE, \ 664 .loff = 0, \ 665 .lsize = 0, \ 666 .maxlen = BCM_TYPE49_SIZE 667 668 #define BCM_RECV_TYPE52 \ 669 .type = BCM_TYPE52_PKT, \ 670 .hlen = BCM_TYPE52_SIZE, \ 671 .loff = 0, \ 672 .lsize = 0, \ 673 .maxlen = BCM_TYPE52_SIZE 674 675 static const struct h4_recv_pkt bcm_recv_pkts[] = { 676 { H4_RECV_ACL, .recv = hci_recv_frame }, 677 { H4_RECV_SCO, .recv = hci_recv_frame }, 678 { H4_RECV_EVENT, .recv = hci_recv_frame }, 679 { H4_RECV_ISO, .recv = hci_recv_frame }, 680 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, 681 { BCM_RECV_NULL, .recv = hci_recv_diag }, 682 { BCM_RECV_TYPE49, .recv = hci_recv_diag }, 683 { BCM_RECV_TYPE52, .recv = hci_recv_diag }, 684 }; 685 686 static int bcm_recv(struct hci_uart *hu, const void *data, int count) 687 { 688 struct bcm_data *bcm = hu->priv; 689 690 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 691 return -EUNATCH; 692 693 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, 694 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); 695 if (IS_ERR(bcm->rx_skb)) { 696 int err = PTR_ERR(bcm->rx_skb); 697 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 698 bcm->rx_skb = NULL; 699 return err; 700 } else if (!bcm->rx_skb) { 701 /* Delay auto-suspend when receiving completed packet */ 702 mutex_lock(&bcm_device_lock); 703 if (bcm->dev && bcm_device_exists(bcm->dev)) { 704 pm_runtime_get(bcm->dev->dev); 705 pm_runtime_mark_last_busy(bcm->dev->dev); 706 pm_runtime_put_autosuspend(bcm->dev->dev); 707 } 708 mutex_unlock(&bcm_device_lock); 709 } 710 711 return count; 712 } 713 714 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) 715 { 716 struct bcm_data *bcm = hu->priv; 717 718 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); 719 720 /* Prepend skb with frame type */ 721 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 722 skb_queue_tail(&bcm->txq, skb); 723 724 return 0; 725 } 726 727 static struct sk_buff *bcm_dequeue(struct hci_uart *hu) 728 { 729 struct bcm_data *bcm = hu->priv; 730 struct sk_buff *skb = NULL; 731 struct bcm_device *bdev = NULL; 732 733 mutex_lock(&bcm_device_lock); 734 735 if (bcm_device_exists(bcm->dev)) { 736 bdev = bcm->dev; 737 pm_runtime_get_sync(bdev->dev); 738 /* Shall be resumed here */ 739 } 740 741 skb = skb_dequeue(&bcm->txq); 742 743 if (bdev) { 744 pm_runtime_mark_last_busy(bdev->dev); 745 pm_runtime_put_autosuspend(bdev->dev); 746 } 747 748 mutex_unlock(&bcm_device_lock); 749 750 return skb; 751 } 752 753 #ifdef CONFIG_PM 754 static int bcm_suspend_device(struct device *dev) 755 { 756 struct bcm_device *bdev = dev_get_drvdata(dev); 757 int err; 758 759 bt_dev_dbg(bdev, ""); 760 761 if (!bdev->is_suspended && bdev->hu) { 762 hci_uart_set_flow_control(bdev->hu, true); 763 764 /* Once this returns, driver suspends BT via GPIO */ 765 bdev->is_suspended = true; 766 } 767 768 /* Suspend the device */ 769 err = bdev->set_device_wakeup(bdev, false); 770 if (err) { 771 if (bdev->is_suspended && bdev->hu) { 772 bdev->is_suspended = false; 773 hci_uart_set_flow_control(bdev->hu, false); 774 } 775 return -EBUSY; 776 } 777 778 bt_dev_dbg(bdev, "suspend, delaying 15 ms"); 779 msleep(15); 780 781 return 0; 782 } 783 784 static int bcm_resume_device(struct device *dev) 785 { 786 struct bcm_device *bdev = dev_get_drvdata(dev); 787 int err; 788 789 bt_dev_dbg(bdev, ""); 790 791 err = bdev->set_device_wakeup(bdev, true); 792 if (err) { 793 dev_err(dev, "Failed to power up\n"); 794 return err; 795 } 796 797 bt_dev_dbg(bdev, "resume, delaying 15 ms"); 798 msleep(15); 799 800 /* When this executes, the device has woken up already */ 801 if (bdev->is_suspended && bdev->hu) { 802 bdev->is_suspended = false; 803 804 hci_uart_set_flow_control(bdev->hu, false); 805 } 806 807 return 0; 808 } 809 #endif 810 811 #ifdef CONFIG_PM_SLEEP 812 /* suspend callback */ 813 static int bcm_suspend(struct device *dev) 814 { 815 struct bcm_device *bdev = dev_get_drvdata(dev); 816 int error; 817 818 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); 819 820 /* 821 * When used with a device instantiated as platform_device, bcm_suspend 822 * can be called at any time as long as the platform device is bound, 823 * so it should use bcm_device_lock to protect access to hci_uart 824 * and device_wake-up GPIO. 825 */ 826 mutex_lock(&bcm_device_lock); 827 828 if (!bdev->hu) 829 goto unlock; 830 831 if (pm_runtime_active(dev)) 832 bcm_suspend_device(dev); 833 834 if (device_may_wakeup(dev) && bdev->irq > 0) { 835 error = enable_irq_wake(bdev->irq); 836 if (!error) 837 bt_dev_dbg(bdev, "BCM irq: enabled"); 838 } 839 840 unlock: 841 mutex_unlock(&bcm_device_lock); 842 843 return 0; 844 } 845 846 /* resume callback */ 847 static int bcm_resume(struct device *dev) 848 { 849 struct bcm_device *bdev = dev_get_drvdata(dev); 850 int err = 0; 851 852 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); 853 854 /* 855 * When used with a device instantiated as platform_device, bcm_resume 856 * can be called at any time as long as platform device is bound, 857 * so it should use bcm_device_lock to protect access to hci_uart 858 * and device_wake-up GPIO. 859 */ 860 mutex_lock(&bcm_device_lock); 861 862 if (!bdev->hu) 863 goto unlock; 864 865 if (device_may_wakeup(dev) && bdev->irq > 0) { 866 disable_irq_wake(bdev->irq); 867 bt_dev_dbg(bdev, "BCM irq: disabled"); 868 } 869 870 err = bcm_resume_device(dev); 871 872 unlock: 873 mutex_unlock(&bcm_device_lock); 874 875 if (!err) { 876 pm_runtime_disable(dev); 877 pm_runtime_set_active(dev); 878 pm_runtime_enable(dev); 879 } 880 881 return 0; 882 } 883 #endif 884 885 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ 886 static struct gpiod_lookup_table asus_tf103c_irq_gpios = { 887 .dev_id = "serial0-0", 888 .table = { 889 GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH), 890 { } 891 }, 892 }; 893 894 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { 895 { 896 .ident = "Asus TF103C", 897 .matches = { 898 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 899 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), 900 }, 901 .driver_data = &asus_tf103c_irq_gpios, 902 }, 903 { 904 .ident = "Meegopad T08", 905 .matches = { 906 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, 907 "To be filled by OEM."), 908 DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), 909 DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), 910 }, 911 }, 912 { } 913 }; 914 915 #ifdef CONFIG_ACPI 916 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 917 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 918 static const struct acpi_gpio_params third_gpio = { 2, 0, false }; 919 920 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { 921 { "device-wakeup-gpios", &first_gpio, 1 }, 922 { "shutdown-gpios", &second_gpio, 1 }, 923 { "host-wakeup-gpios", &third_gpio, 1 }, 924 { }, 925 }; 926 927 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { 928 { "host-wakeup-gpios", &first_gpio, 1 }, 929 { "device-wakeup-gpios", &second_gpio, 1 }, 930 { "shutdown-gpios", &third_gpio, 1 }, 931 { }, 932 }; 933 934 static int bcm_resource(struct acpi_resource *ares, void *data) 935 { 936 struct bcm_device *dev = data; 937 struct acpi_resource_extended_irq *irq; 938 struct acpi_resource_gpio *gpio; 939 struct acpi_resource_uart_serialbus *sb; 940 941 switch (ares->type) { 942 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 943 irq = &ares->data.extended_irq; 944 if (irq->polarity != ACPI_ACTIVE_LOW) 945 dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); 946 dev->irq_active_low = true; 947 break; 948 949 case ACPI_RESOURCE_TYPE_GPIO: 950 gpio = &ares->data.gpio; 951 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 952 dev->gpio_int_idx = dev->gpio_count; 953 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; 954 } 955 dev->gpio_count++; 956 break; 957 958 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 959 sb = &ares->data.uart_serial_bus; 960 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { 961 dev->init_speed = sb->default_baud_rate; 962 dev->oper_speed = 4000000; 963 } 964 break; 965 966 default: 967 break; 968 } 969 970 return 0; 971 } 972 973 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) 974 { 975 if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) 976 return -EIO; 977 978 return 0; 979 } 980 981 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) 982 { 983 if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, 984 NULL, NULL, NULL))) 985 return -EIO; 986 987 return 0; 988 } 989 990 static int bcm_apple_get_resources(struct bcm_device *dev) 991 { 992 struct acpi_device *adev = ACPI_COMPANION(dev->dev); 993 const union acpi_object *obj; 994 995 if (!adev || 996 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || 997 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || 998 ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) 999 return -ENODEV; 1000 1001 if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && 1002 obj->buffer.length == 8) 1003 dev->init_speed = *(u64 *)obj->buffer.pointer; 1004 1005 dev->set_device_wakeup = bcm_apple_set_device_wakeup; 1006 dev->set_shutdown = bcm_apple_set_shutdown; 1007 1008 return 0; 1009 } 1010 #else 1011 static inline int bcm_apple_get_resources(struct bcm_device *dev) 1012 { 1013 return -EOPNOTSUPP; 1014 } 1015 #endif /* CONFIG_ACPI */ 1016 1017 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) 1018 { 1019 gpiod_set_value_cansleep(dev->device_wakeup, awake); 1020 return 0; 1021 } 1022 1023 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) 1024 { 1025 gpiod_set_value_cansleep(dev->shutdown, powered); 1026 if (dev->reset) 1027 /* 1028 * The reset line is asserted on powerdown and deasserted 1029 * on poweron so the inverse of powered is used. Notice 1030 * that the GPIO line BT_RST_N needs to be specified as 1031 * active low in the device tree or similar system 1032 * description. 1033 */ 1034 gpiod_set_value_cansleep(dev->reset, !powered); 1035 return 0; 1036 } 1037 1038 /* Try a bunch of names for TXCO */ 1039 static struct clk *bcm_get_txco(struct device *dev) 1040 { 1041 struct clk *clk; 1042 1043 /* New explicit name */ 1044 clk = devm_clk_get(dev, "txco"); 1045 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1046 return clk; 1047 1048 /* Deprecated name */ 1049 clk = devm_clk_get(dev, "extclk"); 1050 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) 1051 return clk; 1052 1053 /* Original code used no name at all */ 1054 return devm_clk_get(dev, NULL); 1055 } 1056 1057 static int bcm_get_resources(struct bcm_device *dev) 1058 { 1059 const struct dmi_system_id *broken_irq_dmi_id; 1060 const char *irq_con_id = "host-wakeup"; 1061 int err; 1062 1063 dev->name = dev_name(dev->dev); 1064 1065 if (x86_apple_machine && !bcm_apple_get_resources(dev)) 1066 return 0; 1067 1068 dev->txco_clk = bcm_get_txco(dev->dev); 1069 1070 /* Handle deferred probing */ 1071 if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) 1072 return PTR_ERR(dev->txco_clk); 1073 1074 /* Ignore all other errors as before */ 1075 if (IS_ERR(dev->txco_clk)) 1076 dev->txco_clk = NULL; 1077 1078 dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); 1079 if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) 1080 return PTR_ERR(dev->lpo_clk); 1081 1082 if (IS_ERR(dev->lpo_clk)) 1083 dev->lpo_clk = NULL; 1084 1085 /* Check if we accidentally fetched the lpo clock twice */ 1086 if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { 1087 devm_clk_put(dev->dev, dev->txco_clk); 1088 dev->txco_clk = NULL; 1089 } 1090 1091 dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", 1092 GPIOD_OUT_LOW); 1093 if (IS_ERR(dev->device_wakeup)) 1094 return PTR_ERR(dev->device_wakeup); 1095 1096 dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", 1097 GPIOD_OUT_LOW); 1098 if (IS_ERR(dev->shutdown)) 1099 return PTR_ERR(dev->shutdown); 1100 1101 dev->reset = devm_gpiod_get_optional(dev->dev, "reset", 1102 GPIOD_OUT_LOW); 1103 if (IS_ERR(dev->reset)) 1104 return PTR_ERR(dev->reset); 1105 1106 dev->set_device_wakeup = bcm_gpio_set_device_wakeup; 1107 dev->set_shutdown = bcm_gpio_set_shutdown; 1108 1109 dev->supplies[0].supply = "vbat"; 1110 dev->supplies[1].supply = "vddio"; 1111 err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, 1112 dev->supplies); 1113 if (err) 1114 return err; 1115 1116 broken_irq_dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); 1117 if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) { 1118 gpiod_add_lookup_table(broken_irq_dmi_id->driver_data); 1119 irq_con_id = "host-wakeup-alt"; 1120 dev->irq_active_low = false; 1121 dev->irq = 0; 1122 } 1123 1124 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ 1125 if (dev->irq <= 0) { 1126 struct gpio_desc *gpio; 1127 1128 gpio = devm_gpiod_get_optional(dev->dev, irq_con_id, GPIOD_IN); 1129 if (IS_ERR(gpio)) 1130 return PTR_ERR(gpio); 1131 1132 dev->irq = gpiod_to_irq(gpio); 1133 } 1134 1135 if (broken_irq_dmi_id) { 1136 if (broken_irq_dmi_id->driver_data) { 1137 gpiod_remove_lookup_table(broken_irq_dmi_id->driver_data); 1138 } else { 1139 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", 1140 broken_irq_dmi_id->ident); 1141 dev->irq = 0; 1142 } 1143 } 1144 1145 dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); 1146 return 0; 1147 } 1148 1149 #ifdef CONFIG_ACPI 1150 static int bcm_acpi_probe(struct bcm_device *dev) 1151 { 1152 LIST_HEAD(resources); 1153 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; 1154 struct resource_entry *entry; 1155 int ret; 1156 1157 /* Retrieve UART ACPI info */ 1158 dev->gpio_int_idx = -1; 1159 ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), 1160 &resources, bcm_resource, dev); 1161 if (ret < 0) 1162 return ret; 1163 1164 resource_list_for_each_entry(entry, &resources) { 1165 if (resource_type(entry->res) == IORESOURCE_IRQ) { 1166 dev->irq = entry->res->start; 1167 break; 1168 } 1169 } 1170 acpi_dev_free_resource_list(&resources); 1171 1172 /* If the DSDT uses an Interrupt resource for the IRQ, then there are 1173 * only 2 GPIO resources, we use the irq-last mapping for this, since 1174 * we already have an irq the 3th / last mapping will not be used. 1175 */ 1176 if (dev->irq) 1177 gpio_mapping = acpi_bcm_int_last_gpios; 1178 else if (dev->gpio_int_idx == 0) 1179 gpio_mapping = acpi_bcm_int_first_gpios; 1180 else if (dev->gpio_int_idx == 2) 1181 gpio_mapping = acpi_bcm_int_last_gpios; 1182 else 1183 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", 1184 dev->gpio_int_idx); 1185 1186 /* Warn if our expectations are not met. */ 1187 if (dev->gpio_count != (dev->irq ? 2 : 3)) 1188 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", 1189 dev->gpio_count); 1190 1191 ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); 1192 if (ret) 1193 return ret; 1194 1195 if (irq_polarity != -1) { 1196 dev->irq_active_low = irq_polarity; 1197 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", 1198 dev->irq_active_low ? "low" : "high"); 1199 } 1200 1201 return 0; 1202 } 1203 #else 1204 static int bcm_acpi_probe(struct bcm_device *dev) 1205 { 1206 return -EINVAL; 1207 } 1208 #endif /* CONFIG_ACPI */ 1209 1210 static int bcm_of_probe(struct bcm_device *bdev) 1211 { 1212 bdev->use_autobaud_mode = device_property_read_bool(bdev->dev, 1213 "brcm,requires-autobaud-mode"); 1214 device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); 1215 device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params", 1216 bdev->pcm_int_params, 5); 1217 bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup"); 1218 bdev->irq_active_low = irq_get_trigger_type(bdev->irq) 1219 & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW); 1220 return 0; 1221 } 1222 1223 static int bcm_probe(struct platform_device *pdev) 1224 { 1225 struct bcm_device *dev; 1226 int ret; 1227 1228 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); 1229 if (!dev) 1230 return -ENOMEM; 1231 1232 dev->dev = &pdev->dev; 1233 1234 ret = platform_get_irq(pdev, 0); 1235 if (ret < 0) 1236 return ret; 1237 1238 dev->irq = ret; 1239 1240 /* Initialize routing field to an unused value */ 1241 dev->pcm_int_params[0] = 0xff; 1242 1243 if (has_acpi_companion(&pdev->dev)) { 1244 ret = bcm_acpi_probe(dev); 1245 if (ret) 1246 return ret; 1247 } 1248 1249 ret = bcm_get_resources(dev); 1250 if (ret) 1251 return ret; 1252 1253 platform_set_drvdata(pdev, dev); 1254 1255 dev_info(&pdev->dev, "%s device registered.\n", dev->name); 1256 1257 /* Place this instance on the device list */ 1258 mutex_lock(&bcm_device_lock); 1259 list_add_tail(&dev->list, &bcm_device_list); 1260 mutex_unlock(&bcm_device_lock); 1261 1262 ret = bcm_gpio_set_power(dev, false); 1263 if (ret) 1264 dev_err(&pdev->dev, "Failed to power down\n"); 1265 1266 return 0; 1267 } 1268 1269 static int bcm_remove(struct platform_device *pdev) 1270 { 1271 struct bcm_device *dev = platform_get_drvdata(pdev); 1272 1273 mutex_lock(&bcm_device_lock); 1274 list_del(&dev->list); 1275 mutex_unlock(&bcm_device_lock); 1276 1277 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); 1278 1279 return 0; 1280 } 1281 1282 static const struct hci_uart_proto bcm_proto = { 1283 .id = HCI_UART_BCM, 1284 .name = "Broadcom", 1285 .manufacturer = 15, 1286 .init_speed = 115200, 1287 .open = bcm_open, 1288 .close = bcm_close, 1289 .flush = bcm_flush, 1290 .setup = bcm_setup, 1291 .set_baudrate = bcm_set_baudrate, 1292 .recv = bcm_recv, 1293 .enqueue = bcm_enqueue, 1294 .dequeue = bcm_dequeue, 1295 }; 1296 1297 #ifdef CONFIG_ACPI 1298 static const struct acpi_device_id bcm_acpi_match[] = { 1299 { "BCM2E00" }, 1300 { "BCM2E01" }, 1301 { "BCM2E02" }, 1302 { "BCM2E03" }, 1303 { "BCM2E04" }, 1304 { "BCM2E05" }, 1305 { "BCM2E06" }, 1306 { "BCM2E07" }, 1307 { "BCM2E08" }, 1308 { "BCM2E09" }, 1309 { "BCM2E0A" }, 1310 { "BCM2E0B" }, 1311 { "BCM2E0C" }, 1312 { "BCM2E0D" }, 1313 { "BCM2E0E" }, 1314 { "BCM2E0F" }, 1315 { "BCM2E10" }, 1316 { "BCM2E11" }, 1317 { "BCM2E12" }, 1318 { "BCM2E13" }, 1319 { "BCM2E14" }, 1320 { "BCM2E15" }, 1321 { "BCM2E16" }, 1322 { "BCM2E17" }, 1323 { "BCM2E18" }, 1324 { "BCM2E19" }, 1325 { "BCM2E1A" }, 1326 { "BCM2E1B" }, 1327 { "BCM2E1C" }, 1328 { "BCM2E1D" }, 1329 { "BCM2E1F" }, 1330 { "BCM2E20" }, 1331 { "BCM2E21" }, 1332 { "BCM2E22" }, 1333 { "BCM2E23" }, 1334 { "BCM2E24" }, 1335 { "BCM2E25" }, 1336 { "BCM2E26" }, 1337 { "BCM2E27" }, 1338 { "BCM2E28" }, 1339 { "BCM2E29" }, 1340 { "BCM2E2A" }, 1341 { "BCM2E2B" }, 1342 { "BCM2E2C" }, 1343 { "BCM2E2D" }, 1344 { "BCM2E2E" }, 1345 { "BCM2E2F" }, 1346 { "BCM2E30" }, 1347 { "BCM2E31" }, 1348 { "BCM2E32" }, 1349 { "BCM2E33" }, 1350 { "BCM2E34" }, 1351 { "BCM2E35" }, 1352 { "BCM2E36" }, 1353 { "BCM2E37" }, 1354 { "BCM2E38" }, 1355 { "BCM2E39" }, 1356 { "BCM2E3A" }, 1357 { "BCM2E3B" }, 1358 { "BCM2E3C" }, 1359 { "BCM2E3D" }, 1360 { "BCM2E3E" }, 1361 { "BCM2E3F" }, 1362 { "BCM2E40" }, 1363 { "BCM2E41" }, 1364 { "BCM2E42" }, 1365 { "BCM2E43" }, 1366 { "BCM2E44" }, 1367 { "BCM2E45" }, 1368 { "BCM2E46" }, 1369 { "BCM2E47" }, 1370 { "BCM2E48" }, 1371 { "BCM2E49" }, 1372 { "BCM2E4A" }, 1373 { "BCM2E4B" }, 1374 { "BCM2E4C" }, 1375 { "BCM2E4D" }, 1376 { "BCM2E4E" }, 1377 { "BCM2E4F" }, 1378 { "BCM2E50" }, 1379 { "BCM2E51" }, 1380 { "BCM2E52" }, 1381 { "BCM2E53" }, 1382 { "BCM2E54" }, 1383 { "BCM2E55" }, 1384 { "BCM2E56" }, 1385 { "BCM2E57" }, 1386 { "BCM2E58" }, 1387 { "BCM2E59" }, 1388 { "BCM2E5A" }, 1389 { "BCM2E5B" }, 1390 { "BCM2E5C" }, 1391 { "BCM2E5D" }, 1392 { "BCM2E5E" }, 1393 { "BCM2E5F" }, 1394 { "BCM2E60" }, 1395 { "BCM2E61" }, 1396 { "BCM2E62" }, 1397 { "BCM2E63" }, 1398 { "BCM2E64" }, 1399 { "BCM2E65" }, 1400 { "BCM2E66" }, 1401 { "BCM2E67" }, 1402 { "BCM2E68" }, 1403 { "BCM2E69" }, 1404 { "BCM2E6B" }, 1405 { "BCM2E6D" }, 1406 { "BCM2E6E" }, 1407 { "BCM2E6F" }, 1408 { "BCM2E70" }, 1409 { "BCM2E71" }, 1410 { "BCM2E72" }, 1411 { "BCM2E73" }, 1412 { "BCM2E74" }, 1413 { "BCM2E75" }, 1414 { "BCM2E76" }, 1415 { "BCM2E77" }, 1416 { "BCM2E78" }, 1417 { "BCM2E79" }, 1418 { "BCM2E7A" }, 1419 { "BCM2E7B" }, 1420 { "BCM2E7C" }, 1421 { "BCM2E7D" }, 1422 { "BCM2E7E" }, 1423 { "BCM2E7F" }, 1424 { "BCM2E80" }, 1425 { "BCM2E81" }, 1426 { "BCM2E82" }, 1427 { "BCM2E83" }, 1428 { "BCM2E84" }, 1429 { "BCM2E85" }, 1430 { "BCM2E86" }, 1431 { "BCM2E87" }, 1432 { "BCM2E88" }, 1433 { "BCM2E89" }, 1434 { "BCM2E8A" }, 1435 { "BCM2E8B" }, 1436 { "BCM2E8C" }, 1437 { "BCM2E8D" }, 1438 { "BCM2E8E" }, 1439 { "BCM2E90" }, 1440 { "BCM2E92" }, 1441 { "BCM2E93" }, 1442 { "BCM2E94" }, 1443 { "BCM2E95" }, 1444 { "BCM2E96" }, 1445 { "BCM2E97" }, 1446 { "BCM2E98" }, 1447 { "BCM2E99" }, 1448 { "BCM2E9A" }, 1449 { "BCM2E9B" }, 1450 { "BCM2E9C" }, 1451 { "BCM2E9D" }, 1452 { "BCM2EA0" }, 1453 { "BCM2EA1" }, 1454 { "BCM2EA2" }, 1455 { "BCM2EA3" }, 1456 { "BCM2EA4" }, 1457 { "BCM2EA5" }, 1458 { "BCM2EA6" }, 1459 { "BCM2EA7" }, 1460 { "BCM2EA8" }, 1461 { "BCM2EA9" }, 1462 { "BCM2EAA" }, 1463 { "BCM2EAB" }, 1464 { "BCM2EAC" }, 1465 { }, 1466 }; 1467 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); 1468 #endif 1469 1470 /* suspend and resume callbacks */ 1471 static const struct dev_pm_ops bcm_pm_ops = { 1472 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) 1473 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) 1474 }; 1475 1476 static struct platform_driver bcm_driver = { 1477 .probe = bcm_probe, 1478 .remove = bcm_remove, 1479 .driver = { 1480 .name = "hci_bcm", 1481 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1482 .pm = &bcm_pm_ops, 1483 }, 1484 }; 1485 1486 static int bcm_serdev_probe(struct serdev_device *serdev) 1487 { 1488 struct bcm_device *bcmdev; 1489 const struct bcm_device_data *data; 1490 int err; 1491 1492 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); 1493 if (!bcmdev) 1494 return -ENOMEM; 1495 1496 bcmdev->dev = &serdev->dev; 1497 #ifdef CONFIG_PM 1498 bcmdev->hu = &bcmdev->serdev_hu; 1499 #endif 1500 bcmdev->serdev_hu.serdev = serdev; 1501 serdev_device_set_drvdata(serdev, bcmdev); 1502 1503 /* Initialize routing field to an unused value */ 1504 bcmdev->pcm_int_params[0] = 0xff; 1505 1506 if (has_acpi_companion(&serdev->dev)) 1507 err = bcm_acpi_probe(bcmdev); 1508 else 1509 err = bcm_of_probe(bcmdev); 1510 if (err) 1511 return err; 1512 1513 err = bcm_get_resources(bcmdev); 1514 if (err) 1515 return err; 1516 1517 if (!bcmdev->shutdown) { 1518 dev_warn(&serdev->dev, 1519 "No reset resource, using default baud rate\n"); 1520 bcmdev->oper_speed = bcmdev->init_speed; 1521 } 1522 1523 err = bcm_gpio_set_power(bcmdev, false); 1524 if (err) 1525 dev_err(&serdev->dev, "Failed to power down\n"); 1526 1527 data = device_get_match_data(bcmdev->dev); 1528 if (data) { 1529 bcmdev->max_autobaud_speed = data->max_autobaud_speed; 1530 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; 1531 bcmdev->drive_rts_on_open = data->drive_rts_on_open; 1532 } 1533 1534 return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); 1535 } 1536 1537 static void bcm_serdev_remove(struct serdev_device *serdev) 1538 { 1539 struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); 1540 1541 hci_uart_unregister_device(&bcmdev->serdev_hu); 1542 } 1543 1544 #ifdef CONFIG_OF 1545 static struct bcm_device_data bcm4354_device_data = { 1546 .no_early_set_baudrate = true, 1547 }; 1548 1549 static struct bcm_device_data bcm43438_device_data = { 1550 .drive_rts_on_open = true, 1551 }; 1552 1553 static struct bcm_device_data cyw55572_device_data = { 1554 .max_autobaud_speed = 921600, 1555 }; 1556 1557 static const struct of_device_id bcm_bluetooth_of_match[] = { 1558 { .compatible = "brcm,bcm20702a1" }, 1559 { .compatible = "brcm,bcm4329-bt" }, 1560 { .compatible = "brcm,bcm4330-bt" }, 1561 { .compatible = "brcm,bcm4334-bt" }, 1562 { .compatible = "brcm,bcm4345c5" }, 1563 { .compatible = "brcm,bcm43430a0-bt" }, 1564 { .compatible = "brcm,bcm43430a1-bt" }, 1565 { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, 1566 { .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data }, 1567 { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, 1568 { .compatible = "brcm,bcm4335a0" }, 1569 { .compatible = "infineon,cyw55572-bt", .data = &cyw55572_device_data }, 1570 { }, 1571 }; 1572 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); 1573 #endif 1574 1575 static struct serdev_device_driver bcm_serdev_driver = { 1576 .probe = bcm_serdev_probe, 1577 .remove = bcm_serdev_remove, 1578 .driver = { 1579 .name = "hci_uart_bcm", 1580 .of_match_table = of_match_ptr(bcm_bluetooth_of_match), 1581 .acpi_match_table = ACPI_PTR(bcm_acpi_match), 1582 .pm = &bcm_pm_ops, 1583 }, 1584 }; 1585 1586 int __init bcm_init(void) 1587 { 1588 /* For now, we need to keep both platform device 1589 * driver (ACPI generated) and serdev driver (DT). 1590 */ 1591 platform_driver_register(&bcm_driver); 1592 serdev_device_driver_register(&bcm_serdev_driver); 1593 1594 return hci_uart_register_proto(&bcm_proto); 1595 } 1596 1597 int __exit bcm_deinit(void) 1598 { 1599 platform_driver_unregister(&bcm_driver); 1600 serdev_device_driver_unregister(&bcm_serdev_driver); 1601 1602 return hci_uart_unregister_proto(&bcm_proto); 1603 } 1604