drivers/bluetooth/hci_bcm.c

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