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/property.h>
  17 #include <linux/platform_data/x86/apple.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/regulator/consumer.h>
  20 #include <linux/clk.h>
  21 #include <linux/gpio/consumer.h>
  22 #include <linux/tty.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/dmi.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/serdev.h>
  27
  28 #include <net/bluetooth/bluetooth.h>
  29 #include <net/bluetooth/hci_core.h>
  30
  31 #include "btbcm.h"
  32 #include "hci_uart.h"
  33
  34 #define BCM_NULL_PKT 0x00
  35 #define BCM_NULL_SIZE 0
  36
  37 #define BCM_LM_DIAG_PKT 0x07
  38 #define BCM_LM_DIAG_SIZE 63
  39
  40 #define BCM_TYPE49_PKT 0x31
  41 #define BCM_TYPE49_SIZE 0
  42
  43 #define BCM_TYPE52_PKT 0x34
  44 #define BCM_TYPE52_SIZE 0
  45
  46 #define BCM_AUTOSUSPEND_DELAY   5000 /* default autosleep delay */
  47
  48 #define BCM_NUM_SUPPLIES 2
  49
  50 /**
  51  * struct bcm_device - device driver resources
  52  * @serdev_hu: HCI UART controller struct
  53  * @list: bcm_device_list node
  54  * @dev: physical UART slave
  55  * @name: device name logged by bt_dev_*() functions
  56  * @device_wakeup: BT_WAKE pin,
  57  *      assert = Bluetooth device must wake up or remain awake,
  58  *      deassert = Bluetooth device may sleep when sleep criteria are met
  59  * @shutdown: BT_REG_ON pin,
  60  *      power up or power down Bluetooth device internal regulators
  61  * @set_device_wakeup: callback to toggle BT_WAKE pin
  62  *      either by accessing @device_wakeup or by calling @btlp
  63  * @set_shutdown: callback to toggle BT_REG_ON pin
  64  *      either by accessing @shutdown or by calling @btpu/@btpd
  65  * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
  66  * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
  67  * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
  68  * @txco_clk: external reference frequency clock used by Bluetooth device
  69  * @lpo_clk: external LPO clock used by Bluetooth device
  70  * @supplies: VBAT and VDDIO supplies used by Bluetooth device
  71  * @res_enabled: whether clocks and supplies are prepared and enabled
  72  * @init_speed: default baudrate of Bluetooth device;
  73  *      the host UART is initially set to this baudrate so that
  74  *      it can configure the Bluetooth device for @oper_speed
  75  * @oper_speed: preferred baudrate of Bluetooth device;
  76  *      set to 0 if @init_speed is already the preferred baudrate
  77  * @irq: interrupt triggered by HOST_WAKE_BT pin
  78  * @irq_active_low: whether @irq is active low
  79  * @hu: pointer to HCI UART controller struct,
  80  *      used to disable flow control during runtime suspend and system sleep
  81  * @is_suspended: whether flow control is currently disabled
  82  */
  83 struct bcm_device {
  84         /* Must be the first member, hci_serdev.c expects this. */
  85         struct hci_uart         serdev_hu;
  86         struct list_head        list;
  87
  88         struct device           *dev;
  89
  90         const char              *name;
  91         struct gpio_desc        *device_wakeup;
  92         struct gpio_desc        *shutdown;
  93         int                     (*set_device_wakeup)(struct bcm_device *, bool);
  94         int                     (*set_shutdown)(struct bcm_device *, bool);
  95 #ifdef CONFIG_ACPI
  96         acpi_handle             btlp, btpu, btpd;
  97         int                     gpio_count;
  98         int                     gpio_int_idx;
  99 #endif
 100
 101         struct clk              *txco_clk;
 102         struct clk              *lpo_clk;
 103         struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
 104         bool                    res_enabled;
 105
 106         u32                     init_speed;
 107         u32                     oper_speed;
 108         int                     irq;
 109         bool                    irq_active_low;
 110
 111 #ifdef CONFIG_PM
 112         struct hci_uart         *hu;
 113         bool                    is_suspended;
 114 #endif
 115 };
 116
 117 /* generic bcm uart resources */
 118 struct bcm_data {
 119         struct sk_buff          *rx_skb;
 120         struct sk_buff_head     txq;
 121
 122         struct bcm_device       *dev;
 123 };
 124
 125 /* List of BCM BT UART devices */
 126 static DEFINE_MUTEX(bcm_device_lock);
 127 static LIST_HEAD(bcm_device_list);
 128
 129 static int irq_polarity = -1;
 130 module_param(irq_polarity, int, 0444);
 131 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
 132
 133 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
 134 {
 135         if (hu->serdev)
 136                 serdev_device_set_baudrate(hu->serdev, speed);
 137         else
 138                 hci_uart_set_baudrate(hu, speed);
 139 }
 140
 141 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
 142 {
 143         struct hci_dev *hdev = hu->hdev;
 144         struct sk_buff *skb;
 145         struct bcm_update_uart_baud_rate param;
 146
 147         if (speed > 3000000) {
 148                 struct bcm_write_uart_clock_setting clock;
 149
 150                 clock.type = BCM_UART_CLOCK_48MHZ;
 151
 152                 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
 153
 154                 /* This Broadcom specific command changes the UART's controller
 155                  * clock for baud rate > 3000000.
 156                  */
 157                 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
 158                 if (IS_ERR(skb)) {
 159                         int err = PTR_ERR(skb);
 160                         bt_dev_err(hdev, "BCM: failed to write clock (%d)",
 161                                    err);
 162                         return err;
 163                 }
 164
 165                 kfree_skb(skb);
 166         }
 167
 168         bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
 169
 170         param.zero = cpu_to_le16(0);
 171         param.baud_rate = cpu_to_le32(speed);
 172
 173         /* This Broadcom specific command changes the UART's controller baud
 174          * rate.
 175          */
 176         skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
 177                              HCI_INIT_TIMEOUT);
 178         if (IS_ERR(skb)) {
 179                 int err = PTR_ERR(skb);
 180                 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
 181                            err);
 182                 return err;
 183         }
 184
 185         kfree_skb(skb);
 186
 187         return 0;
 188 }
 189
 190 /* bcm_device_exists should be protected by bcm_device_lock */
 191 static bool bcm_device_exists(struct bcm_device *device)
 192 {
 193         struct list_head *p;
 194
 195 #ifdef CONFIG_PM
 196         /* Devices using serdev always exist */
 197         if (device && device->hu && device->hu->serdev)
 198                 return true;
 199 #endif
 200
 201         list_for_each(p, &bcm_device_list) {
 202                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 203
 204                 if (device == dev)
 205                         return true;
 206         }
 207
 208         return false;
 209 }
 210
 211 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 212 {
 213         int err;
 214
 215         if (powered && !dev->res_enabled) {
 216                 /* Intel Macs use bcm_apple_get_resources() and don't
 217                  * have regulator supplies configured.
 218                  */
 219                 if (dev->supplies[0].supply) {
 220                         err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
 221                                                     dev->supplies);
 222                         if (err)
 223                                 return err;
 224                 }
 225
 226                 /* LPO clock needs to be 32.768 kHz */
 227                 err = clk_set_rate(dev->lpo_clk, 32768);
 228                 if (err) {
 229                         dev_err(dev->dev, "Could not set LPO clock rate\n");
 230                         goto err_regulator_disable;
 231                 }
 232
 233                 err = clk_prepare_enable(dev->lpo_clk);
 234                 if (err)
 235                         goto err_regulator_disable;
 236
 237                 err = clk_prepare_enable(dev->txco_clk);
 238                 if (err)
 239                         goto err_lpo_clk_disable;
 240         }
 241
 242         err = dev->set_shutdown(dev, powered);
 243         if (err)
 244                 goto err_txco_clk_disable;
 245
 246         err = dev->set_device_wakeup(dev, powered);
 247         if (err)
 248                 goto err_revert_shutdown;
 249
 250         if (!powered && dev->res_enabled) {
 251                 clk_disable_unprepare(dev->txco_clk);
 252                 clk_disable_unprepare(dev->lpo_clk);
 253
 254                 /* Intel Macs use bcm_apple_get_resources() and don't
 255                  * have regulator supplies configured.
 256                  */
 257                 if (dev->supplies[0].supply)
 258                         regulator_bulk_disable(BCM_NUM_SUPPLIES,
 259                                                dev->supplies);
 260         }
 261
 262         /* wait for device to power on and come out of reset */
 263         usleep_range(100000, 120000);
 264
 265         dev->res_enabled = powered;
 266
 267         return 0;
 268
 269 err_revert_shutdown:
 270         dev->set_shutdown(dev, !powered);
 271 err_txco_clk_disable:
 272         if (powered && !dev->res_enabled)
 273                 clk_disable_unprepare(dev->txco_clk);
 274 err_lpo_clk_disable:
 275         if (powered && !dev->res_enabled)
 276                 clk_disable_unprepare(dev->lpo_clk);
 277 err_regulator_disable:
 278         if (powered && !dev->res_enabled)
 279                 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
 280         return err;
 281 }
 282
 283 #ifdef CONFIG_PM
 284 static irqreturn_t bcm_host_wake(int irq, void *data)
 285 {
 286         struct bcm_device *bdev = data;
 287
 288         bt_dev_dbg(bdev, "Host wake IRQ");
 289
 290         pm_runtime_get(bdev->dev);
 291         pm_runtime_mark_last_busy(bdev->dev);
 292         pm_runtime_put_autosuspend(bdev->dev);
 293
 294         return IRQ_HANDLED;
 295 }
 296
 297 static int bcm_request_irq(struct bcm_data *bcm)
 298 {
 299         struct bcm_device *bdev = bcm->dev;
 300         int err;
 301
 302         mutex_lock(&bcm_device_lock);
 303         if (!bcm_device_exists(bdev)) {
 304                 err = -ENODEV;
 305                 goto unlock;
 306         }
 307
 308         if (bdev->irq <= 0) {
 309                 err = -EOPNOTSUPP;
 310                 goto unlock;
 311         }
 312
 313         err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
 314                                bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
 315                                                       IRQF_TRIGGER_RISING,
 316                                "host_wake", bdev);
 317         if (err) {
 318                 bdev->irq = err;
 319                 goto unlock;
 320         }
 321
 322         device_init_wakeup(bdev->dev, true);
 323
 324         pm_runtime_set_autosuspend_delay(bdev->dev,
 325                                          BCM_AUTOSUSPEND_DELAY);
 326         pm_runtime_use_autosuspend(bdev->dev);
 327         pm_runtime_set_active(bdev->dev);
 328         pm_runtime_enable(bdev->dev);
 329
 330 unlock:
 331         mutex_unlock(&bcm_device_lock);
 332
 333         return err;
 334 }
 335
 336 static const struct bcm_set_sleep_mode default_sleep_params = {
 337         .sleep_mode = 1,        /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
 338         .idle_host = 2,         /* idle threshold HOST, in 300ms */
 339         .idle_dev = 2,          /* idle threshold device, in 300ms */
 340         .bt_wake_active = 1,    /* BT_WAKE active mode: 1 = high, 0 = low */
 341         .host_wake_active = 0,  /* HOST_WAKE active mode: 1 = high, 0 = low */
 342         .allow_host_sleep = 1,  /* Allow host sleep in SCO flag */
 343         .combine_modes = 1,     /* Combine sleep and LPM flag */
 344         .tristate_control = 0,  /* Allow tri-state control of UART tx flag */
 345         /* Irrelevant USB flags */
 346         .usb_auto_sleep = 0,
 347         .usb_resume_timeout = 0,
 348         .break_to_host = 0,
 349         .pulsed_host_wake = 1,
 350 };
 351
 352 static int bcm_setup_sleep(struct hci_uart *hu)
 353 {
 354         struct bcm_data *bcm = hu->priv;
 355         struct sk_buff *skb;
 356         struct bcm_set_sleep_mode sleep_params = default_sleep_params;
 357
 358         sleep_params.host_wake_active = !bcm->dev->irq_active_low;
 359
 360         skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
 361                              &sleep_params, HCI_INIT_TIMEOUT);
 362         if (IS_ERR(skb)) {
 363                 int err = PTR_ERR(skb);
 364                 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
 365                 return err;
 366         }
 367         kfree_skb(skb);
 368
 369         bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
 370
 371         return 0;
 372 }
 373 #else
 374 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
 375 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
 376 #endif
 377
 378 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
 379 {
 380         struct hci_uart *hu = hci_get_drvdata(hdev);
 381         struct bcm_data *bcm = hu->priv;
 382         struct sk_buff *skb;
 383
 384         if (!test_bit(HCI_RUNNING, &hdev->flags))
 385                 return -ENETDOWN;
 386
 387         skb = bt_skb_alloc(3, GFP_KERNEL);
 388         if (!skb)
 389                 return -ENOMEM;
 390
 391         skb_put_u8(skb, BCM_LM_DIAG_PKT);
 392         skb_put_u8(skb, 0xf0);
 393         skb_put_u8(skb, enable);
 394
 395         skb_queue_tail(&bcm->txq, skb);
 396         hci_uart_tx_wakeup(hu);
 397
 398         return 0;
 399 }
 400
 401 static int bcm_open(struct hci_uart *hu)
 402 {
 403         struct bcm_data *bcm;
 404         struct list_head *p;
 405         int err;
 406
 407         bt_dev_dbg(hu->hdev, "hu %p", hu);
 408
 409         if (!hci_uart_has_flow_control(hu))
 410                 return -EOPNOTSUPP;
 411
 412         bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
 413         if (!bcm)
 414                 return -ENOMEM;
 415
 416         skb_queue_head_init(&bcm->txq);
 417
 418         hu->priv = bcm;
 419
 420         mutex_lock(&bcm_device_lock);
 421
 422         if (hu->serdev) {
 423                 bcm->dev = serdev_device_get_drvdata(hu->serdev);
 424                 goto out;
 425         }
 426
 427         if (!hu->tty->dev)
 428                 goto out;
 429
 430         list_for_each(p, &bcm_device_list) {
 431                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 432
 433                 /* Retrieve saved bcm_device based on parent of the
 434                  * platform device (saved during device probe) and
 435                  * parent of tty device used by hci_uart
 436                  */
 437                 if (hu->tty->dev->parent == dev->dev->parent) {
 438                         bcm->dev = dev;
 439 #ifdef CONFIG_PM
 440                         dev->hu = hu;
 441 #endif
 442                         break;
 443                 }
 444         }
 445
 446 out:
 447         if (bcm->dev) {
 448                 hci_uart_set_flow_control(hu, true);
 449                 hu->init_speed = bcm->dev->init_speed;
 450                 hu->oper_speed = bcm->dev->oper_speed;
 451                 err = bcm_gpio_set_power(bcm->dev, true);
 452                 hci_uart_set_flow_control(hu, false);
 453                 if (err)
 454                         goto err_unset_hu;
 455         }
 456
 457         mutex_unlock(&bcm_device_lock);
 458         return 0;
 459
 460 err_unset_hu:
 461 #ifdef CONFIG_PM
 462         if (!hu->serdev)
 463                 bcm->dev->hu = NULL;
 464 #endif
 465         mutex_unlock(&bcm_device_lock);
 466         hu->priv = NULL;
 467         kfree(bcm);
 468         return err;
 469 }
 470
 471 static int bcm_close(struct hci_uart *hu)
 472 {
 473         struct bcm_data *bcm = hu->priv;
 474         struct bcm_device *bdev = NULL;
 475         int err;
 476
 477         bt_dev_dbg(hu->hdev, "hu %p", hu);
 478
 479         /* Protect bcm->dev against removal of the device or driver */
 480         mutex_lock(&bcm_device_lock);
 481
 482         if (hu->serdev) {
 483                 bdev = serdev_device_get_drvdata(hu->serdev);
 484         } else if (bcm_device_exists(bcm->dev)) {
 485                 bdev = bcm->dev;
 486 #ifdef CONFIG_PM
 487                 bdev->hu = NULL;
 488 #endif
 489         }
 490
 491         if (bdev) {
 492                 if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
 493                         devm_free_irq(bdev->dev, bdev->irq, bdev);
 494                         device_init_wakeup(bdev->dev, false);
 495                         pm_runtime_disable(bdev->dev);
 496                 }
 497
 498                 err = bcm_gpio_set_power(bdev, false);
 499                 if (err)
 500                         bt_dev_err(hu->hdev, "Failed to power down");
 501                 else
 502                         pm_runtime_set_suspended(bdev->dev);
 503         }
 504         mutex_unlock(&bcm_device_lock);
 505
 506         skb_queue_purge(&bcm->txq);
 507         kfree_skb(bcm->rx_skb);
 508         kfree(bcm);
 509
 510         hu->priv = NULL;
 511         return 0;
 512 }
 513
 514 static int bcm_flush(struct hci_uart *hu)
 515 {
 516         struct bcm_data *bcm = hu->priv;
 517
 518         bt_dev_dbg(hu->hdev, "hu %p", hu);
 519
 520         skb_queue_purge(&bcm->txq);
 521
 522         return 0;
 523 }
 524
 525 static int bcm_setup(struct hci_uart *hu)
 526 {
 527         struct bcm_data *bcm = hu->priv;
 528         char fw_name[64];
 529         const struct firmware *fw;
 530         unsigned int speed;
 531         int err;
 532
 533         bt_dev_dbg(hu->hdev, "hu %p", hu);
 534
 535         hu->hdev->set_diag = bcm_set_diag;
 536         hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 537
 538         err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false);
 539         if (err)
 540                 return err;
 541
 542         err = request_firmware(&fw, fw_name, &hu->hdev->dev);
 543         if (err < 0) {
 544                 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
 545                 return 0;
 546         }
 547
 548         err = btbcm_patchram(hu->hdev, fw);
 549         if (err) {
 550                 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
 551                 goto finalize;
 552         }
 553
 554         /* Init speed if any */
 555         if (hu->init_speed)
 556                 speed = hu->init_speed;
 557         else if (hu->proto->init_speed)
 558                 speed = hu->proto->init_speed;
 559         else
 560                 speed = 0;
 561
 562         if (speed)
 563                 host_set_baudrate(hu, speed);
 564
 565         /* Operational speed if any */
 566         if (hu->oper_speed)
 567                 speed = hu->oper_speed;
 568         else if (hu->proto->oper_speed)
 569                 speed = hu->proto->oper_speed;
 570         else
 571                 speed = 0;
 572
 573         if (speed) {
 574                 err = bcm_set_baudrate(hu, speed);
 575                 if (!err)
 576                         host_set_baudrate(hu, speed);
 577         }
 578
 579 finalize:
 580         release_firmware(fw);
 581
 582         err = btbcm_finalize(hu->hdev);
 583         if (err)
 584                 return err;
 585
 586         if (!bcm_request_irq(bcm))
 587                 err = bcm_setup_sleep(hu);
 588
 589         return err;
 590 }
 591
 592 #define BCM_RECV_LM_DIAG \
 593         .type = BCM_LM_DIAG_PKT, \
 594         .hlen = BCM_LM_DIAG_SIZE, \
 595         .loff = 0, \
 596         .lsize = 0, \
 597         .maxlen = BCM_LM_DIAG_SIZE
 598
 599 #define BCM_RECV_NULL \
 600         .type = BCM_NULL_PKT, \
 601         .hlen = BCM_NULL_SIZE, \
 602         .loff = 0, \
 603         .lsize = 0, \
 604         .maxlen = BCM_NULL_SIZE
 605
 606 #define BCM_RECV_TYPE49 \
 607         .type = BCM_TYPE49_PKT, \
 608         .hlen = BCM_TYPE49_SIZE, \
 609         .loff = 0, \
 610         .lsize = 0, \
 611         .maxlen = BCM_TYPE49_SIZE
 612
 613 #define BCM_RECV_TYPE52 \
 614         .type = BCM_TYPE52_PKT, \
 615         .hlen = BCM_TYPE52_SIZE, \
 616         .loff = 0, \
 617         .lsize = 0, \
 618         .maxlen = BCM_TYPE52_SIZE
 619
 620 static const struct h4_recv_pkt bcm_recv_pkts[] = {
 621         { H4_RECV_ACL,      .recv = hci_recv_frame },
 622         { H4_RECV_SCO,      .recv = hci_recv_frame },
 623         { H4_RECV_EVENT,    .recv = hci_recv_frame },
 624         { BCM_RECV_LM_DIAG, .recv = hci_recv_diag  },
 625         { BCM_RECV_NULL,    .recv = hci_recv_diag  },
 626         { BCM_RECV_TYPE49,  .recv = hci_recv_diag  },
 627         { BCM_RECV_TYPE52,  .recv = hci_recv_diag  },
 628 };
 629
 630 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 631 {
 632         struct bcm_data *bcm = hu->priv;
 633
 634         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 635                 return -EUNATCH;
 636
 637         bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
 638                                   bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
 639         if (IS_ERR(bcm->rx_skb)) {
 640                 int err = PTR_ERR(bcm->rx_skb);
 641                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
 642                 bcm->rx_skb = NULL;
 643                 return err;
 644         } else if (!bcm->rx_skb) {
 645                 /* Delay auto-suspend when receiving completed packet */
 646                 mutex_lock(&bcm_device_lock);
 647                 if (bcm->dev && bcm_device_exists(bcm->dev)) {
 648                         pm_runtime_get(bcm->dev->dev);
 649                         pm_runtime_mark_last_busy(bcm->dev->dev);
 650                         pm_runtime_put_autosuspend(bcm->dev->dev);
 651                 }
 652                 mutex_unlock(&bcm_device_lock);
 653         }
 654
 655         return count;
 656 }
 657
 658 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 659 {
 660         struct bcm_data *bcm = hu->priv;
 661
 662         bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
 663
 664         /* Prepend skb with frame type */
 665         memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 666         skb_queue_tail(&bcm->txq, skb);
 667
 668         return 0;
 669 }
 670
 671 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
 672 {
 673         struct bcm_data *bcm = hu->priv;
 674         struct sk_buff *skb = NULL;
 675         struct bcm_device *bdev = NULL;
 676
 677         mutex_lock(&bcm_device_lock);
 678
 679         if (bcm_device_exists(bcm->dev)) {
 680                 bdev = bcm->dev;
 681                 pm_runtime_get_sync(bdev->dev);
 682                 /* Shall be resumed here */
 683         }
 684
 685         skb = skb_dequeue(&bcm->txq);
 686
 687         if (bdev) {
 688                 pm_runtime_mark_last_busy(bdev->dev);
 689                 pm_runtime_put_autosuspend(bdev->dev);
 690         }
 691
 692         mutex_unlock(&bcm_device_lock);
 693
 694         return skb;
 695 }
 696
 697 #ifdef CONFIG_PM
 698 static int bcm_suspend_device(struct device *dev)
 699 {
 700         struct bcm_device *bdev = dev_get_drvdata(dev);
 701         int err;
 702
 703         bt_dev_dbg(bdev, "");
 704
 705         if (!bdev->is_suspended && bdev->hu) {
 706                 hci_uart_set_flow_control(bdev->hu, true);
 707
 708                 /* Once this returns, driver suspends BT via GPIO */
 709                 bdev->is_suspended = true;
 710         }
 711
 712         /* Suspend the device */
 713         err = bdev->set_device_wakeup(bdev, false);
 714         if (err) {
 715                 if (bdev->is_suspended && bdev->hu) {
 716                         bdev->is_suspended = false;
 717                         hci_uart_set_flow_control(bdev->hu, false);
 718                 }
 719                 return -EBUSY;
 720         }
 721
 722         bt_dev_dbg(bdev, "suspend, delaying 15 ms");
 723         msleep(15);
 724
 725         return 0;
 726 }
 727
 728 static int bcm_resume_device(struct device *dev)
 729 {
 730         struct bcm_device *bdev = dev_get_drvdata(dev);
 731         int err;
 732
 733         bt_dev_dbg(bdev, "");
 734
 735         err = bdev->set_device_wakeup(bdev, true);
 736         if (err) {
 737                 dev_err(dev, "Failed to power up\n");
 738                 return err;
 739         }
 740
 741         bt_dev_dbg(bdev, "resume, delaying 15 ms");
 742         msleep(15);
 743
 744         /* When this executes, the device has woken up already */
 745         if (bdev->is_suspended && bdev->hu) {
 746                 bdev->is_suspended = false;
 747
 748                 hci_uart_set_flow_control(bdev->hu, false);
 749         }
 750
 751         return 0;
 752 }
 753 #endif
 754
 755 #ifdef CONFIG_PM_SLEEP
 756 /* suspend callback */
 757 static int bcm_suspend(struct device *dev)
 758 {
 759         struct bcm_device *bdev = dev_get_drvdata(dev);
 760         int error;
 761
 762         bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
 763
 764         /*
 765          * When used with a device instantiated as platform_device, bcm_suspend
 766          * can be called at any time as long as the platform device is bound,
 767          * so it should use bcm_device_lock to protect access to hci_uart
 768          * and device_wake-up GPIO.
 769          */
 770         mutex_lock(&bcm_device_lock);
 771
 772         if (!bdev->hu)
 773                 goto unlock;
 774
 775         if (pm_runtime_active(dev))
 776                 bcm_suspend_device(dev);
 777
 778         if (device_may_wakeup(dev) && bdev->irq > 0) {
 779                 error = enable_irq_wake(bdev->irq);
 780                 if (!error)
 781                         bt_dev_dbg(bdev, "BCM irq: enabled");
 782         }
 783
 784 unlock:
 785         mutex_unlock(&bcm_device_lock);
 786
 787         return 0;
 788 }
 789
 790 /* resume callback */
 791 static int bcm_resume(struct device *dev)
 792 {
 793         struct bcm_device *bdev = dev_get_drvdata(dev);
 794         int err = 0;
 795
 796         bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
 797
 798         /*
 799          * When used with a device instantiated as platform_device, bcm_resume
 800          * can be called at any time as long as platform device is bound,
 801          * so it should use bcm_device_lock to protect access to hci_uart
 802          * and device_wake-up GPIO.
 803          */
 804         mutex_lock(&bcm_device_lock);
 805
 806         if (!bdev->hu)
 807                 goto unlock;
 808
 809         if (device_may_wakeup(dev) && bdev->irq > 0) {
 810                 disable_irq_wake(bdev->irq);
 811                 bt_dev_dbg(bdev, "BCM irq: disabled");
 812         }
 813
 814         err = bcm_resume_device(dev);
 815
 816 unlock:
 817         mutex_unlock(&bcm_device_lock);
 818
 819         if (!err) {
 820                 pm_runtime_disable(dev);
 821                 pm_runtime_set_active(dev);
 822                 pm_runtime_enable(dev);
 823         }
 824
 825         return 0;
 826 }
 827 #endif
 828
 829 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
 830 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
 831         {
 832                 .ident = "Meegopad T08",
 833                 .matches = {
 834                         DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
 835                                         "To be filled by OEM."),
 836                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
 837                         DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
 838                 },
 839         },
 840         { }
 841 };
 842
 843 #ifdef CONFIG_ACPI
 844 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
 845 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
 846 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
 847
 848 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
 849         { "device-wakeup-gpios", &first_gpio, 1 },
 850         { "shutdown-gpios", &second_gpio, 1 },
 851         { "host-wakeup-gpios", &third_gpio, 1 },
 852         { },
 853 };
 854
 855 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
 856         { "host-wakeup-gpios", &first_gpio, 1 },
 857         { "device-wakeup-gpios", &second_gpio, 1 },
 858         { "shutdown-gpios", &third_gpio, 1 },
 859         { },
 860 };
 861
 862 static int bcm_resource(struct acpi_resource *ares, void *data)
 863 {
 864         struct bcm_device *dev = data;
 865         struct acpi_resource_extended_irq *irq;
 866         struct acpi_resource_gpio *gpio;
 867         struct acpi_resource_uart_serialbus *sb;
 868
 869         switch (ares->type) {
 870         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 871                 irq = &ares->data.extended_irq;
 872                 if (irq->polarity != ACPI_ACTIVE_LOW)
 873                         dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
 874                 dev->irq_active_low = true;
 875                 break;
 876
 877         case ACPI_RESOURCE_TYPE_GPIO:
 878                 gpio = &ares->data.gpio;
 879                 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
 880                         dev->gpio_int_idx = dev->gpio_count;
 881                         dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
 882                 }
 883                 dev->gpio_count++;
 884                 break;
 885
 886         case ACPI_RESOURCE_TYPE_SERIAL_BUS:
 887                 sb = &ares->data.uart_serial_bus;
 888                 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
 889                         dev->init_speed = sb->default_baud_rate;
 890                         dev->oper_speed = 4000000;
 891                 }
 892                 break;
 893
 894         default:
 895                 break;
 896         }
 897
 898         return 0;
 899 }
 900
 901 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
 902 {
 903         if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
 904                 return -EIO;
 905
 906         return 0;
 907 }
 908
 909 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
 910 {
 911         if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
 912                                               NULL, NULL, NULL)))
 913                 return -EIO;
 914
 915         return 0;
 916 }
 917
 918 static int bcm_apple_get_resources(struct bcm_device *dev)
 919 {
 920         struct acpi_device *adev = ACPI_COMPANION(dev->dev);
 921         const union acpi_object *obj;
 922
 923         if (!adev ||
 924             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
 925             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
 926             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
 927                 return -ENODEV;
 928
 929         if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
 930             obj->buffer.length == 8)
 931                 dev->init_speed = *(u64 *)obj->buffer.pointer;
 932
 933         dev->set_device_wakeup = bcm_apple_set_device_wakeup;
 934         dev->set_shutdown = bcm_apple_set_shutdown;
 935
 936         return 0;
 937 }
 938 #else
 939 static inline int bcm_apple_get_resources(struct bcm_device *dev)
 940 {
 941         return -EOPNOTSUPP;
 942 }
 943 #endif /* CONFIG_ACPI */
 944
 945 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
 946 {
 947         gpiod_set_value_cansleep(dev->device_wakeup, awake);
 948         return 0;
 949 }
 950
 951 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
 952 {
 953         gpiod_set_value_cansleep(dev->shutdown, powered);
 954         return 0;
 955 }
 956
 957 /* Try a bunch of names for TXCO */
 958 static struct clk *bcm_get_txco(struct device *dev)
 959 {
 960         struct clk *clk;
 961
 962         /* New explicit name */
 963         clk = devm_clk_get(dev, "txco");
 964         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
 965                 return clk;
 966
 967         /* Deprecated name */
 968         clk = devm_clk_get(dev, "extclk");
 969         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
 970                 return clk;
 971
 972         /* Original code used no name at all */
 973         return devm_clk_get(dev, NULL);
 974 }
 975
 976 static int bcm_get_resources(struct bcm_device *dev)
 977 {
 978         const struct dmi_system_id *dmi_id;
 979         int err;
 980
 981         dev->name = dev_name(dev->dev);
 982
 983         if (x86_apple_machine && !bcm_apple_get_resources(dev))
 984                 return 0;
 985
 986         dev->txco_clk = bcm_get_txco(dev->dev);
 987
 988         /* Handle deferred probing */
 989         if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
 990                 return PTR_ERR(dev->txco_clk);
 991
 992         /* Ignore all other errors as before */
 993         if (IS_ERR(dev->txco_clk))
 994                 dev->txco_clk = NULL;
 995
 996         dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
 997         if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
 998                 return PTR_ERR(dev->lpo_clk);
 999
1000         if (IS_ERR(dev->lpo_clk))
1001                 dev->lpo_clk = NULL;
1002
1003         /* Check if we accidentally fetched the lpo clock twice */
1004         if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1005                 devm_clk_put(dev->dev, dev->txco_clk);
1006                 dev->txco_clk = NULL;
1007         }
1008
1009         dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1010                                                      GPIOD_OUT_LOW);
1011         if (IS_ERR(dev->device_wakeup))
1012                 return PTR_ERR(dev->device_wakeup);
1013
1014         dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1015                                                 GPIOD_OUT_LOW);
1016         if (IS_ERR(dev->shutdown))
1017                 return PTR_ERR(dev->shutdown);
1018
1019         dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1020         dev->set_shutdown = bcm_gpio_set_shutdown;
1021
1022         dev->supplies[0].supply = "vbat";
1023         dev->supplies[1].supply = "vddio";
1024         err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1025                                       dev->supplies);
1026         if (err)
1027                 return err;
1028
1029         /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1030         if (dev->irq <= 0) {
1031                 struct gpio_desc *gpio;
1032
1033                 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1034                                                GPIOD_IN);
1035                 if (IS_ERR(gpio))
1036                         return PTR_ERR(gpio);
1037
1038                 dev->irq = gpiod_to_irq(gpio);
1039         }
1040
1041         dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1042         if (dmi_id) {
1043                 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1044                          dmi_id->ident);
1045                 dev->irq = 0;
1046         }
1047
1048         dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1049         return 0;
1050 }
1051
1052 #ifdef CONFIG_ACPI
1053 static int bcm_acpi_probe(struct bcm_device *dev)
1054 {
1055         LIST_HEAD(resources);
1056         const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1057         struct resource_entry *entry;
1058         int ret;
1059
1060         /* Retrieve UART ACPI info */
1061         dev->gpio_int_idx = -1;
1062         ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1063                                      &resources, bcm_resource, dev);
1064         if (ret < 0)
1065                 return ret;
1066
1067         resource_list_for_each_entry(entry, &resources) {
1068                 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1069                         dev->irq = entry->res->start;
1070                         break;
1071                 }
1072         }
1073         acpi_dev_free_resource_list(&resources);
1074
1075         /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1076          * only 2 GPIO resources, we use the irq-last mapping for this, since
1077          * we already have an irq the 3th / last mapping will not be used.
1078          */
1079         if (dev->irq)
1080                 gpio_mapping = acpi_bcm_int_last_gpios;
1081         else if (dev->gpio_int_idx == 0)
1082                 gpio_mapping = acpi_bcm_int_first_gpios;
1083         else if (dev->gpio_int_idx == 2)
1084                 gpio_mapping = acpi_bcm_int_last_gpios;
1085         else
1086                 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1087                          dev->gpio_int_idx);
1088
1089         /* Warn if our expectations are not met. */
1090         if (dev->gpio_count != (dev->irq ? 2 : 3))
1091                 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1092                          dev->gpio_count);
1093
1094         ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1095         if (ret)
1096                 return ret;
1097
1098         if (irq_polarity != -1) {
1099                 dev->irq_active_low = irq_polarity;
1100                 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1101                          dev->irq_active_low ? "low" : "high");
1102         }
1103
1104         return 0;
1105 }
1106 #else
1107 static int bcm_acpi_probe(struct bcm_device *dev)
1108 {
1109         return -EINVAL;
1110 }
1111 #endif /* CONFIG_ACPI */
1112
1113 static int bcm_of_probe(struct bcm_device *bdev)
1114 {
1115         device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1116         return 0;
1117 }
1118
1119 static int bcm_probe(struct platform_device *pdev)
1120 {
1121         struct bcm_device *dev;
1122         int ret;
1123
1124         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1125         if (!dev)
1126                 return -ENOMEM;
1127
1128         dev->dev = &pdev->dev;
1129         dev->irq = platform_get_irq(pdev, 0);
1130
1131         if (has_acpi_companion(&pdev->dev)) {
1132                 ret = bcm_acpi_probe(dev);
1133                 if (ret)
1134                         return ret;
1135         }
1136
1137         ret = bcm_get_resources(dev);
1138         if (ret)
1139                 return ret;
1140
1141         platform_set_drvdata(pdev, dev);
1142
1143         dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1144
1145         /* Place this instance on the device list */
1146         mutex_lock(&bcm_device_lock);
1147         list_add_tail(&dev->list, &bcm_device_list);
1148         mutex_unlock(&bcm_device_lock);
1149
1150         ret = bcm_gpio_set_power(dev, false);
1151         if (ret)
1152                 dev_err(&pdev->dev, "Failed to power down\n");
1153
1154         return 0;
1155 }
1156
1157 static int bcm_remove(struct platform_device *pdev)
1158 {
1159         struct bcm_device *dev = platform_get_drvdata(pdev);
1160
1161         mutex_lock(&bcm_device_lock);
1162         list_del(&dev->list);
1163         mutex_unlock(&bcm_device_lock);
1164
1165         dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1166
1167         return 0;
1168 }
1169
1170 static const struct hci_uart_proto bcm_proto = {
1171         .id             = HCI_UART_BCM,
1172         .name           = "Broadcom",
1173         .manufacturer   = 15,
1174         .init_speed     = 115200,
1175         .open           = bcm_open,
1176         .close          = bcm_close,
1177         .flush          = bcm_flush,
1178         .setup          = bcm_setup,
1179         .set_baudrate   = bcm_set_baudrate,
1180         .recv           = bcm_recv,
1181         .enqueue        = bcm_enqueue,
1182         .dequeue        = bcm_dequeue,
1183 };
1184
1185 #ifdef CONFIG_ACPI
1186 static const struct acpi_device_id bcm_acpi_match[] = {
1187         { "BCM2E00" },
1188         { "BCM2E01" },
1189         { "BCM2E02" },
1190         { "BCM2E03" },
1191         { "BCM2E04" },
1192         { "BCM2E05" },
1193         { "BCM2E06" },
1194         { "BCM2E07" },
1195         { "BCM2E08" },
1196         { "BCM2E09" },
1197         { "BCM2E0A" },
1198         { "BCM2E0B" },
1199         { "BCM2E0C" },
1200         { "BCM2E0D" },
1201         { "BCM2E0E" },
1202         { "BCM2E0F" },
1203         { "BCM2E10" },
1204         { "BCM2E11" },
1205         { "BCM2E12" },
1206         { "BCM2E13" },
1207         { "BCM2E14" },
1208         { "BCM2E15" },
1209         { "BCM2E16" },
1210         { "BCM2E17" },
1211         { "BCM2E18" },
1212         { "BCM2E19" },
1213         { "BCM2E1A" },
1214         { "BCM2E1B" },
1215         { "BCM2E1C" },
1216         { "BCM2E1D" },
1217         { "BCM2E1F" },
1218         { "BCM2E20" },
1219         { "BCM2E21" },
1220         { "BCM2E22" },
1221         { "BCM2E23" },
1222         { "BCM2E24" },
1223         { "BCM2E25" },
1224         { "BCM2E26" },
1225         { "BCM2E27" },
1226         { "BCM2E28" },
1227         { "BCM2E29" },
1228         { "BCM2E2A" },
1229         { "BCM2E2B" },
1230         { "BCM2E2C" },
1231         { "BCM2E2D" },
1232         { "BCM2E2E" },
1233         { "BCM2E2F" },
1234         { "BCM2E30" },
1235         { "BCM2E31" },
1236         { "BCM2E32" },
1237         { "BCM2E33" },
1238         { "BCM2E34" },
1239         { "BCM2E35" },
1240         { "BCM2E36" },
1241         { "BCM2E37" },
1242         { "BCM2E38" },
1243         { "BCM2E39" },
1244         { "BCM2E3A" },
1245         { "BCM2E3B" },
1246         { "BCM2E3C" },
1247         { "BCM2E3D" },
1248         { "BCM2E3E" },
1249         { "BCM2E3F" },
1250         { "BCM2E40" },
1251         { "BCM2E41" },
1252         { "BCM2E42" },
1253         { "BCM2E43" },
1254         { "BCM2E44" },
1255         { "BCM2E45" },
1256         { "BCM2E46" },
1257         { "BCM2E47" },
1258         { "BCM2E48" },
1259         { "BCM2E49" },
1260         { "BCM2E4A" },
1261         { "BCM2E4B" },
1262         { "BCM2E4C" },
1263         { "BCM2E4D" },
1264         { "BCM2E4E" },
1265         { "BCM2E4F" },
1266         { "BCM2E50" },
1267         { "BCM2E51" },
1268         { "BCM2E52" },
1269         { "BCM2E53" },
1270         { "BCM2E54" },
1271         { "BCM2E55" },
1272         { "BCM2E56" },
1273         { "BCM2E57" },
1274         { "BCM2E58" },
1275         { "BCM2E59" },
1276         { "BCM2E5A" },
1277         { "BCM2E5B" },
1278         { "BCM2E5C" },
1279         { "BCM2E5D" },
1280         { "BCM2E5E" },
1281         { "BCM2E5F" },
1282         { "BCM2E60" },
1283         { "BCM2E61" },
1284         { "BCM2E62" },
1285         { "BCM2E63" },
1286         { "BCM2E64" },
1287         { "BCM2E65" },
1288         { "BCM2E66" },
1289         { "BCM2E67" },
1290         { "BCM2E68" },
1291         { "BCM2E69" },
1292         { "BCM2E6B" },
1293         { "BCM2E6D" },
1294         { "BCM2E6E" },
1295         { "BCM2E6F" },
1296         { "BCM2E70" },
1297         { "BCM2E71" },
1298         { "BCM2E72" },
1299         { "BCM2E73" },
1300         { "BCM2E74" },
1301         { "BCM2E75" },
1302         { "BCM2E76" },
1303         { "BCM2E77" },
1304         { "BCM2E78" },
1305         { "BCM2E79" },
1306         { "BCM2E7A" },
1307         { "BCM2E7B" },
1308         { "BCM2E7C" },
1309         { "BCM2E7D" },
1310         { "BCM2E7E" },
1311         { "BCM2E7F" },
1312         { "BCM2E80" },
1313         { "BCM2E81" },
1314         { "BCM2E82" },
1315         { "BCM2E83" },
1316         { "BCM2E84" },
1317         { "BCM2E85" },
1318         { "BCM2E86" },
1319         { "BCM2E87" },
1320         { "BCM2E88" },
1321         { "BCM2E89" },
1322         { "BCM2E8A" },
1323         { "BCM2E8B" },
1324         { "BCM2E8C" },
1325         { "BCM2E8D" },
1326         { "BCM2E8E" },
1327         { "BCM2E90" },
1328         { "BCM2E92" },
1329         { "BCM2E93" },
1330         { "BCM2E94" },
1331         { "BCM2E95" },
1332         { "BCM2E96" },
1333         { "BCM2E97" },
1334         { "BCM2E98" },
1335         { "BCM2E99" },
1336         { "BCM2E9A" },
1337         { "BCM2E9B" },
1338         { "BCM2E9C" },
1339         { "BCM2E9D" },
1340         { "BCM2EA0" },
1341         { "BCM2EA1" },
1342         { "BCM2EA2" },
1343         { "BCM2EA3" },
1344         { "BCM2EA4" },
1345         { "BCM2EA5" },
1346         { "BCM2EA6" },
1347         { "BCM2EA7" },
1348         { "BCM2EA8" },
1349         { "BCM2EA9" },
1350         { "BCM2EAA" },
1351         { "BCM2EAB" },
1352         { "BCM2EAC" },
1353         { },
1354 };
1355 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1356 #endif
1357
1358 /* suspend and resume callbacks */
1359 static const struct dev_pm_ops bcm_pm_ops = {
1360         SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1361         SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1362 };
1363
1364 static struct platform_driver bcm_driver = {
1365         .probe = bcm_probe,
1366         .remove = bcm_remove,
1367         .driver = {
1368                 .name = "hci_bcm",
1369                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1370                 .pm = &bcm_pm_ops,
1371         },
1372 };
1373
1374 static int bcm_serdev_probe(struct serdev_device *serdev)
1375 {
1376         struct bcm_device *bcmdev;
1377         int err;
1378
1379         bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1380         if (!bcmdev)
1381                 return -ENOMEM;
1382
1383         bcmdev->dev = &serdev->dev;
1384 #ifdef CONFIG_PM
1385         bcmdev->hu = &bcmdev->serdev_hu;
1386 #endif
1387         bcmdev->serdev_hu.serdev = serdev;
1388         serdev_device_set_drvdata(serdev, bcmdev);
1389
1390         if (has_acpi_companion(&serdev->dev))
1391                 err = bcm_acpi_probe(bcmdev);
1392         else
1393                 err = bcm_of_probe(bcmdev);
1394         if (err)
1395                 return err;
1396
1397         err = bcm_get_resources(bcmdev);
1398         if (err)
1399                 return err;
1400
1401         if (!bcmdev->shutdown) {
1402                 dev_warn(&serdev->dev,
1403                          "No reset resource, using default baud rate\n");
1404                 bcmdev->oper_speed = bcmdev->init_speed;
1405         }
1406
1407         err = bcm_gpio_set_power(bcmdev, false);
1408         if (err)
1409                 dev_err(&serdev->dev, "Failed to power down\n");
1410
1411         return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1412 }
1413
1414 static void bcm_serdev_remove(struct serdev_device *serdev)
1415 {
1416         struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1417
1418         hci_uart_unregister_device(&bcmdev->serdev_hu);
1419 }
1420
1421 #ifdef CONFIG_OF
1422 static const struct of_device_id bcm_bluetooth_of_match[] = {
1423         { .compatible = "brcm,bcm20702a1" },
1424         { .compatible = "brcm,bcm4345c5" },
1425         { .compatible = "brcm,bcm4330-bt" },
1426         { .compatible = "brcm,bcm43438-bt" },
1427         { .compatible = "brcm,bcm43540-bt" },
1428         { .compatible = "brcm,bcm4335a0" },
1429         { },
1430 };
1431 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1432 #endif
1433
1434 static struct serdev_device_driver bcm_serdev_driver = {
1435         .probe = bcm_serdev_probe,
1436         .remove = bcm_serdev_remove,
1437         .driver = {
1438                 .name = "hci_uart_bcm",
1439                 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1440                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1441                 .pm = &bcm_pm_ops,
1442         },
1443 };
1444
1445 int __init bcm_init(void)
1446 {
1447         /* For now, we need to keep both platform device
1448          * driver (ACPI generated) and serdev driver (DT).
1449          */
1450         platform_driver_register(&bcm_driver);
1451         serdev_device_driver_register(&bcm_serdev_driver);
1452
1453         return hci_uart_register_proto(&bcm_proto);
1454 }
1455
1456 int __exit bcm_deinit(void)
1457 {
1458         platform_driver_unregister(&bcm_driver);
1459         serdev_device_driver_unregister(&bcm_serdev_driver);
1460
1461         return hci_uart_unregister_proto(&bcm_proto);
1462 }