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(10000, 20000);
 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         bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
 410         if (!bcm)
 411                 return -ENOMEM;
 412
 413         skb_queue_head_init(&bcm->txq);
 414
 415         hu->priv = bcm;
 416
 417         mutex_lock(&bcm_device_lock);
 418
 419         if (hu->serdev) {
 420                 bcm->dev = serdev_device_get_drvdata(hu->serdev);
 421                 goto out;
 422         }
 423
 424         if (!hu->tty->dev)
 425                 goto out;
 426
 427         list_for_each(p, &bcm_device_list) {
 428                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 429
 430                 /* Retrieve saved bcm_device based on parent of the
 431                  * platform device (saved during device probe) and
 432                  * parent of tty device used by hci_uart
 433                  */
 434                 if (hu->tty->dev->parent == dev->dev->parent) {
 435                         bcm->dev = dev;
 436 #ifdef CONFIG_PM
 437                         dev->hu = hu;
 438 #endif
 439                         break;
 440                 }
 441         }
 442
 443 out:
 444         if (bcm->dev) {
 445                 hu->init_speed = bcm->dev->init_speed;
 446                 hu->oper_speed = bcm->dev->oper_speed;
 447                 err = bcm_gpio_set_power(bcm->dev, true);
 448                 if (err)
 449                         goto err_unset_hu;
 450         }
 451
 452         mutex_unlock(&bcm_device_lock);
 453         return 0;
 454
 455 err_unset_hu:
 456 #ifdef CONFIG_PM
 457         if (!hu->serdev)
 458                 bcm->dev->hu = NULL;
 459 #endif
 460         mutex_unlock(&bcm_device_lock);
 461         hu->priv = NULL;
 462         kfree(bcm);
 463         return err;
 464 }
 465
 466 static int bcm_close(struct hci_uart *hu)
 467 {
 468         struct bcm_data *bcm = hu->priv;
 469         struct bcm_device *bdev = NULL;
 470         int err;
 471
 472         bt_dev_dbg(hu->hdev, "hu %p", hu);
 473
 474         /* Protect bcm->dev against removal of the device or driver */
 475         mutex_lock(&bcm_device_lock);
 476
 477         if (hu->serdev) {
 478                 bdev = serdev_device_get_drvdata(hu->serdev);
 479         } else if (bcm_device_exists(bcm->dev)) {
 480                 bdev = bcm->dev;
 481 #ifdef CONFIG_PM
 482                 bdev->hu = NULL;
 483 #endif
 484         }
 485
 486         if (bdev) {
 487                 if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
 488                         devm_free_irq(bdev->dev, bdev->irq, bdev);
 489                         device_init_wakeup(bdev->dev, false);
 490                         pm_runtime_disable(bdev->dev);
 491                 }
 492
 493                 err = bcm_gpio_set_power(bdev, false);
 494                 if (err)
 495                         bt_dev_err(hu->hdev, "Failed to power down");
 496                 else
 497                         pm_runtime_set_suspended(bdev->dev);
 498         }
 499         mutex_unlock(&bcm_device_lock);
 500
 501         skb_queue_purge(&bcm->txq);
 502         kfree_skb(bcm->rx_skb);
 503         kfree(bcm);
 504
 505         hu->priv = NULL;
 506         return 0;
 507 }
 508
 509 static int bcm_flush(struct hci_uart *hu)
 510 {
 511         struct bcm_data *bcm = hu->priv;
 512
 513         bt_dev_dbg(hu->hdev, "hu %p", hu);
 514
 515         skb_queue_purge(&bcm->txq);
 516
 517         return 0;
 518 }
 519
 520 static int bcm_setup(struct hci_uart *hu)
 521 {
 522         struct bcm_data *bcm = hu->priv;
 523         char fw_name[64];
 524         const struct firmware *fw;
 525         unsigned int speed;
 526         int err;
 527
 528         bt_dev_dbg(hu->hdev, "hu %p", hu);
 529
 530         hu->hdev->set_diag = bcm_set_diag;
 531         hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 532
 533         err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false);
 534         if (err)
 535                 return err;
 536
 537         err = request_firmware(&fw, fw_name, &hu->hdev->dev);
 538         if (err < 0) {
 539                 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
 540                 return 0;
 541         }
 542
 543         err = btbcm_patchram(hu->hdev, fw);
 544         if (err) {
 545                 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
 546                 goto finalize;
 547         }
 548
 549         /* Init speed if any */
 550         if (hu->init_speed)
 551                 speed = hu->init_speed;
 552         else if (hu->proto->init_speed)
 553                 speed = hu->proto->init_speed;
 554         else
 555                 speed = 0;
 556
 557         if (speed)
 558                 host_set_baudrate(hu, speed);
 559
 560         /* Operational speed if any */
 561         if (hu->oper_speed)
 562                 speed = hu->oper_speed;
 563         else if (hu->proto->oper_speed)
 564                 speed = hu->proto->oper_speed;
 565         else
 566                 speed = 0;
 567
 568         if (speed) {
 569                 err = bcm_set_baudrate(hu, speed);
 570                 if (!err)
 571                         host_set_baudrate(hu, speed);
 572         }
 573
 574 finalize:
 575         release_firmware(fw);
 576
 577         err = btbcm_finalize(hu->hdev);
 578         if (err)
 579                 return err;
 580
 581         if (!bcm_request_irq(bcm))
 582                 err = bcm_setup_sleep(hu);
 583
 584         return err;
 585 }
 586
 587 #define BCM_RECV_LM_DIAG \
 588         .type = BCM_LM_DIAG_PKT, \
 589         .hlen = BCM_LM_DIAG_SIZE, \
 590         .loff = 0, \
 591         .lsize = 0, \
 592         .maxlen = BCM_LM_DIAG_SIZE
 593
 594 #define BCM_RECV_NULL \
 595         .type = BCM_NULL_PKT, \
 596         .hlen = BCM_NULL_SIZE, \
 597         .loff = 0, \
 598         .lsize = 0, \
 599         .maxlen = BCM_NULL_SIZE
 600
 601 #define BCM_RECV_TYPE49 \
 602         .type = BCM_TYPE49_PKT, \
 603         .hlen = BCM_TYPE49_SIZE, \
 604         .loff = 0, \
 605         .lsize = 0, \
 606         .maxlen = BCM_TYPE49_SIZE
 607
 608 #define BCM_RECV_TYPE52 \
 609         .type = BCM_TYPE52_PKT, \
 610         .hlen = BCM_TYPE52_SIZE, \
 611         .loff = 0, \
 612         .lsize = 0, \
 613         .maxlen = BCM_TYPE52_SIZE
 614
 615 static const struct h4_recv_pkt bcm_recv_pkts[] = {
 616         { H4_RECV_ACL,      .recv = hci_recv_frame },
 617         { H4_RECV_SCO,      .recv = hci_recv_frame },
 618         { H4_RECV_EVENT,    .recv = hci_recv_frame },
 619         { BCM_RECV_LM_DIAG, .recv = hci_recv_diag  },
 620         { BCM_RECV_NULL,    .recv = hci_recv_diag  },
 621         { BCM_RECV_TYPE49,  .recv = hci_recv_diag  },
 622         { BCM_RECV_TYPE52,  .recv = hci_recv_diag  },
 623 };
 624
 625 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 626 {
 627         struct bcm_data *bcm = hu->priv;
 628
 629         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 630                 return -EUNATCH;
 631
 632         bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
 633                                   bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
 634         if (IS_ERR(bcm->rx_skb)) {
 635                 int err = PTR_ERR(bcm->rx_skb);
 636                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
 637                 bcm->rx_skb = NULL;
 638                 return err;
 639         } else if (!bcm->rx_skb) {
 640                 /* Delay auto-suspend when receiving completed packet */
 641                 mutex_lock(&bcm_device_lock);
 642                 if (bcm->dev && bcm_device_exists(bcm->dev)) {
 643                         pm_runtime_get(bcm->dev->dev);
 644                         pm_runtime_mark_last_busy(bcm->dev->dev);
 645                         pm_runtime_put_autosuspend(bcm->dev->dev);
 646                 }
 647                 mutex_unlock(&bcm_device_lock);
 648         }
 649
 650         return count;
 651 }
 652
 653 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 654 {
 655         struct bcm_data *bcm = hu->priv;
 656
 657         bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
 658
 659         /* Prepend skb with frame type */
 660         memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 661         skb_queue_tail(&bcm->txq, skb);
 662
 663         return 0;
 664 }
 665
 666 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
 667 {
 668         struct bcm_data *bcm = hu->priv;
 669         struct sk_buff *skb = NULL;
 670         struct bcm_device *bdev = NULL;
 671
 672         mutex_lock(&bcm_device_lock);
 673
 674         if (bcm_device_exists(bcm->dev)) {
 675                 bdev = bcm->dev;
 676                 pm_runtime_get_sync(bdev->dev);
 677                 /* Shall be resumed here */
 678         }
 679
 680         skb = skb_dequeue(&bcm->txq);
 681
 682         if (bdev) {
 683                 pm_runtime_mark_last_busy(bdev->dev);
 684                 pm_runtime_put_autosuspend(bdev->dev);
 685         }
 686
 687         mutex_unlock(&bcm_device_lock);
 688
 689         return skb;
 690 }
 691
 692 #ifdef CONFIG_PM
 693 static int bcm_suspend_device(struct device *dev)
 694 {
 695         struct bcm_device *bdev = dev_get_drvdata(dev);
 696         int err;
 697
 698         bt_dev_dbg(bdev, "");
 699
 700         if (!bdev->is_suspended && bdev->hu) {
 701                 hci_uart_set_flow_control(bdev->hu, true);
 702
 703                 /* Once this returns, driver suspends BT via GPIO */
 704                 bdev->is_suspended = true;
 705         }
 706
 707         /* Suspend the device */
 708         err = bdev->set_device_wakeup(bdev, false);
 709         if (err) {
 710                 if (bdev->is_suspended && bdev->hu) {
 711                         bdev->is_suspended = false;
 712                         hci_uart_set_flow_control(bdev->hu, false);
 713                 }
 714                 return -EBUSY;
 715         }
 716
 717         bt_dev_dbg(bdev, "suspend, delaying 15 ms");
 718         msleep(15);
 719
 720         return 0;
 721 }
 722
 723 static int bcm_resume_device(struct device *dev)
 724 {
 725         struct bcm_device *bdev = dev_get_drvdata(dev);
 726         int err;
 727
 728         bt_dev_dbg(bdev, "");
 729
 730         err = bdev->set_device_wakeup(bdev, true);
 731         if (err) {
 732                 dev_err(dev, "Failed to power up\n");
 733                 return err;
 734         }
 735
 736         bt_dev_dbg(bdev, "resume, delaying 15 ms");
 737         msleep(15);
 738
 739         /* When this executes, the device has woken up already */
 740         if (bdev->is_suspended && bdev->hu) {
 741                 bdev->is_suspended = false;
 742
 743                 hci_uart_set_flow_control(bdev->hu, false);
 744         }
 745
 746         return 0;
 747 }
 748 #endif
 749
 750 #ifdef CONFIG_PM_SLEEP
 751 /* suspend callback */
 752 static int bcm_suspend(struct device *dev)
 753 {
 754         struct bcm_device *bdev = dev_get_drvdata(dev);
 755         int error;
 756
 757         bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
 758
 759         /*
 760          * When used with a device instantiated as platform_device, bcm_suspend
 761          * can be called at any time as long as the platform device is bound,
 762          * so it should use bcm_device_lock to protect access to hci_uart
 763          * and device_wake-up GPIO.
 764          */
 765         mutex_lock(&bcm_device_lock);
 766
 767         if (!bdev->hu)
 768                 goto unlock;
 769
 770         if (pm_runtime_active(dev))
 771                 bcm_suspend_device(dev);
 772
 773         if (device_may_wakeup(dev) && bdev->irq > 0) {
 774                 error = enable_irq_wake(bdev->irq);
 775                 if (!error)
 776                         bt_dev_dbg(bdev, "BCM irq: enabled");
 777         }
 778
 779 unlock:
 780         mutex_unlock(&bcm_device_lock);
 781
 782         return 0;
 783 }
 784
 785 /* resume callback */
 786 static int bcm_resume(struct device *dev)
 787 {
 788         struct bcm_device *bdev = dev_get_drvdata(dev);
 789         int err = 0;
 790
 791         bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
 792
 793         /*
 794          * When used with a device instantiated as platform_device, bcm_resume
 795          * can be called at any time as long as platform device is bound,
 796          * so it should use bcm_device_lock to protect access to hci_uart
 797          * and device_wake-up GPIO.
 798          */
 799         mutex_lock(&bcm_device_lock);
 800
 801         if (!bdev->hu)
 802                 goto unlock;
 803
 804         if (device_may_wakeup(dev) && bdev->irq > 0) {
 805                 disable_irq_wake(bdev->irq);
 806                 bt_dev_dbg(bdev, "BCM irq: disabled");
 807         }
 808
 809         err = bcm_resume_device(dev);
 810
 811 unlock:
 812         mutex_unlock(&bcm_device_lock);
 813
 814         if (!err) {
 815                 pm_runtime_disable(dev);
 816                 pm_runtime_set_active(dev);
 817                 pm_runtime_enable(dev);
 818         }
 819
 820         return 0;
 821 }
 822 #endif
 823
 824 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
 825 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
 826 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
 827
 828 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
 829         { "device-wakeup-gpios", &first_gpio, 1 },
 830         { "shutdown-gpios", &second_gpio, 1 },
 831         { "host-wakeup-gpios", &third_gpio, 1 },
 832         { },
 833 };
 834
 835 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
 836         { "host-wakeup-gpios", &first_gpio, 1 },
 837         { "device-wakeup-gpios", &second_gpio, 1 },
 838         { "shutdown-gpios", &third_gpio, 1 },
 839         { },
 840 };
 841
 842 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
 843 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
 844         {
 845                 .ident = "Meegopad T08",
 846                 .matches = {
 847                         DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
 848                                         "To be filled by OEM."),
 849                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
 850                         DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
 851                 },
 852         },
 853         { }
 854 };
 855
 856 #ifdef CONFIG_ACPI
 857 static int bcm_resource(struct acpi_resource *ares, void *data)
 858 {
 859         struct bcm_device *dev = data;
 860         struct acpi_resource_extended_irq *irq;
 861         struct acpi_resource_gpio *gpio;
 862         struct acpi_resource_uart_serialbus *sb;
 863
 864         switch (ares->type) {
 865         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 866                 irq = &ares->data.extended_irq;
 867                 if (irq->polarity != ACPI_ACTIVE_LOW)
 868                         dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
 869                 dev->irq_active_low = true;
 870                 break;
 871
 872         case ACPI_RESOURCE_TYPE_GPIO:
 873                 gpio = &ares->data.gpio;
 874                 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
 875                         dev->gpio_int_idx = dev->gpio_count;
 876                         dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
 877                 }
 878                 dev->gpio_count++;
 879                 break;
 880
 881         case ACPI_RESOURCE_TYPE_SERIAL_BUS:
 882                 sb = &ares->data.uart_serial_bus;
 883                 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
 884                         dev->init_speed = sb->default_baud_rate;
 885                         dev->oper_speed = 4000000;
 886                 }
 887                 break;
 888
 889         default:
 890                 break;
 891         }
 892
 893         return 0;
 894 }
 895
 896 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
 897 {
 898         if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
 899                 return -EIO;
 900
 901         return 0;
 902 }
 903
 904 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
 905 {
 906         if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
 907                                               NULL, NULL, NULL)))
 908                 return -EIO;
 909
 910         return 0;
 911 }
 912
 913 static int bcm_apple_get_resources(struct bcm_device *dev)
 914 {
 915         struct acpi_device *adev = ACPI_COMPANION(dev->dev);
 916         const union acpi_object *obj;
 917
 918         if (!adev ||
 919             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
 920             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
 921             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
 922                 return -ENODEV;
 923
 924         if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
 925             obj->buffer.length == 8)
 926                 dev->init_speed = *(u64 *)obj->buffer.pointer;
 927
 928         dev->set_device_wakeup = bcm_apple_set_device_wakeup;
 929         dev->set_shutdown = bcm_apple_set_shutdown;
 930
 931         return 0;
 932 }
 933 #else
 934 static inline int bcm_apple_get_resources(struct bcm_device *dev)
 935 {
 936         return -EOPNOTSUPP;
 937 }
 938 #endif /* CONFIG_ACPI */
 939
 940 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
 941 {
 942         gpiod_set_value_cansleep(dev->device_wakeup, awake);
 943         return 0;
 944 }
 945
 946 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
 947 {
 948         gpiod_set_value_cansleep(dev->shutdown, powered);
 949         return 0;
 950 }
 951
 952 /* Try a bunch of names for TXCO */
 953 static struct clk *bcm_get_txco(struct device *dev)
 954 {
 955         struct clk *clk;
 956
 957         /* New explicit name */
 958         clk = devm_clk_get(dev, "txco");
 959         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
 960                 return clk;
 961
 962         /* Deprecated name */
 963         clk = devm_clk_get(dev, "extclk");
 964         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
 965                 return clk;
 966
 967         /* Original code used no name at all */
 968         return devm_clk_get(dev, NULL);
 969 }
 970
 971 static int bcm_get_resources(struct bcm_device *dev)
 972 {
 973         const struct dmi_system_id *dmi_id;
 974         int err;
 975
 976         dev->name = dev_name(dev->dev);
 977
 978         if (x86_apple_machine && !bcm_apple_get_resources(dev))
 979                 return 0;
 980
 981         dev->txco_clk = bcm_get_txco(dev->dev);
 982
 983         /* Handle deferred probing */
 984         if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
 985                 return PTR_ERR(dev->txco_clk);
 986
 987         /* Ignore all other errors as before */
 988         if (IS_ERR(dev->txco_clk))
 989                 dev->txco_clk = NULL;
 990
 991         dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
 992         if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
 993                 return PTR_ERR(dev->lpo_clk);
 994
 995         if (IS_ERR(dev->lpo_clk))
 996                 dev->lpo_clk = NULL;
 997
 998         /* Check if we accidentally fetched the lpo clock twice */
 999         if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1000                 devm_clk_put(dev->dev, dev->txco_clk);
1001                 dev->txco_clk = NULL;
1002         }
1003
1004         dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1005                                                      GPIOD_OUT_LOW);
1006         if (IS_ERR(dev->device_wakeup))
1007                 return PTR_ERR(dev->device_wakeup);
1008
1009         dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1010                                                 GPIOD_OUT_LOW);
1011         if (IS_ERR(dev->shutdown))
1012                 return PTR_ERR(dev->shutdown);
1013
1014         dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1015         dev->set_shutdown = bcm_gpio_set_shutdown;
1016
1017         dev->supplies[0].supply = "vbat";
1018         dev->supplies[1].supply = "vddio";
1019         err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1020                                       dev->supplies);
1021         if (err)
1022                 return err;
1023
1024         /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1025         if (dev->irq <= 0) {
1026                 struct gpio_desc *gpio;
1027
1028                 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1029                                                GPIOD_IN);
1030                 if (IS_ERR(gpio))
1031                         return PTR_ERR(gpio);
1032
1033                 dev->irq = gpiod_to_irq(gpio);
1034         }
1035
1036         dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1037         if (dmi_id) {
1038                 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1039                          dmi_id->ident);
1040                 dev->irq = 0;
1041         }
1042
1043         dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1044         return 0;
1045 }
1046
1047 #ifdef CONFIG_ACPI
1048 static int bcm_acpi_probe(struct bcm_device *dev)
1049 {
1050         LIST_HEAD(resources);
1051         const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1052         struct resource_entry *entry;
1053         int ret;
1054
1055         /* Retrieve UART ACPI info */
1056         dev->gpio_int_idx = -1;
1057         ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1058                                      &resources, bcm_resource, dev);
1059         if (ret < 0)
1060                 return ret;
1061
1062         resource_list_for_each_entry(entry, &resources) {
1063                 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1064                         dev->irq = entry->res->start;
1065                         break;
1066                 }
1067         }
1068         acpi_dev_free_resource_list(&resources);
1069
1070         /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1071          * only 2 GPIO resources, we use the irq-last mapping for this, since
1072          * we already have an irq the 3th / last mapping will not be used.
1073          */
1074         if (dev->irq)
1075                 gpio_mapping = acpi_bcm_int_last_gpios;
1076         else if (dev->gpio_int_idx == 0)
1077                 gpio_mapping = acpi_bcm_int_first_gpios;
1078         else if (dev->gpio_int_idx == 2)
1079                 gpio_mapping = acpi_bcm_int_last_gpios;
1080         else
1081                 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1082                          dev->gpio_int_idx);
1083
1084         /* Warn if our expectations are not met. */
1085         if (dev->gpio_count != (dev->irq ? 2 : 3))
1086                 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1087                          dev->gpio_count);
1088
1089         ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1090         if (ret)
1091                 return ret;
1092
1093         if (irq_polarity != -1) {
1094                 dev->irq_active_low = irq_polarity;
1095                 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1096                          dev->irq_active_low ? "low" : "high");
1097         }
1098
1099         return 0;
1100 }
1101 #else
1102 static int bcm_acpi_probe(struct bcm_device *dev)
1103 {
1104         return -EINVAL;
1105 }
1106 #endif /* CONFIG_ACPI */
1107
1108 static int bcm_of_probe(struct bcm_device *bdev)
1109 {
1110         device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1111         return 0;
1112 }
1113
1114 static int bcm_probe(struct platform_device *pdev)
1115 {
1116         struct bcm_device *dev;
1117         int ret;
1118
1119         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1120         if (!dev)
1121                 return -ENOMEM;
1122
1123         dev->dev = &pdev->dev;
1124         dev->irq = platform_get_irq(pdev, 0);
1125
1126         if (has_acpi_companion(&pdev->dev)) {
1127                 ret = bcm_acpi_probe(dev);
1128                 if (ret)
1129                         return ret;
1130         }
1131
1132         ret = bcm_get_resources(dev);
1133         if (ret)
1134                 return ret;
1135
1136         platform_set_drvdata(pdev, dev);
1137
1138         dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1139
1140         /* Place this instance on the device list */
1141         mutex_lock(&bcm_device_lock);
1142         list_add_tail(&dev->list, &bcm_device_list);
1143         mutex_unlock(&bcm_device_lock);
1144
1145         ret = bcm_gpio_set_power(dev, false);
1146         if (ret)
1147                 dev_err(&pdev->dev, "Failed to power down\n");
1148
1149         return 0;
1150 }
1151
1152 static int bcm_remove(struct platform_device *pdev)
1153 {
1154         struct bcm_device *dev = platform_get_drvdata(pdev);
1155
1156         mutex_lock(&bcm_device_lock);
1157         list_del(&dev->list);
1158         mutex_unlock(&bcm_device_lock);
1159
1160         dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1161
1162         return 0;
1163 }
1164
1165 static const struct hci_uart_proto bcm_proto = {
1166         .id             = HCI_UART_BCM,
1167         .name           = "Broadcom",
1168         .manufacturer   = 15,
1169         .init_speed     = 115200,
1170         .open           = bcm_open,
1171         .close          = bcm_close,
1172         .flush          = bcm_flush,
1173         .setup          = bcm_setup,
1174         .set_baudrate   = bcm_set_baudrate,
1175         .recv           = bcm_recv,
1176         .enqueue        = bcm_enqueue,
1177         .dequeue        = bcm_dequeue,
1178 };
1179
1180 #ifdef CONFIG_ACPI
1181 static const struct acpi_device_id bcm_acpi_match[] = {
1182         { "BCM2E00" },
1183         { "BCM2E01" },
1184         { "BCM2E02" },
1185         { "BCM2E03" },
1186         { "BCM2E04" },
1187         { "BCM2E05" },
1188         { "BCM2E06" },
1189         { "BCM2E07" },
1190         { "BCM2E08" },
1191         { "BCM2E09" },
1192         { "BCM2E0A" },
1193         { "BCM2E0B" },
1194         { "BCM2E0C" },
1195         { "BCM2E0D" },
1196         { "BCM2E0E" },
1197         { "BCM2E0F" },
1198         { "BCM2E10" },
1199         { "BCM2E11" },
1200         { "BCM2E12" },
1201         { "BCM2E13" },
1202         { "BCM2E14" },
1203         { "BCM2E15" },
1204         { "BCM2E16" },
1205         { "BCM2E17" },
1206         { "BCM2E18" },
1207         { "BCM2E19" },
1208         { "BCM2E1A" },
1209         { "BCM2E1B" },
1210         { "BCM2E1C" },
1211         { "BCM2E1D" },
1212         { "BCM2E1F" },
1213         { "BCM2E20" },
1214         { "BCM2E21" },
1215         { "BCM2E22" },
1216         { "BCM2E23" },
1217         { "BCM2E24" },
1218         { "BCM2E25" },
1219         { "BCM2E26" },
1220         { "BCM2E27" },
1221         { "BCM2E28" },
1222         { "BCM2E29" },
1223         { "BCM2E2A" },
1224         { "BCM2E2B" },
1225         { "BCM2E2C" },
1226         { "BCM2E2D" },
1227         { "BCM2E2E" },
1228         { "BCM2E2F" },
1229         { "BCM2E30" },
1230         { "BCM2E31" },
1231         { "BCM2E32" },
1232         { "BCM2E33" },
1233         { "BCM2E34" },
1234         { "BCM2E35" },
1235         { "BCM2E36" },
1236         { "BCM2E37" },
1237         { "BCM2E38" },
1238         { "BCM2E39" },
1239         { "BCM2E3A" },
1240         { "BCM2E3B" },
1241         { "BCM2E3C" },
1242         { "BCM2E3D" },
1243         { "BCM2E3E" },
1244         { "BCM2E3F" },
1245         { "BCM2E40" },
1246         { "BCM2E41" },
1247         { "BCM2E42" },
1248         { "BCM2E43" },
1249         { "BCM2E44" },
1250         { "BCM2E45" },
1251         { "BCM2E46" },
1252         { "BCM2E47" },
1253         { "BCM2E48" },
1254         { "BCM2E49" },
1255         { "BCM2E4A" },
1256         { "BCM2E4B" },
1257         { "BCM2E4C" },
1258         { "BCM2E4D" },
1259         { "BCM2E4E" },
1260         { "BCM2E4F" },
1261         { "BCM2E50" },
1262         { "BCM2E51" },
1263         { "BCM2E52" },
1264         { "BCM2E53" },
1265         { "BCM2E54" },
1266         { "BCM2E55" },
1267         { "BCM2E56" },
1268         { "BCM2E57" },
1269         { "BCM2E58" },
1270         { "BCM2E59" },
1271         { "BCM2E5A" },
1272         { "BCM2E5B" },
1273         { "BCM2E5C" },
1274         { "BCM2E5D" },
1275         { "BCM2E5E" },
1276         { "BCM2E5F" },
1277         { "BCM2E60" },
1278         { "BCM2E61" },
1279         { "BCM2E62" },
1280         { "BCM2E63" },
1281         { "BCM2E64" },
1282         { "BCM2E65" },
1283         { "BCM2E66" },
1284         { "BCM2E67" },
1285         { "BCM2E68" },
1286         { "BCM2E69" },
1287         { "BCM2E6B" },
1288         { "BCM2E6D" },
1289         { "BCM2E6E" },
1290         { "BCM2E6F" },
1291         { "BCM2E70" },
1292         { "BCM2E71" },
1293         { "BCM2E72" },
1294         { "BCM2E73" },
1295         { "BCM2E74" },
1296         { "BCM2E75" },
1297         { "BCM2E76" },
1298         { "BCM2E77" },
1299         { "BCM2E78" },
1300         { "BCM2E79" },
1301         { "BCM2E7A" },
1302         { "BCM2E7B" },
1303         { "BCM2E7C" },
1304         { "BCM2E7D" },
1305         { "BCM2E7E" },
1306         { "BCM2E7F" },
1307         { "BCM2E80" },
1308         { "BCM2E81" },
1309         { "BCM2E82" },
1310         { "BCM2E83" },
1311         { "BCM2E84" },
1312         { "BCM2E85" },
1313         { "BCM2E86" },
1314         { "BCM2E87" },
1315         { "BCM2E88" },
1316         { "BCM2E89" },
1317         { "BCM2E8A" },
1318         { "BCM2E8B" },
1319         { "BCM2E8C" },
1320         { "BCM2E8D" },
1321         { "BCM2E8E" },
1322         { "BCM2E90" },
1323         { "BCM2E92" },
1324         { "BCM2E93" },
1325         { "BCM2E94" },
1326         { "BCM2E95" },
1327         { "BCM2E96" },
1328         { "BCM2E97" },
1329         { "BCM2E98" },
1330         { "BCM2E99" },
1331         { "BCM2E9A" },
1332         { "BCM2E9B" },
1333         { "BCM2E9C" },
1334         { "BCM2E9D" },
1335         { "BCM2EA0" },
1336         { "BCM2EA1" },
1337         { "BCM2EA2" },
1338         { "BCM2EA3" },
1339         { "BCM2EA4" },
1340         { "BCM2EA5" },
1341         { "BCM2EA6" },
1342         { "BCM2EA7" },
1343         { "BCM2EA8" },
1344         { "BCM2EA9" },
1345         { "BCM2EAA" },
1346         { "BCM2EAB" },
1347         { "BCM2EAC" },
1348         { },
1349 };
1350 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1351 #endif
1352
1353 /* suspend and resume callbacks */
1354 static const struct dev_pm_ops bcm_pm_ops = {
1355         SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1356         SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1357 };
1358
1359 static struct platform_driver bcm_driver = {
1360         .probe = bcm_probe,
1361         .remove = bcm_remove,
1362         .driver = {
1363                 .name = "hci_bcm",
1364                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1365                 .pm = &bcm_pm_ops,
1366         },
1367 };
1368
1369 static int bcm_serdev_probe(struct serdev_device *serdev)
1370 {
1371         struct bcm_device *bcmdev;
1372         int err;
1373
1374         bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1375         if (!bcmdev)
1376                 return -ENOMEM;
1377
1378         bcmdev->dev = &serdev->dev;
1379 #ifdef CONFIG_PM
1380         bcmdev->hu = &bcmdev->serdev_hu;
1381 #endif
1382         bcmdev->serdev_hu.serdev = serdev;
1383         serdev_device_set_drvdata(serdev, bcmdev);
1384
1385         if (has_acpi_companion(&serdev->dev))
1386                 err = bcm_acpi_probe(bcmdev);
1387         else
1388                 err = bcm_of_probe(bcmdev);
1389         if (err)
1390                 return err;
1391
1392         err = bcm_get_resources(bcmdev);
1393         if (err)
1394                 return err;
1395
1396         if (!bcmdev->shutdown) {
1397                 dev_warn(&serdev->dev,
1398                          "No reset resource, using default baud rate\n");
1399                 bcmdev->oper_speed = bcmdev->init_speed;
1400         }
1401
1402         err = bcm_gpio_set_power(bcmdev, false);
1403         if (err)
1404                 dev_err(&serdev->dev, "Failed to power down\n");
1405
1406         return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1407 }
1408
1409 static void bcm_serdev_remove(struct serdev_device *serdev)
1410 {
1411         struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1412
1413         hci_uart_unregister_device(&bcmdev->serdev_hu);
1414 }
1415
1416 #ifdef CONFIG_OF
1417 static const struct of_device_id bcm_bluetooth_of_match[] = {
1418         { .compatible = "brcm,bcm20702a1" },
1419         { .compatible = "brcm,bcm4330-bt" },
1420         { .compatible = "brcm,bcm43438-bt" },
1421         { },
1422 };
1423 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1424 #endif
1425
1426 static struct serdev_device_driver bcm_serdev_driver = {
1427         .probe = bcm_serdev_probe,
1428         .remove = bcm_serdev_remove,
1429         .driver = {
1430                 .name = "hci_uart_bcm",
1431                 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1432                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1433                 .pm = &bcm_pm_ops,
1434         },
1435 };
1436
1437 int __init bcm_init(void)
1438 {
1439         /* For now, we need to keep both platform device
1440          * driver (ACPI generated) and serdev driver (DT).
1441          */
1442         platform_driver_register(&bcm_driver);
1443         serdev_device_driver_register(&bcm_serdev_driver);
1444
1445         return hci_uart_register_proto(&bcm_proto);
1446 }
1447
1448 int __exit bcm_deinit(void)
1449 {
1450         platform_driver_unregister(&bcm_driver);
1451         serdev_device_driver_unregister(&bcm_serdev_driver);
1452
1453         return hci_uart_unregister_proto(&bcm_proto);
1454 }