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