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