drivers/bluetooth/hci_bcm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  *  Bluetooth HCI UART driver for Broadcom devices
   5  *
   6  *  Copyright (C) 2015  Intel Corporation
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/errno.h>
  11 #include <linux/skbuff.h>
  12 #include <linux/firmware.h>
  13 #include <linux/module.h>
  14 #include <linux/acpi.h>
  15 #include <linux/of.h>
  16 #include <linux/of_irq.h>
  17 #include <linux/property.h>
  18 #include <linux/platform_data/x86/apple.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/regulator/consumer.h>
  21 #include <linux/clk.h>
  22 #include <linux/gpio/consumer.h>
  23 #include <linux/tty.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/dmi.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/serdev.h>
  28
  29 #include <net/bluetooth/bluetooth.h>
  30 #include <net/bluetooth/hci_core.h>
  31
  32 #include "btbcm.h"
  33 #include "hci_uart.h"
  34
  35 #define BCM_NULL_PKT 0x00
  36 #define BCM_NULL_SIZE 0
  37
  38 #define BCM_LM_DIAG_PKT 0x07
  39 #define BCM_LM_DIAG_SIZE 63
  40
  41 #define BCM_TYPE49_PKT 0x31
  42 #define BCM_TYPE49_SIZE 0
  43
  44 #define BCM_TYPE52_PKT 0x34
  45 #define BCM_TYPE52_SIZE 0
  46
  47 #define BCM_AUTOSUSPEND_DELAY   5000 /* default autosleep delay */
  48
  49 #define BCM_NUM_SUPPLIES 2
  50
  51 /**
  52  * struct bcm_device_data - device specific data
  53  * @no_early_set_baudrate: Disallow set baudrate before driver setup()
  54  */
  55 struct bcm_device_data {
  56         bool    no_early_set_baudrate;
  57         bool    drive_rts_on_open;
  58 };
  59
  60 /**
  61  * struct bcm_device - device driver resources
  62  * @serdev_hu: HCI UART controller struct
  63  * @list: bcm_device_list node
  64  * @dev: physical UART slave
  65  * @name: device name logged by bt_dev_*() functions
  66  * @device_wakeup: BT_WAKE pin,
  67  *      assert = Bluetooth device must wake up or remain awake,
  68  *      deassert = Bluetooth device may sleep when sleep criteria are met
  69  * @shutdown: BT_REG_ON pin,
  70  *      power up or power down Bluetooth device internal regulators
  71  * @reset: BT_RST_N pin,
  72  *      active low resets the Bluetooth logic core
  73  * @set_device_wakeup: callback to toggle BT_WAKE pin
  74  *      either by accessing @device_wakeup or by calling @btlp
  75  * @set_shutdown: callback to toggle BT_REG_ON pin
  76  *      either by accessing @shutdown or by calling @btpu/@btpd
  77  * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
  78  * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
  79  * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
  80  * @txco_clk: external reference frequency clock used by Bluetooth device
  81  * @lpo_clk: external LPO clock used by Bluetooth device
  82  * @supplies: VBAT and VDDIO supplies used by Bluetooth device
  83  * @res_enabled: whether clocks and supplies are prepared and enabled
  84  * @init_speed: default baudrate of Bluetooth device;
  85  *      the host UART is initially set to this baudrate so that
  86  *      it can configure the Bluetooth device for @oper_speed
  87  * @oper_speed: preferred baudrate of Bluetooth device;
  88  *      set to 0 if @init_speed is already the preferred baudrate
  89  * @irq: interrupt triggered by HOST_WAKE_BT pin
  90  * @irq_active_low: whether @irq is active low
  91  * @hu: pointer to HCI UART controller struct,
  92  *      used to disable flow control during runtime suspend and system sleep
  93  * @is_suspended: whether flow control is currently disabled
  94  * @no_early_set_baudrate: don't set_baudrate before setup()
  95  */
  96 struct bcm_device {
  97         /* Must be the first member, hci_serdev.c expects this. */
  98         struct hci_uart         serdev_hu;
  99         struct list_head        list;
 100
 101         struct device           *dev;
 102
 103         const char              *name;
 104         struct gpio_desc        *device_wakeup;
 105         struct gpio_desc        *shutdown;
 106         struct gpio_desc        *reset;
 107         int                     (*set_device_wakeup)(struct bcm_device *, bool);
 108         int                     (*set_shutdown)(struct bcm_device *, bool);
 109 #ifdef CONFIG_ACPI
 110         acpi_handle             btlp, btpu, btpd;
 111         int                     gpio_count;
 112         int                     gpio_int_idx;
 113 #endif
 114
 115         struct clk              *txco_clk;
 116         struct clk              *lpo_clk;
 117         struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
 118         bool                    res_enabled;
 119
 120         u32                     init_speed;
 121         u32                     oper_speed;
 122         int                     irq;
 123         bool                    irq_active_low;
 124         bool                    irq_acquired;
 125
 126 #ifdef CONFIG_PM
 127         struct hci_uart         *hu;
 128         bool                    is_suspended;
 129 #endif
 130         bool                    no_early_set_baudrate;
 131         bool                    drive_rts_on_open;
 132         u8                      pcm_int_params[5];
 133 };
 134
 135 /* generic bcm uart resources */
 136 struct bcm_data {
 137         struct sk_buff          *rx_skb;
 138         struct sk_buff_head     txq;
 139
 140         struct bcm_device       *dev;
 141 };
 142
 143 /* List of BCM BT UART devices */
 144 static DEFINE_MUTEX(bcm_device_lock);
 145 static LIST_HEAD(bcm_device_list);
 146
 147 static int irq_polarity = -1;
 148 module_param(irq_polarity, int, 0444);
 149 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
 150
 151 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
 152 {
 153         if (hu->serdev)
 154                 serdev_device_set_baudrate(hu->serdev, speed);
 155         else
 156                 hci_uart_set_baudrate(hu, speed);
 157 }
 158
 159 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
 160 {
 161         struct hci_dev *hdev = hu->hdev;
 162         struct sk_buff *skb;
 163         struct bcm_update_uart_baud_rate param;
 164
 165         if (speed > 3000000) {
 166                 struct bcm_write_uart_clock_setting clock;
 167
 168                 clock.type = BCM_UART_CLOCK_48MHZ;
 169
 170                 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
 171
 172                 /* This Broadcom specific command changes the UART's controller
 173                  * clock for baud rate > 3000000.
 174                  */
 175                 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
 176                 if (IS_ERR(skb)) {
 177                         int err = PTR_ERR(skb);
 178                         bt_dev_err(hdev, "BCM: failed to write clock (%d)",
 179                                    err);
 180                         return err;
 181                 }
 182
 183                 kfree_skb(skb);
 184         }
 185
 186         bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
 187
 188         param.zero = cpu_to_le16(0);
 189         param.baud_rate = cpu_to_le32(speed);
 190
 191         /* This Broadcom specific command changes the UART's controller baud
 192          * rate.
 193          */
 194         skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
 195                              HCI_INIT_TIMEOUT);
 196         if (IS_ERR(skb)) {
 197                 int err = PTR_ERR(skb);
 198                 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
 199                            err);
 200                 return err;
 201         }
 202
 203         kfree_skb(skb);
 204
 205         return 0;
 206 }
 207
 208 /* bcm_device_exists should be protected by bcm_device_lock */
 209 static bool bcm_device_exists(struct bcm_device *device)
 210 {
 211         struct list_head *p;
 212
 213 #ifdef CONFIG_PM
 214         /* Devices using serdev always exist */
 215         if (device && device->hu && device->hu->serdev)
 216                 return true;
 217 #endif
 218
 219         list_for_each(p, &bcm_device_list) {
 220                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 221
 222                 if (device == dev)
 223                         return true;
 224         }
 225
 226         return false;
 227 }
 228
 229 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 230 {
 231         int err;
 232
 233         if (powered && !dev->res_enabled) {
 234                 /* Intel Macs use bcm_apple_get_resources() and don't
 235                  * have regulator supplies configured.
 236                  */
 237                 if (dev->supplies[0].supply) {
 238                         err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
 239                                                     dev->supplies);
 240                         if (err)
 241                                 return err;
 242                 }
 243
 244                 /* LPO clock needs to be 32.768 kHz */
 245                 err = clk_set_rate(dev->lpo_clk, 32768);
 246                 if (err) {
 247                         dev_err(dev->dev, "Could not set LPO clock rate\n");
 248                         goto err_regulator_disable;
 249                 }
 250
 251                 err = clk_prepare_enable(dev->lpo_clk);
 252                 if (err)
 253                         goto err_regulator_disable;
 254
 255                 err = clk_prepare_enable(dev->txco_clk);
 256                 if (err)
 257                         goto err_lpo_clk_disable;
 258         }
 259
 260         err = dev->set_shutdown(dev, powered);
 261         if (err)
 262                 goto err_txco_clk_disable;
 263
 264         err = dev->set_device_wakeup(dev, powered);
 265         if (err)
 266                 goto err_revert_shutdown;
 267
 268         if (!powered && dev->res_enabled) {
 269                 clk_disable_unprepare(dev->txco_clk);
 270                 clk_disable_unprepare(dev->lpo_clk);
 271
 272                 /* Intel Macs use bcm_apple_get_resources() and don't
 273                  * have regulator supplies configured.
 274                  */
 275                 if (dev->supplies[0].supply)
 276                         regulator_bulk_disable(BCM_NUM_SUPPLIES,
 277                                                dev->supplies);
 278         }
 279
 280         /* wait for device to power on and come out of reset */
 281         usleep_range(100000, 120000);
 282
 283         dev->res_enabled = powered;
 284
 285         return 0;
 286
 287 err_revert_shutdown:
 288         dev->set_shutdown(dev, !powered);
 289 err_txco_clk_disable:
 290         if (powered && !dev->res_enabled)
 291                 clk_disable_unprepare(dev->txco_clk);
 292 err_lpo_clk_disable:
 293         if (powered && !dev->res_enabled)
 294                 clk_disable_unprepare(dev->lpo_clk);
 295 err_regulator_disable:
 296         if (powered && !dev->res_enabled)
 297                 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
 298         return err;
 299 }
 300
 301 #ifdef CONFIG_PM
 302 static irqreturn_t bcm_host_wake(int irq, void *data)
 303 {
 304         struct bcm_device *bdev = data;
 305
 306         bt_dev_dbg(bdev, "Host wake IRQ");
 307
 308         pm_runtime_get(bdev->dev);
 309         pm_runtime_mark_last_busy(bdev->dev);
 310         pm_runtime_put_autosuspend(bdev->dev);
 311
 312         return IRQ_HANDLED;
 313 }
 314
 315 static int bcm_request_irq(struct bcm_data *bcm)
 316 {
 317         struct bcm_device *bdev = bcm->dev;
 318         int err;
 319
 320         mutex_lock(&bcm_device_lock);
 321         if (!bcm_device_exists(bdev)) {
 322                 err = -ENODEV;
 323                 goto unlock;
 324         }
 325
 326         if (bdev->irq <= 0) {
 327                 err = -EOPNOTSUPP;
 328                 goto unlock;
 329         }
 330
 331         err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
 332                                bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
 333                                                       IRQF_TRIGGER_RISING,
 334                                "host_wake", bdev);
 335         if (err) {
 336                 bdev->irq = err;
 337                 goto unlock;
 338         }
 339
 340         bdev->irq_acquired = true;
 341
 342         device_init_wakeup(bdev->dev, true);
 343
 344         pm_runtime_set_autosuspend_delay(bdev->dev,
 345                                          BCM_AUTOSUSPEND_DELAY);
 346         pm_runtime_use_autosuspend(bdev->dev);
 347         pm_runtime_set_active(bdev->dev);
 348         pm_runtime_enable(bdev->dev);
 349
 350 unlock:
 351         mutex_unlock(&bcm_device_lock);
 352
 353         return err;
 354 }
 355
 356 static const struct bcm_set_sleep_mode default_sleep_params = {
 357         .sleep_mode = 1,        /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
 358         .idle_host = 2,         /* idle threshold HOST, in 300ms */
 359         .idle_dev = 2,          /* idle threshold device, in 300ms */
 360         .bt_wake_active = 1,    /* BT_WAKE active mode: 1 = high, 0 = low */
 361         .host_wake_active = 0,  /* HOST_WAKE active mode: 1 = high, 0 = low */
 362         .allow_host_sleep = 1,  /* Allow host sleep in SCO flag */
 363         .combine_modes = 1,     /* Combine sleep and LPM flag */
 364         .tristate_control = 0,  /* Allow tri-state control of UART tx flag */
 365         /* Irrelevant USB flags */
 366         .usb_auto_sleep = 0,
 367         .usb_resume_timeout = 0,
 368         .break_to_host = 0,
 369         .pulsed_host_wake = 1,
 370 };
 371
 372 static int bcm_setup_sleep(struct hci_uart *hu)
 373 {
 374         struct bcm_data *bcm = hu->priv;
 375         struct sk_buff *skb;
 376         struct bcm_set_sleep_mode sleep_params = default_sleep_params;
 377
 378         sleep_params.host_wake_active = !bcm->dev->irq_active_low;
 379
 380         skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
 381                              &sleep_params, HCI_INIT_TIMEOUT);
 382         if (IS_ERR(skb)) {
 383                 int err = PTR_ERR(skb);
 384                 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
 385                 return err;
 386         }
 387         kfree_skb(skb);
 388
 389         bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
 390
 391         return 0;
 392 }
 393 #else
 394 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
 395 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
 396 #endif
 397
 398 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
 399 {
 400         struct hci_uart *hu = hci_get_drvdata(hdev);
 401         struct bcm_data *bcm = hu->priv;
 402         struct sk_buff *skb;
 403
 404         if (!test_bit(HCI_RUNNING, &hdev->flags))
 405                 return -ENETDOWN;
 406
 407         skb = bt_skb_alloc(3, GFP_KERNEL);
 408         if (!skb)
 409                 return -ENOMEM;
 410
 411         skb_put_u8(skb, BCM_LM_DIAG_PKT);
 412         skb_put_u8(skb, 0xf0);
 413         skb_put_u8(skb, enable);
 414
 415         skb_queue_tail(&bcm->txq, skb);
 416         hci_uart_tx_wakeup(hu);
 417
 418         return 0;
 419 }
 420
 421 static int bcm_open(struct hci_uart *hu)
 422 {
 423         struct bcm_data *bcm;
 424         struct list_head *p;
 425         int err;
 426
 427         bt_dev_dbg(hu->hdev, "hu %p", hu);
 428
 429         if (!hci_uart_has_flow_control(hu))
 430                 return -EOPNOTSUPP;
 431
 432         bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
 433         if (!bcm)
 434                 return -ENOMEM;
 435
 436         skb_queue_head_init(&bcm->txq);
 437
 438         hu->priv = bcm;
 439
 440         mutex_lock(&bcm_device_lock);
 441
 442         if (hu->serdev) {
 443                 bcm->dev = serdev_device_get_drvdata(hu->serdev);
 444                 goto out;
 445         }
 446
 447         if (!hu->tty->dev)
 448                 goto out;
 449
 450         list_for_each(p, &bcm_device_list) {
 451                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 452
 453                 /* Retrieve saved bcm_device based on parent of the
 454                  * platform device (saved during device probe) and
 455                  * parent of tty device used by hci_uart
 456                  */
 457                 if (hu->tty->dev->parent == dev->dev->parent) {
 458                         bcm->dev = dev;
 459 #ifdef CONFIG_PM
 460                         dev->hu = hu;
 461 #endif
 462                         break;
 463                 }
 464         }
 465
 466 out:
 467         if (bcm->dev) {
 468                 if (bcm->dev->drive_rts_on_open)
 469                         hci_uart_set_flow_control(hu, true);
 470
 471                 hu->init_speed = bcm->dev->init_speed;
 472
 473                 /* If oper_speed is set, ldisc/serdev will set the baudrate
 474                  * before calling setup()
 475                  */
 476                 if (!bcm->dev->no_early_set_baudrate)
 477                         hu->oper_speed = bcm->dev->oper_speed;
 478
 479                 err = bcm_gpio_set_power(bcm->dev, true);
 480
 481                 if (bcm->dev->drive_rts_on_open)
 482                         hci_uart_set_flow_control(hu, false);
 483
 484                 if (err)
 485                         goto err_unset_hu;
 486         }
 487
 488         mutex_unlock(&bcm_device_lock);
 489         return 0;
 490
 491 err_unset_hu:
 492 #ifdef CONFIG_PM
 493         if (!hu->serdev)
 494                 bcm->dev->hu = NULL;
 495 #endif
 496         mutex_unlock(&bcm_device_lock);
 497         hu->priv = NULL;
 498         kfree(bcm);
 499         return err;
 500 }
 501
 502 static int bcm_close(struct hci_uart *hu)
 503 {
 504         struct bcm_data *bcm = hu->priv;
 505         struct bcm_device *bdev = NULL;
 506         int err;
 507
 508         bt_dev_dbg(hu->hdev, "hu %p", hu);
 509
 510         /* Protect bcm->dev against removal of the device or driver */
 511         mutex_lock(&bcm_device_lock);
 512
 513         if (hu->serdev) {
 514                 bdev = serdev_device_get_drvdata(hu->serdev);
 515         } else if (bcm_device_exists(bcm->dev)) {
 516                 bdev = bcm->dev;
 517 #ifdef CONFIG_PM
 518                 bdev->hu = NULL;
 519 #endif
 520         }
 521
 522         if (bdev) {
 523                 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) {
 524                         devm_free_irq(bdev->dev, bdev->irq, bdev);
 525                         device_init_wakeup(bdev->dev, false);
 526                         pm_runtime_disable(bdev->dev);
 527                 }
 528
 529                 err = bcm_gpio_set_power(bdev, false);
 530                 if (err)
 531                         bt_dev_err(hu->hdev, "Failed to power down");
 532                 else
 533                         pm_runtime_set_suspended(bdev->dev);
 534         }
 535         mutex_unlock(&bcm_device_lock);
 536
 537         skb_queue_purge(&bcm->txq);
 538         kfree_skb(bcm->rx_skb);
 539         kfree(bcm);
 540
 541         hu->priv = NULL;
 542         return 0;
 543 }
 544
 545 static int bcm_flush(struct hci_uart *hu)
 546 {
 547         struct bcm_data *bcm = hu->priv;
 548
 549         bt_dev_dbg(hu->hdev, "hu %p", hu);
 550
 551         skb_queue_purge(&bcm->txq);
 552
 553         return 0;
 554 }
 555
 556 static int bcm_setup(struct hci_uart *hu)
 557 {
 558         struct bcm_data *bcm = hu->priv;
 559         bool fw_load_done = false;
 560         unsigned int speed;
 561         int err;
 562
 563         bt_dev_dbg(hu->hdev, "hu %p", hu);
 564
 565         hu->hdev->set_diag = bcm_set_diag;
 566         hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 567
 568         err = btbcm_initialize(hu->hdev, &fw_load_done);
 569         if (err)
 570                 return err;
 571
 572         if (!fw_load_done)
 573                 return 0;
 574
 575         /* Init speed if any */
 576         if (hu->init_speed)
 577                 speed = hu->init_speed;
 578         else if (hu->proto->init_speed)
 579                 speed = hu->proto->init_speed;
 580         else
 581                 speed = 0;
 582
 583         if (speed)
 584                 host_set_baudrate(hu, speed);
 585
 586         /* Operational speed if any */
 587         if (hu->oper_speed)
 588                 speed = hu->oper_speed;
 589         else if (bcm->dev && bcm->dev->oper_speed)
 590                 speed = bcm->dev->oper_speed;
 591         else if (hu->proto->oper_speed)
 592                 speed = hu->proto->oper_speed;
 593         else
 594                 speed = 0;
 595
 596         if (speed) {
 597                 err = bcm_set_baudrate(hu, speed);
 598                 if (!err)
 599                         host_set_baudrate(hu, speed);
 600         }
 601
 602         /* PCM parameters if provided */
 603         if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
 604                 struct bcm_set_pcm_int_params params;
 605
 606                 btbcm_read_pcm_int_params(hu->hdev, &params);
 607
 608                 memcpy(&params, bcm->dev->pcm_int_params, 5);
 609                 btbcm_write_pcm_int_params(hu->hdev, &params);
 610         }
 611
 612         err = btbcm_finalize(hu->hdev, &fw_load_done);
 613         if (err)
 614                 return err;
 615
 616         /* Some devices ship with the controller default address.
 617          * Allow the bootloader to set a valid address through the
 618          * device tree.
 619          */
 620         set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks);
 621
 622         if (!bcm_request_irq(bcm))
 623                 err = bcm_setup_sleep(hu);
 624
 625         return err;
 626 }
 627
 628 #define BCM_RECV_LM_DIAG \
 629         .type = BCM_LM_DIAG_PKT, \
 630         .hlen = BCM_LM_DIAG_SIZE, \
 631         .loff = 0, \
 632         .lsize = 0, \
 633         .maxlen = BCM_LM_DIAG_SIZE
 634
 635 #define BCM_RECV_NULL \
 636         .type = BCM_NULL_PKT, \
 637         .hlen = BCM_NULL_SIZE, \
 638         .loff = 0, \
 639         .lsize = 0, \
 640         .maxlen = BCM_NULL_SIZE
 641
 642 #define BCM_RECV_TYPE49 \
 643         .type = BCM_TYPE49_PKT, \
 644         .hlen = BCM_TYPE49_SIZE, \
 645         .loff = 0, \
 646         .lsize = 0, \
 647         .maxlen = BCM_TYPE49_SIZE
 648
 649 #define BCM_RECV_TYPE52 \
 650         .type = BCM_TYPE52_PKT, \
 651         .hlen = BCM_TYPE52_SIZE, \
 652         .loff = 0, \
 653         .lsize = 0, \
 654         .maxlen = BCM_TYPE52_SIZE
 655
 656 static const struct h4_recv_pkt bcm_recv_pkts[] = {
 657         { H4_RECV_ACL,      .recv = hci_recv_frame },
 658         { H4_RECV_SCO,      .recv = hci_recv_frame },
 659         { H4_RECV_EVENT,    .recv = hci_recv_frame },
 660         { H4_RECV_ISO,      .recv = hci_recv_frame },
 661         { BCM_RECV_LM_DIAG, .recv = hci_recv_diag  },
 662         { BCM_RECV_NULL,    .recv = hci_recv_diag  },
 663         { BCM_RECV_TYPE49,  .recv = hci_recv_diag  },
 664         { BCM_RECV_TYPE52,  .recv = hci_recv_diag  },
 665 };
 666
 667 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 668 {
 669         struct bcm_data *bcm = hu->priv;
 670
 671         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 672                 return -EUNATCH;
 673
 674         bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
 675                                   bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
 676         if (IS_ERR(bcm->rx_skb)) {
 677                 int err = PTR_ERR(bcm->rx_skb);
 678                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
 679                 bcm->rx_skb = NULL;
 680                 return err;
 681         } else if (!bcm->rx_skb) {
 682                 /* Delay auto-suspend when receiving completed packet */
 683                 mutex_lock(&bcm_device_lock);
 684                 if (bcm->dev && bcm_device_exists(bcm->dev)) {
 685                         pm_runtime_get(bcm->dev->dev);
 686                         pm_runtime_mark_last_busy(bcm->dev->dev);
 687                         pm_runtime_put_autosuspend(bcm->dev->dev);
 688                 }
 689                 mutex_unlock(&bcm_device_lock);
 690         }
 691
 692         return count;
 693 }
 694
 695 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 696 {
 697         struct bcm_data *bcm = hu->priv;
 698
 699         bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
 700
 701         /* Prepend skb with frame type */
 702         memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 703         skb_queue_tail(&bcm->txq, skb);
 704
 705         return 0;
 706 }
 707
 708 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
 709 {
 710         struct bcm_data *bcm = hu->priv;
 711         struct sk_buff *skb = NULL;
 712         struct bcm_device *bdev = NULL;
 713
 714         mutex_lock(&bcm_device_lock);
 715
 716         if (bcm_device_exists(bcm->dev)) {
 717                 bdev = bcm->dev;
 718                 pm_runtime_get_sync(bdev->dev);
 719                 /* Shall be resumed here */
 720         }
 721
 722         skb = skb_dequeue(&bcm->txq);
 723
 724         if (bdev) {
 725                 pm_runtime_mark_last_busy(bdev->dev);
 726                 pm_runtime_put_autosuspend(bdev->dev);
 727         }
 728
 729         mutex_unlock(&bcm_device_lock);
 730
 731         return skb;
 732 }
 733
 734 #ifdef CONFIG_PM
 735 static int bcm_suspend_device(struct device *dev)
 736 {
 737         struct bcm_device *bdev = dev_get_drvdata(dev);
 738         int err;
 739
 740         bt_dev_dbg(bdev, "");
 741
 742         if (!bdev->is_suspended && bdev->hu) {
 743                 hci_uart_set_flow_control(bdev->hu, true);
 744
 745                 /* Once this returns, driver suspends BT via GPIO */
 746                 bdev->is_suspended = true;
 747         }
 748
 749         /* Suspend the device */
 750         err = bdev->set_device_wakeup(bdev, false);
 751         if (err) {
 752                 if (bdev->is_suspended && bdev->hu) {
 753                         bdev->is_suspended = false;
 754                         hci_uart_set_flow_control(bdev->hu, false);
 755                 }
 756                 return -EBUSY;
 757         }
 758
 759         bt_dev_dbg(bdev, "suspend, delaying 15 ms");
 760         msleep(15);
 761
 762         return 0;
 763 }
 764
 765 static int bcm_resume_device(struct device *dev)
 766 {
 767         struct bcm_device *bdev = dev_get_drvdata(dev);
 768         int err;
 769
 770         bt_dev_dbg(bdev, "");
 771
 772         err = bdev->set_device_wakeup(bdev, true);
 773         if (err) {
 774                 dev_err(dev, "Failed to power up\n");
 775                 return err;
 776         }
 777
 778         bt_dev_dbg(bdev, "resume, delaying 15 ms");
 779         msleep(15);
 780
 781         /* When this executes, the device has woken up already */
 782         if (bdev->is_suspended && bdev->hu) {
 783                 bdev->is_suspended = false;
 784
 785                 hci_uart_set_flow_control(bdev->hu, false);
 786         }
 787
 788         return 0;
 789 }
 790 #endif
 791
 792 #ifdef CONFIG_PM_SLEEP
 793 /* suspend callback */
 794 static int bcm_suspend(struct device *dev)
 795 {
 796         struct bcm_device *bdev = dev_get_drvdata(dev);
 797         int error;
 798
 799         bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
 800
 801         /*
 802          * When used with a device instantiated as platform_device, bcm_suspend
 803          * can be called at any time as long as the platform device is bound,
 804          * so it should use bcm_device_lock to protect access to hci_uart
 805          * and device_wake-up GPIO.
 806          */
 807         mutex_lock(&bcm_device_lock);
 808
 809         if (!bdev->hu)
 810                 goto unlock;
 811
 812         if (pm_runtime_active(dev))
 813                 bcm_suspend_device(dev);
 814
 815         if (device_may_wakeup(dev) && bdev->irq > 0) {
 816                 error = enable_irq_wake(bdev->irq);
 817                 if (!error)
 818                         bt_dev_dbg(bdev, "BCM irq: enabled");
 819         }
 820
 821 unlock:
 822         mutex_unlock(&bcm_device_lock);
 823
 824         return 0;
 825 }
 826
 827 /* resume callback */
 828 static int bcm_resume(struct device *dev)
 829 {
 830         struct bcm_device *bdev = dev_get_drvdata(dev);
 831         int err = 0;
 832
 833         bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
 834
 835         /*
 836          * When used with a device instantiated as platform_device, bcm_resume
 837          * can be called at any time as long as platform device is bound,
 838          * so it should use bcm_device_lock to protect access to hci_uart
 839          * and device_wake-up GPIO.
 840          */
 841         mutex_lock(&bcm_device_lock);
 842
 843         if (!bdev->hu)
 844                 goto unlock;
 845
 846         if (device_may_wakeup(dev) && bdev->irq > 0) {
 847                 disable_irq_wake(bdev->irq);
 848                 bt_dev_dbg(bdev, "BCM irq: disabled");
 849         }
 850
 851         err = bcm_resume_device(dev);
 852
 853 unlock:
 854         mutex_unlock(&bcm_device_lock);
 855
 856         if (!err) {
 857                 pm_runtime_disable(dev);
 858                 pm_runtime_set_active(dev);
 859                 pm_runtime_enable(dev);
 860         }
 861
 862         return 0;
 863 }
 864 #endif
 865
 866 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
 867 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
 868         {
 869                 .ident = "Meegopad T08",
 870                 .matches = {
 871                         DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
 872                                         "To be filled by OEM."),
 873                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
 874                         DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
 875                 },
 876         },
 877         { }
 878 };
 879
 880 #ifdef CONFIG_ACPI
 881 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
 882 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
 883 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
 884
 885 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
 886         { "device-wakeup-gpios", &first_gpio, 1 },
 887         { "shutdown-gpios", &second_gpio, 1 },
 888         { "host-wakeup-gpios", &third_gpio, 1 },
 889         { },
 890 };
 891
 892 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
 893         { "host-wakeup-gpios", &first_gpio, 1 },
 894         { "device-wakeup-gpios", &second_gpio, 1 },
 895         { "shutdown-gpios", &third_gpio, 1 },
 896         { },
 897 };
 898
 899 static int bcm_resource(struct acpi_resource *ares, void *data)
 900 {
 901         struct bcm_device *dev = data;
 902         struct acpi_resource_extended_irq *irq;
 903         struct acpi_resource_gpio *gpio;
 904         struct acpi_resource_uart_serialbus *sb;
 905
 906         switch (ares->type) {
 907         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 908                 irq = &ares->data.extended_irq;
 909                 if (irq->polarity != ACPI_ACTIVE_LOW)
 910                         dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
 911                 dev->irq_active_low = true;
 912                 break;
 913
 914         case ACPI_RESOURCE_TYPE_GPIO:
 915                 gpio = &ares->data.gpio;
 916                 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
 917                         dev->gpio_int_idx = dev->gpio_count;
 918                         dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
 919                 }
 920                 dev->gpio_count++;
 921                 break;
 922
 923         case ACPI_RESOURCE_TYPE_SERIAL_BUS:
 924                 sb = &ares->data.uart_serial_bus;
 925                 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
 926                         dev->init_speed = sb->default_baud_rate;
 927                         dev->oper_speed = 4000000;
 928                 }
 929                 break;
 930
 931         default:
 932                 break;
 933         }
 934
 935         return 0;
 936 }
 937
 938 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
 939 {
 940         if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
 941                 return -EIO;
 942
 943         return 0;
 944 }
 945
 946 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
 947 {
 948         if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
 949                                               NULL, NULL, NULL)))
 950                 return -EIO;
 951
 952         return 0;
 953 }
 954
 955 static int bcm_apple_get_resources(struct bcm_device *dev)
 956 {
 957         struct acpi_device *adev = ACPI_COMPANION(dev->dev);
 958         const union acpi_object *obj;
 959
 960         if (!adev ||
 961             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
 962             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
 963             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
 964                 return -ENODEV;
 965
 966         if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
 967             obj->buffer.length == 8)
 968                 dev->init_speed = *(u64 *)obj->buffer.pointer;
 969
 970         dev->set_device_wakeup = bcm_apple_set_device_wakeup;
 971         dev->set_shutdown = bcm_apple_set_shutdown;
 972
 973         return 0;
 974 }
 975 #else
 976 static inline int bcm_apple_get_resources(struct bcm_device *dev)
 977 {
 978         return -EOPNOTSUPP;
 979 }
 980 #endif /* CONFIG_ACPI */
 981
 982 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
 983 {
 984         gpiod_set_value_cansleep(dev->device_wakeup, awake);
 985         return 0;
 986 }
 987
 988 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
 989 {
 990         gpiod_set_value_cansleep(dev->shutdown, powered);
 991         if (dev->reset)
 992                 /*
 993                  * The reset line is asserted on powerdown and deasserted
 994                  * on poweron so the inverse of powered is used. Notice
 995                  * that the GPIO line BT_RST_N needs to be specified as
 996                  * active low in the device tree or similar system
 997                  * description.
 998                  */
 999                 gpiod_set_value_cansleep(dev->reset, !powered);
1000         return 0;
1001 }
1002
1003 /* Try a bunch of names for TXCO */
1004 static struct clk *bcm_get_txco(struct device *dev)
1005 {
1006         struct clk *clk;
1007
1008         /* New explicit name */
1009         clk = devm_clk_get(dev, "txco");
1010         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1011                 return clk;
1012
1013         /* Deprecated name */
1014         clk = devm_clk_get(dev, "extclk");
1015         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1016                 return clk;
1017
1018         /* Original code used no name at all */
1019         return devm_clk_get(dev, NULL);
1020 }
1021
1022 static int bcm_get_resources(struct bcm_device *dev)
1023 {
1024         const struct dmi_system_id *dmi_id;
1025         int err;
1026
1027         dev->name = dev_name(dev->dev);
1028
1029         if (x86_apple_machine && !bcm_apple_get_resources(dev))
1030                 return 0;
1031
1032         dev->txco_clk = bcm_get_txco(dev->dev);
1033
1034         /* Handle deferred probing */
1035         if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1036                 return PTR_ERR(dev->txco_clk);
1037
1038         /* Ignore all other errors as before */
1039         if (IS_ERR(dev->txco_clk))
1040                 dev->txco_clk = NULL;
1041
1042         dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1043         if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1044                 return PTR_ERR(dev->lpo_clk);
1045
1046         if (IS_ERR(dev->lpo_clk))
1047                 dev->lpo_clk = NULL;
1048
1049         /* Check if we accidentally fetched the lpo clock twice */
1050         if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1051                 devm_clk_put(dev->dev, dev->txco_clk);
1052                 dev->txco_clk = NULL;
1053         }
1054
1055         dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1056                                                      GPIOD_OUT_LOW);
1057         if (IS_ERR(dev->device_wakeup))
1058                 return PTR_ERR(dev->device_wakeup);
1059
1060         dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1061                                                 GPIOD_OUT_LOW);
1062         if (IS_ERR(dev->shutdown))
1063                 return PTR_ERR(dev->shutdown);
1064
1065         dev->reset = devm_gpiod_get_optional(dev->dev, "reset",
1066                                              GPIOD_OUT_LOW);
1067         if (IS_ERR(dev->reset))
1068                 return PTR_ERR(dev->reset);
1069
1070         dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1071         dev->set_shutdown = bcm_gpio_set_shutdown;
1072
1073         dev->supplies[0].supply = "vbat";
1074         dev->supplies[1].supply = "vddio";
1075         err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1076                                       dev->supplies);
1077         if (err)
1078                 return err;
1079
1080         /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1081         if (dev->irq <= 0) {
1082                 struct gpio_desc *gpio;
1083
1084                 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1085                                                GPIOD_IN);
1086                 if (IS_ERR(gpio))
1087                         return PTR_ERR(gpio);
1088
1089                 dev->irq = gpiod_to_irq(gpio);
1090         }
1091
1092         dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1093         if (dmi_id) {
1094                 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1095                          dmi_id->ident);
1096                 dev->irq = 0;
1097         }
1098
1099         dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1100         return 0;
1101 }
1102
1103 #ifdef CONFIG_ACPI
1104 static int bcm_acpi_probe(struct bcm_device *dev)
1105 {
1106         LIST_HEAD(resources);
1107         const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1108         struct resource_entry *entry;
1109         int ret;
1110
1111         /* Retrieve UART ACPI info */
1112         dev->gpio_int_idx = -1;
1113         ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1114                                      &resources, bcm_resource, dev);
1115         if (ret < 0)
1116                 return ret;
1117
1118         resource_list_for_each_entry(entry, &resources) {
1119                 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1120                         dev->irq = entry->res->start;
1121                         break;
1122                 }
1123         }
1124         acpi_dev_free_resource_list(&resources);
1125
1126         /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1127          * only 2 GPIO resources, we use the irq-last mapping for this, since
1128          * we already have an irq the 3th / last mapping will not be used.
1129          */
1130         if (dev->irq)
1131                 gpio_mapping = acpi_bcm_int_last_gpios;
1132         else if (dev->gpio_int_idx == 0)
1133                 gpio_mapping = acpi_bcm_int_first_gpios;
1134         else if (dev->gpio_int_idx == 2)
1135                 gpio_mapping = acpi_bcm_int_last_gpios;
1136         else
1137                 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1138                          dev->gpio_int_idx);
1139
1140         /* Warn if our expectations are not met. */
1141         if (dev->gpio_count != (dev->irq ? 2 : 3))
1142                 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1143                          dev->gpio_count);
1144
1145         ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1146         if (ret)
1147                 return ret;
1148
1149         if (irq_polarity != -1) {
1150                 dev->irq_active_low = irq_polarity;
1151                 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1152                          dev->irq_active_low ? "low" : "high");
1153         }
1154
1155         return 0;
1156 }
1157 #else
1158 static int bcm_acpi_probe(struct bcm_device *dev)
1159 {
1160         return -EINVAL;
1161 }
1162 #endif /* CONFIG_ACPI */
1163
1164 static int bcm_of_probe(struct bcm_device *bdev)
1165 {
1166         device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1167         device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
1168                                       bdev->pcm_int_params, 5);
1169         bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup");
1170         bdev->irq_active_low = irq_get_trigger_type(bdev->irq)
1171                              & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW);
1172         return 0;
1173 }
1174
1175 static int bcm_probe(struct platform_device *pdev)
1176 {
1177         struct bcm_device *dev;
1178         int ret;
1179
1180         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1181         if (!dev)
1182                 return -ENOMEM;
1183
1184         dev->dev = &pdev->dev;
1185         dev->irq = platform_get_irq(pdev, 0);
1186
1187         /* Initialize routing field to an unused value */
1188         dev->pcm_int_params[0] = 0xff;
1189
1190         if (has_acpi_companion(&pdev->dev)) {
1191                 ret = bcm_acpi_probe(dev);
1192                 if (ret)
1193                         return ret;
1194         }
1195
1196         ret = bcm_get_resources(dev);
1197         if (ret)
1198                 return ret;
1199
1200         platform_set_drvdata(pdev, dev);
1201
1202         dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1203
1204         /* Place this instance on the device list */
1205         mutex_lock(&bcm_device_lock);
1206         list_add_tail(&dev->list, &bcm_device_list);
1207         mutex_unlock(&bcm_device_lock);
1208
1209         ret = bcm_gpio_set_power(dev, false);
1210         if (ret)
1211                 dev_err(&pdev->dev, "Failed to power down\n");
1212
1213         return 0;
1214 }
1215
1216 static int bcm_remove(struct platform_device *pdev)
1217 {
1218         struct bcm_device *dev = platform_get_drvdata(pdev);
1219
1220         mutex_lock(&bcm_device_lock);
1221         list_del(&dev->list);
1222         mutex_unlock(&bcm_device_lock);
1223
1224         dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1225
1226         return 0;
1227 }
1228
1229 static const struct hci_uart_proto bcm_proto = {
1230         .id             = HCI_UART_BCM,
1231         .name           = "Broadcom",
1232         .manufacturer   = 15,
1233         .init_speed     = 115200,
1234         .open           = bcm_open,
1235         .close          = bcm_close,
1236         .flush          = bcm_flush,
1237         .setup          = bcm_setup,
1238         .set_baudrate   = bcm_set_baudrate,
1239         .recv           = bcm_recv,
1240         .enqueue        = bcm_enqueue,
1241         .dequeue        = bcm_dequeue,
1242 };
1243
1244 #ifdef CONFIG_ACPI
1245 static const struct acpi_device_id bcm_acpi_match[] = {
1246         { "BCM2E00" },
1247         { "BCM2E01" },
1248         { "BCM2E02" },
1249         { "BCM2E03" },
1250         { "BCM2E04" },
1251         { "BCM2E05" },
1252         { "BCM2E06" },
1253         { "BCM2E07" },
1254         { "BCM2E08" },
1255         { "BCM2E09" },
1256         { "BCM2E0A" },
1257         { "BCM2E0B" },
1258         { "BCM2E0C" },
1259         { "BCM2E0D" },
1260         { "BCM2E0E" },
1261         { "BCM2E0F" },
1262         { "BCM2E10" },
1263         { "BCM2E11" },
1264         { "BCM2E12" },
1265         { "BCM2E13" },
1266         { "BCM2E14" },
1267         { "BCM2E15" },
1268         { "BCM2E16" },
1269         { "BCM2E17" },
1270         { "BCM2E18" },
1271         { "BCM2E19" },
1272         { "BCM2E1A" },
1273         { "BCM2E1B" },
1274         { "BCM2E1C" },
1275         { "BCM2E1D" },
1276         { "BCM2E1F" },
1277         { "BCM2E20" },
1278         { "BCM2E21" },
1279         { "BCM2E22" },
1280         { "BCM2E23" },
1281         { "BCM2E24" },
1282         { "BCM2E25" },
1283         { "BCM2E26" },
1284         { "BCM2E27" },
1285         { "BCM2E28" },
1286         { "BCM2E29" },
1287         { "BCM2E2A" },
1288         { "BCM2E2B" },
1289         { "BCM2E2C" },
1290         { "BCM2E2D" },
1291         { "BCM2E2E" },
1292         { "BCM2E2F" },
1293         { "BCM2E30" },
1294         { "BCM2E31" },
1295         { "BCM2E32" },
1296         { "BCM2E33" },
1297         { "BCM2E34" },
1298         { "BCM2E35" },
1299         { "BCM2E36" },
1300         { "BCM2E37" },
1301         { "BCM2E38" },
1302         { "BCM2E39" },
1303         { "BCM2E3A" },
1304         { "BCM2E3B" },
1305         { "BCM2E3C" },
1306         { "BCM2E3D" },
1307         { "BCM2E3E" },
1308         { "BCM2E3F" },
1309         { "BCM2E40" },
1310         { "BCM2E41" },
1311         { "BCM2E42" },
1312         { "BCM2E43" },
1313         { "BCM2E44" },
1314         { "BCM2E45" },
1315         { "BCM2E46" },
1316         { "BCM2E47" },
1317         { "BCM2E48" },
1318         { "BCM2E49" },
1319         { "BCM2E4A" },
1320         { "BCM2E4B" },
1321         { "BCM2E4C" },
1322         { "BCM2E4D" },
1323         { "BCM2E4E" },
1324         { "BCM2E4F" },
1325         { "BCM2E50" },
1326         { "BCM2E51" },
1327         { "BCM2E52" },
1328         { "BCM2E53" },
1329         { "BCM2E54" },
1330         { "BCM2E55" },
1331         { "BCM2E56" },
1332         { "BCM2E57" },
1333         { "BCM2E58" },
1334         { "BCM2E59" },
1335         { "BCM2E5A" },
1336         { "BCM2E5B" },
1337         { "BCM2E5C" },
1338         { "BCM2E5D" },
1339         { "BCM2E5E" },
1340         { "BCM2E5F" },
1341         { "BCM2E60" },
1342         { "BCM2E61" },
1343         { "BCM2E62" },
1344         { "BCM2E63" },
1345         { "BCM2E64" },
1346         { "BCM2E65" },
1347         { "BCM2E66" },
1348         { "BCM2E67" },
1349         { "BCM2E68" },
1350         { "BCM2E69" },
1351         { "BCM2E6B" },
1352         { "BCM2E6D" },
1353         { "BCM2E6E" },
1354         { "BCM2E6F" },
1355         { "BCM2E70" },
1356         { "BCM2E71" },
1357         { "BCM2E72" },
1358         { "BCM2E73" },
1359         { "BCM2E74" },
1360         { "BCM2E75" },
1361         { "BCM2E76" },
1362         { "BCM2E77" },
1363         { "BCM2E78" },
1364         { "BCM2E79" },
1365         { "BCM2E7A" },
1366         { "BCM2E7B" },
1367         { "BCM2E7C" },
1368         { "BCM2E7D" },
1369         { "BCM2E7E" },
1370         { "BCM2E7F" },
1371         { "BCM2E80" },
1372         { "BCM2E81" },
1373         { "BCM2E82" },
1374         { "BCM2E83" },
1375         { "BCM2E84" },
1376         { "BCM2E85" },
1377         { "BCM2E86" },
1378         { "BCM2E87" },
1379         { "BCM2E88" },
1380         { "BCM2E89" },
1381         { "BCM2E8A" },
1382         { "BCM2E8B" },
1383         { "BCM2E8C" },
1384         { "BCM2E8D" },
1385         { "BCM2E8E" },
1386         { "BCM2E90" },
1387         { "BCM2E92" },
1388         { "BCM2E93" },
1389         { "BCM2E94" },
1390         { "BCM2E95" },
1391         { "BCM2E96" },
1392         { "BCM2E97" },
1393         { "BCM2E98" },
1394         { "BCM2E99" },
1395         { "BCM2E9A" },
1396         { "BCM2E9B" },
1397         { "BCM2E9C" },
1398         { "BCM2E9D" },
1399         { "BCM2EA0" },
1400         { "BCM2EA1" },
1401         { "BCM2EA2" },
1402         { "BCM2EA3" },
1403         { "BCM2EA4" },
1404         { "BCM2EA5" },
1405         { "BCM2EA6" },
1406         { "BCM2EA7" },
1407         { "BCM2EA8" },
1408         { "BCM2EA9" },
1409         { "BCM2EAA" },
1410         { "BCM2EAB" },
1411         { "BCM2EAC" },
1412         { },
1413 };
1414 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1415 #endif
1416
1417 /* suspend and resume callbacks */
1418 static const struct dev_pm_ops bcm_pm_ops = {
1419         SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1420         SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1421 };
1422
1423 static struct platform_driver bcm_driver = {
1424         .probe = bcm_probe,
1425         .remove = bcm_remove,
1426         .driver = {
1427                 .name = "hci_bcm",
1428                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1429                 .pm = &bcm_pm_ops,
1430         },
1431 };
1432
1433 static int bcm_serdev_probe(struct serdev_device *serdev)
1434 {
1435         struct bcm_device *bcmdev;
1436         const struct bcm_device_data *data;
1437         int err;
1438
1439         bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1440         if (!bcmdev)
1441                 return -ENOMEM;
1442
1443         bcmdev->dev = &serdev->dev;
1444 #ifdef CONFIG_PM
1445         bcmdev->hu = &bcmdev->serdev_hu;
1446 #endif
1447         bcmdev->serdev_hu.serdev = serdev;
1448         serdev_device_set_drvdata(serdev, bcmdev);
1449
1450         /* Initialize routing field to an unused value */
1451         bcmdev->pcm_int_params[0] = 0xff;
1452
1453         if (has_acpi_companion(&serdev->dev))
1454                 err = bcm_acpi_probe(bcmdev);
1455         else
1456                 err = bcm_of_probe(bcmdev);
1457         if (err)
1458                 return err;
1459
1460         err = bcm_get_resources(bcmdev);
1461         if (err)
1462                 return err;
1463
1464         if (!bcmdev->shutdown) {
1465                 dev_warn(&serdev->dev,
1466                          "No reset resource, using default baud rate\n");
1467                 bcmdev->oper_speed = bcmdev->init_speed;
1468         }
1469
1470         err = bcm_gpio_set_power(bcmdev, false);
1471         if (err)
1472                 dev_err(&serdev->dev, "Failed to power down\n");
1473
1474         data = device_get_match_data(bcmdev->dev);
1475         if (data) {
1476                 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
1477                 bcmdev->drive_rts_on_open = data->drive_rts_on_open;
1478         }
1479
1480         return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1481 }
1482
1483 static void bcm_serdev_remove(struct serdev_device *serdev)
1484 {
1485         struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1486
1487         hci_uart_unregister_device(&bcmdev->serdev_hu);
1488 }
1489
1490 #ifdef CONFIG_OF
1491 static struct bcm_device_data bcm4354_device_data = {
1492         .no_early_set_baudrate = true,
1493 };
1494
1495 static struct bcm_device_data bcm43438_device_data = {
1496         .drive_rts_on_open = true,
1497 };
1498
1499 static const struct of_device_id bcm_bluetooth_of_match[] = {
1500         { .compatible = "brcm,bcm20702a1" },
1501         { .compatible = "brcm,bcm4329-bt" },
1502         { .compatible = "brcm,bcm4330-bt" },
1503         { .compatible = "brcm,bcm4334-bt" },
1504         { .compatible = "brcm,bcm4345c5" },
1505         { .compatible = "brcm,bcm4330-bt" },
1506         { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
1507         { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
1508         { .compatible = "brcm,bcm4335a0" },
1509         { },
1510 };
1511 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1512 #endif
1513
1514 static struct serdev_device_driver bcm_serdev_driver = {
1515         .probe = bcm_serdev_probe,
1516         .remove = bcm_serdev_remove,
1517         .driver = {
1518                 .name = "hci_uart_bcm",
1519                 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1520                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1521                 .pm = &bcm_pm_ops,
1522         },
1523 };
1524
1525 int __init bcm_init(void)
1526 {
1527         /* For now, we need to keep both platform device
1528          * driver (ACPI generated) and serdev driver (DT).
1529          */
1530         platform_driver_register(&bcm_driver);
1531         serdev_device_driver_register(&bcm_serdev_driver);
1532
1533         return hci_uart_register_proto(&bcm_proto);
1534 }
1535
1536 int __exit bcm_deinit(void)
1537 {
1538         platform_driver_unregister(&bcm_driver);
1539         serdev_device_driver_unregister(&bcm_serdev_driver);
1540
1541         return hci_uart_unregister_proto(&bcm_proto);
1542 }