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  * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
  55  */
  56 struct bcm_device_data {
  57         bool    no_early_set_baudrate;
  58         bool    drive_rts_on_open;
  59 };
  60
  61 /**
  62  * struct bcm_device - device driver resources
  63  * @serdev_hu: HCI UART controller struct
  64  * @list: bcm_device_list node
  65  * @dev: physical UART slave
  66  * @name: device name logged by bt_dev_*() functions
  67  * @device_wakeup: BT_WAKE pin,
  68  *      assert = Bluetooth device must wake up or remain awake,
  69  *      deassert = Bluetooth device may sleep when sleep criteria are met
  70  * @shutdown: BT_REG_ON pin,
  71  *      power up or power down Bluetooth device internal regulators
  72  * @reset: BT_RST_N pin,
  73  *      active low resets the Bluetooth logic core
  74  * @set_device_wakeup: callback to toggle BT_WAKE pin
  75  *      either by accessing @device_wakeup or by calling @btlp
  76  * @set_shutdown: callback to toggle BT_REG_ON pin
  77  *      either by accessing @shutdown or by calling @btpu/@btpd
  78  * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
  79  * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
  80  * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
  81  * @gpio_count: internal counter for GPIO resources associated with ACPI device
  82  * @gpio_int_idx: index in _CRS for GpioInt() resource
  83  * @txco_clk: external reference frequency clock used by Bluetooth device
  84  * @lpo_clk: external LPO clock used by Bluetooth device
  85  * @supplies: VBAT and VDDIO supplies used by Bluetooth device
  86  * @res_enabled: whether clocks and supplies are prepared and enabled
  87  * @init_speed: default baudrate of Bluetooth device;
  88  *      the host UART is initially set to this baudrate so that
  89  *      it can configure the Bluetooth device for @oper_speed
  90  * @oper_speed: preferred baudrate of Bluetooth device;
  91  *      set to 0 if @init_speed is already the preferred baudrate
  92  * @irq: interrupt triggered by HOST_WAKE_BT pin
  93  * @irq_active_low: whether @irq is active low
  94  * @irq_acquired: flag to show if IRQ handler has been assigned
  95  * @hu: pointer to HCI UART controller struct,
  96  *      used to disable flow control during runtime suspend and system sleep
  97  * @is_suspended: whether flow control is currently disabled
  98  * @no_early_set_baudrate: don't set_baudrate before setup()
  99  * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
 100  * @pcm_int_params: keep the initial PCM configuration
 101  */
 102 struct bcm_device {
 103         /* Must be the first member, hci_serdev.c expects this. */
 104         struct hci_uart         serdev_hu;
 105         struct list_head        list;
 106
 107         struct device           *dev;
 108
 109         const char              *name;
 110         struct gpio_desc        *device_wakeup;
 111         struct gpio_desc        *shutdown;
 112         struct gpio_desc        *reset;
 113         int                     (*set_device_wakeup)(struct bcm_device *, bool);
 114         int                     (*set_shutdown)(struct bcm_device *, bool);
 115 #ifdef CONFIG_ACPI
 116         acpi_handle             btlp, btpu, btpd;
 117         int                     gpio_count;
 118         int                     gpio_int_idx;
 119 #endif
 120
 121         struct clk              *txco_clk;
 122         struct clk              *lpo_clk;
 123         struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
 124         bool                    res_enabled;
 125
 126         u32                     init_speed;
 127         u32                     oper_speed;
 128         int                     irq;
 129         bool                    irq_active_low;
 130         bool                    irq_acquired;
 131
 132 #ifdef CONFIG_PM
 133         struct hci_uart         *hu;
 134         bool                    is_suspended;
 135 #endif
 136         bool                    no_early_set_baudrate;
 137         bool                    drive_rts_on_open;
 138         u8                      pcm_int_params[5];
 139 };
 140
 141 /* generic bcm uart resources */
 142 struct bcm_data {
 143         struct sk_buff          *rx_skb;
 144         struct sk_buff_head     txq;
 145
 146         struct bcm_device       *dev;
 147 };
 148
 149 /* List of BCM BT UART devices */
 150 static DEFINE_MUTEX(bcm_device_lock);
 151 static LIST_HEAD(bcm_device_list);
 152
 153 static int irq_polarity = -1;
 154 module_param(irq_polarity, int, 0444);
 155 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
 156
 157 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
 158 {
 159         if (hu->serdev)
 160                 serdev_device_set_baudrate(hu->serdev, speed);
 161         else
 162                 hci_uart_set_baudrate(hu, speed);
 163 }
 164
 165 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
 166 {
 167         struct hci_dev *hdev = hu->hdev;
 168         struct sk_buff *skb;
 169         struct bcm_update_uart_baud_rate param;
 170
 171         if (speed > 3000000) {
 172                 struct bcm_write_uart_clock_setting clock;
 173
 174                 clock.type = BCM_UART_CLOCK_48MHZ;
 175
 176                 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
 177
 178                 /* This Broadcom specific command changes the UART's controller
 179                  * clock for baud rate > 3000000.
 180                  */
 181                 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
 182                 if (IS_ERR(skb)) {
 183                         int err = PTR_ERR(skb);
 184                         bt_dev_err(hdev, "BCM: failed to write clock (%d)",
 185                                    err);
 186                         return err;
 187                 }
 188
 189                 kfree_skb(skb);
 190         }
 191
 192         bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
 193
 194         param.zero = cpu_to_le16(0);
 195         param.baud_rate = cpu_to_le32(speed);
 196
 197         /* This Broadcom specific command changes the UART's controller baud
 198          * rate.
 199          */
 200         skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
 201                              HCI_INIT_TIMEOUT);
 202         if (IS_ERR(skb)) {
 203                 int err = PTR_ERR(skb);
 204                 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
 205                            err);
 206                 return err;
 207         }
 208
 209         kfree_skb(skb);
 210
 211         return 0;
 212 }
 213
 214 /* bcm_device_exists should be protected by bcm_device_lock */
 215 static bool bcm_device_exists(struct bcm_device *device)
 216 {
 217         struct list_head *p;
 218
 219 #ifdef CONFIG_PM
 220         /* Devices using serdev always exist */
 221         if (device && device->hu && device->hu->serdev)
 222                 return true;
 223 #endif
 224
 225         list_for_each(p, &bcm_device_list) {
 226                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 227
 228                 if (device == dev)
 229                         return true;
 230         }
 231
 232         return false;
 233 }
 234
 235 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 236 {
 237         int err;
 238
 239         if (powered && !dev->res_enabled) {
 240                 /* Intel Macs use bcm_apple_get_resources() and don't
 241                  * have regulator supplies configured.
 242                  */
 243                 if (dev->supplies[0].supply) {
 244                         err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
 245                                                     dev->supplies);
 246                         if (err)
 247                                 return err;
 248                 }
 249
 250                 /* LPO clock needs to be 32.768 kHz */
 251                 err = clk_set_rate(dev->lpo_clk, 32768);
 252                 if (err) {
 253                         dev_err(dev->dev, "Could not set LPO clock rate\n");
 254                         goto err_regulator_disable;
 255                 }
 256
 257                 err = clk_prepare_enable(dev->lpo_clk);
 258                 if (err)
 259                         goto err_regulator_disable;
 260
 261                 err = clk_prepare_enable(dev->txco_clk);
 262                 if (err)
 263                         goto err_lpo_clk_disable;
 264         }
 265
 266         err = dev->set_shutdown(dev, powered);
 267         if (err)
 268                 goto err_txco_clk_disable;
 269
 270         err = dev->set_device_wakeup(dev, powered);
 271         if (err)
 272                 goto err_revert_shutdown;
 273
 274         if (!powered && dev->res_enabled) {
 275                 clk_disable_unprepare(dev->txco_clk);
 276                 clk_disable_unprepare(dev->lpo_clk);
 277
 278                 /* Intel Macs use bcm_apple_get_resources() and don't
 279                  * have regulator supplies configured.
 280                  */
 281                 if (dev->supplies[0].supply)
 282                         regulator_bulk_disable(BCM_NUM_SUPPLIES,
 283                                                dev->supplies);
 284         }
 285
 286         /* wait for device to power on and come out of reset */
 287         usleep_range(100000, 120000);
 288
 289         dev->res_enabled = powered;
 290
 291         return 0;
 292
 293 err_revert_shutdown:
 294         dev->set_shutdown(dev, !powered);
 295 err_txco_clk_disable:
 296         if (powered && !dev->res_enabled)
 297                 clk_disable_unprepare(dev->txco_clk);
 298 err_lpo_clk_disable:
 299         if (powered && !dev->res_enabled)
 300                 clk_disable_unprepare(dev->lpo_clk);
 301 err_regulator_disable:
 302         if (powered && !dev->res_enabled)
 303                 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
 304         return err;
 305 }
 306
 307 #ifdef CONFIG_PM
 308 static irqreturn_t bcm_host_wake(int irq, void *data)
 309 {
 310         struct bcm_device *bdev = data;
 311
 312         bt_dev_dbg(bdev, "Host wake IRQ");
 313
 314         pm_runtime_get(bdev->dev);
 315         pm_runtime_mark_last_busy(bdev->dev);
 316         pm_runtime_put_autosuspend(bdev->dev);
 317
 318         return IRQ_HANDLED;
 319 }
 320
 321 static int bcm_request_irq(struct bcm_data *bcm)
 322 {
 323         struct bcm_device *bdev = bcm->dev;
 324         int err;
 325
 326         mutex_lock(&bcm_device_lock);
 327         if (!bcm_device_exists(bdev)) {
 328                 err = -ENODEV;
 329                 goto unlock;
 330         }
 331
 332         if (bdev->irq <= 0) {
 333                 err = -EOPNOTSUPP;
 334                 goto unlock;
 335         }
 336
 337         err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
 338                                bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
 339                                                       IRQF_TRIGGER_RISING,
 340                                "host_wake", bdev);
 341         if (err) {
 342                 bdev->irq = err;
 343                 goto unlock;
 344         }
 345
 346         bdev->irq_acquired = true;
 347
 348         device_init_wakeup(bdev->dev, true);
 349
 350         pm_runtime_set_autosuspend_delay(bdev->dev,
 351                                          BCM_AUTOSUSPEND_DELAY);
 352         pm_runtime_use_autosuspend(bdev->dev);
 353         pm_runtime_set_active(bdev->dev);
 354         pm_runtime_enable(bdev->dev);
 355
 356 unlock:
 357         mutex_unlock(&bcm_device_lock);
 358
 359         return err;
 360 }
 361
 362 static const struct bcm_set_sleep_mode default_sleep_params = {
 363         .sleep_mode = 1,        /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
 364         .idle_host = 2,         /* idle threshold HOST, in 300ms */
 365         .idle_dev = 2,          /* idle threshold device, in 300ms */
 366         .bt_wake_active = 1,    /* BT_WAKE active mode: 1 = high, 0 = low */
 367         .host_wake_active = 0,  /* HOST_WAKE active mode: 1 = high, 0 = low */
 368         .allow_host_sleep = 1,  /* Allow host sleep in SCO flag */
 369         .combine_modes = 1,     /* Combine sleep and LPM flag */
 370         .tristate_control = 0,  /* Allow tri-state control of UART tx flag */
 371         /* Irrelevant USB flags */
 372         .usb_auto_sleep = 0,
 373         .usb_resume_timeout = 0,
 374         .break_to_host = 0,
 375         .pulsed_host_wake = 1,
 376 };
 377
 378 static int bcm_setup_sleep(struct hci_uart *hu)
 379 {
 380         struct bcm_data *bcm = hu->priv;
 381         struct sk_buff *skb;
 382         struct bcm_set_sleep_mode sleep_params = default_sleep_params;
 383
 384         sleep_params.host_wake_active = !bcm->dev->irq_active_low;
 385
 386         skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
 387                              &sleep_params, HCI_INIT_TIMEOUT);
 388         if (IS_ERR(skb)) {
 389                 int err = PTR_ERR(skb);
 390                 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
 391                 return err;
 392         }
 393         kfree_skb(skb);
 394
 395         bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
 396
 397         return 0;
 398 }
 399 #else
 400 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
 401 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
 402 #endif
 403
 404 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
 405 {
 406         struct hci_uart *hu = hci_get_drvdata(hdev);
 407         struct bcm_data *bcm = hu->priv;
 408         struct sk_buff *skb;
 409
 410         if (!test_bit(HCI_RUNNING, &hdev->flags))
 411                 return -ENETDOWN;
 412
 413         skb = bt_skb_alloc(3, GFP_KERNEL);
 414         if (!skb)
 415                 return -ENOMEM;
 416
 417         skb_put_u8(skb, BCM_LM_DIAG_PKT);
 418         skb_put_u8(skb, 0xf0);
 419         skb_put_u8(skb, enable);
 420
 421         skb_queue_tail(&bcm->txq, skb);
 422         hci_uart_tx_wakeup(hu);
 423
 424         return 0;
 425 }
 426
 427 static int bcm_open(struct hci_uart *hu)
 428 {
 429         struct bcm_data *bcm;
 430         struct list_head *p;
 431         int err;
 432
 433         bt_dev_dbg(hu->hdev, "hu %p", hu);
 434
 435         if (!hci_uart_has_flow_control(hu))
 436                 return -EOPNOTSUPP;
 437
 438         bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
 439         if (!bcm)
 440                 return -ENOMEM;
 441
 442         skb_queue_head_init(&bcm->txq);
 443
 444         hu->priv = bcm;
 445
 446         mutex_lock(&bcm_device_lock);
 447
 448         if (hu->serdev) {
 449                 bcm->dev = serdev_device_get_drvdata(hu->serdev);
 450                 goto out;
 451         }
 452
 453         if (!hu->tty->dev)
 454                 goto out;
 455
 456         list_for_each(p, &bcm_device_list) {
 457                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 458
 459                 /* Retrieve saved bcm_device based on parent of the
 460                  * platform device (saved during device probe) and
 461                  * parent of tty device used by hci_uart
 462                  */
 463                 if (hu->tty->dev->parent == dev->dev->parent) {
 464                         bcm->dev = dev;
 465 #ifdef CONFIG_PM
 466                         dev->hu = hu;
 467 #endif
 468                         break;
 469                 }
 470         }
 471
 472 out:
 473         if (bcm->dev) {
 474                 if (bcm->dev->drive_rts_on_open)
 475                         hci_uart_set_flow_control(hu, true);
 476
 477                 hu->init_speed = bcm->dev->init_speed;
 478
 479                 /* If oper_speed is set, ldisc/serdev will set the baudrate
 480                  * before calling setup()
 481                  */
 482                 if (!bcm->dev->no_early_set_baudrate)
 483                         hu->oper_speed = bcm->dev->oper_speed;
 484
 485                 err = bcm_gpio_set_power(bcm->dev, true);
 486
 487                 if (bcm->dev->drive_rts_on_open)
 488                         hci_uart_set_flow_control(hu, false);
 489
 490                 if (err)
 491                         goto err_unset_hu;
 492         }
 493
 494         mutex_unlock(&bcm_device_lock);
 495         return 0;
 496
 497 err_unset_hu:
 498 #ifdef CONFIG_PM
 499         if (!hu->serdev)
 500                 bcm->dev->hu = NULL;
 501 #endif
 502         mutex_unlock(&bcm_device_lock);
 503         hu->priv = NULL;
 504         kfree(bcm);
 505         return err;
 506 }
 507
 508 static int bcm_close(struct hci_uart *hu)
 509 {
 510         struct bcm_data *bcm = hu->priv;
 511         struct bcm_device *bdev = NULL;
 512         int err;
 513
 514         bt_dev_dbg(hu->hdev, "hu %p", hu);
 515
 516         /* Protect bcm->dev against removal of the device or driver */
 517         mutex_lock(&bcm_device_lock);
 518
 519         if (hu->serdev) {
 520                 bdev = serdev_device_get_drvdata(hu->serdev);
 521         } else if (bcm_device_exists(bcm->dev)) {
 522                 bdev = bcm->dev;
 523 #ifdef CONFIG_PM
 524                 bdev->hu = NULL;
 525 #endif
 526         }
 527
 528         if (bdev) {
 529                 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) {
 530                         devm_free_irq(bdev->dev, bdev->irq, bdev);
 531                         device_init_wakeup(bdev->dev, false);
 532                         pm_runtime_disable(bdev->dev);
 533                 }
 534
 535                 err = bcm_gpio_set_power(bdev, false);
 536                 if (err)
 537                         bt_dev_err(hu->hdev, "Failed to power down");
 538                 else
 539                         pm_runtime_set_suspended(bdev->dev);
 540         }
 541         mutex_unlock(&bcm_device_lock);
 542
 543         skb_queue_purge(&bcm->txq);
 544         kfree_skb(bcm->rx_skb);
 545         kfree(bcm);
 546
 547         hu->priv = NULL;
 548         return 0;
 549 }
 550
 551 static int bcm_flush(struct hci_uart *hu)
 552 {
 553         struct bcm_data *bcm = hu->priv;
 554
 555         bt_dev_dbg(hu->hdev, "hu %p", hu);
 556
 557         skb_queue_purge(&bcm->txq);
 558
 559         return 0;
 560 }
 561
 562 static int bcm_setup(struct hci_uart *hu)
 563 {
 564         struct bcm_data *bcm = hu->priv;
 565         bool fw_load_done = false;
 566         unsigned int speed;
 567         int err;
 568
 569         bt_dev_dbg(hu->hdev, "hu %p", hu);
 570
 571         hu->hdev->set_diag = bcm_set_diag;
 572         hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 573
 574         err = btbcm_initialize(hu->hdev, &fw_load_done);
 575         if (err)
 576                 return err;
 577
 578         if (!fw_load_done)
 579                 return 0;
 580
 581         /* Init speed if any */
 582         if (hu->init_speed)
 583                 speed = hu->init_speed;
 584         else if (hu->proto->init_speed)
 585                 speed = hu->proto->init_speed;
 586         else
 587                 speed = 0;
 588
 589         if (speed)
 590                 host_set_baudrate(hu, speed);
 591
 592         /* Operational speed if any */
 593         if (hu->oper_speed)
 594                 speed = hu->oper_speed;
 595         else if (bcm->dev && bcm->dev->oper_speed)
 596                 speed = bcm->dev->oper_speed;
 597         else if (hu->proto->oper_speed)
 598                 speed = hu->proto->oper_speed;
 599         else
 600                 speed = 0;
 601
 602         if (speed) {
 603                 err = bcm_set_baudrate(hu, speed);
 604                 if (!err)
 605                         host_set_baudrate(hu, speed);
 606         }
 607
 608         /* PCM parameters if provided */
 609         if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
 610                 struct bcm_set_pcm_int_params params;
 611
 612                 btbcm_read_pcm_int_params(hu->hdev, &params);
 613
 614                 memcpy(&params, bcm->dev->pcm_int_params, 5);
 615                 btbcm_write_pcm_int_params(hu->hdev, &params);
 616         }
 617
 618         err = btbcm_finalize(hu->hdev, &fw_load_done);
 619         if (err)
 620                 return err;
 621
 622         /* Some devices ship with the controller default address.
 623          * Allow the bootloader to set a valid address through the
 624          * device tree.
 625          */
 626         set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks);
 627
 628         if (!bcm_request_irq(bcm))
 629                 err = bcm_setup_sleep(hu);
 630
 631         return err;
 632 }
 633
 634 #define BCM_RECV_LM_DIAG \
 635         .type = BCM_LM_DIAG_PKT, \
 636         .hlen = BCM_LM_DIAG_SIZE, \
 637         .loff = 0, \
 638         .lsize = 0, \
 639         .maxlen = BCM_LM_DIAG_SIZE
 640
 641 #define BCM_RECV_NULL \
 642         .type = BCM_NULL_PKT, \
 643         .hlen = BCM_NULL_SIZE, \
 644         .loff = 0, \
 645         .lsize = 0, \
 646         .maxlen = BCM_NULL_SIZE
 647
 648 #define BCM_RECV_TYPE49 \
 649         .type = BCM_TYPE49_PKT, \
 650         .hlen = BCM_TYPE49_SIZE, \
 651         .loff = 0, \
 652         .lsize = 0, \
 653         .maxlen = BCM_TYPE49_SIZE
 654
 655 #define BCM_RECV_TYPE52 \
 656         .type = BCM_TYPE52_PKT, \
 657         .hlen = BCM_TYPE52_SIZE, \
 658         .loff = 0, \
 659         .lsize = 0, \
 660         .maxlen = BCM_TYPE52_SIZE
 661
 662 static const struct h4_recv_pkt bcm_recv_pkts[] = {
 663         { H4_RECV_ACL,      .recv = hci_recv_frame },
 664         { H4_RECV_SCO,      .recv = hci_recv_frame },
 665         { H4_RECV_EVENT,    .recv = hci_recv_frame },
 666         { H4_RECV_ISO,      .recv = hci_recv_frame },
 667         { BCM_RECV_LM_DIAG, .recv = hci_recv_diag  },
 668         { BCM_RECV_NULL,    .recv = hci_recv_diag  },
 669         { BCM_RECV_TYPE49,  .recv = hci_recv_diag  },
 670         { BCM_RECV_TYPE52,  .recv = hci_recv_diag  },
 671 };
 672
 673 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 674 {
 675         struct bcm_data *bcm = hu->priv;
 676
 677         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 678                 return -EUNATCH;
 679
 680         bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
 681                                   bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
 682         if (IS_ERR(bcm->rx_skb)) {
 683                 int err = PTR_ERR(bcm->rx_skb);
 684                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
 685                 bcm->rx_skb = NULL;
 686                 return err;
 687         } else if (!bcm->rx_skb) {
 688                 /* Delay auto-suspend when receiving completed packet */
 689                 mutex_lock(&bcm_device_lock);
 690                 if (bcm->dev && bcm_device_exists(bcm->dev)) {
 691                         pm_runtime_get(bcm->dev->dev);
 692                         pm_runtime_mark_last_busy(bcm->dev->dev);
 693                         pm_runtime_put_autosuspend(bcm->dev->dev);
 694                 }
 695                 mutex_unlock(&bcm_device_lock);
 696         }
 697
 698         return count;
 699 }
 700
 701 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 702 {
 703         struct bcm_data *bcm = hu->priv;
 704
 705         bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
 706
 707         /* Prepend skb with frame type */
 708         memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 709         skb_queue_tail(&bcm->txq, skb);
 710
 711         return 0;
 712 }
 713
 714 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
 715 {
 716         struct bcm_data *bcm = hu->priv;
 717         struct sk_buff *skb = NULL;
 718         struct bcm_device *bdev = NULL;
 719
 720         mutex_lock(&bcm_device_lock);
 721
 722         if (bcm_device_exists(bcm->dev)) {
 723                 bdev = bcm->dev;
 724                 pm_runtime_get_sync(bdev->dev);
 725                 /* Shall be resumed here */
 726         }
 727
 728         skb = skb_dequeue(&bcm->txq);
 729
 730         if (bdev) {
 731                 pm_runtime_mark_last_busy(bdev->dev);
 732                 pm_runtime_put_autosuspend(bdev->dev);
 733         }
 734
 735         mutex_unlock(&bcm_device_lock);
 736
 737         return skb;
 738 }
 739
 740 #ifdef CONFIG_PM
 741 static int bcm_suspend_device(struct device *dev)
 742 {
 743         struct bcm_device *bdev = dev_get_drvdata(dev);
 744         int err;
 745
 746         bt_dev_dbg(bdev, "");
 747
 748         if (!bdev->is_suspended && bdev->hu) {
 749                 hci_uart_set_flow_control(bdev->hu, true);
 750
 751                 /* Once this returns, driver suspends BT via GPIO */
 752                 bdev->is_suspended = true;
 753         }
 754
 755         /* Suspend the device */
 756         err = bdev->set_device_wakeup(bdev, false);
 757         if (err) {
 758                 if (bdev->is_suspended && bdev->hu) {
 759                         bdev->is_suspended = false;
 760                         hci_uart_set_flow_control(bdev->hu, false);
 761                 }
 762                 return -EBUSY;
 763         }
 764
 765         bt_dev_dbg(bdev, "suspend, delaying 15 ms");
 766         msleep(15);
 767
 768         return 0;
 769 }
 770
 771 static int bcm_resume_device(struct device *dev)
 772 {
 773         struct bcm_device *bdev = dev_get_drvdata(dev);
 774         int err;
 775
 776         bt_dev_dbg(bdev, "");
 777
 778         err = bdev->set_device_wakeup(bdev, true);
 779         if (err) {
 780                 dev_err(dev, "Failed to power up\n");
 781                 return err;
 782         }
 783
 784         bt_dev_dbg(bdev, "resume, delaying 15 ms");
 785         msleep(15);
 786
 787         /* When this executes, the device has woken up already */
 788         if (bdev->is_suspended && bdev->hu) {
 789                 bdev->is_suspended = false;
 790
 791                 hci_uart_set_flow_control(bdev->hu, false);
 792         }
 793
 794         return 0;
 795 }
 796 #endif
 797
 798 #ifdef CONFIG_PM_SLEEP
 799 /* suspend callback */
 800 static int bcm_suspend(struct device *dev)
 801 {
 802         struct bcm_device *bdev = dev_get_drvdata(dev);
 803         int error;
 804
 805         bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
 806
 807         /*
 808          * When used with a device instantiated as platform_device, bcm_suspend
 809          * can be called at any time as long as the platform device is bound,
 810          * so it should use bcm_device_lock to protect access to hci_uart
 811          * and device_wake-up GPIO.
 812          */
 813         mutex_lock(&bcm_device_lock);
 814
 815         if (!bdev->hu)
 816                 goto unlock;
 817
 818         if (pm_runtime_active(dev))
 819                 bcm_suspend_device(dev);
 820
 821         if (device_may_wakeup(dev) && bdev->irq > 0) {
 822                 error = enable_irq_wake(bdev->irq);
 823                 if (!error)
 824                         bt_dev_dbg(bdev, "BCM irq: enabled");
 825         }
 826
 827 unlock:
 828         mutex_unlock(&bcm_device_lock);
 829
 830         return 0;
 831 }
 832
 833 /* resume callback */
 834 static int bcm_resume(struct device *dev)
 835 {
 836         struct bcm_device *bdev = dev_get_drvdata(dev);
 837         int err = 0;
 838
 839         bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
 840
 841         /*
 842          * When used with a device instantiated as platform_device, bcm_resume
 843          * can be called at any time as long as platform device is bound,
 844          * so it should use bcm_device_lock to protect access to hci_uart
 845          * and device_wake-up GPIO.
 846          */
 847         mutex_lock(&bcm_device_lock);
 848
 849         if (!bdev->hu)
 850                 goto unlock;
 851
 852         if (device_may_wakeup(dev) && bdev->irq > 0) {
 853                 disable_irq_wake(bdev->irq);
 854                 bt_dev_dbg(bdev, "BCM irq: disabled");
 855         }
 856
 857         err = bcm_resume_device(dev);
 858
 859 unlock:
 860         mutex_unlock(&bcm_device_lock);
 861
 862         if (!err) {
 863                 pm_runtime_disable(dev);
 864                 pm_runtime_set_active(dev);
 865                 pm_runtime_enable(dev);
 866         }
 867
 868         return 0;
 869 }
 870 #endif
 871
 872 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
 873 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
 874         {
 875                 .ident = "Meegopad T08",
 876                 .matches = {
 877                         DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
 878                                         "To be filled by OEM."),
 879                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
 880                         DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
 881                 },
 882         },
 883         { }
 884 };
 885
 886 #ifdef CONFIG_ACPI
 887 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
 888 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
 889 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
 890
 891 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
 892         { "device-wakeup-gpios", &first_gpio, 1 },
 893         { "shutdown-gpios", &second_gpio, 1 },
 894         { "host-wakeup-gpios", &third_gpio, 1 },
 895         { },
 896 };
 897
 898 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
 899         { "host-wakeup-gpios", &first_gpio, 1 },
 900         { "device-wakeup-gpios", &second_gpio, 1 },
 901         { "shutdown-gpios", &third_gpio, 1 },
 902         { },
 903 };
 904
 905 static int bcm_resource(struct acpi_resource *ares, void *data)
 906 {
 907         struct bcm_device *dev = data;
 908         struct acpi_resource_extended_irq *irq;
 909         struct acpi_resource_gpio *gpio;
 910         struct acpi_resource_uart_serialbus *sb;
 911
 912         switch (ares->type) {
 913         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 914                 irq = &ares->data.extended_irq;
 915                 if (irq->polarity != ACPI_ACTIVE_LOW)
 916                         dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
 917                 dev->irq_active_low = true;
 918                 break;
 919
 920         case ACPI_RESOURCE_TYPE_GPIO:
 921                 gpio = &ares->data.gpio;
 922                 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
 923                         dev->gpio_int_idx = dev->gpio_count;
 924                         dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
 925                 }
 926                 dev->gpio_count++;
 927                 break;
 928
 929         case ACPI_RESOURCE_TYPE_SERIAL_BUS:
 930                 sb = &ares->data.uart_serial_bus;
 931                 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
 932                         dev->init_speed = sb->default_baud_rate;
 933                         dev->oper_speed = 4000000;
 934                 }
 935                 break;
 936
 937         default:
 938                 break;
 939         }
 940
 941         return 0;
 942 }
 943
 944 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
 945 {
 946         if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
 947                 return -EIO;
 948
 949         return 0;
 950 }
 951
 952 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
 953 {
 954         if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
 955                                               NULL, NULL, NULL)))
 956                 return -EIO;
 957
 958         return 0;
 959 }
 960
 961 static int bcm_apple_get_resources(struct bcm_device *dev)
 962 {
 963         struct acpi_device *adev = ACPI_COMPANION(dev->dev);
 964         const union acpi_object *obj;
 965
 966         if (!adev ||
 967             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
 968             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
 969             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
 970                 return -ENODEV;
 971
 972         if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
 973             obj->buffer.length == 8)
 974                 dev->init_speed = *(u64 *)obj->buffer.pointer;
 975
 976         dev->set_device_wakeup = bcm_apple_set_device_wakeup;
 977         dev->set_shutdown = bcm_apple_set_shutdown;
 978
 979         return 0;
 980 }
 981 #else
 982 static inline int bcm_apple_get_resources(struct bcm_device *dev)
 983 {
 984         return -EOPNOTSUPP;
 985 }
 986 #endif /* CONFIG_ACPI */
 987
 988 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
 989 {
 990         gpiod_set_value_cansleep(dev->device_wakeup, awake);
 991         return 0;
 992 }
 993
 994 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
 995 {
 996         gpiod_set_value_cansleep(dev->shutdown, powered);
 997         if (dev->reset)
 998                 /*
 999                  * The reset line is asserted on powerdown and deasserted
1000                  * on poweron so the inverse of powered is used. Notice
1001                  * that the GPIO line BT_RST_N needs to be specified as
1002                  * active low in the device tree or similar system
1003                  * description.
1004                  */
1005                 gpiod_set_value_cansleep(dev->reset, !powered);
1006         return 0;
1007 }
1008
1009 /* Try a bunch of names for TXCO */
1010 static struct clk *bcm_get_txco(struct device *dev)
1011 {
1012         struct clk *clk;
1013
1014         /* New explicit name */
1015         clk = devm_clk_get(dev, "txco");
1016         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1017                 return clk;
1018
1019         /* Deprecated name */
1020         clk = devm_clk_get(dev, "extclk");
1021         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1022                 return clk;
1023
1024         /* Original code used no name at all */
1025         return devm_clk_get(dev, NULL);
1026 }
1027
1028 static int bcm_get_resources(struct bcm_device *dev)
1029 {
1030         const struct dmi_system_id *dmi_id;
1031         int err;
1032
1033         dev->name = dev_name(dev->dev);
1034
1035         if (x86_apple_machine && !bcm_apple_get_resources(dev))
1036                 return 0;
1037
1038         dev->txco_clk = bcm_get_txco(dev->dev);
1039
1040         /* Handle deferred probing */
1041         if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1042                 return PTR_ERR(dev->txco_clk);
1043
1044         /* Ignore all other errors as before */
1045         if (IS_ERR(dev->txco_clk))
1046                 dev->txco_clk = NULL;
1047
1048         dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1049         if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1050                 return PTR_ERR(dev->lpo_clk);
1051
1052         if (IS_ERR(dev->lpo_clk))
1053                 dev->lpo_clk = NULL;
1054
1055         /* Check if we accidentally fetched the lpo clock twice */
1056         if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1057                 devm_clk_put(dev->dev, dev->txco_clk);
1058                 dev->txco_clk = NULL;
1059         }
1060
1061         dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1062                                                      GPIOD_OUT_LOW);
1063         if (IS_ERR(dev->device_wakeup))
1064                 return PTR_ERR(dev->device_wakeup);
1065
1066         dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1067                                                 GPIOD_OUT_LOW);
1068         if (IS_ERR(dev->shutdown))
1069                 return PTR_ERR(dev->shutdown);
1070
1071         dev->reset = devm_gpiod_get_optional(dev->dev, "reset",
1072                                              GPIOD_OUT_LOW);
1073         if (IS_ERR(dev->reset))
1074                 return PTR_ERR(dev->reset);
1075
1076         dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1077         dev->set_shutdown = bcm_gpio_set_shutdown;
1078
1079         dev->supplies[0].supply = "vbat";
1080         dev->supplies[1].supply = "vddio";
1081         err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1082                                       dev->supplies);
1083         if (err)
1084                 return err;
1085
1086         /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1087         if (dev->irq <= 0) {
1088                 struct gpio_desc *gpio;
1089
1090                 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1091                                                GPIOD_IN);
1092                 if (IS_ERR(gpio))
1093                         return PTR_ERR(gpio);
1094
1095                 dev->irq = gpiod_to_irq(gpio);
1096         }
1097
1098         dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1099         if (dmi_id) {
1100                 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1101                          dmi_id->ident);
1102                 dev->irq = 0;
1103         }
1104
1105         dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1106         return 0;
1107 }
1108
1109 #ifdef CONFIG_ACPI
1110 static int bcm_acpi_probe(struct bcm_device *dev)
1111 {
1112         LIST_HEAD(resources);
1113         const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1114         struct resource_entry *entry;
1115         int ret;
1116
1117         /* Retrieve UART ACPI info */
1118         dev->gpio_int_idx = -1;
1119         ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1120                                      &resources, bcm_resource, dev);
1121         if (ret < 0)
1122                 return ret;
1123
1124         resource_list_for_each_entry(entry, &resources) {
1125                 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1126                         dev->irq = entry->res->start;
1127                         break;
1128                 }
1129         }
1130         acpi_dev_free_resource_list(&resources);
1131
1132         /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1133          * only 2 GPIO resources, we use the irq-last mapping for this, since
1134          * we already have an irq the 3th / last mapping will not be used.
1135          */
1136         if (dev->irq)
1137                 gpio_mapping = acpi_bcm_int_last_gpios;
1138         else if (dev->gpio_int_idx == 0)
1139                 gpio_mapping = acpi_bcm_int_first_gpios;
1140         else if (dev->gpio_int_idx == 2)
1141                 gpio_mapping = acpi_bcm_int_last_gpios;
1142         else
1143                 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1144                          dev->gpio_int_idx);
1145
1146         /* Warn if our expectations are not met. */
1147         if (dev->gpio_count != (dev->irq ? 2 : 3))
1148                 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1149                          dev->gpio_count);
1150
1151         ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1152         if (ret)
1153                 return ret;
1154
1155         if (irq_polarity != -1) {
1156                 dev->irq_active_low = irq_polarity;
1157                 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1158                          dev->irq_active_low ? "low" : "high");
1159         }
1160
1161         return 0;
1162 }
1163 #else
1164 static int bcm_acpi_probe(struct bcm_device *dev)
1165 {
1166         return -EINVAL;
1167 }
1168 #endif /* CONFIG_ACPI */
1169
1170 static int bcm_of_probe(struct bcm_device *bdev)
1171 {
1172         device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1173         device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
1174                                       bdev->pcm_int_params, 5);
1175         bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup");
1176         bdev->irq_active_low = irq_get_trigger_type(bdev->irq)
1177                              & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW);
1178         return 0;
1179 }
1180
1181 static int bcm_probe(struct platform_device *pdev)
1182 {
1183         struct bcm_device *dev;
1184         int ret;
1185
1186         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1187         if (!dev)
1188                 return -ENOMEM;
1189
1190         dev->dev = &pdev->dev;
1191         dev->irq = platform_get_irq(pdev, 0);
1192
1193         /* Initialize routing field to an unused value */
1194         dev->pcm_int_params[0] = 0xff;
1195
1196         if (has_acpi_companion(&pdev->dev)) {
1197                 ret = bcm_acpi_probe(dev);
1198                 if (ret)
1199                         return ret;
1200         }
1201
1202         ret = bcm_get_resources(dev);
1203         if (ret)
1204                 return ret;
1205
1206         platform_set_drvdata(pdev, dev);
1207
1208         dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1209
1210         /* Place this instance on the device list */
1211         mutex_lock(&bcm_device_lock);
1212         list_add_tail(&dev->list, &bcm_device_list);
1213         mutex_unlock(&bcm_device_lock);
1214
1215         ret = bcm_gpio_set_power(dev, false);
1216         if (ret)
1217                 dev_err(&pdev->dev, "Failed to power down\n");
1218
1219         return 0;
1220 }
1221
1222 static int bcm_remove(struct platform_device *pdev)
1223 {
1224         struct bcm_device *dev = platform_get_drvdata(pdev);
1225
1226         mutex_lock(&bcm_device_lock);
1227         list_del(&dev->list);
1228         mutex_unlock(&bcm_device_lock);
1229
1230         dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1231
1232         return 0;
1233 }
1234
1235 static const struct hci_uart_proto bcm_proto = {
1236         .id             = HCI_UART_BCM,
1237         .name           = "Broadcom",
1238         .manufacturer   = 15,
1239         .init_speed     = 115200,
1240         .open           = bcm_open,
1241         .close          = bcm_close,
1242         .flush          = bcm_flush,
1243         .setup          = bcm_setup,
1244         .set_baudrate   = bcm_set_baudrate,
1245         .recv           = bcm_recv,
1246         .enqueue        = bcm_enqueue,
1247         .dequeue        = bcm_dequeue,
1248 };
1249
1250 #ifdef CONFIG_ACPI
1251 static const struct acpi_device_id bcm_acpi_match[] = {
1252         { "BCM2E00" },
1253         { "BCM2E01" },
1254         { "BCM2E02" },
1255         { "BCM2E03" },
1256         { "BCM2E04" },
1257         { "BCM2E05" },
1258         { "BCM2E06" },
1259         { "BCM2E07" },
1260         { "BCM2E08" },
1261         { "BCM2E09" },
1262         { "BCM2E0A" },
1263         { "BCM2E0B" },
1264         { "BCM2E0C" },
1265         { "BCM2E0D" },
1266         { "BCM2E0E" },
1267         { "BCM2E0F" },
1268         { "BCM2E10" },
1269         { "BCM2E11" },
1270         { "BCM2E12" },
1271         { "BCM2E13" },
1272         { "BCM2E14" },
1273         { "BCM2E15" },
1274         { "BCM2E16" },
1275         { "BCM2E17" },
1276         { "BCM2E18" },
1277         { "BCM2E19" },
1278         { "BCM2E1A" },
1279         { "BCM2E1B" },
1280         { "BCM2E1C" },
1281         { "BCM2E1D" },
1282         { "BCM2E1F" },
1283         { "BCM2E20" },
1284         { "BCM2E21" },
1285         { "BCM2E22" },
1286         { "BCM2E23" },
1287         { "BCM2E24" },
1288         { "BCM2E25" },
1289         { "BCM2E26" },
1290         { "BCM2E27" },
1291         { "BCM2E28" },
1292         { "BCM2E29" },
1293         { "BCM2E2A" },
1294         { "BCM2E2B" },
1295         { "BCM2E2C" },
1296         { "BCM2E2D" },
1297         { "BCM2E2E" },
1298         { "BCM2E2F" },
1299         { "BCM2E30" },
1300         { "BCM2E31" },
1301         { "BCM2E32" },
1302         { "BCM2E33" },
1303         { "BCM2E34" },
1304         { "BCM2E35" },
1305         { "BCM2E36" },
1306         { "BCM2E37" },
1307         { "BCM2E38" },
1308         { "BCM2E39" },
1309         { "BCM2E3A" },
1310         { "BCM2E3B" },
1311         { "BCM2E3C" },
1312         { "BCM2E3D" },
1313         { "BCM2E3E" },
1314         { "BCM2E3F" },
1315         { "BCM2E40" },
1316         { "BCM2E41" },
1317         { "BCM2E42" },
1318         { "BCM2E43" },
1319         { "BCM2E44" },
1320         { "BCM2E45" },
1321         { "BCM2E46" },
1322         { "BCM2E47" },
1323         { "BCM2E48" },
1324         { "BCM2E49" },
1325         { "BCM2E4A" },
1326         { "BCM2E4B" },
1327         { "BCM2E4C" },
1328         { "BCM2E4D" },
1329         { "BCM2E4E" },
1330         { "BCM2E4F" },
1331         { "BCM2E50" },
1332         { "BCM2E51" },
1333         { "BCM2E52" },
1334         { "BCM2E53" },
1335         { "BCM2E54" },
1336         { "BCM2E55" },
1337         { "BCM2E56" },
1338         { "BCM2E57" },
1339         { "BCM2E58" },
1340         { "BCM2E59" },
1341         { "BCM2E5A" },
1342         { "BCM2E5B" },
1343         { "BCM2E5C" },
1344         { "BCM2E5D" },
1345         { "BCM2E5E" },
1346         { "BCM2E5F" },
1347         { "BCM2E60" },
1348         { "BCM2E61" },
1349         { "BCM2E62" },
1350         { "BCM2E63" },
1351         { "BCM2E64" },
1352         { "BCM2E65" },
1353         { "BCM2E66" },
1354         { "BCM2E67" },
1355         { "BCM2E68" },
1356         { "BCM2E69" },
1357         { "BCM2E6B" },
1358         { "BCM2E6D" },
1359         { "BCM2E6E" },
1360         { "BCM2E6F" },
1361         { "BCM2E70" },
1362         { "BCM2E71" },
1363         { "BCM2E72" },
1364         { "BCM2E73" },
1365         { "BCM2E74" },
1366         { "BCM2E75" },
1367         { "BCM2E76" },
1368         { "BCM2E77" },
1369         { "BCM2E78" },
1370         { "BCM2E79" },
1371         { "BCM2E7A" },
1372         { "BCM2E7B" },
1373         { "BCM2E7C" },
1374         { "BCM2E7D" },
1375         { "BCM2E7E" },
1376         { "BCM2E7F" },
1377         { "BCM2E80" },
1378         { "BCM2E81" },
1379         { "BCM2E82" },
1380         { "BCM2E83" },
1381         { "BCM2E84" },
1382         { "BCM2E85" },
1383         { "BCM2E86" },
1384         { "BCM2E87" },
1385         { "BCM2E88" },
1386         { "BCM2E89" },
1387         { "BCM2E8A" },
1388         { "BCM2E8B" },
1389         { "BCM2E8C" },
1390         { "BCM2E8D" },
1391         { "BCM2E8E" },
1392         { "BCM2E90" },
1393         { "BCM2E92" },
1394         { "BCM2E93" },
1395         { "BCM2E94" },
1396         { "BCM2E95" },
1397         { "BCM2E96" },
1398         { "BCM2E97" },
1399         { "BCM2E98" },
1400         { "BCM2E99" },
1401         { "BCM2E9A" },
1402         { "BCM2E9B" },
1403         { "BCM2E9C" },
1404         { "BCM2E9D" },
1405         { "BCM2EA0" },
1406         { "BCM2EA1" },
1407         { "BCM2EA2" },
1408         { "BCM2EA3" },
1409         { "BCM2EA4" },
1410         { "BCM2EA5" },
1411         { "BCM2EA6" },
1412         { "BCM2EA7" },
1413         { "BCM2EA8" },
1414         { "BCM2EA9" },
1415         { "BCM2EAA" },
1416         { "BCM2EAB" },
1417         { "BCM2EAC" },
1418         { },
1419 };
1420 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1421 #endif
1422
1423 /* suspend and resume callbacks */
1424 static const struct dev_pm_ops bcm_pm_ops = {
1425         SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1426         SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1427 };
1428
1429 static struct platform_driver bcm_driver = {
1430         .probe = bcm_probe,
1431         .remove = bcm_remove,
1432         .driver = {
1433                 .name = "hci_bcm",
1434                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1435                 .pm = &bcm_pm_ops,
1436         },
1437 };
1438
1439 static int bcm_serdev_probe(struct serdev_device *serdev)
1440 {
1441         struct bcm_device *bcmdev;
1442         const struct bcm_device_data *data;
1443         int err;
1444
1445         bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1446         if (!bcmdev)
1447                 return -ENOMEM;
1448
1449         bcmdev->dev = &serdev->dev;
1450 #ifdef CONFIG_PM
1451         bcmdev->hu = &bcmdev->serdev_hu;
1452 #endif
1453         bcmdev->serdev_hu.serdev = serdev;
1454         serdev_device_set_drvdata(serdev, bcmdev);
1455
1456         /* Initialize routing field to an unused value */
1457         bcmdev->pcm_int_params[0] = 0xff;
1458
1459         if (has_acpi_companion(&serdev->dev))
1460                 err = bcm_acpi_probe(bcmdev);
1461         else
1462                 err = bcm_of_probe(bcmdev);
1463         if (err)
1464                 return err;
1465
1466         err = bcm_get_resources(bcmdev);
1467         if (err)
1468                 return err;
1469
1470         if (!bcmdev->shutdown) {
1471                 dev_warn(&serdev->dev,
1472                          "No reset resource, using default baud rate\n");
1473                 bcmdev->oper_speed = bcmdev->init_speed;
1474         }
1475
1476         err = bcm_gpio_set_power(bcmdev, false);
1477         if (err)
1478                 dev_err(&serdev->dev, "Failed to power down\n");
1479
1480         data = device_get_match_data(bcmdev->dev);
1481         if (data) {
1482                 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
1483                 bcmdev->drive_rts_on_open = data->drive_rts_on_open;
1484         }
1485
1486         return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1487 }
1488
1489 static void bcm_serdev_remove(struct serdev_device *serdev)
1490 {
1491         struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1492
1493         hci_uart_unregister_device(&bcmdev->serdev_hu);
1494 }
1495
1496 #ifdef CONFIG_OF
1497 static struct bcm_device_data bcm4354_device_data = {
1498         .no_early_set_baudrate = true,
1499 };
1500
1501 static struct bcm_device_data bcm43438_device_data = {
1502         .drive_rts_on_open = true,
1503 };
1504
1505 static const struct of_device_id bcm_bluetooth_of_match[] = {
1506         { .compatible = "brcm,bcm20702a1" },
1507         { .compatible = "brcm,bcm4329-bt" },
1508         { .compatible = "brcm,bcm4330-bt" },
1509         { .compatible = "brcm,bcm4334-bt" },
1510         { .compatible = "brcm,bcm4345c5" },
1511         { .compatible = "brcm,bcm4330-bt" },
1512         { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
1513         { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
1514         { .compatible = "brcm,bcm4335a0" },
1515         { },
1516 };
1517 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1518 #endif
1519
1520 static struct serdev_device_driver bcm_serdev_driver = {
1521         .probe = bcm_serdev_probe,
1522         .remove = bcm_serdev_remove,
1523         .driver = {
1524                 .name = "hci_uart_bcm",
1525                 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1526                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1527                 .pm = &bcm_pm_ops,
1528         },
1529 };
1530
1531 int __init bcm_init(void)
1532 {
1533         /* For now, we need to keep both platform device
1534          * driver (ACPI generated) and serdev driver (DT).
1535          */
1536         platform_driver_register(&bcm_driver);
1537         serdev_device_driver_register(&bcm_serdev_driver);
1538
1539         return hci_uart_register_proto(&bcm_proto);
1540 }
1541
1542 int __exit bcm_deinit(void)
1543 {
1544         platform_driver_unregister(&bcm_driver);
1545         serdev_device_driver_unregister(&bcm_serdev_driver);
1546
1547         return hci_uart_unregister_proto(&bcm_proto);
1548 }