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  * @set_device_wakeup: callback to toggle BT_WAKE pin
  72  *      either by accessing @device_wakeup or by calling @btlp
  73  * @set_shutdown: callback to toggle BT_REG_ON pin
  74  *      either by accessing @shutdown or by calling @btpu/@btpd
  75  * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
  76  * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
  77  * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
  78  * @txco_clk: external reference frequency clock used by Bluetooth device
  79  * @lpo_clk: external LPO clock used by Bluetooth device
  80  * @supplies: VBAT and VDDIO supplies used by Bluetooth device
  81  * @res_enabled: whether clocks and supplies are prepared and enabled
  82  * @init_speed: default baudrate of Bluetooth device;
  83  *      the host UART is initially set to this baudrate so that
  84  *      it can configure the Bluetooth device for @oper_speed
  85  * @oper_speed: preferred baudrate of Bluetooth device;
  86  *      set to 0 if @init_speed is already the preferred baudrate
  87  * @irq: interrupt triggered by HOST_WAKE_BT pin
  88  * @irq_active_low: whether @irq is active low
  89  * @hu: pointer to HCI UART controller struct,
  90  *      used to disable flow control during runtime suspend and system sleep
  91  * @is_suspended: whether flow control is currently disabled
  92  * @no_early_set_baudrate: don't set_baudrate before setup()
  93  */
  94 struct bcm_device {
  95         /* Must be the first member, hci_serdev.c expects this. */
  96         struct hci_uart         serdev_hu;
  97         struct list_head        list;
  98
  99         struct device           *dev;
 100
 101         const char              *name;
 102         struct gpio_desc        *device_wakeup;
 103         struct gpio_desc        *shutdown;
 104         int                     (*set_device_wakeup)(struct bcm_device *, bool);
 105         int                     (*set_shutdown)(struct bcm_device *, bool);
 106 #ifdef CONFIG_ACPI
 107         acpi_handle             btlp, btpu, btpd;
 108         int                     gpio_count;
 109         int                     gpio_int_idx;
 110 #endif
 111
 112         struct clk              *txco_clk;
 113         struct clk              *lpo_clk;
 114         struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
 115         bool                    res_enabled;
 116
 117         u32                     init_speed;
 118         u32                     oper_speed;
 119         int                     irq;
 120         bool                    irq_active_low;
 121
 122 #ifdef CONFIG_PM
 123         struct hci_uart         *hu;
 124         bool                    is_suspended;
 125 #endif
 126         bool                    no_early_set_baudrate;
 127         bool                    drive_rts_on_open;
 128         u8                      pcm_int_params[5];
 129 };
 130
 131 /* generic bcm uart resources */
 132 struct bcm_data {
 133         struct sk_buff          *rx_skb;
 134         struct sk_buff_head     txq;
 135
 136         struct bcm_device       *dev;
 137 };
 138
 139 /* List of BCM BT UART devices */
 140 static DEFINE_MUTEX(bcm_device_lock);
 141 static LIST_HEAD(bcm_device_list);
 142
 143 static int irq_polarity = -1;
 144 module_param(irq_polarity, int, 0444);
 145 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
 146
 147 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
 148 {
 149         if (hu->serdev)
 150                 serdev_device_set_baudrate(hu->serdev, speed);
 151         else
 152                 hci_uart_set_baudrate(hu, speed);
 153 }
 154
 155 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
 156 {
 157         struct hci_dev *hdev = hu->hdev;
 158         struct sk_buff *skb;
 159         struct bcm_update_uart_baud_rate param;
 160
 161         if (speed > 3000000) {
 162                 struct bcm_write_uart_clock_setting clock;
 163
 164                 clock.type = BCM_UART_CLOCK_48MHZ;
 165
 166                 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
 167
 168                 /* This Broadcom specific command changes the UART's controller
 169                  * clock for baud rate > 3000000.
 170                  */
 171                 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
 172                 if (IS_ERR(skb)) {
 173                         int err = PTR_ERR(skb);
 174                         bt_dev_err(hdev, "BCM: failed to write clock (%d)",
 175                                    err);
 176                         return err;
 177                 }
 178
 179                 kfree_skb(skb);
 180         }
 181
 182         bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
 183
 184         param.zero = cpu_to_le16(0);
 185         param.baud_rate = cpu_to_le32(speed);
 186
 187         /* This Broadcom specific command changes the UART's controller baud
 188          * rate.
 189          */
 190         skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
 191                              HCI_INIT_TIMEOUT);
 192         if (IS_ERR(skb)) {
 193                 int err = PTR_ERR(skb);
 194                 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
 195                            err);
 196                 return err;
 197         }
 198
 199         kfree_skb(skb);
 200
 201         return 0;
 202 }
 203
 204 /* bcm_device_exists should be protected by bcm_device_lock */
 205 static bool bcm_device_exists(struct bcm_device *device)
 206 {
 207         struct list_head *p;
 208
 209 #ifdef CONFIG_PM
 210         /* Devices using serdev always exist */
 211         if (device && device->hu && device->hu->serdev)
 212                 return true;
 213 #endif
 214
 215         list_for_each(p, &bcm_device_list) {
 216                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 217
 218                 if (device == dev)
 219                         return true;
 220         }
 221
 222         return false;
 223 }
 224
 225 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 226 {
 227         int err;
 228
 229         if (powered && !dev->res_enabled) {
 230                 /* Intel Macs use bcm_apple_get_resources() and don't
 231                  * have regulator supplies configured.
 232                  */
 233                 if (dev->supplies[0].supply) {
 234                         err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
 235                                                     dev->supplies);
 236                         if (err)
 237                                 return err;
 238                 }
 239
 240                 /* LPO clock needs to be 32.768 kHz */
 241                 err = clk_set_rate(dev->lpo_clk, 32768);
 242                 if (err) {
 243                         dev_err(dev->dev, "Could not set LPO clock rate\n");
 244                         goto err_regulator_disable;
 245                 }
 246
 247                 err = clk_prepare_enable(dev->lpo_clk);
 248                 if (err)
 249                         goto err_regulator_disable;
 250
 251                 err = clk_prepare_enable(dev->txco_clk);
 252                 if (err)
 253                         goto err_lpo_clk_disable;
 254         }
 255
 256         err = dev->set_shutdown(dev, powered);
 257         if (err)
 258                 goto err_txco_clk_disable;
 259
 260         err = dev->set_device_wakeup(dev, powered);
 261         if (err)
 262                 goto err_revert_shutdown;
 263
 264         if (!powered && dev->res_enabled) {
 265                 clk_disable_unprepare(dev->txco_clk);
 266                 clk_disable_unprepare(dev->lpo_clk);
 267
 268                 /* Intel Macs use bcm_apple_get_resources() and don't
 269                  * have regulator supplies configured.
 270                  */
 271                 if (dev->supplies[0].supply)
 272                         regulator_bulk_disable(BCM_NUM_SUPPLIES,
 273                                                dev->supplies);
 274         }
 275
 276         /* wait for device to power on and come out of reset */
 277         usleep_range(100000, 120000);
 278
 279         dev->res_enabled = powered;
 280
 281         return 0;
 282
 283 err_revert_shutdown:
 284         dev->set_shutdown(dev, !powered);
 285 err_txco_clk_disable:
 286         if (powered && !dev->res_enabled)
 287                 clk_disable_unprepare(dev->txco_clk);
 288 err_lpo_clk_disable:
 289         if (powered && !dev->res_enabled)
 290                 clk_disable_unprepare(dev->lpo_clk);
 291 err_regulator_disable:
 292         if (powered && !dev->res_enabled)
 293                 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
 294         return err;
 295 }
 296
 297 #ifdef CONFIG_PM
 298 static irqreturn_t bcm_host_wake(int irq, void *data)
 299 {
 300         struct bcm_device *bdev = data;
 301
 302         bt_dev_dbg(bdev, "Host wake IRQ");
 303
 304         pm_runtime_get(bdev->dev);
 305         pm_runtime_mark_last_busy(bdev->dev);
 306         pm_runtime_put_autosuspend(bdev->dev);
 307
 308         return IRQ_HANDLED;
 309 }
 310
 311 static int bcm_request_irq(struct bcm_data *bcm)
 312 {
 313         struct bcm_device *bdev = bcm->dev;
 314         int err;
 315
 316         mutex_lock(&bcm_device_lock);
 317         if (!bcm_device_exists(bdev)) {
 318                 err = -ENODEV;
 319                 goto unlock;
 320         }
 321
 322         if (bdev->irq <= 0) {
 323                 err = -EOPNOTSUPP;
 324                 goto unlock;
 325         }
 326
 327         err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
 328                                bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
 329                                                       IRQF_TRIGGER_RISING,
 330                                "host_wake", bdev);
 331         if (err) {
 332                 bdev->irq = err;
 333                 goto unlock;
 334         }
 335
 336         device_init_wakeup(bdev->dev, true);
 337
 338         pm_runtime_set_autosuspend_delay(bdev->dev,
 339                                          BCM_AUTOSUSPEND_DELAY);
 340         pm_runtime_use_autosuspend(bdev->dev);
 341         pm_runtime_set_active(bdev->dev);
 342         pm_runtime_enable(bdev->dev);
 343
 344 unlock:
 345         mutex_unlock(&bcm_device_lock);
 346
 347         return err;
 348 }
 349
 350 static const struct bcm_set_sleep_mode default_sleep_params = {
 351         .sleep_mode = 1,        /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
 352         .idle_host = 2,         /* idle threshold HOST, in 300ms */
 353         .idle_dev = 2,          /* idle threshold device, in 300ms */
 354         .bt_wake_active = 1,    /* BT_WAKE active mode: 1 = high, 0 = low */
 355         .host_wake_active = 0,  /* HOST_WAKE active mode: 1 = high, 0 = low */
 356         .allow_host_sleep = 1,  /* Allow host sleep in SCO flag */
 357         .combine_modes = 1,     /* Combine sleep and LPM flag */
 358         .tristate_control = 0,  /* Allow tri-state control of UART tx flag */
 359         /* Irrelevant USB flags */
 360         .usb_auto_sleep = 0,
 361         .usb_resume_timeout = 0,
 362         .break_to_host = 0,
 363         .pulsed_host_wake = 1,
 364 };
 365
 366 static int bcm_setup_sleep(struct hci_uart *hu)
 367 {
 368         struct bcm_data *bcm = hu->priv;
 369         struct sk_buff *skb;
 370         struct bcm_set_sleep_mode sleep_params = default_sleep_params;
 371
 372         sleep_params.host_wake_active = !bcm->dev->irq_active_low;
 373
 374         skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
 375                              &sleep_params, HCI_INIT_TIMEOUT);
 376         if (IS_ERR(skb)) {
 377                 int err = PTR_ERR(skb);
 378                 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
 379                 return err;
 380         }
 381         kfree_skb(skb);
 382
 383         bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
 384
 385         return 0;
 386 }
 387 #else
 388 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
 389 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
 390 #endif
 391
 392 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
 393 {
 394         struct hci_uart *hu = hci_get_drvdata(hdev);
 395         struct bcm_data *bcm = hu->priv;
 396         struct sk_buff *skb;
 397
 398         if (!test_bit(HCI_RUNNING, &hdev->flags))
 399                 return -ENETDOWN;
 400
 401         skb = bt_skb_alloc(3, GFP_KERNEL);
 402         if (!skb)
 403                 return -ENOMEM;
 404
 405         skb_put_u8(skb, BCM_LM_DIAG_PKT);
 406         skb_put_u8(skb, 0xf0);
 407         skb_put_u8(skb, enable);
 408
 409         skb_queue_tail(&bcm->txq, skb);
 410         hci_uart_tx_wakeup(hu);
 411
 412         return 0;
 413 }
 414
 415 static int bcm_open(struct hci_uart *hu)
 416 {
 417         struct bcm_data *bcm;
 418         struct list_head *p;
 419         int err;
 420
 421         bt_dev_dbg(hu->hdev, "hu %p", hu);
 422
 423         if (!hci_uart_has_flow_control(hu))
 424                 return -EOPNOTSUPP;
 425
 426         bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
 427         if (!bcm)
 428                 return -ENOMEM;
 429
 430         skb_queue_head_init(&bcm->txq);
 431
 432         hu->priv = bcm;
 433
 434         mutex_lock(&bcm_device_lock);
 435
 436         if (hu->serdev) {
 437                 bcm->dev = serdev_device_get_drvdata(hu->serdev);
 438                 goto out;
 439         }
 440
 441         if (!hu->tty->dev)
 442                 goto out;
 443
 444         list_for_each(p, &bcm_device_list) {
 445                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 446
 447                 /* Retrieve saved bcm_device based on parent of the
 448                  * platform device (saved during device probe) and
 449                  * parent of tty device used by hci_uart
 450                  */
 451                 if (hu->tty->dev->parent == dev->dev->parent) {
 452                         bcm->dev = dev;
 453 #ifdef CONFIG_PM
 454                         dev->hu = hu;
 455 #endif
 456                         break;
 457                 }
 458         }
 459
 460 out:
 461         if (bcm->dev) {
 462                 if (bcm->dev->drive_rts_on_open)
 463                         hci_uart_set_flow_control(hu, true);
 464
 465                 hu->init_speed = bcm->dev->init_speed;
 466
 467                 /* If oper_speed is set, ldisc/serdev will set the baudrate
 468                  * before calling setup()
 469                  */
 470                 if (!bcm->dev->no_early_set_baudrate)
 471                         hu->oper_speed = bcm->dev->oper_speed;
 472
 473                 err = bcm_gpio_set_power(bcm->dev, true);
 474
 475                 if (bcm->dev->drive_rts_on_open)
 476                         hci_uart_set_flow_control(hu, false);
 477
 478                 if (err)
 479                         goto err_unset_hu;
 480         }
 481
 482         mutex_unlock(&bcm_device_lock);
 483         return 0;
 484
 485 err_unset_hu:
 486 #ifdef CONFIG_PM
 487         if (!hu->serdev)
 488                 bcm->dev->hu = NULL;
 489 #endif
 490         mutex_unlock(&bcm_device_lock);
 491         hu->priv = NULL;
 492         kfree(bcm);
 493         return err;
 494 }
 495
 496 static int bcm_close(struct hci_uart *hu)
 497 {
 498         struct bcm_data *bcm = hu->priv;
 499         struct bcm_device *bdev = NULL;
 500         int err;
 501
 502         bt_dev_dbg(hu->hdev, "hu %p", hu);
 503
 504         /* Protect bcm->dev against removal of the device or driver */
 505         mutex_lock(&bcm_device_lock);
 506
 507         if (hu->serdev) {
 508                 bdev = serdev_device_get_drvdata(hu->serdev);
 509         } else if (bcm_device_exists(bcm->dev)) {
 510                 bdev = bcm->dev;
 511 #ifdef CONFIG_PM
 512                 bdev->hu = NULL;
 513 #endif
 514         }
 515
 516         if (bdev) {
 517                 if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
 518                         devm_free_irq(bdev->dev, bdev->irq, bdev);
 519                         device_init_wakeup(bdev->dev, false);
 520                         pm_runtime_disable(bdev->dev);
 521                 }
 522
 523                 err = bcm_gpio_set_power(bdev, false);
 524                 if (err)
 525                         bt_dev_err(hu->hdev, "Failed to power down");
 526                 else
 527                         pm_runtime_set_suspended(bdev->dev);
 528         }
 529         mutex_unlock(&bcm_device_lock);
 530
 531         skb_queue_purge(&bcm->txq);
 532         kfree_skb(bcm->rx_skb);
 533         kfree(bcm);
 534
 535         hu->priv = NULL;
 536         return 0;
 537 }
 538
 539 static int bcm_flush(struct hci_uart *hu)
 540 {
 541         struct bcm_data *bcm = hu->priv;
 542
 543         bt_dev_dbg(hu->hdev, "hu %p", hu);
 544
 545         skb_queue_purge(&bcm->txq);
 546
 547         return 0;
 548 }
 549
 550 static int bcm_setup(struct hci_uart *hu)
 551 {
 552         struct bcm_data *bcm = hu->priv;
 553         char fw_name[64];
 554         const struct firmware *fw;
 555         unsigned int speed;
 556         int err;
 557
 558         bt_dev_dbg(hu->hdev, "hu %p", hu);
 559
 560         hu->hdev->set_diag = bcm_set_diag;
 561         hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 562
 563         err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false);
 564         if (err)
 565                 return err;
 566
 567         err = request_firmware(&fw, fw_name, &hu->hdev->dev);
 568         if (err < 0) {
 569                 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
 570                 return 0;
 571         }
 572
 573         err = btbcm_patchram(hu->hdev, fw);
 574         if (err) {
 575                 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
 576                 goto finalize;
 577         }
 578
 579         /* Init speed if any */
 580         if (hu->init_speed)
 581                 speed = hu->init_speed;
 582         else if (hu->proto->init_speed)
 583                 speed = hu->proto->init_speed;
 584         else
 585                 speed = 0;
 586
 587         if (speed)
 588                 host_set_baudrate(hu, speed);
 589
 590         /* Operational speed if any */
 591         if (hu->oper_speed)
 592                 speed = hu->oper_speed;
 593         else if (bcm->dev && bcm->dev->oper_speed)
 594                 speed = bcm->dev->oper_speed;
 595         else if (hu->proto->oper_speed)
 596                 speed = hu->proto->oper_speed;
 597         else
 598                 speed = 0;
 599
 600         if (speed) {
 601                 err = bcm_set_baudrate(hu, speed);
 602                 if (!err)
 603                         host_set_baudrate(hu, speed);
 604         }
 605
 606         /* PCM parameters if provided */
 607         if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
 608                 struct bcm_set_pcm_int_params params;
 609
 610                 btbcm_read_pcm_int_params(hu->hdev, &params);
 611
 612                 memcpy(&params, bcm->dev->pcm_int_params, 5);
 613                 btbcm_write_pcm_int_params(hu->hdev, &params);
 614         }
 615
 616 finalize:
 617         release_firmware(fw);
 618
 619         err = btbcm_finalize(hu->hdev);
 620         if (err)
 621                 return err;
 622
 623         if (!bcm_request_irq(bcm))
 624                 err = bcm_setup_sleep(hu);
 625
 626         return err;
 627 }
 628
 629 #define BCM_RECV_LM_DIAG \
 630         .type = BCM_LM_DIAG_PKT, \
 631         .hlen = BCM_LM_DIAG_SIZE, \
 632         .loff = 0, \
 633         .lsize = 0, \
 634         .maxlen = BCM_LM_DIAG_SIZE
 635
 636 #define BCM_RECV_NULL \
 637         .type = BCM_NULL_PKT, \
 638         .hlen = BCM_NULL_SIZE, \
 639         .loff = 0, \
 640         .lsize = 0, \
 641         .maxlen = BCM_NULL_SIZE
 642
 643 #define BCM_RECV_TYPE49 \
 644         .type = BCM_TYPE49_PKT, \
 645         .hlen = BCM_TYPE49_SIZE, \
 646         .loff = 0, \
 647         .lsize = 0, \
 648         .maxlen = BCM_TYPE49_SIZE
 649
 650 #define BCM_RECV_TYPE52 \
 651         .type = BCM_TYPE52_PKT, \
 652         .hlen = BCM_TYPE52_SIZE, \
 653         .loff = 0, \
 654         .lsize = 0, \
 655         .maxlen = BCM_TYPE52_SIZE
 656
 657 static const struct h4_recv_pkt bcm_recv_pkts[] = {
 658         { H4_RECV_ACL,      .recv = hci_recv_frame },
 659         { H4_RECV_SCO,      .recv = hci_recv_frame },
 660         { H4_RECV_EVENT,    .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         return 0;
 992 }
 993
 994 /* Try a bunch of names for TXCO */
 995 static struct clk *bcm_get_txco(struct device *dev)
 996 {
 997         struct clk *clk;
 998
 999         /* New explicit name */
1000         clk = devm_clk_get(dev, "txco");
1001         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1002                 return clk;
1003
1004         /* Deprecated name */
1005         clk = devm_clk_get(dev, "extclk");
1006         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1007                 return clk;
1008
1009         /* Original code used no name at all */
1010         return devm_clk_get(dev, NULL);
1011 }
1012
1013 static int bcm_get_resources(struct bcm_device *dev)
1014 {
1015         const struct dmi_system_id *dmi_id;
1016         int err;
1017
1018         dev->name = dev_name(dev->dev);
1019
1020         if (x86_apple_machine && !bcm_apple_get_resources(dev))
1021                 return 0;
1022
1023         dev->txco_clk = bcm_get_txco(dev->dev);
1024
1025         /* Handle deferred probing */
1026         if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1027                 return PTR_ERR(dev->txco_clk);
1028
1029         /* Ignore all other errors as before */
1030         if (IS_ERR(dev->txco_clk))
1031                 dev->txco_clk = NULL;
1032
1033         dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1034         if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1035                 return PTR_ERR(dev->lpo_clk);
1036
1037         if (IS_ERR(dev->lpo_clk))
1038                 dev->lpo_clk = NULL;
1039
1040         /* Check if we accidentally fetched the lpo clock twice */
1041         if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1042                 devm_clk_put(dev->dev, dev->txco_clk);
1043                 dev->txco_clk = NULL;
1044         }
1045
1046         dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1047                                                      GPIOD_OUT_LOW);
1048         if (IS_ERR(dev->device_wakeup))
1049                 return PTR_ERR(dev->device_wakeup);
1050
1051         dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1052                                                 GPIOD_OUT_LOW);
1053         if (IS_ERR(dev->shutdown))
1054                 return PTR_ERR(dev->shutdown);
1055
1056         dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1057         dev->set_shutdown = bcm_gpio_set_shutdown;
1058
1059         dev->supplies[0].supply = "vbat";
1060         dev->supplies[1].supply = "vddio";
1061         err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1062                                       dev->supplies);
1063         if (err)
1064                 return err;
1065
1066         /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1067         if (dev->irq <= 0) {
1068                 struct gpio_desc *gpio;
1069
1070                 gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
1071                                                GPIOD_IN);
1072                 if (IS_ERR(gpio))
1073                         return PTR_ERR(gpio);
1074
1075                 dev->irq = gpiod_to_irq(gpio);
1076         }
1077
1078         dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1079         if (dmi_id) {
1080                 dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1081                          dmi_id->ident);
1082                 dev->irq = 0;
1083         }
1084
1085         dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1086         return 0;
1087 }
1088
1089 #ifdef CONFIG_ACPI
1090 static int bcm_acpi_probe(struct bcm_device *dev)
1091 {
1092         LIST_HEAD(resources);
1093         const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1094         struct resource_entry *entry;
1095         int ret;
1096
1097         /* Retrieve UART ACPI info */
1098         dev->gpio_int_idx = -1;
1099         ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1100                                      &resources, bcm_resource, dev);
1101         if (ret < 0)
1102                 return ret;
1103
1104         resource_list_for_each_entry(entry, &resources) {
1105                 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1106                         dev->irq = entry->res->start;
1107                         break;
1108                 }
1109         }
1110         acpi_dev_free_resource_list(&resources);
1111
1112         /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1113          * only 2 GPIO resources, we use the irq-last mapping for this, since
1114          * we already have an irq the 3th / last mapping will not be used.
1115          */
1116         if (dev->irq)
1117                 gpio_mapping = acpi_bcm_int_last_gpios;
1118         else if (dev->gpio_int_idx == 0)
1119                 gpio_mapping = acpi_bcm_int_first_gpios;
1120         else if (dev->gpio_int_idx == 2)
1121                 gpio_mapping = acpi_bcm_int_last_gpios;
1122         else
1123                 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1124                          dev->gpio_int_idx);
1125
1126         /* Warn if our expectations are not met. */
1127         if (dev->gpio_count != (dev->irq ? 2 : 3))
1128                 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1129                          dev->gpio_count);
1130
1131         ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1132         if (ret)
1133                 return ret;
1134
1135         if (irq_polarity != -1) {
1136                 dev->irq_active_low = irq_polarity;
1137                 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1138                          dev->irq_active_low ? "low" : "high");
1139         }
1140
1141         return 0;
1142 }
1143 #else
1144 static int bcm_acpi_probe(struct bcm_device *dev)
1145 {
1146         return -EINVAL;
1147 }
1148 #endif /* CONFIG_ACPI */
1149
1150 static int bcm_of_probe(struct bcm_device *bdev)
1151 {
1152         device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1153         device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
1154                                       bdev->pcm_int_params, 5);
1155         bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup");
1156
1157         return 0;
1158 }
1159
1160 static int bcm_probe(struct platform_device *pdev)
1161 {
1162         struct bcm_device *dev;
1163         int ret;
1164
1165         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1166         if (!dev)
1167                 return -ENOMEM;
1168
1169         dev->dev = &pdev->dev;
1170         dev->irq = platform_get_irq(pdev, 0);
1171
1172         /* Initialize routing field to an unused value */
1173         dev->pcm_int_params[0] = 0xff;
1174
1175         if (has_acpi_companion(&pdev->dev)) {
1176                 ret = bcm_acpi_probe(dev);
1177                 if (ret)
1178                         return ret;
1179         }
1180
1181         ret = bcm_get_resources(dev);
1182         if (ret)
1183                 return ret;
1184
1185         platform_set_drvdata(pdev, dev);
1186
1187         dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1188
1189         /* Place this instance on the device list */
1190         mutex_lock(&bcm_device_lock);
1191         list_add_tail(&dev->list, &bcm_device_list);
1192         mutex_unlock(&bcm_device_lock);
1193
1194         ret = bcm_gpio_set_power(dev, false);
1195         if (ret)
1196                 dev_err(&pdev->dev, "Failed to power down\n");
1197
1198         return 0;
1199 }
1200
1201 static int bcm_remove(struct platform_device *pdev)
1202 {
1203         struct bcm_device *dev = platform_get_drvdata(pdev);
1204
1205         mutex_lock(&bcm_device_lock);
1206         list_del(&dev->list);
1207         mutex_unlock(&bcm_device_lock);
1208
1209         dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1210
1211         return 0;
1212 }
1213
1214 static const struct hci_uart_proto bcm_proto = {
1215         .id             = HCI_UART_BCM,
1216         .name           = "Broadcom",
1217         .manufacturer   = 15,
1218         .init_speed     = 115200,
1219         .open           = bcm_open,
1220         .close          = bcm_close,
1221         .flush          = bcm_flush,
1222         .setup          = bcm_setup,
1223         .set_baudrate   = bcm_set_baudrate,
1224         .recv           = bcm_recv,
1225         .enqueue        = bcm_enqueue,
1226         .dequeue        = bcm_dequeue,
1227 };
1228
1229 #ifdef CONFIG_ACPI
1230 static const struct acpi_device_id bcm_acpi_match[] = {
1231         { "BCM2E00" },
1232         { "BCM2E01" },
1233         { "BCM2E02" },
1234         { "BCM2E03" },
1235         { "BCM2E04" },
1236         { "BCM2E05" },
1237         { "BCM2E06" },
1238         { "BCM2E07" },
1239         { "BCM2E08" },
1240         { "BCM2E09" },
1241         { "BCM2E0A" },
1242         { "BCM2E0B" },
1243         { "BCM2E0C" },
1244         { "BCM2E0D" },
1245         { "BCM2E0E" },
1246         { "BCM2E0F" },
1247         { "BCM2E10" },
1248         { "BCM2E11" },
1249         { "BCM2E12" },
1250         { "BCM2E13" },
1251         { "BCM2E14" },
1252         { "BCM2E15" },
1253         { "BCM2E16" },
1254         { "BCM2E17" },
1255         { "BCM2E18" },
1256         { "BCM2E19" },
1257         { "BCM2E1A" },
1258         { "BCM2E1B" },
1259         { "BCM2E1C" },
1260         { "BCM2E1D" },
1261         { "BCM2E1F" },
1262         { "BCM2E20" },
1263         { "BCM2E21" },
1264         { "BCM2E22" },
1265         { "BCM2E23" },
1266         { "BCM2E24" },
1267         { "BCM2E25" },
1268         { "BCM2E26" },
1269         { "BCM2E27" },
1270         { "BCM2E28" },
1271         { "BCM2E29" },
1272         { "BCM2E2A" },
1273         { "BCM2E2B" },
1274         { "BCM2E2C" },
1275         { "BCM2E2D" },
1276         { "BCM2E2E" },
1277         { "BCM2E2F" },
1278         { "BCM2E30" },
1279         { "BCM2E31" },
1280         { "BCM2E32" },
1281         { "BCM2E33" },
1282         { "BCM2E34" },
1283         { "BCM2E35" },
1284         { "BCM2E36" },
1285         { "BCM2E37" },
1286         { "BCM2E38" },
1287         { "BCM2E39" },
1288         { "BCM2E3A" },
1289         { "BCM2E3B" },
1290         { "BCM2E3C" },
1291         { "BCM2E3D" },
1292         { "BCM2E3E" },
1293         { "BCM2E3F" },
1294         { "BCM2E40" },
1295         { "BCM2E41" },
1296         { "BCM2E42" },
1297         { "BCM2E43" },
1298         { "BCM2E44" },
1299         { "BCM2E45" },
1300         { "BCM2E46" },
1301         { "BCM2E47" },
1302         { "BCM2E48" },
1303         { "BCM2E49" },
1304         { "BCM2E4A" },
1305         { "BCM2E4B" },
1306         { "BCM2E4C" },
1307         { "BCM2E4D" },
1308         { "BCM2E4E" },
1309         { "BCM2E4F" },
1310         { "BCM2E50" },
1311         { "BCM2E51" },
1312         { "BCM2E52" },
1313         { "BCM2E53" },
1314         { "BCM2E54" },
1315         { "BCM2E55" },
1316         { "BCM2E56" },
1317         { "BCM2E57" },
1318         { "BCM2E58" },
1319         { "BCM2E59" },
1320         { "BCM2E5A" },
1321         { "BCM2E5B" },
1322         { "BCM2E5C" },
1323         { "BCM2E5D" },
1324         { "BCM2E5E" },
1325         { "BCM2E5F" },
1326         { "BCM2E60" },
1327         { "BCM2E61" },
1328         { "BCM2E62" },
1329         { "BCM2E63" },
1330         { "BCM2E64" },
1331         { "BCM2E65" },
1332         { "BCM2E66" },
1333         { "BCM2E67" },
1334         { "BCM2E68" },
1335         { "BCM2E69" },
1336         { "BCM2E6B" },
1337         { "BCM2E6D" },
1338         { "BCM2E6E" },
1339         { "BCM2E6F" },
1340         { "BCM2E70" },
1341         { "BCM2E71" },
1342         { "BCM2E72" },
1343         { "BCM2E73" },
1344         { "BCM2E74" },
1345         { "BCM2E75" },
1346         { "BCM2E76" },
1347         { "BCM2E77" },
1348         { "BCM2E78" },
1349         { "BCM2E79" },
1350         { "BCM2E7A" },
1351         { "BCM2E7B" },
1352         { "BCM2E7C" },
1353         { "BCM2E7D" },
1354         { "BCM2E7E" },
1355         { "BCM2E7F" },
1356         { "BCM2E80" },
1357         { "BCM2E81" },
1358         { "BCM2E82" },
1359         { "BCM2E83" },
1360         { "BCM2E84" },
1361         { "BCM2E85" },
1362         { "BCM2E86" },
1363         { "BCM2E87" },
1364         { "BCM2E88" },
1365         { "BCM2E89" },
1366         { "BCM2E8A" },
1367         { "BCM2E8B" },
1368         { "BCM2E8C" },
1369         { "BCM2E8D" },
1370         { "BCM2E8E" },
1371         { "BCM2E90" },
1372         { "BCM2E92" },
1373         { "BCM2E93" },
1374         { "BCM2E94" },
1375         { "BCM2E95" },
1376         { "BCM2E96" },
1377         { "BCM2E97" },
1378         { "BCM2E98" },
1379         { "BCM2E99" },
1380         { "BCM2E9A" },
1381         { "BCM2E9B" },
1382         { "BCM2E9C" },
1383         { "BCM2E9D" },
1384         { "BCM2EA0" },
1385         { "BCM2EA1" },
1386         { "BCM2EA2" },
1387         { "BCM2EA3" },
1388         { "BCM2EA4" },
1389         { "BCM2EA5" },
1390         { "BCM2EA6" },
1391         { "BCM2EA7" },
1392         { "BCM2EA8" },
1393         { "BCM2EA9" },
1394         { "BCM2EAA" },
1395         { "BCM2EAB" },
1396         { "BCM2EAC" },
1397         { },
1398 };
1399 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1400 #endif
1401
1402 /* suspend and resume callbacks */
1403 static const struct dev_pm_ops bcm_pm_ops = {
1404         SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1405         SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1406 };
1407
1408 static struct platform_driver bcm_driver = {
1409         .probe = bcm_probe,
1410         .remove = bcm_remove,
1411         .driver = {
1412                 .name = "hci_bcm",
1413                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1414                 .pm = &bcm_pm_ops,
1415         },
1416 };
1417
1418 static int bcm_serdev_probe(struct serdev_device *serdev)
1419 {
1420         struct bcm_device *bcmdev;
1421         const struct bcm_device_data *data;
1422         int err;
1423
1424         bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1425         if (!bcmdev)
1426                 return -ENOMEM;
1427
1428         bcmdev->dev = &serdev->dev;
1429 #ifdef CONFIG_PM
1430         bcmdev->hu = &bcmdev->serdev_hu;
1431 #endif
1432         bcmdev->serdev_hu.serdev = serdev;
1433         serdev_device_set_drvdata(serdev, bcmdev);
1434
1435         /* Initialize routing field to an unused value */
1436         bcmdev->pcm_int_params[0] = 0xff;
1437
1438         if (has_acpi_companion(&serdev->dev))
1439                 err = bcm_acpi_probe(bcmdev);
1440         else
1441                 err = bcm_of_probe(bcmdev);
1442         if (err)
1443                 return err;
1444
1445         err = bcm_get_resources(bcmdev);
1446         if (err)
1447                 return err;
1448
1449         if (!bcmdev->shutdown) {
1450                 dev_warn(&serdev->dev,
1451                          "No reset resource, using default baud rate\n");
1452                 bcmdev->oper_speed = bcmdev->init_speed;
1453         }
1454
1455         err = bcm_gpio_set_power(bcmdev, false);
1456         if (err)
1457                 dev_err(&serdev->dev, "Failed to power down\n");
1458
1459         data = device_get_match_data(bcmdev->dev);
1460         if (data) {
1461                 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
1462                 bcmdev->drive_rts_on_open = data->drive_rts_on_open;
1463         }
1464
1465         return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1466 }
1467
1468 static void bcm_serdev_remove(struct serdev_device *serdev)
1469 {
1470         struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1471
1472         hci_uart_unregister_device(&bcmdev->serdev_hu);
1473 }
1474
1475 #ifdef CONFIG_OF
1476 static struct bcm_device_data bcm4354_device_data = {
1477         .no_early_set_baudrate = true,
1478 };
1479
1480 static struct bcm_device_data bcm43438_device_data = {
1481         .drive_rts_on_open = true,
1482 };
1483
1484 static const struct of_device_id bcm_bluetooth_of_match[] = {
1485         { .compatible = "brcm,bcm20702a1" },
1486         { .compatible = "brcm,bcm4329-bt" },
1487         { .compatible = "brcm,bcm4345c5" },
1488         { .compatible = "brcm,bcm4330-bt" },
1489         { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
1490         { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
1491         { .compatible = "brcm,bcm4335a0" },
1492         { },
1493 };
1494 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1495 #endif
1496
1497 static struct serdev_device_driver bcm_serdev_driver = {
1498         .probe = bcm_serdev_probe,
1499         .remove = bcm_serdev_remove,
1500         .driver = {
1501                 .name = "hci_uart_bcm",
1502                 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1503                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1504                 .pm = &bcm_pm_ops,
1505         },
1506 };
1507
1508 int __init bcm_init(void)
1509 {
1510         /* For now, we need to keep both platform device
1511          * driver (ACPI generated) and serdev driver (DT).
1512          */
1513         platform_driver_register(&bcm_driver);
1514         serdev_device_driver_register(&bcm_serdev_driver);
1515
1516         return hci_uart_register_proto(&bcm_proto);
1517 }
1518
1519 int __exit bcm_deinit(void)
1520 {
1521         platform_driver_unregister(&bcm_driver);
1522         serdev_device_driver_unregister(&bcm_serdev_driver);
1523
1524         return hci_uart_unregister_proto(&bcm_proto);
1525 }