drivers/bluetooth/hci_bcm.c

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