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/gpio/machine.h>
  24 #include <linux/tty.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/dmi.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/serdev.h>
  29
  30 #include <net/bluetooth/bluetooth.h>
  31 #include <net/bluetooth/hci_core.h>
  32
  33 #include "btbcm.h"
  34 #include "hci_uart.h"
  35
  36 #define BCM_NULL_PKT 0x00
  37 #define BCM_NULL_SIZE 0
  38
  39 #define BCM_LM_DIAG_PKT 0x07
  40 #define BCM_LM_DIAG_SIZE 63
  41
  42 #define BCM_TYPE49_PKT 0x31
  43 #define BCM_TYPE49_SIZE 0
  44
  45 #define BCM_TYPE52_PKT 0x34
  46 #define BCM_TYPE52_SIZE 0
  47
  48 #define BCM_AUTOSUSPEND_DELAY   5000 /* default autosleep delay */
  49
  50 #define BCM_NUM_SUPPLIES 2
  51
  52 /**
  53  * struct bcm_device_data - device specific data
  54  * @no_early_set_baudrate: Disallow set baudrate before driver setup()
  55  * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
  56  * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable
  57  * @max_autobaud_speed: max baudrate supported by device in autobaud mode
  58  * @max_speed: max baudrate supported
  59  */
  60 struct bcm_device_data {
  61         bool    no_early_set_baudrate;
  62         bool    drive_rts_on_open;
  63         bool    no_uart_clock_set;
  64         u32     max_autobaud_speed;
  65         u32     max_speed;
  66 };
  67
  68 /**
  69  * struct bcm_device - device driver resources
  70  * @serdev_hu: HCI UART controller struct
  71  * @list: bcm_device_list node
  72  * @dev: physical UART slave
  73  * @name: device name logged by bt_dev_*() functions
  74  * @device_wakeup: BT_WAKE pin,
  75  *      assert = Bluetooth device must wake up or remain awake,
  76  *      deassert = Bluetooth device may sleep when sleep criteria are met
  77  * @shutdown: BT_REG_ON pin,
  78  *      power up or power down Bluetooth device internal regulators
  79  * @reset: BT_RST_N pin,
  80  *      active low resets the Bluetooth logic core
  81  * @set_device_wakeup: callback to toggle BT_WAKE pin
  82  *      either by accessing @device_wakeup or by calling @btlp
  83  * @set_shutdown: callback to toggle BT_REG_ON pin
  84  *      either by accessing @shutdown or by calling @btpu/@btpd
  85  * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
  86  * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
  87  * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
  88  * @gpio_count: internal counter for GPIO resources associated with ACPI device
  89  * @gpio_int_idx: index in _CRS for GpioInt() resource
  90  * @txco_clk: external reference frequency clock used by Bluetooth device
  91  * @lpo_clk: external LPO clock used by Bluetooth device
  92  * @supplies: VBAT and VDDIO supplies used by Bluetooth device
  93  * @res_enabled: whether clocks and supplies are prepared and enabled
  94  * @init_speed: default baudrate of Bluetooth device;
  95  *      the host UART is initially set to this baudrate so that
  96  *      it can configure the Bluetooth device for @oper_speed
  97  * @oper_speed: preferred baudrate of Bluetooth device;
  98  *      set to 0 if @init_speed is already the preferred baudrate
  99  * @irq: interrupt triggered by HOST_WAKE_BT pin
 100  * @irq_active_low: whether @irq is active low
 101  * @irq_acquired: flag to show if IRQ handler has been assigned
 102  * @hu: pointer to HCI UART controller struct,
 103  *      used to disable flow control during runtime suspend and system sleep
 104  * @is_suspended: whether flow control is currently disabled
 105  * @no_early_set_baudrate: don't set_baudrate before setup()
 106  * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
 107  * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable
 108  * @pcm_int_params: keep the initial PCM configuration
 109  * @use_autobaud_mode: start Bluetooth device in autobaud mode
 110  * @max_autobaud_speed: max baudrate supported by device in autobaud mode
 111  */
 112 struct bcm_device {
 113         /* Must be the first member, hci_serdev.c expects this. */
 114         struct hci_uart         serdev_hu;
 115         struct list_head        list;
 116
 117         struct device           *dev;
 118
 119         const char              *name;
 120         struct gpio_desc        *device_wakeup;
 121         struct gpio_desc        *shutdown;
 122         struct gpio_desc        *reset;
 123         int                     (*set_device_wakeup)(struct bcm_device *, bool);
 124         int                     (*set_shutdown)(struct bcm_device *, bool);
 125 #ifdef CONFIG_ACPI
 126         acpi_handle             btlp, btpu, btpd;
 127         int                     gpio_count;
 128         int                     gpio_int_idx;
 129 #endif
 130
 131         struct clk              *txco_clk;
 132         struct clk              *lpo_clk;
 133         struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES];
 134         bool                    res_enabled;
 135
 136         u32                     init_speed;
 137         u32                     oper_speed;
 138         int                     irq;
 139         bool                    irq_active_low;
 140         bool                    irq_acquired;
 141
 142 #ifdef CONFIG_PM
 143         struct hci_uart         *hu;
 144         bool                    is_suspended;
 145 #endif
 146         bool                    no_early_set_baudrate;
 147         bool                    drive_rts_on_open;
 148         bool                    no_uart_clock_set;
 149         bool                    use_autobaud_mode;
 150         u8                      pcm_int_params[5];
 151         u32                     max_autobaud_speed;
 152 };
 153
 154 /* generic bcm uart resources */
 155 struct bcm_data {
 156         struct sk_buff          *rx_skb;
 157         struct sk_buff_head     txq;
 158
 159         struct bcm_device       *dev;
 160 };
 161
 162 /* List of BCM BT UART devices */
 163 static DEFINE_MUTEX(bcm_device_lock);
 164 static LIST_HEAD(bcm_device_list);
 165
 166 static int irq_polarity = -1;
 167 module_param(irq_polarity, int, 0444);
 168 MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
 169
 170 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
 171 {
 172         if (hu->serdev)
 173                 serdev_device_set_baudrate(hu->serdev, speed);
 174         else
 175                 hci_uart_set_baudrate(hu, speed);
 176 }
 177
 178 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
 179 {
 180         struct hci_dev *hdev = hu->hdev;
 181         struct bcm_data *bcm = hu->priv;
 182         struct sk_buff *skb;
 183         struct bcm_update_uart_baud_rate param;
 184
 185         if (speed > 3000000 && !bcm->dev->no_uart_clock_set) {
 186                 struct bcm_write_uart_clock_setting clock;
 187
 188                 clock.type = BCM_UART_CLOCK_48MHZ;
 189
 190                 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
 191
 192                 /* This Broadcom specific command changes the UART's controller
 193                  * clock for baud rate > 3000000.
 194                  */
 195                 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
 196                 if (IS_ERR(skb)) {
 197                         int err = PTR_ERR(skb);
 198                         bt_dev_err(hdev, "BCM: failed to write clock (%d)",
 199                                    err);
 200                         return err;
 201                 }
 202
 203                 kfree_skb(skb);
 204         }
 205
 206         bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
 207
 208         param.zero = cpu_to_le16(0);
 209         param.baud_rate = cpu_to_le32(speed);
 210
 211         /* This Broadcom specific command changes the UART's controller baud
 212          * rate.
 213          */
 214         skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
 215                              HCI_INIT_TIMEOUT);
 216         if (IS_ERR(skb)) {
 217                 int err = PTR_ERR(skb);
 218                 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
 219                            err);
 220                 return err;
 221         }
 222
 223         kfree_skb(skb);
 224
 225         return 0;
 226 }
 227
 228 /* bcm_device_exists should be protected by bcm_device_lock */
 229 static bool bcm_device_exists(struct bcm_device *device)
 230 {
 231         struct list_head *p;
 232
 233 #ifdef CONFIG_PM
 234         /* Devices using serdev always exist */
 235         if (device && device->hu && device->hu->serdev)
 236                 return true;
 237 #endif
 238
 239         list_for_each(p, &bcm_device_list) {
 240                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 241
 242                 if (device == dev)
 243                         return true;
 244         }
 245
 246         return false;
 247 }
 248
 249 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 250 {
 251         int err;
 252
 253         if (powered && !dev->res_enabled) {
 254                 /* Intel Macs use bcm_apple_get_resources() and don't
 255                  * have regulator supplies configured.
 256                  */
 257                 if (dev->supplies[0].supply) {
 258                         err = regulator_bulk_enable(BCM_NUM_SUPPLIES,
 259                                                     dev->supplies);
 260                         if (err)
 261                                 return err;
 262                 }
 263
 264                 /* LPO clock needs to be 32.768 kHz */
 265                 err = clk_set_rate(dev->lpo_clk, 32768);
 266                 if (err) {
 267                         dev_err(dev->dev, "Could not set LPO clock rate\n");
 268                         goto err_regulator_disable;
 269                 }
 270
 271                 err = clk_prepare_enable(dev->lpo_clk);
 272                 if (err)
 273                         goto err_regulator_disable;
 274
 275                 err = clk_prepare_enable(dev->txco_clk);
 276                 if (err)
 277                         goto err_lpo_clk_disable;
 278         }
 279
 280         err = dev->set_shutdown(dev, powered);
 281         if (err)
 282                 goto err_txco_clk_disable;
 283
 284         err = dev->set_device_wakeup(dev, powered);
 285         if (err)
 286                 goto err_revert_shutdown;
 287
 288         if (!powered && dev->res_enabled) {
 289                 clk_disable_unprepare(dev->txco_clk);
 290                 clk_disable_unprepare(dev->lpo_clk);
 291
 292                 /* Intel Macs use bcm_apple_get_resources() and don't
 293                  * have regulator supplies configured.
 294                  */
 295                 if (dev->supplies[0].supply)
 296                         regulator_bulk_disable(BCM_NUM_SUPPLIES,
 297                                                dev->supplies);
 298         }
 299
 300         /* wait for device to power on and come out of reset */
 301         usleep_range(100000, 120000);
 302
 303         dev->res_enabled = powered;
 304
 305         return 0;
 306
 307 err_revert_shutdown:
 308         dev->set_shutdown(dev, !powered);
 309 err_txco_clk_disable:
 310         if (powered && !dev->res_enabled)
 311                 clk_disable_unprepare(dev->txco_clk);
 312 err_lpo_clk_disable:
 313         if (powered && !dev->res_enabled)
 314                 clk_disable_unprepare(dev->lpo_clk);
 315 err_regulator_disable:
 316         if (powered && !dev->res_enabled)
 317                 regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies);
 318         return err;
 319 }
 320
 321 #ifdef CONFIG_PM
 322 static irqreturn_t bcm_host_wake(int irq, void *data)
 323 {
 324         struct bcm_device *bdev = data;
 325
 326         bt_dev_dbg(bdev, "Host wake IRQ");
 327
 328         pm_runtime_get(bdev->dev);
 329         pm_runtime_mark_last_busy(bdev->dev);
 330         pm_runtime_put_autosuspend(bdev->dev);
 331
 332         return IRQ_HANDLED;
 333 }
 334
 335 static int bcm_request_irq(struct bcm_data *bcm)
 336 {
 337         struct bcm_device *bdev = bcm->dev;
 338         int err;
 339
 340         mutex_lock(&bcm_device_lock);
 341         if (!bcm_device_exists(bdev)) {
 342                 err = -ENODEV;
 343                 goto unlock;
 344         }
 345
 346         if (bdev->irq <= 0) {
 347                 err = -EOPNOTSUPP;
 348                 goto unlock;
 349         }
 350
 351         err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
 352                                bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
 353                                                       IRQF_TRIGGER_RISING,
 354                                "host_wake", bdev);
 355         if (err) {
 356                 bdev->irq = err;
 357                 goto unlock;
 358         }
 359
 360         bdev->irq_acquired = true;
 361
 362         device_init_wakeup(bdev->dev, true);
 363
 364         pm_runtime_set_autosuspend_delay(bdev->dev,
 365                                          BCM_AUTOSUSPEND_DELAY);
 366         pm_runtime_use_autosuspend(bdev->dev);
 367         pm_runtime_set_active(bdev->dev);
 368         pm_runtime_enable(bdev->dev);
 369
 370 unlock:
 371         mutex_unlock(&bcm_device_lock);
 372
 373         return err;
 374 }
 375
 376 static const struct bcm_set_sleep_mode default_sleep_params = {
 377         .sleep_mode = 1,        /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
 378         .idle_host = 2,         /* idle threshold HOST, in 300ms */
 379         .idle_dev = 2,          /* idle threshold device, in 300ms */
 380         .bt_wake_active = 1,    /* BT_WAKE active mode: 1 = high, 0 = low */
 381         .host_wake_active = 0,  /* HOST_WAKE active mode: 1 = high, 0 = low */
 382         .allow_host_sleep = 1,  /* Allow host sleep in SCO flag */
 383         .combine_modes = 1,     /* Combine sleep and LPM flag */
 384         .tristate_control = 0,  /* Allow tri-state control of UART tx flag */
 385         /* Irrelevant USB flags */
 386         .usb_auto_sleep = 0,
 387         .usb_resume_timeout = 0,
 388         .break_to_host = 0,
 389         .pulsed_host_wake = 1,
 390 };
 391
 392 static int bcm_setup_sleep(struct hci_uart *hu)
 393 {
 394         struct bcm_data *bcm = hu->priv;
 395         struct sk_buff *skb;
 396         struct bcm_set_sleep_mode sleep_params = default_sleep_params;
 397
 398         sleep_params.host_wake_active = !bcm->dev->irq_active_low;
 399
 400         skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
 401                              &sleep_params, HCI_INIT_TIMEOUT);
 402         if (IS_ERR(skb)) {
 403                 int err = PTR_ERR(skb);
 404                 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
 405                 return err;
 406         }
 407         kfree_skb(skb);
 408
 409         bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
 410
 411         return 0;
 412 }
 413 #else
 414 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
 415 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
 416 #endif
 417
 418 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
 419 {
 420         struct hci_uart *hu = hci_get_drvdata(hdev);
 421         struct bcm_data *bcm = hu->priv;
 422         struct sk_buff *skb;
 423
 424         if (!test_bit(HCI_RUNNING, &hdev->flags))
 425                 return -ENETDOWN;
 426
 427         skb = bt_skb_alloc(3, GFP_KERNEL);
 428         if (!skb)
 429                 return -ENOMEM;
 430
 431         skb_put_u8(skb, BCM_LM_DIAG_PKT);
 432         skb_put_u8(skb, 0xf0);
 433         skb_put_u8(skb, enable);
 434
 435         skb_queue_tail(&bcm->txq, skb);
 436         hci_uart_tx_wakeup(hu);
 437
 438         return 0;
 439 }
 440
 441 static int bcm_open(struct hci_uart *hu)
 442 {
 443         struct bcm_data *bcm;
 444         struct list_head *p;
 445         int err;
 446
 447         bt_dev_dbg(hu->hdev, "hu %p", hu);
 448
 449         if (!hci_uart_has_flow_control(hu))
 450                 return -EOPNOTSUPP;
 451
 452         bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
 453         if (!bcm)
 454                 return -ENOMEM;
 455
 456         skb_queue_head_init(&bcm->txq);
 457
 458         hu->priv = bcm;
 459
 460         mutex_lock(&bcm_device_lock);
 461
 462         if (hu->serdev) {
 463                 bcm->dev = serdev_device_get_drvdata(hu->serdev);
 464                 goto out;
 465         }
 466
 467         if (!hu->tty->dev)
 468                 goto out;
 469
 470         list_for_each(p, &bcm_device_list) {
 471                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 472
 473                 /* Retrieve saved bcm_device based on parent of the
 474                  * platform device (saved during device probe) and
 475                  * parent of tty device used by hci_uart
 476                  */
 477                 if (hu->tty->dev->parent == dev->dev->parent) {
 478                         bcm->dev = dev;
 479 #ifdef CONFIG_PM
 480                         dev->hu = hu;
 481 #endif
 482                         break;
 483                 }
 484         }
 485
 486 out:
 487         if (bcm->dev) {
 488                 if (bcm->dev->use_autobaud_mode)
 489                         hci_uart_set_flow_control(hu, false);   /* Assert BT_UART_CTS_N */
 490                 else if (bcm->dev->drive_rts_on_open)
 491                         hci_uart_set_flow_control(hu, true);
 492
 493                 if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed)
 494                         hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed);
 495                 else
 496                         hu->init_speed = bcm->dev->init_speed;
 497
 498                 /* If oper_speed is set, ldisc/serdev will set the baudrate
 499                  * before calling setup()
 500                  */
 501                 if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode)
 502                         hu->oper_speed = bcm->dev->oper_speed;
 503
 504                 err = bcm_gpio_set_power(bcm->dev, true);
 505
 506                 if (bcm->dev->drive_rts_on_open)
 507                         hci_uart_set_flow_control(hu, false);
 508
 509                 if (err)
 510                         goto err_unset_hu;
 511         }
 512
 513         mutex_unlock(&bcm_device_lock);
 514         return 0;
 515
 516 err_unset_hu:
 517 #ifdef CONFIG_PM
 518         if (!hu->serdev)
 519                 bcm->dev->hu = NULL;
 520 #endif
 521         mutex_unlock(&bcm_device_lock);
 522         hu->priv = NULL;
 523         kfree(bcm);
 524         return err;
 525 }
 526
 527 static int bcm_close(struct hci_uart *hu)
 528 {
 529         struct bcm_data *bcm = hu->priv;
 530         struct bcm_device *bdev = NULL;
 531         int err;
 532
 533         bt_dev_dbg(hu->hdev, "hu %p", hu);
 534
 535         /* Protect bcm->dev against removal of the device or driver */
 536         mutex_lock(&bcm_device_lock);
 537
 538         if (hu->serdev) {
 539                 bdev = serdev_device_get_drvdata(hu->serdev);
 540         } else if (bcm_device_exists(bcm->dev)) {
 541                 bdev = bcm->dev;
 542 #ifdef CONFIG_PM
 543                 bdev->hu = NULL;
 544 #endif
 545         }
 546
 547         if (bdev) {
 548                 if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) {
 549                         devm_free_irq(bdev->dev, bdev->irq, bdev);
 550                         device_init_wakeup(bdev->dev, false);
 551                         pm_runtime_disable(bdev->dev);
 552                 }
 553
 554                 err = bcm_gpio_set_power(bdev, false);
 555                 if (err)
 556                         bt_dev_err(hu->hdev, "Failed to power down");
 557                 else
 558                         pm_runtime_set_suspended(bdev->dev);
 559         }
 560         mutex_unlock(&bcm_device_lock);
 561
 562         skb_queue_purge(&bcm->txq);
 563         kfree_skb(bcm->rx_skb);
 564         kfree(bcm);
 565
 566         hu->priv = NULL;
 567         return 0;
 568 }
 569
 570 static int bcm_flush(struct hci_uart *hu)
 571 {
 572         struct bcm_data *bcm = hu->priv;
 573
 574         bt_dev_dbg(hu->hdev, "hu %p", hu);
 575
 576         skb_queue_purge(&bcm->txq);
 577
 578         return 0;
 579 }
 580
 581 static int bcm_setup(struct hci_uart *hu)
 582 {
 583         struct bcm_data *bcm = hu->priv;
 584         bool fw_load_done = false;
 585         bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0);
 586         unsigned int speed;
 587         int err;
 588
 589         bt_dev_dbg(hu->hdev, "hu %p", hu);
 590
 591         hu->hdev->set_diag = bcm_set_diag;
 592         hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 593
 594         err = btbcm_initialize(hu->hdev, &fw_load_done, use_autobaud_mode);
 595         if (err)
 596                 return err;
 597
 598         if (!fw_load_done)
 599                 return 0;
 600
 601         /* Init speed if any */
 602         if (bcm->dev && bcm->dev->init_speed)
 603                 speed = bcm->dev->init_speed;
 604         else if (hu->proto->init_speed)
 605                 speed = hu->proto->init_speed;
 606         else
 607                 speed = 0;
 608
 609         if (speed)
 610                 host_set_baudrate(hu, speed);
 611
 612         /* Operational speed if any */
 613         if (hu->oper_speed)
 614                 speed = hu->oper_speed;
 615         else if (bcm->dev && bcm->dev->oper_speed)
 616                 speed = bcm->dev->oper_speed;
 617         else if (hu->proto->oper_speed)
 618                 speed = hu->proto->oper_speed;
 619         else
 620                 speed = 0;
 621
 622         if (speed) {
 623                 err = bcm_set_baudrate(hu, speed);
 624                 if (!err)
 625                         host_set_baudrate(hu, speed);
 626         }
 627
 628         /* PCM parameters if provided */
 629         if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
 630                 struct bcm_set_pcm_int_params params;
 631
 632                 btbcm_read_pcm_int_params(hu->hdev, &params);
 633
 634                 memcpy(&params, bcm->dev->pcm_int_params, 5);
 635                 btbcm_write_pcm_int_params(hu->hdev, &params);
 636         }
 637
 638         err = btbcm_finalize(hu->hdev, &fw_load_done, use_autobaud_mode);
 639         if (err)
 640                 return err;
 641
 642         /* Some devices ship with the controller default address.
 643          * Allow the bootloader to set a valid address through the
 644          * device tree.
 645          */
 646         set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hu->hdev->quirks);
 647
 648         if (!bcm_request_irq(bcm))
 649                 err = bcm_setup_sleep(hu);
 650
 651         return err;
 652 }
 653
 654 #define BCM_RECV_LM_DIAG \
 655         .type = BCM_LM_DIAG_PKT, \
 656         .hlen = BCM_LM_DIAG_SIZE, \
 657         .loff = 0, \
 658         .lsize = 0, \
 659         .maxlen = BCM_LM_DIAG_SIZE
 660
 661 #define BCM_RECV_NULL \
 662         .type = BCM_NULL_PKT, \
 663         .hlen = BCM_NULL_SIZE, \
 664         .loff = 0, \
 665         .lsize = 0, \
 666         .maxlen = BCM_NULL_SIZE
 667
 668 #define BCM_RECV_TYPE49 \
 669         .type = BCM_TYPE49_PKT, \
 670         .hlen = BCM_TYPE49_SIZE, \
 671         .loff = 0, \
 672         .lsize = 0, \
 673         .maxlen = BCM_TYPE49_SIZE
 674
 675 #define BCM_RECV_TYPE52 \
 676         .type = BCM_TYPE52_PKT, \
 677         .hlen = BCM_TYPE52_SIZE, \
 678         .loff = 0, \
 679         .lsize = 0, \
 680         .maxlen = BCM_TYPE52_SIZE
 681
 682 static const struct h4_recv_pkt bcm_recv_pkts[] = {
 683         { H4_RECV_ACL,      .recv = hci_recv_frame },
 684         { H4_RECV_SCO,      .recv = hci_recv_frame },
 685         { H4_RECV_EVENT,    .recv = hci_recv_frame },
 686         { H4_RECV_ISO,      .recv = hci_recv_frame },
 687         { BCM_RECV_LM_DIAG, .recv = hci_recv_diag  },
 688         { BCM_RECV_NULL,    .recv = hci_recv_diag  },
 689         { BCM_RECV_TYPE49,  .recv = hci_recv_diag  },
 690         { BCM_RECV_TYPE52,  .recv = hci_recv_diag  },
 691 };
 692
 693 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 694 {
 695         struct bcm_data *bcm = hu->priv;
 696
 697         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 698                 return -EUNATCH;
 699
 700         bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
 701                                   bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
 702         if (IS_ERR(bcm->rx_skb)) {
 703                 int err = PTR_ERR(bcm->rx_skb);
 704                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
 705                 bcm->rx_skb = NULL;
 706                 return err;
 707         } else if (!bcm->rx_skb) {
 708                 /* Delay auto-suspend when receiving completed packet */
 709                 mutex_lock(&bcm_device_lock);
 710                 if (bcm->dev && bcm_device_exists(bcm->dev)) {
 711                         pm_runtime_get(bcm->dev->dev);
 712                         pm_runtime_mark_last_busy(bcm->dev->dev);
 713                         pm_runtime_put_autosuspend(bcm->dev->dev);
 714                 }
 715                 mutex_unlock(&bcm_device_lock);
 716         }
 717
 718         return count;
 719 }
 720
 721 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 722 {
 723         struct bcm_data *bcm = hu->priv;
 724
 725         bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
 726
 727         /* Prepend skb with frame type */
 728         memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 729         skb_queue_tail(&bcm->txq, skb);
 730
 731         return 0;
 732 }
 733
 734 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
 735 {
 736         struct bcm_data *bcm = hu->priv;
 737         struct sk_buff *skb = NULL;
 738         struct bcm_device *bdev = NULL;
 739
 740         mutex_lock(&bcm_device_lock);
 741
 742         if (bcm_device_exists(bcm->dev)) {
 743                 bdev = bcm->dev;
 744                 pm_runtime_get_sync(bdev->dev);
 745                 /* Shall be resumed here */
 746         }
 747
 748         skb = skb_dequeue(&bcm->txq);
 749
 750         if (bdev) {
 751                 pm_runtime_mark_last_busy(bdev->dev);
 752                 pm_runtime_put_autosuspend(bdev->dev);
 753         }
 754
 755         mutex_unlock(&bcm_device_lock);
 756
 757         return skb;
 758 }
 759
 760 #ifdef CONFIG_PM
 761 static int bcm_suspend_device(struct device *dev)
 762 {
 763         struct bcm_device *bdev = dev_get_drvdata(dev);
 764         int err;
 765
 766         bt_dev_dbg(bdev, "");
 767
 768         if (!bdev->is_suspended && bdev->hu) {
 769                 hci_uart_set_flow_control(bdev->hu, true);
 770
 771                 /* Once this returns, driver suspends BT via GPIO */
 772                 bdev->is_suspended = true;
 773         }
 774
 775         /* Suspend the device */
 776         err = bdev->set_device_wakeup(bdev, false);
 777         if (err) {
 778                 if (bdev->is_suspended && bdev->hu) {
 779                         bdev->is_suspended = false;
 780                         hci_uart_set_flow_control(bdev->hu, false);
 781                 }
 782                 return -EBUSY;
 783         }
 784
 785         bt_dev_dbg(bdev, "suspend, delaying 15 ms");
 786         msleep(15);
 787
 788         return 0;
 789 }
 790
 791 static int bcm_resume_device(struct device *dev)
 792 {
 793         struct bcm_device *bdev = dev_get_drvdata(dev);
 794         int err;
 795
 796         bt_dev_dbg(bdev, "");
 797
 798         err = bdev->set_device_wakeup(bdev, true);
 799         if (err) {
 800                 dev_err(dev, "Failed to power up\n");
 801                 return err;
 802         }
 803
 804         bt_dev_dbg(bdev, "resume, delaying 15 ms");
 805         msleep(15);
 806
 807         /* When this executes, the device has woken up already */
 808         if (bdev->is_suspended && bdev->hu) {
 809                 bdev->is_suspended = false;
 810
 811                 hci_uart_set_flow_control(bdev->hu, false);
 812         }
 813
 814         return 0;
 815 }
 816 #endif
 817
 818 #ifdef CONFIG_PM_SLEEP
 819 /* suspend callback */
 820 static int bcm_suspend(struct device *dev)
 821 {
 822         struct bcm_device *bdev = dev_get_drvdata(dev);
 823         int error;
 824
 825         bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
 826
 827         /*
 828          * When used with a device instantiated as platform_device, bcm_suspend
 829          * can be called at any time as long as the platform device is bound,
 830          * so it should use bcm_device_lock to protect access to hci_uart
 831          * and device_wake-up GPIO.
 832          */
 833         mutex_lock(&bcm_device_lock);
 834
 835         if (!bdev->hu)
 836                 goto unlock;
 837
 838         if (pm_runtime_active(dev))
 839                 bcm_suspend_device(dev);
 840
 841         if (device_may_wakeup(dev) && bdev->irq > 0) {
 842                 error = enable_irq_wake(bdev->irq);
 843                 if (!error)
 844                         bt_dev_dbg(bdev, "BCM irq: enabled");
 845         }
 846
 847 unlock:
 848         mutex_unlock(&bcm_device_lock);
 849
 850         return 0;
 851 }
 852
 853 /* resume callback */
 854 static int bcm_resume(struct device *dev)
 855 {
 856         struct bcm_device *bdev = dev_get_drvdata(dev);
 857         int err = 0;
 858
 859         bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
 860
 861         /*
 862          * When used with a device instantiated as platform_device, bcm_resume
 863          * can be called at any time as long as platform device is bound,
 864          * so it should use bcm_device_lock to protect access to hci_uart
 865          * and device_wake-up GPIO.
 866          */
 867         mutex_lock(&bcm_device_lock);
 868
 869         if (!bdev->hu)
 870                 goto unlock;
 871
 872         if (device_may_wakeup(dev) && bdev->irq > 0) {
 873                 disable_irq_wake(bdev->irq);
 874                 bt_dev_dbg(bdev, "BCM irq: disabled");
 875         }
 876
 877         err = bcm_resume_device(dev);
 878
 879 unlock:
 880         mutex_unlock(&bcm_device_lock);
 881
 882         if (!err) {
 883                 pm_runtime_disable(dev);
 884                 pm_runtime_set_active(dev);
 885                 pm_runtime_enable(dev);
 886         }
 887
 888         return 0;
 889 }
 890 #endif
 891
 892 /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
 893 static struct gpiod_lookup_table irq_on_int33fc02_pin17_gpios = {
 894         .dev_id = "serial0-0",
 895         .table = {
 896                 GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH),
 897                 { }
 898         },
 899 };
 900
 901 static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
 902         {
 903                 .ident = "Acer Iconia One 7 B1-750",
 904                 .matches = {
 905                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 906                         DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"),
 907                 },
 908                 .driver_data = &irq_on_int33fc02_pin17_gpios,
 909         },
 910         {
 911                 .ident = "Asus TF103C",
 912                 .matches = {
 913                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
 914                         DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
 915                 },
 916                 .driver_data = &irq_on_int33fc02_pin17_gpios,
 917         },
 918         {
 919                 .ident = "Lenovo Yoga Tablet 2 830F/L / 1050F/L",
 920                 .matches = {
 921                         DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."),
 922                         DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"),
 923                         DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
 924                         /* Partial match on beginning of BIOS version */
 925                         DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"),
 926                 },
 927                 .driver_data = &irq_on_int33fc02_pin17_gpios,
 928         },
 929         {
 930                 .ident = "Meegopad T08",
 931                 .matches = {
 932                         DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
 933                                         "To be filled by OEM."),
 934                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
 935                         DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
 936                 },
 937         },
 938         { }
 939 };
 940
 941 #ifdef CONFIG_ACPI
 942 static const struct acpi_gpio_params first_gpio = { 0, 0, false };
 943 static const struct acpi_gpio_params second_gpio = { 1, 0, false };
 944 static const struct acpi_gpio_params third_gpio = { 2, 0, false };
 945
 946 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
 947         { "device-wakeup-gpios", &first_gpio, 1 },
 948         { "shutdown-gpios", &second_gpio, 1 },
 949         { "host-wakeup-gpios", &third_gpio, 1 },
 950         { },
 951 };
 952
 953 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
 954         { "host-wakeup-gpios", &first_gpio, 1 },
 955         { "device-wakeup-gpios", &second_gpio, 1 },
 956         { "shutdown-gpios", &third_gpio, 1 },
 957         { },
 958 };
 959
 960 static int bcm_resource(struct acpi_resource *ares, void *data)
 961 {
 962         struct bcm_device *dev = data;
 963         struct acpi_resource_extended_irq *irq;
 964         struct acpi_resource_gpio *gpio;
 965         struct acpi_resource_uart_serialbus *sb;
 966
 967         switch (ares->type) {
 968         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 969                 irq = &ares->data.extended_irq;
 970                 if (irq->polarity != ACPI_ACTIVE_LOW)
 971                         dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
 972                 dev->irq_active_low = true;
 973                 break;
 974
 975         case ACPI_RESOURCE_TYPE_GPIO:
 976                 gpio = &ares->data.gpio;
 977                 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
 978                         dev->gpio_int_idx = dev->gpio_count;
 979                         dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
 980                 }
 981                 dev->gpio_count++;
 982                 break;
 983
 984         case ACPI_RESOURCE_TYPE_SERIAL_BUS:
 985                 sb = &ares->data.uart_serial_bus;
 986                 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
 987                         dev->init_speed = sb->default_baud_rate;
 988                         dev->oper_speed = 4000000;
 989                 }
 990                 break;
 991
 992         default:
 993                 break;
 994         }
 995
 996         return 0;
 997 }
 998
 999 static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
1000 {
1001         if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
1002                 return -EIO;
1003
1004         return 0;
1005 }
1006
1007 static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
1008 {
1009         if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
1010                                               NULL, NULL, NULL)))
1011                 return -EIO;
1012
1013         return 0;
1014 }
1015
1016 static int bcm_apple_get_resources(struct bcm_device *dev)
1017 {
1018         struct acpi_device *adev = ACPI_COMPANION(dev->dev);
1019         const union acpi_object *obj;
1020
1021         if (!adev ||
1022             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
1023             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
1024             ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
1025                 return -ENODEV;
1026
1027         if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
1028             obj->buffer.length == 8)
1029                 dev->init_speed = *(u64 *)obj->buffer.pointer;
1030
1031         dev->set_device_wakeup = bcm_apple_set_device_wakeup;
1032         dev->set_shutdown = bcm_apple_set_shutdown;
1033
1034         return 0;
1035 }
1036 #else
1037 static inline int bcm_apple_get_resources(struct bcm_device *dev)
1038 {
1039         return -EOPNOTSUPP;
1040 }
1041 #endif /* CONFIG_ACPI */
1042
1043 static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
1044 {
1045         gpiod_set_value_cansleep(dev->device_wakeup, awake);
1046         return 0;
1047 }
1048
1049 static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
1050 {
1051         gpiod_set_value_cansleep(dev->shutdown, powered);
1052         if (dev->reset)
1053                 /*
1054                  * The reset line is asserted on powerdown and deasserted
1055                  * on poweron so the inverse of powered is used. Notice
1056                  * that the GPIO line BT_RST_N needs to be specified as
1057                  * active low in the device tree or similar system
1058                  * description.
1059                  */
1060                 gpiod_set_value_cansleep(dev->reset, !powered);
1061         return 0;
1062 }
1063
1064 /* Try a bunch of names for TXCO */
1065 static struct clk *bcm_get_txco(struct device *dev)
1066 {
1067         struct clk *clk;
1068
1069         /* New explicit name */
1070         clk = devm_clk_get(dev, "txco");
1071         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1072                 return clk;
1073
1074         /* Deprecated name */
1075         clk = devm_clk_get(dev, "extclk");
1076         if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
1077                 return clk;
1078
1079         /* Original code used no name at all */
1080         return devm_clk_get(dev, NULL);
1081 }
1082
1083 static int bcm_get_resources(struct bcm_device *dev)
1084 {
1085         const struct dmi_system_id *broken_irq_dmi_id;
1086         const char *irq_con_id = "host-wakeup";
1087         int err;
1088
1089         dev->name = dev_name(dev->dev);
1090
1091         if (x86_apple_machine && !bcm_apple_get_resources(dev))
1092                 return 0;
1093
1094         dev->txco_clk = bcm_get_txco(dev->dev);
1095
1096         /* Handle deferred probing */
1097         if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER))
1098                 return PTR_ERR(dev->txco_clk);
1099
1100         /* Ignore all other errors as before */
1101         if (IS_ERR(dev->txco_clk))
1102                 dev->txco_clk = NULL;
1103
1104         dev->lpo_clk = devm_clk_get(dev->dev, "lpo");
1105         if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER))
1106                 return PTR_ERR(dev->lpo_clk);
1107
1108         if (IS_ERR(dev->lpo_clk))
1109                 dev->lpo_clk = NULL;
1110
1111         /* Check if we accidentally fetched the lpo clock twice */
1112         if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) {
1113                 devm_clk_put(dev->dev, dev->txco_clk);
1114                 dev->txco_clk = NULL;
1115         }
1116
1117         dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
1118                                                      GPIOD_OUT_LOW);
1119         if (IS_ERR(dev->device_wakeup))
1120                 return PTR_ERR(dev->device_wakeup);
1121
1122         dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
1123                                                 GPIOD_OUT_LOW);
1124         if (IS_ERR(dev->shutdown))
1125                 return PTR_ERR(dev->shutdown);
1126
1127         dev->reset = devm_gpiod_get_optional(dev->dev, "reset",
1128                                              GPIOD_OUT_LOW);
1129         if (IS_ERR(dev->reset))
1130                 return PTR_ERR(dev->reset);
1131
1132         dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
1133         dev->set_shutdown = bcm_gpio_set_shutdown;
1134
1135         dev->supplies[0].supply = "vbat";
1136         dev->supplies[1].supply = "vddio";
1137         err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES,
1138                                       dev->supplies);
1139         if (err)
1140                 return err;
1141
1142         broken_irq_dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
1143         if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) {
1144                 gpiod_add_lookup_table(broken_irq_dmi_id->driver_data);
1145                 irq_con_id = "host-wakeup-alt";
1146                 dev->irq_active_low = false;
1147                 dev->irq = 0;
1148         }
1149
1150         /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
1151         if (dev->irq <= 0) {
1152                 struct gpio_desc *gpio;
1153
1154                 gpio = devm_gpiod_get_optional(dev->dev, irq_con_id, GPIOD_IN);
1155                 if (IS_ERR(gpio))
1156                         return PTR_ERR(gpio);
1157
1158                 dev->irq = gpiod_to_irq(gpio);
1159         }
1160
1161         if (broken_irq_dmi_id) {
1162                 if (broken_irq_dmi_id->driver_data) {
1163                         gpiod_remove_lookup_table(broken_irq_dmi_id->driver_data);
1164                 } else {
1165                         dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
1166                                  broken_irq_dmi_id->ident);
1167                         dev->irq = 0;
1168                 }
1169         }
1170
1171         dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
1172         return 0;
1173 }
1174
1175 #ifdef CONFIG_ACPI
1176 static int bcm_acpi_probe(struct bcm_device *dev)
1177 {
1178         LIST_HEAD(resources);
1179         const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
1180         struct resource_entry *entry;
1181         int ret;
1182
1183         /* Retrieve UART ACPI info */
1184         dev->gpio_int_idx = -1;
1185         ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
1186                                      &resources, bcm_resource, dev);
1187         if (ret < 0)
1188                 return ret;
1189
1190         resource_list_for_each_entry(entry, &resources) {
1191                 if (resource_type(entry->res) == IORESOURCE_IRQ) {
1192                         dev->irq = entry->res->start;
1193                         break;
1194                 }
1195         }
1196         acpi_dev_free_resource_list(&resources);
1197
1198         /* If the DSDT uses an Interrupt resource for the IRQ, then there are
1199          * only 2 GPIO resources, we use the irq-last mapping for this, since
1200          * we already have an irq the 3th / last mapping will not be used.
1201          */
1202         if (dev->irq)
1203                 gpio_mapping = acpi_bcm_int_last_gpios;
1204         else if (dev->gpio_int_idx == 0)
1205                 gpio_mapping = acpi_bcm_int_first_gpios;
1206         else if (dev->gpio_int_idx == 2)
1207                 gpio_mapping = acpi_bcm_int_last_gpios;
1208         else
1209                 dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
1210                          dev->gpio_int_idx);
1211
1212         /* Warn if our expectations are not met. */
1213         if (dev->gpio_count != (dev->irq ? 2 : 3))
1214                 dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
1215                          dev->gpio_count);
1216
1217         ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
1218         if (ret)
1219                 return ret;
1220
1221         if (irq_polarity != -1) {
1222                 dev->irq_active_low = irq_polarity;
1223                 dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
1224                          dev->irq_active_low ? "low" : "high");
1225         }
1226
1227         return 0;
1228 }
1229 #else
1230 static int bcm_acpi_probe(struct bcm_device *dev)
1231 {
1232         return -EINVAL;
1233 }
1234 #endif /* CONFIG_ACPI */
1235
1236 static int bcm_of_probe(struct bcm_device *bdev)
1237 {
1238         bdev->use_autobaud_mode = device_property_read_bool(bdev->dev,
1239                                                             "brcm,requires-autobaud-mode");
1240         device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
1241         device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
1242                                       bdev->pcm_int_params, 5);
1243         bdev->irq = of_irq_get_byname(bdev->dev->of_node, "host-wakeup");
1244         bdev->irq_active_low = irq_get_trigger_type(bdev->irq)
1245                              & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW);
1246         return 0;
1247 }
1248
1249 static int bcm_probe(struct platform_device *pdev)
1250 {
1251         struct bcm_device *dev;
1252         int ret;
1253
1254         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1255         if (!dev)
1256                 return -ENOMEM;
1257
1258         dev->dev = &pdev->dev;
1259
1260         ret = platform_get_irq(pdev, 0);
1261         if (ret < 0)
1262                 return ret;
1263
1264         dev->irq = ret;
1265
1266         /* Initialize routing field to an unused value */
1267         dev->pcm_int_params[0] = 0xff;
1268
1269         if (has_acpi_companion(&pdev->dev)) {
1270                 ret = bcm_acpi_probe(dev);
1271                 if (ret)
1272                         return ret;
1273         }
1274
1275         ret = bcm_get_resources(dev);
1276         if (ret)
1277                 return ret;
1278
1279         platform_set_drvdata(pdev, dev);
1280
1281         dev_info(&pdev->dev, "%s device registered.\n", dev->name);
1282
1283         /* Place this instance on the device list */
1284         mutex_lock(&bcm_device_lock);
1285         list_add_tail(&dev->list, &bcm_device_list);
1286         mutex_unlock(&bcm_device_lock);
1287
1288         ret = bcm_gpio_set_power(dev, false);
1289         if (ret)
1290                 dev_err(&pdev->dev, "Failed to power down\n");
1291
1292         return 0;
1293 }
1294
1295 static int bcm_remove(struct platform_device *pdev)
1296 {
1297         struct bcm_device *dev = platform_get_drvdata(pdev);
1298
1299         mutex_lock(&bcm_device_lock);
1300         list_del(&dev->list);
1301         mutex_unlock(&bcm_device_lock);
1302
1303         dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
1304
1305         return 0;
1306 }
1307
1308 static const struct hci_uart_proto bcm_proto = {
1309         .id             = HCI_UART_BCM,
1310         .name           = "Broadcom",
1311         .manufacturer   = 15,
1312         .init_speed     = 115200,
1313         .open           = bcm_open,
1314         .close          = bcm_close,
1315         .flush          = bcm_flush,
1316         .setup          = bcm_setup,
1317         .set_baudrate   = bcm_set_baudrate,
1318         .recv           = bcm_recv,
1319         .enqueue        = bcm_enqueue,
1320         .dequeue        = bcm_dequeue,
1321 };
1322
1323 #ifdef CONFIG_ACPI
1324
1325 /* bcm43430a0/a1 BT does not support 48MHz UART clock, limit to 2000000 baud */
1326 static struct bcm_device_data bcm43430_device_data = {
1327         .max_speed = 2000000,
1328 };
1329
1330 static const struct acpi_device_id bcm_acpi_match[] = {
1331         { "BCM2E00" },
1332         { "BCM2E01" },
1333         { "BCM2E02" },
1334         { "BCM2E03" },
1335         { "BCM2E04" },
1336         { "BCM2E05" },
1337         { "BCM2E06" },
1338         { "BCM2E07" },
1339         { "BCM2E08" },
1340         { "BCM2E09" },
1341         { "BCM2E0A" },
1342         { "BCM2E0B" },
1343         { "BCM2E0C" },
1344         { "BCM2E0D" },
1345         { "BCM2E0E" },
1346         { "BCM2E0F" },
1347         { "BCM2E10" },
1348         { "BCM2E11" },
1349         { "BCM2E12" },
1350         { "BCM2E13" },
1351         { "BCM2E14" },
1352         { "BCM2E15" },
1353         { "BCM2E16" },
1354         { "BCM2E17" },
1355         { "BCM2E18" },
1356         { "BCM2E19" },
1357         { "BCM2E1A" },
1358         { "BCM2E1B" },
1359         { "BCM2E1C" },
1360         { "BCM2E1D" },
1361         { "BCM2E1F" },
1362         { "BCM2E20" },
1363         { "BCM2E21" },
1364         { "BCM2E22" },
1365         { "BCM2E23" },
1366         { "BCM2E24" },
1367         { "BCM2E25" },
1368         { "BCM2E26" },
1369         { "BCM2E27" },
1370         { "BCM2E28" },
1371         { "BCM2E29" },
1372         { "BCM2E2A" },
1373         { "BCM2E2B" },
1374         { "BCM2E2C" },
1375         { "BCM2E2D" },
1376         { "BCM2E2E" },
1377         { "BCM2E2F" },
1378         { "BCM2E30" },
1379         { "BCM2E31" },
1380         { "BCM2E32" },
1381         { "BCM2E33" },
1382         { "BCM2E34" },
1383         { "BCM2E35" },
1384         { "BCM2E36" },
1385         { "BCM2E37" },
1386         { "BCM2E38" },
1387         { "BCM2E39" },
1388         { "BCM2E3A" },
1389         { "BCM2E3B" },
1390         { "BCM2E3C" },
1391         { "BCM2E3D" },
1392         { "BCM2E3E" },
1393         { "BCM2E3F" },
1394         { "BCM2E40" },
1395         { "BCM2E41" },
1396         { "BCM2E42" },
1397         { "BCM2E43" },
1398         { "BCM2E44" },
1399         { "BCM2E45" },
1400         { "BCM2E46" },
1401         { "BCM2E47" },
1402         { "BCM2E48" },
1403         { "BCM2E49" },
1404         { "BCM2E4A" },
1405         { "BCM2E4B" },
1406         { "BCM2E4C" },
1407         { "BCM2E4D" },
1408         { "BCM2E4E" },
1409         { "BCM2E4F" },
1410         { "BCM2E50" },
1411         { "BCM2E51" },
1412         { "BCM2E52" },
1413         { "BCM2E53" },
1414         { "BCM2E54" },
1415         { "BCM2E55" },
1416         { "BCM2E56" },
1417         { "BCM2E57" },
1418         { "BCM2E58" },
1419         { "BCM2E59" },
1420         { "BCM2E5A" },
1421         { "BCM2E5B" },
1422         { "BCM2E5C" },
1423         { "BCM2E5D" },
1424         { "BCM2E5E" },
1425         { "BCM2E5F" },
1426         { "BCM2E60" },
1427         { "BCM2E61" },
1428         { "BCM2E62" },
1429         { "BCM2E63" },
1430         { "BCM2E64" },
1431         { "BCM2E65" },
1432         { "BCM2E66" },
1433         { "BCM2E67" },
1434         { "BCM2E68" },
1435         { "BCM2E69" },
1436         { "BCM2E6B" },
1437         { "BCM2E6D" },
1438         { "BCM2E6E" },
1439         { "BCM2E6F" },
1440         { "BCM2E70" },
1441         { "BCM2E71" },
1442         { "BCM2E72" },
1443         { "BCM2E73" },
1444         { "BCM2E74", (long)&bcm43430_device_data },
1445         { "BCM2E75", (long)&bcm43430_device_data },
1446         { "BCM2E76" },
1447         { "BCM2E77" },
1448         { "BCM2E78" },
1449         { "BCM2E79" },
1450         { "BCM2E7A" },
1451         { "BCM2E7B", (long)&bcm43430_device_data },
1452         { "BCM2E7C" },
1453         { "BCM2E7D" },
1454         { "BCM2E7E" },
1455         { "BCM2E7F" },
1456         { "BCM2E80", (long)&bcm43430_device_data },
1457         { "BCM2E81" },
1458         { "BCM2E82" },
1459         { "BCM2E83" },
1460         { "BCM2E84" },
1461         { "BCM2E85" },
1462         { "BCM2E86" },
1463         { "BCM2E87" },
1464         { "BCM2E88" },
1465         { "BCM2E89", (long)&bcm43430_device_data },
1466         { "BCM2E8A" },
1467         { "BCM2E8B" },
1468         { "BCM2E8C" },
1469         { "BCM2E8D" },
1470         { "BCM2E8E" },
1471         { "BCM2E90" },
1472         { "BCM2E92" },
1473         { "BCM2E93" },
1474         { "BCM2E94", (long)&bcm43430_device_data },
1475         { "BCM2E95" },
1476         { "BCM2E96" },
1477         { "BCM2E97" },
1478         { "BCM2E98" },
1479         { "BCM2E99", (long)&bcm43430_device_data },
1480         { "BCM2E9A" },
1481         { "BCM2E9B", (long)&bcm43430_device_data },
1482         { "BCM2E9C" },
1483         { "BCM2E9D" },
1484         { "BCM2E9F", (long)&bcm43430_device_data },
1485         { "BCM2EA0" },
1486         { "BCM2EA1" },
1487         { "BCM2EA2", (long)&bcm43430_device_data },
1488         { "BCM2EA3", (long)&bcm43430_device_data },
1489         { "BCM2EA4" },
1490         { "BCM2EA5" },
1491         { "BCM2EA6" },
1492         { "BCM2EA7" },
1493         { "BCM2EA8" },
1494         { "BCM2EA9" },
1495         { "BCM2EAA", (long)&bcm43430_device_data },
1496         { "BCM2EAB", (long)&bcm43430_device_data },
1497         { "BCM2EAC", (long)&bcm43430_device_data },
1498         { },
1499 };
1500 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
1501 #endif
1502
1503 /* suspend and resume callbacks */
1504 static const struct dev_pm_ops bcm_pm_ops = {
1505         SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
1506         SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
1507 };
1508
1509 static struct platform_driver bcm_driver = {
1510         .probe = bcm_probe,
1511         .remove = bcm_remove,
1512         .driver = {
1513                 .name = "hci_bcm",
1514                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1515                 .pm = &bcm_pm_ops,
1516         },
1517 };
1518
1519 static int bcm_serdev_probe(struct serdev_device *serdev)
1520 {
1521         struct bcm_device *bcmdev;
1522         const struct bcm_device_data *data;
1523         int err;
1524
1525         bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
1526         if (!bcmdev)
1527                 return -ENOMEM;
1528
1529         bcmdev->dev = &serdev->dev;
1530 #ifdef CONFIG_PM
1531         bcmdev->hu = &bcmdev->serdev_hu;
1532 #endif
1533         bcmdev->serdev_hu.serdev = serdev;
1534         serdev_device_set_drvdata(serdev, bcmdev);
1535
1536         /* Initialize routing field to an unused value */
1537         bcmdev->pcm_int_params[0] = 0xff;
1538
1539         if (has_acpi_companion(&serdev->dev))
1540                 err = bcm_acpi_probe(bcmdev);
1541         else
1542                 err = bcm_of_probe(bcmdev);
1543         if (err)
1544                 return err;
1545
1546         err = bcm_get_resources(bcmdev);
1547         if (err)
1548                 return err;
1549
1550         if (!bcmdev->shutdown) {
1551                 dev_warn(&serdev->dev,
1552                          "No reset resource, using default baud rate\n");
1553                 bcmdev->oper_speed = bcmdev->init_speed;
1554         }
1555
1556         err = bcm_gpio_set_power(bcmdev, false);
1557         if (err)
1558                 dev_err(&serdev->dev, "Failed to power down\n");
1559
1560         data = device_get_match_data(bcmdev->dev);
1561         if (data) {
1562                 bcmdev->max_autobaud_speed = data->max_autobaud_speed;
1563                 bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
1564                 bcmdev->drive_rts_on_open = data->drive_rts_on_open;
1565                 bcmdev->no_uart_clock_set = data->no_uart_clock_set;
1566                 if (data->max_speed && bcmdev->oper_speed > data->max_speed)
1567                         bcmdev->oper_speed = data->max_speed;
1568         }
1569
1570         return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
1571 }
1572
1573 static void bcm_serdev_remove(struct serdev_device *serdev)
1574 {
1575         struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
1576
1577         hci_uart_unregister_device(&bcmdev->serdev_hu);
1578 }
1579
1580 #ifdef CONFIG_OF
1581 static struct bcm_device_data bcm4354_device_data = {
1582         .no_early_set_baudrate = true,
1583 };
1584
1585 static struct bcm_device_data bcm43438_device_data = {
1586         .drive_rts_on_open = true,
1587 };
1588
1589 static struct bcm_device_data cyw4373a0_device_data = {
1590         .no_uart_clock_set = true,
1591 };
1592
1593 static struct bcm_device_data cyw55572_device_data = {
1594         .max_autobaud_speed = 921600,
1595 };
1596
1597 static const struct of_device_id bcm_bluetooth_of_match[] = {
1598         { .compatible = "brcm,bcm20702a1" },
1599         { .compatible = "brcm,bcm4329-bt" },
1600         { .compatible = "brcm,bcm4330-bt" },
1601         { .compatible = "brcm,bcm4334-bt" },
1602         { .compatible = "brcm,bcm4345c5" },
1603         { .compatible = "brcm,bcm43430a0-bt" },
1604         { .compatible = "brcm,bcm43430a1-bt" },
1605         { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
1606         { .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data },
1607         { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
1608         { .compatible = "brcm,bcm4335a0" },
1609         { .compatible = "cypress,cyw4373a0-bt", .data = &cyw4373a0_device_data },
1610         { .compatible = "infineon,cyw55572-bt", .data = &cyw55572_device_data },
1611         { },
1612 };
1613 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
1614 #endif
1615
1616 static struct serdev_device_driver bcm_serdev_driver = {
1617         .probe = bcm_serdev_probe,
1618         .remove = bcm_serdev_remove,
1619         .driver = {
1620                 .name = "hci_uart_bcm",
1621                 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1622                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
1623                 .pm = &bcm_pm_ops,
1624         },
1625 };
1626
1627 int __init bcm_init(void)
1628 {
1629         /* For now, we need to keep both platform device
1630          * driver (ACPI generated) and serdev driver (DT).
1631          */
1632         platform_driver_register(&bcm_driver);
1633         serdev_device_driver_register(&bcm_serdev_driver);
1634
1635         return hci_uart_register_proto(&bcm_proto);
1636 }
1637
1638 int __exit bcm_deinit(void)
1639 {
1640         platform_driver_unregister(&bcm_driver);
1641         serdev_device_driver_unregister(&bcm_serdev_driver);
1642
1643         return hci_uart_unregister_proto(&bcm_proto);
1644 }