drivers/bluetooth/hci_bcm.c

   1 /*
   2  *
   3  *  Bluetooth HCI UART driver for Broadcom devices
   4  *
   5  *  Copyright (C) 2015  Intel Corporation
   6  *
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <linux/kernel.h>
  25 #include <linux/errno.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/firmware.h>
  28 #include <linux/module.h>
  29 #include <linux/acpi.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/clk.h>
  32 #include <linux/gpio/consumer.h>
  33 #include <linux/tty.h>
  34 #include <linux/interrupt.h>
  35
  36 #include <net/bluetooth/bluetooth.h>
  37 #include <net/bluetooth/hci_core.h>
  38
  39 #include "btbcm.h"
  40 #include "hci_uart.h"
  41
  42 struct bcm_device {
  43         struct list_head        list;
  44
  45         struct platform_device  *pdev;
  46
  47         const char              *name;
  48         struct gpio_desc        *device_wakeup;
  49         struct gpio_desc        *shutdown;
  50
  51         struct clk              *clk;
  52         bool                    clk_enabled;
  53
  54         u32                     init_speed;
  55         int                     irq;
  56         u8                      irq_polarity;
  57
  58 #ifdef CONFIG_PM_SLEEP
  59         struct hci_uart         *hu;
  60         bool                    is_suspended; /* suspend/resume flag */
  61 #endif
  62 };
  63
  64 struct bcm_data {
  65         struct sk_buff          *rx_skb;
  66         struct sk_buff_head     txq;
  67
  68         struct bcm_device       *dev;
  69 };
  70
  71 /* List of BCM BT UART devices */
  72 static DEFINE_MUTEX(bcm_device_lock);
  73 static LIST_HEAD(bcm_device_list);
  74
  75 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
  76 {
  77         struct hci_dev *hdev = hu->hdev;
  78         struct sk_buff *skb;
  79         struct bcm_update_uart_baud_rate param;
  80
  81         if (speed > 3000000) {
  82                 struct bcm_write_uart_clock_setting clock;
  83
  84                 clock.type = BCM_UART_CLOCK_48MHZ;
  85
  86                 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
  87
  88                 /* This Broadcom specific command changes the UART's controller
  89                  * clock for baud rate > 3000000.
  90                  */
  91                 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
  92                 if (IS_ERR(skb)) {
  93                         int err = PTR_ERR(skb);
  94                         bt_dev_err(hdev, "BCM: failed to write clock (%d)",
  95                                    err);
  96                         return err;
  97                 }
  98
  99                 kfree_skb(skb);
 100         }
 101
 102         bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
 103
 104         param.zero = cpu_to_le16(0);
 105         param.baud_rate = cpu_to_le32(speed);
 106
 107         /* This Broadcom specific command changes the UART's controller baud
 108          * rate.
 109          */
 110         skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
 111                              HCI_INIT_TIMEOUT);
 112         if (IS_ERR(skb)) {
 113                 int err = PTR_ERR(skb);
 114                 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
 115                            err);
 116                 return err;
 117         }
 118
 119         kfree_skb(skb);
 120
 121         return 0;
 122 }
 123
 124 /* bcm_device_exists should be protected by bcm_device_lock */
 125 static bool bcm_device_exists(struct bcm_device *device)
 126 {
 127         struct list_head *p;
 128
 129         list_for_each(p, &bcm_device_list) {
 130                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 131
 132                 if (device == dev)
 133                         return true;
 134         }
 135
 136         return false;
 137 }
 138
 139 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 140 {
 141         if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
 142                 clk_enable(dev->clk);
 143
 144         gpiod_set_value(dev->shutdown, powered);
 145         gpiod_set_value(dev->device_wakeup, powered);
 146
 147         if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
 148                 clk_disable(dev->clk);
 149
 150         dev->clk_enabled = powered;
 151
 152         return 0;
 153 }
 154
 155 #ifdef CONFIG_PM_SLEEP
 156 static irqreturn_t bcm_host_wake(int irq, void *data)
 157 {
 158         struct bcm_device *bdev = data;
 159
 160         bt_dev_dbg(bdev, "Host wake IRQ");
 161
 162         return IRQ_HANDLED;
 163 }
 164
 165 static int bcm_request_irq(struct bcm_data *bcm)
 166 {
 167         struct bcm_device *bdev = bcm->dev;
 168         int err = 0;
 169
 170         /* If this is not a platform device, do not enable PM functionalities */
 171         mutex_lock(&bcm_device_lock);
 172         if (!bcm_device_exists(bdev)) {
 173                 err = -ENODEV;
 174                 goto unlock;
 175         }
 176
 177         if (bdev->irq > 0) {
 178                 err = devm_request_irq(&bdev->pdev->dev, bdev->irq,
 179                                        bcm_host_wake, IRQF_TRIGGER_RISING,
 180                                        "host_wake", bdev);
 181                 if (err)
 182                         goto unlock;
 183
 184                 device_init_wakeup(&bdev->pdev->dev, true);
 185         }
 186
 187 unlock:
 188         mutex_unlock(&bcm_device_lock);
 189
 190         return err;
 191 }
 192
 193 static const struct bcm_set_sleep_mode default_sleep_params = {
 194         .sleep_mode = 1,        /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
 195         .idle_host = 2,         /* idle threshold HOST, in 300ms */
 196         .idle_dev = 2,          /* idle threshold device, in 300ms */
 197         .bt_wake_active = 1,    /* BT_WAKE active mode: 1 = high, 0 = low */
 198         .host_wake_active = 0,  /* HOST_WAKE active mode: 1 = high, 0 = low */
 199         .allow_host_sleep = 1,  /* Allow host sleep in SCO flag */
 200         .combine_modes = 0,     /* Combine sleep and LPM flag */
 201         .tristate_control = 0,  /* Allow tri-state control of UART tx flag */
 202         /* Irrelevant USB flags */
 203         .usb_auto_sleep = 0,
 204         .usb_resume_timeout = 0,
 205         .pulsed_host_wake = 0,
 206         .break_to_host = 0
 207 };
 208
 209 static int bcm_setup_sleep(struct hci_uart *hu)
 210 {
 211         struct bcm_data *bcm = hu->priv;
 212         struct sk_buff *skb;
 213         struct bcm_set_sleep_mode sleep_params = default_sleep_params;
 214
 215         sleep_params.host_wake_active = !bcm->dev->irq_polarity;
 216
 217         skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
 218                              &sleep_params, HCI_INIT_TIMEOUT);
 219         if (IS_ERR(skb)) {
 220                 int err = PTR_ERR(skb);
 221                 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
 222                 return err;
 223         }
 224         kfree_skb(skb);
 225
 226         bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
 227
 228         return 0;
 229 }
 230 #else
 231 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
 232 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
 233 #endif
 234
 235 static int bcm_open(struct hci_uart *hu)
 236 {
 237         struct bcm_data *bcm;
 238         struct list_head *p;
 239
 240         bt_dev_dbg(hu->hdev, "hu %p", hu);
 241
 242         bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
 243         if (!bcm)
 244                 return -ENOMEM;
 245
 246         skb_queue_head_init(&bcm->txq);
 247
 248         hu->priv = bcm;
 249
 250         mutex_lock(&bcm_device_lock);
 251         list_for_each(p, &bcm_device_list) {
 252                 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
 253
 254                 /* Retrieve saved bcm_device based on parent of the
 255                  * platform device (saved during device probe) and
 256                  * parent of tty device used by hci_uart
 257                  */
 258                 if (hu->tty->dev->parent == dev->pdev->dev.parent) {
 259                         bcm->dev = dev;
 260                         hu->init_speed = dev->init_speed;
 261 #ifdef CONFIG_PM_SLEEP
 262                         dev->hu = hu;
 263 #endif
 264                         bcm_gpio_set_power(bcm->dev, true);
 265                         break;
 266                 }
 267         }
 268
 269         mutex_unlock(&bcm_device_lock);
 270
 271         return 0;
 272 }
 273
 274 static int bcm_close(struct hci_uart *hu)
 275 {
 276         struct bcm_data *bcm = hu->priv;
 277         struct bcm_device *bdev = bcm->dev;
 278
 279         bt_dev_dbg(hu->hdev, "hu %p", hu);
 280
 281         /* Protect bcm->dev against removal of the device or driver */
 282         mutex_lock(&bcm_device_lock);
 283         if (bcm_device_exists(bdev)) {
 284                 bcm_gpio_set_power(bdev, false);
 285 #ifdef CONFIG_PM_SLEEP
 286                 if (device_can_wakeup(&bdev->pdev->dev)) {
 287                         devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
 288                         device_init_wakeup(&bdev->pdev->dev, false);
 289                 }
 290
 291                 bdev->hu = NULL;
 292 #endif
 293         }
 294         mutex_unlock(&bcm_device_lock);
 295
 296         skb_queue_purge(&bcm->txq);
 297         kfree_skb(bcm->rx_skb);
 298         kfree(bcm);
 299
 300         hu->priv = NULL;
 301         return 0;
 302 }
 303
 304 static int bcm_flush(struct hci_uart *hu)
 305 {
 306         struct bcm_data *bcm = hu->priv;
 307
 308         bt_dev_dbg(hu->hdev, "hu %p", hu);
 309
 310         skb_queue_purge(&bcm->txq);
 311
 312         return 0;
 313 }
 314
 315 static int bcm_setup(struct hci_uart *hu)
 316 {
 317         struct bcm_data *bcm = hu->priv;
 318         char fw_name[64];
 319         const struct firmware *fw;
 320         unsigned int speed;
 321         int err;
 322
 323         bt_dev_dbg(hu->hdev, "hu %p", hu);
 324
 325         hu->hdev->set_bdaddr = btbcm_set_bdaddr;
 326
 327         err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name));
 328         if (err)
 329                 return err;
 330
 331         err = request_firmware(&fw, fw_name, &hu->hdev->dev);
 332         if (err < 0) {
 333                 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
 334                 return 0;
 335         }
 336
 337         err = btbcm_patchram(hu->hdev, fw);
 338         if (err) {
 339                 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
 340                 goto finalize;
 341         }
 342
 343         /* Init speed if any */
 344         if (hu->init_speed)
 345                 speed = hu->init_speed;
 346         else if (hu->proto->init_speed)
 347                 speed = hu->proto->init_speed;
 348         else
 349                 speed = 0;
 350
 351         if (speed)
 352                 hci_uart_set_baudrate(hu, speed);
 353
 354         /* Operational speed if any */
 355         if (hu->oper_speed)
 356                 speed = hu->oper_speed;
 357         else if (hu->proto->oper_speed)
 358                 speed = hu->proto->oper_speed;
 359         else
 360                 speed = 0;
 361
 362         if (speed) {
 363                 err = bcm_set_baudrate(hu, speed);
 364                 if (!err)
 365                         hci_uart_set_baudrate(hu, speed);
 366         }
 367
 368 finalize:
 369         release_firmware(fw);
 370
 371         err = btbcm_finalize(hu->hdev);
 372         if (err)
 373                 return err;
 374
 375         err = bcm_request_irq(bcm);
 376         if (!err)
 377                 err = bcm_setup_sleep(hu);
 378
 379         return err;
 380 }
 381
 382 static const struct h4_recv_pkt bcm_recv_pkts[] = {
 383         { H4_RECV_ACL,   .recv = hci_recv_frame },
 384         { H4_RECV_SCO,   .recv = hci_recv_frame },
 385         { H4_RECV_EVENT, .recv = hci_recv_frame },
 386 };
 387
 388 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 389 {
 390         struct bcm_data *bcm = hu->priv;
 391
 392         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 393                 return -EUNATCH;
 394
 395         bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
 396                                   bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
 397         if (IS_ERR(bcm->rx_skb)) {
 398                 int err = PTR_ERR(bcm->rx_skb);
 399                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
 400                 bcm->rx_skb = NULL;
 401                 return err;
 402         }
 403
 404         return count;
 405 }
 406
 407 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 408 {
 409         struct bcm_data *bcm = hu->priv;
 410
 411         bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
 412
 413         /* Prepend skb with frame type */
 414         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 415         skb_queue_tail(&bcm->txq, skb);
 416
 417         return 0;
 418 }
 419
 420 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
 421 {
 422         struct bcm_data *bcm = hu->priv;
 423
 424         return skb_dequeue(&bcm->txq);
 425 }
 426
 427 #ifdef CONFIG_PM_SLEEP
 428 /* Platform suspend callback */
 429 static int bcm_suspend(struct device *dev)
 430 {
 431         struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
 432         int error;
 433
 434         bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
 435
 436         mutex_lock(&bcm_device_lock);
 437
 438         if (!bdev->hu)
 439                 goto unlock;
 440
 441         if (!bdev->is_suspended) {
 442                 hci_uart_set_flow_control(bdev->hu, true);
 443
 444                 /* Once this callback returns, driver suspends BT via GPIO */
 445                 bdev->is_suspended = true;
 446         }
 447
 448         /* Suspend the device */
 449         if (bdev->device_wakeup) {
 450                 gpiod_set_value(bdev->device_wakeup, false);
 451                 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
 452                 mdelay(15);
 453         }
 454
 455         if (device_may_wakeup(&bdev->pdev->dev)) {
 456                 error = enable_irq_wake(bdev->irq);
 457                 if (!error)
 458                         bt_dev_dbg(bdev, "BCM irq: enabled");
 459         }
 460
 461 unlock:
 462         mutex_unlock(&bcm_device_lock);
 463
 464         return 0;
 465 }
 466
 467 /* Platform resume callback */
 468 static int bcm_resume(struct device *dev)
 469 {
 470         struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
 471
 472         bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
 473
 474         mutex_lock(&bcm_device_lock);
 475
 476         if (!bdev->hu)
 477                 goto unlock;
 478
 479         if (device_may_wakeup(&bdev->pdev->dev)) {
 480                 disable_irq_wake(bdev->irq);
 481                 bt_dev_dbg(bdev, "BCM irq: disabled");
 482         }
 483
 484         if (bdev->device_wakeup) {
 485                 gpiod_set_value(bdev->device_wakeup, true);
 486                 bt_dev_dbg(bdev, "resume, delaying 15 ms");
 487                 mdelay(15);
 488         }
 489
 490         /* When this callback executes, the device has woken up already */
 491         if (bdev->is_suspended) {
 492                 bdev->is_suspended = false;
 493
 494                 hci_uart_set_flow_control(bdev->hu, false);
 495         }
 496
 497 unlock:
 498         mutex_unlock(&bcm_device_lock);
 499
 500         return 0;
 501 }
 502 #endif
 503
 504 static const struct acpi_gpio_params device_wakeup_gpios = { 0, 0, false };
 505 static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false };
 506 static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false };
 507
 508 static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
 509         { "device-wakeup-gpios", &device_wakeup_gpios, 1 },
 510         { "shutdown-gpios", &shutdown_gpios, 1 },
 511         { "host-wakeup-gpios", &host_wakeup_gpios, 1 },
 512         { },
 513 };
 514
 515 #ifdef CONFIG_ACPI
 516 static int bcm_resource(struct acpi_resource *ares, void *data)
 517 {
 518         struct bcm_device *dev = data;
 519         struct acpi_resource_extended_irq *irq;
 520         struct acpi_resource_gpio *gpio;
 521         struct acpi_resource_uart_serialbus *sb;
 522
 523         switch (ares->type) {
 524         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 525                 irq = &ares->data.extended_irq;
 526                 dev->irq_polarity = irq->polarity;
 527                 break;
 528
 529         case ACPI_RESOURCE_TYPE_GPIO:
 530                 gpio = &ares->data.gpio;
 531                 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
 532                         dev->irq_polarity = gpio->polarity;
 533                 break;
 534
 535         case ACPI_RESOURCE_TYPE_SERIAL_BUS:
 536                 sb = &ares->data.uart_serial_bus;
 537                 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART)
 538                         dev->init_speed = sb->default_baud_rate;
 539                 break;
 540
 541         default:
 542                 break;
 543         }
 544
 545         /* Always tell the ACPI core to skip this resource */
 546         return 1;
 547 }
 548
 549 static int bcm_acpi_probe(struct bcm_device *dev)
 550 {
 551         struct platform_device *pdev = dev->pdev;
 552         const struct acpi_device_id *id;
 553         struct acpi_device *adev;
 554         LIST_HEAD(resources);
 555         int ret;
 556
 557         id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
 558         if (!id)
 559                 return -ENODEV;
 560
 561         /* Retrieve GPIO data */
 562         dev->name = dev_name(&pdev->dev);
 563         ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
 564                                         acpi_bcm_default_gpios);
 565         if (ret)
 566                 return ret;
 567
 568         dev->clk = devm_clk_get(&pdev->dev, NULL);
 569
 570         dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev,
 571                                                      "device-wakeup",
 572                                                      GPIOD_OUT_LOW);
 573         if (IS_ERR(dev->device_wakeup))
 574                 return PTR_ERR(dev->device_wakeup);
 575
 576         dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown",
 577                                                 GPIOD_OUT_LOW);
 578         if (IS_ERR(dev->shutdown))
 579                 return PTR_ERR(dev->shutdown);
 580
 581         /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
 582         dev->irq = platform_get_irq(pdev, 0);
 583         if (dev->irq <= 0) {
 584                 struct gpio_desc *gpio;
 585
 586                 gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup",
 587                                                GPIOD_IN);
 588                 if (IS_ERR(gpio))
 589                         return PTR_ERR(gpio);
 590
 591                 dev->irq = gpiod_to_irq(gpio);
 592         }
 593
 594         dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq);
 595
 596         /* Make sure at-least one of the GPIO is defined and that
 597          * a name is specified for this instance
 598          */
 599         if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) {
 600                 dev_err(&pdev->dev, "invalid platform data\n");
 601                 return -EINVAL;
 602         }
 603
 604         /* Retrieve UART ACPI info */
 605         adev = ACPI_COMPANION(&dev->pdev->dev);
 606         if (!adev)
 607                 return 0;
 608
 609         acpi_dev_get_resources(adev, &resources, bcm_resource, dev);
 610
 611         return 0;
 612 }
 613 #else
 614 static int bcm_acpi_probe(struct bcm_device *dev)
 615 {
 616         return -EINVAL;
 617 }
 618 #endif /* CONFIG_ACPI */
 619
 620 static int bcm_probe(struct platform_device *pdev)
 621 {
 622         struct bcm_device *dev;
 623         struct acpi_device_id *pdata = pdev->dev.platform_data;
 624         int ret;
 625
 626         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 627         if (!dev)
 628                 return -ENOMEM;
 629
 630         dev->pdev = pdev;
 631
 632         if (ACPI_HANDLE(&pdev->dev)) {
 633                 ret = bcm_acpi_probe(dev);
 634                 if (ret)
 635                         return ret;
 636         } else if (pdata) {
 637                 dev->name = pdata->id;
 638         } else {
 639                 return -ENODEV;
 640         }
 641
 642         platform_set_drvdata(pdev, dev);
 643
 644         dev_info(&pdev->dev, "%s device registered.\n", dev->name);
 645
 646         /* Place this instance on the device list */
 647         mutex_lock(&bcm_device_lock);
 648         list_add_tail(&dev->list, &bcm_device_list);
 649         mutex_unlock(&bcm_device_lock);
 650
 651         bcm_gpio_set_power(dev, false);
 652
 653         return 0;
 654 }
 655
 656 static int bcm_remove(struct platform_device *pdev)
 657 {
 658         struct bcm_device *dev = platform_get_drvdata(pdev);
 659
 660         mutex_lock(&bcm_device_lock);
 661         list_del(&dev->list);
 662         mutex_unlock(&bcm_device_lock);
 663
 664         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev));
 665
 666         dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
 667
 668         return 0;
 669 }
 670
 671 static const struct hci_uart_proto bcm_proto = {
 672         .id             = HCI_UART_BCM,
 673         .name           = "BCM",
 674         .init_speed     = 115200,
 675         .oper_speed     = 4000000,
 676         .open           = bcm_open,
 677         .close          = bcm_close,
 678         .flush          = bcm_flush,
 679         .setup          = bcm_setup,
 680         .set_baudrate   = bcm_set_baudrate,
 681         .recv           = bcm_recv,
 682         .enqueue        = bcm_enqueue,
 683         .dequeue        = bcm_dequeue,
 684 };
 685
 686 #ifdef CONFIG_ACPI
 687 static const struct acpi_device_id bcm_acpi_match[] = {
 688         { "BCM2E39", 0 },
 689         { "BCM2E67", 0 },
 690         { },
 691 };
 692 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
 693 #endif
 694
 695 /* Platform suspend and resume callbacks */
 696 static SIMPLE_DEV_PM_OPS(bcm_pm_ops, bcm_suspend, bcm_resume);
 697
 698 static struct platform_driver bcm_driver = {
 699         .probe = bcm_probe,
 700         .remove = bcm_remove,
 701         .driver = {
 702                 .name = "hci_bcm",
 703                 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
 704                 .pm = &bcm_pm_ops,
 705         },
 706 };
 707
 708 int __init bcm_init(void)
 709 {
 710         platform_driver_register(&bcm_driver);
 711
 712         return hci_uart_register_proto(&bcm_proto);
 713 }
 714
 715 int __exit bcm_deinit(void)
 716 {
 717         platform_driver_unregister(&bcm_driver);
 718
 719         return hci_uart_unregister_proto(&bcm_proto);
 720 }