[mirror_ubuntu-bionic-kernel.git] / drivers / bluetooth / hci_bcm.c

/*
 *
 *  Bluetooth HCI UART driver for Broadcom devices
 *
 *  Copyright (C) 2015  Intel Corporation
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
#include <linux/tty.h>
#include <linux/interrupt.h>
#include <linux/dmi.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "btbcm.h"
#include "hci_uart.h"

struct bcm_device {
	struct list_head	list;

	struct platform_device	*pdev;

	const char		*name;
	struct gpio_desc	*device_wakeup;
	struct gpio_desc	*shutdown;

	struct clk		*clk;
	bool			clk_enabled;

	u32			init_speed;
	int			irq;
	u8			irq_polarity;

#ifdef CONFIG_PM_SLEEP
	struct hci_uart		*hu;
	bool			is_suspended; /* suspend/resume flag */
#endif
};

struct bcm_data {
	struct sk_buff		*rx_skb;
	struct sk_buff_head	txq;

	struct bcm_device	*dev;
};

/* List of BCM BT UART devices */
static DEFINE_MUTEX(bcm_device_lock);
static LIST_HEAD(bcm_device_list);

static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
{
	struct hci_dev *hdev = hu->hdev;
	struct sk_buff *skb;
	struct bcm_update_uart_baud_rate param;

	if (speed > 3000000) {
		struct bcm_write_uart_clock_setting clock;

		clock.type = BCM_UART_CLOCK_48MHZ;

		bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);

		/* This Broadcom specific command changes the UART's controller
		 * clock for baud rate > 3000000.
		 */
		skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
		if (IS_ERR(skb)) {
			int err = PTR_ERR(skb);
			bt_dev_err(hdev, "BCM: failed to write clock (%d)",
				   err);
			return err;
		}

		kfree_skb(skb);
	}

	bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);

	param.zero = cpu_to_le16(0);
	param.baud_rate = cpu_to_le32(speed);

	/* This Broadcom specific command changes the UART's controller baud
	 * rate.
	 */
	skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
			     HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
		int err = PTR_ERR(skb);
		bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
			   err);
		return err;
	}

	kfree_skb(skb);

	return 0;
}

/* bcm_device_exists should be protected by bcm_device_lock */
static bool bcm_device_exists(struct bcm_device *device)
{
	struct list_head *p;

	list_for_each(p, &bcm_device_list) {
		struct bcm_device *dev = list_entry(p, struct bcm_device, list);

		if (device == dev)
			return true;
	}

	return false;
}

static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
{
	if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
		clk_enable(dev->clk);

	gpiod_set_value(dev->shutdown, powered);
	gpiod_set_value(dev->device_wakeup, powered);

	if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
		clk_disable(dev->clk);

	dev->clk_enabled = powered;

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static irqreturn_t bcm_host_wake(int irq, void *data)
{
	struct bcm_device *bdev = data;

	bt_dev_dbg(bdev, "Host wake IRQ");

	return IRQ_HANDLED;
}

static int bcm_request_irq(struct bcm_data *bcm)
{
	struct bcm_device *bdev = bcm->dev;
	int err = 0;

	/* If this is not a platform device, do not enable PM functionalities */
	mutex_lock(&bcm_device_lock);
	if (!bcm_device_exists(bdev)) {
		err = -ENODEV;
		goto unlock;
	}

	if (bdev->irq > 0) {
		err = devm_request_irq(&bdev->pdev->dev, bdev->irq,
				       bcm_host_wake, IRQF_TRIGGER_RISING,
				       "host_wake", bdev);
		if (err)
			goto unlock;

		device_init_wakeup(&bdev->pdev->dev, true);
	}

unlock:
	mutex_unlock(&bcm_device_lock);

	return err;
}

static const struct bcm_set_sleep_mode default_sleep_params = {
	.sleep_mode = 1,	/* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
	.idle_host = 2,		/* idle threshold HOST, in 300ms */
	.idle_dev = 2,		/* idle threshold device, in 300ms */
	.bt_wake_active = 1,	/* BT_WAKE active mode: 1 = high, 0 = low */
	.host_wake_active = 0,	/* HOST_WAKE active mode: 1 = high, 0 = low */
	.allow_host_sleep = 1,	/* Allow host sleep in SCO flag */
	.combine_modes = 0,	/* Combine sleep and LPM flag */
	.tristate_control = 0,	/* Allow tri-state control of UART tx flag */
	/* Irrelevant USB flags */
	.usb_auto_sleep = 0,
	.usb_resume_timeout = 0,
	.pulsed_host_wake = 0,
	.break_to_host = 0
};

static int bcm_setup_sleep(struct hci_uart *hu)
{
	struct bcm_data *bcm = hu->priv;
	struct sk_buff *skb;
	struct bcm_set_sleep_mode sleep_params = default_sleep_params;

	sleep_params.host_wake_active = !bcm->dev->irq_polarity;

	skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
			     &sleep_params, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
		int err = PTR_ERR(skb);
		bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
		return err;
	}
	kfree_skb(skb);

	bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");

	return 0;
}
#else
static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
#endif

static int bcm_open(struct hci_uart *hu)
{
	struct bcm_data *bcm;
	struct list_head *p;

	bt_dev_dbg(hu->hdev, "hu %p", hu);

	bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
	if (!bcm)
		return -ENOMEM;

	skb_queue_head_init(&bcm->txq);

	hu->priv = bcm;

	mutex_lock(&bcm_device_lock);
	list_for_each(p, &bcm_device_list) {
		struct bcm_device *dev = list_entry(p, struct bcm_device, list);

		/* Retrieve saved bcm_device based on parent of the
		 * platform device (saved during device probe) and
		 * parent of tty device used by hci_uart
		 */
		if (hu->tty->dev->parent == dev->pdev->dev.parent) {
			bcm->dev = dev;
			hu->init_speed = dev->init_speed;
#ifdef CONFIG_PM_SLEEP
			dev->hu = hu;
#endif
			bcm_gpio_set_power(bcm->dev, true);
			break;
		}
	}

	mutex_unlock(&bcm_device_lock);

	return 0;
}

static int bcm_close(struct hci_uart *hu)
{
	struct bcm_data *bcm = hu->priv;
	struct bcm_device *bdev = bcm->dev;

	bt_dev_dbg(hu->hdev, "hu %p", hu);

	/* Protect bcm->dev against removal of the device or driver */
	mutex_lock(&bcm_device_lock);
	if (bcm_device_exists(bdev)) {
		bcm_gpio_set_power(bdev, false);
#ifdef CONFIG_PM_SLEEP
		if (device_can_wakeup(&bdev->pdev->dev)) {
			devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
			device_init_wakeup(&bdev->pdev->dev, false);
		}

		bdev->hu = NULL;
#endif
	}
	mutex_unlock(&bcm_device_lock);

	skb_queue_purge(&bcm->txq);
	kfree_skb(bcm->rx_skb);
	kfree(bcm);

	hu->priv = NULL;
	return 0;
}

static int bcm_flush(struct hci_uart *hu)
{
	struct bcm_data *bcm = hu->priv;

	bt_dev_dbg(hu->hdev, "hu %p", hu);

	skb_queue_purge(&bcm->txq);

	return 0;
}

static int bcm_setup(struct hci_uart *hu)
{
	struct bcm_data *bcm = hu->priv;
	char fw_name[64];
	const struct firmware *fw;
	unsigned int speed;
	int err;

	bt_dev_dbg(hu->hdev, "hu %p", hu);

	hu->hdev->set_bdaddr = btbcm_set_bdaddr;

	err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name));
	if (err)
		return err;

	err = request_firmware(&fw, fw_name, &hu->hdev->dev);
	if (err < 0) {
		bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
		return 0;
	}

	err = btbcm_patchram(hu->hdev, fw);
	if (err) {
		bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
		goto finalize;
	}

	/* Init speed if any */
	if (hu->init_speed)
		speed = hu->init_speed;
	else if (hu->proto->init_speed)
		speed = hu->proto->init_speed;
	else
		speed = 0;

	if (speed)
		hci_uart_set_baudrate(hu, speed);

	/* Operational speed if any */
	if (hu->oper_speed)
		speed = hu->oper_speed;
	else if (hu->proto->oper_speed)
		speed = hu->proto->oper_speed;
	else
		speed = 0;

	if (speed) {
		err = bcm_set_baudrate(hu, speed);
		if (!err)
			hci_uart_set_baudrate(hu, speed);
	}

finalize:
	release_firmware(fw);

	err = btbcm_finalize(hu->hdev);
	if (err)
		return err;

	err = bcm_request_irq(bcm);
	if (!err)
		err = bcm_setup_sleep(hu);

	return err;
}

static const struct h4_recv_pkt bcm_recv_pkts[] = {
	{ H4_RECV_ACL,   .recv = hci_recv_frame },
	{ H4_RECV_SCO,   .recv = hci_recv_frame },
	{ H4_RECV_EVENT, .recv = hci_recv_frame },
};

static int bcm_recv(struct hci_uart *hu, const void *data, int count)
{
	struct bcm_data *bcm = hu->priv;

	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
		return -EUNATCH;

	bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
				  bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
	if (IS_ERR(bcm->rx_skb)) {
		int err = PTR_ERR(bcm->rx_skb);
		bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
		bcm->rx_skb = NULL;
		return err;
	}

	return count;
}

static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
{
	struct bcm_data *bcm = hu->priv;

	bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);

	/* Prepend skb with frame type */
	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
	skb_queue_tail(&bcm->txq, skb);

	return 0;
}

static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
{
	struct bcm_data *bcm = hu->priv;

	return skb_dequeue(&bcm->txq);
}

#ifdef CONFIG_PM_SLEEP
/* Platform suspend callback */
static int bcm_suspend(struct device *dev)
{
	struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
	int error;

	bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);

	mutex_lock(&bcm_device_lock);

	if (!bdev->hu)
		goto unlock;

	if (!bdev->is_suspended) {
		hci_uart_set_flow_control(bdev->hu, true);

		/* Once this callback returns, driver suspends BT via GPIO */
		bdev->is_suspended = true;
	}

	/* Suspend the device */
	if (bdev->device_wakeup) {
		gpiod_set_value(bdev->device_wakeup, false);
		bt_dev_dbg(bdev, "suspend, delaying 15 ms");
		mdelay(15);
	}

	if (device_may_wakeup(&bdev->pdev->dev)) {
		error = enable_irq_wake(bdev->irq);
		if (!error)
			bt_dev_dbg(bdev, "BCM irq: enabled");
	}

unlock:
	mutex_unlock(&bcm_device_lock);

	return 0;
}

/* Platform resume callback */
static int bcm_resume(struct device *dev)
{
	struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));

	bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);

	mutex_lock(&bcm_device_lock);

	if (!bdev->hu)
		goto unlock;

	if (device_may_wakeup(&bdev->pdev->dev)) {
		disable_irq_wake(bdev->irq);
		bt_dev_dbg(bdev, "BCM irq: disabled");
	}

	if (bdev->device_wakeup) {
		gpiod_set_value(bdev->device_wakeup, true);
		bt_dev_dbg(bdev, "resume, delaying 15 ms");
		mdelay(15);
	}

	/* When this callback executes, the device has woken up already */
	if (bdev->is_suspended) {
		bdev->is_suspended = false;

		hci_uart_set_flow_control(bdev->hu, false);
	}

unlock:
	mutex_unlock(&bcm_device_lock);

	return 0;
}
#endif

static const struct acpi_gpio_params device_wakeup_gpios = { 0, 0, false };
static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false };
static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false };

static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
	{ "device-wakeup-gpios", &device_wakeup_gpios, 1 },
	{ "shutdown-gpios", &shutdown_gpios, 1 },
	{ "host-wakeup-gpios", &host_wakeup_gpios, 1 },
	{ },
};

#ifdef CONFIG_ACPI
static u8 acpi_active_low = ACPI_ACTIVE_LOW;

/* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = {
	{
		.ident = "Asus T100TA",
		.matches = {
			DMI_EXACT_MATCH(DMI_SYS_VENDOR,
					"ASUSTeK COMPUTER INC."),
			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
		},
		.driver_data = &acpi_active_low,
	},
	{ }
};

static int bcm_resource(struct acpi_resource *ares, void *data)
{
	struct bcm_device *dev = data;
	struct acpi_resource_extended_irq *irq;
	struct acpi_resource_gpio *gpio;
	struct acpi_resource_uart_serialbus *sb;

	switch (ares->type) {
	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
		irq = &ares->data.extended_irq;
		dev->irq_polarity = irq->polarity;
		break;

	case ACPI_RESOURCE_TYPE_GPIO:
		gpio = &ares->data.gpio;
		if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
			dev->irq_polarity = gpio->polarity;
		break;

	case ACPI_RESOURCE_TYPE_SERIAL_BUS:
		sb = &ares->data.uart_serial_bus;
		if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART)
			dev->init_speed = sb->default_baud_rate;
		break;

	default:
		break;
	}

	/* Always tell the ACPI core to skip this resource */
	return 1;
}

static int bcm_acpi_probe(struct bcm_device *dev)
{
	struct platform_device *pdev = dev->pdev;
	const struct acpi_device_id *id;
	struct acpi_device *adev;
	LIST_HEAD(resources);
	const struct dmi_system_id *dmi_id;
	int ret;

	id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
	if (!id)
		return -ENODEV;

	/* Retrieve GPIO data */
	dev->name = dev_name(&pdev->dev);
	ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
					acpi_bcm_default_gpios);
	if (ret)
		return ret;

	dev->clk = devm_clk_get(&pdev->dev, NULL);

	dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev,
						     "device-wakeup",
						     GPIOD_OUT_LOW);
	if (IS_ERR(dev->device_wakeup))
		return PTR_ERR(dev->device_wakeup);

	dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown",
						GPIOD_OUT_LOW);
	if (IS_ERR(dev->shutdown))
		return PTR_ERR(dev->shutdown);

	/* IRQ can be declared in ACPI table as Interrupt or GpioInt */
	dev->irq = platform_get_irq(pdev, 0);
	if (dev->irq <= 0) {
		struct gpio_desc *gpio;

		gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup",
					       GPIOD_IN);
		if (IS_ERR(gpio))
			return PTR_ERR(gpio);

		dev->irq = gpiod_to_irq(gpio);
	}

	dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq);

	/* Make sure at-least one of the GPIO is defined and that
	 * a name is specified for this instance
	 */
	if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) {
		dev_err(&pdev->dev, "invalid platform data\n");
		return -EINVAL;
	}

	/* Retrieve UART ACPI info */
	adev = ACPI_COMPANION(&dev->pdev->dev);
	if (!adev)
		return 0;

	acpi_dev_get_resources(adev, &resources, bcm_resource, dev);

	dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table);
	if (dmi_id) {
		bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low",
			    dmi_id->ident);
		dev->irq_polarity = *(u8 *)dmi_id->driver_data;
	}

	return 0;
}
#else
static int bcm_acpi_probe(struct bcm_device *dev)
{
	return -EINVAL;
}
#endif /* CONFIG_ACPI */

static int bcm_probe(struct platform_device *pdev)
{
	struct bcm_device *dev;
	struct acpi_device_id *pdata = pdev->dev.platform_data;
	int ret;

	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;

	dev->pdev = pdev;

	if (ACPI_HANDLE(&pdev->dev)) {
		ret = bcm_acpi_probe(dev);
		if (ret)
			return ret;
	} else if (pdata) {
		dev->name = pdata->id;
	} else {
		return -ENODEV;
	}

	platform_set_drvdata(pdev, dev);

	dev_info(&pdev->dev, "%s device registered.\n", dev->name);

	/* Place this instance on the device list */
	mutex_lock(&bcm_device_lock);
	list_add_tail(&dev->list, &bcm_device_list);
	mutex_unlock(&bcm_device_lock);

	bcm_gpio_set_power(dev, false);

	return 0;
}

static int bcm_remove(struct platform_device *pdev)
{
	struct bcm_device *dev = platform_get_drvdata(pdev);

	mutex_lock(&bcm_device_lock);
	list_del(&dev->list);
	mutex_unlock(&bcm_device_lock);

	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev));

	dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);

	return 0;
}

static const struct hci_uart_proto bcm_proto = {
	.id		= HCI_UART_BCM,
	.name		= "BCM",
	.init_speed	= 115200,
	.oper_speed	= 4000000,
	.open		= bcm_open,
	.close		= bcm_close,
	.flush		= bcm_flush,
	.setup		= bcm_setup,
	.set_baudrate	= bcm_set_baudrate,
	.recv		= bcm_recv,
	.enqueue	= bcm_enqueue,
	.dequeue	= bcm_dequeue,
};

#ifdef CONFIG_ACPI
static const struct acpi_device_id bcm_acpi_match[] = {
	{ "BCM2E39", 0 },
	{ "BCM2E67", 0 },
	{ },
};
MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
#endif

/* Platform suspend and resume callbacks */
static SIMPLE_DEV_PM_OPS(bcm_pm_ops, bcm_suspend, bcm_resume);

static struct platform_driver bcm_driver = {
	.probe = bcm_probe,
	.remove = bcm_remove,
	.driver = {
		.name = "hci_bcm",
		.acpi_match_table = ACPI_PTR(bcm_acpi_match),
		.pm = &bcm_pm_ops,
	},
};

int __init bcm_init(void)
{
	platform_driver_register(&bcm_driver);

	return hci_uart_register_proto(&bcm_proto);
}

int __exit bcm_deinit(void)
{
	platform_driver_unregister(&bcm_driver);

	return hci_uart_unregister_proto(&bcm_proto);
}
Commit	Line	Data
e9a2dd26 MH	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>
18aeb444	27	#include <linux/firmware.h>
0395ffc1 FD	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>
6cc4396c	34	#include <linux/interrupt.h>
5cebdfea	35	#include <linux/dmi.h>
e9a2dd26 MH	36
	37	#include <net/bluetooth/bluetooth.h>
	38	#include <net/bluetooth/hci_core.h>
	39
bdd8818e	40	#include "btbcm.h"
e9a2dd26	41	#include "hci_uart.h"
bdd8818e	42
0395ffc1 FD	43	struct bcm_device {
	44	struct list_head list;
	45
	46	struct platform_device *pdev;
	47
	48	const char *name;
	49	struct gpio_desc *device_wakeup;
	50	struct gpio_desc *shutdown;
	51
	52	struct clk *clk;
	53	bool clk_enabled;
ae056908 FD	54
ae056908 FD	55	u32 init_speed;
6cc4396c FD	56	int irq;
6cc4396c FD	57	u8 irq_polarity;
118612fb FD	58
	59	#ifdef CONFIG_PM_SLEEP
	60	struct hci_uart *hu;
	61	bool is_suspended; /* suspend/resume flag */
	62	#endif
0395ffc1 FD	63	};
0395ffc1 FD	64
bdd8818e	65	struct bcm_data {
0395ffc1 FD	66	struct sk_buff *rx_skb;
	67	struct sk_buff_head txq;
	68
	69	struct bcm_device *dev;
bdd8818e MH	70	};
bdd8818e MH	71
0395ffc1	72	/* List of BCM BT UART devices */
bb3ea16a	73	static DEFINE_MUTEX(bcm_device_lock);
0395ffc1 FD	74	static LIST_HEAD(bcm_device_list);
0395ffc1 FD	75
61b2fc2b FD	76	static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
	77	{
	78	struct hci_dev *hdev = hu->hdev;
	79	struct sk_buff *skb;
	80	struct bcm_update_uart_baud_rate param;
	81
	82	if (speed > 3000000) {
	83	struct bcm_write_uart_clock_setting clock;
	84
	85	clock.type = BCM_UART_CLOCK_48MHZ;
	86
65ad07c9	87	bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
61b2fc2b FD	88
	89	/* This Broadcom specific command changes the UART's controller
	90	* clock for baud rate > 3000000.
	91	*/
	92	skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
	93	if (IS_ERR(skb)) {
	94	int err = PTR_ERR(skb);
65ad07c9 FD	95	bt_dev_err(hdev, "BCM: failed to write clock (%d)",
65ad07c9 FD	96	err);
61b2fc2b FD	97	return err;
	98	}
	99
	100	kfree_skb(skb);
	101	}
	102
65ad07c9	103	bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
61b2fc2b FD	104
	105	param.zero = cpu_to_le16(0);
	106	param.baud_rate = cpu_to_le32(speed);
	107
	108	/* This Broadcom specific command changes the UART's controller baud
	109	* rate.
	110	*/
	111	skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
	112	HCI_INIT_TIMEOUT);
	113	if (IS_ERR(skb)) {
	114	int err = PTR_ERR(skb);
65ad07c9 FD	115	bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
65ad07c9 FD	116	err);
61b2fc2b FD	117	return err;
	118	}
	119
	120	kfree_skb(skb);
	121
	122	return 0;
	123	}
	124
917522aa	125	/* bcm_device_exists should be protected by bcm_device_lock */
0395ffc1 FD	126	static bool bcm_device_exists(struct bcm_device *device)
	127	{
	128	struct list_head *p;
	129
	130	list_for_each(p, &bcm_device_list) {
	131	struct bcm_device *dev = list_entry(p, struct bcm_device, list);
	132
	133	if (device == dev)
	134	return true;
	135	}
	136
	137	return false;
	138	}
	139
	140	static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
	141	{
	142	if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
	143	clk_enable(dev->clk);
	144
2af0a709 LP	145	gpiod_set_value(dev->shutdown, powered);
2af0a709 LP	146	gpiod_set_value(dev->device_wakeup, powered);
0395ffc1 FD	147
	148	if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
	149	clk_disable(dev->clk);
	150
	151	dev->clk_enabled = powered;
	152
	153	return 0;
	154	}
	155
6cc4396c FD	156	#ifdef CONFIG_PM_SLEEP
	157	static irqreturn_t bcm_host_wake(int irq, void *data)
	158	{
	159	struct bcm_device *bdev = data;
	160
	161	bt_dev_dbg(bdev, "Host wake IRQ");
	162
	163	return IRQ_HANDLED;
	164	}
	165
	166	static int bcm_request_irq(struct bcm_data *bcm)
	167	{
	168	struct bcm_device *bdev = bcm->dev;
	169	int err = 0;
	170
	171	/* If this is not a platform device, do not enable PM functionalities */
	172	mutex_lock(&bcm_device_lock);
	173	if (!bcm_device_exists(bdev)) {
	174	err = -ENODEV;
	175	goto unlock;
	176	}
	177
	178	if (bdev->irq > 0) {
	179	err = devm_request_irq(&bdev->pdev->dev, bdev->irq,
	180	bcm_host_wake, IRQF_TRIGGER_RISING,
	181	"host_wake", bdev);
	182	if (err)
	183	goto unlock;
	184
	185	device_init_wakeup(&bdev->pdev->dev, true);
	186	}
	187
	188	unlock:
	189	mutex_unlock(&bcm_device_lock);
	190
	191	return err;
	192	}
	193
	194	static const struct bcm_set_sleep_mode default_sleep_params = {
	195	.sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
	196	.idle_host = 2, /* idle threshold HOST, in 300ms */
	197	.idle_dev = 2, /* idle threshold device, in 300ms */
	198	.bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
	199	.host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
	200	.allow_host_sleep = 1, /* Allow host sleep in SCO flag */
	201	.combine_modes = 0, /* Combine sleep and LPM flag */
	202	.tristate_control = 0, /* Allow tri-state control of UART tx flag */
	203	/* Irrelevant USB flags */
	204	.usb_auto_sleep = 0,
	205	.usb_resume_timeout = 0,
	206	.pulsed_host_wake = 0,
	207	.break_to_host = 0
	208	};
	209
	210	static int bcm_setup_sleep(struct hci_uart *hu)
	211	{
	212	struct bcm_data *bcm = hu->priv;
	213	struct sk_buff *skb;
	214	struct bcm_set_sleep_mode sleep_params = default_sleep_params;
	215
	216	sleep_params.host_wake_active = !bcm->dev->irq_polarity;
	217
	218	skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
	219	&sleep_params, HCI_INIT_TIMEOUT);
220	if (IS_ERR(skb)) {
221	int err = PTR_ERR(skb);
222	bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
223	return err;
224	}
225	kfree_skb(skb);
226
227	bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
228
229	return 0;
230	}
231	#else
232	static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
233	static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
234	#endif
235
bdd8818e MH	236	static int bcm_open(struct hci_uart *hu)
	237	{
	238	struct bcm_data *bcm;
0395ffc1	239	struct list_head *p;
bdd8818e	240
65ad07c9	241	bt_dev_dbg(hu->hdev, "hu %p", hu);
bdd8818e MH	242
	243	bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
	244	if (!bcm)
	245	return -ENOMEM;
	246
	247	skb_queue_head_init(&bcm->txq);
	248
	249	hu->priv = bcm;
0395ffc1	250
bb3ea16a	251	mutex_lock(&bcm_device_lock);
0395ffc1 FD	252	list_for_each(p, &bcm_device_list) {
	253	struct bcm_device *dev = list_entry(p, struct bcm_device, list);
	254
	255	/* Retrieve saved bcm_device based on parent of the
	256	* platform device (saved during device probe) and
	257	* parent of tty device used by hci_uart
	258	*/
	259	if (hu->tty->dev->parent == dev->pdev->dev.parent) {
	260	bcm->dev = dev;
ae056908	261	hu->init_speed = dev->init_speed;
118612fb FD	262	#ifdef CONFIG_PM_SLEEP
	263	dev->hu = hu;
	264	#endif
6cc4396c	265	bcm_gpio_set_power(bcm->dev, true);
0395ffc1 FD	266	break;
	267	}
	268	}
	269
bb3ea16a	270	mutex_unlock(&bcm_device_lock);
0395ffc1	271
bdd8818e MH	272	return 0;
	273	}
	274
	275	static int bcm_close(struct hci_uart *hu)
	276	{
	277	struct bcm_data *bcm = hu->priv;
6cc4396c	278	struct bcm_device *bdev = bcm->dev;
bdd8818e	279
65ad07c9	280	bt_dev_dbg(hu->hdev, "hu %p", hu);
bdd8818e	281
0395ffc1	282	/* Protect bcm->dev against removal of the device or driver */
bb3ea16a	283	mutex_lock(&bcm_device_lock);
6cc4396c FD	284	if (bcm_device_exists(bdev)) {
6cc4396c FD	285	bcm_gpio_set_power(bdev, false);
118612fb	286	#ifdef CONFIG_PM_SLEEP
6cc4396c FD	287	if (device_can_wakeup(&bdev->pdev->dev)) {
	288	devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
	289	device_init_wakeup(&bdev->pdev->dev, false);
	290	}
	291
	292	bdev->hu = NULL;
118612fb FD	293	#endif
118612fb FD	294	}
bb3ea16a	295	mutex_unlock(&bcm_device_lock);
0395ffc1	296
bdd8818e MH	297	skb_queue_purge(&bcm->txq);
	298	kfree_skb(bcm->rx_skb);
	299	kfree(bcm);
	300
	301	hu->priv = NULL;
	302	return 0;
	303	}
	304
	305	static int bcm_flush(struct hci_uart *hu)
	306	{
	307	struct bcm_data *bcm = hu->priv;
	308
65ad07c9	309	bt_dev_dbg(hu->hdev, "hu %p", hu);
bdd8818e MH	310
	311	skb_queue_purge(&bcm->txq);
	312
	313	return 0;
	314	}
	315
	316	static int bcm_setup(struct hci_uart *hu)
	317	{
6cc4396c	318	struct bcm_data *bcm = hu->priv;
6be09b48 FD	319	char fw_name[64];
6be09b48 FD	320	const struct firmware *fw;
960ef1d7	321	unsigned int speed;
6be09b48 FD	322	int err;
6be09b48 FD	323
65ad07c9	324	bt_dev_dbg(hu->hdev, "hu %p", hu);
bdd8818e MH	325
	326	hu->hdev->set_bdaddr = btbcm_set_bdaddr;
	327
6be09b48 FD	328	err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name));
	329	if (err)
	330	return err;
	331
	332	err = request_firmware(&fw, fw_name, &hu->hdev->dev);
	333	if (err < 0) {
65ad07c9	334	bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
6be09b48 FD	335	return 0;
	336	}
	337
	338	err = btbcm_patchram(hu->hdev, fw);
	339	if (err) {
65ad07c9	340	bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
6be09b48 FD	341	goto finalize;
	342	}
	343
960ef1d7 FD	344	/* Init speed if any */
	345	if (hu->init_speed)
	346	speed = hu->init_speed;
	347	else if (hu->proto->init_speed)
	348	speed = hu->proto->init_speed;
	349	else
	350	speed = 0;
	351
	352	if (speed)
	353	hci_uart_set_baudrate(hu, speed);
	354
	355	/* Operational speed if any */
	356	if (hu->oper_speed)
	357	speed = hu->oper_speed;
	358	else if (hu->proto->oper_speed)
	359	speed = hu->proto->oper_speed;
	360	else
	361	speed = 0;
	362
	363	if (speed) {
	364	err = bcm_set_baudrate(hu, speed);
61b2fc2b	365	if (!err)
960ef1d7	366	hci_uart_set_baudrate(hu, speed);
61b2fc2b FD	367	}
61b2fc2b FD	368
6be09b48 FD	369	finalize:
	370	release_firmware(fw);
	371
	372	err = btbcm_finalize(hu->hdev);
6cc4396c FD	373	if (err)
	374	return err;
	375
	376	err = bcm_request_irq(bcm);
	377	if (!err)
	378	err = bcm_setup_sleep(hu);
6be09b48 FD	379
6be09b48 FD	380	return err;
bdd8818e MH	381	}
bdd8818e MH	382
79b8df93 MH	383	static const struct h4_recv_pkt bcm_recv_pkts[] = {
	384	{ H4_RECV_ACL, .recv = hci_recv_frame },
	385	{ H4_RECV_SCO, .recv = hci_recv_frame },
	386	{ H4_RECV_EVENT, .recv = hci_recv_frame },
	387	};
	388
bdd8818e MH	389	static int bcm_recv(struct hci_uart hu, const void data, int count)
	390	{
	391	struct bcm_data *bcm = hu->priv;
	392
	393	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
	394	return -EUNATCH;
	395
79b8df93 MH	396	bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
79b8df93 MH	397	bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
bdd8818e MH	398	if (IS_ERR(bcm->rx_skb)) {
bdd8818e MH	399	int err = PTR_ERR(bcm->rx_skb);
65ad07c9	400	bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
37134167	401	bcm->rx_skb = NULL;
bdd8818e MH	402	return err;
	403	}
	404
	405	return count;
	406	}
	407
	408	static int bcm_enqueue(struct hci_uart hu, struct sk_buff skb)
	409	{
	410	struct bcm_data *bcm = hu->priv;
	411
65ad07c9	412	bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
bdd8818e MH	413
	414	/* Prepend skb with frame type */
	415	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
	416	skb_queue_tail(&bcm->txq, skb);
	417
	418	return 0;
	419	}
	420
	421	static struct sk_buff bcm_dequeue(struct hci_uart hu)
	422	{
	423	struct bcm_data *bcm = hu->priv;
	424
	425	return skb_dequeue(&bcm->txq);
	426	}
	427
118612fb FD	428	#ifdef CONFIG_PM_SLEEP
	429	/* Platform suspend callback */
	430	static int bcm_suspend(struct device *dev)
	431	{
	432	struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
6cc4396c	433	int error;
118612fb	434
65ad07c9	435	bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
118612fb	436
bb3ea16a	437	mutex_lock(&bcm_device_lock);
917522aa FD	438
	439	if (!bdev->hu)
	440	goto unlock;
	441
118612fb FD	442	if (!bdev->is_suspended) {
	443	hci_uart_set_flow_control(bdev->hu, true);
	444
	445	/* Once this callback returns, driver suspends BT via GPIO */
	446	bdev->is_suspended = true;
	447	}
	448
	449	/* Suspend the device */
	450	if (bdev->device_wakeup) {
	451	gpiod_set_value(bdev->device_wakeup, false);
65ad07c9	452	bt_dev_dbg(bdev, "suspend, delaying 15 ms");
118612fb FD	453	mdelay(15);
	454	}
	455
6cc4396c FD	456	if (device_may_wakeup(&bdev->pdev->dev)) {
	457	error = enable_irq_wake(bdev->irq);
	458	if (!error)
	459	bt_dev_dbg(bdev, "BCM irq: enabled");
	460	}
	461
917522aa	462	unlock:
bb3ea16a	463	mutex_unlock(&bcm_device_lock);
917522aa	464
118612fb FD	465	return 0;
	466	}
	467
	468	/* Platform resume callback */
	469	static int bcm_resume(struct device *dev)
	470	{
	471	struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
	472
65ad07c9	473	bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
118612fb	474
bb3ea16a	475	mutex_lock(&bcm_device_lock);
917522aa FD	476
	477	if (!bdev->hu)
	478	goto unlock;
	479
6cc4396c FD	480	if (device_may_wakeup(&bdev->pdev->dev)) {
	481	disable_irq_wake(bdev->irq);
	482	bt_dev_dbg(bdev, "BCM irq: disabled");
	483	}
	484
118612fb FD	485	if (bdev->device_wakeup) {
118612fb FD	486	gpiod_set_value(bdev->device_wakeup, true);
65ad07c9	487	bt_dev_dbg(bdev, "resume, delaying 15 ms");
118612fb FD	488	mdelay(15);
	489	}
	490
	491	/* When this callback executes, the device has woken up already */
	492	if (bdev->is_suspended) {
	493	bdev->is_suspended = false;
	494
	495	hci_uart_set_flow_control(bdev->hu, false);
	496	}
	497
917522aa	498	unlock:
bb3ea16a	499	mutex_unlock(&bcm_device_lock);
917522aa	500
118612fb FD	501	return 0;
	502	}
	503	#endif
	504
0395ffc1 FD	505	static const struct acpi_gpio_params device_wakeup_gpios = { 0, 0, false };
0395ffc1 FD	506	static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false };
6cc4396c	507	static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false };
0395ffc1 FD	508
	509	static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
	510	{ "device-wakeup-gpios", &device_wakeup_gpios, 1 },
	511	{ "shutdown-gpios", &shutdown_gpios, 1 },
6cc4396c	512	{ "host-wakeup-gpios", &host_wakeup_gpios, 1 },
0395ffc1 FD	513	{ },
	514	};
	515
50d78bcf	516	#ifdef CONFIG_ACPI
5cebdfea FD	517	static u8 acpi_active_low = ACPI_ACTIVE_LOW;
	518
	519	/* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
	520	static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = {
	521	{
	522	.ident = "Asus T100TA",
	523	.matches = {
	524	DMI_EXACT_MATCH(DMI_SYS_VENDOR,
	525	"ASUSTeK COMPUTER INC."),
	526	DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
	527	},
	528	.driver_data = &acpi_active_low,
	529	},
	530	{ }
	531	};
	532
ae056908 FD	533	static int bcm_resource(struct acpi_resource ares, void data)
	534	{
	535	struct bcm_device *dev = data;
6cc4396c FD	536	struct acpi_resource_extended_irq *irq;
	537	struct acpi_resource_gpio *gpio;
	538	struct acpi_resource_uart_serialbus *sb;
	539
	540	switch (ares->type) {
	541	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
	542	irq = &ares->data.extended_irq;
	543	dev->irq_polarity = irq->polarity;
	544	break;
	545
	546	case ACPI_RESOURCE_TYPE_GPIO:
	547	gpio = &ares->data.gpio;
	548	if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
	549	dev->irq_polarity = gpio->polarity;
	550	break;
	551
	552	case ACPI_RESOURCE_TYPE_SERIAL_BUS:
ae056908 FD	553	sb = &ares->data.uart_serial_bus;
	554	if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART)
	555	dev->init_speed = sb->default_baud_rate;
6cc4396c FD	556	break;
	557
	558	default:
	559	break;
ae056908 FD	560	}
	561
	562	/* Always tell the ACPI core to skip this resource */
	563	return 1;
	564	}
	565
0395ffc1 FD	566	static int bcm_acpi_probe(struct bcm_device *dev)
	567	{
	568	struct platform_device *pdev = dev->pdev;
	569	const struct acpi_device_id *id;
ae056908 FD	570	struct acpi_device *adev;
ae056908 FD	571	LIST_HEAD(resources);
5cebdfea	572	const struct dmi_system_id *dmi_id;
0395ffc1 FD	573	int ret;
	574
	575	id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
	576	if (!id)
	577	return -ENODEV;
	578
	579	/* Retrieve GPIO data */
	580	dev->name = dev_name(&pdev->dev);
	581	ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
	582	acpi_bcm_default_gpios);
	583	if (ret)
	584	return ret;
	585
	586	dev->clk = devm_clk_get(&pdev->dev, NULL);
	587
62aaefa7 UKK	588	dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev,
	589	"device-wakeup",
	590	GPIOD_OUT_LOW);
	591	if (IS_ERR(dev->device_wakeup))
	592	return PTR_ERR(dev->device_wakeup);
0395ffc1	593
62aaefa7 UKK	594	dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown",
	595	GPIOD_OUT_LOW);
	596	if (IS_ERR(dev->shutdown))
	597	return PTR_ERR(dev->shutdown);
0395ffc1	598
6cc4396c FD	599	/* IRQ can be declared in ACPI table as Interrupt or GpioInt */
	600	dev->irq = platform_get_irq(pdev, 0);
	601	if (dev->irq <= 0) {
	602	struct gpio_desc *gpio;
	603
	604	gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup",
	605	GPIOD_IN);
	606	if (IS_ERR(gpio))
	607	return PTR_ERR(gpio);
	608
	609	dev->irq = gpiod_to_irq(gpio);
	610	}
	611
	612	dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq);
	613
0395ffc1 FD	614	/* Make sure at-least one of the GPIO is defined and that
	615	* a name is specified for this instance
	616	*/
	617	if ((!dev->device_wakeup && !dev->shutdown) \|\| !dev->name) {
	618	dev_err(&pdev->dev, "invalid platform data\n");
	619	return -EINVAL;
	620	}
	621
ae056908 FD	622	/* Retrieve UART ACPI info */
	623	adev = ACPI_COMPANION(&dev->pdev->dev);
	624	if (!adev)
	625	return 0;
	626
	627	acpi_dev_get_resources(adev, &resources, bcm_resource, dev);
	628
5cebdfea FD	629	dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table);
	630	if (dmi_id) {
	631	bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low",
	632	dmi_id->ident);
	633	dev->irq_polarity = (u8 )dmi_id->driver_data;
	634	}
	635
0395ffc1 FD	636	return 0;
0395ffc1 FD	637	}
50d78bcf FD	638	#else
	639	static int bcm_acpi_probe(struct bcm_device *dev)
	640	{
	641	return -EINVAL;
	642	}
	643	#endif /* CONFIG_ACPI */
0395ffc1 FD	644
	645	static int bcm_probe(struct platform_device *pdev)
	646	{
	647	struct bcm_device *dev;
	648	struct acpi_device_id *pdata = pdev->dev.platform_data;
	649	int ret;
	650
	651	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
	652	if (!dev)
	653	return -ENOMEM;
	654
	655	dev->pdev = pdev;
	656
	657	if (ACPI_HANDLE(&pdev->dev)) {
	658	ret = bcm_acpi_probe(dev);
	659	if (ret)
	660	return ret;
	661	} else if (pdata) {
	662	dev->name = pdata->id;
	663	} else {
	664	return -ENODEV;
	665	}
	666
	667	platform_set_drvdata(pdev, dev);
	668
	669	dev_info(&pdev->dev, "%s device registered.\n", dev->name);
	670
	671	/* Place this instance on the device list */
bb3ea16a	672	mutex_lock(&bcm_device_lock);
0395ffc1	673	list_add_tail(&dev->list, &bcm_device_list);
bb3ea16a	674	mutex_unlock(&bcm_device_lock);
0395ffc1 FD	675
	676	bcm_gpio_set_power(dev, false);
	677
	678	return 0;
	679	}
	680
	681	static int bcm_remove(struct platform_device *pdev)
	682	{
	683	struct bcm_device *dev = platform_get_drvdata(pdev);
	684
bb3ea16a	685	mutex_lock(&bcm_device_lock);
0395ffc1	686	list_del(&dev->list);
bb3ea16a	687	mutex_unlock(&bcm_device_lock);
0395ffc1 FD	688
	689	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev));
	690
	691	dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
	692
	693	return 0;
	694	}
	695
bdd8818e MH	696	static const struct hci_uart_proto bcm_proto = {
	697	.id = HCI_UART_BCM,
	698	.name = "BCM",
61b2fc2b FD	699	.init_speed = 115200,
61b2fc2b FD	700	.oper_speed = 4000000,
bdd8818e MH	701	.open = bcm_open,
	702	.close = bcm_close,
	703	.flush = bcm_flush,
	704	.setup = bcm_setup,
61b2fc2b	705	.set_baudrate = bcm_set_baudrate,
bdd8818e MH	706	.recv = bcm_recv,
	707	.enqueue = bcm_enqueue,
	708	.dequeue = bcm_dequeue,
	709	};
	710
0395ffc1 FD	711	#ifdef CONFIG_ACPI
	712	static const struct acpi_device_id bcm_acpi_match[] = {
	713	{ "BCM2E39", 0 },
	714	{ "BCM2E67", 0 },
	715	{ },
	716	};
	717	MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
	718	#endif
	719
118612fb FD	720	/* Platform suspend and resume callbacks */
	721	static SIMPLE_DEV_PM_OPS(bcm_pm_ops, bcm_suspend, bcm_resume);
	722
0395ffc1 FD	723	static struct platform_driver bcm_driver = {
	724	.probe = bcm_probe,
	725	.remove = bcm_remove,
	726	.driver = {
	727	.name = "hci_bcm",
	728	.acpi_match_table = ACPI_PTR(bcm_acpi_match),
118612fb	729	.pm = &bcm_pm_ops,
0395ffc1 FD	730	},
	731	};
	732
bdd8818e MH	733	int __init bcm_init(void)
bdd8818e MH	734	{
0395ffc1 FD	735	platform_driver_register(&bcm_driver);
0395ffc1 FD	736
bdd8818e MH	737	return hci_uart_register_proto(&bcm_proto);
	738	}
	739
	740	int __exit bcm_deinit(void)
	741	{
0395ffc1 FD	742	platform_driver_unregister(&bcm_driver);
0395ffc1 FD	743
bdd8818e MH	744	return hci_uart_unregister_proto(&bcm_proto);
bdd8818e MH	745	}