android_kernel_samsung_heroqlte/drivers/bluetooth/bcm4359.c

/*

 * Bluetooth Broadcom GPIO and Low Power Mode control

 *

 *  Copyright (C) 2011 Samsung Electronics Co., Ltd.

 *  Copyright (C) 2011 Google, Inc.

 *

 *  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

 *

 */



#define DEBUG



#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/gpio.h>

#include <linux/hrtimer.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/rfkill.h>

#include <linux/wakelock.h>

#include <linux/of_gpio.h>



#include <linux/gpio.h>

#include <linux/of_gpio.h>

#include <linux/of_irq.h>



#include <linux/slab.h>

#include <linux/pinctrl/consumer.h>





static struct rfkill *bt_rfkill;

static int cnt = 0;



struct bluetooth_bcm_platform_data {

   struct pinctrl *bt_pinctrl;

   //struct pinctrl_state *bt_state_default;



   /* Bluetooth reset gpio */

   int bt_gpio_bt_en;

};



static struct of_device_id bt_dt_match_table[] = {

	{	.compatible = "bcm,btdriver" },

	{}

};



static struct bluetooth_bcm_platform_data *bt_power_pdata = NULL;





static int bcm4359_bt_rfkill_set_power(void *data, bool blocked)

{

    if (!blocked) {

		pr_err("[BT] Bluetooth Power On (%d)\n", bt_power_pdata->bt_gpio_bt_en);



		gpio_set_value(bt_power_pdata->bt_gpio_bt_en, 1);



    } else {

        pr_err("[BT] Bluetooth Power Off.\n");



		gpio_set_value(bt_power_pdata->bt_gpio_bt_en, 0);

    }



    return 0;

}



static const struct rfkill_ops bcm4359_bt_rfkill_ops = {

    .set_block = bcm4359_bt_rfkill_set_power,

};



static int bt_populate_dt_pinfo(struct platform_device *pdev)

{

	pr_err("[BT] bcm4359 dt_info \n");



	if (!bt_power_pdata)

		return -ENOMEM;



	if (pdev->dev.of_node) {

		bt_power_pdata->bt_gpio_bt_en =

			of_get_named_gpio(pdev->dev.of_node,

						"bcm,bt-reset-gpio", 0);



		if (bt_power_pdata->bt_gpio_bt_en < 0) {

			pr_err("bt-reset-gpio not provided in device tree");

			return bt_power_pdata->bt_gpio_bt_en;

		}

		pr_err("[BT] bt_en pin is %d\n", bt_power_pdata->bt_gpio_bt_en);

	}

	return 0;

}





static int bcm4359_bluetooth_probe(struct platform_device *pdev)

{

    int rc = 0;

	int ret;



	pr_err("[BT] bcm4359_bluetooth_probe\n");



	if (!bt_power_pdata)

		bt_power_pdata =

				kzalloc(sizeof(struct bluetooth_bcm_platform_data),	GFP_KERNEL);



	if (!bt_power_pdata) {

		pr_err("Failed to allocate memory");

		return -ENOMEM;

	}



	if (pdev->dev.of_node) {

		ret = bt_populate_dt_pinfo(pdev);

		if (ret < 0) {

			pr_err("[BT] Failed to populate device tree info\n");

			return ret;

		}

		pdev->dev.platform_data = bt_power_pdata;



		bt_power_pdata->bt_pinctrl = devm_pinctrl_get(&pdev->dev);

		if (bt_power_pdata->bt_pinctrl <= 0) {

			pr_err("[BT] Failed to get pinctrl\n");

		} else {

			pr_err("[BT] bcm4359 Succ pinctrl\n");

		}

	}



	rc = gpio_request(bt_power_pdata->bt_gpio_bt_en, "bcm4359_bten_gpio");

    if (rc)

    {

        pr_err("[BT] %s: gpio_request for GPIO_BT_EN is failed", __func__);

        gpio_free(bt_power_pdata->bt_gpio_bt_en);

    }



    bt_rfkill = rfkill_alloc("bcm4359 Bluetooth", &pdev->dev,

                RFKILL_TYPE_BLUETOOTH, &bcm4359_bt_rfkill_ops,

                NULL);



    if (unlikely(!bt_rfkill)) {

        pr_err("[BT] bt_rfkill alloc failed.\n");

        return -ENOMEM;

    }



    rfkill_init_sw_state(bt_rfkill, 0);



    rc = rfkill_register(bt_rfkill);



    if (unlikely(rc)) {

        pr_err("[BT] bt_rfkill register failed.\n");

        rfkill_destroy(bt_rfkill);

        return rc;

    }



    rfkill_set_sw_state(bt_rfkill, true);



    return rc;

}



static int bcm4359_bluetooth_remove(struct platform_device *pdev)

{

    rfkill_unregister(bt_rfkill);

    rfkill_destroy(bt_rfkill);



    gpio_free(bt_power_pdata->bt_gpio_bt_en);



	cnt = 0;

    return 0;

}



static struct platform_driver bcm4359_bluetooth_platform_driver = {

    .probe = bcm4359_bluetooth_probe,

    .remove = bcm4359_bluetooth_remove,

    .driver = {

        .name = "bcm4359_bluetooth",

        .owner = THIS_MODULE,

        .of_match_table = bt_dt_match_table,

    },

};



static int __init bcm4359_bluetooth_init(void)

{

	int ret;



	pr_err("[BT] bcm4359_bluetooth_init\n");



    ret = platform_driver_register(&bcm4359_bluetooth_platform_driver);

	if (ret) {

		pr_err("[BT] bcm4359_bluetooth_init failed\n");

	}

	return ret;

}



static void __exit bcm4359_bluetooth_exit(void)

{

    platform_driver_unregister(&bcm4359_bluetooth_platform_driver);

}



module_init(bcm4359_bluetooth_init);

module_exit(bcm4359_bluetooth_exit);



MODULE_ALIAS("platform:bcm4359");

MODULE_DESCRIPTION("bcm4359_bluetooth");

MODULE_LICENSE("GPL");