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/*
* Bluetooth+WiFi Murata LBEE19QMBC rfkill power control via GPIO
*
* Copyright (C) 2010 NVIDIA 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/module.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/rfkill.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <linux/platform_device.h>
#include <linux/lbee9qmb-rfkill.h>
static int lbee9qmb_rfkill_set_power(void *data, bool blocked)
{
struct platform_device *pdev = data;
struct lbee9qmb_platform_data *plat = pdev->dev.platform_data;
struct regulator *regulator;
regulator = regulator_get(&pdev->dev, "Vdd");
if (IS_ERR(regulator)) {
dev_err(&pdev->dev, "Unable to get regulator Vdd\n");
return PTR_ERR(regulator);
}
if (!blocked) {
regulator_enable(regulator);
gpio_set_value(plat->gpio_reset, 0);
if (plat->gpio_pwr!=-1)
gpio_set_value(plat->gpio_pwr, 0);
msleep(plat->delay);
if (plat->gpio_pwr!=-1)
gpio_set_value(plat->gpio_pwr, 1);
gpio_set_value(plat->gpio_reset, 1);
} else {
gpio_set_value(plat->gpio_reset, 0);
regulator_disable(regulator);
}
regulator_put(regulator);
return 0;
}
static struct rfkill_ops lbee9qmb_rfkill_ops = {
.set_block = lbee9qmb_rfkill_set_power,
};
static int lbee9qmb_rfkill_probe(struct platform_device *pdev)
{
struct lbee9qmb_platform_data *plat = pdev->dev.platform_data;
struct rfkill *rfkill;
int rc;
if (!plat) {
dev_err(&pdev->dev, "no platform data\n");
return -ENOSYS;
}
rc = gpio_request(plat->gpio_reset, "lbee9qmb_reset");
if (rc < 0) {
dev_err(&pdev->dev, "gpio_request failed\n");
return rc;
}
if (plat->gpio_pwr!=-1)
{
rc = gpio_request(plat->gpio_pwr, "lbee9qmb_pwr");
gpio_direction_output(plat->gpio_pwr,0);
}
rfkill = rfkill_alloc("lbee9qmb-rfkill", &pdev->dev,
RFKILL_TYPE_BLUETOOTH, &lbee9qmb_rfkill_ops, pdev);
if (!rfkill) {
rc = -ENOMEM;
goto fail_gpio;
}
platform_set_drvdata(pdev, rfkill);
gpio_direction_output(plat->gpio_reset, 0);
rc = rfkill_register(rfkill);
if (rc < 0)
goto fail_alloc;
return 0;
fail_alloc:
rfkill_destroy(rfkill);
fail_gpio:
gpio_free(plat->gpio_reset);
if (plat->gpio_pwr!=-1)
gpio_free(plat->gpio_pwr);
return rc;
}
static int lbee9qmb_rfkill_remove(struct platform_device *pdev)
{
struct lbee9qmb_platform_data *plat = pdev->dev.platform_data;
struct rfkill *rfkill = platform_get_drvdata(pdev);
rfkill_unregister(rfkill);
rfkill_destroy(rfkill);
gpio_free(plat->gpio_reset);
if (plat->gpio_pwr!=-1)
gpio_free(plat->gpio_pwr);
return 0;
}
static struct platform_driver lbee9qmb_rfkill_driver = {
.probe = lbee9qmb_rfkill_probe,
.remove = lbee9qmb_rfkill_remove,
.driver = {
.name = "lbee9qmb-rfkill",
.owner = THIS_MODULE,
},
};
static int __init lbee9qmb_rfkill_init(void)
{
return platform_driver_register(&lbee9qmb_rfkill_driver);
}
static void __exit lbee9qmb_rfkill_exit(void)
{
platform_driver_unregister(&lbee9qmb_rfkill_driver);
}
module_init(lbee9qmb_rfkill_init);
module_exit(lbee9qmb_rfkill_exit);
MODULE_DESCRIPTION("Murata LBEE9QMBC rfkill");
MODULE_AUTHOR("NVIDIA");
MODULE_LICENSE("GPL");
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