M7350/kernel/arch/arm/mach-msm/board-mahimahi-rfkill.c
2024-09-09 08:52:07 +00:00

123 lines
2.9 KiB
C

/*
* Copyright (C) 2009 Google, Inc.
* Copyright (C) 2009 HTC Corporation.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
#include <asm/gpio.h>
#include <asm/mach-types.h>
#include "board-mahimahi.h"
static struct rfkill *bt_rfk;
static const char bt_name[] = "bcm4329";
static int bluetooth_set_power(void *data, bool blocked)
{
if (!blocked) {
gpio_direction_output(MAHIMAHI_GPIO_BT_RESET_N, 1);
gpio_direction_output(MAHIMAHI_GPIO_BT_SHUTDOWN_N, 1);
} else {
gpio_direction_output(MAHIMAHI_GPIO_BT_SHUTDOWN_N, 0);
gpio_direction_output(MAHIMAHI_GPIO_BT_RESET_N, 0);
}
return 0;
}
static struct rfkill_ops mahimahi_rfkill_ops = {
.set_block = bluetooth_set_power,
};
static int mahimahi_rfkill_probe(struct platform_device *pdev)
{
int rc = 0;
bool default_state = true; /* off */
rc = gpio_request(MAHIMAHI_GPIO_BT_RESET_N, "bt_reset");
if (rc)
goto err_gpio_reset;
rc = gpio_request(MAHIMAHI_GPIO_BT_SHUTDOWN_N, "bt_shutdown");
if (rc)
goto err_gpio_shutdown;
bluetooth_set_power(NULL, default_state);
bt_rfk = rfkill_alloc(bt_name, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
&mahimahi_rfkill_ops, NULL);
if (!bt_rfk) {
rc = -ENOMEM;
goto err_rfkill_alloc;
}
rfkill_set_states(bt_rfk, default_state, false);
/* userspace cannot take exclusive control */
rc = rfkill_register(bt_rfk);
if (rc)
goto err_rfkill_reg;
return 0;
err_rfkill_reg:
rfkill_destroy(bt_rfk);
err_rfkill_alloc:
gpio_free(MAHIMAHI_GPIO_BT_SHUTDOWN_N);
err_gpio_shutdown:
gpio_free(MAHIMAHI_GPIO_BT_RESET_N);
err_gpio_reset:
return rc;
}
static int mahimahi_rfkill_remove(struct platform_device *dev)
{
rfkill_unregister(bt_rfk);
rfkill_destroy(bt_rfk);
gpio_free(MAHIMAHI_GPIO_BT_SHUTDOWN_N);
gpio_free(MAHIMAHI_GPIO_BT_RESET_N);
return 0;
}
static struct platform_driver mahimahi_rfkill_driver = {
.probe = mahimahi_rfkill_probe,
.remove = mahimahi_rfkill_remove,
.driver = {
.name = "mahimahi_rfkill",
.owner = THIS_MODULE,
},
};
static int __init mahimahi_rfkill_init(void)
{
if (!machine_is_mahimahi())
return 0;
return platform_driver_register(&mahimahi_rfkill_driver);
}
static void __exit mahimahi_rfkill_exit(void)
{
platform_driver_unregister(&mahimahi_rfkill_driver);
}
module_init(mahimahi_rfkill_init);
module_exit(mahimahi_rfkill_exit);
MODULE_DESCRIPTION("mahimahi rfkill");
MODULE_AUTHOR("Nick Pelly <npelly@google.com>");
MODULE_LICENSE("GPL");