/arch/arm/mach-msm/board-sapphire-rfkill.c

  1/* linux/arch/arm/mach-msm/board-sapphire-rfkill.c
  2 * Copyright (C) 2007-2009 HTC Corporation.
  3 * Author: Thomas Tsai <thomas_tsai@htc.com>
  4 *
  5 * This software is licensed under the terms of the GNU General Public
  6 * License version 2, as published by the Free Software Foundation, and
  7 * may be copied, distributed, and modified under those terms.
  8 *
  9 * This program is distributed in the hope that it will be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13*/
 14
 15/* Control bluetooth power for sapphire platform */
 16
 17#include <linux/platform_device.h>
 18#include <linux/module.h>
 19#include <linux/device.h>
 20#include <linux/rfkill.h>
 21#include <linux/delay.h>
 22#include <linux/gpio.h>
 23#include <asm/mach-types.h>
 24#include "gpio_chip.h"
 25#include "board-sapphire.h"
 26
 27static struct rfkill *bt_rfk;
 28static const char bt_name[] = "brf6300";
 29
 30extern int sapphire_bt_fastclock_power(int on);
 31
 32static int bluetooth_set_power(void *data, bool blocked)
 33{
 34	if (!blocked) {
 35		sapphire_bt_fastclock_power(1);
 36		gpio_set_value(SAPPHIRE_GPIO_BT_32K_EN, 1);
 37		udelay(10);
 38		gpio_direction_output(101, 1);
 39	} else {
 40		gpio_direction_output(101, 0);
 41		gpio_set_value(SAPPHIRE_GPIO_BT_32K_EN, 0);
 42		sapphire_bt_fastclock_power(0);
 43	}
 44	return 0;
 45}
 46
 47static struct rfkill_ops sapphire_rfkill_ops = {
 48	.set_block = bluetooth_set_power,
 49};
 50
 51static int sapphire_rfkill_probe(struct platform_device *pdev)
 52{
 53	int rc = 0;
 54	bool default_state = true;  /* off */
 55
 56	bluetooth_set_power(NULL, default_state);
 57
 58	bt_rfk = rfkill_alloc(bt_name, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
 59			      &sapphire_rfkill_ops, NULL);
 60	if (!bt_rfk)
 61		return -ENOMEM;
 62
 63	/* userspace cannot take exclusive control */
 64
 65	rfkill_set_states(bt_rfk, default_state, false);
 66
 67	rc = rfkill_register(bt_rfk);
 68
 69	if (rc)
 70		rfkill_destroy(bt_rfk);
 71	return rc;
 72}
 73
 74static int sapphire_rfkill_remove(struct platform_device *dev)
 75{
 76	rfkill_unregister(bt_rfk);
 77	rfkill_destroy(bt_rfk);
 78
 79	return 0;
 80}
 81
 82static struct platform_driver sapphire_rfkill_driver = {
 83	.probe = sapphire_rfkill_probe,
 84	.remove = sapphire_rfkill_remove,
 85	.driver = {
 86		.name = "sapphire_rfkill",
 87		.owner = THIS_MODULE,
 88	},
 89};
 90
 91static int __init sapphire_rfkill_init(void)
 92{
 93	return platform_driver_register(&sapphire_rfkill_driver);
 94}
 95
 96static void __exit sapphire_rfkill_exit(void)
 97{
 98	platform_driver_unregister(&sapphire_rfkill_driver);
 99}
100
101module_init(sapphire_rfkill_init);
102module_exit(sapphire_rfkill_exit);
103MODULE_DESCRIPTION("sapphire rfkill");
104MODULE_AUTHOR("Nick Pelly <npelly@google.com>");
105MODULE_LICENSE("GPL");