mirror of
https://github.com/followmsi/android_kernel_google_msm.git
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04e554807c
Change-Id: Ibead64ce2e901dede2ddd1b86088b88f2350ce92 Signed-off-by: Duy Truong <dtruong@codeaurora.org>
138 lines
3.1 KiB
C
138 lines
3.1 KiB
C
/* Copyright (c) 2009-2010, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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/*
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* Bluetooth Power Switch Module
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* controls power to external Bluetooth device
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* with interface to power management device
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/rfkill.h>
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static bool previous;
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static int bluetooth_toggle_radio(void *data, bool blocked)
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{
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int ret = 0;
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int (*power_control)(int enable);
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power_control = data;
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if (previous != blocked)
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ret = (*power_control)(!blocked);
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if (!ret)
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previous = blocked;
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return ret;
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}
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static const struct rfkill_ops bluetooth_power_rfkill_ops = {
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.set_block = bluetooth_toggle_radio,
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};
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static int bluetooth_power_rfkill_probe(struct platform_device *pdev)
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{
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struct rfkill *rfkill;
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int ret;
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rfkill = rfkill_alloc("bt_power", &pdev->dev, RFKILL_TYPE_BLUETOOTH,
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&bluetooth_power_rfkill_ops,
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pdev->dev.platform_data);
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if (!rfkill) {
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dev_err(&pdev->dev, "rfkill allocate failed\n");
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return -ENOMEM;
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}
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/* force Bluetooth off during init to allow for user control */
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rfkill_init_sw_state(rfkill, 1);
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previous = 1;
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ret = rfkill_register(rfkill);
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if (ret) {
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dev_err(&pdev->dev, "rfkill register failed=%d\n", ret);
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rfkill_destroy(rfkill);
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return ret;
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}
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platform_set_drvdata(pdev, rfkill);
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return 0;
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}
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static void bluetooth_power_rfkill_remove(struct platform_device *pdev)
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{
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struct rfkill *rfkill;
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dev_dbg(&pdev->dev, "%s\n", __func__);
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rfkill = platform_get_drvdata(pdev);
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if (rfkill)
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rfkill_unregister(rfkill);
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rfkill_destroy(rfkill);
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platform_set_drvdata(pdev, NULL);
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}
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static int __devinit bt_power_probe(struct platform_device *pdev)
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{
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int ret = 0;
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dev_dbg(&pdev->dev, "%s\n", __func__);
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if (!pdev->dev.platform_data) {
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dev_err(&pdev->dev, "platform data not initialized\n");
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return -ENOSYS;
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}
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ret = bluetooth_power_rfkill_probe(pdev);
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return ret;
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}
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static int __devexit bt_power_remove(struct platform_device *pdev)
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{
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dev_dbg(&pdev->dev, "%s\n", __func__);
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bluetooth_power_rfkill_remove(pdev);
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return 0;
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}
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static struct platform_driver bt_power_driver = {
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.probe = bt_power_probe,
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.remove = __devexit_p(bt_power_remove),
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.driver = {
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.name = "bt_power",
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.owner = THIS_MODULE,
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},
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};
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static int __init bluetooth_power_init(void)
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{
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int ret;
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ret = platform_driver_register(&bt_power_driver);
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return ret;
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}
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static void __exit bluetooth_power_exit(void)
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{
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platform_driver_unregister(&bt_power_driver);
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}
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("MSM Bluetooth power control driver");
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MODULE_VERSION("1.40");
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module_init(bluetooth_power_init);
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module_exit(bluetooth_power_exit);
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