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/*
* Copyright (C) 2011 Google, Inc.
*
* 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/kernel.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
#include <linux/gpio.h>
#include <linux/ioport.h>
#include <linux/clk.h>
#include <soc/sprd/board.h>
#include <linux/of_gpio.h>
static struct rfkill *bt_rfk;
static const char bt_name[] = "bluetooth";
static unsigned long bt_power;
static unsigned long bt_reset;
static void bt_clk_init(void)
{
struct clk *bt_clk;
bt_clk = clk_get(NULL, "clk_aux0");
if (IS_ERR(bt_clk)) {
printk("clock: failed to get clk_aux0\n");
}
clk_set_rate(bt_clk, 32000);
//clk_enable(bt_clk);
clk_prepare_enable(bt_clk);
}
static void getIoResource(struct platform_device *pdev)
{
struct resource *res;
printk("rfkill get gpio\n");
res = platform_get_resource_byname(pdev, IORESOURCE_IO,"bt_power");
if (!res) {
printk("couldn't bt_power gpio\n");
}
else
bt_power = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_IO,"bt_reset");
if (!res) {
printk("couldn't find bt_reset gpio\n");
}
else
bt_reset = res->start;
printk("bt_reset = %ld, bt_power = %ld\n", bt_reset, bt_power);
}
static void getIoResourceDT(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
bt_power = of_get_gpio(np, 0);
if (bt_power < 0) {
printk("couldn't bt_power gpio\n");
}
bt_reset = of_get_gpio(np, 1);
if (bt_reset < 0) {
printk("couldn't bt_reset gpio\n");
}
printk("bt_reset = %ld, bt_power = %ld\n", bt_reset, bt_power);
}
static int bluetooth_set_power(void *data, bool blocked)
{
printk("%s: start_block=%d\n",__func__, blocked);
if (!blocked) {
gpio_direction_output(bt_power, 0);
gpio_direction_output(bt_reset, 0);
mdelay(10);
gpio_direction_output(bt_power, 1);
gpio_direction_output(bt_reset, 1);
mdelay(150);
// bt_clk_init();
} else {
gpio_direction_output(bt_power, 0);
gpio_direction_output(bt_reset, 0);
mdelay(10);
}
printk("%s: end_block=%d\n",__func__, blocked);
return 0;
}
static struct rfkill_ops rfkill_bluetooth_ops = {
.set_block = bluetooth_set_power,
};
static void rfkill_gpio_init(void)
{
if(gpio_request(bt_power,"bt_power")){
printk("request bt power fail\n");
}
if(gpio_request(bt_reset,"bt_reset")){
printk("request bt reset fail\n");
}
}
static void rfkill_gpio_deinit(void)
{
gpio_free(bt_power);
gpio_free(bt_reset);
}
static int rfkill_bluetooth_probe(struct platform_device *pdev)
{
int rc = 0;
bool default_state = true;
printk(KERN_INFO "-->%s\n", __func__);
#ifndef CONFIG_OF
getIoResource(pdev);
#else
if (pdev->dev.of_node)
getIoResourceDT(pdev);
#endif
bt_rfk = rfkill_alloc(bt_name, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
&rfkill_bluetooth_ops, NULL);
if (!bt_rfk) {
rc = -ENOMEM;
goto err_rfkill_alloc;
}
rfkill_gpio_init();
/* userspace cannot take exclusive control */
rfkill_init_sw_state(bt_rfk,false);
rc = rfkill_register(bt_rfk);
if (rc)
goto err_rfkill_reg;
rfkill_set_sw_state(bt_rfk,true);
bluetooth_set_power(NULL, default_state);
bt_clk_init();
printk(KERN_INFO "<--%s\n", __func__);
return 0;
err_rfkill_reg:
rfkill_destroy(bt_rfk);
err_rfkill_alloc:
return rc;
}
static int rfkill_bluetooth_remove(struct platform_device *dev)
{
printk(KERN_INFO "-->%s\n", __func__);
rfkill_gpio_deinit();
rfkill_unregister(bt_rfk);
rfkill_destroy(bt_rfk);
printk(KERN_INFO "<--%s\n", __func__);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id rfkill_of_match[] = {
{ .compatible = "broadcom,rfkill", },
{ }
};
MODULE_DEVICE_TABLE(of, rfkill_of_match);
#endif
static struct platform_driver rfkill_bluetooth_driver = {
.probe = rfkill_bluetooth_probe,
.remove = rfkill_bluetooth_remove,
.driver = {
.name = "rfkill",
.owner = THIS_MODULE,
#ifdef CONFIG_OF
.of_match_table = rfkill_of_match,
#endif
},
};
static int __init rfkill_bluetooth_init(void)
{
printk(KERN_INFO "-->%s\n", __func__);
return platform_driver_register(&rfkill_bluetooth_driver);
}
static void __exit rfkill_bluetooth_exit(void)
{
printk(KERN_INFO "-->%s\n", __func__);
platform_driver_unregister(&rfkill_bluetooth_driver);
}
//late_initcall(rfkill_bluetooth_init);
module_init(rfkill_bluetooth_init);
module_exit(rfkill_bluetooth_exit);
MODULE_DESCRIPTION("bluetooth rfkill");
MODULE_AUTHOR("Yale Wu <ye.wu@spreadtrum.com>");
MODULE_LICENSE("GPL");
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