/*
 *  Copyright (C) 2010-2011  RDA Micro <[email protected]>
 *  This file belong to RDA micro
 * File:        drivers/char/tcc_bt_dev.c
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/gpio.h>

#define BT_DEV_ON	1
#define BT_DEV_OFF	0

#define BT_DEV_MAJOR_NUM	234
#define BT_DEV_MINOR_NUM	0
#define DEV_NAME "tcc_bt_dev"
#define IOCTL_BT_DEV_POWER	_IO(BT_DEV_MAJOR_NUM,102)

#define GPIOWAKE	7
#define GPIOENABLE  55
static struct class *bt_dev_class;

static void RDA_bt_Power_On(void) {
	gpio_set_value(GPIOENABLE, 1);
	msleep(350);
}

static void RDA_bt_Power_Off(void) {
	gpio_set_value(GPIOENABLE, 0);
	msleep(350);
}

static int tcc_bt_dev_open(struct inode *inode, struct file *file) {
	printk("[## BT ##] tcc_bt_dev_open\n");
	return 0;
}

static int tcc_bt_dev_release(struct inode *inode, struct file *file) {
	printk("[## BT ##] tcc_bt_dev_release\n");
	return 0;
}

static void tcc_bt_power_control(int on_off) {
	printk("[## BT ##] tcc_bt_power_control input[%d]\n", on_off);
	if (on_off == BT_DEV_ON)
		RDA_bt_Power_On();
	else if (on_off == BT_DEV_OFF)
		RDA_bt_Power_Off();
	else
		printk("[## BT_ERR ##] input_error On[%d] Off[%d]\n", BT_DEV_ON, BT_DEV_OFF);
}

static long tcc_bt_dev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) {
	int intarg = *((int*) arg);
	printk("[## BT ##] tcc_bt_dev_ioctl cmd[%d] arg[%d]\n", cmd, intarg);

	switch (cmd) {
		case IOCTL_BT_DEV_POWER:
			printk("[## BT ##] IOCTL_BT_DEV_POWER cmd[%d] parm1[%d]\n", cmd, (int) arg);
			tcc_bt_power_control(intarg);
			break;
		default:
			printk("[## BT ##] tcc_bt_dev_ioctl cmd[%d]\n", cmd);
			break;
	}

	return 0;
}

struct file_operations tcc_bt_dev_ops = { .owner = THIS_MODULE, .unlocked_ioctl = tcc_bt_dev_ioctl, .open =
		tcc_bt_dev_open, .release = tcc_bt_dev_release, };

int init_module(void) {
	int ret;

	printk("[## BT ##] init_module\n");

	gpio_request_one(GPIOENABLE, GPIOF_OUT_INIT_HIGH, "bt_enable");
	gpio_request_one(GPIOWAKE, GPIOF_IN, "bt_wakeup");

	ret = register_chrdev(BT_DEV_MAJOR_NUM, DEV_NAME, &tcc_bt_dev_ops);
	bt_dev_class = class_create(THIS_MODULE, DEV_NAME);
	device_create(bt_dev_class, NULL, MKDEV(BT_DEV_MAJOR_NUM, BT_DEV_MINOR_NUM), NULL, DEV_NAME);

	if (ret < 0) {
		printk("[## BT ##] [%d]fail to register the character device\n", ret);
		return ret;
	}

	return 0;
}

void cleanup_module(void) {
	printk("[## BT ##] cleanup_module\n");
	unregister_chrdev(BT_DEV_MAJOR_NUM, DEV_NAME);
}

late_initcall( init_module);
module_exit( cleanup_module);

MODULE_AUTHOR("Telechips Inc. [email protected]");
MODULE_DESCRIPTION("TCC_BT_DEV");
MODULE_LICENSE("GPL");