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/*
* This software program is licensed subject to the GNU General Public License
* (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
* (C) Copyright 2010 Bosch Sensortec GmbH
* All Rights Reserved
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/workqueue.h>
//#include <asm/hardware.h>
//#include <asm/arch/gpio.h>
//add by inter.park
#include <mach/hardware.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include "bma020_i2c.h"
#define I2C_M_WR 0x00
#define I2C_DF_NOTIFY 0x01
static struct i2c_client *g_client;
void i2c_acc_bma020_delay(unsigned int msec)
{
mdelay(msec);
}
char i2c_acc_bma020_read(u8 reg, u8 *val, unsigned int len )
{
int err;
struct i2c_msg msg[1];
unsigned char data[1];
if( (g_client == NULL) || (!g_client->adapter) )
{
return -ENODEV;
}
msg->addr = g_client->addr;
msg->flags = I2C_M_WR;
msg->len = 1;
msg->buf = data;
*data = reg;
err = i2c_transfer(g_client->adapter, msg, 1);
if (err >= 0)
{
msg->flags = I2C_M_RD;
msg->len = len;
msg->buf = val;
err = i2c_transfer(g_client->adapter, msg, 1);
}
if (err >= 0)
{
return 0;
}
printk("%s %d i2c transfer error\n", __func__, __LINE__);/* add by inter.park */
return err;
}
char i2c_acc_bma020_write( u8 reg, u8 *val )
{
int err;
struct i2c_msg msg[1];
unsigned char data[2];
if( (g_client == NULL) || (!g_client->adapter) ){
return -ENODEV;
}
data[0] = reg;
data[1] = *val;
msg->addr = g_client->addr;
msg->flags = I2C_M_WR;
msg->len = 2;
msg->buf = data;
err = i2c_transfer(g_client->adapter, msg, 1);
if (err >= 0) return 0;
printk("%s %d i2c transfer error\n", __func__, __LINE__);/* add by inter.park */
return err;
}
static int __devinit bma020_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
printk("%s called \n",__func__);
g_client = client;
return 0;
}
static int __devexit bma020_remove(struct i2c_client *client)
{
g_client = NULL;
return 0;
}
static const struct i2c_device_id bma020_ids[] = {
{ "bma020", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, bma020_ids);
struct i2c_driver acc_bma020_i2c_driver =
{
.driver = {
.name = "bma020",
},
.probe = bma020_probe,
.remove = __devexit_p(bma020_remove),
.id_table = bma020_ids,
};
int i2c_acc_bma020_init(void)
{
int ret;
printk("%s called \n",__func__);
if ( (ret = i2c_add_driver(&acc_bma020_i2c_driver)) )
{
printk("Driver registration failed, module not inserted.\n");
return ret;
}
return 0;
}
void i2c_acc_bma020_exit(void)
{
printk("[BMA020] i2c_exit\n");
i2c_del_driver(&acc_bma020_i2c_driver);
}
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