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/*
* Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file mc9s08dz60.c
* @brief Driver for MC9sdz60
*
* @ingroup pmic
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/proc_fs.h>
#include <linux/i2c.h>
#include <linux/mfd/mc9s08dz60/core.h>
#include <mach/clock.h>
#include <linux/uaccess.h>
#include "mc9s08dz60.h"
/* I2C bus id and device address of mcu */
#define I2C1_BUS 0
#define MC9S08DZ60_I2C_ADDR 0xD2 /* 7bits I2C address */
static struct i2c_client *mc9s08dz60_i2c_client;
int mc9s08dz60_read_reg(u8 reg, u8 *value)
{
*value = (u8) i2c_smbus_read_byte_data(mc9s08dz60_i2c_client, reg);
return 0;
}
int mc9s08dz60_write_reg(u8 reg, u8 value)
{
if (i2c_smbus_write_byte_data(mc9s08dz60_i2c_client, reg, value) < 0)
return -1;
return 0;
}
static ssize_t mc9s08dz60_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
unsigned int i;
u8 value;
int offset = 7;
for (i = 0; i < 7; i++) {
mc9s08dz60_read_reg(i, &value);
pr_info("reg%02x: %02x\t", i, value);
mc9s08dz60_read_reg(i + offset, &value);
pr_info("reg%02x: %02x\t", i + offset, value);
mc9s08dz60_read_reg(i + offset * 2, &value);
pr_info("reg%02x: %02x\t", i + offset * 2, value);
mc9s08dz60_read_reg(i + offset * 3, &value);
pr_info("reg%02x: %02x\t", i + offset * 3, value);
mc9s08dz60_read_reg(i + offset * 4, &value);
pr_info("reg%02x: %02x\t", i + offset * 4, value);
mc9s08dz60_read_reg(i + offset * 5, &value);
pr_info("reg%02x: %02x\n", i + offset * 5, value);
}
return 0;
}
static ssize_t mc9s08dz60_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
int ret;
unsigned long reg, new_value;
u8 value;
char *p;
strict_strtoul(buf, 16, ®);
p = NULL;
p = memchr(buf, ' ', count);
if (p == NULL) {
mc9s08dz60_read_reg(reg, &value);
pr_info("reg%02lu: %06x\n", reg, value);
return count;
}
p += 1;
strict_strtoul(p, 16, &new_value);
value = new_value;
ret = mc9s08dz60_write_reg((u8)reg, value);
if (ret == 0)
pr_info("write reg%02lx: %06x\n", reg, value);
else
pr_info("register update failed\n");
return count;
}
static struct device_attribute mc9s08dz60_dev_attr = {
.attr = {
.name = "mc9s08dz60_ctl",
.mode = S_IRUSR | S_IWUSR,
},
.show = mc9s08dz60_show,
.store = mc9s08dz60_store,
};
/*!
* mc9s08dz60 I2C attach function
*
* @param adapter struct i2c_adapter *
* @return 0
*/
static int mc9s08dz60_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret = 0;
struct mc9s08dz60 *mc9s08dz60 = NULL;
struct mc9s08dz60_platform_data *plat_data = client->dev.platform_data;
pr_info("mc9s08dz60 probing .... \n");
mc9s08dz60 = kzalloc(sizeof(struct mc9s08dz60), GFP_KERNEL);
if (mc9s08dz60 == NULL)
return -ENOMEM;
i2c_set_clientdata(client, mc9s08dz60);
mc9s08dz60->dev = &client->dev;
mc9s08dz60->i2c_client = client;
if (plat_data && plat_data->init) {
ret = plat_data->init(mc9s08dz60);
if (ret != 0)
return -1;
}
ret = device_create_file(&client->dev, &mc9s08dz60_dev_attr);
if (ret)
dev_err(&client->dev, "create device file failed!\n");
mc9s08dz60_i2c_client = client;
return 0;
}
/*!
* mc9s08dz60 I2C detach function
*
* @param client struct i2c_client *
* @return 0
*/
static int mc9s08dz60_remove(struct i2c_client *client)
{
return 0;
}
static const struct i2c_device_id mc9s08dz60_id[] = {
{ "mc9s08dz60", 0 },
{},
};
MODULE_DEVICE_TABLE(i2c, mc9s08dz60_id);
static struct i2c_driver mc9s08dz60_i2c_driver = {
.driver = {.owner = THIS_MODULE,
.name = "mc9s08dz60",
},
.probe = mc9s08dz60_probe,
.remove = mc9s08dz60_remove,
.id_table = mc9s08dz60_id,
};
#define SET_BIT_IN_BYTE(byte, pos) (byte |= (0x01 << pos))
#define CLEAR_BIT_IN_BYTE(byte, pos) (byte &= ~(0x01 << pos))
int mc9s08dz60_init(void)
{
int err;
err = i2c_add_driver(&mc9s08dz60_i2c_driver);
return err;
}
void mc9s08dz60_exit(void)
{
i2c_del_driver(&mc9s08dz60_i2c_driver);
}
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