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/*
* Copyright (C) 2010 MEMSIC, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/i2c.h>
#include "mpu.h"
#include "mlsl.h"
#include "mlos.h"
#include <log.h>
#define MMC328X_I2C_ADDR 0x30
#define MMC328X_REG_CTRL 0x07
#define MMC328X_REG_DATA 0x00
#define MMC328X_REG_DS 0x06
#define MMC328X_CTRL_TM 0x01
#define MMC328X_CTRL_RM 0x20
#define MMC328X_DELAY_TM 10 /* ms */
#define MMC328X_DELAY_RM 10 /* ms */
#define MMC328X_DELAY_STDN 1 /* ms */
static int mmc328x_i2c_rx_data(void *mlsl_handle,
struct ext_slave_platform_data *pdata, char *buf, int len)
{
uint8_t i;
struct i2c_msg msgs[2] = { 0, };
if (NULL == buf || NULL == mlsl_handle)
return -EINVAL;
msgs[0].addr = pdata->address;
msgs[0].flags = 0;
msgs[0].len = 1;
msgs[0].buf = buf;
msgs[1].addr = pdata->address;
msgs[1].flags = I2C_M_RD;
msgs[1].len = len;
msgs[1].buf = buf;
if (i2c_transfer(mlsl_handle, msgs, 2) >= 0)
return -1;
return 0;
}
static int mmc328x_i2c_tx_data(void *mlsl_handle,
struct ext_slave_platform_data *pdata, char *buf, int len)
{
struct i2c_msg msgs[1];
int res;
if (NULL == buf || NULL == mlsl_handle)
return -EINVAL;
msgs[0].addr = pdata->address;
msgs[0].flags = 0; /* write */
msgs[0].buf = (unsigned char *)buf;
msgs[0].len = len;
res = i2c_transfer(mlsl_handle, msgs, 1);
if (res < 1)
return res;
else
return 0;
}
int memsic_api_resume(void *mlsl_handle,
struct ext_slave_platform_data *pdata)
{
#if 0
unsigned char data[2] = { 0 };
data[0] = MMC328X_REG_CTRL;
data[1] = MMC328X_CTRL_RM;
if (mmc328x_i2c_tx_data(mlsl_handle, pdata, data, 2) < 0)
return -1;
msleep(MMC328X_DELAY_RM);
#endif
return 0;
}
int memsic_api_suspend(void *mlsl_handle,
struct ext_slave_platform_data *pdata)
{
#if 0
unsigned char data[2] = { 0 };
data[0] = MMC328X_REG_CTRL;
data[1] = 0;
if (mmc328x_i2c_tx_data(mlsl_handle, pdata, data, 2) < 0)
return -1;
msleep(MMC328X_DELAY_RM);
data[0] = MMC328X_REG_CTRL;
data[1] = 0;
mmc328x_i2c_tx_data(mlsl_handle, pdata, data, 2);
msleep(MMC328X_DELAY_TM);
#endif
return 0;
}
int memsic_api_read(void *mlsl_handle, struct ext_slave_platform_data *pdata,
unsigned char *raw_data, int *accuracy)
{
unsigned char data[6] = { 0 };
int MD_times = 0;
data[0] = MMC328X_REG_CTRL;
data[1] = MMC328X_CTRL_TM;
mmc328x_i2c_tx_data(mlsl_handle, pdata, data, 2);
msleep(MMC328X_DELAY_TM);
data[0] = MMC328X_REG_DS;
if (mmc328x_i2c_rx_data(mlsl_handle, pdata, data, 1) < 0)
return -EFAULT;
while (!(data[0] & 0x01)) {
msleep(20);
data[0] = MMC328X_REG_DS;
if (mmc328x_i2c_rx_data(mlsl_handle, pdata, data, 1) < 0)
return -EFAULT;
if (data[0] & 0x01)
break;
MD_times++;
if (MD_times > 2)
return -EFAULT;
}
data[0] = MMC328X_REG_DATA;
if (mmc328x_i2c_rx_data(mlsl_handle, pdata, data, 6) < 0)
return -EFAULT;
memcpy(raw_data, data, sizeof(unsigned char) * 6);
*accuracy = 0;
return 0;
}
int mmc328x_read(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata, unsigned char *data)
{
int xyz[3] = { 0, };
int accuracy = 0;
memsic_api_read(mlsl_handle, pdata, data, &accuracy);
return ML_SUCCESS;
}
int mmc328x_suspend(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = ML_SUCCESS;
memsic_api_suspend(mlsl_handle, pdata);
return result;
}
int mmc328x_resume(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
memsic_api_resume(mlsl_handle, pdata);
return ML_SUCCESS;
}
struct ext_slave_descr mmc328x_descr = {
/*.init = */ NULL,
/*.exit = */ NULL,
/*.suspend = */ mmc328x_suspend,
/*.resume = */ mmc328x_resume,
/*.read = */ mmc328x_read,
/*.config = */ NULL,
/*.get_config = */ NULL,
/*.name = */ "mmc328x",
/*.type = */ EXT_SLAVE_TYPE_COMPASS,
/*.id = */ COMPASS_ID_MMC328X,
/*.reg = */ 0x01,
/*.len = */ 6,
/*.endian = */ EXT_SLAVE_BIG_ENDIAN,
/*.range = */ {400, 0},
};
struct ext_slave_descr *mmc328x_get_slave_descr(void)
{
return &mmc328x_descr;
}
EXPORT_SYMBOL(mmc328x_get_slave_descr);
/**
* @}
**/
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