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/* alps
*
* (C) Copyright 2009
* MediaTek <www.MediaTek.com>
*
* Sensor helper
*
* 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/types.h>
#include <linux/i2c.h>
#include <linux/hwmsensor.h>
#ifndef __HWMSEN_HELPER_H__
#define __HWMSEN_HELPER_H__
/******************************************************************************
* MACRO & DEFINITION
******************************************************************************/
#define C_I2C_FIFO_SIZE 8 /*according i2c_mt6516.c */
#define HWM_TAG "<HWMSEN> "
#define HWM_FUN(f) printk(HWM_TAG"%s\n", __func__)
#define HWM_ERR(fmt, args...) printk(HWM_TAG"%s %d : "fmt, __func__, __LINE__, ##args)
#define HWM_LOG(fmt, args...) printk(HWM_TAG fmt, ##args)
#define HWM_VER(fmt, args...) printk(HWM_TAG"%s: "fmt, __func__, ##args) /* ((void)0) */
/******************************************************************************
* STRUCTURE & ENUMERATION
******************************************************************************/
struct hwmsen_reg {
const char *name;
u16 addr;
u16 mode;
u16 mask;
u16 len;
};
/*----------------------------------------------------------------------------*/
#define HWMSEN_DUMMY_REG(X) {NULL, X, REG_NA, 0x00, 0}
/*----------------------------------------------------------------------------*/
struct hwmsen_reg_test_multi {
u8 addr;
u8 len;
u8 mode;
u8 _align;
};
/*----------------------------------------------------------------------------*/
enum {
REG_NA = 0x0000,
REG_RO = 0x0001,
REG_WO = 0x0002,
REG_LK = 0x0004, /*lcoked, register test will by-pass this register */
REG_RW = REG_RO | REG_WO,
};
/*----------------------------------------------------------------------------*/
/*
* @sign, map: only used in accelerometer/magnetic field
* sometimes, the sensor output need to be remapped before reporting to framework.
* the 'sign' is only -1 or +1 to align the sign for framework's coordinate system
* the 'map' align the value for framework's coordinate system. Take accelerometer
* as an exmaple:
* assume HAL receives original acceleration: acc[] = {100, 0, 100}
* sign[] = {1, -1, 1, 0};
* map[] = {HWM_CODE_ACC_Y, HWM_CODE_ACC_X, HWM_CODE_ACC_Z, 0};
* according to the above 'sign' & 'map', the sensor output need to remap as {y, -x, z}:
* float resolution = unit_numerator*GRAVITY_EARTH/unit_denominator;
* acc_x = sign[0]*acc[map[0]]*resolution;
* acc_y = sign[1]*acc[map[1]]*resolution;
* acc_z = sign[2]*acc[map[2]]*resolution;
*/
struct hwmsen_convert {
s8 sign[C_MAX_HWMSEN_EVENT_NUM];
u8 map[C_MAX_HWMSEN_EVENT_NUM];
};
/*----------------------------------------------------------------------------*/
struct hwmsen_conf {
s32 sensitivity[C_MAX_HWMSEN_EVENT_NUM]; /*output sensitivity of sensor data */
int num;
};
/*----------------------------------------------------------------------------*/
typedef struct hwmsen_reg *(*find_reg_t) (int reg_idx);
/*----------------------------------------------------------------------------*/
extern int hwmsen_set_bits(struct i2c_client *client, u8 addr, u8 bits);
extern int hwmsen_clr_bits(struct i2c_client *client, u8 addr, u8 bits);
extern int hwmsen_read_byte(struct i2c_client *client, u8 addr, u8 *data);
extern int hwmsen_write_byte(struct i2c_client *client, u8 addr, u8 data);
extern int hwmsen_read_block(struct i2c_client *client, u8 addr, u8 *data, u8 len);
extern int hwmsen_write_block(struct i2c_client *client, u8 addr, u8 *data, u8 len);
extern void hwmsen_single_rw(struct i2c_client *client, struct hwmsen_reg *regs, int num);
extern void hwmsen_multi_rw(struct i2c_client *client, find_reg_t findreg,
struct hwmsen_reg_test_multi *items, int inum);
extern ssize_t hwmsen_show_dump(struct i2c_client *client, u8 startAddr, u8 *regtbl, u32 regnum,
find_reg_t findreg, char *buf, u32 buflen);
extern ssize_t hwmsen_read_all_regs(struct i2c_client *client, struct hwmsen_reg *regs, u32 num,
char *buf, u32 buflen);
extern ssize_t hwmsen_show_reg(struct i2c_client *client, u8 addr, char *buf, u32 buflen);
extern ssize_t hwmsen_store_reg(struct i2c_client *client, u8 addr, const char *buf, size_t count);
extern ssize_t hwmsen_show_byte(struct device *dev, struct device_attribute *attr, char *buf,
u32 buflen);
extern ssize_t hwmsen_store_byte(struct device *dev, struct device_attribute *attr, const char *buf,
size_t count);
extern ssize_t hwmsen_show_word(struct device *dev, struct device_attribute *attr, char *buf,
u32 buflen);
extern ssize_t hwmsen_store_word(struct device *dev, struct device_attribute *attr, const char *buf,
size_t count);
extern int hwmsen_get_convert(int direction, struct hwmsen_convert *cvt);
/*----------------------------------------------------------------------------*/
#endif
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