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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
*/
#ifndef __W1_DS2438_H__
#define __W1_DS2438_H__
#include <asm/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/types.h>
#define DS2438_DEV_NAME "ds2438-battery"
#define DS2438_PAGE_SIZE 8
#define DS2438_PAGE_NUM 8
#define DS2438_CONVERT_TEMP 0x44
#define DS2438_CONVERT_VOLT 0xB4
#define DS2438_WRITE_SCRATCHPAD 0x4E
#define DS2438_COPY_SCRATCHPAD 0x48
#define DS2438_RECALL_MEMORY 0xB8
enum DS2438_PAGE {
PAGE0_CONTROL = 0,
PAGE1_ETM,
PAGE2_STAMP,
PAGE3_RESV3,
PAGE4_RESV4,
PAGE5_RESV5,
PAGE6_RESV6,
PAGE7_CCA,
};
enum DS2438_REG {
/* PAGE 0 */
PAGE0_STAT_CTRL = 0,
PAGE0_TEMP_LSB = 1,
PAGE0_TEMP_MSB = 2,
PAGE0_VOLTAGE_LSB = 3,
PAGE0_VOLTAGE_MSB = 4,
PAGE0_CURRENT_LSB = 5,
PAGE0_CURRENT_MSB = 6,
PAGE0_THRESHOLD = 7,
/* PAGE 1 */
PAGE1_ETM_BYTE0 = 0,
PAGE1_ETM_BYTE1 = 1,
PAGE1_ETM_BYTE2 = 2,
PAGE1_ETM_BYTE3 = 3,
PAGE1_ICA = 4,
PAGE1_OFFSET_LSB = 5,
PAGE1_OFFSET_MSB = 6,
/* PAGE 2 */
PAGE2_DISCONNECT_BYTE0 = 0,
PAGE2_DISCONNECT_BYTE1 = 1,
PAGE2_DISCONNECT_BYTE2 = 2,
PAGE2_DISCONNECT_BYTE3 = 3,
PAGE2_END_CHARGE_BYTE0 = 4,
PAGE2_END_CHARGE_BYTE1 = 5,
PAGE2_END_CHARGE_BYTE2 = 6,
PAGE2_END_CHARGE_BYTE3 = 7,
/* PAGE 3 */
/* PAGE 4 */
/* PAGE 5 */
/* PAGE 6 */
/* PAGE 7 */
PAGE7_CCA_LSB = 4,
PAGE7_CCA_MSB = 5,
PAGE7_DCA_LSB = 6,
PAGE7_DCA_MSB = 7,
};
#define DS2438_CTRL_IAD (1 << 0)
#define DS2438_CTRL_CA (1 << 1)
#define DS2438_CTRL_EE (1 << 2)
#define DS2438_CTRL_AD (1 << 3)
#define DS2438_STAT_TB (1 << 4)
#define DS2438_STAT_NVB (1 << 5)
#define DS2438_STAT_ADB (1 << 6)
struct ds2438_ops {
int (*read_page) (struct device *, u8, u8 *);
int (*read_byte) (struct device *, u8, u8, u8 *);
int (*read_halfword) (struct device *, u8, u8, u16 *);
int (*read_word) (struct device *, u8, u8, u32 *);
int (*write_page) (struct device *, u8, u8 *);
int (*write_byte) (struct device *, u8, u8, u8);
int (*write_halfword) (struct device *, u8, u8, u16);
int (*write_word) (struct device *, u8, u8, u32);
int (*drain_sram) (struct device *, u8);
int (*load_sram) (struct device *, u8);
int (*command) (struct device *, u8, u8);
};
static inline u16 ds2438_readw(u8 *raw)
{
return ((*(raw + 1)) << 8) | (*raw);
}
static inline void ds2438_writew(u8 *raw, u16 data)
{
*raw++ = data & 0xFF;
*raw = (data >> 8) & 0xFF;
}
extern int w1_ds2438_read_page(struct device *dev, u8 page, u8 *buf);
extern int w1_ds2438_write_page(struct device *dev, u8 page, u8 *buf);
extern int w1_ds2438_command(struct device *dev, u8 command, u8 data);
extern int w1_ds2438_drain_sram(struct device *dev, u8 page);
extern int w1_ds2438_load_sram(struct device *dev, u8 page);
#endif /* __W1_DS2438_H__ */
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