w1_ds2781.h

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/*
 * 1-Wire implementation for the ds2780 chip
 *
 * Author: Renata Sayakhova <[email protected]>
 *
 * Based on w1-ds2760 driver
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#ifndef _W1_DS2781_H
#define _W1_DS2781_H

/* Function commands */
#define W1_DS2781_READ_DATA     0x69
#define W1_DS2781_WRITE_DATA        0x6C
#define W1_DS2781_COPY_DATA     0x48
#define W1_DS2781_RECALL_DATA       0xB8
#define W1_DS2781_LOCK          0x6A

/* Register map */
/* Register 0x00 Reserved */
#define DS2781_STATUS           0x01
#define DS2781_RAAC_MSB         0x02
#define DS2781_RAAC_LSB         0x03
#define DS2781_RSAC_MSB         0x04
#define DS2781_RSAC_LSB         0x05
#define DS2781_RARC         0x06
#define DS2781_RSRC         0x07
#define DS2781_IAVG_MSB         0x08
#define DS2781_IAVG_LSB         0x09
#define DS2781_TEMP_MSB         0x0A
#define DS2781_TEMP_LSB         0x0B
#define DS2781_VOLT_MSB         0x0C
#define DS2781_VOLT_LSB         0x0D
#define DS2781_CURRENT_MSB      0x0E
#define DS2781_CURRENT_LSB      0x0F
#define DS2781_ACR_MSB          0x10
#define DS2781_ACR_LSB          0x11
#define DS2781_ACRL_MSB         0x12
#define DS2781_ACRL_LSB         0x13
#define DS2781_AS           0x14
#define DS2781_SFR          0x15
#define DS2781_FULL_MSB         0x16
#define DS2781_FULL_LSB         0x17
#define DS2781_AE_MSB           0x18
#define DS2781_AE_LSB           0x19
#define DS2781_SE_MSB           0x1A
#define DS2781_SE_LSB           0x1B
/* Register 0x1C - 0x1E Reserved */
#define DS2781_EEPROM       0x1F
#define DS2781_EEPROM_BLOCK0_START  0x20
/* Register 0x20 - 0x2F User EEPROM */
#define DS2781_EEPROM_BLOCK0_END    0x2F
/* Register 0x30 - 0x5F Reserved */
#define DS2781_EEPROM_BLOCK1_START  0x60
#define DS2781_CONTROL          0x60
#define DS2781_AB           0x61
#define DS2781_AC_MSB           0x62
#define DS2781_AC_LSB           0x63
#define DS2781_VCHG         0x64
#define DS2781_IMIN         0x65
#define DS2781_VAE          0x66
#define DS2781_IAE          0x67
#define DS2781_AE_40            0x68
#define DS2781_RSNSP            0x69
#define DS2781_FULL_40_MSB      0x6A
#define DS2781_FULL_40_LSB      0x6B
#define DS2781_FULL_4_SLOPE     0x6C
#define DS2781_FULL_3_SLOPE     0x6D
#define DS2781_FULL_2_SLOPE     0x6E
#define DS2781_FULL_1_SLOPE     0x6F
#define DS2781_AE_4_SLOPE       0x70
#define DS2781_AE_3_SLOPE       0x71
#define DS2781_AE_2_SLOPE       0x72
#define DS2781_AE_1_SLOPE       0x73
#define DS2781_SE_4_SLOPE       0x74
#define DS2781_SE_3_SLOPE       0x75
#define DS2781_SE_2_SLOPE       0x76
#define DS2781_SE_1_SLOPE       0x77
#define DS2781_RSGAIN_MSB       0x78
#define DS2781_RSGAIN_LSB       0x79
#define DS2781_RSTC         0x7A
#define DS2781_COB          0x7B
#define DS2781_TBP34            0x7C
#define DS2781_TBP23            0x7D
#define DS2781_TBP12            0x7E
#define DS2781_EEPROM_BLOCK1_END    0x7F
/* Register 0x7D - 0xFF Reserved */

#define DS2781_FSGAIN_MSB       0xB0
#define DS2781_FSGAIN_LSB       0xB1

/* Number of valid register addresses */
#define DS2781_DATA_SIZE        0xB2

/* Status register bits */
#define DS2781_STATUS_CHGTF     (1 << 7)
#define DS2781_STATUS_AEF       (1 << 6)
#define DS2781_STATUS_SEF       (1 << 5)
#define DS2781_STATUS_LEARNF        (1 << 4)
/* Bit 3 Reserved */
#define DS2781_STATUS_UVF       (1 << 2)
#define DS2781_STATUS_PORF      (1 << 1)
/* Bit 0 Reserved */

/* Control register bits */
/* Bit 7 Reserved */
#define DS2781_CONTROL_NBEN     (1 << 7)
#define DS2781_CONTROL_UVEN     (1 << 6)
#define DS2781_CONTROL_PMOD     (1 << 5)
#define DS2781_CONTROL_RNAOP        (1 << 4)
#define DS1781_CONTROL_UVTH     (1 << 3)
/* Bit 0 - 2 Reserved */

/* Special feature register bits */
/* Bit 1 - 7 Reserved */
#define DS2781_SFR_PIOSC        (1 << 0)

/* EEPROM register bits */
#define DS2781_EEPROM_EEC       (1 << 7)
#define DS2781_EEPROM_LOCK      (1 << 6)
/* Bit 2 - 6 Reserved */
#define DS2781_EEPROM_BL1       (1 << 1)
#define DS2781_EEPROM_BL0       (1 << 0)

extern int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
            int io);
extern int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd);

#endif /* !_W1_DS2781_H */