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/* Copyright 2013 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* TMP432 temperature sensor module for Chrome EC */
#ifndef __CROS_EC_TMP432_H
#define __CROS_EC_TMP432_H
#define TMP432_I2C_ADDR_FLAGS 0x4C
#define TMP432_IDX_LOCAL 0
#define TMP432_IDX_REMOTE1 1
#define TMP432_IDX_REMOTE2 2
#define TMP432_IDX_COUNT 3
/* Chip-specific registers */
#define TMP432_LOCAL 0x00
#define TMP432_REMOTE1 0x01
#define TMP432_STATUS 0x02
#define TMP432_CONFIGURATION1_R 0x03
#define TMP432_CONVERSION_RATE_R 0x04
#define TMP432_LOCAL_HIGH_LIMIT_R 0x05
#define TMP432_LOCAL_LOW_LIMIT_R 0x06
#define TMP432_REMOTE1_HIGH_LIMIT_R 0x07
#define TMP432_REMOTE1_LOW_LIMIT_R 0x08
#define TMP432_CONFIGURATION1_W 0x09
#define TMP432_CONVERSION_RATE_W 0x0a
#define TMP432_LOCAL_HIGH_LIMIT_W 0x0b
#define TMP432_LOCAL_LOW_LIMIT_W 0x0c
#define TMP432_REMOTE1_HIGH_LIMIT_W 0x0d
#define TMP432_REMOTE1_LOW_LIMIT_W 0x0e
#define TMP432_ONESHOT 0x0f
#define TMP432_REMOTE1_EXTD 0x10
#define TMP432_REMOTE1_HIGH_LIMIT_EXTD 0x13
#define TMP432_REMOTE1_LOW_LIMIT_EXTD 0x14
#define TMP432_REMOTE2_HIGH_LIMIT_R 0x15
#define TMP432_REMOTE2_HIGH_LIMIT_W 0x15
#define TMP432_REMOTE2_LOW_LIMIT_R 0x16
#define TMP432_REMOTE2_LOW_LIMIT_W 0x16
#define TMP432_REMOTE2_HIGH_LIMIT_EXTD 0x17
#define TMP432_REMOTE2_LOW_LIMIT_EXTD 0x18
#define TMP432_REMOTE1_THERM_LIMIT 0x19
#define TMP432_REMOTE2_THERM_LIMIT 0x1a
#define TMP432_STATUS_FAULT 0x1b
#define TMP432_CHANNEL_MASK 0x1f
#define TMP432_LOCAL_THERM_LIMIT 0x20
#define TMP432_THERM_HYSTERESIS 0x21
#define TMP432_CONSECUTIVE_ALERT 0x22
#define TMP432_REMOTE2 0x23
#define TMP432_REMOTE2_EXTD 0x24
#define TMP432_BETA_RANGE_CH1 0x25
#define TMP432_BETA_RANGE_CH2 0x26
#define TMP432_NFACTOR_REMOTE1 0x27
#define TMP432_NFACTOR_REMOTE2 0x28
#define TMP432_LOCAL_EXTD 0x29
#define TMP432_STATUS_LIMIT_HIGH 0x35
#define TMP432_STATUS_LIMIT_LOW 0x36
#define TMP432_STATUS_THERM 0x37
#define TMP432_LOCAL_HIGH_LIMIT_EXTD 0x3d
#define TMP432_LOCAL_LOW_LIMIT_EXTD 0x3e
#define TMP432_CONFIGURATION2_R 0x3f
#define TMP432_CONFIGURATION2_W 0x3f
#define TMP432_RESET_W 0xfc
#define TMP432_DEVICE_ID 0xfd
#define TMP432_MANUFACTURER_ID 0xfe
/* Config register bits */
#define TMP432_CONFIG1_TEMP_RANGE BIT(2)
/* TMP432_CONFIG1_MODE bit is use to enable THERM mode */
#define TMP432_CONFIG1_MODE BIT(5)
#define TMP432_CONFIG1_RUN_L BIT(6)
#define TMP432_CONFIG1_ALERT_MASK_L BIT(7)
#define TMP432_CONFIG2_RESISTANCE_CORRECTION BIT(2)
#define TMP432_CONFIG2_LOCAL_ENABLE BIT(3)
#define TMP432_CONFIG2_REMOTE1_ENABLE BIT(4)
#define TMP432_CONFIG2_REMOTE2_ENABLE BIT(5)
/* Status register bits */
#define TMP432_STATUS_TEMP_THERM_ALARM BIT(1)
#define TMP432_STATUS_OPEN BIT(2)
#define TMP432_STATUS_TEMP_LOW_ALARM BIT(3)
#define TMP432_STATUS_TEMP_HIGH_ALARM BIT(4)
#define TMP432_STATUS_BUSY BIT(7)
/* Limintaions */
#define TMP432_HYSTERESIS_HIGH_LIMIT 255
#define TMP432_HYSTERESIS_LOW_LIMIT 0
enum tmp432_power_state {
TMP432_POWER_OFF = 0,
TMP432_POWER_ON,
TMP432_POWER_COUNT
};
enum tmp432_channel_id {
TMP432_CHANNEL_LOCAL,
TMP432_CHANNEL_REMOTE1,
TMP432_CHANNEL_REMOTE2,
TMP432_CHANNEL_COUNT
};
/**
* Get the last polled value of a sensor.
*
* @param idx Index to read. Idx indicates whether to read die
* temperature or external temperature.
* @param temp_ptr Destination for temperature in K.
*
* @return EC_SUCCESS if successful, non-zero if error.
*/
int tmp432_get_val(int idx, int *temp_ptr);
/**
* Power control function of tmp432 temperature sensor.
*
* @param power_on TMP432_POWER_ON: turn tmp432 sensor on.
* TMP432_POWER_OFF: shut tmp432 sensor down.
*
* @return EC_SUCCESS if successful, non-zero if error.
*/
int tmp432_set_power(enum tmp432_power_state power_on);
/*
* Set TMP432 ALERT#/THERM2# pin to THERM mode, and give a limit
* for a specific channel.
*
* @param channel specific a channel
*
* @param limit_c High limit temperature, default: 85C
*
* @param hysteresis Hysteresis temperature, default: 10C
* All channels share the same hysteresis
*
* In THERM mode, ALERT# pin will trigger(Low) by itself when any
* channel's temperature is greater( >= )than channel's limit_c,
* and release(High) by itself when channel's temperature is lower
* than (limit_c - hysteresis)
*/
int tmp432_set_therm_limit(int channel, int limit_c, int hysteresis);
#endif /* __CROS_EC_TMP432_H */
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