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/* Copyright 2017 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* ADT7481 temperature sensor module for Chrome EC */
#ifndef __CROS_EC_ADT7481_H
#define __CROS_EC_ADT7481_H
#define ADT7481_I2C_ADDR_FLAGS 0x4B
#define ADT7481_IDX_LOCAL 0
#define ADT7481_IDX_REMOTE1 1
#define ADT7481_IDX_REMOTE2 2
/* Chip-specific registers */
#define ADT7481_LOCAL 0x00
#define ADT7481_REMOTE1 0x01
#define ADT7481_STATUS1_R 0x02
#define ADT7481_CONFIGURATION1_R 0x03
#define ADT7481_CONVERSION_RATE_R 0x04
#define ADT7481_LOCAL_HIGH_LIMIT_R 0x05
#define ADT7481_LOCAL_LOW_LIMIT_R 0x06
#define ADT7481_REMOTE1_HIGH_LIMIT_R 0x07
#define ADT7481_REMOTE1_LOW_LIMIT_R 0x08
#define ADT7481_CONFIGURATION1_W 0x09
#define ADT7481_CONVERSION_RATE_W 0x0a
#define ADT7481_LOCAL_HIGH_LIMIT_W 0x0b
#define ADT7481_LOCAL_LOW_LIMIT_W 0x0c
#define ADT7481_REMOTE1_HIGH_LIMIT_W 0x0d
#define ADT7481_REMOTE1_LOW_LIMIT_W 0x0e
#define ADT7481_ONESHOT_W 0x0f
#define ADT7481_REMOTE1_EXTD_R 0x10
#define ADT7481_REMOTE1_OFFSET 0x11
#define ADT7481_REMOTE1_OFFSET_EXTD 0x12
#define ADT7481_REMOTE1_HIGH_LIMIT_EXTD 0x13
#define ADT7481_REMOTE1_LOW_LIMIT_EXTD 0x14
#define ADT7481_REMOTE1_THERM_LIMIT 0x19
#define ADT7481_LOCAL_THERM_LIMIT 0x20
#define ADT7481_THERM_HYSTERESIS 0x21
#define ADT7481_CONSECUTIVE_ALERT 0x22
#define ADT7481_STATUS2_R 0x23
#define ADT7481_CONFIGURATION2 0x24
#define ADT7481_REMOTE2 0x30
#define ADT7481_REMOTE2_HIGH_LIMIT 0x31
#define ADT7481_REMOTE2_LOW_LIMIT 0x32
#define ADT7481_REMOTE2_EXTD_R 0x33
#define ADT7481_REMOTE2_OFFSET 0x34
#define ADT7481_REMOTE2_OFFSET_EXTD 0x35
#define ADT7481_REMOTE2_HIGH_LIMIT_EXTD 0x36
#define ADT7481_REMOTE2_LOW_LIMIT_EXTD 0x37
#define ADT7481_REMOTE2_THERM_LIMIT 0x39
#define ADT7481_DEVICE_ID 0x3d
#define ADT7481_MANUFACTURER_ID 0x3e
/* Config1 register bits */
#define ADT7481_CONFIG1_REMOTE1_ALERT_MASK BIT(0)
#define ADT7481_CONFIG1_REMOTE2_ALERT_MASK BIT(1)
#define ADT7481_CONFIG1_TEMP_RANGE BIT(2)
#define ADT7481_CONFIG1_SEL_REMOTE2 BIT(3)
/* ADT7481_CONFIG1_MODE bit is use to enable THERM mode */
#define ADT7481_CONFIG1_MODE BIT(5)
#define ADT7481_CONFIG1_RUN_L BIT(6)
/* mask all alerts on ALERT# pin */
#define ADT7481_CONFIG1_ALERT_MASK_L BIT(7)
/* Config2 register bits */
#define ADT7481_CONFIG2_LOCK BIT(7)
/* Conversion Rate/Channel Select Register */
#define ADT7481_CONV_RATE_MASK (0x0f)
#define ADT7481_CONV_RATE_16S (0x00)
#define ADT7481_CONV_RATE_8S (0x01)
#define ADT7481_CONV_RATE_4S (0x02)
#define ADT7481_CONV_RATE_2S (0x03)
#define ADT7481_CONV_RATE_1S (0x04)
#define ADT7481_CONV_RATE_500MS (0x05)
#define ADT7481_CONV_RATE_250MS (0x06)
#define ADT7481_CONV_RATE_125MS (0x07)
#define ADT7481_CONV_RATE_62500US (0x08)
#define ADT7481_CONV_RATE_31250US (0x09)
#define ADT7481_CONV_RATE_15500US (0x0a)
/* continuous mode 73 ms averaging */
#define ADT7481_CONV_RATE_73MS_AVE (0x0b)
#define ADT7481_CONV_CHAN_SELECT_MASK (0x30)
#define ADT7481_CONV_CHAN_SEL_ROUND_ROBIN (0 << 4)
#define ADT7481_CONV_CHAN_SEL_LOCAL BIT(4)
#define ADT7481_CONV_CHAN_SEL_REMOTE1 (2 << 4)
#define ADT7481_CONV_CHAN_SEL_REMOTE2 (3 << 4)
#define ADT7481_CONV_AVERAGING_L BIT(7)
/* Status1 register bits */
#define ADT7481_STATUS1_LOCAL_THERM_ALARM BIT(0)
#define ADT7481_STATUS1_REMOTE1_THERM_ALARM BIT(1)
#define ADT7481_STATUS1_REMOTE1_OPEN BIT(2)
#define ADT7481_STATUS1_REMOTE1_LOW_ALARM BIT(3)
#define ADT7481_STATUS1_REMOTE1_HIGH_ALARM BIT(4)
#define ADT7481_STATUS1_LOCAL_LOW_ALARM BIT(5)
#define ADT7481_STATUS1_LOCAL_HIGH_ALARM BIT(6)
#define ADT7481_STATUS1_BUSY BIT(7)
/* Status2 register bits */
#define ADT7481_STATUS2_ALERT BIT(0)
#define ADT7481_STATUS2_REMOTE2_THERM_ALARM BIT(1)
#define ADT7481_STATUS2_REMOTE2_OPEN BIT(2)
#define ADT7481_STATUS2_REMOTE2_LOW_ALARM BIT(3)
#define ADT7481_STATUS2_REMOTE2_HIGH_ALARM BIT(4)
/* Consecutive Alert register */
#define ADT7481_CONSEC_MASK (0xf)
#define ADT7481_CONSEC_1 (0x0)
#define ADT7481_CONSEC_2 (0x2)
#define ADT7481_CONSEC_3 (0x6)
#define ADT7481_CONSEC_4 (0xe)
#define ADT7481_CONSEC_EN_SCL_TIMEOUT BIT(5)
#define ADT7481_CONSEC_EN_SDA_TIMEOUT BIT(6)
#define ADT7481_CONSEC_MASK_LOCAL_ALERT BIT(7)
/* Limits */
#define ADT7481_HYSTERESIS_HIGH_LIMIT 255
#define ADT7481_HYSTERESIS_LOW_LIMIT 0
enum adt7481_power_state {
ADT7481_POWER_OFF = 0,
ADT7481_POWER_ON,
ADT7481_POWER_COUNT
};
enum adt7481_channel_id {
ADT7481_CHANNEL_LOCAL,
ADT7481_CHANNEL_REMOTE1,
ADT7481_CHANNEL_REMOTE2,
ADT7481_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 adt7481_get_val(int idx, int *temp_ptr);
/**
* Power control function of ADT7481 temperature sensor.
*
* @param power_on ADT7481_POWER_ON: turn ADT7481 sensor on.
* ADT7481_POWER_OFF: shut ADT7481 sensor down.
*
* @return EC_SUCCESS if successful, non-zero if error.
*/
int adt7481_set_power(enum adt7481_power_state power_on);
/*
* Set ADT7481 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 adt7481_set_therm_limit(int channel, int limit_c, int hysteresis);
#endif /* __CROS_EC_ADT7481_H */
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