112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
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/* Copyright 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* TI INA219/231 Current/Power monitor driver.
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*/
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#ifndef __CROS_EC_INA2XX_H
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#define __CROS_EC_INA2XX_H
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#define INA2XX_REG_CONFIG 0x00
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#define INA2XX_REG_SHUNT_VOLT 0x01
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#define INA2XX_REG_BUS_VOLT 0x02
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#define INA2XX_REG_POWER 0x03
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#define INA2XX_REG_CURRENT 0x04
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#define INA2XX_REG_CALIB 0x05
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#define INA2XX_REG_MASK 0x06
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#define INA2XX_REG_ALERT 0x07
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#define INA2XX_CONFIG_MODE_MASK (7 << 0)
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#define INA2XX_CONFIG_MODE_PWRDWN (0 << 0)
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#define INA2XX_CONFIG_MODE_SHUNT BIT(0)
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#define INA2XX_CONFIG_MODE_BUS BIT(1)
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#define INA2XX_CONFIG_MODE_TRG (0 << 2)
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#define INA2XX_CONFIG_MODE_CONT BIT(2)
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/* Conversion time for bus and shunt in micro-seconds */
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enum ina2xx_conv_time {
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INA2XX_CONV_TIME_140 = 0x00,
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INA2XX_CONV_TIME_204 = 0x01,
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INA2XX_CONV_TIME_332 = 0x02,
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INA2XX_CONV_TIME_588 = 0x03,
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INA2XX_CONV_TIME_1100 = 0x04,
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INA2XX_CONV_TIME_2116 = 0x05,
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INA2XX_CONV_TIME_4156 = 0x06,
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INA2XX_CONV_TIME_8244 = 0x07,
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};
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#define INA2XX_CONV_TIME_MASK 0x7
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#define INA2XX_CONFIG_SHUNT_CONV_TIME(t) ((t) << 3)
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#define INA2XX_CONFIG_BUS_CONV_TIME(t) ((t) << 6)
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#define INA2XX_CONFIG_AVG_1 (0 << 9)
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#define INA2XX_CONFIG_AVG_4 BIT(9)
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#define INA2XX_CONFIG_AVG_16 (2 << 9)
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#define INA2XX_CONFIG_AVG_64 (3 << 9)
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#define INA2XX_CONFIG_AVG_128 (4 << 9)
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#define INA2XX_CONFIG_AVG_256 (5 << 9)
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#define INA2XX_CONFIG_AVG_512 (6 << 9)
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#define INA2XX_CONFIG_AVG_1024 (7 << 9)
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#define INA2XX_MASK_EN_LEN BIT(0)
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#define INA2XX_MASK_EN_APOL BIT(1)
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#define INA2XX_MASK_EN_OVF BIT(2)
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#define INA2XX_MASK_EN_CVRF BIT(3)
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#define INA2XX_MASK_EN_AFF BIT(4)
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#define INA2XX_MASK_EN_CNVR BIT(10)
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#define INA2XX_MASK_EN_POL BIT(11)
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#define INA2XX_MASK_EN_BUL BIT(12)
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#define INA2XX_MASK_EN_BOL BIT(13)
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#define INA2XX_MASK_EN_SUL BIT(14)
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#define INA2XX_MASK_EN_SOL BIT(15)
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#if defined(CONFIG_INA231) && defined(CONFIG_INA219)
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#error CONFIG_INA231 and CONFIG_INA219 must not be both defined.
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#endif
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#ifdef CONFIG_INA231
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/* Calibration value to get current LSB = 1mA */
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#define INA2XX_CALIB_1MA(rsense_mohm) (5120/(rsense_mohm))
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/* Bus voltage: mV per LSB */
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#define INA2XX_BUS_MV(reg) ((reg) * 125 / 100)
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/* Shunt voltage: uV per LSB */
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#define INA2XX_SHUNT_UV(reg) ((reg) * 25 / 10)
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/* Power LSB: mW per current LSB */
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#define INA2XX_POW_MW(reg) ((reg) * 25 * 1/*Current mA/LSB*/)
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#else /* CONFIG_INA219 */
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/* Calibration value to get current LSB = 1mA */
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#define INA2XX_CALIB_1MA(rsense_mohm) (40960/(rsense_mohm))
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/* Bus voltage: mV per LSB */
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#define INA2XX_BUS_MV(reg) ((reg) / 2)
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/* Shunt voltage: uV per LSB */
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#define INA2XX_SHUNT_UV(reg) ((reg) * 2)
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/* Power LSB: mW per current LSB */
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#define INA2XX_POW_MW(reg) ((reg) * 20 * 1/*Current mA/LSB*/)
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#endif
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/* Read INA2XX register. */
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uint16_t ina2xx_read(uint8_t idx, uint8_t reg);
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/* Write INA2XX register. */
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int ina2xx_write(uint8_t idx, uint8_t reg, uint16_t val);
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/* Set measurement parameters */
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int ina2xx_init(uint8_t idx, uint16_t config, uint16_t calib);
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/* Return bus voltage in milliVolts */
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int ina2xx_get_voltage(uint8_t idx);
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/* Return current in milliAmps */
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int ina2xx_get_current(uint8_t idx);
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/* Return power in milliWatts */
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int ina2xx_get_power(uint8_t idx);
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#endif /* __CROS_EC_INA2XX_H */
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