Extend INA231 driver to support INA219 on Plankton

The register format of INA231 and INA219 are very much alike. In our
use case, we only need to use different coversion coefficient.

BRANCH=None
BUG=chrome-os-partner:32764
TEST='ina 0' on Plankton V2.
TEST=Build twinkie.

Change-Id: I9c8e21e30ed844566793dcc1221f865400c3d90d
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/223370
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

1 files changed, 111 insertions, 0 deletions

diff --git a/driver/ina2xx.h b/driver/ina2xx.h
new file mode 100644
index 0000000000..25b9f13296
--- /dev/null
+++ b/driver/ina2xx.h
@@ -0,0 +1,111 @@
+/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * TI INA219/231 Current/Power monitor driver.
+ */
+
+#ifndef INA2XX_H
+#define INA2XX_H
+
+#define INA2XX_REG_CONFIG     0x00
+#define INA2XX_REG_SHUNT_VOLT 0x01
+#define INA2XX_REG_BUS_VOLT   0x02
+#define INA2XX_REG_POWER      0x03
+#define INA2XX_REG_CURRENT    0x04
+#define INA2XX_REG_CALIB      0x05
+#define INA2XX_REG_MASK       0x06
+#define INA2XX_REG_ALERT      0x07
+
+#define INA2XX_CONFIG_MODE_MASK     (7 << 0)
+#define INA2XX_CONFIG_MODE_PWRDWN   (0 << 0)
+#define INA2XX_CONFIG_MODE_SHUNT    (1 << 0)
+#define INA2XX_CONFIG_MODE_BUS      (1 << 1)
+#define INA2XX_CONFIG_MODE_TRG      (0 << 2)
+#define INA2XX_CONFIG_MODE_CONT     (1 << 2)
+
+/* Conversion time for bus and shunt in micro-seconds */
+enum ina2xx_conv_time {
+	INA2XX_CONV_TIME_140  = 0x00,
+	INA2XX_CONV_TIME_204  = 0x01,
+	INA2XX_CONV_TIME_332  = 0x02,
+	INA2XX_CONV_TIME_588  = 0x03,
+	INA2XX_CONV_TIME_1100 = 0x04,
+	INA2XX_CONV_TIME_2116 = 0x05,
+	INA2XX_CONV_TIME_4156 = 0x06,
+	INA2XX_CONV_TIME_8244 = 0x07,
+};
+#define INA2XX_CONV_TIME_MASK 0x7
+#define INA2XX_CONFIG_SHUNT_CONV_TIME(t) ((t) << 3)
+#define INA2XX_CONFIG_BUS_CONV_TIME(t)   ((t) << 6)
+
+#define INA2XX_CONFIG_AVG_1        (0 << 9)
+#define INA2XX_CONFIG_AVG_4        (1 << 9)
+#define INA2XX_CONFIG_AVG_16       (2 << 9)
+#define INA2XX_CONFIG_AVG_64       (3 << 9)
+#define INA2XX_CONFIG_AVG_128      (4 << 9)
+#define INA2XX_CONFIG_AVG_256      (5 << 9)
+#define INA2XX_CONFIG_AVG_512      (6 << 9)
+#define INA2XX_CONFIG_AVG_1024     (7 << 9)
+
+#define INA2XX_MASK_EN_LEN         (1 << 0)
+#define INA2XX_MASK_EN_APOL        (1 << 1)
+#define INA2XX_MASK_EN_OVF         (1 << 2)
+#define INA2XX_MASK_EN_CVRF        (1 << 3)
+#define INA2XX_MASK_EN_AFF         (1 << 4)
+#define INA2XX_MASK_EN_CNVR        (1 << 10)
+#define INA2XX_MASK_EN_POL         (1 << 11)
+#define INA2XX_MASK_EN_BUL         (1 << 12)
+#define INA2XX_MASK_EN_BOL         (1 << 13)
+#define INA2XX_MASK_EN_SUL         (1 << 14)
+#define INA2XX_MASK_EN_SOL        (1 << 15)
+
+
+#if defined(CONFIG_INA231) && defined(CONFIG_INA219)
+#error CONFIG_INA231 and CONFIG_INA219 must not be both defined.
+#endif
+
+#ifdef CONFIG_INA231
+
+/* Calibration value to get current LSB = 1mA */
+#define INA2XX_CALIB_1MA(rsense_mohm) (5120/(rsense_mohm))
+/* Bus voltage: mV per LSB */
+#define INA2XX_BUS_MV(reg) ((reg) * 125 / 100)
+/* Shunt voltage: uV per LSB */
+#define INA2XX_SHUNT_UV(reg) ((reg) * 25 / 10)
+/* Power LSB: mW per current LSB */
+#define INA2XX_POW_MW(reg) ((reg) * 25 * 1/*Current mA/LSB*/)
+
+#else /* CONFIG_INA219 */
+
+/* Calibration value to get current LSB = 1mA */
+#define INA2XX_CALIB_1MA(rsense_mohm) (40960/(rsense_mohm))
+/* Bus voltage: mV per LSB */
+#define INA2XX_BUS_MV(reg) ((reg) / 2)
+/* Shunt voltage: uV per LSB */
+#define INA2XX_SHUNT_UV(reg) ((reg) * 2)
+/* Power LSB: mW per current LSB */
+#define INA2XX_POW_MW(reg) ((reg) * 20 * 1/*Current mA/LSB*/)
+
+#endif
+
+
+/* Read INA2XX register. */
+uint16_t ina2xx_read(uint8_t idx, uint8_t reg);
+
+/* Write INA2XX register. */
+int ina2xx_write(uint8_t idx, uint8_t reg, uint16_t val);
+
+/* Set measurement parameters */
+int ina2xx_init(uint8_t idx, uint16_t config, uint16_t calib);
+
+/* Return bus voltage in milliVolts */
+int ina2xx_get_voltage(uint8_t idx);
+
+/* Return current in milliAmps */
+int ina2xx_get_current(uint8_t idx);
+
+/* Return power in milliWatts */
+int ina2xx_get_power(uint8_t idx);
+
+#endif /* INA2XX_H */