mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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000a6d5742
Refactor board/chip-specific code into corresponding directories. Add support of the four I2C temp sensor in Link. Use table lookup to handle different types of temperature sensors. BUG=chrome-os-partner:7527 TEST=Correctly read EC internal temperature on bds. Compile for link succeeded. Change-Id: I694cfa54e1545798d877fafdf18c5585ab5f03e2
143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
/* Copyright (c) 2011 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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/* Temperature sensor module for Chrome EC */
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#include "i2c.h"
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#include "temp_sensor.h"
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#include "uart.h"
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#include "util.h"
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#include "console.h"
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#include "board.h"
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/* Defined in board_temp_sensor.c. Must be in the same order as
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* in enum temp_sensor_id.
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*/
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extern const struct temp_sensor_t temp_sensors[TEMP_SENSOR_COUNT];
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int temp_sensor_read(enum temp_sensor_id id)
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{
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const struct temp_sensor_t *sensor;
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if (id < 0 || id >= TEMP_SENSOR_COUNT)
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return -1;
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sensor = temp_sensors + id;
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return sensor->read(sensor);
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}
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int temp_sensor_tmp006_read(const struct temp_sensor_t* sensor)
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{
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int traw, t;
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int rv;
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int addr = sensor->addr;
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rv = i2c_read16(TMP006_PORT(addr), TMP006_REG(addr), 0x01, &traw);
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if (rv)
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return -1;
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t = (int)(int16_t)traw / 128;
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return t + 273;
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}
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void temp_sensor_tmp006_config(const struct temp_sensor_t* sensor)
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{
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int addr = sensor->addr;
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/* Configure the sensor:
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* 0x7000 = bits 14:12 = continuous conversion
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* 0x0400 = bits 11:9 = ADC conversion rate (1/sec)
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* 0x0100 = bit 8 = DRDY pin enabled */
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/* TODO: support shutdown mode for power-saving? */
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i2c_write16(TMP006_PORT(addr), TMP006_REG(addr), 0x02, 0x7500);
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}
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int temp_sensor_tmp006_print(const struct temp_sensor_t* sensor)
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{
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int vraw, v;
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int traw, t;
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int rv;
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int d;
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int addr = sensor->addr;
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uart_printf("Debug data from %s:\n", sensor->name);
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rv = i2c_read16(TMP006_PORT(addr), TMP006_REG(addr), 0xfe, &d);
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if (rv)
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return rv;
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uart_printf(" Manufacturer ID: 0x%04x\n", d);
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rv = i2c_read16(TMP006_PORT(addr), TMP006_REG(addr), 0xff, &d);
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uart_printf(" Device ID: 0x%04x\n", d);
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rv = i2c_read16(TMP006_PORT(addr), TMP006_REG(addr), 0x02, &d);
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uart_printf(" Config: 0x%04x\n", d);
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rv = i2c_read16(TMP006_PORT(addr), TMP006_REG(addr), 0x00, &vraw);
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v = ((int)(int16_t)vraw * 15625) / 100;
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uart_printf(" Voltage: 0x%04x = %d nV\n", vraw, v);
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rv = i2c_read16(TMP006_PORT(addr), TMP006_REG(addr), 0x01, &traw);
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t = ((int)(int16_t)traw * 100) / 128;
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uart_printf(" Temperature: 0x%04x = %d.%02d C\n",
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traw, t / 100, t > 0 ? t % 100 : 100 - (t % 100));
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return EC_SUCCESS;
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}
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/*****************************************************************************/
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/* Console commands */
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static int command_temps(int argc, char **argv)
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{
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int i;
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int rv = 0;
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int t;
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uart_puts("Reading temperature sensors...\n");
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for (i = 0; i < TEMP_SENSOR_COUNT; ++i) {
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uart_printf(" Temp from %s: ", temp_sensors[i].name);
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t = temp_sensor_read(temp_sensors[i].id);
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if (t < 0) {
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uart_printf("Error.\n\n");
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rv = -1;
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}
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else
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uart_printf("%d K\n\n", t);
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}
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if (rv == -1)
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return EC_ERROR_UNKNOWN;
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(temps, command_temps);
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static int command_sensor_info(int argc, char ** argv)
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{
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int i;
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int rv;
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const struct temp_sensor_t* sensor;
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for (i = 0; i < TEMP_SENSOR_COUNT; ++i) {
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sensor = temp_sensors + i;
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if (sensor->print == TEMP_SENSOR_NO_PRINT)
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continue;
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rv = sensor->print(sensor);
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if (rv != EC_SUCCESS)
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return rv;
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}
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(tempsinfo, command_sensor_info);
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/*****************************************************************************/
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/* Initialization */
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int temp_sensor_init(void)
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{
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return EC_SUCCESS;
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}
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