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/* Copyright 2019 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.
*/
/* G753 temperature sensor module for Chrome EC */
#include "common.h"
#include "console.h"
#include "g753.h"
#include "gpio.h"
#include "i2c.h"
#include "hooks.h"
#include "util.h"
static int temp_val_local;
/**
* Determine whether the sensor is powered.
*
* @return non-zero the g753 sensor is powered.
*/
static int has_power(void)
{
#ifdef CONFIG_TEMP_SENSOR_POWER_GPIO
return gpio_get_level(CONFIG_TEMP_SENSOR_POWER_GPIO);
#else
return 1;
#endif
}
static int raw_read8(const int offset, int *data_ptr)
{
return i2c_read8(I2C_PORT_THERMAL, G753_I2C_ADDR_FLAGS,
offset, data_ptr);
}
#ifdef CONFIG_CMD_TEMP_SENSOR
static int raw_write8(const int offset, int data)
{
return i2c_write8(I2C_PORT_THERMAL, G753_I2C_ADDR_FLAGS,
offset, data);
}
#endif
static int get_temp(const int offset, int *temp_ptr)
{
int rv;
int temp_raw = 0;
rv = raw_read8(offset, &temp_raw);
if (rv < 0)
return rv;
*temp_ptr = (int)(int8_t)temp_raw;
return EC_SUCCESS;
}
#ifdef CONFIG_CMD_TEMP_SENSOR
static int set_temp(const int offset, int temp)
{
if (temp < -127 || temp > 127)
return EC_ERROR_INVAL;
return raw_write8(offset, (uint8_t)temp);
}
#endif
int g753_get_val(int idx, int *temp_ptr)
{
if (!has_power())
return EC_ERROR_NOT_POWERED;
switch (idx) {
case G753_IDX_INTERNAL:
*temp_ptr = temp_val_local;
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
static void temp_sensor_poll(void)
{
if (!has_power())
return;
get_temp(G753_TEMP_LOCAL, &temp_val_local);
temp_val_local = C_TO_K(temp_val_local);
}
DECLARE_HOOK(HOOK_SECOND, temp_sensor_poll, HOOK_PRIO_TEMP_SENSOR);
#ifdef CONFIG_CMD_TEMP_SENSOR
static void print_temps(const char *name,
const int temp_reg,
const int high_limit_reg)
{
int value;
ccprintf("%s:\n", name);
if (get_temp(temp_reg, &value) == EC_SUCCESS)
ccprintf(" Temp: %3dC\n", value);
if (get_temp(high_limit_reg, &value) == EC_SUCCESS)
ccprintf(" High Alarm: %3dC\n", value);
}
static int print_status(void)
{
int value;
if (!has_power()) {
ccprintf("ERROR: Temp sensor not powered.\n");
return EC_ERROR_NOT_POWERED;
}
print_temps("Local", G753_TEMP_LOCAL,
G753_LOCAL_TEMP_HIGH_LIMIT_R);
ccprintf("\n");
if (raw_read8(G753_STATUS, &value) == EC_SUCCESS)
ccprintf("STATUS: %pb\n", BINARY_VALUE(value, 8));
if (raw_read8(G753_CONFIGURATION_R, &value) == EC_SUCCESS)
ccprintf("CONFIG: %pb\n", BINARY_VALUE(value, 8));
return EC_SUCCESS;
}
static int command_g753(int argc, char **argv)
{
char *command;
char *e;
int data;
int offset;
int rv;
if (!has_power()) {
ccprintf("ERROR: Temp sensor not powered.\n");
return EC_ERROR_NOT_POWERED;
}
/* If no args just print status */
if (argc == 1)
return print_status();
if (argc < 3)
return EC_ERROR_PARAM_COUNT;
command = argv[1];
offset = strtoi(argv[2], &e, 0);
if (*e || offset < 0 || offset > 255)
return EC_ERROR_PARAM2;
if (!strcasecmp(command, "getbyte")) {
rv = raw_read8(offset, &data);
if (rv < 0)
return rv;
ccprintf("Byte at offset 0x%02x is %pb\n",
offset, BINARY_VALUE(data, 8));
return rv;
}
/* Remaining commands are of the form "g753 set-command offset data" */
if (argc != 4)
return EC_ERROR_PARAM_COUNT;
data = strtoi(argv[3], &e, 0);
if (*e)
return EC_ERROR_PARAM3;
if (!strcasecmp(command, "settemp")) {
ccprintf("Setting 0x%02x to %dC\n", offset, data);
rv = set_temp(offset, data);
} else if (!strcasecmp(command, "setbyte")) {
ccprintf("Setting 0x%02x to 0x%02x\n", offset, data);
rv = raw_write8(offset, data);
} else
return EC_ERROR_PARAM1;
return rv;
}
DECLARE_CONSOLE_COMMAND(g753, command_g753,
"[settemp|setbyte <offset> <value>] or [getbyte <offset>]. "
"Temps in Celsius.",
"Print g753 temp sensor status or set parameters.");
#endif
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