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/* Copyright (c) 2011 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.
*/
/* Temperature sensor module for Chrome EC */
#include "chip_temp_sensor.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "i2c.h"
#include "host_command.h"
#include "peci.h"
#include "task.h"
#include "temp_sensor.h"
#include "thermal.h"
#include "timer.h"
#include "tmp006.h"
#include "util.h"
/* Defined in board_temp_sensor.c. Must be in the same order as
* in enum temp_sensor_id.
*/
extern const struct temp_sensor_t temp_sensors[TEMP_SENSOR_COUNT];
int temp_sensor_read(enum temp_sensor_id id)
{
const struct temp_sensor_t *sensor;
if (id < 0 || id >= TEMP_SENSOR_COUNT)
return -1;
sensor = temp_sensors + id;
return sensor->read(sensor->idx);
}
int temp_sensor_powered(enum temp_sensor_id id)
{
int flag = temp_sensors[id].power_flags;
if (flag & TEMP_SENSOR_POWER_VS &&
gpio_get_level(GPIO_PGOOD_1_8VS) == 0)
return 0;
if (flag & TEMP_SENSOR_POWER_CPU &&
!chipset_in_state(CHIPSET_STATE_ON))
return 0;
return 1;
}
void poll_slow_sensors(void)
{
/* Poll every second */
#ifdef CONFIG_TMP006
tmp006_poll();
#endif
#ifdef CHIP_lm4
chip_temp_sensor_poll();
#endif
}
static void poll_fast_sensors(void)
{
/* Poll every 1/4 second */
#ifdef CONFIG_PECI
peci_temp_sensor_poll();
#endif
}
static void update_mapped_memory(void)
{
int i, t;
uint8_t *mapped = host_get_memmap(EC_MEMMAP_TEMP_SENSOR);
memset(mapped, 0xff, 16);
for (i = 0; i < TEMP_SENSOR_COUNT && i < 16; ++i) {
if (!temp_sensor_powered(i)) {
mapped[i] = 0xfd;
continue;
}
t = temp_sensor_read(i);
if (t != -1)
mapped[i] = t - EC_TEMP_SENSOR_OFFSET;
else
mapped[i] = 0xfe;
}
}
void temp_sensor_task(void)
{
int i;
/* Switch data is now present */
*host_get_memmap(EC_MEMMAP_THERMAL_VERSION) = 1;
while (1) {
for (i = 0; i < 4; ++i) {
usleep(250000);
poll_fast_sensors();
}
poll_slow_sensors();
update_mapped_memory();
}
}
/*****************************************************************************/
/* Console commands */
static int command_temps(int argc, char **argv)
{
int i;
int rv = EC_SUCCESS;
int t;
for (i = 0; i < TEMP_SENSOR_COUNT; ++i) {
ccprintf(" %-20s: ", temp_sensors[i].name);
t = temp_sensor_read(i);
if (t < 0) {
ccprintf("Error\n");
rv = EC_ERROR_UNKNOWN;
} else
ccprintf("%d K = %d C\n", t, t - 273);
}
return rv;
}
DECLARE_CONSOLE_COMMAND(temps, command_temps,
NULL,
"Print temp sensors",
NULL);
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