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/* Copyright (c) 2013 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.
*/
/* G781 temperature sensor module for Chrome EC */
#include "common.h"
#include "console.h"
#include "i2c.h"
#include "hooks.h"
#include "temp_sensor_g781.h"
#include "util.h"
static int g781_temp_val_local;
static int g781_temp_val_remote;
static int g781_read8(const int offset, int *data_ptr)
{
return i2c_read8(I2C_PORT_THERMAL, G781_I2C_ADDR, offset, data_ptr);
}
static int g781_write8(const int offset, int data)
{
return i2c_write8(I2C_PORT_THERMAL, G781_I2C_ADDR, offset, data);
}
static int g781_get_temp(const int offset, int *temp_ptr)
{
int rv;
int temp_raw = 0;
rv = g781_read8(offset, &temp_raw);
if (rv < 0)
return rv;
*temp_ptr = (int)(int8_t)temp_raw;
return EC_SUCCESS;
}
static int g781_set_temp(const int offset, int temp)
{
if (temp < -127 || temp > 127)
return EC_ERROR_INVAL;
return g781_write8(offset, (uint8_t)temp);
}
int g781_get_val(int idx, int *temp_ptr)
{
if (!board_g781_has_power())
return EC_ERROR_NOT_POWERED;
switch (idx) {
case G781_IDX_INTERNAL:
*temp_ptr = g781_temp_val_local;
break;
case G781_IDX_EXTERNAL:
*temp_ptr = g781_temp_val_remote;
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
static void g781_temp_sensor_poll(void)
{
if (!board_g781_has_power())
return;
g781_get_temp(G781_TEMP_LOCAL, &g781_temp_val_local);
g781_temp_val_local = C_TO_K(g781_temp_val_local);
g781_get_temp(G781_TEMP_REMOTE, &g781_temp_val_remote);
g781_temp_val_remote = C_TO_K(g781_temp_val_remote);
}
DECLARE_HOOK(HOOK_SECOND, g781_temp_sensor_poll, HOOK_PRIO_TEMP_SENSOR);
static int g781_show_status(void)
{
int value;
int rv;
rv = g781_get_temp(G781_TEMP_LOCAL, &value);
if (rv < 0)
return rv;
ccprintf("Local Temp: %3dC\n", value);
rv = g781_get_temp(G781_LOCAL_TEMP_THERM_LIMIT, &value);
if (rv < 0)
return rv;
ccprintf(" Therm Trip: %3dC\n", value);
rv = g781_get_temp(G781_LOCAL_TEMP_HIGH_LIMIT_R, &value);
if (rv < 0)
return rv;
ccprintf(" High Alarm: %3dC\n", value);
rv = g781_get_temp(G781_LOCAL_TEMP_LOW_LIMIT_R, &value);
if (rv < 0)
return rv;
ccprintf(" Low Alarm: %3dC\n", value);
rv = g781_get_temp(G781_TEMP_REMOTE, &value);
if (rv < 0)
return rv;
ccprintf("Remote Temp: %3dC\n", value);
rv = g781_get_temp(G781_REMOTE_TEMP_THERM_LIMIT, &value);
if (rv < 0)
return rv;
ccprintf(" Therm Trip: %3dC\n", value);
rv = g781_get_temp(G781_REMOTE_TEMP_HIGH_LIMIT_R, &value);
if (rv < 0)
return rv;
ccprintf(" High Alarm: %3dC\n", value);
rv = g781_get_temp(G781_REMOTE_TEMP_LOW_LIMIT_R, &value);
if (rv < 0)
return rv;
ccprintf(" Low Alarm: %3dC\n", value);
rv = g781_read8(G781_STATUS, &value);
if (rv < 0)
return rv;
ccprintf("\nSTATUS: %08b\n", value);
rv = g781_read8(G781_CONFIGURATION_R, &value);
if (rv < 0)
return rv;
ccprintf("CONFIG: %08b\n", value);
return EC_SUCCESS;
}
static int command_g781(int argc, char **argv)
{
char *command;
char *e;
int data;
int offset;
int rv;
if (!board_g781_has_power()) {
ccprintf("ERROR: Temp sensor not powered.\n");
return EC_ERROR_NOT_POWERED;
}
/* If no args just print status */
if (argc == 1)
return g781_show_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 = g781_read8(offset, &data);
if (rv < 0)
return rv;
ccprintf("Byte at offset 0x%02x is %08b\n", offset, data);
return rv;
}
/* Remaining commands are of the form "g781 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 = g781_set_temp(offset, data);
} else if (!strcasecmp(command, "setbyte")) {
ccprintf("Setting 0x%02x to 0x%02x\n", offset, data);
rv = g781_write8(offset, data);
} else
return EC_ERROR_PARAM1;
return rv;
}
DECLARE_CONSOLE_COMMAND(g781, command_g781,
"[settemp|setbyte <offset> <value>] or [getbyte <offset>]. "
"Temps in Celsius.",
"Print g781 temp sensor status or set parameters.", NULL);
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