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/* Copyright (C) 2015 by Yves Godin <support@nuranwireless.com>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <osmocom/core/utils.h>
#include "lc15bts_temp.h"
static const char *temp_devs[_NUM_TEMP_SENSORS] = {
[LC15BTS_TEMP_SUPPLY] = "/sys/bus/i2c/devices/2-004d/hwmon/hwmon5/temp1_",
[LC15BTS_TEMP_SOC] = "/sys/class/hwmon/hwmon1/temp1_",
[LC15BTS_TEMP_FPGA] = "/sys/devices/0.iio_hwmon/temp1_",
[LC15BTS_TEMP_MEMORY] = "/sys/bus/i2c/devices/2-004c/hwmon/hwmon4/temp1_",
[LC15BTS_TEMP_TX1] = "/sys/devices/0.ncp15xh103_tx1/temp1_",
[LC15BTS_TEMP_TX2] = "/sys/devices/0.ncp15xh103_tx2/temp1_",
[LC15BTS_TEMP_PA1] = "/sys/bus/i2c/devices/2-004d/hwmon/hwmon5/temp2_",
[LC15BTS_TEMP_PA2] = "/sys/bus/i2c/devices/2-004c/hwmon/hwmon4/temp2_",
};
static const int temp_has_fault[_NUM_TEMP_SENSORS] = {
[LC15BTS_TEMP_PA1] = 1,
[LC15BTS_TEMP_PA2] = 1,
};
static const char *temp_type_str[_NUM_TEMP_TYPES] = {
[LC15BTS_TEMP_INPUT] = "input",
[LC15BTS_TEMP_LOWEST] = "lowest",
[LC15BTS_TEMP_HIGHEST] = "highest",
[LC15BTS_TEMP_FAULT] = "fault",
};
int lc15bts_temp_get(enum lc15bts_temp_sensor sensor,
enum lc15bts_temp_type type)
{
char buf[PATH_MAX];
char tempstr[8];
char faultstr[8];
int fd, rc;
if (sensor < 0 || sensor >= _NUM_TEMP_SENSORS)
return -EINVAL;
if (type >= ARRAY_SIZE(temp_type_str))
return -EINVAL;
snprintf(buf, sizeof(buf)-1, "%s%s", temp_devs[sensor], temp_type_str[type]);
buf[sizeof(buf)-1] = '\0';
fd = open(buf, O_RDONLY);
if (fd < 0)
return fd;
rc = read(fd, tempstr, sizeof(tempstr));
tempstr[sizeof(tempstr)-1] = '\0';
if (rc < 0) {
close(fd);
return rc;
}
if (rc == 0) {
close(fd);
return -EIO;
}
close(fd);
// Check fault
if (type == LC15BTS_TEMP_FAULT || !temp_has_fault[sensor])
return atoi(tempstr);
snprintf(buf, sizeof(buf)-1, "%s%s", temp_devs[sensor], temp_type_str[LC15BTS_TEMP_FAULT]);
buf[sizeof(buf)-1] = '\0';
fd = open(buf, O_RDONLY);
if (fd < 0)
return fd;
rc = read(fd, faultstr, sizeof(faultstr));
tempstr[sizeof(faultstr)-1] = '\0';
if (rc < 0) {
close(fd);
return rc;
}
if (rc == 0) {
close(fd);
return -EIO;
}
close(fd);
if (atoi(faultstr))
return -EIO;
return atoi(tempstr);
}
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