diff options
Diffstat (limited to 'src/osmo-bts-litecell15/misc/lc15bts_power.c')
| -rw-r--r-- | src/osmo-bts-litecell15/misc/lc15bts_power.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/osmo-bts-litecell15/misc/lc15bts_power.c b/src/osmo-bts-litecell15/misc/lc15bts_power.c new file mode 100644 index 00000000..a2997ee2 --- /dev/null +++ b/src/osmo-bts-litecell15/misc/lc15bts_power.c @@ -0,0 +1,167 @@ +/* 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 <stdio.h> +#include <stdint.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <fcntl.h> +#include <limits.h> + +#include "lc15bts_power.h" + +#define LC15BTS_PA_VOLTAGE 24000000 + +#define PA_SUPPLY_MIN_SYSFS "/sys/devices/0.pa-supply/min_microvolts" +#define PA_SUPPLY_MAX_SYSFS "/sys/devices/0.pa-supply/max_microvolts" + +static const char *power_enable_devs[_NUM_POWER_SOURCES] = { + [LC15BTS_POWER_PA1] = "/sys/devices/0.pa1/state", + [LC15BTS_POWER_PA2] = "/sys/devices/0.pa2/state", +}; + +static const char *power_sensor_devs[_NUM_POWER_SOURCES] = { + [LC15BTS_POWER_SUPPLY] = "/sys/bus/i2c/devices/2-0040/hwmon/hwmon6/", + [LC15BTS_POWER_PA1] = "/sys/bus/i2c/devices/2-0044/hwmon/hwmon7/", + [LC15BTS_POWER_PA2] = "/sys/bus/i2c/devices/2-0045/hwmon/hwmon8/", +}; + +static const char *power_sensor_type_str[_NUM_POWER_TYPES] = { + [LC15BTS_POWER_POWER] = "power1_input", + [LC15BTS_POWER_VOLTAGE] = "in1_input", + [LC15BTS_POWER_CURRENT] = "curr1_input", +}; + +int lc15bts_power_sensor_get( + enum lc15bts_power_source source, + enum lc15bts_power_type type) +{ + char buf[PATH_MAX]; + char pwrstr[10]; + int fd, rc; + + if (source >= _NUM_POWER_SOURCES) + return -EINVAL; + + if (type >= _NUM_POWER_TYPES) + return -EINVAL; + + snprintf(buf, sizeof(buf)-1, "%s%s", power_sensor_devs[source], power_sensor_type_str[type]); + buf[sizeof(buf)-1] = '\0'; + + fd = open(buf, O_RDONLY); + if (fd < 0) + return fd; + + rc = read(fd, pwrstr, sizeof(pwrstr)); + pwrstr[sizeof(pwrstr)-1] = '\0'; + if (rc < 0) { + close(fd); + return rc; + } + if (rc == 0) { + close(fd); + return -EIO; + } + close(fd); + + return atoi(pwrstr); +} + + +int lc15bts_power_set( + enum lc15bts_power_source source, + int en) +{ + int fd; + int rc; + + if ((source != LC15BTS_POWER_PA1) + && (source != LC15BTS_POWER_PA2) ) { + return -EINVAL; + } + + fd = open(PA_SUPPLY_MAX_SYSFS, O_WRONLY); + if (fd < 0) { + return fd; + } + rc = write(fd, "32000000", 9); + close( fd ); + + if (rc != 9) { + return -1; + } + + fd = open(PA_SUPPLY_MIN_SYSFS, O_WRONLY); + if (fd < 0) { + return fd; + } + + /* TODO NTQ: Make the voltage configurable */ + rc = write(fd, "24000000", 9); + close( fd ); + + if (rc != 9) { + return -1; + } + + fd = open(power_enable_devs[source], O_WRONLY); + if (fd < 0) { + return fd; + } + rc = write(fd, en?"1":"0", 2); + close( fd ); + + if (rc != 2) { + return -1; + } + + if (en) usleep(50*1000); + + return 0; +} + +int lc15bts_power_get( + enum lc15bts_power_source source) +{ + int fd; + int rc; + char enstr[10]; + + fd = open(power_enable_devs[source], O_RDONLY); + if (fd < 0) { + return fd; + } + + rc = read(fd, enstr, sizeof(enstr)); + enstr[sizeof(enstr)-1] = '\0'; + + close(fd); + + if (rc < 0) { + return rc; + } + if (rc == 0) { + return -EIO; + } + + return atoi(enstr); +} |