diff options
Diffstat (limited to 'src/osmo-bts-litecell15/misc/lc15bts_clock.c')
| -rw-r--r-- | src/osmo-bts-litecell15/misc/lc15bts_clock.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/src/osmo-bts-litecell15/misc/lc15bts_clock.c b/src/osmo-bts-litecell15/misc/lc15bts_clock.c new file mode 100644 index 00000000..71701496 --- /dev/null +++ b/src/osmo-bts-litecell15/misc/lc15bts_clock.c @@ -0,0 +1,260 @@ +/* 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 "lc15bts_clock.h" + +#define CLKERR_ERR_SYSFS "/var/lc15/clkerr/clkerr1_average" +#define CLKERR_ACC_SYSFS "/var/lc15/clkerr/clkerr1_average_accuracy" +#define CLKERR_INT_SYSFS "/var/lc15/clkerr/clkerr1_average_interval" +#define CLKERR_FLT_SYSFS "/var/lc15/clkerr/clkerr1_fault" +#define CLKERR_RFS_SYSFS "/var/lc15/clkerr/refresh" +#define CLKERR_RST_SYSFS "/var/lc15/clkerr/reset" + +#define OCXODAC_VAL_SYSFS "/var/lc15/ocxo/voltage" +#define OCXODAC_ROM_SYSFS "/var/lc15/ocxo/eeprom" + +/* clock error */ +static int clkerr_fd_err = -1; +static int clkerr_fd_accuracy = -1; +static int clkerr_fd_interval = -1; +static int clkerr_fd_fault = -1; +static int clkerr_fd_refresh = -1; +static int clkerr_fd_reset = -1; + +/* ocxo dac */ +static int ocxodac_fd_value = -1; +static int ocxodac_fd_save = -1; + + +static int sysfs_read_val(int fd, int *val) +{ + int rc; + char szVal[32] = {0}; + + lseek( fd, 0, SEEK_SET ); + + rc = read(fd, szVal, sizeof(szVal) - 1); + if (rc < 0) { + return -errno; + } + + rc = sscanf(szVal, "%d", val); + if (rc != 1) { + return -1; + } + + return 0; +} + +static int sysfs_write_val(int fd, int val) +{ + int n, rc; + char szVal[32] = {0}; + + n = sprintf(szVal, "%d", val); + + lseek(fd, 0, SEEK_SET); + rc = write(fd, szVal, n+1); + if (rc < 0) { + return -errno; + } + return 0; +} + +static int sysfs_write_str(int fd, const char *str) +{ + int rc; + + lseek( fd, 0, SEEK_SET ); + rc = write(fd, str, strlen(str)+1); + if (rc < 0) { + return -errno; + } + return 0; +} + + +int lc15bts_clock_err_open(void) +{ + if (clkerr_fd_err < 0) { + clkerr_fd_err = open(CLKERR_ERR_SYSFS, O_RDONLY); + if (clkerr_fd_err < 0) { + lc15bts_clock_err_close(); + return clkerr_fd_err; + } + } + + if (clkerr_fd_accuracy < 0) { + clkerr_fd_accuracy = open(CLKERR_ACC_SYSFS, O_RDONLY); + if (clkerr_fd_accuracy < 0) { + lc15bts_clock_err_close(); + return clkerr_fd_accuracy; + } + } + + if (clkerr_fd_interval < 0) { + clkerr_fd_interval = open(CLKERR_INT_SYSFS, O_RDONLY); + if (clkerr_fd_interval < 0) { + lc15bts_clock_err_close(); + return clkerr_fd_interval; + } + } + + if (clkerr_fd_fault < 0) { + clkerr_fd_fault = open(CLKERR_FLT_SYSFS, O_RDONLY); + if (clkerr_fd_fault < 0) { + lc15bts_clock_err_close(); + return clkerr_fd_fault; + } + } + + if (clkerr_fd_refresh < 0) { + clkerr_fd_refresh = open(CLKERR_RFS_SYSFS, O_WRONLY); + if (clkerr_fd_refresh < 0) { + lc15bts_clock_err_close(); + return clkerr_fd_refresh; + } + } + + if (clkerr_fd_reset < 0) { + clkerr_fd_reset = open(CLKERR_RST_SYSFS, O_WRONLY); + if (clkerr_fd_reset < 0) { + lc15bts_clock_err_close(); + return clkerr_fd_reset; + } + } + return 0; +} + +void lc15bts_clock_err_close(void) +{ + if (clkerr_fd_err >= 0) { + close(clkerr_fd_err); + clkerr_fd_err = -1; + } + + if (clkerr_fd_accuracy >= 0) { + close(clkerr_fd_accuracy); + clkerr_fd_accuracy = -1; + } + + if (clkerr_fd_interval >= 0) { + close(clkerr_fd_interval); + clkerr_fd_interval = -1; + } + + if (clkerr_fd_fault >= 0) { + close(clkerr_fd_fault); + clkerr_fd_fault = -1; + } + + if (clkerr_fd_refresh >= 0) { + close(clkerr_fd_refresh); + clkerr_fd_refresh = -1; + } + + if (clkerr_fd_reset >= 0) { + close(clkerr_fd_reset); + clkerr_fd_reset = -1; + } +} + +int lc15bts_clock_err_reset(void) +{ + return sysfs_write_val(clkerr_fd_reset, 1); +} + +int lc15bts_clock_err_get(int *fault, int *error_ppt, + int *accuracy_ppq, int *interval_sec) +{ + int rc; + + rc = sysfs_write_str(clkerr_fd_refresh, "once"); + if (rc < 0) { + return -1; + } + + rc = sysfs_read_val(clkerr_fd_fault, fault); + rc |= sysfs_read_val(clkerr_fd_err, error_ppt); + rc |= sysfs_read_val(clkerr_fd_accuracy, accuracy_ppq); + rc |= sysfs_read_val(clkerr_fd_interval, interval_sec); + if (rc) { + return -1; + } + return 0; +} + + +int lc15bts_clock_dac_open(void) +{ + if (ocxodac_fd_value < 0) { + ocxodac_fd_value = open(OCXODAC_VAL_SYSFS, O_RDWR); + if (ocxodac_fd_value < 0) { + lc15bts_clock_dac_close(); + return ocxodac_fd_value; + } + } + + if (ocxodac_fd_save < 0) { + ocxodac_fd_save = open(OCXODAC_ROM_SYSFS, O_WRONLY); + if (ocxodac_fd_save < 0) { + lc15bts_clock_dac_close(); + return ocxodac_fd_save; + } + } + return 0; +} + +void lc15bts_clock_dac_close(void) +{ + if (ocxodac_fd_value >= 0) { + close(ocxodac_fd_value); + ocxodac_fd_value = -1; + } + + if (ocxodac_fd_save >= 0) { + close(ocxodac_fd_save); + ocxodac_fd_save = -1; + } +} + +int lc15bts_clock_dac_get(int *dac_value) +{ + return sysfs_read_val(ocxodac_fd_value, dac_value); +} + +int lc15bts_clock_dac_set(int dac_value) +{ + return sysfs_write_val(ocxodac_fd_value, dac_value); +} + +int lc15bts_clock_dac_save(void) +{ + return sysfs_write_val(ocxodac_fd_save, 1); +} + + |