/
lte_lc.c
1711 lines (1454 loc) · 42 KB
/
lte_lc.c
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/*
* Copyright (c) 2018 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
*/
#include <zephyr.h>
#include <zephyr/types.h>
#include <errno.h>
#include <net/socket.h>
#include <string.h>
#include <stdio.h>
#include <device.h>
#include <modem/lte_lc.h>
#include <modem/at_cmd.h>
#include <modem/at_cmd_parser.h>
#include <modem/at_params.h>
#include <modem/at_notif.h>
#include <logging/log.h>
LOG_MODULE_REGISTER(lte_lc, CONFIG_LTE_LINK_CONTROL_LOG_LEVEL);
#define LC_MAX_READ_LENGTH 128
#define AT_CMD_SIZE(x) (sizeof(x) - 1)
#define AT_RESPONSE_PREFIX_INDEX 0
#define AT_CFUN_READ "AT+CFUN?"
#define AT_CFUN_RESPONSE_PREFIX "+CFUN"
#define AT_CFUN_MODE_INDEX 1
#define AT_CFUN_PARAMS_COUNT 2
#define AT_CFUN_RESPONSE_MAX_LEN 20
#define AT_CEREG_5 "AT+CEREG=5"
#define AT_CEREG_READ "AT+CEREG?"
#define AT_CEREG_RESPONSE_PREFIX "+CEREG"
#define AT_CEREG_PARAMS_COUNT_MAX 10
#define AT_CEREG_REG_STATUS_INDEX 1
#define AT_CEREG_READ_REG_STATUS_INDEX 2
#define AT_CEREG_TAC_INDEX 2
#define AT_CEREG_READ_TAC_INDEX 3
#define AT_CEREG_CELL_ID_INDEX 3
#define AT_CEREG_READ_CELL_ID_INDEX 4
#define AT_CEREG_ACTIVE_TIME_INDEX 7
#define AT_CEREG_READ_ACTIVE_TIME_INDEX 8
#define AT_CEREG_TAU_INDEX 8
#define AT_CEREG_READ_TAU_INDEX 9
#define AT_CEREG_RESPONSE_MAX_LEN 80
#define AT_XSYSTEMMODE_READ "AT%XSYSTEMMODE?"
#define AT_XSYSTEMMODE_RESPONSE_PREFIX "%XSYSTEMMODE"
#define AT_XSYSTEMMODE_PROTO "AT%%XSYSTEMMODE=%d,%d,%d,%d"
/* The indices are for the set command. Add 1 for the read command indices. */
#define AT_XSYSTEMMODE_LTEM_INDEX 0
#define AT_XSYSTEMMODE_NBIOT_INDEX 1
#define AT_XSYSTEMMODE_GPS_INDEX 2
#define AT_XSYSTEMMODE_PARAMS_COUNT 5
#define AT_XSYSTEMMODE_RESPONSE_MAX_LEN 30
/* CEDRXS command parameters */
#define AT_CEDRXS_MODE_INDEX
#define AT_CEDRXS_ACTT_WB 4
#define AT_CEDRXS_ACTT_NB 5
/* CEDRXP notification parameters */
#define AT_CEDRXP_PARAMS_COUNT_MAX 5
#define AT_CEDRXP_ACTT_INDEX 1
#define AT_CEDRXP_REQ_EDRX_INDEX 2
#define AT_CEDRXP_NW_EDRX_INDEX 3
#define AT_CEDRXP_NW_PTW_INDEX 4
/* CSCON command parameters */
#define AT_CSCON_RESPONSE_PREFIX "+CSCON"
#define AT_CSCON_PARAMS_COUNT_MAX 4
#define AT_CSCON_RRC_MODE_INDEX 1
#define AT_CSCON_READ_RRC_MODE_INDEX 2
#define SYS_MODE_PREFERRED \
(IS_ENABLED(CONFIG_LTE_NETWORK_MODE_LTE_M) ? \
LTE_LC_SYSTEM_MODE_LTEM : \
IS_ENABLED(CONFIG_LTE_NETWORK_MODE_NBIOT) ? \
LTE_LC_SYSTEM_MODE_NBIOT : \
IS_ENABLED(CONFIG_LTE_NETWORK_MODE_LTE_M_GPS) ? \
LTE_LC_SYSTEM_MODE_LTEM_GPS : \
IS_ENABLED(CONFIG_LTE_NETWORK_MODE_NBIOT_GPS) ? \
LTE_LC_SYSTEM_MODE_NBIOT_GPS : \
LTE_LC_SYSTEM_MODE_NONE)
/* Forward declarations */
static int parse_nw_reg_status(const char *at_response,
enum lte_lc_nw_reg_status *status,
size_t reg_status_index);
static int parse_rrc_mode(const char *at_response,
enum lte_lc_rrc_mode *mode,
size_t mode_index);
static int parse_edrx(const char *at_response,
struct lte_lc_edrx_cfg *cfg);
static bool response_is_valid(const char *response, size_t response_len,
const char *check);
static int parse_psm_cfg(struct at_param_list *at_params,
bool is_notif,
struct lte_lc_psm_cfg *psm_cfg);
static lte_lc_evt_handler_t evt_handler;
static bool is_initialized;
#if defined(CONFIG_NRF_MODEM_LIB_TRACE_ENABLED)
/* Enable modem trace */
static const char mdm_trace[] = "AT%XMODEMTRACE=1,2";
#endif
/* Subscribes to notifications with level 5 */
static const char cereg_5_subscribe[] = AT_CEREG_5;
#if defined(CONFIG_LTE_LOCK_BANDS)
/* Lock LTE bands 3, 4, 13 and 20 (volatile setting) */
static const char lock_bands[] = "AT%XBANDLOCK=2,\""CONFIG_LTE_LOCK_BAND_MASK
"\"";
#endif
#if defined(CONFIG_LTE_LOCK_PLMN)
/* Lock PLMN */
static const char lock_plmn[] = "AT+COPS=1,2,\""
CONFIG_LTE_LOCK_PLMN_STRING"\"";
#elif defined(CONFIG_LTE_UNLOCK_PLMN)
/* Unlock PLMN */
static const char unlock_plmn[] = "AT+COPS=0";
#endif
/* Request eDRX to be disabled */
static const char edrx_disable[] = "AT+CEDRXS=3";
/* Default eDRX setting */
static char edrx_param[5] = CONFIG_LTE_EDRX_REQ_VALUE;
/* Default PTW setting */
static char ptw_param[5] = CONFIG_LTE_PTW_VALUE;
/* Default PSM RAT setting */
static char psm_param_rat[9] = CONFIG_LTE_PSM_REQ_RAT;
/* Default PSM RPATU setting */
static char psm_param_rptau[9] = CONFIG_LTE_PSM_REQ_RPTAU;
/* Request PSM to be disabled */
static const char psm_disable[] = "AT+CPSMS=";
/* Set the modem to power off mode */
static const char power_off[] = "AT+CFUN=0";
/* Set the modem to Normal mode */
static const char normal[] = "AT+CFUN=1";
/* Set the modem to Offline mode */
static const char offline[] = "AT+CFUN=4";
/* Enable CSCON (RRC mode) notifications */
static const char cscon[] = "AT+CSCON=1";
/* Disable RAI */
static const char rai_disable[] = "AT+%XRAI=0";
/* Default RAI setting */
static char rai_param[2] = CONFIG_LTE_RAI_REQ_VALUE;
static const enum lte_lc_system_mode sys_mode_preferred = SYS_MODE_PREFERRED;
/* System mode to use when connecting to LTE network, which can be changed in
* two ways:
* - Automatically to fallback mode (if enabled) when connection to the
* preferred mode is unsuccessful and times out.
* - By calling lte_lc_system_mode_set() and set the mode explicitly.
*/
static enum lte_lc_system_mode sys_mode_target = SYS_MODE_PREFERRED;
static const enum lte_lc_system_mode sys_mode_fallback =
#if IS_ENABLED(CONFIG_LTE_NETWORK_USE_FALLBACK)
IS_ENABLED(CONFIG_LTE_NETWORK_MODE_LTE_M) ?
LTE_LC_SYSTEM_MODE_NBIOT :
IS_ENABLED(CONFIG_LTE_NETWORK_MODE_NBIOT) ?
LTE_LC_SYSTEM_MODE_LTEM :
IS_ENABLED(CONFIG_LTE_NETWORK_MODE_LTE_M_GPS) ?
LTE_LC_SYSTEM_MODE_NBIOT_GPS :
IS_ENABLED(CONFIG_LTE_NETWORK_MODE_NBIOT_GPS) ?
LTE_LC_SYSTEM_MODE_LTEM_GPS :
#endif
LTE_LC_SYSTEM_MODE_NONE;
static enum lte_lc_system_mode sys_mode_current = LTE_LC_SYSTEM_MODE_NONE;
/* Parameters to be passed when using AT%XSYSTEMMMODE=<params> */
static const char *const system_mode_params[] = {
[LTE_LC_SYSTEM_MODE_LTEM] = "1,0,0,0",
[LTE_LC_SYSTEM_MODE_NBIOT] = "0,1,0,0",
[LTE_LC_SYSTEM_MODE_GPS] = "0,0,1,0",
[LTE_LC_SYSTEM_MODE_LTEM_GPS] = "1,0,1,0",
[LTE_LC_SYSTEM_MODE_NBIOT_GPS] = "0,1,1,0",
};
#if !defined(CONFIG_NRF_MODEM_LIB_SYS_INIT) && \
defined(CONFIG_BOARD_THINGY91_NRF9160NS)
static const char thingy91_magpio[] = {
"AT%XMAGPIO=1,1,1,7,1,746,803,2,698,748,"
"2,1710,2200,3,824,894,4,880,960,5,791,849,"
"7,1565,1586"
};
#endif /* !CONFIG_NRF_MODEM_LIB_SYS_INIT && CONFIG_BOARD_THINGY91_NRF9160NS */
static struct k_sem link;
#if defined(CONFIG_LTE_PDP_CMD)
static char cgdcont[144] = "AT+CGDCONT="CONFIG_LTE_PDP_CONTEXT;
#endif
#if defined(CONFIG_LTE_PDN_AUTH_CMD)
static char cgauth[19 + CONFIG_LTE_PDN_AUTH_LEN] =
"AT+CGAUTH="CONFIG_LTE_PDN_AUTH;
#endif
#if defined(CONFIG_LTE_LEGACY_PCO_MODE)
static const char legacy_pco[] = "AT%XEPCO=0";
#endif
enum lte_lc_notif_type {
LTE_LC_NOTIF_CEREG,
LTE_LC_NOTIF_CSCON,
LTE_LC_NOTIF_CEDRXP,
LTE_LC_NOTIF_COUNT,
};
static const char *const at_notifs[] = {
[LTE_LC_NOTIF_CEREG] = "+CEREG",
[LTE_LC_NOTIF_CSCON] = "+CSCON",
[LTE_LC_NOTIF_CEDRXP] = "+CEDRXP",
};
BUILD_ASSERT(ARRAY_SIZE(at_notifs) == LTE_LC_NOTIF_COUNT);
static bool is_relevant_notif(const char *notif, enum lte_lc_notif_type *type)
{
for (size_t i = 0; i < ARRAY_SIZE(at_notifs); i++) {
if (strncmp(at_notifs[i], notif,
strlen(at_notifs[i])) == 0) {
/* The notification type matches the array index */
*type = i;
return true;
}
}
return false;
}
static int parse_cereg(const char *notification,
enum lte_lc_nw_reg_status *reg_status,
struct lte_lc_cell *cell,
struct lte_lc_psm_cfg *psm_cfg)
{
int err, status;
struct at_param_list resp_list;
char str_buf[10];
size_t len = sizeof(str_buf) - 1;
err = at_params_list_init(&resp_list, AT_CEREG_PARAMS_COUNT_MAX);
if (err) {
LOG_ERR("Could not init AT params list, error: %d", err);
return err;
}
/* Parse CEREG response and populate AT parameter list */
err = at_parser_params_from_str(notification,
NULL,
&resp_list);
if (err) {
LOG_ERR("Could not parse AT+CEREG response, error: %d", err);
goto clean_exit;
}
/* Parse network registration status */
err = at_params_int_get(&resp_list,
AT_CEREG_REG_STATUS_INDEX,
&status);
if (err) {
LOG_ERR("Could not get registration status, error: %d", err);
goto clean_exit;
}
*reg_status = status;
if ((*reg_status != LTE_LC_NW_REG_UICC_FAIL) &&
(at_params_valid_count_get(&resp_list) > AT_CEREG_CELL_ID_INDEX)) {
/* Parse tracking area code */
err = at_params_string_get(&resp_list,
AT_CEREG_TAC_INDEX,
str_buf, &len);
if (err) {
LOG_ERR("Could not get tracking area code, error: %d", err);
goto clean_exit;
}
str_buf[len] = '\0';
cell->tac = strtoul(str_buf, NULL, 16);
/* Parse cell ID */
len = sizeof(str_buf) - 1;
err = at_params_string_get(&resp_list,
AT_CEREG_CELL_ID_INDEX,
str_buf, &len);
if (err) {
LOG_ERR("Could not get cell ID, error: %d", err);
goto clean_exit;
}
str_buf[len] = '\0';
cell->id = strtoul(str_buf, NULL, 16);
} else {
cell->tac = UINT32_MAX;
cell->id = UINT32_MAX;
}
/* Parse PSM configuration only when registered */
if (((*reg_status == LTE_LC_NW_REG_REGISTERED_HOME) ||
(*reg_status == LTE_LC_NW_REG_REGISTERED_ROAMING)) &&
(at_params_valid_count_get(&resp_list) > AT_CEREG_TAU_INDEX)) {
err = parse_psm_cfg(&resp_list, true, psm_cfg);
if (err) {
LOG_ERR("Failed to parse PSM configuration, error: %d",
err);
goto clean_exit;
}
} else {
/* When device is not registered, PSM valies are invalid */
psm_cfg->tau = -1;
psm_cfg->active_time = -1;
}
clean_exit:
at_params_list_free(&resp_list);
return err;
}
static void at_handler(void *context, const char *response)
{
ARG_UNUSED(context);
int err;
bool notify = false;
enum lte_lc_notif_type notif_type;
struct lte_lc_evt evt;
if (response == NULL) {
LOG_ERR("Response buffer is NULL-pointer");
return;
}
/* Only proceed with parsing if notification is relevant */
if (!is_relevant_notif(response, ¬if_type)) {
return;
}
switch (notif_type) {
case LTE_LC_NOTIF_CEREG: {
static enum lte_lc_nw_reg_status prev_reg_status =
LTE_LC_NW_REG_NOT_REGISTERED;
static struct lte_lc_cell prev_cell;
static struct lte_lc_psm_cfg prev_psm_cfg;
enum lte_lc_nw_reg_status reg_status = 0;
struct lte_lc_cell cell;
struct lte_lc_psm_cfg psm_cfg;
LOG_DBG("+CEREG notification: %s", log_strdup(response));
err = parse_cereg(response, ®_status, &cell, &psm_cfg);
if (err) {
LOG_ERR("Failed to parse notification (error %d): %s",
err, log_strdup(response));
return;
}
if ((reg_status == LTE_LC_NW_REG_REGISTERED_HOME) ||
(reg_status == LTE_LC_NW_REG_REGISTERED_ROAMING)) {
k_sem_give(&link);
}
if (!evt_handler) {
return;
}
/* Network registration status event */
if (reg_status != prev_reg_status) {
prev_reg_status = reg_status;
evt.type = LTE_LC_EVT_NW_REG_STATUS;
evt.nw_reg_status = reg_status;
evt_handler(&evt);
}
/* Cell update event */
if (memcmp(&cell, &prev_cell, sizeof(struct lte_lc_cell))) {
evt.type = LTE_LC_EVT_CELL_UPDATE;
memcpy(&prev_cell, &cell, sizeof(struct lte_lc_cell));
memcpy(&evt.cell, &cell, sizeof(struct lte_lc_cell));
evt_handler(&evt);
}
if ((reg_status != LTE_LC_NW_REG_REGISTERED_HOME) &&
(reg_status != LTE_LC_NW_REG_REGISTERED_ROAMING)) {
return;
}
/* PSM configuration update event */
if (memcmp(&psm_cfg, &prev_psm_cfg,
sizeof(struct lte_lc_psm_cfg))) {
evt.type = LTE_LC_EVT_PSM_UPDATE;
memcpy(&prev_psm_cfg, &psm_cfg,
sizeof(struct lte_lc_psm_cfg));
memcpy(&evt.psm_cfg, &psm_cfg,
sizeof(struct lte_lc_psm_cfg));
evt_handler(&evt);
}
break;
}
case LTE_LC_NOTIF_CSCON:
LOG_DBG("+CSCON notification");
err = parse_rrc_mode(response,
&evt.rrc_mode,
AT_CSCON_RRC_MODE_INDEX);
if (err) {
LOG_ERR("Can't parse signalling mode, error: %d", err);
return;
}
evt.type = LTE_LC_EVT_RRC_UPDATE;
notify = true;
break;
case LTE_LC_NOTIF_CEDRXP:
LOG_DBG("+CEDRXP notification");
err = parse_edrx(response, &evt.edrx_cfg);
if (err) {
LOG_ERR("Can't parse eDRX, error: %d", err);
return;
}
evt.type = LTE_LC_EVT_EDRX_UPDATE;
notify = true;
break;
default:
LOG_ERR("Unrecognized notification type: %d", notif_type);
break;
}
if (evt_handler && notify) {
evt_handler(&evt);
}
}
static int parse_psm_cfg(struct at_param_list *at_params,
bool is_notif,
struct lte_lc_psm_cfg *psm_cfg)
{
int err;
size_t tau_idx = is_notif ? AT_CEREG_TAU_INDEX :
AT_CEREG_READ_TAU_INDEX;
size_t active_time_idx = is_notif ? AT_CEREG_ACTIVE_TIME_INDEX :
AT_CEREG_READ_ACTIVE_TIME_INDEX;
char timer_str[9] = {0};
char unit_str[4] = {0};
size_t timer_str_len = sizeof(timer_str) - 1;
size_t unit_str_len = sizeof(unit_str) - 1;
size_t lut_idx;
uint32_t timer_unit, timer_value;
/* Lookup table for T3324 timer used for PSM active time in seconds.
* Ref: GPRS Timer 2 IE in 3GPP TS 24.008 Table 10.5.163/3GPP TS 24.008.
*/
static const uint32_t t3324_lookup[8] = {2, 60, 600, 60, 60, 60, 60, 0};
/* Lookup table for T3412 timer used for periodic TAU. Unit is seconds.
* Ref: GPRS Timer 3 in 3GPP TS 24.008 Table 10.5.163a/3GPP TS 24.008.
*/
static const uint32_t t3412_lookup[8] = {600, 3600, 36000, 2, 30, 60,
1152000, 0};
/* Parse periodic TAU string */
err = at_params_string_get(at_params,
tau_idx,
timer_str,
&timer_str_len);
if (err) {
LOG_ERR("Could not get TAU, error: %d", err);
return err;
}
memcpy(unit_str, timer_str, unit_str_len);
lut_idx = strtoul(unit_str, NULL, 2);
if (lut_idx > (ARRAY_SIZE(t3412_lookup) - 1)) {
LOG_ERR("Unable to parse periodic TAU string");
err = -EINVAL;
return err;
}
timer_unit = t3412_lookup[lut_idx];
timer_value = strtoul(timer_str + unit_str_len, NULL, 2);
psm_cfg->tau = timer_unit ? timer_unit * timer_value : -1;
/* Parse active time string */
err = at_params_string_get(at_params,
active_time_idx,
timer_str,
&timer_str_len);
if (err) {
LOG_ERR("Could not get TAU, error: %d", err);
return err;
}
memcpy(unit_str, timer_str, unit_str_len);
lut_idx = strtoul(unit_str, NULL, 2);
if (lut_idx > (ARRAY_SIZE(t3324_lookup) - 1)) {
LOG_ERR("Unable to parse active time string");
err = -EINVAL;
return err;
}
timer_unit = t3324_lookup[lut_idx];
timer_value = strtoul(timer_str + unit_str_len, NULL, 2);
psm_cfg->active_time = timer_unit ? timer_unit * timer_value : -1;
LOG_DBG("TAU: %d sec, active time: %d sec\n",
psm_cfg->tau, psm_cfg->active_time);
return 0;
}
static int w_lte_lc_init(void)
{
int err;
if (is_initialized) {
return -EALREADY;
}
k_sem_init(&link, 0, 1);
err = lte_lc_system_mode_get(&sys_mode_current);
if (err) {
LOG_ERR("Could not get current system mode, error: %d", err);
return err;
}
err = at_notif_register_handler(NULL, at_handler);
if (err) {
LOG_ERR("Can't register AT handler, error: %d", err);
return err;
}
if (sys_mode_current != sys_mode_target) {
err = lte_lc_system_mode_set(sys_mode_target);
if (err) {
LOG_ERR("Could not set system mode, error: %d", err);
return err;
}
} else {
LOG_DBG("Preferred system mode (%d) is already configured",
sys_mode_current);
}
#if !defined(CONFIG_NRF_MODEM_LIB_SYS_INIT) && \
defined(CONFIG_BOARD_THINGY91_NRF9160NS)
/* Configuring MAGPIO, so that the correct antenna
* matching network is used for each LTE band and GPS.
*/
if (at_cmd_write(thingy91_magpio, NULL, 0, NULL) != 0) {
return -EIO;
}
#endif
#if defined(CONFIG_LTE_EDRX_REQ)
/* Request configured eDRX settings to save power */
if (lte_lc_edrx_req(true) != 0) {
return -EIO;
}
#endif
#if defined(CONFIG_NRF_MODEM_LIB_TRACE_ENABLED)
if (at_cmd_write(mdm_trace, NULL, 0, NULL) != 0) {
return -EIO;
}
#endif
if (at_cmd_write(cereg_5_subscribe, NULL, 0, NULL) != 0) {
return -EIO;
}
#if defined(CONFIG_LTE_LOCK_BANDS)
/* Set LTE band lock (volatile setting).
* Has to be done every time before activating the modem.
*/
if (at_cmd_write(lock_bands, NULL, 0, NULL) != 0) {
return -EIO;
}
#endif
#if defined(CONFIG_LTE_LOCK_PLMN)
/* Manually select Operator (volatile setting).
* Has to be done every time before activating the modem.
*/
if (at_cmd_write(lock_plmn, NULL, 0, NULL) != 0) {
return -EIO;
}
#elif defined(CONFIG_LTE_UNLOCK_PLMN)
/* Automatically select Operator (volatile setting).
*/
if (at_cmd_write(unlock_plmn, NULL, 0, NULL) != 0) {
return -EIO;
}
#endif
#if defined(CONFIG_LTE_LEGACY_PCO_MODE)
if (at_cmd_write(legacy_pco, NULL, 0, NULL) != 0) {
return -EIO;
}
LOG_INF("Using legacy LTE PCO mode...");
#endif
#if defined(CONFIG_LTE_PDP_CMD)
if (at_cmd_write(cgdcont, NULL, 0, NULL) != 0) {
return -EIO;
}
LOG_INF("PDP Context: %s", log_strdup(cgdcont));
#endif
#if defined(CONFIG_LTE_PDN_AUTH_CMD)
if (at_cmd_write(cgauth, NULL, 0, NULL) != 0) {
return -EIO;
}
LOG_INF("PDN Auth: %s", log_strdup(cgauth));
#endif
/* Listen for RRC connection mode notifications */
err = at_cmd_write(cscon, NULL, 0, NULL);
if (err) {
char buf[50];
/* AT+CSCON is supported from modem firmware v1.1.0, and will
* not work for older versions. If the command fails, RRC
* mode change notifications will not be received. This is not
* considered a critical error, and the error code is therefore
* not returned, while informative log messageas are printed.
*/
LOG_WRN("%s failed (%d), RRC notifications are not enabled",
cscon, err);
LOG_WRN("%s is supported in nRF9160 modem >= v1.1.0", cscon);
err = at_cmd_write("AT+CGMR", buf, sizeof(buf), NULL);
if (err == 0) {
LOG_WRN("Current modem firmware version: %s",
log_strdup(buf));
}
}
is_initialized = true;
return 0;
}
static int w_lte_lc_connect(bool blocking)
{
int err;
bool retry;
if (!is_initialized) {
LOG_ERR("The LTE link controller is not initialized");
return -EPERM;
}
k_sem_init(&link, 0, 1);
do {
retry = false;
err = lte_lc_system_mode_set(sys_mode_target);
if (err) {
return err;
}
err = lte_lc_normal();
if (err || !blocking) {
return err;
}
err = k_sem_take(&link, K_SECONDS(CONFIG_LTE_NETWORK_TIMEOUT));
if (err == -EAGAIN) {
LOG_INF("Network connection attempt timed out");
if (IS_ENABLED(CONFIG_LTE_NETWORK_USE_FALLBACK) &&
(sys_mode_target == sys_mode_preferred)) {
sys_mode_target = sys_mode_fallback;
retry = true;
err = lte_lc_offline();
if (err) {
return err;
}
LOG_INF("Using fallback network mode");
} else {
err = -ETIMEDOUT;
}
}
} while (retry);
return err;
}
static int w_lte_lc_init_and_connect(const struct device *unused)
{
int ret;
ret = w_lte_lc_init();
if (ret) {
return ret;
}
return w_lte_lc_connect(true);
}
/* lte lc Init wrapper */
int lte_lc_init(void)
{
return w_lte_lc_init();
}
void lte_lc_register_handler(lte_lc_evt_handler_t handler)
{
if (handler == NULL) {
evt_handler = NULL;
LOG_INF("Previously registered handler (%p) deregistered",
handler);
return;
}
if (evt_handler) {
LOG_WRN("Replacing previously registered handler (%p) with %p",
evt_handler, handler);
}
evt_handler = handler;
return;
}
/* lte lc Connect wrapper */
int lte_lc_connect(void)
{
return w_lte_lc_connect(true);
}
/* lte lc Init and connect wrapper */
int lte_lc_init_and_connect(void)
{
const struct device *x = 0;
int err = w_lte_lc_init_and_connect(x);
return err;
}
int lte_lc_connect_async(lte_lc_evt_handler_t handler)
{
if (handler) {
evt_handler = handler;
} else if (evt_handler == NULL) {
LOG_ERR("No handler registered");
return -EINVAL;
}
return w_lte_lc_connect(false);
}
int lte_lc_init_and_connect_async(lte_lc_evt_handler_t handler)
{
int err;
err = w_lte_lc_init();
if (err) {
return err;
}
return lte_lc_connect_async(handler);
}
int lte_lc_offline(void)
{
if (at_cmd_write(offline, NULL, 0, NULL) != 0) {
return -EIO;
}
return 0;
}
int lte_lc_power_off(void)
{
if (at_cmd_write(power_off, NULL, 0, NULL) != 0) {
return -EIO;
}
return 0;
}
int lte_lc_deinit(void)
{
if (is_initialized) {
is_initialized = false;
at_notif_deregister_handler(NULL, at_handler);
return lte_lc_power_off();
}
return 0;
}
int lte_lc_normal(void)
{
if (at_cmd_write(normal, NULL, 0, NULL) != 0) {
return -EIO;
}
return 0;
}
int lte_lc_psm_param_set(const char *rptau, const char *rat)
{
if ((rptau != NULL && strlen(rptau) != 8) ||
(rat != NULL && strlen(rat) != 8)) {
return -EINVAL;
}
if (rptau != NULL) {
strcpy(psm_param_rptau, rptau);
LOG_DBG("RPTAU set to %s", log_strdup(psm_param_rptau));
} else {
*psm_param_rptau = '\0';
LOG_DBG("RPTAU use default");
}
if (rat != NULL) {
strcpy(psm_param_rat, rat);
LOG_DBG("RAT set to %s", log_strdup(psm_param_rat));
} else {
*psm_param_rat = '\0';
LOG_DBG("RAT use default");
}
return 0;
}
int lte_lc_psm_req(bool enable)
{
int err;
if (enable) {
char psm_req[40];
if (strlen(psm_param_rptau) == 8 &&
strlen(psm_param_rat) == 8) {
snprintf(psm_req, sizeof(psm_req),
"AT+CPSMS=1,,,\"%s\",\"%s\"",
psm_param_rptau, psm_param_rat);
} else if (strlen(psm_param_rptau) == 8) {
snprintf(psm_req, sizeof(psm_req),
"AT+CPSMS=1,,,\"%s\"",
psm_param_rptau);
} else if (strlen(psm_param_rat) == 8) {
snprintf(psm_req, sizeof(psm_req),
"AT+CPSMS=1,,,,\"%s\"",
psm_param_rat);
} else {
snprintf(psm_req, sizeof(psm_req),
"AT+CPSMS=1");
}
err = at_cmd_write(psm_req, NULL, 0, NULL);
} else {
err = at_cmd_write(psm_disable, NULL, 0, NULL);
}
if (err != 0) {
return -EIO;
}
return 0;
}
int lte_lc_psm_get(int *tau, int *active_time)
{
int err;
struct at_param_list at_resp_list = {0};
char buf[AT_CEREG_RESPONSE_MAX_LEN] = {0};
struct lte_lc_psm_cfg psm_cfg;
if ((tau == NULL) || (active_time == NULL)) {
return -EINVAL;
}
/* Enable network registration status with PSM information */
err = at_cmd_write(AT_CEREG_5, NULL, 0, NULL);
if (err) {
LOG_ERR("Could not set CEREG, error: %d", err);
return err;
}
/* Read network registration status */
err = at_cmd_write(AT_CEREG_READ, buf, sizeof(buf), NULL);
if (err) {
LOG_ERR("Could not get CEREG response, error: %d", err);
return err;
}
err = at_params_list_init(&at_resp_list, AT_CEREG_PARAMS_COUNT_MAX);
if (err) {
LOG_ERR("Could not init AT params list, error: %d", err);
return err;
}
err = at_parser_max_params_from_str(buf,
NULL,
&at_resp_list,
AT_CEREG_PARAMS_COUNT_MAX);
if (err) {
LOG_ERR("Could not parse AT+CEREG response, error: %d", err);
goto parse_psm_clean_exit;
}
err = parse_psm_cfg(&at_resp_list, false, &psm_cfg);
if (err) {
LOG_ERR("Could not obtain PSM configuration");
goto parse_psm_clean_exit;
}
*tau = psm_cfg.tau;
*active_time = psm_cfg.active_time;
LOG_DBG("TAU: %d sec, active time: %d sec\n", *tau, *active_time);
parse_psm_clean_exit:
at_params_list_free(&at_resp_list);
return err;
}
int lte_lc_edrx_param_set(const char *edrx)
{
if (edrx != NULL && strlen(edrx) != 4) {
return -EINVAL;
}
if (edrx != NULL) {
strcpy(edrx_param, edrx);
LOG_DBG("eDRX set to %s", log_strdup(edrx_param));
} else {
*edrx_param = '\0';
LOG_DBG("eDRX use default");
}
return 0;
}
int lte_lc_ptw_set(const char *ptw)
{
if (ptw != NULL && strlen(ptw) != 4) {
return -EINVAL;
}
if (ptw != NULL) {
strcpy(ptw_param, ptw);
LOG_DBG("PTW set to %s", log_strdup(ptw_param));
} else {
*ptw_param = '\0';
LOG_DBG("PTW use default");
}
return 0;
}
int lte_lc_edrx_req(bool enable)
{
int err, actt;
char req[25];
if (sys_mode_current == LTE_LC_SYSTEM_MODE_NONE) {
err = lte_lc_system_mode_get(&sys_mode_current);
if (err) {
return err;
}
}
switch (sys_mode_current) {
case LTE_LC_SYSTEM_MODE_LTEM:
case LTE_LC_SYSTEM_MODE_LTEM_GPS:
actt = AT_CEDRXS_ACTT_WB;
break;
case LTE_LC_SYSTEM_MODE_NBIOT:
case LTE_LC_SYSTEM_MODE_NBIOT_GPS:
actt = AT_CEDRXS_ACTT_NB;
break;
default:
LOG_ERR("Cannot request eDRX for this system mode (%d)",
sys_mode_current);
return -EOPNOTSUPP;
}
if (enable) {
if (strlen(edrx_param) == 4) {
snprintf(req, sizeof(req),
"AT+CEDRXS=2,%d,\"%s\"", actt, edrx_param);
} else {
snprintf(req, sizeof(req),