blob: fca790e2559e2eedfe9187ea7e35ac80d48048fd [file] [log] [blame]
/** @file
* @brief Modem command handler header file.
*
* Text-based command handler implementation for modem context driver.
*/
/*
* Copyright (c) 2019 Foundries.io
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_DRIVERS_MODEM_MODEM_CMD_HANDLER_H_
#define ZEPHYR_INCLUDE_DRIVERS_MODEM_MODEM_CMD_HANDLER_H_
#include <kernel.h>
#include "modem_context.h"
#ifdef __cplusplus
extern "C" {
#endif
#define MODEM_CMD_DEFINE(name_) \
static int name_(struct modem_cmd_handler_data *data, uint16_t len, \
uint8_t **argv, uint16_t argc)
#define MODEM_CMD(cmd_, func_cb_, acount_, adelim_) { \
.cmd = cmd_, \
.cmd_len = (uint16_t)sizeof(cmd_)-1, \
.func = func_cb_, \
.arg_count_min = acount_, \
.arg_count_max = acount_, \
.delim = adelim_, \
.direct = false, \
}
#define MODEM_CMD_ARGS_MAX(cmd_, func_cb_, acount_, acountmax_, adelim_) { \
.cmd = cmd_, \
.cmd_len = (uint16_t)sizeof(cmd_)-1, \
.func = func_cb_, \
.arg_count_min = acount_, \
.arg_count_max = acountmax_, \
.delim = adelim_, \
.direct = false, \
}
#define MODEM_CMD_DIRECT_DEFINE(name_) MODEM_CMD_DEFINE(name_)
#define MODEM_CMD_DIRECT(cmd_, func_cb_) { \
.cmd = cmd_, \
.cmd_len = (uint16_t)sizeof(cmd_)-1, \
.func = func_cb_, \
.arg_count_min = 0, \
.arg_count_max = 0, \
.delim = "", \
.direct = true, \
}
#define CMD_RESP 0
#define CMD_UNSOL 1
#define CMD_HANDLER 2
#define CMD_MAX 3
/*
* Flags for modem_send_cmd_ext.
*/
#define MODEM_NO_TX_LOCK BIT(0)
#define MODEM_NO_SET_CMDS BIT(1)
#define MODEM_NO_UNSET_CMDS BIT(2)
struct modem_cmd_handler_data;
struct modem_cmd {
int (*func)(struct modem_cmd_handler_data *data, uint16_t len,
uint8_t **argv, uint16_t argc);
const char *cmd;
const char *delim;
uint16_t cmd_len;
uint16_t arg_count_min;
uint16_t arg_count_max;
bool direct;
};
#define SETUP_CMD(cmd_send_, match_cmd_, func_cb_, num_param_, delim_) { \
.send_cmd = cmd_send_, \
MODEM_CMD(match_cmd_, func_cb_, num_param_, delim_) \
}
#define SETUP_CMD_NOHANDLE(send_cmd_) \
SETUP_CMD(send_cmd_, NULL, NULL, 0U, NULL)
/* series of modem setup commands to run */
struct setup_cmd {
const char *send_cmd;
struct modem_cmd handle_cmd;
};
struct modem_cmd_handler_data {
const struct modem_cmd *cmds[CMD_MAX];
size_t cmds_len[CMD_MAX];
char *match_buf;
size_t match_buf_len;
int last_error;
const char *eol;
size_t eol_len;
/* rx net buffer */
struct net_buf *rx_buf;
/* allocation info */
struct net_buf_pool *buf_pool;
k_timeout_t alloc_timeout;
/* locks */
struct k_sem sem_tx_lock;
struct k_sem sem_parse_lock;
};
/**
* @brief get the last error code
*
* @param *data: command handler data reference
*
* @retval last handled error.
*/
int modem_cmd_handler_get_error(struct modem_cmd_handler_data *data);
/**
* @brief set the last error code
*
* @param *data: command handler data reference
* @param *error_code: error
*
* @retval 0 if ok, < 0 if error.
*/
int modem_cmd_handler_set_error(struct modem_cmd_handler_data *data,
int error_code);
/**
* @brief update the parser's handler commands
*
* @param *data: handler data to use
* @param *handler_cmds: commands to attach
* @param handler_cmds_len: size of commands array
* @param reset_error_flag: reset last error code
*
* @retval 0 if ok, < 0 if error.
*/
int modem_cmd_handler_update_cmds(struct modem_cmd_handler_data *data,
const struct modem_cmd *handler_cmds,
size_t handler_cmds_len,
bool reset_error_flag);
/**
* @brief send AT command to interface with behavior defined by flags
*
* This function is similar to @ref modem_cmd_send, but it allows to choose a
* specific behavior regarding acquiring tx_lock, setting and unsetting
* @a handler_cmds.
*
* @param *iface: interface to use
* @param *handler: command handler to use
* @param *buf: NULL terminated send buffer
* @param *sem: wait for response semaphore
* @param timeout: timeout of command
* @param flags: flags which influence behavior of command sending
*
* @retval 0 if ok, < 0 if error.
*/
int modem_cmd_send_ext(struct modem_iface *iface,
struct modem_cmd_handler *handler,
const struct modem_cmd *handler_cmds,
size_t handler_cmds_len, const uint8_t *buf,
struct k_sem *sem, k_timeout_t timeout, int flags);
/**
* @brief send AT command to interface w/o locking TX
*
* @param *iface: interface to use
* @param *handler: command handler to use
* @param *buf: NULL terminated send buffer
* @param *sem: wait for response semaphore
* @param timeout: timeout of command
*
* @retval 0 if ok, < 0 if error.
*/
static inline int modem_cmd_send_nolock(struct modem_iface *iface,
struct modem_cmd_handler *handler,
const struct modem_cmd *handler_cmds,
size_t handler_cmds_len,
const uint8_t *buf, struct k_sem *sem,
k_timeout_t timeout)
{
return modem_cmd_send_ext(iface, handler, handler_cmds,
handler_cmds_len, buf, sem, timeout,
MODEM_NO_TX_LOCK);
}
/**
* @brief send AT command to interface w/ a TX lock
*
* @param *iface: interface to use
* @param *handler: command handler to use
* @param *buf: NULL terminated send buffer
* @param *sem: wait for response semaphore
* @param timeout: timeout of command
*
* @retval 0 if ok, < 0 if error.
*/
static inline int modem_cmd_send(struct modem_iface *iface,
struct modem_cmd_handler *handler,
const struct modem_cmd *handler_cmds,
size_t handler_cmds_len, const uint8_t *buf,
struct k_sem *sem, k_timeout_t timeout)
{
return modem_cmd_send_ext(iface, handler, handler_cmds,
handler_cmds_len, buf, sem, timeout, 0);
}
/**
* @brief send a series of AT commands w/ a TX lock
*
* @param *iface: interface to use
* @param *handler: command handler to use
* @param *cmds: array of setup commands to send
* @param cmds_len: size of the setup command array
* @param *sem: wait for response semaphore
* @param timeout: timeout of command
*
* @retval 0 if ok, < 0 if error.
*/
int modem_cmd_handler_setup_cmds(struct modem_iface *iface,
struct modem_cmd_handler *handler,
const struct setup_cmd *cmds, size_t cmds_len,
struct k_sem *sem, k_timeout_t timeout);
/**
* @brief send a series of AT commands w/o locking TX
*
* @param *iface: interface to use
* @param *handler: command handler to use
* @param *cmds: array of setup commands to send
* @param cmds_len: size of the setup command array
* @param *sem: wait for response semaphore
* @param timeout: timeout of command
*
* @retval 0 if ok, < 0 if error.
*/
int modem_cmd_handler_setup_cmds_nolock(struct modem_iface *iface,
struct modem_cmd_handler *handler,
const struct setup_cmd *cmds,
size_t cmds_len, struct k_sem *sem,
k_timeout_t timeout);
/**
* @brief Init command handler
*
* @param *handler: command handler to initialize
* @param *data: command handler data to use
*
* @retval 0 if ok, < 0 if error.
*/
int modem_cmd_handler_init(struct modem_cmd_handler *handler,
struct modem_cmd_handler_data *data);
/**
* @brief Lock the modem for sending cmds
*
* This is semaphore-based rather than mutex based, which means there's no
* requirements of thread ownership for the user. These functions are useful
* when one needs to prevent threads from sending UART data to the modem for an
* extended period of time (for example during modem reset).
*
* @param *handler: command handler to lock
* @param lock: set true to lock, false to unlock
* @param timeout: give up after timeout
*
* @retval 0 if ok, < 0 if error.
*/
int modem_cmd_handler_tx_lock(struct modem_cmd_handler *handler,
k_timeout_t timeout);
void modem_cmd_handler_tx_unlock(struct modem_cmd_handler *handler);
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_INCLUDE_DRIVERS_MODEM_MODEM_CMD_HANDLER_H_ */