/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:     GPL-2.0+
 */

/*
 *  Definitions for Command Processor
 */
#ifndef __COMMAND_H
#define __COMMAND_H

#include <linker_lists.h>

#ifndef NULL
#define NULL    0
#endif

/* Default to a width of 8 characters for help message command width */
#ifndef CONFIG_SYS_HELP_CMD_WIDTH
#define CONFIG_SYS_HELP_CMD_WIDTH       8
#endif

#ifndef __ASSEMBLY__
/*
 * Monitor Command Table
 */

struct cmd_tbl_s {
        char            *name;          /* Command Name                 */
        int             maxargs;        /* maximum number of arguments  */
        int             repeatable;     /* autorepeat allowed?          */
                                        /* Implementation function      */
        int             (*cmd)(struct cmd_tbl_s *, int, int, char * const []);
        char            *usage;         /* Usage message        (short) */
#ifdef  CONFIG_SYS_LONGHELP
        char            *help;          /* Help  message        (long)  */
#endif
#ifdef CONFIG_AUTO_COMPLETE
        /* do auto completion on the arguments */
        int             (*complete)(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]);
#endif
};

typedef struct cmd_tbl_s        cmd_tbl_t;


#if defined(CONFIG_CMD_RUN)
extern int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
#endif

/* common/command.c */
int _do_help (cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp, int
              flag, int argc, char * const argv[]);
cmd_tbl_t *find_cmd(const char *cmd);
cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len);

extern int cmd_usage(const cmd_tbl_t *cmdtp);

#ifdef CONFIG_AUTO_COMPLETE
extern int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[]);
extern int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp);
#endif

/**
 * cmd_process_error() - report and process a possible error
 *
 * @cmdtp: Command which caused the error
 * @err: Error code (0 if none, -ve for error, like -EIO)
 * @return 0 if there is not error, 1 (CMD_RET_FAILURE) if an error is found
 */
int cmd_process_error(cmd_tbl_t *cmdtp, int err);

/*
 * Monitor Command
 *
 * All commands use a common argument format:
 *
 * void function (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 */

#if defined(CONFIG_CMD_MEMORY) || \
        defined(CONFIG_CMD_I2C) || \
        defined(CONFIG_CMD_ITEST) || \
        defined(CONFIG_CMD_PCI)
#define CMD_DATA_SIZE
extern int cmd_get_data_size(char* arg, int default_size);
#endif

#ifdef CONFIG_CMD_BOOTD
extern int do_bootd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
#endif
#ifdef CONFIG_CMD_BOOTM
extern int do_bootm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
extern int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd);
#else
static inline int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd)
{
        return 0;
}
#endif

extern int do_bootz(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);

extern int do_booti(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);

extern int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc,
                           char *const argv[]);

extern int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
extern int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);

extern unsigned long do_go_exec(ulong (*entry)(int, char * const []), int argc,
                                char * const argv[]);
/*
 * Error codes that commands return to cmd_process(). We use the standard 0
 * and 1 for success and failure, but add one more case - failure with a
 * request to call cmd_usage(). But the cmd_process() function handles
 * CMD_RET_USAGE itself and after calling cmd_usage() it will return 1.
 * This is just a convenience for commands to avoid them having to call
 * cmd_usage() all over the place.
 */
enum command_ret_t {
        CMD_RET_SUCCESS,        /* 0 = Success */
        CMD_RET_FAILURE,        /* 1 = Failure */
        CMD_RET_USAGE = -1,     /* Failure, please report 'usage' error */
};

/**
 * Process a command with arguments. We look up the command and execute it
 * if valid. Otherwise we print a usage message.
 *
 * @param flag          Some flags normally 0 (see CMD_FLAG_.. above)
 * @param argc          Number of arguments (arg 0 must be the command text)
 * @param argv          Arguments
 * @param repeatable    This function sets this to 0 if the command is not
 *                      repeatable. If the command is repeatable, the value
 *                      is left unchanged.
 * @param ticks         If ticks is not null, this function set it to the
 *                      number of ticks the command took to complete.
 * @return 0 if the command succeeded, 1 if it failed
 */
int cmd_process(int flag, int argc, char * const argv[],
                               int *repeatable, unsigned long *ticks);

void fixup_cmdtable(cmd_tbl_t *cmdtp, int size);

/**
 * board_run_command() - Fallback function to execute a command
 *
 * When no command line features are enabled in U-Boot, this function is
 * called to execute a command. Typically the function can look at the
 * command and perform a few very specific tasks, such as booting the
 * system in a particular way.
 *
 * This function is only used when CONFIG_CMDLINE is not enabled.
 *
 * In normal situations this function should not return, since U-Boot will
 * simply hang.
 *
 * @cmdline:    Command line string to execute
 * @return 0 if OK, 1 for error
 */
int board_run_command(const char *cmdline);
#endif  /* __ASSEMBLY__ */

/*
 * Command Flags:
 */
#define CMD_FLAG_REPEAT         0x0001  /* repeat last command          */
#define CMD_FLAG_BOOTD          0x0002  /* command is from bootd        */
#define CMD_FLAG_ENV            0x0004  /* command is from the environment */

#ifdef CONFIG_AUTO_COMPLETE
# define _CMD_COMPLETE(x) x,
#else
# define _CMD_COMPLETE(x)
#endif
#ifdef CONFIG_SYS_LONGHELP
# define _CMD_HELP(x) x,
#else
# define _CMD_HELP(x)
#endif

#ifdef CONFIG_CMDLINE
#define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
                                _usage, _help, _comp)                   \
                { #_name, _maxargs, _rep, _cmd, _usage,                 \
                        _CMD_HELP(_help) _CMD_COMPLETE(_comp) }

#define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, _comp) \
        ll_entry_declare(cmd_tbl_t, _name, cmd) =                       \
                U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,  \
                                                _usage, _help, _comp);

#else
#define U_BOOT_SUBCMD_START(name)       static cmd_tbl_t name[] = {};
#define U_BOOT_SUBCMD_END

#define _CMD_REMOVE(_name, _cmd)                                        \
        int __remove_ ## _name(void)                                    \
        {                                                               \
                if (0)                                                  \
                        _cmd(NULL, 0, 0, NULL);                         \
                return 0;                                               \
        }
#define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, _usage,  \
                                  _help, _comp)                         \
                { #_name, _maxargs, _rep, 0 ? _cmd : NULL, _usage,      \
                        _CMD_HELP(_help) _CMD_COMPLETE(_comp) }

#define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, \
                            _comp)                              \
        _CMD_REMOVE(sub_ ## _name, _cmd)

#endif /* CONFIG_CMDLINE */

#define U_BOOT_CMD(_name, _maxargs, _rep, _cmd, _usage, _help)          \
        U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, NULL)

#define U_BOOT_CMD_MKENT(_name, _maxargs, _rep, _cmd, _usage, _help)    \
        U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd,          \
                                        _usage, _help, NULL)

#endif  /* __COMMAND_H */