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/*
* ser2net - A program for allowing telnet connection to serial ports
* Copyright (C) 2016-2020 Corey Minyard <minyard@acm.org>
* Copyright (C) 2016 Michael Heimpold <mhei@heimpold.de>
*
* SPDX-License-Identifier: GPL-2.0-only
*
* In addition, as a special exception, the copyright holders of
* ser2net give you permission to combine ser2net with free software
* programs or libraries that are released under the GNU LGPL and
* with code included in the standard release of OpenSSL under the
* OpenSSL license (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for ser2net and the licenses of the other code
* concerned, provided that you include the source code of that
* other code when and as the GNU GPL requires distribution of source
* code.
*
* Note that people who make modified versions of ser2net are not
* obligated to grant this special exception for their modified
* versions; it is their choice whether to do so. The GNU General
* Public License gives permission to release a modified version
* without this exception; this exception also makes it possible to
* release a modified version which carries forward this exception.
*/
#ifndef LED_H
#define LED_H
#include "absout.h"
struct led_driver_s;
struct led_s
{
struct led_s *next;
char *name;
unsigned int refcount;
struct led_driver_s *driver;
void *drv_data;
};
struct led_driver_s {
struct led_driver_s *next;
const char *name;
/* required: parse the parameters from config file */
int (*init)(struct led_s *led, const char * const *options, int lineno,
struct absout *eout);
/* optional, but required when drv_data is malloced in init */
int (*free)(struct led_s *led);
/* optional: called once during initialization, prepares the LED */
int (*configure)(void *drv_data, int lineno, struct absout *eout);
/* required: called when data transfer should be signaled */
int (*flash)(void *drv_data);
/* required: turn led on or off */
int (*enable)(void *drv_data, int value);
/* optional: called during deinitialization, could switch the LED off */
int (*deconfigure)(void *drv_data);
};
/* Initializes and registers all LED drivers */
int led_driver_init(void);
/* Callback to register a given LED driver in the system */
int led_driver_register(struct led_driver_s *led_driver);
/* Handle an LED config line */
int add_led(const char *name, const char *driverstr,
const char * const *options, int lineno, struct absout *eout);
/* Search for a LED by name. This will increment the refcount. */
struct led_s *find_led(const char *name);
/* Decrement the LED's refcount and free if it reaches 0. */
void free_led(struct led_s *led);
/* Free all registered LEDs in the system */
void free_leds(void);
/* Turn LED on / off */
int led_enable(struct led_s *led, int value);
/* Flash the given LED */
int led_flash(struct led_s *led);
#endif /* LED_H */
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