[J-u-boot.git] / drivers / misc / status_led.c

/*
 * (C) Copyright 2000-2003
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <status_led.h>

/*
 * The purpose of this code is to signal the operational status of a
 * target which usually boots over the network; while running in
 * U-Boot, a status LED is blinking. As soon as a valid BOOTP reply
 * message has been received, the LED is turned off. The Linux
 * kernel, once it is running, will start blinking the LED again,
 * with another frequency.
 */

/* ------------------------------------------------------------------------- */

typedef struct {
	led_id_t mask;
	int state;
	int period;
	int cnt;
} led_dev_t;

led_dev_t led_dev[] = {
    {	STATUS_LED_BIT,
	STATUS_LED_STATE,
	STATUS_LED_PERIOD,
	0,
    },
#if defined(STATUS_LED_BIT1)
    {	STATUS_LED_BIT1,
	STATUS_LED_STATE1,
	STATUS_LED_PERIOD1,
	0,
    },
#endif
#if defined(STATUS_LED_BIT2)
    {	STATUS_LED_BIT2,
	STATUS_LED_STATE2,
	STATUS_LED_PERIOD2,
	0,
    },
#endif
#if defined(STATUS_LED_BIT3)
    {	STATUS_LED_BIT3,
	STATUS_LED_STATE3,
	STATUS_LED_PERIOD3,
	0,
    },
#endif
#if defined(STATUS_LED_BIT4)
    {	STATUS_LED_BIT4,
	STATUS_LED_STATE4,
	STATUS_LED_PERIOD4,
	0,
    },
#endif
#if defined(STATUS_LED_BIT5)
    {	STATUS_LED_BIT5,
	STATUS_LED_STATE5,
	STATUS_LED_PERIOD5,
	0,
    },
#endif
};

#define MAX_LED_DEV	(sizeof(led_dev)/sizeof(led_dev_t))

static int status_led_init_done = 0;

void status_led_init(void)
{
	led_dev_t *ld;
	int i;

	for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++)
		__led_init (ld->mask, ld->state);
	status_led_init_done = 1;
}

void status_led_tick (ulong timestamp)
{
	led_dev_t *ld;
	int i;

	if (!status_led_init_done)
		status_led_init ();

	for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) {

		if (ld->state != STATUS_LED_BLINKING)
			continue;

		if (++ld->cnt >= ld->period) {
			__led_toggle (ld->mask);
			ld->cnt -= ld->period;
		}

	}
}

void status_led_set (int led, int state)
{
	led_dev_t *ld;

	if (led < 0 || led >= MAX_LED_DEV)
		return;

	if (!status_led_init_done)
		status_led_init ();

	ld = &led_dev[led];

	ld->state = state;
	if (state == STATUS_LED_BLINKING) {
		ld->cnt = 0;		/* always start with full period    */
		state = STATUS_LED_ON;	/* always start with LED _ON_       */
	}
	__led_set (ld->mask, state);
}
Commit	Line	Data
6a30c4ca	1	/*
48b42616	2	* (C) Copyright 2000-2003
6a30c4ca WD	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
6a30c4ca WD	4	*
3765b3e7	5	* SPDX-License-Identifier: GPL-2.0+
6a30c4ca WD	6	*/
	7
	8	#include <common.h>
6a30c4ca WD	9	#include <status_led.h>
	10
	11	/*
	12	* The purpose of this code is to signal the operational status of a
	13	* target which usually boots over the network; while running in
48b42616	14	* U-Boot, a status LED is blinking. As soon as a valid BOOTP reply
6a30c4ca WD	15	* message has been received, the LED is turned off. The Linux
	16	* kernel, once it is running, will start blinking the LED again,
	17	* with another frequency.
	18	*/
	19
	20	/* ------------------------------------------------------------------------- */
	21
6a30c4ca	22	typedef struct {
48b42616 WD	23	led_id_t mask;
	24	int state;
	25	int period;
	26	int cnt;
6a30c4ca WD	27	} led_dev_t;
	28
	29	led_dev_t led_dev[] = {
	30	{ STATUS_LED_BIT,
	31	STATUS_LED_STATE,
	32	STATUS_LED_PERIOD,
	33	0,
	34	},
	35	#if defined(STATUS_LED_BIT1)
	36	{ STATUS_LED_BIT1,
	37	STATUS_LED_STATE1,
	38	STATUS_LED_PERIOD1,
	39	0,
	40	},
	41	#endif
	42	#if defined(STATUS_LED_BIT2)
	43	{ STATUS_LED_BIT2,
	44	STATUS_LED_STATE2,
	45	STATUS_LED_PERIOD2,
	46	0,
	47	},
	48	#endif
	49	#if defined(STATUS_LED_BIT3)
	50	{ STATUS_LED_BIT3,
	51	STATUS_LED_STATE3,
	52	STATUS_LED_PERIOD3,
	53	0,
	54	},
	55	#endif
a8eeaf2f SR	56	#if defined(STATUS_LED_BIT4)
	57	{ STATUS_LED_BIT4,
	58	STATUS_LED_STATE4,
	59	STATUS_LED_PERIOD4,
	60	0,
	61	},
	62	#endif
	63	#if defined(STATUS_LED_BIT5)
	64	{ STATUS_LED_BIT5,
	65	STATUS_LED_STATE5,
	66	STATUS_LED_PERIOD5,
	67	0,
	68	},
	69	#endif
6a30c4ca WD	70	};
	71
	72	#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
	73
	74	static int status_led_init_done = 0;
	75
13cfbe51	76	void status_led_init(void)
6a30c4ca	77	{
48b42616 WD	78	led_dev_t *ld;
48b42616 WD	79	int i;
6a30c4ca	80
48b42616 WD	81	for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++)
	82	__led_init (ld->mask, ld->state);
	83	status_led_init_done = 1;
6a30c4ca WD	84	}
	85
	86	void status_led_tick (ulong timestamp)
	87	{
48b42616 WD	88	led_dev_t *ld;
	89	int i;
	90
	91	if (!status_led_init_done)
	92	status_led_init ();
6a30c4ca	93
48b42616	94	for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) {
6a30c4ca	95
48b42616 WD	96	if (ld->state != STATUS_LED_BLINKING)
48b42616 WD	97	continue;
6a30c4ca	98
48b42616 WD	99	if (++ld->cnt >= ld->period) {
	100	__led_toggle (ld->mask);
	101	ld->cnt -= ld->period;
	102	}
6a30c4ca	103
6a30c4ca	104	}
6a30c4ca WD	105	}
	106
	107	void status_led_set (int led, int state)
	108	{
48b42616 WD	109	led_dev_t *ld;
	110
	111	if (led < 0 \|\| led >= MAX_LED_DEV)
	112	return;
	113
	114	if (!status_led_init_done)
	115	status_led_init ();
	116
	117	ld = &led_dev[led];
	118
	119	ld->state = state;
	120	if (state == STATUS_LED_BLINKING) {
	121	ld->cnt = 0; /* always start with full period */
	122	state = STATUS_LED_ON; /* always start with LED _ON_ */
	123	}
	124	__led_set (ld->mask, state);
6a30c4ca	125	}