[people/ms/u-boot.git] / drivers / status_led.c

/*
 * (C) Copyright 2000-2003
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#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.
 */

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

#ifdef CONFIG_STATUS_LED

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
};

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

static int status_led_init_done = 0;

static 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);
}

#endif	/* CONFIG_STATUS_LED */
Commit	Line	Data
6a30c4ca	1	/*
48b42616	2	* (C) Copyright 2000-2003
6a30c4ca WD	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
6a30c4ca WD	25	#include <status_led.h>
	26
	27	/*
	28	* The purpose of this code is to signal the operational status of a
	29	* target which usually boots over the network; while running in
48b42616	30	* U-Boot, a status LED is blinking. As soon as a valid BOOTP reply
6a30c4ca WD	31	* message has been received, the LED is turned off. The Linux
	32	* kernel, once it is running, will start blinking the LED again,
	33	* with another frequency.
	34	*/
	35
	36	/* ------------------------------------------------------------------------- */
	37
	38	#ifdef CONFIG_STATUS_LED
	39
	40	typedef struct {
48b42616 WD	41	led_id_t mask;
	42	int state;
	43	int period;
	44	int cnt;
6a30c4ca WD	45	} led_dev_t;
	46
	47	led_dev_t led_dev[] = {
	48	{ STATUS_LED_BIT,
	49	STATUS_LED_STATE,
	50	STATUS_LED_PERIOD,
	51	0,
	52	},
	53	#if defined(STATUS_LED_BIT1)
	54	{ STATUS_LED_BIT1,
	55	STATUS_LED_STATE1,
	56	STATUS_LED_PERIOD1,
	57	0,
	58	},
	59	#endif
	60	#if defined(STATUS_LED_BIT2)
	61	{ STATUS_LED_BIT2,
	62	STATUS_LED_STATE2,
	63	STATUS_LED_PERIOD2,
	64	0,
	65	},
	66	#endif
	67	#if defined(STATUS_LED_BIT3)
	68	{ STATUS_LED_BIT3,
	69	STATUS_LED_STATE3,
	70	STATUS_LED_PERIOD3,
	71	0,
	72	},
	73	#endif
	74	};
	75
	76	#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
	77
	78	static int status_led_init_done = 0;
	79
	80	static void status_led_init (void)
	81	{
48b42616 WD	82	led_dev_t *ld;
48b42616 WD	83	int i;
6a30c4ca	84
48b42616 WD	85	for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++)
	86	__led_init (ld->mask, ld->state);
	87	status_led_init_done = 1;
6a30c4ca WD	88	}
	89
	90	void status_led_tick (ulong timestamp)
	91	{
48b42616 WD	92	led_dev_t *ld;
	93	int i;
	94
	95	if (!status_led_init_done)
	96	status_led_init ();
6a30c4ca	97
48b42616	98	for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) {
6a30c4ca	99
48b42616 WD	100	if (ld->state != STATUS_LED_BLINKING)
48b42616 WD	101	continue;
6a30c4ca	102
48b42616 WD	103	if (++ld->cnt >= ld->period) {
	104	__led_toggle (ld->mask);
	105	ld->cnt -= ld->period;
	106	}
6a30c4ca	107
6a30c4ca	108	}
6a30c4ca WD	109	}
	110
	111	void status_led_set (int led, int state)
	112	{
48b42616 WD	113	led_dev_t *ld;
	114
	115	if (led < 0 \|\| led >= MAX_LED_DEV)
	116	return;
	117
	118	if (!status_led_init_done)
	119	status_led_init ();
	120
	121	ld = &led_dev[led];
	122
	123	ld->state = state;
	124	if (state == STATUS_LED_BLINKING) {
	125	ld->cnt = 0; /* always start with full period */
	126	state = STATUS_LED_ON; /* always start with LED _ON_ */
	127	}
	128	__led_set (ld->mask, state);
6a30c4ca WD	129	}
	130
	131	#endif /* CONFIG_STATUS_LED */