[u-boot.git] / cpu / mpc8xx / status_led.c

/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * 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 <mpc8xx.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
 * PCBoot, 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 {
	ulong	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)
{
    volatile immap_t *immr = (immap_t *)CFG_IMMR;
    int i;

    for (i=0; i<MAX_LED_DEV; ++i) {
	led_dev_t *ld = &led_dev[i];

	immr->STATUS_LED_PAR &= ~(ld->mask);
#ifdef STATUS_LED_ODR
	immr->STATUS_LED_ODR &= ~(ld->mask);
#endif
#if (STATUS_LED_ACTIVE == 0)
	if (ld->state == STATUS_LED_ON)
		immr->STATUS_LED_DAT &= ~(ld->mask);
	else
		immr->STATUS_LED_DAT |=   ld->mask ;
#else
	if (ld->state == STATUS_LED_ON)
		immr->STATUS_LED_DAT |=   ld->mask ;
	else
		immr->STATUS_LED_DAT &= ~(ld->mask);
#endif
	immr->STATUS_LED_DIR |=   ld->mask ;
    }

    status_led_init_done  = 1;
}

void status_led_tick (ulong timestamp)
{
    volatile immap_t *immr = (immap_t *)CFG_IMMR;
    int i;

    if (!status_led_init_done)
	status_led_init();

    for (i=0; i<MAX_LED_DEV; ++i) {
	led_dev_t *ld = &led_dev[i];

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

	if (++(ld->cnt) >= ld->period) {
		immr->STATUS_LED_DAT ^= ld->mask;
		ld->cnt -= ld->period;
	}
    }
}

void status_led_set (int led, int state)
{
    volatile immap_t *immr = (immap_t *)CFG_IMMR;
    led_dev_t *ld;

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

    if (!status_led_init_done)
	status_led_init();

    ld = &led_dev[led];

    switch (state) {
    default:
	return;
    case STATUS_LED_BLINKING:
	ld->cnt = 0;		/* always start with full period	*/
	/* fall through */	/* always start with LED _ON_		*/
    case STATUS_LED_ON:
#if (STATUS_LED_ACTIVE == 0)
	immr->STATUS_LED_DAT &= ~(ld->mask);
#else
	immr->STATUS_LED_DAT |=   ld->mask ;
#endif
	break;
    case STATUS_LED_OFF:
#if (STATUS_LED_ACTIVE == 0)
	immr->STATUS_LED_DAT |=   ld->mask ;
#else
	immr->STATUS_LED_DAT &= ~(ld->mask);
#endif
	break;
    }
    ld->state = state;
}

#endif	/* CONFIG_STATUS_LED */
Commit	Line	Data
6a30c4ca WD	1	/*
	2	* (C) Copyright 2000
	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
	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>
	25	#include <mpc8xx.h>
	26	#include <status_led.h>
	27
	28	/*
	29	* The purpose of this code is to signal the operational status of a
	30	* target which usually boots over the network; while running in
	31	* PCBoot, a status LED is blinking. As soon as a valid BOOTP reply
	32	* message has been received, the LED is turned off. The Linux
	33	* kernel, once it is running, will start blinking the LED again,
	34	* with another frequency.
	35	*/
	36
	37	/* ------------------------------------------------------------------------- */
	38
	39	#ifdef CONFIG_STATUS_LED
	40
	41	typedef struct {
	42	ulong mask;
	43	int state;
	44	int period;
	45	int cnt;
	46	} led_dev_t;
	47
	48	led_dev_t led_dev[] = {
	49	{ STATUS_LED_BIT,
	50	STATUS_LED_STATE,
	51	STATUS_LED_PERIOD,
	52	0,
	53	},
	54	#if defined(STATUS_LED_BIT1)
	55	{ STATUS_LED_BIT1,
	56	STATUS_LED_STATE1,
	57	STATUS_LED_PERIOD1,
	58	0,
	59	},
	60	#endif
	61	#if defined(STATUS_LED_BIT2)
	62	{ STATUS_LED_BIT2,
	63	STATUS_LED_STATE2,
	64	STATUS_LED_PERIOD2,
65	0,
66	},
67	#endif
68	#if defined(STATUS_LED_BIT3)
69	{ STATUS_LED_BIT3,
70	STATUS_LED_STATE3,
71	STATUS_LED_PERIOD3,
72	0,
73	},
74	#endif
75	};
76
77	#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
78
79	static int status_led_init_done = 0;
80
81	static void status_led_init (void)
82	{
83	volatile immap_t immr = (immap_t )CFG_IMMR;
84	int i;
85
86	for (i=0; i<MAX_LED_DEV; ++i) {
87	led_dev_t *ld = &led_dev[i];
88
89	immr->STATUS_LED_PAR &= ~(ld->mask);
90	#ifdef STATUS_LED_ODR
91	immr->STATUS_LED_ODR &= ~(ld->mask);
92	#endif
93	#if (STATUS_LED_ACTIVE == 0)
94	if (ld->state == STATUS_LED_ON)
95	immr->STATUS_LED_DAT &= ~(ld->mask);
96	else
97	immr->STATUS_LED_DAT \|= ld->mask ;
98	#else
99	if (ld->state == STATUS_LED_ON)
100	immr->STATUS_LED_DAT \|= ld->mask ;
101	else
102	immr->STATUS_LED_DAT &= ~(ld->mask);
103	#endif
104	immr->STATUS_LED_DIR \|= ld->mask ;
105	}
106
107	status_led_init_done = 1;
108	}
109
110	void status_led_tick (ulong timestamp)
111	{
112	volatile immap_t immr = (immap_t )CFG_IMMR;
113	int i;
114
115	if (!status_led_init_done)
116	status_led_init();
117
118	for (i=0; i<MAX_LED_DEV; ++i) {
119	led_dev_t *ld = &led_dev[i];
120
121	if (ld->state != STATUS_LED_BLINKING)
122	continue;
123
124	if (++(ld->cnt) >= ld->period) {
125	immr->STATUS_LED_DAT ^= ld->mask;
126	ld->cnt -= ld->period;
127	}
128	}
129	}
130
131	void status_led_set (int led, int state)
132	{
133	volatile immap_t immr = (immap_t )CFG_IMMR;
134	led_dev_t *ld;
135
136	if (led < 0 \|\| led >= MAX_LED_DEV)
137	return;
138
139	if (!status_led_init_done)
140	status_led_init();
141
142	ld = &led_dev[led];
143
144	switch (state) {
145	default:
146	return;
147	case STATUS_LED_BLINKING:
148	ld->cnt = 0; /* always start with full period */
149	/* fall through / / always start with LED _ON_ */
150	case STATUS_LED_ON:
151	#if (STATUS_LED_ACTIVE == 0)
152	immr->STATUS_LED_DAT &= ~(ld->mask);
153	#else
154	immr->STATUS_LED_DAT \|= ld->mask ;
155	#endif
156	break;
157	case STATUS_LED_OFF:
158	#if (STATUS_LED_ACTIVE == 0)
159	immr->STATUS_LED_DAT \|= ld->mask ;
160	#else
161	immr->STATUS_LED_DAT &= ~(ld->mask);
162	#endif
163	break;
164	}
165	ld->state = state;
166	}
167
168	#endif /* CONFIG_STATUS_LED */