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Diffstat (limited to 'cpu/mpc5xx/status_led.c')
| -rw-r--r-- | cpu/mpc5xx/status_led.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/cpu/mpc5xx/status_led.c b/cpu/mpc5xx/status_led.c new file mode 100644 index 0000000..f15bbe8 --- /dev/null +++ b/cpu/mpc5xx/status_led.c @@ -0,0 +1,161 @@ +/* + * (C) Copyright 2000-2002 Wolfgang Denk, DENX Software Engineering, wd@denx.de + * (C) Copyright 2003 Martin Winistoerfer, martinwinistoerfer@gmx.ch. + * + * 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 + */ + +/* + * File: status_led.c + * + * Discription: Blink a board led to show boot progress. Led's + * are connected via the MIOS module. + */ + +#include <common.h> +#include <mpc5xx.h> +#include <status_led.h> + +#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_DIR = STATUS_LED_BIT; + +#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 + } + + 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 */ |