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author | Stefan Roese <sr@denx.de> | 2007-12-11 11:34:54 +0100 |
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committer | Stefan Roese <sr@denx.de> | 2007-12-11 11:34:54 +0100 |
commit | 9caeaadf508cd0e11ac5dfc56ab0f72e3b89a105 (patch) | |
tree | 1afcc9c20c04e19870ab5e2996104877695c54a3 /drivers/misc/status_led.c | |
parent | 7cfc12a7dcfdb350e2ab76db4dafcc30f7e77c2b (diff) | |
parent | 41be969f4957115ed7b1fe8b890bfaee99d7a7a2 (diff) | |
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Merge commit 'u-boot/master' into for-1.3.1
Conflicts:
drivers/rtc/Makefile
Diffstat (limited to 'drivers/misc/status_led.c')
-rw-r--r-- | drivers/misc/status_led.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/misc/status_led.c b/drivers/misc/status_led.c new file mode 100644 index 0000000..ddb6c22 --- /dev/null +++ b/drivers/misc/status_led.c @@ -0,0 +1,131 @@ +/* + * (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 */ |