mirror of
https://github.com/AsahiLinux/u-boot
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160 lines
3.6 KiB
C
160 lines
3.6 KiB
C
/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <status_led.h>
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/*
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* The purpose of this code is to signal the operational status of a
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* target which usually boots over the network; while running in
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* PCBoot, a status LED is blinking. As soon as a valid BOOTP reply
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* message has been received, the LED is turned off. The Linux
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* kernel, once it is running, will start blinking the LED again,
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* with another frequency.
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*/
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/* ------------------------------------------------------------------------- */
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#ifdef CONFIG_STATUS_LED
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typedef struct {
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ulong mask;
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int state;
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int period;
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int cnt;
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} led_dev_t;
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led_dev_t led_dev[] = {
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{ STATUS_LED_BIT,
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STATUS_LED_STATE,
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STATUS_LED_PERIOD,
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0,
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},
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#if defined(STATUS_LED_BIT1)
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{ STATUS_LED_BIT1,
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STATUS_LED_STATE1,
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STATUS_LED_PERIOD1,
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0,
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},
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#endif
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#if defined(STATUS_LED_BIT2)
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{ STATUS_LED_BIT2,
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STATUS_LED_STATE2,
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STATUS_LED_PERIOD2,
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0,
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},
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#endif
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};
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#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
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static int status_led_init_done = 0;
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static void status_led_init (void)
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{
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volatile immap_t *immr = (immap_t *)CFG_IMMR;
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int i;
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for (i=0; i<MAX_LED_DEV; ++i) {
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led_dev_t *ld = &led_dev[i];
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immr->STATUS_LED_PAR &= ~(ld->mask);
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#ifdef STATUS_LED_ODR
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immr->STATUS_LED_ODR &= ~(ld->mask);
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#endif
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#if (STATUS_LED_ACTIVE == 0)
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if (ld->state == STATUS_LED_ON)
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immr->STATUS_LED_DAT &= ~(ld->mask);
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else
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immr->STATUS_LED_DAT |= ld->mask ;
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#else
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if (ld->state == STATUS_LED_ON)
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immr->STATUS_LED_DAT |= ld->mask ;
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else
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immr->STATUS_LED_DAT &= ~(ld->mask);
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#endif
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immr->STATUS_LED_DIR |= ld->mask ;
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}
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status_led_init_done = 1;
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}
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void status_led_tick (ulong timestamp)
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{
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volatile immap_t *immr = (immap_t *)CFG_IMMR;
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int i;
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if (!status_led_init_done)
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status_led_init();
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for (i=0; i<MAX_LED_DEV; ++i) {
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led_dev_t *ld = &led_dev[i];
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if (ld->state != STATUS_LED_BLINKING)
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continue;
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if (++(ld->cnt) >= ld->period) {
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immr->STATUS_LED_DAT ^= ld->mask;
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ld->cnt -= ld->period;
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}
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}
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}
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void status_led_set (int led, int state)
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{
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volatile immap_t *immr = (immap_t *)CFG_IMMR;
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led_dev_t *ld;
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if (led < 0 || led >= MAX_LED_DEV)
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return;
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if (!status_led_init_done)
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status_led_init();
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ld = &led_dev[led];
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switch (state) {
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default:
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return;
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case STATUS_LED_BLINKING:
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ld->cnt = 0; /* always start with full period */
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/* fall through */ /* always start with LED _ON_ */
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case STATUS_LED_ON:
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#if (STATUS_LED_ACTIVE == 0)
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immr->STATUS_LED_DAT &= ~(ld->mask);
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#else
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immr->STATUS_LED_DAT |= ld->mask ;
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#endif
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break;
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case STATUS_LED_OFF:
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#if (STATUS_LED_ACTIVE == 0)
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immr->STATUS_LED_DAT |= ld->mask ;
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#else
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immr->STATUS_LED_DAT &= ~(ld->mask);
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#endif
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break;
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}
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ld->state = state;
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}
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#endif /* CONFIG_STATUS_LED */
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