c3674ef96a
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1453 a1c6a512-1295-4272-9138-f99709370657
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Linus Nielsen Feltzing
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include <stdlib.h>
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#include "sh7034.h"
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#include "kernel.h"
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#include "thread.h"
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#include "i2c.h"
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#include "debug.h"
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#include "rtc.h"
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#include "usb.h"
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#define BACKLIGHT_ON 1
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#define BACKLIGHT_OFF 2
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static void backlight_thread(void);
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static char backlight_stack[DEFAULT_STACK_SIZE];
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static char backlight_thread_name[] = "backlight";
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static struct event_queue backlight_queue;
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static int backlight_timer;
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static int backlight_timeout = 5;
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void backlight_thread(void)
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{
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struct event ev;
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while(1)
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{
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queue_wait(&backlight_queue, &ev);
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switch(ev.id)
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{
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case BACKLIGHT_ON:
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backlight_timer = HZ*backlight_timeout;
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if(backlight_timer)
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{
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#ifdef HAVE_RTC
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/* Enable square wave */
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rtc_write(0x0a, rtc_read(0x0a) | 0x40);
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#else
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PADR &= ~0x4000;
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#endif
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}
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break;
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case BACKLIGHT_OFF:
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#ifdef HAVE_RTC
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/* Disable square wave */
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rtc_write(0x0a, rtc_read(0x0a) & ~0x40);
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#else
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PADR |= 0x4000;
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#endif
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break;
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case SYS_USB_CONNECTED:
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/* Tell the USB thread that we are safe */
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DEBUGF("backlight_thread got SYS_USB_CONNECTED\n");
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usb_acknowledge(SYS_USB_CONNECTED_ACK);
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/* Wait until the USB cable is extracted again */
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usb_wait_for_disconnect(&backlight_queue);
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break;
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}
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}
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}
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void backlight_on(void)
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{
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queue_post(&backlight_queue, BACKLIGHT_ON, NULL);
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}
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void backlight_off(void)
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{
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queue_post(&backlight_queue, BACKLIGHT_OFF, NULL);
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}
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void backlight_time(int seconds)
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{
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backlight_timeout = seconds;
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backlight_on();
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}
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void backlight_tick(void)
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{
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if(backlight_timer)
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{
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backlight_timer--;
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if(backlight_timer == 0)
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{
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backlight_off();
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}
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}
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}
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void backlight_init(void)
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{
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#ifdef HAVE_RTC
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rtc_write(0x13, 0x10); /* 32 kHz swuare wave */
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rtc_write(0x01, 0x00); /* Clear Stop bit */
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#endif
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queue_init(&backlight_queue);
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create_thread(backlight_thread, backlight_stack,
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sizeof(backlight_stack), backlight_thread_name);
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PAIOR |= 0x4000;
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backlight_on();
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}
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