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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include <stdlib.h>
#include "sh7034.h"
#include "kernel.h"
#include "thread.h"
#include "i2c.h"
#include "debug.h"
#include "rtc.h"
#include "usb.h"
#define BACKLIGHT_ON 1
#define BACKLIGHT_OFF 2
static void backlight_thread(void);
static char backlight_stack[DEFAULT_STACK_SIZE];
static char backlight_thread_name[] = "backlight";
static struct event_queue backlight_queue;
static int backlight_timer;
static int backlight_timeout = 5;
static char timeout_value[19] =
{
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 45, 60, 90
};
void backlight_thread(void)
{
struct event ev;
while(1)
{
queue_wait(&backlight_queue, &ev);
switch(ev.id)
{
case BACKLIGHT_ON:
backlight_timer = HZ*timeout_value[backlight_timeout];
if(backlight_timer < 0)
{
#ifdef HAVE_RTC
/* Disable square wave */
rtc_write(0x0a, rtc_read(0x0a) & ~0x40);
#else
PADR |= 0x4000;
#endif
}
else if(backlight_timer)
{
#ifdef HAVE_RTC
/* Enable square wave */
rtc_write(0x0a, rtc_read(0x0a) | 0x40);
#else
PADR &= ~0x4000;
#endif
}
break;
case BACKLIGHT_OFF:
#ifdef HAVE_RTC
/* Disable square wave */
rtc_write(0x0a, rtc_read(0x0a) & ~0x40);
#else
PADR |= 0x4000;
#endif
break;
case SYS_USB_CONNECTED:
/* Tell the USB thread that we are safe */
DEBUGF("backlight_thread got SYS_USB_CONNECTED\n");
usb_acknowledge(SYS_USB_CONNECTED_ACK);
break;
case SYS_USB_DISCONNECTED:
usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
break;
}
}
}
void backlight_on(void)
{
queue_post(&backlight_queue, BACKLIGHT_ON, NULL);
}
void backlight_off(void)
{
queue_post(&backlight_queue, BACKLIGHT_OFF, NULL);
}
void backlight_time(int value)
{
backlight_timeout = value;
backlight_on();
}
void backlight_tick(void)
{
if(backlight_timer)
{
backlight_timer--;
if(backlight_timer == 0)
{
backlight_off();
}
}
}
void backlight_init(void)
{
queue_init(&backlight_queue);
create_thread(backlight_thread, backlight_stack,
sizeof(backlight_stack), backlight_thread_name);
PAIOR |= 0x4000;
backlight_on();
}
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