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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "jz4740.h"
#include "lcd.h"
#include "lcd-target.h"
#include "system-target.h"
#include "kernel.h"
static volatile bool _lcd_on = false;
static volatile bool lcd_poweroff = false;
/* LCD init */
void lcd_init_device(void)
{
lcd_init_controller();
_lcd_on = true;
}
void lcd_enable(bool state)
{
if(state)
{
lcd_on();
lcd_call_enable_hook();
}
else
lcd_off();
_lcd_on = state;
}
bool lcd_enabled(void)
{
return _lcd_on;
}
/* Update a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
lcd_set_target(x, y, width, height);
REG_DMAC_DCCSR(0) = 0;
REG_DMAC_DRSR(0) = DMAC_DRSR_RS_SLCD; /* source = SLCD */
REG_DMAC_DSAR(0) = ((unsigned int)&lcd_framebuffer[y][x]) & 0x1FFFFFFF;
REG_DMAC_DTAR(0) = 0x130500B0; /* SLCD_FIFO */
REG_DMAC_DTCR(0) = width*height;
REG_DMAC_DCMD(0) = (DMAC_DCMD_SAI | DMAC_DCMD_RDIL_IGN | DMAC_DCMD_SWDH_32 /* (1 << 23) | (0 << 16) | (0 << 14) */
| DMAC_DCMD_DWDH_16 | DMAC_DCMD_DS_16BIT); /* | (2 << 12) | (3 << 8) */
REG_DMAC_DCCSR(0) = (DMAC_DCCSR_NDES | DMAC_DCCSR_EN); /* (1 << 31) | (1 << 0) */
__dcache_writeback_all(); /* Size of framebuffer is way bigger than cache size */
while(REG_SLCD_STATE & SLCD_STATE_BUSY);
REG_SLCD_CTRL = SLCD_CTRL_DMA_EN;
REG_DMAC_DMACR = DMAC_DMACR_DMAE;
while( !(REG_DMAC_DCCSR(0) & DMAC_DCCSR_TT) )
yield();
REG_DMAC_DMACR = 0;
while(REG_SLCD_STATE & SLCD_STATE_BUSY);
REG_SLCD_CTRL = 0;
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
if (!_lcd_on)
return;
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
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