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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 François Dinel
* Copyright (C) 2008-2009 Rafaël Carré
*
* 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 "lcd.h"
#include "lcd-clip.h"
#include "system.h"
#include "cpu.h"
int lcd_hw_init(void)
{
bitset32(&CGU_PERI, CGU_SSP_CLOCK_ENABLE);
SSP_CPSR = AS3525_SSP_PRESCALER; /* OF = 0x10 */
SSP_CR0 = (1<<7) | (1<<6) | 7; /* Motorola SPI frame format, 8 bits */
SSP_CR1 = (1<<3) | (1<<1); /* SSP Operation enabled */
SSP_IMSC = 0; /* No interrupts */
/* configure GPIO B2 (display D/C#) as output */
GPIOB_DIR |= (1<<2);
/* configure GPIO B3 (display type detect) as input */
GPIOB_DIR &= ~(1<<3);
/* reset display using GPIO A5 (display RESET#) */
GPIOA_DIR |= (1<<5);
GPIOA_PIN(5) = 0;
udelay(1000);
GPIOA_PIN(5) = (1<<5);
/* detect display type on GPIO B3 */
return GPIOB_PIN(3) ? 1 : 0;
}
void lcd_write_command(int byte)
{
while(SSP_SR & (1<<4)) /* BSY flag */
;
/* LCD command mode */
GPIOB_PIN(2) = 0;
SSP_DATA = byte;
while(SSP_SR & (1<<4)) /* BSY flag */
;
}
void lcd_write_cmd_triplet(int cmd1, int cmd2, int cmd3)
{
#ifndef LCD_USE_FIFO_FOR_COMMANDS
lcd_write_command(cmd1);
lcd_write_command(cmd2);
lcd_write_command(cmd3);
#else
/* combine writes to data register */
while(SSP_SR & (1<<4)) /* BSY flag */
;
/* FIFO is empty at this point */
/* LCD command mode */
GPIOB_PIN(2) = 0;
/* !!makes assumption FIFO is at least (3) levels deep!! */
SSP_DATA = cmd1;
SSP_DATA = cmd2;
SSP_DATA = cmd3;
while(SSP_SR & (1<<4)) /* BSY flag */
;
#endif
}
void lcd_write_data(const fb_data* p_bytes, int count)
{
/* LCD data mode */
GPIOB_PIN(2) = (1<<2);
while (count--)
{
while(!(SSP_SR & (1<<1))) /* wait until transmit FIFO is not full */
;
SSP_DATA = *p_bytes++;
}
}
void lcd_enable_power(bool onoff)
{
#ifndef BOOTLOADER
if (onoff)
bitset32(&CGU_PERI, CGU_SSP_CLOCK_ENABLE);
else
bitclr32(&CGU_PERI, CGU_SSP_CLOCK_ENABLE);
#else
(void) onoff;
#endif
}
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