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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by Mark Arigo
*
* 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 "cpu.h"
#include "lcd.h"
#include "kernel.h"
#include "system.h"
/* register defines for Philips LCD 220x176x16 - model: LPH9165-2 */
#define LCD_REG_UNKNOWN_00 0x00
#define LCD_REG_UNKNOWN_01 0x01
#define LCD_REG_UNKNOWN_05 0x05
#define LCD_REG_WRITE_DATA_2_GRAM 0x06
#define LCD_REG_HORIZ_ADDR_START 0x08
#define LCD_REG_HORIZ_ADDR_END 0x09
#define LCD_REG_VERT_ADDR_START 0x0a
#define LCD_REG_VERT_ADDR_END 0x0b
/* whether the lcd is currently enabled or not */
static bool lcd_enabled;
/* Value used for flipping. Must be remembered when display is turned off. */
static unsigned short flip;
/* Used for flip offset correction */
static int x_offset;
/* Inverse value. Must be remembered when display is turned off. */
static unsigned short invert;
/* wait for LCD */
static inline void lcd_wait_write(void)
{
while (LCD2_PORT & LCD2_BUSY_MASK);
}
/* send LCD data */
static void lcd_send_data(unsigned data)
{
lcd_wait_write();
LCD2_PORT = LCD2_DATA_MASK | (data & 0xff);
}
/* send LCD command */
static void lcd_send_reg(unsigned reg)
{
lcd_wait_write();
LCD2_PORT = LCD2_CMD_MASK | (reg & 0xff);
lcd_wait_write();
}
void lcd_init_device(void)
{
x_offset = 16;
invert = 0x00;
flip = 0x40;
lcd_enabled = true;
}
#ifdef HAVE_LCD_ENABLE
/* enable / disable lcd */
void lcd_enable(bool on)
{
if (on == lcd_enabled)
return;
if (on) /* lcd_display_on() */
{
lcd_send_reg(LCD_REG_UNKNOWN_00);
lcd_send_data(0x00 | invert);
lcd_send_reg(LCD_REG_UNKNOWN_01);
lcd_send_data(0x08 | flip);
lcd_send_reg(LCD_REG_UNKNOWN_05);
lcd_send_data(0x0f);
sleep(HZ/10); /* 100ms */
/* Probably out of sync and we don't wanna pepper the code with
lcd_update() calls for this. */
lcd_update();
send_event(LCD_EVENT_ACTIVATION, NULL);
lcd_enabled = true;
}
else /* lcd_display_off() */
{
lcd_send_reg(LCD_REG_UNKNOWN_00);
lcd_send_data(0x08);
lcd_enabled = false;
}
}
bool lcd_active(void)
{
return lcd_enabled;
}
#endif /* HAVE_LCD_ENABLE */
/*** hardware configuration ***/
int lcd_default_contrast(void)
{
return DEFAULT_CONTRAST_SETTING;
}
void lcd_set_contrast(int val)
{
(void)val;
}
void lcd_set_invert_display(bool yesno)
{
invert = (yesno) ? 0x40 : 0x00;
lcd_send_reg(LCD_REG_UNKNOWN_00);
lcd_send_data(invert);
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
flip = (yesno) ? 0x80 : 0x40;
x_offset = (yesno) ? 4 : 16;
lcd_send_reg(LCD_REG_UNKNOWN_01);
lcd_send_data(0x08 | flip);
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
/* Update a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
unsigned long *addr;
int new_x, new_width;
/* Ensure x and width are both even - so we can read 32-bit aligned
data from lcd_framebuffer */
new_x = x&~1;
new_width = width&~1;
if (new_x+new_width < x+width) new_width += 2;
x = new_x;
width = new_width;
if (x + width >= LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height >= LCD_HEIGHT)
height = LCD_HEIGHT - y;
if ((width <= 0) || (height <= 0))
return; /* Nothing left to do. */
lcd_send_reg(LCD_REG_HORIZ_ADDR_START);
lcd_send_data(y);
lcd_send_reg(LCD_REG_HORIZ_ADDR_END);
lcd_send_data(y + height - 1);
lcd_send_reg(LCD_REG_VERT_ADDR_START);
lcd_send_data(x + x_offset);
lcd_send_reg(LCD_REG_VERT_ADDR_END);
lcd_send_data(x + width - 1 + x_offset);
lcd_send_reg(LCD_REG_WRITE_DATA_2_GRAM);
addr = (unsigned long*)FBADDR(x,y);
while (height > 0)
{
int c, r;
int h, pixels_to_write;
pixels_to_write = (width * height) * 2;
h = height;
/* calculate how much we can do in one go */
if (pixels_to_write > 0x10000)
{
h = (0x10000/2) / width;
pixels_to_write = (width * h) * 2;
}
LCD2_BLOCK_CTRL = 0x10000080;
LCD2_BLOCK_CONFIG = 0xc0010000 | (pixels_to_write - 1);
LCD2_BLOCK_CTRL = 0x34000000;
/* for each row */
for (r = 0; r < h; r++)
{
/* for each column */
for (c = 0; c < width; c += 2)
{
while (!(LCD2_BLOCK_CTRL & LCD2_BLOCK_TXOK));
/* output 2 pixels */
LCD2_BLOCK_DATA = *addr++;
}
addr += (LCD_WIDTH - width)/2;
}
while (!(LCD2_BLOCK_CTRL & LCD2_BLOCK_READY));
LCD2_BLOCK_CONFIG = 0;
height -= h;
}
}
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