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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by Dave Chapman
*
* 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 "hwcompat.h"
#include "kernel.h"
#include "lcd.h"
#include "system.h"
#include "cpu.h"
/* The Nano 2G has two different LCD types. What we call "type 0"
appears to be similar to the ILI9320 and "type 1" is similar to the
LDS176.
*/
/* LCD type 0 register defines */
#define R_ENTRY_MODE 0x03
#define R_HORIZ_GRAM_ADDR_SET 0x20
#define R_VERT_GRAM_ADDR_SET 0x21
#define R_WRITE_DATA_TO_GRAM 0x22
#define R_HORIZ_ADDR_START_POS 0x50
#define R_HORIZ_ADDR_END_POS 0x51
#define R_VERT_ADDR_START_POS 0x52
#define R_VERT_ADDR_END_POS 0x53
/* LCD type 1 register defines */
#define R_COLUMN_ADDR_SET 0x2a
#define R_ROW_ADDR_SET 0x2b
#define R_MEMORY_WRITE 0x2c
/** globals **/
static int lcd_type;
static int xoffset; /* needed for flip */
/** hardware access functions */
static inline void s5l_lcd_write_cmd_data(int cmd, int data)
{
LCD_WCMD = cmd >> 8;
LCD_WCMD = cmd & 0xff;
LCD_WDATA = data >> 8;
LCD_WDATA = data & 0xff;
}
static inline void s5l_lcd_write_cmd(unsigned short cmd)
{
LCD_WCMD = cmd;
}
static inline void s5l_lcd_write_data(int data)
{
LCD_WDATA = data >> 8;
LCD_WDATA = data & 0xff;
}
/*** hardware configuration ***/
int lcd_default_contrast(void)
{
return 0x1f;
}
void lcd_set_contrast(int val)
{
(void)val;
}
void lcd_set_invert_display(bool yesno)
{
(void)yesno;
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
/* TODO: flip mode isn't working. The commands in the else part of
this function are how the original firmware inits the LCD */
if (yesno)
{
xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 128 we have */
}
else
{
xoffset = 0;
}
}
void lcd_off(void)
{
}
void lcd_on(void)
{
}
/* LCD init */
void lcd_init_device(void)
{
/* Detect lcd type */
PCON13 &= ~0xf; /* Set pin 0 to input */
PCON14 &= ~0xf0; /* Set pin 1 to input */
if (((PDAT13 & 1) == 0) && ((PDAT14 & 2) == 2))
lcd_type = 0; /* Similar to ILI9320 */
else
lcd_type = 1; /* Similar to LDS176 */
/* Now init according to lcd type */
if (lcd_type == 0) {
/* TODO */
/* Entry Mode: AM=0, I/D1=1, I/D0=1, ORG=0, HWM=1, BGR=1 */
s5l_lcd_write_cmd_data(R_ENTRY_MODE, 0x1230);
} else {
/* TODO */
}
}
/*** Update functions ***/
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void) ICODE_ATTR;
void lcd_update(void)
{
int x,y;
fb_data* p = &lcd_framebuffer[0][0];
fb_data pixel;
if (lcd_type==0) {
s5l_lcd_write_cmd_data(R_HORIZ_ADDR_START_POS, 0);
s5l_lcd_write_cmd_data(R_HORIZ_ADDR_END_POS, LCD_WIDTH-1);
s5l_lcd_write_cmd_data(R_VERT_ADDR_START_POS, 0);
s5l_lcd_write_cmd_data(R_VERT_ADDR_END_POS, LCD_HEIGHT-1);
s5l_lcd_write_cmd_data(R_HORIZ_GRAM_ADDR_SET, 0);
s5l_lcd_write_cmd_data(R_VERT_GRAM_ADDR_SET, 0);
s5l_lcd_write_cmd(R_WRITE_DATA_TO_GRAM);
} else {
s5l_lcd_write_cmd(R_COLUMN_ADDR_SET);
s5l_lcd_write_data(0); /* Start column */
s5l_lcd_write_data(LCD_WIDTH-1); /* End column */
s5l_lcd_write_cmd(R_ROW_ADDR_SET);
s5l_lcd_write_data(0); /* Start row */
s5l_lcd_write_data(LCD_HEIGHT-1); /* End row */
s5l_lcd_write_cmd(R_MEMORY_WRITE);
}
/* Copy display bitmap to hardware */
for (y = 0; y < LCD_HEIGHT; y++) {
for (x = 0; x < LCD_WIDTH; x++) {
pixel = *(p++);
LCD_WDATA = (pixel & 0xff00) >> 8;
LCD_WDATA = pixel & 0xff;
}
}
}
/* Update a fraction of the display. */
void lcd_update_rect(int, int, int, int) ICODE_ATTR;
void lcd_update_rect(int x, int y, int width, int height)
{
(void)x;
(void)y;
(void)width;
(void)height;
/* TODO. For now, just do a full-screen update */
lcd_update();
}
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