rockbox/firmware/target/arm/s5l8700/ipodnano2g/lcd-nano2g.c
Dave Chapman 715d8c63d9 Add auto-detection of Nano 2G LCD type, and an initial attempt at lcd_update() for the second lcd type. This lcd_update works, but not reliably.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21905 a1c6a512-1295-4272-9138-f99709370657
2009-07-16 18:03:09 +00:00

213 lines
5.3 KiB
C

/***************************************************************************
* __________ __ ___.
* 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"
/** hardware access functions */
static void s5l_lcd_write_cmd(unsigned short cmd)
{
while (LCD_STATUS&0x10);
LCD_WCMD = cmd;
}
static void s5l_lcd_write_data(int data)
{
LCD_WDATA = data;
while (LCD_STATUS&0x10);
}
/** globals **/
static int lcd_type;
static int xoffset; /* needed for flip */
/*** hardware configuration ***/
int lcd_default_contrast(void)
{
return 0x1f;
}
void lcd_set_contrast(int val)
{
}
void lcd_set_invert_display(bool 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;
else
lcd_type = 1;
}
/*** Update functions ***/
/* Performance function that works with an external buffer
note that by and bheight are in 8-pixel units! */
void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
int bheight, int stride)
{
/* Copy display bitmap to hardware */
while (bheight--)
{
}
}
/* Performance function that works with an external buffer
note that by and bheight are in 8-pixel units! */
void lcd_blit_grey_phase_blit(unsigned char *values, unsigned char *phases,
int x, int by, int width, int bheight, int stride)
{
(void)values;
(void)phases;
(void)x;
(void)by;
(void)width;
(void)bheight;
(void)stride;
}
/* 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(0x50);
s5l_lcd_write_data(0); /* Start column */
s5l_lcd_write_cmd(0x51);
s5l_lcd_write_data(LCD_WIDTH-1); /* End column */
s5l_lcd_write_cmd(0x52);
s5l_lcd_write_data(0); /* Start row */
s5l_lcd_write_cmd(0x53);
s5l_lcd_write_data(LCD_HEIGHT-1); /* End row */
s5l_lcd_write_cmd(0x20);
s5l_lcd_write_data(0);
s5l_lcd_write_cmd(0x21);
s5l_lcd_write_data(0);
s5l_lcd_write_cmd(0x22);
/* Copy display bitmap to hardware */
for (y = 0; y < LCD_HEIGHT; y++) {
for (x = 0; x < LCD_WIDTH; x++) {
pixel = *(p++);
while (LCD_STATUS&0x10);
LCD_WDATA = pixel & 0xff;
LCD_WDATA = (pixel & 0xff00) >> 8;
}
}
} else {
s5l_lcd_write_cmd(0x3a);
s5l_lcd_write_data(0x65);
s5l_lcd_write_cmd(0x2a);
s5l_lcd_write_data(0); /* Start column, high byte */
s5l_lcd_write_data(0); /* Start column. low byte */
s5l_lcd_write_data(0); /* End column, high byte */
s5l_lcd_write_data(LCD_WIDTH-1); /* End column, low byte */
s5l_lcd_write_cmd(0x2b);
s5l_lcd_write_data(0); /* Start row, high byte */
s5l_lcd_write_data(0); /* Start row, low byte */
s5l_lcd_write_data(0); /* End row, high byte */
s5l_lcd_write_data(LCD_HEIGHT-1); /* End row, low byte */
s5l_lcd_write_cmd(0x2c);
/* Copy display bitmap to hardware */
for (y = 0; y < LCD_HEIGHT; y++) {
for (x = 0; x < LCD_WIDTH; x++) {
pixel = *(p++);
while (LCD_STATUS&0x10);
LCD_WDATA = (pixel & 0xff00) >> 8;
LCD_WDATA = pixel & 0xff;
}
}
}
s5l_lcd_write_cmd(0x29);
}
/* 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;
lcd_update();
}