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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Adopted for MPIO HD300 by Marcin Bukat
* Copyright (C) 2007 by Jens Arnold
*
* 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 "system.h"
#include "kernel.h"
#include "lcd.h"
/*** definitions ***/
/* LCD command codes */
#define LCD_CNTL_POWER_CONTROL 0x25
#define LCD_CNTL_VOLTAGE_SELECT 0x2b
#define LCD_CNTL_LINE_INVERT_DRIVE 0x36
#define LCD_CNTL_GRAY_SCALE_PATTERN 0x39
#define LCD_CNTL_TEMP_GRADIENT_SELECT 0x4e
#define LCD_CNTL_OSC_FREQUENCY 0x5f
#define LCD_CNTL_ON_OFF 0xae
#define LCD_CNTL_OSC_ON_OFF 0xaa
#define LCD_CNTL_OFF_MODE 0xbe
#define LCD_CNTL_POWER_SAVE 0xa8
#define LCD_CNTL_REVERSE 0xa6
#define LCD_CNTL_ALL_LIGHTING 0xa4
#define LCD_CNTL_COMMON_OUTPUT_STATUS 0xc4
#define LCD_CNTL_COLUMN_ADDRESS_DIR 0xa0
#define LCD_CNTL_NLINE_ON_OFF 0xe4
#define LCD_CNTL_DISPLAY_MODE 0x66
#define LCD_CNTL_DUTY_SET 0x6d
#define LCD_CNTL_ELECTRONIC_VOLUME 0x81
#define LCD_CNTL_DATA_INPUT_DIR 0x84
#define LCD_CNTL_DISPLAY_START_LINE 0x8a
#define LCD_CNTL_AREA_SCROLL 0x10
#define LCD_CNTL_PAGE 0xb1
#define LCD_CNTL_COLUMN 0x13
#define LCD_CNTL_DATA_WRITE 0x1d
/*** shared semi-private declarations ***/
extern const unsigned char lcd_dibits[16] ICONST_ATTR;
/*** hardware configuration ***/
int lcd_default_contrast(void)
{
return DEFAULT_CONTRAST_SETTING;
}
void lcd_set_contrast(int val)
{
/* Keep val in acceptable hw range */
if (val < 0)
val = 0;
else if (val > 127)
val = 127;
lcd_write_command_ex(LCD_CNTL_ELECTRONIC_VOLUME, val, -1);
}
void lcd_set_invert_display(bool yesno)
{
lcd_write_command(LCD_CNTL_REVERSE | (yesno?1:0));
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
if (yesno)
{
lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 1);
lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 0);
lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 0);
}
else
{
lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 0);
lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1);
lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 1);
}
}
void lcd_init_device(void)
{
and_l(~0x00000800, &GPIO_FUNCTION); /* CS3 line */
/* LCD Reset GPO34 */
or_l(0x00000004, &GPIO1_ENABLE); /* set as output */
or_l(0x00000004, &GPIO1_FUNCTION); /* switch to secondary function - GPIO */
and_l(~0x00000004, &GPIO1_OUT); /* RESET low */
sleep(1); /* delay at least 1000 ns */
or_l(0x00000004, &GPIO1_OUT); /* RESET high */
sleep(1);
lcd_write_command(LCD_CNTL_ON_OFF | 1); /* LCD ON */
lcd_write_command(LCD_CNTL_OFF_MODE | 1); /* OFF -> VCC on drivers */
lcd_write_command(LCD_CNTL_REVERSE | 0); /* Reverse OFF */
lcd_write_command(LCD_CNTL_ALL_LIGHTING | 0); /* Normal */
lcd_write_command(LCD_CNTL_COMMON_OUTPUT_STATUS | 1); /* Reverse dir */
lcd_write_command_ex(LCD_CNTL_DISPLAY_START_LINE, 0, -1);
lcd_write_command(LCD_CNTL_COLUMN_ADDRESS_DIR | 0); /* Normal */
lcd_write_command_ex(LCD_CNTL_DISPLAY_MODE, 0, -1); /* Greyscale mode */
lcd_write_command_ex(LCD_CNTL_GRAY_SCALE_PATTERN, 0x53, -1);
lcd_write_command_ex(LCD_CNTL_DUTY_SET, 0x20, 1);
lcd_write_command_ex(LCD_CNTL_ELECTRONIC_VOLUME, 24, -1); /* 0x18 */
lcd_write_command(LCD_CNTL_OSC_ON_OFF | 1); /* Oscillator ON */
lcd_write_command(LCD_CNTL_POWER_SAVE | 0);
lcd_write_command_ex(LCD_CNTL_VOLTAGE_SELECT, 3, -1);
lcd_write_command_ex(LCD_CNTL_POWER_CONTROL, 0x17, -1);
lcd_write_command_ex(LCD_CNTL_OSC_FREQUENCY, 3, -1);
lcd_write_command(LCD_CNTL_NLINE_ON_OFF | 1); /* N-line ON */
lcd_write_command_ex(LCD_CNTL_LINE_INVERT_DRIVE, 0x10, -1);
lcd_write_command_ex(LCD_CNTL_TEMP_GRADIENT_SELECT, 0, -1);
lcd_update();
}
/*** 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)
{
const unsigned char *src, *src_end;
unsigned char *dst_u, *dst_l;
static unsigned char upper[LCD_WIDTH] IBSS_ATTR;
static unsigned char lower[LCD_WIDTH] IBSS_ATTR;
unsigned int byte;
by *= 2;
while (bheight--)
{
src = data;
src_end = data + width;
dst_u = upper;
dst_l = lower;
do
{
byte = *src++;
*dst_u++ = lcd_dibits[byte & 0x0F];
byte >>= 4;
*dst_l++ = lcd_dibits[byte & 0x0F];
}
while (src < src_end);
lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1);
lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1);
lcd_write_command(LCD_CNTL_DATA_WRITE);
lcd_write_data(upper, width);
lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1);
lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1);
lcd_write_command(LCD_CNTL_DATA_WRITE);
lcd_write_data(lower, width);
data += stride;
}
}
/* Helper function for lcd_grey_phase_blit(). */
void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
/* Performance function that works with an external buffer
note that by and bheight are in 4-pixel units! */
void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
int x, int by, int width, int bheight, int stride)
{
stride <<= 2; /* 4 pixels per block */
while (bheight--)
{
lcd_write_command_ex(LCD_CNTL_PAGE, by++, -1);
lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1);
lcd_write_command(LCD_CNTL_DATA_WRITE);
lcd_grey_data(values, phases, width);
values += stride;
phases += 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)
{
/* Setup initial PAGE and COLUMN address
* the addressing circuit will take care of the rest
*/
lcd_write_command_ex(LCD_CNTL_PAGE, 0, -1);
lcd_write_command_ex(LCD_CNTL_COLUMN, 0, -1);
lcd_write_command(LCD_CNTL_DATA_WRITE);
/* Copy display bitmap to hardware */
lcd_write_data (FBADDR(0,0), LCD_WIDTH*LCD_FBHEIGHT);
}
/* 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)
{
int ymax;
/* The Y coordinates have to work on even 8 pixel rows */
ymax = (y + height-1) >> 2;
y >>= 2;
if(x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (width <= 0)
return; /* nothing left to do, 0 is harmful to lcd_write_data() */
if(ymax >= LCD_FBHEIGHT)
ymax = LCD_FBHEIGHT-1;
/* Copy specified rectange bitmap to hardware */
for (; y <= ymax; y++)
{
lcd_write_command_ex(LCD_CNTL_PAGE, y, -1);
lcd_write_command_ex(LCD_CNTL_COLUMN, x, -1);
lcd_write_command(LCD_CNTL_DATA_WRITE);
lcd_write_data (FBADDR(x,y), width);
}
}
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