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rockbox/firmware/target/arm/as3525/sansa-fuze/lcd-fuze.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Dave Chapman
*
* LCD driver for the Sansa Fuze - controller unknown
*
* 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"
static bool display_on = false; /* is the display turned on? */
static bool display_flipped = false;
static int xoffset = 20; /* needed for flip */
/* TODO: Implement this function */
static void lcd_delay(int x)
{
/* This is just arbitrary - the OF does something more complex */
x *= 1024;
while (x--);
}
static void as3525_dbop_init(void)
{
CGU_DBOP = (1<<3) | (4-1);
DBOP_TIMPOL_01 = 0xe167e167;
DBOP_TIMPOL_23 = 0xe167006e;
DBOP_CTRL = 0x41008;
GPIOB_AFSEL = 0xfc;
GPIOC_AFSEL = 0xff;
DBOP_TIMPOL_23 = 0x6000e;
DBOP_CTRL = 0x51008;
DBOP_TIMPOL_01 = 0x6e167;
DBOP_TIMPOL_23 = 0xa167e06f;
/* TODO: The OF calls some other functions here, but maybe not important */
}
static void lcd_write_cmd(int cmd)
{
int x;
/* Write register */
DBOP_CTRL &= ~(1<<14);
DBOP_TIMPOL_23 = 0xa167006e;
DBOP_DOUT = cmd;
/* Wait for fifo to empty */
while ((DBOP_STAT & (1<<10)) == 0);
/* This loop is unique to the Fuze */
x = 0;
do {
asm volatile ("nop\n");
} while (x++ < 4);
DBOP_TIMPOL_23 = 0xa167e06f;
}
void lcd_write_data(const fb_data* p_bytes, int count)
{
while (count--)
{
DBOP_DOUT = *p_bytes++;
/* Wait for fifo to empty */
while ((DBOP_STAT & (1<<10)) == 0);
}
}
static void lcd_write_reg(int reg, int value)
{
unsigned short data = value;
lcd_write_cmd(reg);
lcd_write_data(&data, 1);
}
/*** hardware configuration ***/
void lcd_set_contrast(int val)
{
(void)val;
}
void lcd_set_invert_display(bool yesno)
{
(void)yesno;
}
static void flip_lcd(bool yesno)
{
(void)yesno;
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
display_flipped = yesno;
xoffset = yesno ? 20 : 0; /* A guess */
if (display_on)
flip_lcd(yesno);
}
static void _display_on(void)
{
/* Initialise in the same way as the original firmare */
lcd_write_reg(0x07, 0);
lcd_write_reg(0x13, 0);
lcd_delay(10);
lcd_write_reg(0x11, 0x3704);
lcd_write_reg(0x14, 0x1a1b);
lcd_write_reg(0x10, 0x3860);
lcd_write_reg(0x13, 0x40);
lcd_delay(10);
lcd_write_reg(0x13, 0x60);
lcd_delay(50);
lcd_write_reg(0x13, 0x70);
lcd_delay(40);
lcd_write_reg(0x01, 277);
lcd_write_reg(0x02, (7<<8));
lcd_write_reg(0x03, 0x30);
lcd_write_reg(0x08, 0x01);
lcd_write_reg(0x0b, (1<<10));
lcd_write_reg(0x0c, 0);
lcd_write_reg(0x30, 0x40);
lcd_write_reg(0x31, 0x0687);
lcd_write_reg(0x32, 0x0306);
lcd_write_reg(0x33, 0x104);
lcd_write_reg(0x34, 0x0585);
lcd_write_reg(0x35, 255+66);
lcd_write_reg(0x36, 0x0687+128);
lcd_write_reg(0x37, 259);
lcd_write_reg(0x38, 0);
lcd_write_reg(0x39, 0);
lcd_write_reg(0x42, (LCD_WIDTH - 1));
lcd_write_reg(0x43, 0);
lcd_write_reg(0x44, (LCD_WIDTH - 1));
lcd_write_reg(0x45, 0);
lcd_write_reg(0x46, (((LCD_WIDTH - 1) + xoffset) << 8) | xoffset);
lcd_write_reg(0x47, (LCD_HEIGHT - 1));
lcd_write_reg(0x48, 0x0);
lcd_write_reg(0x07, 0x11);
lcd_delay(40);
lcd_write_reg(0x07, 0x17);
display_on = true; /* must be done before calling lcd_update() */
lcd_update();
}
/* (e.g. 0, 219) */
static void lcd_window_x(int r0, int r1)
{
int r2, r3, r4;
r3 = (LCD_WIDTH - 1);
r2 = (LCD_WIDTH - 1);
if (r0 < LCD_WIDTH)
r2 = r0;
if (r1 < LCD_WIDTH)
r3 = r1;
#if 0
r1 = 0x1db12;
[r1] = 1; /* byte */
#endif
r3 += xoffset;
r4 = r2;
r4 += xoffset;
r0 = (r3 << 8);
r0 |= r4;
r1 = (r0 << 16) >> 16;
lcd_write_reg(0x46, r1);
r1 = (r4 << 16) >> 16;
lcd_write_reg(0x20, r1);
lcd_write_reg(0x03, 0x30);
#if 0
r0 := 0x1e0c4
r1 := 0x216a8
r0 := [r0]
r2 := [r1]
r0 := (r0 >> 2) << 2;
if (r0 != r2) {
#endif
lcd_write_reg(0x00, 0x0001);
lcd_write_reg(0x11, 0x3704);
lcd_write_reg(0x14, 0x1a1b);
lcd_write_reg(0x10, 0x3860);
lcd_write_reg(0x13, 0x0070);
lcd_write_reg(0x07, 0x0017);
lcd_write_reg(0x01, 277);
lcd_write_reg(0x02, (7<<8));
lcd_write_reg(0x08, 0x0001);
lcd_write_reg(0x0b, (1<<10));
lcd_write_reg(0x0c, 0x0000);
lcd_write_reg(0x30, 0x0040);
lcd_write_reg(0x31, 0x0687);
lcd_write_reg(0x32, 0x0306);
lcd_write_reg(0x33, 260);
lcd_write_reg(0x34, 0x0585);
lcd_write_reg(0x35, 255+66);
lcd_write_reg(0x36, 0x687+128);
lcd_write_reg(0x37, 259);
lcd_write_reg(0x38, 0);
lcd_write_reg(0x39, 0);
lcd_write_reg(0x40, 0);
lcd_write_reg(0x41, 0);
lcd_write_reg(0x42, (LCD_WIDTH - 1));
lcd_write_reg(0x43, 0);
lcd_write_reg(0x44, (LCD_WIDTH - 1));
lcd_write_reg(0x45, 0);
lcd_write_reg(0x15, 0);
lcd_write_reg(0x73, 0);
#if 0
}
#endif
}
/* - e.g. 0, 175 */
static void lcd_window_y(int r0, int r1)
{
int r2, r4;
r2 = (LCD_HEIGHT - 1);
r4 = (LCD_HEIGHT - 1);
if (r0 < LCD_HEIGHT)
r4 = r0;
if (r1 < LCD_HEIGHT)
r2 = r1;
r1 = (r2 << 16) >> 16;
lcd_write_reg(0x47, r1);
r1 = (r4 << 16) >> 16;
lcd_write_reg(0x48, r1);
/* ??Start address - (x<<8) | y0 */
lcd_write_reg(0x21, r1);
/* Start write to GRAM */
lcd_write_cmd(0x22);
}
/* I'm guessing this function is lcd_enable, but it may not be... */
void lcd_enable(int r0)
{
#if 0
r4 = 0x1db12;
[r4] = 1;
#endif
if (r0 != 0) {
lcd_write_reg(0, 1);
lcd_delay(10);
lcd_write_reg(0x10, 0);
lcd_write_reg(0x11, 0x3704);
lcd_write_reg(0x14, 0x1a1b);
lcd_write_reg(0x10, 0x3860);
lcd_write_reg(0x13, 0x40);
lcd_delay(10);
lcd_write_reg(0x13, 0x60);
lcd_delay(50);
lcd_write_reg(0x13, 112);
lcd_delay(40);
lcd_write_reg(0x07, 0x11);
lcd_delay(40);
lcd_write_reg(0x07, 0x17);
} else {
lcd_write_reg(0x07, 0x22);
lcd_delay(40);
lcd_write_reg(0x07, 0);
lcd_delay(40);
lcd_write_reg(0x10, 1);
}
#if 0
[r4] = 0;
#endif
}
void lcd_init_device()
{
as3525_dbop_init();
GPIOA_DIR |= (1<<5);
GPIOA_PIN(5) = 0;
GPIOA_PIN(3) = (1<<3);
GPIOA_DIR |= (1<<4) | (1<<3);
GPIOA_PIN(3) = (1<<3);
GPIOA_PIN(4) = 0;
GPIOA_DIR |= (1<<7);
GPIOA_PIN(7) = 0;
CCU_IO &= ~4;
CCU_IO &= ~8;
GPIOD_DIR |= (1<<7);
#if 0
if (byte[0x21b24] == 0) {
GPIOD_PIN(7) = (1<<7);
GPIOD_DIR |= (1<<7);
}
#endif
lcd_delay(1);
GPIOA_PIN(5) = (1<<5);
lcd_delay(1);
_display_on();
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
if (!display_on)
return;
lcd_window_x(0, (LCD_WIDTH - 1));
lcd_window_y(0, (LCD_HEIGHT - 1));
lcd_write_data((unsigned short *)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
}
/* Update a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
int xmax, ymax;
const unsigned short *ptr;
if (!display_on)
return;
xmax = x + width - 1;
if (xmax >= LCD_WIDTH)
xmax = LCD_WIDTH - 1; /* Clip right */
if (x < 0)
x = 0; /* Clip left */
if (x >= xmax)
return; /* nothing left to do */
ymax = y + height;
if (ymax > LCD_HEIGHT)
ymax = LCD_HEIGHT - 1; /* Clip bottom */
if (y < 0)
y = 0; /* Clip top */
if (y >= ymax)
return; /* nothing left to do */
lcd_window_x(x, xmax);
lcd_window_y(y, ymax);
ptr = (unsigned short *)&lcd_framebuffer[y][x];
do
{
lcd_write_data(ptr, width);
ptr += LCD_WIDTH;
}
while (++y < ymax);
lcd_write_data((unsigned short *)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
}
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