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rockbox/firmware/target/arm/as3525/sansa-clipzip/lcd-clipzip.c
Bertrik Sikken 401edf8b48 sansa clipzip: implement more functions in the lcd driver 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30376 a1c6a512-1295-4272-9138-f99709370657
2011-08-29 21:05:59 +00:00

341 lines
8.6 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 François Dinel
* Copyright (C) 2008-2009 Rafaël Carré
*
* 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 "lcd.h"
#include "lcd-clip.h"
#include "system.h"
#include "cpu.h"
#define CLAMP(x,min,max) \
if ((x)<(min)) (x)=(min);\
if ((x)>(max)) (x)=(max);
/* the detected lcd type (0 or 1) */
static int lcd_type;
/* initialises the host lcd hardware, returns the lcd type */
int lcd_hw_init(void)
{
/* configure SSP */
bitset32(&CGU_PERI, CGU_SSP_CLOCK_ENABLE);
SSP_CPSR = 8; /* TODO: use AS3525_SSP_PRESCALER, OF uses 8 */
SSP_CR0 = (0 << 8) | /* SCR, serial clock rate divider = 1 */
(1 << 7) | /* SPH, phase = 1 */
(1 << 6) | /* SPO, polarity = 1 */
(0 << 4) | /* FRF, frame format = motorola SPI */
(7 << 0); /* DSS, data size select = 8 bits */
SSP_CR1 = (1 << 3) | /* SOD, slave output disable = 1 */
(0 << 2) | /* MS, master/slave = master */
(1 << 1) | /* SSE, synchronous serial port enabled = true */
(0 << 0); /* LBM, loopback mode = normal */
SSP_IMSC &= ~0xF; /* disable interrupts */
SSP_DMACR &= ~0x3; /* disable DMA */
/* configure GPIO B2 (lcd D/C#) as output */
GPIOB_DIR |= (1<<2);
/* configure GPIO B3 (lcd type detect) as input */
GPIOB_DIR &= ~(1<<3);
/* configure GPIO A5 (lcd reset# ?) as output and set low */
GPIOA_DIR |= (1 << 5);
GPIOA_PIN(5) = 0;
/* detect lcd type on GPIO B3 */
return GPIOB_PIN(3) ? 1 : 0;
}
/* writes a command byte to the LCD */
static void lcd_write_cmd(uint8_t byte)
{
/* wait until not busy */
while (SSP_SR & (1<<4));
/* LCD command mode */
GPIOB_PIN(2) = 0;
/* write data */
SSP_DATA = byte;
/* wait until not busy */
while (SSP_SR & (1<<4));
/* LCD data mode */
GPIOB_PIN(2) = (1 << 2);
}
/* writes a data byte to the LCD */
static void lcd_write_dat(uint8_t data)
{
/* wait while transmit FIFO */
while (!(SSP_SR & (1<<1)));
/* write data */
SSP_DATA = data;
}
/* writes both a command and data value to the lcd */
static void lcd_write(uint8_t cmd, uint8_t data)
{
lcd_write_cmd(cmd);
lcd_write_dat(data);
}
/* delays during lcd initialisation (for type 0 LCDs) */
static void lcd_delay(int us)
{
udelay(us);
}
/* initialises lcd type 0 */
static void lcd_init_type0(void)
{
lcd_write(0x01, 0x00);
lcd_write(0x14, 0x01);
lcd_delay(5);
lcd_write(0x14, 0x00);
lcd_delay(5);
lcd_write(0x0F, 0x41);
lcd_write(0xEA, 0x0A);
lcd_write(0xEB, 0x42);
lcd_write(0x18, 0x08);
lcd_write(0x1A, 0x0B);
lcd_write(0x48, 0x03);
/* lcd width/height */
lcd_write(0x30, 0x00);
lcd_write(0x31, 0x5F);
lcd_write(0x32, 0x00);
lcd_write(0x33, 0x5F);
lcd_write(0xE0, 0x10);
lcd_write(0xE1, 0x00);
lcd_write(0xE5, 0x00);
lcd_write(0x0D, 0x00);
lcd_write(0x1D, 0x01);
lcd_write(0x09, 0x00);
lcd_write(0x13, 0x00);
lcd_write(0x16, 0x05);
lcd_write(0x3A, 0x03);
lcd_write(0x3B, 0x03);
lcd_write(0x3C, 0x03);
lcd_write(0x3D, 0x45);
lcd_write(0x3E, 0x45);
lcd_write(0x3F, 0x45);
lcd_write(0x40, 0x62);
lcd_write(0x41, 0x3D);
lcd_write(0x42, 0x46);
}
/* writes a table entry (for type 1 LCDs) */
static void lcd_write_table(uint8_t val)
{
lcd_write_dat((val >> 4) & 0x07);
lcd_write_dat((val >> 0) & 0x0F);
}
/* initialises lcd type 1 */
static void lcd_init_type1(void)
{
static const uint8_t curve[256] = {
/* 5-bit curve */
0, 5, 10, 15, 20, 25, 30, 35, 39, 43, 47, 51, 55, 59, 63, 67,
71, 75, 79, 83, 87, 91, 95, 99, 103, 105, 109, 113, 117, 121, 123, 127,
/* 6-bit curve */
0, 2, 4, 6, 8, 10, 12, 16, 18, 24, 26, 28, 30, 32, 34, 36,
38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68,
70, 72, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102,
104, 106, 108, 110, 112, 114, 116, 118, 120, 121, 122, 123, 124, 125, 126, 127,
/* 5-bit curve */
0, 5, 10, 15, 20, 25, 30, 35, 39, 43, 47, 51, 55, 59, 63, 67,
71, 75, 79, 83, 87, 91, 93, 97, 101, 105, 109, 113, 117, 121, 124, 127
};
int i;
lcd_write_cmd(0x02);
lcd_write_dat(0x00);
lcd_write_cmd(0x01);
lcd_write_cmd(0x03);
lcd_write_dat(0x00);
lcd_write_cmd(0x04);
lcd_write_dat(0x03);
lcd_write_cmd(0x05);
lcd_write_dat(0x08);
lcd_write_cmd(0x06);
lcd_write_dat(0x00);
lcd_write_cmd(0x07);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_dat(0x04);
lcd_write_dat(0x1F);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_dat(0x05);
lcd_write_dat(0x0F);
lcd_write_cmd(0x08);
lcd_write_dat(0x01);
lcd_write_cmd(0x09);
lcd_write_dat(0x07);
/* lcd width/height */
lcd_write_cmd(0x0A);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_dat(0x05);
lcd_write_dat(0x0F);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_dat(0x05);
lcd_write_dat(0x0F);
lcd_write_cmd(0x0B);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_cmd(0x0E);
lcd_write_dat(0x04);
lcd_write_dat(0x02);
lcd_write_dat(0x02);
lcd_write_dat(0x05);
lcd_write_dat(0x03);
lcd_write_dat(0x0F);
lcd_write_cmd(0x0F);
lcd_write_dat(0x0A);
lcd_write_dat(0x0A);
lcd_write_dat(0x0A);
lcd_write_cmd(0x1C);
lcd_write_dat(0x08);
lcd_write_cmd(0x1D);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_dat(0x00);
lcd_write_cmd(0x1E);
lcd_write_dat(0x05);
lcd_write_cmd(0x1F);
lcd_write_dat(0x00);
lcd_write_cmd(0x30);
lcd_write_dat(0x10);
lcd_write_cmd(0x3A);
for (i = 0; i < 256; i++) {
lcd_write_table(curve[i]);
}
lcd_write_cmd(0x3C);
lcd_write_dat(0x00);
lcd_write_cmd(0x3D);
lcd_write_dat(0x00);
}
/* initialises the lcd */
void lcd_init_device(void)
{
lcd_type = lcd_hw_init();
if (lcd_type == 0) {
lcd_init_type0();
}
else {
lcd_init_type1();
}
}
/* sets up the lcd to receive frame buffer data */
static void lcd_setup_rect(int x, int x_end, int y, int y_end)
{
if (lcd_type == 0) {
lcd_write(0x34, x);
lcd_write(0x35, x_end);
lcd_write(0x36, y);
lcd_write(0x37, y_end);
}
else {
lcd_write_cmd(0x0A);
lcd_write_dat((x >> 8) & 0xFF);
lcd_write_dat((x >> 0) & 0xFF);
lcd_write_dat((x_end >> 8) & 0xFF);
lcd_write_dat((x_end >> 0) & 0xFF);
lcd_write_dat((y >> 8) & 0xFF);
lcd_write_dat((y >> 0) & 0xFF);
lcd_write_dat((y_end >> 8) & 0xFF);
lcd_write_dat((y_end >> 0) & 0xFF);
}
}
/* Updates a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
fb_data *ptr;
fb_data pixel;
int row, col;
int x_end = x + width - 1;
int y_end = y + height - 1;
/* check/correct bounds */
CLAMP(x, 0, LCD_WIDTH - 1);
CLAMP(x_end, 0, LCD_WIDTH - 1);
CLAMP(y, 0, LCD_HEIGHT - 1);
CLAMP(y_end, 0, LCD_HEIGHT - 1);
if ((x > x_end) || (y > y_end)) {
return;
}
/* setup GRAM write window */
lcd_setup_rect(x, x_end, y, y_end);
/* write to GRAM */
lcd_write_cmd((lcd_type == 0) ? 0x08 : 0x0C);
for (row = y; row <= y_end; row++) {
ptr = &lcd_framebuffer[row][x];
for (col = x; col <= x_end; col++) {
pixel = *ptr++;
lcd_write_dat((pixel >> 8) & 0xFF);
lcd_write_dat((pixel >> 0) & 0xFF);
}
}
}
/* updates the entire lcd */
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
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