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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Barry Wardell
*
* 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"
#include "kernel.h"
#include "system.h"
/* register defines for TL1771 */
#define R_START_OSC 0x00
#define R_DEVICE_CODE_READ 0x00
#define R_DRV_OUTPUT_CONTROL 0x01
#define R_DRV_AC_CONTROL 0x02
#define R_ENTRY_MODE 0x03
#define R_DISP_CONTROL1 0x07
#define R_DISP_CONTROL2 0x08
#define R_FRAME_CYCLE_CONTROL 0x0b
#define R_POWER_CONTROL1 0x10
#define R_POWER_CONTROL2 0x11
#define R_POWER_CONTROL3 0x12
#define R_POWER_CONTROL4 0x13
#define R_POWER_CONTROL5 0x14
#define R_RAM_ADDR_SET 0x21
#define R_WRITE_DATA_2_GRAM 0x22
#define R_GAMMA_FINE_ADJ_POS1 0x30
#define R_GAMMA_FINE_ADJ_POS2 0x31
#define R_GAMMA_FINE_ADJ_POS3 0x32
#define R_GAMMA_GRAD_ADJ_POS 0x33
#define R_GAMMA_FINE_ADJ_NEG1 0x34
#define R_GAMMA_FINE_ADJ_NEG2 0x35
#define R_GAMMA_FINE_ADJ_NEG3 0x36
#define R_GAMMA_GRAD_ADJ_NEG 0x37
#define R_POWER_CONTROL6 0x38
#define R_GATE_SCAN_START_POS 0x40
#define R_1ST_SCR_DRV_POS 0x42
#define R_2ND_SCR_DRV_POS 0x43
#define R_HORIZ_RAM_ADDR_POS 0x44
#define R_VERT_RAM_ADDR_POS 0x45
static inline void lcd_wait_write(void)
{
while (LCD2_PORT & LCD2_BUSY_MASK);
}
/* Send command */
static inline void lcd_send_cmd(unsigned v)
{
lcd_wait_write();
LCD2_PORT = LCD2_CMD_MASK;
LCD2_PORT = LCD2_CMD_MASK | v;
}
/* Send 16-bit data */
static inline void lcd_send_data(unsigned v)
{
lcd_wait_write();
LCD2_PORT = LCD2_DATA_MASK | (v >> 8); /* Send MSB first */
LCD2_PORT = LCD2_DATA_MASK | (v & 0xff);
}
/* Write value to register */
static void lcd_write_reg(int reg, int val)
{
lcd_send_cmd(reg);
lcd_send_data(val);
}
/*** hardware configuration ***/
void lcd_set_contrast(int val)
{
/* TODO: Implement lcd_set_contrast() */
(void)val;
}
void lcd_set_invert_display(bool yesno)
{
/* TODO: Implement lcd_set_invert_display() */
(void)yesno;
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
/* TODO: Implement lcd_set_flip() */
(void)yesno;
}
/* LCD init */
void lcd_init_device(void)
{
#ifndef BOOTLOADER
/* The OF won't boot if this is done in the bootloader - ideally we should
tweak the lcd controller speed settings but this will do for now */
CLCD_CLOCK_SRC |= 0xc0000000; /* Set LCD interface clock to PLL */
#endif
/* H10 LCD is initialised by the bootloader */
}
/*** update functions ***/
/* Update a fraction of the display. */
void lcd_update_rect(int x0, int y0, int width, int height)
{
int x1, y1;
int newx,newwidth;
unsigned long *addr;
/* Ensure x and width are both even - so we can read 32-bit aligned
data from lcd_framebuffer */
newx=x0&~1;
newwidth=width&~1;
if (newx+newwidth < x0+width) { newwidth+=2; }
x0=newx; width=newwidth;
/* calculate the drawing region */
y1 = (y0 + height) - 1; /* max vert */
x1 = (x0 + width) - 1; /* max horiz */
/* swap max horiz < start horiz */
if (y1 < y0) {
int t;
t = y0;
y0 = y1;
y1 = t;
}
/* swap max vert < start vert */
if (x1 < x0) {
int t;
t = x0;
x0 = x1;
x1 = t;
}
/* max horiz << 8 | start horiz */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (x1 << 8) | x0);
/* max vert << 8 | start vert */
lcd_write_reg(R_VERT_RAM_ADDR_POS, (y1 << 8) | y0);
/* start vert << 8 | start horiz */
lcd_write_reg(R_RAM_ADDR_SET, (y0 << 8) | x0);
/* start drawing */
lcd_send_cmd(R_WRITE_DATA_2_GRAM);
addr = (unsigned long*)FBADDR(x0,y0);
while (height > 0) {
int c, r;
int h, pixels_to_write;
pixels_to_write = (width * height) * 2;
h = height;
/* calculate how much we can do in one go */
if (pixels_to_write > 0x10000) {
h = (0x10000/2) / width;
pixels_to_write = (width * h) * 2;
}
LCD2_BLOCK_CTRL = 0x10000080;
LCD2_BLOCK_CONFIG = 0xc0010000 | (pixels_to_write - 1);
LCD2_BLOCK_CTRL = 0x34000000;
/* for each row */
for (r = 0; r < h; r++) {
/* for each column */
for (c = 0; c < width; c += 2) {
while (!(LCD2_BLOCK_CTRL & LCD2_BLOCK_TXOK));
/* output 2 pixels */
LCD2_BLOCK_DATA = *addr++;
}
addr += (LCD_WIDTH - width)/2;
}
while (!(LCD2_BLOCK_CTRL & LCD2_BLOCK_READY));
LCD2_BLOCK_CONFIG = 0;
height -= h;
}
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
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