be84fcffbd
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20027 a1c6a512-1295-4272-9138-f99709370657
360 lines
8.4 KiB
C
360 lines
8.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2008 by Dave Chapman
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*
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* LCD driver for the Sansa Fuze - controller unknown
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "cpu.h"
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#include "lcd.h"
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#include "file.h"
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#include "debug.h"
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#include "system.h"
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#include "clock-target.h"
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/* The controller is unknown, but some registers appear to be the same as the
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HD66789R */
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#define R_ENTRY_MODE 0x03
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#define R_RAM_ADDR_SET 0x21
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#define R_WRITE_DATA_2_GRAM 0x22
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#define R_ENTRY_MODE_HORZ 0x7030
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static bool display_on = false; /* is the display turned on? */
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static bool display_flipped = false;
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static int xoffset = 20; /* needed for flip */
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static volatile int _ystart, _ymax, _xstart, _xmax;
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static void as3525_dbop_init(void)
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{
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CGU_DBOP = (1<<3) | CLK_DIV(AS3525_PCLK_FREQ, AS3525_DBOP_FREQ);
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DBOP_TIMPOL_01 = 0xe167e167;
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DBOP_TIMPOL_23 = 0xe167006e;
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DBOP_CTRL = 0x41008;
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GPIOB_AFSEL = 0xfc;
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GPIOC_AFSEL = 0xff;
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DBOP_TIMPOL_23 = 0x6000e;
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DBOP_CTRL = 0x51008;
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DBOP_TIMPOL_01 = 0x6e167;
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DBOP_TIMPOL_23 = 0xa167e06f;
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/* TODO: The OF calls some other functions here, but maybe not important */
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}
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static void lcd_write_cmd(int cmd)
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{
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int x;
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/* Write register */
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DBOP_CTRL &= ~(1<<14);
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DBOP_TIMPOL_23 = 0xa167006e;
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DBOP_DOUT = cmd;
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/* Wait for fifo to empty */
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while ((DBOP_STAT & (1<<10)) == 0);
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/* This loop is unique to the Fuze */
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x = 0;
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do {
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asm volatile ("nop\n");
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} while (x++ < 4);
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DBOP_TIMPOL_23 = 0xa167e06f;
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}
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void lcd_write_data(const fb_data* p_bytes, int count)
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{
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while (count--)
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{
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DBOP_DOUT = *p_bytes++;
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/* Wait for fifo to empty */
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while ((DBOP_STAT & (1<<10)) == 0);
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}
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}
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static void lcd_write_reg(int reg, int value)
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{
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unsigned short data = value;
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lcd_write_cmd(reg);
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lcd_write_data(&data, 1);
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}
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/*** hardware configuration ***/
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void lcd_set_contrast(int val)
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{
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(void)val;
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}
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void lcd_set_invert_display(bool yesno)
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{
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(void)yesno;
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}
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static void flip_lcd(bool yesno)
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{
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(void)yesno;
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}
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/* turn the display upside down (call lcd_update() afterwards) */
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void lcd_set_flip(bool yesno)
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{
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display_flipped = yesno;
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xoffset = yesno ? 0 : 20; /* TODO: Implement flipped mode */
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if (display_on)
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flip_lcd(yesno);
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}
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static void _display_on(void)
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{
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/* Initialise in the same way as the original firmare */
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lcd_write_reg(0x07, 0);
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lcd_write_reg(0x13, 0);
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lcd_write_reg(0x11, 0x3704);
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lcd_write_reg(0x14, 0x1a1b);
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lcd_write_reg(0x10, 0x3860);
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lcd_write_reg(0x13, 0x40);
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lcd_write_reg(0x13, 0x60);
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lcd_write_reg(0x13, 0x70);
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lcd_write_reg(0x01, 277);
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lcd_write_reg(0x02, (7<<8));
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lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
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lcd_write_reg(0x08, 0x01);
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lcd_write_reg(0x0b, (1<<10));
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lcd_write_reg(0x0c, 0);
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lcd_write_reg(0x30, 0x40);
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lcd_write_reg(0x31, 0x0687);
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lcd_write_reg(0x32, 0x0306);
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lcd_write_reg(0x33, 0x104);
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lcd_write_reg(0x34, 0x0585);
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lcd_write_reg(0x35, 255+66);
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lcd_write_reg(0x36, 0x0687+128);
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lcd_write_reg(0x37, 259);
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lcd_write_reg(0x38, 0);
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lcd_write_reg(0x39, 0);
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lcd_write_reg(0x42, (LCD_WIDTH - 1));
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lcd_write_reg(0x43, 0);
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lcd_write_reg(0x44, (LCD_WIDTH - 1));
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lcd_write_reg(0x45, 0);
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lcd_write_reg(0x46, (((LCD_WIDTH - 1) + xoffset) << 8) | xoffset);
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lcd_write_reg(0x47, (LCD_HEIGHT - 1));
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lcd_write_reg(0x48, 0x0);
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lcd_write_reg(0x07, 0x11);
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lcd_write_reg(0x07, 0x17);
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display_on = true; /* must be done before calling lcd_update() */
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lcd_update();
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}
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void lcd_enable(bool on)
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{
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if (display_on == on)
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return; /* nothing to do */
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if(on)
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{
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int delay = 0x200000;
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lcd_write_reg(0, 1);
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lcd_write_reg(0x10, 0);
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lcd_write_reg(0x11, 0x3704);
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lcd_write_reg(0x14, 0x1a1b);
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lcd_write_reg(0x10, 0x3860);
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lcd_write_reg(0x13, 0x40);
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lcd_write_reg(0x13, 0x60);
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lcd_write_reg(0x13, 112);
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lcd_write_reg(0x07, 0x11);
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lcd_write_reg(0x07, 0x17);
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display_on = true;
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/* a bit of delay before returning to
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* avoid irritating flash on backlight on */
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while(delay--);
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}
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else
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{
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lcd_write_reg(0x07, 0x22);
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lcd_write_reg(0x07, 0);
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lcd_write_reg(0x10, 1);
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display_on = false;
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}
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}
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bool lcd_enabled(void)
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{
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return display_on;
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}
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void lcd_sleep(void)
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{
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/* TODO */
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}
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/*** update functions ***/
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/* Performance function to blit a YUV bitmap directly to the LCD
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* src_x, src_y, width and height should be even
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* x, y, width and height have to be within LCD bounds
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*/
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void lcd_blit_yuv(unsigned char * const src[3],
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int src_x, int src_y, int stride,
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int x, int y, int width, int height)
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{
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(void)src;
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(void)src_x;
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(void)src_y;
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(void)stride;
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(void)x;
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(void)y;
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(void)width;
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(void)height;
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}
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void lcd_init_device()
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{
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as3525_dbop_init();
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GPIOA_DIR |= (1<<7|1<<5|1<<4|1<<3);
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GPIOA_PIN(5) = 0;
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GPIOA_PIN(3) = (1<<3);
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GPIOA_PIN(4) = 0;
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GPIOA_PIN(7) = 0;
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GPIOA_PIN(5) = (1<<5);
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_display_on();
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}
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/* Set horizontal window addresses */
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void lcd_window_x(int xmin, int xmax)
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{
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xmin += xoffset;
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xmax += xoffset;
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lcd_write_reg(0x46, (xmax << 8) | xmin);
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lcd_write_reg(0x20, xmin);
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}
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/* Set vertical window addresses */
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void lcd_window_y(int ymin, int ymax)
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{
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lcd_write_reg(0x47, ymax);
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lcd_write_reg(0x48, ymin);
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lcd_write_reg(0x21, ymin);
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}
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/* Update the display.
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This must be called after all other LCD functions that change the display. */
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void lcd_update(void)
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{
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if (!display_on)
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return;
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lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
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/* we must disable interrupts because buttondriver also writes to lcd */
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disable_irq();
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lcd_window_x(0, LCD_WIDTH - 1);
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lcd_window_y(0, LCD_HEIGHT - 1);
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/* Start write to GRAM */
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lcd_write_cmd(R_WRITE_DATA_2_GRAM);
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/* Write data */
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lcd_write_data((unsigned short *)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
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enable_irq();
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}
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/* Update a fraction of the display. */
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void lcd_update_rect(int x, int y, int width, int height)
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{
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int xmax, ymax;
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const unsigned short *ptr;
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if (!display_on)
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return;
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xmax = x + width;
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if (xmax >= LCD_WIDTH)
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xmax = LCD_WIDTH - 1; /* Clip right */
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if (x < 0)
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x = 0; /* Clip left */
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if (x >= xmax)
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return; /* nothing left to do */
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width = xmax - x + 1; /* Fix width */
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ymax = y + height;
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if (ymax >= LCD_HEIGHT)
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ymax = LCD_HEIGHT - 1; /* Clip bottom */
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if (y < 0)
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y = 0; /* Clip top */
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if (y >= ymax)
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return; /* nothing left to do */
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lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
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/* we must disable interrupts because buttondriver also writes to lcd */
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disable_irq();
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lcd_window_x(x, xmax);
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lcd_window_y(y, ymax);
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/* Start write to GRAM */
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lcd_write_cmd(R_WRITE_DATA_2_GRAM);
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ptr = (unsigned short *)&lcd_framebuffer[y][x];
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do
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{
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lcd_write_data(ptr, width);
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ptr += LCD_WIDTH;
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}
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while (++y <= ymax);
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enable_irq();
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}
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/* writes one read pixel outside the visible area, needed for correct dbop reads */
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void lcd_button_support(void)
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{
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fb_data data = 0xf<<12;
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lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_HORZ);
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/* Set start position and window */
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lcd_window_x(-1, 1);
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lcd_write_cmd(R_WRITE_DATA_2_GRAM);
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lcd_write_data(&data, 1);
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}
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