386 lines
8.3 KiB
C
386 lines
8.3 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) 2007 by Greg White
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* Copyright (C) 2009 by Bob Cousins
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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 "system.h"
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#include "kernel.h"
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#include "lcd.h"
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#include "lcd-target.h"
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extern bool lcd_on; /* lcd-memframe.c */
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#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
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static bool lcd_powered = true;
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#endif
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static unsigned int LCDBANK(unsigned int address)
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{
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return ((address >> 22) & 0xff);
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}
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static unsigned int LCDBASEU(unsigned int address)
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{
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return (address & ((1 << 22)-1)) >> 1;
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}
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static unsigned int LCDBASEL(unsigned int address)
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{
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address += 320*240*2;
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return (address & ((1 << 22)-1)) >> 1;
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}
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static inline void delay_cycles(volatile int delay)
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{
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while(delay>0) delay--;
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}
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static void LCD_CTRL_setup(void)
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{
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LCDCON1 = (LCD_CLKVAL << 8) | (LCD_MMODE << 7) | (LCD_PNRMODE << 5) |
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(LCD_BPPMODE << 1);
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LCDCON2 = (LCD_UPPER_MARGIN << 24) | ((LCD_HEIGHT - 1) << 14) |
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(LCD_LOWER_MARGIN << 6) | (LCD_VSYNC_LEN << 0);
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LCDCON3 = (LCD_LEFT_MARGIN << 19) | ((LCD_WIDTH - 1) << 8) |
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(LCD_RIGHT_MARGIN << 0);
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LCDCON4 = (LCD_HSYNC_LEN << 0);
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/* HWSWP = 1, INVVFRAM = 1, INVVLINE = 1, FRM565 = 1, All others = 0 */
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LCDCON5 = 0xB01;
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LCDSADDR1 = (LCDBANK((unsigned)FRAME) << 21) | (LCDBASEU((unsigned)FRAME));
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LCDSADDR2 = LCDBASEL((unsigned)FRAME);
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LCDSADDR3 = 0x000000F0;
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}
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static void LCD_CTRL_clock(bool onoff)
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{
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if(onoff)
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{
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GPCCON &=~0xFFF000FC;
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GPCCON |= 0xAAA000A8;
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GPCUP |= 0xFC0E;
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GPDCON &=~0xFFF0FFF0;
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GPDCON |= 0xAAA0AAA0;
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GPDUP |= 0xFCFC;
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bitset32(&CLKCON, 0x20); /* enable LCD clock */
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LCDCON1 |= LCD_ENVID;
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}
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else
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{
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GPCCON &= ~0xFFF000FC;
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GPCUP &= ~0xFC0E;
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GPDCON &= ~0xFFF0FFF0;
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GPDUP &= ~0xFCFC;
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LCDCON1 &= ~LCD_ENVID; /* Must disable first or bus may freeze */
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bitclr32(&CLKCON, 0x20); /* disable LCD clock */
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}
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}
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#ifdef GIGABEAT_F
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static void reset_LCD(bool reset)
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{
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GPBCON&=~0xC000;
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GPBCON|=0x4000;
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if(reset)
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GPBDAT|=0x80;
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else
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GPBDAT&=~0x80;
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}
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#endif
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/****************************************************************************/
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#ifdef GIGABEAT_F
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static void LCD_SPI_send(const unsigned char *array, int count)
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{
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while (count--)
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{
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while ((SPSTA0&0x01)==0){};
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SPTDAT0=*array++;
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}
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}
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static void LCD_SPI_setreg(unsigned char reg, unsigned char value)
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{
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unsigned char regval[] =
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{
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0x00,reg,0x01,value
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};
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LCD_SPI_send(regval, sizeof(regval));
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}
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static void LCD_SPI_SS(bool select)
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{
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delay_cycles(0x4FFF);
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GPBCON&=~0x30000;
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GPBCON|=0x10000;
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if(select)
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GPBDAT|=0x100;
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else
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GPBDAT&=~0x100;
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}
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static void LCD_SPI_start(void)
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{
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bitset32(&CLKCON, 0x40000); /* enable SPI clock */
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LCD_SPI_SS(false);
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SPCON0=0x3E;
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SPPRE0=24;
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reset_LCD(true);
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LCD_SPI_SS(true);
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}
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static void LCD_SPI_stop(void)
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{
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LCD_SPI_SS(false);
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SPCON0 &= ~0x10;
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bitclr32(&CLKCON, 0x40000); /* disable SPI clock */
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}
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static void LCD_SPI_init(void)
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{
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/*
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* SPI setup - Some of these registers are known; they are documented in
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* the wiki. Many thanks to Alex Gerchanovsky for discovering this
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* sequence.
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*/
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LCD_CTRL_clock(true);
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LCD_SPI_start();
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LCD_SPI_setreg(0x0F, 0x01);
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LCD_SPI_setreg(0x09, 0x06);
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LCD_SPI_setreg(0x16, 0xA6);
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LCD_SPI_setreg(0x1E, 0x49);
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LCD_SPI_setreg(0x1F, 0x26);
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LCD_SPI_setreg(0x0B, 0x2F);
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LCD_SPI_setreg(0x0C, 0x2B);
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LCD_SPI_setreg(0x19, 0x5E);
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LCD_SPI_setreg(0x1A, 0x15);
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LCD_SPI_setreg(0x1B, 0x15);
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LCD_SPI_setreg(0x1D, 0x01);
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LCD_SPI_setreg(0x00, 0x03);
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LCD_SPI_setreg(0x01, 0x10);
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LCD_SPI_setreg(0x02, 0x0A);
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LCD_SPI_setreg(0x06, 0x04); /* Set the orientation */
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LCD_SPI_setreg(0x08, 0x2E);
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LCD_SPI_setreg(0x24, 0x12);
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LCD_SPI_setreg(0x25, 0x3F);
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LCD_SPI_setreg(0x26, 0x0B);
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LCD_SPI_setreg(0x27, 0x00);
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LCD_SPI_setreg(0x28, 0x00);
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LCD_SPI_setreg(0x29, 0xF6);
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LCD_SPI_setreg(0x2A, 0x03);
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LCD_SPI_setreg(0x2B, 0x0A);
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LCD_SPI_setreg(0x04, 0x01); /* Turn the display on */
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LCD_SPI_stop();
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}
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#endif
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/****************************************************************************/
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/* LCD init */
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void lcd_init_device(void)
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{
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#ifdef BOOTLOADER
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int i;
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/* When the Rockbox bootloader starts the framebuffer address is changed
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* but the LCD display should stay the same til an lcd_update() occurs.
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* This copies the data from the old framebuffer to the new one to make the
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* change non-visable to the user.
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*/
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unsigned short *buf = (unsigned short*)(FRAME);
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unsigned short *oldbuf = (unsigned short*)(LCDSADDR1<<1);
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/* The Rockbox bootloader is transitioning from RGB555I to RGB565 mode
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so convert the frambuffer data accordingly */
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for(i=0; i< 320*240; i++)
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{
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*(buf++) = ((*oldbuf>>1) & 0x1F) | (*oldbuf & 0xffc0);
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oldbuf++;
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}
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#endif
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/* Set pins up */
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GPHUP &= 0x600;
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GPECON |= 0x0A800000;
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GPEUP |= 0x3800;
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#ifdef GIGABEAT_F
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GPBUP |= 0x181;
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#endif
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bitset32(&CLKCON, 0x20); /* enable LCD clock */
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LCD_CTRL_setup();
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#ifdef GIGABEAT_F
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LCD_SPI_init();
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#else
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LCD_CTRL_clock(true);
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#endif
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lcd_on = true;
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}
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#if defined(HAVE_LCD_SLEEP)
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static void LCD_SPI_powerdown(void)
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{
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lcd_powered = false;
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LCD_SPI_start();
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LCD_SPI_setreg(0x04, 0x00);
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LCD_SPI_stop();
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reset_LCD(false); /* This makes a big difference on power */
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LCD_CTRL_clock(false);
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}
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void lcd_sleep(void)
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{
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if (lcd_powered)
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{
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/* "not powered" implies "disabled" */
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lcd_enable(false);
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LCD_SPI_powerdown();
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}
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}
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#endif
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#if defined(HAVE_LCD_ENABLE)
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static void LCD_SPI_powerup(void)
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{
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LCD_CTRL_clock(true);
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LCD_SPI_start();
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LCD_SPI_setreg(0x04, 0x01);
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LCD_SPI_stop();
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lcd_powered = true;
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}
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void lcd_enable(bool state)
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{
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if (state == lcd_on)
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return;
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if(state)
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{
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/* "enabled" implies "powered" */
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if (!lcd_powered)
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{
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LCD_SPI_powerup();
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/* Wait long enough for a frame to be written - yes, it
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* takes awhile. */
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sleep(HZ/5);
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}
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lcd_on = true;
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lcd_update();
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send_event(LCD_EVENT_ACTIVATION, NULL);
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}
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else
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{
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lcd_on = false;
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}
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}
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#endif
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#ifdef GIGABEAT_F
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void lcd_set_flip(bool yesno)
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{
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if (!lcd_on)
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return;
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LCD_SPI_start();
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if(yesno)
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{
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LCD_SPI_setreg(0x06, 0x02);
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}
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else
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{
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LCD_SPI_setreg(0x06, 0x04);
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}
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LCD_SPI_stop();
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}
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int lcd_default_contrast(void)
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{
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return DEFAULT_CONTRAST_SETTING;
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}
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void lcd_set_contrast(int val)
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{
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if (!lcd_on)
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return;
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LCD_SPI_start();
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LCD_SPI_setreg(0x0B, (unsigned char) val);
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LCD_SPI_stop();
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}
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void lcd_set_invert_display(bool yesno)
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{
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if (!lcd_on)
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return;
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LCD_SPI_start();
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if(yesno)
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{
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LCD_SPI_setreg(0x27, 0x10);
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}
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else
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{
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LCD_SPI_setreg(0x27, 0x00);
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}
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LCD_SPI_stop();
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}
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#else
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void lcd_set_flip(bool yesno)
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{
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(void)yesno;
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/* Not implemented */
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}
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int lcd_default_contrast(void)
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{
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return DEFAULT_CONTRAST_SETTING;
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}
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void lcd_set_contrast(int val)
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{
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(void)val;
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/* Not implemented */
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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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/* Not implemented */
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}
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#endif
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