2164aab902
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30891 a1c6a512-1295-4272-9138-f99709370657
161 lines
4.7 KiB
C
161 lines
4.7 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) 2011 Marcin Bukat
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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 "kernel.h"
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#include "lcd.h"
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#include "system.h"
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#include "cpu.h"
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#include "lcdif-rk27xx.h"
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unsigned int lcd_data_transform(unsigned int data)
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{
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unsigned int r, g, b;
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#if defined(RK27_GENERIC)
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/* 18 bit interface */
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r = (data & 0x0000fc00)<<8;
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/* g = ((data & 0x00000300) >> 2) | ((data & 0x000000e0) >> 3); */
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g = ((data & 0x00000300) << 6) | ((data & 0x000000e0) << 5);
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b = (data & 0x00000001f) << 3;
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#elif defined(HM60X) || defined(HM801)
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/* 16 bit interface */
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r = (data & 0x0000f800) << 8;
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g = (data & 0x000007e0) << 5;
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b = (data & 0x0000001f) << 3;
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#else
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#error "Unknown target"
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#endif
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return (r | g | b);
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}
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void lcd_cmd(unsigned int cmd)
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{
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LCD_COMMAND = lcd_data_transform(cmd);
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}
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void lcd_data(unsigned int data)
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{
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LCD_DATA = lcd_data_transform(data);
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}
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void lcd_write_reg(unsigned int reg, unsigned int val)
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{
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lcd_cmd(reg);
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lcd_data(val);
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}
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static void lcdctrl_bypass(unsigned int on_off)
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{
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while (!(LCDC_STA & LCDC_MCU_IDLE));
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if (on_off)
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MCU_CTRL |= MCU_CTRL_BYPASS;
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else
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MCU_CTRL &= ~MCU_CTRL_BYPASS;
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}
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/* This part is unclear. I am unable to use buffered/FIFO based writes
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* to lcd. Depending on settings of IF I get various patterns on display
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* but not what I want to display apparently.
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*/
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static void lcdctrl_init(void)
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{
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/* alpha b111
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* stop at current frame complete
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* MCU mode
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* 24b RGB
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*/
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LCDC_CTRL = ALPHA(7) | LCDC_STOP | LCDC_MCU | RGB24B;
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MCU_CTRL = ALPHA_BASE(0x3f) | MCU_CTRL_BYPASS;
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HOR_ACT = LCD_WIDTH + 3; /* define horizonatal active region */
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VERT_ACT = LCD_HEIGHT; /* define vertical active region */
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VERT_PERIOD = 0xfff; /* CSn/WEn/RDn signal timings */
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LINE0_YADDR = LINE_ALPHA_EN | 0x7fe;
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LINE1_YADDR = LINE_ALPHA_EN | ((1 * LCD_WIDTH) - 2);
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LINE2_YADDR = LINE_ALPHA_EN | ((2 * LCD_WIDTH) - 2);
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LINE3_YADDR = LINE_ALPHA_EN | ((3 * LCD_WIDTH) - 2);
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LINE0_UVADDR = 0x7fe + 1;
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LINE1_UVADDR = ((1 * LCD_WIDTH) - 2 + 1);
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LINE2_UVADDR = ((2 * LCD_WIDTH) - 2 + 1);
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LINE3_UVADDR = ((3 * LCD_WIDTH) - 2 + 1);
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#if 0
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LINE0_YADDR = 0;
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LINE1_YADDR = (1 * LCD_WIDTH);
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LINE2_YADDR = (2 * LCD_WIDTH);
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LINE3_YADDR = (3 * LCD_WIDTH);
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LINE0_UVADDR = 1;
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LINE1_UVADDR = (1 * LCD_WIDTH) + 1;
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LINE2_UVADDR = (2 * LCD_WIDTH) + 1;
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LINE3_UVADDR = (3 * LCD_WIDTH) + 1;
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START_X = 0;
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START_Y = 0;
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DELTA_X = 0x200; /* no scaling */
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DELTA_Y = 0x200; /* no scaling */
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#endif
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LCDC_INTR_MASK = INTR_MASK_LINE; /* INTR_MASK_EVENLINE; */
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}
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/* configure pins to drive lcd in 18bit mode */
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static void iomux_lcd(void)
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{
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unsigned long muxa;
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muxa = SCU_IOMUXA_CON & ~(IOMUX_LCD_VSYNC|IOMUX_LCD_DEN|0xff);
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muxa |= IOMUX_LCD_D18|IOMUX_LCD_D20|IOMUX_LCD_D22|IOMUX_LCD_D17|IOMUX_LCD_D16;
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SCU_IOMUXA_CON = muxa;
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SCU_IOMUXB_CON |= IOMUX_LCD_D815;
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}
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void lcd_init_device()
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{
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iomux_lcd(); /* setup pins for 16bit lcd interface */
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lcdctrl_init(); /* basic lcdc module configuration */
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lcdctrl_bypass(1); /* run in bypass mode - all writes goes directly to lcd controller */
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lcd_display_init();
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}
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/* This is ugly hack. We drive lcd in bypass mode
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* where all writes goes directly to lcd controller.
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* This is suboptimal at best. IF module povides
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* FIFO, internal sram buffer, hardware scaller,
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* DMA signals, hardware alpha blending and more.
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* BUT the fact is that I have no idea how to use
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* this modes. Datasheet floating around is very
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* unclean in this regard and OF uses ackward
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* lcd update routines which are hard to understand.
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* Moreover OF sets some bits in IF module registers
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* which are referred as reseved in datasheet.
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*/
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void lcd_update()
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{
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lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
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}
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