8956f2b7f5
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19353 a1c6a512-1295-4272-9138-f99709370657
342 lines
10 KiB
C
342 lines
10 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) 2002 by Alan Korr
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* Copyright (C) 2008 François Dinel
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* Copyright (C) 2008 Rafaël Carré
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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 "hwcompat.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 "string.h"
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/*** AS3525 specifics ***/
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#include "as3525.h"
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/*** definitions ***/
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#define LCD_SET_LOWER_COLUMN_ADDRESS ((char)0x00)
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#define LCD_SET_HIGHER_COLUMN_ADDRESS ((char)0x10)
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#define LCD_SET_DISPLAY_START_LINE ((char)0x40)
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#define LCD_SET_CONTRAST_CONTROL_REGISTER ((char)0x81)
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#define LCD_SET_SEGMENT_REMAP ((char)0xA0)
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#define LCD_SET_SEGMENT_REMAP_INV ((char)0xA1)
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#define LCD_SET_ENTIRE_DISPLAY_OFF ((char)0xA4)
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#define LCD_SET_ENTIRE_DISPLAY_ON ((char)0xA5)
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#define LCD_SET_NORMAL_DISPLAY ((char)0xA6)
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#define LCD_SET_REVERSE_DISPLAY ((char)0xA7)
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#define LCD_SET_MULTIPLEX_RATIO ((char)0xA8)
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#define LCD_SET_DC_DC ((char)0xAD)
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#define LCD_SET_DC_DC_PART2 ((char)0x8A)
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#define LCD_SET_DISPLAY_OFF ((char)0xAE)
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#define LCD_SET_DISPLAY_ON ((char)0xAF)
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#define LCD_SET_PAGE_ADDRESS ((char)0xB0)
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#define LCD_SET_COM_OUTPUT_SCAN_DIRECTION ((char)0xC0)
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#define LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV ((char)0xC8)
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#define LCD_SET_DISPLAY_CLOCK_AND_OSC_FREQ ((char)0xD5)
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#define LCD_SET_VCOM_DESELECT_LEVEL ((char)0xDB)
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#define LCD_SET_PRECHARGE_PERIOD ((char)0xD9)
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#define LCD_NOP ((char)0xE3)
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/* LCD command codes */
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#define LCD_CNTL_CONTRAST 0x81 /* Contrast */
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#define LCD_CNTL_OUTSCAN 0xc8 /* Output scan direction */
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#define LCD_CNTL_SEGREMAP 0xa1 /* Segment remap */
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#define LCD_CNTL_DISPON 0xaf /* Display on */
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#define LCD_CNTL_PAGE 0xb0 /* Page address */
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#define LCD_CNTL_HIGHCOL 0x10 /* Upper column address */
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#define LCD_CNTL_LOWCOL 0x00 /* Lower column address */
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/* DBOP initialisation, do what OF does */
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static void ams3525_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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GPIOB_AFSEL = 0x08; /* DBOP on pin 3 */
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GPIOC_AFSEL = 0x0f; /* DBOP on pins 3:0 */
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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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}
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void lcd_write_command(int byte)
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{
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/* unset D/C# (data or command) */
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GPIOA_PIN(5) = 0;
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/* Write command */
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/* Only bits 15:12 and 3:0 of DBOP_DOUT are meaningful */
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DBOP_DOUT = (byte << 8) | byte;
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/* While push fifo is not empty */
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while ((DBOP_STAT & (1<<10)) == 0)
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;
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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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/* set D/C# (data or command) */
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GPIOA_PIN(5) = (1<<5);
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while (count--)
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{
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/* Write pixels */
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/* Only bits 15:12 and 3:0 of DBOP_DOUT are meaningful */
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DBOP_DOUT = (*p_bytes << 8) | *p_bytes;
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p_bytes++; /* next packed pixels */
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/* While push fifo is not empty */
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while ((DBOP_STAT & (1<<10)) == 0)
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;
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}
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}
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/** globals **/
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static int xoffset; /* needed for flip */
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static bool display_on; /* used by lcd_enable */
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/*** hardware configuration ***/
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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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lcd_write_command(LCD_CNTL_CONTRAST);
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lcd_write_command(val);
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}
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void lcd_set_invert_display(bool yesno)
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{
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if (yesno)
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lcd_write_command(LCD_SET_REVERSE_DISPLAY);
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else
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lcd_write_command(LCD_SET_NORMAL_DISPLAY);
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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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if (yesno)
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{
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lcd_write_command(LCD_SET_SEGMENT_REMAP);
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lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
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}
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else
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{
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lcd_write_command(LCD_SET_SEGMENT_REMAP_INV);
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lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV);
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}
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}
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void lcd_enable(bool enable)
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{
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if(display_on == enable)
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return;
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if( (display_on = enable) ) /* simple '=' is not a typo ! */
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lcd_write_command(LCD_SET_DISPLAY_ON);
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else
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lcd_write_command(LCD_SET_DISPLAY_OFF);
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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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/* LCD init, largely based on what OF does */
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void lcd_init_device(void)
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{
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int i;
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#define LCD_FULLSCREEN (128+4)
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fb_data p_bytes[LCD_FULLSCREEN]; /* framebuffer used to clear the screen */
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ams3525_dbop_init();
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GPIOA_DIR |= 0x33; /* pins 5:4 and 1:0 out */
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GPIOA_PIN(1) = (1<<1);
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GPIOA_PIN(0) = (1<<0);
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GPIOA_PIN(4) = 0;
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/* Set display clock (divide ratio = 1) and oscillator frequency (1) */
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lcd_write_command(LCD_SET_DISPLAY_CLOCK_AND_OSC_FREQ);
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lcd_write_command(0x10);
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/* Set VCOM deselect level to 0.76V */
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lcd_write_command(LCD_SET_VCOM_DESELECT_LEVEL);
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lcd_write_command(0x34);
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/* Set pre-charge period (p1period is 2 dclk and p2period is 5 dclk) */
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lcd_write_command(LCD_SET_PRECHARGE_PERIOD);
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lcd_write_command(0x25);
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/* Set contrast register to 12% */
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lcd_set_contrast(lcd_default_contrast());
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/* Disable DC-DC */
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lcd_write_command(LCD_SET_DC_DC);
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lcd_write_command(LCD_SET_DC_DC_PART2/*|0*/);
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/* Set starting line as 0 */
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lcd_write_command(LCD_SET_DISPLAY_START_LINE /*|(0 & 0x3f)*/);
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/* Column 131 is remapped to SEG0 */
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lcd_write_command(LCD_SET_SEGMENT_REMAP_INV);
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/* Invert COM scan direction (N-1 to 0) */
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lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV);
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/* Set normal display mode (not every pixel ON) */
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lcd_write_command(LCD_SET_ENTIRE_DISPLAY_OFF);
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/* Set normal display mode (not inverted) */
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lcd_write_command(LCD_SET_NORMAL_DISPLAY);
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/* Clear whole framebuffer, including "overscan"
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* We don't need to handle that out of screen columns in lcd_clear_display()
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* since we will never write into it anymore
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*/
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lcd_write_command (LCD_SET_HIGHER_COLUMN_ADDRESS /*| 0*/);
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lcd_write_command (LCD_SET_LOWER_COLUMN_ADDRESS /*| 0*/);
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memset(p_bytes, 0, sizeof(p_bytes)); /* fills with 0 : pixel off */
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for(i = 0; i < 8; i++)
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{
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lcd_write_command (LCD_SET_PAGE_ADDRESS | (i /*& 0xf*/));
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lcd_write_data(p_bytes, LCD_FULLSCREEN /* overscan */);
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}
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lcd_enable(true);
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lcd_update();
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}
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/*** Update functions ***/
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/* Performance function that works with an external buffer
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note that by and bheight are in 8-pixel units! */
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void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
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int bheight, int stride)
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{
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if(!display_on)
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return;
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/* Copy display bitmap to hardware */
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while (bheight--)
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{
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lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
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lcd_write_command (LCD_CNTL_HIGHCOL | (((x+2+xoffset)>>4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | ((x+2+xoffset) & 0xf));
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lcd_write_data(data, width);
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data += stride;
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}
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}
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/* Helper function for lcd_grey_phase_blit(). */
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void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
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/* Performance function that works with an external buffer
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note that by and bheight are in 8-pixel units! */
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void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
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int x, int by, int width, int bheight, int stride)
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{
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if(!display_on)
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return;
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stride <<= 3; /* 8 pixels per block */
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/* Copy display bitmap to hardware */
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while (bheight--)
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{
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lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
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lcd_write_command (LCD_CNTL_HIGHCOL | (((x+2+xoffset)>>4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | ((x+2+xoffset) & 0xf));
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lcd_grey_data(values, phases, width);
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values += stride;
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phases += stride;
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}
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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) ICODE_ATTR;
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void lcd_update(void)
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{
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int y;
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if(!display_on)
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return;
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/* Copy display bitmap to hardware */
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for (y = 0; y < LCD_FBHEIGHT; y++)
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{
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lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
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lcd_write_command (LCD_CNTL_HIGHCOL | (((xoffset+2) >> 4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | ((xoffset+2) & 0xf));
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lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
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}
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}
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/* Update a fraction of the display. */
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void lcd_update_rect(int, int, int, int) ICODE_ATTR;
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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 ymax;
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if(!display_on)
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return;
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/* The Y coordinates have to work on even 8 pixel rows */
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ymax = (y + height-1) >> 3;
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y >>= 3;
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if(x + width > LCD_WIDTH)
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width = LCD_WIDTH - x;
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if (width <= 0)
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return; /* nothing left to do, 0 is harmful to lcd_write_data() */
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if(ymax >= LCD_FBHEIGHT)
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ymax = LCD_FBHEIGHT-1;
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/* Copy specified rectange bitmap to hardware */
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for (; y <= ymax; y++)
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{
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lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
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lcd_write_command (LCD_CNTL_HIGHCOL | (((x+2+xoffset) >> 4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | ((x+2+xoffset) & 0xf));
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lcd_write_data (&lcd_framebuffer[y][x], width);
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}
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}
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