3ba2f6e5c7
They were never finished, never saw any release ever, and haven't compiled for the better part of a decade. Given their HW capabilities [1], they are not worth trying to fix. [1] 1-2MB RAM, ~256MB onboard flash, no expandability Change-Id: I7b2a5806d687114c22156bb0458d4a10a9734190
261 lines
7.9 KiB
C
261 lines
7.9 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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*
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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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/*** 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_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20)
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#define LCD_SET_POWER_CONTROL_REGISTER ((char)0x28)
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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_LCD_BIAS ((char)0xA2)
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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_BIAS_TC_OSC ((char)0xA9)
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#define LCD_SET_1OVER4_BIAS_RATIO ((char)0xAA)
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#define LCD_SET_INDICATOR_OFF ((char)0xAC)
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#define LCD_SET_INDICATOR_ON ((char)0xAD)
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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_TOTAL_FRAME_PHASES ((char)0xD2)
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#define LCD_SET_DISPLAY_OFFSET ((char)0xD3)
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#define LCD_SET_READ_MODIFY_WRITE_MODE ((char)0xE0)
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#define LCD_SOFTWARE_RESET ((char)0xE2)
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#define LCD_NOP ((char)0xE3)
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#define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE ((char)0xEE)
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/* LCD command codes */
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#define LCD_CNTL_RESET 0xe2 /* Software reset */
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#define LCD_CNTL_POWER 0x2f /* Power control */
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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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#if CONFIG_CPU == AS3525
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#include "as3525.h"
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#include "clock-target.h"
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void lcd_write_command(int byte)
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{
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DBOP_TIMPOL_23 = 0x6006E;
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DBOP_DOUT = 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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DBOP_TIMPOL_23 = 0x6E06F;
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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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/* Write pixels */
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DBOP_DOUT = *p_bytes++;
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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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/* delay a bit. value arbitrary */
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int i = 0;
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while(i < 15)
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i++;
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}
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}
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static inline 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 = 0x0f; /* DBOP on pin 3:0 */
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GPIOC_AFSEL = 0xff; /* DBOP on pins 7:0 */
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DBOP_CTRL = 0x50008;
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DBOP_TIMPOL_01 = 0xA167E167;
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DBOP_TIMPOL_23 = 0x6E06F; /* this value is used for data (pixels) write */
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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 delay;
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ams3525_dbop_init();
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GPIOB_DIR |= (1<<4);
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GPIOD_DIR |= (1<<1)|(1<<3);
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GPIOD_PIN(1) = (1<<1); /* backlight on */
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GPIOD_PIN(3) = (1<<3);
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delay = 10; while(delay--) ;
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GPIOB_PIN(4) = (1<<4);
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delay = 10; while(delay--) ;
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lcd_write_command(LCD_SET_LCD_BIAS);
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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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lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO|0x5);
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lcd_set_contrast(lcd_default_contrast());
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lcd_write_command(LCD_SET_REVERSE_DISPLAY);
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lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER|0x7);
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lcd_write_command(LCD_SET_DISPLAY_ON);
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lcd_write_command(LCD_SET_DISPLAY_START_LINE);
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lcd_write_command(LCD_SET_NORMAL_DISPLAY);
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}
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#endif
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/** globals **/
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static int xoffset; /* needed for flip */
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/*** hardware configuration ***/
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int lcd_default_contrast(void)
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{
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return 0x1f;
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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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(void)yesno;
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/* TODO */
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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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/* 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+xoffset)>>4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | ((x+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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/* 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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(void)values;
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(void)phases;
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(void)x;
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(void)by;
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(void)width;
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(void)bheight;
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(void)stride;
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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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/* 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 >> 4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | (xoffset & 0xf));
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lcd_write_data (FBADDR(0, 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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/* 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+xoffset) >> 4) & 0xf));
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lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
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lcd_write_data (FBADDR(x,y), width);
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}
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}
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