| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2002 by Alan Korr |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #include "config.h" |
| |
| #include "hwcompat.h" |
| #include "kernel.h" |
| #include "lcd.h" |
| #include "system.h" |
| |
| /*** definitions ***/ |
| |
| #define LCD_SET_LOWER_COLUMN_ADDRESS ((char)0x00) |
| #define LCD_SET_HIGHER_COLUMN_ADDRESS ((char)0x10) |
| #define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20) |
| #define LCD_SET_POWER_CONTROL_REGISTER ((char)0x28) |
| #define LCD_SET_DISPLAY_START_LINE ((char)0x40) |
| #define LCD_SET_CONTRAST_CONTROL_REGISTER ((char)0x81) |
| #define LCD_SET_SEGMENT_REMAP ((char)0xA0) |
| #define LCD_SET_LCD_BIAS ((char)0xA2) |
| #define LCD_SET_ENTIRE_DISPLAY_OFF ((char)0xA4) |
| #define LCD_SET_ENTIRE_DISPLAY_ON ((char)0xA5) |
| #define LCD_SET_NORMAL_DISPLAY ((char)0xA6) |
| #define LCD_SET_REVERSE_DISPLAY ((char)0xA7) |
| #define LCD_SET_MULTIPLEX_RATIO ((char)0xA8) |
| #define LCD_SET_BIAS_TC_OSC ((char)0xA9) |
| #define LCD_SET_1OVER4_BIAS_RATIO ((char)0xAA) |
| #define LCD_SET_INDICATOR_OFF ((char)0xAC) |
| #define LCD_SET_INDICATOR_ON ((char)0xAD) |
| #define LCD_SET_DISPLAY_OFF ((char)0xAE) |
| #define LCD_SET_DISPLAY_ON ((char)0xAF) |
| #define LCD_SET_PAGE_ADDRESS ((char)0xB0) |
| #define LCD_SET_COM_OUTPUT_SCAN_DIRECTION ((char)0xC0) |
| #define LCD_SET_TOTAL_FRAME_PHASES ((char)0xD2) |
| #define LCD_SET_DISPLAY_OFFSET ((char)0xD3) |
| #define LCD_SET_READ_MODIFY_WRITE_MODE ((char)0xE0) |
| #define LCD_SOFTWARE_RESET ((char)0xE2) |
| #define LCD_NOP ((char)0xE3) |
| #define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE ((char)0xEE) |
| |
| /* LCD command codes */ |
| #define LCD_CNTL_RESET 0xe2 /* Software reset */ |
| #define LCD_CNTL_POWER 0x2f /* Power control */ |
| #define LCD_CNTL_CONTRAST 0x81 /* Contrast */ |
| #define LCD_CNTL_OUTSCAN 0xc8 /* Output scan direction */ |
| #define LCD_CNTL_SEGREMAP 0xa1 /* Segment remap */ |
| #define LCD_CNTL_DISPON 0xaf /* Display on */ |
| |
| #define LCD_CNTL_PAGE 0xb0 /* Page address */ |
| #define LCD_CNTL_HIGHCOL 0x10 /* Upper column address */ |
| #define LCD_CNTL_LOWCOL 0x00 /* Lower column address */ |
| |
| /** globals **/ |
| |
| static int xoffset; /* needed for flip */ |
| |
| /*** hardware configuration ***/ |
| |
| int lcd_default_contrast(void) |
| { |
| return (HW_MASK & LCD_CONTRAST_BIAS) ? 31 : 49; |
| } |
| |
| void lcd_set_contrast(int val) |
| { |
| lcd_write_command(LCD_CNTL_CONTRAST); |
| lcd_write_command(val); |
| } |
| |
| void lcd_set_invert_display(bool yesno) |
| { |
| if (yesno) |
| lcd_write_command(LCD_SET_REVERSE_DISPLAY); |
| else |
| lcd_write_command(LCD_SET_NORMAL_DISPLAY); |
| } |
| |
| /* turn the display upside down (call lcd_update() afterwards) */ |
| void lcd_set_flip(bool yesno) |
| { |
| #ifdef HAVE_DISPLAY_FLIPPED |
| if (!yesno) |
| #else |
| if (yesno) |
| #endif |
| { |
| lcd_write_command(LCD_SET_SEGMENT_REMAP); |
| lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION); |
| xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 112 we have */ |
| } |
| else |
| { |
| lcd_write_command(LCD_SET_SEGMENT_REMAP | 0x01); |
| lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08); |
| xoffset = 0; |
| } |
| } |
| |
| void lcd_init_device(void) |
| { |
| /* Initialize PB0-3 as output pins */ |
| PBCR2 &= 0xff00; /* MD = 00 */ |
| PBIOR |= 0x000f; /* IOR = 1 */ |
| |
| /* inits like the original firmware */ |
| lcd_write_command(LCD_SOFTWARE_RESET); |
| lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO + 4); |
| lcd_write_command(LCD_SET_1OVER4_BIAS_RATIO + 0); /* force 1/4 bias: 0 */ |
| lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER + 7); |
| /* power control register: op-amp=1, regulator=1, booster=1 */ |
| lcd_write_command(LCD_SET_DISPLAY_ON); |
| lcd_write_command(LCD_SET_NORMAL_DISPLAY); |
| lcd_set_flip(false); |
| lcd_write_command(LCD_SET_DISPLAY_START_LINE + 0); |
| lcd_set_contrast(lcd_default_contrast()); |
| lcd_write_command(LCD_SET_PAGE_ADDRESS); |
| lcd_write_command(LCD_SET_LOWER_COLUMN_ADDRESS + 0); |
| lcd_write_command(LCD_SET_HIGHER_COLUMN_ADDRESS + 0); |
| |
| lcd_clear_display(); |
| lcd_update(); |
| } |
| |
| /*** Update functions ***/ |
| |
| /* Performance function that works with an external buffer |
| note that by and bheight are in 8-pixel units! */ |
| void lcd_blit_mono(const unsigned char *data, int x, int by, int width, |
| int bheight, int stride) |
| { |
| /* Copy display bitmap to hardware */ |
| while (bheight--) |
| { |
| lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf)); |
| lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf)); |
| lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf)); |
| |
| lcd_write_data(data, width); |
| data += stride; |
| } |
| } |
| |
| /* Helper function for lcd_grey_phase_blit(). */ |
| void lcd_grey_data(unsigned char *values, unsigned char *phases, int count); |
| |
| /* Performance function that works with an external buffer |
| note that by and bheight are in 8-pixel units! */ |
| void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases, |
| int x, int by, int width, int bheight, int stride) |
| { |
| stride <<= 3; /* 8 pixels per block */ |
| while (bheight--) |
| { |
| lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf)); |
| lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf)); |
| lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf)); |
| |
| lcd_grey_data(values, phases, width); |
| values += stride; |
| phases += stride; |
| } |
| } |
| |
| |
| /* Update the display. |
| This must be called after all other LCD functions that change the display. */ |
| void lcd_update(void) |
| { |
| int y; |
| |
| /* Copy display bitmap to hardware */ |
| for (y = 0; y < LCD_FBHEIGHT; y++) |
| { |
| lcd_write_command (LCD_CNTL_PAGE | (y & 0xf)); |
| lcd_write_command (LCD_CNTL_HIGHCOL | ((xoffset >> 4) & 0xf)); |
| lcd_write_command (LCD_CNTL_LOWCOL | (xoffset & 0xf)); |
| |
| lcd_write_data (lcd_framebuffer[y], LCD_WIDTH); |
| } |
| } |
| |
| /* Update a fraction of the display. */ |
| void lcd_update_rect(int x, int y, int width, int height) |
| { |
| int ymax; |
| |
| /* The Y coordinates have to work on even 8 pixel rows */ |
| ymax = (y + height-1) >> 3; |
| y >>= 3; |
| |
| if(x + width > LCD_WIDTH) |
| width = LCD_WIDTH - x; |
| if (width <= 0) |
| return; /* nothing left to do, 0 is harmful to lcd_write_data() */ |
| if(ymax >= LCD_FBHEIGHT) |
| ymax = LCD_FBHEIGHT-1; |
| |
| /* Copy specified rectange bitmap to hardware */ |
| for (; y <= ymax; y++) |
| { |
| lcd_write_command (LCD_CNTL_PAGE | (y & 0xf)); |
| lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset) >> 4) & 0xf)); |
| lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf)); |
| |
| lcd_write_data (&lcd_framebuffer[y][x], width); |
| } |
| } |