/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * 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" #include "cpu.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 */ #if CONFIG_CPU == AS3525 #include "as3525.h" #include "clock-target.h" void lcd_write_command(int byte) { DBOP_TIMPOL_23 = 0x6006E; DBOP_DOUT = byte; /* While push fifo is not empty */ while ((DBOP_STAT & (1<<10)) == 0) ; DBOP_TIMPOL_23 = 0x6E06F; } void lcd_write_data(const fb_data* p_bytes, int count) { while (count--) { /* Write pixels */ DBOP_DOUT = *p_bytes++; /* While push fifo is not empty */ while ((DBOP_STAT & (1<<10)) == 0) ; /* delay a bit. value arbitrary */ int i = 0; while(i < 15) i++; } } static inline void ams3525_dbop_init(void) { CGU_DBOP |= (1<<3) | CLK_DIV(AS3525_PCLK_FREQ, AS3525_DBOP_FREQ); GPIOB_AFSEL = 0x0f; /* DBOP on pin 3:0 */ GPIOC_AFSEL = 0xff; /* DBOP on pins 7:0 */ DBOP_CTRL = 0x50008; DBOP_TIMPOL_01 = 0xA167E167; DBOP_TIMPOL_23 = 0x6E06F; /* this value is used for data (pixels) write */ } /* LCD init, largely based on what OF does */ void lcd_init_device(void) { int delay; ams3525_dbop_init(); GPIOB_DIR |= (1<<4); GPIOD_DIR |= (1<<1)|(1<<3); GPIOD_PIN(1) = (1<<1); /* backlight on */ GPIOD_PIN(3) = (1<<3); delay = 10; while(delay--) ; GPIOB_PIN(4) = (1<<4); delay = 10; while(delay--) ; lcd_write_command(LCD_SET_LCD_BIAS); lcd_write_command(LCD_SET_SEGMENT_REMAP); lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION); lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO|0x5); lcd_set_contrast(lcd_default_contrast()); lcd_write_command(LCD_SET_REVERSE_DISPLAY); lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER|0x7); lcd_write_command(LCD_SET_DISPLAY_ON); lcd_write_command(LCD_SET_DISPLAY_START_LINE); lcd_write_command(LCD_SET_NORMAL_DISPLAY); } #endif /** globals **/ static int xoffset; /* needed for flip */ /*** hardware configuration ***/ int lcd_default_contrast(void) { return 0x1f; } 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) { (void)yesno; /* TODO */ } /*** 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; } } /* 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) { (void)values; (void)phases; (void)x; (void)by; (void)width; (void)bheight; (void)stride; } /* Update the display. This must be called after all other LCD functions that change the display. */ void lcd_update(void) ICODE_ATTR; void lcd_update(void) { int y; void* (*fbaddr)(int x, int y) = FB_CURRENTVP_BUFFER->get_address_fn; /* 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 (fbaddr(0,y), LCD_WIDTH); } } /* Update a fraction of the display. */ void lcd_update_rect(int, int, int, int) ICODE_ATTR; 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; void* (*fbaddr)(int x, int y) = FB_CURRENTVP_BUFFER->get_address_fn; /* 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 (fbaddr(x,y), width); } }