| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id:$ |
| * |
| * Copyright (C) 2010 Marcin Bukat |
| * |
| * 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 "system.h" |
| #include "kernel.h" |
| #include "lcd.h" |
| |
| /*** definitions ***/ |
| /* TOMATO LSI 0350 - definitions and slightly tweaked functions |
| * taken from lcd-remote-iaudio.c |
| */ |
| |
| #define LCD_SET_DUTY_RATIO 0x48 |
| #define LCD_SELECT_ADC 0xa0 |
| #define LCD_SELECT_SHL 0xc0 |
| #define LCD_SET_COM0 0x44 |
| #define LCD_OSC_ON 0xab |
| #define LCD_SELECT_DCDC 0x64 |
| #define LCD_SELECT_RES 0x20 |
| #define LCD_SET_VOLUME 0x81 |
| #define LCD_SET_BIAS 0x50 |
| #define LCD_CONTROL_POWER 0x28 |
| #define LCD_DISPLAY_ON 0xae |
| #define LCD_SET_INITLINE 0x40 |
| #define LCD_SET_COLUMN 0x10 |
| #define LCD_SET_PAGE 0xb0 |
| #define LCD_SET_GRAY 0x88 |
| #define LCD_SET_PWM_FRC 0x90 |
| #define LCD_SET_POWER_SAVE 0xa8 |
| #define LCD_REVERSE 0xa6 |
| #define LCD_RESET 0xe2 |
| |
| /* cached settings */ |
| static bool cached_invert = false; |
| static bool cached_flip = false; |
| static int cached_contrast = DEFAULT_CONTRAST_SETTING; |
| |
| /*** hardware configuration ***/ |
| int lcd_default_contrast(void) |
| { |
| return DEFAULT_CONTRAST_SETTING; |
| } |
| |
| void lcd_powersave(bool on) |
| { |
| if (on) |
| /* enter power saving mode |
| * this turns off lcd without controller reset |
| * probably ~1mA saving |
| */ |
| lcd_write_command(LCD_SET_POWER_SAVE | 1); |
| else |
| /* leave lcd power saving mode |
| * no need to reset and initialize controller |
| */ |
| lcd_write_command(LCD_SET_POWER_SAVE | 0); |
| } |
| |
| void lcd_set_contrast(int val) |
| { |
| if (val < MIN_CONTRAST_SETTING) |
| val = MIN_CONTRAST_SETTING; |
| else if (val > MAX_CONTRAST_SETTING) |
| val = MAX_CONTRAST_SETTING; |
| |
| cached_contrast = val; |
| lcd_write_command_e(LCD_SET_VOLUME, val); |
| } |
| |
| void lcd_set_invert_display(bool yesno) |
| { |
| cached_invert = yesno; |
| lcd_write_command(LCD_REVERSE | yesno); |
| |
| } |
| |
| /* turn the display upside down (call lcd_update() afterwards) */ |
| void lcd_set_flip(bool yesno) |
| { |
| cached_flip = yesno; |
| if(yesno) |
| { |
| lcd_write_command(LCD_SELECT_ADC | 1); |
| lcd_write_command(LCD_SELECT_SHL | 0); |
| lcd_write_command_e(LCD_SET_COM0, 0); |
| } |
| else |
| { |
| lcd_write_command(LCD_SELECT_ADC | 0); |
| lcd_write_command(LCD_SELECT_SHL | 8); |
| lcd_write_command_e(LCD_SET_COM0, 0); |
| } |
| } |
| |
| void lcd_shutdown(void) |
| { |
| /* Set power save -> Power OFF (VDD - VSS) .. that's it */ |
| lcd_write_command(LCD_SET_POWER_SAVE | 1); |
| } |
| |
| void lcd_init_device(void) |
| { |
| and_l(~0x00000800, &GPIO_FUNCTION); /* CS3 line */ |
| |
| /* LCD Reset GPO34 */ |
| or_l(0x00000004, &GPIO1_ENABLE); /* set as output */ |
| or_l(0x00000004, &GPIO1_FUNCTION); /* switch to secondary function - GPIO */ |
| |
| and_l(~0x00000004, &GPIO1_OUT); /* RESET low */ |
| sleep(1); /* delay at least 1000 ns */ |
| or_l(0x00000004, &GPIO1_OUT); /* RESET high */ |
| sleep(1); |
| |
| /* parameters setup taken from original firmware */ |
| lcd_write_command(LCD_RESET); |
| lcd_write_command_e(LCD_SET_DUTY_RATIO,0x80); /* 1/128 */ |
| lcd_write_command(LCD_OSC_ON); |
| lcd_write_command(LCD_SELECT_DCDC | 3); /* DC/DC 6xboost */ |
| lcd_write_command(LCD_SELECT_RES | 7); /* Regulator resistor: 7.2 */ |
| lcd_write_command(LCD_SET_BIAS | 6); /* 1/11 */ |
| lcd_write_command(LCD_SET_PWM_FRC | 6); /* 3FRC + 12PWM */ |
| lcd_write_command_e(LCD_SET_GRAY | 0, 0x00); |
| lcd_write_command_e(LCD_SET_GRAY | 1, 0x00); |
| lcd_write_command_e(LCD_SET_GRAY | 2, 0x0c); |
| lcd_write_command_e(LCD_SET_GRAY | 3, 0x00); |
| lcd_write_command_e(LCD_SET_GRAY | 4, 0xc4); |
| lcd_write_command_e(LCD_SET_GRAY | 5, 0x00); |
| lcd_write_command_e(LCD_SET_GRAY | 6, 0xcc); |
| lcd_write_command_e(LCD_SET_GRAY | 7, 0x00); |
| |
| lcd_write_command(LCD_CONTROL_POWER | 7); /* All circuits ON */ |
| lcd_write_command(LCD_DISPLAY_ON | 1); /* display on */ |
| |
| lcd_set_flip(cached_flip); |
| lcd_set_contrast(cached_contrast); |
| lcd_set_invert_display(cached_invert); |
| |
| lcd_update(); |
| } |
| |
| /* 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; |
| |
| for(y = 0;y < LCD_FBHEIGHT;y++) |
| { |
| lcd_write_command(LCD_SET_PAGE | y); |
| lcd_write_command_e(LCD_SET_COLUMN, 0); |
| lcd_write_data(lcd_framebuffer[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; |
| |
| /* Copy specified rectange bitmap to hardware */ |
| for (; y <= ymax; y++) |
| { |
| lcd_write_command(LCD_SET_PAGE | y ); |
| lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0x0f); |
| lcd_write_data (&lcd_framebuffer[y][x], width); |
| } |
| |
| } |
| |
| /* Helper function. */ |
| void lcd_mono_data(const unsigned char *data, int count); |
| |
| /* 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) |
| { |
| while (bheight--) |
| { |
| lcd_write_command(LCD_SET_PAGE | (by & 0xf)); |
| lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0xf); |
| |
| lcd_mono_data(data, width); |
| data += stride; |
| by++; |
| } |
| } |
| |
| /* 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_SET_PAGE | (by & 0xf)); |
| lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0xf); |
| |
| lcd_grey_data(values, phases, width); |
| values += stride; |
| phases += stride; |
| by++; |
| } |
| } |
| |