318 lines
9.0 KiB
C
318 lines
9.0 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) 2010 Marcin Bukat
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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 "system.h"
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#include "kernel.h"
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#include "lcd.h"
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/*** definitions ***/
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/* TOMATO LSI 0350 - definitions and slightly tweaked functions
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* taken from lcd-remote-iaudio.c
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*/
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#define LCD_SET_DUTY_RATIO 0x48
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#define LCD_SELECT_ADC 0xa0
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#define LCD_SELECT_SHL 0xc0
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#define LCD_SET_COM0 0x44
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#define LCD_OSC_ON 0xab
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#define LCD_SELECT_DCDC 0x64
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#define LCD_SELECT_RES 0x20
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#define LCD_SET_VOLUME 0x81
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#define LCD_SET_BIAS 0x50
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#define LCD_CONTROL_POWER 0x28
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#define LCD_DISPLAY_ON 0xae
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#define LCD_SET_INITLINE 0x40
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#define LCD_SET_COLUMN 0x10
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#define LCD_SET_PAGE 0xb0
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#define LCD_SET_GRAY 0x88
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#define LCD_SET_PWM_FRC 0x90
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#define LCD_SET_POWER_SAVE 0xa8
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#define LCD_REVERSE 0xa6
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#define LCD_RESET 0xe2
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/* cached settings */
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static bool cached_invert = false;
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static bool cached_flip = false;
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static int cached_contrast = DEFAULT_CONTRAST_SETTING;
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static struct mutex lcd_mtx; /* The update functions use DMA and yield */
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volatile unsigned char page IBSS_ATTR;
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unsigned char column IBSS_ATTR;
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unsigned int dma_len IBSS_ATTR;
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volatile unsigned long dma_count IBSS_ATTR;
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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_powersave(bool on)
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{
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if (on)
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/* enter power saving mode
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* this turns off lcd without controller reset
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* probably ~1mA saving
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*/
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lcd_write_command(LCD_SET_POWER_SAVE | 1);
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else
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/* leave lcd power saving mode
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* no need to reset and initialize controller
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*/
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lcd_write_command(LCD_SET_POWER_SAVE | 0);
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}
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void lcd_set_contrast(int val)
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{
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if (val < MIN_CONTRAST_SETTING)
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val = MIN_CONTRAST_SETTING;
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else if (val > MAX_CONTRAST_SETTING)
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val = MAX_CONTRAST_SETTING;
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cached_contrast = val;
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lcd_write_command_e(LCD_SET_VOLUME, val);
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}
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void lcd_set_invert_display(bool yesno)
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{
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cached_invert = yesno;
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lcd_write_command(LCD_REVERSE | yesno);
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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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cached_flip = yesno;
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if(yesno)
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{
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lcd_write_command(LCD_SELECT_ADC | 1);
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lcd_write_command(LCD_SELECT_SHL | 0);
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lcd_write_command_e(LCD_SET_COM0, 0);
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}
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else
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{
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lcd_write_command(LCD_SELECT_ADC | 0);
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lcd_write_command(LCD_SELECT_SHL | 8);
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lcd_write_command_e(LCD_SET_COM0, 0);
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}
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}
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void lcd_shutdown(void)
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{
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/* Set power save -> Power OFF (VDD - VSS) .. that's it */
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lcd_write_command(LCD_SET_POWER_SAVE | 1);
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}
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void lcd_init_device(void)
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{
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and_l(~0x00000800, &GPIO_FUNCTION); /* CS3 line */
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/* LCD Reset GPO34 */
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or_l(0x00000004, &GPIO1_ENABLE); /* set as output */
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or_l(0x00000004, &GPIO1_FUNCTION); /* switch to secondary function - GPIO */
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and_l(~0x00000004, &GPIO1_OUT); /* RESET low */
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sleep(1); /* delay at least 1000 ns */
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or_l(0x00000004, &GPIO1_OUT); /* RESET high */
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sleep(1);
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/* parameters setup taken from original firmware */
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lcd_write_command(LCD_RESET);
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lcd_write_command_e(LCD_SET_DUTY_RATIO,0x80); /* 1/128 */
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lcd_write_command(LCD_OSC_ON);
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lcd_write_command(LCD_SELECT_DCDC | 3); /* DC/DC 6xboost */
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lcd_write_command(LCD_SELECT_RES | 7); /* Regulator resistor: 7.2 */
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lcd_write_command(LCD_SET_BIAS | 6); /* 1/11 */
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lcd_write_command(LCD_SET_PWM_FRC | 6); /* 3FRC + 12PWM */
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lcd_write_command_e(LCD_SET_GRAY | 0, 0x00);
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lcd_write_command_e(LCD_SET_GRAY | 1, 0x00);
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lcd_write_command_e(LCD_SET_GRAY | 2, 0x0c);
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lcd_write_command_e(LCD_SET_GRAY | 3, 0x00);
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lcd_write_command_e(LCD_SET_GRAY | 4, 0xc4);
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lcd_write_command_e(LCD_SET_GRAY | 5, 0x00);
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lcd_write_command_e(LCD_SET_GRAY | 6, 0xcc);
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lcd_write_command_e(LCD_SET_GRAY | 7, 0x00);
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lcd_write_command(LCD_CONTROL_POWER | 7); /* All circuits ON */
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lcd_write_command(LCD_DISPLAY_ON | 1); /* display on */
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lcd_set_flip(cached_flip);
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lcd_set_contrast(cached_contrast);
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lcd_set_invert_display(cached_invert);
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/* Configure DMA3 */
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DAR3 = 0xf0000002;
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DSR3 = 1;
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DIVR3 = 57; /* DMA3 is mapped into vector 57 in system.c */
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ICR9 = (6 << 2); /* Enable DMA3 interrupt at level 6, priority 0 */
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and_l(~(1<<17), &IMR);
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mutex_init(&lcd_mtx);
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lcd_update();
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}
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/* LCD DMA ISR */
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void DMA3(void) __attribute__ ((interrupt_handler, section(".icode")));
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void DMA3(void)
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{
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DSR3 = 1;
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if (--dma_count > 0)
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{
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/* Setup write address in lcd controller ram*/
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lcd_write_command(LCD_SET_PAGE | ++page);
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lcd_write_command_e(LCD_SET_COLUMN | ((column >> 4) & 0xf),
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column & 0x0f);
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SAR3 = (unsigned long)&lcd_framebuffer[page][column];
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BCR3 = dma_len;
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DCR3 = DMA_INT | DMA_AA | DMA_BWC(1)
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| DMA_SINC | DMA_SSIZE(DMA_SIZE_LINE)
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| DMA_DSIZE(DMA_SIZE_BYTE) | DMA_START;
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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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mutex_lock(&lcd_mtx);
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/* Setup initial address in lcd controller */
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lcd_write_command(LCD_SET_PAGE | 0);
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lcd_write_command_e(LCD_SET_COLUMN, 0);
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/* Initial lcd ram address */
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page = 0;
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column = 0;
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/* Number of pages to address */
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dma_count = LCD_FBHEIGHT;
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/* Transfer size in bytes to the given page */
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dma_len = LCD_WIDTH*2;
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/* Initialize DMA transfer */
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SAR3 = (unsigned long)lcd_framebuffer;
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BCR3 = LCD_WIDTH*2;
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DCR3 = DMA_INT | DMA_AA | DMA_BWC(1)
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| DMA_SINC | DMA_SSIZE(DMA_SIZE_LINE)
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| DMA_DSIZE(DMA_SIZE_BYTE) | DMA_START;
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while (dma_count > 0)
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yield();
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mutex_unlock(&lcd_mtx);
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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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mutex_lock(&lcd_mtx);
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if (ymax >= LCD_FBHEIGHT)
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ymax = LCD_FBHEIGHT-1;
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/* Initial lcd ram address*/
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lcd_write_command(LCD_SET_PAGE | y );
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lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0x0f);
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page = y;
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column = x;
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dma_len = width*2;
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dma_count = ymax - y + 1;
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/* Initialize DMA transfer */
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SAR3 = (unsigned long)&lcd_framebuffer[page][column];
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BCR3 = dma_len;
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DCR3 = DMA_INT | DMA_AA | DMA_BWC(1)
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| DMA_SINC | DMA_SSIZE(DMA_SIZE_LINE)
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| DMA_DSIZE(DMA_SIZE_BYTE) | DMA_START;
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while (dma_count > 0)
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yield();
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mutex_unlock(&lcd_mtx);
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}
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/* Helper function. */
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void lcd_mono_data(const unsigned char *data, 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_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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while (bheight--)
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{
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lcd_write_command(LCD_SET_PAGE | (by & 0xf));
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lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 0xf);
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lcd_mono_data(data, width);
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data += stride;
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by++;
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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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stride <<= 3; /* 8 pixels per block */
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while (bheight--)
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{
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lcd_write_command(LCD_SET_PAGE | (by & 0xf));
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lcd_write_command_e(LCD_SET_COLUMN | ((x >> 4) & 0xf), x & 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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by++;
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}
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}
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