b37e6bc8c1
Change all lcd drivers to using a pointer to the static framebuffer instead of directly accessing the static array. This will let us later do fun things like dynamic framebuffer sizes (RaaA) or ability to use different buffers for different layers (dynamic skin backdrops!) Change-Id: I0a4d58a9d7b55e6c932131b929e5d4c9f9414b06
317 lines
9 KiB
C
317 lines
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) 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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coldfire_imr_mod(0, 1 << 17);
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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)FBADDR(column,page);
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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)FBADDR(column,page);
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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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