a4e7bc383e
* Implement lcd_flip() * Add support for multiple banks in NAND driver * Add basic I²C driver (untested) * Get audio back working * Add power driver * Other minor fixes and cleanups git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19863 a1c6a512-1295-4272-9138-f99709370657
137 lines
4.1 KiB
C
137 lines
4.1 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) 2008 by Maurus Cuelenaere
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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 "jz4740.h"
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#include "lcd.h"
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#include "lcd-target.h"
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#include "system.h"
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#include "kernel.h"
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#include "backlight-target.h"
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/*
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Warning: code behaviour is unpredictable when threads get switched in IRQ mode!
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So don't update the LCD in an interrupt handler!
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*/
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static volatile bool lcd_is_on = false;
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static struct mutex lcd_mtx;
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static struct wakeup lcd_wkup;
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/* LCD init */
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void lcd_init_device(void)
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{
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__cpm_start_lcd();
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lcd_init_controller();
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__cpm_stop_lcd();
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lcd_is_on = true;
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mutex_init(&lcd_mtx);
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wakeup_init(&lcd_wkup);
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system_enable_irq(DMA_IRQ(DMA_LCD_CHANNEL));
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}
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void lcd_enable(bool state)
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{
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if(state)
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{
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lcd_on();
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lcd_call_enable_hook();
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}
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else
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lcd_off();
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lcd_is_on = state;
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}
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bool lcd_enabled(void)
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{
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return lcd_is_on;
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}
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/* Update a fraction of the display. */
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void lcd_update_rect(int x, int y, int width, int height)
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{
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mutex_lock(&lcd_mtx);
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__cpm_start_lcd();
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lcd_set_target(x, y, width, height);
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dma_enable();
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) = DMAC_DCCSR_NDES;
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REG_DMAC_DSAR(DMA_LCD_CHANNEL) = PHYSADDR((unsigned long)&lcd_framebuffer[y][x]);
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REG_DMAC_DRSR(DMA_LCD_CHANNEL) = DMAC_DRSR_RS_SLCD; /* source = SLCD */
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REG_DMAC_DTAR(DMA_LCD_CHANNEL) = PHYSADDR(SLCD_FIFO);
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REG_DMAC_DTCR(DMA_LCD_CHANNEL) = width*height;
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REG_DMAC_DCMD(DMA_LCD_CHANNEL) = ( DMAC_DCMD_SAI | DMAC_DCMD_RDIL_IGN | DMAC_DCMD_SWDH_32
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| DMAC_DCMD_DWDH_16 | DMAC_DCMD_DS_16BIT );
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__dcache_writeback_all(); /* Size of framebuffer is way bigger than cache size.
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We need to find a way to make the framebuffer uncached, so this statement can get removed. */
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while(REG_SLCD_STATE & SLCD_STATE_BUSY);
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REG_SLCD_CTRL |= SLCD_CTRL_DMA_EN; /* Enable SLCD DMA support */
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) |= DMAC_DCCSR_EN; /* Enable DMA channel */
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REG_DMAC_DCMD(DMA_LCD_CHANNEL) |= DMAC_DCMD_TIE; /* Enable DMA interrupt */
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wakeup_wait(&lcd_wkup, TIMEOUT_BLOCK); /* Sleeping in lcd_update() should be safe */
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_EN; /* Disable DMA channel */
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dma_disable();
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while(REG_SLCD_STATE & SLCD_STATE_BUSY);
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REG_SLCD_CTRL &= ~SLCD_CTRL_DMA_EN; /* Disable SLCD DMA support */
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__cpm_stop_lcd();
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mutex_unlock(&lcd_mtx);
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}
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void DMA_CALLBACK(DMA_LCD_CHANNEL)(void)
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{
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if (REG_DMAC_DCCSR(DMA_LCD_CHANNEL) & DMAC_DCCSR_HLT)
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_HLT;
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if (REG_DMAC_DCCSR(DMA_LCD_CHANNEL) & DMAC_DCCSR_AR)
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_AR;
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if (REG_DMAC_DCCSR(DMA_LCD_CHANNEL) & DMAC_DCCSR_CT)
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_CT;
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if (REG_DMAC_DCCSR(DMA_LCD_CHANNEL) & DMAC_DCCSR_TT)
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REG_DMAC_DCCSR(DMA_LCD_CHANNEL) &= ~DMAC_DCCSR_TT;
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wakeup_signal(&lcd_wkup);
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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)
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{
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if (!lcd_is_on || !backlight_enabled())
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return;
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lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
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}
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