222 lines
6 KiB
C
222 lines
6 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 <sys/types.h> /* off_t */
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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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/*
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Warning: code behaviour is unpredictable when switch_thread() gets called 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 semaphore lcd_wkup;
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static int lcd_count = 0;
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void lcd_clock_enable(void)
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{
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if(++lcd_count == 1)
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__cpm_start_lcd();
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}
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void lcd_clock_disable(void)
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{
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if(--lcd_count == 0)
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__cpm_stop_lcd();
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}
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/* LCD init */
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void lcd_init_device(void)
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{
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lcd_init_controller();
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lcd_is_on = true;
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mutex_init(&lcd_mtx);
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semaphore_init(&lcd_wkup, 1, 0);
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system_enable_irq(DMA_IRQ(DMA_LCD_CHANNEL));
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}
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#ifdef HAVE_LCD_ENABLE
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void lcd_enable(bool state)
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{
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if(lcd_is_on == state)
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return;
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if(state)
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{
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lcd_on();
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send_event(LCD_EVENT_ACTIVATION, NULL);
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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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#endif
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bool lcd_active(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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/* Currently only do updates with full LCD width.
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* DMA can't handle full partial updates and CPU is too slow compared
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* to DMA updates */
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x = 0;
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width = LCD_WIDTH;
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mutex_lock(&lcd_mtx);
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lcd_clock_enable();
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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)FBADDR(x,y));
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REG_DMAC_DRSR(DMA_LCD_CHANNEL) = DMAC_DRSR_RS_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) >> 3;
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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_16BYTE );
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// XXX range
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commit_discard_dcache(); /* 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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semaphore_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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lcd_clock_disable();
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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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semaphore_release(&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)
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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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/* (Mis)use LCD framebuffer as a temporary buffer */
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void lcd_blit_yuv(unsigned char * const src[3],
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int src_x, int src_y, int stride,
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int x, int y, int width, int height)
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{
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unsigned char const * yuv_src[3];
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register off_t z;
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if(!lcd_is_on)
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return;
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z = stride * src_y;
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yuv_src[0] = src[0] + z + src_x;
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yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
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yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
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commit_discard_dcache(); // XXX range
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__cpm_start_ipu();
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IPU_STOP_IPU();
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IPU_RESET_IPU();
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IPU_CLEAR_END_FLAG();
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IPU_DISABLE_RSIZE();
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IPU_DISABLE_IRQ();
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IPU_SET_INFMT(INFMT_YUV420);
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IPU_SET_OUTFMT(OUTFMT_RGB565);
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IPU_SET_IN_FM(width, height);
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IPU_SET_Y_STRIDE(stride);
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IPU_SET_UV_STRIDE(stride, stride);
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IPU_SET_Y_ADDR(PHYSADDR((unsigned long)yuv_src[0]));
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IPU_SET_U_ADDR(PHYSADDR((unsigned long)yuv_src[1]));
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IPU_SET_V_ADDR(PHYSADDR((unsigned long)yuv_src[2]));
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IPU_SET_OUT_ADDR(PHYSADDR((unsigned long)FBADDR(y,x)));
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IPU_SET_OUT_FM(height, width);
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IPU_SET_OUT_STRIDE(height);
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IPU_SET_CSC_C0_COEF(YUV_CSC_C0);
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IPU_SET_CSC_C1_COEF(YUV_CSC_C1);
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IPU_SET_CSC_C2_COEF(YUV_CSC_C2);
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IPU_SET_CSC_C3_COEF(YUV_CSC_C3);
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IPU_SET_CSC_C4_COEF(YUV_CSC_C4);
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IPU_RUN_IPU();
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while(!(IPU_POLLING_END_FLAG()) && IPU_IS_ENABLED());
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IPU_CLEAR_END_FLAG();
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IPU_STOP_IPU();
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IPU_RESET_IPU();
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__cpm_stop_ipu();
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/* YUV speed is limited by LCD speed */
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lcd_update_rect(y, x, height, width);
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}
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