ReactOS Development > Doxygen

00001 /*
00002  * COPYRIGHT:        See COPYING in the top level directory
00003  * PROJECT:          ReactOS kernel
00004  * FILE:             drivers/dd/sound/mixer.c
00005  * PURPOSE:          Wave Mixer?
00006  * PROGRAMMER:       ?
00007  *
00008  * UPDATE HISTORY:
00009  *              ??/??/??: Created
00010  *      10/23/02: Steven Edwards (Steven_Ed4153@yahoo.com)
00011  *            Minor build fixes
00012  */
00013 
00014 #include "sb16.h"
00015 #include "dsp.h"
00016 #include "mixer.h"
00017 
00018 unsigned char read_mixer(unsigned short base,unsigned char reg)
00019 {
00020 
00021 //  outb(base+0x04,reg);
00022 //  return inb(base+0x05);
00023     return 0;
00024 }
00025 
00026 unsigned char get_irq(SB16* sb16)
00027 {
00028     unsigned char irq;
00029     irq=(read_mixer(sb16->base,MIXER_INTERRUPT_SETUP_REGISTER)&0x0f);
00030 
00031     if(irq==1) sb16->irq=2;
00032     if(irq==2) sb16->irq=5;
00033     if(irq==4) sb16->irq=7;
00034     if(irq==8) sb16->irq=10;
00035     return 0;
00036 }
00037 
00038 void get_dma(SB16* sb16)
00039 {
00040     unsigned char hi,lo,result=read_mixer(sb16->base,MIXER_DMA_SETUP_REGISTER);
00041   hi=result&0xE0;
00042   lo=result&0x0B;
00043   if(hi==0x80) sb16->dma16=7;
00044   if(hi==0x40) sb16->dma16=6;
00045   if(hi==0x20) sb16->dma16=5;
00046 
00047   if(lo==0x08) sb16->dma8=3;
00048   if(lo==0x02) sb16->dma8=1;
00049   if(lo==0x01) sb16->dma8=0;
00050 }
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