1 /* 2 * COPYRIGHT: See COPYING in the top level directory 3 * PROJECT: ReactOS kernel 4 * FILE: drivers/dd/sound/mixer.c 5 * PURPOSE: Wave Mixer? 6 * PROGRAMMER: ? 7 * 8 * UPDATE HISTORY: 9 * ??/??/??: Created 10 * 10/23/02: Steven Edwards (Steven_Ed4153@yahoo.com) 11 * Minor build fixes 12 */ 13 14 #include "sb16.h" 15 #include "dsp.h" 16 #include "mixer.h" 17 read_mixer(unsigned short base,unsigned char reg)18unsigned char read_mixer(unsigned short base,unsigned char reg) 19 { 20 21 // outb(base+0x04,reg); 22 // return inb(base+0x05); 23 return 0; 24 } 25 get_irq(SB16 * sb16)26unsigned char get_irq(SB16* sb16) 27 { 28 unsigned char irq; 29 irq=(read_mixer(sb16->base,MIXER_INTERRUPT_SETUP_REGISTER)&0x0f); 30 31 if(irq==1) sb16->irq=2; 32 if(irq==2) sb16->irq=5; 33 if(irq==4) sb16->irq=7; 34 if(irq==8) sb16->irq=10; 35 return 0; 36 } 37 get_dma(SB16 * sb16)38void get_dma(SB16* sb16) 39 { 40 unsigned char hi,lo,result=read_mixer(sb16->base,MIXER_DMA_SETUP_REGISTER); 41 hi=result&0xE0; 42 lo=result&0x0B; 43 if(hi==0x80) sb16->dma16=7; 44 if(hi==0x40) sb16->dma16=6; 45 if(hi==0x20) sb16->dma16=5; 46 47 if(lo==0x08) sb16->dma8=3; 48 if(lo==0x02) sb16->dma8=1; 49 if(lo==0x01) sb16->dma8=0; 50 } 51