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78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: drivers/dd/sound/dsp.c
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* PURPOSE: Digital Signal Processing ?
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* PROGRAMMER: Snatched from ?
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*
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* UPDATE HISTORY:
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* ??/??/??: Created
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* 10/23/02: Steven Edwards (Steven_Ed4153@yahoo.com)
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* Minor build fix
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*/
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#include "sb16.h"
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#include "dsp.h"
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/************************************
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* unsigned char read_dsp(void)
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*
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* Reads the DSP chip
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* Arguments: none
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* Returns: Byte read
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************************************/
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unsigned char read_dsp(unsigned short base)
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{
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// while((inb(base+0x0e)&0x80)==0); //Wait until there is something to read
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// return inb(base+0x0a);
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return 0;
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}
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/************************************'
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* sb_status detect_dsp(void);
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*
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* Detects if a SB16 is installed
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* Arguments: None
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* Returns: Success or failure
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************************************/
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sb_status detect_dsp(SB16* sb16)
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{
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for(base=0x200;base<0x280;base+=0x10) //Tries to reset all DSP addresses there is
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if(reset_dsp(base)==SB_TRUE)
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{
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sb16->base=base;
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return SB_TRUE;
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}
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return SB_FALSE;
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}
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/**************************************
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* sb_status reset_dsp(unsigned short base_address);
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*
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* Tries to reset a DSP chip
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* Arguments: base address
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* Returns: Success of failure
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**************************************/
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sb_status reset_dsp(unsigned short base_address)
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{
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// int delay;
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// outb(base_address+DSP_RESET_PORT,1);
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// for(delay=0;delay<0xffff;delay++);
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// outb(base_address+DSP_RESET_PORT,0);
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// for(delay=0;delay<0xffff;delay++);
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// if((inb(base_address+DSP_READ_STATUS_PORT)&0x80)==0) return SB_FALSE;
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// if(inb(base_address+DSP_READ_DATA_PORT)!=0xAA) return SB_FALSE;
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return SB_TRUE;
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}
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void write_dsp(unsigned short base,unsigned char data)
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{
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// while ((inb(base+DSP_WRITE_PORT) & 0x80) != 0);
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// outb(base+DSP_WRITE_PORT, data);
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}
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