323 lines
8.4 KiB
C
323 lines
8.4 KiB
C
/****************************************************************************
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*
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* Digital Sound Interface Kit (DSIK)
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* Version 2.00
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*
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* by Carlos Hasan
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*
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* Filename: detect.c
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* Version: Revision 1.1
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*
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* Language: WATCOM C
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* Environment: IBM PC (DOS/4GW)
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*
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* Description: Soundcards autodetection routines.
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*
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* Revision History:
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* ----------------
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*
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* Revision 1.1 94/12/28 13:02:27 chv
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* New Windows Sound System detection routine.
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*
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* Revision 1.0 94/11/20 18:02:36 chv
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* Initial revision
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*
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****************************************************************************/
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#include <i86.h>
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#include <dos.h>
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#include <env.h>
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#include <stdio.h>
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#include <conio.h>
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#include <string.h>
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#include "audio.h"
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#define TRUE 1
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#define FALSE 0
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struct DPMIREGS {
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long edi,esi,ebp,reserved,ebx,edx,ecx,eax;
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short flags,es,ds,fs,gs,ip,cs,sp,ss;
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};
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/****************************************************************************
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*
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* Function: SBDetect
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* Parameters: SC - soundcard structure
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*
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* Returns: Returns true if a Sound Blaster card is present.
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*
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* Description: Autodetect soundcard device.
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*
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****************************************************************************/
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static int SBDetect(SoundCard *SC)
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{
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char *Blaster,*Ptr,Buffer[32];
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int Port,Irq,LowDma,HighDma,MidiPort,Type;
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/* The BLASTER environment variable parameter meaning:
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A specifies the base address (0x220)
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I specifies the IRQ (7)
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D specifies the low DMA channel (1)
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H specifies the high DMA channel (5)
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P specifies the MIDI base address (0x330)
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T specifies the version of the soundcard:
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1 : Sound Blaster 1.0/1.5
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2 : Sound Blaster Pro
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3 : Sound Blaster 2.0/2.5
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4 : Sound Blaster Pro 3/Pro 4.0
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5 : Sound Blaster Pro (Microchannel)
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6 : Sound Blaster 16
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*/
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if (!(Blaster = getenv("BLASTER")))
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return FALSE;
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Port = 0x220;
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Irq = 7;
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LowDma = 1;
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HighDma = 5;
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MidiPort = 0x330;
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Type = 1;
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strupr(strncpy(Buffer,Blaster,sizeof(Buffer)));
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for (Ptr = strtok(Buffer," "); Ptr != NULL; Ptr = strtok(NULL," ")) {
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switch (*Ptr) {
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case 'A':
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if (!sscanf(Ptr,"A%03X",&Port)) return FALSE;
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break;
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case 'I':
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if (!sscanf(Ptr,"I%d",&Irq)) return FALSE;
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break;
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case 'D':
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if (!sscanf(Ptr,"D%d",&LowDma)) return FALSE;
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break;
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case 'H':
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if (!sscanf(Ptr,"H%d",&HighDma)) return FALSE;
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break;
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case 'P':
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if (!sscanf(Ptr,"P%03X",&MidiPort)) return FALSE;
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break;
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case 'T':
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if (!sscanf(Ptr,"T%d",&Type)) return FALSE;
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break;
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/*
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default:
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return FALSE;
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*/
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}
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}
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if (Type >= 6) {
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SC->ID = ID_SB16;
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SC->Modes = AF_16BITS | AF_STEREO;
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}
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else if (Type == 3) {
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SC->ID = ID_SB201;
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SC->Modes = AF_8BITS | AF_MONO;
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}
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else if ((Type == 2) || (Type == 4) || (Type == 5)) {
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SC->ID = ID_SBPRO;
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SC->Modes = AF_8BITS | AF_STEREO;
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}
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else {
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SC->ID = ID_SB;
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SC->Modes = AF_8BITS | AF_MONO;
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}
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SC->Port = Port;
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SC->IrqLine = Irq;
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SC->DmaChannel = (SC->Modes & AF_16BITS) ? HighDma : LowDma;
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SC->SampleRate = 22050;
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memcpy(SC->DriverName,"SB.DRV",6);
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return TRUE;
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}
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/****************************************************************************
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*
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* Function: GUSDetect
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* Parameters: SC - soundcard structure
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*
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* Returns: Returns true if a UltraSound card is present.
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*
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* Description: Autodetect soundcard device.
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*
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****************************************************************************/
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static int GUSDetect(SoundCard *SC)
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{
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char *Ultrasnd;
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int Port,PlayDma,RecDma,Gf1Irq,MidiIrq;
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if (!(Ultrasnd = getenv("ULTRASND")))
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return FALSE;
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if (sscanf(Ultrasnd,"%03X,%d,%d,%d,%d",
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&Port,&PlayDma,&RecDma,&Gf1Irq,&MidiIrq) != 5)
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return FALSE;
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SC->ID = ID_GUS;
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SC->Modes = AF_16BITS | AF_STEREO;
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SC->Port = Port;
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SC->IrqLine = Gf1Irq;
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SC->DmaChannel = PlayDma;
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SC->SampleRate = 44100;
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memcpy(SC->DriverName,"GUS.DRV",7);
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return TRUE;
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}
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/****************************************************************************
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*
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* Function: PASProbe
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* Parameters: Port - base I/O port address
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*
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* Returns: Returns true if a Pro Audio Spectrum is there.
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*
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* Description: Autodetect soundcard device.
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*
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****************************************************************************/
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static int PASProbe(int Port)
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{
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int Data;
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if ((Data = inp(Port ^ 0x388 ^ 0xB8B)) == 0xFF) return FALSE;
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outp(Port ^ 0x388 ^ 0xB8B, Data ^ 0xE0);
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return (inp(Port ^ 0x388 ^ 0xB8B) == Data);
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}
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/****************************************************************************
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*
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* Function: PASDetect
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* Parameters: SC - soundcard structure
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*
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* Returns: Returns true if a Pro Audio Spectrum is present.
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*
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* Description: Autodetect soundcard device.
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*
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****************************************************************************/
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static int PASDetect(SoundCard *SC)
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{
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union REGS regs;
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struct SREGS sregs;
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struct DPMIREGS dregs;
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int Port,Irq,Dma;
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memset((void*)®s,0,sizeof(regs));
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memset((void*)&sregs,0,sizeof(sregs));
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memset((void*)&dregs,0,sizeof(dregs));
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/* detect if MVSOUND.SYS is present */
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regs.w.ax = 0x0300;
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regs.h.bl = 0x2F;
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regs.h.bh = 0;
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regs.w.cx = 0;
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regs.x.edi = FP_OFF(&dregs);
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sregs.es = FP_SEG(&dregs);
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dregs.eax = 0xBC00;
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dregs.ebx = 0x3F3F;
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dregs.ecx = 0x0000;
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dregs.edx = 0x0000;
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int386x(0x31,®s,®s,&sregs);
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if (((dregs.ebx ^ dregs.ecx ^ dregs.edx) & 0xFFFF) != 0x4D56)
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return FALSE;
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/* call MVSOUND.SYS to ask for the IRQ and DMA parameters */
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regs.w.ax = 0x0300;
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regs.h.bl = 0x2F;
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regs.h.bh = 0;
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regs.w.cx = 0;
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regs.x.edi = FP_OFF(&dregs);
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sregs.es = FP_SEG(&dregs);
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dregs.eax = 0xBC04;
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int386x(0x31,®s,®s,&sregs);
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Irq = dregs.ecx & 0xFF;
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Dma = dregs.ebx & 0xFF;
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/* detect the I/O Port address */
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if (!PASProbe(Port = 0x388) && !PASProbe(Port = 0x384) &&
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!PASProbe(Port = 0x38C) && !PASProbe(Port = 0x288))
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return FALSE;
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SC->ID = ID_PAS;
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SC->Modes = AF_8BITS | AF_STEREO;
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SC->Port = Port;
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SC->IrqLine = Irq;
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SC->DmaChannel = Dma;
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SC->SampleRate = 22050;
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memcpy(SC->DriverName,"PAS.DRV",7);
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return TRUE;
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}
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/****************************************************************************
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*
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* Function: WSSProbe
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* Parameters: Port - base I/O port address
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*
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* Returns: Returns true if a Windows Sound System is there.
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*
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* Description: Autodetect soundcard device.
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*
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****************************************************************************/
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static int WSSProbe(int Port)
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{
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int data;
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if (!(inp(Port+0x04) & 0x80)) {
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outp(Port+0x04,0x0c);
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data = inp(Port+0x05);
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outp(Port+0x05,0x00);
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if ((inp(Port+0x04) == 0x0c) && (inp(Port+0x05) == data))
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return TRUE;
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}
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return FALSE;
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}
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/****************************************************************************
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*
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* Function: WSSDetect
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* Parameters: SC - soundcard structure
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*
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* Returns: Returns true if a Windows Sound System card is present.
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*
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* Description: Autodetect soundcard device.
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*
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****************************************************************************/
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static int WSSDetect(SoundCard *SC)
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{
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int Port;
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if (!WSSProbe(Port = 0x530) && !WSSProbe(Port = 0x604) &&
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!WSSProbe(Port = 0xE80) && !WSSProbe(Port = 0xF40))
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return FALSE;
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SC->ID = ID_WSS;
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SC->Modes = AF_16BITS | AF_STEREO;
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SC->Port = Port;
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SC->IrqLine = 7;
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SC->DmaChannel = 1;
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SC->SampleRate = 22050;
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memcpy(SC->DriverName,"WSS.DRV",7);
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return TRUE;
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}
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/****************************************************************************
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*
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* Function: dAutoDetect
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* Parameters: SC - Soundcard structure
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*
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* Description: Autodetect soundcard device.
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*
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****************************************************************************/
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int dAutoDetect(SoundCard *SC)
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{
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if (!GUSDetect(SC) && !PASDetect(SC) &&
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!SBDetect(SC) && !WSSDetect(SC)) {
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SC->ID = ID_NONE;
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SC->Modes = AF_8BITS | AF_MONO;
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SC->Port = SC->SampleRate = SC->IrqLine = SC->DmaChannel = 0;
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}
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return (SC->ID == ID_NONE);
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}
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