Moved mpu401 into sound
[reactos.git] / reactos / drivers / sound / sound / dsp.c
1 /*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: drivers/dd/sound/dsp.c
5 * PURPOSE: Digital Signal Processing ?
6 * PROGRAMMER: Snatched from ?
7 *
8 * UPDATE HISTORY:
9 * ??/??/??: Created
10 * 10/23/02: Steven Edwards (Steven_Ed4153@yahoo.com)
11 * Minor build fix
12 */
13
14 #include "sb16.h"
15 #include "dsp.h"
16
17 /************************************
18 * unsigned char read_dsp(void)
19 *
20 * Reads the DSP chip
21 * Arguments: none
22 * Returns: Byte read
23 ************************************/
24 unsigned char read_dsp(unsigned short base)
25 {
26 // while((inb(base+0x0e)&0x80)==0); //Wait until there is something to read
27 // return inb(base+0x0a);
28 return 0;
29 }
30
31 /************************************'
32 * sb_status detect_dsp(void);
33 *
34 * Detects if a SB16 is installed
35 * Arguments: None
36 * Returns: Success or failure
37 ************************************/
38 sb_status detect_dsp(SB16* sb16)
39 {
40 for(base=0x200;base<0x280;base+=0x10) //Tries to reset all DSP addresses there is
41 if(reset_dsp(base)==SB_TRUE)
42 {
43 sb16->base=base;
44 return SB_TRUE;
45 }
46 return SB_FALSE;
47 }
48
49 /**************************************
50 * sb_status reset_dsp(unsigned short base_address);
51 *
52 * Tries to reset a DSP chip
53 * Arguments: base address
54 * Returns: Success of failure
55 **************************************/
56 sb_status reset_dsp(unsigned short base_address)
57 {
58 // int delay;
59
60 // outb(base_address+DSP_RESET_PORT,1);
61 // for(delay=0;delay<0xffff;delay++);
62
63 // outb(base_address+DSP_RESET_PORT,0);
64 // for(delay=0;delay<0xffff;delay++);
65
66 // if((inb(base_address+DSP_READ_STATUS_PORT)&0x80)==0) return SB_FALSE;
67
68 // if(inb(base_address+DSP_READ_DATA_PORT)!=0xAA) return SB_FALSE;
69
70 return SB_TRUE;
71 }
72
73 void write_dsp(unsigned short base,unsigned char data)
74 {
75 // while ((inb(base+DSP_WRITE_PORT) & 0x80) != 0);
76 // outb(base+DSP_WRITE_PORT, data);
77 }
78