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1da177e4 LT |
1 | #ifndef _ACI_H_ |
2 | #define _ACI_H_ | |
3 | ||
4 | extern int aci_port; | |
5 | extern int aci_version; /* ACI firmware version */ | |
6 | extern int aci_rw_cmd(int write1, int write2, int write3); | |
7 | ||
8 | #define aci_indexed_cmd(a, b) aci_rw_cmd(a, b, -1) | |
9 | #define aci_write_cmd(a, b) aci_rw_cmd(a, b, -1) | |
10 | #define aci_read_cmd(a) aci_rw_cmd(a,-1, -1) | |
11 | ||
12 | #define COMMAND_REGISTER (aci_port) /* write register */ | |
13 | #define STATUS_REGISTER (aci_port + 1) /* read register */ | |
14 | #define BUSY_REGISTER (aci_port + 2) /* also used for rds */ | |
15 | ||
16 | #define RDS_REGISTER BUSY_REGISTER | |
17 | ||
18 | #define ACI_SET_MUTE 0x0d | |
19 | #define ACI_SET_POWERAMP 0x0f | |
20 | #define ACI_SET_TUNERMUTE 0xa3 | |
21 | #define ACI_SET_TUNERMONO 0xa4 | |
22 | #define ACI_SET_IDE 0xd0 | |
23 | #define ACI_SET_WSS 0xd1 | |
24 | #define ACI_SET_SOLOMODE 0xd2 | |
25 | #define ACI_WRITE_IGAIN 0x03 | |
26 | #define ACI_WRITE_TUNE 0xa7 | |
27 | #define ACI_READ_TUNERSTEREO 0xa8 | |
28 | #define ACI_READ_TUNERSTATION 0xa9 | |
29 | #define ACI_READ_VERSION 0xf1 | |
30 | #define ACI_READ_IDCODE 0xf2 | |
31 | #define ACI_INIT 0xff | |
32 | #define ACI_STATUS 0xf0 | |
33 | #define ACI_S_GENERAL 0x00 | |
34 | #define ACI_S_READ_IGAIN 0x21 | |
35 | #define ACI_ERROR_OP 0xdf | |
36 | ||
37 | /* | |
38 | * The following macro SCALE can be used to scale one integer volume | |
39 | * value into another one using only integer arithmetic. If the input | |
40 | * value x is in the range 0 <= x <= xmax, then the result will be in | |
41 | * the range 0 <= SCALE(xmax,ymax,x) <= ymax. | |
42 | * | |
43 | * This macro has for all xmax, ymax > 0 and all 0 <= x <= xmax the | |
44 | * following nice properties: | |
45 | * | |
46 | * - SCALE(xmax,ymax,xmax) = ymax | |
47 | * - SCALE(xmax,ymax,0) = 0 | |
48 | * - SCALE(xmax,ymax,SCALE(ymax,xmax,SCALE(xmax,ymax,x))) = SCALE(xmax,ymax,x) | |
49 | * | |
50 | * In addition, the rounding error is minimal and nicely distributed. | |
51 | * The proofs are left as an exercise to the reader. | |
52 | */ | |
53 | ||
54 | #define SCALE(xmax,ymax,x) (((x)*(ymax)+(xmax)/2)/(xmax)) | |
55 | ||
56 | ||
57 | #endif /* _ACI_H_ */ |