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_ */
58
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