1#ifndef _ACI_H_
2#define _ACI_H_
3
4extern int aci_port;
5extern int aci_idcode[2];	/* manufacturer and product ID */
6extern int aci_version;		/* ACI firmware version	*/
7extern int aci_rw_cmd(int write1, int write2, int write3);
8
9#define aci_indexed_cmd(a, b) aci_rw_cmd(a, b, -1)
10#define aci_write_cmd(a, b)   aci_rw_cmd(a, b, -1)
11#define aci_read_cmd(a)       aci_rw_cmd(a,-1, -1)
12
13#define COMMAND_REGISTER    (aci_port)      /* write register */
14#define STATUS_REGISTER     (aci_port + 1)  /* read register */
15#define BUSY_REGISTER       (aci_port + 2)  /* also used for rds */
16
17#define RDS_REGISTER        BUSY_REGISTER
18
19#define ACI_SET_MUTE          0x0d
20#define ACI_SET_POWERAMP      0x0f
21#define ACI_SET_TUNERMUTE     0xa3
22#define ACI_SET_TUNERMONO     0xa4
23#define ACI_SET_IDE           0xd0
24#define ACI_SET_WSS           0xd1
25#define ACI_SET_SOLOMODE      0xd2
26#define ACI_WRITE_IGAIN       0x03
27#define ACI_WRITE_TUNE        0xa7
28#define ACI_READ_TUNERSTEREO  0xa8
29#define ACI_READ_TUNERSTATION 0xa9
30#define ACI_READ_VERSION      0xf1
31#define ACI_READ_IDCODE       0xf2
32#define ACI_INIT              0xff
33#define ACI_STATUS            0xf0
34#define     ACI_S_GENERAL     0x00
35#define     ACI_S_READ_IGAIN  0x21
36#define ACI_ERROR_OP          0xdf
37
38/*
39 * The following macro SCALE can be used to scale one integer volume
40 * value into another one using only integer arithmetic. If the input
41 * value x is in the range 0 <= x <= xmax, then the result will be in
42 * the range 0 <= SCALE(xmax,ymax,x) <= ymax.
43 *
44 * This macro has for all xmax, ymax > 0 and all 0 <= x <= xmax the
45 * following nice properties:
46 *
47 * - SCALE(xmax,ymax,xmax) = ymax
48 * - SCALE(xmax,ymax,0) = 0
49 * - SCALE(xmax,ymax,SCALE(ymax,xmax,SCALE(xmax,ymax,x))) = SCALE(xmax,ymax,x)
50 *
51 * In addition, the rounding error is minimal and nicely distributed.
52 * The proofs are left as an exercise to the reader.
53 */
54
55#define SCALE(xmax,ymax,x) (((x)*(ymax)+(xmax)/2)/(xmax))
56
57
58#endif  /* _ACI_H_ */
59