5 extern int aci_idcode[2]; /* manufacturer and product ID */
6 extern int aci_version; /* ACI firmware version */
7 extern int aci_rw_cmd(int write1, int write2, int write3);
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)
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 */
17 #define RDS_REGISTER BUSY_REGISTER
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
33 #define ACI_STATUS 0xf0
34 #define ACI_S_GENERAL 0x00
35 #define ACI_S_READ_IGAIN 0x21
36 #define ACI_ERROR_OP 0xdf
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.
44 * This macro has for all xmax, ymax > 0 and all 0 <= x <= xmax the
45 * following nice properties:
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)
51 * In addition, the rounding error is minimal and nicely distributed.
52 * The proofs are left as an exercise to the reader.
55 #define SCALE(xmax,ymax,x) (((x)*(ymax)+(xmax)/2)/(xmax))