sound/oss/aci.h

   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_ */