1#ifndef _ACI_H_ 2#define _ACI_H_ 3 4extern int aci_port; 5extern int aci_version; /* ACI firmware version */ 6extern 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