From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- sound/oss/aci.h | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 sound/oss/aci.h (limited to 'sound/oss/aci.h') diff --git a/sound/oss/aci.h b/sound/oss/aci.h new file mode 100644 index 00000000000..20102ee088e --- /dev/null +++ b/sound/oss/aci.h @@ -0,0 +1,57 @@ +#ifndef _ACI_H_ +#define _ACI_H_ + +extern int aci_port; +extern int aci_version; /* ACI firmware version */ +extern int aci_rw_cmd(int write1, int write2, int write3); + +#define aci_indexed_cmd(a, b) aci_rw_cmd(a, b, -1) +#define aci_write_cmd(a, b) aci_rw_cmd(a, b, -1) +#define aci_read_cmd(a) aci_rw_cmd(a,-1, -1) + +#define COMMAND_REGISTER (aci_port) /* write register */ +#define STATUS_REGISTER (aci_port + 1) /* read register */ +#define BUSY_REGISTER (aci_port + 2) /* also used for rds */ + +#define RDS_REGISTER BUSY_REGISTER + +#define ACI_SET_MUTE 0x0d +#define ACI_SET_POWERAMP 0x0f +#define ACI_SET_TUNERMUTE 0xa3 +#define ACI_SET_TUNERMONO 0xa4 +#define ACI_SET_IDE 0xd0 +#define ACI_SET_WSS 0xd1 +#define ACI_SET_SOLOMODE 0xd2 +#define ACI_WRITE_IGAIN 0x03 +#define ACI_WRITE_TUNE 0xa7 +#define ACI_READ_TUNERSTEREO 0xa8 +#define ACI_READ_TUNERSTATION 0xa9 +#define ACI_READ_VERSION 0xf1 +#define ACI_READ_IDCODE 0xf2 +#define ACI_INIT 0xff +#define ACI_STATUS 0xf0 +#define ACI_S_GENERAL 0x00 +#define ACI_S_READ_IGAIN 0x21 +#define ACI_ERROR_OP 0xdf + +/* + * The following macro SCALE can be used to scale one integer volume + * value into another one using only integer arithmetic. If the input + * value x is in the range 0 <= x <= xmax, then the result will be in + * the range 0 <= SCALE(xmax,ymax,x) <= ymax. + * + * This macro has for all xmax, ymax > 0 and all 0 <= x <= xmax the + * following nice properties: + * + * - SCALE(xmax,ymax,xmax) = ymax + * - SCALE(xmax,ymax,0) = 0 + * - SCALE(xmax,ymax,SCALE(ymax,xmax,SCALE(xmax,ymax,x))) = SCALE(xmax,ymax,x) + * + * In addition, the rounding error is minimal and nicely distributed. + * The proofs are left as an exercise to the reader. + */ + +#define SCALE(xmax,ymax,x) (((x)*(ymax)+(xmax)/2)/(xmax)) + + +#endif /* _ACI_H_ */ -- cgit v1.2.3