1 files changed, 57 insertions, 0 deletions

diff --git a/sound/oss/aci.h b/sound/oss/aci.h
new file mode 100644
index 000000000000..20102ee088eb
--- /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_ */