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-rw-r--r--sound/oss/aci.h57
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_ */
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