patch-2.4.4 linux/drivers/sound/aci.h

• Lines: 56
• Date: Fri Apr 13 20:26:07 2001
• Orig file: v2.4.3/linux/drivers/sound/aci.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/drivers/sound/aci.h linux/drivers/sound/aci.h
@@ -0,0 +1,55 @@
+#ifndef _ACI_H_
+#define _ACI_H_
+
+extern int aci_port;
+extern int aci_idcode[2];	/* manufacturer and product ID */
+extern int aci_version;		/* ACI firmware version	*/
+extern int aci_rw_cmd(int write1, int write2, int write3);
+
+extern char * aci_radio_name;
+extern int aci_rds_cmd(unsigned char cmd, unsigned char databuffer[], int datasize);
+
+#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 RDS_STATUS      0x01
+#define RDS_STATIONNAME 0x02
+#define RDS_TEXT        0x03
+#define RDS_ALTFREQ     0x04
+#define RDS_TIMEDATE    0x05
+#define RDS_PI_CODE     0x06
+#define RDS_PTYTATP     0x07
+#define RDS_RESET       0x08
+#define RDS_RXVALUE     0x09
+
+/*
+ * 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))
+
+extern void __exit unload_aci_rds(void);
+extern int __init attach_aci_rds(void);
+
+
+#endif  /* _ACI_H_ */