Document the DIOGADC ioctl (fetch analog->digital conversion)

1 files changed, 22 insertions, 1 deletions

diff --git a/share/man/man4/man4.sparc/daadio.4 b/share/man/man4/man4.sparc/daadio.4
index 4cdca7818d5..2d556c3f218 100644
--- a/share/man/man4/man4.sparc/daadio.4
+++ b/share/man/man4/man4.sparc/daadio.4
@@ -1,4 +1,4 @@
-.\"     $OpenBSD: daadio.4,v 1.1 2002/07/09 18:41:27 jason Exp $
+.\"     $OpenBSD: daadio.4,v 1.2 2002/07/17 02:30:10 jason Exp $
 .\"
 .\" Copyright (c) 2002 Jason L. Wright (jason@thought.net)
 .\" All rights reserved.
@@ -95,6 +95,27 @@ struct daadio_dac {
         u_int16_t dac_val;
 };
 .Ed
+.It Dv DIOGADC
+.Pq Li "struct daadio_adc"
+Get the value of the ADC port specified in
+.Ar dad_reg
+into
+.Ar dad_val .
+The lower 12 bits of
+.Ar dad_val
+are the conversion value, the upper four bits are used for status.
+The argument structure is defined as follows:
+.Bd -literal -offset indent
+struct daadio_adc {
+        u_int8_t dad_reg;
+        u_int16_t dad_val;
+#define ADC_IV 0x1000 /* out of range */
+#define ADC_PR 0x2000 /* pipeline empty */
+#define ADC_DR 0x4000 /* data ready */
+#define ADC_OW 0x8000 /* data overwritten */
+#define ADC_VAL 0x0fff /* the data */
+};
+.Ed
 .Sh SEE ALSO
 .Xr ioctl 2 ,
 .Xr fga 4