Cleanup the defines for this register and its bits and remove the
redundant information in the comment.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/dt2811.c | 59 ++++++++++++---------------------
1 file changed, 21 insertions(+), 38 deletions(-)
diff --git a/drivers/staging/comedi/drivers/dt2811.c b/drivers/staging/comedi/drivers/dt2811.c
index 3cd9fe5..433cfd1 100644
--- a/drivers/staging/comedi/drivers/dt2811.c
+++ b/drivers/staging/comedi/drivers/dt2811.c
@@ -44,6 +44,25 @@
#include <linux/module.h>
#include "../comedidev.h"
+/*
+ * Register I/O map
+ */
+#define DT2811_ADCSR_REG 0x00 /* r/w A/D Control/Status */
+#define DT2811_ADCSR_ADDONE BIT(7) /* r 1=A/D conv done */
+#define DT2811_ADCSR_ADERROR BIT(6) /* r 1=A/D error */
+#define DT2811_ADCSR_ADBUSY BIT(5) /* r 1=A/D busy */
+#define DT2811_ADCSR_CLRERROR BIT(4)
+#define DT2811_ADCSR_INTENB BIT(2) /* r/w 1=interupts ena */
+#define DT2811_ADCSR_ADMODE(x) (((x) & 0x3) << 0)
+/* single conversion on ADGCR load */
+#define DT2811_ADCSR_ADMODE_SINGLE DT2811_ADCSR_ADMODE(0)
+/* continuous conversion, internal clock, (clock enabled on ADGCR load) */
+#define DT2811_ADCSR_ADMODE_CONT DT2811_ADCSR_ADMODE(1)
+/* continuous conversion, internal clock, external trigger */
+#define DT2811_ADCSR_ADMODE_EXT_TRIG DT2811_ADCSR_ADMODE(2)
+/* continuous conversion, external clock, external trigger */
+#define DT2811_ADCSR_ADMODE_EXT DT2811_ADCSR_ADMODE(3)
+
static const struct comedi_lrange range_dt2811_pgh_ai_5_unipolar = {
4, {
UNI_RANGE(5),
@@ -100,28 +119,6 @@ static const struct comedi_lrange range_dt2811_pgl_ai_5_bipolar = {
/*
- 0x00 ADCSR R/W A/D Control/Status Register
- bit 7 - (R) 1 indicates A/D conversion done
- reading ADDAT clears bit
- (W) ignored
- bit 6 - (R) 1 indicates A/D error
- (W) ignored
- bit 5 - (R) 1 indicates A/D busy, cleared at end
- of conversion
- (W) ignored
- bit 4 - (R) 0
- (W)
- bit 3 - (R) 0
- bit 2 - (R/W) 1 indicates interrupts enabled
- bits 1,0 - (R/W) mode bits
- 00 single conversion on ADGCR load
- 01 continuous conversion, internal clock,
- (clock enabled on ADGCR load)
- 10 continuous conversion, internal clock,
- external trigger
- 11 continuous conversion, external clock,
- external trigger
-
0x01 ADGCR R/W A/D Gain/Channel Register
bit 6,7 - (R/W) gain select
00 gain=1, both PGH, PGL models
@@ -169,7 +166,6 @@ static const struct comedi_lrange range_dt2811_pgl_ai_5_bipolar = {
#define TIMEOUT 10000
-#define DT2811_ADCSR 0
#define DT2811_ADGCR 1
#define DT2811_ADDATLO 2
#define DT2811_ADDATHI 3
@@ -180,19 +176,6 @@ static const struct comedi_lrange range_dt2811_pgl_ai_5_bipolar = {
#define DT2811_DIO 6
#define DT2811_TMRCTR 7
-/*
- * flags
- */
-
-/* ADCSR */
-
-#define DT2811_ADDONE 0x80
-#define DT2811_ADERROR 0x40
-#define DT2811_ADBUSY 0x20
-#define DT2811_CLRERROR 0x10
-#define DT2811_INTENB 0x04
-#define DT2811_ADMODE 0x03
-
struct dt2811_board {
const char *name;
const struct comedi_lrange *bip_5;
@@ -227,8 +210,8 @@ static int dt2811_ai_eoc(struct comedi_device *dev,
{
unsigned int status;
- status = inb(dev->iobase + DT2811_ADCSR);
- if ((status & DT2811_ADBUSY) == 0)
+ status = inb(dev->iobase + DT2811_ADCSR_REG);
+ if ((status & DT2811_ADCSR_ADBUSY) == 0)
return 0;
return -EBUSY;
}
--
2.6.3
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