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FMC TDC 1ns 5cha
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FMC TDC 1ns 5cha
Commits
f6e36321
Commit
f6e36321
authored
Oct 05, 2012
by
Samuel Iglesias Gonsálvez
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tdc: fix count calculation
Signed-off-by:
Samuel Iglesias Gonsalvez
<
siglesias@igalia.com
>
parent
3322f47b
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9 additions
and
5 deletions
+9
-5
tdc-fmc.c
drivers/tdc-fmc.c
+9
-5
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drivers/tdc-fmc.c
View file @
f6e36321
...
...
@@ -19,6 +19,9 @@
#include <linux/atomic.h>
#include <linux/semaphore.h>
#include <linux/zio.h>
#include <linux/zio-trigger.h>
#include "spec.h"
#include "tdc.h"
#include "hw/tdc_regs.h"
...
...
@@ -57,9 +60,9 @@ static int tdc_fmc_check_lost_events(u32 curr_wr_ptr, u32 prev_wr_ptr, int *coun
dacapo_prev
=
prev_wr_ptr
>>
12
;
dacapo_curr
=
curr_wr_ptr
>>
12
;
curr_wr_ptr
&=
0x00fff
;
/* Pick last 12 bits */
curr_wr_ptr
>>=
2
;
/* Remove last 4 byte
s. */
curr_wr_ptr
>>=
4
;
/* Remove last 4 bit
s. */
prev_wr_ptr
&=
0x00fff
;
/* Pick last 12 bits */
prev_wr_ptr
>>=
2
;
/* Remove last 4 byte
s. */
prev_wr_ptr
>>=
4
;
/* Remove last 4 bit
s. */
dacapo_diff
=
dacapo_curr
-
dacapo_prev
;
switch
(
dacapo_diff
)
{
...
...
@@ -137,11 +140,11 @@ static void tdc_fmc_irq_work(struct work_struct *work)
/* Start reading in the oldest event */
if
(
count
==
TDC_EVENT_BUFFER_SIZE
)
rd_ptr
=
(
curr_wr_ptr
>>
2
)
&
0x000ff
;
/* The oldest is curr_wr_ptr */
rd_ptr
=
(
curr_wr_ptr
>>
4
)
&
0x000ff
;
/* The oldest is curr_wr_ptr */
else
rd_ptr
=
(
prev_wr_ptr
>>
2
)
&
0x000ff
;
/* The oldest is prev_wr_ptr */
rd_ptr
=
(
prev_wr_ptr
>>
4
)
&
0x000ff
;
/* The oldest is prev_wr_ptr */
pr_err
(
"SIG: %s count %d
\n
"
,
__func__
,
count
);
pr_err
(
"SIG: %s count %d
\n
"
,
__func__
,
count
);
for
(
;
count
>
0
;
count
--
)
{
tmp_data
=
&
events
[
rd_ptr
];
...
...
@@ -160,6 +163,7 @@ static void tdc_fmc_irq_work(struct work_struct *work)
*/
//up(&tdc->event[chan].lock);
rd_ptr
=
(
rd_ptr
+
1
)
%
TDC_EVENT_BUFFER_SIZE
;
//zio_fire_trigger(tdc->hwzdev->cset[chan].ti);
}
dma_out:
...
...
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