The "comedi_fc" module contains a few functions useful to Comedi
drivers. Their functionality is being migrated to the core "comedi"
module and renamed to start with the prefix `comedi_`. As part of this
migration, move `cfc_inc_scan_progress()` into the core comedi module
and rename it to `comedi_inc_scan_progress()`. Change the external
declaration of `cfc_inc_scan_progress()` into an inline function that
calls `comedi_inc_scan_progress()`.
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
drivers/staging/comedi/comedidev.h | 2 ++
drivers/staging/comedi/drivers.c | 24 ++++++++++++++++++++++++
drivers/staging/comedi/drivers/comedi_fc.c | 13 -------------
drivers/staging/comedi/drivers/comedi_fc.h | 6 +++++-
4 files changed, 31 insertions(+), 14 deletions(-)
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index 1c69509..de69725 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -448,6 +448,8 @@ int comedi_dio_insn_config(struct comedi_device *, struct comedi_subdevice *,
unsigned int comedi_dio_update_state(struct comedi_subdevice *,
unsigned int *data);
unsigned int comedi_bytes_per_scan(struct comedi_subdevice *s);
+void comedi_inc_scan_progress(struct comedi_subdevice *s,
+ unsigned int num_bytes);
void *comedi_alloc_devpriv(struct comedi_device *, size_t);
int comedi_alloc_subdevices(struct comedi_device *, int);
diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index 891c092..691a2c4 100644
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -327,6 +327,30 @@ unsigned int comedi_bytes_per_scan(struct comedi_subdevice *s)
}
EXPORT_SYMBOL_GPL(comedi_bytes_per_scan);
+/**
+ * comedi_inc_scan_progress - update scan progress in asynchronous command
+ * @s: comedi_subdevice struct
+ * @num_bytes: amount of data in bytes to increment scan progress
+ *
+ * Increments the scan progress by the number of bytes specified by num_bytes.
+ * If the scan progress reaches or exceeds the scan length in bytes, reduce
+ * it modulo the scan length in bytes and set the "end of scan" asynchronous
+ * event flag to be processed later.
+ */
+void comedi_inc_scan_progress(struct comedi_subdevice *s,
+ unsigned int num_bytes)
+{
+ struct comedi_async *async = s->async;
+ unsigned int scan_length = comedi_bytes_per_scan(s);
+
+ async->scan_progress += num_bytes;
+ if (async->scan_progress >= scan_length) {
+ async->scan_progress %= scan_length;
+ async->events |= COMEDI_CB_EOS;
+ }
+}
+EXPORT_SYMBOL_GPL(comedi_inc_scan_progress);
+
static int insn_rw_emulate_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
diff --git a/drivers/staging/comedi/drivers/comedi_fc.c b/drivers/staging/comedi/drivers/comedi_fc.c
index 72fa718..8a4abe8 100644
--- a/drivers/staging/comedi/drivers/comedi_fc.c
+++ b/drivers/staging/comedi/drivers/comedi_fc.c
@@ -22,19 +22,6 @@
#include "comedi_fc.h"
-void cfc_inc_scan_progress(struct comedi_subdevice *s, unsigned int num_bytes)
-{
- struct comedi_async *async = s->async;
- unsigned int scan_length = comedi_bytes_per_scan(s);
-
- async->scan_progress += num_bytes;
- if (async->scan_progress >= scan_length) {
- async->scan_progress %= scan_length;
- async->events |= COMEDI_CB_EOS;
- }
-}
-EXPORT_SYMBOL_GPL(cfc_inc_scan_progress);
-
/* Writes an array of data points to comedi's buffer */
unsigned int cfc_write_array_to_buffer(struct comedi_subdevice *s,
void *data, unsigned int num_bytes)
diff --git a/drivers/staging/comedi/drivers/comedi_fc.h b/drivers/staging/comedi/drivers/comedi_fc.h
index 90acb8f..d0fe26c 100644
--- a/drivers/staging/comedi/drivers/comedi_fc.h
+++ b/drivers/staging/comedi/drivers/comedi_fc.h
@@ -28,7 +28,11 @@ static inline unsigned int cfc_bytes_per_scan(struct comedi_subdevice *s)
return comedi_bytes_per_scan(s);
}
-void cfc_inc_scan_progress(struct comedi_subdevice *, unsigned int num_bytes);
+static inline void cfc_inc_scan_progress(struct comedi_subdevice *s,
+ unsigned int num_bytes)
+{
+ comedi_inc_scan_progress(s, num_bytes);
+}
/* Writes an array of data points to comedi's buffer */
unsigned int cfc_write_array_to_buffer(struct comedi_subdevice *,
--
2.1.0
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