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Date: Fri, 27 Mar 2015 19:13:41 +0000
From: Ian Abbott <abbotti@....co.uk>
To: <driverdev-devel@...uxdriverproject.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Ian Abbott <abbotti@....co.uk>,
H Hartley Sweeten <hartleys@...ionengravers.com>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH 01/60] staging: comedi: comedi_fc.h: begin migration to comedidev.h
"comedi_fc.h" contains a few inline functions used by the `do_cmdtest`
handler functions for comedi subdevices in several low-level comedi
drivers for checking asynchronous command trigger sources and arguments.
They all use the prefix `cfc_check_trigger_arg`. Copy them over to
"../comedidev.h", but change the `cfc_` prefix to `comedi_`. Change the
original functions in "comedi_fc.h" into simple wrappers for their
replacements.
Once the drivers have been changed to call the replacement functions,
"comedi_fc.h" can be removed.
Signed-off-by: Ian Abbott <abbotti@....co.uk>
---
drivers/staging/comedi/comedidev.h | 78 ++++++++++++++++++++++++++++++
drivers/staging/comedi/drivers/comedi_fc.h | 62 ++++--------------------
2 files changed, 87 insertions(+), 53 deletions(-)
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index 4720dbc..dfab5a8 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -464,6 +464,84 @@ static inline unsigned int comedi_samples_to_bytes(struct comedi_subdevice *s,
return nsamples << comedi_sample_shift(s);
}
+/**
+ * comedi_check_trigger_src() - trivially validate a comedi_cmd trigger source
+ * @src: pointer to the trigger source to validate
+ * @flags: bitmask of valid TRIG_* for the trigger
+ *
+ * This is used in "step 1" of the do_cmdtest functions of comedi drivers
+ * to vaildate the comedi_cmd triggers. The mask of the @src against the
+ * @flags allows the userspace comedilib to pass all the comedi_cmd
+ * triggers as TRIG_ANY and get back a bitmask of the valid trigger sources.
+ */
+static inline int comedi_check_trigger_src(unsigned int *src,
+ unsigned int flags)
+{
+ unsigned int orig_src = *src;
+
+ *src = orig_src & flags;
+ if (*src == TRIG_INVALID || *src != orig_src)
+ return -EINVAL;
+ return 0;
+}
+
+/**
+ * comedi_check_trigger_is_unique() - make sure a trigger source is unique
+ * @src: the trigger source to check
+ */
+static inline int comedi_check_trigger_is_unique(unsigned int src)
+{
+ /* this test is true if more than one _src bit is set */
+ if ((src & (src - 1)) != 0)
+ return -EINVAL;
+ return 0;
+}
+
+/**
+ * comedi_check_trigger_arg_is() - trivially validate a trigger argument
+ * @arg: pointer to the trigger arg to validate
+ * @val: the value the argument should be
+ */
+static inline int comedi_check_trigger_arg_is(unsigned int *arg,
+ unsigned int val)
+{
+ if (*arg != val) {
+ *arg = val;
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/**
+ * comedi_check_trigger_arg_min() - trivially validate a trigger argument
+ * @arg: pointer to the trigger arg to validate
+ * @val: the minimum value the argument should be
+ */
+static inline int comedi_check_trigger_arg_min(unsigned int *arg,
+ unsigned int val)
+{
+ if (*arg < val) {
+ *arg = val;
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/**
+ * comedi_check_trigger_arg_max() - trivially validate a trigger argument
+ * @arg: pointer to the trigger arg to validate
+ * @val: the maximum value the argument should be
+ */
+static inline int comedi_check_trigger_arg_max(unsigned int *arg,
+ unsigned int val)
+{
+ if (*arg > val) {
+ *arg = val;
+ return -EINVAL;
+ }
+ return 0;
+}
+
/*
* Must set dev->hw_dev if you wish to dma directly into comedi's buffer.
* Also useful for retrieving a previously configured hardware device of
diff --git a/drivers/staging/comedi/drivers/comedi_fc.h b/drivers/staging/comedi/drivers/comedi_fc.h
index 756be93..5765c61 100644
--- a/drivers/staging/comedi/drivers/comedi_fc.h
+++ b/drivers/staging/comedi/drivers/comedi_fc.h
@@ -23,80 +23,36 @@
#include "../comedidev.h"
-/**
- * cfc_check_trigger_src() - trivially validate a comedi_cmd trigger source
- * @src: pointer to the trigger source to validate
- * @flags: bitmask of valid TRIG_* for the trigger
- *
- * This is used in "step 1" of the do_cmdtest functions of comedi drivers
- * to vaildate the comedi_cmd triggers. The mask of the @src against the
- * @flags allows the userspace comedilib to pass all the comedi_cmd
- * triggers as TRIG_ANY and get back a bitmask of the valid trigger sources.
+/*
+ * This file will be removed once drivers have migrated to using the
+ * replacement functions in "comedidev.h".
*/
+
static inline int cfc_check_trigger_src(unsigned int *src, unsigned int flags)
{
- unsigned int orig_src = *src;
-
- *src = orig_src & flags;
- if (*src == TRIG_INVALID || *src != orig_src)
- return -EINVAL;
- return 0;
+ return comedi_check_trigger_src(src, flags);
}
-/**
- * cfc_check_trigger_is_unique() - make sure a trigger source is unique
- * @src: the trigger source to check
- */
static inline int cfc_check_trigger_is_unique(unsigned int src)
{
- /* this test is true if more than one _src bit is set */
- if ((src & (src - 1)) != 0)
- return -EINVAL;
- return 0;
+ return comedi_check_trigger_is_unique(src);
}
-/**
- * cfc_check_trigger_arg_is() - trivially validate a trigger argument
- * @arg: pointer to the trigger arg to validate
- * @val: the value the argument should be
- */
static inline int cfc_check_trigger_arg_is(unsigned int *arg, unsigned int val)
{
- if (*arg != val) {
- *arg = val;
- return -EINVAL;
- }
- return 0;
+ return comedi_check_trigger_arg_is(arg, val);
}
-/**
- * cfc_check_trigger_arg_min() - trivially validate a trigger argument
- * @arg: pointer to the trigger arg to validate
- * @val: the minimum value the argument should be
- */
static inline int cfc_check_trigger_arg_min(unsigned int *arg,
unsigned int val)
{
- if (*arg < val) {
- *arg = val;
- return -EINVAL;
- }
- return 0;
+ return comedi_check_trigger_arg_min(arg, val);
}
-/**
- * cfc_check_trigger_arg_max() - trivially validate a trigger argument
- * @arg: pointer to the trigger arg to validate
- * @val: the maximum value the argument should be
- */
static inline int cfc_check_trigger_arg_max(unsigned int *arg,
unsigned int val)
{
- if (*arg > val) {
- *arg = val;
- return -EINVAL;
- }
- return 0;
+ return comedi_check_trigger_arg_max(arg, val);
}
#endif /* _COMEDI_FC_H */
--
2.1.4
--
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