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Simple VME FMC Carrier SVEC
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Simple VME FMC Carrier SVEC
Commits
e922da65
Commit
e922da65
authored
Oct 12, 2017
by
Federico Vaga
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kernel: add more comments
Signed-off-by:
Federico Vaga
<
federico.vaga@vaga.pv.it
>
parent
8cc7f7de
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20 additions
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2 deletions
+20
-2
svec-core.c
kernel/svec-core.c
+20
-2
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kernel/svec-core.c
View file @
e922da65
...
...
@@ -236,6 +236,7 @@ static int svec_fpga_write_word(struct svec_dev *svec,
* It starts the programming procedure
* It is usable only when there is a valid CR/CSR space mapped
* @svec svec device instance
* Return 0 on success, otherwise a negative errno number.
*/
static
int
svec_fpga_write_start
(
struct
svec_dev
*
svec
)
{
...
...
@@ -369,7 +370,7 @@ out:
* @inode file system node
* @file char device file open instance
*
* By just opening this device you m
ya
reset the FPGA
* By just opening this device you m
ay
reset the FPGA
* (unless other errors prevent the user from programming).
* Only one user at time can access the programming procedure.
* Return: 0 on success, otherwise a negative errno number
...
...
@@ -436,6 +437,7 @@ err_mod_get:
* destroy the instance that asked for FPGA reprogramming
* @inode file system node
* @file char device file open instance
* Return 0 on success, otherwise a negative errno number.
*/
static
int
svec_close
(
struct
inode
*
inode
,
struct
file
*
file
)
{
...
...
@@ -479,7 +481,7 @@ static int svec_close(struct inode *inode, struct file *file)
* @buf user space buffer
* @count user space buffer size
* @offp offset where to copy the buffer (ignored here)
* Return: number of byte actually copied
* Return: number of byte actually copied
, otherwise a negative errno
*/
static
ssize_t
svec_write
(
struct
file
*
file
,
const
char
__user
*
buf
,
size_t
count
,
loff_t
*
offp
)
...
...
@@ -527,6 +529,10 @@ static void svec_release(struct device *dev)
svec_minor_put
(
minor
);
}
/**
* It shows the current AFPGA programming locking status
*/
static
ssize_t
svec_afpga_lock_show
(
struct
device
*
dev
,
struct
device_attribute
*
attr
,
char
*
buf
)
...
...
@@ -538,6 +544,10 @@ static ssize_t svec_afpga_lock_show(struct device *dev,
"locked"
:
"unlocked"
);
}
/**
* It unlocks the AFPGA programming when the user write "unlock"
*/
static
ssize_t
svec_afpga_lock_store
(
struct
device
*
dev
,
struct
device_attribute
*
attr
,
const
char
*
buf
,
size_t
count
)
...
...
@@ -555,6 +565,7 @@ static ssize_t svec_afpga_lock_store(struct device *dev,
}
static
DEVICE_ATTR
(
lock
,
0644
,
svec_afpga_lock_show
,
svec_afpga_lock_store
);
static
struct
attribute
*
svec_dev_attrs
[]
=
{
&
dev_attr_lock
.
attr
,
NULL
,
...
...
@@ -569,6 +580,7 @@ static const struct attribute_group *svec_dev_groups[] = {
NULL
,
};
/**
* It initialize a new SVEC instance
* @pdev correspondend Linux device instance
...
...
@@ -633,6 +645,12 @@ err:
}
/**
* It removes a SVEC device instance
* @pdev Linux device pointer
* @ndev DEPRECATED Device instance
* Return: 0 on success, otherwise a negative errno number
*/
static
int
svec_remove
(
struct
device
*
pdev
,
unsigned
int
ndev
)
{
struct
svec_dev
*
svec
=
dev_get_drvdata
(
pdev
);
...
...
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