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Date: Wed, 19 May 2010 19:22:37 +0200
From: Daniel Mack <daniel@...aq.de>
To: linux-kernel@...r.kernel.org
Cc: dmitry.torokhov@...il.com, linux-input@...r.kernel.org,
Daniel Mack <daniel@...aq.de>, Dmitry Torokhov <dtor@...l.ru>
Subject: [PATCH 4/4] input: dynamically allocate ABS information
As all callers are now changed to only use the input_abs_*() access
helpers, switching over to dynamically allocated ABS information is
easy.
Signed-off-by: Daniel Mack <daniel@...aq.de>
Cc: Dmitry Torokhov <dtor@...l.ru>
---
drivers/input/input.c | 26 ++++++++++++++++++++
include/linux/input.h | 63 +++++++++++++++++++++++++++++++-----------------
2 files changed, 67 insertions(+), 22 deletions(-)
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 5bc92f6..ced6b39 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -373,6 +373,25 @@ void input_inject_event(struct input_handle *handle,
EXPORT_SYMBOL(input_inject_event);
/**
+ * input_alloc_absinfo - allocates an input_absinfo struct
+ * @dev: the input device
+ * @axis: the ABS axis
+ *
+ * If the absinfo struct the caller asked for is already allocated, this
+ * functions will not do anything but return it.
+ */
+struct input_absinfo *input_alloc_absinfo(struct input_dev *dev, int axis)
+{
+ if (!dev->absinfo[axis])
+ dev->absinfo[axis] =
+ kzalloc(sizeof(struct input_absinfo), GFP_KERNEL);
+
+ WARN(!dev->absinfo[axis], "%s(): kzalloc() failed?\n", __func__);
+ return dev->absinfo[axis];
+}
+EXPORT_SYMBOL(input_alloc_absinfo);
+
+/**
* input_grab_device - grabs device for exclusive use
* @handle: input handle that wants to own the device
*
@@ -1276,9 +1295,16 @@ static const struct attribute_group *input_dev_attr_groups[] = {
static void input_dev_release(struct device *device)
{
+ int i;
struct input_dev *dev = to_input_dev(device);
input_ff_destroy(dev);
+
+ for (i = 0; i < ABS_CNT; i++) {
+ kfree(dev->absinfo[i]);
+ dev->absinfo[i] = NULL;
+ }
+
kfree(dev);
module_put(THIS_MODULE);
diff --git a/include/linux/input.h b/include/linux/input.h
index ff1ee6d..67650ab 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -1154,7 +1154,6 @@ struct input_dev {
int sync;
- int abs[ABS_CNT];
int rep[REP_MAX + 1];
unsigned long key[BITS_TO_LONGS(KEY_CNT)];
@@ -1162,11 +1161,7 @@ struct input_dev {
unsigned long snd[BITS_TO_LONGS(SND_CNT)];
unsigned long sw[BITS_TO_LONGS(SW_CNT)];
- int absmax[ABS_CNT];
- int absmin[ABS_CNT];
- int absfuzz[ABS_CNT];
- int absflat[ABS_CNT];
- int absres[ABS_CNT];
+ struct input_absinfo *absinfo[ABS_CNT];
int (*open)(struct input_dev *dev);
void (*close)(struct input_dev *dev);
@@ -1190,62 +1185,82 @@ struct input_dev {
static inline int input_abs(struct input_dev *dev, int axis)
{
- return dev->abs[axis];
+ struct input_absinfo *absinfo = dev->absinfo[axis];
+ return absinfo ? absinfo->value : 0;
}
static inline int input_abs_max(struct input_dev *dev, int axis)
{
- return dev->absmax[axis];
+ struct input_absinfo *absinfo = dev->absinfo[axis];
+ return absinfo ? absinfo->maximum : 0;
}
static inline int input_abs_min(struct input_dev *dev, int axis)
{
- return dev->absmin[axis];
+ struct input_absinfo *absinfo = dev->absinfo[axis];
+ return absinfo ? absinfo->minimum : 0;
}
static inline int input_abs_fuzz(struct input_dev *dev, int axis)
{
- return dev->absfuzz[axis];
+ struct input_absinfo *absinfo = dev->absinfo[axis];
+ return absinfo ? absinfo->fuzz : 0;
}
static inline int input_abs_flat(struct input_dev *dev, int axis)
{
- return dev->absflat[axis];
+ struct input_absinfo *absinfo = dev->absinfo[axis];
+ return absinfo ? absinfo->flat : 0;
}
static inline int input_abs_res(struct input_dev *dev, int axis)
{
- return dev->absres[axis];
+ struct input_absinfo *absinfo = dev->absinfo[axis];
+ return absinfo ? absinfo->resolution: 0;
}
+struct input_absinfo *input_alloc_absinfo(struct input_dev *dev, int axis);
+
static inline void input_abs_set(struct input_dev *dev, int axis, int val)
{
- dev->abs[axis] = val;
+ struct input_absinfo *absinfo = input_alloc_absinfo(dev, axis);
+ if (absinfo)
+ absinfo->value = val;
}
static inline void input_abs_set_max(struct input_dev *dev, int axis, int val)
{
- dev->absmax[axis] = val;
+ struct input_absinfo *absinfo = input_alloc_absinfo(dev, axis);
+ if (absinfo)
+ absinfo->maximum = val;
}
static inline void input_abs_set_min(struct input_dev *dev, int axis, int val)
{
- dev->absmin[axis] = val;
+ struct input_absinfo *absinfo = input_alloc_absinfo(dev, axis);
+ if (absinfo)
+ absinfo->minimum = val;
}
static inline void input_abs_set_fuzz(struct input_dev *dev, int axis, int val)
{
- dev->absfuzz[axis] = val;
+ struct input_absinfo *absinfo = input_alloc_absinfo(dev, axis);
+ if (absinfo)
+ absinfo->fuzz = val;
}
static inline void input_abs_set_flat(struct input_dev *dev, int axis, int val)
{
- dev->absflat[axis] = val;
+ struct input_absinfo *absinfo = input_alloc_absinfo(dev, axis);
+ if (absinfo)
+ absinfo->flat = val;
}
static inline void input_abs_set_res(struct input_dev *dev, int axis, int val)
{
- dev->absres[axis] = val;
+ struct input_absinfo *absinfo = input_alloc_absinfo(dev, axis);
+ if (absinfo)
+ absinfo->resolution = val;
}
/*
@@ -1469,10 +1484,14 @@ void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int
static inline void input_set_abs_params(struct input_dev *dev, int axis, int min, int max, int fuzz, int flat)
{
- dev->absmin[axis] = min;
- dev->absmax[axis] = max;
- dev->absfuzz[axis] = fuzz;
- dev->absflat[axis] = flat;
+ struct input_absinfo *absinfo = input_alloc_absinfo(dev, axis);
+ if (!absinfo)
+ return;
+
+ absinfo->minimum = min;
+ absinfo->maximum = max;
+ absinfo->fuzz = fuzz;
+ absinfo->flat = flat;
dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis);
}
--
1.7.1
--
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