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Add functions to enable axis on the device in the kernel

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Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2013-06-04 16:24:11 +10:00
parent aff1db36da
commit 0e9ef8a22d
2 changed files with 85 additions and 8 deletions
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58
libevdev/libevdev.c
View file

@ -26,6 +26,7 @@
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <linux/uinput.h>
#include "libevdev.h"
#include "libevdev-int.h"
@ -753,8 +754,6 @@ libevdev_enable_event_type(struct libevdev *dev, unsigned int type)
set_bit(dev->bits, type);
/* FIXME: pass through to kernel */
return 0;
}
@ -766,8 +765,6 @@ libevdev_disable_event_type(struct libevdev *dev, unsigned int type)
clear_bit(dev->bits, type);
/* FIXME: pass through to kernel */
return 0;
}
@ -793,8 +790,6 @@ libevdev_enable_event_code(struct libevdev *dev, unsigned int type,
dev->abs_info[code] = *abs;
}
/* FIXME: pass through to kernel */
return 0;
}
@ -814,11 +809,58 @@ libevdev_disable_event_code(struct libevdev *dev, unsigned int type, unsigned in
clear_bit(mask, code);
/* FIXME: pass through to kernel */
return 0;
}
int
libevdev_kernel_enable_event_type(struct libevdev *dev, unsigned int type)
{
int rc;
if (type > EV_MAX)
return -1;
rc = ioctl(dev->fd, UI_SET_EVBIT, type);
if (rc != -1)
libevdev_enable_event_type(dev, type);
return (rc != -1) ? 0 : -errno;
}
int
libevdev_kernel_enable_event_code(struct libevdev *dev, unsigned int type, unsigned int code)
{
int rc;
int uinput_bit;
int max;
const unsigned long *mask;
rc = libevdev_kernel_enable_event_type(dev, type);
if (rc != 0)
return rc;
max = type_to_mask_const(dev, type, &mask);
if (code > max)
return -EINVAL;
switch(type) {
case EV_KEY: uinput_bit = UI_SET_KEYBIT; break;
case EV_REL: uinput_bit = UI_SET_RELBIT; break;
case EV_ABS: uinput_bit = UI_SET_ABSBIT; break;
case EV_MSC: uinput_bit = UI_SET_MSCBIT; break;
case EV_LED: uinput_bit = UI_SET_LEDBIT; break;
case EV_SND: uinput_bit = UI_SET_SNDBIT; break;
case EV_FF: uinput_bit = UI_SET_FFBIT; break;
case EV_SW: uinput_bit = UI_SET_SWBIT; break;
}
rc = ioctl(dev->fd, uinput_bit, type);
if (rc != -1)
libevdev_enable_event_type(dev, type);
return (rc != -1) ? 0 : -errno;
}
int
libevdev_kernel_set_abs_value(struct libevdev *dev, unsigned int code, const struct input_absinfo *abs)
{

35
libevdev/libevdev.h
View file

@ -454,6 +454,41 @@ int libevdev_enable_event_code(struct libevdev *dev, unsigned int type, unsigned
*/
int libevdev_disable_event_code(struct libevdev *dev, unsigned int type, unsigned int code);
/**
* Forcibly enable an event type on this device, even if the underlying
* device does not support it. While this cannot make the device actually
* report such events, it will now return true for libevdev_has_event_code.
*
* This will be written to the kernel.
*
* This cannot be undone, the kernel only allows to enable axes, not disable
* them.
*
* This function calls libevdev_kernel_enable_event_type if necessary.
*
* @param type The event type to enable (EV_ABS, EV_KEY, ...)
* @param code The event code to enable (ABS_X, REL_X, etc.)
*/
int libevdev_kernel_enable_event_type(struct libevdev *dev, unsigned int type);
/**
* Forcibly enable an event code on this device, even if the underlying
* device does not support it. While this cannot make the device actually
* report such events, it will now return true for libevdev_has_event_code.
*
* This will be written to the kernel.
*
* This cannot be undone, the kernel only allows to enable axes, not disable
* them.
*
* This function calls libevdev_kernel_enable_event_type if necessary.
*
* @param type The event type to enable (EV_ABS, EV_KEY, ...)
* @param code The event code to enable (ABS_X, REL_X, etc.)
*/
int libevdev_kernel_enable_event_code(struct libevdev *dev, unsigned int type, unsigned int code);
/**
* Set the device's EV_ABS/<code> axis to the value defined in the abs
* parameter. This will be written to the kernel.