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From kernel 3.4, extraction of the MT slot state is supported
via the EVIOGMTSLOTS ioctl. This patch initializes the slots
using that information.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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In the upcoming 2.6.38 kernel, support for hovering is introduced.
Add the ABS_MT_DISTANCE to the extended set of handled ABS_MT events.
The change is binary compatible with existing libraries.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The current mtdev is not ABI stable, and the upcoming additions
to the kernel api will break ABI. This patch starts the process
of keeping binary compatibility with old programs, by moving the
abi-specific parts under a special flag, MTDEV_NO_LEGACY_API,
and makes sure the internal parts compiles with MTDEV_NO_LEGACY_API
set. This way, older programs will still work, old programs will
still compile, and new programs will be able to use the additions.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Reported-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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list, so make sure it is always defined in mtdev.h
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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This patch changes the package description title in all relevant
files, and touches up the README. All systems go.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The current MT slot protocol allows any tracking id outside the range
specified by the device to denote an unused slot. This is difficult to
handle in userspace, since the valid range is unknown. This patch
tightens the definition of a valid tracking id to always lie in the
range [0, MT_ID_MAX], and uses the value -1 to denote an unused slot.
Acked-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Split the api into plumbing and porcelain layers and move the
plumbing part to its own optional header file.
The main usecase is to fetch events from the device, route them
through the converter and extract the processed events. To simplify
the API, replace the intermediate mtdev_pull() function by the
higher-level mtdev_get(). This function does all the required steps,
and has the same semantics as read().
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The current semantics, that a non-empty conversion pipe means
the device is not idle, is not very useful. This patch changes
the semantics to simply checking if the fetch buffer is empty,
and if there are no events to fetch from the device.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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When reading from non-blocking devices, it makes sense to read
all events available. This patch lets a zero max_events achieve that.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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The argument order in mtdev_fetch() differs from all other
usages involved the file descriptor. Fixed with this patch.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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This patch adds the mtdev_idle() function, which checks the kernel
device for activity. Useful when implementing timing logic.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
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