521 строка
22 KiB
C
521 строка
22 KiB
C
/*
|
|
* kbdif.h -- Xen virtual keyboard/mouse
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal in the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
|
|
* Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
|
|
*/
|
|
|
|
#ifndef __XEN_PUBLIC_IO_KBDIF_H__
|
|
#define __XEN_PUBLIC_IO_KBDIF_H__
|
|
|
|
/*
|
|
*****************************************************************************
|
|
* Feature and Parameter Negotiation
|
|
*****************************************************************************
|
|
*
|
|
* The two halves of a para-virtual driver utilize nodes within
|
|
* XenStore to communicate capabilities and to negotiate operating parameters.
|
|
* This section enumerates these nodes which reside in the respective front and
|
|
* backend portions of XenStore, following XenBus convention.
|
|
*
|
|
* All data in XenStore is stored as strings. Nodes specifying numeric
|
|
* values are encoded in decimal. Integer value ranges listed below are
|
|
* expressed as fixed sized integer types capable of storing the conversion
|
|
* of a properly formated node string, without loss of information.
|
|
*
|
|
*****************************************************************************
|
|
* Backend XenBus Nodes
|
|
*****************************************************************************
|
|
*
|
|
*---------------------------- Features supported ----------------------------
|
|
*
|
|
* Capable backend advertises supported features by publishing
|
|
* corresponding entries in XenStore and puts 1 as the value of the entry.
|
|
* If a feature is not supported then 0 must be set or feature entry omitted.
|
|
*
|
|
* feature-abs-pointer
|
|
* Values: <uint>
|
|
*
|
|
* Backends, which support reporting of absolute coordinates for pointer
|
|
* device should set this to 1.
|
|
*
|
|
* feature-multi-touch
|
|
* Values: <uint>
|
|
*
|
|
* Backends, which support reporting of multi-touch events
|
|
* should set this to 1.
|
|
*
|
|
*------------------------- Pointer Device Parameters ------------------------
|
|
*
|
|
* width
|
|
* Values: <uint>
|
|
*
|
|
* Maximum X coordinate (width) to be used by the frontend
|
|
* while reporting input events, pixels, [0; UINT32_MAX].
|
|
*
|
|
* height
|
|
* Values: <uint>
|
|
*
|
|
* Maximum Y coordinate (height) to be used by the frontend
|
|
* while reporting input events, pixels, [0; UINT32_MAX].
|
|
*
|
|
*****************************************************************************
|
|
* Frontend XenBus Nodes
|
|
*****************************************************************************
|
|
*
|
|
*------------------------------ Feature request -----------------------------
|
|
*
|
|
* Capable frontend requests features from backend via setting corresponding
|
|
* entries to 1 in XenStore. Requests for features not advertised as supported
|
|
* by the backend have no effect.
|
|
*
|
|
* request-abs-pointer
|
|
* Values: <uint>
|
|
*
|
|
* Request backend to report absolute pointer coordinates
|
|
* (XENKBD_TYPE_POS) instead of relative ones (XENKBD_TYPE_MOTION).
|
|
*
|
|
* request-multi-touch
|
|
* Values: <uint>
|
|
*
|
|
* Request backend to report multi-touch events.
|
|
*
|
|
*----------------------- Request Transport Parameters -----------------------
|
|
*
|
|
* event-channel
|
|
* Values: <uint>
|
|
*
|
|
* The identifier of the Xen event channel used to signal activity
|
|
* in the ring buffer.
|
|
*
|
|
* page-gref
|
|
* Values: <uint>
|
|
*
|
|
* The Xen grant reference granting permission for the backend to map
|
|
* a sole page in a single page sized event ring buffer.
|
|
*
|
|
* page-ref
|
|
* Values: <uint>
|
|
*
|
|
* OBSOLETE, not recommended for use.
|
|
* PFN of the shared page.
|
|
*
|
|
*----------------------- Multi-touch Device Parameters -----------------------
|
|
*
|
|
* multi-touch-num-contacts
|
|
* Values: <uint>
|
|
*
|
|
* Number of simultaneous touches reported.
|
|
*
|
|
* multi-touch-width
|
|
* Values: <uint>
|
|
*
|
|
* Width of the touch area to be used by the frontend
|
|
* while reporting input events, pixels, [0; UINT32_MAX].
|
|
*
|
|
* multi-touch-height
|
|
* Values: <uint>
|
|
*
|
|
* Height of the touch area to be used by the frontend
|
|
* while reporting input events, pixels, [0; UINT32_MAX].
|
|
*/
|
|
|
|
/*
|
|
* EVENT CODES.
|
|
*/
|
|
|
|
#define XENKBD_TYPE_MOTION 1
|
|
#define XENKBD_TYPE_RESERVED 2
|
|
#define XENKBD_TYPE_KEY 3
|
|
#define XENKBD_TYPE_POS 4
|
|
#define XENKBD_TYPE_MTOUCH 5
|
|
|
|
/* Multi-touch event sub-codes */
|
|
|
|
#define XENKBD_MT_EV_DOWN 0
|
|
#define XENKBD_MT_EV_UP 1
|
|
#define XENKBD_MT_EV_MOTION 2
|
|
#define XENKBD_MT_EV_SYN 3
|
|
#define XENKBD_MT_EV_SHAPE 4
|
|
#define XENKBD_MT_EV_ORIENT 5
|
|
|
|
/*
|
|
* CONSTANTS, XENSTORE FIELD AND PATH NAME STRINGS, HELPERS.
|
|
*/
|
|
|
|
#define XENKBD_DRIVER_NAME "vkbd"
|
|
|
|
#define XENKBD_FIELD_FEAT_ABS_POINTER "feature-abs-pointer"
|
|
#define XENKBD_FIELD_FEAT_MTOUCH "feature-multi-touch"
|
|
#define XENKBD_FIELD_REQ_ABS_POINTER "request-abs-pointer"
|
|
#define XENKBD_FIELD_REQ_MTOUCH "request-multi-touch"
|
|
#define XENKBD_FIELD_RING_GREF "page-gref"
|
|
#define XENKBD_FIELD_EVT_CHANNEL "event-channel"
|
|
#define XENKBD_FIELD_WIDTH "width"
|
|
#define XENKBD_FIELD_HEIGHT "height"
|
|
#define XENKBD_FIELD_MT_WIDTH "multi-touch-width"
|
|
#define XENKBD_FIELD_MT_HEIGHT "multi-touch-height"
|
|
#define XENKBD_FIELD_MT_NUM_CONTACTS "multi-touch-num-contacts"
|
|
|
|
/* OBSOLETE, not recommended for use */
|
|
#define XENKBD_FIELD_RING_REF "page-ref"
|
|
|
|
/*
|
|
*****************************************************************************
|
|
* Description of the protocol between frontend and backend driver.
|
|
*****************************************************************************
|
|
*
|
|
* The two halves of a Para-virtual driver communicate with
|
|
* each other using a shared page and an event channel.
|
|
* Shared page contains a ring with event structures.
|
|
*
|
|
* All reserved fields in the structures below must be 0.
|
|
*
|
|
*****************************************************************************
|
|
* Backend to frontend events
|
|
*****************************************************************************
|
|
*
|
|
* Frontends should ignore unknown in events.
|
|
* All event packets have the same length (40 octets)
|
|
* All event packets have common header:
|
|
*
|
|
* 0 octet
|
|
* +-----------------+
|
|
* | type |
|
|
* +-----------------+
|
|
* type - uint8_t, event code, XENKBD_TYPE_???
|
|
*
|
|
*
|
|
* Pointer relative movement event
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_MOTION | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | rel_x | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | rel_y | 12
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | rel_z | 16
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 20
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* rel_x - int32_t, relative X motion
|
|
* rel_y - int32_t, relative Y motion
|
|
* rel_z - int32_t, relative Z motion (wheel)
|
|
*/
|
|
|
|
struct xenkbd_motion {
|
|
uint8_t type;
|
|
int32_t rel_x;
|
|
int32_t rel_y;
|
|
int32_t rel_z;
|
|
};
|
|
|
|
/*
|
|
* Key event (includes pointer buttons)
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_KEY | pressed | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | keycode | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 12
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* pressed - uint8_t, 1 if pressed; 0 otherwise
|
|
* keycode - uint32_t, KEY_* from linux/input.h
|
|
*/
|
|
|
|
struct xenkbd_key {
|
|
uint8_t type;
|
|
uint8_t pressed;
|
|
uint32_t keycode;
|
|
};
|
|
|
|
/*
|
|
* Pointer absolute position event
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_POS | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | abs_x | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | abs_y | 12
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | rel_z | 16
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 20
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* abs_x - int32_t, absolute X position (in FB pixels)
|
|
* abs_y - int32_t, absolute Y position (in FB pixels)
|
|
* rel_z - int32_t, relative Z motion (wheel)
|
|
*/
|
|
|
|
struct xenkbd_position {
|
|
uint8_t type;
|
|
int32_t abs_x;
|
|
int32_t abs_y;
|
|
int32_t rel_z;
|
|
};
|
|
|
|
/*
|
|
* Multi-touch event and its sub-types
|
|
*
|
|
* All multi-touch event packets have common header:
|
|
*
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_MTOUCH | event_type | contact_id | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* event_type - unt8_t, multi-touch event sub-type, XENKBD_MT_EV_???
|
|
* contact_id - unt8_t, ID of the contact
|
|
*
|
|
* Touch interactions can consist of one or more contacts.
|
|
* For each contact, a series of events is generated, starting
|
|
* with a down event, followed by zero or more motion events,
|
|
* and ending with an up event. Events relating to the same
|
|
* contact point can be identified by the ID of the sequence: contact ID.
|
|
* Contact ID may be reused after XENKBD_MT_EV_UP event and
|
|
* is in the [0; XENKBD_FIELD_NUM_CONTACTS - 1] range.
|
|
*
|
|
* For further information please refer to documentation on Wayland [1],
|
|
* Linux [2] and Windows [3] multi-touch support.
|
|
*
|
|
* [1] https://cgit.freedesktop.org/wayland/wayland/tree/protocol/wayland.xml
|
|
* [2] https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.rst
|
|
* [3] https://msdn.microsoft.com/en-us/library/jj151564(v=vs.85).aspx
|
|
*
|
|
*
|
|
* Multi-touch down event - sent when a new touch is made: touch is assigned
|
|
* a unique contact ID, sent with this and consequent events related
|
|
* to this touch.
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_MTOUCH | _MT_EV_DOWN | contact_id | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | abs_x | 12
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | abs_y | 16
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 20
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* abs_x - int32_t, absolute X position, in pixels
|
|
* abs_y - int32_t, absolute Y position, in pixels
|
|
*
|
|
* Multi-touch contact release event
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_MTOUCH | _MT_EV_UP | contact_id | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* Multi-touch motion event
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_MTOUCH | _MT_EV_MOTION | contact_id | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | abs_x | 12
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | abs_y | 16
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 20
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* abs_x - int32_t, absolute X position, in pixels,
|
|
* abs_y - int32_t, absolute Y position, in pixels,
|
|
*
|
|
* Multi-touch input synchronization event - shows end of a set of events
|
|
* which logically belong together.
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_MTOUCH | _MT_EV_SYN | contact_id | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* Multi-touch shape event - touch point's shape has changed its shape.
|
|
* Shape is approximated by an ellipse through the major and minor axis
|
|
* lengths: major is the longer diameter of the ellipse and minor is the
|
|
* shorter one. Center of the ellipse is reported via
|
|
* XENKBD_MT_EV_DOWN/XENKBD_MT_EV_MOTION events.
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_MTOUCH | _MT_EV_SHAPE | contact_id | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | major | 12
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | minor | 16
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 20
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* major - unt32_t, length of the major axis, pixels
|
|
* minor - unt32_t, length of the minor axis, pixels
|
|
*
|
|
* Multi-touch orientation event - touch point's shape has changed
|
|
* its orientation: calculated as a clockwise angle between the major axis
|
|
* of the ellipse and positive Y axis in degrees, [-180; +180].
|
|
* 0 1 2 3 octet
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | _TYPE_MTOUCH | _MT_EV_ORIENT | contact_id | reserved | 4
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 8
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | orientation | reserved | 12
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 16
|
|
* +----------------+----------------+----------------+----------------+
|
|
* |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
|
|
* +----------------+----------------+----------------+----------------+
|
|
* | reserved | 40
|
|
* +----------------+----------------+----------------+----------------+
|
|
*
|
|
* orientation - int16_t, clockwise angle of the major axis
|
|
*/
|
|
|
|
struct xenkbd_mtouch {
|
|
uint8_t type; /* XENKBD_TYPE_MTOUCH */
|
|
uint8_t event_type; /* XENKBD_MT_EV_??? */
|
|
uint8_t contact_id;
|
|
uint8_t reserved[5]; /* reserved for the future use */
|
|
union {
|
|
struct {
|
|
int32_t abs_x; /* absolute X position, pixels */
|
|
int32_t abs_y; /* absolute Y position, pixels */
|
|
} pos;
|
|
struct {
|
|
uint32_t major; /* length of the major axis, pixels */
|
|
uint32_t minor; /* length of the minor axis, pixels */
|
|
} shape;
|
|
int16_t orientation; /* clockwise angle of the major axis */
|
|
} u;
|
|
};
|
|
|
|
#define XENKBD_IN_EVENT_SIZE 40
|
|
|
|
union xenkbd_in_event {
|
|
uint8_t type;
|
|
struct xenkbd_motion motion;
|
|
struct xenkbd_key key;
|
|
struct xenkbd_position pos;
|
|
struct xenkbd_mtouch mtouch;
|
|
char pad[XENKBD_IN_EVENT_SIZE];
|
|
};
|
|
|
|
/*
|
|
*****************************************************************************
|
|
* Frontend to backend events
|
|
*****************************************************************************
|
|
*
|
|
* Out events may be sent only when requested by backend, and receipt
|
|
* of an unknown out event is an error.
|
|
* No out events currently defined.
|
|
|
|
* All event packets have the same length (40 octets)
|
|
* All event packets have common header:
|
|
* 0 octet
|
|
* +-----------------+
|
|
* | type |
|
|
* +-----------------+
|
|
* type - uint8_t, event code
|
|
*/
|
|
|
|
#define XENKBD_OUT_EVENT_SIZE 40
|
|
|
|
union xenkbd_out_event {
|
|
uint8_t type;
|
|
char pad[XENKBD_OUT_EVENT_SIZE];
|
|
};
|
|
|
|
/*
|
|
*****************************************************************************
|
|
* Shared page
|
|
*****************************************************************************
|
|
*/
|
|
|
|
#define XENKBD_IN_RING_SIZE 2048
|
|
#define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
|
|
#define XENKBD_IN_RING_OFFS 1024
|
|
#define XENKBD_IN_RING(page) \
|
|
((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
|
|
#define XENKBD_IN_RING_REF(page, idx) \
|
|
(XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
|
|
|
|
#define XENKBD_OUT_RING_SIZE 1024
|
|
#define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
|
|
#define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
|
|
#define XENKBD_OUT_RING(page) \
|
|
((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
|
|
#define XENKBD_OUT_RING_REF(page, idx) \
|
|
(XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
|
|
|
|
struct xenkbd_page {
|
|
uint32_t in_cons, in_prod;
|
|
uint32_t out_cons, out_prod;
|
|
};
|
|
|
|
#endif /* __XEN_PUBLIC_IO_KBDIF_H__ */
|