1 /* SPDX-License-Identifier: MIT */ <<
2 /* 1 /*
3 * kbdif.h -- Xen virtual keyboard/mouse 2 * kbdif.h -- Xen virtual keyboard/mouse
4 * 3 *
>> 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
>> 5 * of this software and associated documentation files (the "Software"), to
>> 6 * deal in the Software without restriction, including without limitation the
>> 7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
>> 8 * sell copies of the Software, and to permit persons to whom the Software is
>> 9 * furnished to do so, subject to the following conditions:
>> 10 *
>> 11 * The above copyright notice and this permission notice shall be included in
>> 12 * all copies or substantial portions of the Software.
>> 13 *
>> 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
>> 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
>> 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
>> 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
>> 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
>> 19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
>> 20 * DEALINGS IN THE SOFTWARE.
>> 21 *
5 * Copyright (C) 2005 Anthony Liguori <aliguor 22 * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
6 * Copyright (C) 2006 Red Hat, Inc., Markus Ar 23 * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
7 */ 24 */
8 25
9 #ifndef __XEN_PUBLIC_IO_KBDIF_H__ 26 #ifndef __XEN_PUBLIC_IO_KBDIF_H__
10 #define __XEN_PUBLIC_IO_KBDIF_H__ 27 #define __XEN_PUBLIC_IO_KBDIF_H__
11 28
12 /* 29 /*
13 ********************************************* 30 *****************************************************************************
14 * Feature and Parameter N 31 * Feature and Parameter Negotiation
15 ********************************************* 32 *****************************************************************************
16 * 33 *
17 * The two halves of a para-virtual driver uti 34 * The two halves of a para-virtual driver utilize nodes within
18 * XenStore to communicate capabilities and to 35 * XenStore to communicate capabilities and to negotiate operating parameters.
19 * This section enumerates these nodes which r 36 * This section enumerates these nodes which reside in the respective front and
20 * backend portions of XenStore, following Xen 37 * backend portions of XenStore, following XenBus convention.
21 * 38 *
22 * All data in XenStore is stored as strings. 39 * All data in XenStore is stored as strings. Nodes specifying numeric
23 * values are encoded in decimal. Integer valu 40 * values are encoded in decimal. Integer value ranges listed below are
24 * expressed as fixed sized integer types capa 41 * expressed as fixed sized integer types capable of storing the conversion
25 * of a properly formated node string, without 42 * of a properly formated node string, without loss of information.
26 * 43 *
27 ********************************************* 44 *****************************************************************************
28 * Backend XenBus N 45 * Backend XenBus Nodes
29 ********************************************* 46 *****************************************************************************
30 * 47 *
31 *---------------------------- Features suppor 48 *---------------------------- Features supported ----------------------------
32 * 49 *
33 * Capable backend advertises supported featur 50 * Capable backend advertises supported features by publishing
34 * corresponding entries in XenStore and puts 51 * corresponding entries in XenStore and puts 1 as the value of the entry.
35 * If a feature is not supported then 0 must b 52 * If a feature is not supported then 0 must be set or feature entry omitted.
36 * 53 *
37 * feature-disable-keyboard <<
38 * Values: <uint> <<
39 * <<
40 * If there is no need to expose a virtua <<
41 * frontend then this must be set to 1. <<
42 * <<
43 * feature-disable-pointer <<
44 * Values: <uint> <<
45 * <<
46 * If there is no need to expose a virtua <<
47 * frontend then this must be set to 1. <<
48 * <<
49 * feature-abs-pointer 54 * feature-abs-pointer
50 * Values: <uint> 55 * Values: <uint>
51 * 56 *
52 * Backends, which support reporting of a 57 * Backends, which support reporting of absolute coordinates for pointer
53 * device should set this to 1. 58 * device should set this to 1.
54 * 59 *
55 * feature-multi-touch 60 * feature-multi-touch
56 * Values: <uint> 61 * Values: <uint>
57 * 62 *
58 * Backends, which support reporting of m 63 * Backends, which support reporting of multi-touch events
59 * should set this to 1. 64 * should set this to 1.
60 * 65 *
61 * feature-raw-pointer <<
62 * Values: <uint> <<
63 * <<
64 * Backends, which support reporting raw <<
65 * for pointer devices should set this to <<
66 * a range of [0, 0x7fff]. <<
67 * <<
68 *----------------------- Device Instance Par <<
69 * <<
70 * unique-id <<
71 * Values: <string> <<
72 * <<
73 * After device instance initialization i <<
74 * so every instance of the frontend can <<
75 * by this ID. This can be UUID or such. <<
76 * <<
77 *------------------------- Pointer Device Par 66 *------------------------- Pointer Device Parameters ------------------------
78 * 67 *
79 * width 68 * width
80 * Values: <uint> 69 * Values: <uint>
81 * 70 *
82 * Maximum X coordinate (width) to be use 71 * Maximum X coordinate (width) to be used by the frontend
83 * while reporting input events, pixels, 72 * while reporting input events, pixels, [0; UINT32_MAX].
84 * 73 *
85 * height 74 * height
86 * Values: <uint> 75 * Values: <uint>
87 * 76 *
88 * Maximum Y coordinate (height) to be us 77 * Maximum Y coordinate (height) to be used by the frontend
89 * while reporting input events, pixels, 78 * while reporting input events, pixels, [0; UINT32_MAX].
90 * 79 *
91 *----------------------- Multi-touch Device P <<
92 * <<
93 * multi-touch-num-contacts <<
94 * Values: <uint> <<
95 * <<
96 * Number of simultaneous touches reporte <<
97 * <<
98 * multi-touch-width <<
99 * Values: <uint> <<
100 * <<
101 * Width of the touch area to be used by <<
102 * while reporting input events, pixels, <<
103 * <<
104 * multi-touch-height <<
105 * Values: <uint> <<
106 * <<
107 * Height of the touch area to be used by <<
108 * while reporting input events, pixels, <<
109 * <<
110 ********************************************* 80 *****************************************************************************
111 * Frontend XenBus 81 * Frontend XenBus Nodes
112 ********************************************* 82 *****************************************************************************
113 * 83 *
114 *------------------------------ Feature reque 84 *------------------------------ Feature request -----------------------------
115 * 85 *
116 * Capable frontend requests features from bac 86 * Capable frontend requests features from backend via setting corresponding
117 * entries to 1 in XenStore. Requests for feat 87 * entries to 1 in XenStore. Requests for features not advertised as supported
118 * by the backend have no effect. 88 * by the backend have no effect.
119 * 89 *
120 * request-abs-pointer 90 * request-abs-pointer
121 * Values: <uint> 91 * Values: <uint>
122 * 92 *
123 * Request backend to report absolute poi 93 * Request backend to report absolute pointer coordinates
124 * (XENKBD_TYPE_POS) instead of relative 94 * (XENKBD_TYPE_POS) instead of relative ones (XENKBD_TYPE_MOTION).
125 * 95 *
126 * request-multi-touch 96 * request-multi-touch
127 * Values: <uint> 97 * Values: <uint>
128 * 98 *
129 * Request backend to report multi-touch 99 * Request backend to report multi-touch events.
130 * 100 *
131 * request-raw-pointer <<
132 * Values: <uint> <<
133 * <<
134 * Request backend to report raw unscaled <<
135 * This option is only valid if request-a <<
136 * Raw unscaled coordinates have the rang <<
137 * <<
138 *----------------------- Request Transport Pa 101 *----------------------- Request Transport Parameters -----------------------
139 * 102 *
140 * event-channel 103 * event-channel
141 * Values: <uint> 104 * Values: <uint>
142 * 105 *
143 * The identifier of the Xen event channe 106 * The identifier of the Xen event channel used to signal activity
144 * in the ring buffer. 107 * in the ring buffer.
145 * 108 *
146 * page-gref 109 * page-gref
147 * Values: <uint> 110 * Values: <uint>
148 * 111 *
149 * The Xen grant reference granting permi 112 * The Xen grant reference granting permission for the backend to map
150 * a sole page in a single page sized eve 113 * a sole page in a single page sized event ring buffer.
151 * 114 *
152 * page-ref 115 * page-ref
153 * Values: <uint> 116 * Values: <uint>
154 * 117 *
155 * OBSOLETE, not recommended for use. 118 * OBSOLETE, not recommended for use.
156 * PFN of the shared page. 119 * PFN of the shared page.
>> 120 *
>> 121 *----------------------- Multi-touch Device Parameters -----------------------
>> 122 *
>> 123 * multi-touch-num-contacts
>> 124 * Values: <uint>
>> 125 *
>> 126 * Number of simultaneous touches reported.
>> 127 *
>> 128 * multi-touch-width
>> 129 * Values: <uint>
>> 130 *
>> 131 * Width of the touch area to be used by the frontend
>> 132 * while reporting input events, pixels, [0; UINT32_MAX].
>> 133 *
>> 134 * multi-touch-height
>> 135 * Values: <uint>
>> 136 *
>> 137 * Height of the touch area to be used by the frontend
>> 138 * while reporting input events, pixels, [0; UINT32_MAX].
157 */ 139 */
158 140
159 /* 141 /*
160 * EVENT CODES. 142 * EVENT CODES.
161 */ 143 */
162 144
163 #define XENKBD_TYPE_MOTION 1 145 #define XENKBD_TYPE_MOTION 1
164 #define XENKBD_TYPE_RESERVED 2 146 #define XENKBD_TYPE_RESERVED 2
165 #define XENKBD_TYPE_KEY 3 147 #define XENKBD_TYPE_KEY 3
166 #define XENKBD_TYPE_POS 4 148 #define XENKBD_TYPE_POS 4
167 #define XENKBD_TYPE_MTOUCH 5 149 #define XENKBD_TYPE_MTOUCH 5
168 150
169 /* Multi-touch event sub-codes */ 151 /* Multi-touch event sub-codes */
170 152
171 #define XENKBD_MT_EV_DOWN 0 153 #define XENKBD_MT_EV_DOWN 0
172 #define XENKBD_MT_EV_UP 1 154 #define XENKBD_MT_EV_UP 1
173 #define XENKBD_MT_EV_MOTION 2 155 #define XENKBD_MT_EV_MOTION 2
174 #define XENKBD_MT_EV_SYN 3 156 #define XENKBD_MT_EV_SYN 3
175 #define XENKBD_MT_EV_SHAPE 4 157 #define XENKBD_MT_EV_SHAPE 4
176 #define XENKBD_MT_EV_ORIENT 5 158 #define XENKBD_MT_EV_ORIENT 5
177 159
178 /* 160 /*
179 * CONSTANTS, XENSTORE FIELD AND PATH NAME STR 161 * CONSTANTS, XENSTORE FIELD AND PATH NAME STRINGS, HELPERS.
180 */ 162 */
181 163
182 #define XENKBD_DRIVER_NAME "vkbd" 164 #define XENKBD_DRIVER_NAME "vkbd"
183 165
184 #define XENKBD_FIELD_FEAT_DSBL_KEYBRD "featu <<
185 #define XENKBD_FIELD_FEAT_DSBL_POINTER "featu <<
186 #define XENKBD_FIELD_FEAT_ABS_POINTER "featu 166 #define XENKBD_FIELD_FEAT_ABS_POINTER "feature-abs-pointer"
187 #define XENKBD_FIELD_FEAT_RAW_POINTER "featu <<
188 #define XENKBD_FIELD_FEAT_MTOUCH "featu 167 #define XENKBD_FIELD_FEAT_MTOUCH "feature-multi-touch"
189 #define XENKBD_FIELD_REQ_ABS_POINTER "reque 168 #define XENKBD_FIELD_REQ_ABS_POINTER "request-abs-pointer"
190 #define XENKBD_FIELD_REQ_RAW_POINTER "reque <<
191 #define XENKBD_FIELD_REQ_MTOUCH "reque 169 #define XENKBD_FIELD_REQ_MTOUCH "request-multi-touch"
192 #define XENKBD_FIELD_RING_GREF "page- 170 #define XENKBD_FIELD_RING_GREF "page-gref"
193 #define XENKBD_FIELD_EVT_CHANNEL "event 171 #define XENKBD_FIELD_EVT_CHANNEL "event-channel"
194 #define XENKBD_FIELD_WIDTH "width 172 #define XENKBD_FIELD_WIDTH "width"
195 #define XENKBD_FIELD_HEIGHT "heigh 173 #define XENKBD_FIELD_HEIGHT "height"
196 #define XENKBD_FIELD_MT_WIDTH "multi 174 #define XENKBD_FIELD_MT_WIDTH "multi-touch-width"
197 #define XENKBD_FIELD_MT_HEIGHT "multi 175 #define XENKBD_FIELD_MT_HEIGHT "multi-touch-height"
198 #define XENKBD_FIELD_MT_NUM_CONTACTS "multi 176 #define XENKBD_FIELD_MT_NUM_CONTACTS "multi-touch-num-contacts"
199 #define XENKBD_FIELD_UNIQUE_ID "uniqu <<
200 177
201 /* OBSOLETE, not recommended for use */ 178 /* OBSOLETE, not recommended for use */
202 #define XENKBD_FIELD_RING_REF "page- 179 #define XENKBD_FIELD_RING_REF "page-ref"
203 180
204 /* 181 /*
205 ********************************************* 182 *****************************************************************************
206 * Description of the protocol between fronten 183 * Description of the protocol between frontend and backend driver.
207 ********************************************* 184 *****************************************************************************
208 * 185 *
209 * The two halves of a Para-virtual driver com 186 * The two halves of a Para-virtual driver communicate with
210 * each other using a shared page and an event 187 * each other using a shared page and an event channel.
211 * Shared page contains a ring with event stru 188 * Shared page contains a ring with event structures.
212 * 189 *
213 * All reserved fields in the structures below 190 * All reserved fields in the structures below must be 0.
214 * 191 *
215 ********************************************* 192 *****************************************************************************
216 * Backend to fronte 193 * Backend to frontend events
217 ********************************************* 194 *****************************************************************************
218 * 195 *
219 * Frontends should ignore unknown in events. 196 * Frontends should ignore unknown in events.
220 * All event packets have the same length (40 197 * All event packets have the same length (40 octets)
221 * All event packets have common header: 198 * All event packets have common header:
222 * 199 *
223 * 0 octet 200 * 0 octet
224 * +-----------------+ 201 * +-----------------+
225 * | type | 202 * | type |
226 * +-----------------+ 203 * +-----------------+
227 * type - uint8_t, event code, XENKBD_TYPE_??? 204 * type - uint8_t, event code, XENKBD_TYPE_???
228 * 205 *
229 * 206 *
230 * Pointer relative movement event 207 * Pointer relative movement event
231 * 0 1 208 * 0 1 2 3 octet
232 * +----------------+----------------+-------- 209 * +----------------+----------------+----------------+----------------+
233 * | _TYPE_MOTION | rese 210 * | _TYPE_MOTION | reserved | 4
234 * +----------------+----------------+-------- 211 * +----------------+----------------+----------------+----------------+
235 * | rel_x 212 * | rel_x | 8
236 * +----------------+----------------+-------- 213 * +----------------+----------------+----------------+----------------+
237 * | rel_y 214 * | rel_y | 12
238 * +----------------+----------------+-------- 215 * +----------------+----------------+----------------+----------------+
239 * | rel_z 216 * | rel_z | 16
240 * +----------------+----------------+-------- 217 * +----------------+----------------+----------------+----------------+
241 * | reserved 218 * | reserved | 20
242 * +----------------+----------------+-------- 219 * +----------------+----------------+----------------+----------------+
243 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 220 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
244 * +----------------+----------------+-------- 221 * +----------------+----------------+----------------+----------------+
245 * | reserved 222 * | reserved | 40
246 * +----------------+----------------+-------- 223 * +----------------+----------------+----------------+----------------+
247 * 224 *
248 * rel_x - int32_t, relative X motion 225 * rel_x - int32_t, relative X motion
249 * rel_y - int32_t, relative Y motion 226 * rel_y - int32_t, relative Y motion
250 * rel_z - int32_t, relative Z motion (wheel) 227 * rel_z - int32_t, relative Z motion (wheel)
251 */ 228 */
252 229
253 struct xenkbd_motion { 230 struct xenkbd_motion {
254 uint8_t type; 231 uint8_t type;
255 int32_t rel_x; 232 int32_t rel_x;
256 int32_t rel_y; 233 int32_t rel_y;
257 int32_t rel_z; 234 int32_t rel_z;
258 }; 235 };
259 236
260 /* 237 /*
261 * Key event (includes pointer buttons) 238 * Key event (includes pointer buttons)
262 * 0 1 239 * 0 1 2 3 octet
263 * +----------------+----------------+-------- 240 * +----------------+----------------+----------------+----------------+
264 * | _TYPE_KEY | pressed | 241 * | _TYPE_KEY | pressed | reserved | 4
265 * +----------------+----------------+-------- 242 * +----------------+----------------+----------------+----------------+
266 * | keycode 243 * | keycode | 8
267 * +----------------+----------------+-------- 244 * +----------------+----------------+----------------+----------------+
268 * | reserved 245 * | reserved | 12
269 * +----------------+----------------+-------- 246 * +----------------+----------------+----------------+----------------+
270 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 247 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
271 * +----------------+----------------+-------- 248 * +----------------+----------------+----------------+----------------+
272 * | reserved 249 * | reserved | 40
273 * +----------------+----------------+-------- 250 * +----------------+----------------+----------------+----------------+
274 * 251 *
275 * pressed - uint8_t, 1 if pressed; 0 otherwis 252 * pressed - uint8_t, 1 if pressed; 0 otherwise
276 * keycode - uint32_t, KEY_* from linux/input. 253 * keycode - uint32_t, KEY_* from linux/input.h
277 */ 254 */
278 255
279 struct xenkbd_key { 256 struct xenkbd_key {
280 uint8_t type; 257 uint8_t type;
281 uint8_t pressed; 258 uint8_t pressed;
282 uint32_t keycode; 259 uint32_t keycode;
283 }; 260 };
284 261
285 /* 262 /*
286 * Pointer absolute position event 263 * Pointer absolute position event
287 * 0 1 264 * 0 1 2 3 octet
288 * +----------------+----------------+-------- 265 * +----------------+----------------+----------------+----------------+
289 * | _TYPE_POS | rese 266 * | _TYPE_POS | reserved | 4
290 * +----------------+----------------+-------- 267 * +----------------+----------------+----------------+----------------+
291 * | abs_x 268 * | abs_x | 8
292 * +----------------+----------------+-------- 269 * +----------------+----------------+----------------+----------------+
293 * | abs_y 270 * | abs_y | 12
294 * +----------------+----------------+-------- 271 * +----------------+----------------+----------------+----------------+
295 * | rel_z 272 * | rel_z | 16
296 * +----------------+----------------+-------- 273 * +----------------+----------------+----------------+----------------+
297 * | reserved 274 * | reserved | 20
298 * +----------------+----------------+-------- 275 * +----------------+----------------+----------------+----------------+
299 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 276 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
300 * +----------------+----------------+-------- 277 * +----------------+----------------+----------------+----------------+
301 * | reserved 278 * | reserved | 40
302 * +----------------+----------------+-------- 279 * +----------------+----------------+----------------+----------------+
303 * 280 *
304 * abs_x - int32_t, absolute X position (in FB 281 * abs_x - int32_t, absolute X position (in FB pixels)
305 * abs_y - int32_t, absolute Y position (in FB 282 * abs_y - int32_t, absolute Y position (in FB pixels)
306 * rel_z - int32_t, relative Z motion (wheel) 283 * rel_z - int32_t, relative Z motion (wheel)
307 */ 284 */
308 285
309 struct xenkbd_position { 286 struct xenkbd_position {
310 uint8_t type; 287 uint8_t type;
311 int32_t abs_x; 288 int32_t abs_x;
312 int32_t abs_y; 289 int32_t abs_y;
313 int32_t rel_z; 290 int32_t rel_z;
314 }; 291 };
315 292
316 /* 293 /*
317 * Multi-touch event and its sub-types 294 * Multi-touch event and its sub-types
318 * 295 *
319 * All multi-touch event packets have common h 296 * All multi-touch event packets have common header:
320 * 297 *
321 * 0 1 298 * 0 1 2 3 octet
322 * +----------------+----------------+-------- 299 * +----------------+----------------+----------------+----------------+
323 * | _TYPE_MTOUCH | event_type | conta 300 * | _TYPE_MTOUCH | event_type | contact_id | reserved | 4
324 * +----------------+----------------+-------- 301 * +----------------+----------------+----------------+----------------+
325 * | reserved 302 * | reserved | 8
326 * +----------------+----------------+-------- 303 * +----------------+----------------+----------------+----------------+
327 * 304 *
328 * event_type - unt8_t, multi-touch event sub- 305 * event_type - unt8_t, multi-touch event sub-type, XENKBD_MT_EV_???
329 * contact_id - unt8_t, ID of the contact 306 * contact_id - unt8_t, ID of the contact
330 * 307 *
331 * Touch interactions can consist of one or mo 308 * Touch interactions can consist of one or more contacts.
332 * For each contact, a series of events is gen 309 * For each contact, a series of events is generated, starting
333 * with a down event, followed by zero or more 310 * with a down event, followed by zero or more motion events,
334 * and ending with an up event. Events relatin 311 * and ending with an up event. Events relating to the same
335 * contact point can be identified by the ID o 312 * contact point can be identified by the ID of the sequence: contact ID.
336 * Contact ID may be reused after XENKBD_MT_EV 313 * Contact ID may be reused after XENKBD_MT_EV_UP event and
337 * is in the [0; XENKBD_FIELD_NUM_CONTACTS - 1 314 * is in the [0; XENKBD_FIELD_NUM_CONTACTS - 1] range.
338 * 315 *
339 * For further information please refer to doc 316 * For further information please refer to documentation on Wayland [1],
340 * Linux [2] and Windows [3] multi-touch suppo 317 * Linux [2] and Windows [3] multi-touch support.
341 * 318 *
342 * [1] https://cgit.freedesktop.org/wayland/wa 319 * [1] https://cgit.freedesktop.org/wayland/wayland/tree/protocol/wayland.xml
343 * [2] https://www.kernel.org/doc/Documentatio 320 * [2] https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.rst
344 * [3] https://msdn.microsoft.com/en-us/librar 321 * [3] https://msdn.microsoft.com/en-us/library/jj151564(v=vs.85).aspx
345 * 322 *
346 * 323 *
347 * Multi-touch down event - sent when a new to 324 * Multi-touch down event - sent when a new touch is made: touch is assigned
348 * a unique contact ID, sent with this and con 325 * a unique contact ID, sent with this and consequent events related
349 * to this touch. 326 * to this touch.
350 * 0 1 327 * 0 1 2 3 octet
351 * +----------------+----------------+-------- 328 * +----------------+----------------+----------------+----------------+
352 * | _TYPE_MTOUCH | _MT_EV_DOWN | conta 329 * | _TYPE_MTOUCH | _MT_EV_DOWN | contact_id | reserved | 4
353 * +----------------+----------------+-------- 330 * +----------------+----------------+----------------+----------------+
354 * | reserved 331 * | reserved | 8
355 * +----------------+----------------+-------- 332 * +----------------+----------------+----------------+----------------+
356 * | abs_x 333 * | abs_x | 12
357 * +----------------+----------------+-------- 334 * +----------------+----------------+----------------+----------------+
358 * | abs_y 335 * | abs_y | 16
359 * +----------------+----------------+-------- 336 * +----------------+----------------+----------------+----------------+
360 * | reserved 337 * | reserved | 20
361 * +----------------+----------------+-------- 338 * +----------------+----------------+----------------+----------------+
362 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 339 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
363 * +----------------+----------------+-------- 340 * +----------------+----------------+----------------+----------------+
364 * | reserved 341 * | reserved | 40
365 * +----------------+----------------+-------- 342 * +----------------+----------------+----------------+----------------+
366 * 343 *
367 * abs_x - int32_t, absolute X position, in pi 344 * abs_x - int32_t, absolute X position, in pixels
368 * abs_y - int32_t, absolute Y position, in pi 345 * abs_y - int32_t, absolute Y position, in pixels
369 * 346 *
370 * Multi-touch contact release event 347 * Multi-touch contact release event
371 * 0 1 348 * 0 1 2 3 octet
372 * +----------------+----------------+-------- 349 * +----------------+----------------+----------------+----------------+
373 * | _TYPE_MTOUCH | _MT_EV_UP | conta 350 * | _TYPE_MTOUCH | _MT_EV_UP | contact_id | reserved | 4
374 * +----------------+----------------+-------- 351 * +----------------+----------------+----------------+----------------+
375 * | reserved 352 * | reserved | 8
376 * +----------------+----------------+-------- 353 * +----------------+----------------+----------------+----------------+
377 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 354 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
378 * +----------------+----------------+-------- 355 * +----------------+----------------+----------------+----------------+
379 * | reserved 356 * | reserved | 40
380 * +----------------+----------------+-------- 357 * +----------------+----------------+----------------+----------------+
381 * 358 *
382 * Multi-touch motion event 359 * Multi-touch motion event
383 * 0 1 360 * 0 1 2 3 octet
384 * +----------------+----------------+-------- 361 * +----------------+----------------+----------------+----------------+
385 * | _TYPE_MTOUCH | _MT_EV_MOTION | conta 362 * | _TYPE_MTOUCH | _MT_EV_MOTION | contact_id | reserved | 4
386 * +----------------+----------------+-------- 363 * +----------------+----------------+----------------+----------------+
387 * | reserved 364 * | reserved | 8
388 * +----------------+----------------+-------- 365 * +----------------+----------------+----------------+----------------+
389 * | abs_x 366 * | abs_x | 12
390 * +----------------+----------------+-------- 367 * +----------------+----------------+----------------+----------------+
391 * | abs_y 368 * | abs_y | 16
392 * +----------------+----------------+-------- 369 * +----------------+----------------+----------------+----------------+
393 * | reserved 370 * | reserved | 20
394 * +----------------+----------------+-------- 371 * +----------------+----------------+----------------+----------------+
395 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 372 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
396 * +----------------+----------------+-------- 373 * +----------------+----------------+----------------+----------------+
397 * | reserved 374 * | reserved | 40
398 * +----------------+----------------+-------- 375 * +----------------+----------------+----------------+----------------+
399 * 376 *
400 * abs_x - int32_t, absolute X position, in pi 377 * abs_x - int32_t, absolute X position, in pixels,
401 * abs_y - int32_t, absolute Y position, in pi 378 * abs_y - int32_t, absolute Y position, in pixels,
402 * 379 *
403 * Multi-touch input synchronization event - s 380 * Multi-touch input synchronization event - shows end of a set of events
404 * which logically belong together. 381 * which logically belong together.
405 * 0 1 382 * 0 1 2 3 octet
406 * +----------------+----------------+-------- 383 * +----------------+----------------+----------------+----------------+
407 * | _TYPE_MTOUCH | _MT_EV_SYN | conta 384 * | _TYPE_MTOUCH | _MT_EV_SYN | contact_id | reserved | 4
408 * +----------------+----------------+-------- 385 * +----------------+----------------+----------------+----------------+
409 * | reserved 386 * | reserved | 8
410 * +----------------+----------------+-------- 387 * +----------------+----------------+----------------+----------------+
411 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 388 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
412 * +----------------+----------------+-------- 389 * +----------------+----------------+----------------+----------------+
413 * | reserved 390 * | reserved | 40
414 * +----------------+----------------+-------- 391 * +----------------+----------------+----------------+----------------+
415 * 392 *
416 * Multi-touch shape event - touch point's sha 393 * Multi-touch shape event - touch point's shape has changed its shape.
417 * Shape is approximated by an ellipse through 394 * Shape is approximated by an ellipse through the major and minor axis
418 * lengths: major is the longer diameter of th 395 * lengths: major is the longer diameter of the ellipse and minor is the
419 * shorter one. Center of the ellipse is repor 396 * shorter one. Center of the ellipse is reported via
420 * XENKBD_MT_EV_DOWN/XENKBD_MT_EV_MOTION event 397 * XENKBD_MT_EV_DOWN/XENKBD_MT_EV_MOTION events.
421 * 0 1 398 * 0 1 2 3 octet
422 * +----------------+----------------+-------- 399 * +----------------+----------------+----------------+----------------+
423 * | _TYPE_MTOUCH | _MT_EV_SHAPE | conta 400 * | _TYPE_MTOUCH | _MT_EV_SHAPE | contact_id | reserved | 4
424 * +----------------+----------------+-------- 401 * +----------------+----------------+----------------+----------------+
425 * | reserved 402 * | reserved | 8
426 * +----------------+----------------+-------- 403 * +----------------+----------------+----------------+----------------+
427 * | major 404 * | major | 12
428 * +----------------+----------------+-------- 405 * +----------------+----------------+----------------+----------------+
429 * | minor 406 * | minor | 16
430 * +----------------+----------------+-------- 407 * +----------------+----------------+----------------+----------------+
431 * | reserved 408 * | reserved | 20
432 * +----------------+----------------+-------- 409 * +----------------+----------------+----------------+----------------+
433 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 410 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
434 * +----------------+----------------+-------- 411 * +----------------+----------------+----------------+----------------+
435 * | reserved 412 * | reserved | 40
436 * +----------------+----------------+-------- 413 * +----------------+----------------+----------------+----------------+
437 * 414 *
438 * major - unt32_t, length of the major axis, 415 * major - unt32_t, length of the major axis, pixels
439 * minor - unt32_t, length of the minor axis, 416 * minor - unt32_t, length of the minor axis, pixels
440 * 417 *
441 * Multi-touch orientation event - touch point 418 * Multi-touch orientation event - touch point's shape has changed
442 * its orientation: calculated as a clockwise 419 * its orientation: calculated as a clockwise angle between the major axis
443 * of the ellipse and positive Y axis in degre 420 * of the ellipse and positive Y axis in degrees, [-180; +180].
444 * 0 1 421 * 0 1 2 3 octet
445 * +----------------+----------------+-------- 422 * +----------------+----------------+----------------+----------------+
446 * | _TYPE_MTOUCH | _MT_EV_ORIENT | conta 423 * | _TYPE_MTOUCH | _MT_EV_ORIENT | contact_id | reserved | 4
447 * +----------------+----------------+-------- 424 * +----------------+----------------+----------------+----------------+
448 * | reserved 425 * | reserved | 8
449 * +----------------+----------------+-------- 426 * +----------------+----------------+----------------+----------------+
450 * | orientation | 427 * | orientation | reserved | 12
451 * +----------------+----------------+-------- 428 * +----------------+----------------+----------------+----------------+
452 * | reserved 429 * | reserved | 16
453 * +----------------+----------------+-------- 430 * +----------------+----------------+----------------+----------------+
454 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ 431 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
455 * +----------------+----------------+-------- 432 * +----------------+----------------+----------------+----------------+
456 * | reserved 433 * | reserved | 40
457 * +----------------+----------------+-------- 434 * +----------------+----------------+----------------+----------------+
458 * 435 *
459 * orientation - int16_t, clockwise angle of t 436 * orientation - int16_t, clockwise angle of the major axis
460 */ 437 */
461 438
462 struct xenkbd_mtouch { 439 struct xenkbd_mtouch {
463 uint8_t type; /* XEN 440 uint8_t type; /* XENKBD_TYPE_MTOUCH */
464 uint8_t event_type; /* XEN 441 uint8_t event_type; /* XENKBD_MT_EV_??? */
465 uint8_t contact_id; 442 uint8_t contact_id;
466 uint8_t reserved[5]; /* res 443 uint8_t reserved[5]; /* reserved for the future use */
467 union { 444 union {
468 struct { 445 struct {
469 int32_t abs_x; /* abs 446 int32_t abs_x; /* absolute X position, pixels */
470 int32_t abs_y; /* abs 447 int32_t abs_y; /* absolute Y position, pixels */
471 } pos; 448 } pos;
472 struct { 449 struct {
473 uint32_t major; /* len 450 uint32_t major; /* length of the major axis, pixels */
474 uint32_t minor; /* len 451 uint32_t minor; /* length of the minor axis, pixels */
475 } shape; 452 } shape;
476 int16_t orientation; /* clo 453 int16_t orientation; /* clockwise angle of the major axis */
477 } u; 454 } u;
478 }; 455 };
479 456
480 #define XENKBD_IN_EVENT_SIZE 40 457 #define XENKBD_IN_EVENT_SIZE 40
481 458
482 union xenkbd_in_event { 459 union xenkbd_in_event {
483 uint8_t type; 460 uint8_t type;
484 struct xenkbd_motion motion; 461 struct xenkbd_motion motion;
485 struct xenkbd_key key; 462 struct xenkbd_key key;
486 struct xenkbd_position pos; 463 struct xenkbd_position pos;
487 struct xenkbd_mtouch mtouch; 464 struct xenkbd_mtouch mtouch;
488 char pad[XENKBD_IN_EVENT_SIZE]; 465 char pad[XENKBD_IN_EVENT_SIZE];
489 }; 466 };
490 467
491 /* 468 /*
492 ********************************************* 469 *****************************************************************************
493 * Frontend to back 470 * Frontend to backend events
494 ********************************************* 471 *****************************************************************************
495 * 472 *
496 * Out events may be sent only when requested 473 * Out events may be sent only when requested by backend, and receipt
497 * of an unknown out event is an error. 474 * of an unknown out event is an error.
498 * No out events currently defined. 475 * No out events currently defined.
499 476
500 * All event packets have the same length (40 477 * All event packets have the same length (40 octets)
501 * All event packets have common header: 478 * All event packets have common header:
502 * 0 octet 479 * 0 octet
503 * +-----------------+ 480 * +-----------------+
504 * | type | 481 * | type |
505 * +-----------------+ 482 * +-----------------+
506 * type - uint8_t, event code 483 * type - uint8_t, event code
507 */ 484 */
508 485
509 #define XENKBD_OUT_EVENT_SIZE 40 486 #define XENKBD_OUT_EVENT_SIZE 40
510 487
511 union xenkbd_out_event { 488 union xenkbd_out_event {
512 uint8_t type; 489 uint8_t type;
513 char pad[XENKBD_OUT_EVENT_SIZE]; 490 char pad[XENKBD_OUT_EVENT_SIZE];
514 }; 491 };
515 492
516 /* 493 /*
517 ********************************************* 494 *****************************************************************************
518 * Shared page 495 * Shared page
519 ********************************************* 496 *****************************************************************************
520 */ 497 */
521 498
522 #define XENKBD_IN_RING_SIZE 2048 499 #define XENKBD_IN_RING_SIZE 2048
523 #define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZ 500 #define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
524 #define XENKBD_IN_RING_OFFS 1024 501 #define XENKBD_IN_RING_OFFS 1024
525 #define XENKBD_IN_RING(page) \ 502 #define XENKBD_IN_RING(page) \
526 ((union xenkbd_in_event *)((char *)(pa 503 ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
527 #define XENKBD_IN_RING_REF(page, idx) \ 504 #define XENKBD_IN_RING_REF(page, idx) \
528 (XENKBD_IN_RING((page))[(idx) % XENKBD 505 (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
529 506
530 #define XENKBD_OUT_RING_SIZE 1024 507 #define XENKBD_OUT_RING_SIZE 1024
531 #define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_S 508 #define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
532 #define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_O 509 #define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
533 #define XENKBD_OUT_RING(page) \ 510 #define XENKBD_OUT_RING(page) \
534 ((union xenkbd_out_event *)((char *)(p 511 ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
535 #define XENKBD_OUT_RING_REF(page, idx) \ 512 #define XENKBD_OUT_RING_REF(page, idx) \
536 (XENKBD_OUT_RING((page))[(idx) % XENKB 513 (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
537 514
538 struct xenkbd_page { 515 struct xenkbd_page {
539 uint32_t in_cons, in_prod; 516 uint32_t in_cons, in_prod;
540 uint32_t out_cons, out_prod; 517 uint32_t out_cons, out_prod;
541 }; 518 };
542 519
543 #endif /* __XEN_PUBLIC_IO_KBDIF_H__ */ 520 #endif /* __XEN_PUBLIC_IO_KBDIF_H__ */
544 521
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