6658905f |
1 | /*++\r |
2 | \r |
3 | Copyright (c) 1996-1998 Microsoft Corporation\r |
4 | \r |
5 | Module Name:\r |
6 | \r |
7 | HIDPI.H\r |
8 | \r |
9 | Abstract:\r |
10 | \r |
11 | Public Interface to the HID parsing library.\r |
12 | \r |
13 | Environment:\r |
14 | \r |
15 | Kernel & user mode\r |
16 | \r |
17 | --*/\r |
18 | \r |
19 | #ifndef __HIDPI_H__\r |
20 | #define __HIDPI_H__\r |
21 | \r |
22 | #include <pshpack4.h>\r |
23 | \r |
24 | // Please include "hidsdi.h" to use the user space (dll / parser)\r |
25 | // Please include "hidpddi.h" to use the kernel space parser\r |
26 | \r |
27 | //\r |
28 | // Special Link collection values for using the query functions\r |
29 | //\r |
30 | // Root collection references the collection at the base of the link\r |
31 | // collection tree.\r |
32 | // Unspecifies, references all collections in the link collection tree.\r |
33 | //\r |
34 | #define HIDP_LINK_COLLECTION_ROOT ((USHORT) -1)\r |
35 | #define HIDP_LINK_COLLECTION_UNSPECIFIED ((USHORT) 0)\r |
36 | \r |
37 | \r |
38 | typedef enum _HIDP_REPORT_TYPE\r |
39 | {\r |
40 | HidP_Input,\r |
41 | HidP_Output,\r |
42 | HidP_Feature\r |
43 | } HIDP_REPORT_TYPE;\r |
44 | \r |
45 | typedef struct _USAGE_AND_PAGE\r |
46 | {\r |
47 | USAGE Usage;\r |
48 | USAGE UsagePage;\r |
49 | } USAGE_AND_PAGE, *PUSAGE_AND_PAGE;\r |
50 | \r |
51 | #define HidP_IsSameUsageAndPage(u1, u2) ((* (PULONG) &u1) == (* (PULONG) &u2))\r |
52 | \r |
53 | typedef struct _HIDP_BUTTON_CAPS\r |
54 | {\r |
55 | USAGE UsagePage;\r |
56 | UCHAR ReportID;\r |
57 | BOOLEAN IsAlias;\r |
58 | \r |
59 | USHORT BitField;\r |
60 | USHORT LinkCollection; // A unique internal index pointer\r |
61 | \r |
62 | USAGE LinkUsage;\r |
63 | USAGE LinkUsagePage;\r |
64 | \r |
65 | BOOLEAN IsRange;\r |
66 | BOOLEAN IsStringRange;\r |
67 | BOOLEAN IsDesignatorRange;\r |
68 | BOOLEAN IsAbsolute;\r |
69 | \r |
70 | ULONG Reserved[10];\r |
71 | union {\r |
72 | struct {\r |
73 | USAGE UsageMin, UsageMax;\r |
74 | USHORT StringMin, StringMax;\r |
75 | USHORT DesignatorMin, DesignatorMax;\r |
76 | USHORT DataIndexMin, DataIndexMax;\r |
77 | } Range;\r |
78 | struct {\r |
79 | USAGE Usage, Reserved1;\r |
80 | USHORT StringIndex, Reserved2;\r |
81 | USHORT DesignatorIndex, Reserved3;\r |
82 | USHORT DataIndex, Reserved4;\r |
83 | } NotRange;\r |
84 | };\r |
85 | \r |
86 | } HIDP_BUTTON_CAPS, *PHIDP_BUTTON_CAPS;\r |
87 | \r |
88 | \r |
89 | typedef struct _HIDP_VALUE_CAPS\r |
90 | {\r |
91 | USAGE UsagePage;\r |
92 | UCHAR ReportID;\r |
93 | BOOLEAN IsAlias;\r |
94 | \r |
95 | USHORT BitField;\r |
96 | USHORT LinkCollection; // A unique internal index pointer\r |
97 | \r |
98 | USAGE LinkUsage;\r |
99 | USAGE LinkUsagePage;\r |
100 | \r |
101 | BOOLEAN IsRange;\r |
102 | BOOLEAN IsStringRange;\r |
103 | BOOLEAN IsDesignatorRange;\r |
104 | BOOLEAN IsAbsolute;\r |
105 | \r |
106 | BOOLEAN HasNull; // Does this channel have a null report union\r |
107 | UCHAR Reserved;\r |
108 | USHORT BitSize; // How many bits are devoted to this value?\r |
109 | \r |
110 | USHORT ReportCount; // See Note below. Usually set to 1.\r |
111 | USHORT Reserved2[5];\r |
112 | \r |
113 | ULONG UnitsExp;\r |
114 | ULONG Units;\r |
115 | \r |
116 | LONG LogicalMin, LogicalMax;\r |
117 | LONG PhysicalMin, PhysicalMax;\r |
118 | \r |
119 | union {\r |
120 | struct {\r |
121 | USAGE UsageMin, UsageMax;\r |
122 | USHORT StringMin, StringMax;\r |
123 | USHORT DesignatorMin, DesignatorMax;\r |
124 | USHORT DataIndexMin, DataIndexMax;\r |
125 | } Range;\r |
126 | \r |
127 | struct {\r |
128 | USAGE Usage, Reserved1;\r |
129 | USHORT StringIndex, Reserved2;\r |
130 | USHORT DesignatorIndex, Reserved3;\r |
131 | USHORT DataIndex, Reserved4;\r |
132 | } NotRange;\r |
133 | };\r |
134 | } HIDP_VALUE_CAPS, *PHIDP_VALUE_CAPS;\r |
135 | \r |
136 | //\r |
137 | // Notes:\r |
138 | //\r |
139 | // ReportCount: When a report descriptor declares an Input, Output, or\r |
140 | // Feature main item with fewer usage declarations than the report count, then\r |
141 | // the last usage applies to all remaining unspecified count in that main item.\r |
142 | // (As an example you might have data that required many fields to describe,\r |
143 | // possibly buffered bytes.) In this case, only one value cap structure is\r |
144 | // allocated for these associtated fields, all with the same usage, and Report\r |
145 | // Count reflects the number of fields involved. Normally ReportCount is 1.\r |
146 | // To access all of the fields in such a value structure would require using\r |
147 | // HidP_GetUsageValueArray and HidP_SetUsageValueArray. HidP_GetUsageValue/\r |
148 | // HidP_SetScaledUsageValue will also work, however, these functions will only\r |
149 | // work with the first field of the structure.\r |
150 | //\r |
151 | \r |
152 | //\r |
153 | // The link collection tree consists of an array of LINK_COLLECTION_NODES\r |
154 | // where the index into this array is the same as the collection number.\r |
155 | //\r |
156 | // Given a collection A which contains a subcollection B, A is defined to be\r |
157 | // the parent B, and B is defined to be the child.\r |
158 | //\r |
159 | // Given collections A, B, and C where B and C are children of A, and B was\r |
160 | // encountered before C in the report descriptor, B is defined as a sibling of\r |
161 | // C. (This implies, of course, that if B is a sibling of C, then C is NOT a\r |
162 | // sibling of B).\r |
163 | //\r |
164 | // B is defined as the NextSibling of C if and only if there exists NO\r |
165 | // child collection of A, call it D, such that B is a sibling of D and D\r |
166 | // is a sibling of C.\r |
167 | //\r |
168 | // E is defined to be the FirstChild of A if and only if for all children of A,\r |
169 | // F, that are not equivalent to E, F is a sibling of E.\r |
170 | // (This implies, of course, that the does not exist a child of A, call it G,\r |
171 | // where E is a sibling of G). In other words the first sibling is the last\r |
172 | // link collection found in the list.\r |
173 | //\r |
174 | // In other words, if a collection B is defined within the definition of another\r |
175 | // collection A, B becomes a child of A. All collections with the same parent\r |
176 | // are considered siblings. The FirstChild of the parent collection, A, will be\r |
177 | // last collection defined that has A as a parent. The order of sibling pointers\r |
178 | // is similarly determined. When a collection B is defined, it becomes the\r |
179 | // FirstChild of it's parent collection. The previously defined FirstChild of the\r |
180 | // parent collection becomes the NextSibling of the new collection. As new\r |
181 | // collections with the same parent are discovered, the chain of sibling is built.\r |
182 | //\r |
183 | // With that in mind, the following describes conclusively a data structure\r |
184 | // that provides direct traversal up, down, and accross the link collection\r |
185 | // tree.\r |
186 | //\r |
187 | //\r |
188 | typedef struct _HIDP_LINK_COLLECTION_NODE\r |
189 | {\r |
190 | USAGE LinkUsage;\r |
191 | USAGE LinkUsagePage;\r |
192 | USHORT Parent;\r |
193 | USHORT NumberOfChildren;\r |
194 | USHORT NextSibling;\r |
195 | USHORT FirstChild;\r |
196 | ULONG CollectionType: 8; // As defined in 6.2.2.6 of HID spec\r |
197 | ULONG IsAlias : 1; // This link node is an allias of the next link node.\r |
198 | ULONG Reserved: 23;\r |
199 | PVOID UserContext; // The user can hang his coat here.\r |
200 | } HIDP_LINK_COLLECTION_NODE, *PHIDP_LINK_COLLECTION_NODE;\r |
201 | \r |
202 | //\r |
203 | // When a link collection is described by a delimiter, alias link collection\r |
204 | // nodes are created. (One for each usage within the delimiter).\r |
205 | // The parser assigns each capability description listed above only one\r |
206 | // link collection.\r |
207 | //\r |
208 | // If a control is defined within a collection defined by\r |
209 | // delimited usages, then that control is said to be within multiple link\r |
210 | // collections, one for each usage within the open and close delimiter tokens.\r |
211 | // Such multiple link collecions are said to be aliases. The first N-1 such\r |
212 | // collections, listed in the link collection node array, have their IsAlias\r |
213 | // bit set. The last such link collection is the link collection index used\r |
214 | // in the capabilities described above.\r |
215 | // Clients wishing to set a control in an aliased collection, should walk the\r |
216 | // collection array once for each time they see the IsAlias flag set, and use\r |
217 | // the last link collection as the index for the below accessor functions.\r |
218 | //\r |
219 | // NB: if IsAlias is set, then NextSibling should be one more than the current\r |
220 | // link collection node index.\r |
221 | //\r |
222 | \r |
223 | typedef PUCHAR PHIDP_REPORT_DESCRIPTOR;\r |
224 | typedef struct _HIDP_PREPARSED_DATA * PHIDP_PREPARSED_DATA;\r |
225 | \r |
226 | typedef struct _HIDP_CAPS\r |
227 | {\r |
228 | USAGE Usage;\r |
229 | USAGE UsagePage;\r |
230 | USHORT InputReportByteLength;\r |
231 | USHORT OutputReportByteLength;\r |
232 | USHORT FeatureReportByteLength;\r |
233 | USHORT Reserved[17];\r |
234 | \r |
235 | USHORT NumberLinkCollectionNodes;\r |
236 | \r |
237 | USHORT NumberInputButtonCaps;\r |
238 | USHORT NumberInputValueCaps;\r |
239 | USHORT NumberInputDataIndices;\r |
240 | \r |
241 | USHORT NumberOutputButtonCaps;\r |
242 | USHORT NumberOutputValueCaps;\r |
243 | USHORT NumberOutputDataIndices;\r |
244 | \r |
245 | USHORT NumberFeatureButtonCaps;\r |
246 | USHORT NumberFeatureValueCaps;\r |
247 | USHORT NumberFeatureDataIndices;\r |
248 | } HIDP_CAPS, *PHIDP_CAPS;\r |
249 | \r |
250 | typedef struct _HIDP_DATA\r |
251 | {\r |
252 | USHORT DataIndex;\r |
253 | USHORT Reserved;\r |
254 | union {\r |
255 | ULONG RawValue; // for values\r |
256 | BOOLEAN On; // for buttons MUST BE TRUE for buttons.\r |
257 | };\r |
258 | } HIDP_DATA, *PHIDP_DATA;\r |
259 | //\r |
260 | // The HIDP_DATA structure is used with HidP_GetData and HidP_SetData\r |
261 | // functions.\r |
262 | //\r |
263 | // The parser contiguously assigns every control (button or value) in a hid\r |
264 | // device a unique data index from zero to NumberXXXDataIndices -1 , inclusive.\r |
265 | // This value is found in the HIDP_BUTTON_CAPS and HIDP_VALUE_CAPS structures.\r |
266 | //\r |
267 | // Most clients will find the Get/Set Buttons / Value accessor functions\r |
268 | // sufficient to their needs, as they will allow the clients to access the\r |
269 | // data known to them while ignoring the other controls.\r |
270 | //\r |
271 | // More complex clients, which actually read the Button / Value Caps, and which\r |
272 | // do a value add service to these routines (EG Direct Input), will need to\r |
273 | // access all the data in the device without interest in the individual usage\r |
274 | // or link collection location. These are the clients that will find\r |
275 | // HidP_Data useful.\r |
276 | //\r |
277 | \r |
278 | typedef struct _HIDP_UNKNOWN_TOKEN\r |
279 | {\r |
280 | UCHAR Token;\r |
281 | UCHAR Reserved[3];\r |
282 | ULONG BitField;\r |
283 | } HIDP_UNKNOWN_TOKEN, *PHIDP_UNKNOWN_TOKEN;\r |
284 | \r |
285 | typedef struct _HIDP_EXTENDED_ATTRIBUTES\r |
286 | {\r |
287 | UCHAR NumGlobalUnknowns;\r |
288 | UCHAR Reserved [3];\r |
289 | PHIDP_UNKNOWN_TOKEN GlobalUnknowns;\r |
290 | // ... Additional attributes\r |
291 | ULONG Data [1]; // variableLength DO NOT ACCESS THIS FIELD\r |
292 | } HIDP_EXTENDED_ATTRIBUTES, *PHIDP_EXTENDED_ATTRIBUTES;\r |
293 | \r |
294 | NTSTATUS __stdcall\r |
295 | HidP_GetCaps (\r |
296 | IN PHIDP_PREPARSED_DATA PreparsedData,\r |
297 | OUT PHIDP_CAPS Capabilities\r |
298 | );\r |
299 | /*++\r |
300 | Routine Description:\r |
301 | Returns a list of capabilities of a given hid device as described by its\r |
302 | preparsed data.\r |
303 | \r |
304 | Arguments:\r |
305 | PreparsedData The preparsed data returned from HIDCLASS.\r |
306 | Capabilities a HIDP_CAPS structure\r |
307 | \r |
308 | Return Value:\r |
309 |