#include <linux/hid.h>
enum uhid_event_type {
- UHID_CREATE,
+ __UHID_LEGACY_CREATE,
UHID_DESTROY,
UHID_START,
UHID_STOP,
UHID_OPEN,
UHID_CLOSE,
UHID_OUTPUT,
- UHID_OUTPUT_EV, /* obsolete! */
- UHID_INPUT,
- UHID_FEATURE, /* obsolete! use UHID_GET_REPORT */
- UHID_GET_REPORT = UHID_FEATURE,
- UHID_FEATURE_ANSWER, /* obsolete! use UHID_GET_REPORT_REPLY */
- UHID_GET_REPORT_REPLY = UHID_FEATURE_ANSWER,
+ __UHID_LEGACY_OUTPUT_EV,
+ __UHID_LEGACY_INPUT,
+ UHID_GET_REPORT,
+ UHID_GET_REPORT_REPLY,
UHID_CREATE2,
UHID_INPUT2,
};
-struct uhid_create_req {
- __u8 name[128];
- __u8 phys[64];
- __u8 uniq[64];
- __u8 __user *rd_data;
- __u16 rd_size;
-
- __u16 bus;
- __u32 vendor;
- __u32 product;
- __u32 version;
- __u32 country;
-} __attribute__((__packed__));
-
struct uhid_create2_req {
__u8 name[128];
__u8 phys[64];
UHID_INPUT_REPORT,
};
-struct uhid_input_req {
+struct uhid_input2_req {
+ __u16 size;
+ __u8 data[UHID_DATA_MAX];
+} __attribute__((__packed__));
+
+struct uhid_output_req {
__u8 data[UHID_DATA_MAX];
__u16 size;
+ __u8 rtype;
} __attribute__((__packed__));
-struct uhid_input2_req {
+struct uhid_get_report_req {
+ __u32 id;
+ __u8 rnum;
+ __u8 rtype;
+} __attribute__((__packed__));
+
+struct uhid_get_report_reply_req {
+ __u32 id;
+ __u16 err;
__u16 size;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
-struct uhid_output_req {
+/*
+ * Compat Layer
+ * All these commands and requests are obsolete. You should avoid using them in
+ * new code. We support them for backwards-compatibility, but you might not get
+ * access to new feature in case you use them.
+ */
+
+enum uhid_legacy_event_type {
+ UHID_CREATE = __UHID_LEGACY_CREATE,
+ UHID_OUTPUT_EV = __UHID_LEGACY_OUTPUT_EV,
+ UHID_INPUT = __UHID_LEGACY_INPUT,
+ UHID_FEATURE = UHID_GET_REPORT,
+ UHID_FEATURE_ANSWER = UHID_GET_REPORT_REPLY,
+};
+
+/* Obsolete! Use UHID_CREATE2. */
+struct uhid_create_req {
+ __u8 name[128];
+ __u8 phys[64];
+ __u8 uniq[64];
+ __u8 __user *rd_data;
+ __u16 rd_size;
+
+ __u16 bus;
+ __u32 vendor;
+ __u32 product;
+ __u32 version;
+ __u32 country;
+} __attribute__((__packed__));
+
+/* Obsolete! Use UHID_INPUT2. */
+struct uhid_input_req {
__u8 data[UHID_DATA_MAX];
__u16 size;
- __u8 rtype;
} __attribute__((__packed__));
-/* Obsolete! Newer kernels will no longer send these events but instead convert
- * it into raw output reports via UHID_OUTPUT. */
+/* Obsolete! Kernel uses UHID_OUTPUT exclusively now. */
struct uhid_output_ev_req {
__u16 type;
__u16 code;
__u8 rtype;
} __attribute__((__packed__));
-struct uhid_get_report_req {
- __u32 id;
- __u8 rnum;
- __u8 rtype;
-} __attribute__((__packed__));
-
/* Obsolete! Use ABI compatible UHID_GET_REPORT_REPLY. */
struct uhid_feature_answer_req {
__u32 id;
__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));
-struct uhid_get_report_reply_req {
- __u32 id;
- __u16 err;
- __u16 size;
- __u8 data[UHID_DATA_MAX];
-} __attribute__((__packed__));
+/*
+ * UHID Events
+ * All UHID events from and to the kernel are encoded as "struct uhid_event".
+ * The "type" field contains a UHID_* type identifier. All payload depends on
+ * that type and can be accessed via ev->u.XYZ accordingly.
+ * If user-space writes short events, they're extended with 0s by the kernel. If
+ * the kernel writes short events, user-space shall extend them with 0s.
+ */
struct uhid_event {
__u32 type;