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Diffstat (limited to 'hw/usb/hid-logitech-hidpp20.c')
-rw-r--r--hw/usb/hid-logitech-hidpp20.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/hw/usb/hid-logitech-hidpp20.c b/hw/usb/hid-logitech-hidpp20.c
new file mode 100644
index 0000000000..371eaa6bdd
--- /dev/null
+++ b/hw/usb/hid-logitech-hidpp20.c
@@ -0,0 +1,73 @@
+/*
+ * Logitech Unifying receiver emulation (HID++ 2.0 features).
+ *
+ * Copyright (c) 2014 Peter Wu <peter@lekensteyn.nl>
+ *
+ * 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.
+ */
+#include "hw/hw.h"
+#include "ui/console.h"
+#include "hw/usb.h"
+#include "dump.h"
+#include "hw/input/hid.h"
+#include "hw/usb/hid-logitech-dj.h"
+
+/* hd - subject device; msg - input/output msg; fn - Function ID; params -
+ * function parameters (in/out).
+ * If the return value is negative, an error report must be returned. If 0, then
+ * no output report must be generated. Higher values signify the number of
+ * parameters that must not be cleared when outputting a response */
+typedef int (*hidpp_feature_cb_t)(LHidDevice *hd, Hidpp20Msg *msg,
+ uint8_t fn, uint8_t *params);
+struct HidppFeature {
+ uint16_t id;
+#define HIDPP20_FEAT_TYPE_OBSOLETE (1 << 7)
+#define HIDPP20_FEAT_TYPE_HIDDEN (1 << 6)
+#define HIDPP20_FEAT_TYPE_INTERNAL (1 << 5)
+ uint8_t type;
+ hidpp_feature_cb_t callback;
+};
+
+void hidpp20_init_features(LHidDevice *hd) {
+ switch (hd->info.wireless_pid) {
+ }
+}
+
+int hidpp20_feature_call(LHidDevice *hd, Hidpp20Msg *func)
+{
+ uint8_t fn = func->func >> 4;
+ const HidppFeature *feat;
+ int r;
+
+ if (func->feat_index > hd->info.features_count) {
+ return -HIDPP20_ERR_CODE_INVALID_FEATURE_INDEX;
+ }
+
+ assert(hd->info.features != NULL);
+
+ feat = &hd->info.features[func->feat_index - 1];
+ r = feat->callback(hd, func, fn, func->params);
+ if (r > 0) {
+ // r are the parameters that must be kept, the others are cleared.
+ assert(r <= sizeof(func->params));
+ memset(func->params + r, 0, sizeof(func->params) - r);
+ }
+
+ return r;
+}