From 7c530e39d3f61761f4f5b97b4f61c83773151413 Mon Sep 17 00:00:00 2001 From: Peter Wu Date: Sun, 23 Mar 2014 17:00:54 +0100 Subject: unifying: interface with HID++ 2.0 features Prepare for adding more HID++ 2.0 features. --- hw/usb/hid-logitech-hidpp20.c | 73 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 hw/usb/hid-logitech-hidpp20.c (limited to 'hw/usb/hid-logitech-hidpp20.c') 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 + * + * 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; +} -- cgit v1.2.1