0.1.2

daemon/g910_device.h

@@ -1,4 +1,8 @@
-// gKeyMapper daemon - raw USB HID access to the keyboard's vendor interface.
+// gKeyMapper daemon - raw HID access to the keyboard's vendor interface.
+//
+// Uses the kernel's hidraw interface instead of libusb: hidraw provides
+// non-exclusive access, so other tools (OpenRGB, etc.) can talk to the same
+// device at the same time.  The kernel driver (usbhid) stays attached.
 #ifndef GKEYMAPPER_DAEMON_GKEY_DEVICE_H
 #define GKEYMAPPER_DAEMON_GKEY_DEVICE_H
 
@@ -6,9 +10,6 @@
 
 #include "device_tables.h"
 
-struct libusb_context;
-struct libusb_device_handle;
-
 namespace gkeymapper::daemon {
 
 class GKeyDevice {
@@ -19,15 +20,15 @@ public:
     GKeyDevice(const GKeyDevice&) = delete;
     GKeyDevice& operator=(const GKeyDevice&) = delete;
 
-    // Finds a supported keyboard, opens it and detaches the kernel driver from
-    // the vendor interface. Returns false (and logs) if none is found.
+    // Finds a supported keyboard and opens its hidraw node. Returns false (and
+    // logs) if none is found.
     //
     // `quiet` silences the "cannot use the keyboard" lines only, which the
     // hot-plug retry uses so an unplugged keyboard does not flood the journal
-    // with one line every retry; libusb-level failures always log.
+    // with one line every retry.
     bool open(bool quiet = false);
     void close();
-    bool is_open() const { return handle_ != nullptr; }
+    bool is_open() const { return fd_ >= 0; }
 
     // Sends the "stop mapping G-keys to F-keys" command if the model needs it.
     bool disable_binding();
@@ -39,14 +40,10 @@ public:
     const DeviceProfile* profile() const { return profile_; }
 
 private:
-    bool find_endpoint();
+    int find_hidraw_node(uint16_t vendor, uint16_t product);
 
-    libusb_context* context_ = nullptr;
-    libusb_device_handle* handle_ = nullptr;
+    int fd_ = -1;
     const DeviceProfile* profile_ = nullptr;
-    uint8_t endpoint_ = 0;
-    int claimed_interface_ = -1;
-    bool detached_kernel_driver_ = false;
 };
 
 } // namespace gkeymapper::daemon