feat: adds webusb

tmk_core/protocol/lufa/lufa.c

@@ -268,6 +268,65 @@ static void Console_Task(void) {
 }
 #endif
 
+#ifdef WEBUSB_ENABLE
+void webusb_send(uint8_t *data, uint8_t length) {
+    if (USB_DeviceState != DEVICE_STATE_Configured) {
+        return;
+    }
+
+    Endpoint_SelectEndpoint(WEBUSB_IN_EPNUM);
+
+    if (Endpoint_IsINReady()) {
+        Endpoint_Write_Stream_LE(data, length, NULL);
+        Endpoint_ClearIN();
+    }
+}
+
+__attribute__((weak)) void webusb_receive(uint8_t *data, uint8_t length) { }
+
+static void webusb_task(void) {
+    // Create a temporary buffer to hold the read in data from the host
+    uint8_t data[WEBUSB_EPSIZE];
+    bool    data_read = false;
+
+    // Device must be connected and configured for the task to run
+    if (USB_DeviceState != DEVICE_STATE_Configured) return;
+
+    Endpoint_SelectEndpoint(WEBUSB_OUT_EPNUM);
+
+    // Check to see if a packet has been sent from the host
+    if (Endpoint_IsOUTReceived()) {
+        // Check to see if the packet contains data
+        if (Endpoint_IsReadWriteAllowed()) {
+            /* Read data */
+            Endpoint_Read_Stream_LE(data, sizeof(data), NULL);
+            data_read = true;
+        }
+
+        // Finalize the stream transfer to receive the last packet
+        Endpoint_ClearOUT();
+
+        if (data_read) {
+            webusb_receive(data, sizeof(data));
+        }
+    }
+}
+
+/** Microsoft OS 2.0 Descriptor. This is used by Windows to select the USB driver for the device.
+ *
+ *  For WebUSB in Chrome, the correct driver is WinUSB, which is selected via CompatibleID.
+ *
+ *  Additionally, while Chrome is built using libusb, a magic registry key needs to be set containing a GUID for
+ *  the device.
+ */
+const MS_OS_20_Descriptor_t PROGMEM MS_OS_20_Descriptor = MS_OS_20_DESCRIPTOR;
+
+/** URL descriptor string. This is a UTF-8 string containing a URL excluding the prefix. At least one of these must be
+ * 	defined and returned when the Landing Page descriptor index is requested.
+ */
+const WebUSB_URL_Descriptor_t PROGMEM WebUSB_LandingPage = WEBUSB_URL_DESCRIPTOR(WEBUSB_LANDING_PAGE_URL);
+#endif
+
 /*******************************************************************************
  * USB Events
  ******************************************************************************/
@@ -405,6 +464,12 @@ void EVENT_USB_Device_ConfigurationChanged(void) {
 #    endif
 #endif
 
+#ifdef WEBUSB_ENABLE
+  /* Setup Webusb Endpoints */
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(WEBUSB_IN_EPADDR, EP_TYPE_INTERRUPT, WEBUSB_EPSIZE, 1);
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(WEBUSB_OUT_EPADDR, EP_TYPE_INTERRUPT, WEBUSB_EPSIZE, 1);
+#endif
+
 #ifdef MIDI_ENABLE
     ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, ENDPOINT_BANK_SINGLE);
     ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, ENDPOINT_BANK_SINGLE);
@@ -536,6 +601,48 @@ void EVENT_USB_Device_ControlRequest(void) {
             }
 
             break;
+#ifdef WEBUSB_ENABLE
+        case WEBUSB_VENDOR_CODE:
+            if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_VENDOR | REQREC_DEVICE)) {
+                switch (USB_ControlRequest.wIndex) {
+                  case WebUSB_RTYPE_GetURL:
+                    switch (USB_ControlRequest.wValue) {
+                      case WEBUSB_LANDING_PAGE_INDEX:
+                        Endpoint_ClearSETUP();
+                        /* Write the descriptor data to the control endpoint */
+                        Endpoint_Write_Control_PStream_LE(&WebUSB_LandingPage, WebUSB_LandingPage.Header.Size);
+                        /* Release the endpoint after transaction. */
+                        Endpoint_ClearStatusStage();
+                        break;
+                      default: /* Stall transfer on invalid index. */
+                        Endpoint_StallTransaction();
+                        break;
+                    }
+                    break;
+                  default: /* Stall on unknown WebUSB request */
+                    Endpoint_StallTransaction();
+                    break;
+                }
+            }
+
+            break;
+        case MS_OS_20_VENDOR_CODE:
+            if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_VENDOR | REQREC_DEVICE)) {
+                switch (USB_ControlRequest.wIndex) {
+                  case MS_OS_20_DESCRIPTOR_INDEX:
+                    Endpoint_ClearSETUP();
+                    /* Write the descriptor data to the control endpoint */
+                    Endpoint_Write_Control_PStream_LE(&MS_OS_20_Descriptor, MS_OS_20_Descriptor.Header.TotalLength);
+                    /* Release the endpoint after transaction. */
+                    Endpoint_ClearStatusStage();
+                    break;
+                  default: /* Stall on unknown MS OS 2.0 request */
+                    Endpoint_StallTransaction();
+                    break;
+                }
+            }
+            break;
+#endif
     }
 
 #ifdef VIRTSER_ENABLE
@@ -1018,6 +1125,10 @@ int main(void) {
         raw_hid_task();
 #endif
 
+#ifdef WEBUSB_ENABLE
+        webusb_task();
+#endif
+
 #if !defined(INTERRUPT_CONTROL_ENDPOINT)
         USB_USBTask();
 #endif