Add hooks to allow cloning an attached USB device descriptor

Author: rppicomidi

src/device/usbd_control.c

@@ -56,7 +56,7 @@ typedef struct
 static usbd_control_xfer_t _ctrl_xfer;
 
 CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN
-static uint8_t _usbd_ctrl_buf[CFG_TUD_ENDPOINT0_SIZE];
+static uint8_t _usbd_ctrl_buf[/*CFG_TUD_ENDPOINT0_SIZE*/ 64];
 
 //--------------------------------------------------------------------+
 // Application API

src/host/usbh.c

@@ -1323,7 +1323,7 @@ static void process_enumeration(tuh_xfer_t* xfer)
       dev->i_product      = desc_device->iProduct;
       dev->i_serial       = desc_device->iSerialNumber;
 
-    //  if (tuh_attach_cb) tuh_attach_cb((tusb_desc_device_t*) _usbh_ctrl_buf);
+      if (tuh_desc_device_cb) tuh_desc_device_cb(daddr, (tusb_desc_device_t const*) _usbh_ctrl_buf);
 
       // Get 9-byte for total length
       uint8_t const config_idx = CONFIG_NUM - 1;
@@ -1350,9 +1350,12 @@ static void process_enumeration(tuh_xfer_t* xfer)
     break;
 
     case ENUM_SET_CONFIG:
+      // Got the whole configuration descriptor. Make a copy
+      if (tuh_desc_config_cb) tuh_desc_config_cb(daddr, (const tusb_desc_configuration_t*) _usbh_ctrl_buf);
+
       // Parse configuration & set up drivers
       // Driver open aren't allowed to make any usb transfer yet
-      TU_ASSERT( _parse_configuration_descriptor(daddr, (tusb_desc_configuration_t*) _usbh_ctrl_buf), );
+      TU_ASSERT( _parse_configuration_descriptor(daddr, (const tusb_desc_configuration_t*  ) _usbh_ctrl_buf), );
 
       TU_ASSERT( tuh_configuration_set(daddr, CONFIG_NUM, process_enumeration, ENUM_CONFIG_DRIVER), );
     break;

src/host/usbh.h

@@ -78,7 +78,11 @@ enum
 // APPLICATION CALLBACK
 //--------------------------------------------------------------------+
 
-//TU_ATTR_WEAK uint8_t tuh_attach_cb (tusb_desc_device_t const *desc_device);
+// Give the application an opportunity to grab the device descriptor
+TU_ATTR_WEAK void tuh_desc_device_cb(uint8_t daddr, const tusb_desc_device_t *desc_device);
+
+// Give the application an opportunity to grab the configuration descriptor
+TU_ATTR_WEAK void tuh_desc_config_cb(uint8_t daddr, const tusb_desc_configuration_t *desc_config);
 
 // Invoked when device is mounted (configured)
 TU_ATTR_WEAK void tuh_mount_cb (uint8_t daddr);

src/tusb_option.h

@@ -421,9 +421,9 @@ typedef int make_iso_compilers_happy;
 //------------------------------------------------------------------
 // Configuration Validation
 //------------------------------------------------------------------
-#if CFG_TUD_ENDPOINT0_SIZE > 64
-  #error Control Endpoint Max Packet Size cannot be larger than 64
-#endif
+//#if CFG_TUD_ENDPOINT0_SIZE > 64
+//  #error Control Endpoint Max Packet Size cannot be larger than 64
+//#endif
 
 #endif /* _TUSB_OPTION_H_ */