core: show webusb popup only in bootloader and only if firmware is not installed

core/embed/bootloader/main.c

@@ -50,8 +50,8 @@ static const uint8_t * const BOOTLOADER_KEYS[] = {
 
 #define USB_IFACE_NUM 0
 
-static void usb_init_all(void) {
+static void usb_init_all(secbool usb21_landing) {
-  static const usb_dev_info_t dev_info = {
+  usb_dev_info_t dev_info = {
       .device_class = 0x00,
       .device_subclass = 0x00,
       .device_protocol = 0x00,
@@ -63,7 +63,7 @@ static void usb_init_all(void) {
       .serial_number = "000000000000000000000000",
       .interface = "TREZOR Interface",
       .usb21_enabled = sectrue,
-      .usb21_landing = sectrue,
+      .usb21_landing = usb21_landing,
   };
 
   static uint8_t rx_buffer[USB_PACKET_SIZE];
@@ -88,7 +88,9 @@ static void usb_init_all(void) {
 
 static secbool bootloader_usb_loop(const vendor_header *const vhdr,
                                    const image_header *const hdr) {
-  usb_init_all();
+  // if both are NULL, we don't have a firmware installed
+  // let's show a webusb landing page in this case
+  usb_init_all((vhdr == NULL && hdr == NULL) ? sectrue : secfalse);
 
   uint8_t buf[USB_PACKET_SIZE];
 

core/src/usb.py

@@ -59,6 +59,7 @@ bus = io.USB(
     product="TREZOR",
     interface="TREZOR Interface",
     serial_number=get_device_id(),
+    usb21_landing=False,
 )
 bus.add(iface_wire)
 if __debug__:

core/tests/production_tests/main.py

@@ -18,6 +18,7 @@ usb = io.USB(
     manufacturer="SatoshiLabs",
     product="TREZOR",
     serial_number="000000000000000000000000",
+    usb21_landing=False,
 )
 
 usb.add(usb_vcp)