feat(usb_host): Create USB Host mock for CMock host tests

components/usb/usb_helpers.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -27,7 +27,7 @@ const usb_standard_desc_t *usb_parse_next_descriptor(const usb_standard_desc_t *
         return NULL;    // Next descriptor is out of bounds
     }
     // Return the next descriptor, update offset
-    const usb_standard_desc_t *ret_desc = (const usb_standard_desc_t *)(((uint32_t)cur_desc) + cur_desc->bLength);
+    const usb_standard_desc_t *ret_desc = (const usb_standard_desc_t *)(((uintptr_t)cur_desc) + cur_desc->bLength);
     *offset += cur_desc->bLength;
     return ret_desc;
 }

tools/mocks/usb/CMakeLists.txt

@@ -0,0 +1,18 @@
+# NOTE: This kind of mocking currently works on Linux targets only.
+#       On Espressif chips, too many dependencies are missing at the moment.
+message(STATUS "building USB HOST MOCKS")
+
+idf_component_get_property(original_usb_dir usb COMPONENT_OVERRIDEN_DIR)
+
+idf_component_mock(INCLUDE_DIRS "${original_usb_dir}/include"
+                                "${original_usb_dir}/include/esp_private"
+                                "${original_usb_dir}/include/usb"
+                                "${original_usb_dir}/private_include"
+                   MOCK_HEADER_FILES ${original_usb_dir}/include/usb/usb_host.h
+                                     ${original_usb_dir}/include/esp_private/usb_phy.h
+                   REQUIRES freertos)
+
+
+# We do not mock usb_helpers. We use the original implementation.
+# This way, we can test Class drivers descriptor parsing
+target_sources(${COMPONENT_LIB} PRIVATE "${original_usb_dir}/usb_helpers.c")

tools/mocks/usb/mock/mock_config.yaml

@@ -0,0 +1,7 @@
+:cmock:
+  :plugins:
+    - expect
+    - expect_any_args
+    - return_thru_ptr
+    - ignore
+    - ignore_arg