Changes in uspace/lib/usb/src/request.c [ad4562c2:4723444] in mainline

File:

• uspace/lib/usb/src/request.c (modified) (3 diffs)

uspace/lib/usb/src/request.c

@@ -412 +412 @@
 }
 
+/** Retrieve full configuration descriptor, allocate space for it.
+ *
+ * The function takes care that full configuration descriptor is returned
+ * (i.e. the function will fail when less data then descriptor.totalLength
+ * is returned).
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] index Configuration index.
+ * @param[out] descriptor_ptr Where to store pointer to allocated buffer.
+ * @param[out] descriptor_size Where to store the size of the descriptor.
+ * @return Error code.
+ */
+int usb_request_get_full_configuration_descriptor_alloc(
+    usb_endpoint_pipe_t *pipe, int index,
+    void **descriptor_ptr, size_t *descriptor_size)
+{
+        int rc;
+
+        if (descriptor_ptr == NULL) {
+                return EBADMEM;
+        }
+
+        usb_standard_configuration_descriptor_t bare_config;
+        rc = usb_request_get_bare_configuration_descriptor(pipe, index,
+            &bare_config);
+        if (rc != EOK) {
+                return rc;
+        }
+
+        if (bare_config.descriptor_type != USB_DESCTYPE_CONFIGURATION) {
+                return ENOENT;
+        }
+        if (bare_config.total_length < sizeof(bare_config)) {
+                return ELIMIT;
+        }
+
+        void *buffer = malloc(bare_config.total_length);
+        if (buffer == NULL) {
+                return ENOMEM;
+        }
+
+        size_t transferred = 0;
+        rc = usb_request_get_full_configuration_descriptor(pipe, index,
+            buffer, bare_config.total_length, &transferred);
+        if (rc != EOK) {
+                free(buffer);
+                return rc;
+        }
+
+        if (transferred != bare_config.total_length) {
+                free(buffer);
+                return ELIMIT;
+        }
+
+        /* Everything looks okay, copy the pointers. */
+
+        *descriptor_ptr = buffer;
+
+        if (descriptor_size != NULL) {
+                *descriptor_size = bare_config.total_length;
+        }
+
+        return EOK;
+}
+
 /** Set configuration of USB device.
  *
@@ -504 +569 @@
  *
  * @param[in] pipe Control endpoint pipe (session must be already started).
- * @param[in] index String index (in native endianess).
+ * @param[in] index String index (in native endianess),
+ *      first index has number 1 (index from descriptors can be used directly).
  * @param[in] lang String language (in native endianess).
  * @param[out] string_ptr Where to store allocated string in native encoding.
@@ -515 +581 @@
                 return EBADMEM;
         }
-        /* Index is actually one byte value. */
-        if (index > 0xFF) {
+        /*
+         * Index is actually one byte value and zero index is used
+         * to retrieve list of supported languages.
+         */
+        if ((index < 1) || (index > 0xFF)) {
                 return ERANGE;
         }