+/*
+ * Copyright (c) 2019 Tilman Sauerbeck (tilman at code-monkey de)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdint.h>
+
+static const uint32_t FTFA_FSTAT = 0x40020000;
+
+static const uint8_t FTFA_FSTAT_CCIF = 1 << 7;
+
+__attribute__((section(".data")))
+static uint8_t
+run_command(void)
+{
+ volatile uint8_t *fstat = (uint8_t *) FTFA_FSTAT;
+
+ /* Start command. */
+ *fstat = FTFA_FSTAT_CCIF;
+
+ /* Wait for it to finish. */
+ for (;;) {
+ uint8_t v = *fstat;
+
+ if ((v & FTFA_FSTAT_CCIF) != 0) {
+ return v;
+ }
+ }
+}
+
+uint8_t
+flash_run_command(void)
+{
+ asm volatile ("cpsid i");
+
+ uint8_t status = run_command();
+
+ asm volatile ("cpsie i");
+
+ return status;
+}