Merge branch 'master'

[fw/altos] / src / samd21 / ao_dma_samd21.h

diff --git a/src/samd21/ao_dma_samd21.h b/src/samd21/ao_dma_samd21.h
new file mode 100644 (file)
index 0000000..57f5476
--- /dev/null
+++ b/src/samd21/ao_dma_samd21.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright © 2019 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _AO_DMA_SAM21_H_
+#define _AO_DMA_SAM21_H_
+
+void
+ao_dma_init(void);
+
+void
+_ao_dma_start_transfer(uint8_t         id,
+                      const void       *src,
+                      void             *dst,
+                      uint16_t         count,
+                      uint32_t         chctrlb,
+                      uint16_t         btctrl,
+                      void             (*callback)(uint8_t id, void *closure),
+                      void             *closure);
+
+void
+_ao_dma_done_transfer(uint8_t id);
+
+void
+ao_dma_dump(char *where);
+
+/*
+ * DMA is only used for SERCOM
+ */
+
+#define AO_SERCOM_DMA_BASE                     0U
+#define AO_SERCOM_INPUT_DMA_ID(id)             ((uint8_t) ((id) * 2U + 0U + AO_SERCOM_DMA_BASE))
+#define AO_SERCOM_OUTPUT_DMA_ID(id)            ((uint8_t) ((id) * 2U + 1U + AO_SERCOM_DMA_BASE))
+
+#endif /* _AO_DMA_SAM21_H_ */