1 files changed, 84 insertions, 0 deletions
diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h
new file mode 100644
index 000000000..ee13d5ca6
--- /dev/null
+++ b/include/linux/platform_data/edma.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *  TI EDMA definitions
+ *
+ *  Copyright (C) 2006-2013 Texas Instruments.
+ */
+
+/*
+ * This EDMA3 programming framework exposes two basic kinds of resource:
+ *
+ *  Channel	Triggers transfers, usually from a hardware event but
+ *		also manually or by "chaining" from DMA completions.
+ *		Each channel is coupled to a Parameter RAM (PaRAM) slot.
+ *
+ *  Slot	Each PaRAM slot holds a DMA transfer descriptor (PaRAM
+ *		"set"), source and destination addresses, a link to a
+ *		next PaRAM slot (if any), options for the transfer, and
+ *		instructions for updating those addresses.  There are
+ *		more than twice as many slots as event channels.
+ *
+ * Each PaRAM set describes a sequence of transfers, either for one large
+ * buffer or for several discontiguous smaller buffers.  An EDMA transfer
+ * is driven only from a channel, which performs the transfers specified
+ * in its PaRAM slot until there are no more transfers.  When that last
+ * transfer completes, the "link" field may be used to reload the channel's
+ * PaRAM slot with a new transfer descriptor.
+ *
+ * The EDMA Channel Controller (CC) maps requests from channels into physical
+ * Transfer Controller (TC) requests when the channel triggers (by hardware
+ * or software events, or by chaining).  The two physical DMA channels provided
+ * by the TCs are thus shared by many logical channels.
+ *
+ * DaVinci hardware also has a "QDMA" mechanism which is not currently
+ * supported through this interface.  (DSP firmware uses it though.)
+ */
+
+#ifndef EDMA_H_
+#define EDMA_H_
+
+enum dma_event_q {
+	EVENTQ_0 = 0,
+	EVENTQ_1 = 1,
+	EVENTQ_2 = 2,
+	EVENTQ_3 = 3,
+	EVENTQ_DEFAULT = -1
+};
+
+#define EDMA_CTLR_CHAN(ctlr, chan)	(((ctlr) << 16) | (chan))
+#define EDMA_CTLR(i)			((i) >> 16)
+#define EDMA_CHAN_SLOT(i)		((i) & 0xffff)
+
+#define EDMA_FILTER_PARAM(ctlr, chan)	((int[]) { EDMA_CTLR_CHAN(ctlr, chan) })
+
+struct edma_rsv_info {
+
+	const s16	(*rsv_chans)[2];
+	const s16	(*rsv_slots)[2];
+};
+
+struct dma_slave_map;
+
+/* platform_data for EDMA driver */
+struct edma_soc_info {
+	/*
+	 * Default queue is expected to be a low-priority queue.
+	 * This way, long transfers on the default queue started
+	 * by the codec engine will not cause audio defects.
+	 */
+	enum dma_event_q	default_queue;
+
+	/* Resource reservation for other cores */
+	struct edma_rsv_info	*rsv;
+
+	/* List of channels allocated for memcpy, terminated with -1 */
+	s32			*memcpy_channels;
+
+	s8	(*queue_priority_mapping)[2];
+	const s16	(*xbar_chans)[2];
+
+	const struct dma_slave_map *slave_map;
+	int slavecnt;
+};
+
+#endif