Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx>
Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx>
---
include/linux/platform_data/dma-st_fdma.h | 72 +++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
create mode 100644 include/linux/platform_data/dma-st_fdma.h
diff --git a/include/linux/platform_data/dma-st_fdma.h b/include/linux/platform_data/dma-st_fdma.h
new file mode 100644
index 0000000..ea2523b
--- /dev/null
+++ b/include/linux/platform_data/dma-st_fdma.h
@@ -0,0 +1,72 @@
+/*
+ * dma-st-fdma.h
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ * Author: Ludovic Barre <Ludovic.barre@xxxxxx>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+#ifndef __PLAT_ST_FDMA_H
+#define __PLAT_ST_FDMA_H
+
+#include <linux/dmaengine.h>
+
+/*
+ * Channel type
+ */
+enum st_fdma_type {
+ ST_FDMA_TYPE_FREE_RUN,
+ ST_FDMA_TYPE_PACED,
+};
+
+struct st_fdma_cfg {
+ struct device_node *of_node;
+ enum st_fdma_type type;
+ dma_addr_t dev_addr;
+ enum dma_transfer_direction dir;
+ int req_line; /* request line */
+ u32 req_ctrl; /* Request control */
+};
+
+#define FW_NAME_SIZE 30
+
+/**
+ * struct st_fdma_platform_data - platform specific data for FDMA engine
+ *
+ * @nr_channels: Number of channels supported by hardware
+ * @fw_name: The firmware name
+ */
+struct st_fdma_platform_data {
+ u32 nr_channels;
+ u32 id;
+ char fw_name[FW_NAME_SIZE];
+};
+
+/*
+ * request control bits
+ */
+#define REQ_CTRL_NUM_OPS_MASK GENMASK(31, 24)
+#define REQ_CTRL_NUM_OPS(n) (REQ_CTRL_NUM_OPS_MASK & ((n) << 24))
+#define REQ_CTRL_INITIATOR_MASK BIT(22)
+#define REQ_CTRL_INIT0 (0x0 << 22)
+#define REQ_CTRL_INIT1 (0x1 << 22)
+#define REQ_CTRL_INC_ADDR_ON BIT(21)
+#define REQ_CTRL_DATA_SWAP_ON BIT(17)
+#define REQ_CTRL_WNR BIT(14)
+#define REQ_CTRL_OPCODE_MASK GENMASK(7, 4)
+#define REQ_CTRL_OPCODE_LD_ST1 (0x0 << 4)
+#define REQ_CTRL_OPCODE_LD_ST2 (0x1 << 4)
+#define REQ_CTRL_OPCODE_LD_ST4 (0x2 << 4)
+#define REQ_CTRL_OPCODE_LD_ST8 (0x3 << 4)
+#define REQ_CTRL_OPCODE_LD_ST16 (0x4 << 4)
+#define REQ_CTRL_OPCODE_LD_ST32 (0x5 << 4)
+#define REQ_CTRL_OPCODE_LD_ST64 (0x6 << 4)
+#define REQ_CTRL_HOLDOFF_MASK GENMASK(2, 0)
+#define REQ_CTRL_HOLDOFF(n) ((n) & REQ_CTRL_HOLDOFF_MASK)
+
+/* bits used by client to configure request control */
+#define REQ_CTRL_CFG_MASK (REQ_CTRL_HOLDOFF_MASK | REQ_CTRL_DATA_SWAP_ON \
+ | REQ_CTRL_INC_ADDR_ON | REQ_CTRL_INITIATOR_MASK)
+
+bool st_fdma_filter_fn(struct dma_chan *chan, void *param);
+
+#endif /* __PLAT_ST_FDMA_H */
--
1.9.1
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