DMA: TXx9 Soc DMA Controller driver

This patch adds support for the integrated DMAC of the TXx9 family.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/arch/mips/include/asm/txx9/dmac.h b/arch/mips/include/asm/txx9/dmac.h
new file mode 100644
index 000000000000..a87d1c3e4f5b
--- /dev/null
+++ b/arch/mips/include/asm/txx9/dmac.h
@@ -0,0 +1,48 @@
+/*
+ * TXx9 SoC DMA Controller
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_TXX9_DMAC_H
+#define __ASM_TXX9_DMAC_H
+
+#include <linux/dmaengine.h>
+
+#define TXX9_DMA_MAX_NR_CHANNELS	4
+
+/**
+ * struct txx9dmac_platform_data - Controller configuration parameters
+ * @memcpy_chan: Channel used for DMA_MEMCPY
+ * @have_64bit_regs: DMAC have 64 bit registers
+ */
+struct txx9dmac_platform_data {
+	int	memcpy_chan;
+	bool	have_64bit_regs;
+};
+
+/**
+ * struct txx9dmac_chan_platform_data - Channel configuration parameters
+ * @dmac_dev: A platform device for DMAC
+ */
+struct txx9dmac_chan_platform_data {
+	struct platform_device *dmac_dev;
+};
+
+/**
+ * struct txx9dmac_slave - Controller-specific information about a slave
+ * @tx_reg: physical address of data register used for
+ *	memory-to-peripheral transfers
+ * @rx_reg: physical address of data register used for
+ *	peripheral-to-memory transfers
+ * @reg_width: peripheral register width
+ */
+struct txx9dmac_slave {
+	u64		tx_reg;
+	u64		rx_reg;
+	unsigned int	reg_width;
+};
+
+#endif /* __ASM_TXX9_DMAC_H */