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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2009-04-22 17:40:30 +0200
committerRalf Baechle <ralf@linux-mips.org>2009-06-17 12:06:25 +0200
commitea76f0b3759283ec3cc06c86e266bf0fa6a981d2 (patch)
tree36719ab69e7d94cc59c909526022219376807313 /arch/mips/include/asm/txx9
parentMIPS: TXx9: micro optimization for clocksource and clock_event (diff)
downloadlinux-ea76f0b3759283ec3cc06c86e266bf0fa6a981d2.tar.xz
linux-ea76f0b3759283ec3cc06c86e266bf0fa6a981d2.zip
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>
Diffstat (limited to 'arch/mips/include/asm/txx9')
-rw-r--r--arch/mips/include/asm/txx9/dmac.h48
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 */