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dmaengine: rcar-dmac: Add Renesas R-Car Gen2 DMA Controller (DMAC) driver

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The DMAC is a general purpose multi-channel DMA controller that supports
both slave and memcpy transfers.

The driver currently supports the DMAC found in the r8a7790 and r8a7791
SoCs. Support for compatible DMA controllers (such as the audio DMAC)
will be added later.

Feature-wise, automatic hardware handling of descriptors chains isn't
supported yet. LPAE support is implemented.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Laurent Pinchart 2014-07-09 00:42:19 +02:00
parent c4d7635280
commit 87244fe5ab
4 changed files with 1518 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/dma/Makefile
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@ -19,7 +19,7 @@ obj-$(CONFIG_AT_HDMAC) += at_hdmac.o
obj-$(CONFIG_AT_XDMAC) += at_xdmac.o
obj-$(CONFIG_MX3_IPU) += ipu/
obj-$(CONFIG_TXX9_DMAC) += txx9dmac.o
obj-$(CONFIG_SH_DMAE_BASE) += sh/
obj-$(CONFIG_RENESAS_DMA) += sh/
obj-$(CONFIG_COH901318) += coh901318.o coh901318_lli.o
obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/
obj-$(CONFIG_IMX_SDMA) += imx-sdma.o

14
drivers/dma/sh/Kconfig
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@ -2,6 +2,10 @@
# DMA engine configuration for sh
#
config RENESAS_DMA
bool
select DMA_ENGINE
#
# DMA Engine Helpers
#
@ -12,7 +16,7 @@ config SH_DMAE_BASE
depends on !SUPERH || SH_DMA
depends on !SH_DMA_API
default y
select DMA_ENGINE
select RENESAS_DMA
help
Enable support for the Renesas SuperH DMA controllers.
@ -52,3 +56,11 @@ config RCAR_AUDMAC_PP
depends on SH_DMAE_BASE
help
Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.
config RCAR_DMAC
tristate "Renesas R-Car Gen2 DMA Controller"
depends on ARCH_SHMOBILE || COMPILE_TEST
select RENESAS_DMA
help
This driver supports the general purpose DMA controller found in the
Renesas R-Car second generation SoCs.

1
drivers/dma/sh/Makefile
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@ -16,3 +16,4 @@ obj-$(CONFIG_SH_DMAE) += shdma.o
obj-$(CONFIG_SUDMAC) += sudmac.o
obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o
obj-$(CONFIG_RCAR_AUDMAC_PP) += rcar-audmapp.o
obj-$(CONFIG_RCAR_DMAC) += rcar-dmac.o

1503
drivers/dma/sh/rcar-dmac.c Normal file
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