Synopsys DesignWare mobile storage host controller supports three types of transfer mode: pio, internal dma and external dma. However, dw_mmc can only supports pio and internal dma now. Thus some platforms using dw-mshc integrated with generic dma can't work in dma mode. So we submit this patch to achieve it. And the config option, CONFIG_MMC_DW_IDMAC, was added by Will Newton (commit:f95f3850) for the first version of dw_mmc and never be touched from then. At that time dt-bindings hadn't been introduced into dw_mmc yet means we should select CONFIG_MMC_DW_IDMAC to enable internal dma mode at compile time. Nowadays, device-tree helps us to support a variety of boards with one kernel. That's why we need to remove it and decide the transfer mode at runtime. This RFC patch needs lots of ACKs. I know it's hard, but it does need someone to make the running. Patch does the following things: - remove CONFIG_MMC_DW_IDMAC config option - add bindings for idmac and edmac used by synopsys-dw-mshc at runtime - add edmac support for synopsys-dw-mshc Patch is based on next of git://git.linaro.org/people/ulf.hansson/mmc Changes in v3: - choose transfer mode at runtime - remove all CONFIG_MMC_DW_IDMAC config option - add supports-idmac property for some platforms Changes in v2: - Fix typo of dev_info msg - remove unused dmach from declaration of dw_mci_dma_slave Shawn Lin (5): mmc: dw_mmc: Add external dma interface support Documentation: synopsys-dw-mshc: add bindings for idmac and edmac arm: configs: remove CONFIG_MMC_DW_IDMAC mips: configs: remove CONFIG_MMC_DW_IDMAC ARM: dts: add supports-idmac property .../devicetree/bindings/mmc/synopsys-dw-mshc.txt | 41 +++ arch/arc/configs/axs101_defconfig | 1 - arch/arc/configs/axs103_defconfig | 1 - arch/arc/configs/axs103_smp_defconfig | 1 - arch/arm/boot/dts/exynos3250-monk.dts | 1 + arch/arm/boot/dts/exynos3250-rinato.dts | 1 + arch/arm/boot/dts/exynos4412-odroid-common.dtsi | 1 + arch/arm/boot/dts/exynos4412-origen.dts | 1 + arch/arm/boot/dts/exynos4412-trats2.dts | 1 + arch/arm/boot/dts/exynos4x12.dtsi | 1 + arch/arm/boot/dts/exynos5250-arndale.dts | 2 + arch/arm/boot/dts/exynos5250-smdk5250.dts | 2 + arch/arm/boot/dts/exynos5250-snow.dts | 3 + arch/arm/boot/dts/exynos5250-spring.dts | 2 + arch/arm/boot/dts/exynos5260-xyref5260.dts | 2 + arch/arm/boot/dts/exynos5410-smdk5410.dts | 2 + arch/arm/boot/dts/exynos5420-arndale-octa.dts | 2 + arch/arm/boot/dts/exynos5420-peach-pit.dts | 3 + arch/arm/boot/dts/exynos5420-smdk5420.dts | 2 + arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 2 + arch/arm/boot/dts/exynos5800-peach-pi.dts | 3 + arch/arm/boot/dts/hisi-x5hd2.dtsi | 2 + arch/arm/boot/dts/rk3288-evb.dtsi | 2 + arch/arm/boot/dts/rk3288-firefly.dtsi | 3 + arch/arm/boot/dts/rk3288-popmetal.dts | 2 + arch/arm/configs/exynos_defconfig | 1 - arch/arm/configs/hisi_defconfig | 1 - arch/arm/configs/lpc18xx_defconfig | 1 - arch/arm/configs/multi_v7_defconfig | 1 - arch/arm/configs/zx_defconfig | 1 - arch/arm64/boot/dts/exynos/exynos7-espresso.dts | 2 + arch/mips/configs/pistachio_defconfig | 1 - drivers/mmc/host/Kconfig | 11 +- drivers/mmc/host/dw_mmc-pltfm.c | 2 + drivers/mmc/host/dw_mmc.c | 277 +++++++++++++++++---- include/linux/mmc/dw_mmc.h | 28 ++- 36 files changed, 338 insertions(+), 72 deletions(-) -- 2.3.7
