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mmc: sunxi: Add driver for SD/MMC hosts found on Allwinner sunxi SoCs

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The Allwinner sunxi mmc host uses dma in bus-master mode using a built-in
designware idmac controller, which is identical to the one found in the mmc-dw
hosts. However the rest of the host is not identical to mmc-dw, it deals with
sending stop commands in hardware which makes it significantly different
from the mmc-dw devices.

Signed-off-by: David Lanzendörfer <david.lanzendoerfer@o2s.ch>
[hdegoede@redhat.com: various cleanups and fixes]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Chris Ball <chris@printf.net>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
David Lanzendörfer 2014-05-12 14:04:48 +02:00 • committed by Mike Turquette
parent 1cdf8ee2f8
commit 3cbcb16095
4 changed files with 1100 additions and 0 deletions
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43
Documentation/devicetree/bindings/mmc/sunxi-mmc.txt Normal file
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@ -0,0 +1,43 @@
* Allwinner sunxi MMC controller
The highspeed MMC host controller on Allwinner SoCs provides an interface
for MMC, SD and SDIO types of memory cards.
Supported maximum speeds are the ones of the eMMC standard 4.5 as well
as the speed of SD standard 3.0.
Absolute maximum transfer rate is 200MB/s
Required properties:
- compatible : "allwinner,sun4i-a10-mmc" or "allwinner,sun5i-a13-mmc"
- reg : mmc controller base registers
- clocks : a list with 2 phandle + clock specifier pairs
- clock-names : must contain "ahb" and "mmc"
- interrupts : mmc controller interrupt
Optional properties:
- resets : phandle + reset specifier pair
- reset-names : must contain "ahb"
- for cd, bus-width and additional generic mmc parameters
please refer to mmc.txt within this directory
Examples:
- Within .dtsi:
mmc0: mmc@01c0f000 {
compatible = "allwinner,sun5i-a13-mmc";
reg = <0x01c0f000 0x1000>;
clocks = <&ahb_gates 8>, <&mmc0_clk>;
clock-names = "ahb", "mod";
interrupts = <0 32 4>;
status = "disabled";
};
- Within dts:
mmc0: mmc@01c0f000 {
pinctrl-names = "default", "default";
pinctrl-0 = <&mmc0_pins_a>;
pinctrl-1 = <&mmc0_cd_pin_reference_design>;
bus-width = <4>;
cd-gpios = <&pio 7 1 0>; /* PH1 */
cd-inverted;
status = "okay";
};

7
drivers/mmc/host/Kconfig
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@ -694,3 +694,10 @@ config MMC_REALTEK_PCI
help help
Say Y here to include driver code to support SD/MMC card interface Say Y here to include driver code to support SD/MMC card interface
of Realtek PCI-E card reader of Realtek PCI-E card reader
config MMC_SUNXI
tristate "Allwinner sunxi SD/MMC Host Controller support"
depends on ARCH_SUNXI
help
This selects support for the SD/MMC Host Controller on
Allwinner sunxi SoCs.

1
drivers/mmc/host/Makefile
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@ -50,6 +50,7 @@ obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
obj-$(CONFIG_MMC_VUB300) += vub300.o obj-$(CONFIG_MMC_VUB300) += vub300.o
obj-$(CONFIG_MMC_USHC) += ushc.o obj-$(CONFIG_MMC_USHC) += ushc.o
obj-$(CONFIG_MMC_WMT) += wmt-sdmmc.o obj-$(CONFIG_MMC_WMT) += wmt-sdmmc.o
obj-$(CONFIG_MMC_SUNXI) += sunxi-mmc.o
obj-$(CONFIG_MMC_REALTEK_PCI) += rtsx_pci_sdmmc.o obj-$(CONFIG_MMC_REALTEK_PCI) += rtsx_pci_sdmmc.o

1049
drivers/mmc/host/sunxi-mmc.c Normal file
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