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mmc: Add new VUB300 USB-to-SD/SDIO/MMC driver

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Add a driver for Elan Digital System's VUB300 chip which is a USB
connected SDIO/SDmem/MMC host controller.  A VUB300 chip enables a USB 2.0
or USB 1.1 connected host computer to use SDIO/SD/MMC cards without the
need for a directly connected, for example via PCI, SDIO host controller.

Signed-off-by: Anthony F Olech <tony.olech@elandigitalsystems.com>
[cjb: various punctuation and style fixes]
Tested-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Tony Olech 2011-05-14 16:48:13 -04:00 committed by Chris Ball
parent 73627f7ce1
commit 88095e7b47
4 changed files with 2545 additions and 0 deletions
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7
MAINTAINERS
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@ -6778,6 +6778,13 @@ L: lm-sensors@lm-sensors.org
S: Maintained
F: drivers/hwmon/vt8231.c
VUB300 USB to SDIO/SD/MMC bridge chip
M: Tony Olech <tony.olech@elandigitalsystems.com>
L: linux-mmc@vger.kernel.org
L: linux-usb@vger.kernel.org
S: Supported
F: drivers/mmc/host/vub300.c
W1 DALLAS'S 1-WIRE BUS
M: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
S: Maintained

31
drivers/mmc/host/Kconfig
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@ -535,6 +535,37 @@ config MMC_JZ4740
If you have a board based on such a SoC and with a SD/MMC slot,
say Y or M here.
config MMC_VUB300
tristate "VUB300 USB to SDIO/SD/MMC Host Controller support"
depends on USB
help
This selects support for Elan Digital Systems' VUB300 chip.
The VUB300 is a USB-SDIO Host Controller Interface chip
that enables the host computer to use SDIO/SD/MMC cards
via a USB 2.0 or USB 1.1 host.
The VUB300 chip will be found in both physically separate
USB to SDIO/SD/MMC adapters and embedded on some motherboards.
The VUB300 chip supports SD and MMC memory cards in addition
to single and multifunction SDIO cards.
Some SDIO cards will need a firmware file to be loaded and
sent to VUB300 chip in order to achieve better data throughput.
Download these "Offload Pseudocode" from Elan Digital Systems'
web-site http://www.elandigitalsystems.com/support/downloads.php
and put them in /lib/firmware. Note that without these additional
firmware files the VUB300 chip will still function, but not at
the best obtainable data rate.
To compile this mmc host controller driver as a module,
choose M here: the module will be called vub300.
If you have a computer with an embedded VUB300 chip
or if you intend connecting a USB adapter based on a
VUB300 chip say Y or M here.
config MMC_USHC
tristate "USB SD Host Controller (USHC) support"
depends on USB

1
drivers/mmc/host/Makefile
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@ -41,6 +41,7 @@ obj-$(CONFIG_SDH_BFIN) += bfin_sdh.o
obj-$(CONFIG_MMC_DW) += dw_mmc.o
obj-$(CONFIG_MMC_SH_MMCIF) += sh_mmcif.o
obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
obj-$(CONFIG_MMC_VUB300) += vub300.o
obj-$(CONFIG_MMC_USHC) += ushc.o
obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-platform.o

2506
drivers/mmc/host/vub300.c Normal file
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