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Masahiro Yamada 3fd784f745 mmc: uniphier-sd: add UniPhier SD/eMMC controller driver Here is another TMIO MMC variant found in Socionext UniPhier SoCs. As commit `b6147490e6` ("mmc: tmio: split core functionality, DMA and MFD glue") said, these MMC controllers use the IP from Panasonic. However, the MMC controller in the TMIO (Toshiba Mobile IO) MFD chip was the first upstreamed user of this IP. The common driver code for this IP is now called 'tmio-mmc-core' in Linux although it is a historical misnomer. Anyway, this driver select's MMC_TMIO_CORE to borrow the common code from tmio-mmc-core.c Older UniPhier SoCs (LD4, Pro4, sLD8) support the external DMA engine like renesas_sdhi_sys_dmac.c. The difference is UniPhier SoCs use a single DMA channel whereas Renesas chips request separate channels for RX and TX. Newer UniPhier SoCs (Pro5 and later) support the internal DMA engine like renesas_sdhi_internal_dmac.c The register map is almost the same, so I guess Renesas and Socionext use the same internal DMA hardware. The main difference is, the register offsets are doubled for Renesas. Renesas Socionext SDHI UniPhier DM_CM_DTRAN_MODE 0x820 0x410 DM_CM_DTRAN_CTRL 0x828 0x414 DM_CM_RST 0x830 0x418 DM_CM_INFO1 0x840 0x420 DM_CM_INFO1_MASK 0x848 0x424 DM_CM_INFO2 0x850 0x428 DM_CM_INFO2_MASK 0x858 0x42c DM_DTRAN_ADDR 0x880 0x440 DM_DTRAN_ADDREX --- 0x444 This comes from the difference of host->bus_shift; 2 for Renesas SoCs, and 1 for UniPhier SoCs. Also, the datasheet for UniPhier SoCs defines DM_DTRAN_ADDR and DM_DTRAN_ADDREX as two separate registers. It could be possible to factor out the DMA common code by introducing some hooks to cope with platform quirks, but this patch does not touch that for now. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>		2018-10-08 11:40:43 +02:00
arch	powerpc fixes for 4.19 #4	2018-10-07 07:05:43 +02:00
block
certs
crypto
Documentation	dt-bindings: mmc: add DT binding for UniPhier SD/eMMC controller	2018-10-08 11:40:43 +02:00
drivers	mmc: uniphier-sd: add UniPhier SD/eMMC controller driver	2018-10-08 11:40:43 +02:00
firmware
fs	ocfs2: fix locking for res->tracking and dlm->tracking_list	2018-10-05 16:32:05 -07:00
include	Char/Misc fixes for 4.19-rc7	2018-10-07 08:15:57 +02:00
init
ipc	ipc/shm.c: use ERR_CAST() for shm_lock() error return	2018-10-05 16:32:04 -07:00
kernel	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-10-06 02:11:30 -07:00
lib
LICENSES
mm	Merge branch 'akpm'	2018-10-05 16:33:03 -07:00
net
samples
scripts
security
sound
tools	Char/Misc fixes for 4.19-rc7	2018-10-07 08:15:57 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	mmc: uniphier-sd: add UniPhier SD/eMMC controller driver	2018-10-08 11:40:43 +02:00
Makefile	Linux 4.19-rc7	2018-10-07 17:26:02 +02:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
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In order to build the documentation, use ``make htmldocs`` or
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    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
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the problems which may result by upgrading your kernel.