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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 blk-mq: I/O and timer unplugs are inverted in blktrace 2018-09-27 13:12:44 -06:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto DMAengine updates for v4.19-rc1 2018-08-18 15:55:59 -07:00
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 kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
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 Kbuild updates for v4.19 (2nd) 2018-08-25 13:40:38 -07:00
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 lib/xz: Put CRC32_POLY_LE in xz_private.h 2018-10-02 08:44:59 +10:00
LICENSES LICENSES: Add Linux-OpenIB license text 2018-04-27 16:41:53 -06:00
mm Merge branch 'akpm' 2018-10-05 16:33:03 -07:00
net ipv6: take rcu lock in rawv6_send_hdrinc() 2018-10-05 14:45:34 -07:00
samples samples/bpf: all XDP samples should unload xdp/bpf prog on SIGTERM 2018-08-16 21:55:32 +02:00
scripts linux-kselftest-4.19-rc5 2018-09-17 07:24:28 +02:00
security Revert "uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name" 2018-09-25 13:28:58 +02:00
sound ALSA: hda/realtek - Cannot adjust speaker's volume on Dell XPS 27 7760 2018-10-04 07:50:48 +02:00
tools Char/Misc fixes for 4.19-rc7 2018-10-07 08:15:57 +02:00
usr initramfs: move gen_initramfs_list.sh from scripts/ to usr/ 2018-08-22 23:21:44 +09:00
virt KVM: Remove obsolete kvm_unmap_hva notifier backend 2018-09-07 15:06:02 +02:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
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 Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

README 

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    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
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.