The inconsistent NULL checking in this function causes static checker
warnings.
drivers/mmc/host/renesas_sdhi_sys_dmac.c:360 renesas_sdhi_sys_dmac_issue_tasklet_fn()
error: we previously assumed 'host' could be null (see line 351)
On reviewing this code, "host" can't ever be NULL so we can just remove
the check.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
struct tmio_mmc_host has "dma_dataend" and "dma_complete", but in fact,
they are Renesas private data. Move them to renesas_sdhi.h
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
struct tmio_mmc_dma looks like TMIO core data, but in fact, Renesas
private data. Move it to renesas_sdhi.h (probably, it is better to
rename it to renesas_sdhi_dma, or squash it into struct renesas_sdhi).
I also moved struct renesas_sdhi and host_to_priv() to that header
because they are necessary to convert the tmio_mmc_host pointer into
the renesas_sdhi pointer.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Implement fallback compatibility strings for R-Car Gen 1, 2 and 3.
In the case of Renesas R-Car hardware we know that there are generations of
SoCs, f.e. Gen 1 and 2. But beyond that its not clear what the relationship
between IP blocks might be. For example, I believe that r8a7790 is older
than r8a7791 but that doesn't imply that the latter is a descendant of the
former or vice versa.
We can, however, by examining the documentation and behaviour of the
hardware at run-time observe that the current driver implementation appears
to be compatible with the IP blocks on SoCs within a given generation.
For the above reasons and convenience when enabling new SoCs a
per-generation fallback compatibility string scheme is being adopted for
drivers for Renesas SoCs.
Also, improve readability by listing the shmobile fallback compatibility
string after the more-specific compatibility strings they provide a
fallback for.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Add support for r8a7743/5 SoC.Renesas RZ/G1[ME] (R8A7743/5) SDHI
is identical to the R-Car Gen2 family.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
It is documented, so enable it to follow the recommendation in the docs
and also save a few cycles.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
There is one SDHI instance on Gen2 which does not have the CBSY bit.
So, turn CBSY usage into an extra flag and set it accordingly. This has
the additional advantage that we can also set it for other incarnations
later.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Provide a whitelist for Gen3 SoC ES versions for both the SYS DMAC and
internal DMAC variants of the SDHI driver. This is to allow drivers to
only initialise for Gen3 SoC ES versions for which they are the appropriate
DMAC implementation. Currently internal DMAC is the appropriate
implementation for all supported Gen3 SoC ES versions.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Add a new variant of the SDHI driver to support R-Car Gen3 with DMA via
on-chip bus mastering. Since the DMAC is in a part of the SDHI module it
is not suitable to be used via DMA Engine.
Clearing of DM_CM_INFO1 after DMA thanks to Dirk Behme
Cc: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Add dataend to DMA ops to allow DMAC implementation dependent
handling of DMA data end.
Also implement the operation for SDHI.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Update copyrights to reflect work by Wolfram Sang and myself since last
year.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Make renesas_sdhi_sys_dmac.c a top-level module file that makes use of
library code supplied by renesas_sdhi_core.c
This is in order to facilitate adding other variants of SDHI;
in particular SDHI using different DMA controllers.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[Arnd: Fixed module build error]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Rename the source file for DMA for SDHI as a follow-up to attaching
DMA code to the SDHI driver rather than the tmio_core driver.
The name "renesas" is chosen as the SDHI driver is applicable to a wider
range of SoCs than SH-Mobile it seems to be a more appropriate name.
However, the SDHI driver source itself, is left as sh_mobile_sdhi to
avoid unnecessary churn.
The name sys_dmac was chosen to reflect the type of DMA used.
Internal symbols have also been renamed to reflect the filename change.
A follow-up patch will re-organise the SDHI driver removing
the need for renesas_sdhi_get_dma_ops().
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
