Hi Miquel,
Le lun. 4 mars 2019 à 16:09, Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
a écrit :
Hi Paul,
Paul Cercueil <paul@xxxxxxxxxxxxxxx> wrote on Mon, 04 Mar 2019
19:30:04
+0100:
On Mon, Mar 4, 2019 at 11:35 AM, Miquel Raynal
<miquel.raynal@xxxxxxxxxxx> wrote:
> Hi Paul,
>
> Paul Cercueil <paul@xxxxxxxxxxxxxxx
<mailto:paul@xxxxxxxxxxxxxxx>> > wrote on Sat, 9 Feb 2019 16:23:04
> -0300:
>
>> The boot ROM of the JZ4725B SoC expects a specific OOB layout
on the
>> NAND, so we use it unconditionally in the ingenic-nand driver.
>> >> Also add the jz4725b-bch driver to support the
JZ4725B-specific BCH
>> hardware.
>> >> Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx >>
<mailto:paul@xxxxxxxxxxxxxxx>>
>> ---
>> >> Changes:
>> >> v2: Instead of forcing the OOB layout, leave it to the board
code or
>> devicetree to decide if the jz4725b-specific layout should
be >> used
>> or not.
>> >> v3: - Revert the change in v2, as the previous behaviour was
>> correct.
>> - Also add support for the hardware BCH of the JZ4725B in
this
>> patch.
>> >> v4: - Add MODULE_* macros
>> - Add tweaks suggested by upstream feedback
>> >> drivers/mtd/nand/raw/ingenic/Kconfig | 10 +
>> drivers/mtd/nand/raw/ingenic/Makefile | 1 +
>> drivers/mtd/nand/raw/ingenic/ingenic_nand.c | 48 ++++-
>> drivers/mtd/nand/raw/ingenic/jz4725b_bch.c | 292 >>
++++++++++++++++++++++++++++
>> 4 files changed, 350 insertions(+), 1 deletion(-)
>> create mode 100644 drivers/mtd/nand/raw/ingenic/jz4725b_bch.c
>> >
> [...]
>
>> +static int jz4725b_calculate(struct ingenic_ecc *bch,
>> + struct ingenic_ecc_params *params,
>> + const u8 *buf, u8 *ecc_code)
>> +{
>> + int ret;
>> +
>> + mutex_lock(&bch->lock);
>> + ret = jz4725b_bch_init(bch, params, true);
>
> I really don't like this bch_init name. A BCH initialization is
what > is
> supposed to be done only once (probably at boot time), can you
find a
> better name or a better organization of the correct/calculate
path?
jz4725b_bch_setup() maybe?
Unless I am not understanding what this does, I don't get why you
would
need to do this setup everytime you want to use the ECC engine. Are
you
sure this is needed?
It configures the hardware for a new ECC encoding or decoding sequence,
so
yes, it has to be done everytime.
-Paul
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