[U-Boot] [PATCH v2 00/20] Bring NAND support to Nintendo NES Classic

[Boris Brezillon <boris.brezillon@bootlin.com>]

On Thu, 22 Feb 2018 14:33:30 +0100
Miquel Raynal <miquel.raynal@bootlin.com> wrote:

> Hello,
> 
> This series first adds fixes and enhancements to sunxi NAND drivers (SPL
> and U-Boot). Once this is done, the SPL NAND driver is converted to use
> PIO instead of DMA with the goal to support all SoCs with this IP
> without the need for DMA-related code. Finally, NAND support is added to
> Nintendo NES Classic through Kconfig and DT additions.
> 
> Thanks,
> Miquèl
> 
> 
> Changes since v1:
> =================
> 
> All:
> ----
>   - Enhance all commit messages.
>   - Rebased on top of master branch (I should have done that earlier but
>     I forgot I was on an old revision).
> 
> Fix binman_sym output check
> ---------------------------
>   - SPL seems to be broken for a few weeks when using raw NAND, fix it
>     by changing the error condition.
> 
> Fix strength
> ------------
>   - Add comment explaining the added line and moved the line for
>     clarification on why it is needed.
>   - Add forgotten Boris' Suggested-by tag.
> 
> Fix second case of modulo by zero  error
> ----------------------------------------
>   - Added a reference to the first occurence of this issue.
> 
> Allow SPL to be compiled for sun8i platforms
> --------------------------------------------
>   - This commit is not about compiling the SPL, but the NAND support in
>     the SPL, as corrected by Maxime.
> 
> Enhancements and cleaning
> -------------------------
>   - Patch split into several logical chunks, as requested.
>   - Removed useless udelay(1), that was added for debugging purpose.
>   - Introduced the nand_exec_cmd() helper to mutualize code one step
>     further.
>   - Add an udelay(1) after changing the column to respect the minimum
>     tCCS delay (Change Column Setup time).
>   - Canceled moving to global scope the ecc_strength array.
> 
> Use PIO instead of DMA
> ----------------------
>   - Change commit message/title.
>   - Cancel removing NFC related definitions: they can be useful as the
>     this IP is quite under-documented.
>   - Merge nand_reset_column and nand_change_column (in another patch).
>   - Moved the copy of the data after the check of the ECC status.
>   - ECC chunks are read manually, return if the first chunk is empty
>     only (needed for configuration research), otherwise it should not be
>     treated as an error.
> 
> Add NAND node to sun8i
> ----------------------
>   - U-Boot master branch already has this node, remove the patch.
> 
> Enable NAND on NES classic
> --------------------------
>   - Change the DT cells size from 2 to 1.
> 
> Add NAND support for NES classic
> --------------------------------
>   - Split in several patches, moving SPL_NAND_SUPPORT and NAND_SUNXI out
>     of the defconfig files (NES and CHIP pro) to be automatically
>     selected depending on NAND_SUNXI and ARCH_SUNXI.
>   - Moved the NAND parameters to Kconfig (only for SUNXI because the
>     tool did not work as expected, maybe due to some definitions that
>     are not "numbers" but multiplications and sometimes use other
>     definitions (NAND page size, 2K_SZ, etc).
> 
> 
> Miquel Raynal (20):
>   spl: fix binman_sym output check
>   mtd: nand: sunxi: fix ECC strength choice
>   spl: nand: sunxi: fix second case of modulo by zero error
>   spl: nand: sunxi: fix typo on register name
>   spl: nand: sunxi: introduce the nand_wait_int() helper
>   spl: nand: sunxi: introduce the nand_wait_cmd_fifo_empty() helper
>   spl: nand: sunxi: add missing status clear
>   spl: nand: sunxi: create an helper to handle command execution
>   spl: nand: sunxi: ensure enough time has passed after changing the
>     column
>   spl: nand: sunxi: make the reset column helper more generic
>   sunxi: spl: deassert the NAND controller reset line
>   spl: nand: sunxi: declare the ecc_bytes array globally
>   spl: nand: sunxi: use PIO instead of DMA
>   sunxi: spl: remove DMA related settings of the NAND controller
>   sunxi: allow NAND support in SPL to be compiled for sun8i platforms
>   sunxi: dts: enable NAND on NES classic
>   sunxi: automatically select SPL_NAND_SUPPORT in Kconfig
>   sunxi: make NAND_SUNXI use ARCH_SUNXI as default in Kconfig
>   sunxi: move the NAND parameters to Kconfig
>   configs: add NAND support for NES Classic

Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>

on all NAND related patches.

> 
>  arch/arm/dts/sun8i-a23-a33.dtsi                    |  18 ++
>  .../dts/sun8i-r16-nintendo-nes-classic-edition.dts |  14 ++
>  arch/arm/include/asm/arch-sunxi/clock_sun6i.h      |   6 +
>  board/sunxi/board.c                                |   6 +-
>  common/spl/spl.c                                   |  10 +-
>  configs/CHIP_pro_defconfig                         |   6 +-
>  configs/Nintendo_NES_Classic_Edition_defconfig     |   4 +
>  drivers/mtd/nand/Kconfig                           |  26 ++-
>  drivers/mtd/nand/sunxi_nand.c                      |   8 +-
>  drivers/mtd/nand/sunxi_nand_spl.c                  | 242 ++++++++++-----------
>  10 files changed, 206 insertions(+), 134 deletions(-)
> 



-- 
Boris Brezillon, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com