[U-Boot] [PATCH v4 00/27] SPI-NAND support

[Miquel Raynal <miquel.raynal@bootlin.com>]

Hi Jagan,

Jagan Teki <jagan@amarulasolutions.com> wrote on Thu, 26 Jul 2018
11:00:56 +0530:

> On Fri, Jul 13, 2018 at 6:01 PM, Miquel Raynal
> <miquel.raynal@bootlin.com> wrote:
> > During the last months, Boris Brezillon shared his work to support
> > serial flashes within Linux. First, he delivered (and merged) a new
> > layer called spi-mem. He also initiated in Linux MTD subsystem the move
> > of all 'raw' NAND related code to a raw/ subdirectory, adding at the
> > same time a NAND core that would be shared with all NAND devices. Then,
> > he contributed a generic SPI-NAND driver, making use of this NAND core,
> > as well as some vendor code to drive a few chips.
> >
> > On top of this work, I added an 'mtd' U-Boot command to handle all sort
> > of MTD devices. This should become the default command instead of having
> > one per flash flavor ('sf', 'nand', 'spi-nand' ?).
> >
> > The series has been tested on an Ocelot board PCB123 (VSC7514),
> > featuring a Macronix SPI NAND chip.
> >
> > TL;DR: the series contains:
> > - A few patches from Linux to resynchronize some areas of the MTD layer.
> > - Various fixes and re-organization of the MTD subsystem.
> > - The introduction of the SPI-mem interface.
> > - The addition of the generic SPI-NAND driver (and its bindings).
> > - Several SPI NAND chip drivers (Macronix, Micron, Winbond).
> > - A new 'mtd' command.
> > - Support for spi-nand devices in mtdparts.
> >
> > To test your SPI-NAND device with U-Boot simply follow these lines:
> >  
> >> setenv mtdparts mtdparts=spi-nand0:1m(foo),-(bar)
> >> setenv mtdids spi-nand0=spi-nand0
> >> mtdparts             # show the spi-nand device partitions
> >> ubi part bar         # create a static UBI volume in the bar partition  
> >
> > Thanks,
> > Miquèl
> >
> > Changes since v3:
> > -----------------
> > * Fixed the debug messages in spi-mem to print either Rx or Tx data.
> > * Fixed a Kconfig error that prevented to build mtdparts with plain
> >   defconfig.
> > * Fixed a compilation error due to the above error that prevented one
> >   file to be compiled.
> > * Adapted the mtd command to probe MTD partitions also.
> > * Declared mtd_probe_devices() in a header so mtdparts or UBI could
> >   use it too (to probe all devices and MTD partitions in a clean way).
> > * As I worked on mtdparts, I found annoying and completely useless the
> >   fact that we need to prefix the environment variable with
> >   "mtdparts=". Canceled this obligation.
> > * Added one patch to allow spi-nand devices to be recognized by mtdparts
> >   (this is purely useless but needed to be done in order to use this
> >   command).
> > * Removed useless definitions of MTD device types in UBI code.
> > * Wrote a generic mtdparts environment variable parser, used by the mtd
> >   command.
> > * Used the mtd_probe_devices() function from get_mtd_info() in
> >   cmd/mtdparts.c to be sure the desired partition really does not exist
> >   (otherwise it will be probed and then found).
> >
> > Changes since v2:
> > -----------------
> > * Rebased on u-boot master branch.
> > * Removed extra-parenthesis in
> >   "mtd: Fallback to ->_read/write() when ->_read/write_oob() is missing"
> > * s/fiels/files/ in "mtd: move NAND fiels into a raw/ subdirectory"
> > * Do not describe generic SPI device properties in SPI NAND bindings.
> > * Changes in the mtd command:
> >   * Printing more information in 'mtd list' (device type, device
> >     characteristics)
> >   * Switch to do_div() instead of '(u32)value64b % value32b' which only
> >     worked because value32b was a power of 2.
> >   * Removed erase.chip option.
> >   * By default, erase/read/write happen on the full MTD device while a
> >     dump will only work on a single page.
> >
> > Changes since v1:
> > -----------------
> > * Fixed the nand_memorg structure of the MX35LF2GE4AB chip.
> > * Added Reviewed-by tags from Jagan.
> > * Backported and squashed two patches fixing things in the SPI NAND core
> >   received on the Linux ML.
> > * Backported more changes in mtdcore.c from Linux.
> > * Added a patch to add a fallback on mtd->_read/_write() in mtdcore.c
> >   when mtd->_read/write_oob() is not supported.
> > * Removed the DT changes, useless as the DTs are not available in
> >   mainline yet.
> > * Addressed Boris/Stefan comments on the 'mtd' command.
> > * Added support for multi-pages OOB read/write.
> >
> >
> > Boris Brezillon (7):
> >   mtd: Fallback to ->_read/write_oob() when ->_read/write() is missing
> >   mtd: Add sanity checks in mtd_write/read_oob()
> >   mtd: nand: Add core infrastructure to deal with NAND devices
> >   mtd: nand: Pass mode information to nand_page_io_req
> >   spi: Extend the core to ease integration of SPI memory controllers
> >   mtd: spinand: Add initial support for the MX35LF1GE4AB chip
> >   dt-bindings: Add bindings for SPI NAND devices
> >
> > Brian Norris (1):
> >   mtd: add get/set of_node/flash_node helpers
> >
> > Ezequiel Garcia (1):
> >   mtd: Uninline mtd_write_oob and move it to mtdcore.c
> >
> > Frieder Schrempf (1):
> >   mtd: spinand: Add initial support for Winbond W25M02GV
> >
> > Miquel Raynal (15):
> >   mtd: Fallback to ->_read/write() when ->_read/write_oob() is missing
> >   mtd: fix build issue with includes
> >   mtd: move definitions to enlarge their range
> >   mtd: move all flash categories inside MTD submenu
> >   mtd: move NAND files into a raw/ subdirectory
> >   mtd: rename nand into rawnand in Kconfig prompt
> >   mtd: spinand: Add initial support for the MX35LF2GE4AB chip
> >   mtd: declare MTD_PARTITIONS symbol in Kconfig
> >   cmd: ubi: delete useless and misleading definitions
> >   cmd: mtdparts: accept spi-nand devices
> >   cmd: mtdparts: add a generic 'mtdparts' parser
> >   cmd: mtdparts: remove useless 'mtdparts=' prefix
> >   mtd: uclass: add probe function
> >   cmd: mtd: add 'mtd' command
> >   cmd: mtdparts: try to probe the MTD devices as a fallback
> >
> > Peter Pan (2):
> >   mtd: nand: Add core infrastructure to support SPI NANDs
> >   mtd: spinand: Add initial support for Micron MT29F2G01ABAGD  
> 
> Acked--by: Jagan Teki <jagan@openedev.com>
> 

Thanks!

> Can you rebase on master and send the needed patches or whole? Look
> like some changes been added in drivers/mtd/nand/Kconfig

I'll wait a bit for Stefan review also and I think I missed something
in mtdparts: old partitions are not freed when creating new ones.

Kind regards,
Miquèl