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SubjectRe: [PATCH v2 00/22] mtd: spi-nor: Quad Enable and (un)lock methods
Date
Hi, Jonas,

s25fl512s is impacted by this patch set. Would you please do a little test to
see if everything is ok for your flash with these patches applied? I don't have
the flash, so I can't do the tests by myself. There is a possible test method
described below in the cover letter.

You can find the patches at
https://patchwork.ozlabs.org/project/linux-mtd/list/?series=132270 or at
https://github.com/ambarus/linux-0day, branch spi-nor/quad-enable-rework-v2.

Thank you,
ta

On 09/24/2019 10:45 AM, Tudor Ambarus - M18064 wrote:
> From: Tudor Ambarus <tudor.ambarus@microchip.com>
>
> Patches 1 - 14 are just clean up patches for the Flash Register
> Operations.
>
> Patches 15 - 22 deal with the Quad Enable and the (un)lock methods.
> Fixed the clearing of QE bit on (un)lock() operations. Reworked the
> Quad Enable methods and the disabling of the block write protection
> at power-up.
>
> Again, this is just compile tested, I don't have (yet) a relevant
> spansion-like flash memory to test the (un)lock() methods, so I'll need
> your help for testing this patch set.
>
> The patch set can be tested using mtd-utils:
> 1/ do a read-erase-write-read-back test immediately after boot, to check
> the spi_nor_unlock_all() method. The focus is on the erase/write
> methods, we want to see if the flash is unlocked at power-up.
> mtd_debug read /dev/mtd-yours offset size read-file
> hexdump read-file
> mtd_debug erase /dev/mtd-yours offset size
> dd if=/dev/urandom of=write-file bs=please-choose count=please-choose
> mtd_debug write /dev/mtd-yours offset write-file-size write-file
> mtd_debug read /dev/mtd-yours offset write-file-size read-file
> sha1sum read-file write-file
> 2/ lock flash then try to erase/write it, to see if the lock works
> flash_lock /dev/mtd-yours offset block-count
> Do the read-erase-write-read-back test from 1/. The contents of
> flash should not change in the erase and write steps.
> 3/ unlock flash and do the read-erase-write-read-back from 1/. The value of the
> QEE should not change and you should be able to erase and write the flash.
> Test 1/ should be successful.
>
> v2:
> - Introduce spi_nor_write_16bit_cr_and_check() as per Vignesh's suggestion. The
> Configuration Register contains bits that can be updated in future: FREEZE,
> CMP. Provide a generic method that allows updating all bits of the
> Configuration Register.
> - Fix SNOR_F_NO_READ_CR case in
> "mtd: spi-nor: Rework the disabling of block write protection". When the flash
> doesn't support the CR Read command, we make an assumption about the value of
> the QE bit. In spi_nor_init(), call spi_nor_quad_enable() first, then
> spi_nor_unlock_all(), so that at the spi_nor_unlock_all() time we can be sure
> the QE bit has value one, because of the previous call to spi_nor_quad_enable().
> - Fix if statement in spi_nor_write_sr_and_check():
> if (nor->flags & SNOR_F_HAS_16BIT_SR)
> - Fix documentation warnings.
> - New patch: "mtd: spi-nor: Check all the bits written, not just the BP ones".
> - Drop Global Unlock patches, will send them in a different patch set.
>
> Tudor Ambarus (22):
> mtd: spi-nor: hisi-sfc: Drop nor->erase NULL assignment
> mtd: spi-nor: Introduce 'struct spi_nor_controller_ops'
> mtd: spi-nor: cadence-quadspi: Fix cqspi_command_read() definition
> mtd: spi-nor: Rename nor->params to nor->flash
> mtd: spi-nor: Rework read_sr()
> mtd: spi-nor: Rework read_fsr()
> mtd: spi-nor: Rework read_cr()
> mtd: spi-nor: Rework write_enable/disable()
> mtd: spi-nor: Fix retlen handling in sst_write()
> mtd: spi-nor: Rework write_sr()
> mtd: spi-nor: Rework spi_nor_read/write_sr2()
> mtd: spi-nor: Report error in spi_nor_xread_sr()
> mtd: spi-nor: Void return type for spi_nor_clear_sr/fsr()
> mtd: spi-nor: Drop duplicated new line
> mtd: spi-nor: Drop spansion_quad_enable()
> mtd: spi-nor: Fix errno on quad_enable methods
> mtd: spi-nor: Check all the bits written, not just the BP ones
> mtd: spi-nor: Fix clearing of QE bit on lock()/unlock()
> mtd: spi-nor: Rework macronix_quad_enable()
> mtd: spi-nor: Rework spansion(_no)_read_cr_quad_enable()
> mtd: spi-nor: Update sr2_bit7_quad_enable()
> mtd: spi-nor: Rework the disabling of block write protection
>
> drivers/mtd/spi-nor/aspeed-smc.c | 23 +-
> drivers/mtd/spi-nor/cadence-quadspi.c | 54 +-
> drivers/mtd/spi-nor/hisi-sfc.c | 23 +-
> drivers/mtd/spi-nor/intel-spi.c | 24 +-
> drivers/mtd/spi-nor/mtk-quadspi.c | 25 +-
> drivers/mtd/spi-nor/nxp-spifi.c | 23 +-
> drivers/mtd/spi-nor/spi-nor.c | 1716 ++++++++++++++++++---------------
> include/linux/mtd/spi-nor.h | 74 +-
> 8 files changed, 1058 insertions(+), 904 deletions(-)
>
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