[PATCH v2 0/9] mtd: spi-nor: parse SFDP tables to setup (Q)SPI memories

From: Cyrille Pitchen
Date: Wed Oct 05 2016 - 07:59:57 EST

Hi all,

This series extends support of SPI protocols to new protocols such as
SPI x-2-2 and SPI x-4-4. Also spi_nor_scan() tries now to select the right
op codes, timing parameters (number of mode and dummy cycles) and erase
sector size by parsing the Serial Flash Discoverable Parameter (SFDP)
tables, when available, as defined in the JEDEC JESD216 specifications.

When SFDP tables are not available, legacy settings are still used for
backward compatibility (SPI and earlier QSPI memories).

Support of SPI memories >128Mbits is also improved by using the 4byte
address instruction set, when available. Using those dedicated op codes
is stateless as opposed to enter the 4byte address mode, hence a better
compatibility with some boot loaders which expect to use 3byte address
op codes.

This series was tested on a Atmel sama5d2 xplained board with the
atmel-qspi.c driver. Except for SST memories, the SPI bus clock was set
to 83MHz. The config MTD_SPI_NOR_USE_4K_SECTORS was selected.

For my tests, I used some shell scripts using mtd_debug and sha1sum to
check the data integrity.


mtd_debug erase /dev/mtd5 0 0x780000
mtd_debug write /dev/mtd5 0 7674703 sama5d4_doc11238.pdf
mtd_debug read /dev/mtd5 0 7674703 sam5d4_tmp.pdf

sha1sum sama5d4_doc11238.pdf sam5d4_tmp.pdf

Depending on the actual memory size, I may have used other partitions
(/dev/mtd4) and input file size (2880044 and 320044 bytes).

The series was tested with the following QSPI memories:

- s25fl127s OK
- s25fl512s OK
- s25fl164k OK

- n25q128a OK

- mx25l6433f OK
- mx25l6473f OK
- mx25l12835f OK
- mx25l12845g OK
- mx25l12873g OK
- mx25l25645g OK
- mx25l25673g OK
- mx25l51245g OK
- mx66l1g45g OK (1)

- sst26vf016b OK (2)
- sst26vf032b OK (2)
- sst26vf064b OK (2)

(1): requires patch 8
(2): requires patch 9, the SPI bus clock frequency was decreased down to 55.3MHz

Best regards,



v1 -> v2
- fix patch 3 to resolve compiler errors on hisi-sfc.c and cadence-quadspi.c

Cyrille Pitchen (9):
mtd: spi-nor: improve macronix_quad_enable()
mtd: spi-nor: add an alternative method to support memory >16MiB
mtd: spi-nor: add support of SPI protocols like SPI 1-2-2 and SPI
mtd: spi-nor: remove unused set_quad_mode() function
mtd: m25p80: add support of dual and quad spi protocols to all
mtd: spi-nor: parse Serial Flash Discoverable Parameters (SFDP) tables
mtd: spi-nor: parse SFDP 4-byte Address Instruction Table
mtd: spi-nor: add support to Macronix mx66l1g45g
mtd: spi-nor: add support to SST sst26* QSPI memories

drivers/mtd/devices/m25p80.c | 204 +++++--
drivers/mtd/devices/serial_flash_cmds.h | 7 -
drivers/mtd/devices/st_spi_fsm.c | 28 +-
drivers/mtd/spi-nor/atmel-quadspi.c | 83 ++-
drivers/mtd/spi-nor/cadence-quadspi.c | 18 +-
drivers/mtd/spi-nor/fsl-quadspi.c | 8 +-
drivers/mtd/spi-nor/hisi-sfc.c | 32 +-
drivers/mtd/spi-nor/mtk-quadspi.c | 16 +-
drivers/mtd/spi-nor/nxp-spifi.c | 21 +-
drivers/mtd/spi-nor/spi-nor.c | 1013 ++++++++++++++++++++++++++++---
include/linux/mtd/spi-nor.h | 165 ++++-
11 files changed, 1359 insertions(+), 236 deletions(-)