[PATCH v4 0/8] mtd: spi-nor: parse SFDP tables to setup (Q)SPI memories

From: Cyrille Pitchen
Date: Mon Nov 21 2016 - 09:16:05 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 sama5d4_tmp.pdf

sha1sum sama5d4_doc11238.pdf sama5d4_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
- n25q512 OK
- n25q01g OK

- mx25v1635f OK
- mx25l3235f OK
- mx25l3273f OK
- mx25l6433f OK
- mx25l6473f OK
- mx25l12835f OK
- mx25l12845g OK
- mx25l12873g OK
- mx25l25645g OK
- mx25l25673g OK
- mx25l51245g OK
- mx66l1g45g OK

- sst26vf016b OK
- sst26vf032b OK
- sst26vf064b OK

Best regards,



v3 -> v4
- replace dev_info() by dev_dbg() in patch 1.
- split former patch 2 into 2 patches:
+ new patch 2 deals with the rename of SPINOR_OP_READ4_* macros
+ new patch 3 deals with the alternative methode to support memory >16MiB
- add comment in patch 3 to describe the dichotomic search performed by
- change return type from int to void for m25p80_proto2nbits() in patch 6.
- remove former patches 8 & 9 from the v2 series: the support of the
Macronix mx66l1g45g memory will be sent in a separated patch.

v2 -> v3
- tested with new samples: Micron n25q512, n25q01g and Macronix
mx25v1635f, mx25l3235f, mx25l3273f.
- add "Reviewed-by: Jagan Teki <jagan@xxxxxxxxxxxx>" on patch 1.
- add "Tested-by: Vignesh R <vigneshr@xxxxxx>" on patch 2.
- fix some checkpatch warnings.
- add call of spi_nor_wait_till_ready() in spansion_new_quad_enable()
and sr2_bit7_quad_enable(), as suggested by Joel Esponde on patch 6.
- test JESD216 rev A (minor 5) instead of rev B (minor 6) with the return
code of spi_nor_parse_sfdp() from spi_nor_init_params() on patch 6.
The seven additional DWORDs of the Basic Flash Parameter Table were
introduced in rev A, not rev B, so the 15th DWORD was already available
in rev A. The 15th DWORD provides us with the Quad Enable Requirements
(QER) bits.
Basic Flash Parameter Table size:
+ JESD216 : 9 DWORDS

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

Cyrille Pitchen (8):
mtd: spi-nor: improve macronix_quad_enable()
mtd: spi-nor: rename SPINOR_OP_* macros of the 4-byte address op codes
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

drivers/mtd/devices/m25p80.c | 191 ++++--
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 | 1017 ++++++++++++++++++++++++++++---
drivers/spi/spi-bcm-qspi.c | 6 +-
include/linux/mtd/spi-nor.h | 164 ++++-
12 files changed, 1351 insertions(+), 240 deletions(-)