Hi,
This series adds support for octal DTR flashes in the spi-nor framework, and then adds hooks for the Cypress Semper flash which is an xSPI compliant Octal DTR flash.
The Cadence QSPI controller driver is also updated to run in Octal DTR mode.
Tested on TI J721e EVM.
The Travis CI build can be found here [0]. It is from the previous version, but there is no code change between the two versions.
[0] https://travis-ci.org/github/prati0100/uboot/builds/694602802
Changes in v6: - Use "# CONFIG_SPI_FLASH_SMART_HWCAPS is not set" instead of "CONFIG_SPI_FLASH_SMART_HWCAPS=n" in x530_defconfig.
Changes in v5: - Fix build breaking when CONFIG_SPL_SPI_FLASH_TINY is enabled because spi-nor-tiny did not have spi_nor_remove().
- The build was breaking in x530 because of SPL size too big. Fix it by the below changes.
- Re-introduce old hwcaps selection logic and put the new one behind a config. This lets boards with size restrictions use the old logic which takes up less space. The code was getting hard to manage with the old code behind ifdefs. So, re-structure the old hwcaps selection logic and move it into one function: spi_nor_adjust_hwcaps(). This way, the common code just calls spi_nor_adjust_hwcaps(), but the old or new hwcaps selection is used based on the config option selected.
- Put spi_nor_soft_reset() behind the config option SPI_NOR_SOFT_RESET.
- Rename the config option used for soft resetting on boot to SPI_NOR_SOFT_RESET_ON_BOOT to make its intention clearer.
- Put the fixup hooks of MT35XU512ABA and S28HS512T flashes behind config options to reduce code size on platforms that don't need them.
- Introduce spi_nor_set_fixups(). Earlier, the fixup members of each flash was specified in spi-nor-ids.c. This meant they had to be declared as extern in sf_internal.h. But since spi-nor-tiny.c also uses it, and it doesn't have those fixups, they had to be put behind in an ifdef. The ".fixups = " assignment in spi-nor-ids.c also had to be put in an ifdef to account for spi-nor-tiny.c not having the fixup hooks. On top of this, the fixup of each flash is behind the flash's config.
All this lead to a soup of ifdefs that wasn't easy to digest. So don't set the fixups in the common code. Instead, add a function in spi-nor-core.c that sets the fixups of each flash. This isn't ideal, but its the best compromise I could figure out.
- Build were breaking with boards that use spi-mem-nodm.c because it doesn't have spi_mem_supports_op() which is needed for smart hwcaps selection. Add an equivalent to spi_mem_default_supports_op() there.
- Replace uses of sizeof(op->cmd.opcode) with op->cmd.nbytes.
- Do not set quad_enable to NULL if the value is set to reserved. Instead just print a warning and go on. quad_enable should be set to NULL in fixup hooks instead. Suggested on the Linux list.
- Set dummy cycles for DTR mode in spi_nor_micron_octal_dtr_enable() instead of in the post sfdp hook. This keeps the flash functional in case Octal DTR mode is not selected.
- Only use nor->rdsr_addr_nbytes and nor->rdsr_dummy when in Octal DTR mode. This makes sure the flash is functional in case Octal DTR is not selected.
- Rebase on latest master and fix a small merge conflict.
Changes in v4: - Fix BFPT parsing stopping too early for JESD216 rev B flashes.
- Instead of just checking for spi_nor_get_protocol_width() in spi_nor_octal_dtr_enable(), make sure the protocol is SNOR_PROTO_8_8_8_DTR since get_protocol_width() only cares about data width.
- Do not enable stateful X-X-X modes if the reset line is broken.
- Instead of setting SNOR_READ_HWCAPS_8_8_8_DTR from Profile 1.0 table parsing, do it in spi_nor_info_init_params() instead based on the SPI_NOR_OCTAL_DTR_READ flag instead.
- Set SNOR_HWCAPS_PP_8_8_8_DTR in s28hs post_sfdp hook since this capability is no longer set in Profile 1.0 parsing.
- Rename spi_nor_cypress_octal_enable() to spi_nor_cypress_octal_dtr_enable().
- Instead of hard-coding 8D-8D-8D Fast Read dummy cycles to 20, find them out from the Profile 1.0 table.
- Call post-bfpt fixup when exiting early because of JESD rev A.
- Do not make an invalid Quad Enable BFPT field a fatal error. Silently ignore it by assuming no quad enable bit is present.
- Set cmd.nbytes to 1 when using SPI_MEM_OP_CMD().
- Reject ops with more than 1 command byte in spi_mem_default_supports_op().
- Drop flag SPI_NOR_SOFT_RESET. Instead, discover soft reset capability via BFPT.
- Add missing headers that were removed from common header.
Changes in v3: - Read 2 bytes in Octal DTR mode when reading SR and FSR to avoid tripping up controllers.
- Use op->data.nbytes as a measure of whether the data phase exists or not. This fixes data buswidth not being updadted for SR and FSR reads because they keep data buffer as NULL when calling spi_nor_setup_op().
- Add support for Micron mt35xu512aba to run in Octal DTR mode.
Pratyush Yadav (21): spi: spi-mem: allow specifying whether an op is DTR or not spi: spi-mem: allow specifying a command's extension spi: cadence-qspi: Do not calibrate when device tree sets read delay spi: cadence-qspi: Add support for octal DTR flashes arm: mvebu: x530: Disable smart hwcaps selection mtd: spi-nor-core: Add a ->setup() hook mtd: spi-nor-core: Move SFDP related declarations to top mtd: spi-nor-core: Introduce flash-specific fixup hooks mtd: spi-nor-core: Rework hwcaps selection mtd: spi-nor-core: Add support for DTR protocol mtd: spi-nor-core: prepare BFPT parsing for JESD216 rev D mtd: spi-nor-core: Get command opcode extension type from BFPT mtd: spi-nor-core: Parse xSPI Profile 1.0 table mtd: spi-nor-core: Prepare Read SR and FSR for Octal DTR mode mtd: spi-nor-core: Enable octal DTR mode when possible mtd: spi-nor-core: Do not make invalid quad enable fatal mtd: spi-nor-core: Detect Soft Reset sequence support from BFPT mtd: spi-nor-core: Perform a Soft Reset on shutdown mtd: spi-nor-core: Perform a Soft Reset on boot mtd: spi-nor-core: Add support for Cypress Semper flash mtd: spi-nor-core: Allow using Micron mt35xu512aba in Octal DTR mode
configs/x530_defconfig | 1 + drivers/mtd/spi/Kconfig | 42 + drivers/mtd/spi/sf_internal.h | 1 + drivers/mtd/spi/sf_probe.c | 8 + drivers/mtd/spi/spi-nor-core.c | 1345 ++++++++++++++++++++++++++------ drivers/mtd/spi/spi-nor-ids.c | 7 +- drivers/mtd/spi/spi-nor-tiny.c | 22 - drivers/spi/cadence_qspi.c | 87 ++- drivers/spi/cadence_qspi.h | 15 +- drivers/spi/cadence_qspi_apb.c | 286 ++++++- drivers/spi/mtk_snfi_spi.c | 3 +- drivers/spi/spi-mem-nodm.c | 66 +- drivers/spi/spi-mem.c | 16 +- include/linux/mtd/spi-nor.h | 283 +++++-- include/spi-mem.h | 17 +- 15 files changed, 1827 insertions(+), 372 deletions(-)
-- 2.27.0