u-boot.git/include/spi-mem.h, branch master

mtd: spinand: Enhance the logic when picking a variant

2025-10-05T18:26:22+00:00

Currently the best variant picked in the first one in the list provided
in the manufacturer driver. This worked well while all operations where
performed at the same speed, but with the introduction of DTR transfers
this no longer works correctly.

Let's continue iterating over all the alternatives, even if we find a
match, keeping a reference over the theoretically fastest
operation. Only at the end we can tell which variant is the best.

This logic happening only once at boot.

The patch is based on linux commit
666c299be696 (mtd: spinand: Enhance the logic when picking a variant)
created by Miquel Raynal 

The code was a bit restricted in the functionality since not all
required functionality is supported in the u-boot.

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Frieder Schrempf 
Signed-off-by: Michael Trimarchi

spi: spi-mem: Extend SPI MEM ops to match Linux 6.16

2025-10-05T18:25:37+00:00

This pulls in multiple changes from the Linux kernel in order to keep
the code in sync. This also fixes octal mode support.

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Frieder Schrempf 
Signed-off-by: Michael Trimarchi

Revert "mem: spi-mem: add declaration for spi_mem_default_supports_op"

2025-01-22T15:52:22+00:00

We have a duplicate declaration of spi_mem_default_supports_op() which
was added twice, first with commit af6266c1c27a ("mem: spi-mem: add
declaration for spi_mem_default_supports_op") for v2021.04, and again
with commit 2299076e34f8 ("spi: spi-mem: export
spi_mem_default_supports_op()") for v2021.07.

The first commit is reverted here, because the second better matches the
definition and has a better place in the declaration order.

Note: Linux declares this in a different section of spi-mem.h which is
disabled in U-Boot through `#ifndef __UBOOT__`.

This reverts commit af6266c1c27add8beac7f3365c00b3525a9012c4.

Signed-off-by: Alexander Dahl

headers: don't depend on errno.h being available

2024-01-24T16:12:11+00:00

These headers follow the pattern:

| #if CONFIG_IS_ENABLED(FANCY_FEATURE)
|   void foo(void);
| #else
|   static inline void foo(void) { return -ENOSYS; }
| #endif

In the #else path ENOSYS is used, however linux/errno.h is not included.
If errno.h has not been included already the compiler errors out even
if the inline function is not referenced.

Make those headers self contained.

Signed-off-by: Max Krummenacher 
Reviewed-by: Francesco Dolcini 
Reviewed-by: Tom Rini

spi-mem: Add dirmap API from Linux

2022-09-13T16:08:40+00:00

This adds the dirmap API originally introduced in
Linux commit aa167f3fed0c
("spi: spi-mem: Add a new API to support direct mapping").
This also includes several follow-up patches and fixes.

Changes from Linux include:
* Added Kconfig option
* Changed struct device to struct udevice
* Changed struct spi_mem to struct spi_slave

This patch is obtained from the following patch
https://patchwork.ozlabs.org/project/uboot/patch/20210205043924.149504-3-seanga2@gmail.com/
The corresponding Linux kernel SHA1 is aa167f3fed0c.

Signed-off-by: Chin-Ting Kuo 
Signed-off-by: Sean Anderson 
Acked-by: Pratyush Yadav

spi: spi-mem: add spi_mem_dtr_supports_op()

2021-06-28T06:26:06+00:00

spi_mem_default_supports_op() rejects DTR ops by default to ensure that
the controller drivers that haven't been updated with DTR support
continue to reject them. It also makes sure that controllers that don't
support DTR mode at all (which is most of them at the moment) also
reject them.

This means that controller drivers that want to support DTR mode can't
use spi_mem_default_supports_op(). Driver authors have to roll their own
supports_op() function and mimic the buswidth checks. Or even worse,
driver authors might skip it completely or get it wrong.

Add spi_mem_dtr_supports_op(). It provides a basic sanity check for DTR
ops and performs the buswidth requirement check. Move the logic for
checking buswidth in spi_mem_default_supports_op() to a separate
function so the logic is not repeated twice.

Signed-off-by: Pratyush Yadav 
Acked-by: Jagan Teki

spi: spi-mem: export spi_mem_default_supports_op()

2021-06-28T06:25:31+00:00

Controllers can use this function to perform basic sanity checking on
the spi-mem op.

Reviewed-by: Sean Anderson 
Signed-off-by: Pratyush Yadav 
Reviewed-by: Jagan Teki

spi: spi-mem: allow specifying a command's extension

2021-06-28T06:25:11+00:00

In xSPI mode, flashes expect 2-byte opcodes. The second byte is called
the "command extension". There can be 3 types of extensions in xSPI:
repeat, invert, and hex. When the extension type is "repeat", the same
opcode is sent twice. When it is "invert", the second byte is the
inverse of the opcode. When it is "hex" an additional opcode byte based
is sent with the command whose value can be anything.

So, make opcode a 16-bit value and add a 'nbytes', similar to how
multiple address widths are handled.

All usages of sizeof(op->cmd.opcode) also need to be changed to be
op->cmd.nbytes because that is the actual indicator of opcode size.

Signed-off-by: Pratyush Yadav 
Reviewed-by: Jagan Teki

spi: spi-mem: allow specifying whether an op is DTR or not

2021-06-28T06:23:48+00:00

Each phase is given a separate 'dtr' field so mixed protocols like
4S-4D-4D can be supported.

Signed-off-by: Pratyush Yadav 
Reviewed-by: Jagan Teki

spi: Return -ENOSYS when system call is not available

2021-04-06T04:33:19+00:00

Update spi_controller_dma_map_mem_op_data() to use -ENOSYS, which is the
correct error code for U-Boot.

Signed-off-by: Simon Glass