diff options
| author | Felix Held <felix-coreboot@felixheld.de> | 2024-10-16 20:17:18 +0200 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2024-11-07 15:09:48 +0000 |
| commit | c6f60b1ddf372db04eba5b9e177d8cbe0100f3ab (patch) | |
| tree | b938855d796991ee6a5b503e2191a8229bcc7d17 /src/drivers/spi | |
| parent | ade5b9dc4837cdca17358b021c840d4f90383b40 (diff) | |
drivers/spi/spi_flash: introduce 'spi_flash_cmd_multi'
A following patch that adds some support for reading the serial flash
discoverable parameters (SFDP) data structures needs to send more than
just the one command byte that 'spi_flash_cmd' supports. To be able to
do this, introduce the 'spi_flash_cmd_multi' function which supports
sending multiple bytes before reading back some bytes. The prototype is
added to drivers/spi/spi_flash_internal.h since only other files in the
same directory are supposed to be using that function.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I1f3872463249240c0a32e2825e4302894e856b2e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84789
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/drivers/spi')
| -rw-r--r-- | src/drivers/spi/spi_flash.c | 10 | ||||
| -rw-r--r-- | src/drivers/spi/spi_flash_internal.h | 4 |
2 files changed, 14 insertions, 0 deletions
diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c index 11597c6c1d..6ecd29f773 100644 --- a/src/drivers/spi/spi_flash.c +++ b/src/drivers/spi/spi_flash.c @@ -129,6 +129,16 @@ int spi_flash_cmd(const struct spi_slave *spi, u8 cmd, void *response, size_t le return ret; } +int spi_flash_cmd_multi(const struct spi_slave *spi, const u8 *dout, size_t bytes_out, + void *din, size_t bytes_in) +{ + int ret = do_spi_flash_cmd(spi, dout, bytes_out, din, bytes_in); + if (ret) + printk(BIOS_WARNING, "SF: Failed to send command %02x: %d\n", dout[0], ret); + + return ret; +} + /* TODO: This code is quite possibly broken and overflowing stacks. Fix ASAP! */ #pragma GCC diagnostic push #if defined(__GNUC__) && !defined(__clang__) diff --git a/src/drivers/spi/spi_flash_internal.h b/src/drivers/spi/spi_flash_internal.h index 131c32bec8..d0f32c52ed 100644 --- a/src/drivers/spi/spi_flash_internal.h +++ b/src/drivers/spi/spi_flash_internal.h @@ -32,6 +32,10 @@ /* Send a single-byte command to the device and read the response */ int spi_flash_cmd(const struct spi_slave *spi, u8 cmd, void *response, size_t len); +/* Send a multi-byte command to the device and read the response */ +int spi_flash_cmd_multi(const struct spi_slave *spi, const u8 *dout, size_t bytes_out, + void *din, size_t bytes_in); + /* * Send a multi-byte command to the device followed by (optional) * data. Used for programming the flash array, etc. |