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Whenever spi_xfer is called and whenver it's implemented, the natural unit for
the amount of data being transfered is bytes. The API expected things to be
expressed in bits, however, which led to a lot of multiplying and dividing by
eight, and checkes to make sure things were multiples of eight. All of that
can now be removed.
BUG=None
TEST=Built and booted on link, falco, peach_pit and nyan and looked for SPI
errors in the firmware log. Built for rambi.
BRANCH=None
Change-Id: I02365bdb6960a35def7be7a0cd1aa0a2cc09392f
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/192049
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
[km: cherry-pick from chromium]
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6175
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
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The spi_flash_probe and and spi_setup_slave functions each took a max_hz
parameter and a spi_mode parameter which were never used.
BUG=None
TEST=Built for link, falco, rambi, nyan.
BRANCH=None
Change-Id: I3a2e0a9ab530bcc0f722f81f00e8c7bd1f6d2a22
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/192046
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
[km: cherry-pick from chromium]
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6174
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
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The workaround of re-opening device in exynos_spi_read has been fixed by the new
correct open/close and xfer procedure. It's safe to be removed now.
Change-Id: I6b1bf717c916903999a137998a578b0a866829bd
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3715
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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Switch spi_xfer and exynos_spi_read to use the new spi_rx_tx function.
Change-Id: I01ab43509df1319672bec30dd111f98001d655d0
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3714
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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The SPI driver (exynos_spi_rx_tx) was implemented with only "read" ability and
only full-duplex mode. To communicate with devices like ChromeOS EC, we need
both output (tx) and half-duplex (searching frame header) features.
This commit adds a spi_rx_tx that can handle all cases we need.
Change-Id: I6aba3839eb0711d49c143dc0620245c0dfe782d8
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3713
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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The original Exynos SPI open/close procedure was copied from U-Boot SPL with
some assumptions that only works in SPL stage. For example, it tries to always
work in 4-byte transmission mode with only RX data is swapped, and claims a
packet for initial address command (and with incorrect size).
This commit revises open/close and reset so only the required SPI registers are
configured.
Change-Id: Ieba1f03d80a8949c39a6658218831ded39853744
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3712
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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Fill the SPI device parameters for spi_setup_slave on Exynos 5420.
Change-Id: I10b4b9e6cfe46d7bfa34e80e3727c7e7da99ba9d
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3711
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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The SPI module in Exynos 5420 didn't follow Coreboot's SPI API standard
(spi-generic.h) and will be a problem when we want to share SPI drivers.
This commit replaces exynos_spi_* by spi_* functions.
Note, exynos_spi_read is kept and changed to a static function because its usage
is different from the standard API "spi_xfer".
Change-Id: I6de301bc6b46a09f87b0336c60247fedbe844ca3
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3710
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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Remove unused header and constant definition in SPI module.
Change-Id: I339e603f48186e4a356e83518b0d0b4c907f11b8
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3709
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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Some initialization / shutdown commands should be paired correctly in a SPI I/O
session. For example, setting CS should be enabled and disabled in each read;
and the bus width (byte or word) should be configured only when opening /
closing the SPI device.
Change-Id: Ie56b1c3a6df7d542f7ea8f1193ac435987f937ba
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3706
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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This change creates an exynos5420 directory with code that will eventually
implement support for the exynos5420 cpu from Samsung. Currently it's a copy
of the exynos5250 directory with the name changed. There are going to be some
problems where headers in src/cpu/samsung/exynos-common include headers in the
exynos5250 directory directly.
Change-Id: Ia8d7244310d32499238bbc171c0c668ec48178e1
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3644
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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