| Age | Commit message (Collapse) | Author |
|---|
|
SPI_ATOMIC_SEQUENCING was added to accomodate spi flash controllers with
the ability to perform tx and rx of flash command and response at the
same time. Instead of introducing this notion at SPI flash driver layer,
clean up the interface to SPI used by flash.
Flash uses a command-response kind of communication. Thus, even though
SPI is duplex, flash command needs to be sent out on SPI bus and then
flash response should be received on the bus. Some specialized x86
flash controllers are capable of handling command and response in a
single transaction.
In order to support all the varied cases:
1. Add spi_xfer_vector that takes as input a vector of SPI operations
and calls back into SPI controller driver to process these operations.
2. In order to accomodate flash command-response model, use two vectors
while calling into spi_xfer_vector -- one with dout set to
non-NULL(command) and other with din set to non-NULL(response).
3. For specialized SPI flash controllers combine two successive vectors
if the transactions look like a command-response pair.
4. Provide helper functions for common cases like supporting only 2
vectors at a time, supporting n vectors at a time, default vector
operation to cycle through all SPI op vectors one by one.
BUG=chrome-os-partner:59832
BRANCH=None
TEST=Compiles successfully
Change-Id: I4c9e78c585ad95c40c0d5af078ff8251da286236
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17681
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
|
|
1. Define a new structure spi_ctrlr that allows platforms to define
callbacks for spi operations (claim bus, release bus, transfer).
2. Add a new member (pointer to spi_ctrlr structure) in spi_slave
structure which will be initialized by call to spi_setup_slave.
3. Define spi_claim_bus, spi_release_bus and spi_xfer in spi-generic.c
which will make appropriate calls to ctrlr functions.
BUG=chrome-os-partner:59832
BRANCH=None
TEST=Compiles successfully
Change-Id: Icb2326e3aab1e8f4bef53f553f82b3836358c55e
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17684
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
|
|
For spi_setup_slave, instead of making the platform driver return a
pointer to spi_slave structure, pass in a structure pointer that can be
filled in by the driver as required. This removes the need for platform
drivers to maintain a slave structure in data/CAR section.
BUG=chrome-os-partner:59832
BRANCH=None
TEST=Compiles successfully
Change-Id: Ia15a4f88ef4dcfdf616bb1c22261e7cb642a7573
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17683
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
|
|
1. Use size_t instead of unsigned int for bytes_out and bytes_in.
2. Use const attribute for spi_slave structure passed into xfer, claim
bus and release bus functions.
BUG=chrome-os-partner:59832
BRANCH=None
TEST=Compiles successfully
Change-Id: Ie70b3520b51c42d750f907892545510c6058f85a
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17682
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
|
|
Asserts are only fatal if CONFIG_FATAL_ASSERTS is enabled in Kconfig.
By default this is disabled, so the assert is generally just a printf.
Die if someone decides to pass in an invalid bus number for some reason.
Addresses coverity issue 1349858 - Out-of-bounds read
Signed-off-by: Martin Roth <martinroth@google.com>
Change-Id: I9d79bc336cbbfde31f655cfd271f101e7a90ab1b
Reviewed-on: https://review.coreboot.org/17484
Reviewed-by: Nico Huber <nico.h@gmx.de>
|
|
flash_programmer_probe is a property of the spi flash driver and does
not belong in the spi_slave structure. Thus, make
spi_flash_programmer_probe a callback from the spi_flash_probe
function. Logic still remains the same as before (order matters):
1. Try spi_flash_programmer_probe without force option
2. Try generic flash probing
3. Try spi_flash_programmer_probe with force option
If none of the above steps work, fail probing. Flash controller is
expected to honor force option to decide whether to perform specialized
probing or to defer to generic probing.
BUG=None
BRANCH=None
TEST=Compiles successfully
Change-Id: I4163593eea034fa044ec2216e56d0ea3fbc86c7d
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17465
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
|
|
Provide a default value of 0 in drivers/spi as there weren't
default values aside from specific mainboards and arch/x86.
Remove any default 0 values while noting to keep the option's
default to 0.
BUG=chrome-os-partner:56151
Change-Id: If9ef585e011a46b5cd152a03e41d545b36355a61
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/16192
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Martin Roth <martinroth@google.com>
|
|
BRANCH=none
BUG=none
TEST=boot oak to kernel on rev1
Change-Id: I0773c81398df445aec16bcfcd0c5a8fe5a588b5c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: ae15c42c2f7d9c2a716e5b6098d85e17279f5eae
Original-Change-Id: I65abf810d35ae5e7156cf6f5730117e690183d18
Original-Signed-off-by: mtk05962 <bayi.cheng@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292693
Original-Commit-Ready: Yidi Lin <yidi.lin@mediatek.com>
Original-Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/13102
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
|
|
BUG=none
TEST=emerge-oak coreboot
BRANCH=none
[pg: split into multiple commits]
Change-Id: I82d982b40dd0bfaa7770a6b08c70b20337a46955
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 41acc14e9fe54924d20e4e5a2d1519251f0e1c87
Original-Change-Id: I2559be4191da9af523944563729171bd92a86cd0
Original-Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292661
Original-Commit-Ready: Yidi Lin <yidi.lin@mediatek.com>
Original-Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/12611
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
|
