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2017-08-17intel/common/block/fast_spi: Add config option to disable write statusDuncan Laurie
Chrome OS systems rely on the write status register to enable/disable flash write protection and disabling this opcode breaks the ability to enable or disable write protection with flashrom. Add a configure option for this feature that will disable the opcode for Write Status commands unless CONFIG_CHROMEOS is enabled. Tested to ensure that a default build without CONFIG_CHROMEOS has this option enabled while a build with CONFIG_CHROMEOS does not. Also ensured that when this option is disabled (for Chrome OS) then flashrom can be used with the --wp-enable and --wp-disable commands, depending on the state of the external write protect pin. Change-Id: Ia2ef3c3b1e10fba2c437e083f3537022f1fce84a Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/21021 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Subrata Banik <subrata.banik@intel.com>
2017-05-01soc/intel/common/block: Add Intel common FAST_SPI codeBarnali Sarkar
Create Intel Common FAST_SPI Controller code. This code contains the code for SPI initialization which has the following programming - * Get BIOS Rom Region Size * Enable SPIBAR * Disable the BIOS write protect so write commands are allowed * Enable SPI Prefetching and Caching. * SPI Controller register offsets in the common header fast_spi.h * Implement FAST_SPI read, write, erase APIs. Change-Id: I046e3b30c8efb172851dd17f49565c9ec4cb38cb Signed-off-by: Barnali Sarkar <barnali.sarkar@intel.com> Reviewed-on: https://review.coreboot.org/18557 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com>