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lspcon_i2c_spi.c: Add SPI-master support for PS17{5,6}

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This adds support for the Parade lspcon usb-c to HDMI protocol
translater part that is i2c-controlled. The support allows the
host to reach the SPI ROM that hangs off the part where it
stores its firmware.

Usage is as follows:
	flashrom -p lspcon_i2c_spi:bus=X
	where X is the bus number.

BUG=b:148746232
BRANCH=none
TEST=tested with following commands, read/write/erase works good.
	flashrom -p lspcon_i2c_spi:bus=7 -r /tmp/foo;
	flashrom -p lspcon_i2c_spi:bus=7 -E;
	flashrom -p lspcon_i2c_spi:bus=7 -w /tmp/foo;

Change-Id: I039e683252cfaf1ffef8694a3e8081b1b6b944f7
Signed-off-by: Shiyu Sun <sshiyu@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/39687
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
This commit is contained in:
Shiyu Sun
2020-03-19 14:37:57 +11:00
committed by Edward O'Callaghan
parent dc2c83bbc7
commit 13a2ef6cbd
6 changed files with 556 additions and 0 deletions
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5
meson.build
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@@ -63,6 +63,7 @@ config_satasii = get_option('config_satasii')
config_serprog = get_option('config_serprog')
config_usbblaster_spi = get_option('config_usbblaster_spi')
config_stlinkv3_spi = get_option('config_stlinkv3_spi')
config_lspcon_i2c_spi = get_option('config_lspcon_i2c_spi')
cargs = []
deps = []
@@ -283,6 +284,10 @@ if config_stlinkv3_spi
srcs += 'stlinkv3_spi.c'
cargs += '-DCONFIG_STLINKV3_SPI=1'
endif
if config_lspcon_i2c_spi
srcs += 'lspcon_i2c_spi.c'
cargs += '-DCONFIG_LSPCON_I2C_SPI=1'
endif
# bitbanging SPI infrastructure
if config_bitbang_spi