From 8e50b6d63dd05bbc23e2d55a35df77ddb1ba4575 Mon Sep 17 00:00:00 2001 From: Nico Huber Date: Sun, 4 Feb 2018 15:52:18 +0100 Subject: sb/intel/bd82x6x: Let mainboard override SPI opmenu For some SPI chips (e.g. those with AAI writes), the default OPMENU definitions don't work well. Thus, provide an option to override the defaults in the devicetree. Writing the OPMENU now happens in ramstage instead of the SMM finalize handler. If you let coreboot call the finalize handler, nothing should change. If you call the handler from your payload, OTOH, the OPMENU might have been changed in between, so be careful what you lock. Change-Id: I9ceaf5b2d11365e21a2bebc9c5def1fcf0be8aad Signed-off-by: Nico Huber Reviewed-on: https://review.coreboot.org/23587 Tested-by: build bot (Jenkins) Reviewed-by: Nicola Corna Reviewed-by: Arthur Heymans --- src/southbridge/intel/bd82x6x/lpc.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'src/southbridge/intel/bd82x6x/lpc.c') diff --git a/src/southbridge/intel/bd82x6x/lpc.c b/src/southbridge/intel/bd82x6x/lpc.c index 67570cd0be..c57eeca769 100644 --- a/src/southbridge/intel/bd82x6x/lpc.c +++ b/src/southbridge/intel/bd82x6x/lpc.c @@ -829,6 +829,34 @@ static void southbridge_fill_ssdt(device_t device) static void lpc_final(struct device *dev) { + u16 spi_opprefix = SPI_OPPREFIX; + u16 spi_optype = SPI_OPTYPE; + u32 spi_opmenu[2] = { SPI_OPMENU_LOWER, SPI_OPMENU_UPPER }; + + /* Configure SPI opcode menu; devicetree may override defaults. */ + const config_t *const config = dev->chip_info; + if (config && config->spi.ops[0].op) { + unsigned int i; + + spi_opprefix = 0; + spi_optype = 0; + spi_opmenu[0] = 0; + spi_opmenu[1] = 0; + for (i = 0; i < sizeof(spi_opprefix); ++i) + spi_opprefix |= config->spi.opprefixes[i] << i * 8; + for (i = 0; i < sizeof(spi_opmenu); ++i) { + spi_optype |= + config->spi.ops[i].is_write << 2 * i | + config->spi.ops[i].needs_address << (2 * i + 1); + spi_opmenu[i / 4] |= + config->spi.ops[i].op << (i % 4) * 8; + } + } + RCBA16(0x3894) = spi_opprefix; + RCBA16(0x3896) = spi_optype; + RCBA32(0x3898) = spi_opmenu[0]; + RCBA32(0x389c) = spi_opmenu[1]; + /* Call SMM finalize() handlers before resume */ if (IS_ENABLED(CONFIG_HAVE_SMI_HANDLER)) { if (IS_ENABLED(CONFIG_INTEL_CHIPSET_LOCKDOWN) || -- cgit v1.2.3