diff options
| author | Nico Huber <nico.h@gmx.de> | 2018-02-04 15:52:18 +0100 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-04-05 15:58:37 +0000 |
| commit | 8e50b6d63dd05bbc23e2d55a35df77ddb1ba4575 (patch) | |
| tree | ef1cde40dfc31d3b2693eda79b59509d89656eb7 /src/southbridge/intel/bd82x6x/lpc.c | |
| parent | 385e8fc5a940da9933387b7557e5031f4c4387d2 (diff) | |
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 <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/23587
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nicola Corna <nicola@corna.info>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/southbridge/intel/bd82x6x/lpc.c')
| -rw-r--r-- | src/southbridge/intel/bd82x6x/lpc.c | 28 |
1 files changed, 28 insertions, 0 deletions
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) || |