diff options
| author | Subrata Banik <subrata.banik@intel.com> | 2018-01-18 15:20:21 +0530 |
|---|---|---|
| committer | Subrata Banik <subrata.banik@intel.com> | 2018-01-24 13:26:40 +0000 |
| commit | a971254d6756b1bcb78d9ac7a98789e995792a7a (patch) | |
| tree | f42530a3b03d03dc6856b09321b418d7a4b04be5 /src/soc | |
| parent | d99f9d526f9e46442b1d0158d7f881202b293183 (diff) | |
soc/intel/cannonlake: Port SD Controller W/A from Intel Reference code
Solution: To do an additional config read to the SD controller
after the controller has been power gated (put to D3)
Change-Id: Ia2438c767332b0e2d413c71b06b052bf9ab4a96c
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/23313
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/cannonlake/acpi/scs.asl | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/soc/intel/cannonlake/acpi/scs.asl b/src/soc/intel/cannonlake/acpi/scs.asl index a9fd35e1b9..61f1739e86 100644 --- a/src/soc/intel/cannonlake/acpi/scs.asl +++ b/src/soc/intel/cannonlake/acpi/scs.asl @@ -51,23 +51,34 @@ Scope (\_SB.PCI0) { Device (SDXC) { Name (_ADR, 0x00140005) + Name (TEMP, 0) OperationRegion (SDPC, PCI_Config, 0x00, 0x100) Field (SDPC, WordAcc, NoLock, Preserve) { - Offset(0xA2), /* Device Power Gate config */ + Offset (0x84), /* PMECTRLSTATUS */ + PMCR, 16, + Offset (0xA2), /* PG_CONFIG */ , 2, - PGEN, 1 /* PGE - PG Enable */ + PGEN, 1, /* PG_ENABLE */ } Method (_PS0, 0, Serialized) { Store (0, PGEN) /* Disable PG */ + + /* Set Power State to D0 */ + And (PMCR, 0xFFFC, PMCR) + Store (PMCR, ^TEMP) } Method (_PS3, 0, Serialized) { Store (1, PGEN) /* Enable PG */ + + /* Set Power State to D3 */ + Or (PMCR, 0x0003, PMCR) + Store (PMCR, ^TEMP) } } /* Device (SDXC) */ } |