diff options
| author | Subrata Banik <subrata.banik@intel.com> | 2018-01-18 15:13:53 +0530 |
|---|---|---|
| committer | Subrata Banik <subrata.banik@intel.com> | 2018-01-24 13:26:28 +0000 |
| commit | d99f9d526f9e46442b1d0158d7f881202b293183 (patch) | |
| tree | b887b25cb6aa2d0427025044f48844962e23941c /src/soc | |
| parent | b7d79cddf0287a2e925d2003ef8d0cde6bbbae2a (diff) | |
soc/intel/cannonlake: Port eMMC controller W/A from Intel Reference code
Solution: To do an additional config read to the eMMC controller
after the controller has been power gated (put to D3)
Change-Id: Ieac939c9108e84ba6c7c26b1a49aaf829d8456b7
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/23312
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 | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/src/soc/intel/cannonlake/acpi/scs.asl b/src/soc/intel/cannonlake/acpi/scs.asl index e993ddbbf9..a9fd35e1b9 100644 --- a/src/soc/intel/cannonlake/acpi/scs.asl +++ b/src/soc/intel/cannonlake/acpi/scs.asl @@ -1,7 +1,7 @@ /* * This file is part of the coreboot project. * - * Copyright (C) 2017 Intel Corporation. + * Copyright (C) 2017-2018 Intel Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -17,21 +17,33 @@ Scope (\_SB.PCI0) { /* EMMC */ Device(PEMC) { Name(_ADR, 0x001A0000) + Name (TEMP, 0) OperationRegion(SCSR, PCI_Config, 0x00, 0x100) Field(SCSR, WordAcc, NoLock, Preserve) { - Offset(0xA2), // 0xA2, Device PG config + Offset (0x84), /* PMECTRLSTATUS */ + PMCR, 16, + Offset (0xA2), /* PG_CONFIG */ , 2, - PGEN, 1 // [BIT2] PGE - PG Enable + PGEN, 1, /* PG_ENABLE */ } Method(_PS0, 0, Serialized) { - Stall (50) // Sleep 50 ms + Stall (50) // Sleep 50 us + 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) } } |