diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2019-04-23 16:02:15 -0600 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2019-05-15 16:01:48 +0000 |
| commit | 29150c83df8630a817e81eef593dd93fdb37b09f (patch) | |
| tree | 7b096a18165fc0723470c1e069cbe9b5e3436a7a /src/soc | |
| parent | cd51d7ced5a4996253c6dfc816ab7ef82533b2da (diff) | |
soc/amd/stoneyridge: Add ACPI D3Cold support for SD Controller
We need to support entering D3Cold from the OS to work around a bug in
the SDHC where the data lines get stuck always reading zeros.
BUG=b:122749418
TEST=Verified the linux kernel can transition between D3 and D0. Also
verified that the device can suspend and resume and continue to have a
functioning SD controller after.
Change-Id: Ifbf48f20c03a752ce3ff773296b536e92db16a62
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32433
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/amd/stoneyridge/acpi/sb_pci0_fch.asl | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/src/soc/amd/stoneyridge/acpi/sb_pci0_fch.asl b/src/soc/amd/stoneyridge/acpi/sb_pci0_fch.asl index 15e4d2f122..1334df11c4 100644 --- a/src/soc/amd/stoneyridge/acpi/sb_pci0_fch.asl +++ b/src/soc/amd/stoneyridge/acpi/sb_pci0_fch.asl @@ -56,6 +56,16 @@ Device(SBUS) { /* 0:14.7 - SD Controller */ Device(SDCN) { Name(_ADR, 0x00140007) + + Method(_PS0) { + FDDC(24, 0) + } + Method(_PS3) { + FDDC(24, 3) + } + Method(_PSC) { + Return(SDTD) + } } /* end SDCN */ Name(CRES, ResourceTemplate() { @@ -286,8 +296,9 @@ Field( SMIC, ByteAcc, NoLock, Preserve) { offset (0x1e70), /* SD D3 Control */ SDTD, 2, , 1, + SDPD, 1, + , 1, , 1, - , 2, SDRT, 1, SDSC, 1, @@ -433,7 +444,14 @@ Method(FDDC, 2, Serialized) /* todo Case(15) { STD0()} */ /* SATA */ Case(18) { U2D0()} /* EHCI */ Case(23) { U3D0()} /* XHCI */ -/* todo Case(24) { SDD0()} */ /* SD */ + Case(24) { /* SD */ + Store(0x00, SDTD) + Store(One, SDPD) + Store(SDDS, Local0) + while(LNotEqual(Local0,0x7)) { + Store(SDDS, Local0) + } + } } } else { /* put device into D3cold */ @@ -489,7 +507,14 @@ Method(FDDC, 2, Serialized) /* todo Case(15) { STD3()} */ /* SATA */ Case(18) { U2D3()} /* EHCI */ Case(23) { U3D3()} /* XHCI */ -/* todo Case(24) { SDD3()} */ /* SD */ + Case(24) { /* SD */ + Store(Zero, SDPD) + Store(SDDS, Local0) + while(LNotEqual(Local0,0x0)) { + Store(SDDS, Local0) + } + Store(0x03, SDTD) + } } /* Turn off Power */ if(LEqual(I0TD, 3)) { |