Perform EC read and write via SystemIO when EmbeddedControl is
unavailable. Not properly tested yet.
Re-sync against coreboot port.
Does not yet handle SMM traps. In-progress.
Cc: Sai Chaganty <rangasai.v.chaga...@intel.com>
Cc: Isaac Oram <isaac.w.o...@intel.com>
Cc: Nate DeSimone <nathaniel.l.desim...@intel.com>
Cc: Chasel Chiu <chasel.c...@intel.com>
Signed-off-by: Benjamin Doron <benjamin.doro...@gmail.com>
---
.../Acpi/BoardAcpiTables.inf | 4 +
.../AspireVn7Dash572G/Acpi/BoardSsdt.asl | 29 +++-
.../AspireVn7Dash572G/Acpi/battery.asl | 11 +-
.../AspireVn7Dash572G/Acpi/ec.asl | 130 ++++++++--------
.../AspireVn7Dash572G/Acpi/eclib.asl | 141 ++++++++++++++++++
.../AspireVn7Dash572G/Acpi/mainboard.asl | 6 +-
.../AspireVn7Dash572G/Acpi/thermal.asl | 16 +-
7 files changed, 256 insertions(+), 81 deletions(-)
create mode 100644
Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/eclib.asl
diff --git
a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/BoardAcpiTables.inf
b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/BoardAcpiTables.inf
index 806c0d2575c8..9a31b400a35e 100644
---
a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/BoardAcpiTables.inf
+++
b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/BoardAcpiTables.inf
@@ -13,5 +13,9 @@
MODULE_TYPE = USER_DEFINED
VERSION_STRING = 1.0
+[Packages]
+ KabylakeOpenBoardPkg/OpenBoardPkg.dec
+ MdePkg/MdePkg.dec
+
[Sources]
BoardSsdt.asl
diff --git
a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/BoardSsdt.asl
b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/BoardSsdt.asl
index cdec0434883e..d1609131ecf7 100644
--- a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/BoardSsdt.asl
+++ b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/BoardSsdt.asl
@@ -6,17 +6,44 @@
**/
+#include <IndustryStandard/Acpi63.h>
+
DefinitionBlock (
"Board.aml",
"SSDT",
- 0x02,
+ EFI_ACPI_6_3_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_REVISION,
"ACRSKL",
"AcerSKL ",
0x20141018
)
{
+ External (SSMP, IntObj)
+ External (SMIF, IntObj)
External (\MDBG, MethodObj)
+ // SW SMI data port
+ OperationRegion (DPRT, SystemIO, 0xB3, 1)
+ Field (DPRT, ByteAcc, Lock, Preserve)
+ {
+ SSDP, 8
+ }
+
+ Name (ESMI, 0xDD) // TODO: Patch at runtime
+ Method (TRPS, 3, Serialized)
+ {
+ \DBGH (Concatenate ("SMIF: ", ToHexString (Arg0)))
+ \DBGH (Concatenate ("Param0: ", ToHexString (Arg1)))
+ \DBGH (Concatenate ("Param1: ", ToHexString (Arg2)))
+
+ Local0 = Arg1
+ Local0 |= (Arg2 << 4)
+ \DBGH (Concatenate ("Local0: ", ToHexString (Local0)))
+
+ SMIF = Arg0
+ SSDP = Local0
+ SSMP = ESMI
+ }
+
// Debug print helper
Method (DBGH, 1)
{
diff --git
a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/battery.asl
b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/battery.asl
index 5ae4bdca89d5..1bf652c4a01e 100644
--- a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/battery.asl
+++ b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/battery.asl
@@ -184,11 +184,17 @@ Method (GBIF, 3, NotSerialized)
Local7 = EBSN
#endif
Name (SERN, Buffer (0x06) { " " })
+ /* Convert hex to decimal.
+ * - There appears to be a bug in the vendor's implementation:
+ * The correct answer has, or can have, 5 digits, so Local6 = 5.
+ * Also see "SERN" buffer.
+ * - Userspace prints reversed serial number?
+ */
Local6 = 4
While (Local7)
{
Divide (Local7, 10, Local5, Local7)
- SERN[Local6] = (Local5 + 0x30) // Add ASCII 0x30 to get character
+ SERN[Local6] = (Local5 + 0x30) // Add 0x30 to get numeric character
Local6--
}
@@ -310,7 +316,7 @@ Method (GBST, 4, NotSerialized) // All on one page
If (Arg2)
{
Local1 *= Local3
- Local1 /= 1000 /* Remainder ignored */
+ Local1 /= 1000 /* Remainder ignored by vendor */
}
}
Else
@@ -382,6 +388,7 @@ Device (BAT0)
Method (_BIF, 0, NotSerialized) // _BIF: Battery Information
{
+ /* Bitwise AND by vendor is lossy? */
Local6 = B0ST
Local7 = 20
While (Local6 && Local7)
diff --git a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/ec.asl
b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/ec.asl
index df71dd69b491..b8f0dba1597f 100644
--- a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/ec.asl
+++ b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/ec.asl
@@ -5,18 +5,33 @@
**/
-/* Global TODO: (externally: Optimus GC6 and GPS)
+/*
+ * Global TODO: (externally: Optimus GC6 and GPS)
* - TRPS: This is SMI 0xDD, likely in SmmOemDriver. This SW SMI adds to and
executes
* a table of function pointers produced throughout the OEM
'value-add' stack.
+ * - Arg0 - "SFUN" - is index into "$FNC" pointer table? It's easier to
+ * correlate *CommonService use: Offset 13 creates TRPS handlers.
+ * - Known functions:
+ * - 0x80 calls offset 0 in ACER_BOOT_DEVICE_SERVICE_PROTOCOL_GUID.
+ * - NB: efiXplorer can miss InstallProtocolInterface() when
Interface is local
+ * - 0x81 toggles Intel Dynamic Acceleration in IA32_MISC_ENABLE MSR.
+ * - 0x82 does switch on "OSYS" to set EC byte. Suspect this is for
OS features.
+ * (A CVE exists in the vendor code only if it never sets the offset
in the buffer.)
+ * - RBEC/WBEC/MBEC: This is SMI 0xDD, "functions" 0x10, 0x11 and 0x12 in
SmmKbcDriver,
+ * added into SmmCommonService table at its protocol notify. Performs
read, write
+ * and read-modify-write from buffer. We will use ACPI instead.
* - WMI: This is likely SMI 0xD0 in A01WMISmmCallback. This SW SMI likely
uses the WMI
* object and consumes the OEM 'value-add' stack for EC and presumably
the A01*
- * OEM/ODM 'value-add' stack.
+ * OEM/ODM 'value-add' stack. An SSDT contains the device and EC0
provides "GCMS"
+ * and "GOTS" method helpers.
*
- * Generally, more reversing is needed.
+ * Generally, more information is needed.
+ * TODO: Restore stripped features using reference code (except, check
BoardAcpiDxe first)
+ * and implement more board features: lid and touchpad trigger wake from
S3,
+ * Fn-Ctrl swap, sticky Fn keys and always-on USB charger.
*/
-/* TODO: Implement more features around reference code (except, check
BoardAcpiDxe first) */
-// TODO: Enable and test
+// TODO/TEST
#undef LGMR_ENABLED
// "DIDX" - "DeviceIdX" is uninitialised, cannot use "BRTN" method yet
@@ -40,17 +55,7 @@ Device (\_SB.PCI0.LPCB.EC0)
IO (Decode16, 0x66, 0x66, 0, 1)
})
- OperationRegion (ECO1, SystemIO, 0x62, 1)
- Field (ECO1, ByteAcc, Lock, Preserve)
- {
- PX62, 8
- }
-
- OperationRegion (ECO2, SystemIO, 0x66, 1)
- Field (ECO2, ByteAcc, Lock, Preserve)
- {
- PX66, 8
- }
+ #include "eclib.asl"
#ifdef LGMR_ENABLED
OperationRegion (ECMB, SystemMemory, LGMR, 0x200)
@@ -84,10 +89,12 @@ Device (\_SB.PCI0.LPCB.EC0)
EX3G, 1, /* 3G */
, 3,
RFEX, 1, /* RF present */
-#if 0 // Merely a guess
- Offset (0x55),
- BTH0, 8, /* Battery threshold? TODO: Actually diff in modified
vendor FW */
-#endif
+/*
+ * NOTE: Some reverse engineering, as well as corroborating vendor's hidden
SetupUtility
+ * options with the EC's memory space, suggests that offset 0x55 might be the
battery
+ * threshold
+ * - TODO: Actually diff changes in modified vendor FW
+ */
Offset (0x57),
, 7,
AHKB, 1, /* Hotkey triggered */
@@ -204,14 +211,19 @@ Device (\_SB.PCI0.LPCB.EC0)
{
TINI ()
EOSS = 0x05
-// OSIN ()
+ // OSYS retrieved by SMM, Arg3 is unused
+// TRPS (0x82, 1, 0)
- /* Other pages return valid data too, but this seems to be the page
+ /*
+ * Other pages return valid data too, but this seems to be the page
* we are expecting - persistently in ectool dump with vendor firmware
- * FIXME: Contents of other pages? */
+ * FIXME: Contents of other pages?
+ */
ETID = 0x20
}
}
+
+ /* iGFX RC method call stripped */
}
Method (TINI, 0, NotSerialized)
@@ -223,10 +235,8 @@ Device (\_SB.PCI0.LPCB.EC0)
}
Else
{
- /* WBEC: Called SMI function 0x11 */
-// EC_WRITE (0x92, 0) // ETAF = 0
- /* MBEC: Called SMI function 0x12 */
-// MBEC (0x10, 0xFD, 0x02) // ETEE = 1
+ WBEC (0x92, 0) // ETAF = 0
+ MBEC (0x10, 0xFD, 0x02) // ETEE = 1
}
}
@@ -234,10 +244,8 @@ Device (\_SB.PCI0.LPCB.EC0)
Method (ECPS, 1, NotSerialized) // _PTS: Prepare To Sleep
{
ECSS = Arg0
-// COSI = OSYS
-// SPR1 = Arg0
- /* TRPS: Generic SMI trap handler */
-// TRPS (0x82, 0x02)
+ // OSYS retrieved by SMM
+// TRPS (0x82, 0x02, Arg0)
If ((Arg0 == 3) || (Arg0 == 4))
{
RFST = RFEX
@@ -250,38 +258,23 @@ Device (\_SB.PCI0.LPCB.EC0)
EOSS = Arg0
TINI ()
Notify (BAT0, 0x81) // Information Change
-// COSI = OSYS
-// SPR1 = Arg0
- /* TRPS: Generic SMI trap handler */
-// TRPS (0x82, 0x03)
+ // OSYS retrieved by SMM
+// TRPS (0x82, 0x03, Arg0)
If ((Arg0 == 3) || (Arg0 == 4))
{
RFEX = RFST
Notify (SLPB, 0x02) // Device Wake
}
+ /* iGFX RC method call stripped */
}
-#if 0 // TODO: Figure out what this is for
- Method (OSIN, 0, NotSerialized)
+ Method (MBEC, 3, Serialized)
{
- COSI = OSYS
- /* TRPS: Generic SMI trap handler */
- TRPS (0x82, 1)
- }
-#endif
-
-#if 0 // TODO: Implement
- Method (MBEC, 3, Serialized) // Read-Modify-Write
- {
- /* Based on similar methods/tables at
- *
https://github.com/linuxhw/ACPI/blob/master/Notebook/Sony/SVE1713/SVE1713S1RW/506CDC50E671#L9359
- * which use ASL instead of SMM calls */
- Local0 = EC_READ (Arg0)
+ Local0 = RBEC (Arg0)
Local0 &= Arg1
Local0 |= Arg2
- EC_WRITE (Arg0, Local0)
+ WBEC (Arg0, Local0)
}
-#endif
/* Graphical hotkey */
Method (_Q19, 0, NotSerialized)
@@ -316,7 +309,8 @@ Device (\_SB.PCI0.LPCB.EC0)
}
ElseIf ((Local1 > 0x80) && (Local1 < 0xA0))
{
- TPEN ^= 1 /* TODO: Not working. What else does WMI do here? */
+ /* TODO: Not working when called by HID mode. What does WMI do here?
*/
+ TPEN ^= 1
}
}
}
@@ -330,8 +324,7 @@ Device (\_SB.PCI0.LPCB.EC0)
}
Else
{
- /* MBEC: Called SMI function 0x12 */
-// MBEC (0x92, 0xF7, 0x08) // EOSD = 1
+ MBEC (0x92, 0xF7, 0x08) // EOSD = 1
}
Sleep (500)
@@ -341,9 +334,8 @@ Device (\_SB.PCI0.LPCB.EC0)
Method (_Q3F, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x3F - TRPS")
- /* TRPS: Generic SMI trap handler */
-// TRPS (0x80, 0)
+ // Arg3 is unused
+// TRPS (0x80, 0, 0)
}
Method (_Q40, 0, NotSerialized)
@@ -397,46 +389,44 @@ Device (\_SB.PCI0.LPCB.EC0)
Method (_Q60, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x60 -> WMI")
+ \DBGH ("EC Query (0x60): WMI")
}
Method (_Q61, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x61 -> WMI")
+ \DBGH ("EC Query (0x61): WMI")
}
Method (_Q62, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x62 -> Optimus GC6")
+ \DBGH ("EC Query (0x62): Optimus GC6 or NVIDIA GPS")
}
Method (_Q63, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x63 -> Optimus GC6")
+ \DBGH ("EC Query (0x63): Optimus GC6 or NVIDIA GPS")
}
Method (_Q67, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x67 -> NVIDIA GPS")
+ \DBGH ("EC Query (0x67): NVIDIA GPS")
}
Method (_Q68, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x68 -> NVIDIA GPS")
+ \DBGH ("EC Query (0x68): NVIDIA GPS")
}
Method (_Q6C, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x6C - TRPS")
- /* TRPS: Generic SMI trap handler */
-// TRPS (0x81, 0)
+ // Arg3 is unused
+// TRPS (0x81, 0, 0)
}
Method (_Q6D, 0, NotSerialized)
{
- \DBGH ("EC Query: 0x6D - TRPS")
- /* TRPS: Generic SMI trap handler */
-// TRPS (0x81, 1)
+ // Arg3 is unused
+// TRPS (0x81, 1, 0)
}
#include "ac.asl"
diff --git
a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/eclib.asl
b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/eclib.asl
new file mode 100644
index 000000000000..57921eb09c8b
--- /dev/null
+++ b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/eclib.asl
@@ -0,0 +1,141 @@
+/** @file
+ This file contains the EC library for ACPI.
+
+ Copyright (c) 2021, Baruch Binyamin Doron
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <EcCommands.h>
+
+Mutex (EMTX, 0)
+
+OperationRegion (ECO1, SystemIO, EC_D_PORT, 1)
+Field (ECO1, ByteAcc, Lock, Preserve)
+{
+ ECDT, 8
+}
+
+OperationRegion (ECO2, SystemIO, EC_C_PORT, 1)
+Field (ECO2, ByteAcc, Lock, Preserve)
+{
+ ECSC, 8
+}
+
+// Send EC command
+// Return time elapsed on success, EC_TIME_OUT on failure
+Method (SECC, 1, Serialized)
+{
+ // Wait EC timeout for input buffer to be empty
+ Local0 = 0
+ While ((ECSC & EC_S_IBF) && Local0 < EC_TIME_OUT)
+ {
+ Stall (1)
+ Local0++
+ }
+ // Send command if timeout was not reached
+ If (Local0 < EC_TIME_OUT)
+ {
+ ECSC = Arg0
+ }
+
+ // Return status
+ Return (Local0)
+}
+
+// Send EC data
+// Return time elapsed on success, EC_TIME_OUT on failure
+Method (SECD, 1, Serialized)
+{
+ // Wait EC timeout for input buffer to be empty
+ Local0 = 0
+ While ((ECSC & EC_S_IBF) && Local0 < EC_TIME_OUT)
+ {
+ Stall (1)
+ Local0++
+ }
+ // Send data if timeout was not reached
+ If (Local0 < EC_TIME_OUT)
+ {
+ ECDT = Arg0
+ }
+
+ // Return status
+ Return (Local0)
+}
+
+// Receive EC data
+// Return data on success, EC_TIME_OUT on failure
+Method (RECD, 0, Serialized)
+{
+ // Wait EC timeout for input buffer to be empty
+ Local0 = 0
+ While ((ECSC & EC_S_OBF) && Local0 < EC_TIME_OUT)
+ {
+ Stall (1)
+ Local0++
+ }
+ // Return data
+ If (Local0 < EC_TIME_OUT)
+ {
+ Return (ECDT)
+ }
+
+ // Timeout exceeded, return failure
+ Return (Local0)
+}
+
+// Read EC byte
+// Return data on success, EC_TIME_OUT on failure
+Method (RBEC, 1, Serialized)
+{
+ // Check for mutex acquired to not run with another function
+ Local0 = Acquire (EMTX, 0xFFFF)
+ If (Local0 == 0)
+ {
+ Local0 = SECC (EC_C_ACPI_READ)
+ }
+
+ If (Local0 < EC_TIME_OUT)
+ {
+ // Send address
+ Local0 = SECD (Arg0)
+ }
+
+ If (Local0 < EC_TIME_OUT)
+ {
+ // Receive data
+ Local0 = RECD ()
+ }
+
+ Release (EMTX)
+ Return (Local0)
+}
+
+// Write EC byte
+// Return time elapsed on success, EC_TIME_OUT on failure
+Method (WBEC, 2, Serialized)
+{
+ // Check for mutex acquired to not run with another function
+ Local0 = Acquire (EMTX, 0xFFFF)
+ If (Local0 == 0)
+ {
+ Local0 = SECC (EC_C_ACPI_READ)
+ }
+
+ If (Local0 < EC_TIME_OUT)
+ {
+ // Send address
+ Local0 = SECD (Arg0)
+ }
+
+ If (Local0 < EC_TIME_OUT)
+ {
+ // Send data
+ Local0 = SECD (Arg1)
+ }
+
+ Release (EMTX)
+ // Return data
+ Return (Local0)
+}
diff --git
a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/mainboard.asl
b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/mainboard.asl
index 7a73d37429d0..46edce92fb47 100644
--- a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/mainboard.asl
+++ b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/mainboard.asl
@@ -6,25 +6,27 @@
**/
// TODO: Add HID support for touchpad, etc.
+// - Does board actually support DPTF?
#include "thermal.asl"
External (\_SB.SLPB, DeviceObj)
-// TODO: Need hooks from BoardAcpiDxe
-
Scope (_SB)
{
Method (MPTS, 1, NotSerialized) // _PTS: Prepare To Sleep
{
^PCI0.LPCB.EC0.ECPS (Arg0)
+ /* TBT and DTS not supported, TPM.PTS can be called elsewhere */
}
Method (MWAK, 1, Serialized) // _WAK: Wake
{
^PCI0.LPCB.EC0.ECWK (Arg0)
+ /* No GPIO expander, 8254 clock-gating and PCIe PME can be performed
elsewhere */
If ((Arg0 == 3) || (Arg0 == 4))
{
+ /* DTS and TBT not supported, iGFX RC variable update stripped */
Notify (LID0, 0x80) // Status Change
}
}
diff --git
a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/thermal.asl
b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/thermal.asl
index 805ee0700cd0..5d6604b41a9f 100644
--- a/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/thermal.asl
+++ b/Platform/Intel/KabylakeOpenBoardPkg/AspireVn7Dash572G/Acpi/thermal.asl
@@ -15,12 +15,16 @@ Scope (_TZ)
{
#ifdef LGMR_ENABLED
Local0 = \_SB.PCI0.LPCB.EC0.MS0T
-// Local1 = \_SB.PCI0.LPCB.EC0.MCSS
+ Local1 = \_SB.PCI0.LPCB.EC0.MCSS
+ /* Suppress warning over reading status flag by dummy OR */
+ Or (Local1, 1, Local1)
Local2 = \_SB.PCI0.LPCB.EC0.MOSD
#else
Local0 = \_SB.PCI0.LPCB.EC0.ES0T
-// Local1 = \_SB.PCI0.LPCB.EC0.ESSF // "MCSS": Considering neighbouring
bits, likely
- // "ESSF" in thermals, not "ECSS" in
notify
+ /* "MCSS": Considering neighbouring bits, likely
+ * "ESSF" in thermals, not "ECSS" in power notifications */
+ Local1 = \_SB.PCI0.LPCB.EC0.ESSF
+ Or (Local1, 1, Local1)
Local2 = \_SB.PCI0.LPCB.EC0.EOSD
#endif
If (Local2) // Thermal trip
@@ -59,7 +63,7 @@ Scope (_TZ)
Else
{
/* MBEC: Called SMI function 0x12 */
-// \_SB.PCI0.LPCB.EC0.MBEC (0x90, 0xFE, Arg0) // SCPM = Arg0
+ \_SB.PCI0.LPCB.EC0.MBEC (0x90, 0xFE, Arg0) // SCPM = Arg0
}
}
@@ -89,6 +93,7 @@ Scope (_TZ)
#else
Local0 = \_SB.PCI0.LPCB.EC0.ES1T
#endif
+
Return (C2K (Local0))
}
@@ -116,7 +121,6 @@ Scope (_TZ)
Local0 = 30
}
- Local0 = ((Local0 * 10) + 2732) // Celsius to Kelvin
- Return (Local0)
+ Return ((Local0 * 10) + 2732) // Celsius to centi-Kelvin
}
}
--
2.37.2
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