Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5045
-gerrit
commit 177a4464e98a3e3db52eac457b4265dca3756c0a Author: Duncan Laurie dlaurie@chromium.org Date: Mon Jan 13 10:15:12 2014 -0800
rambi: Add ACPI table support for I2C devices
In order to support probing I2C devices when the controller is in ACPI mode the mainboard needs to decalre them in the proper scope with the address/interrupt information. The touchpad devices are ATML0000/ELAN0000 and the touchscreen is ATML0001 so they can be distinguished in userland scripts based on ID. There is also a special "ISTP" node that indicates whether the devices is a touchpad (=1) or touchscreen (=0) in case this is useful to drivers.
These names may not be final but they are a starting point and can be easily changed.
Atmel devices also have a bootloader mode which needs to be declared as a separate device. Unfortunately it does not work as expected to have multiple I2cSerialBus() resources declared in a single device and have it select properly, even with the use of StartDependentFn(), so bootloader devices are declared separately.
The original devices are left in _SB scope and are only enabled if the I2C controllers are in PCI mode. The new devices are only enabled if the I2C controllers are in ACPI mode.
BUG=chrome-os-partner:24380 BRANCH=baytrail TEST=manual
1) Ensure there is no change in functionality by default and that the devices are still probed by chromeos_laptop in the kernel. 2) Enable lpss_acpi_mode=1 in devicetree.cb and kernel changes to add _HID entries for devices in appropriate drivers. Ensure that the devices are probed successfully. Further changes are needed to the chromeos-touch-firmware scripts to load config and update firmware based on the new ACPI _HID entries. 3) Put touchpad in bootloader mode (by flashing bad firmware) and ensure that it is detected at address 0x25 and the firmware is able to be updated.
Change-Id: I5b9b47ddc94474a677497271e963f62cb09438e0 Signed-off-by: Duncan Laurie dlaurie@chromium.org Reviewed-on: https://chromium-review.googlesource.com/182259 Reviewed-by: Aaron Durbin adurbin@chromium.org Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/mainboard/google/rambi/acpi/mainboard.asl | 226 +++++++++++++++++++++++--- src/mainboard/google/rambi/dsdt.asl | 5 +- 2 files changed, 202 insertions(+), 29 deletions(-)
diff --git a/src/mainboard/google/rambi/acpi/mainboard.asl b/src/mainboard/google/rambi/acpi/mainboard.asl index 696d1aa..9b16272 100644 --- a/src/mainboard/google/rambi/acpi/mainboard.asl +++ b/src/mainboard/google/rambi/acpi/mainboard.asl @@ -40,71 +40,243 @@ Scope (_SB)
Device (TPAD) { - Name (_ADR, 0x0) + Name (_HID, EisaId ("PNP0C0E")) Name (_UID, 1)
- // Report as a Sleep Button device so Linux will - // automatically enable it as a wake source - Name (_HID, EisaId("PNP0C0E")) - Name (_CRS, ResourceTemplate() { Interrupt (ResourceConsumer, Edge, ActiveLow) { BOARD_TRACKPAD_IRQ } + }) + + Method (_STA) + { + /* Disable if I2C1 is in ACPI mode */ + If (LEqual (\S1EN, 1)) { + Return (0x0) + } Else { + Return (0xF) + } + }
- VendorShort (ADDR) + Name (_PRW, Package() { BOARD_TRACKPAD_WAKE_GPIO, 0x3 }) + } + + Device (TSCR) + { + Name (_HID, EisaId ("PNP0C0E")) + Name (_UID, 2) + + Name (_CRS, ResourceTemplate() + { + Interrupt (ResourceConsumer, Edge, ActiveLow) { - BOARD_TRACKPAD_I2C_ADDR + BOARD_TOUCHSCREEN_IRQ } })
- Name (_PRW, Package() { BOARD_TRACKPAD_WAKE_GPIO, 0x3 }) + Method (_STA) + { + /* Disable if I2C6 is in ACPI mode */ + If (LEqual (\S6EN, 1)) { + Return (0x0) + } Else { + Return (0xF) + } + } + + Name (_PRW, Package() { BOARD_TOUCHSCREEN_WAKE_GPIO, 0x3 }) + } +} + +Scope (_SB.I2C1) +{ + Device (ATPB) + { + Name (_HID, "ATML0000") + Name (_DDN, "Atmel Touchpad Bootloader") + Name (_UID, 1) + Name (ISTP, 1) /* Touchpad */
- Method (_DSW, 3, NotSerialized) + Name (_CRS, ResourceTemplate() { - Store (BOARD_TRACKPAD_WAKE_GPIO, Local0) + I2cSerialBus ( + 0x25, // SlaveAddress + ControllerInitiated, // SlaveMode + 400000, // ConnectionSpeed + AddressingMode7Bit, // AddressingMode + "_SB.I2C1", // ResourceSource + ) + Interrupt (ResourceConsumer, Edge, ActiveLow) + { + BOARD_TRACKPAD_IRQ + } + })
- If (LEqual (Arg0, 1)) { - // Enable GPIO as wake source - // _SB.PCI0.LPCB.GWAK (Local0) + Method (_STA) + { + If (LEqual (\S1EN, 1)) { + Return (0xF) + } Else { + Return (0x0) } } + + /* Allow device to power off in S0 */ + Name (_S0W, 4) }
- Device (TSCR) + Device (ATPA) { - Name (_ADR, 0x0) + Name (_HID, "ATML0000") + Name (_CID, EisaId ("PNP0C0E")) + Name (_DDN, "Atmel Touchpad") Name (_UID, 2) + Name (ISTP, 1) /* Touchpad */ + + Name (_CRS, ResourceTemplate() + { + I2cSerialBus ( + 0x4b, // SlaveAddress + ControllerInitiated, // SlaveMode + 400000, // ConnectionSpeed + AddressingMode7Bit, // AddressingMode + "_SB.I2C1", // ResourceSource + ) + Interrupt (ResourceConsumer, Edge, ActiveLow) + { + BOARD_TRACKPAD_IRQ + } + })
- // Report as a Sleep Button device so Linux will - // automatically enable it as a wake source - Name (_HID, EisaId("PNP0C0E")) + Method (_STA) + { + If (LEqual (\S1EN, 1)) { + Return (0xF) + } Else { + Return (0x0) + } + } + + /* Allow device to power off in S0 */ + Name (_S0W, 4) + + Name (_PRW, Package() { BOARD_TRACKPAD_WAKE_GPIO, 0x3 }) + } + + Device (ETPA) + { + Name (_HID, "ELAN0000") + Name (_CID, EisaId ("PNP0C0E")) + Name (_DDN, "Elan Touchpad") + Name (_UID, 3) + Name (ISTP, 1) /* Touchpad */
Name (_CRS, ResourceTemplate() { + I2cSerialBus ( + 0x15, // SlaveAddress + ControllerInitiated, // SlaveMode + 400000, // ConnectionSpeed + AddressingMode7Bit, // AddressingMode + "_SB.I2C1", // ResourceSource + ) Interrupt (ResourceConsumer, Edge, ActiveLow) { - BOARD_TOUCHSCREEN_IRQ + BOARD_TRACKPAD_IRQ } + }) + + Method (_STA) + { + If (LEqual (\S1EN, 1)) { + Return (0xF) + } Else { + Return (0x0) + } + } + + /* Allow device to power off in S0 */ + Name (_S0W, 4) + + Name (_PRW, Package() { BOARD_TRACKPAD_WAKE_GPIO, 0x3 }) + } +} + +Scope (_SB.I2C6) +{ + Device (ATSB) + { + Name (_HID, "ATML0001") + Name (_DDN, "Atmel Touchscreen Bootloader") + Name (_UID, 4) + Name (ISTP, 0) /* TouchScreen */
- VendorShort (ADDR) + Name (_CRS, ResourceTemplate() + { + I2cSerialBus ( + 0x26, // SlaveAddress + ControllerInitiated, // SlaveMode + 400000, // ConnectionSpeed + AddressingMode7Bit, // AddressingMode + "_SB.I2C6", // ResourceSource + ) + Interrupt (ResourceConsumer, Edge, ActiveLow) { - BOARD_TOUCHSCREEN_I2C_ADDR + BOARD_TOUCHSCREEN_IRQ } })
- Name (_PRW, Package() { BOARD_TOUCHSCREEN_WAKE_GPIO, 0x3 }) + Method (_STA) + { + If (LEqual (\S6EN, 1)) { + Return (0xF) + } Else { + Return (0x0) + } + }
- Method (_DSW, 3, NotSerialized) + /* Allow device to power off in S0 */ + Name (_S0W, 4) + } + + Device (ATSA) + { + Name (_HID, "ATML0001") + Name (_CID, EisaId ("PNP0C0E")) + Name (_DDN, "Atmel Touchscreen") + Name (_UID, 5) + Name (ISTP, 0) /* TouchScreen */ + + Name (_CRS, ResourceTemplate() { - Store (BOARD_TOUCHSCREEN_WAKE_GPIO, Local0) + I2cSerialBus ( + 0x4a, // SlaveAddress + ControllerInitiated, // SlaveMode + 400000, // ConnectionSpeed + AddressingMode7Bit, // AddressingMode + "_SB.I2C6", // ResourceSource + ) + Interrupt (ResourceConsumer, Edge, ActiveLow) + { + BOARD_TOUCHSCREEN_IRQ + } + })
- If (LEqual (Arg0, 1)) { - // Enable GPIO as wake source - // _SB.PCI0.LPCB.GWAK (Local0) + Method (_STA) + { + If (LEqual (\S6EN, 1)) { + Return (0xF) + } Else { + Return (0x0) } } + + /* Allow device to power off in S0 */ + Name (_S0W, 4) + + Name (_PRW, Package() { BOARD_TOUCHSCREEN_WAKE_GPIO, 0x3 }) } } diff --git a/src/mainboard/google/rambi/dsdt.asl b/src/mainboard/google/rambi/dsdt.asl index 53f2922..4165087 100644 --- a/src/mainboard/google/rambi/dsdt.asl +++ b/src/mainboard/google/rambi/dsdt.asl @@ -23,7 +23,7 @@ DefinitionBlock( "dsdt.aml", "DSDT", - 0x02, // DSDT revision: ACPI v2.0 + 0x05, // DSDT revision: ACPI v5.0 "COREv4", // OEM id "COREBOOT", // OEM table id 0x20110725 // OEM revision @@ -31,7 +31,6 @@ DefinitionBlock( { // Some generic macros #include <soc/intel/baytrail/acpi/platform.asl> - #include "acpi/mainboard.asl"
// global NVS and variables #include <soc/intel/baytrail/acpi/globalnvs.asl> @@ -56,4 +55,6 @@ DefinitionBlock(
/* Chipset specific sleep states */ #include <soc/intel/baytrail/acpi/sleepstates.asl> + + #include "acpi/mainboard.asl" }