From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

The existing HardwareInterrupt protocol lacks the means to configure
the level/edge and polarity properties of an interrupt. So introduce a
new protocol HardwareInterrupt2, and add some new members that allow the
manipulation of those properties.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Girish Pathak <girish.pathak@arm.com>
Signed-off-by: Evan Lloyd <evan.lloyd@arm.com>
Tested-by: Girish Pathak <girish.pathak@arm.com>
---

Notes:
    v2:
    - 2017 [Leif]
    - fixed indentation  by matching CCS Style [Leif]

 EmbeddedPkg/EmbeddedPkg.dec                       |   1 +
 EmbeddedPkg/Include/Protocol/HardwareInterrupt2.h | 182 ++++++++++++++++++++
 2 files changed, 183 insertions(+)

diff --git a/EmbeddedPkg/EmbeddedPkg.dec b/EmbeddedPkg/EmbeddedPkg.dec
index 2c2cf41103c282103c2a83ad9a105d0f6ac2e9a3..2464f715e68c8e0eb1214c0170fb040830b88f06 100644
--- a/EmbeddedPkg/EmbeddedPkg.dec
+++ b/EmbeddedPkg/EmbeddedPkg.dec
@@ -58,6 +58,7 @@ [Guids.common]
 
 [Protocols.common]
   gHardwareInterruptProtocolGuid =  { 0x2890B3EA, 0x053D, 0x1643, { 0xAD, 0x0C, 0xD6, 0x48, 0x08, 0xDA, 0x3F, 0xF1 } }
+  gHardwareInterrupt2ProtocolGuid = { 0x32898322, 0x2da1, 0x474a, { 0xba, 0xaa, 0xf3, 0xf7, 0xcf, 0x56, 0x94, 0x70 } }
   gEfiDebugSupportPeriodicCallbackProtocolGuid = { 0x9546e07c, 0x2cbb, 0x4c88, { 0x98, 0x6c, 0xcd, 0x34, 0x10, 0x86, 0xf0, 0x44 } }
   gEfiEblAddCommandProtocolGuid =   { 0xaeda2428, 0x9a22, 0x4637, { 0x9b, 0x21, 0x54, 0x5e, 0x28, 0xfb, 0xb8, 0x29 } }
   gEmbeddedDeviceGuid =   { 0xbf4b9d10, 0x13ec, 0x43dd, { 0x88, 0x80, 0xe9, 0xb, 0x71, 0x8f, 0x27, 0xde } }
diff --git a/EmbeddedPkg/Include/Protocol/HardwareInterrupt2.h b/EmbeddedPkg/Include/Protocol/HardwareInterrupt2.h
new file mode 100644
index 0000000000000000000000000000000000000000..505052bd81afe7432e3122a2722ceab348777c29
--- /dev/null
+++ b/EmbeddedPkg/Include/Protocol/HardwareInterrupt2.h
@@ -0,0 +1,182 @@
+/** @file
+
+  Copyright (c) 2016-2017, Linaro Ltd. All rights reserved.<BR>
+
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __HARDWARE_INTERRUPT2_H__
+#define __HARDWARE_INTERRUPT2_H__
+
+#include <Protocol/HardwareInterrupt.h>
+
+// 22838932-1a2d-4a47-aaba-f3f7cf569470
+
+#define EFI_HARDWARE_INTERRUPT2_PROTOCOL_GUID \
+  { 0x32898322, 0x2d1a, 0x474a, \
+    { 0xba, 0xaa, 0xf3, 0xf7, 0xcf, 0x56, 0x94, 0x70 } }
+
+typedef enum {
+  EFI_HARDWARE_INTERRUPT2_TRIGGER_LEVEL_LOW,
+  EFI_HARDWARE_INTERRUPT2_TRIGGER_LEVEL_HIGH,
+  EFI_HARDWARE_INTERRUPT2_TRIGGER_EDGE_FALLING,
+  EFI_HARDWARE_INTERRUPT2_TRIGGER_EDGE_RISING,
+} EFI_HARDWARE_INTERRUPT2_TRIGGER_TYPE;
+
+typedef struct _EFI_HARDWARE_INTERRUPT2_PROTOCOL \
+                 EFI_HARDWARE_INTERRUPT2_PROTOCOL;
+
+/**
+  Register Handler for the specified interrupt source.
+
+  @param This     Instance pointer for this protocol
+  @param Source   Hardware source of the interrupt
+  @param Handler  Callback for interrupt. NULL to unregister
+
+  @retval EFI_SUCCESS Source was updated to support Handler.
+  @retval EFI_DEVICE_ERROR  Hardware could not be programmed.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *HARDWARE_INTERRUPT2_REGISTER) (
+  IN EFI_HARDWARE_INTERRUPT2_PROTOCOL *This,
+  IN HARDWARE_INTERRUPT_SOURCE Source,
+  IN HARDWARE_INTERRUPT_HANDLER Handler
+  );
+
+
+/**
+  Enable interrupt source Source.
+
+  @param This     Instance pointer for this protocol
+  @param Source   Hardware source of the interrupt
+
+  @retval EFI_SUCCESS       Source interrupt enabled.
+  @retval EFI_DEVICE_ERROR  Hardware could not be programmed.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *HARDWARE_INTERRUPT2_ENABLE) (
+  IN EFI_HARDWARE_INTERRUPT2_PROTOCOL *This,
+  IN HARDWARE_INTERRUPT_SOURCE Source
+  );
+
+
+/**
+  Disable interrupt source Source.
+
+  @param This     Instance pointer for this protocol
+  @param Source   Hardware source of the interrupt
+
+  @retval EFI_SUCCESS       Source interrupt disabled.
+  @retval EFI_DEVICE_ERROR  Hardware could not be programmed.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *HARDWARE_INTERRUPT2_DISABLE) (
+  IN EFI_HARDWARE_INTERRUPT2_PROTOCOL *This,
+  IN HARDWARE_INTERRUPT_SOURCE Source
+  );
+
+
+/**
+  Return current state of interrupt source Source.
+
+  @param This     Instance pointer for this protocol
+  @param Source   Hardware source of the interrupt
+  @param InterruptState  TRUE: source enabled, FALSE: source disabled.
+
+  @retval EFI_SUCCESS       InterruptState is valid
+  @retval EFI_DEVICE_ERROR  InterruptState is not valid
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *HARDWARE_INTERRUPT2_INTERRUPT_STATE) (
+  IN EFI_HARDWARE_INTERRUPT2_PROTOCOL *This,
+  IN HARDWARE_INTERRUPT_SOURCE Source,
+  IN BOOLEAN *InterruptState
+  );
+
+/**
+  Signal to the hardware that the End Of Intrrupt state
+  has been reached.
+
+  @param This     Instance pointer for this protocol
+  @param Source   Hardware source of the interrupt
+
+  @retval EFI_SUCCESS       Source interrupt EOI'ed.
+  @retval EFI_DEVICE_ERROR  Hardware could not be programmed.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *HARDWARE_INTERRUPT2_END_OF_INTERRUPT) (
+  IN EFI_HARDWARE_INTERRUPT2_PROTOCOL *This,
+  IN HARDWARE_INTERRUPT_SOURCE Source
+  );
+
+/**
+  Return the configured trigger type for an interrupt source
+
+  @param This         Instance pointer for this protocol
+  @param Source       Hardware source of the interrupt
+  @param TriggerType  The configured trigger type
+
+  @retval EFI_SUCCESS       Operation successful
+  @retval EFI_DEVICE_ERROR  Information could not be returned
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *HARDWARE_INTERRUPT2_GET_TRIGGER_TYPE) (
+  IN  EFI_HARDWARE_INTERRUPT2_PROTOCOL *This,
+  IN  HARDWARE_INTERRUPT_SOURCE Source,
+  OUT EFI_HARDWARE_INTERRUPT2_TRIGGER_TYPE *TriggerType
+  );
+
+
+/**
+ Configure the trigger type for an interrupt source
+
+  @param This         Instance pointer for this protocol
+  @param Source       Hardware source of the interrupt
+  @param TriggerType  The trigger type to configure
+
+  @retval EFI_SUCCESS       Operation successful
+  @retval EFI_DEVICE_ERROR  Hardware could not be programmed.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *HARDWARE_INTERRUPT2_SET_TRIGGER_TYPE) (
+  IN  EFI_HARDWARE_INTERRUPT2_PROTOCOL *This,
+  IN  HARDWARE_INTERRUPT_SOURCE Source,
+  IN  EFI_HARDWARE_INTERRUPT2_TRIGGER_TYPE TriggerType
+  );
+
+struct _EFI_HARDWARE_INTERRUPT2_PROTOCOL {
+  HARDWARE_INTERRUPT2_REGISTER            RegisterInterruptSource;
+  HARDWARE_INTERRUPT2_ENABLE              EnableInterruptSource;
+  HARDWARE_INTERRUPT2_DISABLE             DisableInterruptSource;
+  HARDWARE_INTERRUPT2_INTERRUPT_STATE     GetInterruptSourceState;
+  HARDWARE_INTERRUPT2_END_OF_INTERRUPT    EndOfInterrupt;
+
+  // v2 members
+  HARDWARE_INTERRUPT2_GET_TRIGGER_TYPE    GetTriggerType;
+  HARDWARE_INTERRUPT2_SET_TRIGGER_TYPE    SetTriggerType;
+};
+
+extern EFI_GUID gHardwareInterrupt2ProtocolGuid;
+
+#endif
-- 
Guid("CE165669-3EF3-493F-B85D-6190EE5B9759")

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