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EmbeddedPkg/Drivers: add virtual keyboard driver

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This driver is used to simulate a keyboard. For example, user
could read GPIO setting or data from RAM address. If the value
matches the expected pattern, it could trigger a key pressed
event.

User needs to implement hooks of PLATFORM_VIRTUAL_KBD_PROTOCOL.
There're 4 hooks in this protocol.
Register(): Quote the interface that user needs. For example, user
needs to locate GPIO protocol if he wants to simulate a GPIO value
as a key.
Reset(): Do the initialization before reading value.
Query(): Read value. If the value matches the expected pattern,
trigger a key pressed event.
Clear(): Clean the value if necessary.

Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Haojian Zhuang
2018-03-08 21:28:22 +08:00
committed by Leif Lindholm
parent 8fe18cba76
commit 1df5fb2d83
7 changed files with 2161 additions and 0 deletions
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65
EmbeddedPkg/Include/Protocol/PlatformVirtualKeyboard.h Normal file
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/** @file
Copyright (c) 2018, Linaro. All rights reserved.
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 __PLATFORM_VIRTUAL_KEYBOARD_H__
#define __PLATFORM_VIRTUAL_KEYBOARD_H__
//
// Protocol interface structure
//
typedef struct _PLATFORM_VIRTUAL_KBD_PROTOCOL PLATFORM_VIRTUAL_KBD_PROTOCOL;
typedef struct _VIRTUAL_KBD_KEY VIRTUAL_KBD_KEY;
#define VIRTUAL_KEYBOARD_KEY_SIGNATURE SIGNATURE_32 ('v', 'k', 'b', 'd')
struct _VIRTUAL_KBD_KEY {
UINTN Signature;
EFI_INPUT_KEY Key;
};
typedef
EFI_STATUS
(EFIAPI *PLATFORM_VIRTUAL_KBD_REGISTER) (
IN VOID
);
typedef
EFI_STATUS
(EFIAPI *PLATFORM_VIRTUAL_KBD_RESET) (
IN VOID
);
typedef
BOOLEAN
(EFIAPI *PLATFORM_VIRTUAL_KBD_QUERY) (
IN VIRTUAL_KBD_KEY *VirtualKey
);
typedef
EFI_STATUS
(EFIAPI *PLATFORM_VIRTUAL_KBD_CLEAR) (
IN VIRTUAL_KBD_KEY *VirtualKey
);
struct _PLATFORM_VIRTUAL_KBD_PROTOCOL {
PLATFORM_VIRTUAL_KBD_REGISTER Register;
PLATFORM_VIRTUAL_KBD_RESET Reset;
PLATFORM_VIRTUAL_KBD_QUERY Query;
PLATFORM_VIRTUAL_KBD_CLEAR Clear;
};
extern EFI_GUID gPlatformVirtualKeyboardProtocolGuid;
#endif /* __PLATFORM_VIRTUAL_KEYBOARD_H__ */