Silicon/Openmoko: add driver for ChaosKey RNG USB device

This is a continuation of the work carried out by Leif Lindholm to
implement a driver for the ChaosKey USB device. This driver uses the
UEFI driver model, which is a slightly awkward fit, due to the fact
that a UEFI implementation may legally only instantiate those protocols
that are needed to access the device path that the active Boot####
options refers to.

However, it is expected that UEFI implementations typically instantiate
all USB I/O protocols and connect them as well, as those are required
for a USB keyboard to be able to control the boot sequence. This should
result in this driver being connected and given the opportunity to
produce the EFI_RNG_PROTOCOL.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

1 files changed, 186 insertions, 0 deletions

diff --git a/Silicon/Openmoko/ChaosKeyDxe/ComponentName.c b/Silicon/Openmoko/ChaosKeyDxe/ComponentName.c
new file mode 100644
index 0000000000..5c7e1825e8
--- /dev/null
+++ b/Silicon/Openmoko/ChaosKeyDxe/ComponentName.c
@@ -0,0 +1,186 @@
+/** @file

+  UEFI Component Name(2) protocol implementation for ChaosKey driver.

+

+  Copyright (c) 2017, Linaro Ltd. 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.

+

+**/

+

+#include "ChaosKeyDriver.h"

+

+STATIC EFI_UNICODE_STRING_TABLE mChaosKeyDriverNameTable[] = {

+  {

+    "en",

+    (CHAR16 *)L"ChaosKey RNG USB driver"

+  },

+  { }

+};

+

+STATIC EFI_UNICODE_STRING_TABLE mChaosKeyControllerNameTable[] = {

+  {

+    "en",

+    (CHAR16 *)L"ChaosKey Random Number Generator (USB)"

+  },

+  { }

+};

+

+/**

+  Retrieves a Unicode string that is the user readable name of the driver.

+

+  This function retrieves the user readable name of a driver in the form of a

+  Unicode string. If the driver specified by This has a user readable name in

+  the language specified by Language, then a pointer to the driver name is

+  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified

+  by This does not support the language specified by Language,

+  then EFI_UNSUPPORTED is returned.

+

+  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or

+                                EFI_COMPONENT_NAME_PROTOCOL instance.

+

+  @param  Language[in]          A pointer to a Null-terminated ASCII string

+                                array indicating the language. This is the

+                                language of the driver name that the caller is

+                                requesting, and it must match one of the

+                                languages specified in SupportedLanguages. The

+                                number of languages supported by a driver is up

+                                to the driver writer. Language is specified

+                                in RFC 4646 or ISO 639-2 language code format.

+

+  @param  DriverName[out]       A pointer to the Unicode string to return.

+                                This Unicode string is the name of the

+                                driver specified by This in the language

+                                specified by Language.

+

+  @retval EFI_SUCCESS           The Unicode string for the Driver specified by

+                                This and the language specified by Language was

+                                returned in DriverName.

+

+  @retval EFI_INVALID_PARAMETER Language is NULL.

+

+  @retval EFI_INVALID_PARAMETER DriverName is NULL.

+

+  @retval EFI_UNSUPPORTED       The driver specified by This does not support

+                                the language specified by Language.

+

+**/

+STATIC

+EFI_STATUS

+EFIAPI

+ChaosKeyGetDriverName (

+  IN  EFI_COMPONENT_NAME2_PROTOCOL  *This,

+  IN  CHAR8                         *Language,

+  OUT CHAR16                        **DriverName

+  )

+{

+  return LookupUnicodeString2 (Language,

+                               This->SupportedLanguages,

+                               mChaosKeyDriverNameTable,

+                               DriverName,

+                               FALSE);

+}

+

+/**

+  Retrieves a Unicode string that is the user readable name of the controller

+  that is being managed by a driver.

+

+  This function retrieves the user readable name of the controller specified by

+  ControllerHandle and ChildHandle in the form of a Unicode string. If the

+  driver specified by This has a user readable name in the language specified by

+  Language, then a pointer to the controller name is returned in ControllerName,

+  and EFI_SUCCESS is returned.  If the driver specified by This is not currently

+  managing the controller specified by ControllerHandle and ChildHandle,

+  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not

+  support the language specified by Language, then EFI_UNSUPPORTED is returned.

+

+  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or

+                                EFI_COMPONENT_NAME_PROTOCOL instance.

+

+  @param  ControllerHandle[in]  The handle of a controller that the driver

+                                specified by This is managing.  This handle

+                                specifies the controller whose name is to be

+                                returned.

+

+  @param  ChildHandle[in]       The handle of the child controller to retrieve

+                                the name of.  This is an optional parameter that

+                                may be NULL.  It will be NULL for device

+                                drivers.  It will also be NULL for a bus drivers

+                                that wish to retrieve the name of the bus

+                                controller.  It will not be NULL for a bus

+                                driver that wishes to retrieve the name of a

+                                child controller.

+

+  @param  Language[in]          A pointer to a Null-terminated ASCII string

+                                array indicating the language.  This is the

+                                language of the driver name that the caller is

+                                requesting, and it must match one of the

+                                languages specified in SupportedLanguages. The

+                                number of languages supported by a driver is up

+                                to the driver writer. Language is specified in

+                                RFC 4646 or ISO 639-2 language code format.

+

+  @param  ControllerName[out]   A pointer to the Unicode string to return.

+                                This Unicode string is the name of the

+                                controller specified by ControllerHandle and

+                                ChildHandle in the language specified by

+                                Language from the point of view of the driver

+                                specified by This.

+

+  @retval EFI_SUCCESS           The Unicode string for the user readable name in

+                                the language specified by Language for the

+                                driver specified by This was returned in

+                                DriverName.

+

+  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.

+

+  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid

+                                EFI_HANDLE.

+

+  @retval EFI_INVALID_PARAMETER Language is NULL.

+

+  @retval EFI_INVALID_PARAMETER ControllerName is NULL.

+

+  @retval EFI_UNSUPPORTED       The driver specified by This is not currently

+                                managing the controller specified by

+                                ControllerHandle and ChildHandle.

+

+  @retval EFI_UNSUPPORTED       The driver specified by This does not support

+                                the language specified by Language.

+

+**/

+STATIC

+EFI_STATUS

+EFIAPI

+ChaosKeyGetControllerName (

+  IN  EFI_COMPONENT_NAME2_PROTOCOL                    *This,

+  IN  EFI_HANDLE                                      ControllerHandle,

+  IN  EFI_HANDLE                                      ChildHandle        OPTIONAL,

+  IN  CHAR8                                           *Language,

+  OUT CHAR16                                          **ControllerName

+  )

+{

+  if (ChildHandle != NULL) {

+    return EFI_UNSUPPORTED;

+  }

+

+  return LookupUnicodeString2 (Language,

+                               This->SupportedLanguages,

+                               mChaosKeyControllerNameTable,

+                               ControllerName,

+                               FALSE);

+}

+

+//

+// EFI Component Name 2 Protocol

+//

+EFI_COMPONENT_NAME2_PROTOCOL gChaosKeyDriverComponentName2 = {

+  ChaosKeyGetDriverName,

+  ChaosKeyGetControllerName,

+  "en"

+};