efi_loader: implement deprecated Unicode collation protocol

In EFI 1.10 a version of the Unicode collation protocol using ISO 639-2
language codes existed. This protocol is not part of the UEFI specification
any longer. Unfortunately it is required to run the UEFI Self Certification
Test (SCT) II, version 2.6, 2017. So we implement it here for the sole
purpose of running the SCT. It can be removed once a compliant SCT is
available.

The configuration option defaults to no.

Signed-off-by: Rob Clark <robdclark@gmail.com>

Most of Rob's original patch is already merged. Only the deprecated
protocol is missing. Rebase it and make it configurable.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

3 files changed, 44 insertions, 1 deletions

diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 7e13ee54b2..fc04ea39d0 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -54,6 +54,17 @@ config EFI_UNICODE_CAPITALIZATION
 	  set, only the the correct handling of the letters of the codepage
 	  used by the FAT file system is ensured.
 
+config EFI_UNICODE_COLLATION_PROTOCOL
+	bool "Deprecated version of the Unicode collation protocol"
+	default n
+	help
+	  In EFI 1.10 a version of the Unicode collation protocol using ISO
+	  639-2 language codes existed. This protocol is not part of the UEFI
+	  specification any longer. Unfortunately it is required to run the
+	  UEFI Self Certification Test (SCT) II, version 2.6, 2017.
+
+	  Choose this option for testing only. It is bound to be removed.
+
 endif
 
 config EFI_LOADER_BOUNCE_BUFFER
diff --git a/lib/efi_loader/efi_root_node.c b/lib/efi_loader/efi_root_node.c
index 2b7277de05..f68b0fdc61 100644
--- a/lib/efi_loader/efi_root_node.c
+++ b/lib/efi_loader/efi_root_node.c
@@ -61,7 +61,12 @@ efi_status_t efi_root_node_register(void)
 			 &efi_guid_device_path_utilities_protocol,
 			 (void *)&efi_device_path_utilities,
 #if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL2)
-			 /* Unicode collation protocol */
+#if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL)
+			 /* Deprecated Unicode collation protocol */
+			 &efi_guid_unicode_collation_protocol,
+			 (void *)&efi_unicode_collation_protocol,
+#endif
+			 /* Current Unicode collation protocol */
 			 &efi_guid_unicode_collation_protocol2,
 			 (void *)&efi_unicode_collation_protocol2,
 #endif
diff --git a/lib/efi_loader/efi_unicode_collation.c b/lib/efi_loader/efi_unicode_collation.c
index e04a4de5b7..06fddca1c4 100644
--- a/lib/efi_loader/efi_unicode_collation.c
+++ b/lib/efi_loader/efi_unicode_collation.c
@@ -327,3 +327,30 @@ const struct efi_unicode_collation_protocol efi_unicode_collation_protocol2 = {
 	.str_to_fat = efi_str_to_fat,
 	.supported_languages = "en",
 };
+
+/*
+ * In EFI 1.10 a version of the Unicode collation protocol using ISO 639-2
+ * language codes existed. This protocol is not part of the UEFI specification
+ * any longer. Unfortunately it is required to run the UEFI Self Certification
+ * Test (SCT) II, version 2.6, 2017. So we implement it here for the sole
+ * purpose of running the SCT. It can be removed when a compliant SCT is
+ * available.
+ */
+#if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL)
+
+/* GUID of the EFI_UNICODE_COLLATION_PROTOCOL */
+const efi_guid_t efi_guid_unicode_collation_protocol =
+	EFI_UNICODE_COLLATION_PROTOCOL_GUID;
+
+const struct efi_unicode_collation_protocol efi_unicode_collation_protocol = {
+	.stri_coll = efi_stri_coll,
+	.metai_match = efi_metai_match,
+	.str_lwr = efi_str_lwr,
+	.str_upr = efi_str_upr,
+	.fat_to_str = efi_fat_to_str,
+	.str_to_fat = efi_str_to_fat,
+	/* ISO 639-2 language code */
+	.supported_languages = "eng",
+};
+
+#endif