By default, MMC is initialized with 1-bit mode and less than 400KHz bus
clock. It causes MMC working inefficiently.
Add the interface to change the bus width and speed.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Haojian Zhuang <haojian.zhu...@linaro.org>
---
EmbeddedPkg/Include/Protocol/MmcHost.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/EmbeddedPkg/Include/Protocol/MmcHost.h
b/EmbeddedPkg/Include/Protocol/MmcHost.h
index 89f2e80..a242291 100644
--- a/EmbeddedPkg/Include/Protocol/MmcHost.h
+++ b/EmbeddedPkg/Include/Protocol/MmcHost.h
@@ -131,6 +131,12 @@ typedef EFI_STATUS (EFIAPI *MMC_WRITEBLOCKDATA) (
IN UINT32 *Buffer
);
+typedef EFI_STATUS (EFIAPI *MMC_SETIOS) (
+ IN EFI_MMC_HOST_PROTOCOL *This,
+ IN UINT32 BusClockRate,
+ IN UINT32 BusWidth
+ );
+
struct _EFI_MMC_HOST_PROTOCOL {
@@ -147,6 +153,8 @@ struct _EFI_MMC_HOST_PROTOCOL {
MMC_READBLOCKDATA ReadBlockData;
MMC_WRITEBLOCKDATA WriteBlockData;
+ MMC_SETIOS SetIos;
+
};
#define MMC_HOST_PROTOCOL_REVISION 0x00010001 // 1.1
--
2.7.4
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
