diff options
Diffstat (limited to 'PandaBoardPkg/patches/0001-fixes-sd-card-identification-on-panda.patch')
| -rw-r--r-- | PandaBoardPkg/patches/0001-fixes-sd-card-identification-on-panda.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/PandaBoardPkg/patches/0001-fixes-sd-card-identification-on-panda.patch b/PandaBoardPkg/patches/0001-fixes-sd-card-identification-on-panda.patch new file mode 100644 index 000000000..a48c0e0f9 --- /dev/null +++ b/PandaBoardPkg/patches/0001-fixes-sd-card-identification-on-panda.patch @@ -0,0 +1,31 @@ +From 8d5bd220aee4a0b6e4c1dc9b3b54fe1b30c30e32 Mon Sep 17 00:00:00 2001 +From: Olivier Deprez <o-deprez@ti.com> +Date: Mon, 25 Jun 2012 11:06:31 +0200 +Subject: [PATCH] fixes sd card identification on panda + +It is observed with few SD cards that the protocol is hanging after issuing cmd5 and before cmd8. +Adding a small delay inbetween recovers and driver bring up is continuing without problem. +--- +EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c | 6 ++++++ + 1 files changed, 6 insertions(+), 0 deletions(-) + +diff --git a/EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c b/EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c +index 47f4aeb..f8d2cc4 100644 +--- a/EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c ++++ b/EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c +@@ -229,6 +229,12 @@ MmcIdentificationMode ( + + // Are we using SDIO ? + Status = MmcHost->SendCommand (MmcHost, MMC_CMD5, 0); ++ ++#if 1 // Added for Panda Board ++ /* It seems few SD cards need some time to recover from this command? */ ++ MicroSecondDelay(1000); ++#endif ++ + if (Status == EFI_SUCCESS) { + DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD5): Error - SDIO not supported.\n")); + return EFI_UNSUPPORTED; +-- +1.7.4.1 + |