Jun, Haojian - any comments?
On Wed, Jan 16, 2019 at 06:51:36PM +0530, Meenakshi Aggarwal wrote:
> Issue : SD read failure for high capacity cards e.g. 64 GB
> i
> Reason : Command argument value exceeds 32 bit for block number 0x3787FFF
> and cant be fit into 32 bit wide SD host controller register.
>
> Fix :
> AccessMode bits [29:30] of OCR is a valid definition to calculate
> data address for eMMC cards.
>
> For SD cards, data address is calculated on the basis of
> card capacity status bit[30] of OCR.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Meenakshi Aggarwal <meenakshi.aggar...@nxp.com>
> ---
> EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c | 19 ++++++++++++++-----
> 1 file changed, 14 insertions(+), 5 deletions(-)
>
> diff --git a/EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c
> b/EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c
> index a2b9232..625a59e 100644
> --- a/EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c
> +++ b/EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c
> @@ -148,12 +148,21 @@ MmcTransferBlock (
> MmcHostInstance = MMC_HOST_INSTANCE_FROM_BLOCK_IO_THIS (This);
> MmcHost = MmcHostInstance->MmcHost;
>
> - //Set command argument based on the card access mode (Byte mode or Block
> mode)
> - if ((MmcHostInstance->CardInfo.OCRData.AccessMode & MMC_OCR_ACCESS_MASK) ==
> - MMC_OCR_ACCESS_SECTOR) {
> - CmdArg = Lba;
> + if (MmcHostInstance->CardInfo.CardType != EMMC_CARD) {
> + //Set command argument based on the card capacity (SDSC or SDXC/SDHC)
> + if (MmcHostInstance->CardInfo.OCRData.AccessMode & BIT1) {
> + CmdArg = Lba;
> + } else {
> + CmdArg = Lba * This->Media->BlockSize;
> + }
> } else {
> - CmdArg = Lba * This->Media->BlockSize;
> + //Set command argument based on the card access mode (Byte mode or Block
> mode)
> + if ((MmcHostInstance->CardInfo.OCRData.AccessMode & MMC_OCR_ACCESS_MASK)
> ==
> + MMC_OCR_ACCESS_SECTOR) {
> + CmdArg = Lba;
> + } else {
> + CmdArg = Lba * This->Media->BlockSize;
> + }
> }
>
> Status = MmcHost->SendCommand (MmcHost, Cmd, CmdArg);
> --
> 1.9.1
>
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
