On Tue, May 21, 2013 at 03:01:36PM +0530, Jagannadha Sutradharudu Teki wrote:
CAP register don't have any information for 8-bit buswidth support on 2.0 sdhci spec, only from 3.0 onwards bit[18] got this information.
Due to this misassignment in sdhci, mmc is setting 8-bit buswidth using mmc_set_bus_width even if controller doesn't support. Below change has code information. "mmc: Properly determine maximum supported bus width" (sha1: 7798f6dbd5e1a3030ed81a81da5dfb57c3307cac)
Bug log: <mmc plus and emmc cards)
zynq-uboot> mmcinfo Error detected in status(0x208100)! Device: zynq_sdhci Manufacturer ID: fe .....
So enable 8-bit support only for 3.0 spec using CAP and for below 3.0 assign mmc->host_caps = MMC_MODE_8BIT on respective platform driver if host have a support.
Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com
Applied, thanks.
Andy