Hi Rommel, On Thu, Jan 31, 2013 at 8:14 AM, Rommel Custodio <sessyargc+ub...@gmail.com> wrote: > Dear Jagannadha, > >>Jagannadha Sutradharudu Teki <jagannadha.sutradharudu-teki <at> xilinx.com> > writes: > >> >> Hi Andy, >> >> The latest patch "mmc: Properly determine maximum supported bus width" >> (sha1: 7798f6dbd5e1a3030ed81a81da5dfb57c3307cac) is causing some error status > issue on >> zynq platform with MMC Plus cards. >> >> Here the out what I get with inclusion of this patch on u-boot tree. >> zynq-uboot> mmcinfo >> Error detected in status(0x208100)! >> Device: zynq_sdhci >> Manufacturer ID: 1e >> OEM: ffff >> Name: MMC >> Tran Speed: 52000000 >> Rd Block Len: 512 >> MMC version 4.0 >> High Capacity: No >> Capacity: 1.9 GiB >> Bus Width: 4-bit >> >> When I revert this path, I am unable to see the status error. >> zynq-uboot> mmcinfo >> Device: zynq_sdhci >> Manufacturer ID: 1e >> OEM: ffff >> Name: MMC >> Tran Speed: 52000000 >> Rd Block Len: 512 >> MMC version 4.0 >> High Capacity: No >> Capacity: 1.9 GiB >> Bus Width: 12-bit >> >> I think the above one is also a buggy as my controller is unable to support > 12-bit bus width.? >> > > I've been using the latest u-boot (v2013.01) on ML507 with a custom SDHCI IP. > No > problems detected with this patch. > > The output of both patched and unpatched u-boot seems to be correct. Except > for > the Data CRC Error (bit 21) in the patched version. > > Several things to check: > > 1) Verify the controller settings on both patched and unpatched u-boot. The > printf()s are just prints some IPs (like the one I'm using) don't allow > changing > the register value on some conditions (ie during CMD_INHIBIT and/or > DAT_INHIBIT). This would make the printf()s look correct but the actual > register > value is incorrect. > > 2) Try lowering your SDCLK (ie 25Mhz High-speed mode). > > 3) Try disabling High-speed mode (which limits you to 25MHz Legacy mode).
I tried by minimizing the clock to 25Mhz as an argument of add_sdhci(). but still I am getting the similar issue. Please let me know your inputs. Thanks, Jagan. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
