Hello, I am working in a MPC8536e custom board. Our custom board has a slot to SDCards conected to the MPC8536e's eSDHC controller. We are using just 4-serial data pins of eSDHC controller.
My kernel is 2.6.35.7 and I am using buildroot to build the root system with uClib. I can mount and read the data from SDCards in the slot. But I am facing errors when I try write something in the card. I am testing two SDcards: Kingston and a LG, both with 2GB capacity. I tryed ext3 and fat32 filesystems with the same results. When the card is detected the log is (observe the ro flag in the first line): mmcblk0: mmc0:57f7 SD02G 1.83 GiB (ro) mmcblk0: mmc0: starting CMD18 arg 00000000 flags 000000b5 mmc0: blksz 512 blocks 8 flags 00000200 tsac 100 ms nsac 0 mmc0: CMD12 arg 00000000 flags 0000049d sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001 sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x0000000a sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001 mmc0: req done (CMD18): 0: 00000900 00000000 00000000 00000000 mmc0: 4096 bytes transferred: 0 mmc0: (CMD12): 0: 00000b00 00000000 00000000 00000000 p1 I am sure the write protection mechanism on SDCard is in the unlock position, but the kernel drivers detects the card like read-only. Has someone idea why this happen? Every idea or tip is apreciated. Regards, Moratelli. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev