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SD Card Detection / Mounting Problems Under Linux

Phil G.
Prodigy 20 points

I have built a kernel for my davinci board with the follow options:

#

# OTG and related infrastructure
#
CONFIG_USB_OTG_UTILS=y
# CONFIG_USB_GPIO_VBUS is not set
CONFIG_NOP_USB_XCEIV=m
CONFIG_MMC=y
CONFIG_MMC_DEBUG=y
# CONFIG_MMC_UNSAFE_RESUME is not set

#
# MMC/SD/SDIO Card Drivers
#
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
# CONFIG_SDIO_UART is not set
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
CONFIG_MMC_SDHCI=y
# CONFIG_MMC_SDHCI_PLTFM is not set
# CONFIG_MMC_SPI is not set
# CONFIG_MEMSTICK is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_NEW_LEDS is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set

When I boot my davinci board with this new kernel and insert the SD card (formatted to ext2) it is not detected in /proc/partitions.

dmesg doesn't look any different with the card removed or inserted. Any advice?

I could be going about this all wrong.

  • 0
    Guru 31670 points

    Phil,

    Have you enabled the DAVINCI host controller in your configs? Use "menuconfig" to set it. 

  • 0 in reply to Renjith Thomas
    Prodigy 20 points

    I don't seem to have that option with kernel version 2.6.31.12. It seems like support wasn't added until version 2.6.33 or so. I'll see if I can do something with this.

    EDIT: Just did a make menuconfig with kernel 2.6.34.13 and I didn't see a DAVINCI host controller option, although the files are there and the option is in the drivers/mmc/host/Kconfig file

    Is there a recomended kernel to use?

  • 0 in reply to Phil G.
    Guru 31670 points

    Phil,

    Can you do a search of the Kconfig field for DAVINCI Host controller in menuconfig by typing the search command "/" in  menuconfig window? It will give the description of the path where you can find the davinci host controller config, which can be enabled then.