Hi everyone,
I'm trying to get the MMC3 slot working on my OMAP3503 Gumstix Overo
based board working.
Compiling 2.6.29-omap1 with
CONFIG_MMC=y
CONFIG_MMC_DEBUG=y
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
and MMC polling enabled (mmc->caps |= MMC_CAP_NEEDS_POLL; in omap_hsmmc.c)
then doing: $ echo 8 > /proc/sys/kernel/printk
gives the following:
clock 0Hz busmode 1 powermode 1 cs 0 Vdd 20 width 0 timing 0
mmc2: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 20 width 0 timing 0
mmc2: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 20 width 0 timing 0
mmc2: starting CMD0 arg 00000000 flags 000000c0
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD0, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 1
mmc2: req done (CMD0): 0: 00000000 00000000 00000000 00000000
mmc2: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 20 width 0 timing 0
mmc2: starting CMD8 arg 000001aa flags 000002f5
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD8, argument 0x000001aa
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req done (CMD8): -110: 00000000 00000000 00000000 00000000
mmc2: starting CMD5 arg 00000000 flags 000002e1
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD5, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req failed (CMD5): -110, retrying...
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD5, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req failed (CMD5): -110, retrying...
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD5, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req failed (CMD5): -110, retrying...
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD5, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req done (CMD5): -110: 00000000 00000000 00000000 00000000
mmc2: starting CMD55 arg 00000000 flags 000000f5
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD55, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req done (CMD55): -110: 00000000 00000000 00000000 00000000
mmc2: starting CMD55 arg 00000000 flags 000000f5
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD55, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req done (CMD55): -110: 00000000 00000000 00000000 00000000
mmc2: starting CMD55 arg 00000000 flags 000000f5
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD55, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req done (CMD55): -110: 00000000 00000000 00000000 00000000
mmc2: starting CMD55 arg 00000000 flags 000000f5
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD55, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req done (CMD55): -110: 00000000 00000000 00000000 00000000
mmc2: starting CMD1 arg 00000000 flags 000000e1
mmci-omap-hs mmci-omap-hs.2: mmc2: CMD1, argument 0x00000000
mmci-omap-hs mmci-omap-hs.2: IRQ Status is 18000
mmci-omap-hs mmci-omap-hs.2: MMC IRQ 0x18000 : ERRI CTO
mmc2: req done (CMD1): -110: 00000000 00000000 00000000 00000000
mmc2: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
It seems every request returns -110 which is -ETIMEDOUT.
I've checked the hardware, and it appears to be correct (level
translators etc seem to be doing their job).
During polling, the CMD and CLK signals show activity, but the data
lines never change; this is presumably why every request is timing
out.
I've also tried it with 2.6.30-omap1 in git, which changes some
MMC3-specific stuff (notably DMA), but has the exact same behaviour.
I've also checked pin multiplexing settings and confirmed that the
correct values are set for the MMC3 data pins. The card I'm using is a
microSD card that works when attached to MMC1 (the Gumstix Overo
built-in microSD slot). The slot is powered by 3.3V that is always on,
there is no provision for power switching with this particular board.
Any ideas?
Many thanks,
Hugo Vincent
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