Hello,

I have a problem with my MMC driver. I use at91sam9260 with linux-2.6.21+patch.arm. My kernel is in RAM and my rootfs in NFS.
For the moment I want simply mount MMC but after I hope to use the MMC for my rootfs.
So I compile mmc.c, mmc_block.c and at91_mci.c with the patch of Nicolas Ferré. My config is :
<M> MMC support
[*] MMC debugging
<M> MMC block device driver
<M> AT91 SD/MMC Card Interface support

Then the kernel boot and I make :
$ mknod /dev/mmcblk b 254 0
$ mknod /dev/mmcblk0 b 254 1
$
$ insmod mmc_core
$ insmod mmc_block
$ insmod at91_mci
$ lsmod
Module Size Used by Not tainted
at91_mci 8744 -
mmc_block 6512 -
mmc_core 22328 -
$
$ mkdir /mnt/mmc
$ mount /dev/mmcblk0 /mnt/mmc/
mount: mounting /dev/mmcblk0 on /mnt/mmc/ failed

This is the problem !!!!!!!!!!!! And I don't know why ...

If it can help you:
$ dmesg | grep mmc
PM: Adding info for No Bus:mmc0
mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
mmc0: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 21 width 0 timing 0
mmc0: clock 375000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0
mmc0: clock 375000Hz busmode 1 powermode 2 cs 1 Vdd 21 width 0 timing 0
mmc0: starting CMD0 arg 00000000 flags 00000040
mmc0: req done (CMD0): 0/0/0: 00000000 00000000 00000000 00000000
mmc0: clock 375000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0
mmc0: starting CMD8 arg 000001aa flags 00000075
mmc0: req done (CMD8): 1/0/0: 00000000 00000000 00000000 00000000
mmc0: starting CMD55 arg 00000000 flags 00000015
mmc0: req done (CMD55): 1/0/0: 00000000 00000000 00000000 00000000
mmc0: starting CMD55 arg 00000000 flags 00000015
mmc0: req done (CMD55): 1/0/0: 00000000 00000000 00000000 00000000
mmc0: starting CMD55 arg 00000000 flags 00000015
mmc0: req done (CMD55): 1/0/0: 00000000 00000000 00000000 00000000
mmc0: starting CMD55 arg 00000000 flags 00000015
mmc0: req done (CMD55): 1/0/0: 00000000 00000000 00000000 00000000
mmc0: starting CMD1 arg 00000000 flags 00000061
mmc0: req done (CMD1): 1/0/0: 00000000 00000000 00000000 00000000
mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0

I have already try with many things but nothing.

Can you help me please? Could you send me full files at91_mci.c, mmc.c and mmc_block.c that work with 2.6.21 on arm?

Thanks

Pierre