Re: ANNOUNCE: new "mmc-utils" repository

[Jaehoon Chung <jh80.chung@samsung.com>]

On 02/13/2012 02:03 AM, Chris Ball wrote:

> Hi,
> 
> I've created a repository for userspace mmc tools now:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git
> 
> At the moment the only commands supported are Johan Rudholm's extcsd
> write-protect commands, exposed as:
> 
>    ./mmc extcsd read /dev/mmcblkX
>    ./mmc extcsd write /dev/mmcblkX
> 
> Johan, when I try running these I'm seeing:
> 
> octavius:cjb~/git/mmc-utils % sudo ./mmc extcsd read /dev/mmcblk0
> sdhci-pci 0000:0d:00.0: mmc_blk_ioctl_cmd: cmd error -110
> ioctl: Connection timed out
> Could not read EXT_CSD from /dev/mmcblk0

I tested with SD and eMMC.
In eMMC case..

/opt/home/root # mmc extcsd read /dev/mmcblk0
Power ro locking: possible
Permanent ro locking: possible
ro lock status: not locked

But In SD card,
s3c-sdhci s3c-sdhci.2: mmc_blk_ioctl_cmd: cmd error -110
ioctl: Connection timed out
Could not read EXT_CSD from /dev/mmcblk1

What differ? Anyway..It's great about mmc-utils.

Best Regards,
Jaehoon Chung

> 
> Were you doing something to get the card back into idle state first,
> perhaps?
> 
> Giuseppe, it would be excellent if you could add your ext_csd parsing
> code to the "extcsd read" command.
> 
> Shashidhar, please could you separate out the kernel-side changes needed
> for your test ioctl, and send a patch for kernelspace and one to add an
> "mmc runcmd <cmd>" command to this tool?
> 
> Thanks everyone!  If anyone else has userspace mmc code to contribute,
> feel free to hook it up to this tool and send patches to linux-mmc@.
> 
> - Chris.