Problem with at91_mci and AT91RM9200

Problem with at91_mci and AT91RM9200

[Łukasz Góralczyk]

Recently I bough a cheap board with Atmel AT92RM9200 CPU and
preinstalled patched kernel 2.6.21 to play with. Board is NGX Blueboard
ARM9 and it's based (almost a 1:1 copy) on ECB_AT91
( http://en.wikipedia.org/wiki/ECB_AT91 ) which is supported in kernel.
I was able to do basic things with it (boot from SD, Ethernet).

I compiled newest kernel (2.6.33.4 and 2.6.32 with at91 patches
http://www.at91.com/linux4sam/bin/view/Linux4SAM/LinuxKernel#AT91_Linux_kernel_sources_summar )
which boots but fails to detect SD Card (Sandisk microSD 2 GB through SD
adapter). A the end there's a debugging output (stripped, full:
http://liku.ayz.pl/at91mmc ).

I started to look for a cause of the problem but asking here may save me
some time:
* does anybody still, successfully, uses this CPU and newest at_mci
driver?
* What might be the cause of this error?
* Perhaps CPU is it too obsolete and I should stay with old kernel
(+errata has a lot of problems for mci subsystem)?

What I have already tried:
* I checked hardware connections between card socket and CPU (as well as
other possible hardware causes),
* tried at91 and atmel mci driver, on atmel mci driver nothing happens,
* tried different kernel versions (patched .32 and unpatched .33),
* started to patch new kernel with old patches from ECB but whole mci
subsystem changed.

Regards,
Lukasz.

--- start ---
[cut]
at91_mci at91_mci: 4 wire bus mode not supported - using 1 wire
mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
MMC: Setting controller bus width to 1
Added MCI driver
mmc0: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 21 width 0 timing 0
MMC: Setting controller bus width to 1
TCP cubic registered
NET: Registered protocol family 10
NET: Registered protocol family 17
mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0
clkdiv = 74. mcck = 399360
MMC: Setting controller bus width to 1
mmc0: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 21 width 0 timing 0
clkdiv = 74. mcck = 399360
MMC: Setting controller bus width to 1
at91_rtc at91_rtc: setting system clock to 1998-01-01 00:00:24 UTC
(883612824)
Waiting 1sec before mounting root device...
mmc0: starting CMD0 arg 00000000 flags 000000c0
Sending command 0 as 00000800, arg = 00000000, blocks = 0, length = 0
(MR = 0000834A)
MCI irq: status = 0000C0E5, C07F0001, 00000001
Command ready
Completed command
Status = 00000001/0000c0e5 [00000000 00000000 00000000 00000000]
mmc0: req done (CMD0): 0: 00000000 00000000 00000000 00000000
mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0
clkdiv = 74. mcck = 399360
MMC: Setting controller bus width to 1
mmc0: starting CMD8 arg 000001aa flags 000002f5
Sending command 8 as 00001848, arg = 000001AA, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0010C0E5, C07F0001, 00100001
MMC: Response timeout
Completed command
Status = 00100001/0010c0e5 [00000000 00000000 00000000 00000000]
Error detected and set to -110/0 (cmd = 8, retries = 0)
mmc0: req done (CMD8): -110: 00000000 00000000 00000000 00000000
mmc0: starting CMD5 arg 00000000 flags 000002e1
Sending command 5 as 00001845, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0010C0E5, C07F0001, 00100001
MMC: Response timeout
Completed command
Status = 00100001/0010c0e5 [00000000 00000000 00000000 00000000]
Error detected and set to -110/0 (cmd = 5, retries = 3)
mmc0: req failed (CMD5): -110, retrying...
Sending command 5 as 00001845, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0010C0E5, C07F0001, 00100001
MMC: Response timeout
Completed command
Status = 00100001/0010c0e5 [00000000 00000000 00000000 00000000]
Error detected and set to -110/0 (cmd = 5, retries = 2)
mmc0: req failed (CMD5): -110, retrying...
Sending command 5 as 00001845, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0010C0E5, C07F0001, 00100001
MMC: Response timeout
Completed command
Status = 00100001/0010c0e5 [00000000 00000000 00000000 00000000]
Error detected and set to -110/0 (cmd = 5, retries = 1)
mmc0: req failed (CMD5): -110, retrying...
Sending command 5 as 00001845, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0010C0E5, C07F0001, 00100001
MMC: Response timeout
Completed command
Status = 00100001/0010c0e5 [00000000 00000000 00000000 00000000]
Error detected and set to -110/0 (cmd = 5, retries = 0)
mmc0: req done (CMD5): -110: 00000000 00000000 00000000 00000000
mmc0: starting CMD55 arg 00000000 flags 000000f5
Sending command 55 as 00001877, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0002C0E4, C07F0001, 00020000
MMC: Response direction error
Completed command
Status = 00020000/0006c0e5 [FFFFFFFF 00000000 00000000 00000000]
Error detected and set to -5/0 (cmd = 55, retries = 0)
mmc0: req done (CMD55): -5: ffffffff 00000000 00000000 00000000
mmc0: starting CMD55 arg 00000000 flags 000000f5
Sending command 55 as 00001877, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0002C0E4, C07F0001, 00020000
MMC: Response direction error
Completed command
Status = 00020000/0006c0e5 [FFFFFFFF 00000000 00000000 00000000]
Error detected and set to -5/0 (cmd = 55, retries = 0)
mmc0: req done (CMD55): -5: ffffffff 00000000 00000000 00000000
mmc0: starting CMD55 arg 00000000 flags 000000f5
Sending command 55 as 00001877, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0002C0E4, C07F0001, 00020000
MMC: Response direction error
Completed command
Status = 00020000/0006c0e5 [FFFFFFFF 00000000 00000000 00000000]
Error detected and set to -5/0 (cmd = 55, retries = 0)
mmc0: req done (CMD55): -5: ffffffff 00000000 00000000 00000000
mmc0: starting CMD55 arg 00000000 flags 000000f5
Sending command 55 as 00001877, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0002C0E4, C07F0001, 00020000
MMC: Response direction error
Completed command
Status = 00020000/0006c0e5 [FFFFFFFF 00000000 00000000 00000000]
Error detected and set to -5/0 (cmd = 55, retries = 0)
mmc0: req done (CMD55): -5: ffffffff 00000000 00000000 00000000
mmc0: starting CMD1 arg 00000000 flags 000000e1
Sending command 1 as 00001841, arg = 00000000, blocks = 0, length = 0
(MR = 0000034A)
MCI irq: status = 0002C0E4, C07F0001, 00020000
MMC: Response direction error
Completed command
Status = 00020000/0006c0e5 [FFFFFFFF 00000000 00000000 00000000]
Error detected and set to -5/0 (cmd = 1, retries = 0)
mmc0: req done (CMD1): -5: ffffffff 00000000 00000000 00000000
mmc0: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
MMC: Setting controller bus width to 1
VFS: Cannot open root device "mmcblk0p1" or unknown-block(0,0)
Please append a correct "root=" boot option; here are the available
partitions:
[cut]
--- end ---

Problem with at91_mci and AT91RM9200

[zql at glomationinc.com]

> Recently I bough a cheap board with Atmel AT92RM9200 CPU and
> preinstalled patched kernel 2.6.21 to play with. Board is NGX Blueboard
> ARM9 and it's based (almost a 1:1 copy) on ECB_AT91
> ( http://en.wikipedia.org/wiki/ECB_AT91 ) which is supported in kernel.
> I was able to do basic things with it (boot from SD, Ethernet).
>
> I compiled newest kernel (2.6.33.4 and 2.6.32 with at91 patches
> http://www.at91.com/linux4sam/bin/view/Linux4SAM/LinuxKernel#AT91_Linux_kernel_sources_summar
> )
> which boots but fails to detect SD Card (Sandisk microSD 2 GB through SD
> adapter). A the end there's a debugging output (stripped, full:
> http://liku.ayz.pl/at91mmc ).
>
> I started to look for a cause of the problem but asking here may save me
> some time:
> * does anybody still, successfully, uses this CPU and newest at_mci
> driver?
> * What might be the cause of this error?
> * Perhaps CPU is it too obsolete and I should stay with old kernel
> (+errata has a lot of problems for mci subsystem)?
>
> What I have already tried:
> * I checked hardware connections between card socket and CPU (as well as
> other possible hardware causes),
> * tried at91 and atmel mci driver, on atmel mci driver nothing happens,
> * tried different kernel versions (patched .32 and unpatched .33),
> * started to patch new kernel with old patches from ECB but whole mci
> subsystem changed.
>
> Regards,
> Lukasz.
>

The MMC/SD card driver is broken for Atmel 9G20 as well since 2.6.30.  It
no longer detect cards that used to work on 2.6.27.

Problem with at91_mci and AT91RM9200

[Łukasz Góralczyk]

Dnia 2010-05-27, czw o godzinie 09:39 -0500, zql at glomationinc.com pisze:
[cut]
> > I compiled newest kernel (2.6.33.4 and 2.6.32 with at91 patches
> > http://www.at91.com/linux4sam/bin/view/Linux4SAM/LinuxKernel#AT91_Linux_kernel_sources_summar
> > )
> > which boots but fails to detect SD Card (Sandisk microSD 2 GB through SD
> > adapter). A the end there's a debugging output (stripped, full:
[cut]
> The MMC/SD card driver is broken for Atmel 9G20 as well since 2.6.30.  It
> no longer detect cards that used to work on 2.6.27.

In my case 2.6.27 doesn't work either - symptoms are similar as for
2.6.33.

Lukasz.

Problem with at91_mci and AT91RM9200

[Łukasz Góralczyk]

On 2010-05-27 13:24, ?ukasz G?ralczyk wrote:
[cut]
> I compiled newest kernel (2.6.33.4 and 2.6.32 with at91 patches
> http://www.at91.com/linux4sam/bin/view/Linux4SAM/LinuxKernel#AT91_Linux_kernel_sources_summar )
> which boots but fails to detect SD Card (Sandisk microSD 2 GB through SD
> adapter). A the end there's a debugging output (stripped, full:
> http://liku.ayz.pl/at91mmc ).
[cut]

Solution is to lower clock speed from 400k Hz to 150k Hz (350k and 300k
didn't work) in drivers/mmc/core/core.c around line 915.

Lukasz.