[U-Boot] at91sam9g45ekes SDHC/MMC

[Henry Súcart]

Hi Albin,

Thanks for all the help :).

After doing some research i found out that I the configuration I need is
!CONFIG_ATMEL_MCI1 since I the interface I'm trying to use is MCI0. When I
try it out it does seem like it's trying to read from it (it immediately
returns with an -EIO if I remove the SD card) and I guess the problem is
with the response.

In the for loop in sd_init_card() it should break out of the loop if either
there is a return value for mmc_acmd() (which only happens when there's an
error) or when (resp[0] & 0x80000000) which I guess is that we read
something successfully. When I run "mmc init 0" it never breaks out of that
loop. I'm guessing that the response should be something like 0x8XXXXXXXX,
then. Am I right? The responses I'm getting are:

mmc: CMD55 0x0 (flags 0x1040)
mmc: status 0x0c000025
mmc: response: 00000120
mmc: CMD41 0x100000 (flags 0x41)
mmc: status 0x0c040025
mmc: response: 00ff8000

What does this number mean? Am I right in my assumption?

Thanks,
Henry

On Tue, Mar 16, 2010 at 6:08 PM, Henry Súcart <henry.sucart at gmail.com>wrote:

> I put the printf you asked for in sd_init_card, right after the for loop.
> Here's the output:
>
> With #define CONFIG_ATMEL_MCI1  1
>
>
> U-Boot> mmc init 0
> mmc: setting clock 150000 Hz, block size 512
>
> mmc: clock 150000 too low; setting CLKDIV to 255
> mmc: CMD0 0x0 (flags 0x0)
> mmc: status 0x0c000025
>
> mmc: CMD0 0x0 (flags 0x100)
> mmc: status 0x0c000025
>
> mmc: CMD55 0x0 (flags 0x1040)
> mmc: status 0x0c000025
> mmc: response: 00000000
>
> HJS: MMCI_CR = 0
> HJS: sd_init_card() mmc_acmd after for loop. ret: -19, resp[0] = 0x6B200020
>
> mmc: CMD0 0x0 (flags 0x0)
> mmc: status 0x0c000025
>
> mmc: CMD0 0x0 (flags 0x100)
> mmc: status 0x0c000025
>
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c000025
> mmc: response: 00000000
>
>
> ...This keeps going for a while and at the end...
>
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c000025
> mmc: response: 00000000
> No MMC card found
>
> With #define CONFIG_ATMEL_MCI1  0
>
> U-Boot> mmc init 0
> mmc: setting clock 150000 Hz, block size 512
>
> mmc: clock 150000 too low; setting CLKDIV to 255
> mmc: CMD0 0x0 (flags 0x0)
> mmc: status 0x0c000025
>
> mmc: CMD0 0x0 (flags 0x100)
> mmc: status 0x0c000025
>
> mmc: CMD55 0x0 (flags 0x1040)
> mmc: status 0x0c000025
> mmc: response: 00000000
>
> HJS: MMCI_CR = 0
> HJS: sd_init_card() mmc_acmd after for loop. ret: -19, resp[0] = 0x6B200020
>
> mmc: CMD0 0x0 (flags 0x0)
> mmc: status 0x0c000025
>
> mmc: CMD0 0x0 (flags 0x100)
> mmc: status 0x0c000025
>
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c000025
> mmc: response: 00000000
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c000025
> mmc: response: 00000000
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c000025
> mmc: response: 00000000
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c000025
> mmc: response: 00000000
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c000025
> mmc: response: 00000000
>
> ...This keeps going for a while and at the end...
>
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c000025
> mmc: response: 00000000
> No MMC card found
>
> If i take out the #define CONFIG_ATMEL_MCI1
>
>
> U-Boot> mmc init 0
> mmc: setting clock 150000 Hz, block size 512
>
> mmc: clock 150000 too low; setting CLKDIV to 255
> mmc: CMD0 0x0 (flags 0x0)
> mmc: status 0x0c000025
>
> mmc: CMD0 0x0 (flags 0x100)
> mmc: status 0x0c000025
>
> mmc: CMD55 0x0 (flags 0x1040)
> mmc: status 0x0c000025
> mmc: response: 00000120
> mmc: CMD41 0x100000 (flags 0x41)
> mmc: status 0x0c040025
> mmc: response: 00ff8000
> mmc: CMD55 0x0 (flags 0x1040)
> mmc: status 0x0c000025
> mmc: response: 00000120
> mmc: CMD41 0x100000 (flags 0x41)
> mmc: status 0x0c040025
> mmc: response: 00ff8000
>
> ... Goes on for a while...
>
> HJS: MMCI_CR = 0
> HJS: sd_init_card() mmc_acmd for loop ret: -110, resp[0] = 0x00FF8000
>
> mmc: CMD0 0x0 (flags 0x0)
> mmc: status 0x0c000025
>
> mmc: CMD0 0x0 (flags 0x100)
> mmc: status 0x0c000025
>
> mmc: CMD1 0x100000 (flags 0x841)
> mmc: status 0x0c100025
>
> mmc: command 1 failed (status: 0x0c100025)
> HJS: error_flags: 0x005B0000, status & error_flags: 0x00100000
> HJS: mmc_init_card() ret = -5
> HJS: mmc_init_card failed
> No MMC card found
>
> In all of them I used the slot J6. I tried it with J5 too but it did the
> same thing.
>
>
> On Tue, Mar 16, 2010 at 4:36 PM, Albin Tonnerre <
> albin.tonnerre at free-electrons.com> wrote:
>
>> On Tue, 16 Mar 2010 08:30 -0400, Henry Súcart wrote :
>> > Here's the command I'm using and the output. I put a debugging statement
>> in
>> > sd_init_card() after the for loop (HJS:).
>> >
>> > U-Boot> mmc init 0
>> > mmc: clock 150000 too low; setting CLKDIV to 255
>> > HJS: sd_init_card() mmc_acmd for loop finished. ret = -19, resp[0] =
>> > 0x6B200020
>> > No MMC card found
>>
>> Err, well, that's weird. I have to admit I can't even guess whether it's
>> trying to read the right slot. Could you please:
>>
>> 1/ add a #define DEBUG at the top of drivers/mmc/atmel_mci.c
>> 2/ get the output of mmc init (0 or 1 doesn't matter) for both
>> CONFIG_ATMEL_MCI1
>> and !CONFIG_ATMEL_MCI1 (with the SD card staying in the same slot, of
>> course)
>> 3/ In the process, add a debug printf in the mci driver displaying the
>> value of
>> MMCI_CR (you'd get that by calling mmci_readl(CR))
>>
>> I'm sorry I can't help you further. Unfortunately I don't own such
>> hardware, and
>> this kind of thing is rather hard to debug remotely.
>>
>> Regards,
>> --
>> Albin Tonnerre, Free Electrons
>> Kernel, drivers and embedded Linux development,
>> consulting, training and support.
>> http://free-electrons.com
>>
>
>