* [U-Boot-Users] MMC Card Problems with U-Boot 1.1.6
@ 2007-02-07 19:09 sgobien
2007-02-13 22:27 ` Pete MacKay
0 siblings, 1 reply; 4+ messages in thread
From: sgobien @ 2007-02-07 19:09 UTC (permalink / raw)
To: u-boot
Hello.
I?m using U-Boot 1.1.6, and I?m having problems with the MMC support. My
board is a custom board based on the PXA270 CPU, with 128MB of SDRAM and 64MB
of internal flash. Using the loadb command, I can successfully copy my
filesystem to the SDRAM. Then, I use the cp.b command to transfer it to flash.
Everything works properly and the filesystem transfers without any problem.
Next, I tried using the fatload command to copy the same exact filesystem from
the MMC card to SDRAM. U-Boot claims that the entire file was copied
correctly as indicated by the filesize environment variable. However, once I
move the filesystem to flash, it ends up corrupted in the flash. I can only
conclude that the fatload command has incorrectly copied the filesystem from
the MMC card to SDRAM.
Has anybody had trouble using MMC cards and the fat commands with a PXA270
CPU? I don?t receive any error messages, so I?m not really sure where to look.
Thanks in advance for any guidance.
Steve
^ permalink raw reply [flat|nested] 4+ messages in thread
* [U-Boot-Users] MMC Card Problems with U-Boot 1.1.6
2007-02-07 19:09 [U-Boot-Users] MMC Card Problems with U-Boot 1.1.6 sgobien
@ 2007-02-13 22:27 ` Pete MacKay
2007-02-13 22:51 ` Haavard Skinnemoen
0 siblings, 1 reply; 4+ messages in thread
From: Pete MacKay @ 2007-02-13 22:27 UTC (permalink / raw)
To: u-boot
What kind of MMC cards are you using? We're in the same boat and haven't
been able to initialize Patriot 512MB cards. I've rewritten/added to the
code for SD 2.0 (added 'sdinit' and an sd interface) and am seeing portions
of the data dropped when I read blocks from a 512MB SanDisk SD 2.0 card.
We're clocking at 10 MHz, running a 312 MHz PXA-270 (with turbo mode), and
both cards work fine under our 2.6.18 kernel.
You can define DEBUG and MMC_DEBUG and rebuild u-boot to look at the command
outputs. Our MMC_STAT register reads 0x2140 on successful commands and
0x2142 on timeouts.
Has anyone been able to copy file systems correctly with MMC or SD on the
PXA-270? I'm not convinced this ever worked.
sgobien wrote:
>
> I?m using U-Boot 1.1.6, and I?m having problems with the MMC support. My
> board is a custom board based on the PXA270 CPU, with 128MB of SDRAM and
> 64MB
> of internal flash. Using the loadb command, I can successfully copy my
> filesystem to the SDRAM. Then, I use the cp.b command to transfer it to
> flash.
> Everything works properly and the filesystem transfers without any
> problem.
>
> Next, I tried using the fatload command to copy the same exact filesystem
> from
> the MMC card to SDRAM. U-Boot claims that the entire file was copied
> correctly as indicated by the filesize environment variable. However,
> once I
> move the filesystem to flash, it ends up corrupted in the flash. I can
> only
> conclude that the fatload command has incorrectly copied the filesystem
> from
> the MMC card to SDRAM.
>
> Has anybody had trouble using MMC cards and the fat commands with a PXA270
> CPU? I don?t receive any error messages, so I?m not really sure where to
> look.
>
> Thanks in advance for any guidance.
>
> Steve
>
--
View this message in context: http://www.nabble.com/MMC-Card-Problems-with-U-Boot-1.1.6-tf3189031.html#a8954799
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^ permalink raw reply [flat|nested] 4+ messages in thread
* [U-Boot-Users] MMC Card Problems with U-Boot 1.1.6
2007-02-13 22:27 ` Pete MacKay
@ 2007-02-13 22:51 ` Haavard Skinnemoen
2007-02-14 0:05 ` Pete MacKay
0 siblings, 1 reply; 4+ messages in thread
From: Haavard Skinnemoen @ 2007-02-13 22:51 UTC (permalink / raw)
To: u-boot
On 2/13/07, Pete MacKay <linux@architechnical.net> wrote:
>
> What kind of MMC cards are you using? We're in the same boat and haven't
> been able to initialize Patriot 512MB cards. I've rewritten/added to the
> code for SD 2.0 (added 'sdinit' and an sd interface) and am seeing portions
> of the data dropped when I read blocks from a 512MB SanDisk SD 2.0 card.
> We're clocking at 10 MHz, running a 312 MHz PXA-270 (with turbo mode), and
> both cards work fine under our 2.6.18 kernel.
I think I know where I'd start looking ;-)
/* FIXME fill in the correct size (is set to 32MByte) */
mmc_dev.blksz = 512;
mmc_dev.lba = 0x10000;
Btw, why do you need an sdinit command? It should be possible to tell
the difference between SD and MMC cards automatically. In fact, I know
it's possible because the Linux driver does it, and the at32ap7000 mmc
driver I haven't submitted yet does it.
Haavard
^ permalink raw reply [flat|nested] 4+ messages in thread
* [U-Boot-Users] MMC Card Problems with U-Boot 1.1.6
2007-02-13 22:51 ` Haavard Skinnemoen
@ 2007-02-14 0:05 ` Pete MacKay
0 siblings, 0 replies; 4+ messages in thread
From: Pete MacKay @ 2007-02-14 0:05 UTC (permalink / raw)
To: u-boot
Thanks for the pointers! I replaced that with the values read from the CSD,
which was a task in itself as the 270 seemed to add a 0x3F and drop the
CRC/0x01 byte in the response (which is reversed byte-order).
You're right that the cards can be told apart with the proper init sequence
(the right way for submission), but I added 'sd' commands and interface in
the interest of time and preserving the original MMC code line. Fortunately
adding commands to u-boot is easy! :) CMD1 isn't supported in SD 2.0 (it
times out), which does added negotiation (CMD8/ACMD41). Linux very recently
added SDHC (high capacity) support and last I heard they were debating
whether the sequence should check for MMC first (CMD1) or SD (CMD8).
Alas, the kernel code is layered and complex, but is a good place to start.
I've been looking through it for 270 caveats (there are several) and now my
brain hurts...
Haavard Skinnemoen-2 wrote:
>
> I think I know where I'd start looking ;-)
>
> /* FIXME fill in the correct size (is set to 32MByte) */
> mmc_dev.blksz = 512;
> mmc_dev.lba = 0x10000;
>
> Btw, why do you need an sdinit command? It should be possible to tell
> the difference between SD and MMC cards automatically. In fact, I know
> it's possible because the Linux driver does it, and the at32ap7000 mmc
> driver I haven't submitted yet does it.
>
> Haavard
>
--
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^ permalink raw reply [flat|nested] 4+ messages in thread
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2007-02-07 19:09 [U-Boot-Users] MMC Card Problems with U-Boot 1.1.6 sgobien
2007-02-13 22:27 ` Pete MacKay
2007-02-13 22:51 ` Haavard Skinnemoen
2007-02-14 0:05 ` Pete MacKay
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