On 17.08.2010 07:05, Reinhard Meyer wrote:

This patch adds SD/MMC support to AT91SAM9260/9XE/9G20 using the generic MMC framework.

Signed-off-by: Reinhard Meyer u-b...@emk-elektronik.de

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+This is a new approach to use Atmel MCI hardware with the +general MMC framework. Therefore it benefits from that +framework's abilities to handle SDHC Cards and the ability +to write blocks.

+- AT91SAM9XE512 (tested, will definitely work with XE128 and XE256) +- AT91SAM9260 (not tested, but MCI is to AT91SAM9XE) +- AT91SAM9G20 (not tested, should work)

I just tested this with U-boot 2010.09 on a custom AT91SAM9G20 board that uses the same MMC connection on MCDA as the 9G20 EK. As Reinhard recommends in README.atmel_mci, I applied an additional patch to board/atmel/at91sam9260ek/at91sam9260ek.c and #defines to include/configs/at91sam9260ek.h. The details of this are described in README.atmel_mci and can be confirmed against this commit in my git repository: https://github.com/rascalmicro/u-boot-rascal/commit/e00be423458ee5fa6764f17a...

With an old 2 GB SanDisk card I had from a Technologic Systems board, it works as expected. I have not tested it with an SDHC card.

For reference, here's a transcript from U-boot:

U-Boot> mmc list mci: 0 U-Boot> mmc part 0 mci: setting clock 258000 Hz, block size 512 mci: setting clock 258000 Hz, block size 512 mci: setting clock 258000 Hz, block size 512 mci: setting clock 258000 Hz, block size 512 mci: setting clock 22016000 Hz, block size 512

Partition Map for MMC device 0 -- Partition Type: DOS

Partition Start Sector Num Sectors Type 1 256 2621184 c 2 2621440 4096 da 3 2625536 4096 da 4 2629632 1048576 83 U-Boot> mmc read 0 0 0 1

MMC read: dev # 0, block # 0, count 1 ... mci: setting clock 258000 Hz, block size 512 mci: setting clock 22016000 Hz, block size 512 mci: setting clock 258000 Hz, block size 512 mci: setting clock 258000 Hz, block size 512 mci: setting clock 22016000 Hz, block size 512 1 blocks read: OK U-Boot> fatls mmc 0:1 binaries/ sources/ distributions/ samples/ workspace/ 3740 readme.txt 116 technologic systems website.url cross-toolchains/ devel-tools/ 507 runeclipse-win.bat 517 runeclipse-win-diskc.bat

4 file(s), 7 dir(s)

Thanks to Reinhard for the code.

Cheers, Brandon Stafford Rascal Micro