microSD driver for beagleboard-xm

Rajeev Kumar

Other Parts Discussed in Thread: DM3730

Hi,

I am writing microSD driver for dm3730 SOC..

As u-boot has already initialized the mmc/sd/sdio controller .

it is getting stuck in command transfer flow..

while ((mmc_base.pstate & 1) == 1); /* check cmd line */

that means cmd line is busy.. because microSD is in transfer mode..

anyone having idea how to change the mode..

Cvetolin Shulev-XID over 12 years ago

Hi Rajeev,

You can refer to the mmc driver in the official TI's dvsdk releases to compare the functionality.

../u-boot/drivers/mmc/omap3_mmc.c

Tsvetolin Shulev

Rajeev Kumar over 12 years ago in reply to Cvetolin Shulev-XID

Hi Cvetolin,

Thanks for your suggestion ..

I’m referring the same u-boot code and it is not implemented properly.

MLO --> U-boot -> threadx(OS).

In command transfer function status bit it is showing 0(always).

So, it is getting stuck in while loop.

Processors forum