[U-Boot] mmc erase fails from U-Boot command line

[Fabio Estevam]

Hi Eric,

On Wed, Dec 2, 2015 at 5:28 PM, Eric Nelson <eric at nelint.com> wrote:

> You're hitting the block from a different path than we are and it will
> be tomorrow before I can get an offending board on my desk.
>
> What happens if you "#if 0" around this block?

Then the error changes to:

=> mmc erase 4000 1000

MMC erase: dev # 2, block # 16384, count 4096 ... Timeout waiting card ready
0 blocks erased: ERROR

>
> http://git.denx.de/?p=u-boot.git;a=blob;f=drivers/mmc/fsl_esdhc.c;h=c5054d66bdcda029f0485958c87bd5154ccee591;hb=HEAD#l390
>
> Do you know which command is failing? It should be one of these:
>         MMC_CMD_ERASE_GROUP_START
>         MMC_CMD_ERASE_GROUP_END
>         MMC_CMD_ERASE

It is MMC_CMD_ERASE as shown below.

>
> http://git.denx.de/?p=u-boot.git;a=blob;f=drivers/mmc/mmc_write.c;h=7aea7e943b9e05c8aa537653f4ae8878ecb1b04b;hb=HEAD#l17
>
> I think you can instrument and find out using this:
>
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index 53084a7..8f5d9e1 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -105,6 +105,9 @@ int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd
> *cmd, struct mmc_data *data)
>  #else
>         ret = mmc->cfg->ops->send_cmd(mmc, cmd, data);
>  #endif
> +       if (ret)
> +               printf("error %d from CMD_SEND:%d\n", ret, cmd->cmdidx);
> +
>         return ret;

Applying this change on top of head I get:

=> mmc erase 4000 1000

MMC erase: dev # 2, block # 16384, count 4096 ... Timeout waiting for DAT0 to go
 high!
error -19 from CMD_SEND:38
mmc erase failed
0 blocks erased: ERROR
=>

Thanks