Re: [PATCH v4 2/3]mmc: enable TRIM/ERASE caps for SDHCI host

Andrei Warkentin
2011-04-04T04:06:13Z

On Sat, Feb 12, 2011 at 12:22 AM, Chuanxiao Dong
<chuanxiao.dong@intel.com> wrote:
> SDHCI host controller has TRIM/ERASE capability, enable these caps for erasing
> purpose.
>
> ERASE command needs R1B response. So for such command with busy signal, before
> sending command, SDHCI host driver will simply set a maximum value for timeout
> control register which is safe to use.
>

Awesome. I took a look at the eMMC spec, and the following commands
also have R1B responses:

1) CMD5 (SLEEP_AWAKE)
2) CMD6 (SWITCH)
3) CMD7 (Select/Deselect - for Disconnected->Programming transitions)
4) CMD12 (STOP_TRANSMISSION - for write case)
5) CMD28 (SET_WRITE_PROT)
6) CMD29 (CLR_WRITE_PROT)

...so this should help with timeouts for those commands as well. Thanks!

A