hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

mmc: core: Support the optional init_card() callback for MMC and SD 

In (3fcb027 ARM: MXC: mxcmmc: work around a bug in the SDHC busy line
handling) the optional init_card() callback was added.  According to
the original change it was "for now only called from
mmc_sdio_init_card()".

This callback really ought to be called from the SD and MMC init
functions as well.  One current user of this callback
(mxcmci_init_card) will not work as expected if you insert an SDIO
card, then eject it and put a normal SD card in.  Specifically the
normal SD card will not get to run with 4-bit data.

I'd like to use the init_card() callback to handle a similar quirk on
dw_mmc when using SDIO Interrupts (the "low power" feature of the card
needs to be disabled), so that will add a second user of the function.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Doug Anderson 2014-12-02 15:42:45 -08:00 committed by Ulf Hansson
parent a48fd4e77a
commit eac86321b5
2 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/mmc/core/mmc.c
View File

@ -1296,6 +1296,12 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
}
/*
* Call the optional HC's init_card function to handle quirks.
*/
if (host->ops->init_card)
host->ops->init_card(host, card);
/*
* For native busses: set card RCA and quit open drain mode.
*/

7
drivers/mmc/core/sd.c
View File

@ -932,6 +932,12 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
}
/*
* Call the optional HC's init_card function to handle quirks.
*/
if (host->ops->init_card)
host->ops->init_card(host, card);
/*
* For native busses: get card RCA and quit open drain mode.
*/
@ -1271,4 +1277,3 @@ err:
return err;
}