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

In (3fcb027d 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>

drivers/mmc/core/mmc.c

@@ -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.
 	 */

drivers/mmc/core/sd.c

@@ -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 @@ int mmc_attach_sd(struct mmc_host *host)
 
 	return err;
 }
-