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mci: add card_write_protected 

Currently there is no common way for the mci host driver to tell
that thee car is write protected. This adds a card_write_protected callback
which is used by the framework to tell whether it's protected or not.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD 2013-01-25 16:38:27 +01:00 committed by Sascha Hauer
parent 456fae0227
commit 20615ac8c9
2 changed files with 8 additions and 0 deletions
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6
drivers/mci/mci-core.c
View File

@ -1111,8 +1111,14 @@ static int __maybe_unused mci_sd_write(struct block_device *blk,
const void *buffer, int block, int num_blocks)
{
struct mci *mci = container_of(blk, struct mci, blk);
struct mci_host *host = mci->host;
int rc;
if (host->card_write_protected && host->card_write_protected(host)) {
dev_err(mci->mci_dev, "card write protected\n");
return -EPERM;
}
dev_dbg(mci->mci_dev, "%s: Write %d block(s), starting at %d\n",
__func__, num_blocks, block);

2
include/mci.h
View File

@ -302,6 +302,8 @@ struct mci_host {
int (*send_cmd)(struct mci_host*, struct mci_cmd*, struct mci_data*);
/** check if a card is inserted */
int (*card_present)(struct mci_host *);
/** check if a card is write protected */
int (*card_write_protected)(struct mci_host *);
};
/** MMC/SD and interface instance information */