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authorWolfram Sang <w.sang@pengutronix.de>2010-10-15 12:21:01 +0200
committerChris Ball <cjb@laptop.org>2010-10-23 21:11:21 +0800
commit2dfb579c7da171f6153cd58e8fbf7dcfe684778d (patch)
treee54663068118de6dcd2d48fe6894d37c0a02bdbc /drivers/mmc/host/sdhci.c
parentd3b993dcc11cd291e6908ed02b9db99970220952 (diff)
mmc: sdhci: introduce get_ro private write-protect hook
Some controllers handle their write-protection differently. Introduce a callback to be able to handle it, ensuring the same locking takes place for it. Rename the status variable to make it more obvious why the read from the registers needs to be inverted. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Eric BĂ©nard <eric@eukrea.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
-rw-r--r--drivers/mmc/host/sdhci.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 9cb60bac195..782c0ee3c92 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1223,22 +1223,25 @@ static int sdhci_get_ro(struct mmc_host *mmc)
{
struct sdhci_host *host;
unsigned long flags;
- int present;
+ int is_readonly;
host = mmc_priv(mmc);
spin_lock_irqsave(&host->lock, flags);
if (host->flags & SDHCI_DEVICE_DEAD)
- present = 0;
+ is_readonly = 0;
+ else if (host->ops->get_ro)
+ is_readonly = host->ops->get_ro(host);
else
- present = sdhci_readl(host, SDHCI_PRESENT_STATE);
+ is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE)
+ & SDHCI_WRITE_PROTECT);
spin_unlock_irqrestore(&host->lock, flags);
- if (host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT)
- return !!(present & SDHCI_WRITE_PROTECT);
- return !(present & SDHCI_WRITE_PROTECT);
+ /* This quirk needs to be replaced by a callback-function later */
+ return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ?
+ !is_readonly : is_readonly;
}
static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)