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sdhci: sdio interrupt support

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Add support for relaying the sdio interrupt signal from the card.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman 2007-09-04 07:59:18 +02:00
parent 15b82b46de
commit f75979b77f
1 changed files with 38 additions and 1 deletions
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39
drivers/mmc/host/sdhci.c
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@ -800,10 +800,35 @@ static int sdhci_get_ro(struct mmc_host *mmc)
return !(present & SDHCI_WRITE_PROTECT);
}
static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
{
struct sdhci_host *host;
unsigned long flags;
u32 ier;
host = mmc_priv(mmc);
spin_lock_irqsave(&host->lock, flags);
ier = readl(host->ioaddr + SDHCI_INT_ENABLE);
ier &= ~SDHCI_INT_CARD_INT;
if (enable)
ier |= SDHCI_INT_CARD_INT;
writel(ier, host->ioaddr + SDHCI_INT_ENABLE);
writel(ier, host->ioaddr + SDHCI_SIGNAL_ENABLE);
mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
static const struct mmc_host_ops sdhci_ops = {
.request = sdhci_request,
.set_ios = sdhci_set_ios,
.get_ro = sdhci_get_ro,
.enable_sdio_irq = sdhci_enable_sdio_irq,
};
/*****************************************************************************\
@ -1012,6 +1037,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
irqreturn_t result;
struct sdhci_host* host = dev_id;
u32 intmask;
int cardint = 0;
spin_lock(&host->lock);
@ -1056,6 +1082,11 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
intmask &= ~SDHCI_INT_BUS_POWER;
if (intmask & SDHCI_INT_CARD_INT)
cardint = 1;
intmask &= ~SDHCI_INT_CARD_INT;
if (intmask) {
printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n",
mmc_hostname(host->mmc), intmask);
@ -1070,6 +1101,12 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
out:
spin_unlock(&host->lock);
/*
* We have to delay this as it calls back into the driver.
*/
if (cardint)
mmc_signal_sdio_irq(host->mmc);
return result;
}
@ -1309,7 +1346,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
mmc->ops = &sdhci_ops;
mmc->f_min = host->max_clk / 256;
mmc->f_max = host->max_clk;
mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE;
mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_SDIO_IRQ;
if (caps & SDHCI_CAN_DO_HISPD)
mmc->caps |= MMC_CAP_SD_HIGHSPEED;