Commit ad080d79 authored by Kevin Liu's avatar Kevin Liu Committed by Chris Ball

mmc: sdhci: add IRQ wake up support

Don't disable SD Host IRQ during suspend if it is wake up source.
Enable wakeup event during suspend.
Signed-off-by: default avatarJialing Fu <jlfu@marvell.com>
Signed-off-by: default avatarKevin Liu <kliu5@marvell.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent b0a8dece
......@@ -2458,6 +2458,32 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
\*****************************************************************************/
#ifdef CONFIG_PM
void sdhci_enable_irq_wakeups(struct sdhci_host *host)
{
u8 val;
u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE
| SDHCI_WAKE_ON_INT;
val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
val |= mask ;
/* Avoid fake wake up */
if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
val &= ~(SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE);
sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
}
EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups);
void sdhci_disable_irq_wakeups(struct sdhci_host *host)
{
u8 val;
u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE
| SDHCI_WAKE_ON_INT;
val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
val &= ~mask;
sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
}
EXPORT_SYMBOL_GPL(sdhci_disable_irq_wakeups);
int sdhci_suspend_host(struct sdhci_host *host)
{
......@@ -2487,9 +2513,13 @@ int sdhci_suspend_host(struct sdhci_host *host)
return ret;
}
if (!device_may_wakeup(mmc_dev(host->mmc))) {
sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK);
free_irq(host->irq, host);
} else {
sdhci_enable_irq_wakeups(host);
enable_irq_wake(host->irq);
}
return ret;
}
......@@ -2504,10 +2534,15 @@ int sdhci_resume_host(struct sdhci_host *host)
host->ops->enable_dma(host);
}
if (!device_may_wakeup(mmc_dev(host->mmc))) {
ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
mmc_hostname(host->mmc), host);
if (ret)
return ret;
} else {
sdhci_disable_irq_wakeups(host);
disable_irq_wake(host->irq);
}
if ((host->mmc->pm_flags & MMC_PM_KEEP_POWER) &&
(host->quirks2 & SDHCI_QUIRK2_HOST_OFF_CARD_ON)) {
......@@ -2535,17 +2570,6 @@ int sdhci_resume_host(struct sdhci_host *host)
}
EXPORT_SYMBOL_GPL(sdhci_resume_host);
void sdhci_enable_irq_wakeups(struct sdhci_host *host)
{
u8 val;
val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
val |= SDHCI_WAKE_ON_INT;
sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
}
EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups);
#endif /* CONFIG_PM */
#ifdef CONFIG_PM_RUNTIME
......
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