diff options
| author | Kevin Liu <kliu5@marvell.com> | 2013-01-05 17:21:33 +0800 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-02-11 13:28:50 -0500 |
| commit | ad080d7916a4701fda29a442a69be4fd54d19a2e (patch) | |
| tree | 3ff4ae7bf39beb0862e6300953560f98d9bcf5ba /drivers/mmc/host | |
| parent | b0a8dece55ebe792b394e0c73fa365ad24c3ec32 (diff) | |
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: Jialing Fu <jlfu@marvell.com>
Signed-off-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 60 |
1 files changed, 42 insertions, 18 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 1165376592b9..b93076764ddd 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2458,6 +2458,32 @@ out: \*****************************************************************************/ #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; } - sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK); - free_irq(host->irq, host); - + 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); } - ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, - mmc_hostname(host->mmc), host); - if (ret) - return ret; + 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 |