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sdio: sdhci support for suspend mode PM features 

Tested with an XO v1.5 from OLPC.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Nicolas Pitre 2010-03-05 13:43:32 -08:00 committed by Linus Torvalds
parent da68c4eb25
commit 2f4cbb3d83
2 changed files with 31 additions and 12 deletions
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17
drivers/mmc/host/sdhci-pci.c
View File

@ -501,6 +501,7 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
{
struct sdhci_pci_chip *chip;
struct sdhci_pci_slot *slot;
mmc_pm_flag_t pm_flags = 0;
int i, ret;
chip = pci_get_drvdata(pdev);
@ -519,6 +520,8 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
sdhci_resume_host(chip->slots[i]->host);
return ret;
}
pm_flags |= slot->host->mmc->pm_flags;
}
if (chip->fixes && chip->fixes->suspend) {
@ -531,9 +534,15 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
}
pci_save_state(pdev);
pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
pci_disable_device(pdev);
pci_set_power_state(pdev, pci_choose_state(pdev, state));
if (pm_flags & MMC_PM_KEEP_POWER) {
if (pm_flags & MMC_PM_WAKE_SDIO_IRQ)
pci_enable_wake(pdev, PCI_D3hot, 1);
pci_set_power_state(pdev, PCI_D3hot);
} else {
pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
pci_disable_device(pdev);
pci_set_power_state(pdev, pci_choose_state(pdev, state));
}
return 0;
}
@ -653,6 +662,8 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
goto unmap;
}
host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
ret = sdhci_add_host(host);
if (ret)
goto remove;

26
drivers/mmc/host/sdhci.c
View File

@ -174,20 +174,31 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier);
}
static void sdhci_init(struct sdhci_host *host)
static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
static void sdhci_init(struct sdhci_host *host, int soft)
{
sdhci_reset(host, SDHCI_RESET_ALL);
if (soft)
sdhci_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA);
else
sdhci_reset(host, SDHCI_RESET_ALL);
sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK,
SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE);
if (soft) {
/* force clock reconfiguration */
host->clock = 0;
sdhci_set_ios(host->mmc, &host->mmc->ios);
}
}
static void sdhci_reinit(struct sdhci_host *host)
{
sdhci_init(host);
sdhci_init(host, 0);
sdhci_enable_card_detection(host);
}
@ -1600,16 +1611,13 @@ int sdhci_resume_host(struct sdhci_host *host)
if (ret)
return ret;
sdhci_init(host);
sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER));
mmiowb();
ret = mmc_resume_host(host->mmc);
if (ret)
return ret;
sdhci_enable_card_detection(host);
return 0;
return ret;
}
EXPORT_SYMBOL_GPL(sdhci_resume_host);
@ -1864,7 +1872,7 @@ int sdhci_add_host(struct sdhci_host *host)
if (ret)
goto untasklet;
sdhci_init(host);
sdhci_init(host, 0);
#ifdef CONFIG_MMC_DEBUG
sdhci_dumpregs(host);