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authorNicolas Pitre <nico@fluxnic.net>2010-03-05 13:43:32 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-06 11:26:37 -0800
commit2f4cbb3d834922ffa0309b6a08fa42dac87ef9d2 (patch)
tree9c4b919b3851d3e0c066ba5c456bf0d2c150da4f /drivers/mmc/host
parentda68c4eb258cd9f3f0b8aeb7e46b8118bb6358b6 (diff)
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>
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/sdhci-pci.c17
-rw-r--r--drivers/mmc/host/sdhci.c26
2 files changed, 31 insertions, 12 deletions
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 5c3a1767770..dbf054315fe 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -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;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 6c866b43b03..d6ab62d539f 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -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);