The patch titled
sdio: sdhci support for suspend mode PM features
has been added to the -mm tree. Its filename is
sdio-sdhci-support-for-suspend-mode-pm-features.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: sdio: sdhci support for suspend mode PM features
From: Nicolas Pitre <[email protected]>
Tested with an XO v1.5 from OLPC.
Signed-off-by: Nicolas Pitre <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
drivers/mmc/host/sdhci-pci.c | 17 ++++++++++++++---
drivers/mmc/host/sdhci.c | 26 +++++++++++++++++---------
2 files changed, 31 insertions(+), 12 deletions(-)
diff -puN
drivers/mmc/host/sdhci-pci.c~sdio-sdhci-support-for-suspend-mode-pm-features
drivers/mmc/host/sdhci-pci.c
---
a/drivers/mmc/host/sdhci-pci.c~sdio-sdhci-support-for-suspend-mode-pm-features
+++ a/drivers/mmc/host/sdhci-pci.c
@@ -501,6 +501,7 @@ static int sdhci_pci_suspend (struct pci
{
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
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
}
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
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 -puN
drivers/mmc/host/sdhci.c~sdio-sdhci-support-for-suspend-mode-pm-features
drivers/mmc/host/sdhci.c
--- a/drivers/mmc/host/sdhci.c~sdio-sdhci-support-for-suspend-mode-pm-features
+++ a/drivers/mmc/host/sdhci.c
@@ -174,20 +174,31 @@ static void sdhci_reset(struct sdhci_hos
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
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 *ho
if (ret)
goto untasklet;
- sdhci_init(host);
+ sdhci_init(host, 0);
#ifdef CONFIG_MMC_DEBUG
sdhci_dumpregs(host);
_
Patches currently in -mm which might be from [email protected] are
mmc-fix-hang-if-card-was-removed-during-suspend-and-unsafe-resume-was-enabled.patch
sdio-introduce-api-for-special-power-management-features.patch
sdio-sdhci-support-for-suspend-mode-pm-features.patch
sdio-kick-the-interrupt-thread-upon-a-resume.patch
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