| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20110114082318.GC27523@intel.com>
Date: Fri, 14 Jan 2011 16:23:18 +0800
From: Chuanxiao Dong <chuanxiao.dong@...el.com>
To: linux-mmc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, cjb@...top.org, ohad@...ery.com
Subject: [PATCH v1 2/3]mmc: implemented SDHCI host controller driver
runtime pm
add runtime power managment for sdhci pci host
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@...el.com>
---
drivers/mmc/host/sdhci-pci.c | 104 ++++++++++++++++++++++++++++++++++++++++++
drivers/mmc/host/sdhci.c | 39 ++++++++++++++++
drivers/mmc/host/sdhci.h | 5 ++
3 files changed, 148 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 0dc905b..c2c4e97 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -18,6 +18,7 @@
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/device.h>
+#include <linux/pm_runtime.h>
#include <linux/mmc/host.h>
@@ -1083,6 +1084,10 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
chip->slots[i] = slot;
}
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_allow(&pdev->dev);
+
return 0;
free:
@@ -1099,6 +1104,8 @@ static void __devexit sdhci_pci_remove(struct pci_dev *pdev)
int i;
struct sdhci_pci_chip *chip;
+ pm_runtime_get_sync(&pdev->dev);
+
chip = pci_get_drvdata(pdev);
if (chip) {
@@ -1110,8 +1117,102 @@ static void __devexit sdhci_pci_remove(struct pci_dev *pdev)
}
pci_disable_device(pdev);
+
+ pm_runtime_put_noidle(&pdev->dev);
+ pm_runtime_forbid(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int sdhci_pci_runtime_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
+ struct sdhci_pci_chip *chip;
+ struct sdhci_pci_slot *slot;
+ int i, ret;
+ mmc_pm_flag_t pm_flags = 0;
+ pm_message_t state;
+
+ chip = pci_get_drvdata(pdev);
+ if (!chip)
+ return 0;
+
+ for (i = 0; i < chip->num_slots; i++) {
+ slot = chip->slots[i];
+ if (!slot)
+ continue;
+
+ ret = sdhci_runtime_suspend(slot->host);
+
+ if (ret) {
+ for (i--; i >= 0; i--)
+ sdhci_runtime_resume(chip->slots[i]->host);
+ return ret;
+ }
+
+ pm_flags |= slot->host->mmc->pm_flags;
+ }
+
+ state.event = PM_EVENT_AUTO_SUSPEND;
+ if (chip->fixes && chip->fixes->suspend) {
+ ret = chip->fixes->suspend(chip, state);
+ if (ret) {
+ for (i = chip->num_slots - 1; i >= 0; i--)
+ sdhci_runtime_resume(chip->slots[i]->host);
+ return ret;
+ }
+ }
+
+ return 0;
}
+static int sdhci_pci_runtime_resume(struct device *dev)
+{
+ struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
+ struct sdhci_pci_chip *chip;
+ struct sdhci_pci_slot *slot;
+ int i, ret;
+
+ chip = pci_get_drvdata(pdev);
+ if (!chip)
+ return 0;
+
+ if (chip->fixes && chip->fixes->resume) {
+ ret = chip->fixes->resume(chip);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < chip->num_slots; i++) {
+ slot = chip->slots[i];
+ if (!slot)
+ continue;
+
+ ret = sdhci_runtime_resume(slot->host);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int sdhci_pci_runtime_idle(struct device *dev)
+{
+ return 0;
+}
+
+#else
+#define sdhci_pci_runtime_suspend NULL
+#define sdhci_pci_runtime_resume NULL
+#define sdhci_pci_runtime_idle NULL
+#endif
+
+static const struct dev_pm_ops sdhci_pci_pm_ops = {
+ .runtime_suspend = sdhci_pci_runtime_suspend,
+ .runtime_resume = sdhci_pci_runtime_resume,
+ .runtime_idle = sdhci_pci_runtime_idle,
+};
+
static struct pci_driver sdhci_driver = {
.name = "sdhci-pci",
.id_table = pci_ids,
@@ -1119,6 +1220,9 @@ static struct pci_driver sdhci_driver = {
.remove = __devexit_p(sdhci_pci_remove),
.suspend = sdhci_pci_suspend,
.resume = sdhci_pci_resume,
+ .driver = {
+ .pm = &sdhci_pci_pm_ops
+ },
};
/*****************************************************************************\
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 9e15f41..89464bd 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1715,6 +1715,45 @@ EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups);
#endif /* CONFIG_PM */
+#ifdef CONFIG_PM_RUNTIME
+int sdhci_runtime_suspend(struct sdhci_host *host)
+{
+ int ret = 0;
+
+ if (host->vmmc)
+ ret = regulator_disable(host->vmmc);
+
+ host->clock = 0;
+ host->pwr = 0;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sdhci_runtime_suspend);
+
+int sdhci_runtime_resume(struct sdhci_host *host)
+{
+ int ret = 0;
+
+ if (host->vmmc) {
+ int ret = regulator_enable(host->vmmc);
+ if (ret)
+ return ret;
+ }
+
+ if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
+ if (host->ops->enable_dma)
+ host->ops->enable_dma(host);
+ }
+
+ sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER));
+ sdhci_set_ios(host->mmc, &host->mmc->ios);
+ mmiowb();
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sdhci_runtime_resume);
+#endif /* CONFIG_PM_RUNTIME */
+
/*****************************************************************************\
* *
* Device allocation/registration *
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 6e0969e..1f032c0 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -327,4 +327,9 @@ extern int sdhci_resume_host(struct sdhci_host *host);
extern void sdhci_enable_irq_wakeups(struct sdhci_host *host);
#endif
+#ifdef CONFIG_PM_RUNTIME
+extern int sdhci_runtime_suspend(struct sdhci_host *host);
+extern int sdhci_runtime_resume(struct sdhci_host *host);
+#endif
+
#endif /* __SDHCI_HW_H */
--
1.6.6.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists