Merge branch 'drm-tda998x-3.12-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-cubox...

[~andy/linux] / drivers / mmc / core / mmc.c

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 0d060227cfc1bab543f32fdc78f5d6809f4b5315..f631f5a9bf7948b848754cc3ba475619c957a79b 100644 (file)
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -13,6 +13,7 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/stat.h>
+#include <linux/pm_runtime.h>
 
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
@@ -1478,6 +1479,9 @@ static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
 
        mmc_claim_host(host);
 
+       if (mmc_card_suspended(host->card))
+               goto out;
+
        if (mmc_card_doing_bkops(host->card)) {
                err = mmc_stop_bkops(host->card);
                if (err)
@@ -1497,50 +1501,93 @@ static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
                err = mmc_deselect_cards(host);
        host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
 
-       if (!err)
+       if (!err) {
                mmc_power_off(host);
+               mmc_card_set_suspended(host->card);
+       }
 out:
        mmc_release_host(host);
        return err;
 }
 
 /*
- * Suspend callback from host.
+ * Suspend callback
  */
 static int mmc_suspend(struct mmc_host *host)
 {
-       return _mmc_suspend(host, true);
-}
+       int err;
 
-/*
- * Shutdown callback
- */
-static int mmc_shutdown(struct mmc_host *host)
-{
-       return _mmc_suspend(host, false);
+       err = _mmc_suspend(host, true);
+       if (!err) {
+               pm_runtime_disable(&host->card->dev);
+               pm_runtime_set_suspended(&host->card->dev);
+       }
+
+       return err;
 }
 
 /*
- * Resume callback from host.
- *
  * This function tries to determine if the same card is still present
  * and, if so, restore all state to it.
  */
-static int mmc_resume(struct mmc_host *host)
+static int _mmc_resume(struct mmc_host *host)
 {
-       int err;
+       int err = 0;
 
        BUG_ON(!host);
        BUG_ON(!host->card);
 
        mmc_claim_host(host);
+
+       if (!mmc_card_suspended(host->card))
+               goto out;
+
        mmc_power_up(host, host->card->ocr);
        err = mmc_init_card(host, host->card->ocr, host->card);
+       mmc_card_clr_suspended(host->card);
+
+out:
        mmc_release_host(host);
+       return err;
+}
+
+/*
+ * Shutdown callback
+ */
+static int mmc_shutdown(struct mmc_host *host)
+{
+       int err = 0;
+
+       /*
+        * In a specific case for poweroff notify, we need to resume the card
+        * before we can shutdown it properly.
+        */
+       if (mmc_can_poweroff_notify(host->card) &&
+               !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
+               err = _mmc_resume(host);
+
+       if (!err)
+               err = _mmc_suspend(host, false);
 
        return err;
 }
 
+/*
+ * Callback for resume.
+ */
+static int mmc_resume(struct mmc_host *host)
+{
+       int err = 0;
+
+       if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
+               err = _mmc_resume(host);
+               pm_runtime_set_active(&host->card->dev);
+               pm_runtime_mark_last_busy(&host->card->dev);
+       }
+       pm_runtime_enable(&host->card->dev);
+
+       return err;
+}
 
 /*
  * Callback for runtime_suspend.
@@ -1552,18 +1599,11 @@ static int mmc_runtime_suspend(struct mmc_host *host)
        if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
                return 0;
 
-       mmc_claim_host(host);
-
-       err = mmc_suspend(host);
-       if (err) {
+       err = _mmc_suspend(host, true);
+       if (err)
                pr_err("%s: error %d doing aggessive suspend\n",
                        mmc_hostname(host), err);
-               goto out;
-       }
-       mmc_power_off(host);
 
-out:
-       mmc_release_host(host);
        return err;
 }
 
@@ -1574,18 +1614,14 @@ static int mmc_runtime_resume(struct mmc_host *host)
 {
        int err;
 
-       if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
+       if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
                return 0;
 
-       mmc_claim_host(host);
-
-       mmc_power_up(host, host->card->ocr);
-       err = mmc_resume(host);
+       err = _mmc_resume(host);
        if (err)
                pr_err("%s: error %d doing aggessive resume\n",
                        mmc_hostname(host), err);
 
-       mmc_release_host(host);
        return 0;
 }