mmc: add mmc card sleep and awake support
[linux-2.6.git] / drivers / mmc / core / core.c
index be1fc01..828e60e 100644 (file)
@@ -1185,6 +1185,46 @@ void mmc_power_restore_host(struct mmc_host *host)
 }
 EXPORT_SYMBOL(mmc_power_restore_host);
 
+int mmc_card_awake(struct mmc_host *host)
+{
+       int err = -ENOSYS;
+
+       mmc_bus_get(host);
+
+       if (host->bus_ops && !host->bus_dead && host->bus_ops->awake)
+               err = host->bus_ops->awake(host);
+
+       mmc_bus_put(host);
+
+       return err;
+}
+EXPORT_SYMBOL(mmc_card_awake);
+
+int mmc_card_sleep(struct mmc_host *host)
+{
+       int err = -ENOSYS;
+
+       mmc_bus_get(host);
+
+       if (host->bus_ops && !host->bus_dead && host->bus_ops->awake)
+               err = host->bus_ops->sleep(host);
+
+       mmc_bus_put(host);
+
+       return err;
+}
+EXPORT_SYMBOL(mmc_card_sleep);
+
+int mmc_card_can_sleep(struct mmc_host *host)
+{
+       struct mmc_card *card = host->card;
+
+       if (card && mmc_card_mmc(card) && card->ext_csd.rev >= 3)
+               return 1;
+       return 0;
+}
+EXPORT_SYMBOL(mmc_card_can_sleep);
+
 #ifdef CONFIG_PM
 
 /**