Merge remote-tracking branch 'remotes/aosp/android-3.0' into develop-3.0

[firefly-linux-kernel-4.4.55.git] / drivers / mmc / core / core.c

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b453ecc9710b120f4477a9365dc3cd1e439aedae..4850f34577ff7c521d1f6f415a9af33b9ddb3bc9 100755 (executable)
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -40,7 +40,6 @@
 #include "sdio_ops.h"
 
 static struct workqueue_struct *workqueue;
-static struct wake_lock mmc_delayed_work_wake_lock;
 
 /*
  * Enabling software CRCs on the data blocks can be a significant (30%)
@@ -73,7 +72,6 @@ MODULE_PARM_DESC(
 static int mmc_schedule_delayed_work(struct delayed_work *work,
                                     unsigned long delay)
 {
-       wake_lock(&mmc_delayed_work_wake_lock);
        return queue_delayed_work(workqueue, work, delay);
 }
 
@@ -135,7 +133,7 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
                if (mrq->done)
                        mrq->done(mrq);
 
-               mmc_host_clk_gate(host);
+               mmc_host_clk_release(host);
        }
 }
 
@@ -194,7 +192,7 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
                        mrq->stop->mrq = mrq;
                }
        }
-       mmc_host_clk_ungate(host);
+       mmc_host_clk_hold(host);
        led_trigger_event(host->led, LED_FULL);
        host->ops->request(host, mrq);
 }
@@ -602,12 +600,9 @@ void mmc_host_deeper_disable(struct work_struct *work)
 
        /* If the host is claimed then we do not want to disable it anymore */
        if (!mmc_try_claim_host(host))
-               goto out;
+               return;
        mmc_host_do_disable(host, 1);
        mmc_do_release_host(host);
-
-out:
-       wake_unlock(&mmc_delayed_work_wake_lock);
 }
 
 /**
@@ -683,15 +678,17 @@ static inline void mmc_set_ios(struct mmc_host *host)
  */
 void mmc_set_chip_select(struct mmc_host *host, int mode)
 {
+       mmc_host_clk_hold(host);
        host->ios.chip_select = mode;
        mmc_set_ios(host);
+       mmc_host_clk_release(host);
 }
 
 /*
  * Sets the host clock to the highest possible frequency that
  * is below "hz".
  */
-void mmc_set_clock(struct mmc_host *host, unsigned int hz)
+static void __mmc_set_clock(struct mmc_host *host, unsigned int hz)
 {
        WARN_ON(hz < host->f_min);
 
@@ -702,6 +699,13 @@ void mmc_set_clock(struct mmc_host *host, unsigned int hz)
        mmc_set_ios(host);
 }
 
+void mmc_set_clock(struct mmc_host *host, unsigned int hz)
+{
+       mmc_host_clk_hold(host);
+       __mmc_set_clock(host, hz);
+       mmc_host_clk_release(host);
+}
+
 #ifdef CONFIG_MMC_CLKGATE
 /*
  * This gates the clock by setting it to 0 Hz.
@@ -734,7 +738,7 @@ void mmc_ungate_clock(struct mmc_host *host)
        if (host->clk_old) {
                BUG_ON(host->ios.clock);
                /* This call will also set host->clk_gated to false */
-               mmc_set_clock(host, host->clk_old);
+               __mmc_set_clock(host, host->clk_old);
        }
 }
 
@@ -762,8 +766,10 @@ void mmc_set_ungated(struct mmc_host *host)
  */
 void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
 {
+       mmc_host_clk_hold(host);
        host->ios.bus_mode = mode;
        mmc_set_ios(host);
+       mmc_host_clk_release(host);
 }
 
 /*
@@ -771,8 +777,10 @@ void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
  */
 void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
 {
+       mmc_host_clk_hold(host);
        host->ios.bus_width = width;
        mmc_set_ios(host);
+       mmc_host_clk_release(host);
 }
 
 /**
@@ -970,8 +978,10 @@ u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
 
                ocr &= 3 << bit;
 
+               mmc_host_clk_hold(host);
                host->ios.vdd = bit;
                mmc_set_ios(host);
+               mmc_host_clk_release(host);
        } else {
                pr_warning("%s: host doesn't support card's voltages\n",
                                mmc_hostname(host));
@@ -1018,8 +1028,10 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, bool cmd11
  */
 void mmc_set_timing(struct mmc_host *host, unsigned int timing)
 {
+       mmc_host_clk_hold(host);
        host->ios.timing = timing;
        mmc_set_ios(host);
+       mmc_host_clk_release(host);
 }
 
 /*
@@ -1027,8 +1039,10 @@ void mmc_set_timing(struct mmc_host *host, unsigned int timing)
  */
 void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
 {
+       mmc_host_clk_hold(host);
        host->ios.drv_type = drv_type;
        mmc_set_ios(host);
+       mmc_host_clk_release(host);
 }
 
 /*
@@ -1046,6 +1060,8 @@ static void mmc_power_up(struct mmc_host *host)
 {
        int bit;
 
+       mmc_host_clk_hold(host);
+
        /* If ocr is set, we use it */
        if (host->ocr)
                bit = ffs(host->ocr) - 1;
@@ -1081,10 +1097,14 @@ static void mmc_power_up(struct mmc_host *host)
         * time required to reach a stable voltage.
         */
        mmc_delay(10);
+
+       mmc_host_clk_release(host);
 }
 
 static void mmc_power_off(struct mmc_host *host)
 {
+       mmc_host_clk_hold(host);
+
        host->ios.clock = 0;
        host->ios.vdd = 0;
 
@@ -1102,6 +1122,8 @@ static void mmc_power_off(struct mmc_host *host)
        host->ios.bus_width = MMC_BUS_WIDTH_1;
        host->ios.timing = MMC_TIMING_LEGACY;
        mmc_set_ios(host);
+
+       mmc_host_clk_release(host);
 }
 
 /*
@@ -1241,6 +1263,7 @@ void mmc_detect_change(struct mmc_host *host, unsigned long delay)
        spin_unlock_irqrestore(&host->lock, flags);
 #endif
 
+       wake_lock(&host->detect_wake_lock);
        mmc_schedule_delayed_work(&host->detect, delay);
 }
 
@@ -1703,11 +1726,13 @@ void mmc_rescan(struct work_struct *work)
 
  out:
        if (extend_wakelock)
-               wake_lock_timeout(&mmc_delayed_work_wake_lock, HZ / 2);
+               wake_lock_timeout(&host->detect_wake_lock, HZ / 2);
        else
-               wake_unlock(&mmc_delayed_work_wake_lock);
-       if (host->caps & MMC_CAP_NEEDS_POLL)
+               wake_unlock(&host->detect_wake_lock);
+       if (host->caps & MMC_CAP_NEEDS_POLL) {
+               wake_lock(&host->detect_wake_lock);
                mmc_schedule_delayed_work(&host->detect, HZ);
+       }
 }
 
 void mmc_start_host(struct mmc_host *host)
@@ -1727,7 +1752,8 @@ void mmc_stop_host(struct mmc_host *host)
 
        if (host->caps & MMC_CAP_DISABLE)
                cancel_delayed_work(&host->disable);
-       cancel_delayed_work_sync(&host->detect);
+       if (cancel_delayed_work_sync(&host->detect))
+               wake_unlock(&host->detect_wake_lock);
        mmc_flush_scheduled_work();
 
        /* clear pm flags now and let card drivers set them as needed */
@@ -1848,7 +1874,8 @@ int mmc_suspend_host(struct mmc_host *host)
 
        if (host->caps & MMC_CAP_DISABLE)
                cancel_delayed_work(&host->disable);
-       cancel_delayed_work(&host->detect);
+       if (cancel_delayed_work(&host->detect))
+               wake_unlock(&host->detect_wake_lock);
        mmc_flush_scheduled_work();
 
        mmc_bus_get(host);
@@ -1956,7 +1983,8 @@ int mmc_pm_notify(struct notifier_block *notify_block,
                }
                host->rescan_disable = 1;
                spin_unlock_irqrestore(&host->lock, flags);
-               cancel_delayed_work_sync(&host->detect);
+               if (cancel_delayed_work_sync(&host->detect))
+                       wake_unlock(&host->detect_wake_lock);
 
                if (!host->bus_ops || host->bus_ops->suspend)
                        break;
@@ -2014,9 +2042,6 @@ static int __init mmc_init(void)
        if (!workqueue)
                return -ENOMEM;
 
-       wake_lock_init(&mmc_delayed_work_wake_lock, WAKE_LOCK_SUSPEND,
-                      "mmc_delayed_work");
-
        ret = mmc_register_bus();
        if (ret)
                goto destroy_workqueue;
@@ -2037,7 +2062,6 @@ unregister_bus:
        mmc_unregister_bus();
 destroy_workqueue:
        destroy_workqueue(workqueue);
-       wake_lock_destroy(&mmc_delayed_work_wake_lock);
 
        return ret;
 }
@@ -2048,7 +2072,6 @@ static void __exit mmc_exit(void)
        mmc_unregister_host_class();
        mmc_unregister_bus();
        destroy_workqueue(workqueue);
-       wake_lock_destroy(&mmc_delayed_work_wake_lock);
 }
 
 subsys_initcall(mmc_init);