mmc: fixes for eMMC v4.5 discard operation

[pandora-kernel.git] / drivers / mmc / core / core.c

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 5278ffb..c420a9e 100644 (file)
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -529,6 +529,18 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
                        data->timeout_clks = 0;
                }
        }
+
+       /*
+        * Some cards require longer data read timeout than indicated in CSD.
+        * Address this by setting the read timeout to a "reasonably high"
+        * value. For the cards tested, 300ms has proven enough. If necessary,
+        * this value can be increased if other problematic cards require this.
+        */
+       if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) {
+               data->timeout_ns = 300000000;
+               data->timeout_clks = 0;
+       }
+
        /*
         * Some cards need very high timeouts if driven in SPI mode.
         * The worst observed timeout was 900ms after writing a
@@ -1213,6 +1225,46 @@ void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
        mmc_host_clk_release(host);
 }
 
+static void mmc_poweroff_notify(struct mmc_host *host)
+{
+       struct mmc_card *card;
+       unsigned int timeout;
+       unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION;
+       int err = 0;
+
+       card = host->card;
+
+       /*
+        * Send power notify command only if card
+        * is mmc and notify state is powered ON
+        */
+       if (card && mmc_card_mmc(card) &&
+           (card->poweroff_notify_state == MMC_POWERED_ON)) {
+
+               if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) {
+                       notify_type = EXT_CSD_POWER_OFF_SHORT;
+                       timeout = card->ext_csd.generic_cmd6_time;
+                       card->poweroff_notify_state = MMC_POWEROFF_SHORT;
+               } else {
+                       notify_type = EXT_CSD_POWER_OFF_LONG;
+                       timeout = card->ext_csd.power_off_longtime;
+                       card->poweroff_notify_state = MMC_POWEROFF_LONG;
+               }
+
+               err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+                                EXT_CSD_POWER_OFF_NOTIFICATION,
+                                notify_type, timeout);
+
+               if (err && err != -EBADMSG)
+                       pr_err("Device failed to respond within %d poweroff "
+                              "time. Forcefully powering down the device\n",
+                              timeout);
+
+               /* Set the card state to no notification after the poweroff */
+               card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION;
+       }
+}
+
 /*
  * Apply power to the MMC stack.  This is a two-stage process.
  * First, we enable power to the card without the clock running.
@@ -1269,42 +1321,12 @@ static void mmc_power_up(struct mmc_host *host)
 
 void mmc_power_off(struct mmc_host *host)
 {
-       struct mmc_card *card;
-       unsigned int notify_type;
-       unsigned int timeout;
-       int err;
-
        mmc_host_clk_hold(host);
 
-       card = host->card;
        host->ios.clock = 0;
        host->ios.vdd = 0;
 
-       if (card && mmc_card_mmc(card) &&
-           (card->poweroff_notify_state == MMC_POWERED_ON)) {
-
-               if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) {
-                       notify_type = EXT_CSD_POWER_OFF_SHORT;
-                       timeout = card->ext_csd.generic_cmd6_time;
-                       card->poweroff_notify_state = MMC_POWEROFF_SHORT;
-               } else {
-                       notify_type = EXT_CSD_POWER_OFF_LONG;
-                       timeout = card->ext_csd.power_off_longtime;
-                       card->poweroff_notify_state = MMC_POWEROFF_LONG;
-               }
-
-               err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-                                EXT_CSD_POWER_OFF_NOTIFICATION,
-                                notify_type, timeout);
-
-               if (err && err != -EBADMSG)
-                       pr_err("Device failed to respond within %d poweroff "
-                              "time. Forcefully powering down the device\n",
-                              timeout);
-
-               /* Set the card state to no notification after the poweroff */
-               card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION;
-       }
+       mmc_poweroff_notify(host);
 
        /*
         * Reset ocr mask to be the highest possible voltage supported for
@@ -1494,7 +1516,10 @@ static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
 {
        unsigned int erase_timeout;
 
-       if (card->ext_csd.erase_group_def & 1) {
+       if (arg == MMC_DISCARD_ARG ||
+           (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) {
+               erase_timeout = card->ext_csd.trim_timeout;
+       } else if (card->ext_csd.erase_group_def & 1) {
                /* High Capacity Erase Group Size uses HC timeouts */
                if (arg == MMC_TRIM_ARG)
                        erase_timeout = card->ext_csd.trim_timeout;
@@ -1766,8 +1791,6 @@ int mmc_can_trim(struct mmc_card *card)
 {
        if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)
                return 1;
-       if (mmc_can_discard(card))
-               return 1;
        return 0;
 }
 EXPORT_SYMBOL(mmc_can_trim);
@@ -2196,7 +2219,7 @@ int mmc_card_sleep(struct mmc_host *host)
 
        mmc_bus_get(host);
 
-       if (host->bus_ops && !host->bus_dead && host->bus_ops->awake)
+       if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep)
                err = host->bus_ops->sleep(host);
 
        mmc_bus_put(host);
@@ -2302,8 +2325,17 @@ int mmc_suspend_host(struct mmc_host *host)
                 * pre-claim the host.
                 */
                if (mmc_try_claim_host(host)) {
-                       if (host->bus_ops->suspend)
+                       if (host->bus_ops->suspend) {
+                               /*
+                                * For eMMC 4.5 device send notify command
+                                * before sleep, because in sleep state eMMC 4.5
+                                * devices respond to only RESET and AWAKE cmd
+                                */
+                               mmc_poweroff_notify(host);
                                err = host->bus_ops->suspend(host);
+                       }
+                       mmc_do_release_host(host);
+
                        if (err == -ENOSYS || !host->bus_ops->resume) {
                                /*
                                 * We simply "remove" the card in this case.
@@ -2318,7 +2350,6 @@ int mmc_suspend_host(struct mmc_host *host)
                                host->pm_flags = 0;
                                err = 0;
                        }
-                       mmc_do_release_host(host);
                } else {
                        err = -EBUSY;
                }