Revert "MMC-4.5 Power OFF Notify Rework"
The version of PON support accepted by the linux community is
slightly different from the one that was merged. This revert is needed
in order to upload the latest version from the linux community.
This reverts commit 76058d7388c6edde07fd6289ce082dc1a1813b26.
(cherry picked from commit 8b458cf768db937d3a2274e216819a1a217e97f8)
Change-Id: I0cb611698b25de600dbaa54678edae661456e485
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
(cherry picked from commit 6e3e74d3ba5c825108b0a63018376b12e61592f9)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index e2347af..cfb3a4a 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1438,6 +1438,49 @@
mmc_set_ios(host);
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;
+ mmc_claim_host(host);
+
+ /*
+ * 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.",
+ timeout);
+ pr_err("Forcefully powering down the device\n");
+
+ /* Set the card state to no notification after the poweroff */
+ card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION;
+ }
+ mmc_release_host(host);
+}
+
/*
* Apply power to the MMC stack. This is a two-stage process.
* First, we enable power to the card without the clock running.
@@ -1495,11 +1538,29 @@
void mmc_power_off(struct mmc_host *host)
{
+ int err = 0;
mmc_host_clk_hold(host);
host->ios.clock = 0;
host->ios.vdd = 0;
+ mmc_poweroff_notify(host);
+ /*
+ * For eMMC 4.5 device send AWAKE command before
+ * POWER_OFF_NOTIFY command, because in sleep state
+ * eMMC 4.5 devices respond to only RESET and AWAKE cmd
+ */
+ if (host->card && mmc_card_is_sleep(host->card) &&
+ host->bus_ops->resume) {
+ err = host->bus_ops->resume(host);
+
+ if (!err)
+ mmc_poweroff_notify(host);
+ else
+ pr_warning("%s: error %d during resume",
+ mmc_hostname(host), err);
+ pr_warning(" (continue with poweroff sequence)\n");
+ }
/*
* Reset ocr mask to be the highest possible voltage supported for
@@ -2030,15 +2091,6 @@
}
EXPORT_SYMBOL(mmc_can_secure_erase_trim);
-int mmc_can_poweroff_notify(const struct mmc_card *card)
-{
- return card &&
- mmc_card_mmc(card) &&
- card->host->bus_ops->poweroff_notify &&
- (card->poweroff_notify_state == MMC_POWERED_ON);
-}
-EXPORT_SYMBOL(mmc_can_poweroff_notify);
-
int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
unsigned int nr)
{
@@ -2431,15 +2483,6 @@
mmc_bus_get(host);
if (host->bus_ops && !host->bus_dead) {
- mmc_claim_host(host);
- if (mmc_can_poweroff_notify(host->card)) {
- int err = host->bus_ops->poweroff_notify(host,
- MMC_PW_OFF_NOTIFY_LONG);
- if (err)
- pr_info("%s: error [%d] in poweroff notify\n",
- mmc_hostname(host), err);
- }
- mmc_release_host(host);
/* Calling bus_ops->remove() with a claimed host can deadlock */
if (host->bus_ops->remove)
host->bus_ops->remove(host);
@@ -2475,15 +2518,6 @@
if (host->bus_ops->power_save)
ret = host->bus_ops->power_save(host);
- mmc_claim_host(host);
- if (mmc_can_poweroff_notify(host->card)) {
- int err = host->bus_ops->poweroff_notify(host,
- MMC_PW_OFF_NOTIFY_SHORT);
- if (err)
- pr_info("%s: error [%d] in poweroff notify\n",
- mmc_hostname(host), err);
- }
- mmc_release_host(host);
mmc_bus_put(host);
@@ -2526,11 +2560,8 @@
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->awake)
err = host->bus_ops->awake(host);
- if (!err)
- mmc_card_clr_sleep(host->card);
- }
mmc_bus_put(host);
@@ -2547,11 +2578,8 @@
mmc_bus_get(host);
- if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep) {
+ if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep)
err = host->bus_ops->sleep(host);
- if (!err)
- mmc_card_set_sleep(host->card);
- }
mmc_bus_put(host);
@@ -2797,21 +2825,13 @@
break;
}
host->rescan_disable = 1;
+ host->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
spin_unlock_irqrestore(&host->lock, flags);
if (cancel_delayed_work_sync(&host->detect))
wake_unlock(&host->detect_wake_lock);
if (!host->bus_ops || host->bus_ops->suspend)
break;
- mmc_claim_host(host);
- if (mmc_can_poweroff_notify(host->card)) {
- int err = host->bus_ops->poweroff_notify(host,
- MMC_PW_OFF_NOTIFY_SHORT);
- if (err)
- pr_info("%s: error [%d] in poweroff notify\n",
- mmc_hostname(host), err);
- }
- mmc_release_host(host);
/* Calling bus_ops->remove() with a claimed host can deadlock */
if (host->bus_ops->remove)
@@ -2834,6 +2854,7 @@
break;
}
host->rescan_disable = 0;
+ host->power_notify_type = MMC_HOST_PW_NOTIFY_LONG;
spin_unlock_irqrestore(&host->lock, flags);
mmc_detect_change(host, 0);
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 22f6043..85d2737 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -25,7 +25,6 @@
int (*power_save)(struct mmc_host *);
int (*power_restore)(struct mmc_host *);
int (*alive)(struct mmc_host *);
- int (*poweroff_notify)(struct mmc_host *, int notify);
};
void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index ca8b01c..50af7fa 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1356,40 +1356,6 @@
return err;
}
-static int mmc_poweroff_notify(struct mmc_host *host, int notify)
-{
- struct mmc_card *card;
- unsigned int timeout;
- unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION;
- int err;
-
- card = host->card;
-
- if (notify == MMC_PW_OFF_NOTIFY_SHORT) {
- notify_type = EXT_CSD_POWER_OFF_SHORT;
- timeout = card->ext_csd.generic_cmd6_time;
- } else if (notify == MMC_PW_OFF_NOTIFY_LONG) {
- notify_type = EXT_CSD_POWER_OFF_LONG;
- timeout = card->ext_csd.power_off_longtime;
- } else {
- pr_info("%s: mmc_poweroff_notify called "
- "with notify type %d\n", mmc_hostname(host), notify);
- return -EINVAL;
- }
-
- err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- EXT_CSD_POWER_OFF_NOTIFICATION,
- notify_type, timeout);
-
- if (err)
- pr_err("%s: Device failed to respond within %d "
- "poweroff timeout.\n", mmc_hostname(host), timeout);
- else
- card->poweroff_notify_state =
- MMC_NO_POWER_NOTIFICATION;
-
- return err;
-}
/*
* Host is being removed. Free up the current card.
*/
@@ -1453,26 +1419,13 @@
BUG_ON(!host->card);
mmc_claim_host(host);
- if (mmc_can_poweroff_notify(host->card) &&
- (host->caps2 & MMC_CAP2_POWER_OFF_VCCQ_DURING_SUSPEND)) {
- err = mmc_poweroff_notify(host, MMC_PW_OFF_NOTIFY_SHORT);
- } else {
- if (mmc_card_can_sleep(host))
- /*
- * If sleep command has error it doesn't mean host
- * cannot suspend, but a deeper low power state
- * transition for the card has failed. Ignore
- * sleep errors so that the suspend is not aborted.
- * In error case, mmc_resume() takes care of
- * complete intialization of the card.
- */
- mmc_card_sleep(host);
- else if (!mmc_host_is_spi(host))
- mmc_deselect_cards(host);
- }
- if (!err)
- host->card->state &=
- ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
+ if (mmc_card_can_sleep(host)) {
+ err = mmc_card_sleep(host);
+ if (!err)
+ mmc_card_set_sleep(host->card);
+ } else if (!mmc_host_is_spi(host))
+ mmc_deselect_cards(host);
+ host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
mmc_release_host(host);
return err;
@@ -1550,7 +1503,6 @@
.resume = NULL,
.power_restore = mmc_power_restore,
.alive = mmc_alive,
- .poweroff_notify = mmc_poweroff_notify,
};
static const struct mmc_bus_ops mmc_ops_unsafe = {
@@ -1562,7 +1514,6 @@
.resume = mmc_resume,
.power_restore = mmc_power_restore,
.alive = mmc_alive,
- .poweroff_notify = mmc_poweroff_notify,
};
static void mmc_attach_bus_ops(struct mmc_host *host)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index bd374f6..ab3fc46 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1790,6 +1790,11 @@
if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED)
mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
+ if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY)
+ mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
+ else
+ mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE;
+
if (host->pdata->blk_settings) {
mmc->max_segs = host->pdata->blk_settings->max_segs;
mmc->max_blk_size = host->pdata->blk_settings->max_blk_size;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 2f1a0dc..2f7a2f3 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2582,6 +2582,19 @@
mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
/*
+ * If Power Off Notify capability is enabled by the host,
+ * set notify to short power off notify timeout value.
+ */
+ if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY)
+ mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
+ else
+ mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE;
+
+ /* Initial value for re-tuning timer count */
+ host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
+ SDHCI_RETUNING_TIMER_COUNT_SHIFT;
+
+ /*
* In case Re-tuning Timer is not disabled, the actual value of
* re-tuning timer will be 2 ^ (n - 1).
*/