1 files changed, 51 insertions, 12 deletions

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 2ea429c27714..a78bd4f3aecc 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -58,6 +58,8 @@ static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
 #ifdef CONFIG_PM_RUNTIME
 static int sdhci_runtime_pm_get(struct sdhci_host *host);
 static int sdhci_runtime_pm_put(struct sdhci_host *host);
+static void sdhci_runtime_pm_bus_on(struct sdhci_host *host);
+static void sdhci_runtime_pm_bus_off(struct sdhci_host *host);
 #else
 static inline int sdhci_runtime_pm_get(struct sdhci_host *host)
 {
@@ -67,6 +69,12 @@ static inline int sdhci_runtime_pm_put(struct sdhci_host *host)
 {
 	return 0;
 }
+static void sdhci_runtime_pm_bus_on(struct sdhci_host *host)
+{
+}
+static void sdhci_runtime_pm_bus_off(struct sdhci_host *host)
+{
+}
 #endif
 
 static void sdhci_dumpregs(struct sdhci_host *host)
@@ -192,8 +200,12 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
 
 	sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
 
-	if (mask & SDHCI_RESET_ALL)
+	if (mask & SDHCI_RESET_ALL) {
 		host->clock = 0;
+		/* Reset-all turns off SD Bus Power */
+		if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
+			sdhci_runtime_pm_bus_off(host);
+	}
 
 	/* Wait max 100 ms */
 	timeout = 100;
@@ -1268,6 +1280,8 @@ static int sdhci_set_power(struct sdhci_host *host, unsigned short power)
 
 	if (pwr == 0) {
 		sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
+		if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
+			sdhci_runtime_pm_bus_off(host);
 		return 0;
 	}
 
@@ -1289,6 +1303,9 @@ static int sdhci_set_power(struct sdhci_host *host, unsigned short power)
 
 	sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
 
+	if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
+		sdhci_runtime_pm_bus_on(host);
+
 	/*
 	 * Some controllers need an extra 10ms delay of 10ms before they
 	 * can apply clock after applying power
@@ -1526,16 +1543,15 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
 			ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 			/* Select Bus Speed Mode for host */
 			ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
-			if (ios->timing == MMC_TIMING_MMC_HS200)
-				ctrl_2 |= SDHCI_CTRL_HS_SDR200;
+			if ((ios->timing == MMC_TIMING_MMC_HS200) ||
+			    (ios->timing == MMC_TIMING_UHS_SDR104))
+				ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
 			else if (ios->timing == MMC_TIMING_UHS_SDR12)
 				ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
 			else if (ios->timing == MMC_TIMING_UHS_SDR25)
 				ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
 			else if (ios->timing == MMC_TIMING_UHS_SDR50)
 				ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
-			else if (ios->timing == MMC_TIMING_UHS_SDR104)
-				ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
 			else if (ios->timing == MMC_TIMING_UHS_DDR50)
 				ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
 			sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
@@ -1846,7 +1862,7 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
 	 */
 	if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) &&
 	    (host->flags & SDHCI_SDR50_NEEDS_TUNING ||
-	     host->flags & SDHCI_HS200_NEEDS_TUNING))
+	     host->flags & SDHCI_SDR104_NEEDS_TUNING))
 		requires_tuning_nonuhs = true;
 
 	if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR104) ||
@@ -2046,11 +2062,14 @@ static void sdhci_card_event(struct mmc_host *mmc)
 	struct sdhci_host *host = mmc_priv(mmc);
 	unsigned long flags;
 
+	/* First check if client has provided their own card event */
+	if (host->ops->card_event)
+		host->ops->card_event(host);
+
 	spin_lock_irqsave(&host->lock, flags);
 
 	/* Check host->mrq first in case we are runtime suspended */
-	if (host->mrq &&
-	    !(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
+	if (host->mrq && !sdhci_do_get_cd(host)) {
 		pr_err("%s: Card removed during transfer!\n",
 			mmc_hostname(host->mmc));
 		pr_err("%s: Resetting controller.\n",
@@ -2625,6 +2644,22 @@ static int sdhci_runtime_pm_put(struct sdhci_host *host)
 	return pm_runtime_put_autosuspend(host->mmc->parent);
 }
 
+static void sdhci_runtime_pm_bus_on(struct sdhci_host *host)
+{
+	if (host->runtime_suspended || host->bus_on)
+		return;
+	host->bus_on = true;
+	pm_runtime_get_noresume(host->mmc->parent);
+}
+
+static void sdhci_runtime_pm_bus_off(struct sdhci_host *host)
+{
+	if (host->runtime_suspended || !host->bus_on)
+		return;
+	host->bus_on = false;
+	pm_runtime_put_noidle(host->mmc->parent);
+}
+
 int sdhci_runtime_suspend_host(struct sdhci_host *host)
 {
 	unsigned long flags;
@@ -2962,9 +2997,13 @@ int sdhci_add_host(struct sdhci_host *host)
 		mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
 
 	/* SDR104 supports also implies SDR50 support */
-	if (caps[1] & SDHCI_SUPPORT_SDR104)
+	if (caps[1] & SDHCI_SUPPORT_SDR104) {
 		mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50;
-	else if (caps[1] & SDHCI_SUPPORT_SDR50)
+		/* SD3.0: SDR104 is supported so (for eMMC) the caps2
+		 * field can be promoted to support HS200.
+		 */
+		mmc->caps2 |= MMC_CAP2_HS200;
+	} else if (caps[1] & SDHCI_SUPPORT_SDR50)
 		mmc->caps |= MMC_CAP_UHS_SDR50;
 
 	if (caps[1] & SDHCI_SUPPORT_DDR50)
@@ -2974,9 +3013,9 @@ int sdhci_add_host(struct sdhci_host *host)
 	if (caps[1] & SDHCI_USE_SDR50_TUNING)
 		host->flags |= SDHCI_SDR50_NEEDS_TUNING;
 
-	/* Does the host need tuning for HS200? */
+	/* Does the host need tuning for SDR104 / HS200? */
 	if (mmc->caps2 & MMC_CAP2_HS200)
-		host->flags |= SDHCI_HS200_NEEDS_TUNING;
+		host->flags |= SDHCI_SDR104_NEEDS_TUNING;
 
 	/* Driver Type(s) (A, C, D) supported by the host */
 	if (caps[1] & SDHCI_DRIVER_TYPE_A)