1 files changed, 99 insertions, 1 deletions

diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index e4efaf1e59..f25ed2dab0 100644
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -5,13 +5,15 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <cpu_func.h>
 #include <dm.h>
 #include <errno.h>
-#include <usb.h>
+#include <generic-phy.h>
 #include <malloc.h>
 #include <memalign.h>
 #include <phys2bus.h>
+#include <usb.h>
 #include <usbroothubdes.h>
 #include <wait_bit.h>
 #include <asm/io.h>
@@ -37,6 +39,8 @@ struct dwc2_priv {
 #ifdef CONFIG_DM_REGULATOR
 	struct udevice *vbus_supply;
 #endif
+	struct phy phy;
+	struct clk_bulk clks;
 #else
 	uint8_t *aligned_buffer;
 	uint8_t *status_buffer;
@@ -1147,6 +1151,8 @@ static int dwc2_reset(struct udevice *dev)
 			return ret;
 	}
 
+	/* force reset to clear all IP register */
+	reset_assert_bulk(&priv->resets);
 	ret = reset_deassert_bulk(&priv->resets);
 	if (ret) {
 		reset_release_bulk(&priv->resets);
@@ -1213,6 +1219,8 @@ static int dwc2_init_common(struct udevice *dev, struct dwc2_priv *priv)
 	if (readl(&regs->gintsts) & DWC2_GINTSTS_CURMODE_HOST)
 		mdelay(1000);
 
+	printf("USB DWC2\n");
+
 	return 0;
 }
 
@@ -1322,13 +1330,95 @@ static int dwc2_usb_ofdata_to_platdata(struct udevice *dev)
 	return 0;
 }
 
+static int dwc2_setup_phy(struct udevice *dev)
+{
+	struct dwc2_priv *priv = dev_get_priv(dev);
+	int ret;
+
+	ret = generic_phy_get_by_index(dev, 0, &priv->phy);
+	if (ret) {
+		if (ret == -ENOENT)
+			return 0; /* no PHY, nothing to do */
+		dev_err(dev, "Failed to get USB PHY: %d.\n", ret);
+		return ret;
+	}
+
+	ret = generic_phy_init(&priv->phy);
+	if (ret) {
+		dev_dbg(dev, "Failed to init USB PHY: %d.\n", ret);
+		return ret;
+	}
+
+	ret = generic_phy_power_on(&priv->phy);
+	if (ret) {
+		dev_dbg(dev, "Failed to power on USB PHY: %d.\n", ret);
+		generic_phy_exit(&priv->phy);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dwc2_shutdown_phy(struct udevice *dev)
+{
+	struct dwc2_priv *priv = dev_get_priv(dev);
+	int ret;
+
+	/* PHY is not valid when generic_phy_get_by_index() = -ENOENT */
+	if (!generic_phy_valid(&priv->phy))
+		return 0; /* no PHY, nothing to do */
+
+	ret = generic_phy_power_off(&priv->phy);
+	if (ret) {
+		dev_dbg(dev, "Failed to power off USB PHY: %d.\n", ret);
+		return ret;
+	}
+
+	ret = generic_phy_exit(&priv->phy);
+	if (ret) {
+		dev_dbg(dev, "Failed to power off USB PHY: %d.\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dwc2_clk_init(struct udevice *dev)
+{
+	struct dwc2_priv *priv = dev_get_priv(dev);
+	int ret;
+
+	ret = clk_get_bulk(dev, &priv->clks);
+	if (ret == -ENOSYS || ret == -ENOENT)
+		return 0;
+	if (ret)
+		return ret;
+
+	ret = clk_enable_bulk(&priv->clks);
+	if (ret) {
+		clk_release_bulk(&priv->clks);
+		return ret;
+	}
+
+	return 0;
+}
+
 static int dwc2_usb_probe(struct udevice *dev)
 {
 	struct dwc2_priv *priv = dev_get_priv(dev);
 	struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
+	int ret;
 
 	bus_priv->desc_before_addr = true;
 
+	ret = dwc2_clk_init(dev);
+	if (ret)
+		return ret;
+
+	ret = dwc2_setup_phy(dev);
+	if (ret)
+		return ret;
+
 	return dwc2_init_common(dev, priv);
 }
 
@@ -1341,9 +1431,17 @@ static int dwc2_usb_remove(struct udevice *dev)
 	if (ret)
 		return ret;
 
+	ret = dwc2_shutdown_phy(dev);
+	if (ret) {
+		dev_dbg(dev, "Failed to shutdown USB PHY: %d.\n", ret);
+		return ret;
+	}
+
 	dwc2_uninit_common(priv->regs);
 
 	reset_release_bulk(&priv->resets);
+	clk_disable_bulk(&priv->clks);
+	clk_release_bulk(&priv->clks);
 
 	return 0;
 }