--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -659,6 +659,7 @@

 #define AR933X_BOOTSTRAP_MDIO_GPIO_EN	BIT(18)
 #define AR933X_BOOTSTRAP_EEPBUSY	BIT(4)
+#define AR933X_BOOTSTRAP_USB_MODE_HOST	BIT(3)
 #define AR933X_BOOTSTRAP_REF_CLK_40	BIT(0)

 #define AR934X_BOOTSTRAP_SW_OPTION8	BIT(23)
@@ -688,6 +689,8 @@

 #define QCA956X_BOOTSTRAP_REF_CLK_40	BIT(2)

+#define AR933X_USB_CONFIG_HOST_ONLY   BIT(8)
+
 #define AR934X_PCIE_WMAC_INT_WMAC_MISC		BIT(0)
 #define AR934X_PCIE_WMAC_INT_WMAC_TX		BIT(1)
 #define AR934X_PCIE_WMAC_INT_WMAC_RXLP		BIT(2)
--- a/arch/mips/ath79/dev-usb.c
+++ b/arch/mips/ath79/dev-usb.c
@@ -19,6 +19,9 @@
 #include <linux/platform_device.h>
 #include <linux/usb/ehci_pdriver.h>
 #include <linux/usb/ohci_pdriver.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
+#include <linux/usb/usb_phy_generic.h>

 #include <asm/mach-ath79/ath79.h>
 #include <asm/mach-ath79/ar71xx_regs.h>
@@ -170,6 +173,44 @@ static void __init ar913x_usb_setup(void
 			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
 }

+static void __init ar9xxx_ci_usb_setup(int bus_id, int irq)
+{
+	struct ci_hdrc_platform_data ci_pdata;
+	bool host_mode = true;
+
+	if (soc_is_ar933x())
+		host_mode = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP) &
+			    AR933X_BOOTSTRAP_USB_MODE_HOST;
+	else
+		host_mode = !(ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP) &
+			      AR934X_BOOTSTRAP_USB_MODE_DEVICE);
+
+	if (host_mode) {
+		ath79_usb_register("ehci-platform", bus_id,
+				   AR934X_EHCI_BASE, AR934X_EHCI_SIZE,
+				   irq, &ath79_ehci_pdata_v2,
+				   sizeof(ath79_ehci_pdata_v2));
+
+		return;
+	}
+
+	memset(&ci_pdata, 0, sizeof(ci_pdata));
+	ci_pdata.name = "ci_hdrc_ar9xxx";
+	ci_pdata.capoffset = DEF_CAPOFFSET;
+	ci_pdata.dr_mode = USB_DR_MODE_PERIPHERAL;
+	ci_pdata.flags = CI_HDRC_DUAL_ROLE_NOT_OTG | CI_HDRC_DP_ALWAYS_PULLUP;
+	ci_pdata.vbus_extcon.edev = ERR_PTR(-ENODEV);
+	ci_pdata.id_extcon.edev = ERR_PTR(-ENODEV);
+	ci_pdata.itc_setting = 1;
+
+	platform_device_register_simple("usb_phy_generic",
+					PLATFORM_DEVID_AUTO, NULL, 0);
+
+	ath79_usb_register("ci_hdrc", -1,
+			   AR934X_EHCI_BASE, AR934X_EHCI_SIZE,
+			   irq, &ci_pdata, sizeof(ci_pdata));
+}
+
 static void __init ar933x_usb_setup(void)
 {
 	ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
@@ -181,10 +222,7 @@ static void __init ar933x_usb_setup(void
 	ath79_device_reset_clear(AR933X_RESET_USB_PHY);
 	mdelay(10);

-	ath79_usb_register("ehci-platform", -1,
-			   AR933X_EHCI_BASE, AR933X_EHCI_SIZE,
-			   ATH79_CPU_IRQ(3),
-			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
+	ar9xxx_ci_usb_setup(-1, ATH79_CPU_IRQ(3));
 }

 static void enable_tx_tx_idp_violation_fix(unsigned base)
@@ -230,10 +268,7 @@ static void __init ar934x_usb_setup(void
 	if (ath79_soc_rev >= 3)
 		ath79_ehci_pdata_v2.reset_notifier = ar934x_usb_reset_notifier;

-	ath79_usb_register("ehci-platform", -1,
-			   AR934X_EHCI_BASE, AR934X_EHCI_SIZE,
-			   ATH79_CPU_IRQ(3),
-			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
+	ar9xxx_ci_usb_setup(-1, ATH79_CPU_IRQ(3));
 }

 static void __init qca953x_usb_setup(void)
@@ -285,10 +317,7 @@ static void __init qca955x_usb_setup(voi
 {
 	ath79_ehci_pdata_v2.reset_notifier = qca955x_usb_reset_notifier;

-	ath79_usb_register("ehci-platform", 0,
-			   QCA955X_EHCI0_BASE, QCA955X_EHCI_SIZE,
-			   ATH79_IP3_IRQ(0),
-			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
+	ar9xxx_ci_usb_setup(0, ATH79_IP3_IRQ(0));

 	ath79_usb_register("ehci-platform", 1,
 			   QCA955X_EHCI1_BASE, QCA955X_EHCI_SIZE,