[PATCH v3 13/14] usb: dwc2: Use register_otg_device

[Jules Maselbas]

Signed-off-by: Jules Maselbas <jmaselbas at kalray.eu>
---
 drivers/usb/dwc2/dwc2.c | 29 ++++++++++++++++++++++++++---
 drivers/usb/dwc2/dwc2.h |  4 ++--
 2 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/dwc2/dwc2.c b/drivers/usb/dwc2/dwc2.c
index 2d14b218a..7a8ba6c4f 100644
--- a/drivers/usb/dwc2/dwc2.c
+++ b/drivers/usb/dwc2/dwc2.c
@@ -28,6 +28,27 @@ static void dwc2_uninit_common(struct dwc2 *dwc2)
 	dwc2_writel(dwc2, hprt0, HPRT0);
 }
 
+static int dwc2_set_mode(void *ctx, enum usb_dr_mode mode)
+{
+	struct dwc2 *dwc2 = ctx;
+	int ret = -ENODEV;
+
+	if (mode == USB_DR_MODE_HOST || mode == USB_DR_MODE_OTG) {
+		if (IS_ENABLED(CONFIG_USB_DWC2_HOST))
+			ret = dwc2_register_host(dwc2);
+		else
+			dwc2_err(dwc2, "Host support not available\n");
+	}
+	if (mode == USB_DR_MODE_PERIPHERAL || mode == USB_DR_MODE_OTG) {
+		if (IS_ENABLED(CONFIG_USB_DWC2_GADGET))
+			ret = dwc2_gadget_init(dwc2);
+		else
+			dwc2_err(dwc2, "Peripheral support not available\n");
+	}
+
+	return ret;
+}
+
 static int dwc2_probe(struct device_d *dev)
 {
 	struct resource *iores;
@@ -58,15 +79,17 @@ static int dwc2_probe(struct device_d *dev)
 	/* Detect config values from hardware */
 	dwc2_get_hwparams(dwc2);
 
-	dwc2_get_dr_mode(dwc2);
+	ret = dwc2_get_dr_mode(dwc2);
 
 	dwc2_set_default_params(dwc2);
 
 	dma_set_mask(dev, DMA_BIT_MASK(32));
 
-	ret = dwc2_register_host(dwc2);
+	if (dwc2->dr_mode == USB_DR_MODE_OTG)
+		ret = usb_register_otg_device(dwc2->dev, dwc2_set_mode, dwc2);
+	else
+		ret = dwc2_set_mode(dwc2, dwc2->dr_mode);
 
-	ret = dwc2_gadget_init(dwc2);
 error:
 	return ret;
 }
diff --git a/drivers/usb/dwc2/dwc2.h b/drivers/usb/dwc2/dwc2.h
index 0ec21a5ac..5e845f349 100644
--- a/drivers/usb/dwc2/dwc2.h
+++ b/drivers/usb/dwc2/dwc2.h
@@ -35,12 +35,12 @@ int dwc2_submit_roothub(struct dwc2 *dwc2, struct usb_device *dev,
 		struct devrequest *setup);
 int dwc2_register_host(struct dwc2 *dwc2);
 #else
-static inline int dwc2_register_host(struct dwc2 *dwc2) { return 0; }
+static inline int dwc2_register_host(struct dwc2 *dwc2) { return -ENODEV; }
 #endif
 
 /* Gadget functions */
 #ifdef CONFIG_USB_DWC2_GADGET
 int dwc2_gadget_init(struct dwc2 *dwc2);
 #else
-static inline int dwc2_gadget_init(struct dwc2 *dwc2) { return 0; }
+static inline int dwc2_gadget_init(struct dwc2 *dwc2) { return -ENODEV; }
 #endif
-- 
2.17.1