[U-Boot] [PATCH 10/16] usb: dwc2: Add function for session B check

[Patrick Delaunay]

Add a new function to check the session B validity, to be use to check
cable connection.

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 drivers/usb/gadget/dwc2_udc_otg.c | 9 +++++++++
 include/usb/dwc2_udc.h            | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/drivers/usb/gadget/dwc2_udc_otg.c b/drivers/usb/gadget/dwc2_udc_otg.c
index 146f11e..b1efad1 100644
--- a/drivers/usb/gadget/dwc2_udc_otg.c
+++ b/drivers/usb/gadget/dwc2_udc_otg.c
@@ -1151,4 +1151,13 @@ U_BOOT_DRIVER(dwc2_udc_otg) = {
 	.platdata_auto_alloc_size = sizeof(struct dwc2_plat_otg_data),
 	.priv_auto_alloc_size = sizeof(struct dwc2_priv_data),
 };
+
+int dwc2_udc_B_session_valid(struct udevice *dev)
+{
+	struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
+	struct dwc2_usbotg_reg *usbotg_reg =
+		(struct dwc2_usbotg_reg *)platdata->regs_otg;
+
+	return readl(&usbotg_reg->gotgctl) & B_SESSION_VALID;
+}
 #endif /* CONFIG_IS_ENABLED(DM_USB_GADGET) */
diff --git a/include/usb/dwc2_udc.h b/include/usb/dwc2_udc.h
index 3cf20ea..8a426b6 100644
--- a/include/usb/dwc2_udc.h
+++ b/include/usb/dwc2_udc.h
@@ -27,4 +27,6 @@ struct dwc2_plat_otg_data {
 
 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata);
 
+int dwc2_udc_B_session_valid(struct udevice *dev);
+
 #endif	/* __DWC2_USB_GADGET */
-- 
2.7.4