USB: android: Add OTG descriptor to configuration
Include OTG descriptor in configuration when gadget is
capable of OTG. SRP and HNP capablities are exposed for now.
This patch will help to inform USB Host that our device
is OTG capable via configuration descriptor.
Change-Id: Idc72ee8168a478f0124c91b99d3123eab5e71adb
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
diff --git a/drivers/usb/gadget/android.c b/drivers/usb/gadget/android.c
index 7e731de..91c3123 100644
--- a/drivers/usb/gadget/android.c
+++ b/drivers/usb/gadget/android.c
@@ -164,6 +164,18 @@
.bNumConfigurations = 1,
};
+static struct usb_otg_descriptor otg_descriptor = {
+ .bLength = sizeof otg_descriptor,
+ .bDescriptorType = USB_DT_OTG,
+ .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
+ .bcdOTG = __constant_cpu_to_le16(0x0200),
+};
+
+static const struct usb_descriptor_header *otg_desc[] = {
+ (struct usb_descriptor_header *) &otg_descriptor,
+ NULL,
+};
+
static struct usb_configuration android_config_driver = {
.label = "android",
.unbind = android_unbind_config,
@@ -1352,6 +1364,9 @@
strings_dev[STRING_SERIAL_IDX].id = id;
device_desc.iSerialNumber = id;
+ if (gadget_is_otg(cdev->gadget))
+ android_config_driver.descriptors = otg_desc;
+
gcnum = usb_gadget_controller_number(gadget);
if (gcnum >= 0)
device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);