From: Macpaul Lin <macpaul@xxxxxxxxx>
Copy usb_otg_descriptor from config's descriptor if host requests
USB_DT_OTG.
Signed-off-by: Macpaul Lin <macpaul@xxxxxxxxx>
Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx>
Reviewed-by: Roger Quadros <rogerq@xxxxxx>
---
drivers/usb/gadget/composite.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 4e3447b..2c1c6eb 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -19,6 +19,7 @@
#include <linux/utsname.h>
#include <linux/usb/composite.h>
+#include <linux/usb/otg.h>
#include <asm/unaligned.h>
#include "u_os_desc.h"
@@ -1534,6 +1535,32 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
value = min(w_length, (u16) value);
}
break;
+ case USB_DT_OTG:
+ if (gadget_is_otg(gadget)) {
+ struct usb_configuration *config;
+ int otg_desc_len = 0;
+
+ if (cdev->config)
+ config = cdev->config;
+ else
+ config = list_first_entry(
+ &cdev->configs,
+ struct usb_configuration, list);
+ if (!config)
+ goto done;
+
+ if (gadget->otg_caps &&
+ (gadget->otg_caps->otg_rev >= 0x0200))
+ otg_desc_len += sizeof(
+ struct usb_otg20_descriptor);
+ else
+ otg_desc_len += sizeof(
+ struct usb_otg_descriptor);
+
+ value = min_t(int, w_length, otg_desc_len);
+ memcpy(req->buf, config->descriptors[0], value);
+ }
+ break;
}
break;
--
1.9.1
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