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path: root/drivers/usb/gadget/config.c
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Diffstat (limited to 'drivers/usb/gadget/config.c')
-rw-r--r--drivers/usb/gadget/config.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/drivers/usb/gadget/config.c b/drivers/usb/gadget/config.c
index e3a98929d346..34e12fc52c23 100644
--- a/drivers/usb/gadget/config.c
+++ b/drivers/usb/gadget/config.c
@@ -19,7 +19,7 @@
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
-
+#include <linux/usb/composite.h>
/**
* usb_descriptor_fillbuf - fill buffer with descriptors
@@ -158,3 +158,40 @@ usb_copy_descriptors(struct usb_descriptor_header **src)
return ret;
}
EXPORT_SYMBOL_GPL(usb_copy_descriptors);
+
+int usb_assign_descriptors(struct usb_function *f,
+ struct usb_descriptor_header **fs,
+ struct usb_descriptor_header **hs,
+ struct usb_descriptor_header **ss)
+{
+ struct usb_gadget *g = f->config->cdev->gadget;
+
+ if (fs) {
+ f->fs_descriptors = usb_copy_descriptors(fs);
+ if (!f->fs_descriptors)
+ goto err;
+ }
+ if (hs && gadget_is_dualspeed(g)) {
+ f->hs_descriptors = usb_copy_descriptors(hs);
+ if (!f->hs_descriptors)
+ goto err;
+ }
+ if (ss && gadget_is_superspeed(g)) {
+ f->ss_descriptors = usb_copy_descriptors(ss);
+ if (!f->ss_descriptors)
+ goto err;
+ }
+ return 0;
+err:
+ usb_free_all_descriptors(f);
+ return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(usb_assign_descriptors);
+
+void usb_free_all_descriptors(struct usb_function *f)
+{
+ usb_free_descriptors(f->fs_descriptors);
+ usb_free_descriptors(f->hs_descriptors);
+ usb_free_descriptors(f->ss_descriptors);
+}
+EXPORT_SYMBOL_GPL(usb_free_all_descriptors);