summaryrefslogtreecommitdiffstats
path: root/drivers/usb/musb/musb_virthub.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/musb/musb_virthub.c')
-rw-r--r--drivers/usb/musb/musb_virthub.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c
index a523950c2b32..d8bbdb366beb 100644
--- a/drivers/usb/musb/musb_virthub.c
+++ b/drivers/usb/musb/musb_virthub.c
@@ -266,6 +266,23 @@ int musb_hub_status_data(struct usb_hcd *hcd, char *buf)
return retval;
}
+static int musb_has_gadget(struct musb *musb)
+{
+ /*
+ * In host-only mode we start a connection right away. In OTG mode
+ * we have to wait until we loaded a gadget. We don't really need a
+ * gadget if we operate as a host but we should not start a session
+ * as a device without a gadget or else we explode.
+ */
+#ifdef CONFIG_USB_MUSB_HOST
+ return 1;
+#else
+ if (musb->port_mode == MUSB_PORT_MODE_HOST)
+ return 1;
+ return musb->g.dev.driver != NULL;
+#endif
+}
+
int musb_hub_control(
struct usb_hcd *hcd,
u16 typeReq,
@@ -408,7 +425,7 @@ int musb_hub_control(
* initialization logic, e.g. for OTG, or change any
* logic relating to VBUS power-up.
*/
- if (!hcd->self.is_b_host)
+ if (!hcd->self.is_b_host && musb_has_gadget(musb))
musb_start(musb);
break;
case USB_PORT_FEAT_RESET: