usb: chipidea: OTG HNP and SRP fsm implementation

USB OTG interrupt handling and fsm transitions according to USB OTG
and EH 2.0.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index cba7fd63d6e3..150592f10b3d 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -28,6 +28,7 @@
 #include "bits.h"
 #include "debug.h"
 #include "otg.h"
+#include "otg_fsm.h"
 
 /* control endpoint description */
 static const struct usb_endpoint_descriptor
@@ -1644,6 +1645,13 @@ static int ci_udc_start(struct usb_gadget *gadget,
                 return retval;
 
         ci->driver = driver;
+
+        /* Start otg fsm for B-device */
+        if (ci_otg_is_fsm_mode(ci) && ci->fsm.id) {
+                ci_hdrc_otg_fsm_start(ci);
+                return retval;
+        }
+
         pm_runtime_get_sync(&ci->gadget.dev);
         if (ci->vbus_active) {
                 spin_lock_irqsave(&ci->lock, flags);