MLK-14256 usb: chipidea: udc: update gadget state after bus resume

Gadget state is set to be suspended when bus suspened, but not updated
after resume, this patch saves the gadget state before suspend and
restores it after resume.

Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>

diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index 081a501..9c8d20d 100644 (file)
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -178,6 +178,7 @@ struct hw_bank {
  * @td_pool: allocation pool for transfer descriptors
  * @gadget: device side representation for peripheral controller
  * @driver: gadget driver
+ * @resume_state: save the state of gadget suspend from
  * @hw_ep_max: total number of endpoints supported by hardware
  * @ci_hw_ep: array of endpoints
  * @ep0_dir: ep0 direction
@@ -227,6 +228,7 @@ struct ci_hdrc {
 
        struct usb_gadget               gadget;
        struct usb_gadget_driver        *driver;
+       enum usb_device_state           resume_state;
        unsigned                        hw_ep_max;
        struct ci_hw_ep                 ci_hw_ep[ENDPT_MAX];
        u32                             ep0_dir;

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 5b4f92c..31f7ea1 100644 (file)
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1892,27 +1892,32 @@ static irqreturn_t udc_irq(struct ci_hdrc *ci)
                        if (ci->usb_phy)
                                usb_phy_set_event(ci->usb_phy,
                                        USB_EVENT_ENUMERATED);
-                       if (ci->suspended && ci->driver->resume) {
-                               spin_unlock(&ci->lock);
-                               ci->driver->resume(&ci->gadget);
-                               spin_lock(&ci->lock);
+                       if (ci->suspended) {
+                               if (ci->driver->resume) {
+                                       spin_unlock(&ci->lock);
+                                       ci->driver->resume(&ci->gadget);
+                                       spin_lock(&ci->lock);
+                               }
                                ci->suspended = 0;
+                               usb_gadget_set_state(&ci->gadget,
+                                               ci->resume_state);
                        }
                }
 
                if (USBi_UI  & intr)
                        isr_tr_complete_handler(ci);
 
-               if (USBi_SLI & intr) {
+               if ((USBi_SLI & intr) && !(ci->suspended)) {
+                       ci->suspended = 1;
+                       ci->resume_state = ci->gadget.state;
                        if (ci->gadget.speed != USB_SPEED_UNKNOWN &&
                            ci->driver->suspend) {
-                               ci->suspended = 1;
                                spin_unlock(&ci->lock);
                                ci->driver->suspend(&ci->gadget);
-                               usb_gadget_set_state(&ci->gadget,
-                                               USB_STATE_SUSPENDED);
                                spin_lock(&ci->lock);
                        }
+                       usb_gadget_set_state(&ci->gadget,
+                                       USB_STATE_SUSPENDED);
                }
                retval = IRQ_HANDLED;
        } else {