pmic: Add support for the Dialog DA9053 PMIC

[u-boot] / drivers / usb / gadget / ether.c

diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index f909267f65a6341d51645a30617923a564b3c261..9fb0e80ad1f3b01a13d881fd09304d346d2d10a1 100644 (file)
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -1921,10 +1921,22 @@ static void eth_start(struct eth_dev *dev, gfp_t gfp_flags)
 
 static int eth_stop(struct eth_dev *dev)
 {
+#ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT
+       unsigned long ts;
+       unsigned long timeout = CONFIG_SYS_HZ; /* 1 sec to stop RNDIS */
+#endif
+
        if (rndis_active(dev)) {
                rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, 0);
                rndis_signal_disconnect(dev->rndis_config);
 
+#ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT
+               /* Wait until host receives OID_GEN_MEDIA_CONNECT_STATUS */
+               ts = get_timer(0);
+               while (get_timer(ts) < timeout)
+                       usb_gadget_handle_interrupts();
+#endif
+
                rndis_uninit(dev->rndis_config);
                dev->rndis = 0;
        }
@@ -2486,6 +2498,17 @@ void usb_eth_halt(struct eth_device *netdev)
        if (!dev->gadget)
                return;
 
+       /*
+        * Some USB controllers may need additional deinitialization here
+        * before dropping pull-up (also due to hardware issues).
+        * For example: unhandled interrupt with status stage started may
+        * bring the controller to fully broken state (until board reset).
+        * There are some variants to debug and fix such cases:
+        * 1) In the case of RNDIS connection eth_stop can perform additional
+        * interrupt handling. See RNDIS_COMPLETE_SIGNAL_DISCONNECT definition.
+        * 2) 'pullup' callback in your UDC driver can be improved to perform
+        * this deinitialization.
+        */
        eth_stop(dev);
 
        usb_gadget_disconnect(dev->gadget);