update(port/dwc2/usb_dc_dwc2): clear crst bit because some mcu cannot be self-clearing, refs:#276

sakumisu · sakumisu · commit 1a39169f6e5a · 2024-11-25T21:03:51.000+08:00
diff --git a/port/dwc2/usb_dc_dwc2.c b/port/dwc2/usb_dc_dwc2.c
@@ -136,10 +136,12 @@ static inline int dwc2_reset(uint8_t busid)
 
     do {
         if (++count > 200000U) {
-            return -1;
+            break;
         }
     } while ((USB_OTG_GLB->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST);
 
+    USB_OTG_GLB->GRSTCTL &= ~USB_OTG_GRSTCTL_CSRST;
+
     return 0;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -136,10 +136,12 @@ static inline int dwc2_reset(uint8_t busid)`
`136`	`136`
`137`	`137`	`do {`
`138`	`138`	`if (++count > 200000U) {`
`139`		`- return -1;`
	`139`	`+ break;`
`140`	`140`	`}`
`141`	`141`	`} while ((USB_OTG_GLB->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST);`
`142`	`142`
	`143`	`+ USB_OTG_GLB->GRSTCTL &= ~USB_OTG_GRSTCTL_CSRST;`
	`144`	`+`
`143`	`145`	`return 0;`
`144`	`146`	`}`
`145`	`147`