From: Marek Szyprowski m.szyprowski@samsung.com
This patch adds code to select standard, commonly used usb endpoint configuration (ep1in-bulk, ep2out-bulk, ep3in-int) to dwc3 driver. This ensures compatibility with old userspace and windows drivers, which expects hardcoded endpoint numbers.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- drivers/usb/gadget/epautoconf.c | 21 ++++++++++++++++++++- drivers/usb/gadget/gadget_chips.h | 8 ++++++++ 2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c index 0df4b2a..899f254 100644 --- a/drivers/usb/gadget/epautoconf.c +++ b/drivers/usb/gadget/epautoconf.c @@ -220,7 +220,7 @@ struct usb_ep *usb_ep_autoconfig( struct usb_endpoint_descriptor *desc ) { - struct usb_ep *ep; + struct usb_ep *ep = NULL; u8 type;
type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; @@ -261,6 +261,25 @@ struct usb_ep *usb_ep_autoconfig( ep = find_ep(gadget, "ep1-bulk"); if (ep && ep_matches(gadget, ep, desc)) return ep; + } else if (gadget_is_dwc3(gadget)) { + const char *name = NULL; + /* + First try standard, common configuration: ep1in-bulk, + ep2out-bulk, ep3in-int to match other udc drivers to avoid confusion + in already deployed software (endpoint numbers hardcoded in userspace + software/drivers) + */ + if ((desc->bEndpointAddress & USB_DIR_IN) && type == USB_ENDPOINT_XFER_BULK) + name = "ep1in"; + else if ((desc->bEndpointAddress & USB_DIR_IN) == 0 && type == USB_ENDPOINT_XFER_BULK) + name = "ep2out"; + else if ((desc->bEndpointAddress & USB_DIR_IN) && type == USB_ENDPOINT_XFER_INT) + name = "ep3in"; + + if (name) + ep = find_ep(gadget, name); + if (ep && ep_matches(gadget, ep, desc)) + return ep; }
/* Second, look at endpoints until an unclaimed one looks usable */ diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h index cc94771..c859df2 100644 --- a/drivers/usb/gadget/gadget_chips.h +++ b/drivers/usb/gadget/gadget_chips.h @@ -156,6 +156,14 @@ #define gadget_is_fotg210(g) 0 #endif
+#ifdef CONFIG_USB_DWC3_GADGET +#define gadget_is_dwc3(g) (!strcmp("dwc3-gadget", (g)->name)) +#else +#define gadget_is_dwc3(g) 0 +#endif + + + /* * CONFIG_USB_GADGET_SX2 * CONFIG_USB_GADGET_AU1X00