usb: dwc2: gadget: add bi-directional endpoint support

GHWCFG1 provides hardware configuration of each endpoint. Use
it to configure the endpoints instead of assuming all even
endpoint are OUT and all odd endpoints are IN.

Tested-by: Robert Baldyga <[email protected]>
Acked-by: Paul Zimmerman <[email protected]>
Signed-off-by: Mian Yousaf Kaukab <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>

Author: Mian Yousaf Kaukab

drivers/usb/dwc2/core.h

@@ -696,7 +696,8 @@ struct dwc2_hsotg {
 	unsigned int connected:1;
 	unsigned int setup:1;
 	unsigned long last_rst;
-	struct s3c_hsotg_ep *eps;
+	struct s3c_hsotg_ep *eps_in[MAX_EPS_CHANNELS];
+	struct s3c_hsotg_ep *eps_out[MAX_EPS_CHANNELS];
 	u32 g_using_dma;
 #endif /* CONFIG_USB_DWC2_PERIPHERAL || CONFIG_USB_DWC2_DUAL_ROLE */
 };