usb: gadget: udc: atmel: update endpoint allocation for sam9x60

The DPRAM memory from the USB High Speed Device Port (UDPHS) hardware
block was increased. This patch updates the endpoint allocation for sam9x60
to take advantage of this larger memory. At the same time the
constraint to allocate the endpoints in order was lifted. To handle old
and new hardware in the same driver the capabilities (caps) structure
was extended.

Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>

Author: cristibirsan

drivers/usb/gadget/udc/atmel_usba_udc.c

@@ -1065,12 +1065,14 @@ static struct usb_ep *atmel_usba_match_ep(struct usb_gadget *gadget,
 
 		case USB_ENDPOINT_XFER_ISOC:
 			ep->fifo_size = 1024;
-			ep->nr_banks = 2;
+			if (ep->udc->caps->ep_prealloc)
+				ep->nr_banks = 2;
 			break;
 
 		case USB_ENDPOINT_XFER_BULK:
 			ep->fifo_size = 512;
-			ep->nr_banks = 1;
+			if (ep->udc->caps->ep_prealloc)
+				ep->nr_banks = 1;
 			break;
 
 		case USB_ENDPOINT_XFER_INT:
@@ -1080,7 +1082,8 @@ static struct usb_ep *atmel_usba_match_ep(struct usb_gadget *gadget,
 			else
 				ep->fifo_size =
 				    roundup_pow_of_two(le16_to_cpu(desc->wMaxPacketSize));
-			ep->nr_banks = 1;
+			if (ep->udc->caps->ep_prealloc)
+				ep->nr_banks = 1;
 			break;
 		}
 
@@ -2033,16 +2036,27 @@ static void at91sam9g45_pulse_bias(struct usba_udc *udc)
 
 static const struct usba_udc_caps at91sam9rl_caps = {
 	.toggle_bias = at91sam9rl_toggle_bias,
+	.ep_prealloc = true,
 };
 
 static const struct usba_udc_caps at91sam9g45_caps = {
 	.pulse_bias = at91sam9g45_pulse_bias,
+	.ep_prealloc = true,
+};
+
+static const struct usba_udc_caps sama5d3_caps = {
+	.ep_prealloc = true,
+};
+
+static const struct usba_udc_caps at91sam9x60_caps = {
+	.ep_prealloc = false,
 };
 
 static const struct of_device_id atmel_udc_dt_ids[] = {
 	{ .compatible = "atmel,at91sam9rl-udc", .data = &at91sam9rl_caps },
 	{ .compatible = "atmel,at91sam9g45-udc", .data = &at91sam9g45_caps },
-	{ .compatible = "atmel,sama5d3-udc" },
+	{ .compatible = "atmel,sama5d3-udc", .data = &sama5d3_caps },
+	{ .compatible = "microchip,sam9x60-udc", .data = &at91sam9x60_caps },
 	{ /* sentinel */ }
 };
 

drivers/usb/gadget/udc/atmel_usba_udc.h

@@ -305,6 +305,7 @@ struct usba_request {
 struct usba_udc_caps {
 	void (*toggle_bias)(struct usba_udc *udc, int is_on);
 	void (*pulse_bias)(struct usba_udc *udc);
+	bool ep_prealloc;
 };
 
 struct usba_udc {