dm: usb: xhci: Use a function to get xhci_ctrl

Rather than getting this directly from struct usb_device, call a function
to obtain it. This will make it possible for driver model to provide it
another way.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>

drivers/usb/host/xhci-ring.c

@@ -353,7 +353,7 @@ static void giveback_first_trb(struct usb_device *udev, int ep_index,
 				int start_cycle,
 				struct xhci_generic_trb *start_trb)
 {
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 
 	/*
 	 * Pass all the TRBs to the hardware at once and make sure this write
@@ -477,7 +477,7 @@ union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected)
  */
 static void abort_td(struct usb_device *udev, int ep_index)
 {
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	struct xhci_ring *ring =  ctrl->devs[udev->slot_id]->eps[ep_index].ring;
 	union xhci_trb *event;
 	u32 field;
@@ -554,7 +554,7 @@ int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe,
 	int start_cycle;
 	u32 field = 0;
 	u32 length_field = 0;
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	int slot_id = udev->slot_id;
 	int ep_index;
 	struct xhci_virt_device *virt_dev;
@@ -748,7 +748,7 @@ int xhci_ctrl_tx(struct usb_device *udev, unsigned long pipe,
 	u32 length_field;
 	u64 buf_64 = 0;
 	struct xhci_generic_trb *start_trb;
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	int slot_id = udev->slot_id;
 	int ep_index;
 	u32 trb_fields[4];

drivers/usb/host/xhci.c

@@ -110,6 +110,11 @@ static struct descriptor {
 
 static struct xhci_ctrl xhcic[CONFIG_USB_MAX_CONTROLLER_COUNT];
 
+struct xhci_ctrl *xhci_get_ctrl(struct usb_device *udev)
+{
+	return udev->controller;
+}
+
 /**
  * Waits for as per specified amount of time
  * for the "result" to match with "done"
@@ -250,7 +255,7 @@ static int xhci_configure_endpoints(struct usb_device *udev, bool ctx_change)
 {
 	struct xhci_container_ctx *in_ctx;
 	struct xhci_virt_device *virt_dev;
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	union xhci_trb *event;
 
 	virt_dev = ctrl->devs[udev->slot_id];
@@ -298,7 +303,7 @@ static int xhci_set_configuration(struct usb_device *udev)
 	int ep_index;
 	unsigned int dir;
 	unsigned int ep_type;
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	int num_of_ep;
 	int ep_flag = 0;
 	u64 trb_64 = 0;
@@ -382,7 +387,7 @@ static int xhci_set_configuration(struct usb_device *udev)
 static int xhci_address_device(struct usb_device *udev)
 {
 	int ret = 0;
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	struct xhci_slot_ctx *slot_ctx;
 	struct xhci_input_control_ctx *ctrl_ctx;
 	struct xhci_virt_device *virt_dev;
@@ -463,8 +468,8 @@ static int xhci_address_device(struct usb_device *udev)
  */
 int usb_alloc_device(struct usb_device *udev)
 {
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	union xhci_trb *event;
-	struct xhci_ctrl *ctrl = udev->controller;
 	int ret;
 
 	/*
@@ -510,7 +515,7 @@ int usb_alloc_device(struct usb_device *udev)
  */
 int xhci_check_maxpacket(struct usb_device *udev)
 {
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	unsigned int slot_id = udev->slot_id;
 	int ep_index = 0;	/* control endpoint */
 	struct xhci_container_ctx *in_ctx;
@@ -640,7 +645,7 @@ static int xhci_submit_root(struct usb_device *udev, unsigned long pipe,
 	int len, srclen;
 	uint32_t reg;
 	volatile uint32_t *status_reg;
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	struct xhci_hcor *hcor = ctrl->hcor;
 
 	if ((req->requesttype & USB_RT_PORT) &&
@@ -904,7 +909,7 @@ int
 submit_control_msg(struct usb_device *udev, unsigned long pipe, void *buffer,
 					int length, struct devrequest *setup)
 {
-	struct xhci_ctrl *ctrl = udev->controller;
+	struct xhci_ctrl *ctrl = xhci_get_ctrl(udev);
 	int ret = 0;
 
 	if (usb_pipetype(pipe) != PIPE_CONTROL) {

drivers/usb/host/xhci.h

@@ -1259,4 +1259,6 @@ int xhci_alloc_virt_device(struct usb_device *udev);
 int xhci_mem_init(struct xhci_ctrl *ctrl, struct xhci_hccr *hccr,
 		  struct xhci_hcor *hcor);
 
+struct xhci_ctrl *xhci_get_ctrl(struct usb_device *udev);
+
 #endif /* HOST_XHCI_H_ */