--- zzzz-none-000/linux-3.10.107/drivers/usb/wusbcore/wa-hc.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/usb/wusbcore/wa-hc.h	2021-02-04 17:41:59.000000000 +0000
@@ -36,7 +36,7 @@
  *
  *  hcd        glue with the USB API Host Controller Interface API.
  *
- *  nep        Notification EndPoint managent: collect notifications
+ *  nep        Notification EndPoint management: collect notifications
  *             and queue them with the workqueue daemon.
  *
  *             Handle notifications as coming from the NEP. Sends them
@@ -64,7 +64,7 @@
  *
  * Note much of the activity is difficult to follow. For example a
  * device connect goes to devconnect, which will cause the "fake" root
- * hub port to show a connect and stop there. Then khubd will notice
+ * hub port to show a connect and stop there. Then hub_wq will notice
  * and call into the rh.c:hwahc_rc_port_reset() code to authenticate
  * the device (and this might require user intervention) and enable
  * the port.
@@ -91,6 +91,7 @@
 struct wusbhc;
 struct wahc;
 extern void wa_urb_enqueue_run(struct work_struct *ws);
+extern void wa_process_errored_transfers_run(struct work_struct *ws);
 
 /**
  * RPipe instance
@@ -116,11 +117,38 @@
 	struct wahc *wa;
 	spinlock_t seg_lock;
 	struct list_head seg_list;
+	struct list_head list_node;
 	atomic_t segs_available;
 	u8 buffer[1];	/* For reads/writes on USB */
 };
 
 
+enum wa_dti_state {
+	WA_DTI_TRANSFER_RESULT_PENDING,
+	WA_DTI_ISOC_PACKET_STATUS_PENDING,
+	WA_DTI_BUF_IN_DATA_PENDING
+};
+
+enum wa_quirks {
+	/*
+	 * The Alereon HWA expects the data frames in isochronous transfer
+	 * requests to be concatenated and not sent as separate packets.
+	 */
+	WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC	= 0x01,
+	/*
+	 * The Alereon HWA can be instructed to not send transfer notifications
+	 * as an optimization.
+	 */
+	WUSB_QUIRK_ALEREON_HWA_DISABLE_XFER_NOTIFICATIONS	= 0x02,
+};
+
+enum wa_vendor_specific_requests {
+	WA_REQ_ALEREON_DISABLE_XFER_NOTIFICATIONS = 0x4C,
+	WA_REQ_ALEREON_FEATURE_SET = 0x01,
+	WA_REQ_ALEREON_FEATURE_CLEAR = 0x00,
+};
+
+#define WA_MAX_BUF_IN_URBS	4
 /**
  * Instance of a HWA Host Controller
  *
@@ -129,7 +157,7 @@
  *
  * @wa_descr  Can be accessed without locking because it is in
  *            the same area where the device descriptors were
- *            read, so it is guaranteed to exist umodified while
+ *            read, so it is guaranteed to exist unmodified while
  *            the device exists.
  *
  *            Endianess has been converted to CPU's.
@@ -152,8 +180,8 @@
  *                       submitted from an atomic context).
  *
  * FIXME: this needs to be layered up: a wusbhc layer (for sharing
- *        comonalities with WHCI), a wa layer (for sharing
- *        comonalities with DWA-RC).
+ *        commonalities with WHCI), a wa layer (for sharing
+ *        commonalities with DWA-RC).
  */
 struct wahc {
 	struct usb_device *usb_dev;
@@ -177,27 +205,51 @@
 
 	u16 rpipes;
 	unsigned long *rpipe_bm;	/* rpipe usage bitmap */
-	spinlock_t rpipe_bm_lock;	/* protect rpipe_bm */
+	struct list_head rpipe_delayed_list;	/* delayed RPIPES. */
+	spinlock_t rpipe_lock;	/* protect rpipe_bm and delayed list */
 	struct mutex rpipe_mutex;	/* assigning resources to endpoints */
 
+	/*
+	 * dti_state is used to track the state of the dti_urb. When dti_state
+	 * is WA_DTI_ISOC_PACKET_STATUS_PENDING, dti_isoc_xfer_in_progress and
+	 * dti_isoc_xfer_seg identify which xfer the incoming isoc packet
+	 * status refers to.
+	 */
+	enum wa_dti_state dti_state;
+	u32 dti_isoc_xfer_in_progress;
+	u8  dti_isoc_xfer_seg;
 	struct urb *dti_urb;		/* URB for reading xfer results */
-	struct urb *buf_in_urb;		/* URB for reading data in */
+					/* URBs for reading data in */
+	struct urb buf_in_urbs[WA_MAX_BUF_IN_URBS];
+	int active_buf_in_urbs;		/* number of buf_in_urbs active. */
 	struct edc dti_edc;		/* DTI error density counter */
-	struct wa_xfer_result *xfer_result; /* real size = dti_ep maxpktsize */
-	size_t xfer_result_size;
+	void *dti_buf;
+	size_t dti_buf_size;
+
+	unsigned long dto_in_use;	/* protect dto endoint serialization */
 
 	s32 status;			/* For reading status */
 
 	struct list_head xfer_list;
 	struct list_head xfer_delayed_list;
+	struct list_head xfer_errored_list;
+	/*
+	 * lock for the above xfer lists.  Can be taken while a xfer->lock is
+	 * held but not in the reverse order.
+	 */
 	spinlock_t xfer_list_lock;
-	struct work_struct xfer_work;
+	struct work_struct xfer_enqueue_work;
+	struct work_struct xfer_error_work;
 	atomic_t xfer_id_count;
+
+	kernel_ulong_t	quirks;
 };
 
 
-extern int wa_create(struct wahc *wa, struct usb_interface *iface);
+extern int wa_create(struct wahc *wa, struct usb_interface *iface,
+	kernel_ulong_t);
 extern void __wa_destroy(struct wahc *wa);
+extern int wa_dti_start(struct wahc *wa);
 void wa_reset_all(struct wahc *wa);
 
 
@@ -232,21 +284,32 @@
 /* RPipes */
 static inline void wa_rpipe_init(struct wahc *wa)
 {
-	spin_lock_init(&wa->rpipe_bm_lock);
+	INIT_LIST_HEAD(&wa->rpipe_delayed_list);
+	spin_lock_init(&wa->rpipe_lock);
 	mutex_init(&wa->rpipe_mutex);
 }
 
 static inline void wa_init(struct wahc *wa)
 {
+	int index;
+
 	edc_init(&wa->nep_edc);
 	atomic_set(&wa->notifs_queued, 0);
+	wa->dti_state = WA_DTI_TRANSFER_RESULT_PENDING;
 	wa_rpipe_init(wa);
 	edc_init(&wa->dti_edc);
 	INIT_LIST_HEAD(&wa->xfer_list);
 	INIT_LIST_HEAD(&wa->xfer_delayed_list);
+	INIT_LIST_HEAD(&wa->xfer_errored_list);
 	spin_lock_init(&wa->xfer_list_lock);
-	INIT_WORK(&wa->xfer_work, wa_urb_enqueue_run);
+	INIT_WORK(&wa->xfer_enqueue_work, wa_urb_enqueue_run);
+	INIT_WORK(&wa->xfer_error_work, wa_process_errored_transfers_run);
+	wa->dto_in_use = 0;
 	atomic_set(&wa->xfer_id_count, 1);
+	/* init the buf in URBs */
+	for (index = 0; index < WA_MAX_BUF_IN_URBS; ++index)
+		usb_init_urb(&(wa->buf_in_urbs[index]));
+	wa->active_buf_in_urbs = 0;
 }
 
 /**
@@ -269,6 +332,8 @@
 
 }
 extern void rpipe_ep_disable(struct wahc *, struct usb_host_endpoint *);
+extern void rpipe_clear_feature_stalled(struct wahc *,
+			struct usb_host_endpoint *);
 extern int wa_rpipes_create(struct wahc *);
 extern void wa_rpipes_destroy(struct wahc *);
 static inline void rpipe_avail_dec(struct wa_rpipe *rpipe)
@@ -289,7 +354,7 @@
 /* Transferring data */
 extern int wa_urb_enqueue(struct wahc *, struct usb_host_endpoint *,
 			  struct urb *, gfp_t);
-extern int wa_urb_dequeue(struct wahc *, struct urb *);
+extern int wa_urb_dequeue(struct wahc *, struct urb *, int);
 extern void wa_handle_notif_xfer(struct wahc *, struct wa_notif_hdr *);
 
 
@@ -302,7 +367,7 @@
  *        it...no RC specific function is called...unless I miss
  *        something.
  *
- * FIXME: has to go away in favour of an 'struct' hcd based sollution
+ * FIXME: has to go away in favour of a 'struct' hcd based solution
  */
 static inline struct wahc *wa_get(struct wahc *wa)
 {
@@ -323,7 +388,7 @@
 			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 			feature,
 			wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-			NULL, 0, 1000 /* FIXME: arbitrary */);
+			NULL, 0, USB_CTRL_SET_TIMEOUT);
 }
 
 
@@ -357,8 +422,7 @@
 		USB_REQ_GET_STATUS,
 		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 		0, wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
-		&wa->status, sizeof(wa->status),
-		1000 /* FIXME: arbitrary */);
+		&wa->status, sizeof(wa->status), USB_CTRL_GET_TIMEOUT);
 	if (result >= 0)
 		result = wa->status;
 	return result;