1 files changed, 180 insertions, 54 deletions

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 6edf4097d2d2..240c7f507541 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -81,7 +81,6 @@ static void ohci_dump (struct ohci_hcd *ohci, int verbose);
 static int ohci_init (struct ohci_hcd *ohci);
 static void ohci_stop (struct usb_hcd *hcd);
 static int ohci_restart (struct ohci_hcd *ohci);
-static void ohci_quirk_nec_worker (struct work_struct *work);
 
 #include "ohci-hub.c"
 #include "ohci-dbg.c"
@@ -118,7 +117,6 @@ MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
  */
 static int ohci_urb_enqueue (
 	struct usb_hcd	*hcd,
-	struct usb_host_endpoint *ep,
 	struct urb	*urb,
 	gfp_t		mem_flags
 ) {
@@ -131,11 +129,11 @@ static int ohci_urb_enqueue (
 	int		retval = 0;
 
 #ifdef OHCI_VERBOSE_DEBUG
-	urb_print (urb, "SUB", usb_pipein (pipe));
+	urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
 #endif
 
 	/* every endpoint has a ed, locate and maybe (re)initialize it */
-	if (! (ed = ed_get (ohci, ep, urb->dev, pipe, urb->interval)))
+	if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
 		return -ENOMEM;
 
 	/* for the private part of the URB we need the number of TDs (size) */
@@ -200,22 +198,17 @@ static int ohci_urb_enqueue (
 		retval = -ENODEV;
 		goto fail;
 	}
-
-	/* in case of unlink-during-submit */
-	spin_lock (&urb->lock);
-	if (urb->status != -EINPROGRESS) {
-		spin_unlock (&urb->lock);
-		urb->hcpriv = urb_priv;
-		finish_urb (ohci, urb);
-		retval = 0;
+	retval = usb_hcd_link_urb_to_ep(hcd, urb);
+	if (retval)
 		goto fail;
-	}
 
 	/* schedule the ed if needed */
 	if (ed->state == ED_IDLE) {
 		retval = ed_schedule (ohci, ed);
-		if (retval < 0)
-			goto fail0;
+		if (retval < 0) {
+			usb_hcd_unlink_urb_from_ep(hcd, urb);
+			goto fail;
+		}
 		if (ed->type == PIPE_ISOCHRONOUS) {
 			u16	frame = ohci_frame_no(ohci);
 
@@ -239,8 +232,6 @@ static int ohci_urb_enqueue (
 	urb->hcpriv = urb_priv;
 	td_submit_urb (ohci, urb);
 
-fail0:
-	spin_unlock (&urb->lock);
 fail:
 	if (retval)
 		urb_free_priv (ohci, urb_priv);
@@ -249,22 +240,26 @@ fail:
 }
 
 /*
- * decouple the URB from the HC queues (TDs, urb_priv); it's
- * already marked using urb->status.  reporting is always done
+ * decouple the URB from the HC queues (TDs, urb_priv).
+ * reporting is always done
  * asynchronously, and we might be dealing with an urb that's
  * partially transferred, or an ED with other urbs being unlinked.
  */
-static int ohci_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
+static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
 	unsigned long		flags;
+	int			rc;
 
 #ifdef OHCI_VERBOSE_DEBUG
-	urb_print (urb, "UNLINK", 1);
+	urb_print(urb, "UNLINK", 1, status);
 #endif
 
 	spin_lock_irqsave (&ohci->lock, flags);
-	if (HC_IS_RUNNING(hcd->state)) {
+	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (rc) {
+		;	/* Do nothing */
+	} else if (HC_IS_RUNNING(hcd->state)) {
 		urb_priv_t  *urb_priv;
 
 		/* Unless an IRQ completed the unlink while it was being
@@ -282,10 +277,10 @@ static int ohci_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
 		 * any more ... just clean up every urb's memory.
 		 */
 		if (urb->hcpriv)
-			finish_urb (ohci, urb);
+			finish_urb(ohci, urb, status);
 	}
 	spin_unlock_irqrestore (&ohci->lock, flags);
-	return 0;
+	return rc;
 }
 
 /*-------------------------------------------------------------------------*/
@@ -314,6 +309,8 @@ rescan:
 	if (!HC_IS_RUNNING (hcd->state)) {
 sanitize:
 		ed->state = ED_IDLE;
+		if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
+			ohci->eds_scheduled--;
 		finish_unlinks (ohci, 0);
 	}
 
@@ -321,7 +318,12 @@ sanitize:
 	case ED_UNLINK:		/* wait for hw to finish? */
 		/* major IRQ delivery trouble loses INTR_SF too... */
 		if (limit-- == 0) {
-			ohci_warn (ohci, "IRQ INTR_SF lossage\n");
+			ohci_warn(ohci, "ED unlink timeout\n");
+			if (quirk_zfmicro(ohci)) {
+				ohci_warn(ohci, "Attempting ZF TD recovery\n");
+				ohci->ed_to_check = ed;
+				ohci->zf_delay = 2;
+			}
 			goto sanitize;
 		}
 		spin_unlock_irqrestore (&ohci->lock, flags);
@@ -379,6 +381,93 @@ ohci_shutdown (struct usb_hcd *hcd)
 	(void) ohci_readl (ohci, &ohci->regs->control);
 }
 
+static int check_ed(struct ohci_hcd *ohci, struct ed *ed)
+{
+	return (hc32_to_cpu(ohci, ed->hwINFO) & ED_IN) != 0
+		&& (hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK)
+			== (hc32_to_cpu(ohci, ed->hwTailP) & TD_MASK)
+		&& !list_empty(&ed->td_list);
+}
+
+/* ZF Micro watchdog timer callback. The ZF Micro chipset sometimes completes
+ * an interrupt TD but neglects to add it to the donelist.  On systems with
+ * this chipset, we need to periodically check the state of the queues to look
+ * for such "lost" TDs.
+ */
+static void unlink_watchdog_func(unsigned long _ohci)
+{
+	long		flags;
+	unsigned	max;
+	unsigned	seen_count = 0;
+	unsigned	i;
+	struct ed	**seen = NULL;
+	struct ohci_hcd	*ohci = (struct ohci_hcd *) _ohci;
+
+	spin_lock_irqsave(&ohci->lock, flags);
+	max = ohci->eds_scheduled;
+	if (!max)
+		goto done;
+
+	if (ohci->ed_to_check)
+		goto out;
+
+	seen = kcalloc(max, sizeof *seen, GFP_ATOMIC);
+	if (!seen)
+		goto out;
+
+	for (i = 0; i < NUM_INTS; i++) {
+		struct ed	*ed = ohci->periodic[i];
+
+		while (ed) {
+			unsigned	temp;
+
+			/* scan this branch of the periodic schedule tree */
+			for (temp = 0; temp < seen_count; temp++) {
+				if (seen[temp] == ed) {
+					/* we've checked it and what's after */
+					ed = NULL;
+					break;
+				}
+			}
+			if (!ed)
+				break;
+			seen[seen_count++] = ed;
+			if (!check_ed(ohci, ed)) {
+				ed = ed->ed_next;
+				continue;
+			}
+
+			/* HC's TD list is empty, but HCD sees at least one
+			 * TD that's not been sent through the donelist.
+			 */
+			ohci->ed_to_check = ed;
+			ohci->zf_delay = 2;
+
+			/* The HC may wait until the next frame to report the
+			 * TD as done through the donelist and INTR_WDH.  (We
+			 * just *assume* it's not a multi-TD interrupt URB;
+			 * those could defer the IRQ more than one frame, using
+			 * DI...)  Check again after the next INTR_SF.
+			 */
+			ohci_writel(ohci, OHCI_INTR_SF,
+					&ohci->regs->intrstatus);
+			ohci_writel(ohci, OHCI_INTR_SF,
+					&ohci->regs->intrenable);
+
+			/* flush those writes */
+			(void) ohci_readl(ohci, &ohci->regs->control);
+
+			goto out;
+		}
+	}
+out:
+	kfree(seen);
+	if (ohci->eds_scheduled)
+		mod_timer(&ohci->unlink_watchdog, round_jiffies_relative(HZ));
+done:
+	spin_unlock_irqrestore(&ohci->lock, flags);
+}
+
 /*-------------------------------------------------------------------------*
  * HC functions
  *-------------------------------------------------------------------------*/
@@ -616,6 +705,15 @@ retry:
 	mdelay ((temp >> 23) & 0x1fe);
 	hcd->state = HC_STATE_RUNNING;
 
+	if (quirk_zfmicro(ohci)) {
+		/* Create timer to watch for bad queue state on ZF Micro */
+		setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
+				(unsigned long) ohci);
+
+		ohci->eds_scheduled = 0;
+		ohci->ed_to_check = NULL;
+	}
+
 	ohci_dump (ohci, 1);
 
 	return 0;
@@ -629,10 +727,11 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 {
 	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
 	struct ohci_regs __iomem *regs = ohci->regs;
- 	int			ints; 
+	int			ints;
 
 	/* we can eliminate a (slow) ohci_readl()
-	   if _only_ WDH caused this irq */
+	 * if _only_ WDH caused this irq
+	 */
 	if ((ohci->hcca->done_head != 0)
 			&& ! (hc32_to_cpup (ohci, &ohci->hcca->done_head)
 				& 0x01)) {
@@ -651,7 +750,7 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 
 	if (ints & OHCI_INTR_UE) {
 		// e.g. due to PCI Master/Target Abort
-		if (ohci->flags & OHCI_QUIRK_NEC) {
+		if (quirk_nec(ohci)) {
 			/* Workaround for a silicon bug in some NEC chips used
 			 * in Apple's PowerBooks. Adapted from Darwin code.
 			 */
@@ -713,6 +812,31 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 			ohci_writel (ohci, OHCI_INTR_WDH, &regs->intrenable);
 	}
 
+	if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
+		spin_lock(&ohci->lock);
+		if (ohci->ed_to_check) {
+			struct ed *ed = ohci->ed_to_check;
+
+			if (check_ed(ohci, ed)) {
+				/* HC thinks the TD list is empty; HCD knows
+				 * at least one TD is outstanding
+				 */
+				if (--ohci->zf_delay == 0) {
+					struct td *td = list_entry(
+						ed->td_list.next,
+						struct td, td_list);
+					ohci_warn(ohci,
+						  "Reclaiming orphan TD %p\n",
+						  td);
+					takeback_td(ohci, td);
+					ohci->ed_to_check = NULL;
+				}
+			} else
+				ohci->ed_to_check = NULL;
+		}
+		spin_unlock(&ohci->lock);
+	}
+
 	/* could track INTR_SO to reduce available PCI/... bandwidth */
 
 	/* handle any pending URB/ED unlinks, leaving INTR_SF enabled
@@ -721,7 +845,9 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 	spin_lock (&ohci->lock);
 	if (ohci->ed_rm_list)
 		finish_unlinks (ohci, ohci_frame_no(ohci));
-	if ((ints & OHCI_INTR_SF) != 0 && !ohci->ed_rm_list
+	if ((ints & OHCI_INTR_SF) != 0
+			&& !ohci->ed_rm_list
+			&& !ohci->ed_to_check
 			&& HC_IS_RUNNING(hcd->state))
 		ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
 	spin_unlock (&ohci->lock);
@@ -751,6 +877,9 @@ static void ohci_stop (struct usb_hcd *hcd)
 	free_irq(hcd->irq, hcd);
 	hcd->irq = -1;
 
+	if (quirk_zfmicro(ohci))
+		del_timer(&ohci->unlink_watchdog);
+
 	remove_debug_files (ohci);
 	ohci_mem_cleanup (ohci);
 	if (ohci->hcca) {
@@ -798,9 +927,8 @@ static int ohci_restart (struct ohci_hcd *ohci)
 					ed, ed->state);
 		}
 
-		spin_lock (&urb->lock);
-		urb->status = -ESHUTDOWN;
-		spin_unlock (&urb->lock);
+		if (!urb->unlinked)
+			urb->unlinked = -ESHUTDOWN;
 	}
 	finish_unlinks (ohci, 0);
 	spin_unlock_irq(&ohci->lock);
@@ -828,27 +956,6 @@ static int ohci_restart (struct ohci_hcd *ohci)
 
 /*-------------------------------------------------------------------------*/
 
-/* NEC workaround */
-static void ohci_quirk_nec_worker(struct work_struct *work)
-{
-	struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
-	int status;
-
-	status = ohci_init(ohci);
-	if (status != 0) {
-		ohci_err(ohci, "Restarting NEC controller failed "
-			 "in ohci_init, %d\n", status);
-		return;
-	}
-
-	status = ohci_restart(ohci);
-	if (status != 0)
-		ohci_err(ohci, "Restarting NEC controller failed "
-			 "in ohci_restart, %d\n", status);
-}
-
-/*-------------------------------------------------------------------------*/
-
 #define DRIVER_INFO DRIVER_VERSION " " DRIVER_DESC
 
 MODULE_AUTHOR (DRIVER_AUTHOR);
@@ -926,11 +1033,17 @@ MODULE_LICENSE ("GPL");
 #define PS3_SYSTEM_BUS_DRIVER	ps3_ohci_driver
 #endif
 
+#ifdef CONFIG_USB_OHCI_HCD_SSB
+#include "ohci-ssb.c"
+#define SSB_OHCI_DRIVER		ssb_ohci_driver
+#endif
+
 #if	!defined(PCI_DRIVER) &&		\
 	!defined(PLATFORM_DRIVER) &&	\
 	!defined(OF_PLATFORM_DRIVER) &&	\
 	!defined(SA1111_DRIVER) &&	\
-	!defined(PS3_SYSTEM_BUS_DRIVER)
+	!defined(PS3_SYSTEM_BUS_DRIVER) && \
+	!defined(SSB_OHCI_DRIVER)
 #error "missing bus glue for ohci-hcd"
 #endif
 
@@ -975,10 +1088,20 @@ static int __init ohci_hcd_mod_init(void)
 		goto error_pci;
 #endif
 
+#ifdef SSB_OHCI_DRIVER
+	retval = ssb_driver_register(&SSB_OHCI_DRIVER);
+	if (retval)
+		goto error_ssb;
+#endif
+
 	return retval;
 
 	/* Error path */
+#ifdef SSB_OHCI_DRIVER
+ error_ssb:
+#endif
 #ifdef PCI_DRIVER
+	pci_unregister_driver(&PCI_DRIVER);
  error_pci:
 #endif
 #ifdef SA1111_DRIVER
@@ -1003,6 +1126,9 @@ module_init(ohci_hcd_mod_init);
 
 static void __exit ohci_hcd_mod_exit(void)
 {
+#ifdef SSB_OHCI_DRIVER
+	ssb_driver_unregister(&SSB_OHCI_DRIVER);
+#endif
 #ifdef PCI_DRIVER
 	pci_unregister_driver(&PCI_DRIVER);
 #endif