Merge bk://kernel.bkbits.net/gregkh/linux/linus-2.5

into penguin.transmeta.com:/home/torvalds/v2.5/linux

drivers/usb/core/message.c

@@ -672,6 +672,7 @@ void usb_set_maxpacket(struct usb_device *dev)
 {
 	int i, b;
 
+	/* NOTE:  affects all endpoints _except_ ep0 */
 	for (i=0; i<dev->actconfig->desc.bNumInterfaces; i++) {
 		struct usb_interface *ifp = dev->actconfig->interface + i;
 		struct usb_host_interface *as = ifp->altsetting + ifp->act_altsetting;
@@ -862,6 +863,7 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
 		usb_settoggle (dev, ep, out, 0);
 		(out ? dev->epmaxpacketout : dev->epmaxpacketin) [ep]
 			= iface_as->endpoint [i].desc.wMaxPacketSize;
+		usb_endpoint_running (dev, ep, out);
 	}
 
 	return 0;
@@ -916,7 +918,7 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
 
 	/* if it's already configured, clear out old state first. */
 	if (dev->state != USB_STATE_ADDRESS && disable) {
-		for (i = 0; i < 15; i++) {
+		for (i = 1 /* skip ep0 */; i < 15; i++) {
 			disable (dev, i);
 			disable (dev, USB_DIR_IN | i);
 		}

drivers/usb/gadget/ether.c

@@ -1107,7 +1107,7 @@ eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 	}
 
 	/* respond with data transfer before status phase? */
-	if (value > 0) {
+	if (value >= 0) {
 		req->length = value;
 		value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
 		if (value < 0) {

drivers/usb/gadget/net2280.c

@@ -393,7 +393,7 @@ net2280_free_request (struct usb_ep *_ep, struct usb_request *_req)
 	struct net2280_request	*req;
 
 	ep = container_of (_ep, struct net2280_ep, ep);
-	if (!ep || !_req)
+	if (!_ep || !_req)
 		return;
 
 	req = container_of (_req, struct net2280_request, req);
@@ -442,7 +442,7 @@ net2280_alloc_buffer (
 	struct net2280_ep	*ep;
 
 	ep = container_of (_ep, struct net2280_ep, ep);
-	if (!ep || (!ep->desc && ep->num != 0))
+	if (!_ep || (!ep->desc && ep->num != 0))
 		return 0;
 
 	*dma = DMA_ADDR_INVALID;
@@ -561,16 +561,12 @@ static void out_flush (struct net2280_ep *ep)
 	writel ((1 << FIFO_FLUSH), statp);
 	mb ();
 	tmp = readl (statp);
-	if (tmp & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) {
+	if (tmp & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)
+			/* high speed did bulk NYET; fifo isn't filling */
+			&& ep->dev->gadget.speed == USB_SPEED_FULL) {
 		unsigned	usec;
 
-		if (ep->dev->gadget.speed == USB_SPEED_HIGH) {
-			if (ep->ep.maxpacket <= 512)
-				usec = 10;	/* 512 byte bulk */
-			else
-				usec = 21;	/* 1024 byte interrupt */
-		} else
-			usec = 50;		/* 64 byte bulk/interrupt */
+		usec = 50;		/* 64 byte bulk/interrupt */
 		handshake (statp, (1 << USB_OUT_PING_NAK_SENT),
 				(1 << USB_OUT_PING_NAK_SENT), usec);
 		/* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */
@@ -614,15 +610,13 @@ read_fifo (struct net2280_ep *ep, struct net2280_request *req)
 	count = readl (&regs->ep_avail);
 	tmp = req->req.length - req->req.actual;
 	if (count > tmp) {
-		unsigned	over = tmp % ep->ep.maxpacket;
-
-		/* FIXME handle this consistently between PIO and DMA */
-		if (over) {
+		/* as with DMA, data overflow gets flushed */
+		if ((tmp % ep->ep.maxpacket) != 0) {
 			ERROR (ep->dev,
-				"%s out fifo %d bytes, over %d extra %d\n",
-				ep->ep.name, count, over, count - tmp);
+				"%s out fifo %d bytes, expected %d\n",
+				ep->ep.name, count, tmp);
 			req->req.status = -EOVERFLOW;
-			tmp -= over;
+			cleanup = 1;
 		}
 		count = tmp;
 	}
@@ -670,10 +664,12 @@ fill_dma_desc (struct net2280_ep *ep, struct net2280_request *req, int valid)
 
 	/* don't let DMA continue after a short OUT packet,
 	 * so overruns can't affect the next transfer.
+	 * in case of overruns on max-size packets, we can't
+	 * stop the fifo from filling but we can flush it.
 	 */
 	if (ep->is_in)
 		dmacount |= (1 << DMA_DIRECTION);
-	else if ((dmacount % ep->ep.maxpacket) != 0)
+	else
 		dmacount |= (1 << END_OF_CHAIN);
 
 	req->valid = valid;
@@ -897,8 +893,12 @@ net2280_queue (struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
 			start_dma (ep, req);
 		else {
 			/* maybe there's no control data, just status ack */
-			if (ep->num == 0 && _req->length == 0)
+			if (ep->num == 0 && _req->length == 0) {
+				allow_status (ep);
+				done (ep, req, 0);
+				VDEBUG (dev, "%s status ack\n", ep->ep.name);
 				goto done;
+			}
 
 			/* PIO ... stuff the fifo, or unblock it.  */
 			if (ep->is_in)
@@ -948,10 +948,9 @@ net2280_queue (struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
 
 	} /* else the irq handler advances the queue. */
 
-	if (req) {
-done:
+	if (req)
 		list_add_tail (&req->queue, &ep->queue);
-	}
+done:
 	spin_unlock_irqrestore (&dev->lock, flags);
 
 	/* pci writes may still be posted */
@@ -992,6 +991,8 @@ static void scan_dma_completions (struct net2280_ep *ep)
 		/* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short"
 		 * packets, including overruns, even when the transfer was
 		 * exactly the length requested (dmacount now zero).
+		 * FIXME there's an overrun case here too, where we expect
+		 * a short packet but receive a max length one (won't NAK).
 		 */
 		if (!ep->is_in && (req->req.length % ep->ep.maxpacket) != 0) {
 			req->dma_done = 1;
@@ -1186,7 +1187,8 @@ net2280_set_halt (struct usb_ep *_ep, int value)
 		return -EINVAL;
 	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;
-	if ((ep->desc->bmAttributes & 0x03) == USB_ENDPOINT_XFER_ISOC)
+	if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03)
+						== USB_ENDPOINT_XFER_ISOC)
 		return -EINVAL;
 
 	VDEBUG (ep->dev, "%s %s halt\n", _ep->name, value ? "set" : "clear");
@@ -1712,7 +1714,7 @@ static void usb_reinit (struct net2280 *dev)
 
 static void ep0_start (struct net2280 *dev)
 {
-	writel (  (1 << SET_EP_HIDE_STATUS_PHASE)
+	writel (  (1 << CLEAR_EP_HIDE_STATUS_PHASE)
 		| (1 << CLEAR_NAK_OUT_PACKETS)
 		| (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
 		, &dev->epregs [0].ep_rsp);
@@ -1916,22 +1918,27 @@ static void handle_ep_small (struct net2280_ep *ep)
 		if (ep->is_in) {
 			/* status; stop NAKing */
 			if (t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) {
-				if (ep->dev->protocol_stall)
+				if (ep->dev->protocol_stall) {
+					ep->stopped = 1;
 					set_halt (ep);
+				}
 				mode = 2;
-			/* reply to extra IN tokens with a zlp */
+			/* reply to extra IN data tokens with a zlp */
 			} else if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) {
 				if (ep->dev->protocol_stall) {
+					ep->stopped = 1;
 					set_halt (ep);
 					mode = 2;
-				} else if (!req)
+				} else if (!req && ep->stopped)
 					write_fifo (ep, 0);
 			}
 		} else {
 			/* status; stop NAKing */
 			if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) {
-				if (ep->dev->protocol_stall)
+				if (ep->dev->protocol_stall) {
+					ep->stopped = 1;
 					set_halt (ep);
+				}
 				mode = 2;
 			/* an extra OUT token is an error */
 			} else if (((t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT))
@@ -2031,6 +2038,10 @@ static void handle_ep_small (struct net2280_ep *ep)
 
 		/* maybe advance queue to next request */
 		if (ep->num == 0) {
+			/* FIXME need mechanism (request flag?) so control OUT
+			 * can decide to stall ep0 after that done() returns,
+			 * from non-irq context
+			 */
 			allow_status (ep);
 			req = 0;
 		} else {
@@ -2171,6 +2182,7 @@ static void handle_stat0_irqs (struct net2280 *dev, u32 stat)
 			struct net2280_ep	*e;
 			u16			status;
 
+			/* hw handles device and interface status */
 			if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
 				goto delegate;
 			if ((e = get_ep_by_addr (dev, u.r.wIndex)) == 0
@@ -2188,12 +2200,14 @@ static void handle_stat0_irqs (struct net2280 *dev, u32 stat)
 			set_fifo_bytecount (ep, u.r.wLength);
 			writel (status, &dev->epregs [0].ep_data);
 			allow_status (ep);
+			VDEBUG (dev, "%s stat %02x\n", ep->ep.name, status);
 			goto next_endpoints;
 			}
 			break;
 		case USB_REQ_CLEAR_FEATURE: {
 			struct net2280_ep	*e;
 
+			/* hw handles device features */
 			if (u.r.bRequestType != USB_RECIP_ENDPOINT)
 				goto delegate;
 			if (u.r.wIndex != 0 /* HALT feature */
@@ -2202,11 +2216,15 @@ static void handle_stat0_irqs (struct net2280 *dev, u32 stat)
 			if ((e = get_ep_by_addr (dev, u.r.wIndex)) == 0)
 				goto do_stall;
 			clear_halt (e);
+			allow_status (ep);
+			VDEBUG (dev, "%s clear halt\n", ep->ep.name);
+			goto next_endpoints;
 			}
 			break;
 		case USB_REQ_SET_FEATURE: {
 			struct net2280_ep	*e;
 
+			/* hw handles device features */
 			if (u.r.bRequestType != USB_RECIP_ENDPOINT)
 				goto delegate;
 			if (u.r.wIndex != 0 /* HALT feature */
@@ -2215,6 +2233,9 @@ static void handle_stat0_irqs (struct net2280 *dev, u32 stat)
 			if ((e = get_ep_by_addr (dev, u.r.wIndex)) == 0)
 				goto do_stall;
 			set_halt (e);
+			allow_status (ep);
+			VDEBUG (dev, "%s set halt\n", ep->ep.name);
+			goto next_endpoints;
 			}
 			break;
 		default:
@@ -2235,23 +2256,12 @@ static void handle_stat0_irqs (struct net2280 *dev, u32 stat)
 			VDEBUG (dev, "req %02x.%02x protocol STALL; stat %d\n",
 					u.r.bRequestType, u.r.bRequest, tmp);
 			dev->protocol_stall = 1;
-
-		/* when there's no data, queueing a response is optional */
-		} else if (list_empty (&ep->queue)) {
-			if (u.r.wLength == 0) {
-				/* done() not possible/requested */
-				allow_status (ep);
-			} else {
-				DEBUG (dev, "req %02x.%02x v%04x "
-					"gadget error, len %d, stat %d\n",
-					u.r.bRequestType, u.r.bRequest,
-					le16_to_cpu (u.r.wValue),
-					u.r.wLength, tmp);
-				dev->protocol_stall = 1;
-			}
 		}
 
-		/* some in/out token irq should follow; maybe stall then. */
+		/* some in/out token irq should follow; maybe stall then.
+		 * driver must queue a request (even zlp) or halt ep0
+		 * before the host times out.
+		 */
 	}
 
 next_endpoints:

drivers/usb/gadget/net2280.h

@@ -437,6 +437,8 @@ struct net2280_ep_regs {	/* [11.9] */
 
 /*-------------------------------------------------------------------------*/
 
+#ifdef	__KERNEL__
+
 /* indexed registers [11.10] are accessed indirectly
  * caller must own the device lock.
  */
@@ -457,6 +459,9 @@ set_idx_reg (struct net2280_regs *regs, u32 index, u32 value)
 	/* posted, may not be visible yet */
 }
 
+#endif	/* __KERNEL__ */
+
+
 #define REG_DIAG		0x0
 #define     RETRY_COUNTER                                       16
 #define     FORCE_PCI_SERR                                      11
@@ -471,6 +476,8 @@ set_idx_reg (struct net2280_regs *regs, u32 index, u32 value)
 #define REG_CHIPREV		0x03	/* in bcd */
 #define	REG_HS_NAK_RATE		0x0a	/* NAK per N uframes */
 
+#ifdef	__KERNEL__
+
 /* ep a-f highspeed and fullspeed maxpacket, addresses
  * computed from ep->num
  */
@@ -519,6 +526,7 @@ static inline void allow_status (struct net2280_ep *ep)
 	writel (  (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
 		| (1 << CLEAR_NAK_OUT_PACKETS_MODE)
 		, &ep->regs->ep_rsp);
+	ep->stopped = 1;
 }
 
 static inline void set_halt (struct net2280_ep *ep)
@@ -707,3 +715,4 @@ static inline void stop_out_naking (struct net2280_ep *ep)
 		writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
 }
 
+#endif	/* __KERNEL__ */

drivers/usb/gadget/zero.c

@@ -653,7 +653,7 @@ static void source_sink_complete (struct usb_ep *ep, struct usb_request *req)
 	/* this endpoint is normally active while we're configured */
 	case -ECONNRESET:		/* request dequeued */
 	case -ESHUTDOWN:		/* disconnect from host */
-		DEBUG (dev, "%s gone (%d), %d/%d\n", ep->name, status,
+		VDEBUG (dev, "%s gone (%d), %d/%d\n", ep->name, status,
 				req->actual, req->length);
 		free_ep_req (ep, req);
 		return;
@@ -1035,9 +1035,6 @@ zero_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 		if (ctrl->bRequestType != 0)
 			break;
 		spin_lock (&dev->lock);
-		/* change hardware configuration!
-		 * no response queued, just zero status == success
-		 */
 		value = zero_set_config (dev, ctrl->wValue, GFP_ATOMIC);
 		spin_unlock (&dev->lock);
 		break;
@@ -1092,7 +1089,7 @@ zero_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 	}
 
 	/* respond with data transfer before status phase? */
-	if (value > 0) {
+	if (value >= 0) {
 		req->length = value;
 		value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
 		if (value < 0) {

drivers/usb/host/uhci-hcd.c

@@ -61,7 +61,7 @@
 /*
  * Version Information
  */
-#define DRIVER_VERSION "v2.0"
+#define DRIVER_VERSION "v2.1"
 #define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber"
 #define DRIVER_DESC "USB Universal Host Controller Interface driver"
 
@@ -91,9 +91,7 @@ static int uhci_get_current_frame_number(struct uhci_hcd *uhci);
 static int uhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb);
 static void uhci_unlink_generic(struct uhci_hcd *uhci, struct urb *urb);
 
-static int  ports_active(struct uhci_hcd *uhci);
-static void suspend_hc(struct uhci_hcd *uhci);
-static void wakeup_hc(struct uhci_hcd *uhci);
+static void hc_state_transitions(struct uhci_hcd *uhci);
 
 /* If a transfer is still active after this much time, turn off FSBR */
 #define IDLE_TIMEOUT	(HZ / 20)	/* 50 ms */
@@ -1757,9 +1755,8 @@ static void stall_callback(unsigned long ptr)
 		uhci->skel_term_qh->link = UHCI_PTR_TERM;
 	}
 
-	/* enter global suspend if nothing connected */
-	if (!uhci->is_suspended && !ports_active(uhci))
-		suspend_hc(uhci);
+	/* Poll for and perform state transitions */
+	hc_state_transitions(uhci);
 
 	init_stall_timer(hcd);
 }
@@ -1884,14 +1881,14 @@ static void uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
 			err("%x: host system error, PCI problems?", io_addr);
 		if (status & USBSTS_HCPE)
 			err("%x: host controller process error. something bad happened", io_addr);
-		if ((status & USBSTS_HCH) && !uhci->is_suspended) {
+		if ((status & USBSTS_HCH) && uhci->state > 0) {
 			err("%x: host controller halted. very bad", io_addr);
 			/* FIXME: Reset the controller, fix the offending TD */
 		}
 	}
 
 	if (status & USBSTS_RD)
-		wakeup_hc(uhci);
+		uhci->resume_detect = 1;
 
 	uhci_free_pending_qhs(uhci);
 
@@ -1922,10 +1919,18 @@ static void reset_hc(struct uhci_hcd *uhci)
 	unsigned int io_addr = uhci->io_addr;
 
 	/* Global reset for 50ms */
+	uhci->state = UHCI_RESET;
 	outw(USBCMD_GRESET, io_addr + USBCMD);
-	wait_ms(50);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout((HZ*50+999) / 1000);
+	set_current_state(TASK_RUNNING);
 	outw(0, io_addr + USBCMD);
-	wait_ms(10);
+
+	/* Another 10ms delay */
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout((HZ*10+999) / 1000);
+	set_current_state(TASK_RUNNING);
+	uhci->resume_detect = 0;
 }
 
 static void suspend_hc(struct uhci_hcd *uhci)
@@ -1933,34 +1938,49 @@ static void suspend_hc(struct uhci_hcd *uhci)
 	unsigned int io_addr = uhci->io_addr;
 
 	dbg("%x: suspend_hc", io_addr);
-
-	uhci->is_suspended = 1;
-	smp_wmb();
-
+	uhci->state = UHCI_SUSPENDED;
+	uhci->resume_detect = 0;
 	outw(USBCMD_EGSM, io_addr + USBCMD);
 }
 
 static void wakeup_hc(struct uhci_hcd *uhci)
 {
 	unsigned int io_addr = uhci->io_addr;
-	unsigned int status;
 
-	dbg("%x: wakeup_hc", io_addr);
+	switch (uhci->state) {
+		case UHCI_SUSPENDED:		/* Start the resume */
+			dbg("%x: wakeup_hc", io_addr);
 
-	/* Global resume for 20ms */
-	outw(USBCMD_FGR | USBCMD_EGSM, io_addr + USBCMD);
-	wait_ms(20);
-	outw(0, io_addr + USBCMD);
-	
-	/* wait for EOP to be sent */
-	status = inw(io_addr + USBCMD);
-	while (status & USBCMD_FGR)
-		status = inw(io_addr + USBCMD);
+			/* Global resume for >= 20ms */
+			outw(USBCMD_FGR | USBCMD_EGSM, io_addr + USBCMD);
+			uhci->state = UHCI_RESUMING_1;
+			uhci->state_end = jiffies + (20*HZ+999) / 1000;
+			break;
 
-	uhci->is_suspended = 0;
+		case UHCI_RESUMING_1:		/* End global resume */
+			uhci->state = UHCI_RESUMING_2;
+			outw(0, io_addr + USBCMD);
+			/* Falls through */
 
-	/* Run and mark it configured with a 64-byte max packet */
-	outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
+		case UHCI_RESUMING_2:		/* Wait for EOP to be sent */
+			if (inw(io_addr + USBCMD) & USBCMD_FGR)
+				break;
+
+			/* Run for at least 1 second, and
+			 * mark it configured with a 64-byte max packet */
+			uhci->state = UHCI_RUNNING_GRACE;
+			uhci->state_end = jiffies + HZ;
+			outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP,
+					io_addr + USBCMD);
+			break;
+
+		case UHCI_RUNNING_GRACE:	/* Now allowed to suspend */
+			uhci->state = UHCI_RUNNING;
+			break;
+
+		default:
+			break;
+	}
 }
 
 static int ports_active(struct uhci_hcd *uhci)
@@ -1975,6 +1995,73 @@ static int ports_active(struct uhci_hcd *uhci)
 	return connection;
 }
 
+static int suspend_allowed(struct uhci_hcd *uhci)
+{
+	unsigned int io_addr = uhci->io_addr;
+	int i;
+
+	if (!uhci->hcd.pdev ||
+	     uhci->hcd.pdev->vendor != PCI_VENDOR_ID_INTEL ||
+	     uhci->hcd.pdev->device != PCI_DEVICE_ID_INTEL_82371AB_2)
+		return 1;
+
+	/* This is a 82371AB/EB/MB USB controller which has a bug that
+	 * causes false resume indications if any port has an
+	 * over current condition.  To prevent problems, we will not
+	 * allow a global suspend if any ports are OC.
+	 *
+	 * Some motherboards using the 82371AB/EB/MB (but not the USB portion)
+	 * appear to hardwire the over current inputs active to disable
+	 * the USB ports.
+	 */
+
+	/* check for over current condition on any port */
+	for (i = 0; i < uhci->rh_numports; i++) {
+		if (inw(io_addr + USBPORTSC1 + i * 2) & USBPORTSC_OC)
+			return 0;
+	}
+
+	return 1;
+}
+
+static void hc_state_transitions(struct uhci_hcd *uhci)
+{
+	switch (uhci->state) {
+		case UHCI_RUNNING:
+
+			/* global suspend if nothing connected for 1 second */
+			if (!ports_active(uhci) && suspend_allowed(uhci)) {
+				uhci->state = UHCI_SUSPENDING_GRACE;
+				uhci->state_end = jiffies + HZ;
+			}
+			break;
+
+		case UHCI_SUSPENDING_GRACE:
+			if (ports_active(uhci))
+				uhci->state = UHCI_RUNNING;
+			else if (time_after_eq(jiffies, uhci->state_end))
+				suspend_hc(uhci);
+			break;
+
+		case UHCI_SUSPENDED:
+
+			/* wakeup if requested by a device */
+			if (uhci->resume_detect)
+				wakeup_hc(uhci);
+			break;
+
+		case UHCI_RESUMING_1:
+		case UHCI_RESUMING_2:
+		case UHCI_RUNNING_GRACE:
+			if (time_after_eq(jiffies, uhci->state_end))
+				wakeup_hc(uhci);
+			break;
+
+		default:
+			break;
+	}
+}
+
 static void start_hc(struct uhci_hcd *uhci)
 {
 	unsigned int io_addr = uhci->io_addr;
@@ -2003,6 +2090,8 @@ static void start_hc(struct uhci_hcd *uhci)
 	outl(uhci->fl->dma_handle, io_addr + USBFLBASEADD);
 
 	/* Run and mark it configured with a 64-byte max packet */
+	uhci->state = UHCI_RUNNING_GRACE;
+	uhci->state_end = jiffies + HZ;
 	outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
 
         uhci->hcd.state = USB_STATE_READY;
@@ -2101,8 +2190,6 @@ static int __devinit uhci_start(struct usb_hcd *hcd)
 	uhci->fsbr = 0;
 	uhci->fsbrtimeout = 0;
 
-	uhci->is_suspended = 0;
-
 	spin_lock_init(&uhci->qh_remove_list_lock);
 	INIT_LIST_HEAD(&uhci->qh_remove_list);
 
@@ -2335,7 +2422,11 @@ static int uhci_suspend(struct usb_hcd *hcd, u32 state)
 {
 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 
-	suspend_hc(uhci);
+	/* Don't try to suspend broken motherboards, reset instead */
+	if (suspend_allowed(uhci))
+		suspend_hc(uhci);
+	else
+		reset_hc(uhci);
 	return 0;
 }
 
@@ -2345,8 +2436,13 @@ static int uhci_resume(struct usb_hcd *hcd)
 
 	pci_set_master(uhci->hcd.pdev);
 
-	reset_hc(uhci);
-	start_hc(uhci);
+	if (uhci->state == UHCI_SUSPENDED)
+		uhci->resume_detect = 1;
+	else {
+		reset_hc(uhci);
+		start_hc(uhci);
+	}
+	uhci->hcd.state = USB_STATE_READY;
 	return 0;
 }
 #endif

drivers/usb/host/uhci-hcd.h

@@ -53,6 +53,7 @@
 #define   USBPORTSC_RD		0x0040	/* Resume Detect */
 #define   USBPORTSC_LSDA	0x0100	/* Low Speed Device Attached */
 #define   USBPORTSC_PR		0x0200	/* Port Reset */
+#define   USBPORTSC_OC		0x0400	/* Over Current condition */
 #define   USBPORTSC_SUSP	0x1000	/* Suspend */
 
 /* Legacy support register */
@@ -282,6 +283,29 @@ static inline int __interval_to_skel(int interval)
 	return 0;				/* int128 for 128-255 ms (Max.) */
 }
 
+/*
+ * Device states for the host controller.
+ *
+ * To prevent "bouncing" in the presence of electrical noise,
+ * we insist on a 1-second "grace" period, before switching to
+ * the RUNNING or SUSPENDED states, during which the state is
+ * not allowed to change.
+ *
+ * The resume process is divided into substates in order to avoid
+ * potentially length delays during the timer handler.
+ *
+ * States in which the host controller is halted must have values <= 0.
+ */
+enum uhci_state {
+	UHCI_RESET,
+	UHCI_RUNNING_GRACE,		/* Before RUNNING */
+	UHCI_RUNNING,			/* The normal state */
+	UHCI_SUSPENDING_GRACE,		/* Before SUSPENDED */
+	UHCI_SUSPENDED = -10,		/* When no devices are attached */
+	UHCI_RESUMING_1,
+	UHCI_RESUMING_2
+};
+
 #define hcd_to_uhci(hcd_ptr) container_of(hcd_ptr, struct uhci_hcd, hcd)
 
 /*
@@ -313,7 +337,10 @@ struct uhci_hcd {
 	struct uhci_frame_list *fl;		/* P: uhci->frame_list_lock */
 	int fsbr;				/* Full speed bandwidth reclamation */
 	unsigned long fsbrtimeout;		/* FSBR delay */
-	int is_suspended;
+
+	enum uhci_state state;			/* FIXME: needs a spinlock */
+	unsigned long state_end;		/* Time of next transition */
+	int resume_detect;			/* Need a Global Resume */
 
 	/* Main list of URB's currently controlled by this HC */
 	spinlock_t urb_list_lock;

drivers/usb/storage/transport.c

@@ -988,7 +988,7 @@ int usb_stor_Bulk_transport(Scsi_Cmnd *srb, struct us_data *us)
 	US_DEBUGP("Bulk status Sig 0x%x T 0x%x R %d Stat 0x%x\n",
 		  le32_to_cpu(bcs.Signature), bcs.Tag, 
 		  bcs.Residue, bcs.Status);
-	if (bcs.Signature != cpu_to_le32(US_BULK_CS_SIGN) || 
+	if ((bcs.Signature != cpu_to_le32(US_BULK_CS_SIGN) && bcs.Signature != cpu_to_le32(US_BULK_CS_OLYMPUS_SIGN)) || 
 	    bcs.Tag != bcb.Tag || 
 	    bcs.Status > US_BULK_STAT_PHASE) {
 		US_DEBUGP("Bulk logical error\n");

drivers/usb/storage/transport.h

@@ -105,6 +105,8 @@ struct bulk_cs_wrap {
 
 #define US_BULK_CS_WRAP_LEN	13
 #define US_BULK_CS_SIGN		0x53425355	/* spells out 'USBS' */
+/* This is for Olympus Camedia digital cameras */
+#define US_BULK_CS_OLYMPUS_SIGN		0x55425355	/* spells out 'USBU' */
 #define US_BULK_STAT_OK		0
 #define US_BULK_STAT_FAIL	1
 #define US_BULK_STAT_PHASE	2