Esempio n. 1
0
static int usb_hub_reset(struct usb_hub *hub)
{
	struct usb_device *dev = hub->dev;
	int i;

    DBG_HOST_HUB("### >>> Enter hub.c file --> usb_hub_reset function \n");
	/* Disconnect any attached devices */
	for (i = 0; i < hub->descriptor->bNbrPorts; i++) {
		if (dev->children[i])
			usb_disconnect(&dev->children[i]);
	}

	/* Attempt to reset the hub */
	if (hub->urb)
		usb_unlink_urb(hub->urb);
	else
		return -1;

	if (usb_reset_device(dev))
		return -1;

	hub->urb->dev = dev;                                                    
	if (usb_submit_urb(hub->urb))
		return -1;

	usb_hub_power_on(hub);

	return 0;
}
Esempio n. 2
0
File: hub.c Progetto: davidbau/davej
static int usb_hub_reset(struct usb_hub *hub)
{
	struct usb_device *dev = hub->dev;
	int i;

	/* Disconnect any attached devices */
	for (i = 0; i < hub->nports; i++) {
		if (dev->children[i])
			usb_disconnect(&dev->children[i]);
	}

	/* Attempt to reset the hub */
	if (hub->urb)
		usb_unlink_urb(hub->urb);
	else
		return -1;

	if (usb_reset_device(dev))
		return -1;

	if (usb_submit_urb(hub->urb))
		return -1;

	usb_hub_power_on(hub);

	return 0;
}
Esempio n. 3
0
static void usb_hub_events(void)
{
	unsigned long flags;
	struct list_head *tmp;
	struct usb_device *dev;
	struct usb_hub *hub;
	struct usb_hub_status hubsts;
	u16 hubstatus;
	u16 hubchange;
	u16 portstatus;
	u16 portchange;
	int i, ret;

	/*
	 *  We restart the list everytime to avoid a deadlock with
	 * deleting hubs downstream from this one. This should be
	 * safe since we delete the hub from the event list.
	 * Not the most efficient, but avoids deadlocks.
	 */
    DBG_HOST_HUB("### >>> Enter hub.c file --> usb_hub_events function \n");

	while (1) {
		spin_lock_irqsave(&hub_event_lock, flags);

		if (list_empty(&hub_event_list))
			break;

		/* Grab the next entry from the beginning of the list */
		tmp = hub_event_list.next;

		hub = list_entry(tmp, struct usb_hub, event_list);
		dev = hub->dev;

		list_del(tmp);
		INIT_LIST_HEAD(tmp);

		down(&hub->khubd_sem); /* never blocks, we were on list */
		spin_unlock_irqrestore(&hub_event_lock, flags);

		if (hub->error) {
			dbg("resetting hub %d for error %d", dev->devnum, hub->error);

			if (usb_hub_reset(hub)) {
				err("error resetting hub %d - disconnecting", dev->devnum);
				up(&hub->khubd_sem);
				usb_hub_disconnect(dev);
				continue;
			}

			hub->nerrors = 0;
			hub->error = 0;
		}

		for (i = 0; i < hub->descriptor->bNbrPorts; i++) {
			ret = usb_hub_port_status(dev, i, &portstatus, &portchange);
			if (ret < 0) {
				continue;
			}


			if (portchange & USB_PORT_STAT_C_CONNECTION) {
				dbg("port %d connection change", i + 1);

				usb_hub_port_connect_change(hub, i, portstatus, portchange);
			} else if (portchange & USB_PORT_STAT_C_ENABLE) {
				dbg("port %d enable change, status %x", i + 1, portstatus);
				usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);

				/*
				 * EM interference sometimes causes bad shielded USB devices to 
				 * be shutdown by the hub, this hack enables them again.
				 * Works at least with mouse driver. 
				 */
				if (!(portstatus & USB_PORT_STAT_ENABLE) && 
				    (portstatus & USB_PORT_STAT_CONNECTION) && (dev->children[i])) {
					err("already running port %i disabled by hub (EMI?), re-enabling...",
						i + 1);
					usb_hub_port_connect_change(hub, i, portstatus, portchange);
				}
			}

			if (portchange & USB_PORT_STAT_C_SUSPEND) {
				dbg("port %d suspend change", i + 1);
				usb_clear_port_feature(dev, i + 1,  USB_PORT_FEAT_C_SUSPEND);
			}
			
			if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
				err("port %d over-current change", i + 1);
				usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
				usb_hub_power_on(hub);
			}

			if (portchange & USB_PORT_STAT_C_RESET) {
				dbg("port %d reset change", i + 1);
				usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
			}
		} /* end for i */

		/* deal with hub status changes */
		if (usb_get_hub_status(dev, &hubsts) < 0)
			err("get_hub_status failed");
		else {
			hubstatus = le16_to_cpup(&hubsts.wHubStatus);
			hubchange = le16_to_cpup(&hubsts.wHubChange);
			if (hubchange & HUB_CHANGE_LOCAL_POWER) {
				dbg("hub power change");
				usb_clear_hub_feature(dev, C_HUB_LOCAL_POWER);
			}
			if (hubchange & HUB_CHANGE_OVERCURRENT) {
				dbg("hub overcurrent change");
				wait_ms(500);	/* Cool down */
				usb_clear_hub_feature(dev, C_HUB_OVER_CURRENT);
                        	usb_hub_power_on(hub);
			}
		}
		up(&hub->khubd_sem);
        } /* end while (1) */

	spin_unlock_irqrestore(&hub_event_lock, flags);
}
Esempio n. 4
0
static int usb_hub_configure(struct usb_hub *hub, struct usb_endpoint_descriptor *endpoint)
{
	struct usb_device *dev = hub->dev;
	struct usb_hub_status hubstatus;
	char portstr[USB_MAXCHILDREN + 1];
	unsigned int pipe;
	int i, maxp, ret;

    DBG_HOST_HUB("### >>> Enter hub.c file --> usb_hub_configure function \n");
	hub->descriptor = kmalloc(sizeof(*hub->descriptor), GFP_KERNEL);
	if (!hub->descriptor) {
		err("Unable to kmalloc %Zd bytes for hub descriptor", sizeof(*hub->descriptor));
		return -1;
	}

	/* Request the entire hub descriptor. */
	ret = usb_get_hub_descriptor(dev, hub->descriptor, sizeof(*hub->descriptor));
		/* <hub->descriptor> is large enough for a hub with 127 ports;
		 * the hub can/will return fewer bytes here. */
	if (ret < 0) {
		err("Unable to get hub descriptor (err = %d)", ret);
		kfree(hub->descriptor);
		return -1;
	}

	dev->maxchild = hub->descriptor->bNbrPorts;
	info("%d port%s detected", hub->descriptor->bNbrPorts, (hub->descriptor->bNbrPorts == 1) ? "" : "s");

	le16_to_cpus(&hub->descriptor->wHubCharacteristics);

	if (hub->descriptor->wHubCharacteristics & HUB_CHAR_COMPOUND)
		dbg("part of a compound device");
	else
		dbg("standalone hub");

	switch (hub->descriptor->wHubCharacteristics & HUB_CHAR_LPSM) {
		case 0x00:
			dbg("ganged power switching");
			break;
		case 0x01:
			dbg("individual port power switching");
			break;
		case 0x02:
		case 0x03:
			dbg("unknown reserved power switching mode");
			break;
	}

	switch (hub->descriptor->wHubCharacteristics & HUB_CHAR_OCPM) {
		case 0x00:
			dbg("global over-current protection");
			break;
		case 0x08:
			dbg("individual port over-current protection");
			break;
		case 0x10:
		case 0x18:
			dbg("no over-current protection");
                        break;
	}

	switch (dev->descriptor.bDeviceProtocol) {
		case 0:
			break;
		case 1:
			dbg("Single TT");
			hub->tt.hub = dev;
			break;
		case 2:
			dbg("TT per port");
			hub->tt.hub = dev;
			hub->tt.multi = 1;
			break;
		default:
			dbg("Unrecognized hub protocol %d",
				dev->descriptor.bDeviceProtocol);
			break;
	}

	switch (hub->descriptor->wHubCharacteristics & HUB_CHAR_TTTT) {
		case 0x00:
			if (dev->descriptor.bDeviceProtocol != 0)
				dbg("TT requires at most 8 FS bit times");
			break;
		case 0x20:
			dbg("TT requires at most 16 FS bit times");
			break;
		case 0x40:
			dbg("TT requires at most 24 FS bit times");
			break;
		case 0x60:
			dbg("TT requires at most 32 FS bit times");
			break;
	}

	dbg("Port indicators are %s supported", 
	    (hub->descriptor->wHubCharacteristics & HUB_CHAR_PORTIND) ? "" : "not");

	dbg("power on to power good time: %dms", hub->descriptor->bPwrOn2PwrGood * 2);
	dbg("hub controller current requirement: %dmA", hub->descriptor->bHubContrCurrent);

	for (i = 0; i < dev->maxchild; i++)
		portstr[i] = hub->descriptor->DeviceRemovable[((i + 1) / 8)] & (1 << ((i + 1) % 8)) ? 'F' : 'R';
	portstr[dev->maxchild] = 0;

	dbg("port removable status: %s", portstr);

	ret = usb_get_hub_status(dev, &hubstatus);
	if (ret < 0) {
		err("Unable to get hub status (err = %d)", ret);
		kfree(hub->descriptor);
		return -1;
	}

	le16_to_cpus(&hubstatus.wHubStatus);

	dbg("local power source is %s",
		(hubstatus.wHubStatus & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");

	dbg("%sover-current condition exists",
		(hubstatus.wHubStatus & HUB_STATUS_OVERCURRENT) ? "" : "no ");

	/* Start the interrupt endpoint */
	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
	maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));

	if (maxp > sizeof(hub->buffer))
		maxp = sizeof(hub->buffer);

	hub->urb = usb_alloc_urb(0);
	if (!hub->urb) {
		err("couldn't allocate interrupt urb");
		kfree(hub->descriptor);
		return -1;
	}

	FILL_INT_URB(hub->urb, dev, pipe, hub->buffer, maxp, hub_irq,
		hub, endpoint->bInterval);
	ret = usb_submit_urb(hub->urb);
	if (ret) {
		err("usb_submit_urb failed (%d)", ret);
		kfree(hub->descriptor);
		return -1;
	}
		
	/* Wake up khubd */
	wake_up(&khubd_wait);

	usb_hub_power_on(hub);

	return 0;
}
Esempio n. 5
0
static int usb_hub_configure(struct usb_device *dev)
{
	int i, length;
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
	unsigned char *bitmap;
	short hubCharacteristics;
	struct usb_hub_descriptor *descriptor;
	struct usb_hub_device *hub;
	__maybe_unused struct usb_hub_status *hubsts;

	/* "allocate" Hub device */
	hub = usb_hub_allocate();
	if (hub == NULL)
		return -1;
	hub->pusb_dev = dev;
	/* Get the the hub descriptor */
	if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
		debug("usb_hub_configure: failed to get hub " \
		      "descriptor, giving up %lX\n", dev->status);
		return -1;
	}
	descriptor = (struct usb_hub_descriptor *)buffer;

	length = min_t(int, descriptor->bLength,
		       sizeof(struct usb_hub_descriptor));

	if (usb_get_hub_descriptor(dev, buffer, length) < 0) {
		debug("usb_hub_configure: failed to get hub " \
		      "descriptor 2nd giving up %lX\n", dev->status);
		return -1;
	}
	memcpy((unsigned char *)&hub->desc, buffer, length);
	/* adjust 16bit values */
	put_unaligned(le16_to_cpu(get_unaligned(
			&descriptor->wHubCharacteristics)),
			&hub->desc.wHubCharacteristics);
	/* set the bitmap */
	bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
	/* devices not removable by default */
	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
	bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */

	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
		hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];

	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
		hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];

	dev->maxchild = descriptor->bNbrPorts;
	debug("%d ports detected\n", dev->maxchild);

	hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
	switch (hubCharacteristics & HUB_CHAR_LPSM) {
	case 0x00:
		debug("ganged power switching\n");
		break;
	case 0x01:
		debug("individual port power switching\n");
		break;
	case 0x02:
	case 0x03:
		debug("unknown reserved power switching mode\n");
		break;
	}

	if (hubCharacteristics & HUB_CHAR_COMPOUND)
		debug("part of a compound device\n");
	else
		debug("standalone hub\n");

	switch (hubCharacteristics & HUB_CHAR_OCPM) {
	case 0x00:
		debug("global over-current protection\n");
		break;
	case 0x08:
		debug("individual port over-current protection\n");
		break;
	case 0x10:
	case 0x18:
		debug("no over-current protection\n");
		break;
	}

	debug("power on to power good time: %dms\n",
	      descriptor->bPwrOn2PwrGood * 2);
	debug("hub controller current requirement: %dmA\n",
	      descriptor->bHubContrCurrent);

	for (i = 0; i < dev->maxchild; i++)
		debug("port %d is%s removable\n", i + 1,
		      hub->desc.DeviceRemovable[(i + 1) / 8] & \
		      (1 << ((i + 1) % 8)) ? " not" : "");

	if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
		debug("usb_hub_configure: failed to get Status - " \
		      "too long: %d\n", descriptor->bLength);
		return -1;
	}

	if (usb_get_hub_status(dev, buffer) < 0) {
		debug("usb_hub_configure: failed to get Status %lX\n",
		      dev->status);
		return -1;
	}

#ifdef DEBUG
	hubsts = (struct usb_hub_status *)buffer;
#endif

	debug("get_hub_status returned status %X, change %X\n",
	      le16_to_cpu(hubsts->wHubStatus),
	      le16_to_cpu(hubsts->wHubChange));
	debug("local power source is %s\n",
	      (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
	      "lost (inactive)" : "good");
	debug("%sover-current condition exists\n",
	      (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
	      "" : "no ");
	usb_hub_power_on(hub);

	/*
	 * Reset any devices that may be in a bad state when applying
	 * the power.  This is a __weak function.  Resetting of the devices
	 * should occur in the board file of the device.
	 */
	for (i = 0; i < dev->maxchild; i++)
		usb_hub_reset_devices(i + 1);

	for (i = 0; i < dev->maxchild; i++) {
		ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
		unsigned short portstatus, portchange;
		int ret;
		ulong start = get_timer(0);

		/*
		 * Wait for (whichever finishes first)
		 *  - A maximum of 10 seconds
		 *    This is a purely observational value driven by connecting
		 *    a few broken pen drives and taking the max * 1.5 approach
		 *  - connection_change and connection state to report same
		 *    state
		 */
		do {
			ret = usb_get_port_status(dev, i + 1, portsts);
			if (ret < 0) {
				debug("get_port_status failed\n");
				break;
			}

			portstatus = le16_to_cpu(portsts->wPortStatus);
			portchange = le16_to_cpu(portsts->wPortChange);

			if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
				(portstatus & USB_PORT_STAT_CONNECTION))
				break;

		} while (get_timer(start) < CONFIG_SYS_HZ * 10);

		if (ret < 0)
			continue;

		debug("Port %d Status %X Change %X\n",
		      i + 1, portstatus, portchange);

		if (portchange & USB_PORT_STAT_C_CONNECTION) {
			debug("port %d connection change\n", i + 1);
			usb_hub_port_connect_change(dev, i);
		}
		if (portchange & USB_PORT_STAT_C_ENABLE) {
			debug("port %d enable change, status %x\n",
			      i + 1, portstatus);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_ENABLE);
			/*
			 * The following hack causes a ghost device problem
			 * to Faraday EHCI
			 */
#ifndef CONFIG_USB_EHCI_FARADAY
			/* EM interference sometimes causes bad shielded USB
			 * devices to be shutdown by the hub, this hack enables
			 * them again. Works at least with mouse driver */
			if (!(portstatus & USB_PORT_STAT_ENABLE) &&
			     (portstatus & USB_PORT_STAT_CONNECTION) &&
			     ((dev->children[i]))) {
				debug("already running port %i "  \
				      "disabled by hub (EMI?), " \
				      "re-enabling...\n", i + 1);
				      usb_hub_port_connect_change(dev, i);
			}
#endif
		}
		if (portstatus & USB_PORT_STAT_SUSPEND) {
			debug("port %d suspend change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_SUSPEND);
		}

		if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
			debug("port %d over-current change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_OVER_CURRENT);
			usb_hub_power_on(hub);
		}

		if (portchange & USB_PORT_STAT_C_RESET) {
			debug("port %d reset change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_RESET);
		}
	} /* end for i all ports */

	return 0;
}
Esempio n. 6
0
static int usb_hub_configure(struct usb_device *dev)
{
	unsigned char buffer[USB_BUFSIZ], *bitmap;
	struct usb_hub_descriptor *descriptor;
	struct usb_hub_status *hubsts;
	int i;
	struct usb_hub_device *hub;

	hub = xzalloc(sizeof (*hub));
	dev->hub = hub;

	hub->pusb_dev = dev;
	/* Get the the hub descriptor */
	if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
		dev_dbg(&dev->dev, "%s: failed to get hub " \
				   "descriptor, giving up %lX\n", __func__, dev->status);
		return -1;
	}
	descriptor = (struct usb_hub_descriptor *)buffer;

	/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
	i = descriptor->bLength;
	if (i > USB_BUFSIZ) {
		dev_dbg(&dev->dev, "%s: failed to get hub " \
				"descriptor - too long: %d\n", __func__,
				descriptor->bLength);
		return -1;
	}

	if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
		dev_dbg(&dev->dev, "%s: failed to get hub " \
				"descriptor 2nd giving up %lX\n", __func__, dev->status);
		return -1;
	}
	memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
	/* adjust 16bit values */
	hub->desc.wHubCharacteristics =
				le16_to_cpu(descriptor->wHubCharacteristics);
	/* set the bitmap */
	bitmap = (unsigned char *)&hub->desc.u.hs.DeviceRemovable[0];
	/* devices not removable by default */
	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
	bitmap = (unsigned char *)&hub->desc.u.hs.PortPwrCtrlMask[0];
	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */

	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
		hub->desc.u.hs.DeviceRemovable[i] = descriptor->u.hs.DeviceRemovable[i];

	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
		hub->desc.u.hs.PortPwrCtrlMask[i] = descriptor->u.hs.PortPwrCtrlMask[i];

	dev->maxchild = descriptor->bNbrPorts;
	dev_dbg(&dev->dev, "%d ports detected\n", dev->maxchild);

	switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
	case 0x00:
		dev_dbg(&dev->dev, "ganged power switching\n");
		break;
	case 0x01:
		dev_dbg(&dev->dev, "individual port power switching\n");
		break;
	case 0x02:
	case 0x03:
		dev_dbg(&dev->dev, "unknown reserved power switching mode\n");
		break;
	}

	if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
		dev_dbg(&dev->dev, "part of a compound device\n");
	else
		dev_dbg(&dev->dev, "standalone hub\n");

	switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
	case 0x00:
		dev_dbg(&dev->dev, "global over-current protection\n");
		break;
	case 0x08:
		dev_dbg(&dev->dev, "individual port over-current protection\n");
		break;
	case 0x10:
	case 0x18:
		dev_dbg(&dev->dev, "no over-current protection\n");
		break;
	}

	dev_dbg(&dev->dev, "power on to power good time: %dms\n",
			descriptor->bPwrOn2PwrGood * 2);
	dev_dbg(&dev->dev, "hub controller current requirement: %dmA\n",
			descriptor->bHubContrCurrent);

	for (i = 0; i < dev->maxchild; i++)
		dev_dbg(&dev->dev, "port %d is%s removable\n", i + 1,
			hub->desc.u.hs.DeviceRemovable[(i + 1) / 8] & \
					   (1 << ((i + 1) % 8)) ? " not" : "");

	if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
		dev_dbg(&dev->dev, "%s: failed to get Status - " \
				"too long: %d\n", __func__, descriptor->bLength);
		return -1;
	}

	if (usb_get_hub_status(dev, buffer) < 0) {
		dev_dbg(&dev->dev, "%s: failed to get Status %lX\n", __func__,
				dev->status);
		return -1;
	}

	hubsts = (struct usb_hub_status *)buffer;
	dev_dbg(&dev->dev, "get_hub_status returned status %X, change %X\n",
			le16_to_cpu(hubsts->wHubStatus),
			le16_to_cpu(hubsts->wHubChange));
	dev_dbg(&dev->dev, "local power source is %s\n",
		(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
		"lost (inactive)" : "good");
	dev_dbg(&dev->dev, "%sover-current condition exists\n",
		(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
		"" : "no ");
	usb_hub_power_on(hub);

	return 0;
}
Esempio n. 7
0
static int usb_hub_configure_port(struct usb_device *dev, int port)
{
	struct usb_port_status portsts;
	unsigned short portstatus, portchange;
	int connect_change = 0;

	if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
		dev_dbg(&dev->dev, "get_port_status failed\n");
		return -EIO;
	}

	portstatus = le16_to_cpu(portsts.wPortStatus);
	portchange = le16_to_cpu(portsts.wPortChange);
	dev_dbg(&dev->dev, "Port %d Status %X Change %X\n",
			port + 1, portstatus, portchange);

	if (portchange & USB_PORT_STAT_C_CONNECTION) {
		dev_dbg(&dev->dev, "port %d connection change\n", port + 1);
		connect_change = 1;
	}
	if (portchange & USB_PORT_STAT_C_ENABLE) {
		dev_dbg(&dev->dev, "port %d enable change, status %x\n",
				port + 1, portstatus);
		usb_clear_port_feature(dev, port + 1,
					USB_PORT_FEAT_C_ENABLE);

		/* EM interference sometimes causes bad shielded USB
		 * devices to be shutdown by the hub, this hack enables
		 * them again. Works at least with mouse driver */
		if (!(portstatus & USB_PORT_STAT_ENABLE) &&
		     (portstatus & USB_PORT_STAT_CONNECTION) &&
		     ((dev->children[port]))) {
			dev_dbg(&dev->dev, "already running port %i "  \
					"disabled by hub (EMI?), " \
					"re-enabling...\n", port + 1);
				connect_change = 1;
		}
	}

	if (connect_change)
		usb_hub_port_connect_change(dev, port);

	if (portstatus & USB_PORT_STAT_SUSPEND) {
		dev_dbg(&dev->dev, "port %d suspend change\n", port + 1);
		usb_clear_port_feature(dev, port + 1,
					USB_PORT_FEAT_SUSPEND);
	}

	if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
		dev_dbg(&dev->dev, "port %d over-current change\n", port + 1);
		usb_clear_port_feature(dev, port + 1,
					USB_PORT_FEAT_C_OVER_CURRENT);
		usb_hub_power_on(dev->hub);
	}

	if (portchange & USB_PORT_STAT_C_RESET) {
		dev_dbg(&dev->dev, "port %d reset change\n", port + 1);
		usb_clear_port_feature(dev, port + 1,
					USB_PORT_FEAT_C_RESET);
	}

	return 0;
}
Esempio n. 8
0
int  usb_hub_events(void)
{
    USB_LIST_T  *tmp;
    USB_DEV_T   *dev;
    USB_HUB_T   *hub;
    USB_HUB_STATUS_T  hubsts;
    uint16_t    hubchange;
    uint16_t    irq_data;
    int         i, ret;
    
    //printf("0x%x 0x%x\n", *(uint32_t *)0x40009054, *(uint32_t *)0x40009058);

    if(list_empty(&_HubEventList))
        return 0;

    /*
     *  We restart the list everytime to avoid a deadlock with
     *  deleting hubs downstream from this one. This should be
     *  safe since we delete the hub from the event list.
     *  Not the most efficient, but avoids deadlocks.
     */
    while(1)
    {
        if(list_empty(&_HubEventList))
            break;

        /* Grab the next entry from the beginning of the list */
        tmp = _HubEventList.next;

        hub = list_entry(tmp, USB_HUB_T, event_list);
        dev = hub->dev;

        list_del(tmp);
        INIT_LIST_HEAD(tmp);

        if(hub->error)
        {
            USB_error("hub error %d!!\n", hub->error);
        }

        /* added by YCHuang */
        if(hub->urb->transfer_buffer_length == 1)
            irq_data = *(uint8_t *)hub->urb->transfer_buffer;
        else
        {
            /* BIGBIG */
            //irq_data = *(uint16_t *)hub->urb->transfer_buffer;  /* FIX DEBUG, not verified */
            irq_data = (*((uint8_t *)hub->urb->transfer_buffer + 1) << 8) |
                       *(uint8_t *)hub->urb->transfer_buffer;
        }

        for(i = 0; i < hub->descriptor.bNbrPorts; i++)
        {
            USB_PORT_STATUS_T  portsts;
            uint16_t    portstatus, portchange;

            if(!((irq_data >> (i + 1)) & 0x01))
                continue;

            USB_info("usb_hub_events - hub:%d, get port status...\n", hub->dev->devnum);
            ret = usb_get_port_status(dev, i + 1, &portsts);
            if(ret < 0)
            {
                USB_error("Error - get_hub %d port %d status failed (err = %d)\n", hub->dev->devnum, i + 1, ret);
                continue;
            }

            portstatus = portsts.wPortStatus;
            portchange = portsts.wPortChange;
            USB_debug("port %d, portstatus = %x, portchange = %x\n", i, portstatus, portchange);

            if(portchange & USB_PORT_STAT_C_CONNECTION)
            {
                USB_info("port %d of hub %d connection change\n", i + 1, hub->dev->devnum);
                usb_hub_port_connect_change(hub, dev, i, &portsts);
            }
            else if(portchange & USB_PORT_STAT_C_ENABLE)
            {
                USB_info("port %d of hub %d enable change, status %x\n", i + 1, portstatus, hub->dev->devnum);
                usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);

                /*
                 *  EM interference sometimes causes bad shielded USB
                 *  devices to be shutdown by the hub, this hack enables
                 *  them again. Works at least with mouse driver.
                 */
                if(!(portstatus & USB_PORT_STAT_ENABLE) &&
                        (portstatus & USB_PORT_STAT_CONNECTION) &&
                        (dev->children[i]))
                {
                    USB_error("Error - already running port %i disabled by hub (EMI?), re-enabling...\n",  i + 1);
                    usb_hub_port_connect_change(hub, dev, i, &portsts);
                }
            }

            if(portchange & USB_PORT_STAT_C_SUSPEND)
            {
                USB_info("port %d of hub %d suspend change\n", i + 1, hub->dev->devnum);
                usb_clear_port_feature(dev, i + 1,  USB_PORT_FEAT_C_SUSPEND);
            }

            if(portchange & USB_PORT_STAT_C_OVERCURRENT)
            {
                USB_warning("!! port %d of hub %d over-current change\n", i + 1, hub->dev->devnum);
                usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
                usb_hub_power_on(hub);
            }

            if(portchange & USB_PORT_STAT_C_RESET)
            {
                USB_info("port %d of hub %d reset change\n", i + 1, hub->dev->devnum);
                usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
            }
        } /* end for i */

        /* deal with hub status changes */
        if (usb_get_hub_status(dev, &hubsts) < 0)
            USB_error("Error - get_hub_status failed\n");
        else
        {
            //hubstatus = USB_SWAP16(hubsts.wHubStatus);
            hubchange = USB_SWAP16(hubsts.wHubChange);
            if(hubchange & HUB_CHANGE_LOCAL_POWER)
            {
                USB_debug("hub power change\n");
                usb_clear_hub_feature(dev, C_HUB_LOCAL_POWER);
            }
            if(hubchange & HUB_CHANGE_OVERCURRENT)
            {
                USB_error("!!hub overcurrent change\n");
                usbh_mdelay(500);   /* Cool down */
                usb_clear_hub_feature(dev, C_HUB_OVER_CURRENT);
                usb_hub_power_on(hub);
            }
        }

    } /* end while (1) */

    return 1;
}
Esempio n. 9
0
static int usb_hub_configure(USB_HUB_T *hub, EP_INFO_T *ep_info)
{
    USB_DEV_T           *dev = hub->dev;
    USB_HUB_STATUS_T    hubstatus;
    uint32_t            pipe;
    int                 maxp, ret;

    USB_info("[HUB] Enter usb_hub_configure()... hub:%d\n", hub->dev->devnum);

    /* Request the entire hub descriptor. */
    ret = usb_get_hub_descriptor(dev, &hub->descriptor, sizeof(USB_HUB_DESC_T));

    /* <hub->descriptor> is large enough for a hub with 127 ports;
     * the hub can/will return fewer bytes here. */
    if(ret < 0)
    {
        USB_error("Erro - Unable to get hub descriptor (err = %d)\n", ret);
        return ret;
    }

    dev->maxchild = hub->descriptor.bNbrPorts;

#ifdef USB_VERBOSE_DEBUG
    USB_info("%d port%s detected\n", hub->descriptor.bNbrPorts, (hub->descriptor.bNbrPorts == 1) ? "" : "s");

    /* D2: Identifying a Compound Device */
    if(hub->descriptor.wHubCharacteristics & HUB_CHAR_COMPOUND)
    {
        USB_info("part of a compound device\n");
    }
    else
    {
        USB_info("standalone hub\n");
    }

    /* D1..D0: Logical Power Switching Mode */
    switch(hub->descriptor.wHubCharacteristics & HUB_CHAR_LPSM)
    {
        case 0x00:
            USB_info("ganged power switching\n");
            break;
        case 0x01:
            USB_info("individual port power switching\n");
            break;
        case 0x02:
        case 0x03:
            USB_info("unknown reserved power switching mode\n");
            break;
    }

    /* D4..D3: Over-current Protection Mode */
    switch(hub->descriptor.wHubCharacteristics & HUB_CHAR_OCPM)
    {
        case 0x00:
            USB_info("global over-current protection\n");
            break;
        case 0x08:
            USB_info("individual port over-current protection\n");
            break;
        case 0x10:
        case 0x18:
            USB_info("no over-current protection\n");
            break;
    }

    switch(dev->descriptor.bDeviceProtocol)
    {
        case 0:
            break;
        case 1:
            USB_debug("Single TT, ");
            break;
        case 2:
            USB_debug("TT per port, ");
            break;
        default:
            USB_debug("Unrecognized hub protocol %d", dev->descriptor.bDeviceProtocol);
            break;
    }

    USB_info("power on to power good time: %dms\n", hub->descriptor.bPwrOn2PwrGood * 2);
    USB_info("hub controller current requirement: %dmA\n", hub->descriptor.bHubContrCurrent);
#endif

    ret = usb_get_hub_status(dev, &hubstatus);
    if(ret < 0)
    {
        USB_error("Unable to get hub %d status (err = %d)\n", hub->dev->devnum, ret);
        return ret;
    }

    hubstatus.wHubStatus = USB_SWAP16(hubstatus.wHubStatus);

#ifdef USB_VERBOSE_DEBUG
    /* Hub status bit 0, Local Power Source */
    if(hubstatus.wHubStatus & HUB_STATUS_LOCAL_POWER)
    {
        USB_info("local power source is lost (inactive)\n");
    }
    else
    {
        USB_info("local power source is good\n");
    }

    /* Hub status bit 1, Over-current Indicator */
    if(hubstatus.wHubStatus & HUB_STATUS_OVERCURRENT)
    {
        USB_info("!! over-current\n");
    }
    else
    {
        USB_info("No over-current.\n");
    }
#endif

    /* Start the interrupt endpoint */
    pipe = usb_rcvintpipe(dev, ep_info->bEndpointAddress);
    maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));

    if(maxp > sizeof(hub->buffer))
        maxp = sizeof(hub->buffer);

    hub->urb = USBH_AllocUrb();
    if(!hub->urb)
    {
        USB_error("Error - couldn't allocate interrupt urb");
        return USB_ERR_NOMEM;
    }

#if 1   /* YCHuang 2012.06.01 */
    if(ep_info->bInterval < 16)
        ep_info->bInterval = 16;
#endif
    FILL_INT_URB(hub->urb, dev, pipe, hub->buffer, maxp, hub_irq,
                 hub, ep_info->bInterval);
    ret = USBH_SubmitUrb(hub->urb);
    if(ret)
    {
        USB_error("Error - USBH_SubmitUrb failed (%d)", ret);
        USBH_FreeUrb(hub->urb);
        return ret;
    }

    if(g_ohci_bus.root_hub != hub->dev)
        usb_hub_power_on(hub);
    return 0;
}
Esempio n. 10
0
static int usb_hub_configure(struct usb_device *dev)
{
	int i;
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
	unsigned char *bitmap;
	short hubCharacteristics;
	struct usb_hub_descriptor *descriptor;
	struct usb_hub_device *hub;
#ifdef USB_HUB_DEBUG
	struct usb_hub_status *hubsts;
#endif

	/* "allocate" Hub device */
	hub = usb_hub_allocate();
	if (hub == NULL)
		return -1;
	hub->pusb_dev = dev;
	/* Get the the hub descriptor */
	if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
				   "descriptor, giving up %lX\n", dev->status);
		return -1;
	}
	descriptor = (struct usb_hub_descriptor *)buffer;

	/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
	i = descriptor->bLength;
	if (i > USB_BUFSIZ) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
				"descriptor - too long: %d\n",
				descriptor->bLength);
		return -1;
	}

	if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
				"descriptor 2nd giving up %lX\n", dev->status);
		return -1;
	}
	memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
	/* adjust 16bit values */
	put_unaligned(le16_to_cpu(get_unaligned(
			&descriptor->wHubCharacteristics)),
			&hub->desc.wHubCharacteristics);
	/* set the bitmap */
	bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
	/* devices not removable by default */
	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
	bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */

	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
		hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];

	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
		hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];

	dev->maxchild = descriptor->bNbrPorts;
	USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);

	hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
	switch (hubCharacteristics & HUB_CHAR_LPSM) {
	case 0x00:
		USB_HUB_PRINTF("ganged power switching\n");
		break;
	case 0x01:
		USB_HUB_PRINTF("individual port power switching\n");
		break;
	case 0x02:
	case 0x03:
		USB_HUB_PRINTF("unknown reserved power switching mode\n");
		break;
	}

	if (hubCharacteristics & HUB_CHAR_COMPOUND)
		USB_HUB_PRINTF("part of a compound device\n");
	else
		USB_HUB_PRINTF("standalone hub\n");

	switch (hubCharacteristics & HUB_CHAR_OCPM) {
	case 0x00:
		USB_HUB_PRINTF("global over-current protection\n");
		break;
	case 0x08:
		USB_HUB_PRINTF("individual port over-current protection\n");
		break;
	case 0x10:
	case 0x18:
		USB_HUB_PRINTF("no over-current protection\n");
		break;
	}

	USB_HUB_PRINTF("power on to power good time: %dms\n",
			descriptor->bPwrOn2PwrGood * 2);
	USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
			descriptor->bHubContrCurrent);

	for (i = 0; i < dev->maxchild; i++)
		USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
			hub->desc.DeviceRemovable[(i + 1) / 8] & \
					   (1 << ((i + 1) % 8)) ? " not" : "");

	if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
				"too long: %d\n", descriptor->bLength);
		return -1;
	}

	if (usb_get_hub_status(dev, buffer) < 0) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
				dev->status);
		return -1;
	}

#ifdef USB_HUB_DEBUG
	hubsts = (struct usb_hub_status *)buffer;
#endif
	USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
			le16_to_cpu(hubsts->wHubStatus),
			le16_to_cpu(hubsts->wHubChange));
	USB_HUB_PRINTF("local power source is %s\n",
		(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
		"lost (inactive)" : "good");
	USB_HUB_PRINTF("%sover-current condition exists\n",
		(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
		"" : "no ");
	usb_hub_power_on(hub);

	for (i = 0; i < dev->maxchild; i++) {
		ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
		unsigned short portstatus, portchange;
		int ret;
		ulong start = get_timer(0);

		/*
		 * Wait for (whichever finishes first)
		 *  - A maximum of 10 seconds
		 *    This is a purely observational value driven by connecting
		 *    a few broken pen drives and taking the max * 1.5 approach
		 *  - connection_change and connection state to report same
		 *    state
		 */
		do {
			ret = usb_get_port_status(dev, i + 1, portsts);
			if (ret < 0) {
				USB_HUB_PRINTF("get_port_status failed\n");
				break;
			}

			portstatus = le16_to_cpu(portsts->wPortStatus);
			portchange = le16_to_cpu(portsts->wPortChange);
#ifdef CONFIG_MARVELL
/* - USB3.0 issue with Avanta-LP/Armada-375:
 *   If usb device was already connected before detection ('usb start'),
 *   port connect status bit is set (USB_PORT_STAT_CONNECTION),
 *   but port connect status change bit (USB_PORT_STAT_C_CONNECTION) is not set.
 * - Added WA (aligned with kernel driver): instead of checking port change status,
 *   to be satisfied with checking USB_PORT_STAT_CONNECTION Bit on portstatus only" */
			if (((portchange & USB_PORT_STAT_C_CONNECTION) ==
				(portstatus & USB_PORT_STAT_CONNECTION)) ||
				(portstatus & USB_PORT_STAT_CONNECTION))
#else
			if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
				(portstatus & USB_PORT_STAT_CONNECTION))
#endif
				break;

			mdelay(100);
		} while (get_timer(start) < CONFIG_SYS_HZ * 10);

		if (ret < 0)
			continue;

		USB_HUB_PRINTF("Port %d Status %X Change %X\n",
				i + 1, portstatus, portchange);
#ifdef CONFIG_MARVELL
/* - USB3.0 issue with Avanta-LP/Armada-375:
 *   If usb device was already connected before detection ('usb start'),
 *   port connect status bit is set (USB_PORT_STAT_CONNECTION),
 *   but port connect status change bit (USB_PORT_STAT_C_CONNECTION) is not set.
 * - Added WA (aligned with kernel driver): instead of checking port change status,
 *   to be satisfied with checking USB_PORT_STAT_CONNECTION Bit on portstatus only" */
		if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
			(portstatus & USB_PORT_STAT_CONNECTION)) {
#else
		if (portchange & USB_PORT_STAT_C_CONNECTION) {
#endif
			USB_HUB_PRINTF("port %d connection change\n", i + 1);
			usb_hub_port_connect_change(dev, i);
		}
		if (portchange & USB_PORT_STAT_C_ENABLE) {
			USB_HUB_PRINTF("port %d enable change, status %x\n",
					i + 1, portstatus);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_ENABLE);

			/* EM interference sometimes causes bad shielded USB
			 * devices to be shutdown by the hub, this hack enables
			 * them again. Works at least with mouse driver */
			if (!(portstatus & USB_PORT_STAT_ENABLE) &&
			     (portstatus & USB_PORT_STAT_CONNECTION) &&
			     ((dev->children[i]))) {
				USB_HUB_PRINTF("already running port %i "  \
						"disabled by hub (EMI?), " \
						"re-enabling...\n", i + 1);
					usb_hub_port_connect_change(dev, i);
			}
		}
		if (portstatus & USB_PORT_STAT_SUSPEND) {
			USB_HUB_PRINTF("port %d suspend change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_SUSPEND);
		}

		if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
			USB_HUB_PRINTF("port %d over-current change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_OVER_CURRENT);
			usb_hub_power_on(hub);
		}

		if (portchange & USB_PORT_STAT_C_RESET) {
			USB_HUB_PRINTF("port %d reset change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_RESET);
		}
	} /* end for i all ports */

	return 0;
}

int usb_hub_probe(struct usb_device *dev, int ifnum)
{
	struct usb_interface *iface;
	struct usb_endpoint_descriptor *ep;
	int ret;

	iface = &dev->config.if_desc[ifnum];
	/* Is it a hub? */
	if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
		return 0;
	/* Some hubs have a subclass of 1, which AFAICT according to the */
	/*  specs is not defined, but it works */
	if ((iface->desc.bInterfaceSubClass != 0) &&
	    (iface->desc.bInterfaceSubClass != 1))
		return 0;
	/* Multiple endpoints? What kind of mutant ninja-hub is this? */
	if (iface->desc.bNumEndpoints != 1)
		return 0;
	ep = &iface->ep_desc[0];
	/* Output endpoint? Curiousier and curiousier.. */
	if (!(ep->bEndpointAddress & USB_DIR_IN))
		return 0;
	/* If it's not an interrupt endpoint, we'd better punt! */
	if ((ep->bmAttributes & 3) != 3)
		return 0;
	/* We found a hub */
	USB_HUB_PRINTF("USB hub found\n");
	ret = usb_hub_configure(dev);
	return ret;
}
Esempio n. 11
0
int usb_hub_configure(struct usb_device *dev)
{
	int i;
	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
	unsigned char *bitmap;
	struct usb_hub_descriptor *descriptor;
	struct usb_hub_device *hub;
#ifdef USB_HUB_DEBUG
	struct usb_hub_status *hubsts;
#endif

	/* "allocate" Hub device */
	hub = usb_hub_allocate();
	if (hub == NULL)
		return -1;
	hub->pusb_dev = dev;
	/* Get the the hub descriptor */
	if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
				   "descriptor, giving up %lX\n", dev->status);
		return -1;
	}
	descriptor = (struct usb_hub_descriptor *)buffer;

	/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
	i = descriptor->bLength;
	if (i > USB_BUFSIZ) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
				"descriptor - too long: %d\n",
				descriptor->bLength);
		return -1;
	}

	if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
				"descriptor 2nd giving up %lX\n", dev->status);
		return -1;
	}
	memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
	/* adjust 16bit values */
	hub->desc.wHubCharacteristics =
				le16_to_cpu(descriptor->wHubCharacteristics);
	/* set the bitmap */
	bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
	/* devices not removable by default */
	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
	bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */

	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
		hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];

	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
		hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];

	dev->maxchild = descriptor->bNbrPorts;
	USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);

	switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
	case 0x00:
		USB_HUB_PRINTF("ganged power switching\n");
		break;
	case 0x01:
		USB_HUB_PRINTF("individual port power switching\n");
		break;
	case 0x02:
	case 0x03:
		USB_HUB_PRINTF("unknown reserved power switching mode\n");
		break;
	}

	if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
		USB_HUB_PRINTF("part of a compound device\n");
	else
		USB_HUB_PRINTF("standalone hub\n");

	switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
	case 0x00:
		USB_HUB_PRINTF("global over-current protection\n");
		break;
	case 0x08:
		USB_HUB_PRINTF("individual port over-current protection\n");
		break;
	case 0x10:
	case 0x18:
		USB_HUB_PRINTF("no over-current protection\n");
		break;
	}

	USB_HUB_PRINTF("power on to power good time: %dms\n",
			descriptor->bPwrOn2PwrGood * 2);
	USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
			descriptor->bHubContrCurrent);

	for (i = 0; i < dev->maxchild; i++)
		USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
			hub->desc.DeviceRemovable[(i + 1) / 8] & \
					   (1 << ((i + 1) % 8)) ? " not" : "");

	if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
				"too long: %d\n", descriptor->bLength);
		return -1;
	}

	if (usb_get_hub_status(dev, buffer) < 0) {
		USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
				dev->status);
		return -1;
	}

#ifdef USB_HUB_DEBUG
	hubsts = (struct usb_hub_status *)buffer;
#endif
	USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
			le16_to_cpu(hubsts->wHubStatus),
			le16_to_cpu(hubsts->wHubChange));
	USB_HUB_PRINTF("local power source is %s\n",
		(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
		"lost (inactive)" : "good");
	USB_HUB_PRINTF("%sover-current condition exists\n",
		(le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
		"" : "no ");
	usb_hub_power_on(hub);

	for (i = 0; i < dev->maxchild; i++) {
		ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
		unsigned short portstatus, portchange;

		if (usb_get_port_status(dev, i + 1, portsts) < 0) {
			USB_HUB_PRINTF("get_port_status failed\n");
			continue;
		}

		portstatus = le16_to_cpu(portsts->wPortStatus);
		portchange = le16_to_cpu(portsts->wPortChange);
		USB_HUB_PRINTF("Port %d Status %X Change %X\n",
				i + 1, portstatus, portchange);

		if (portchange & USB_PORT_STAT_C_CONNECTION) {
			USB_HUB_PRINTF("port %d connection change\n", i + 1);
			usb_hub_port_connect_change(dev, i);
		}
		if (portchange & USB_PORT_STAT_C_ENABLE) {
			USB_HUB_PRINTF("port %d enable change, status %x\n",
					i + 1, portstatus);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_ENABLE);

			/* EM interference sometimes causes bad shielded USB
			 * devices to be shutdown by the hub, this hack enables
			 * them again. Works at least with mouse driver */
			if (!(portstatus & USB_PORT_STAT_ENABLE) &&
			     (portstatus & USB_PORT_STAT_CONNECTION) &&
			     ((dev->children[i]))) {
				USB_HUB_PRINTF("already running port %i "  \
						"disabled by hub (EMI?), " \
						"re-enabling...\n", i + 1);
					usb_hub_port_connect_change(dev, i);
			}
		}
		if (portstatus & USB_PORT_STAT_SUSPEND) {
			USB_HUB_PRINTF("port %d suspend change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_SUSPEND);
		}

		if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
			USB_HUB_PRINTF("port %d over-current change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_OVER_CURRENT);
			usb_hub_power_on(hub);
		}

		if (portchange & USB_PORT_STAT_C_RESET) {
			USB_HUB_PRINTF("port %d reset change\n", i + 1);
			usb_clear_port_feature(dev, i + 1,
						USB_PORT_FEAT_C_RESET);
		}
	} /* end for i all ports */

	return 0;
}