ret = get_hub_status(hub->hdev, &hub->status->hub);
if (ret < 0)
dev_err (hub->intfdev,
- "%s failed (err = %d)\n", __FUNCTION__, ret);
+ "%s failed (err = %d)\n", __func__, ret);
else {
*status = le16_to_cpu(hub->status->hub.wHubStatus);
*change = le16_to_cpu(hub->status->hub.wHubChange);
#ifdef CONFIG_PM
+/* Try to identify which devices need USB-PERSIST handling */
+static int persistent_device(struct usb_device *udev)
+{
+ int i;
+ int retval;
+ struct usb_host_config *actconfig;
+
+ /* Explicitly not marked persistent? */
+ if (!udev->persist_enabled)
+ return 0;
+
+ /* No active config? */
+ actconfig = udev->actconfig;
+ if (!actconfig)
+ return 0;
+
+ /* FIXME! We should check whether it's open here or not! */
+
+ /*
+ * Check that all the interface drivers have a
+ * 'reset_resume' entrypoint
+ */
+ retval = 0;
+ for (i = 0; i < actconfig->desc.bNumInterfaces; i++) {
+ struct usb_interface *intf;
+ struct usb_driver *driver;
+
+ intf = actconfig->interface[i];
+ if (!intf->dev.driver)
+ continue;
+ driver = to_usb_driver(intf->dev.driver);
+ if (!driver->reset_resume)
+ return 0;
+ /*
+ * We have at least one driver, and that one
+ * has a reset_resume method.
+ */
+ retval = 1;
+ }
+ return retval;
+}
+
static void hub_restart(struct usb_hub *hub, int type)
{
struct usb_device *hdev = hub->hdev;
* turn off the various status changes to prevent
* khubd from disconnecting it later.
*/
- if (udev->persist_enabled && status == 0 &&
- !(portstatus & USB_PORT_STAT_ENABLE)) {
+ if (status == 0 && !(portstatus & USB_PORT_STAT_ENABLE) &&
+ persistent_device(udev)) {
if (portchange & USB_PORT_STAT_C_ENABLE)
clear_port_feature(hub->hdev, port1,
USB_PORT_FEAT_C_ENABLE);
spin_unlock_irqrestore(&device_state_lock, flags);
}
+/*
+ * WUSB devices are simple: they have no hubs behind, so the mapping
+ * device <-> virtual port number becomes 1:1. Why? to simplify the
+ * life of the device connection logic in
+ * drivers/usb/wusbcore/devconnect.c. When we do the initial secret
+ * handshake we need to assign a temporary address in the unauthorized
+ * space. For simplicity we use the first virtual port number found to
+ * be free [drivers/usb/wusbcore/devconnect.c:wusbhc_devconnect_ack()]
+ * and that becomes it's address [X < 128] or its unauthorized address
+ * [X | 0x80].
+ *
+ * We add 1 as an offset to the one-based USB-stack port number
+ * (zero-based wusb virtual port index) for two reasons: (a) dev addr
+ * 0 is reserved by USB for default address; (b) Linux's USB stack
+ * uses always #1 for the root hub of the controller. So USB stack's
+ * port #1, which is wusb virtual-port #0 has address #2.
+ */
static void choose_address(struct usb_device *udev)
{
int devnum;
struct usb_bus *bus = udev->bus;
/* If khubd ever becomes multithreaded, this will need a lock */
-
- /* Try to allocate the next devnum beginning at bus->devnum_next. */
- devnum = find_next_zero_bit(bus->devmap.devicemap, 128,
- bus->devnum_next);
- if (devnum >= 128)
- devnum = find_next_zero_bit(bus->devmap.devicemap, 128, 1);
-
- bus->devnum_next = ( devnum >= 127 ? 1 : devnum + 1);
-
+ if (udev->wusb) {
+ devnum = udev->portnum + 1;
+ BUG_ON(test_bit(devnum, bus->devmap.devicemap));
+ } else {
+ /* Try to allocate the next devnum beginning at
+ * bus->devnum_next. */
+ devnum = find_next_zero_bit(bus->devmap.devicemap, 128,
+ bus->devnum_next);
+ if (devnum >= 128)
+ devnum = find_next_zero_bit(bus->devmap.devicemap,
+ 128, 1);
+ bus->devnum_next = ( devnum >= 127 ? 1 : devnum + 1);
+ }
if (devnum < 128) {
set_bit(devnum, bus->devmap.devicemap);
udev->devnum = devnum;
}
}
+static void update_address(struct usb_device *udev, int devnum)
+{
+ /* The address for a WUSB device is managed by wusbcore. */
+ if (!udev->wusb)
+ udev->devnum = devnum;
+}
+
#ifdef CONFIG_USB_SUSPEND
static void usb_stop_pm(struct usb_device *udev)
int i;
if (!udev) {
- pr_debug ("%s nodev\n", __FUNCTION__);
+ pr_debug ("%s nodev\n", __func__);
return;
}
usb_unlock_device(udev);
+ /* Remove the device-specific files from sysfs. This must be
+ * done with udev unlocked, because some of the attribute
+ * routines try to acquire the device lock.
+ */
+ usb_remove_sysfs_dev_files(udev);
+
/* Unregister the device. The device driver is responsible
* for removing the device files from usbfs and sysfs and for
* de-configuring the device.
goto fail;
}
+ /* put device-specific files into sysfs */
+ usb_create_sysfs_dev_files(udev);
+
/* Tell the world! */
announce_device(udev);
return err;
case 0:
/* TRSTRCY = 10 ms; plus some extra */
msleep(10 + 40);
- udev->devnum = 0; /* Device now at address 0 */
+ update_address(udev, 0);
/* FALL THROUGH */
case -ENOTCONN:
case -ENODEV:
}
clear_bit(port1, hub->busy_bits);
- if (!hub->hdev->parent && !hub->busy_bits[0])
- usb_enable_root_hub_irq(hub->hdev->bus);
if (status == 0)
status = finish_port_resume(udev);
}
}
- dev_dbg(&intf->dev, "%s\n", __FUNCTION__);
+ dev_dbg(&intf->dev, "%s\n", __func__);
/* stop khubd and related activity */
hub_quiesce(hub);
return portstatus;
}
-static void ep0_reinit(struct usb_device *udev)
+void usb_ep0_reinit(struct usb_device *udev)
{
usb_disable_endpoint(udev, 0 + USB_DIR_IN);
usb_disable_endpoint(udev, 0 + USB_DIR_OUT);
usb_enable_endpoint(udev, &udev->ep0);
}
+EXPORT_SYMBOL_GPL(usb_ep0_reinit);
#define usb_sndaddr0pipe() (PIPE_CONTROL << 30)
#define usb_rcvaddr0pipe() ((PIPE_CONTROL << 30) | USB_DIR_IN)
USB_REQ_SET_ADDRESS, 0, devnum, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
if (retval == 0) {
- udev->devnum = devnum; /* Device now using proper address */
+ /* Device now using proper address. */
+ update_address(udev, devnum);
usb_set_device_state(udev, USB_STATE_ADDRESS);
- ep0_reinit(udev);
+ usb_ep0_reinit(udev);
}
return retval;
}
#undef GET_DESCRIPTOR_BUFSIZE
}
- for (j = 0; j < SET_ADDRESS_TRIES; ++j) {
- retval = hub_set_address(udev, devnum);
- if (retval >= 0)
+ /*
+ * If device is WUSB, we already assigned an
+ * unauthorized address in the Connect Ack sequence;
+ * authorization will assign the final address.
+ */
+ if (udev->wusb == 0) {
+ for (j = 0; j < SET_ADDRESS_TRIES; ++j) {
+ retval = hub_set_address(udev, devnum);
+ if (retval >= 0)
+ break;
+ msleep(200);
+ }
+ if (retval < 0) {
+ dev_err(&udev->dev,
+ "device not accepting address %d, error %d\n",
+ devnum, retval);
+ goto fail;
+ }
+
+ /* cope with hardware quirkiness:
+ * - let SET_ADDRESS settle, some device hardware wants it
+ * - read ep0 maxpacket even for high and low speed,
+ */
+ msleep(10);
+ if (USE_NEW_SCHEME(retry_counter))
break;
- msleep(200);
- }
- if (retval < 0) {
- dev_err(&udev->dev,
- "device not accepting address %d, error %d\n",
- devnum, retval);
- goto fail;
- }
-
- /* cope with hardware quirkiness:
- * - let SET_ADDRESS settle, some device hardware wants it
- * - read ep0 maxpacket even for high and low speed,
- */
- msleep(10);
- if (USE_NEW_SCHEME(retry_counter))
- break;
+ }
retval = usb_get_device_descriptor(udev, 8);
if (retval < 8) {
if (retval)
goto fail;
- i = udev->descriptor.bMaxPacketSize0 == 0xff?
+ i = udev->descriptor.bMaxPacketSize0 == 0xff? /* wusb device? */
512 : udev->descriptor.bMaxPacketSize0;
if (le16_to_cpu(udev->ep0.desc.wMaxPacketSize) != i) {
if (udev->speed != USB_SPEED_FULL ||
}
dev_dbg(&udev->dev, "ep0 maxpacket = %d\n", i);
udev->ep0.desc.wMaxPacketSize = cpu_to_le16(i);
- ep0_reinit(udev);
+ usb_ep0_reinit(udev);
}
retval = usb_get_device_descriptor(udev, USB_DT_DEVICE_SIZE);
fail:
if (retval) {
hub_port_disable(hub, port1, 0);
- udev->devnum = devnum; /* for disconnect processing */
+ update_address(udev, devnum); /* for disconnect processing */
}
mutex_unlock(&usb_address0_mutex);
return retval;
udev->speed = USB_SPEED_UNKNOWN;
udev->bus_mA = hub->mA_per_port;
udev->level = hdev->level + 1;
+ udev->wusb = hub_is_wusb(hub);
/* set the address */
choose_address(udev);
loop_disable:
hub_port_disable(hub, port1, 1);
loop:
- ep0_reinit(udev);
+ usb_ep0_reinit(udev);
release_address(udev);
usb_put_dev(udev);
if ((status == -ENOTCONN) || (status == -ENOTSUPP))
break;
}
+ if (hub->hdev->parent ||
+ !hcd->driver->port_handed_over ||
+ !(hcd->driver->port_handed_over)(hcd, port1))
+ dev_err(hub_dev, "unable to enumerate USB device on port %d\n",
+ port1);
done:
hub_port_disable(hub, port1, 1);
hub->activating = 0;
- /* If this is a root hub, tell the HCD it's okay to
- * re-enable port-change interrupts now. */
- if (!hdev->parent && !hub->busy_bits[0])
- usb_enable_root_hub_irq(hdev->bus);
-
loop_autopm:
/* Allow autosuspend if we're not going to run again */
if (list_empty(&hub->event_list))
if (!parent_hdev) {
/* this requires hcd-specific logic; see OHCI hc_restart() */
- dev_dbg(&udev->dev, "%s for root hub!\n", __FUNCTION__);
+ dev_dbg(&udev->dev, "%s for root hub!\n", __func__);
return -EISDIR;
}
parent_hub = hdev_to_hub(parent_hdev);
/* ep0 maxpacket size may change; let the HCD know about it.
* Other endpoints will be handled by re-enumeration. */
- ep0_reinit(udev);
+ usb_ep0_reinit(udev);
ret = hub_port_init(parent_hub, udev, port1, i);
if (ret >= 0 || ret == -ENOTCONN || ret == -ENODEV)
break;
}
clear_bit(port1, parent_hub->busy_bits);
- if (!parent_hdev->parent && !parent_hub->busy_bits[0])
- usb_enable_root_hub_irq(parent_hdev->bus);
if (ret < 0)
goto re_enumerate;
projects / linux-2.6 / blobdiff