/* "Safely remove a device" */
static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_device *udev = to_usb_device(dev);
int rc = 0;
usb_lock_device(udev);
if (udev->state != USB_STATE_NOTATTACHED) {
/* To avoid races, first unconfigure and then remove */
usb_set_configuration(udev, -1);
rc = usb_remove_device(udev);
}
if (rc == 0)
rc = count;
usb_unlock_device(udev);
return rc;
}
static void usb_hub_port_connect_change(struct usb_device *dev, int port)
{
struct usb_device *usb;
struct usb_port_status portsts;
unsigned short portstatus, portchange;
/* Check status */
if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
dev_dbg(&dev->dev, "get_port_status failed\n");
return;
}
portstatus = le16_to_cpu(portsts.wPortStatus);
portchange = le16_to_cpu(portsts.wPortChange);
dev_dbg(&dev->dev, "portstatus %x, change %x, %s\n",
portstatus, portchange, portspeed(portstatus));
/* Clear the connection change status */
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
/* Disconnect any existing devices under this port */
if (dev->children[port] && !(portstatus & USB_PORT_STAT_CONNECTION)) {
dev_dbg(&dev->dev, "disconnect detected on port %d\n", port + 1);
usb_remove_device(dev->children[port]);
if (!dev->parent && dev->host->usbphy)
usb_phy_notify_disconnect(dev->host->usbphy, dev->speed);
return;
}
/* Remove disabled but connected devices */
if (dev->children[port] && !(portstatus & USB_PORT_STAT_ENABLE))
usb_remove_device(dev->children[port]);
mdelay(200);
/* Reset the port */
if (hub_port_reset(dev, port, &portstatus) < 0) {
dev_warn(&dev->dev, "cannot reset port %i!?\n", port + 1);
return;
}
mdelay(200);
/* Allocate a new device struct for it */
usb = usb_alloc_new_device();
usb->dev.parent = &dev->dev;
usb->host = dev->host;
if (portstatus & USB_PORT_STAT_HIGH_SPEED)
usb->speed = USB_SPEED_HIGH;
else if (portstatus & USB_PORT_STAT_LOW_SPEED)
usb->speed = USB_SPEED_LOW;
else
usb->speed = USB_SPEED_FULL;
dev->children[port] = usb;
usb->parent = dev;
usb->portnr = port + 1;
/* Run it through the hoops (find a driver, etc) */
if (usb_new_device(usb)) {
/* Woops, disable the port */
dev_dbg(&dev->dev, "hub: disabling port %d\n", port + 1);
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
usb_free_device(usb);
return;
}
if (!dev->parent && dev->host->usbphy)
usb_phy_notify_connect(dev->host->usbphy, usb->speed);
device_detect(&usb->dev);
}