static int usb_port_runtime_suspend(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
struct usb_device *hdev = to_usb_device(dev->parent->parent);
struct usb_interface *intf = to_usb_interface(dev->parent);
struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
int port1 = port_dev->portnum;
int retval;
if (!hub)
return -EINVAL;
if (dev_pm_qos_flags(&port_dev->dev, PM_QOS_FLAG_NO_POWER_OFF)
== PM_QOS_FLAGS_ALL)
return -EAGAIN;
usb_autopm_get_interface(intf);
set_bit(port1, hub->busy_bits);
retval = usb_hub_set_port_power(hdev, hub, port1, false);
usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_CONNECTION);
usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_ENABLE);
clear_bit(port1, hub->busy_bits);
usb_autopm_put_interface(intf);
return retval;
}
static int usb_port_runtime_resume(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
struct usb_device *hdev = to_usb_device(dev->parent->parent);
struct usb_interface *intf = to_usb_interface(dev->parent);
struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
int port1 = port_dev->portnum;
int retval;
if (!hub)
return -EINVAL;
usb_autopm_get_interface(intf);
set_bit(port1, hub->busy_bits);
retval = usb_hub_set_port_power(hdev, port1, true);
if (port_dev->child && !retval) {
/*
* Attempt to wait for usb hub port to be reconnected in order
* to make the resume procedure successful. The device may have
* disconnected while the port was powered off, so ignore the
* return status.
*/
retval = hub_port_debounce_be_connected(hub, port1);
if (retval < 0)
dev_dbg(&port_dev->dev, "can't get reconnection after setting port power on, status %d\n",
retval);
usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_ENABLE);
retval = 0;
}
clear_bit(port1, hub->busy_bits);
usb_autopm_put_interface(intf);
return retval;
}
static void usb_port_device_release(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
kfree(port_dev->req);
kfree(port_dev);
}
static int usb_port_runtime_resume(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
struct usb_device *hdev = to_usb_device(dev->parent->parent);
struct usb_interface *intf = to_usb_interface(dev->parent);
struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
struct usb_device *udev = port_dev->child;
struct usb_port *peer = port_dev->peer;
int port1 = port_dev->portnum;
int retval;
if (!hub)
return -EINVAL;
if (hub->in_reset) {
set_bit(port1, hub->power_bits);
return 0;
}
/*
* Power on our usb3 peer before this usb2 port to prevent a usb3
* device from degrading to its usb2 connection
*/
if (!port_dev->is_superspeed && peer)
pm_runtime_get_sync(&peer->dev);
usb_autopm_get_interface(intf);
retval = usb_hub_set_port_power(hdev, hub, port1, true);
msleep(hub_power_on_good_delay(hub));
if (udev && !retval) {
/*
* Attempt to wait for usb hub port to be reconnected in order
* to make the resume procedure successful. The device may have
* disconnected while the port was powered off, so ignore the
* return status.
*/
retval = hub_port_debounce_be_connected(hub, port1);
if (retval < 0)
dev_dbg(&port_dev->dev, "can't get reconnection after setting port power on, status %d\n",
retval);
retval = 0;
/* Force the child awake to revalidate after the power loss. */
if (!test_and_set_bit(port1, hub->child_usage_bits)) {
pm_runtime_get_noresume(&port_dev->dev);
pm_request_resume(&udev->dev);
}
}
usb_autopm_put_interface(intf);
return retval;
}
static int usb_port_runtime_suspend(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
struct usb_device *hdev = to_usb_device(dev->parent->parent);
struct usb_interface *intf = to_usb_interface(dev->parent);
struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
struct usb_port *peer = port_dev->peer;
int port1 = port_dev->portnum;
int retval;
if (!hub)
return -EINVAL;
if (hub->in_reset)
return -EBUSY;
if (dev_pm_qos_flags(&port_dev->dev, PM_QOS_FLAG_NO_POWER_OFF)
== PM_QOS_FLAGS_ALL)
return -EAGAIN;
if (usb_port_block_power_off)
return -EBUSY;
usb_autopm_get_interface(intf);
retval = usb_hub_set_port_power(hdev, hub, port1, false);
usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_CONNECTION);
if (!port_dev->is_superspeed)
usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_ENABLE);
usb_autopm_put_interface(intf);
/*
* Our peer usb3 port may now be able to suspend, so
* asynchronously queue a suspend request to observe that this
* usb2 port is now off.
*/
if (!port_dev->is_superspeed && peer)
pm_runtime_put(&peer->dev);
return retval;
}
static int usb_port_runtime_resume(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
struct usb_device *hdev = to_usb_device(dev->parent->parent);
struct usb_interface *intf = to_usb_interface(dev->parent);
struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
int port1 = port_dev->portnum;
int retval;
if (!hub)
return -EINVAL;
usb_autopm_get_interface(intf);
set_bit(port1, hub->busy_bits);
retval = usb_hub_set_port_power(hdev, hub, port1, true);
if (port_dev->child && !retval) {
/*
* Wait for usb hub port to be reconnected in order to make
* the resume procedure successful.
*/
retval = hub_port_debounce_be_connected(hub, port1);
if (retval < 0) {
dev_dbg(&port_dev->dev, "can't get reconnection after setting port power on, status %d\n",
retval);
goto out;
}
usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_ENABLE);
/* Set return value to 0 if debounce successful */
retval = 0;
}
out:
clear_bit(port1, hub->busy_bits);
usb_autopm_put_interface(intf);
return retval;
}
static ssize_t show_port_connect_type(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_port *port_dev = to_usb_port(dev);
char *result;
switch (port_dev->connect_type) {
case USB_PORT_CONNECT_TYPE_HOT_PLUG:
result = "hotplug";
break;
case USB_PORT_CONNECT_TYPE_HARD_WIRED:
result = "hardwired";
break;
case USB_PORT_NOT_USED:
result = "not used";
break;
default:
result = "unknown";
break;
}
return sprintf(buf, "%s\n", result);
}
static struct acpi_device *usb_acpi_find_companion(struct device *dev)
{
int port1;
struct usb_device *udev;
acpi_handle *parent_handle;
/*
* In the ACPI DSDT table, only usb root hub and usb ports are
* acpi device nodes. The hierarchy like following.
* Device (EHC1)
* Device (HUBN)
* Device (PR01)
* Device (PR11)
* Device (PR12)
* Device (PR13)
* ...
* So all binding process is divided into two parts. binding
* root hub and usb ports.
*/
if (is_usb_device(dev)) {
udev = to_usb_device(dev);
port1 = udev->portnum;
if (udev->parent) {
struct usb_hub *hub;
hub = usb_hub_to_struct_hub(udev->parent);
/*
* According usb port's connect type to set usb device's
* removability.
*/
switch (hub->ports[port1 - 1]->connect_type) {
case USB_PORT_CONNECT_TYPE_HOT_PLUG:
udev->removable = USB_DEVICE_REMOVABLE;
break;
case USB_PORT_CONNECT_TYPE_HARD_WIRED:
udev->removable = USB_DEVICE_FIXED;
break;
default:
udev->removable = USB_DEVICE_REMOVABLE_UNKNOWN;
break;
}
return NULL;
}
/* root hub's parent is the usb hcd. */
return acpi_find_child_device(ACPI_COMPANION(dev->parent),
port1, false);
} else if (is_usb_port(dev)) {
struct usb_port *port_dev = to_usb_port(dev);
struct acpi_device *adev = NULL;
/* Get the struct usb_device point of port's hub */
udev = to_usb_device(dev->parent->parent);
port1 = port_dev->portnum;
/*
* The root hub ports' parent is the root hub. The non-root-hub
* ports' parent is the parent hub port which the hub is
* connected to.
*/
if (!udev->parent) {
struct usb_hcd *hcd = bus_to_hcd(udev->bus);
int raw;
raw = usb_hcd_find_raw_port_number(hcd, port1);
adev = acpi_find_child_device(ACPI_COMPANION(&udev->dev),
raw, false);
if (!adev)
return NULL;
} else {
parent_handle =
usb_get_hub_port_acpi_handle(udev->parent,
udev->portnum);
if (!parent_handle)
return NULL;
acpi_bus_get_device(parent_handle, &adev);
adev = acpi_find_child_device(adev, port1, false);
if (!adev)
return NULL;
}
usb_acpi_check_port_connect_type(udev, adev->handle, port1);
return adev;
}
return NULL;
}
