4 * Copyright (C) 2012 Intel Corp
6 * Author: Lan Tianyu <tianyu.lan@intel.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 #include <linux/slab.h>
20 #include <linux/pm_qos.h>
24 static const struct attribute_group *port_dev_group[];
26 static ssize_t show_port_connect_type(struct device *dev,
27 struct device_attribute *attr, char *buf)
29 struct usb_port *port_dev = to_usb_port(dev);
32 switch (port_dev->connect_type) {
33 case USB_PORT_CONNECT_TYPE_HOT_PLUG:
36 case USB_PORT_CONNECT_TYPE_HARD_WIRED:
39 case USB_PORT_NOT_USED:
47 return sprintf(buf, "%s\n", result);
49 static DEVICE_ATTR(connect_type, S_IRUGO, show_port_connect_type,
52 static struct attribute *port_dev_attrs[] = {
53 &dev_attr_connect_type.attr,
57 static struct attribute_group port_dev_attr_grp = {
58 .attrs = port_dev_attrs,
61 static const struct attribute_group *port_dev_group[] = {
66 static void usb_port_device_release(struct device *dev)
68 struct usb_port *port_dev = to_usb_port(dev);
70 usb_acpi_unregister_power_resources(dev);
74 #ifdef CONFIG_USB_SUSPEND
75 static int usb_port_runtime_resume(struct device *dev)
77 struct usb_port *port_dev = to_usb_port(dev);
78 struct usb_device *hdev = to_usb_device(dev->parent->parent);
79 struct usb_interface *intf = to_usb_interface(dev->parent);
82 usb_autopm_get_interface(intf);
83 retval = usb_hub_set_port_power(hdev, port_dev->portnum, true);
84 usb_autopm_put_interface(intf);
88 static int usb_port_runtime_suspend(struct device *dev)
90 struct usb_port *port_dev = to_usb_port(dev);
91 struct usb_device *hdev = to_usb_device(dev->parent->parent);
92 struct usb_interface *intf = to_usb_interface(dev->parent);
95 if (dev_pm_qos_flags(&port_dev->dev, PM_QOS_FLAG_NO_POWER_OFF)
99 usb_autopm_get_interface(intf);
100 retval = usb_hub_set_port_power(hdev, port_dev->portnum, false);
101 usb_autopm_put_interface(intf);
106 static const struct dev_pm_ops usb_port_pm_ops = {
107 #ifdef CONFIG_USB_SUSPEND
108 .runtime_suspend = usb_port_runtime_suspend,
109 .runtime_resume = usb_port_runtime_resume,
110 .runtime_idle = pm_generic_runtime_idle,
114 struct device_type usb_port_device_type = {
116 .release = usb_port_device_release,
117 .pm = &usb_port_pm_ops,
120 int usb_hub_create_port_device(struct usb_hub *hub, int port1)
122 struct usb_port *port_dev = NULL;
125 port_dev = kzalloc(sizeof(*port_dev), GFP_KERNEL);
131 hub->ports[port1 - 1] = port_dev;
132 port_dev->portnum = port1;
133 port_dev->dev.parent = hub->intfdev;
134 port_dev->dev.groups = port_dev_group;
135 port_dev->dev.type = &usb_port_device_type;
136 dev_set_name(&port_dev->dev, "port%d", port1);
138 retval = device_register(&port_dev->dev);
142 pm_runtime_set_active(&port_dev->dev);
143 pm_runtime_enable(&port_dev->dev);
145 retval = usb_acpi_register_power_resources(&port_dev->dev);
146 if (retval && retval != -ENODEV)
147 dev_warn(&port_dev->dev, "the port can't register its ACPI power resource.\n");
152 put_device(&port_dev->dev);
157 void usb_hub_remove_port_device(struct usb_hub *hub,
160 device_unregister(&hub->ports[port1 - 1]->dev);