drivers/usb/core/usb.h

   1 /* Functions local to drivers/usb/core/ */
   2
   3 extern int usb_create_sysfs_dev_files (struct usb_device *dev);
   4 extern void usb_remove_sysfs_dev_files (struct usb_device *dev);
   5 extern int usb_create_sysfs_intf_files (struct usb_interface *intf);
   6 extern void usb_remove_sysfs_intf_files (struct usb_interface *intf);
   7 extern int usb_create_ep_files(struct device *parent, struct usb_host_endpoint *endpoint,
   8                                 struct usb_device *udev);
   9 extern void usb_remove_ep_files(struct usb_host_endpoint *endpoint);
  10
  11 extern void usb_disable_endpoint (struct usb_device *dev, unsigned int epaddr);
  12 extern void usb_disable_interface (struct usb_device *dev,
  13                 struct usb_interface *intf);
  14 extern void usb_release_interface_cache(struct kref *ref);
  15 extern void usb_disable_device (struct usb_device *dev, int skip_ep0);
  16
  17 extern int usb_get_device_descriptor(struct usb_device *dev,
  18                 unsigned int size);
  19 extern char *usb_cache_string(struct usb_device *udev, int index);
  20 extern int usb_set_configuration(struct usb_device *dev, int configuration);
  21
  22 extern void usb_kick_khubd(struct usb_device *dev);
  23 extern void usb_resume_root_hub(struct usb_device *dev);
  24
  25 extern int  usb_hub_init(void);
  26 extern void usb_hub_cleanup(void);
  27 extern int usb_major_init(void);
  28 extern void usb_major_cleanup(void);
  29 extern int usb_host_init(void);
  30 extern void usb_host_cleanup(void);
  31
  32 #ifdef  CONFIG_PM
  33
  34 extern int usb_suspend_both(struct usb_device *udev, pm_message_t msg);
  35 extern int usb_resume_both(struct usb_device *udev);
  36 extern int usb_port_suspend(struct usb_device *dev);
  37 extern int usb_port_resume(struct usb_device *dev);
  38
  39 static inline void usb_pm_lock(struct usb_device *udev)
  40 {
  41         mutex_lock_nested(&udev->pm_mutex, udev->level);
  42 }
  43
  44 static inline void usb_pm_unlock(struct usb_device *udev)
  45 {
  46         mutex_unlock(&udev->pm_mutex);
  47 }
  48
  49 #else
  50
  51 #define usb_suspend_both(udev, msg)     0
  52 static inline int usb_resume_both(struct usb_device *udev)
  53 {
  54         return 0;
  55 }
  56 #define usb_port_suspend(dev)           0
  57 #define usb_port_resume(dev)            0
  58 static inline void usb_pm_lock(struct usb_device *udev) {}
  59 static inline void usb_pm_unlock(struct usb_device *udev) {}
  60
  61 #endif
  62
  63 #ifdef CONFIG_USB_SUSPEND
  64
  65 #define USB_AUTOSUSPEND_DELAY   (HZ*2)
  66
  67 extern void usb_autosuspend_device(struct usb_device *udev, int dec_busy_cnt);
  68 extern int usb_autoresume_device(struct usb_device *udev, int inc_busy_cnt);
  69
  70 #else
  71
  72 #define usb_autosuspend_device(udev, dec_busy_cnt)      do {} while (0)
  73 static inline int usb_autoresume_device(struct usb_device *udev,
  74                 int inc_busy_cnt)
  75 {
  76         return 0;
  77 }
  78
  79 #endif
  80
  81 extern struct workqueue_struct *ksuspend_usb_wq;
  82 extern struct bus_type usb_bus_type;
  83 extern struct usb_device_driver usb_generic_driver;
  84
  85 /* Here's how we tell apart devices and interfaces.  Luckily there's
  86  * no such thing as a platform USB device, so we can steal the use
  87  * of the platform_data field. */
  88
  89 static inline int is_usb_device(const struct device *dev)
  90 {
  91         return dev->platform_data == &usb_generic_driver;
  92 }
  93
  94 /* Do the same for device drivers and interface drivers. */
  95
  96 static inline int is_usb_device_driver(struct device_driver *drv)
  97 {
  98         return container_of(drv, struct usbdrv_wrap, driver)->
  99                         for_devices;
 100 }
 101
 102 /* Interfaces and their "power state" are owned by usbcore */
 103
 104 static inline void mark_active(struct usb_interface *f)
 105 {
 106         f->is_active = 1;
 107 }
 108
 109 static inline void mark_quiesced(struct usb_interface *f)
 110 {
 111         f->is_active = 0;
 112 }
 113
 114 static inline int is_active(const struct usb_interface *f)
 115 {
 116         return f->is_active;
 117 }
 118
 119
 120 /* for labeling diagnostics */
 121 extern const char *usbcore_name;
 122
 123 /* usbfs stuff */
 124 extern struct mutex usbfs_mutex;
 125 extern struct usb_driver usbfs_driver;
 126 extern const struct file_operations usbfs_devices_fops;
 127 extern const struct file_operations usbfs_device_file_operations;
 128 extern void usbfs_conn_disc_event(void);
 129
 130 extern int usbdev_init(void);
 131 extern void usbdev_cleanup(void);
 132
 133 struct dev_state {
 134         struct list_head list;      /* state list */
 135         struct usb_device *dev;
 136         struct file *file;
 137         spinlock_t lock;            /* protects the async urb lists */
 138         struct list_head async_pending;
 139         struct list_head async_completed;
 140         wait_queue_head_t wait;     /* wake up if a request completed */
 141         unsigned int discsignr;
 142         struct pid *disc_pid;
 143         uid_t disc_uid, disc_euid;
 144         void __user *disccontext;
 145         unsigned long ifclaimed;
 146         u32 secid;
 147 };
 148
 149 /* internal notify stuff */
 150 extern void usb_notify_add_device(struct usb_device *udev);
 151 extern void usb_notify_remove_device(struct usb_device *udev);
 152 extern void usb_notify_add_bus(struct usb_bus *ubus);
 153 extern void usb_notify_remove_bus(struct usb_bus *ubus);
 154