drivers/usb/core/usb.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Released under the GPLv2 only.
   4  */
   5
   6 #include <linux/pm.h>
   7 #include <linux/acpi.h>
   8
   9 struct usb_hub_descriptor;
  10 struct usb_dev_state;
  11
  12 /* Functions local to drivers/usb/core/ */
  13
  14 extern int usb_create_sysfs_dev_files(struct usb_device *dev);
  15 extern void usb_remove_sysfs_dev_files(struct usb_device *dev);
  16 extern void usb_create_sysfs_intf_files(struct usb_interface *intf);
  17 extern void usb_remove_sysfs_intf_files(struct usb_interface *intf);
  18 extern int usb_create_ep_devs(struct device *parent,
  19                                 struct usb_host_endpoint *endpoint,
  20                                 struct usb_device *udev);
  21 extern void usb_remove_ep_devs(struct usb_host_endpoint *endpoint);
  22
  23 extern void usb_enable_endpoint(struct usb_device *dev,
  24                 struct usb_host_endpoint *ep, bool reset_toggle);
  25 extern void usb_enable_interface(struct usb_device *dev,
  26                 struct usb_interface *intf, bool reset_toggles);
  27 extern void usb_disable_endpoint(struct usb_device *dev, unsigned int epaddr,
  28                 bool reset_hardware);
  29 extern void usb_disable_interface(struct usb_device *dev,
  30                 struct usb_interface *intf, bool reset_hardware);
  31 extern void usb_release_interface_cache(struct kref *ref);
  32 extern void usb_disable_device(struct usb_device *dev, int skip_ep0);
  33 extern int usb_deauthorize_device(struct usb_device *);
  34 extern int usb_authorize_device(struct usb_device *);
  35 extern void usb_deauthorize_interface(struct usb_interface *);
  36 extern void usb_authorize_interface(struct usb_interface *);
  37 extern void usb_detect_quirks(struct usb_device *udev);
  38 extern void usb_detect_interface_quirks(struct usb_device *udev);
  39 extern void usb_release_quirk_list(void);
  40 extern bool usb_endpoint_is_ignored(struct usb_device *udev,
  41                 struct usb_host_interface *intf,
  42                 struct usb_endpoint_descriptor *epd);
  43 extern int usb_remove_device(struct usb_device *udev);
  44
  45 extern int usb_get_device_descriptor(struct usb_device *dev,
  46                 unsigned int size);
  47 extern int usb_set_isoch_delay(struct usb_device *dev);
  48 extern int usb_get_bos_descriptor(struct usb_device *dev);
  49 extern void usb_release_bos_descriptor(struct usb_device *dev);
  50 extern char *usb_cache_string(struct usb_device *udev, int index);
  51 extern int usb_set_configuration(struct usb_device *dev, int configuration);
  52 extern int usb_choose_configuration(struct usb_device *udev);
  53 extern int usb_generic_driver_probe(struct usb_device *udev);
  54 extern void usb_generic_driver_disconnect(struct usb_device *udev);
  55 extern int usb_generic_driver_suspend(struct usb_device *udev,
  56                 pm_message_t msg);
  57 extern int usb_generic_driver_resume(struct usb_device *udev,
  58                 pm_message_t msg);
  59
  60 static inline unsigned usb_get_max_power(struct usb_device *udev,
  61                 struct usb_host_config *c)
  62 {
  63         /* SuperSpeed power is in 8 mA units; others are in 2 mA units */
  64         unsigned mul = (udev->speed >= USB_SPEED_SUPER ? 8 : 2);
  65
  66         return c->desc.bMaxPower * mul;
  67 }
  68
  69 extern void usb_kick_hub_wq(struct usb_device *dev);
  70 extern int usb_match_one_id_intf(struct usb_device *dev,
  71                                  struct usb_host_interface *intf,
  72                                  const struct usb_device_id *id);
  73 extern int usb_match_device(struct usb_device *dev,
  74                             const struct usb_device_id *id);
  75 extern const struct usb_device_id *usb_device_match_id(struct usb_device *udev,
  76                                 const struct usb_device_id *id);
  77 extern bool usb_driver_applicable(struct usb_device *udev,
  78                                   struct usb_device_driver *udrv);
  79 extern void usb_forced_unbind_intf(struct usb_interface *intf);
  80 extern void usb_unbind_and_rebind_marked_interfaces(struct usb_device *udev);
  81
  82 extern void usb_hub_release_all_ports(struct usb_device *hdev,
  83                 struct usb_dev_state *owner);
  84 extern bool usb_device_is_owned(struct usb_device *udev);
  85
  86 extern int  usb_hub_init(void);
  87 extern void usb_hub_cleanup(void);
  88 extern int usb_major_init(void);
  89 extern void usb_major_cleanup(void);
  90 extern int usb_device_supports_lpm(struct usb_device *udev);
  91 extern int usb_port_disable(struct usb_device *udev);
  92
  93 #ifdef  CONFIG_PM
  94
  95 extern int usb_suspend(struct device *dev, pm_message_t msg);
  96 extern int usb_resume(struct device *dev, pm_message_t msg);
  97 extern int usb_resume_complete(struct device *dev);
  98
  99 extern int usb_port_suspend(struct usb_device *dev, pm_message_t msg);
 100 extern int usb_port_resume(struct usb_device *dev, pm_message_t msg);
 101
 102 extern void usb_autosuspend_device(struct usb_device *udev);
 103 extern int usb_autoresume_device(struct usb_device *udev);
 104 extern int usb_remote_wakeup(struct usb_device *dev);
 105 extern int usb_runtime_suspend(struct device *dev);
 106 extern int usb_runtime_resume(struct device *dev);
 107 extern int usb_runtime_idle(struct device *dev);
 108 extern int usb_enable_usb2_hardware_lpm(struct usb_device *udev);
 109 extern int usb_disable_usb2_hardware_lpm(struct usb_device *udev);
 110
 111 extern void usbfs_notify_suspend(struct usb_device *udev);
 112 extern void usbfs_notify_resume(struct usb_device *udev);
 113
 114 #else
 115
 116 static inline int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
 117 {
 118         return 0;
 119 }
 120
 121 static inline int usb_port_resume(struct usb_device *udev, pm_message_t msg)
 122 {
 123         return 0;
 124 }
 125
 126 #define usb_autosuspend_device(udev)            do {} while (0)
 127 static inline int usb_autoresume_device(struct usb_device *udev)
 128 {
 129         return 0;
 130 }
 131
 132 static inline int usb_enable_usb2_hardware_lpm(struct usb_device *udev)
 133 {
 134         return 0;
 135 }
 136
 137 static inline int usb_disable_usb2_hardware_lpm(struct usb_device *udev)
 138 {
 139         return 0;
 140 }
 141
 142 #endif
 143
 144 extern struct bus_type usb_bus_type;
 145 extern struct mutex usb_port_peer_mutex;
 146 extern struct device_type usb_device_type;
 147 extern struct device_type usb_if_device_type;
 148 extern struct device_type usb_ep_device_type;
 149 extern struct device_type usb_port_device_type;
 150 extern struct usb_device_driver usb_generic_driver;
 151
 152 static inline int is_usb_device(const struct device *dev)
 153 {
 154         return dev->type == &usb_device_type;
 155 }
 156
 157 static inline int is_usb_interface(const struct device *dev)
 158 {
 159         return dev->type == &usb_if_device_type;
 160 }
 161
 162 static inline int is_usb_endpoint(const struct device *dev)
 163 {
 164         return dev->type == &usb_ep_device_type;
 165 }
 166
 167 static inline int is_usb_port(const struct device *dev)
 168 {
 169         return dev->type == &usb_port_device_type;
 170 }
 171
 172 static inline int is_root_hub(struct usb_device *udev)
 173 {
 174         return (udev->parent == NULL);
 175 }
 176
 177 /* Do the same for device drivers and interface drivers. */
 178
 179 static inline int is_usb_device_driver(struct device_driver *drv)
 180 {
 181         return container_of(drv, struct usbdrv_wrap, driver)->
 182                         for_devices;
 183 }
 184
 185 /* for labeling diagnostics */
 186 extern const char *usbcore_name;
 187
 188 /* sysfs stuff */
 189 extern const struct attribute_group *usb_device_groups[];
 190 extern const struct attribute_group *usb_interface_groups[];
 191
 192 /* usbfs stuff */
 193 extern struct usb_driver usbfs_driver;
 194 extern const struct file_operations usbfs_devices_fops;
 195 extern const struct file_operations usbdev_file_operations;
 196
 197 extern int usb_devio_init(void);
 198 extern void usb_devio_cleanup(void);
 199
 200 /*
 201  * Firmware specific cookie identifying a port's location. '0' == no location
 202  * data available
 203  */
 204 typedef u32 usb_port_location_t;
 205
 206 /* internal notify stuff */
 207 extern void usb_notify_add_device(struct usb_device *udev);
 208 extern void usb_notify_remove_device(struct usb_device *udev);
 209 extern void usb_notify_add_bus(struct usb_bus *ubus);
 210 extern void usb_notify_remove_bus(struct usb_bus *ubus);
 211 extern void usb_hub_adjust_deviceremovable(struct usb_device *hdev,
 212                 struct usb_hub_descriptor *desc);
 213
 214 #ifdef CONFIG_ACPI
 215 extern int usb_acpi_register(void);
 216 extern void usb_acpi_unregister(void);
 217 extern acpi_handle usb_get_hub_port_acpi_handle(struct usb_device *hdev,
 218         int port1);
 219 #else
 220 static inline int usb_acpi_register(void) { return 0; };
 221 static inline void usb_acpi_unregister(void) { };
 222 #endif