STRUCT USB_DEVICE(9) Host-Side Data Types and Macro STRUCT USB_DEVICE(9)NAMEstruct_usb_device - kernel´s representation of a USB device
SYNOPSIS
struct usb_device {
int devnum;
char devpath[16];
u32 route;
enum usb_device_state state;
enum usb_device_speed speed;
struct usb_tt * tt;
int ttport;
unsigned int toggle[2];
struct usb_device * parent;
struct usb_bus * bus;
struct usb_host_endpoint ep0;
struct device dev;
struct usb_device_descriptor descriptor;
struct usb_host_config * config;
struct usb_host_config * actconfig;
struct usb_host_endpoint * ep_in[16];
struct usb_host_endpoint * ep_out[16];
char ** rawdescriptors;
unsigned short bus_mA;
u8 portnum;
u8 level;
unsigned can_submit:1;
unsigned discon_suspended:1;
unsigned persist_enabled:1;
unsigned have_langid:1;
unsigned authorized:1;
unsigned authenticated:1;
unsigned wusb:1;
#ifndef __GENKSYMS__
unsigned lpm_capable:1;
unsigned usb2_hw_lpm_capable:1;
unsigned usb2_hw_lpm_enabled:1;
#endif
int string_langid;
char * product;
char * manufacturer;
char * serial;
struct list_head filelist;
#ifdef CONFIG_USB_DEVICE_CLASS
struct device * usb_classdev;
#endif
#ifdef CONFIG_USB_DEVICEFS
struct dentry * usbfs_dentry;
#endif
int maxchild;
struct usb_device * children[USB_MAXCHILDREN];
int pm_usage_cnt;
u32 quirks;
atomic_t urbnum;
unsigned long active_duration;
#ifdef CONFIG_PM
struct delayed_work autosuspend;
struct work_struct autoresume;
struct mutex pm_mutex;
unsigned long last_busy;
int autosuspend_delay;
unsigned long connect_time;
unsigned auto_pm:1;
unsigned do_remote_wakeup:1;
unsigned reset_resume:1;
unsigned autosuspend_disabled:1;
unsigned autoresume_disabled:1;
unsigned skip_sys_resume:1;
#endif
struct wusb_dev * wusb_dev;
int slot_id;
#ifndef __GENKSYMS__
struct usb_host_bos * bos;
struct usb3_lpm_parameters u1_params;
struct usb3_lpm_parameters u2_params;
unsigned lpm_disable_count;
#endif
};
MEMBERS
devnum
device number; address on a USB bus
devpath[16]
device ID string for use in messages (e.g., /port/...)
route
tree topology hex string for use with xHCI
state
device state: configured, not attached, etc.
speed
device speed: high/full/low (or error)
tt
Transaction Translator info; used with low/full speed dev,
highspeed hub
ttport
device port on that tt hub
toggle[2]
one bit for each endpoint, with ([0] = IN, [1] = OUT) endpoints
parent
our hub, unless we´re the root
bus
bus we´re part of
ep0
endpoint 0 data (default control pipe)
dev
generic device interface
descriptor
USB device descriptor
config
all of the device´s configs
actconfig
the active configuration
ep_in[16]
array of IN endpoints
ep_out[16]
array of OUT endpoints
rawdescriptors
raw descriptors for each config
bus_mA
Current available from the bus
portnum
parent port number (origin 1)
level
number of USB hub ancestors
can_submit
URBs may be submitted
discon_suspended
disconnected while suspended
persist_enabled
USB_PERSIST enabled for this device
have_langid
whether string_langid is valid
authorized
policy has said we can use it; (user space) policy determines if we
authorize this device to be used or not. By default, wired USB
devices are authorized. WUSB devices are not, until we authorize
them from user space. FIXME -- complete doc
authenticated
Crypto authentication passed
wusb
device is Wireless USB
lpm_capable
device supports LPM
usb2_hw_lpm_capable
device can perform USB2 hardware LPM
usb2_hw_lpm_enabled
USB2 hardware LPM enabled
string_langid
language ID for strings
product
iProduct string, if present (static)
manufacturer
iManufacturer string, if present (static)
serial
iSerialNumber string, if present (static)
filelist
usbfs files that are open to this device
usb_classdev
USB class device that was created for usbfs device access from
userspace
usbfs_dentry
usbfs dentry entry for the device
maxchild
number of ports if hub
children[USB_MAXCHILDREN]
child devices - USB devices that are attached to this hub
pm_usage_cnt
usage counter for autosuspend
quirks
quirks of the whole device
urbnum
number of URBs submitted for the whole device
active_duration
total time device is not suspended
autosuspend
for delayed autosuspends
autoresume
for autoresumes requested while in_interrupt
pm_mutex
protects PM operations
last_busy
time of last use
autosuspend_delay
in jiffies
connect_time
time device was first connected
auto_pm
autosuspend/resume in progress
do_remote_wakeup
remote wakeup should be enabled
reset_resume
needs reset instead of resume
autosuspend_disabled
autosuspend disabled by the user
autoresume_disabled
autoresume disabled by the user
skip_sys_resume
skip the next system resume
wusb_dev
if this is a Wireless USB device, link to the WUSB specific data
for the device.
slot_id
Slot ID assigned by xHCI
bos
USB device BOS descriptor set
u1_params
exit latencies for USB3 U1 LPM state, and hub-initiated timeout.
u2_params
exit latencies for USB3 U2 LPM state, and hub-initiated timeout.
lpm_disable_count
Ref count used by usb_disable_lpm and usb_enable_lpm to keep track
of the number of functions that require USB 3.0 Link Power
Management to be disabled for this usb_device. This count should
only be manipulated by those functions, with the bandwidth_mutex is
held.
NOTES
Usbcore drivers should not set usbdev->state directly. Instead use
usb_set_device_state.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 STRUCT USB_DEVICE(9)
