usb_hub_info_t Struct Reference
[USB hub driver]

Information about attached hub. More...

#include <usbhub.h>

Data Fields
usb_hc_connection_t	connection
	connection to hcd
usb_pipe_t *	control_pipe
	convenience pointer to control pipe
bool	is_default_address_used
	default address is used indicator
size_t	pending_ops_count
	Number of pending operations on the mutex to prevent shooting ourselves in the foot.
fibril_condvar_t	pending_ops_cv
	Condition variable for pending_ops_count.
fibril_mutex_t	pending_ops_mutex
	Guard for pending_ops_count.
size_t	port_count
	Number of ports.
fibril_mutex_t	port_mutex
usb_hub_port_t *	ports
	attached device handles, for each port one
usb_pipe_t *	status_change_pipe
	convenience pointer to status change pipe
usb_device_t *	usb_device
	generic usb device data

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Detailed Description

Information about attached hub.

Definition at line 54 of file usbhub.h.

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Field Documentation

usb_pipe_t* control_pipe

convenience pointer to control pipe

Control pipe is initialized in usb_device structure. This is pointer into this structure, so that it does not have to be searched again and again for the 'right pipe'.

Definition at line 87 of file usbhub.h.

bool is_default_address_used

default address is used indicator

If default address is requested by this device, it cannot be requested by the same hub again, otherwise a deadlock will occur.

Definition at line 71 of file usbhub.h.

size_t pending_ops_count

Number of pending operations on the mutex to prevent shooting ourselves in the foot.

When the hub is disconnected but we are in the middle of some operation, we cannot destroy this structure right away because the pending operation might use it.

Definition at line 98 of file usbhub.h.

usb_pipe_t* status_change_pipe

convenience pointer to status change pipe

Status change pipe is initialized in usb_device structure. This is pointer into this structure, so that it does not have to be searched again and again for the 'right pipe'.

Definition at line 79 of file usbhub.h.

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The documentation for this struct was generated from the following file:

• doxygen-tmp/development_branch/uspace/drv/usbhub/usbhub.h

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