usbhub.c File Reference

#include <stdlib.h>
#include <thread.h>
#include <usb_core_driver.h>
#include <usb_hub_defs.h>
#include <usb_hub_driver.h>
#include <usb_std_defs.h>
#include <core.h>

Data Structures
struct	usb_port
struct	usb_hub

Macros
#define	HUB_MAX_PORTS   16
#define	MAX_NUSBHUBS   16
#define	HUB_THREAD_STACK_SIZE   8192
#define	HUB_THREAD_PRIORITY   60
#define	HUB_THREAD_NAME   "USB hub thread"
#define	USB_PORT_RESET_TIMEOUT   800
#define	USB_PORT_RESET_DELAY   10

Functions
void	usb_hub_for_device_in_tree (struct usb_device *dev, usb_status_t(*callback)(struct usb_device *))

Variables
struct usb_device_driver	usb_hub_driver

Detailed Description

This file contains the USB (Universal Serial Bus) hub device driver.

Macro Definition Documentation

#define HUB_MAX_PORTS   16

Maximum number of ports per hub supported by this driver. (USB 2.0 theoretically allows up to 255 ports per hub.)

#define HUB_THREAD_NAME   "USB hub thread"

Name of USB hub thread.

#define HUB_THREAD_PRIORITY   60

Priority of USB hub thread. This should be fairly high so that changes in USB connectivity can be responded to quickly.

#define HUB_THREAD_STACK_SIZE   8192

Stack size of USB hub thread. This shouldn't need to be very large, but the hub thread can call into USB device drivers' bind_device and unbind_device callbacks.

#define MAX_NUSBHUBS   16

Maximum number of USB hubs that can be attached to the USB at the same time.

#define USB_PORT_RESET_DELAY   10

Milliseconds between each status check on the port while waiting for it to finish being reset (Linux uses several values, but 10 in the default case).

#define USB_PORT_RESET_TIMEOUT   800

Maximum milliseconds to wait for a port to reset (800 is the same value that Linux uses).