notes.txt

Usb1.1驱动c语言源代码

This is our TODO list, where you can see all pending issues:

USB-Core communication layer for user level USB-daemon support:

- USB Subsystem occupies 1 major device number
- Communication via proc-filesystem
-- Status reports and commands between the core and the daemon are piped through a virtual file
	Commands from daemon -> USB subsystem
	   

- dynamic assignment of minors
- bandwidth allocation has to be moved to select_interface
- automatic loading of device drivers through a list and daemon.
-- friendly device names should be assigned (as a link?)
-- device properties (name, load command) by automatically generated preferences list.
-- drivers for unknown devices are selected by descriptor or manual.

- Look for problems when connecting a hub with already connected devices
(maybe also hub/uhci-related!)

GA:

Ideas for dynamic device allocation:

Configuration File:

Generic		Vendor	DevID	Serial# IFs	driver		devname		flags

Generic: Audio, Mouse, Keyboard, HD, Printer all which can be determined by
DeviceClass etc.

Vendor:	  * | Hexcode | somewhere else defined alias
DevID:	  * | Hexcode 
Serial#:  * | Hexcode 
IFs:	  * | Hexcode 
driver:	  module name
devname:  name(n), first is taken if there are more than one matches, all
	  others are named by the convention name_aXX (a to show automatic assignment), 
          if name is without number, otherwise it should be numbered ascending.*
flags:	  e.g. Parameter for modules, callable user program after connecting
 	  with parameters for device(s) $1-$9 and userID,
	  exclusive: Devicename only to be allocated with this device
	  m: access mode (octal)
	  o: owner
	  g: group
	  
Hexcode: single Hexcode, liste with ',', or range with '-' or list of ranges.
Generic lines are located last in the file, specific single devices before.

*) What happens if devicename is already assigned?
Device names with numbers at the beginning of the list have to be omitted even
when counting up later.

Example:

#Generic	Vendor	DevID	Serial# IFs	driver		devname		flags

#include "usb-vendors.h"

# Flags to Control the daemon
.flags
DefaultMode: 600
DefaultOwner: root
DefaultGroup: root
ModulePath: /lib/modules/$VERSION/usb

# Preferences, to prevent devices from hobbing around
# can be configured by a user tool

.user
*		Anchor	9999	*	2	dabusb		dab		u="acher",start="acher:/usr/bin/dab $1"
*		Anchor	*	*	*	ezusb		ezusb		m=666
*		Philips 1035	*	*	usb-audio	dsp4,mixer4	m=666,start="/usr/local/bin/mix -d $2"

# Area for the daemon to store its connected devices to make sure
# they are at the same place after next connect

.history
USB-Audio	Philips 1035	0	0,1	usb-audio	dsp2,mixer2	exclusive

# General section, global definitions
.generic
USB-Audio	*	*	*	*	usb-audio	dsp,mixer	none
USB-Mouse	*	*	*	*	usb-mouse	mouse		none
USB-Printer	*	*	*	*	usb-printer	lp		none
*		Philips xxxx	*	*	usb-ph-video	video		none