Usb Programming - HP Compaq dx6100 Series Technical Reference Manual

5.7.2 USB Programming

Programming the USB interface consists of configuration, which typically occurs during POST,
and control, which occurs at runtime.
USB Configuration
Each USB controller functions as a PCI device within the 82801 component and is configured
using PCI Configuration Registers as listed in Table 5-20.
NOTE:
PCI Config.
Address
00, 01h
02, 03h
04, 05h
06, 07h
08h
09h
0Ah
0Bh
Note:
[1] USB 1.1 #1= 24D2h
USB 1.1 #2 = 24D4h
USB 1.1 #3 = 24D7h
USB 1.1 #4 = 24DDh
USB 2.0
Technical Reference Guide
Table 5-20.
USB Interface Configuration Registers
Reset
Register Value
Vendor ID 8086h 0Eh
Device ID [1]
PCI Command 0000h 2C, 2Dh
PCI Status 0280h 3Ch
Revision ID 00h
Programming I/F 00h
Sub Class Code 03h
Base Class Code 0Ch
= 24DDh
361834-001
PCI Config.
Address Register
Header Type
20-23h I/O Space Base Address
Sub. Vender ID
Interrupt Line
3Dh Interrupt Pin
60h Serial Bus Release No.
C0, C1h USB Leg. Kybd./Ms. Cntrl.
C4h USB Resume Enable
Input/Output Interfaces
Reset
Value
00h
1d
00h
00h
03h
10h
2000h
00h
5-27