Table of Contents
Advertisement
Philips Semiconductors
2.3.
Core Modules
2.3.1.
Host Stack
The host stack consists of the Host Controller Driver (HCD) module. The driver is used for data transfer on the
USB bus for the connected devices. This driver can work in parallel with other HCDs
EHCI HCD)
present in the kernel. This is a kernel module and the Linux OS has support for USB, connected USB
device class drivers and suitable applications.
Mass Storage disk
Mass Storage bridge
Mass Storage class driver
USB protocol driver
Device Controller Driver
ISP1362 stack core modules
ISP1362 application modules
Linux kernel drivers
ISP1362 porting modules
2.3.2.
Device Stack
The device stack consists of the Device Controller Driver (DCD), the USB protocol driver, and the mass storage
class driver. The DCD is responsible for data transfer over the USB bus. The USB protocol driver responds to the
standard USB protocol requests. The mass storage class driver adds the mass storage functionality to the USB
device, and responds to the mass storage class commands and protocol. The mass storage needs to interface with
the physical mass storage device to perform its operations, and the physical disk is customer platform-specific and
UM10012-_2
User's Guide
emulation
ISP1362 Hardware Access Layer Driver
Figure 2-1: ISP1362 Linux Stack Architecture
OTG Mass storage demo/
OTG tools
Linux File System
OTG driver
ISP1362 Hardware
Rev. 1.2—July 2003
ISP1362 Linux Stack User's Guide
(OHCI HCD, UHCI HCD,
Linux operating system
Linux kernel
basic device drivers
USB class drivers
USB core
Host Controller Driver
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
7 of 34
Advertisement
Table of Contents
