Texas Instruments TUSB5052 User manual

  

  



February 2004 MSDS Bus Solutions

User’s Guide

SLLU021A

IMPORTANT NOTICE

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TI warrants performance of its hardware products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI

deems necessary to support this warranty. Except where mandated by government requirements, testing of all

parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for

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Mailing Address: Texas Instruments

Post Office Box 655303 Dallas, Texas 75265

Notational Conventions

iii

Preface



About This Manual

This user’s guide contains pertinent information about the bootcode process

of the TUSB5052.

How to Use This Manual

This document contains the following chapters:

-Chapter 1—Introduction

-Chapter 2—TUSB5052 USB Firmware Flow

-Chapter 3—Function

-Chapter 4—Bootcode Defaults

-Chapter 5—Header Format and Vendor USB Request

-Chapter 6—Programming Considerations and Bootcode File List

Notational Conventions

This document uses the following conventions.

-Program listings, program examples, and interactive displays are shown

in a special typeface similar to a typewriter’s. Examples use a bold

version of the special typeface for emphasis; interactive displays use a

bold version of the special typeface to distinguish commands that you

enter from items that the system displays (such as prompts, command

output, error messages, etc.).

Here is a sample program listing:

0011 0005 0001 .field 1, 2

0012 0005 0003 .field 3, 4

0013 0005 0006 .field 6, 3

0014 0006 .even

Here is an example of a system prompt and a command that you might

enter:

C: csr −a /user/ti/simuboard/utilities

FCC Warning

-In syntax descriptions, the instruction, command, or directive is in a bold

typeface font and parameters are in an italic typeface. Portions of a syntax

that are in bold should be entered as shown; portions of a syntax that are

in italics describe the type of information that should be entered. Here is

an example of a directive syntax:

.asect ”section name”, address

.asect is the directive. This directive has two parameters, indicated by sec-

tion name and address. When you use .asect, the first parameter must be

an actual section name, enclosed in double quotes; the second parameter

must be an address.

-Square brackets ( [and ]) identify an optional parameter. If you use an

optional parameter, you specify the information within the brackets; you

don’t enter the brackets themselves. Here’s an example of an instruction

that has an optional parameter:

LALK 16-bit constant [, shift]

The LALK instruction has two parameters. The first parameter,16-bit con-

stant, is required. The second parameter, shift, is optional. As this syntax

shows, if you use the optional second parameter, you must precede it with

a comma.

Square brackets are also used as part of the pathname specification for

VMS pathnames; in this case, the brackets are actually part of the path-

name (they are not optional).

-Braces ( { and } ) indicate a list. The symbol |(read as or) separates items

within the list. Here’s an example of a list:

{ * | *+ | *− }

This provides three choices: *, *+, or *−.

Unless the list is enclosed in square brackets, you must choose one item

from the list.

-Some directives can have a varying number of parameters. For example,

the .byte directive can have up to 100 parameters. The syntax for this di-

rective is:

.byte value1[, ... , valuen]

This syntax shows that .byte must have at least one value parameter, but

you have the option of supplying additional value parameters, separated

by commas.

FCC Warning

This equipment is intended for use in a laboratory test environment only. It gen-

erates, uses, and can radiate radio frequency energy and has not been tested

for compliance with the limits of computing devices pursuant to subpart J of

part 15 of FCC rules, which are designed to provide reasonable protection

against radio frequency interference. Operation of this equipment in other en-

vironments may cause interference with radio communications, in which case

the user at his own expense will be required to take whatever measures may

be required to correct this interference.

Contents



1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Bootcode Main Program 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Interrupt Service Routine 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Control (Setup) Endpoint Handler 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Input Endpoint 0 Interrupt Handler 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 Output Endpoint 0 Handler 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6 Output Endpoint 1 Handler 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 TUSB5052 USB Firmware Flow 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Control Write Transfer With Data 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Control Write Without Data 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Control Read Transfer 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Function 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Bootcode Functional Module List 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.1 Bootcode.c File 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.2 I2C.c File 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.3 Header.c File 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Bootcode Defaults 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Default Hub Settings 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Default Bootcode Settings 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Header Format and Vendor USB Request 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Header Format 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.1 Product Signature 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.2 Descriptor 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.3 Descriptor Prefix 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1.4 Descriptor Content 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Examples 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2.1 USB Info Basic Descriptor 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Built-In Vendor-Specific USB Requests 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3.1 Get Bootcode Status 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3.2 Execute Firmware 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3.3 Get Firmware Revision 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3.4 Prepare for Header Update 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.4 Update Header 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 Reboot 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.6 Force Execute Firmware 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.7 External Memory Read 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

5.8 External Memory Write 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.9 I2C Memory Read 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.10 I2C Memory Write 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.11 Internal ROM Memory Read 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Programming Considerations and Bootcode File List 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 Programming Considerations 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1.1 USB Requests 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1.2 Interrupt Handling Routine 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2 File List 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.1 Bootcode.c Main Program 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.2 I2C.c I2C Routines 6-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.3 header.c I2C Header Routines 6-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.4 tusb5052.h UMP-Related Header File 6-38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.5 usb.h USB-Related Header File 6-52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.6 types.h Type Definition Header File 6-55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.7 i2c.h I2C-Related Header File 6-56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.8 header.h I2C Header-Process-Related Header File 6-58. . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

vii



1−1 Main Routine 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−2 Interrupt Service Routine 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−3 Control (Setup) Endpoint Handler 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−4 Input Endpoint 0 Interrupt Handler 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−5 Output Endpoint 0 Interrupt Handler 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−6 Output Endpoint 1 Interrupt Handler 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−1 Control Write Transfer With Data 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−2 Control Read Without Data 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−3 Control Read 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



2−1 Boot Code Response to Control Write Without Data 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−2 Boot Code Response to Control Read 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−1 Hub Descriptor 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−2 Device Descriptor 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−3 Configuration Descriptor 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−4 Interface Descriptor 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−5 Interrupt Endpoint 1 Descriptor 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−6 Device Descriptor 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−7 Configuration Descriptor 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−8 Interface Descriptor 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−9 Output Endpoint 1 Descriptor 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−1 USB Info Basic Descriptor 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−2 USB Info Basic and Firmware Basic Descriptor 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6−1 Vector Interrupt Values and Sources 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii

1-1

Introduction



Chapter 1 illustrates the bootcode process with bootcode flow charts. It

contains a description of the TUSB5052 bootcode document main program

and a flow chart of the interrupt service routine, control (setup) endpoint

handler, input endpoint 0 interrupt handler, output endpoint 0 handler, and the

output endpoint 1 handler.

Topic Page

1.1 Bootcode Main Program 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Interrupt Service Routine 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Control (Setup) Endpoint Handler 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Input Endpoint 0 Interrupt Handler 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 Output Endpoint 0 Handler 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6 Output Endpoint 1 Handler 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Bootcode Main Program

1-2

1.1 Bootcode Main Program

After power-on reset, the bootcode copies predefined USB descriptors to the

shared RAM. The first USB descriptor is the device descriptor. It describes the

embedded function class, vendor ID, product ID, etc. The second USB

descriptor is the configuration descriptor, which contains information such as

how the device is powered, the number of configurations available, type and

number of interfaces, and end-point descriptors. From these two descriptors,

Windows loads the necessary device drivers and performs pertinent actions.

Vendor and product IDs are crucial to the bootcode. Windows gets VID and

PID through the standard USB device request and then tries to match the two

IDs with its own database. If Windows finds them in the database, it loads the

corresponding device driver. If it is not able to match the IDs it provides a

prompt directing the user to provide the driver disks, which contain the INF

files.

Once the bootcode finishes copying descriptors, it looks for the EEPROM on

the I2C port. If a valid signature is found, it reads the data type byte. If the data

type is application code, it downloads the code to an external data space. Once

the code is loaded and the checksum is correct, bootcode releases control to

the application code. If the data contains USB device information, the

bootcode interprets the data and copies it to hub registers and to the

embedded function device descriptor, if the checksum is correct. If the data

does not contain USB device information, bootcode restores predefined

settings to the hub register and device descriptor.

After the bootcode updates the hub register and device descriptor, it sets up

for a USB transaction and connects itself to the USB. It remains there until the

host drivers download the application code. Once complete, it disconnects

from the USB and releases control to the application code. Figure 1−1

illustrates bootcode operation.

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