Micrel KSZ8692 Handbuch

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

Micrel KSZ8692 SPI Controller Programmer’s Guide

Version 1.0

07/18/2008

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

Table of Contents

1 Overview................................................................................................................................. 3

2 Atmel AT25160A EEPROM.................................................................................................. 4

2.1 Read/Write 1-byte From SPI device............................................................................... 4

2.2 Read/Write 4-byte From SPI device............................................................................... 6

3 Micrel KS8995M Switch........................................................................................................ 8

3.1 Read/Write 1-byte From SPI device............................................................................... 8

3.2 Read/Write 2-byte From SPI device............................................................................... 9

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

1 Overview

This document shows two examples of the programming sequences for the KSZ8692 SPI

controller when Linux u-boot SPI driver performs read/write data from/to SPI device.

The first SPI device is an Atmel AT25160A memory (EEPROM) which uses 2 byte

address offset and 8-bit data per transfer.

The second SPI device is a Micrel KS8995M switch which uses 1 byte address offset and

16-bit data per transfer.

Please refer to KSZ8692 datasheet for detail register programming information.

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

2 Atmel AT25160A EEPROM

The AT25160A memory (EEPROM) can be read/write through the SPI interface. It is organized

as 2048 words of 8 bits each with 2-byte address (A15-A0) offset.

The following examples shows how to read/write data from/to EPPROM address offset (2-byte)

under the Linux U-boot 1.1.4 “sspi” command. KS8692 SPI controller is configured as 8-bit data

per transfer and SPI mode 2.

2.1 Read/Write 1-byte From SPI device

Write 1-byte data ‘0x11’ to address offset 0x10

boot > sspi 0 8 021011

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_write_byte: regOffset=0010, length=1

write_enable: spi_tdr 1FFFE908:00068000

spi_issue_cmd: spi_tdr 1FFFE908:00020000

spi_write_byte: spi_tdr 1FFFE908:00100000

spi_write_byte: spi_tdr 1FFFE908:00000000

spi_write_byte: spi_tdr 1FFFE908:00118000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Write 1-byte data ‘0x22’ to address offset 0x11

boot > sspi 0 8 021122

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_write_byte: regOffset=0011, length=1

write_enable: spi_tdr 1FFFE908:00068000

spi_issue_cmd: spi_tdr 1FFFE908:00020000

spi_write_byte: spi_tdr 1FFFE908:00110000

spi_write_byte: spi_tdr 1FFFE908:00000000

spi_write_byte: spi_tdr 1FFFE908:00228000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Write 1-byte data ‘0x33’ to address offset 0x12

boot > sspi 0 8 021233

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_write_byte: regOffset=0012, length=1

write_enable: spi_tdr 1FFFE908:00068000

spi_issue_cmd: spi_tdr 1FFFE908:00020000

spi_write_byte: spi_tdr 1FFFE908:00120000

spi_write_byte: spi_tdr 1FFFE908:00000000

spi_write_byte: spi_tdr 1FFFE908:00338000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Write 1-byte data ‘0x44’ to address offset 0x13

boot > sspi 0 8 021344

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_write_byte: regOffset=0013, length=1

write_enable: spi_tdr 1FFFE908:00068000

spi_issue_cmd: spi_tdr 1FFFE908:00020000

spi_write_byte: spi_tdr 1FFFE908:00130000

spi_write_byte: spi_tdr 1FFFE908:00000000

spi_write_byte: spi_tdr 1FFFE908:00448000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Read 1-byte data from dress offset 0x10

boot > sspi 0 8 0310

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_byte: regOffset=0010, length=1

spi_issue_cmd: spi_tdr 1FFFE908:00030000

spi_read_byte: spi_tdr 1FFFE908:00100000

spi_read_byte: spi_tdr 1FFFE908:0000a001

spi_read_byte: spi_rdr 1FFFE904:00110000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Read 1-byte data from dress offset 0x11

boot > sspi 0 8 0311

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_byte: regOffset=0011, length=1

spi_issue_cmd: spi_tdr 1FFFE908:00030000

spi_read_byte: spi_tdr 1FFFE908:00110000

spi_read_byte: spi_tdr 1FFFE908:0000a001

spi_read_byte: spi_rdr 1FFFE904:00220000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Read 1-byte data from dress offset 0x12

boot > sspi 0 8 0312

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_byte: regOffset=0012, length=1

spi_issue_cmd: spi_tdr 1FFFE908:00030000

spi_read_byte: spi_tdr 1FFFE908:00120000

spi_read_byte: spi_tdr 1FFFE908:0000a001

spi_read_byte: spi_rdr 1FFFE904:00330000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Read 1-byte data from dress offset 0x13

boot > sspi 0 8 0313

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_byte: regOffset=0013, length=1

spi_issue_cmd: spi_tdr 1FFFE908:00030000

spi_read_byte: spi_tdr 1FFFE908:00130000

spi_read_byte: spi_tdr 1FFFE908:0000a001

spi_read_byte: spi_rdr 1FFFE904:00440000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

2.2 Read/Write 4-byte From SPI device

Write 4-byte data ‘0x12345678’ to address offset 0x20

boot > sspi 0 32 022012345678

spi_reset: spi_ctr 1FFFE900:80000000

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_write_byte: regOffset=0020, length=4

write_enable: spi_tdr 1FFFE908:00068000

spi_issue_cmd: spi_tdr 1FFFE908:00020000

spi_write_byte: spi_tdr 1FFFE908:00200000

spi_write_byte: spi_tdr 1FFFE908:00000000

spi_write_byte: spi_tdr 1FFFE908:00120000

spi_write_byte: spi_tdr 1FFFE908:00340000

spi_write_byte: spi_tdr 1FFFE908:00560000

spi_write_byte: spi_tdr 1FFFE908:00788000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Read 4-byte data from dress offset 0x20

boot > sspi 0 32 0320

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:98880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_byte: regOffset=0020, length=4

spi_issue_cmd: spi_tdr 1FFFE908:00030000

spi_read_byte: spi_tdr 1FFFE908:00200000

spi_read_byte: spi_tdr 1FFFE908:0000a004

spi_read_byte: spi_rdr 1FFFE904:00120000

spi_read_byte: spi_rdr 1FFFE904:00340000

spi_read_byte: spi_rdr 1FFFE904:00560000

spi_read_byte: spi_rdr 1FFFE904:00780000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

12345678

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

3 Micrel KS8995M Switch

The Micrel KS8995M switch can be configured through the SPI interface

. It uses 1 byte of

address offset and 16-bit data per transfer.

The following examples shows how to read/write data from/to KS8995M switch register offset

(1-byte) under U-boot 1.1.4 “sspi” command. KS8692 SPI controller is configured as 16-bit data

per transfer, and SPI mode 0.

3.1 Read/Write 1-byte From SPI device

Write 1-byte data ‘0x12’ to address offset 0x68

boot > sspi 0 8 026812

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:18880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_write_word: regOffset=68, length=1

spi_write_word: spi_tdr 1FFFE908:02680800

spi_write_word: spi_tdr 1FFFE908:12000800

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Write 1-byte data ‘0x34’ to address offset 0x69

boot > sspi 0 8 026934

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:18880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_write_word: regOffset=69, length=1

spi_write_word: spi_tdr 1FFFE908:02690800

spi_write_word: spi_tdr 1FFFE908:34340800

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Read 1-byte data from dress offset 0x68

boot > sspi 0 8 0368

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:18880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_word: regOffset=68, length=1

Set KS8995 SPI to slave mode when access from KS8692 SPI controller.

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

spi_read_word: spi_tdr 1FFFE908:0368a801

spi_read_word: spi_rdr 1FFFE904:12340000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Read 1-byte data from dress offset 0x69

boot > sspi 0 8 0369

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:18880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_word: regOffset=69, length=1

spi_read_word: spi_tdr 1FFFE908:0369a801

spi_read_word: spi_rdr 1FFFE904:34340000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

3.2 Read/Write 2-byte From SPI device

Write 2-byte data ‘0x5678’ to address offset 0x6A

boot > sspi 0 16 026a5678

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:18880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_write_word: regOffset=6A, length=2

spi_write_word: spi_tdr 1FFFE908:026a0800

spi_write_word: spi_tdr 1FFFE908:56788800

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

Read 2-byte data from dress offset 0x06A

boot > sspi 0 16 036a

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:18880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_word: regOffset=6A, length=2

spi_read_word: spi_tdr 1FFFE908:036aa802

spi_read_word: spi_rdr 1FFFE904:56780000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

5678

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2008 Micrel Semiconductor

Micrel KSZ8692 SPI Controller

Programmer’s Guide

Read 2-byte data from dress offset 0x0

boot > sspi 0 16 0300

spi_reset: spi_ctr 1FFFE900:80000000

spi_init: spi_csr 1FFFE91C:18880101

spi_ks_chipsel: spi_ctr 1FFFE900:40000000

spi_read_word: regOffset=00, length=2

spi_read_word: spi_tdr 1FFFE908:0300a802

spi_read_word: spi_rdr 1FFFE904:95060000

spi_ks_chipsel: spi_ctr 1FFFE900:00000000

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