247 lines
7.5 KiB
Plaintext
247 lines
7.5 KiB
Plaintext
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This is the readme for the Das U-Boot standalone program smc91111
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The main purpose of this is to manage MAC addresses on platforms
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which include the SMC91111 integrated 10/100 MAC Phy, with attached
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EEPROMs.
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Contents:
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------------------------
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1. Ensuring U-boot's MAC address can be set in hardware
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2. Running the smc91111_eeprom program
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3. Setting MAC addresses
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4. Other things you can do with this
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5. Things to be done.
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1. Ensuring U-boot's MAC address can be set in hardware
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--------------------------------------------------------------------------
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On the Internet - MAC addresses are very important. Short for Media
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Access Control address, a hardware address that uniquely identifies
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each node of a network. When things are not unique - bad things
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can happen. This is why U-Boot makes it difficult to change MAC
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addresses.
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To find out who has a MAC address, or to purchase MAC addresses, goto
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the IEEE, at:
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http://standards.ieee.org/regauth/oui/index.shtml
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To change your MAC address, there can not be a MAC address predefined in
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U-Boot. To ensure that this does not occur, check your
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include/configs/<board_name>.h file, and check to see that the following
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settings are _not_ or commented out there.
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#define HARDCODE_MAC 1
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#define CONFIG_ETHADDR 02:80:ad:20:31:b8
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The purpose of HARDCODE_MAC is to hardcode the MAC address in software,
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(not what we want), or to preset it to 02:80:ad:20:31:b8 (not what we
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want either).
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You can check this in a running U-Boot, by doing a power cycle, then
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before U-Boot tries to do any networking, running the 'printenv' command
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BOOT> printenv
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ethaddr=02:80:ad:20:31:b8
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If you see the 'ethaddr' variable show up, like the above, you need to
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recompile U-Boot, with the above settings commented out of the
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include/configs/<board_name>.h file.
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2. Running the smc91111_eeprom program
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---------------------------------------------------------------------
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After Uboot is compiled, there should be three files of interest:
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-rwxr-xr-x 1 8806 2004-10-11 14:00 smc91111_eeprom <- ELF
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-rwxr-xr-x 1 3440 2004-10-11 14:00 smc91111_eeprom.bin <- BIN
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-rwxr-xr-x 1 9524 2004-10-11 14:00 smc91111_eeprom.srec <- SREC
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if there is not, check the examples/Makefile, and ensure there is something
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like for your architecture:
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ifeq ($(ARCH),blackfin)
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SREC += smc91111_eeprom.srec
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BIN += smc91111_eeprom.bin smc91111_eeprom
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endif
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To load the files: there are two methods: a) serial or b) network. Since
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it is not a good idea to start doing things on the network before the
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MAC address is set, this example will do things over serial.
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a) Loading the elf file via the serial port
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--------------------------------------------
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Loading the elf is very easy - just ensure that the location
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you specify things to load as is not the load address specified
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in the Makefile.
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BOOT> loadb 0x1000000
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## Ready for binary (kermit) download to 0x01000000 at 57600 bps...
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(type CNTL-\ then C)
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(Back at local machine)
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----------------------------------------------------
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Kermit>send ~/u-boot_1.1.1/examples/smc91111_eeprom
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Kermit>connect
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Connecting to /dev/ttyS0, speed 57600
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Escape character: Ctrl-\ (ASCII 28, FS): enabled
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Type the escape character followed by C to get back,
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or followed by ? to see other options.
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----------------------------------------------------
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## Total Size = 0x00002266 = 8806 Bytes
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## Start Addr = 0x01000000
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BOOT> bootelf 0x1000000
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Loading .text @ 0x00001000 (3440 bytes)
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## Starting application at 0x000010d8 ...
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SMC91111>
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b) Loading the binary file via the serial port
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-----------------------------------------------
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For many toolchains, the entry point is not the load point.
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The Load point is a hard coded address from the
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examples/Makefile. The entry point can be found by doing something
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like:
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u-boot_1.1.1/examples> bfin-elf-objdump -d smc91111_eeprom |less
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smc91111_eeprom: file format elf32-bfin
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Disassembly of section .text:
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00001000 <smc91111_eeprom-0xd8>:
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1000:
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000010d8 <smc91111_eeprom>:
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You can see that the entry point (or the address that should be
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jumped to is 0x10d8). This is also the same as the entry point
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of the elf file.
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Now we load it to the actual load location:
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BOOT> loadb 0x1000
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## Ready for binary (kermit) download to 0x00001000 at 57600 bps...
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(Back at pinky.dsl-only.net)
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----------------------------------------------------
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Kermit>send /tftpboot/eeprom.bin
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Kermit>connect
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Connecting to /dev/ttyS0, speed 57600
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Escape character: Ctrl-\ (ASCII 28, FS): enabled
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Type the escape character followed by C to get back,
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or followed by ? to see other options.
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----------------------------------------------------
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## Total Size = 0x00000d70 = 3440 Bytes
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## Start Addr = 0x00001000
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BOOT> go 0x10D8
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## Starting application at 0x000010D8 ...
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SMC91111>
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3. Setting MAC addresses
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--------------------------------------------------------------------------
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The MAC address can be stored in four locations:
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-Boot environmental variable in Flash <- can not change, without
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re-flashing U-boot.
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U-Boot environental variable <- can not change, without
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resetting board/U-Boot
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LAN91C111 Registers <- volitle
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LAN91C111 EEPROM <- Non Volitle
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If you have not activated the network, and do not have a hardcoded
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or pre-assigned MAC address in U-boot, the environmental variables
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should be blank, and allow you to set things one time.
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To set the EEPROM MAC address to 12:34:56:78:9A:BC
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SMC91111> W E 20 3412
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Writing EEPROM register 20 with 3412
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SMC91111> W E 21 7856
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Writing EEPROM register 21 with 7856
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SMC91111> W E 22 BC9A
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Writing EEPROM register 22 with bc9a
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EEPROM contents copied to MAC
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SMC91111> P
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Current MAC Address in SMSC91111 12:34:56:78:9a:bc
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Current MAC Address in EEPROM 12:34:56:78:9a:bc
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(CNTRL-C to exit)
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SMC91111> ## Application terminated, rc = 0x0
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BOOT> reset
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U-Boot 1.1.1 (gcc version: 3.3.3)
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Release Version Beta released on Oct 10 2004 - 00:34:35
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Blackfin support by LG Soft India
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For further information please check this link http://www.blackfin.uclinux.org
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BOOT> ping 192.168.0.4
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Using MAC Address 12:34:56:78:9A:BC
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host 192.168.0.4 is alive
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4. Other things that you can do
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--------------------------------------------------------------------------
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After the stand alone application is running, there are a few options:
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- P : Print the MAC
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- D : Dump the LAN91C111 EEPROM contents
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- M : Dump the LAN91C111 MAC contents
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- C : Copies the MAC address from the EEPROM to the LAN91C111
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- W : Write a register in the EEPROM or in the MAC
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SMC91111> P
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Current MAC Address in SMSC91111 12:34:56:78:9a:bc
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Current MAC Address in EEPROM 12:34:56:78:9a:bc
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SMC91111> D
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IOS2-0 000 001 002 003 004 005 006 007
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CONFIG 00:ffff 04:ffff 08:ffff 0c:ffff 10:ffff 14:ffff 18:ffff 1c:ffff
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BASE 01:ffff 05:ffff 09:ffff 0d:ffff 11:ffff 15:ffff 19:ffff 1d:ffff
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02:ffff 06:ffff 0a:ffff 0e:0020 12:ffff 16:ffff 1a:ffff 1e:ffff
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03:ffff 07:ffff 0b:ffff 0f:ffff 13:ffff 17:ffff 1b:ffff 1f:ffff
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20:3412 21:7856 22:bc9a 23:ffff 24:ffff 25:ffff 26:ffff 27:ffff
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28:ffff 29:ffff 2a:ffff 2b:ffff 2c:ffff 2d:ffff 2e:ffff 2f:ffff
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30:ffff 31:ffff 32:ffff 33:ffff 34:ffff 35:ffff 36:ffff 37:ffff
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38:ffff 39:ffff 3a:ffff 3b:ffff 3c:ffff 3d:ffff 3e:ffff 3f:ffff
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SMC91111> M
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Bank0 Bank1 Bank2 Bank3
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00 0000 a0b1 3332 0000
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02 0000 1801 8000 0000
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04 0000 3412 8080 0000
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06 0000 7856 003f 0000
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08 0404 bc9a 02df 3332
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0a 0000 ffff 02df 3391
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0c 0000 1214 0004 001f
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0e 3300 3301 3302 3303
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SMC91111> C
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EEPROM contents copied to MAC
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SMC91111> W E 2A ABCD
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Writing EEPROM register 2a with abcd
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SMC91111> W M 14 FF00
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Writing MAC register bank 1, reg 04 with ff00
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