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README.smc91111_eeprom
1 This is the readme for the Das U-Boot standalone program smc91111 2 3 The main purpose of this is to manage MAC addresses on platforms 4 which include the SMC91111 integrated 10/100 MAC Phy, with attached 5 EEPROMs. 6 7 8 Contents: 9 ------------------------ 10 1. Ensuring U-Boot's MAC address can be set in hardware 11 2. Running the smc91111_eeprom program 12 3. Setting MAC addresses 13 4. Other things you can do with this 14 5. Things to be done. 15 16 17 1. Ensuring U-Boot's MAC address can be set in hardware 18 -------------------------------------------------------------------------- 19 20 On the Internet - MAC addresses are very important. Short for Media 21 Access Control address, a hardware address that uniquely identifies 22 each node of a network. When things are not unique - bad things 23 can happen. This is why U-Boot makes it difficult to change MAC 24 addresses. 25 26 To find out who has a MAC address, or to purchase MAC addresses, goto 27 the IEEE, at: 28 http://standards.ieee.org/regauth/oui/index.shtml 29 30 2. Running the smc91111_eeprom program 31 --------------------------------------------------------------------- 32 33 After Uboot is compiled, there should be three files of interest: 34 -rwxr-xr-x 1 8806 2004-10-11 14:00 smc91111_eeprom <- ELF 35 -rwxr-xr-x 1 3440 2004-10-11 14:00 smc91111_eeprom.bin <- BIN 36 -rwxr-xr-x 1 9524 2004-10-11 14:00 smc91111_eeprom.srec <- SREC 37 38 if there is not, check the examples/Makefile, and ensure there is something 39 like for your architecture: 40 41 ifeq ($(ARCH),blackfin) 42 SREC += smc91111_eeprom.srec 43 BIN += smc91111_eeprom.bin smc91111_eeprom 44 endif 45 46 To load the files: there are two methods: a) serial or b) network. Since 47 it is not a good idea to start doing things on the network before the 48 MAC address is set, this example will do things over serial. 49 50 a) Loading the elf file via the serial port 51 -------------------------------------------- 52 Loading the elf is very easy - just ensure that the location 53 you specify things to load as is not the load address specified 54 in the Makefile. 55 56 BOOT> loadb 0x1000000 57 58 ## Ready for binary (kermit) download to 0x01000000 at 57600 bps... 59 60 (type CNTL-\ then C) 61 (Back at local machine) 62 ---------------------------------------------------- 63 Kermit>send ~/u-boot_1.1.1/examples/smc91111_eeprom 64 Kermit>connect 65 66 Connecting to /dev/ttyS0, speed 57600 67 Escape character: Ctrl-\ (ASCII 28, FS): enabled 68 Type the escape character followed by C to get back, 69 or followed by ? to see other options. 70 ---------------------------------------------------- 71 ## Total Size = 0x00002266 = 8806 Bytes 72 ## Start Addr = 0x01000000 73 74 BOOT> bootelf 0x1000000 75 76 Loading .text @ 0x00001000 (3440 bytes) 77 ## Starting application at 0x000010d8 ... 78 79 SMC91111> 80 81 b) Loading the binary file via the serial port 82 ----------------------------------------------- 83 For many toolchains, the entry point is not the load point. 84 The Load point is a hard coded address from the 85 examples/Makefile. The entry point can be found by doing something 86 like: 87 88 u-boot_1.1.1/examples> bfin-elf-objdump -d smc91111_eeprom |less 89 90 smc91111_eeprom: file format elf32-bfin 91 92 Disassembly of section .text: 93 94 00001000 <smc91111_eeprom-0xd8>: 95 1000: 96 000010d8 <smc91111_eeprom>: 97 98 You can see that the entry point (or the address that should be 99 jumped to is 0x10d8). This is also the same as the entry point 100 of the elf file. 101 102 Now we load it to the actual load location: 103 104 BOOT> loadb 0x1000 105 106 ## Ready for binary (kermit) download to 0x00001000 at 57600 bps... 107 108 (Back at pinky.dsl-only.net) 109 ---------------------------------------------------- 110 Kermit>send /tftpboot/eeprom.bin 111 Kermit>connect 112 113 Connecting to /dev/ttyS0, speed 57600 114 Escape character: Ctrl-\ (ASCII 28, FS): enabled 115 Type the escape character followed by C to get back, 116 or followed by ? to see other options. 117 ---------------------------------------------------- 118 ## Total Size = 0x00000d70 = 3440 Bytes 119 ## Start Addr = 0x00001000 120 121 BOOT> go 0x10D8 122 123 ## Starting application at 0x000010D8 ... 124 125 SMC91111> 126 127 3. Setting MAC addresses 128 -------------------------------------------------------------------------- 129 130 The MAC address can be stored in four locations: 131 132 -Boot environmental variable in Flash <- can not change, without 133 re-flashing U-Boot. 134 U-Boot environmental variable <- can not change, without 135 resetting board/U-Boot 136 LAN91C111 Registers <- volatile 137 LAN91C111 EEPROM <- Non-volatile 138 139 If you have not activated the network, and do not have a hardcoded 140 or pre-assigned MAC address in U-Boot, the environmental variables 141 should be blank, and allow you to set things one time. 142 143 To set the EEPROM MAC address to 12:34:56:78:9A:BC 144 145 SMC91111> W E 20 3412 146 147 Writing EEPROM register 20 with 3412 148 SMC91111> W E 21 7856 149 150 Writing EEPROM register 21 with 7856 151 SMC91111> W E 22 BC9A 152 153 Writing EEPROM register 22 with bc9a 154 EEPROM contents copied to MAC 155 SMC91111> P 156 157 Current MAC Address in SMSC91111 12:34:56:78:9a:bc 158 Current MAC Address in EEPROM 12:34:56:78:9a:bc 159 160 (CNTRL-C to exit) 161 SMC91111> ## Application terminated, rc = 0x0 162 163 BOOT> reset 164 U-Boot 1.1.1 (gcc version: 3.3.3) 165 Release Version Beta released on Oct 10 2004 - 00:34:35 166 Blackfin support by LG Soft India 167 For further information please check this link http://www.blackfin.uclinux.org 168 BOOT> ping 192.168.0.4 169 170 Using MAC Address 12:34:56:78:9A:BC 171 host 192.168.0.4 is alive 172 173 174 4. Other things that you can do 175 -------------------------------------------------------------------------- 176 After the stand alone application is running, there are a few options: 177 - P : Print the MAC 178 - D : Dump the LAN91C111 EEPROM contents 179 - M : Dump the LAN91C111 MAC contents 180 - C : Copies the MAC address from the EEPROM to the LAN91C111 181 - W : Write a register in the EEPROM or in the MAC 182 183 SMC91111> P 184 185 Current MAC Address in SMSC91111 12:34:56:78:9a:bc 186 Current MAC Address in EEPROM 12:34:56:78:9a:bc 187 188 SMC91111> D 189 190 IOS2-0 000 001 002 003 004 005 006 007 191 CONFIG 00:ffff 04:ffff 08:ffff 0c:ffff 10:ffff 14:ffff 18:ffff 1c:ffff 192 BASE 01:ffff 05:ffff 09:ffff 0d:ffff 11:ffff 15:ffff 19:ffff 1d:ffff 193 02:ffff 06:ffff 0a:ffff 0e:0020 12:ffff 16:ffff 1a:ffff 1e:ffff 194 03:ffff 07:ffff 0b:ffff 0f:ffff 13:ffff 17:ffff 1b:ffff 1f:ffff 195 196 20:3412 21:7856 22:bc9a 23:ffff 24:ffff 25:ffff 26:ffff 27:ffff 197 28:ffff 29:ffff 2a:ffff 2b:ffff 2c:ffff 2d:ffff 2e:ffff 2f:ffff 198 30:ffff 31:ffff 32:ffff 33:ffff 34:ffff 35:ffff 36:ffff 37:ffff 199 38:ffff 39:ffff 3a:ffff 3b:ffff 3c:ffff 3d:ffff 3e:ffff 3f:ffff 200 201 SMC91111> M 202 203 Bank0 Bank1 Bank2 Bank3 204 00 0000 a0b1 3332 0000 205 02 0000 1801 8000 0000 206 04 0000 3412 8080 0000 207 06 0000 7856 003f 0000 208 08 0404 bc9a 02df 3332 209 0a 0000 ffff 02df 3391 210 0c 0000 1214 0004 001f 211 0e 3300 3301 3302 3303 212 213 SMC91111> C 214 215 EEPROM contents copied to MAC 216 217 SMC91111> W E 2A ABCD 218 219 Writing EEPROM register 2a with abcd 220 221 SMC91111> W M 14 FF00 222 223 Writing MAC register bank 1, reg 04 with ff00 224
