projects / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| ba56f625 WD |
1 | XES XPedite1000 Board |
| 2 | ||
| 3 | Last Update: December 29, 2003 | |
| 4 | ======================================================================= | |
| 5 | ||
| 6 | This file contains some handy info regarding U-Boot and the XES | |
| 7 | XPedite1000 PPC440GX PrPMC board. See the README.ppc440 for additional | |
| 8 | information. | |
| 9 | ||
| 10 | ||
| 11 | SWITCH SETTINGS & JUMPERS | |
| 12 | ========================== | |
| 13 | ||
| 14 | Jumpers selected for AMD29LV040B flash part as the boot flash. | |
| 15 | ||
| 16 | ||
| 17 | I2C Strap EEPROM & Environment Settings | |
| 18 | ======================================= | |
| 19 | ||
| 20 | The XPedite1000 uses a single I2C eeprom for the 440 strappings and for | |
| 21 | the environment variables. The first page (256 bytes) contains the | |
| 22 | strappings and the 2 EMAC HW Ethernet addresses. Be careful not to | |
| 23 | change the 1st page of the EEPROM! Unpopulated jumper J560 can get you | |
| 24 | out of trouble as it disables the strapping read from EEPROM. | |
| 25 | ||
| 26 | I2C iprobe | |
| 27 | ===================== | |
| 28 | ||
| 29 | The i2c utilities work and have been tested on Rev B. of the 440GX. See | |
| 30 | README.ebony for more information about i2c probing with the 440. | |
| 31 | ||
| 32 | ||
| 33 | GETTING OUT OF I2C TROUBLE | |
| 34 | =========================== | |
| 35 | ||
| 36 | (Direct quote from README.ebony) | |
| 37 | If you're like me ... you may have screwed up your bootstrap serial | |
| 38 | eeprom ... or worse, your SPD eeprom when experimenting with the | |
| 39 | i2c commands. If so, here are some ideas on how to get out of | |
| 40 | trouble: | |
| 41 | ||
| 42 | Serial bootstrap eeprom corruption: | |
| 43 | ----------------------------------- | |
| 44 | Power down the board and set the following straps: | |
| 45 | ||
| 46 | J560 - closed | |
| 47 | ||
| 48 | This will select the default sys0 and sys1 settings (the serial | |
| 49 | eeproms are not used). Then power up the board and fix the serial | |
| 50 | eeprom using the imm command. Here are the values I currently | |
| 51 | use: | |
| 52 | ||
| 53 | => imd 50 0 10 | |
| 54 | ||
| 55 | 0000: 85 7d 42 06 07 80 11 00 00 00 00 00 00 00 00 00 .}B............. | |
| 56 | ||
| 57 | Once you have the eeproms set correctly change the | |
| 58 | J560 straps as you desire. | |
| 59 | ||
| 60 | ||
| 61 | PPC440GX Ethernet EMACs | |
| 62 | ======================= | |
| 63 | ||
| 64 | The XES XPedite1000 uses emac 2 & 3 and ignores emac 0 & 1. PHYs are connected | |
| 65 | only to emac 2 & 3. The HW Ethernet addresses are read from the i2c eeprom and | |
| 66 | placed in the bd info structure for enet2addr and enet3addr. The ethernet driver | |
| 67 | senses that enetaddr and enet1addr are 0's and does not use them. | |
| 68 | ||
| 69 | As of this writing gigabit ethernet and the TCPIP acceleration hardware is not | |
| 70 | supported. | |
| 71 | ||
| 72 | ||
| 73 | Flash Support | |
| 74 | ============= | |
| 75 | ||
| 76 | As of this writing, there is support for the 1/2mb boot flash only. User flash | |
| 77 | is not yet supported. | |
| 78 | ||
| 79 | ||
| 80 | Regards, | |
| 81 | --Travis | |
| 82 | <[email protected]> |