Hello,
I’m trying to get some sense out of this:
00:1f.3 SMBus: Intel Corporation C600/X79 series chipset SMBus Host Controller (rev 05)
Subsystem: Super Micro Computer Inc Device 0661
Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin C routed to IRQ 18
Region 0: Memory at fba20000 (64-bit, non-prefetchable) [size=256]
Region 4: I/O ports at 1180 [size=32]
Kernel driver in use: i801_smbus
Kernel modules: i2c-i801
$ sudo i2cdetect -l
i2c-0 smbus SMBus I801 adapter at 1180 SMBus adapter
i2c-1 i2c igb BB I2C adapter
i2c-2 i2c igb BB I2C adapter
The following doesn’t make sense to me:
$ sudo i2cdetect 0
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-0.
I will probe address range 0x03-0x77.
Continue? [Y/n] Y
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- 08 -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- 2d -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- 44 -- -- -- 48 -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- 68 69 -- -- 6c -- -- --
70: -- -- -- -- -- -- -- --
Since I have two RDIMMs on this board:
$ sudo ./ipmicfg-linux.x86_64 -nm cpumemtemp
CPU#0 = 35(c)
[CPU#0]CHANNEL#2, DIMM#0(P1_DIMMC1) = 24(c)
[CPU#0]CHANNEL#2, DIMM#1(P1_DIMMC2) = 24(c)
And snooping the bus on boot up with a total phase Aardvark, I see that the DIMMs are on addr 0x50, and 0x51, and if I dump 0x50, I just see 256 bytes of 0xff, rather than the SPD eeprom data that I was expecting.
I’ve been hacking away at the kernel module, but I’ve not been able to really make any progress. Looking for any pointers.
thanks,
A.
--
Alun Evans
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