Dear Rudolf
> I'm sorry I'm out of ideas right now. Maybe you can modify program
> eeprom.c in lmsensors package (the prog/ directory) and try to read
> firts 16 bytes of EEPROM again and again if you get same results.
> Or first four bytes, I think first two should not be zeros.
My debug environment is linux-2.6.10, so the eeprom.c you mentioned
should not be in lm-sensors package, but in:
/usr/src/linux-2.6.10/drivers/i2c/chips/eeprom.c
Am I right? Btw, all the dump and debug messages are from linux-2.6
instead of linux-2.4.
I do NOT modify the eeprom.c, instead, I do the dumps below, please
refer to it.
> Please can you obtain several dumps from the bus?
>
> like:
> #!/bin/bash
> while true ; do
> i2cdump -y 0 0x50 >>eeprom
> i2cdump -y 0 0x50 >>eeprom
> i2cdump -y 0 0x2f >>winbon <=your chip adr I think is this one
> i2cdump -y 0 0x2f >>winbon <=your chip adr I think is this one
> done
> (ctrl c to stop after several thousends cycles please)
I use such script you gave me to dump it, the attachment is the dump
output in hundreds of times. Please check it.
#!/bin/bash
while true ; do
i2cdump -y 0 0x50
i2cdump -y 0 0x50
i2cdump -y 0 0x2f
i2cdump -y 0 0x2f
done
I have some questions here,
(1) why the script should contains two lines of " i2cdump -y 0 0x2f"?
(2) Should I modify the second "i2cdump -y 0 0x50" into " i2cdump -y 0
0x51"?
Because on Abit motherboard:
[root@ ~]# sensors
eeprom-i2c-0-51
Adapter: SMBus ALi 1563 Adapter @ 5000
Unknown EEPROM type (255).
eeprom-i2c-0-50
Adapter: SMBus ALi 1563 Adapter @ 5000
Unknown EEPROM type (255).
> Also I would like to see correct i2cdump of SAME memory module.
> Maybe we can guess something from different values. So you need to
> put the module to some other motherboard and perform i2cdump on it.
I dump it again on the platform where can work correctly:
RIOWORKS PDPLA0250000005
Intel Corp.82801CA/CAM SMBus Controller
Intel(R) XEON(TM) CPU 2.00GHz
Please check it, the dump output mesasge on this platform is:
[root@ ~]# i2cdump 0 0x50
No size specified (using byte-data access)
WARNING! This program can confuse your I2C bus, cause data loss and
worse!
I will probe file /dev/i2c-0, address 0x50, mode byte
Continue? [Y/n]
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: ac 00 07 0c 0a 01 48 00 04 75 75 02 80 08 08 01 ?.????H.?uu?????
10: 0e 04 0c 01 02 26 00 a0 75 00 00 50 3c 50 30 20 ?????&.?u..P<P0
20: 00 00 50 50 00 00 00 00 00 41 4b 30 32 75 00 00 ..PP.....AK02u..
30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1a ...............?
40: ac 00 00 00 00 00 00 bb ff 00 00 00 00 00 00 00 ?......?........
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
80: ac 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ?...............
90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
a0: 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
c0: ac 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ?...............
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: 00 00 ac ff ff ff ff ff ff ff ff ff ff ff ff ff ..?.............
f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
[root@ ~]# sensors
eeprom-i2c-0-54
Adapter: SMBus I801 adapter at 1100
Memory type: DDR SDRAM DIMM
Memory size (MB): 128
eeprom-i2c-0-50
Adapter: SMBus I801 adapter at 1100
Memory type: DDR SDRAM DIMM
Memory size (MB): 128
Thanks
Best Regards
Chunhao
2005-3-31
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