eeprom driver

Jean Delvare delvare at ensicaen.ismra.fr
Mon Feb 4 18:31:46 CET 2002


> The print_eeprom() code in prog/sensors/chips.c will only
> print out the SDRAM information if the chip is
> coded as an SDRAM, that is, location 0x02 contains 0x04.

Which is the case for 0x50 but not for 0x57 (in my case) so it works as
expected.

> If you send the output of either i2cdump or cat
> /proc/sys/dev/sensors/*eeprom*/*
> we can look at it.

root at arrakis:~# cat `ls -v /proc/sys/dev/sensors/eeprom-i2c-0-50/*`
128 8 4 12 9 2 64 0 1 117 84 0 128 16 0 1
15 4 6 1 1 0 14 160 96 255 255 20 15 20 45 16
21 8 21 8 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 18 11
193 73 78 70 73 78 69 79 69 72 89 83 54 52 86 49
54 50 50 48 71 68 76 45 55 46 53 3 201 1 56 3
59 173 177 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 100 199
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255

root at arrakis:~# cat `ls -v /proc/sys/dev/sensors/eeprom-i2c-0-57/*`
0 0 0 0 0 0 0 255 255 255 255 255 255 255 255 255
17 67 101 64 75 102 17 198 130 218 8 0 70 67 209 98
69 85 48 54 48 51 0 0 0 0 0 0 0 0 0 0
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255
80 67 71 45 71 82 50 49 52 69 80 40 70 82 41 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
48 49 0 0 0 0 0 0 0 0 56 56 52 77 27 81
80 80 134 0 0 0 0 0 0 0 0 0 1 5 117 0
50 56 51 51 51 51 53 52 45 53 52 54 49 52 49 48
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
49 49 47 49 53 47 48 49 32 49 51 58 50 54 58 51
55 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

(Note that I modified the eeprom driver to show 256 bytes instead of 128.)

The same with i2cdump, in case you prefer.

root at arrakis:/usr/src/lm_sensors-CVS/prog/dump# ./i2cdump 0 0x50
Warning: 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
  You have five seconds to reconsider and press CTRL-C!

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00: 80 08 04 0c 09 02 40 00 01 75 54 00 80 10 00 01
10: 0f 04 06 01 01 00 0e a0 60 ff ff 14 0f 14 2d 10
20: 15 08 15 08 ff ff ff ff ff ff ff ff ff ff ff ff
30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff 12 0b
40: c1 49 4e 46 49 4e 45 4f 45 48 59 53 36 34 56 31
50: 36 32 32 30 47 44 4c 2d 37 2e 35 03 c9 01 38 03
60: 3b ad b1 ff ff ff ff ff ff ff ff ff ff ff ff ff
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff 64 c7
80: ff ff 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: ff ff 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: ff ff 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: ff ff ff 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 at arrakis:/usr/src/lm_sensors-CVS/prog/dump# ./i2cdump 0 0x57
Warning: 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 0x57, mode byte
  You have five seconds to reconsider and press CTRL-C!

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00: 00 00 00 00 00 00 00 ff ff ff ff ff ff ff ff ff
10: 11 43 65 40 4b 66 11 c6 82 da 08 00 46 43 d1 62
20: 45 55 30 36 30 33 00 00 00 00 00 00 00 00 00 00
30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
80: 50 43 47 2d 47 52 32 31 34 45 50 28 46 52 29 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 30 31 00 00 00 00 00 00 00 00 38 38 34 4d 1b 51
b0: 50 50 86 00 00 00 00 00 00 00 00 00 01 05 75 00
c0: 32 38 33 33 33 33 35 34 2d 35 34 36 31 34 31 30
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 31 31 2f 31 35 2f 30 31 20 31 33 3a 32 36 3a 33
f0: 37 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

I remind you that 0x50 is the first SO-DIMM slot, working as expected. The
two questions that remain unsolved are :
1* Why is the second slot not available ?
2* What is showing at 0x57 ?

-- 
       /~~       Jean "Khali" Delvare
  -----\_                        mail: delvare at ensicaen.ismra.fr
 --------\                http://www.ensicaen.ismra.fr/~delvare/
---=ISMRA/- ____________________________________________________



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