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(Phil) Getting closer to better EEPROM detection. Checksum test now

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works for EEPROMs on PC-100 DIMMs.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@278 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Philip Edelbrock
1999-02-28 17:24:41 +00:00
parent 69c584d5ae
commit 142256a075
2 changed files with 26 additions and 4 deletions
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15
prog/detect/sensors-detect
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@@ -214,7 +214,7 @@ use subs qw(lm78_detect lm78_isa_detect lm78_alias_detect lm75_detect
name => "Serial EEPROM",
driver => "eeprom",
i2c_addrs => [0x50..0x57],
i2c_detect => sub { eeprom_detect 0, @_ },
i2c_detect => sub { eeprom_detect @_ },
}
);
@@ -1290,12 +1290,23 @@ sub sis5595_isa_detect
# $_[1]: Address
# Returns: undef if not detected, (5) if detected.
# Registers used:
# 0x??: PC-100 Checksum
# 0x00-0x63: PC-100 Data and Checksum
sub eeprom_detect
{
my ($file,$addr) = @_;
# Check the checksum for validity (only works for PC-100 DIMMs)
my $checksum = 0;
for (my $i = 0; $i <= 62; $i = $i + 1) {
$checksum = $checksum + i2c_smbus_read_byte_data($file,$i);
}
$checksum=$checksum & 255;
if (i2c_smbus_read_byte_data($file,63) == $checksum) {
return (8);
}
# Even if checksum test fails, it still may be an eeprom
return (1);
}
################
# MAIN PROGRAM #
################