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Fix EEPROM detection (again).

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1943 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare
2003-08-07 08:51:08 +00:00
parent 283e61378a
commit ded9daf517
1 changed files with 51 additions and 28 deletions
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79
prog/detect/sensors-detect
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@@ -1153,10 +1153,16 @@ use subs qw(mtp008_detect lm78_detect lm78_isa_detect lm78_alias_detect
isa_detect => sub { ite_isa_detect 0, @_ },
} ,
{
name => "Serial EEPROM",
name => "SPD EEPROM",
driver => "eeprom",
i2c_addrs => [0x50..0x57],
i2c_detect => sub { eeprom_detect @_ },
i2c_detect => sub { eeprom_detect 0, @_ },
},
{
name => "Sony Vaio EEPROM",
driver => "eeprom",
i2c_addrs => [0x57],
i2c_detect => sub { eeprom_detect 1, @_ },
},
{
name => "LTC1710",
@@ -3057,42 +3063,59 @@ sub ite_alias_detect
return 1;
}
# $_[0]: A reference to the file descriptor to access this chip.
# We may assume an i2c_set_slave_addr was already done.
# $_[1]: Address
# Returns: 8 for a memory eeprom, 6 or 8 for a Sony Vaio eeprom,
# 1 or 2 for an unknown eeprom
# $_[0]: Chip to detect (0 = SPD EEPROM, 1 = Sony Vaio EEPROM)
# $_[1]: A reference to the file descriptor to access this chip
# $_[2]: Address
# Returns: 8 for a memory eeprom, 4 to 9 for a Sony Vaio eeprom,
# 1 for an unknown eeprom
# Registers used:
# 0-63: PC-100 Data and Checksum
# 2-5, 128-131: Sony Vaio Data
# 0-63: SPD Data and Checksum
# 0x80-0x83: Sony Vaio Data ("PCG-")
# 0xe2, 0xe5, 0xe8, 0xeb, Oxee: Sony Vaio Timestamp constant bytes.
# 0x1a-0x1c: Sony Vaio MAC address
# This detection function is a bit tricky; this is to workaround
# wrong misdetection messages that would else arise.
sub eeprom_detect
{
my ($file,$addr) = @_;
# Check the checksum for validity (only works for PC-100 DIMMs)
my ($chip,$file,$addr) = @_;
# Check the checksum for validity (works for most DIMMs and RIMMs)
my $checksum = 0;
for (my $i = 0; $i <= 62; $i ++) {
$checksum += i2c_smbus_read_byte_data($file,$i);
}
$checksum &= 255;
return 8
if (i2c_smbus_read_byte_data($file,63) == $checksum);
# Even if checksum test fails, it still may be an eeprom
if (i2c_smbus_read_byte_data($file,2) == 0
&& i2c_smbus_read_byte_data($file,3) == 0
&& i2c_smbus_read_byte_data($file,4) == 0
&& i2c_smbus_read_byte_data($file,5) == 0)
{
if (i2c_smbus_read_byte_data($file,128) == ord 'P'
&& i2c_smbus_read_byte_data($file,129) == ord 'C'
&& i2c_smbus_read_byte_data($file,130) == ord 'G'
&& i2c_smbus_read_byte_data($file,131) == ord '-')
{
# Sony Vaio
return 8 if ($addr == 0x57);
return 6;
}
return 2;
if $chip == 0 and i2c_smbus_read_byte_data($file,63) == $checksum;
# Look for a Sony Vaio EEPROM
my $vaioconf = 1;
$vaioconf += 4
if i2c_smbus_read_byte_data($file,0x80) == 0x50
&& i2c_smbus_read_byte_data($file,0x81) == 0x43
&& i2c_smbus_read_byte_data($file,0x82) == 0x47
&& i2c_smbus_read_byte_data($file,0x83) == 0x2d;
$vaioconf += 5
if i2c_smbus_read_byte_data($file,0xe2) == 0x2f
&& i2c_smbus_read_byte_data($file,0xe5) == 0x2f
&& i2c_smbus_read_byte_data($file,0xe8) == 0x20
&& i2c_smbus_read_byte_data($file,0xeb) == 0x3a
&& i2c_smbus_read_byte_data($file,0xee) == 0x3a;
$vaioconf += 3
if i2c_smbus_read_byte_data($file,0x1a) == 0x08
&& i2c_smbus_read_byte_data($file,0x1b) == 0x00
&& i2c_smbus_read_byte_data($file,0x1c) == 0x46;
$vaioconf = 9
if $vaioconf > 9;
if ($vaioconf > 1) {
return if $chip != 1;
return $vaioconf;
}
# Even if all tests fail, it still may be an eeprom
return if $chip != 0;
# Default to SPD EEPROM
return 1;
}