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Add detection of the National Semiconductor (now Texas Instruments)

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LM96080. It is functionally compatible with the LM80 but detection is
completely different.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@6018 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare
2012-01-31 12:55:39 +00:00
parent ae32c8a919
commit a79b62b21c
2 changed files with 50 additions and 33 deletions
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82
prog/detect/sensors-detect
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@@ -540,7 +540,12 @@ use vars qw(@i2c_adapter_names);
name => "National Semiconductor LM80",
driver => "lm80",
i2c_addrs => [0x28..0x2f],
i2c_detect => sub { lm80_detect(@_); },
i2c_detect => sub { lm80_detect(@_, 0); },
}, {
name => "National Semiconductor LM96080",
driver => "lm80",
i2c_addrs => [0x28..0x2f],
i2c_detect => sub { lm80_detect(@_, 1); },
}, {
name => "National Semiconductor LM85",
driver => "lm85",
@@ -4259,11 +4264,15 @@ sub ds1621_detect
return ($slope == 0x10 && $counter <= $slope) ? 3 : 2;
}
# Chip to detect: 0 = LM80, 1 = LM96080
# Registers used:
# 0x00: Configuration register
# 0x02: Interrupt state register
# 0x2a-0x3d: Limits registers
# This one is easily misdetected since it doesn't provide identification
# 0x07: Converstion rate register (LM96080 only)
# 0x2a-0x3d: Limits registers (LM80 only)
# 0x3e: Manufacturer's ID register (LM96080 only)
# 0x3f: Steppind/die revision ID register (LM96080 only)
# The LM80 is easily misdetected since it doesn't provide identification
# registers. So we have to use some tricks:
# - 6-bit addressing, so limits readings modulo 0x40 should be unchanged
# - positive temperature limits
@@ -4276,44 +4285,51 @@ sub ds1621_detect
# to loose comparisons did not change the score.
sub lm80_detect
{
my ($file, $addr) = @_;
my ($file, $addr, $chip) = @_;
my ($i, $reg);
return if (i2c_smbus_read_byte_data($file, 0x00) & 0x80) != 0;
return if (i2c_smbus_read_byte_data($file, 0x02) & 0xc0) != 0;
for ($i = 0x2a; $i <= 0x3d; $i++) {
$reg = i2c_smbus_read_byte_data($file, $i);
return if i2c_smbus_read_byte_data($file, $i+0x40) != $reg;
return if i2c_smbus_read_byte_data($file, $i+0x80) != $reg;
return if i2c_smbus_read_byte_data($file, $i+0xc0) != $reg;
}
if ($chip == 0) {
for ($i = 0x2a; $i <= 0x3d; $i++) {
$reg = i2c_smbus_read_byte_data($file, $i);
return if i2c_smbus_read_byte_data($file, $i+0x40) != $reg;
return if i2c_smbus_read_byte_data($file, $i+0x80) != $reg;
return if i2c_smbus_read_byte_data($file, $i+0xc0) != $reg;
}
# Refine a bit by checking whether limits are in the correct order
# (min<max for voltages, hyst<max for temperature). Since it is still
# possible that the chip is an LM80 with limits not properly set,
# a few "errors" are tolerated.
my $confidence = 0;
for ($i = 0x2a; $i <= 0x3a; $i++) {
# Refine a bit by checking whether limits are in the correct order
# (min<max for voltages, hyst<max for temperature). Since it is still
# possible that the chip is an LM80 with limits not properly set,
# a few "errors" are tolerated.
my $confidence = 0;
for ($i = 0x2a; $i <= 0x3a; $i++) {
$confidence++
if i2c_smbus_read_byte_data($file, $i) < i2c_smbus_read_byte_data($file, $i+1);
}
# hot temp<OS temp
$confidence++
if i2c_smbus_read_byte_data($file, $i) < i2c_smbus_read_byte_data($file, $i+1);
if i2c_smbus_read_byte_data($file, 0x38) < i2c_smbus_read_byte_data($file, 0x3a);
# Negative temperature limits are unlikely.
for ($i = 0x3a; $i <= 0x3d; $i++) {
$confidence++ if (i2c_smbus_read_byte_data($file, $i) & 0x80) == 0;
}
# $confidence is between 0 and 14
$confidence = ($confidence >> 1) - 4;
# $confidence is now between -4 and 3
return unless $confidence > 0;
return $confidence;
} elsif ($chip == 1) {
return if (i2c_smbus_read_byte_data($file, 0x07) & 0xfe) != 0;
return if i2c_smbus_read_byte_data($file, 0x3e) != 0x01;
return if i2c_smbus_read_byte_data($file, 0x3f) != 0x08;
return 6;
}
# hot temp<OS temp
$confidence++
if i2c_smbus_read_byte_data($file, 0x38) < i2c_smbus_read_byte_data($file, 0x3a);
# Negative temperature limits are unlikely.
for ($i = 0x3a; $i <= 0x3d; $i++) {
$confidence++ if (i2c_smbus_read_byte_data($file, $i) & 0x80) == 0;
}
# $confidence is between 0 and 14
$confidence = ($confidence >> 1) - 4;
# $confidence is now between -4 and 3
return unless $confidence > 0;
return $confidence;
}
# Registers used: