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support detection of eeprom shadows we now know are

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software write-protect registers.
      prevent Vaio detection from running more than once.
      update eeprom driver documentation.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2448 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark D. Studebaker
2004-04-18 00:38:28 +00:00
parent ef2e3e0b1d
commit 49754b948f
3 changed files with 59 additions and 18 deletions
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50
prog/detect/sensors-detect
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@@ -1245,6 +1245,12 @@ use subs qw(mtp008_detect lm78_detect lm78_isa_detect lm78_alias_detect
i2c_addrs => [0x57],
i2c_detect => sub { eeprom_detect 1, @_ },
},
{
name => "SPD EEPROM with Software Write-Protect",
driver => "eeprom",
i2c_addrs => [0x50..0x57],
i2c_detect => sub { eeprom_detect 2, @_ },
},
{
name => "LTC1710",
driver => "ltc1710",
@@ -3672,7 +3678,8 @@ sub ite_alias_detect
return 1;
}
# $_[0]: Chip to detect (0 = SPD EEPROM, 1 = Sony Vaio EEPROM)
# $_[0]: Chip to detect (0 = SPD EEPROM, 1 = Sony Vaio EEPROM
# 2 = SPD EEPROM with Software Write Protect)
# $_[1]: A reference to the file descriptor to access this chip
# $_[2]: Address
# Returns: 8 for a memory eeprom, 4 to 9 for a Sony Vaio eeprom,
@@ -3687,17 +3694,37 @@ sub ite_alias_detect
sub eeprom_detect
{
my ($chip,$file,$addr) = @_;
my $checksum = 0;
# 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,$i);
if ($chip != 1) {
for (my $i = 0; $i <= 62; $i ++) {
$checksum += i2c_smbus_read_byte_data($file,$i);
}
$checksum &= 255;
$checksum -= i2c_smbus_read_byte_data($file,63);
}
if ($chip == 0) {
if($checksum == 0) {
return 8;
} else {
return 1;
}
}
if ($chip == 2) {
# check for 'shadow' write-protect register at 0x30-37
i2c_set_slave_addr($file,$addr - 0x20);
if(i2c_smbus_write_quick($file,$SMBUS_WRITE) >= 0 &&
i2c_smbus_read_byte_data($file,0x80) == -1) {
if($checksum == 0) {
return (9, $addr - 0x20);
} else {
return (2, $addr - 0x20);
}
}
}
$checksum &= 255;
return 8
if $chip == 0 and i2c_smbus_read_byte_data($file,63) == $checksum;
# Look for a Sony Vaio EEPROM
# Look for a Sony Vaio EEPROM ($chip == 1)
my $vaioconf = 1;
$vaioconf += 4
if i2c_smbus_read_byte_data($file,0x80) == 0x50
@@ -3718,14 +3745,9 @@ sub eeprom_detect
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;
return;
}
# $_[0]: A reference to the file descriptor to access this chip.