Add detection of SMSC EMC1403 and EMC1404.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5833 7894878c-1315-0410-8ee3-d5d059ff63e0

CHANGES

@@ -5,6 +5,7 @@ SVN HEAD
   libsensors: Increase MAX_SENSORS_PER_TYPE to 24
   sensors-detect: Give udev time to settle before accessing i2c nodes
                   Add support for Intel PCH (SMBus)
+                  Add support for SMSC EMC1403 and EMC1404
 
 3.1.2 (2010-02-02)
   libsensors: Support upcoming sysfs path to i2c adapters

prog/detect/sensors-detect

@@ -1164,6 +1164,16 @@ use vars qw(@i2c_adapter_names);
 		driver => "to-be-written",
 		i2c_addrs => [0x2f],
 		i2c_detect => sub { fintek_detect(@_, 7); },
+	}, {
+		name => "SMSC EMC1403",
+		driver => "emc1403",
+		i2c_addrs => [0x18, 0x2a, 0x4c, 0x4d],
+		i2c_detect => sub { emc1403_detect(@_, 0); },
+	}, {
+		name => "SMSC EMC1404",
+		driver => "to-be-written", # emc1403
+		i2c_addrs => [0x18, 0x2a, 0x4c, 0x4d],
+		i2c_detect => sub { emc1403_detect(@_, 1); },
 	}, {
 		name => "Smart Battery",
 		driver => "sbs", # ACPI driver, not sure if it always works
@@ -5133,6 +5143,31 @@ sub fintek_detect
 	return 7;
 }
 
+# Chip to detect: 0 = EMC1403, 1 = EMC1404
+# Registers used:
+#   0xfd: Device ID register
+#   0xfe: Vendor ID register
+#   0xff: Revision register
+sub emc1403_detect
+{
+	my ($file, $addr, $chip) = @_;
+	my $dev_id = i2c_smbus_read_byte_data($file, 0xfd);
+	my $man_id = i2c_smbus_read_byte_data($file, 0xfe);
+	my $rev = i2c_smbus_read_byte_data($file, 0xff);
+
+	return unless $man_id == 0x5d;	# SMSC
+
+	if ($chip == 0) {
+		return unless $dev_id == 0x21;
+		return unless $rev == 0x01;
+	} elsif ($chip == 1) {
+		return unless $dev_id == 0x25;
+		return unless $rev == 0x01;
+	}
+
+	return 6;
+}
+
 # This checks for non-FFFF values for temperature, voltage, and current.
 # The address (0x0b) is specified by the SMBus standard so it's likely
 # that this really is a smart battery.