From 05018a96132b3cbcfd9fc631e575f13046bfc0f6 Mon Sep 17 00:00:00 2001
From: "Mark D. Studebaker" <mdsxyz123@yahoo.com>
Date: Sun, 13 Feb 2005 16:56:42 +0000
Subject: [PATCH] add special driver name "use-isa-instead",       add vt1211
 alias detection

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2904 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 prog/detect/sensors-detect | 45 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 44 insertions(+), 1 deletion(-)

diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index a3b2a6cd..765dba12 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -885,7 +885,7 @@ use subs qw(mtp008_detect lm78_detect lm78_isa_detect lm78_alias_detect
             m5879_detect pca9540_detect smartbatt_mgr_detect
             smartbatt_chgr_detect adt7467_detect lm92_detect max1619_detect
             lm93_detect lm77_detect lm63_detect pca9556_detect
-            w83791sd_detect);
+            w83791sd_detect vt1211_i2c_detect vt1211_alias_detect);
 
 # This is a list of all recognized chips. 
 # Each entry must have the following fields:
@@ -894,6 +894,7 @@ use subs qw(mtp008_detect lm78_detect lm78_isa_detect lm78_alias_detect
 #      "to-be-written" if it is not yet available. Put in exactly
 #      "not-a-sensor" if it is not a hardware monitoring chip and
 #      there is no known driver for it.
+#      Put in exactly "use-isa-instead" if no i2c driver will be written.
 #  i2c_addrs (optional): For I2C chips, the range of valid I2C addresses to
 #      probe. Recommend avoiding 0x69 because of clock chips.
 #  i2c_driver_addrs (optional): For I2C chips, the range of valid I2C
@@ -1384,6 +1385,12 @@ use subs qw(mtp008_detect lm78_detect lm78_isa_detect lm78_alias_detect
        isa_addrs => [ 0 ],
        isa_detect => sub { via8231_isa_detect @_ },
      },
+     {
+       name => "VIA VT1211 (I2C)",
+       driver => "use-isa-instead",
+       i2c_addrs => [0x2d],
+       i2c_detect => sub { vt1211_i2c_detect 0, @_ },
+     },
      {
        name => "ITE IT8712F",
        driver => "it87",
@@ -1732,6 +1739,7 @@ use subs qw(mtp008_detect lm78_detect lm78_isa_detect lm78_alias_detect
 	driver => "vt1211",
 	devid => 0x3c,
 	logdev => 0x0b,
+	alias_detect => sub { vt1211_alias_detect 0, @_ },
       },
       {
 	name => "Winbond W83627HF Super IO Sensors",
@@ -4638,6 +4646,39 @@ sub max6650_detect
   return 4;
 }
 
+# $_[0]: Chip to detect (0 = VT1211)
+# $_[1]: A reference to the file descriptor to access this chip.
+#        We may assume an i2c_set_slave_addr was already done.
+# $_[2]: Address
+#
+# This isn't very good detection.
+# Verify the i2c address, and the stepping ID (which is 0xb0 on
+# my chip but could be different for others...
+#
+sub vt1211_i2c_detect
+{
+  my ($chip,$file,$addr) = @_;
+  return 0 unless (i2c_smbus_read_byte_data($file,0x48) & 0x7f) == $addr;
+  return 0 unless i2c_smbus_read_byte_data($file,0x3f) == 0xb0;
+  return 2;
+}
+
+# $_[0]: Chip to detect (0 = VT1211)
+# $_[1]: ISA address
+# $_[2]: I2C file handle
+# $_[3]: I2C address
+sub vt1211_alias_detect
+{
+  my ($chip,$isa_addr,$file,$i2c_addr) = @_;
+  my $i;
+  return 0 unless (inb($isa_addr + 0x48) & 0x7f) == $i2c_addr;
+  return 0 unless (i2c_smbus_read_byte_data($file,0x48) & 0x7f) == $i2c_addr;
+  for ($i = 0x2b; $i <= 0x3d; $i ++) {
+    return 0 unless inb($isa_addr + $i) == i2c_smbus_read_byte_data($file,$i);
+  }
+  return 1;
+}
+
 
 ################
 # MAIN PROGRAM #
@@ -4766,6 +4807,8 @@ sub generate_modprobes
     next if not @{$chip->{detected}};
     if ($chip->{driver} eq "to-be-written") {
       $modprobes .= "# no driver for $chip->{detected}[0]{chipname} yet\n";
+    } elsif ($chip->{driver} eq "use-isa-instead") {
+      $modprobes .= "# no I2C driver for $chip->{detected}[0]{chipname} use ISA driver instead\n";
     } elsif ($chip->{driver} ne "not-a-sensor") {
       $modprobes .= "modprobe $chip->{driver}\n";
     }