From 0aedf2d5d1ff7712026f5e41d2d6713d002033d4 Mon Sep 17 00:00:00 2001
From: Frodo Looijaard <frodol@dds.nl>
Date: Tue, 1 Feb 2000 21:12:43 +0000
Subject: [PATCH] sensors-detect should cope better now with adapters with
 multiple         busses

The changes are large and tricky, so it is almost certain there are
many bugs. Please run sensors-detect and tell me whether it works
correctly or not.

All changes are in the routines that print the modprobe statements at
the end, so if it fails, it will fail there.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@720 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 prog/detect/sensors-detect | 77 +++++++++++++++++++++++++-------------
 1 file changed, 50 insertions(+), 27 deletions(-)

diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index 2232e786..ca61d4fa 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -1782,11 +1782,21 @@ sub print_chips_report
 }
 
 # $_[0]: 1 if ISA bus is prefered, 0 for SMBus
+# We build here an array adapters, indexed on the number the adapter has
+# at this moment (we assume only loaded adapters are interesting at all;
+# everything that got scanned also got loaded). Each entry is a reference
+# to a hash containing:
+#  driver: Name of the adapter driver
+#  nr_now: Number of the bus now
+#  nr_later: Number of the bus when the modprobes are done (not included if the
+#        driver should not be loaded)
+# A second array, called 
 sub generate_modprobes
 {
   my ($prefer_isa) = @_;
 
-  my ($chip,$detection,%adapters,$nr,$i,@optionlist,@probelist);
+  my ($chip,$detection,$nr,$i,@optionlist,@probelist,$driver,$isa,$adap);
+  my @adapters;
   my $modprobes = "";
   my $configfile = "";
 
@@ -1794,27 +1804,43 @@ sub generate_modprobes
   $configfile .= "# I2C module options\n";
   $configfile .= "alias char-major-89 i2c-dev\n";
 
-  # Collect all adapters
+  # Collect all loaded adapters
+  open INPUTFILE,"/proc/bus/i2c" or die "Couldn't open /proc/bus/i2c?!?";
+  while (<INPUTFILE>) {
+    my ($dev_nr,$type,$adap,$algo) = /^i2c-(\S+)\s+(\S+)\s+(.*?)\s*\t\s*(.*?)\s+$/;
+    next if ($type eq "dummy");
+    $adapters[$dev_nr]->{driver} = find_adapter_driver($adap,$algo);
+  }
+  close INPUTFILE;
+
+  # Collect all adapters used
   $nr = 0;
+  $isa = 0;
   $modprobes .= "# I2C adapter drivers\n";
   foreach $chip (@chips_detected) {
     foreach $detection (@{$chip->{detected}}) {
-      %adapters->{$detection->{i2c_driver}} = $nr ++
-            if exists $detection->{i2c_driver} and 
-               not exists %adapters->{$detection->{i2c_driver}} and
-               not (exists $detection->{isa_addr} and $prefer_isa);
-      %adapters->{"i2c-isa"} = $nr ++ 
-            if exists $detection->{isa_addr} and 
-               not exists %adapters->{"i2c-isa"} and
-               not (exists $detection->{i2c_driver} and not $prefer_isa);
+      # If there is more than one bus detected by a driver, they are
+      # still all added. So we number them in the correct order
+      if (exists $detection->{i2c_driver} and
+          not exists $adapters[$detection->{i2c_devnr}]->{nr} and 
+          not (exists $detection->{isa_addr} and $prefer_isa)) {
+         foreach $adap (@adapters) {
+           $adap->{nr_later} = $nr++ if $adap->{driver} eq $detection->{i2c_driver};
+         }
+      }
+      if (exists $detection->{isa_addr} and
+          not (exists $detection->{i2c_driver} and not $prefer_isa)) {
+           $isa=1;
+      }
     }
   }
-  for ($i = 0; $i < $nr; $i ++) {
-    foreach $detection (keys %adapters) {
-      $modprobes .= "modprobe $detection\n", last 
-                 if $adapters{$detection} == $i;
+
+  for ($i = 0; $i < $nr; $i++) {
+    foreach $adap (@adapters) {
+      $modprobes .= "modprobe $adap->{driver}\n" if (defined($adap->{nr_later}) and $adap->{nr_later} == $i);
     }
   }
+  $modprobes .= "modprobe i2c-isa\n" if ($isa);
 
   # Now determine the chip probe lines
   $modprobes .= "# I2C chip drivers\n";
@@ -1824,38 +1850,35 @@ sub generate_modprobes
     @optionlist = ();
     @probelist = ();
 
-    # Handle detects out-of-range
+    # Handle detects at addresses normally not probed
     foreach $detection (@{$chip->{detected}}) {
-      push @probelist, %adapters->{$detection->{i2c_driver}},
+      push @probelist, $adapters[$detection->{i2c_devnr}]->{nr_later},
                        $detection->{i2c_addr}
-           if exists $detection->{i2c_driver} and
-              exists %adapters->{$detection->{i2c_driver}} and
+           if exists $detection->{i2c_addr} and
               exists $detection->{i2c_extra};
       push @probelist, -1, $detection->{isa_addr}
            if exists $detection->{isa_addr} and
-              exists %adapters->{"i2c-isa"} and
               exists $detection->{isa_extra};
     }
 
     # Handle misdetects
     foreach $detection (@{$chip->{misdetected}}) {
-      push @optionlist, %adapters->{$detection->{i2c_driver}},
+      push @optionlist, $adapters[$detection->{i2c_devnr}]->{nr_later},
                        $detection->{i2c_addr}
-           if exists $detection->{i2c_driver} and
-              exists %adapters->{$detection->{i2c_driver}};
+           if exists $detection->{i2c_addr} and
+              exists $adapters[$detection->{i2c_devnr}]->{nr_later};
       push @optionlist, -1, $detection->{isa_addr}
-           if exists $detection->{isa_addr} and
-              exists %adapters->{"i2c-isa"};
+           if exists $detection->{isa_addr} and $isa;
     }
 
     # Handle aliases
     foreach $detection (@{$chip->{detected}}) {
       if (exists $detection->{i2c_driver} and 
           exists $detection->{isa_addr} and
-          exists %adapters->{$detection->{i2c_driver}} and
-          exists %adapters->{"i2c-isa"}) {
+          exists $adapters[$detection->{i2c_devnr}]->{nr_later} and
+          $isa) {
         if ($prefer_isa) {
-          push @optionlist,%adapters->{$detection->{i2c_driver}},
+          push @optionlist,$adapters[$detection->{i2c_devnr}]->{nr_later},
                            $detection->{i2c_addr};
         } else {
           push @optionlist, -1, $detection->{isa_addr}