vserver 1.9.5.x5

[linux-2.6.git] / include / linux / i2c-vid.h

diff --git a/include/linux/i2c-vid.h b/include/linux/i2c-vid.h
index 6242409..974835e 100644 (file)
--- a/include/linux/i2c-vid.h
+++ b/include/linux/i2c-vid.h
@@ -29,7 +29,22 @@
 */
 
 /*
-    Legal val values 00 - 1F.
+    AMD Opteron processors don't follow the Intel VRM spec.
+    I'm going to "make up" 2.4 as the VRM spec for the Opterons.
+    No good reason just a mnemonic for the 24x Opteron processor
+    series
+
+    Opteron VID encoding is:
+
+       00000  =  1.550 V
+       00001  =  1.525 V
+        . . . .
+       11110  =  0.800 V
+       11111  =  0.000 V (off)
+ */
+
+/*
+    Legal val values 0x00 - 0x1f; except for VRD 10.0, 0x00 - 0x3f.
     vrm is the Intel VRM document version.
     Note: vrm version is scaled by 10 and the return value is scaled by 1000
     to avoid floating point in the kernel.
@@ -41,9 +56,28 @@ int i2c_which_vrm(void);
 
 static inline int vid_from_reg(int val, int vrm)
 {
+       int vid;
+
        switch(vrm) {
+
        case  0:
                return 0;
+
+       case 100:               /* VRD 10.0 */
+               if((val & 0x1f) == 0x1f)
+                       return 0;
+               if((val & 0x1f) <= 0x09 || val == 0x0a)
+                       vid = 10875 - (val & 0x1f) * 250;
+               else
+                       vid = 18625 - (val & 0x1f) * 250;
+               if(val & 0x20)
+                       vid -= 125;
+               vid /= 10;      /* only return 3 dec. places for now */
+               return vid;
+
+       case 24:                /* Opteron processor */
+               return(val == 0x1f ? 0 : 1550 - val * 25);
+
        case 91:                /* VRM 9.1 */
        case 90:                /* VRM 9.0 */
                return(val == 0x1f ? 0 :