[OpenBIOS] [PATCH 2/6] ppc: fix ESCC reg properties

[Mark Cave-Ayland]

I/O offsets were wrong in legacy mode and some were missing in non-legacy mode.
This fixes serial port detection in NetBSD, which was ignoring it.
This also partly fixes MacOS 9.2, which relies on them to initialize OpenTransport.

Based upon an original patch from Hervé Poussineau .

Signed-off-by: Mark Cave-Ayland 
---
 openbios-devel/drivers/escc.c |   43 ++++++++++++++++++++++++++++-------------
 1 file changed, 30 insertions(+), 13 deletions(-)

diff --git a/openbios-devel/drivers/escc.c b/openbios-devel/drivers/escc.c
index 9b87083..a6d92a4 100644
--- a/openbios-devel/drivers/escc.c
+++ b/openbios-devel/drivers/escc.c
@@ -388,7 +388,20 @@ escc_add_channel(const char *path, const char *node, phys_addr_t addr,
     cell props[10];
     int index;
     int legacy;
-
+    int reg_offsets[2][2][3] = {
+        {
+            /* ch-b */
+            { 0x20, 0x30, 0x50 },
+            /* ch-a */
+            { 0x00, 0x10, 0x40 }
+        },{
+            /* legacy ch-b */
+            { 0x4, 0x6, 0xa },
+            /* legacy ch-a */
+            { 0x0, 0x2, 0x8 }
+        }
+    };
+    
     switch (esnum) {
         case 2: index = 1; legacy = 0; break;
         case 3: index = 0; legacy = 0; break;
@@ -425,17 +438,21 @@ escc_add_channel(const char *path, const char *node, phys_addr_t addr,
     set_property(dnode, "compatible", buf, 9);

if (legacy) {
-        props[0] = IO_ESCC_LEGACY_OFFSET + index * 0x4;
-        props[1] = 0x00000001;
-        props[2] = IO_ESCC_LEGACY_OFFSET + index * 0x4 + 2;
-        props[3] = 0x00000001;
-        props[4] = IO_ESCC_LEGACY_OFFSET + index * 0x4 + 6;
-        props[5] = 0x00000001;
+        props[0] = IO_ESCC_LEGACY_OFFSET + reg_offsets[legacy][index][0];
+        props[1] = 0x1;
+        props[2] = IO_ESCC_LEGACY_OFFSET + reg_offsets[legacy][index][1];
+        props[3] = 0x1;
+        props[4] = IO_ESCC_LEGACY_OFFSET + reg_offsets[legacy][index][2];
+        props[5] = 0x1;
         set_property(dnode, "reg", (char *)&props, 6 * sizeof(cell));
     } else {
-        props[0] = IO_ESCC_OFFSET + index * 0x20;
-        props[1] = 0x00000020;
-        set_property(dnode, "reg", (char *)&props, 2 * sizeof(cell));
+        props[0] = IO_ESCC_OFFSET + reg_offsets[legacy][index][0];
+        props[1] = 0x1;
+        props[2] = IO_ESCC_OFFSET + reg_offsets[legacy][index][1];
+        props[3] = 0x1;
+        props[4] = IO_ESCC_OFFSET + reg_offsets[legacy][index][2];
+        props[5] = 0x1;
+        set_property(dnode, "reg", (char *)&props, 6 * sizeof(cell));
     }

if (legacy) {
@@ -446,13 +463,13 @@ escc_add_channel(const char *path, const char *node, phys_addr_t addr,
     OLDWORLD(set_property(dnode, "AAPL,address",
             (char *)&props, 1 * sizeof(cell)));

-    props[0] = 0x00000010 - index;
+    props[0] = 0x10 - index;
     OLDWORLD(set_property(dnode, "AAPL,interrupts",
             (char *)&props, 1 * sizeof(cell)));

props[0] = (0x24) + index;
-    props[1] = 0;
-    props[2] = 0;
+    props[1] = 0x0;
+    props[2] = 0x0;
     NEWWORLD(set_property(dnode, "interrupts",
              (char *)&props, 3 * sizeof(cell)));