Bug#16501: autodetection of sbus graphic cards

Add automatic detection of the graphic driver to load for sbus devices.
This allows xorg to work on those devices without a "Device" section.

Debian bug#483942.

Signed-off-by: Julien Cristau <jcristau@debian.org>

3 files changed, 80 insertions, 14 deletions

diff --git a/hw/xfree86/common/xf86AutoConfig.c b/hw/xfree86/common/xf86AutoConfig.c
index 793ecfa85..a9a1fd207 100644
--- a/hw/xfree86/common/xf86AutoConfig.c
+++ b/hw/xfree86/common/xf86AutoConfig.c
@@ -39,6 +39,9 @@
 #include "xf86Config.h"
 #include "xf86Priv.h"
 #include "xf86_OSlib.h"
+#ifdef __sparc__
+# include "xf86sbusBus.h"
+#endif
 #include "dirent.h"
 
 #ifdef sun
@@ -472,6 +475,13 @@ listPossibleVideoDrivers(char *matches[], int nmatches)
 	}
     }
 #endif
+#ifdef __sparc__
+    {
+	char *sbusDriver = sparcDriverName();
+	if (sbusDriver)
+	    matches[i++] = xnfstrdup(sbusDriver);
+    }
+#endif
 
     /* Find the primary device, and get some information about it. */
     iter = pci_slot_match_iterator_create(NULL);
diff --git a/hw/xfree86/common/xf86sbusBus.h b/hw/xfree86/common/xf86sbusBus.h
index 8576409d4..6161a08e2 100644
--- a/hw/xfree86/common/xf86sbusBus.h
+++ b/hw/xfree86/common/xf86sbusBus.h
@@ -60,6 +60,7 @@ extern struct sbus_devtable {
     int devId;
     int fbType;
     char *promName;
+    char *driverName;
     char *descr;
 } sbusDeviceTable[];
 
@@ -93,5 +94,6 @@ int sparcPromGetBool(sbusPromNodePtr pnode, const char *prop);
 void sparcPromAssignNodes(void);
 char * sparcPromNode2Pathname(sbusPromNodePtr pnode);
 int sparcPromPathname2Node(const char *pathName);
+char *sparcDriverName(void);
 
 #endif /* _XF86_SBUSBUS_H */
diff --git a/hw/xfree86/os-support/bus/Sbus.c b/hw/xfree86/os-support/bus/Sbus.c
index 8763d0ece..1363d5746 100644
--- a/hw/xfree86/os-support/bus/Sbus.c
+++ b/hw/xfree86/os-support/bus/Sbus.c
@@ -54,20 +54,20 @@ static struct openpromio *promOpio;
 sbusDevicePtr *xf86SbusInfo = NULL;
 
 struct sbus_devtable sbusDeviceTable[] = {
-    { SBUS_DEVICE_BW2, FBTYPE_SUN2BW, "bwtwo", "Sun Monochrome (bwtwo)" },
-    { SBUS_DEVICE_CG2, FBTYPE_SUN2COLOR, "cgtwo", "Sun Color2 (cgtwo)" },
-    { SBUS_DEVICE_CG3, FBTYPE_SUN3COLOR, "cgthree", "Sun Color3 (cgthree)" },
-    { SBUS_DEVICE_CG4, FBTYPE_SUN4COLOR, "cgfour", "Sun Color4 (cgfour)" },
-    { SBUS_DEVICE_CG6, FBTYPE_SUNFAST_COLOR, "cgsix", "Sun GX" },
-    { SBUS_DEVICE_CG8, FBTYPE_MEMCOLOR, "cgeight", "Sun CG8/RasterOps" },
-    { SBUS_DEVICE_CG12, FBTYPE_SUNGP3, "cgtwelve", "Sun GS (cgtwelve)" },
-    { SBUS_DEVICE_CG14, FBTYPE_MDICOLOR, "cgfourteen", "Sun SX" },
-    { SBUS_DEVICE_GT, FBTYPE_SUNGT, "gt", "Sun Graphics Tower" },
-    { SBUS_DEVICE_MGX, -1, "mgx", "Quantum 3D MGXplus" },
-    { SBUS_DEVICE_LEO, FBTYPE_SUNLEO, "leo", "Sun ZX or Turbo ZX" },
-    { SBUS_DEVICE_TCX, FBTYPE_TCXCOLOR, "tcx", "Sun TCX" },
-    { SBUS_DEVICE_FFB, FBTYPE_CREATOR, "ffb", "Sun FFB" },
-    { SBUS_DEVICE_FFB, FBTYPE_CREATOR, "afb", "Sun Elite3D" },
+    { SBUS_DEVICE_BW2, FBTYPE_SUN2BW, "bwtwo", "sunbw2", "Sun Monochrome (bwtwo)" },
+    { SBUS_DEVICE_CG2, FBTYPE_SUN2COLOR, "cgtwo", NULL, "Sun Color2 (cgtwo)" },
+    { SBUS_DEVICE_CG3, FBTYPE_SUN3COLOR, "cgthree", "suncg3", "Sun Color3 (cgthree)" },
+    { SBUS_DEVICE_CG4, FBTYPE_SUN4COLOR, "cgfour", NULL, "Sun Color4 (cgfour)" },
+    { SBUS_DEVICE_CG6, FBTYPE_SUNFAST_COLOR, "cgsix", "suncg6", "Sun GX" },
+    { SBUS_DEVICE_CG8, FBTYPE_MEMCOLOR, "cgeight", NULL, "Sun CG8/RasterOps" },
+    { SBUS_DEVICE_CG12, FBTYPE_SUNGP3, "cgtwelve", NULL, "Sun GS (cgtwelve)" },
+    { SBUS_DEVICE_CG14, FBTYPE_MDICOLOR, "cgfourteen", "suncg14", "Sun SX" },
+    { SBUS_DEVICE_GT, FBTYPE_SUNGT, "gt", NULL, "Sun Graphics Tower" },
+    { SBUS_DEVICE_MGX, -1, "mgx", NULL, "Quantum 3D MGXplus" },
+    { SBUS_DEVICE_LEO, FBTYPE_SUNLEO, "leo", "sunleo", "Sun ZX or Turbo ZX" },
+    { SBUS_DEVICE_TCX, FBTYPE_TCXCOLOR, "tcx", "suntcx", "Sun TCX" },
+    { SBUS_DEVICE_FFB, FBTYPE_CREATOR, "ffb", "sunffb", "Sun FFB" },
+    { SBUS_DEVICE_FFB, FBTYPE_CREATOR, "afb", "sunffb", "Sun Elite3D" },
     { 0, 0, NULL }
 };
 
@@ -240,6 +240,60 @@ sparcPromGetBool(sbusPromNodePtr pnode, const char *prop)
     return promGetBool(prop);
 }
 
+static char *
+promWalkGetDriverName(int node, int oldnode)
+{
+    int nextnode;
+    int len;
+    char *prop;
+    int devId, i;
+
+    prop = promGetProperty("device_type", &len);
+    if (prop && (len > 0)) do {
+	if (!strcmp(prop, "display")) {
+	    prop = promGetProperty("name", &len);
+	    if (!prop || len <= 0)
+		break;
+	    while ((*prop >= 'A' && *prop <= 'Z') || *prop == ',')
+		prop++;
+	    for (i = 0; sbusDeviceTable[i].devId; i++)
+		if (!strcmp(prop, sbusDeviceTable[i].promName))
+		    break;
+	    devId = sbusDeviceTable[i].devId;
+	    if (!devId)
+		break;
+	    if (sbusDeviceTable[i].driverName)
+	    	return sbusDeviceTable[i].driverName;
+	}
+    } while (0);
+
+    nextnode = promGetChild(node);
+    if (nextnode) {
+	char *name;
+	name = promWalkGetDriverName(nextnode, node);
+	if (name)
+	    return name;
+    }
+
+    nextnode = promGetSibling(node);
+    if (nextnode)
+	return promWalkGetDriverName(nextnode, node);
+    return NULL;
+}
+
+char *
+sparcDriverName(void)
+{
+    char *name;
+
+    if (sparcPromInit() < 0)
+	    return NULL;
+    promGetSibling(0);
+    name = promWalkGetDriverName(promRootNode, 0);
+    sparcPromClose();
+    return name;
+}
+
 static void
 promWalkAssignNodes(int node, int oldnode, int flags, sbusDevicePtr *devicePtrs)
 {