xorg DDX: implement NewInputDeviceRequest

Implement NewInputDeviceRequest for Xorg, mainly written by Kristian Høgsberg.
Move MatchInput to xf86Helper.c, as xf86LookupInputDriver.

hw/xfree86/common/xf86Helper.c

@@ -142,6 +142,19 @@ xf86DeleteInputDriver(int drvIndex)
     xf86InputDriverList[drvIndex] = NULL;
 }
 
+InputDriverPtr
+xf86LookupInputDriver(const char *name)
+{
+    int i;
+
+    for (i = 0; i < xf86NumInputDrivers; i++) {
+       if (xf86InputDriverList[i] && xf86InputDriverList[i]->driverName &&
+           xf86NameCmp(name, xf86InputDriverList[i]->driverName) == 0)
+           return xf86InputDriverList[i];
+    }
+    return NULL;
+}
+
 _X_EXPORT void
 xf86AddModuleInfo(ModuleInfoPtr info, pointer module)
 {

hw/xfree86/common/xf86InPriv.h

@@ -41,4 +41,7 @@ extern int xf86NumInputDrivers;
 /* xf86Xinput.c */
 void xf86ActivateDevice(InputInfoPtr pInfo);
 
+/* xf86Helper.c */
+InputDriverPtr xf86LookupInputDriver(const char *name);
+
 #endif /* _xf86InPriv_h */

hw/xfree86/common/xf86Init.c

@@ -985,21 +985,6 @@ InitOutput(ScreenInfo *pScreenInfo, int argc, char **argv)
 				 NULL);
 }
 
-
-static InputDriverPtr
-MatchInput(IDevPtr pDev)
-{
-    int i;
-
-    for (i = 0; i < xf86NumInputDrivers; i++) {
-	if (xf86InputDriverList[i] && xf86InputDriverList[i]->driverName &&
-	    xf86NameCmp(pDev->driver, xf86InputDriverList[i]->driverName) == 0)
-	    return xf86InputDriverList[i];
-    }
-    return NULL;
-}
-
-
 /*
  * InitInput --
  *      Initialize all supported input devices.
@@ -1033,7 +1018,7 @@ InitInput(argc, argv)
 	    }
 #endif
 
-	    if ((pDrv = MatchInput(pDev)) == NULL) {
+	    if ((pDrv = xf86LookupInputDriver(pDev->driver)) == NULL) {
 		xf86Msg(X_ERROR, "No Input driver matching `%s'\n", pDev->driver);
 		/* XXX For now, just continue. */
 		continue;

hw/xfree86/common/xf86Xinput.c

@@ -622,6 +622,82 @@ ChangeDeviceControl (ClientPtr client, DeviceIntPtr dev, xDeviceCtl *control)
 }
 #endif
 
+int
+NewInputDeviceRequest (InputOption *options)
+{
+    IDevRec *idev = NULL;
+    InputDriverPtr drv = NULL;
+    InputInfoPtr pInfo = NULL;
+    InputOption *option = NULL;
+    DeviceIntPtr dev = NULL;
+    int i;
+
+    idev = xcalloc(sizeof(*idev), 1);
+    if (!idev)
+        return BadAlloc;
+
+    for (option = options; option; option = option->next) {
+        if (strcmp(option->key, "driver") == 0) {
+            if (!xf86LoadOneModule(option->value, NULL))
+                return BadName;
+            drv = xf86LookupInputDriver(option->value);
+            if (!drv) {
+                xf86Msg(X_ERROR, "No input driver matching `%s'\n",
+                        option->value);
+                return BadName;
+            }
+            idev->driver = xstrdup(option->value);
+            if (!idev->driver) {
+                xfree(idev);
+                return BadAlloc;
+            }
+        }
+        if (strcmp(option->key, "name") == 0 ||
+            strcmp(option->key, "identifier") == 0) {
+            idev->identifier = xstrdup(option->value);
+            if (!idev->identifier) {
+                xfree(idev);
+                return BadAlloc;
+            }
+        }
+    }
+
+    if (!drv->PreInit) {
+        xf86Msg(X_ERROR,
+                "Input driver `%s' has no PreInit function (ignoring)\n",
+                drv->driverName);
+        return BadImplementation;
+    }
+
+    idev->commonOptions = NULL;
+    for (option = options; option; option = option->next)
+        idev->commonOptions = xf86addNewOption(idev->commonOptions,
+                                               option->key, option->value);
+    idev->extraOptions = NULL;
+
+    pInfo = drv->PreInit(drv, idev, 0);
+
+    if (!pInfo) {
+        xf86Msg(X_ERROR, "PreInit returned NULL for \"%s\"\n", idev->identifier);
+        return BadMatch;
+    }
+    else if (!(pInfo->flags & XI86_CONFIGURED)) {
+        xf86Msg(X_ERROR, "PreInit failed for input device \"%s\"\n",
+                idev->identifier);
+        xf86DeleteInput(pInfo, 0);
+        return BadMatch;
+    }
+
+    xf86ActivateDevice(pInfo);
+
+    dev = pInfo->dev;
+    dev->inited = ((*dev->deviceProc)(dev, DEVICE_INIT) == Success);
+    if (dev->inited && dev->startup)
+        EnableDevice(dev);
+
+    return Success;
+}
+
 /*
  * adapted from mieq.c to support extended events
  *