evdev 2.1.1

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
(cherry picked from commit 0592d97fbb)

configure.ac

@@ -22,7 +22,7 @@
 
 AC_PREREQ(2.57)
 AC_INIT([xf86-input-evdev],
-        2.0.99.2,
+        2.1.1,
         [https://bugs.freedesktop.org/enter_bug.cgi?product=xorg],
         xf86-input-evdev)
 

include/evdev-properties.h

@@ -58,4 +58,12 @@
 /* CARD8 */
 #define EVDEV_PROP_REOPEN "Evdev Reopen Attempts"
 
+/* Run-time calibration */
+/* CARD32, 4 values [minx, maxx, miny, maxy], or no values for unset */
+#define EVDEV_PROP_CALIBRATION "Evdev Axis Calibration"
+
+/* Swap x and y axis. */
+/* BOOL */
+#define EVDEV_PROP_SWAP_AXES "Evdev Axes Swap"
+
 #endif

man/evdev.man

@@ -147,6 +147,9 @@ waking up from suspend). In between each attempt is a 100ms wait. Default: 10.
 .BI "Option \*qInvertY\*q \*q" Bool \*q
 Invert the given axis. Default: off. Property: "Evdev Axis Inversion".
 .TP 7
+.BI "Option \*qSwapAxes\*q \*q" Bool \*q
+Swap x/y axes. Default: off. Property: "Evdev Axes Swap".
+.TP 7
 .BI "Option \*qGrabDevice\*q \*q" boolean \*q
 Force a grab on the event device. Doing so will ensure that no other driver
 can initialise the same device and it will also stop the device from sending
@@ -186,9 +189,17 @@ value.
 .TP 7
 .BI "Evdev Axis Inversion"
 2 boolean values (8 bit, 0 or 1), order X, Y. 1 inverts the axis.
+.BI "Evdev Axis Calibration"
+4 32-bit values, order min-x, max-x, min-y, max-y or 0 values to disable
+run-time axis calibration. This feature is required for devices that need to
+scale to a different coordinate system than originally reported to the X
+server, such as touchscreens that require run-time calibration.
+.TP 7
+.BI "Evdev Axis Swap"
+1 boolean values (8 bit, 0 or 1). 1 swaps x/y axes.
 
 .SH AUTHORS
 Kristian Høgsberg.
 .SH "SEE ALSO"
-__xservername__(__appmansuffix__), __xconfigfile__(__filemansuffix__), xorgconfig(__appmansuffix__), Xserver(__appmansuffix__), X(__miscmansuffix__),
+__xservername__(__appmansuffix__), __xconfigfile__(__filemansuffix__), Xserver(__appmansuffix__), X(__miscmansuffix__),
 README.mouse.

src/emuMB.c

@@ -231,6 +231,11 @@ EvdevMBEmuFilterEvent(InputInfoPtr pInfo, int button, BOOL press)
     if (!pEvdev->emulateMB.enabled)
         return ret;
 
+    if (button == 2) {
+        EvdevMBEmuEnable(pInfo, FALSE);
+        return ret;
+    }
+
     /* don't care about other buttons */
     if (button != 1 && button != 3)
         return ret;
@@ -311,12 +316,17 @@ EvdevMBEmuPreInit(InputInfoPtr pInfo)
         pEvdev->emulateMB.enabled = xf86SetBoolOption(pInfo->options,
                                                       "Emulate3Buttons",
                                                       MBEMU_ENABLED);
-        xf86Msg(X_INFO, "%s: Forcing middle mouse button emulation.\n",
-                        pInfo->name);
+        xf86Msg(X_INFO, "%s: Forcing middle mouse button emulation %s.\n",
+                pInfo->name, (pEvdev->emulateMB.enabled) ? "on" : "off");
     }
 
     pEvdev->emulateMB.timeout = xf86SetIntOption(pInfo->options,
                                                  "Emulate3Timeout", 50);
+}
+
+void
+EvdevMBEmuOn(InputInfoPtr pInfo)
+{
     RegisterBlockAndWakeupHandlers (EvdevMBEmuBlockHandler,
                                     EvdevMBEmuWakeupHandler,
                                     (pointer)pInfo);

src/evdev.c

@@ -32,6 +32,7 @@
 
 #include <X11/keysym.h>
 
+#include <sys/stat.h>
 #include <unistd.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -51,6 +52,10 @@
 #include <evdev-properties.h>
 #endif
 
+#ifndef MAXDEVICES
+#include <inputstr.h> /* for MAX_DEVICES */
+#define MAXDEVICES MAX_DEVICES
+#endif
 
 /* 2.4 compatibility */
 #ifndef EVIOCGRAB
@@ -76,6 +81,7 @@
 #define EVDEV_TOUCHPAD		(1 << 4)
 #define EVDEV_INITIALIZED	(1 << 5) /* WheelInit etc. called already? */
 #define EVDEV_TOUCHSCREEN	(1 << 6)
+#define EVDEV_CALIBRATED	(1 << 7) /* run-time calibrated? */
 
 #define MIN_KEYCODE 8
 #define GLYPHS_PER_KEY 2
@@ -107,8 +113,92 @@ static int EvdevSetProperty(DeviceIntPtr dev, Atom atom,
                             XIPropertyValuePtr val, BOOL checkonly);
 static Atom prop_invert = 0;
 static Atom prop_reopen = 0;
+static Atom prop_calibration = 0;
+static Atom prop_swap = 0;
 #endif
 
+/* All devices the evdev driver has allocated and knows about.
+ * MAXDEVICES is safe as null-terminated array, as two devices (VCP and VCK)
+ * cannot be used by evdev, leaving us with a space of 2 at the end. */
+static EvdevPtr evdev_devices[MAXDEVICES] = {0};
+
+static int
+EvdevGetMajorMinor(InputInfoPtr pInfo)
+{
+    struct stat st;
+
+    if (fstat(pInfo->fd, &st) == -1)
+    {
+        xf86Msg(X_ERROR, "%s: stat failed (%s). cannot check for duplicates.\n",
+                pInfo->name, strerror(errno));
+        return 0;
+    }
+
+    return st.st_rdev;
+}
+
+/**
+ * Return TRUE if one of the devices we know about has the same min/maj
+ * number.
+ */
+static BOOL
+EvdevIsDuplicate(InputInfoPtr pInfo)
+{
+    EvdevPtr pEvdev = pInfo->private;
+    EvdevPtr* dev   = evdev_devices;
+
+    if (pEvdev->min_maj)
+    {
+        while(*dev)
+        {
+            if ((*dev) != pEvdev &&
+                (*dev)->min_maj &&
+                (*dev)->min_maj == pEvdev->min_maj)
+                return TRUE;
+            dev++;
+        }
+    }
+    return FALSE;
+}
+
+/**
+ * Add to internal device list.
+ */
+static void
+EvdevAddDevice(InputInfoPtr pInfo)
+{
+    EvdevPtr pEvdev = pInfo->private;
+    EvdevPtr* dev = evdev_devices;
+
+    while(*dev)
+        dev++;
+
+    *dev = pEvdev;
+}
+
+/**
+ * Remove from internal device list.
+ */
+static void
+EvdevRemoveDevice(InputInfoPtr pInfo)
+{
+    EvdevPtr pEvdev = pInfo->private;
+    EvdevPtr *dev   = evdev_devices;
+    int count       = 0;
+
+    while(*dev)
+    {
+        count++;
+        if (*dev == pEvdev)
+        {
+            memmove(dev, dev + 1,
+                    sizeof(evdev_devices) - (count * sizeof(EvdevPtr)));
+            break;
+        }
+        dev++;
+    }
+}
+
 
 static void
 SetXkbOption(InputInfoPtr pInfo, char *name, char **option)
@@ -146,7 +236,7 @@ static void
 PostKbdEvent(InputInfoPtr pInfo, struct input_event *ev, int value)
 {
     int code = ev->code + MIN_KEYCODE;
-    static char warned[KEY_MAX];
+    static char warned[KEY_CNT];
 
     /* filter repeat events for chording keys */
     if (value == 2 &&
@@ -158,7 +248,7 @@ PostKbdEvent(InputInfoPtr pInfo, struct input_event *ev, int value)
          ev->code == KEY_SCROLLLOCK)) /* XXX windows keys? */
         return;
 
-    if (code > 255 && ev->code < KEY_MAX) {
+    if (code > 255 && ev->code <= KEY_MAX) {
 	if (!warned[ev->code])
 	    xf86Msg(X_WARNING, "%s: unable to handle keycode %d\n",
 		    pInfo->name, ev->code);
@@ -202,6 +292,7 @@ EvdevReopenTimer(OsTimerPtr timer, CARD32 time, pointer arg)
             DisableDevice(pInfo->dev);
             close(pInfo->fd);
             pInfo->fd = -1;
+            pEvdev->min_maj = 0; /* don't hog the device */
         }
         pEvdev->reopen_left = 0;
         return 0;
@@ -214,6 +305,7 @@ EvdevReopenTimer(OsTimerPtr timer, CARD32 time, pointer arg)
         xf86Msg(X_ERROR, "%s: Failed to reopen device after %d attempts.\n",
                 pInfo->name, pEvdev->reopen_attempts);
         DisableDevice(pInfo->dev);
+        pEvdev->min_maj = 0; /* don't hog the device */
         return 0;
     }
 
@@ -225,13 +317,14 @@ EvdevReadInput(InputInfoPtr pInfo)
 {
     struct input_event ev;
     int len, value;
-    int dx, dy;
+    int dx, dy, tmp;
     unsigned int abs;
     unsigned int button;
     EvdevPtr pEvdev = pInfo->private;
 
     dx = 0;
     dy = 0;
+    tmp = 0;
     abs = 0;
 
     while (xf86WaitForInput (pInfo->fd, 0) > 0) {
@@ -326,7 +419,7 @@ EvdevReadInput(InputInfoPtr pInfo)
                 /* Intentional fallthrough! */
 
             default:
-		button = EvdevUtilButtonEventToButtonNumber(ev.code);
+		button = EvdevUtilButtonEventToButtonNumber(pEvdev, ev.code);
 
 		/* Handle drag lock */
 		if (EvdevDragLockFilterEvent(pInfo, button, value))
@@ -367,6 +460,11 @@ EvdevReadInput(InputInfoPtr pInfo)
     }
 
     if (dx != 0 || dy != 0) {
+        if (pEvdev->swap_axes) {
+            tmp = dx;
+            dx = dy;
+            dy = tmp;
+        }
         if (pEvdev->invert_x)
             dx *= -1;
         if (pEvdev->invert_y)
@@ -385,12 +483,23 @@ EvdevReadInput(InputInfoPtr pInfo)
      */
     if (abs && pEvdev->tool) {
         int abs_x, abs_y;
-        abs_x = pEvdev->abs_x;
-        abs_y = pEvdev->abs_y;
+        abs_x = (pEvdev->swap_axes) ? pEvdev->abs_y : pEvdev->abs_x;
+        abs_y = (pEvdev->swap_axes) ? pEvdev->abs_x : pEvdev->abs_y;
+
+        if (pEvdev->flags & EVDEV_CALIBRATED)
+        {
+            abs_x = xf86ScaleAxis(abs_x,
+                    pEvdev->max_x, pEvdev->min_x,
+                    pEvdev->calibration.max_x, pEvdev->calibration.min_x);
+            abs_y = xf86ScaleAxis(abs_y,
+                    pEvdev->max_y, pEvdev->min_y,
+                    pEvdev->calibration.max_y, pEvdev->calibration.min_y);
+        }
+
         if (pEvdev->invert_x)
-            abs_x = pEvdev->max_x - abs_x;
+            abs_x = pEvdev->max_x - (abs_x - pEvdev->min_x);
         if (pEvdev->invert_y)
-            abs_y = pEvdev->max_y - abs_y;
+            abs_y = pEvdev->max_y - (abs_y - pEvdev->min_y);
 
 	xf86PostMotionEvent(pInfo->dev, TRUE, 0, 2, abs_x, abs_y);
     }
@@ -404,9 +513,6 @@ EvdevPtrCtrlProc(DeviceIntPtr device, PtrCtrl *ctrl)
     /* Nothing to do, dix handles all settings */
 }
 
-/* FIXME: this map works with evdev keyboards, but all the xkb maps
- * probably don't.  The easiest is to remap the event keycodes.  */
-
 static KeySym map[] = {
     /* 0x00 */  NoSymbol,       NoSymbol,
     /* 0x01 */  XK_Escape,      NoSymbol,
@@ -748,7 +854,7 @@ EvdevAddKeyClass(DeviceIntPtr device)
         SetXkbOption(pInfo, "xkb_rules", &pEvdev->xkb_rules);
         SetXkbOption(pInfo, "xkb_model", &pEvdev->xkb_model);
 	if (!pEvdev->xkb_model)
-	    SetXkbOption(pInfo, "XkbModel", &pEvdev->xkb_rules);
+	    SetXkbOption(pInfo, "XkbModel", &pEvdev->xkb_model);
         SetXkbOption(pInfo, "xkb_layout", &pEvdev->xkb_layout);
 	if (!pEvdev->xkb_layout)
 	    SetXkbOption(pInfo, "XkbLayout", &pEvdev->xkb_layout);
@@ -1007,7 +1113,17 @@ EvdevOn(DeviceIntPtr device)
         pEvdev->reopen_timer = TimerSet(NULL, 0, 100, EvdevReopenTimer, pInfo);
     } else
     {
+        pEvdev->min_maj = EvdevGetMajorMinor(pInfo);
+        if (EvdevIsDuplicate(pInfo))
+        {
+            xf86Msg(X_WARNING, "%s: Refusing to enable duplicate device.\n",
+                    pInfo->name);
+            return !Success;
+        }
+
+        xf86FlushInput(pInfo->fd);
         xf86AddEnabledDevice(pInfo);
+        EvdevMBEmuOn(pInfo);
         pEvdev->flags |= EVDEV_INITIALIZED;
         device->public.on = TRUE;
     }
@@ -1034,6 +1150,8 @@ EvdevProc(DeviceIntPtr device, int what)
         return EvdevOn(device);
 
     case DEVICE_OFF:
+        if (pEvdev->flags & EVDEV_INITIALIZED)
+            EvdevMBEmuFinalize(pInfo);
         if (pInfo->fd != -1)
         {
             if (pEvdev->grabDevice && ioctl(pInfo->fd, EVIOCGRAB, (void *)0))
@@ -1043,6 +1161,7 @@ EvdevProc(DeviceIntPtr device, int what)
             close(pInfo->fd);
             pInfo->fd = -1;
         }
+        pEvdev->min_maj = 0;
         if (pEvdev->flags & EVDEV_INITIALIZED)
             EvdevMBEmuFinalize(pInfo);
         pEvdev->flags &= ~EVDEV_INITIALIZED;
@@ -1060,6 +1179,8 @@ EvdevProc(DeviceIntPtr device, int what)
             close(pInfo->fd);
             pInfo->fd = -1;
         }
+        EvdevRemoveDevice(pInfo);
+        pEvdev->min_maj = 0;
 	break;
     }
 
@@ -1081,12 +1202,12 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
     int i;
 
     char name[1024]                  = {0};
-    long bitmask[NBITS(EV_MAX)]      = {0};
-    long key_bitmask[NBITS(KEY_MAX)] = {0};
-    long rel_bitmask[NBITS(REL_MAX)] = {0};
-    long abs_bitmask[NBITS(ABS_MAX)] = {0};
-    long led_bitmask[NBITS(LED_MAX)] = {0};
-    struct input_absinfo absinfo[ABS_MAX];
+    long bitmask[NLONGS(EV_CNT)]      = {0};
+    long key_bitmask[NLONGS(KEY_CNT)] = {0};
+    long rel_bitmask[NLONGS(REL_CNT)] = {0};
+    long abs_bitmask[NLONGS(ABS_CNT)] = {0};
+    long led_bitmask[NLONGS(LED_CNT)] = {0};
+    struct input_absinfo absinfo[ABS_CNT];
 
     if (ioctl(pInfo->fd,
               EVIOCGNAME(sizeof(name) - 1), name) < 0) {
@@ -1099,7 +1220,7 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
 
     if (ioctl(pInfo->fd,
               EVIOCGBIT(0, sizeof(bitmask)), bitmask) < 0) {
-        xf86Msg(X_ERROR, "ioctl EVIOCGNAME failed: %s\n", strerror(errno));
+        xf86Msg(X_ERROR, "ioctl EVIOCGBIT failed: %s\n", strerror(errno));
         goto error;
     }
 
@@ -1145,7 +1266,7 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
 
     memset(absinfo, 0, sizeof(absinfo));
 
-    for (i = 0; i < ABS_MAX; i++)
+    for (i = ABS_X; i <= ABS_MAX; i++)
     {
         if (TestBit(i, abs_bitmask))
         {
@@ -1181,9 +1302,9 @@ error:
 static int
 EvdevProbe(InputInfoPtr pInfo)
 {
-    long key_bitmask[NBITS(KEY_MAX)] = {0};
-    long rel_bitmask[NBITS(REL_MAX)] = {0};
-    long abs_bitmask[NBITS(ABS_MAX)] = {0};
+    long key_bitmask[NLONGS(KEY_CNT)] = {0};
+    long rel_bitmask[NLONGS(REL_CNT)] = {0};
+    long abs_bitmask[NLONGS(ABS_CNT)] = {0};
     int i, has_axes, has_keys, num_buttons;
     int kernel24 = 0;
     EvdevPtr pEvdev = pInfo->private;
@@ -1367,9 +1488,21 @@ EvdevPreInit(InputDriverPtr drv, IDevPtr dev, int flags)
         return NULL;
     }
 
+    /* Check major/minor of device node to avoid adding duplicate devices. */
+    pEvdev->min_maj = EvdevGetMajorMinor(pInfo);
+    if (EvdevIsDuplicate(pInfo))
+    {
+        xf86Msg(X_WARNING, "%s: device file already in use. Ignoring.\n",
+                pInfo->name);
+        close(pInfo->fd);
+        xf86DeleteInput(pInfo, 0);
+        return NULL;
+    }
+
     pEvdev->reopen_attempts = xf86SetIntOption(pInfo->options, "ReopenAttempts", 10);
     pEvdev->invert_x = xf86SetBoolOption(pInfo->options, "InvertX", FALSE);
     pEvdev->invert_y = xf86SetBoolOption(pInfo->options, "InvertY", FALSE);
+    pEvdev->swap_axes = xf86SetBoolOption(pInfo->options, "SwapAxes", FALSE);
 
     /* Grabbing the event device stops in-kernel event forwarding. In other
        words, it disables rfkill and the "Macintosh mouse button emulation".
@@ -1387,6 +1520,7 @@ EvdevPreInit(InputDriverPtr drv, IDevPtr dev, int flags)
     }
 
     EvdevCacheCompare(pInfo, FALSE); /* cache device data */
+    EvdevAddDevice(pInfo);
 
     if (pEvdev->flags & EVDEV_BUTTON_EVENTS)
     {
@@ -1449,7 +1583,7 @@ _X_EXPORT XF86ModuleData evdevModuleData =
  * returns 0 on non-button event.
  */
 unsigned int
-EvdevUtilButtonEventToButtonNumber(int code)
+EvdevUtilButtonEventToButtonNumber(EvdevPtr pEvdev, int code)
 {
     unsigned int button = 0;
 
@@ -1466,6 +1600,21 @@ EvdevUtilButtonEventToButtonNumber(int code)
 	button = 2;
 	break;
 
+        /* Treat BTN_[0-2] as LMR buttons on devices that do not advertise
+           BTN_LEFT, BTN_MIDDLE, BTN_RIGHT.
+           Otherwise, treat BTN_[0+n] as button 5+n.
+           XXX: This causes duplicate mappings for BTN_0 + n and BTN_SIDE + n
+         */
+    case BTN_0:
+        button = (TestBit(BTN_LEFT, pEvdev->key_bitmask)) ?  8 : 1;
+        break;
+    case BTN_1:
+        button = (TestBit(BTN_MIDDLE, pEvdev->key_bitmask)) ?  9 : 2;
+        break;
+    case BTN_2:
+        button = (TestBit(BTN_RIGHT, pEvdev->key_bitmask)) ?  10 : 3;
+        break;
+
     case BTN_SIDE:
     case BTN_EXTRA:
     case BTN_FORWARD:
@@ -1476,8 +1625,12 @@ EvdevUtilButtonEventToButtonNumber(int code)
 
     default:
 	if ((code > BTN_TASK) && (code < KEY_OK)) {
-	    if (code < BTN_JOYSTICK)
-		button = (code - BTN_LEFT + 5);
+	    if (code < BTN_JOYSTICK) {
+                if (code < BTN_MOUSE)
+                    button = (code - BTN_0 + 5);
+                else
+                    button = (code - BTN_LEFT + 5);
+            }
 	}
     }
 
@@ -1524,6 +1677,26 @@ EvdevInitProperty(DeviceIntPtr dev)
         return;
 
     XISetDevicePropertyDeletable(dev, prop_reopen, FALSE);
+
+
+    prop_calibration = MakeAtom(EVDEV_PROP_CALIBRATION,
+                                strlen(EVDEV_PROP_CALIBRATION), TRUE);
+    rc = XIChangeDeviceProperty(dev, prop_calibration, XA_INTEGER, 32,
+                                PropModeReplace, 0, NULL, FALSE);
+    if (rc != Success)
+        return;
+
+    XISetDevicePropertyDeletable(dev, prop_calibration, FALSE);
+
+    prop_swap = MakeAtom(EVDEV_PROP_SWAP_AXES,
+                         strlen(EVDEV_PROP_SWAP_AXES), TRUE);
+
+    rc = XIChangeDeviceProperty(dev, prop_swap, XA_INTEGER, 8,
+                                PropModeReplace, 1, &pEvdev->swap_axes, FALSE);
+    if (rc != Success)
+        return;
+
+    XISetDevicePropertyDeletable(dev, prop_swap, FALSE);
 }
 
 static int
@@ -1552,6 +1725,40 @@ EvdevSetProperty(DeviceIntPtr dev, Atom atom, XIPropertyValuePtr val,
 
         if (!checkonly)
             pEvdev->reopen_attempts = *((CARD8*)val->data);
+    } else if (atom == prop_calibration)
+    {
+        if (val->format != 32 || val->type != XA_INTEGER)
+            return BadMatch;
+        if (val->size != 4 && val->size != 0)
+            return BadMatch;
+
+        if (!checkonly)
+        {
+            if (val->size == 0)
+            {
+                pEvdev->flags &= ~EVDEV_CALIBRATED;
+                pEvdev->calibration.min_x = 0;
+                pEvdev->calibration.max_x = 0;
+                pEvdev->calibration.min_y = 0;
+                pEvdev->calibration.max_y = 0;
+            } else if (val->size == 4)
+            {
+                CARD32 *vals = (CARD32*)val->data;
+
+                pEvdev->flags |= EVDEV_CALIBRATED;
+                pEvdev->calibration.min_x = vals[0];
+                pEvdev->calibration.max_x = vals[1];
+                pEvdev->calibration.min_y = vals[2];
+                pEvdev->calibration.max_y = vals[3];
+            }
+        }
+    } else if (atom == prop_swap)
+    {
+        if (val->format != 8 || val->type != XA_INTEGER || val->size != 1)
+            return BadMatch;
+
+        if (!checkonly)
+            pEvdev->swap_axes = *((BOOL*)val->data);
     }
 
     return Success;

src/evdev.h

@@ -31,6 +31,7 @@
 #define EVDEV_H
 
 #include <linux/input.h>
+#include <linux/types.h>
 
 #include <xf86Xinput.h>
 #include <xf86_OSproc.h>
@@ -39,6 +40,22 @@
 #include <xkbstr.h>
 #endif
 
+#ifndef EV_CNT /* linux 2.4 kernels and earlier lack _CNT defines */
+#define EV_CNT (EV_MAX+1)
+#endif
+#ifndef KEY_CNT
+#define KEY_CNT (KEY_MAX+1)
+#endif
+#ifndef REL_CNT
+#define REL_CNT (REL_MAX+1)
+#endif
+#ifndef ABS_CNT
+#define ABS_CNT (ABS_MAX+1)
+#endif
+#ifndef LED_CNT
+#define LED_CNT (LED_MAX+1)
+#endif
+
 #define EVDEV_MAXBUTTONS 32
 
 #if GET_ABI_MAJOR(ABI_XINPUT_VERSION) >= 3
@@ -46,7 +63,9 @@
 #endif
 
 #define LONG_BITS (sizeof(long) * 8)
-#define NBITS(x) (((x) + LONG_BITS - 1) / LONG_BITS)
+
+/* Number of longs needed to hold the given number of bits */
+#define NLONGS(x) (((x) + LONG_BITS - 1) / LONG_BITS)
 
 /* axis specific data for wheel emulation */
 typedef struct {
@@ -64,6 +83,7 @@ typedef struct {
     int flags;
     int tool;
     int buttons;            /* number of buttons */
+    BOOL swap_axes;
     BOOL invert_x;
     BOOL invert_y;
 
@@ -102,6 +122,13 @@ typedef struct {
         Time                expires;     /* time of expiry */
         Time                timeout;
     } emulateWheel;
+    /* run-time calibration */
+    struct {
+        int                 min_x;
+        int                 max_x;
+        int                 min_y;
+        int                 max_y;
+    } calibration;
 
     unsigned char btnmap[32];           /* config-file specified button mapping */
 
@@ -111,15 +138,18 @@ typedef struct {
 
     /* Cached info from device. */
     char name[1024];
-    long bitmask[NBITS(EV_MAX)];
-    long key_bitmask[NBITS(KEY_MAX)];
-    long rel_bitmask[NBITS(REL_MAX)];
-    long abs_bitmask[NBITS(ABS_MAX)];
-    long led_bitmask[NBITS(LED_MAX)];
-    struct input_absinfo absinfo[ABS_MAX];
+    long bitmask[NLONGS(EV_CNT)];
+    long key_bitmask[NLONGS(KEY_CNT)];
+    long rel_bitmask[NLONGS(REL_CNT)];
+    long abs_bitmask[NLONGS(ABS_CNT)];
+    long led_bitmask[NLONGS(LED_CNT)];
+    struct input_absinfo absinfo[ABS_CNT];
+
+    /* minor/major number */
+    dev_t min_maj;
 } EvdevRec, *EvdevPtr;
 
-unsigned int EvdevUtilButtonEventToButtonNumber(int code);
+unsigned int EvdevUtilButtonEventToButtonNumber(EvdevPtr pEvdev, int code);
 
 /* Middle Button emulation */
 int  EvdevMBEmuTimer(InputInfoPtr);
@@ -127,6 +157,7 @@ BOOL EvdevMBEmuFilterEvent(InputInfoPtr, int, BOOL);
 void EvdevMBEmuWakeupHandler(pointer, int, pointer);
 void EvdevMBEmuBlockHandler(pointer, struct timeval**, pointer);
 void EvdevMBEmuPreInit(InputInfoPtr);
+void EvdevMBEmuOn(InputInfoPtr);
 void EvdevMBEmuFinalize(InputInfoPtr);
 void EvdevMBEmuEnable(InputInfoPtr, BOOL);