evdev 2.3.2

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

configure.ac

@@ -22,7 +22,7 @@
 
 AC_PREREQ(2.57)
 AC_INIT([xf86-input-evdev],
-        2.2.99.2,
+        2.3.2,
         [https://bugs.freedesktop.org/enter_bug.cgi?product=xorg],
         xf86-input-evdev)
 

man/evdev.man

@@ -138,18 +138,31 @@ Invert the given axis. Default: off. Property: "Evdev Axis Inversion".
 .BI "Option \*qIgnoreRelativeAxes\*q \*q" Bool \*q
 .TP 7
 .BI "Option \*qIgnoreAbsoluteAxes\*q \*q" Bool \*q
-Ignore the specified type of axis. Default: off. The X server cannot deal
+Ignore the specified type of axis. Default: unset. The X server cannot deal
 with devices that have both relative and absolute axes. Evdev tries to guess
 wich axes to ignore given the device type and disables absolute axes for
 mice and relative axes for tablets, touchscreens and touchpad. These options
 allow to forcibly disable an axis type. Mouse wheel axes are exempt and will
 work even if relative axes are ignored. No property, this configuration must
 be set in the configuration.
+.br
+If either option is set to False, the driver will not ignore the specified
+axes regardless of the presence of other axes. This may trigger buggy
+behavior and events from this axis are always forwarded. Users are
+discouraged from setting this option.
 .TP 7
 .BI "Option \*qReopenAttempts\*q \*q" integer \*q
 Number of reopen attempts after a read error occurs on the device (e.g. after
 waking up from suspend). In between each attempt is a 100ms wait. Default: 10.
 .TP 7
+.BI "Option \*qCalibration\*q \*q" "min-x max-x min-y max-y" \*q
+Calibrates the X and Y axes for devices that need to scale to a different
+coordinate system than reported to the X server. This feature is required
+for devices that need to scale to a different coordinate system than
+originally reported by the kernel (e.g. touchscreens). The scaling to the
+custom coordinate system is done in-driver and the X server is unaware of
+the transformation. Property: "Evdev Axis Calibration".
+.TP 7
 .BI "Option \*qSwapAxes\*q \*q" Bool \*q
 Swap x/y axes. Default: off. Property: "Evdev Axes Swap".
 .TP 7
@@ -178,9 +191,7 @@ driver.
 .TP 7
 .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.
+in-driver axis calibration.
 .TP 7
 .BI "Evdev Axis Inversion"
 2 boolean values (8 bit, 0 or 1), order X, Y. 1 inverts the axis.

src/draglock.c

@@ -256,7 +256,7 @@ EvdevDragLockSetProperty(DeviceIntPtr dev, Atom atom, XIPropertyValuePtr val,
                 pEvdev->dragLock.meta = meta;
                 memset(pEvdev->dragLock.lock_pair, 0, sizeof(pEvdev->dragLock.lock_pair));
             }
-        } else
+        } else if ((val->size % 2) == 0)
         {
             CARD8* vals = (CARD8*)val->data;
 
@@ -269,10 +269,11 @@ EvdevDragLockSetProperty(DeviceIntPtr dev, Atom atom, XIPropertyValuePtr val,
                 pEvdev->dragLock.meta = 0;
                 memset(pEvdev->dragLock.lock_pair, 0, sizeof(pEvdev->dragLock.lock_pair));
 
-                for (i = 0; i < val->size && i < EVDEV_MAXBUTTONS; i++)
-                    pEvdev->dragLock.lock_pair[i] = vals[i];
+                for (i = 0; i < val->size && i < EVDEV_MAXBUTTONS; i += 2)
+                    pEvdev->dragLock.lock_pair[vals[i] - 1] = vals[i + 1];
             }
-        }
+        } else
+            return BadMatch;
     }
 
     return Success;

src/evdev.c

@@ -89,7 +89,9 @@
 #define EVDEV_INITIALIZED	(1 << 5) /* WheelInit etc. called already? */
 #define EVDEV_TOUCHSCREEN	(1 << 6)
 #define EVDEV_CALIBRATED	(1 << 7) /* run-time calibrated? */
-#define EVDEV_TABLET		(1 << 8) /* run-time calibrated? */
+#define EVDEV_TABLET		(1 << 8) /* device looks like a tablet? */
+#define EVDEV_UNIGNORE_ABSOLUTE (1 << 9) /* explicitly unignore abs axes */
+#define EVDEV_UNIGNORE_RELATIVE (1 << 10) /* explicitly unignore rel axes */
 
 #define MIN_KEYCODE 8
 #define GLYPHS_PER_KEY 2
@@ -438,7 +440,7 @@ EvdevProcessValuators(InputInfoPtr pInfo, int v[MAX_VALUATORS], int *num_v,
         for (i = 0; i < REL_CNT; i++)
         {
             int map = pEvdev->axis_map[i];
-            if (pEvdev->delta[i] && map != -1)
+            if (map != -1)
             {
                 v[map] = pEvdev->delta[i];
                 if (map < first)
@@ -462,6 +464,13 @@ EvdevProcessValuators(InputInfoPtr pInfo, int v[MAX_VALUATORS], int *num_v,
      */
     else if (pEvdev->abs && pEvdev->tool) {
         memcpy(v, pEvdev->vals, sizeof(int) * pEvdev->num_vals);
+
+        if (pEvdev->swap_axes) {
+            int tmp = v[0];
+            v[0] = v[1];
+            v[1] = tmp;
+        }
+
         if (pEvdev->flags & EVDEV_CALIBRATED)
         {
             v[0] = xf86ScaleAxis(v[0],
@@ -474,12 +483,6 @@ EvdevProcessValuators(InputInfoPtr pInfo, int v[MAX_VALUATORS], int *num_v,
                     pEvdev->calibration.max_y, pEvdev->calibration.min_y);
         }
 
-        if (pEvdev->swap_axes) {
-            int tmp = v[0];
-            v[0] = v[1];
-            v[1] = tmp;
-        }
-
         if (pEvdev->invert_x)
             v[0] = (pEvdev->absinfo[ABS_X].maximum - v[0] +
                     pEvdev->absinfo[ABS_X].minimum);
@@ -614,7 +617,6 @@ EvdevProcessKeyEvent(InputInfoPtr pInfo, struct input_event *ev)
             return;
 
     switch (ev->code) {
-        case BTN_TOUCH:
         case BTN_TOOL_PEN:
         case BTN_TOOL_RUBBER:
         case BTN_TOOL_BRUSH:
@@ -624,7 +626,11 @@ EvdevProcessKeyEvent(InputInfoPtr pInfo, struct input_event *ev)
         case BTN_TOOL_MOUSE:
         case BTN_TOOL_LENS:
             pEvdev->tool = value ? ev->code : 0;
-            if (!(pEvdev->flags & EVDEV_TOUCHSCREEN))
+            break;
+
+        case BTN_TOUCH:
+            pEvdev->tool = value ? ev->code : 0;
+            if (!(pEvdev->flags & (EVDEV_TOUCHSCREEN | EVDEV_TABLET)))
                 break;
             /* Treat BTN_TOUCH from devices that only have BTN_TOUCH as
              * BTN_LEFT. */
@@ -768,6 +774,7 @@ EvdevReadInput(InputInfoPtr pInfo)
         {
             if (errno == ENODEV) /* May happen after resume */
             {
+                EvdevMBEmuFinalize(pInfo);
                 xf86RemoveEnabledDevice(pInfo);
                 close(pInfo->fd);
                 pInfo->fd = -1;
@@ -1421,6 +1428,17 @@ EvdevInitButtonMapping(InputInfoPtr pInfo)
 
 }
 
+static void
+EvdevInitAnyClass(DeviceIntPtr device, EvdevPtr pEvdev)
+{
+    if (pEvdev->flags & EVDEV_RELATIVE_EVENTS &&
+        EvdevAddRelClass(device) == Success)
+        xf86Msg(X_INFO, "%s: initialized for relative axes.\n", device->name);
+    if (pEvdev->flags & EVDEV_ABSOLUTE_EVENTS &&
+        EvdevAddAbsClass(device) == Success)
+        xf86Msg(X_INFO, "%s: initialized for absolute axes.\n", device->name);
+}
+
 static void
 EvdevInitAbsClass(DeviceIntPtr device, EvdevPtr pEvdev)
 {
@@ -1512,7 +1530,9 @@ EvdevInit(DeviceIntPtr device)
      * used and relative axes are ignored.
      */
 
-    if (pEvdev->flags & (EVDEV_TOUCHPAD | EVDEV_TOUCHSCREEN | EVDEV_TABLET))
+    if (pEvdev->flags & (EVDEV_UNIGNORE_RELATIVE | EVDEV_UNIGNORE_ABSOLUTE))
+        EvdevInitAnyClass(device, pEvdev);
+    else if (pEvdev->flags & (EVDEV_TOUCHPAD | EVDEV_TOUCHSCREEN | EVDEV_TABLET))
         EvdevInitTouchDevice(device, pEvdev);
     else if (pEvdev->flags & EVDEV_RELATIVE_EVENTS)
         EvdevInitRelClass(device, pEvdev);
@@ -1655,6 +1675,7 @@ static int
 EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
 {
     EvdevPtr pEvdev = pInfo->private;
+    size_t len;
     int i;
 
     char name[1024]                  = {0};
@@ -1663,107 +1684,122 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
     unsigned long rel_bitmask[NLONGS(REL_CNT)] = {0};
     unsigned long abs_bitmask[NLONGS(ABS_CNT)] = {0};
     unsigned long led_bitmask[NLONGS(LED_CNT)] = {0};
-    struct input_absinfo absinfo[ABS_CNT];
 
-    if (ioctl(pInfo->fd,
-              EVIOCGNAME(sizeof(name) - 1), name) < 0) {
+    if (ioctl(pInfo->fd, EVIOCGNAME(sizeof(name) - 1), name) < 0) {
         xf86Msg(X_ERROR, "ioctl EVIOCGNAME failed: %s\n", strerror(errno));
         goto error;
     }
 
-    if (compare && strcmp(pEvdev->name, name)) {
-        xf86Msg(X_ERROR, "%s: device name changed: %s != %s\n", pInfo->name, pEvdev->name, name);
+    if (!compare) {
+        strcpy(pEvdev->name, name);
+    } else if (strcmp(pEvdev->name, name)) {
+        xf86Msg(X_ERROR, "%s: device name changed: %s != %s\n",
+                pInfo->name, pEvdev->name, name);
         goto error;
     }
 
-    if (ioctl(pInfo->fd,
-              EVIOCGBIT(0, sizeof(bitmask)), bitmask) < 0) {
-        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n", pInfo->name, strerror(errno));
+    len = ioctl(pInfo->fd, EVIOCGBIT(0, sizeof(bitmask)), bitmask);
+    if (len < 0) {
+        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n",
+                pInfo->name, strerror(errno));
         goto error;
     }
 
-    if (compare && memcmp(pEvdev->bitmask, bitmask, sizeof(bitmask))) {
+    if (!compare) {
+        memcpy(pEvdev->bitmask, bitmask, len);
+    } else if (memcmp(pEvdev->bitmask, bitmask, len)) {
         xf86Msg(X_ERROR, "%s: device bitmask has changed\n", pInfo->name);
         goto error;
     }
 
-
-    if (ioctl(pInfo->fd,
-              EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask) < 0) {
-        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n", pInfo->name, strerror(errno));
+    len = ioctl(pInfo->fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask);
+    if (len < 0) {
+        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n",
+                pInfo->name, strerror(errno));
         goto error;
     }
 
-    if (compare && memcmp(pEvdev->rel_bitmask, rel_bitmask, sizeof(rel_bitmask))) {
+    if (!compare) {
+        memcpy(pEvdev->rel_bitmask, rel_bitmask, len);
+    } else if (memcmp(pEvdev->rel_bitmask, rel_bitmask, len)) {
         xf86Msg(X_ERROR, "%s: device rel_bitmask has changed\n", pInfo->name);
         goto error;
     }
 
-    if (ioctl(pInfo->fd,
-              EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask) < 0) {
-        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n", pInfo->name, strerror(errno));
+    len = ioctl(pInfo->fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask);
+    if (len < 0) {
+        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n",
+                pInfo->name, strerror(errno));
         goto error;
     }
 
-    if (compare && memcmp(pEvdev->abs_bitmask, abs_bitmask, sizeof(abs_bitmask))) {
+    if (!compare) {
+        memcpy(pEvdev->abs_bitmask, abs_bitmask, len);
+    } else if (memcmp(pEvdev->abs_bitmask, abs_bitmask, len)) {
         xf86Msg(X_ERROR, "%s: device abs_bitmask has changed\n", pInfo->name);
         goto error;
     }
 
-    if (ioctl(pInfo->fd,
-              EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask) < 0) {
-        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n", pInfo->name, strerror(errno));
+    len = ioctl(pInfo->fd, EVIOCGBIT(EV_LED, sizeof(led_bitmask)), led_bitmask);
+    if (len < 0) {
+        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n",
+                pInfo->name, strerror(errno));
         goto error;
     }
 
-    if (compare && memcmp(pEvdev->key_bitmask, key_bitmask, sizeof(key_bitmask))) {
-        xf86Msg(X_ERROR, "%s: device key_bitmask has changed\n", pInfo->name);
-        goto error;
-    }
-
-    if (ioctl(pInfo->fd,
-              EVIOCGBIT(EV_LED, sizeof(led_bitmask)), led_bitmask) < 0) {
-        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n", pInfo->name, strerror(errno));
-        goto error;
-    }
-
-    if (compare && memcmp(pEvdev->led_bitmask, led_bitmask, sizeof(led_bitmask))) {
+    if (!compare) {
+        memcpy(pEvdev->led_bitmask, led_bitmask, len);
+    } else if (memcmp(pEvdev->led_bitmask, led_bitmask, len)) {
         xf86Msg(X_ERROR, "%s: device led_bitmask has changed\n", pInfo->name);
         goto error;
     }
 
-    memset(absinfo, 0, sizeof(absinfo));
-
-    for (i = ABS_X; i <= ABS_MAX; i++)
-    {
-        if (TestBit(i, abs_bitmask))
-        {
-            if (ioctl(pInfo->fd, EVIOCGABS(i), &absinfo[i]) < 0) {
-                xf86Msg(X_ERROR, "%s: ioctl EVIOCGABS failed: %s\n", pInfo->name, strerror(errno));
+    /*
+     * Do not try to validate absinfo data since it is not expected
+     * to be static, always refresh it in evdev structure.
+     */
+    for (i = ABS_X; i <= ABS_MAX; i++) {
+        if (TestBit(i, abs_bitmask)) {
+            len = ioctl(pInfo->fd, EVIOCGABS(i), &pEvdev->absinfo[i]);
+            if (len < 0) {
+                xf86Msg(X_ERROR, "%s: ioctl EVIOCGABSi(%d) failed: %s\n",
+                        pInfo->name, i, strerror(errno));
                 goto error;
             }
-            /* ignore current position (value) in comparison (bug #19819) */
-            absinfo[i].value = pEvdev->absinfo[i].value;
         }
     }
 
-    if (compare && memcmp(pEvdev->absinfo, absinfo, sizeof(absinfo))) {
-        xf86Msg(X_ERROR, "%s: device absinfo has changed\n", pInfo->name);
+    len = ioctl(pInfo->fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask);
+    if (len < 0) {
+        xf86Msg(X_ERROR, "%s: ioctl EVIOCGBIT failed: %s\n",
+                pInfo->name, strerror(errno));
         goto error;
     }
 
-    /* cache info */
-    if (!compare)
-    {
-        strcpy(pEvdev->name, name);
-        memcpy(pEvdev->bitmask, bitmask, sizeof(bitmask));
-        memcpy(pEvdev->key_bitmask, key_bitmask, sizeof(key_bitmask));
-        memcpy(pEvdev->rel_bitmask, rel_bitmask, sizeof(rel_bitmask));
-        memcpy(pEvdev->abs_bitmask, abs_bitmask, sizeof(abs_bitmask));
-        memcpy(pEvdev->led_bitmask, led_bitmask, sizeof(led_bitmask));
-        memcpy(pEvdev->absinfo, absinfo, sizeof(absinfo));
+    if (compare) {
+        /*
+         * Keys are special as user can adjust keymap at any time (on
+         * devices that support EVIOCSKEYCODE. However we do not expect
+         * buttons reserved for mice/tablets/digitizers and so on to
+         * appear/disappear so we will check only those in
+         * [BTN_MISC, KEY_OK) range.
+         */
+        size_t start_word = BTN_MISC / LONG_BITS;
+        size_t start_byte = start_word * sizeof(unsigned long);
+        size_t end_word = KEY_OK / LONG_BITS;
+        size_t end_byte = end_word * sizeof(unsigned long);
+
+        if (len >= start_byte &&
+            memcmp(&pEvdev->key_bitmask[start_word], &key_bitmask[start_word],
+                   min(len, end_byte) - start_byte + 1)) {
+            xf86Msg(X_ERROR, "%s: device key_bitmask has changed\n", pInfo->name);
+            goto error;
+        }
     }
 
+    /* Copy the data so we have reasonably up-to-date info */
+    memcpy(pEvdev->key_bitmask, key_bitmask, len);
+
     return Success;
 
 error:
@@ -1776,7 +1812,7 @@ EvdevProbe(InputInfoPtr pInfo)
 {
     int i, has_rel_axes, has_abs_axes, has_keys, num_buttons, has_scroll;
     int kernel24 = 0;
-    int ignore_rel, ignore_abs;
+    int ignore_abs = 0, ignore_rel = 0;
     EvdevPtr pEvdev = pInfo->private;
 
     if (pEvdev->grabDevice && ioctl(pInfo->fd, EVIOCGRAB, (void *)1)) {
@@ -1792,8 +1828,26 @@ EvdevProbe(InputInfoPtr pInfo)
         ioctl(pInfo->fd, EVIOCGRAB, (void *)0);
     }
 
-    ignore_rel = xf86SetBoolOption(pInfo->options, "IgnoreRelativeAxes", FALSE);
-    ignore_abs = xf86SetBoolOption(pInfo->options, "IgnoreAbsoluteAxes", FALSE);
+    /* Trinary state for ignoring axes:
+       - unset: do the normal thing.
+       - TRUE: explicitly ignore them.
+       - FALSE: unignore axes, use them at all cost if they're present.
+     */
+    if (xf86FindOption(pInfo->options, "IgnoreRelativeAxes"))
+    {
+        if (xf86SetBoolOption(pInfo->options, "IgnoreRelativeAxes", FALSE))
+            ignore_rel = TRUE;
+        else
+            pEvdev->flags |= EVDEV_UNIGNORE_RELATIVE;
+
+    }
+    if (xf86FindOption(pInfo->options, "IgnoreAbsoluteAxes"))
+    {
+        if (xf86SetBoolOption(pInfo->options, "IgnoreAbsoluteAxes", FALSE))
+           ignore_abs = TRUE;
+        else
+            pEvdev->flags |= EVDEV_UNIGNORE_ABSOLUTE;
+    }
 
     has_rel_axes = FALSE;
     has_abs_axes = FALSE;
@@ -1843,7 +1897,7 @@ EvdevProbe(InputInfoPtr pInfo)
 
         if (!ignore_rel)
         {
-            xf86Msg(X_INFO, "%s: found relative axes\n", pInfo->name);
+            xf86Msg(X_INFO, "%s: Found relative axes\n", pInfo->name);
             pEvdev->flags |= EVDEV_RELATIVE_EVENTS;
 
             if (TestBit(REL_X, pEvdev->rel_bitmask) &&
@@ -1851,7 +1905,7 @@ EvdevProbe(InputInfoPtr pInfo)
                 xf86Msg(X_INFO, "%s: Found x and y relative axes\n", pInfo->name);
             }
         } else {
-            xf86Msg(X_INFO, "%s: relative axes present but ignored.\n", pInfo->name);
+            xf86Msg(X_INFO, "%s: Relative axes present but ignored.\n", pInfo->name);
             has_rel_axes = FALSE;
         }
     }
@@ -1865,10 +1919,10 @@ EvdevProbe(InputInfoPtr pInfo)
 
     if (ignore_abs && has_abs_axes)
     {
-        xf86Msg(X_INFO, "%s: absolute axes present but ignored.\n", pInfo->name);
+        xf86Msg(X_INFO, "%s: Absolute axes present but ignored.\n", pInfo->name);
         has_abs_axes = FALSE;
     } else if (has_abs_axes) {
-        xf86Msg(X_INFO, "%s: found absolute axes\n", pInfo->name);
+        xf86Msg(X_INFO, "%s: Found absolute axes\n", pInfo->name);
         pEvdev->flags |= EVDEV_ABSOLUTE_EVENTS;
 
         if ((TestBit(ABS_X, pEvdev->abs_bitmask) &&
@@ -1878,6 +1932,11 @@ EvdevProbe(InputInfoPtr pInfo)
             {
                 xf86Msg(X_INFO, "%s: Found absolute tablet.\n", pInfo->name);
                 pEvdev->flags |= EVDEV_TABLET;
+                if (!pEvdev->num_buttons)
+                {
+                    pEvdev->num_buttons = 7; /* LMR + scroll wheels */
+                    pEvdev->flags |= EVDEV_BUTTON_EVENTS;
+                }
             } else if (TestBit(ABS_PRESSURE, pEvdev->abs_bitmask) ||
                 TestBit(BTN_TOUCH, pEvdev->key_bitmask)) {
                 if (num_buttons || TestBit(BTN_TOOL_FINGER, pEvdev->key_bitmask)) {
@@ -1949,12 +2008,32 @@ EvdevProbe(InputInfoPtr pInfo)
     return 0;
 }
 
+static void
+EvdevSetCalibration(InputInfoPtr pInfo, int num_calibration, int calibration[4])
+{
+    EvdevPtr pEvdev = pInfo->private;
+
+    if (num_calibration == 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 (num_calibration == 4) {
+        pEvdev->flags |= EVDEV_CALIBRATED;
+        pEvdev->calibration.min_x = calibration[0];
+        pEvdev->calibration.max_x = calibration[1];
+        pEvdev->calibration.min_y = calibration[2];
+        pEvdev->calibration.max_y = calibration[3];
+    }
+}
 
 static InputInfoPtr
 EvdevPreInit(InputDriverPtr drv, IDevPtr dev, int flags)
 {
     InputInfoPtr pInfo;
-    const char *device;
+    const char *device, *str;
+    int num_calibration = 0, calibration[4] = { 0, 0, 0, 0 };
     EvdevPtr pEvdev;
 
     if (!(pInfo = xf86AllocateInput(drv, 0)))
@@ -2027,6 +2106,19 @@ EvdevPreInit(InputDriverPtr drv, IDevPtr dev, int flags)
     pEvdev->invert_y = xf86SetBoolOption(pInfo->options, "InvertY", FALSE);
     pEvdev->swap_axes = xf86SetBoolOption(pInfo->options, "SwapAxes", FALSE);
 
+    str = xf86CheckStrOption(pInfo->options, "Calibration", NULL);
+    if (str) {
+        num_calibration = sscanf(str, "%d %d %d %d",
+                                 &calibration[0], &calibration[1],
+                                 &calibration[2], &calibration[3]);
+        if (num_calibration == 4)
+            EvdevSetCalibration(pInfo, num_calibration, calibration);
+        else
+            xf86Msg(X_ERROR,
+                    "%s: Insufficient calibration factors (%d). Ignoring calibration\n",
+                    pInfo->name, num_calibration);
+    }
+
     /* Grabbing the event device stops in-kernel event forwarding. In other
        words, it disables rfkill and the "Macintosh mouse button emulation".
        Note that this needs a server that sets the console to RAW mode. */
@@ -2318,16 +2410,16 @@ static void EvdevInitAxesLabels(EvdevPtr pEvdev, int natoms, Atom *atoms)
     int labels_len = 0;
     char *misc_label;
 
-    if (pEvdev->flags & EVDEV_RELATIVE_EVENTS)
-    {
-        labels     = rel_labels;
-        labels_len = ArrayLength(rel_labels);
-        misc_label = AXIS_LABEL_PROP_REL_MISC;
-    } else if ((pEvdev->flags & EVDEV_ABSOLUTE_EVENTS))
+    if (pEvdev->flags & EVDEV_ABSOLUTE_EVENTS)
     {
         labels     = abs_labels;
         labels_len = ArrayLength(abs_labels);
         misc_label = AXIS_LABEL_PROP_ABS_MISC;
+    } else if ((pEvdev->flags & EVDEV_RELATIVE_EVENTS))
+    {
+        labels     = rel_labels;
+        labels_len = ArrayLength(rel_labels);
+        misc_label = AXIS_LABEL_PROP_REL_MISC;
     }
 
     memset(atoms, 0, natoms * sizeof(Atom));
@@ -2427,8 +2519,22 @@ EvdevInitProperty(DeviceIntPtr dev)
 
         prop_calibration = MakeAtom(EVDEV_PROP_CALIBRATION,
                 strlen(EVDEV_PROP_CALIBRATION), TRUE);
-        rc = XIChangeDeviceProperty(dev, prop_calibration, XA_INTEGER, 32,
-                PropModeReplace, 0, NULL, FALSE);
+        if (pEvdev->flags & EVDEV_CALIBRATED) {
+            int calibration[4];
+
+            calibration[0] = pEvdev->calibration.min_x;
+            calibration[1] = pEvdev->calibration.max_x;
+            calibration[2] = pEvdev->calibration.min_y;
+            calibration[3] = pEvdev->calibration.max_y;
+
+            rc = XIChangeDeviceProperty(dev, prop_calibration, XA_INTEGER,
+                    32, PropModeReplace, 4, calibration,
+                    FALSE);
+        } else if (pEvdev->flags & EVDEV_ABSOLUTE_EVENTS) {
+            rc = XIChangeDeviceProperty(dev, prop_calibration, XA_INTEGER,
+                    32, PropModeReplace, 0, NULL,
+                    FALSE);
+        }
         if (rc != Success)
             return;
 
@@ -2502,25 +2608,7 @@ EvdevSetProperty(DeviceIntPtr dev, Atom atom, XIPropertyValuePtr val,
             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];
-            }
-        }
+            EvdevSetCalibration(pInfo, val->size, val->data);
     } else if (atom == prop_swap)
     {
         if (val->format != 8 || val->type != XA_INTEGER || val->size != 1)