in tablet/aiptek.c [412:798]
static void aiptek_irq(struct urb *urb)
{
struct aiptek *aiptek = urb->context;
unsigned char *data = aiptek->data;
struct input_dev *inputdev = aiptek->inputdev;
struct usb_interface *intf = aiptek->intf;
int jitterable = 0;
int retval, macro, x, y, z, left, right, middle, p, dv, tip, bs, pck;
switch (urb->status) {
case 0:
/* Success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* This urb is terminated, clean up */
dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
__func__, urb->status);
return;
default:
dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
__func__, urb->status);
goto exit;
}
/* See if we are in a delay loop -- throw out report if true.
*/
if (aiptek->inDelay == 1 && time_after(aiptek->endDelay, jiffies)) {
goto exit;
}
aiptek->inDelay = 0;
aiptek->eventCount++;
/* Report 1 delivers relative coordinates with either a stylus
* or the mouse. You do not know, however, which input
* tool generated the event.
*/
if (data[0] == 1) {
if (aiptek->curSetting.coordinateMode ==
AIPTEK_COORDINATE_ABSOLUTE_MODE) {
aiptek->diagnostic =
AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE;
} else {
x = (signed char) data[2];
y = (signed char) data[3];
/* jitterable keeps track of whether any button has been pressed.
* We're also using it to remap the physical mouse button mask
* to pseudo-settings. (We don't specifically care about it's
* value after moving/transposing mouse button bitmasks, except
* that a non-zero value indicates that one or more
* mouse button was pressed.)
*/
jitterable = data[1] & 0x07;
left = (data[1] & aiptek->curSetting.mouseButtonLeft >> 2) != 0 ? 1 : 0;
right = (data[1] & aiptek->curSetting.mouseButtonRight >> 2) != 0 ? 1 : 0;
middle = (data[1] & aiptek->curSetting.mouseButtonMiddle >> 2) != 0 ? 1 : 0;
input_report_key(inputdev, BTN_LEFT, left);
input_report_key(inputdev, BTN_MIDDLE, middle);
input_report_key(inputdev, BTN_RIGHT, right);
input_report_abs(inputdev, ABS_MISC,
1 | AIPTEK_REPORT_TOOL_UNKNOWN);
input_report_rel(inputdev, REL_X, x);
input_report_rel(inputdev, REL_Y, y);
/* Wheel support is in the form of a single-event
* firing.
*/
if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
input_report_rel(inputdev, REL_WHEEL,
aiptek->curSetting.wheel);
aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
}
if (aiptek->lastMacro != -1) {
input_report_key(inputdev,
macroKeyEvents[aiptek->lastMacro], 0);
aiptek->lastMacro = -1;
}
input_sync(inputdev);
}
}
/* Report 2 is delivered only by the stylus, and delivers
* absolute coordinates.
*/
else if (data[0] == 2) {
if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
} else if (!AIPTEK_POINTER_ALLOW_STYLUS_MODE
(aiptek->curSetting.pointerMode)) {
aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
} else {
x = get_unaligned_le16(data + 1);
y = get_unaligned_le16(data + 3);
z = get_unaligned_le16(data + 6);
dv = (data[5] & 0x01) != 0 ? 1 : 0;
p = (data[5] & 0x02) != 0 ? 1 : 0;
tip = (data[5] & 0x04) != 0 ? 1 : 0;
/* Use jitterable to re-arrange button masks
*/
jitterable = data[5] & 0x18;
bs = (data[5] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
pck = (data[5] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
/* dv indicates 'data valid' (e.g., the tablet is in sync
* and has delivered a "correct" report) We will ignore
* all 'bad' reports...
*/
if (dv != 0) {
/* If the selected tool changed, reset the old
* tool key, and set the new one.
*/
if (aiptek->previousToolMode !=
aiptek->curSetting.toolMode) {
input_report_key(inputdev,
aiptek->previousToolMode, 0);
input_report_key(inputdev,
aiptek->curSetting.toolMode,
1);
aiptek->previousToolMode =
aiptek->curSetting.toolMode;
}
if (p != 0) {
input_report_abs(inputdev, ABS_X, x);
input_report_abs(inputdev, ABS_Y, y);
input_report_abs(inputdev, ABS_PRESSURE, z);
input_report_key(inputdev, BTN_TOUCH, tip);
input_report_key(inputdev, BTN_STYLUS, bs);
input_report_key(inputdev, BTN_STYLUS2, pck);
if (aiptek->curSetting.xTilt !=
AIPTEK_TILT_DISABLE) {
input_report_abs(inputdev,
ABS_TILT_X,
aiptek->curSetting.xTilt);
}
if (aiptek->curSetting.yTilt != AIPTEK_TILT_DISABLE) {
input_report_abs(inputdev,
ABS_TILT_Y,
aiptek->curSetting.yTilt);
}
/* Wheel support is in the form of a single-event
* firing.
*/
if (aiptek->curSetting.wheel !=
AIPTEK_WHEEL_DISABLE) {
input_report_abs(inputdev,
ABS_WHEEL,
aiptek->curSetting.wheel);
aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
}
}
input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_STYLUS);
if (aiptek->lastMacro != -1) {
input_report_key(inputdev,
macroKeyEvents[aiptek->lastMacro], 0);
aiptek->lastMacro = -1;
}
input_sync(inputdev);
}
}
}
/* Report 3's come from the mouse in absolute mode.
*/
else if (data[0] == 3) {
if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
} else if (!AIPTEK_POINTER_ALLOW_MOUSE_MODE
(aiptek->curSetting.pointerMode)) {
aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
} else {
x = get_unaligned_le16(data + 1);
y = get_unaligned_le16(data + 3);
jitterable = data[5] & 0x1c;
dv = (data[5] & 0x01) != 0 ? 1 : 0;
p = (data[5] & 0x02) != 0 ? 1 : 0;
left = (data[5] & aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
right = (data[5] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
middle = (data[5] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
if (dv != 0) {
/* If the selected tool changed, reset the old
* tool key, and set the new one.
*/
if (aiptek->previousToolMode !=
aiptek->curSetting.toolMode) {
input_report_key(inputdev,
aiptek->previousToolMode, 0);
input_report_key(inputdev,
aiptek->curSetting.toolMode,
1);
aiptek->previousToolMode =
aiptek->curSetting.toolMode;
}
if (p != 0) {
input_report_abs(inputdev, ABS_X, x);
input_report_abs(inputdev, ABS_Y, y);
input_report_key(inputdev, BTN_LEFT, left);
input_report_key(inputdev, BTN_MIDDLE, middle);
input_report_key(inputdev, BTN_RIGHT, right);
/* Wheel support is in the form of a single-event
* firing.
*/
if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
input_report_abs(inputdev,
ABS_WHEEL,
aiptek->curSetting.wheel);
aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
}
}
input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_MOUSE);
if (aiptek->lastMacro != -1) {
input_report_key(inputdev,
macroKeyEvents[aiptek->lastMacro], 0);
aiptek->lastMacro = -1;
}
input_sync(inputdev);
}
}
}
/* Report 4s come from the macro keys when pressed by stylus
*/
else if (data[0] == 4) {
jitterable = data[1] & 0x18;
dv = (data[1] & 0x01) != 0 ? 1 : 0;
p = (data[1] & 0x02) != 0 ? 1 : 0;
tip = (data[1] & 0x04) != 0 ? 1 : 0;
bs = (data[1] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
pck = (data[1] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
macro = dv && p && tip && !(data[3] & 1) ? (data[3] >> 1) : -1;
z = get_unaligned_le16(data + 4);
if (dv) {
/* If the selected tool changed, reset the old
* tool key, and set the new one.
*/
if (aiptek->previousToolMode !=
aiptek->curSetting.toolMode) {
input_report_key(inputdev,
aiptek->previousToolMode, 0);
input_report_key(inputdev,
aiptek->curSetting.toolMode,
1);
aiptek->previousToolMode =
aiptek->curSetting.toolMode;
}
}
if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
aiptek->lastMacro = -1;
}
if (macro != -1 && macro != aiptek->lastMacro) {
input_report_key(inputdev, macroKeyEvents[macro], 1);
aiptek->lastMacro = macro;
}
input_report_abs(inputdev, ABS_MISC,
p | AIPTEK_REPORT_TOOL_STYLUS);
input_sync(inputdev);
}
/* Report 5s come from the macro keys when pressed by mouse
*/
else if (data[0] == 5) {
jitterable = data[1] & 0x1c;
dv = (data[1] & 0x01) != 0 ? 1 : 0;
p = (data[1] & 0x02) != 0 ? 1 : 0;
left = (data[1]& aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
right = (data[1] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
middle = (data[1] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
macro = dv && p && left && !(data[3] & 1) ? (data[3] >> 1) : 0;
if (dv) {
/* If the selected tool changed, reset the old
* tool key, and set the new one.
*/
if (aiptek->previousToolMode !=
aiptek->curSetting.toolMode) {
input_report_key(inputdev,
aiptek->previousToolMode, 0);
input_report_key(inputdev,
aiptek->curSetting.toolMode, 1);
aiptek->previousToolMode = aiptek->curSetting.toolMode;
}
}
if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
aiptek->lastMacro = -1;
}
if (macro != -1 && macro != aiptek->lastMacro) {
input_report_key(inputdev, macroKeyEvents[macro], 1);
aiptek->lastMacro = macro;
}
input_report_abs(inputdev, ABS_MISC,
p | AIPTEK_REPORT_TOOL_MOUSE);
input_sync(inputdev);
}
/* We have no idea which tool can generate a report 6. Theoretically,
* neither need to, having been given reports 4 & 5 for such use.
* However, report 6 is the 'official-looking' report for macroKeys;
* reports 4 & 5 supposively are used to support unnamed, unknown
* hat switches (which just so happen to be the macroKeys.)
*/
else if (data[0] == 6) {
macro = get_unaligned_le16(data + 1);
if (macro > 0) {
input_report_key(inputdev, macroKeyEvents[macro - 1],
0);
}
if (macro < 25) {
input_report_key(inputdev, macroKeyEvents[macro + 1],
0);
}
/* If the selected tool changed, reset the old
tool key, and set the new one.
*/
if (aiptek->previousToolMode !=
aiptek->curSetting.toolMode) {
input_report_key(inputdev,
aiptek->previousToolMode, 0);
input_report_key(inputdev,
aiptek->curSetting.toolMode,
1);
aiptek->previousToolMode =
aiptek->curSetting.toolMode;
}
input_report_key(inputdev, macroKeyEvents[macro], 1);
input_report_abs(inputdev, ABS_MISC,
1 | AIPTEK_REPORT_TOOL_UNKNOWN);
input_sync(inputdev);
} else {
dev_dbg(&intf->dev, "Unknown report %d\n", data[0]);
}
/* Jitter may occur when the user presses a button on the stlyus
* or the mouse. What we do to prevent that is wait 'x' milliseconds
* following a 'jitterable' event, which should give the hand some time
* stabilize itself.
*
* We just introduced aiptek->previousJitterable to carry forth the
* notion that jitter occurs when the button state changes from on to off:
* a person drawing, holding a button down is not subject to jittering.
* With that in mind, changing from upper button depressed to lower button
* WILL transition through a jitter delay.
*/
if (aiptek->previousJitterable != jitterable &&
aiptek->curSetting.jitterDelay != 0 && aiptek->inDelay != 1) {
aiptek->endDelay = jiffies +
((aiptek->curSetting.jitterDelay * HZ) / 1000);
aiptek->inDelay = 1;
}
aiptek->previousJitterable = jitterable;
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval != 0) {
dev_err(&intf->dev,
"%s - usb_submit_urb failed with result %d\n",
__func__, retval);
}
}