aiptek.c

linux 内核源代码

		*/
		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 {
		dbg("Unknown report %d", 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) {
		err("%s - usb_submit_urb failed with result %d",
		    __FUNCTION__, retval);
	}
}

/***********************************************************************
 * These are the USB id's known so far. We do not identify them to
 * specific Aiptek model numbers, because there has been overlaps,
 * use, and reuse of id's in existing models. Certain models have
 * been known to use more than one ID, indicative perhaps of
 * manufacturing revisions. In any event, we consider these
 * IDs to not be model-specific nor unique.
 */
static const struct usb_device_id aiptek_ids[] = {
	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x01)},
	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x10)},
	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x20)},
	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x21)},
	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x22)},
	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x23)},
	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x24)},
	{}
};

MODULE_DEVICE_TABLE(usb, aiptek_ids);

/***********************************************************************
 * Open an instance of the tablet driver.
 */
static int aiptek_open(struct input_dev *inputdev)
{
	struct aiptek *aiptek = input_get_drvdata(inputdev);

	aiptek->urb->dev = aiptek->usbdev;
	if (usb_submit_urb(aiptek->urb, GFP_KERNEL) != 0)
		return -EIO;

	return 0;
}

/***********************************************************************
 * Close an instance of the tablet driver.
 */
static void aiptek_close(struct input_dev *inputdev)
{
	struct aiptek *aiptek = input_get_drvdata(inputdev);

	usb_kill_urb(aiptek->urb);
}

/***********************************************************************
 * aiptek_set_report and aiptek_get_report() are borrowed from Linux 2.4.x,
 * where they were known as usb_set_report and usb_get_report.
 */
static int
aiptek_set_report(struct aiptek *aiptek,
		  unsigned char report_type,
		  unsigned char report_id, void *buffer, int size)
{
	return usb_control_msg(aiptek->usbdev,
			       usb_sndctrlpipe(aiptek->usbdev, 0),
			       USB_REQ_SET_REPORT,
			       USB_TYPE_CLASS | USB_RECIP_INTERFACE |
			       USB_DIR_OUT, (report_type << 8) + report_id,
			       aiptek->ifnum, buffer, size, 5000);
}

static int
aiptek_get_report(struct aiptek *aiptek,
		  unsigned char report_type,
		  unsigned char report_id, void *buffer, int size)
{
	return usb_control_msg(aiptek->usbdev,
			       usb_rcvctrlpipe(aiptek->usbdev, 0),
			       USB_REQ_GET_REPORT,
			       USB_TYPE_CLASS | USB_RECIP_INTERFACE |
			       USB_DIR_IN, (report_type << 8) + report_id,
			       aiptek->ifnum, buffer, size, 5000);
}

/***********************************************************************
 * Send a command to the tablet.
 */
static int
aiptek_command(struct aiptek *aiptek, unsigned char command, unsigned char data)
{
	const int sizeof_buf = 3 * sizeof(u8);
	int ret;
	u8 *buf;

	buf = kmalloc(sizeof_buf, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	buf[0] = 2;
	buf[1] = command;
	buf[2] = data;

	if ((ret =
	     aiptek_set_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
		dbg("aiptek_program: failed, tried to send: 0x%02x 0x%02x",
		    command, data);
	}
	kfree(buf);
	return ret < 0 ? ret : 0;
}

/***********************************************************************
 * Retrieve information from the tablet. Querying info is defined as first
 * sending the {command,data} sequence as a command, followed by a wait
 * (aka, "programmaticDelay") and then a "read" request.
 */
static int
aiptek_query(struct aiptek *aiptek, unsigned char command, unsigned char data)
{
	const int sizeof_buf = 3 * sizeof(u8);
	int ret;
	u8 *buf;

	buf = kmalloc(sizeof_buf, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	buf[0] = 2;
	buf[1] = command;
	buf[2] = data;

	if (aiptek_command(aiptek, command, data) != 0) {
		kfree(buf);
		return -EIO;
	}
	msleep(aiptek->curSetting.programmableDelay);

	if ((ret =
	     aiptek_get_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
		dbg("aiptek_query failed: returned 0x%02x 0x%02x 0x%02x",
		    buf[0], buf[1], buf[2]);
		ret = -EIO;
	} else {
		ret = le16_to_cpu(get_unaligned((__le16 *) (buf + 1)));
	}
	kfree(buf);
	return ret;
}

/***********************************************************************
 * Program the tablet into either absolute or relative mode.
 * We also get information about the tablet's size.
 */
static int aiptek_program_tablet(struct aiptek *aiptek)
{
	int ret;
	/* Execute Resolution500LPI */
	if ((ret = aiptek_command(aiptek, 0x18, 0x04)) < 0)
		return ret;

	/* Query getModelCode */
	if ((ret = aiptek_query(aiptek, 0x02, 0x00)) < 0)
		return ret;
	aiptek->features.modelCode = ret & 0xff;

	/* Query getODMCode */
	if ((ret = aiptek_query(aiptek, 0x03, 0x00)) < 0)
		return ret;
	aiptek->features.odmCode = ret;

	/* Query getFirmwareCode */
	if ((ret = aiptek_query(aiptek, 0x04, 0x00)) < 0)
		return ret;
	aiptek->features.firmwareCode = ret;

	/* Query getXextension */
	if ((ret = aiptek_query(aiptek, 0x01, 0x00)) < 0)
		return ret;
	aiptek->inputdev->absmin[ABS_X] = 0;
	aiptek->inputdev->absmax[ABS_X] = ret - 1;

	/* Query getYextension */
	if ((ret = aiptek_query(aiptek, 0x01, 0x01)) < 0)
		return ret;
	aiptek->inputdev->absmin[ABS_Y] = 0;
	aiptek->inputdev->absmax[ABS_Y] = ret - 1;

	/* Query getPressureLevels */
	if ((ret = aiptek_query(aiptek, 0x08, 0x00)) < 0)
		return ret;
	aiptek->inputdev->absmin[ABS_PRESSURE] = 0;
	aiptek->inputdev->absmax[ABS_PRESSURE] = ret - 1;

	/* Depending on whether we are in absolute or relative mode, we will
	 * do a switchToTablet(absolute) or switchToMouse(relative) command.
	 */
	if (aiptek->curSetting.coordinateMode ==
	    AIPTEK_COORDINATE_ABSOLUTE_MODE) {
		/* Execute switchToTablet */
		if ((ret = aiptek_command(aiptek, 0x10, 0x01)) < 0) {
			return ret;
		}
	} else {
		/* Execute switchToMouse */
		if ((ret = aiptek_command(aiptek, 0x10, 0x00)) < 0) {
			return ret;
		}
	}

	/* Enable the macro keys */
	if ((ret = aiptek_command(aiptek, 0x11, 0x02)) < 0)
		return ret;
#if 0
	/* Execute FilterOn */
	if ((ret = aiptek_command(aiptek, 0x17, 0x00)) < 0)
		return ret;
#endif

	/* Execute AutoGainOn */
	if ((ret = aiptek_command(aiptek, 0x12, 0xff)) < 0)
		return ret;

	/* Reset the eventCount, so we track events from last (re)programming
	 */
	aiptek->diagnostic = AIPTEK_DIAGNOSTIC_NA;
	aiptek->eventCount = 0;

	return 0;
}

/***********************************************************************
 * Sysfs functions. Sysfs prefers that individually-tunable parameters
 * exist in their separate pseudo-files. Summary data that is immutable
 * may exist in a singular file so long as you don't define a writeable
 * interface.
 */

/***********************************************************************
 * support the 'size' file -- display support
 */
static ssize_t show_tabletSize(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct aiptek *aiptek = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%dx%d\n",
			aiptek->inputdev->absmax[ABS_X] + 1,
			aiptek->inputdev->absmax[ABS_Y] + 1);
}

/* These structs define the sysfs files, param #1 is the name of the
 * file, param 2 is the file permissions, param 3 & 4 are to the
 * output generator and input parser routines. Absence of a routine is
 * permitted -- it only means can't either 'cat' the file, or send data
 * to it.
 */
static DEVICE_ATTR(size, S_IRUGO, show_tabletSize, NULL);

/***********************************************************************
 * support routines for the 'pointer_mode' file. Note that this file
 * both displays current setting and allows reprogramming.
 */
static struct aiptek_map pointer_mode_map[] = {
	{ "stylus",	AIPTEK_POINTER_ONLY_STYLUS_MODE },
	{ "mouse",	AIPTEK_POINTER_ONLY_MOUSE_MODE },
	{ "either",	AIPTEK_POINTER_EITHER_MODE },
	{ NULL,		AIPTEK_INVALID_VALUE }
};

static ssize_t show_tabletPointerMode(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct aiptek *aiptek = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%s\n",
			map_val_to_str(pointer_mode_map,
					aiptek->curSetting.pointerMode));
}

static ssize_t
store_tabletPointerMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct aiptek *aiptek = dev_get_drvdata(dev);
	int new_mode = map_str_to_val(pointer_mode_map, buf, count);

	if (new_mode == AIPTEK_INVALID_VALUE)
		return -EINVAL;

	aiptek->newSetting.pointerMode = new_mode;
	return count;
}

static DEVICE_ATTR(pointer_mode,
		   S_IRUGO | S_IWUGO,
		   show_tabletPointerMode, store_tabletPointerMode);

/***********************************************************************
 * support routines for the 'coordinate_mode' file. Note that this file
 * both displays current setting and allows reprogramming.
 */

static struct aiptek_map coordinate_mode_map[] = {
	{ "absolute",	AIPTEK_COORDINATE_ABSOLUTE_MODE },
	{ "relative",	AIPTEK_COORDINATE_RELATIVE_MODE },
	{ NULL,		AIPTEK_INVALID_VALUE }
};

static ssize_t show_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct aiptek *aiptek = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%s\n",
			map_val_to_str(coordinate_mode_map,
					aiptek->curSetting.coordinateMode));
}

static ssize_t
store_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct aiptek *aiptek = dev_get_drvdata(dev);
	int new_mode = map_str_to_val(coordinate_mode_map, buf, count);

	if (new_mode == AIPTEK_INVALID_VALUE)
		return -EINVAL;

	aiptek->newSetting.coordinateMode = new_mode;
	return count;
}

static DEVICE_ATTR(coordinate_mode,
		   S_IRUGO | S_IWUGO,
		   show_tabletCoordinateMode, store_tabletCoordinateMode);

/***********************************************************************
 * support routines for the 'tool_mode' file. Note that this file
 * both displays current setting and allows reprogramming.
 */

static struct aiptek_map tool_mode_map[] = {
	{ "mouse",	AIPTEK_TOOL_BUTTON_MOUSE_MODE },
	{ "eraser",	AIPTEK_TOOL_BUTTON_ERASER_MODE },
	{ "pencil",	AIPTEK_TOOL_BUTTON_PENCIL_MODE },
	{ "pen",	AIPTEK_TOOL_BUTTON_PEN_MODE },
	{ "brush",	AIPTEK_TOOL_BUTTON_BRUSH_MODE },
	{ "airbrush",	AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE },
	{ "lens",	AIPTEK_TOOL_BUTTON_LENS_MODE },
	{ NULL,		AIPTEK_INVALID_VALUE }
};