Merge branch 'next' into for-linus

15 files changed, 531 insertions, 137 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index cabd9e54863f..3488ffe1fa0a 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -651,6 +651,18 @@ config TOUCHSCREEN_TOUCHIT213
 	  To compile this driver as a module, choose M here: the
 	  module will be called touchit213.
 
+config TOUCHSCREEN_TSC_SERIO
+	tristate "TSC-10/25/40 serial touchscreen support"
+	select SERIO
+	help
+	  Say Y here if you have a TSC-10, 25 or 40 serial touchscreen connected
+	  to your system.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called tsc40.
+
 config TOUCHSCREEN_TSC2005
         tristate "TSC2005 based touchscreens"
         depends on SPI_MASTER && GENERIC_HARDIRQS
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 282d6f76ae26..f957676035a4 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -46,6 +46,7 @@ obj-$(CONFIG_TOUCHSCREEN_TNETV107X)	+= tnetv107x-ts.o
 obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213)	+= touchit213.o
 obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT)	+= touchright.o
 obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN)	+= touchwin.o
+obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO)	+= tsc40.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2005)	+= tsc2005.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2007)	+= tsc2007.o
 obj-$(CONFIG_TOUCHSCREEN_UCB1400)	+= ucb1400_ts.o
diff --git a/drivers/input/touchscreen/ad7879-i2c.c b/drivers/input/touchscreen/ad7879-i2c.c
index 4e4e58cec6c8..c789b974c795 100644
--- a/drivers/input/touchscreen/ad7879-i2c.c
+++ b/drivers/input/touchscreen/ad7879-i2c.c
@@ -16,7 +16,7 @@
 
 #define AD7879_DEVID		0x79	/* AD7879-1/AD7889-1 */
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int ad7879_i2c_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -36,9 +36,9 @@ static int ad7879_i2c_resume(struct device *dev)
 
 	return 0;
 }
+#endif
 
 static SIMPLE_DEV_PM_OPS(ad7879_i2c_pm, ad7879_i2c_suspend, ad7879_i2c_resume);
-#endif
 
 /* All registers are word-sized.
  * AD7879 uses a high-byte first convention.
@@ -119,9 +119,7 @@ static struct i2c_driver ad7879_i2c_driver = {
 	.driver = {
 		.name	= "ad7879",
 		.owner	= THIS_MODULE,
-#ifdef CONFIG_PM
 		.pm	= &ad7879_i2c_pm,
-#endif
 	},
 	.probe		= ad7879_i2c_probe,
 	.remove		= __devexit_p(ad7879_i2c_remove),
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index f5d66859f232..a596c2775d1a 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -910,12 +910,17 @@ static ssize_t mxt_object_show(struct device *dev,
 	for (i = 0; i < data->info.object_num; i++) {
 		object = data->object_table + i;
 
-		count += sprintf(buf + count,
-				"Object Table Element %d(Type %d)\n",
+		count += snprintf(buf + count, PAGE_SIZE - count,
+				"Object[%d] (Type %d)\n",
 				i + 1, object->type);
+		if (count >= PAGE_SIZE)
+			return PAGE_SIZE - 1;
 
 		if (!mxt_object_readable(object->type)) {
-			count += sprintf(buf + count, "\n");
+			count += snprintf(buf + count, PAGE_SIZE - count,
+					"\n");
+			if (count >= PAGE_SIZE)
+				return PAGE_SIZE - 1;
 			continue;
 		}
 
@@ -925,11 +930,15 @@ static ssize_t mxt_object_show(struct device *dev,
 			if (error)
 				return error;
 
-			count += sprintf(buf + count,
-					"  Byte %d: 0x%x (%d)\n", j, val, val);
+			count += snprintf(buf + count, PAGE_SIZE - count,
+					"\t[%2d]: %02x (%d)\n", j, val, val);
+			if (count >= PAGE_SIZE)
+				return PAGE_SIZE - 1;
 		}
 
-		count += sprintf(buf + count, "\n");
+		count += snprintf(buf + count, PAGE_SIZE - count, "\n");
+		if (count >= PAGE_SIZE)
+			return PAGE_SIZE - 1;
 	}
 
 	return count;
diff --git a/drivers/input/touchscreen/atmel_tsadcc.c b/drivers/input/touchscreen/atmel_tsadcc.c
index 432c69be6ac6..122a87883659 100644
--- a/drivers/input/touchscreen/atmel_tsadcc.c
+++ b/drivers/input/touchscreen/atmel_tsadcc.c
@@ -229,7 +229,7 @@ static int __devinit atmel_tsadcc_probe(struct platform_device *pdev)
 		goto err_release_mem;
 	}
 
-	err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, IRQF_DISABLED,
+	err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, 0,
 			pdev->dev.driver->name, ts_dev);
 	if (err) {
 		dev_err(&pdev->dev, "failed to allocate irq.\n");
diff --git a/drivers/input/touchscreen/h3600_ts_input.c b/drivers/input/touchscreen/h3600_ts_input.c
index 211811ae5525..6107e563e681 100644
--- a/drivers/input/touchscreen/h3600_ts_input.c
+++ b/drivers/input/touchscreen/h3600_ts_input.c
@@ -396,14 +396,14 @@ static int h3600ts_connect(struct serio *serio, struct serio_driver *drv)
 	set_GPIO_IRQ_edge(GPIO_BITSY_NPOWER_BUTTON, GPIO_RISING_EDGE);
 
 	if (request_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, action_button_handler,
-			IRQF_SHARED | IRQF_DISABLED, "h3600_action", ts->dev)) {
+			IRQF_SHARED, "h3600_action", ts->dev)) {
 		printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n");
 		err = -EBUSY;
 		goto fail1;
 	}
 
 	if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler,
-			IRQF_SHARED | IRQF_DISABLED, "h3600_suspend", ts->dev)) {
+			IRQF_SHARED, "h3600_suspend", ts->dev)) {
 		printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n");
 		err = -EBUSY;
 		goto fail2;
diff --git a/drivers/input/touchscreen/hp680_ts_input.c b/drivers/input/touchscreen/hp680_ts_input.c
index dd4e8f020b99..639a6044183d 100644
--- a/drivers/input/touchscreen/hp680_ts_input.c
+++ b/drivers/input/touchscreen/hp680_ts_input.c
@@ -93,7 +93,7 @@ static int __init hp680_ts_init(void)
 	hp680_ts_dev->phys = "hp680_ts/input0";
 
 	if (request_irq(HP680_TS_IRQ, hp680_ts_interrupt,
-			IRQF_DISABLED, MODNAME, 0) < 0) {
+			0, MODNAME, 0) < 0) {
 		printk(KERN_ERR "hp680_touchscreen.c: Can't allocate irq %d\n",
 		       HP680_TS_IRQ);
 		err = -EBUSY;
diff --git a/drivers/input/touchscreen/jornada720_ts.c b/drivers/input/touchscreen/jornada720_ts.c
index 4b0a061811ff..50076c2d59e2 100644
--- a/drivers/input/touchscreen/jornada720_ts.c
+++ b/drivers/input/touchscreen/jornada720_ts.c
@@ -127,7 +127,7 @@ static int __devinit jornada720_ts_probe(struct platform_device *pdev)
 
 	error = request_irq(IRQ_GPIO9,
 			jornada720_ts_interrupt,
-			IRQF_DISABLED | IRQF_TRIGGER_RISING,
+			IRQF_TRIGGER_RISING,
 			"HP7XX Touchscreen driver", pdev);
 	if (error) {
 		printk(KERN_INFO "HP7XX TS : Unable to acquire irq!\n");
diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c
index dcf803f5a1f7..0a484ed5295c 100644
--- a/drivers/input/touchscreen/lpc32xx_ts.c
+++ b/drivers/input/touchscreen/lpc32xx_ts.c
@@ -276,7 +276,7 @@ static int __devinit lpc32xx_ts_probe(struct platform_device *pdev)
 	input_set_drvdata(input, tsc);
 
 	error = request_irq(tsc->irq, lpc32xx_ts_interrupt,
-			    IRQF_DISABLED, pdev->name, tsc);
+			    0, pdev->name, tsc);
 	if (error) {
 		dev_err(&pdev->dev, "failed requesting interrupt\n");
 		goto err_put_clock;
diff --git a/drivers/input/touchscreen/penmount.c b/drivers/input/touchscreen/penmount.c
index c7f9cebebbb6..4c012fb2b01e 100644
--- a/drivers/input/touchscreen/penmount.c
+++ b/drivers/input/touchscreen/penmount.c
@@ -2,6 +2,7 @@
  * Penmount serial touchscreen driver
  *
  * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
+ * Copyright (c) 2011 John Sung <penmount.touch@gmail.com>
  *
  * Based on ELO driver (drivers/input/touchscreen/elo.c)
  * Copyright (c) 2004 Vojtech Pavlik
@@ -18,12 +19,14 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/input.h>
+#include <linux/input/mt.h>
 #include <linux/serio.h>
 #include <linux/init.h>
 
-#define DRIVER_DESC	"Penmount serial touchscreen driver"
+#define DRIVER_DESC	"PenMount serial touchscreen driver"
 
 MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
+MODULE_AUTHOR("John Sung <penmount.touch@gmail.com>");
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
@@ -31,7 +34,19 @@ MODULE_LICENSE("GPL");
  * Definitions & global arrays.
  */
 
-#define	PM_MAX_LENGTH	5
+#define	PM_MAX_LENGTH	6
+#define	PM_MAX_MTSLOT	16
+#define	PM_3000_MTSLOT	2
+#define	PM_6250_MTSLOT	12
+
+/*
+ * Multi-touch slot
+ */
+
+struct mt_slot {
+	unsigned short x, y;
+	bool active; /* is the touch valid? */
+};
 
 /*
  * Per-touchscreen data.
@@ -43,25 +58,119 @@ struct pm {
 	int idx;
 	unsigned char data[PM_MAX_LENGTH];
 	char phys[32];
+	unsigned char packetsize;
+	unsigned char maxcontacts;
+	struct mt_slot slots[PM_MAX_MTSLOT];
+	void (*parse_packet)(struct pm *);
 };
 
-static irqreturn_t pm_interrupt(struct serio *serio,
-		unsigned char data, unsigned int flags)
+/*
+ * pm_mtevent() sends mt events and also emulates pointer movement
+ */
+
+static void pm_mtevent(struct pm *pm, struct input_dev *input)
+{
+	int i;
+
+	for (i = 0; i < pm->maxcontacts; ++i) {
+		input_mt_slot(input, i);
+		input_mt_report_slot_state(input, MT_TOOL_FINGER,
+				pm->slots[i].active);
+		if (pm->slots[i].active) {
+			input_event(input, EV_ABS, ABS_MT_POSITION_X, pm->slots[i].x);
+			input_event(input, EV_ABS, ABS_MT_POSITION_Y, pm->slots[i].y);
+		}
+	}
+
+	input_mt_report_pointer_emulation(input, true);
+	input_sync(input);
+}
+
+/*
+ * pm_checkpacket() checks if data packet is valid
+ */
+
+static bool pm_checkpacket(unsigned char *packet)
+{
+	int total = 0;
+	int i;
+
+	for (i = 0; i < 5; i++)
+		total += packet[i];
+
+	return packet[5] == (unsigned char)~(total & 0xff);
+}
+
+static void pm_parse_9000(struct pm *pm)
 {
-	struct pm *pm = serio_get_drvdata(serio);
 	struct input_dev *dev = pm->dev;
 
-	pm->data[pm->idx] = data;
+	if ((pm->data[0] & 0x80) && pm->packetsize == ++pm->idx) {
+		input_report_abs(dev, ABS_X, pm->data[1] * 128 + pm->data[2]);
+		input_report_abs(dev, ABS_Y, pm->data[3] * 128 + pm->data[4]);
+		input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
+		input_sync(dev);
+		pm->idx = 0;
+	}
+}
 
-	if (pm->data[0] & 0x80) {
-		if (PM_MAX_LENGTH == ++pm->idx) {
-			input_report_abs(dev, ABS_X, pm->data[2] * 128 + pm->data[1]);
-			input_report_abs(dev, ABS_Y, pm->data[4] * 128 + pm->data[3]);
-			input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
+static void pm_parse_6000(struct pm *pm)
+{
+	struct input_dev *dev = pm->dev;
+
+	if ((pm->data[0] & 0xbf) == 0x30 && pm->packetsize == ++pm->idx) {
+		if (pm_checkpacket(pm->data)) {
+			input_report_abs(dev, ABS_X,
+					pm->data[2] * 256 + pm->data[1]);
+			input_report_abs(dev, ABS_Y,
+					pm->data[4] * 256 + pm->data[3]);
+			input_report_key(dev, BTN_TOUCH, pm->data[0] & 0x40);
 			input_sync(dev);
-			pm->idx = 0;
 		}
+		pm->idx = 0;
+	}
+}
+
+static void pm_parse_3000(struct pm *pm)
+{
+	struct input_dev *dev = pm->dev;
+
+	if ((pm->data[0] & 0xce) == 0x40 && pm->packetsize == ++pm->idx) {
+		if (pm_checkpacket(pm->data)) {
+			int slotnum = pm->data[0] & 0x0f;
+			pm->slots[slotnum].active = pm->data[0] & 0x30;
+			pm->slots[slotnum].x = pm->data[2] * 256 + pm->data[1];
+			pm->slots[slotnum].y = pm->data[4] * 256 + pm->data[3];
+			pm_mtevent(pm, dev);
+		}
+		pm->idx = 0;
+	}
+}
+
+static void pm_parse_6250(struct pm *pm)
+{
+	struct input_dev *dev = pm->dev;
+
+	if ((pm->data[0] & 0xb0) == 0x30 && pm->packetsize == ++pm->idx) {
+		if (pm_checkpacket(pm->data)) {
+			int slotnum = pm->data[0] & 0x0f;
+			pm->slots[slotnum].active = pm->data[0] & 0x40;
+			pm->slots[slotnum].x = pm->data[2] * 256 + pm->data[1];
+			pm->slots[slotnum].y = pm->data[4] * 256 + pm->data[3];
+			pm_mtevent(pm, dev);
+		}
+		pm->idx = 0;
 	}
+}
+
+static irqreturn_t pm_interrupt(struct serio *serio,
+		unsigned char data, unsigned int flags)
+{
+	struct pm *pm = serio_get_drvdata(serio);
+
+	pm->data[pm->idx] = data;
+
+	pm->parse_packet(pm);
 
 	return IRQ_HANDLED;
 }
@@ -74,17 +183,17 @@ static void pm_disconnect(struct serio *serio)
 {
 	struct pm *pm = serio_get_drvdata(serio);
 
-	input_get_device(pm->dev);
-	input_unregister_device(pm->dev);
 	serio_close(serio);
-	serio_set_drvdata(serio, NULL);
-	input_put_device(pm->dev);
+
+	input_unregister_device(pm->dev);
 	kfree(pm);
+
+	serio_set_drvdata(serio, NULL);
 }
 
 /*
  * pm_connect() is the routine that is called when someone adds a
- * new serio device that supports Gunze protocol and registers it as
+ * new serio device that supports PenMount protocol and registers it as
  * an input device.
  */
 
@@ -92,6 +201,7 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
 {
 	struct pm *pm;
 	struct input_dev *input_dev;
+	int max_x, max_y;
 	int err;
 
 	pm = kzalloc(sizeof(struct pm), GFP_KERNEL);
@@ -104,8 +214,9 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
 	pm->serio = serio;
 	pm->dev = input_dev;
 	snprintf(pm->phys, sizeof(pm->phys), "%s/input0", serio->phys);
+	pm->maxcontacts = 1;
 
-	input_dev->name = "Penmount Serial TouchScreen";
+	input_dev->name = "PenMount Serial TouchScreen";
 	input_dev->phys = pm->phys;
 	input_dev->id.bustype = BUS_RS232;
 	input_dev->id.vendor = SERIO_PENMOUNT;
@@ -113,10 +224,52 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
 	input_dev->id.version = 0x0100;
 	input_dev->dev.parent = &serio->dev;
 
-        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
-        input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
-        input_set_abs_params(pm->dev, ABS_X, 0, 0x3ff, 0, 0);
-        input_set_abs_params(pm->dev, ABS_Y, 0, 0x3ff, 0, 0);
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+	switch (serio->id.id) {
+	default:
+	case 0:
+		pm->packetsize = 5;
+		pm->parse_packet = pm_parse_9000;
+		input_dev->id.product = 0x9000;
+		max_x = max_y = 0x3ff;
+		break;
+
+	case 1:
+		pm->packetsize = 6;
+		pm->parse_packet = pm_parse_6000;
+		input_dev->id.product = 0x6000;
+		max_x = max_y = 0x3ff;
+		break;
+
+	case 2:
+		pm->packetsize = 6;
+		pm->parse_packet = pm_parse_3000;
+		input_dev->id.product = 0x3000;
+		max_x = max_y = 0x7ff;
+		pm->maxcontacts = PM_3000_MTSLOT;
+		break;
+
+	case 3:
+		pm->packetsize = 6;
+		pm->parse_packet = pm_parse_6250;
+		input_dev->id.product = 0x6250;
+		max_x = max_y = 0x3ff;
+		pm->maxcontacts = PM_6250_MTSLOT;
+		break;
+	}
+
+	input_set_abs_params(pm->dev, ABS_X, 0, max_x, 0, 0);
+	input_set_abs_params(pm->dev, ABS_Y, 0, max_y, 0, 0);
+
+	if (pm->maxcontacts > 1) {
+		input_mt_init_slots(pm->dev, pm->maxcontacts);
+		input_set_abs_params(pm->dev,
+				     ABS_MT_POSITION_X, 0, max_x, 0, 0);
+		input_set_abs_params(pm->dev,
+				     ABS_MT_POSITION_Y, 0, max_y, 0, 0);
+	}
 
 	serio_set_drvdata(serio, pm);
 
@@ -155,7 +308,7 @@ MODULE_DEVICE_TABLE(serio, pm_serio_ids);
 
 static struct serio_driver pm_drv = {
 	.driver		= {
-		.name	= "penmountlpc",
+		.name	= "serio-penmount",
 	},
 	.description	= DRIVER_DESC,
 	.id_table	= pm_serio_ids,
diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c
index 8feb7f3c8be1..64ce697a3456 100644
--- a/drivers/input/touchscreen/s3c2410_ts.c
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -328,7 +328,7 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev)
 	ts.shift = info->oversampling_shift;
 	ts.features = platform_get_device_id(pdev)->driver_data;
 
-	ret = request_irq(ts.irq_tc, stylus_irq, IRQF_DISABLED,
+	ret = request_irq(ts.irq_tc, stylus_irq, 0,
 			  "s3c2410_ts_pen", ts.input);
 	if (ret) {
 		dev_err(dev, "cannot get TC interrupt\n");
diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c
index fadc11545b1e..1f674cb6c55b 100644
--- a/drivers/input/touchscreen/tsc2007.c
+++ b/drivers/input/touchscreen/tsc2007.c
@@ -66,7 +66,6 @@ struct ts_event {
 struct tsc2007 {
 	struct input_dev	*input;
 	char			phys[32];
-	struct delayed_work	work;
 
 	struct i2c_client	*client;
 
@@ -76,9 +75,11 @@ struct tsc2007 {
 	unsigned long		poll_delay;
 	unsigned long		poll_period;
 
-	bool			pendown;
 	int			irq;
 
+	wait_queue_head_t	wait;
+	bool			stopped;
+
 	int			(*get_pendown_state)(void);
 	void			(*clear_penirq)(void);
 };
@@ -141,25 +142,8 @@ static u32 tsc2007_calculate_pressure(struct tsc2007 *tsc, struct ts_event *tc)
 	return rt;
 }
 
-static void tsc2007_send_up_event(struct tsc2007 *tsc)
+static bool tsc2007_is_pen_down(struct tsc2007 *ts)
 {
-	struct input_dev *input = tsc->input;
-
-	dev_dbg(&tsc->client->dev, "UP\n");
-
-	input_report_key(input, BTN_TOUCH, 0);
-	input_report_abs(input, ABS_PRESSURE, 0);
-	input_sync(input);
-}
-
-static void tsc2007_work(struct work_struct *work)
-{
-	struct tsc2007 *ts =
-		container_of(to_delayed_work(work), struct tsc2007, work);
-	bool debounced = false;
-	struct ts_event tc;
-	u32 rt;
-
 	/*
 	 * NOTE: We can't rely on the pressure to determine the pen down
 	 * state, even though this controller has a pressure sensor.
@@ -170,79 +154,82 @@ static void tsc2007_work(struct work_struct *work)
 	 * The only safe way to check for the pen up condition is in the
 	 * work function by reading the pen signal state (it's a GPIO
 	 * and IRQ). Unfortunately such callback is not always available,
-	 * in that case we have rely on the pressure anyway.
+	 * in that case we assume that the pen is down and expect caller
+	 * to fall back on the pressure reading.
 	 */
-	if (ts->get_pendown_state) {
-		if (unlikely(!ts->get_pendown_state())) {
-			tsc2007_send_up_event(ts);
-			ts->pendown = false;
-			goto out;
-		}
 
-		dev_dbg(&ts->client->dev, "pen is still down\n");
-	}
+	if (!ts->get_pendown_state)
+		return true;
+
+	return ts->get_pendown_state();
+}
+
+static irqreturn_t tsc2007_soft_irq(int irq, void *handle)
+{
+	struct tsc2007 *ts = handle;
+	struct input_dev *input = ts->input;
+	struct ts_event tc;
+	u32 rt;
 
-	tsc2007_read_values(ts, &tc);
+	while (!ts->stopped && tsc2007_is_pen_down(ts)) {
 
-	rt = tsc2007_calculate_pressure(ts, &tc);
-	if (rt > ts->max_rt) {
-		/*
-		 * Sample found inconsistent by debouncing or pressure is
-		 * beyond the maximum. Don't report it to user space,
-		 * repeat at least once more the measurement.
-		 */
-		dev_dbg(&ts->client->dev, "ignored pressure %d\n", rt);
-		debounced = true;
-		goto out;
+		/* pen is down, continue with the measurement */
+		tsc2007_read_values(ts, &tc);
 
-	}
+		rt = tsc2007_calculate_pressure(ts, &tc);
 
-	if (rt) {
-		struct input_dev *input = ts->input;
+		if (rt == 0 && !ts->get_pendown_state) {
+			/*
+			 * If pressure reported is 0 and we don't have
+			 * callback to check pendown state, we have to
+			 * assume that pen was lifted up.
+			 */
+			break;
+		}
 
-		if (!ts->pendown) {
-			dev_dbg(&ts->client->dev, "DOWN\n");
+		if (rt <= ts->max_rt) {
+			dev_dbg(&ts->client->dev,
+				"DOWN point(%4d,%4d), pressure (%4u)\n",
+				tc.x, tc.y, rt);
 
 			input_report_key(input, BTN_TOUCH, 1);
-			ts->pendown = true;
+			input_report_abs(input, ABS_X, tc.x);
+			input_report_abs(input, ABS_Y, tc.y);
+			input_report_abs(input, ABS_PRESSURE, rt);
+
+			input_sync(input);
+
+		} else {
+			/*
+			 * Sample found inconsistent by debouncing or pressure is
+			 * beyond the maximum. Don't report it to user space,
+			 * repeat at least once more the measurement.
+			 */
+			dev_dbg(&ts->client->dev, "ignored pressure %d\n", rt);
 		}
 
-		input_report_abs(input, ABS_X, tc.x);
-		input_report_abs(input, ABS_Y, tc.y);
-		input_report_abs(input, ABS_PRESSURE, rt);
+		wait_event_timeout(ts->wait, ts->stopped,
+				   msecs_to_jiffies(ts->poll_period));
+	}
 
-		input_sync(input);
+	dev_dbg(&ts->client->dev, "UP\n");
 
-		dev_dbg(&ts->client->dev, "point(%4d,%4d), pressure (%4u)\n",
-			tc.x, tc.y, rt);
+	input_report_key(input, BTN_TOUCH, 0);
+	input_report_abs(input, ABS_PRESSURE, 0);
+	input_sync(input);
 
-	} else if (!ts->get_pendown_state && ts->pendown) {
-		/*
-		 * We don't have callback to check pendown state, so we
-		 * have to assume that since pressure reported is 0 the
-		 * pen was lifted up.
-		 */
-		tsc2007_send_up_event(ts);
-		ts->pendown = false;
-	}
+	if (ts->clear_penirq)
+		ts->clear_penirq();
 
- out:
-	if (ts->pendown || debounced)
-		schedule_delayed_work(&ts->work,
-				      msecs_to_jiffies(ts->poll_period));
-	else
-		enable_irq(ts->irq);
+	return IRQ_HANDLED;
 }
 
-static irqreturn_t tsc2007_irq(int irq, void *handle)
+static irqreturn_t tsc2007_hard_irq(int irq, void *handle)
 {
 	struct tsc2007 *ts = handle;
 
-	if (!ts->get_pendown_state || likely(ts->get_pendown_state())) {
-		disable_irq_nosync(ts->irq);
-		schedule_delayed_work(&ts->work,
-				      msecs_to_jiffies(ts->poll_delay));
-	}
+	if (!ts->get_pendown_state || likely(ts->get_pendown_state()))
+		return IRQ_WAKE_THREAD;
 
 	if (ts->clear_penirq)
 		ts->clear_penirq();
@@ -250,17 +237,40 @@ static irqreturn_t tsc2007_irq(int irq, void *handle)
 	return IRQ_HANDLED;
 }
 
-static void tsc2007_free_irq(struct tsc2007 *ts)
+static void tsc2007_stop(struct tsc2007 *ts)
 {
-	free_irq(ts->irq, ts);
-	if (cancel_delayed_work_sync(&ts->work)) {
-		/*
-		 * Work was pending, therefore we need to enable
-		 * IRQ here to balance the disable_irq() done in the
-		 * interrupt handler.
-		 */
-		enable_irq(ts->irq);
+	ts->stopped = true;
+	mb();
+	wake_up(&ts->wait);
+
+	disable_irq(ts->irq);
+}
+
+static int tsc2007_open(struct input_dev *input_dev)
+{
+	struct tsc2007 *ts = input_get_drvdata(input_dev);
+	int err;
+
+	ts->stopped = false;
+	mb();
+
+	enable_irq(ts->irq);
+
+	/* Prepare for touch readings - power down ADC and enable PENIRQ */
+	err = tsc2007_xfer(ts, PWRDOWN);
+	if (err < 0) {
+		tsc2007_stop(ts);
+		return err;
 	}
+
+	return 0;
+}
+
+static void tsc2007_close(struct input_dev *input_dev)
+{
+	struct tsc2007 *ts = input_get_drvdata(input_dev);
+
+	tsc2007_stop(ts);
 }
 
 static int __devinit tsc2007_probe(struct i2c_client *client,
@@ -290,7 +300,7 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
 	ts->client = client;
 	ts->irq = client->irq;
 	ts->input = input_dev;
-	INIT_DELAYED_WORK(&ts->work, tsc2007_work);
+	init_waitqueue_head(&ts->wait);
 
 	ts->model             = pdata->model;
 	ts->x_plate_ohms      = pdata->x_plate_ohms;
@@ -300,6 +310,12 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
 	ts->get_pendown_state = pdata->get_pendown_state;
 	ts->clear_penirq      = pdata->clear_penirq;
 
+	if (pdata->x_plate_ohms == 0) {
+		dev_err(&client->dev, "x_plate_ohms is not set up in platform data");
+		err = -EINVAL;
+		goto err_free_mem;
+	}
+
 	snprintf(ts->phys, sizeof(ts->phys),
 		 "%s/input0", dev_name(&client->dev));
 
@@ -307,6 +323,11 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
 	input_dev->phys = ts->phys;
 	input_dev->id.bustype = BUS_I2C;
 
+	input_dev->open = tsc2007_open;
+	input_dev->close = tsc2007_close;
+
+	input_set_drvdata(input_dev, ts);
+
 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 
@@ -318,17 +339,14 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
 	if (pdata->init_platform_hw)
 		pdata->init_platform_hw();
 
-	err = request_irq(ts->irq, tsc2007_irq, 0,
-			client->dev.driver->name, ts);
+	err = request_threaded_irq(ts->irq, tsc2007_hard_irq, tsc2007_soft_irq,
+				   IRQF_ONESHOT, client->dev.driver->name, ts);
 	if (err < 0) {
 		dev_err(&client->dev, "irq %d busy?\n", ts->irq);
 		goto err_free_mem;
 	}
 
-	/* Prepare for touch readings - power down ADC and enable PENIRQ */
-	err = tsc2007_xfer(ts, PWRDOWN);
-	if (err < 0)
-		goto err_free_irq;
+	tsc2007_stop(ts);
 
 	err = input_register_device(input_dev);
 	if (err)
@@ -339,7 +357,7 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
 	return 0;
 
  err_free_irq:
-	tsc2007_free_irq(ts);
+	free_irq(ts->irq, ts);
 	if (pdata->exit_platform_hw)
 		pdata->exit_platform_hw();
  err_free_mem:
@@ -353,7 +371,7 @@ static int __devexit tsc2007_remove(struct i2c_client *client)
 	struct tsc2007	*ts = i2c_get_clientdata(client);
 	struct tsc2007_platform_data *pdata = client->dev.platform_data;
 
-	tsc2007_free_irq(ts);
+	free_irq(ts->irq, ts);
 
 	if (pdata->exit_platform_hw)
 		pdata->exit_platform_hw();
diff --git a/drivers/input/touchscreen/tsc40.c b/drivers/input/touchscreen/tsc40.c
new file mode 100644
index 000000000000..29d5ed4dd31c
--- /dev/null
+++ b/drivers/input/touchscreen/tsc40.c
@@ -0,0 +1,184 @@
+/*
+ * TSC-40 serial touchscreen driver. It should be compatible with
+ * TSC-10 and 25.
+ *
+ * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+ * License: GPLv2 as published by the FSF.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/init.h>
+
+#define PACKET_LENGTH  5
+struct tsc_ser {
+	struct input_dev *dev;
+	struct serio *serio;
+	u32 idx;
+	unsigned char data[PACKET_LENGTH];
+	char phys[32];
+};
+
+static void tsc_process_data(struct tsc_ser *ptsc)
+{
+	struct input_dev *dev = ptsc->dev;
+	u8 *data = ptsc->data;
+	u32 x;
+	u32 y;
+
+	x = ((data[1] & 0x03) << 8) | data[2];
+	y = ((data[3] & 0x03) << 8) | data[4];
+
+	input_report_abs(dev, ABS_X, x);
+	input_report_abs(dev, ABS_Y, y);
+	input_report_key(dev, BTN_TOUCH, 1);
+
+	input_sync(dev);
+}
+
+static irqreturn_t tsc_interrupt(struct serio *serio,
+		unsigned char data, unsigned int flags)
+{
+	struct tsc_ser *ptsc = serio_get_drvdata(serio);
+	struct input_dev *dev = ptsc->dev;
+
+	ptsc->data[ptsc->idx] = data;
+	switch (ptsc->idx++) {
+	case 0:
+		if (unlikely((data & 0x3e) != 0x10)) {
+			dev_dbg(&serio->dev,
+				"unsynchronized packet start (0x%02x)\n", data);
+			ptsc->idx = 0;
+		} else if (!(data & 0x01)) {
+			input_report_key(dev, BTN_TOUCH, 0);
+			input_sync(dev);
+			ptsc->idx = 0;
+		}
+		break;
+
+	case 1:
+	case 3:
+		if (unlikely(data & 0xfc)) {
+			dev_dbg(&serio->dev,
+				"unsynchronized data 0x%02x at offset %d\n",
+				data, ptsc->idx - 1);
+			ptsc->idx = 0;
+		}
+		break;
+
+	case 4:
+		tsc_process_data(ptsc);
+		ptsc->idx = 0;
+		break;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int tsc_connect(struct serio *serio, struct serio_driver *drv)
+{
+	struct tsc_ser *ptsc;
+	struct input_dev *input_dev;
+	int error;
+
+	ptsc = kzalloc(sizeof(struct tsc_ser), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!ptsc || !input_dev) {
+		error = -ENOMEM;
+		goto fail1;
+	}
+
+	ptsc->serio = serio;
+	ptsc->dev = input_dev;
+	snprintf(ptsc->phys, sizeof(ptsc->phys), "%s/input0", serio->phys);
+
+	input_dev->name = "TSC-10/25/40 Serial TouchScreen";
+	input_dev->phys = ptsc->phys;
+	input_dev->id.bustype = BUS_RS232;
+	input_dev->id.vendor = SERIO_TSC40;
+	input_dev->id.product = 40;
+	input_dev->id.version = 0x0001;
+	input_dev->dev.parent = &serio->dev;
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	__set_bit(BTN_TOUCH, input_dev->keybit);
+	input_set_abs_params(ptsc->dev, ABS_X, 0, 0x3ff, 0, 0);
+	input_set_abs_params(ptsc->dev, ABS_Y, 0, 0x3ff, 0, 0);
+	input_set_abs_params(ptsc->dev, ABS_PRESSURE, 0, 0, 0, 0);
+
+	serio_set_drvdata(serio, ptsc);
+
+	error = serio_open(serio, drv);
+	if (error)
+		goto fail2;
+
+	error = input_register_device(ptsc->dev);
+	if (error)
+		goto fail3;
+
+	return 0;
+
+fail3:
+	serio_close(serio);
+fail2:
+	serio_set_drvdata(serio, NULL);
+fail1:
+	input_free_device(input_dev);
+	kfree(ptsc);
+	return error;
+}
+
+static void tsc_disconnect(struct serio *serio)
+{
+	struct tsc_ser *ptsc = serio_get_drvdata(serio);
+
+	serio_close(serio);
+
+	input_unregister_device(ptsc->dev);
+	kfree(ptsc);
+
+	serio_set_drvdata(serio, NULL);
+}
+
+static struct serio_device_id tsc_serio_ids[] = {
+	{
+		.type   = SERIO_RS232,
+		.proto  = SERIO_TSC40,
+		.id     = SERIO_ANY,
+		.extra  = SERIO_ANY,
+	},
+	{ 0 }
+};
+MODULE_DEVICE_TABLE(serio, tsc_serio_ids);
+
+#define DRIVER_DESC    "TSC-10/25/40 serial touchscreen driver"
+
+static struct serio_driver tsc_drv = {
+	.driver	= {
+		.name   = "tsc40",
+	},
+	.description    = DRIVER_DESC,
+	.id_table	= tsc_serio_ids,
+	.interrupt      = tsc_interrupt,
+	.connect	= tsc_connect,
+	.disconnect     = tsc_disconnect,
+};
+
+static int __init tsc_ser_init(void)
+{
+	return serio_register_driver(&tsc_drv);
+}
+module_init(tsc_ser_init);
+
+static void __exit tsc_exit(void)
+{
+	serio_unregister_driver(&tsc_drv);
+}
+module_exit(tsc_exit);
+
+MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/input/touchscreen/w90p910_ts.c b/drivers/input/touchscreen/w90p910_ts.c
index 7a45d68c3516..217aa51135c5 100644
--- a/drivers/input/touchscreen/w90p910_ts.c
+++ b/drivers/input/touchscreen/w90p910_ts.c
@@ -279,7 +279,7 @@ static int __devinit w90x900ts_probe(struct platform_device *pdev)
 
 	w90p910_ts->irq_num = platform_get_irq(pdev, 0);
 	if (request_irq(w90p910_ts->irq_num, w90p910_ts_interrupt,
-			IRQF_DISABLED, "w90p910ts", w90p910_ts)) {
+			0, "w90p910ts", w90p910_ts)) {
 		err = -EBUSY;
 		goto fail4;
 	}
diff --git a/drivers/input/touchscreen/wacom_w8001.c b/drivers/input/touchscreen/wacom_w8001.c
index 9941d39df43d..1569a3934ab2 100644
--- a/drivers/input/touchscreen/wacom_w8001.c
+++ b/drivers/input/touchscreen/wacom_w8001.c
@@ -367,6 +367,20 @@ static int w8001_command(struct w8001 *w8001, unsigned char command,
 	return rc;
 }
 
+static int w8001_open(struct input_dev *dev)
+{
+	struct w8001 *w8001 = input_get_drvdata(dev);
+
+	return w8001_command(w8001, W8001_CMD_START, false);
+}
+
+static void w8001_close(struct input_dev *dev)
+{
+	struct w8001 *w8001 = input_get_drvdata(dev);
+
+	w8001_command(w8001, W8001_CMD_STOP, false);
+}
+
 static int w8001_setup(struct w8001 *w8001)
 {
 	struct input_dev *dev = w8001->dev;
@@ -476,7 +490,7 @@ static int w8001_setup(struct w8001 *w8001)
 
 	strlcat(w8001->name, " Touchscreen", sizeof(w8001->name));
 
-	return w8001_command(w8001, W8001_CMD_START, false);
+	return 0;
 }
 
 /*
@@ -487,12 +501,12 @@ static void w8001_disconnect(struct serio *serio)
 {
 	struct w8001 *w8001 = serio_get_drvdata(serio);
 
-	input_get_device(w8001->dev);
-	input_unregister_device(w8001->dev);
 	serio_close(serio);
-	serio_set_drvdata(serio, NULL);
-	input_put_device(w8001->dev);
+
+	input_unregister_device(w8001->dev);
 	kfree(w8001);
+
+	serio_set_drvdata(serio, NULL);
 }
 
 /*
@@ -536,6 +550,11 @@ static int w8001_connect(struct serio *serio, struct serio_driver *drv)
 	input_dev->id.version = 0x0100;
 	input_dev->dev.parent = &serio->dev;
 
+	input_dev->open = w8001_open;
+	input_dev->close = w8001_close;
+
+	input_set_drvdata(input_dev, w8001);
+
 	err = input_register_device(w8001->dev);
 	if (err)
 		goto fail3;