Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (22 commits)
  Input: ALPS - add interleaved protocol support (Dell E6x00 series)
  Input: keyboard - don't override beep with a bell
  Input: altera_ps2 - fix test of unsigned in altera_ps2_probe()
  Input: add mc13783 touchscreen driver
  Input: ep93xx_keypad - update driver to new core support
  Input: wacom - separate pen from express keys on Graphire
  Input: wacom - add defines for data packet report IDs
  Input: wacom - add support for new LCD tablets
  Input: wacom - add defines for packet lengths of various devices
  Input: wacom - ensure the device is initialized properly upon resume
  Input: at32psif - do not sleep in atomic context
  Input: i8042 - add Gigabyte M1022M to the noloop list
  Input: i8042 - allow installing platform filters for incoming data
  Input: i8042 - fix locking in interrupt routine
  Input: ALPS - do not set REL_X/REL_Y capabilities on the touchpad
  Input: document use of input_event() function
  Input: sa1111ps2 - annotate probe() and remove() methods
  Input: ambakmi - annotate probe() and remove() methods
  Input: gscps2 - fix probe() and remove() annotations
  Input: altera_ps2 - add annotations to probe and remove methods
  ...

arch/arm/mach-ep93xx/include/mach/ep93xx_keypad.h

@@ -5,9 +5,6 @@
 #ifndef __ASM_ARCH_EP93XX_KEYPAD_H
 #define __ASM_ARCH_EP93XX_KEYPAD_H
 
-#define MAX_MATRIX_KEY_ROWS		(8)
-#define MAX_MATRIX_KEY_COLS		(8)
-
 /* flags for the ep93xx_keypad driver */
 #define EP93XX_KEYPAD_DISABLE_3_KEY	(1<<0)	/* disable 3-key reset */
 #define EP93XX_KEYPAD_DIAG_MODE		(1<<1)	/* diagnostic mode */
@@ -18,8 +15,6 @@
 
 /**
  * struct ep93xx_keypad_platform_data - platform specific device structure
- * @matrix_key_rows:		number of rows in the keypad matrix
- * @matrix_key_cols:		number of columns in the keypad matrix
  * @matrix_key_map:		array of keycodes defining the keypad matrix
  * @matrix_key_map_size:	ARRAY_SIZE(matrix_key_map)
  * @debounce:			debounce start count; terminal count is 0xff
@@ -27,8 +22,6 @@
  * @flags:			see above
  */
 struct ep93xx_keypad_platform_data {
-	unsigned int	matrix_key_rows;
-	unsigned int	matrix_key_cols;
 	unsigned int	*matrix_key_map;
 	int		matrix_key_map_size;
 	unsigned int	debounce;
@@ -36,7 +29,7 @@ struct ep93xx_keypad_platform_data {
 	unsigned int	flags;
 };
 
-/* macro for creating the matrix_key_map table */
-#define KEY(row, col, val)	(((row) << 28) | ((col) << 24) | (val))
+#define EP93XX_MATRIX_ROWS		(8)
+#define EP93XX_MATRIX_COLS		(8)
 
 #endif	/* __ASM_ARCH_EP93XX_KEYPAD_H */

drivers/char/keyboard.c

@@ -233,7 +233,8 @@ int setkeycode(unsigned int scancode, unsigned int keycode)
 }
 
 /*
- * Making beeps and bells.
+ * Making beeps and bells. Note that we prefer beeps to bells, but when
+ * shutting the sound off we do both.
  */
 
 static int kd_sound_helper(struct input_handle *handle, void *data)
@@ -242,9 +243,12 @@ static int kd_sound_helper(struct input_handle *handle, void *data)
 	struct input_dev *dev = handle->dev;
 
 	if (test_bit(EV_SND, dev->evbit)) {
-		if (test_bit(SND_TONE, dev->sndbit))
+		if (test_bit(SND_TONE, dev->sndbit)) {
 			input_inject_event(handle, EV_SND, SND_TONE, *hz);
-		if (test_bit(SND_BELL, handle->dev->sndbit))
+			if (*hz)
+				return 0;
+		}
+		if (test_bit(SND_BELL, dev->sndbit))
 			input_inject_event(handle, EV_SND, SND_BELL, *hz ? 1 : 0);
 	}
 

drivers/input/input.c

@@ -296,9 +296,15 @@ static void input_handle_event(struct input_dev *dev,
  * @value: value of the event
  *
  * This function should be used by drivers implementing various input
- * devices. See also input_inject_event().
+ * devices to report input events. See also input_inject_event().
+ *
+ * NOTE: input_event() may be safely used right after input device was
+ * allocated with input_allocate_device(), even before it is registered
+ * with input_register_device(), but the event will not reach any of the
+ * input handlers. Such early invocation of input_event() may be used
+ * to 'seed' initial state of a switch or initial position of absolute
+ * axis, etc.
  */
-
 void input_event(struct input_dev *dev,
 		 unsigned int type, unsigned int code, int value)
 {

drivers/input/keyboard/ep93xx_keypad.c

@@ -22,11 +22,11 @@
 
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
-#include <linux/input.h>
 #include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/input/matrix_keypad.h>
 
 #include <mach/hardware.h>
-#include <mach/gpio.h>
 #include <mach/ep93xx_keypad.h>
 
 /*
@@ -60,38 +60,37 @@
 #define KEY_REG_KEY1_MASK	(0x0000003f)
 #define KEY_REG_KEY1_SHIFT	(0)
 
-#define keypad_readl(off)	__raw_readl(keypad->mmio_base + (off))
-#define keypad_writel(v, off)	__raw_writel((v), keypad->mmio_base + (off))
-
-#define MAX_MATRIX_KEY_NUM	(MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS)
+#define EP93XX_MATRIX_SIZE	(EP93XX_MATRIX_ROWS * EP93XX_MATRIX_COLS)
 
 struct ep93xx_keypad {
 	struct ep93xx_keypad_platform_data *pdata;
-
-	struct clk *clk;
 	struct input_dev *input_dev;
+	struct clk *clk;
+
 	void __iomem *mmio_base;
 
-	int irq;
-	int enabled;
+	unsigned int matrix_keycodes[EP93XX_MATRIX_SIZE];
 
 	int key1;
 	int key2;
 
-	unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
+	int irq;
+
+	bool enabled;
 };
 
 static void ep93xx_keypad_build_keycode(struct ep93xx_keypad *keypad)
 {
 	struct ep93xx_keypad_platform_data *pdata = keypad->pdata;
 	struct input_dev *input_dev = keypad->input_dev;
+	unsigned int *key;
 	int i;
 
-	for (i = 0; i < pdata->matrix_key_map_size; i++) {
-		unsigned int key = pdata->matrix_key_map[i];
-		int row = (key >> 28) & 0xf;
-		int col = (key >> 24) & 0xf;
-		int code = key & 0xffffff;
+	key = &pdata->matrix_key_map[0];
+	for (i = 0; i < pdata->matrix_key_map_size; i++, key++) {
+		int row = KEY_ROW(*key);
+		int col = KEY_COL(*key);
+		int code = KEY_VAL(*key);
 
 		keypad->matrix_keycodes[(row << 3) + col] = code;
 		__set_bit(code, input_dev->keybit);
@@ -102,9 +101,11 @@ static irqreturn_t ep93xx_keypad_irq_handler(int irq, void *dev_id)
 {
 	struct ep93xx_keypad *keypad = dev_id;
 	struct input_dev *input_dev = keypad->input_dev;
-	unsigned int status = keypad_readl(KEY_REG);
+	unsigned int status;
 	int keycode, key1, key2;
 
+	status = __raw_readl(keypad->mmio_base + KEY_REG);
+
 	keycode = (status & KEY_REG_KEY1_MASK) >> KEY_REG_KEY1_SHIFT;
 	key1 = keypad->matrix_keycodes[keycode];
 
@@ -152,7 +153,10 @@ static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
 	struct ep93xx_keypad_platform_data *pdata = keypad->pdata;
 	unsigned int val = 0;
 
-	clk_set_rate(keypad->clk, pdata->flags & EP93XX_KEYPAD_KDIV);
+	if (pdata->flags & EP93XX_KEYPAD_KDIV)
+		clk_set_rate(keypad->clk, EP93XX_KEYTCHCLK_DIV4);
+	else
+		clk_set_rate(keypad->clk, EP93XX_KEYTCHCLK_DIV16);
 
 	if (pdata->flags & EP93XX_KEYPAD_DISABLE_3_KEY)
 		val |= KEY_INIT_DIS3KY;
@@ -167,7 +171,7 @@ static void ep93xx_keypad_config(struct ep93xx_keypad *keypad)
 
 	val |= ((pdata->prescale << KEY_INIT_PRSCL_SHIFT) & KEY_INIT_PRSCL_MASK);
 
-	keypad_writel(val, KEY_INIT);
+	__raw_writel(val, keypad->mmio_base + KEY_INIT);
 }
 
 static int ep93xx_keypad_open(struct input_dev *pdev)
@@ -177,7 +181,7 @@ static int ep93xx_keypad_open(struct input_dev *pdev)
 	if (!keypad->enabled) {
 		ep93xx_keypad_config(keypad);
 		clk_enable(keypad->clk);
-		keypad->enabled = 1;
+		keypad->enabled = true;
 	}
 
 	return 0;
@@ -189,7 +193,7 @@ static void ep93xx_keypad_close(struct input_dev *pdev)
 
 	if (keypad->enabled) {
 		clk_disable(keypad->clk);
-		keypad->enabled = 0;
+		keypad->enabled = false;
 	}
 }
 
@@ -211,7 +215,7 @@ static int ep93xx_keypad_suspend(struct platform_device *pdev,
 
 	if (keypad->enabled) {
 		clk_disable(keypad->clk);
-		keypad->enabled = 0;
+		keypad->enabled = false;
 	}
 
 	mutex_unlock(&input_dev->mutex);
@@ -236,7 +240,7 @@ static int ep93xx_keypad_resume(struct platform_device *pdev)
 		if (!keypad->enabled) {
 			ep93xx_keypad_config(keypad);
 			clk_enable(keypad->clk);
-			keypad->enabled = 1;
+			keypad->enabled = true;
 		}
 	}
 
@@ -252,88 +256,56 @@ static int ep93xx_keypad_resume(struct platform_device *pdev)
 static int __devinit ep93xx_keypad_probe(struct platform_device *pdev)
 {
 	struct ep93xx_keypad *keypad;
-	struct ep93xx_keypad_platform_data *pdata = pdev->dev.platform_data;
 	struct input_dev *input_dev;
 	struct resource *res;
-	int irq, err, i, gpio;
-
-	if (!pdata ||
-	    !pdata->matrix_key_rows ||
-	    pdata->matrix_key_rows > MAX_MATRIX_KEY_ROWS ||
-	    !pdata->matrix_key_cols ||
-	    pdata->matrix_key_cols > MAX_MATRIX_KEY_COLS) {
-		dev_err(&pdev->dev, "invalid or missing platform data\n");
-		return -EINVAL;
-	}
+	int err;
 
 	keypad = kzalloc(sizeof(struct ep93xx_keypad), GFP_KERNEL);
-	if (!keypad) {
-		dev_err(&pdev->dev, "failed to allocate driver data\n");
+	if (!keypad)
 		return -ENOMEM;
-	}
 
-	keypad->pdata = pdata;
+	keypad->pdata = pdev->dev.platform_data;
+	if (!keypad->pdata) {
+		err = -EINVAL;
+		goto failed_free;
+	}
 
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		dev_err(&pdev->dev, "failed to get keypad irq\n");
+	keypad->irq = platform_get_irq(pdev, 0);
+	if (!keypad->irq) {
 		err = -ENXIO;
 		goto failed_free;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
-		dev_err(&pdev->dev, "failed to get I/O memory\n");
 		err = -ENXIO;
 		goto failed_free;
 	}
 
 	res = request_mem_region(res->start, resource_size(res), pdev->name);
 	if (!res) {
-		dev_err(&pdev->dev, "failed to request I/O memory\n");
 		err = -EBUSY;
 		goto failed_free;
 	}
 
 	keypad->mmio_base = ioremap(res->start, resource_size(res));
 	if (keypad->mmio_base == NULL) {
-		dev_err(&pdev->dev, "failed to remap I/O memory\n");
 		err = -ENXIO;
 		goto failed_free_mem;
 	}
 
-	/* Request the needed GPIO's */
-	gpio = EP93XX_GPIO_LINE_ROW0;
-	for (i = 0; i < keypad->pdata->matrix_key_rows; i++, gpio++) {
-		err = gpio_request(gpio, pdev->name);
-		if (err) {
-			dev_err(&pdev->dev, "failed to request gpio-%d\n",
-				gpio);
-			goto failed_free_rows;
-		}
-	}
-
-	gpio = EP93XX_GPIO_LINE_COL0;
-	for (i = 0; i < keypad->pdata->matrix_key_cols; i++, gpio++) {
-		err = gpio_request(gpio, pdev->name);
-		if (err) {
-			dev_err(&pdev->dev, "failed to request gpio-%d\n",
-				gpio);
-			goto failed_free_cols;
-		}
-	}
+	err = ep93xx_keypad_acquire_gpio(pdev);
+	if (err)
+		goto failed_free_io;
 
-	keypad->clk = clk_get(&pdev->dev, "key_clk");
+	keypad->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(keypad->clk)) {
-		dev_err(&pdev->dev, "failed to get keypad clock\n");
 		err = PTR_ERR(keypad->clk);
-		goto failed_free_io;
+		goto failed_free_gpio;
 	}
 
-	/* Create and register the input driver */
 	input_dev = input_allocate_device();
 	if (!input_dev) {
-		dev_err(&pdev->dev, "failed to allocate input device\n");
 		err = -ENOMEM;
 		goto failed_put_clk;
 	}
@@ -358,44 +330,29 @@ static int __devinit ep93xx_keypad_probe(struct platform_device *pdev)
 	ep93xx_keypad_build_keycode(keypad);
 	platform_set_drvdata(pdev, keypad);
 
-	err = request_irq(irq, ep93xx_keypad_irq_handler, IRQF_DISABLED,
-				pdev->name, keypad);
-	if (err) {
-		dev_err(&pdev->dev, "failed to request IRQ\n");
+	err = request_irq(keypad->irq, ep93xx_keypad_irq_handler,
+			  IRQF_DISABLED, pdev->name, keypad);
+	if (err)
 		goto failed_free_dev;
-	}
-
-	keypad->irq = irq;
 
-	/* Register the input device */
 	err = input_register_device(input_dev);
-	if (err) {
-		dev_err(&pdev->dev, "failed to register input device\n");
+	if (err)
 		goto failed_free_irq;
-	}
 
 	device_init_wakeup(&pdev->dev, 1);
 
 	return 0;
 
 failed_free_irq:
-	free_irq(irq, pdev);
+	free_irq(keypad->irq, pdev);
 	platform_set_drvdata(pdev, NULL);
 failed_free_dev:
 	input_free_device(input_dev);
 failed_put_clk:
 	clk_put(keypad->clk);
+failed_free_gpio:
+	ep93xx_keypad_release_gpio(pdev);
 failed_free_io:
-	i = keypad->pdata->matrix_key_cols - 1;
-	gpio = EP93XX_GPIO_LINE_COL0 + i;
-failed_free_cols:
-	for ( ; i >= 0; i--, gpio--)
-		gpio_free(gpio);
-	i = keypad->pdata->matrix_key_rows - 1;
-	gpio = EP93XX_GPIO_LINE_ROW0 + i;
-failed_free_rows:
-	for ( ; i >= 0; i--, gpio--)
-		gpio_free(gpio);
 	iounmap(keypad->mmio_base);
 failed_free_mem:
 	release_mem_region(res->start, resource_size(res));
@@ -408,7 +365,6 @@ static int __devexit ep93xx_keypad_remove(struct platform_device *pdev)
 {
 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
 	struct resource *res;
-	int i, gpio;
 
 	free_irq(keypad->irq, pdev);
 
@@ -420,15 +376,7 @@ static int __devexit ep93xx_keypad_remove(struct platform_device *pdev)
 
 	input_unregister_device(keypad->input_dev);
 
-	i = keypad->pdata->matrix_key_cols - 1;
-	gpio = EP93XX_GPIO_LINE_COL0 + i;
-	for ( ; i >= 0; i--, gpio--)
-		gpio_free(gpio);
-
-	i = keypad->pdata->matrix_key_rows - 1;
-	gpio = EP93XX_GPIO_LINE_ROW0 + i;
-	for ( ; i >= 0; i--, gpio--)
-		gpio_free(gpio);
+	ep93xx_keypad_release_gpio(pdev);
 
 	iounmap(keypad->mmio_base);
 

drivers/input/mouse/alps.c

@@ -5,6 +5,7 @@
  * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
  * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net>
  *
  * ALPS detection, tap switching and status querying info is taken from
  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
@@ -28,7 +29,6 @@
 #define dbg(format, arg...) do {} while (0)
 #endif
 
-
 #define ALPS_OLDPROTO		0x01	/* old style input */
 #define ALPS_DUALPOINT		0x02	/* touchpad has trackstick */
 #define ALPS_PASS		0x04	/* device has a pass-through port */
@@ -37,7 +37,8 @@
 #define ALPS_FW_BK_1		0x10	/* front & back buttons present */
 #define ALPS_FW_BK_2		0x20	/* front & back buttons present */
 #define ALPS_FOUR_BUTTONS	0x40	/* 4 direction button present */
-
+#define ALPS_PS2_INTERLEAVED	0x80	/* 3-byte PS/2 packet interleaved with
+					   6-byte ALPS packet */
 
 static const struct alps_model_info alps_model_data[] = {
 	{ { 0x32, 0x02, 0x14 },	0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
@@ -58,7 +59,9 @@ static const struct alps_model_info alps_model_data[] = {
 	{ { 0x20, 0x02, 0x0e },	0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
 	{ { 0x22, 0x02, 0x0a },	0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
 	{ { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
-	{ { 0x62, 0x02, 0x14 }, 0xcf, 0xcf, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude E6500 */
+	/* Dell Latitude E5500, E6400, E6500, Precision M4400 */
+	{ { 0x62, 0x02, 0x14 }, 0xcf, 0xcf,
+		ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
 	{ { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FOUR_BUTTONS },	  /* Dell Vostro 1400 */
 };
 
@@ -69,7 +72,15 @@ static const struct alps_model_info alps_model_data[] = {
  */
 
 /*
- * ALPS abolute Mode - new format
+ * PS/2 packet format
+ *
+ * byte 0:  0    0 YSGN XSGN    1    M    R    L
+ * byte 1: X7   X6   X5   X4   X3   X2   X1   X0
+ * byte 2: Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
+ *
+ * Note that the device never signals overflow condition.
+ *
+ * ALPS absolute Mode - new format
  *
  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
@@ -78,11 +89,71 @@ static const struct alps_model_info alps_model_data[] = {
  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  *
+ * Dualpoint device -- interleaved packet format
+ *
+ * byte 0:    1    1    0    0    1    1    1    1
+ * byte 1:    0   x6   x5   x4   x3   x2   x1   x0
+ * byte 2:    0  x10   x9   x8   x7    0  fin  ges
+ * byte 3:    0    0 YSGN XSGN    1    1    1    1
+ * byte 4:   X7   X6   X5   X4   X3   X2   X1   X0
+ * byte 5:   Y7   Y6   Y5   Y4   Y3   Y2   Y1   Y0
+ * byte 6:    0   y9   y8   y7    1    m    r    l
+ * byte 7:    0   y6   y5   y4   y3   y2   y1   y0
+ * byte 8:    0   z6   z5   z4   z3   z2   z1   z0
+ *
+ * CAPITALS = stick, miniscules = touchpad
+ *
  * ?'s can have different meanings on different models,
  * such as wheel rotation, extra buttons, stick buttons
  * on a dualpoint, etc.
  */
 
+static bool alps_is_valid_first_byte(const struct alps_model_info *model,
+				     unsigned char data)
+{
+	return (data & model->mask0) == model->byte0;
+}
+
+static void alps_report_buttons(struct psmouse *psmouse,
+				struct input_dev *dev1, struct input_dev *dev2,
+				int left, int right, int middle)
+{
+	struct alps_data *priv = psmouse->private;
+	const struct alps_model_info *model = priv->i;
+
+	if (model->flags & ALPS_PS2_INTERLEAVED) {
+		struct input_dev *dev;
+
+		/*
+		 * If shared button has already been reported on the
+		 * other device (dev2) then this event should be also
+		 * sent through that device.
+		 */
+		dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
+		input_report_key(dev, BTN_LEFT, left);
+
+		dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
+		input_report_key(dev, BTN_RIGHT, right);
+
+		dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
+		input_report_key(dev, BTN_MIDDLE, middle);
+
+		/*
+		 * Sync the _other_ device now, we'll do the first
+		 * device later once we report the rest of the events.
+		 */
+		input_sync(dev2);
+	} else {
+		/*
+		 * For devices with non-interleaved packets we know what
+		 * device buttons belong to so we can simply report them.
+		 */
+		input_report_key(dev1, BTN_LEFT, left);
+		input_report_key(dev1, BTN_RIGHT, right);
+		input_report_key(dev1, BTN_MIDDLE, middle);
+	}
+}
+
 static void alps_process_packet(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
@@ -93,18 +164,6 @@ static void alps_process_packet(struct psmouse *psmouse)
 	int x, y, z, ges, fin, left, right, middle;
 	int back = 0, forward = 0;
 
-	if ((packet[0] & 0xc8) == 0x08) {   /* 3-byte PS/2 packet */
-		input_report_key(dev2, BTN_LEFT,   packet[0] & 1);
-		input_report_key(dev2, BTN_RIGHT,  packet[0] & 2);
-		input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
-		input_report_rel(dev2, REL_X,
-			packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
-		input_report_rel(dev2, REL_Y,
-			packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
-		input_sync(dev2);
-		return;
-	}
-
 	if (model->flags & ALPS_OLDPROTO) {
 		left = packet[2] & 0x10;
 		right = packet[2] & 0x08;
@@ -140,18 +199,13 @@ static void alps_process_packet(struct psmouse *psmouse)
 		input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 		input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 
-		input_report_key(dev2, BTN_LEFT, left);
-		input_report_key(dev2, BTN_RIGHT, right);
-		input_report_key(dev2, BTN_MIDDLE, middle);
+		alps_report_buttons(psmouse, dev2, dev, left, right, middle);
 
-		input_sync(dev);
 		input_sync(dev2);
 		return;
 	}
 
-	input_report_key(dev, BTN_LEFT, left);
-	input_report_key(dev, BTN_RIGHT, right);
-	input_report_key(dev, BTN_MIDDLE, middle);
+	alps_report_buttons(psmouse, dev, dev2, left, right, middle);
 
 	/* Convert hardware tap to a reasonable Z value */
 	if (ges && !fin)
@@ -202,25 +256,168 @@ static void alps_process_packet(struct psmouse *psmouse)
 	input_sync(dev);
 }
 
+static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
+					unsigned char packet[],
+					bool report_buttons)
+{
+	struct alps_data *priv = psmouse->private;
+	struct input_dev *dev2 = priv->dev2;
+
+	if (report_buttons)
+		alps_report_buttons(psmouse, dev2, psmouse->dev,
+				packet[0] & 1, packet[0] & 2, packet[0] & 4);
+
+	input_report_rel(dev2, REL_X,
+		packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
+	input_report_rel(dev2, REL_Y,
+		packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
+
+	input_sync(dev2);
+}
+
+static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
+{
+	struct alps_data *priv = psmouse->private;
+
+	if (psmouse->pktcnt < 6)
+		return PSMOUSE_GOOD_DATA;
+
+	if (psmouse->pktcnt == 6) {
+		/*
+		 * Start a timer to flush the packet if it ends up last
+		 * 6-byte packet in the stream. Timer needs to fire
+		 * psmouse core times out itself. 20 ms should be enough
+		 * to decide if we are getting more data or not.
+		 */
+		mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
+		return PSMOUSE_GOOD_DATA;
+	}
+
+	del_timer(&priv->timer);
+
+	if (psmouse->packet[6] & 0x80) {
+
+		/*
+		 * Highest bit is set - that means we either had
+		 * complete ALPS packet and this is start of the
+		 * next packet or we got garbage.
+		 */
+
+		if (((psmouse->packet[3] |
+		      psmouse->packet[4] |
+		      psmouse->packet[5]) & 0x80) ||
+		    (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
+			dbg("refusing packet %x %x %x %x "
+			    "(suspected interleaved ps/2)\n",
+			    psmouse->packet[3], psmouse->packet[4],
+			    psmouse->packet[5], psmouse->packet[6]);
+			return PSMOUSE_BAD_DATA;
+		}
+
+		alps_process_packet(psmouse);
+
+		/* Continue with the next packet */
+		psmouse->packet[0] = psmouse->packet[6];
+		psmouse->pktcnt = 1;
+
+	} else {
+
+		/*
+		 * High bit is 0 - that means that we indeed got a PS/2
+		 * packet in the middle of ALPS packet.
+		 *
+		 * There is also possibility that we got 6-byte ALPS
+		 * packet followed  by 3-byte packet from trackpoint. We
+		 * can not distinguish between these 2 scenarios but
+		 * becase the latter is unlikely to happen in course of
+		 * normal operation (user would need to press all
+		 * buttons on the pad and start moving trackpoint
+		 * without touching the pad surface) we assume former.
+		 * Even if we are wrong the wost thing that would happen
+		 * the cursor would jump but we should not get protocol
+		 * desynchronization.
+		 */
+
+		alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
+					    false);
+
+		/*
+		 * Continue with the standard ALPS protocol handling,
+		 * but make sure we won't process it as an interleaved
+		 * packet again, which may happen if all buttons are
+		 * pressed. To avoid this let's reset the 4th bit which
+		 * is normally 1.
+		 */
+		psmouse->packet[3] = psmouse->packet[6] & 0xf7;
+		psmouse->pktcnt = 4;
+	}
+
+	return PSMOUSE_GOOD_DATA;
+}
+
+static void alps_flush_packet(unsigned long data)
+{
+	struct psmouse *psmouse = (struct psmouse *)data;
+
+	serio_pause_rx(psmouse->ps2dev.serio);
+
+	if (psmouse->pktcnt == 6) {
+
+		/*
+		 * We did not any more data in reasonable amount of time.
+		 * Validate the last 3 bytes and process as a standard
+		 * ALPS packet.
+		 */
+		if ((psmouse->packet[3] |
+		     psmouse->packet[4] |
+		     psmouse->packet[5]) & 0x80) {
+			dbg("refusing packet %x %x %x "
+			    "(suspected interleaved ps/2)\n",
+			    psmouse->packet[3], psmouse->packet[4],
+			    psmouse->packet[5]);
+		} else {
+			alps_process_packet(psmouse);
+		}
+		psmouse->pktcnt = 0;
+	}
+
+	serio_continue_rx(psmouse->ps2dev.serio);
+}
+
 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
+	const struct alps_model_info *model = priv->i;
 
 	if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 		if (psmouse->pktcnt == 3) {
-			alps_process_packet(psmouse);
+			alps_report_bare_ps2_packet(psmouse, psmouse->packet,
+						    true);
 			return PSMOUSE_FULL_PACKET;
 		}
 		return PSMOUSE_GOOD_DATA;
 	}
 
-	if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
+	/* Check for PS/2 packet stuffed in the middle of ALPS packet. */
+
+	if ((model->flags & ALPS_PS2_INTERLEAVED) &&
+	    psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
+		return alps_handle_interleaved_ps2(psmouse);
+	}
+
+	if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
+		dbg("refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
+		    psmouse->packet[0], model->mask0, model->byte0);
 		return PSMOUSE_BAD_DATA;
+	}
 
 	/* Bytes 2 - 6 should have 0 in the highest bit */
 	if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
-	    (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
+	    (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
+		dbg("refusing packet[%i] = %x\n",
+		    psmouse->pktcnt - 1, psmouse->packet[psmouse->pktcnt - 1]);
 		return PSMOUSE_BAD_DATA;
+	}
 
 	if (psmouse->pktcnt == 6) {
 		alps_process_packet(psmouse);
@@ -459,6 +656,7 @@ static void alps_disconnect(struct psmouse *psmouse)
 	struct alps_data *priv = psmouse->private;
 
 	psmouse_reset(psmouse);
+	del_timer_sync(&priv->timer);
 	input_unregister_device(priv->dev2);
 	kfree(priv);
 }
@@ -476,6 +674,8 @@ int alps_init(struct psmouse *psmouse)
 		goto init_fail;
 
 	priv->dev2 = dev2;
+	setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
+
 	psmouse->private = priv;
 
 	model = alps_get_model(psmouse, &version);
@@ -487,6 +687,17 @@ int alps_init(struct psmouse *psmouse)
 	if (alps_hw_init(psmouse))
 		goto init_fail;
 
+	/*
+	 * Undo part of setup done for us by psmouse core since touchpad
+	 * is not a relative device.
+	 */
+	__clear_bit(EV_REL, dev1->evbit);
+	__clear_bit(REL_X, dev1->relbit);
+	__clear_bit(REL_Y, dev1->relbit);
+
+	/*
+	 * Now set up our capabilities.
+	 */
 	dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
 	dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
 	dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);

drivers/input/mouse/alps.h

@@ -23,6 +23,7 @@ struct alps_data {
 	char phys[32];			/* Phys */
 	const struct alps_model_info *i;/* Info */
 	int prev_fin;			/* Finger bit from previous packet */
+	struct timer_list timer;
 };
 
 #ifdef CONFIG_MOUSE_PS2_ALPS

drivers/input/serio/altera_ps2.c

@@ -79,11 +79,11 @@ static void altera_ps2_close(struct serio *io)
 /*
  * Add one device to this driver.
  */
-static int altera_ps2_probe(struct platform_device *pdev)
+static int __devinit altera_ps2_probe(struct platform_device *pdev)
 {
 	struct ps2if *ps2if;
 	struct serio *serio;
-	int error;
+	int error, irq;
 
 	ps2if = kzalloc(sizeof(struct ps2if), GFP_KERNEL);
 	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
@@ -108,11 +108,13 @@ static int altera_ps2_probe(struct platform_device *pdev)
 		goto err_free_mem;
 	}
 
-	ps2if->irq  = platform_get_irq(pdev, 0);
-	if (ps2if->irq < 0) {
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
 		error = -ENXIO;
 		goto err_free_mem;
 	}
+	ps2if->irq = irq;
 
 	if (!request_mem_region(ps2if->iomem_res->start,
 				resource_size(ps2if->iomem_res), pdev->name)) {
@@ -155,7 +157,7 @@ static int altera_ps2_probe(struct platform_device *pdev)
 /*
  * Remove one device from this driver.
  */
-static int altera_ps2_remove(struct platform_device *pdev)
+static int __devexit altera_ps2_remove(struct platform_device *pdev)
 {
 	struct ps2if *ps2if = platform_get_drvdata(pdev);
 
@@ -175,9 +177,10 @@ static int altera_ps2_remove(struct platform_device *pdev)
  */
 static struct platform_driver altera_ps2_driver = {
 	.probe		= altera_ps2_probe,
-	.remove		= altera_ps2_remove,
+	.remove		= __devexit_p(altera_ps2_remove),
 	.driver	= {
 		.name	= DRV_NAME,
+		.owner	= THIS_MODULE,
 	},
 };
 

drivers/input/serio/ambakmi.c

@@ -107,7 +107,7 @@ static void amba_kmi_close(struct serio *io)
 	clk_disable(kmi->clk);
 }
 
-static int amba_kmi_probe(struct amba_device *dev, struct amba_id *id)
+static int __devinit amba_kmi_probe(struct amba_device *dev, struct amba_id *id)
 {
 	struct amba_kmi_port *kmi;
 	struct serio *io;
@@ -162,7 +162,7 @@ static int amba_kmi_probe(struct amba_device *dev, struct amba_id *id)
 	return ret;
 }
 
-static int amba_kmi_remove(struct amba_device *dev)
+static int __devexit amba_kmi_remove(struct amba_device *dev)
 {
 	struct amba_kmi_port *kmi = amba_get_drvdata(dev);
 
@@ -197,10 +197,11 @@ static struct amba_id amba_kmi_idtable[] = {
 static struct amba_driver ambakmi_driver = {
 	.drv		= {
 		.name	= "kmi-pl050",
+		.owner	= THIS_MODULE,
 	},
 	.id_table	= amba_kmi_idtable,
 	.probe		= amba_kmi_probe,
-	.remove		= amba_kmi_remove,
+	.remove		= __devexit_p(amba_kmi_remove),
 	.resume		= amba_kmi_resume,
 };
 

drivers/input/serio/at32psif.c

@@ -137,7 +137,7 @@ static int psif_write(struct serio *io, unsigned char val)
 	spin_lock_irqsave(&psif->lock, flags);
 
 	while (!(psif_readl(psif, SR) & PSIF_BIT(TXEMPTY)) && timeout--)
-		msleep(10);
+		udelay(50);
 
 	if (timeout >= 0) {
 		psif_writel(psif, THR, val);
@@ -352,6 +352,7 @@ static struct platform_driver psif_driver = {
 	.remove		= __exit_p(psif_remove),
 	.driver		= {
 		.name	= "atmel_psif",
+		.owner	= THIS_MODULE,
 	},
 	.suspend	= psif_suspend,
 	.resume		= psif_resume,

drivers/input/serio/gscps2.c

@@ -326,7 +326,7 @@ static void gscps2_close(struct serio *port)
  * @return: success/error report
  */
 
-static int __init gscps2_probe(struct parisc_device *dev)
+static int __devinit gscps2_probe(struct parisc_device *dev)
 {
 	struct gscps2port *ps2port;
 	struct serio *serio;
@@ -443,7 +443,7 @@ static struct parisc_driver parisc_ps2_driver = {
 	.name		= "gsc_ps2",
 	.id_table	= gscps2_device_tbl,
 	.probe		= gscps2_probe,
-	.remove		= gscps2_remove,
+	.remove		= __devexit_p(gscps2_remove),
 };
 
 static int __init gscps2_init(void)

drivers/input/serio/hil_mlc.c

@@ -993,10 +993,8 @@ int hil_mlc_unregister(hil_mlc *mlc)
 
 static int __init hil_mlc_init(void)
 {
-	init_timer(&hil_mlcs_kicker);
-	hil_mlcs_kicker.expires = jiffies + HZ;
-	hil_mlcs_kicker.function = &hil_mlcs_timer;
-	add_timer(&hil_mlcs_kicker);
+	setup_timer(&hil_mlcs_kicker, &hil_mlcs_timer, 0);
+	mod_timer(&hil_mlcs_kicker, jiffies + HZ);
 
 	tasklet_enable(&hil_mlcs_tasklet);
 
@@ -1005,7 +1003,7 @@ static int __init hil_mlc_init(void)
 
 static void __exit hil_mlc_exit(void)
 {
-	del_timer(&hil_mlcs_kicker);
+	del_timer_sync(&hil_mlcs_kicker);
 
 	tasklet_disable(&hil_mlcs_tasklet);
 	tasklet_kill(&hil_mlcs_tasklet);

drivers/input/serio/i8042-x86ia64io.h

@@ -157,6 +157,14 @@ static const struct dmi_system_id __initconst i8042_dmi_noloop_table[] = {
 			DMI_MATCH(DMI_PRODUCT_VERSION, "01"),
 		},
 	},
+	{
+		/* Gigabyte M1022M netbook */
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co.,Ltd."),
+			DMI_MATCH(DMI_BOARD_NAME, "M1022E"),
+			DMI_MATCH(DMI_BOARD_VERSION, "1.02"),
+		},
+	},
 	{
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),

drivers/input/serio/i8042.c

@@ -126,6 +126,8 @@ static unsigned char i8042_suppress_kbd_ack;
 static struct platform_device *i8042_platform_device;
 
 static irqreturn_t i8042_interrupt(int irq, void *dev_id);
+static bool (*i8042_platform_filter)(unsigned char data, unsigned char str,
+				     struct serio *serio);
 
 void i8042_lock_chip(void)
 {
@@ -139,6 +141,48 @@ void i8042_unlock_chip(void)
 }
 EXPORT_SYMBOL(i8042_unlock_chip);
 
+int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
+					struct serio *serio))
+{
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&i8042_lock, flags);
+
+	if (i8042_platform_filter) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	i8042_platform_filter = filter;
+
+out:
+	spin_unlock_irqrestore(&i8042_lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(i8042_install_filter);
+
+int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
+				       struct serio *port))
+{
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&i8042_lock, flags);
+
+	if (i8042_platform_filter != filter) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	i8042_platform_filter = NULL;
+
+out:
+	spin_unlock_irqrestore(&i8042_lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL(i8042_remove_filter);
+
 /*
  * The i8042_wait_read() and i8042_wait_write functions wait for the i8042 to
  * be ready for reading values from it / writing values to it.
@@ -368,6 +412,31 @@ static void i8042_stop(struct serio *serio)
 	port->serio = NULL;
 }
 
+/*
+ * i8042_filter() filters out unwanted bytes from the input data stream.
+ * It is called from i8042_interrupt and thus is running with interrupts
+ * off and i8042_lock held.
+ */
+static bool i8042_filter(unsigned char data, unsigned char str,
+			 struct serio *serio)
+{
+	if (unlikely(i8042_suppress_kbd_ack)) {
+		if ((~str & I8042_STR_AUXDATA) &&
+		    (data == 0xfa || data == 0xfe)) {
+			i8042_suppress_kbd_ack--;
+			dbg("Extra keyboard ACK - filtered out\n");
+			return true;
+		}
+	}
+
+	if (i8042_platform_filter && i8042_platform_filter(data, str, serio)) {
+		dbg("Filtered out by platfrom filter\n");
+		return true;
+	}
+
+	return false;
+}
+
 /*
  * i8042_interrupt() is the most important function in this driver -
  * it handles the interrupts from the i8042, and sends incoming bytes
@@ -377,13 +446,16 @@ static void i8042_stop(struct serio *serio)
 static irqreturn_t i8042_interrupt(int irq, void *dev_id)
 {
 	struct i8042_port *port;
+	struct serio *serio;
 	unsigned long flags;
 	unsigned char str, data;
 	unsigned int dfl;
 	unsigned int port_no;
+	bool filtered;
 	int ret = 1;
 
 	spin_lock_irqsave(&i8042_lock, flags);
+
 	str = i8042_read_status();
 	if (unlikely(~str & I8042_STR_OBF)) {
 		spin_unlock_irqrestore(&i8042_lock, flags);
@@ -391,8 +463,8 @@ static irqreturn_t i8042_interrupt(int irq, void *dev_id)
 		ret = 0;
 		goto out;
 	}
+
 	data = i8042_read_data();
-	spin_unlock_irqrestore(&i8042_lock, flags);
 
 	if (i8042_mux_present && (str & I8042_STR_AUXDATA)) {
 		static unsigned long last_transmit;
@@ -441,21 +513,19 @@ static irqreturn_t i8042_interrupt(int irq, void *dev_id)
 	}
 
 	port = &i8042_ports[port_no];
+	serio = port->exists ? port->serio : NULL;
 
 	dbg("%02x <- i8042 (interrupt, %d, %d%s%s)",
 	    data, port_no, irq,
 	    dfl & SERIO_PARITY ? ", bad parity" : "",
 	    dfl & SERIO_TIMEOUT ? ", timeout" : "");
 
-	if (unlikely(i8042_suppress_kbd_ack))
-		if (port_no == I8042_KBD_PORT_NO &&
-		    (data == 0xfa || data == 0xfe)) {
-			i8042_suppress_kbd_ack--;
-			goto out;
-		}
+	filtered = i8042_filter(data, str, serio);
+
+	spin_unlock_irqrestore(&i8042_lock, flags);
 
-	if (likely(port->exists))
-		serio_interrupt(port->serio, data, dfl);
+	if (likely(port->exists && !filtered))
+		serio_interrupt(serio, data, dfl);
 
  out:
 	return IRQ_RETVAL(ret);

drivers/input/serio/sa1111ps2.c

@@ -180,8 +180,8 @@ static void __devinit ps2_clear_input(struct ps2if *ps2if)
 	}
 }
 
-static inline unsigned int
-ps2_test_one(struct ps2if *ps2if, unsigned int mask)
+static unsigned int __devinit ps2_test_one(struct ps2if *ps2if,
+					   unsigned int mask)
 {
 	unsigned int val;
 
@@ -197,7 +197,7 @@ ps2_test_one(struct ps2if *ps2if, unsigned int mask)
  * Test the keyboard interface.  We basically check to make sure that
  * we can drive each line to the keyboard independently of each other.
  */
-static int __init ps2_test(struct ps2if *ps2if)
+static int __devinit ps2_test(struct ps2if *ps2if)
 {
 	unsigned int stat;
 	int ret = 0;
@@ -312,7 +312,7 @@ static int __devinit ps2_probe(struct sa1111_dev *dev)
 /*
  * Remove one device from this driver.
  */
-static int ps2_remove(struct sa1111_dev *dev)
+static int __devexit ps2_remove(struct sa1111_dev *dev)
 {
 	struct ps2if *ps2if = sa1111_get_drvdata(dev);
 
@@ -335,7 +335,7 @@ static struct sa1111_driver ps2_driver = {
 	},
 	.devid		= SA1111_DEVID_PS2,
 	.probe		= ps2_probe,
-	.remove		= ps2_remove,
+	.remove		= __devexit_p(ps2_remove),
 };
 
 static int __init ps2_init(void)

drivers/input/tablet/wacom.h

 /*
  * drivers/input/tablet/wacom.h
  *
- *  USB Wacom Graphire and Wacom Intuos tablet support
+ *  USB Wacom tablet support
  *
  *  Copyright (c) 2000-2004 Vojtech Pavlik	<vojtech@ucw.cz>
  *  Copyright (c) 2000 Andreas Bach Aaen	<abach@stofanet.dk>
@@ -69,6 +69,9 @@
  *      v1.49 (pc) - Added support for USB Tablet PC (0x90, 0x93, and 0x9A)
  *      v1.50 (pc) - Fixed a TabletPC touch bug in 2.6.28
  *      v1.51 (pc) - Added support for Intuos4
+ *      v1.52 (pc) - Query Wacom data upon system resume
+ *                 - add defines for features->type
+ *                 - add new devices (0x9F, 0xE2, and 0XE3)
  */
 
 /*
@@ -89,9 +92,9 @@
 /*
  * Version Information
  */
-#define DRIVER_VERSION "v1.51"
+#define DRIVER_VERSION "v1.52"
 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
-#define DRIVER_DESC "USB Wacom Graphire and Wacom Intuos tablet driver"
+#define DRIVER_DESC "USB Wacom tablet driver"
 #define DRIVER_LICENSE "GPL"
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
@@ -133,6 +136,8 @@ extern void input_dev_i4s(struct input_dev *input_dev, struct wacom_wac *wacom_w
 extern void input_dev_i4(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
+extern void input_dev_tpc(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
+extern void input_dev_tpc2fg(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern void input_dev_mo(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern void input_dev_bee(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
 extern __u16 wacom_le16_to_cpu(unsigned char *data);

drivers/input/tablet/wacom_sys.c

 /*
  * drivers/input/tablet/wacom_sys.c
  *
- *  USB Wacom Graphire and Wacom Intuos tablet support - system specific code
+ *  USB Wacom tablet support - system specific code
  */
 
 /*
@@ -209,6 +209,7 @@ void input_dev_g(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 	input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_LEFT) |
 		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
+		BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_STYLUS) |
 		BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_STYLUS2);
 	input_set_abs_params(input_dev, ABS_DISTANCE, 0, wacom_wac->features->distance_max, 0, 0);
 }
@@ -256,6 +257,7 @@ void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE) |
 		BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
+		BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_STYLUS) |
 		BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_TOOL_BRUSH) |
 		BIT_MASK(BTN_TOOL_PENCIL) | BIT_MASK(BTN_TOOL_AIRBRUSH) |
 		BIT_MASK(BTN_TOOL_LENS) | BIT_MASK(BTN_STYLUS2);
@@ -269,7 +271,8 @@ void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 
 void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
-	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_STYLUS2);
+	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
+		BIT_MASK(BTN_STYLUS) | BIT_MASK(BTN_STYLUS2);
 }
 
 void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
@@ -277,12 +280,32 @@ void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER);
 }
 
+void input_dev_tpc(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
+{
+	if (wacom_wac->features->device_type == BTN_TOOL_DOUBLETAP ||
+	    wacom_wac->features->device_type == BTN_TOOL_TRIPLETAP) {
+		input_set_abs_params(input_dev, ABS_RX, 0, wacom_wac->features->x_phy, 0, 0);
+		input_set_abs_params(input_dev, ABS_RY, 0, wacom_wac->features->y_phy, 0, 0);
+		input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_DOUBLETAP);
+	}
+}
+
+void input_dev_tpc2fg(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
+{
+	if (wacom_wac->features->device_type == BTN_TOOL_TRIPLETAP) {
+		input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_TRIPLETAP);
+		input_dev->evbit[0] |= BIT_MASK(EV_MSC);
+		input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
+	}
+}
+
 static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc,
-			   struct wacom_wac *wacom_wac)
+			   struct wacom_features *features)
 {
 	struct usb_device *dev = interface_to_usbdev(intf);
-	struct wacom_features *features = wacom_wac->features;
-	char limit = 0, result = 0;
+	char limit = 0;
+	/* result has to be defined as int for some devices */
+	int result = 0;
 	int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
 	unsigned char *report;
 
@@ -328,13 +351,24 @@ static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hi
 			case HID_USAGE_X:
 				if (usage == WCM_DESKTOP) {
 					if (finger) {
-						features->touch_x_max =
-							features->touch_y_max =
-							wacom_le16_to_cpu(&report[i + 3]);
+						features->device_type = BTN_TOOL_DOUBLETAP;
+						if (features->type == TABLETPC2FG) {
+							/* need to reset back */
+							features->pktlen = WACOM_PKGLEN_TPC2FG;
+							features->device_type = BTN_TOOL_TRIPLETAP;
+						}
 						features->x_max =
+							wacom_le16_to_cpu(&report[i + 3]);
+						features->x_phy =
 							wacom_le16_to_cpu(&report[i + 6]);
-						i += 7;
+						features->unit = report[i + 9];
+						features->unitExpo = report[i + 11];
+						i += 12;
 					} else if (pen) {
+						/* penabled only accepts exact bytes of data */
+						if (features->type == TABLETPC2FG)
+							features->pktlen = WACOM_PKGLEN_PENABLED;
+						features->device_type = BTN_TOOL_PEN;
 						features->x_max =
 							wacom_le16_to_cpu(&report[i + 3]);
 						i += 4;
@@ -350,10 +384,35 @@ static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hi
 				break;
 
 			case HID_USAGE_Y:
-				if (usage == WCM_DESKTOP)
+				if (usage == WCM_DESKTOP) {
+					if (finger) {
+						features->device_type = BTN_TOOL_DOUBLETAP;
+						if (features->type == TABLETPC2FG) {
+							/* need to reset back */
+							features->pktlen = WACOM_PKGLEN_TPC2FG;
+							features->device_type = BTN_TOOL_TRIPLETAP;
+							features->y_max =
+								wacom_le16_to_cpu(&report[i + 3]);
+							features->y_phy =
+								wacom_le16_to_cpu(&report[i + 6]);
+							i += 7;
+						} else {
+							features->y_max =
+								features->x_max;
+							features->y_phy =
+								wacom_le16_to_cpu(&report[i + 3]);
+							i += 4;
+						}
+					} else if (pen) {
+						/* penabled only accepts exact bytes of data */
+						if (features->type == TABLETPC2FG)
+							features->pktlen = WACOM_PKGLEN_PENABLED;
+						features->device_type = BTN_TOOL_PEN;
 						features->y_max =
 							wacom_le16_to_cpu(&report[i + 3]);
 						i += 4;
+					}
+				}
 				break;
 
 			case HID_USAGE_FINGER:
@@ -376,7 +435,7 @@ static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hi
 			break;
 
 		case HID_COLLECTION:
-			/* reset UsagePage ans Finger */
+			/* reset UsagePage and Finger */
 			finger = usage = 0;
 			break;
 		}
@@ -388,43 +447,92 @@ static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hi
 	return result;
 }
 
-static int wacom_query_tablet_data(struct usb_interface *intf)
+static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
 {
 	unsigned char *rep_data;
-	int limit = 0;
-	int error;
+	int limit = 0, report_id = 2;
+	int error = -ENOMEM;
 
 	rep_data = kmalloc(2, GFP_KERNEL);
 	if (!rep_data)
-		return -ENOMEM;
+		return error;
 
+	/* ask to report tablet data if it is 2FGT or not a Tablet PC */
+	if (features->device_type == BTN_TOOL_TRIPLETAP) {
+		do {
+			rep_data[0] = 3;
+			rep_data[1] = 4;
+			report_id = 3;
+			error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
+				report_id, rep_data, 2);
+			if (error >= 0)
+				error = usb_get_report(intf,
+					WAC_HID_FEATURE_REPORT, report_id,
+					rep_data, 3);
+		} while ((error < 0 || rep_data[1] != 4) && limit++ < 5);
+	} else if (features->type != TABLETPC && features->type != TABLETPC2FG) {
 		do {
 			rep_data[0] = 2;
 			rep_data[1] = 2;
 			error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
-					2, rep_data, 2);
+				report_id, rep_data, 2);
 			if (error >= 0)
 				error = usb_get_report(intf,
-						WAC_HID_FEATURE_REPORT, 2,
+					WAC_HID_FEATURE_REPORT, report_id,
 					rep_data, 2);
 		} while ((error < 0 || rep_data[1] != 2) && limit++ < 5);
+	}
 
 	kfree(rep_data);
 
 	return error < 0 ? error : 0;
 }
 
+static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
+		struct wacom_features *features)
+{
+	int error = 0;
+	struct usb_host_interface *interface = intf->cur_altsetting;
+	struct hid_descriptor *hid_desc;
+
+	/* default device to penabled */
+	features->device_type = BTN_TOOL_PEN;
+
+	/* only Tablet PCs need to retrieve the info */
+	if ((features->type != TABLETPC) && (features->type != TABLETPC2FG))
+		goto out;
+
+	if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
+		if (usb_get_extra_descriptor(&interface->endpoint[0],
+				HID_DEVICET_REPORT, &hid_desc)) {
+			printk("wacom: can not retrieve extra class descriptor\n");
+			error = 1;
+			goto out;
+		}
+	}
+	error = wacom_parse_hid(intf, hid_desc, features);
+	if (error)
+		goto out;
+
+	/* touch device found but size is not defined. use default */
+	if (features->device_type == BTN_TOOL_DOUBLETAP && !features->x_max) {
+		features->x_max = 1023;
+		features->y_max = 1023;
+	}
+
+ out:
+	return error;
+}
+
 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
 {
 	struct usb_device *dev = interface_to_usbdev(intf);
-	struct usb_host_interface *interface = intf->cur_altsetting;
 	struct usb_endpoint_descriptor *endpoint;
 	struct wacom *wacom;
 	struct wacom_wac *wacom_wac;
 	struct wacom_features *features;
 	struct input_dev *input_dev;
 	int error = -ENOMEM;
-	struct hid_descriptor *hid_desc;
 
 	wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
 	wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
@@ -432,7 +540,7 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
 	if (!wacom || !input_dev || !wacom_wac)
 		goto fail1;
 
-	wacom_wac->data = usb_buffer_alloc(dev, 10, GFP_KERNEL, &wacom->data_dma);
+	wacom_wac->data = usb_buffer_alloc(dev, WACOM_PKGLEN_MAX, GFP_KERNEL, &wacom->data_dma);
 	if (!wacom_wac->data)
 		goto fail1;
 
@@ -448,7 +556,7 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
 	strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
 
 	wacom_wac->features = features = get_wacom_feature(id);
-	BUG_ON(features->pktlen > 10);
+	BUG_ON(features->pktlen > WACOM_PKGLEN_MAX);
 
 	input_dev->name = wacom_wac->features->name;
 	wacom->wacom_wac = wacom_wac;
@@ -463,47 +571,24 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
 
 	endpoint = &intf->cur_altsetting->endpoint[0].desc;
 
-	/* Initialize touch_x_max and touch_y_max in case it is not defined */
-	if (wacom_wac->features->type == TABLETPC) {
-		features->touch_x_max = 1023;
-		features->touch_y_max = 1023;
-	} else {
-		features->touch_x_max = 0;
-		features->touch_y_max = 0;
-	}
-
-	/* TabletPC need to retrieve the physical and logical maximum from report descriptor */
-	if (wacom_wac->features->type == TABLETPC) {
-		if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
-			if (usb_get_extra_descriptor(&interface->endpoint[0],
-						     HID_DEVICET_REPORT, &hid_desc)) {
-				printk("wacom: can not retrive extra class descriptor\n");
-				goto fail2;
-			}
-		}
-		error = wacom_parse_hid(intf, hid_desc, wacom_wac);
+	/* Retrieve the physical and logical size for OEM devices */
+	error = wacom_retrieve_hid_descriptor(intf, features);
 	if (error)
 		goto fail2;
-	}
 
 	input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
-	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
-		BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS);
+	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOUCH);
+
 	input_set_abs_params(input_dev, ABS_X, 0, features->x_max, 4, 0);
 	input_set_abs_params(input_dev, ABS_Y, 0, features->y_max, 4, 0);
 	input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max, 0, 0);
-	if (features->type == TABLETPC) {
-		input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_DOUBLETAP);
-		input_set_abs_params(input_dev, ABS_RX, 0, features->touch_x_max, 4, 0);
-		input_set_abs_params(input_dev, ABS_RY, 0, features->touch_y_max, 4, 0);
-	}
 	input_dev->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
 
 	wacom_init_input_dev(input_dev, wacom_wac);
 
 	usb_fill_int_urb(wacom->irq, dev,
 			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
-			 wacom_wac->data, wacom_wac->features->pktlen,
+			 wacom_wac->data, features->pktlen,
 			 wacom_sys_irq, wacom, endpoint->bInterval);
 	wacom->irq->transfer_dma = wacom->data_dma;
 	wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
@@ -512,18 +597,14 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
 	if (error)
 		goto fail3;
 
-	/*
-	 * Ask the tablet to report tablet data if it is not a Tablet PC.
-	 * Note that if query fails it is not a hard failure.
-	 */
-	if (wacom_wac->features->type != TABLETPC)
-		wacom_query_tablet_data(intf);
+	/* Note that if query fails it is not a hard failure */
+	wacom_query_tablet_data(intf, features);
 
 	usb_set_intfdata(intf, wacom);
 	return 0;
 
  fail3:	usb_free_urb(wacom->irq);
- fail2:	usb_buffer_free(dev, 10, wacom_wac->data, wacom->data_dma);
+ fail2:	usb_buffer_free(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
  fail1:	input_free_device(input_dev);
 	kfree(wacom);
 	kfree(wacom_wac);
@@ -539,7 +620,7 @@ static void wacom_disconnect(struct usb_interface *intf)
 	usb_kill_urb(wacom->irq);
 	input_unregister_device(wacom->dev);
 	usb_free_urb(wacom->irq);
-	usb_buffer_free(interface_to_usbdev(intf), 10,
+	usb_buffer_free(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
 			wacom->wacom_wac->data, wacom->data_dma);
 	kfree(wacom->wacom_wac);
 	kfree(wacom);
@@ -559,12 +640,16 @@ static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
 static int wacom_resume(struct usb_interface *intf)
 {
 	struct wacom *wacom = usb_get_intfdata(intf);
+	struct wacom_features *features = wacom->wacom_wac->features;
 	int rv;
 
 	mutex_lock(&wacom->lock);
-	if (wacom->open)
+	if (wacom->open) {
 		rv = usb_submit_urb(wacom->irq, GFP_NOIO);
-	else
+		/* switch to wacom mode if needed */
+		if (!wacom_retrieve_hid_descriptor(intf, features))
+			wacom_query_tablet_data(intf, features);
+	} else
 		rv = 0;
 	mutex_unlock(&wacom->lock);
 

drivers/input/tablet/wacom_wac.h

@@ -9,12 +9,33 @@
 #ifndef WACOM_WAC_H
 #define WACOM_WAC_H
 
+/* maximum packet length for USB devices */
+#define WACOM_PKGLEN_MAX	32
+
+/* packet length for individual models */
+#define WACOM_PKGLEN_PENPRTN	 7
+#define WACOM_PKGLEN_GRAPHIRE	 8
+#define WACOM_PKGLEN_BBFUN 	 9
+#define WACOM_PKGLEN_INTUOS 	10
+#define WACOM_PKGLEN_PENABLED	 8
+#define WACOM_PKGLEN_TPC1FG	 5
+#define WACOM_PKGLEN_TPC2FG 	14
+
+/* device IDs */
 #define STYLUS_DEVICE_ID	0x02
 #define TOUCH_DEVICE_ID		0x03
 #define CURSOR_DEVICE_ID	0x06
 #define ERASER_DEVICE_ID	0x0A
 #define PAD_DEVICE_ID		0x0F
 
+/* wacom data packet report IDs */
+#define WACOM_REPORT_PENABLED		2
+#define WACOM_REPORT_INTUOSREAD		5
+#define WACOM_REPORT_INTUOSWRITE	6
+#define WACOM_REPORT_INTUOSPAD		12
+#define WACOM_REPORT_TPC1FG		6
+#define WACOM_REPORT_TPC2FG		13
+
 enum {
 	PENPARTNER = 0,
 	GRAPHIRE,
@@ -32,6 +53,7 @@ enum {
 	WACOM_BEE,
 	WACOM_MO,
 	TABLETPC,
+	TABLETPC2FG,
 	MAX_TYPE
 };
 
@@ -43,8 +65,11 @@ struct wacom_features {
 	int pressure_max;
 	int distance_max;
 	int type;
-	int touch_x_max;
-	int touch_y_max;
+	int device_type;
+	int x_phy;
+	int y_phy;
+	unsigned char unit;
+	unsigned char unitExpo;
 };
 
 struct wacom_wac {

drivers/input/touchscreen/Kconfig

@@ -450,6 +450,18 @@ config TOUCHSCREEN_USB_COMPOSITE
 	  To compile this driver as a module, choose M here: the
 	  module will be called usbtouchscreen.
 
+config TOUCHSCREEN_MC13783
+	tristate "Freescale MC13783 touchscreen input driver"
+	depends on MFD_MC13783
+	help
+	  Say Y here if you have an Freescale MC13783 PMIC on your
+	  board and want to use its touchscreen
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mc13783_ts.
+
 config TOUCHSCREEN_USB_EGALAX
 	default y
 	bool "eGalax, eTurboTouch CT-410/510/700 device support" if EMBEDDED

drivers/input/touchscreen/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_TOUCHSCREEN_EETI)		+= eeti_ts.o
 obj-$(CONFIG_TOUCHSCREEN_ELO)		+= elo.o
 obj-$(CONFIG_TOUCHSCREEN_FUJITSU)	+= fujitsu_ts.o
 obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o
+obj-$(CONFIG_TOUCHSCREEN_MC13783)	+= mc13783_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MCS5000)	+= mcs5000_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MIGOR)		+= migor_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MTOUCH)	+= mtouch.o

drivers/input/touchscreen/mc13783_ts.c

+/*
+ * Driver for the Freescale Semiconductor MC13783 touchscreen.
+ *
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2009 Sascha Hauer, Pengutronix
+ *
+ * Initial development of this code was funded by
+ * Phytec Messtechnik GmbH, http://www.phytec.de/
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#include <linux/platform_device.h>
+#include <linux/mfd/mc13783.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#define MC13783_TS_NAME	"mc13783-ts"
+
+#define DEFAULT_SAMPLE_TOLERANCE 300
+
+static unsigned int sample_tolerance = DEFAULT_SAMPLE_TOLERANCE;
+module_param(sample_tolerance, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(sample_tolerance,
+		"If the minimal and maximal value read out for one axis (out "
+		"of three) differ by this value (default: "
+		__stringify(DEFAULT_SAMPLE_TOLERANCE) ") or more, the reading "
+		"is supposed to be wrong and is discarded.  Set to 0 to "
+		"disable this check.");
+
+struct mc13783_ts_priv {
+	struct input_dev *idev;
+	struct mc13783 *mc13783;
+	struct delayed_work work;
+	struct workqueue_struct *workq;
+	unsigned int sample[4];
+};
+
+static irqreturn_t mc13783_ts_handler(int irq, void *data)
+{
+	struct mc13783_ts_priv *priv = data;
+
+	mc13783_ackirq(priv->mc13783, irq);
+
+	/*
+	 * Kick off reading coordinates. Note that if work happens already
+	 * be queued for future execution (it rearms itself) it will not
+	 * be rescheduled for immediate execution here. However the rearm
+	 * delay is HZ / 50 which is acceptable.
+	 */
+	queue_delayed_work(priv->workq, &priv->work, 0);
+
+	return IRQ_HANDLED;
+}
+
+#define sort3(a0, a1, a2) ({						\
+		if (a0 > a1)						\
+			swap(a0, a1);					\
+		if (a1 > a2)						\
+			swap(a1, a2);					\
+		if (a0 > a1)						\
+			swap(a0, a1);					\
+		})
+
+static void mc13783_ts_report_sample(struct mc13783_ts_priv *priv)
+{
+	struct input_dev *idev = priv->idev;
+	int x0, x1, x2, y0, y1, y2;
+	int cr0, cr1;
+
+	/*
+	 * the values are 10-bit wide only, but the two least significant
+	 * bits are for future 12 bit use and reading yields 0
+	 */
+	x0 = priv->sample[0] & 0xfff;
+	x1 = priv->sample[1] & 0xfff;
+	x2 = priv->sample[2] & 0xfff;
+	y0 = priv->sample[3] & 0xfff;
+	y1 = (priv->sample[0] >> 12) & 0xfff;
+	y2 = (priv->sample[1] >> 12) & 0xfff;
+	cr0 = (priv->sample[2] >> 12) & 0xfff;
+	cr1 = (priv->sample[3] >> 12) & 0xfff;
+
+	dev_dbg(&idev->dev,
+		"x: (% 4d,% 4d,% 4d) y: (% 4d, % 4d,% 4d) cr: (% 4d, % 4d)\n",
+		x0, x1, x2, y0, y1, y2, cr0, cr1);
+
+	sort3(x0, x1, x2);
+	sort3(y0, y1, y2);
+
+	cr0 = (cr0 + cr1) / 2;
+
+	if (!cr0 || !sample_tolerance ||
+			(x2 - x0 < sample_tolerance &&
+			 y2 - y0 < sample_tolerance)) {
+		/* report the median coordinate and average pressure */
+		if (cr0) {
+			input_report_abs(idev, ABS_X, x1);
+			input_report_abs(idev, ABS_Y, y1);
+
+			dev_dbg(&idev->dev, "report (%d, %d, %d)\n",
+					x1, y1, 0x1000 - cr0);
+			queue_delayed_work(priv->workq, &priv->work, HZ / 50);
+		} else
+			dev_dbg(&idev->dev, "report release\n");
+
+		input_report_abs(idev, ABS_PRESSURE,
+				cr0 ? 0x1000 - cr0 : cr0);
+		input_report_key(idev, BTN_TOUCH, cr0);
+		input_sync(idev);
+	} else
+		dev_dbg(&idev->dev, "discard event\n");
+}
+
+static void mc13783_ts_work(struct work_struct *work)
+{
+	struct mc13783_ts_priv *priv =
+		container_of(work, struct mc13783_ts_priv, work.work);
+	unsigned int mode = MC13783_ADC_MODE_TS;
+	unsigned int channel = 12;
+
+	if (mc13783_adc_do_conversion(priv->mc13783,
+				mode, channel, priv->sample) == 0)
+		mc13783_ts_report_sample(priv);
+}
+
+static int mc13783_ts_open(struct input_dev *dev)
+{
+	struct mc13783_ts_priv *priv = input_get_drvdata(dev);
+	int ret;
+
+	mc13783_lock(priv->mc13783);
+
+	mc13783_ackirq(priv->mc13783, MC13783_IRQ_TS);
+
+	ret = mc13783_irq_request(priv->mc13783, MC13783_IRQ_TS,
+		mc13783_ts_handler, MC13783_TS_NAME, priv);
+	if (ret)
+		goto out;
+
+	ret = mc13783_reg_rmw(priv->mc13783, MC13783_ADC0,
+			MC13783_ADC0_TSMOD_MASK, MC13783_ADC0_TSMOD0);
+	if (ret)
+		mc13783_irq_free(priv->mc13783, MC13783_IRQ_TS, priv);
+out:
+	mc13783_unlock(priv->mc13783);
+	return ret;
+}
+
+static void mc13783_ts_close(struct input_dev *dev)
+{
+	struct mc13783_ts_priv *priv = input_get_drvdata(dev);
+
+	mc13783_lock(priv->mc13783);
+	mc13783_reg_rmw(priv->mc13783, MC13783_ADC0,
+			MC13783_ADC0_TSMOD_MASK, 0);
+	mc13783_irq_free(priv->mc13783, MC13783_IRQ_TS, priv);
+	mc13783_unlock(priv->mc13783);
+
+	cancel_delayed_work_sync(&priv->work);
+}
+
+static int __init mc13783_ts_probe(struct platform_device *pdev)
+{
+	struct mc13783_ts_priv *priv;
+	struct input_dev *idev;
+	int ret = -ENOMEM;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	idev = input_allocate_device();
+	if (!priv || !idev)
+		goto err_free_mem;
+
+	INIT_DELAYED_WORK(&priv->work, mc13783_ts_work);
+	priv->mc13783 = dev_get_drvdata(pdev->dev.parent);
+	priv->idev = idev;
+
+	/*
+	 * We need separate workqueue because mc13783_adc_do_conversion
+	 * uses keventd and thus would deadlock.
+	 */
+	priv->workq = create_singlethread_workqueue("mc13783_ts");
+	if (!priv->workq)
+		goto err_free_mem;
+
+	idev->name = MC13783_TS_NAME;
+	idev->dev.parent = &pdev->dev;
+
+	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+	input_set_abs_params(idev, ABS_X, 0, 0xfff, 0, 0);
+	input_set_abs_params(idev, ABS_Y, 0, 0xfff, 0, 0);
+	input_set_abs_params(idev, ABS_PRESSURE, 0, 0xfff, 0, 0);
+
+	idev->open = mc13783_ts_open;
+	idev->close = mc13783_ts_close;
+
+	input_set_drvdata(idev, priv);
+
+	ret = input_register_device(priv->idev);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"register input device failed with %d\n", ret);
+		goto err_destroy_wq;
+	}
+
+	platform_set_drvdata(pdev, priv);
+	return 0;
+
+err_destroy_wq:
+	destroy_workqueue(priv->workq);
+err_free_mem:
+	input_free_device(idev);
+	kfree(priv);
+	return ret;
+}
+
+static int __devexit mc13783_ts_remove(struct platform_device *pdev)
+{
+	struct mc13783_ts_priv *priv = platform_get_drvdata(pdev);
+
+	platform_set_drvdata(pdev, NULL);
+
+	destroy_workqueue(priv->workq);
+	input_unregister_device(priv->idev);
+	kfree(priv);
+
+	return 0;
+}
+
+static struct platform_driver mc13783_ts_driver = {
+	.remove		= __devexit_p(mc13783_ts_remove),
+	.driver		= {
+		.owner	= THIS_MODULE,
+		.name	= MC13783_TS_NAME,
+	},
+};
+
+static int __init mc13783_ts_init(void)
+{
+	return platform_driver_probe(&mc13783_ts_driver, &mc13783_ts_probe);
+}
+module_init(mc13783_ts_init);
+
+static void __exit mc13783_ts_exit(void)
+{
+	platform_driver_unregister(&mc13783_ts_driver);
+}
+module_exit(mc13783_ts_exit);
+
+MODULE_DESCRIPTION("MC13783 input touchscreen driver");
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" MC13783_TS_NAME);

include/linux/i8042.h

@@ -39,6 +39,10 @@ void i8042_lock_chip(void);
 void i8042_unlock_chip(void);
 int i8042_command(unsigned char *param, int command);
 bool i8042_check_port_owner(const struct serio *);
+int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
+					struct serio *serio));
+int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
+				       struct serio *serio));
 
 #else
 
@@ -52,7 +56,7 @@ void i8042_unlock_chip(void)
 
 int i8042_command(unsigned char *param, int command)
 {
-	return -ENOSYS;
+	return -ENODEV;
 }
 
 bool i8042_check_port_owner(const struct serio *serio)
@@ -60,6 +64,18 @@ bool i8042_check_port_owner(const struct serio *serio)
 	return false;
 }
 
+int i8042_install_filter(bool (*filter)(unsigned char data, unsigned char str,
+					struct serio *serio))
+{
+	return -ENODEV;
+}
+
+int i8042_remove_filter(bool (*filter)(unsigned char data, unsigned char str,
+				       struct serio *serio))
+{
+	return -ENODEV;
+}
+
 #endif
 
 #endif