drivers/input/mouse/alps.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * ALPS touchpad PS/2 mouse driver
  *
  * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
  * 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>
  *
  * ALPS detection, tap switching and status querying info is taken from
  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
  *
  * 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/input.h>
 #include <linux/serio.h>
 #include <linux/libps2.h>

 #include "psmouse.h"
 #include "alps.h"

 #undef DEBUG
 #ifdef DEBUG
 #define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
 #else
 #define dbg(format, arg...) do {} while (0)
 #endif

 #define ALPS_DUALPOINT	0x01
 #define ALPS_WHEEL	0x02
 #define ALPS_FW_BK_1	0x04
 #define ALPS_4BTN	0x08
 #define ALPS_OLDPROTO	0x10
 #define ALPS_PASS	0x20
 #define ALPS_FW_BK_2	0x40

 static const struct alps_model_info alps_model_data[] = {
 	{ { 0x33, 0x02, 0x0a },	0x88, 0xf8, ALPS_OLDPROTO },		/* UMAX-530T */
 	{ { 0x53, 0x02, 0x0a },	0xf8, 0xf8, 0 },
 	{ { 0x53, 0x02, 0x14 },	0xf8, 0xf8, 0 },
 	{ { 0x60, 0x03, 0xc8 }, 0xf8, 0xf8, 0 },			/* HP ze1115 */
 	{ { 0x63, 0x02, 0x0a },	0xf8, 0xf8, 0 },
 	{ { 0x63, 0x02, 0x14 },	0xf8, 0xf8, 0 },
 	{ { 0x63, 0x02, 0x28 },	0xf8, 0xf8, ALPS_FW_BK_2 },		/* Fujitsu Siemens S6010 */
 	{ { 0x63, 0x02, 0x3c },	0x8f, 0x8f, ALPS_WHEEL },		/* Toshiba Satellite S2400-103 */
 	{ { 0x63, 0x02, 0x50 },	0xef, 0xef, ALPS_FW_BK_1 },		/* NEC Versa L320 */
 	{ { 0x63, 0x02, 0x64 },	0xf8, 0xf8, 0 },
 	{ { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS },		/* Dell Latitude D800 */
 	{ { 0x73, 0x00, 0x0a },	0xf8, 0xf8, ALPS_DUALPOINT },		/* ThinkPad R61 8918-5QG */
 	{ { 0x73, 0x02, 0x0a },	0xf8, 0xf8, 0 },
 	{ { 0x73, 0x02, 0x14 },	0xf8, 0xf8, ALPS_FW_BK_2 },		/* Ahtec Laptop */
 	{ { 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 */
 	{ { 0x73, 0x02, 0x50 }, 0xcf, 0xff, ALPS_FW_BK_1 } /* Dell Vostro 1400 */
 };

 /*
  * XXX - this entry is suspicious. First byte has zero lower nibble,
  * which is what a normal mouse would report. Also, the value 0x0e
  * isn't valid per PS/2 spec.
  */

 /*
  * ALPS abolute Mode - new format
  *
  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  * byte 2:  0   x10  x9   x8   x7    ?  fin  ges
  * byte 3:  0   y9   y8   y7    1    M    R    L
  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  *
  * ?'s can have different meanings on different models,
  * such as wheel rotation, extra buttons, stick buttons
  * on a dualpoint, etc.
  */

 static void alps_process_packet(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
 	unsigned char *packet = psmouse->packet;
 	struct input_dev *dev = psmouse->dev;
 	struct input_dev *dev2 = priv->dev2;
 	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 (priv->i->flags & ALPS_OLDPROTO) {
 		left = packet[2] & 0x10;
 		right = packet[2] & 0x08;
 		middle = 0;
 		x = packet[1] | ((packet[0] & 0x07) << 7);
 		y = packet[4] | ((packet[3] & 0x07) << 7);
 		z = packet[5];
 	} else {
 		left = packet[3] & 1;
 		right = packet[3] & 2;
 		middle = packet[3] & 4;
 		x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 		y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 		z = packet[5];
 	}

 	if (priv->i->flags & ALPS_FW_BK_1) {
 		back = packet[2] & 4;
 		forward = packet[0] & 0x10;
 	}

 	if (priv->i->flags & ALPS_FW_BK_2) {
 		back = packet[3] & 4;
 		forward = packet[2] & 4;
 		if ((middle = forward && back))
 			forward = back = 0;
 	}

 	ges = packet[2] & 1;
 	fin = packet[2] & 2;

 	input_report_key(dev, BTN_LEFT, left);
 	input_report_key(dev, BTN_RIGHT, right);
 	input_report_key(dev, BTN_MIDDLE, middle);

 	if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
 		input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 		input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 		input_sync(dev);
 		input_sync(dev2);
 		return;
 	}

 	/* Convert hardware tap to a reasonable Z value */
 	if (ges && !fin) z = 40;

 	/*
 	 * A "tap and drag" operation is reported by the hardware as a transition
 	 * from (!fin && ges) to (fin && ges). This should be translated to the
 	 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 	 */
 	if (ges && fin && !priv->prev_fin) {
 		input_report_abs(dev, ABS_X, x);
 		input_report_abs(dev, ABS_Y, y);
 		input_report_abs(dev, ABS_PRESSURE, 0);
 		input_report_key(dev, BTN_TOOL_FINGER, 0);
 		input_sync(dev);
 	}
 	priv->prev_fin = fin;

 	if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
 	if (z < 25) input_report_key(dev, BTN_TOUCH, 0);

 	if (z > 0) {
 		input_report_abs(dev, ABS_X, x);
 		input_report_abs(dev, ABS_Y, y);
 	}

 	input_report_abs(dev, ABS_PRESSURE, z);
 	input_report_key(dev, BTN_TOOL_FINGER, z > 0);

 	if (priv->i->flags & ALPS_WHEEL)
 		input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));

 	if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 		input_report_key(dev, BTN_FORWARD, forward);
 		input_report_key(dev, BTN_BACK, back);
 	}

 	input_sync(dev);
 }

 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;

 	if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 		if (psmouse->pktcnt == 3) {
 			alps_process_packet(psmouse);
 			return PSMOUSE_FULL_PACKET;
 		}
 		return PSMOUSE_GOOD_DATA;
 	}

 	if ((psmouse->packet[0] & priv->i->mask0) != priv->i->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))
 		return PSMOUSE_BAD_DATA;

 	if (psmouse->pktcnt == 6) {
 		alps_process_packet(psmouse);
 		return PSMOUSE_FULL_PACKET;
 	}

 	return PSMOUSE_GOOD_DATA;
 }

 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 {
 	struct ps2dev *ps2dev = &psmouse->ps2dev;
 	static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 	unsigned char param[4];
 	int i;

 	/*
 	 * First try "E6 report".
 	 * ALPS should return 0,0,10 or 0,0,100
 	 */
 	param[0] = 0;
 	if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 		return NULL;

 	param[0] = param[1] = param[2] = 0xff;
 	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 		return NULL;

 	dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

 	if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 		return NULL;

 	/*
 	 * Now try "E7 report". Allowed responses are in
 	 * alps_model_data[].signature
 	 */
 	param[0] = 0;
 	if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 	    ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 		return NULL;

 	param[0] = param[1] = param[2] = 0xff;
 	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 		return NULL;

 	dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

 	if (version) {
 		for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
 			/* empty */;
 		*version = (param[0] << 8) | (param[1] << 4) | i;
 	}

 	for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 		if (!memcmp(param, alps_model_data[i].signature,
 			    sizeof(alps_model_data[i].signature)))
 			return alps_model_data + i;

 	return NULL;
 }

 /*
  * For DualPoint devices select the device that should respond to
  * subsequent commands. It looks like glidepad is behind stickpointer,
  * I'd thought it would be other way around...
  */
 static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
 {
 	struct ps2dev *ps2dev = &psmouse->ps2dev;
 	int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;

 	if (ps2_command(ps2dev, NULL, cmd) ||
 	    ps2_command(ps2dev, NULL, cmd) ||
 	    ps2_command(ps2dev, NULL, cmd) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 		return -1;

 	/* we may get 3 more bytes, just ignore them */
 	ps2_drain(ps2dev, 3, 100);

 	return 0;
 }

 static int alps_absolute_mode(struct psmouse *psmouse)
 {
 	struct ps2dev *ps2dev = &psmouse->ps2dev;

 	/* Try ALPS magic knock - 4 disable before enable */
 	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 		return -1;

 	/*
 	 * Switch mouse to poll (remote) mode so motion data will not
 	 * get in our way
 	 */
 	return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 }

 static int alps_get_status(struct psmouse *psmouse, char *param)
 {
 	struct ps2dev *ps2dev = &psmouse->ps2dev;

 	/* Get status: 0xF5 0xF5 0xF5 0xE9 */
 	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 		return -1;

 	dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

 	return 0;
 }

 /*
  * Turn touchpad tapping on or off. The sequences are:
  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
  * My guess that 0xE9 (GetInfo) is here as a sync point.
  * For models that also have stickpointer (DualPoints) its tapping
  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
  * we don't fiddle with it.
  */
 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 {
 	struct ps2dev *ps2dev = &psmouse->ps2dev;
 	int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 	unsigned char tap_arg = enable ? 0x0A : 0x00;
 	unsigned char param[4];

 	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 	    ps2_command(ps2dev, &tap_arg, cmd))
 		return -1;

 	if (alps_get_status(psmouse, param))
 		return -1;

 	return 0;
 }

 /*
  * alps_poll() - poll the touchpad for current motion packet.
  * Used in resync.
  */
 static int alps_poll(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;
 	unsigned char buf[6];
 	int poll_failed;

 	if (priv->i->flags & ALPS_PASS)
 		alps_passthrough_mode(psmouse, 1);

 	poll_failed = ps2_command(&psmouse->ps2dev, buf,
 				  PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;

 	if (priv->i->flags & ALPS_PASS)
 		alps_passthrough_mode(psmouse, 0);

 	if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
 		return -1;

 	if ((psmouse->badbyte & 0xc8) == 0x08) {
 /*
  * Poll the track stick ...
  */
 		if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
 			return -1;
 	}

 	memcpy(psmouse->packet, buf, sizeof(buf));
 	return 0;
 }

 static int alps_hw_init(struct psmouse *psmouse, int *version)
 {
 	struct alps_data *priv = psmouse->private;

 	priv->i = alps_get_model(psmouse, version);
 	if (!priv->i)
 		return -1;

 	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
 		return -1;

 	if (alps_tap_mode(psmouse, 1)) {
 		printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 		return -1;
 	}

 	if (alps_absolute_mode(psmouse)) {
 		printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 		return -1;
 	}

 	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
 		return -1;

 	/* ALPS needs stream mode, otherwise it won't report any data */
 	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
 		printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
 		return -1;
 	}

 	return 0;
 }

 static int alps_reconnect(struct psmouse *psmouse)
 {
 	psmouse_reset(psmouse);

 	if (alps_hw_init(psmouse, NULL))
 		return -1;

 	return 0;
 }

 static void alps_disconnect(struct psmouse *psmouse)
 {
 	struct alps_data *priv = psmouse->private;

 	psmouse_reset(psmouse);
 	input_unregister_device(priv->dev2);
 	kfree(priv);
 }

 int alps_init(struct psmouse *psmouse)
 {
 	struct alps_data *priv;
 	struct input_dev *dev1 = psmouse->dev, *dev2;
 	int version;

 	priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 	dev2 = input_allocate_device();
 	if (!priv || !dev2)
 		goto init_fail;

 	priv->dev2 = dev2;
 	psmouse->private = priv;

 	if (alps_hw_init(psmouse, &version))
 		goto init_fail;

 	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);
 	dev1->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
 		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);

 	dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
 	input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
 	input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
 	input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);

 	if (priv->i->flags & ALPS_WHEEL) {
 		dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
 		dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
 	}

 	if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 		dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
 		dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
 	}

 	snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
 	dev2->phys = priv->phys;
 	dev2->name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 	dev2->id.bustype = BUS_I8042;
 	dev2->id.vendor  = 0x0002;
 	dev2->id.product = PSMOUSE_ALPS;
 	dev2->id.version = 0x0000;

 	dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 	dev2->relbit[BIT_WORD(REL_X)] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 	dev2->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
 		BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);

 	if (input_register_device(priv->dev2))
 		goto init_fail;

 	psmouse->protocol_handler = alps_process_byte;
 	psmouse->poll = alps_poll;
 	psmouse->disconnect = alps_disconnect;
 	psmouse->reconnect = alps_reconnect;
 	psmouse->pktsize = 6;

 	/* We are having trouble resyncing ALPS touchpads so disable it for now */
 	psmouse->resync_time = 0;

 	return 0;

 init_fail:
 	psmouse_reset(psmouse);
 	input_free_device(dev2);
 	kfree(priv);
 	psmouse->private = NULL;
 	return -1;
 }

 int alps_detect(struct psmouse *psmouse, int set_properties)
 {
 	int version;
 	const struct alps_model_info *model;

 	model = alps_get_model(psmouse, &version);
 	if (!model)
 		return -1;

 	if (set_properties) {
 		psmouse->vendor = "ALPS";
 		psmouse->name = model->flags & ALPS_DUALPOINT ?
 				"DualPoint TouchPad" : "GlidePoint";
 		psmouse->model = version;
 	}
 	return 0;
 }
	/*
	* ALPS touchpad PS/2 mouse driver
	*
	* Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
	* 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>
	*
	* ALPS detection, tap switching and status querying info is taken from
	* tpconfig utility (by C. Scott Ananian and Bruce Kall).
	*
	* 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/input.h>
	#include <linux/serio.h>
	#include <linux/libps2.h>

	#include "psmouse.h"
	#include "alps.h"

	#undef DEBUG
	#ifdef DEBUG
	#define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
	#else
	#define dbg(format, arg...) do {} while (0)
	#endif

	#define ALPS_DUALPOINT 0x01
	#define ALPS_WHEEL 0x02
	#define ALPS_FW_BK_1 0x04
	#define ALPS_4BTN 0x08
	#define ALPS_OLDPROTO 0x10
	#define ALPS_PASS 0x20
	#define ALPS_FW_BK_2 0x40

	static const struct alps_model_info alps_model_data[] = {
	{ { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO }, /* UMAX-530T */
	{ { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
	{ { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
	{ { 0x60, 0x03, 0xc8 }, 0xf8, 0xf8, 0 }, /* HP ze1115 */
	{ { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
	{ { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
	{ { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Fujitsu Siemens S6010 */
	{ { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */
	{ { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 }, /* NEC Versa L320 */
	{ { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
	{ { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS }, /* Dell Latitude D800 */
	{ { 0x73, 0x00, 0x0a }, 0xf8, 0xf8, ALPS_DUALPOINT }, /* ThinkPad R61 8918-5QG */
	{ { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
	{ { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Ahtec Laptop */
	{ { 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 */
	{ { 0x73, 0x02, 0x50 }, 0xcf, 0xff, ALPS_FW_BK_1 } /* Dell Vostro 1400 */
	};

	/*
	* XXX - this entry is suspicious. First byte has zero lower nibble,
	* which is what a normal mouse would report. Also, the value 0x0e
	* isn't valid per PS/2 spec.
	*/

	/*
	* ALPS abolute Mode - new format
	*
	* byte 0: 1 ? ? ? 1 ? ? ?
	* byte 1: 0 x6 x5 x4 x3 x2 x1 x0
	* byte 2: 0 x10 x9 x8 x7 ? fin ges
	* byte 3: 0 y9 y8 y7 1 M R L
	* byte 4: 0 y6 y5 y4 y3 y2 y1 y0
	* byte 5: 0 z6 z5 z4 z3 z2 z1 z0
	*
	* ?'s can have different meanings on different models,
	* such as wheel rotation, extra buttons, stick buttons
	* on a dualpoint, etc.
	*/

	static void alps_process_packet(struct psmouse *psmouse)
	{
	struct alps_data *priv = psmouse->private;
	unsigned char *packet = psmouse->packet;
	struct input_dev *dev = psmouse->dev;
	struct input_dev *dev2 = priv->dev2;
	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 (priv->i->flags & ALPS_OLDPROTO) {
	left = packet[2] & 0x10;
	right = packet[2] & 0x08;
	middle = 0;
	x = packet[1] \| ((packet[0] & 0x07) << 7);
	y = packet[4] \| ((packet[3] & 0x07) << 7);
	z = packet[5];
	} else {
	left = packet[3] & 1;
	right = packet[3] & 2;
	middle = packet[3] & 4;
	x = packet[1] \| ((packet[2] & 0x78) << (7 - 3));
	y = packet[4] \| ((packet[3] & 0x70) << (7 - 4));
	z = packet[5];
	}

	if (priv->i->flags & ALPS_FW_BK_1) {
	back = packet[2] & 4;
	forward = packet[0] & 0x10;
	}

	if (priv->i->flags & ALPS_FW_BK_2) {
	back = packet[3] & 4;
	forward = packet[2] & 4;
	if ((middle = forward && back))
	forward = back = 0;
	}

	ges = packet[2] & 1;
	fin = packet[2] & 2;

	input_report_key(dev, BTN_LEFT, left);
	input_report_key(dev, BTN_RIGHT, right);
	input_report_key(dev, BTN_MIDDLE, middle);

	if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
	input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
	input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
	input_sync(dev);
	input_sync(dev2);
	return;
	}

	/* Convert hardware tap to a reasonable Z value */
	if (ges && !fin) z = 40;

	/*
	* A "tap and drag" operation is reported by the hardware as a transition
	* from (!fin && ges) to (fin && ges). This should be translated to the
	* sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
	*/
	if (ges && fin && !priv->prev_fin) {
	input_report_abs(dev, ABS_X, x);
	input_report_abs(dev, ABS_Y, y);
	input_report_abs(dev, ABS_PRESSURE, 0);
	input_report_key(dev, BTN_TOOL_FINGER, 0);
	input_sync(dev);
	}
	priv->prev_fin = fin;

	if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
	if (z < 25) input_report_key(dev, BTN_TOUCH, 0);

	if (z > 0) {
	input_report_abs(dev, ABS_X, x);
	input_report_abs(dev, ABS_Y, y);
	}

	input_report_abs(dev, ABS_PRESSURE, z);
	input_report_key(dev, BTN_TOOL_FINGER, z > 0);

	if (priv->i->flags & ALPS_WHEEL)
	input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));

	if (priv->i->flags & (ALPS_FW_BK_1 \| ALPS_FW_BK_2)) {
	input_report_key(dev, BTN_FORWARD, forward);
	input_report_key(dev, BTN_BACK, back);
	}

	input_sync(dev);
	}

	static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
	{
	struct alps_data *priv = psmouse->private;

	if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
	if (psmouse->pktcnt == 3) {
	alps_process_packet(psmouse);
	return PSMOUSE_FULL_PACKET;
	}
	return PSMOUSE_GOOD_DATA;
	}

	if ((psmouse->packet[0] & priv->i->mask0) != priv->i->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))
	return PSMOUSE_BAD_DATA;

	if (psmouse->pktcnt == 6) {
	alps_process_packet(psmouse);
	return PSMOUSE_FULL_PACKET;
	}

	return PSMOUSE_GOOD_DATA;
	}

	static const struct alps_model_info alps_get_model(struct psmouse psmouse, int *version)
	{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
	unsigned char param[4];
	int i;

	/*
	* First try "E6 report".
	* ALPS should return 0,0,10 or 0,0,100
	*/
	param[0] = 0;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
	return NULL;

	param[0] = param[1] = param[2] = 0xff;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
	return NULL;

	dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

	if (param[0] != 0 \|\| param[1] != 0 \|\| (param[2] != 10 && param[2] != 100))
	return NULL;

	/*
	* Now try "E7 report". Allowed responses are in
	* alps_model_data[].signature
	*/
	param[0] = 0;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21))
	return NULL;

	param[0] = param[1] = param[2] = 0xff;
	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
	return NULL;

	dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

	if (version) {
	for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
	/* empty */;
	*version = (param[0] << 8) \| (param[1] << 4) \| i;
	}

	for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
	if (!memcmp(param, alps_model_data[i].signature,
	sizeof(alps_model_data[i].signature)))
	return alps_model_data + i;

	return NULL;
	}

	/*
	* For DualPoint devices select the device that should respond to
	* subsequent commands. It looks like glidepad is behind stickpointer,
	* I'd thought it would be other way around...
	*/
	static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
	{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;

	if (ps2_command(ps2dev, NULL, cmd) \|\|
	ps2_command(ps2dev, NULL, cmd) \|\|
	ps2_command(ps2dev, NULL, cmd) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
	return -1;

	/* we may get 3 more bytes, just ignore them */
	ps2_drain(ps2dev, 3, 100);

	return 0;
	}

	static int alps_absolute_mode(struct psmouse *psmouse)
	{
	struct ps2dev *ps2dev = &psmouse->ps2dev;

	/* Try ALPS magic knock - 4 disable before enable */
	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
	return -1;

	/*
	* Switch mouse to poll (remote) mode so motion data will not
	* get in our way
	*/
	return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
	}

	static int alps_get_status(struct psmouse psmouse, char param)
	{
	struct ps2dev *ps2dev = &psmouse->ps2dev;

	/* Get status: 0xF5 0xF5 0xF5 0xE9 */
	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
	return -1;

	dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);

	return 0;
	}

	/*
	* Turn touchpad tapping on or off. The sequences are:
	* 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
	* 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
	* My guess that 0xE9 (GetInfo) is here as a sync point.
	* For models that also have stickpointer (DualPoints) its tapping
	* is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14\|0x0A) but
	* we don't fiddle with it.
	*/
	static int alps_tap_mode(struct psmouse *psmouse, int enable)
	{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
	unsigned char tap_arg = enable ? 0x0A : 0x00;
	unsigned char param[4];

	if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) \|\|
	ps2_command(ps2dev, &tap_arg, cmd))
	return -1;

	if (alps_get_status(psmouse, param))
	return -1;

	return 0;
	}

	/*
	* alps_poll() - poll the touchpad for current motion packet.
	* Used in resync.
	*/
	static int alps_poll(struct psmouse *psmouse)
	{
	struct alps_data *priv = psmouse->private;
	unsigned char buf[6];
	int poll_failed;

	if (priv->i->flags & ALPS_PASS)
	alps_passthrough_mode(psmouse, 1);

	poll_failed = ps2_command(&psmouse->ps2dev, buf,
	PSMOUSE_CMD_POLL \| (psmouse->pktsize << 8)) < 0;

	if (priv->i->flags & ALPS_PASS)
	alps_passthrough_mode(psmouse, 0);

	if (poll_failed \|\| (buf[0] & priv->i->mask0) != priv->i->byte0)
	return -1;

	if ((psmouse->badbyte & 0xc8) == 0x08) {
	/*
	* Poll the track stick ...
	*/
	if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL \| (3 << 8)))
	return -1;
	}

	memcpy(psmouse->packet, buf, sizeof(buf));
	return 0;
	}

	static int alps_hw_init(struct psmouse psmouse, int version)
	{
	struct alps_data *priv = psmouse->private;

	priv->i = alps_get_model(psmouse, version);
	if (!priv->i)
	return -1;

	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
	return -1;

	if (alps_tap_mode(psmouse, 1)) {
	printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
	return -1;
	}

	if (alps_absolute_mode(psmouse)) {
	printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
	return -1;
	}

	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
	return -1;

	/* ALPS needs stream mode, otherwise it won't report any data */
	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
	printk(KERN_ERR "alps.c: Failed to enable stream mode\n");
	return -1;
	}

	return 0;
	}

	static int alps_reconnect(struct psmouse *psmouse)
	{
	psmouse_reset(psmouse);

	if (alps_hw_init(psmouse, NULL))
	return -1;

	return 0;
	}

	static void alps_disconnect(struct psmouse *psmouse)
	{
	struct alps_data *priv = psmouse->private;

	psmouse_reset(psmouse);
	input_unregister_device(priv->dev2);
	kfree(priv);
	}

	int alps_init(struct psmouse *psmouse)
	{
	struct alps_data *priv;
	struct input_dev dev1 = psmouse->dev, dev2;
	int version;

	priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
	dev2 = input_allocate_device();
	if (!priv \|\| !dev2)
	goto init_fail;

	priv->dev2 = dev2;
	psmouse->private = priv;

	if (alps_hw_init(psmouse, &version))
	goto init_fail;

	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);
	dev1->keybit[BIT_WORD(BTN_LEFT)] \|= BIT_MASK(BTN_LEFT) \|
	BIT_MASK(BTN_MIDDLE) \| BIT_MASK(BTN_RIGHT);

	dev1->evbit[BIT_WORD(EV_ABS)] \|= BIT_MASK(EV_ABS);
	input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
	input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
	input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);

	if (priv->i->flags & ALPS_WHEEL) {
	dev1->evbit[BIT_WORD(EV_REL)] \|= BIT_MASK(EV_REL);
	dev1->relbit[BIT_WORD(REL_WHEEL)] \|= BIT_MASK(REL_WHEEL);
	}

	if (priv->i->flags & (ALPS_FW_BK_1 \| ALPS_FW_BK_2)) {
	dev1->keybit[BIT_WORD(BTN_FORWARD)] \|= BIT_MASK(BTN_FORWARD);
	dev1->keybit[BIT_WORD(BTN_BACK)] \|= BIT_MASK(BTN_BACK);
	}

	snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
	dev2->phys = priv->phys;
	dev2->name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
	dev2->id.bustype = BUS_I8042;
	dev2->id.vendor = 0x0002;
	dev2->id.product = PSMOUSE_ALPS;
	dev2->id.version = 0x0000;

	dev2->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REL);
	dev2->relbit[BIT_WORD(REL_X)] \|= BIT_MASK(REL_X) \| BIT_MASK(REL_Y);
	dev2->keybit[BIT_WORD(BTN_LEFT)] \|= BIT_MASK(BTN_LEFT) \|
	BIT_MASK(BTN_MIDDLE) \| BIT_MASK(BTN_RIGHT);

	if (input_register_device(priv->dev2))
	goto init_fail;

	psmouse->protocol_handler = alps_process_byte;
	psmouse->poll = alps_poll;
	psmouse->disconnect = alps_disconnect;
	psmouse->reconnect = alps_reconnect;
	psmouse->pktsize = 6;

	/* We are having trouble resyncing ALPS touchpads so disable it for now */
	psmouse->resync_time = 0;

	return 0;

	init_fail:
	psmouse_reset(psmouse);
	input_free_device(dev2);
	kfree(priv);
	psmouse->private = NULL;
	return -1;
	}

	int alps_detect(struct psmouse *psmouse, int set_properties)
	{
	int version;
	const struct alps_model_info *model;

	model = alps_get_model(psmouse, &version);
	if (!model)
	return -1;

	if (set_properties) {
	psmouse->vendor = "ALPS";
	psmouse->name = model->flags & ALPS_DUALPOINT ?
	"DualPoint TouchPad" : "GlidePoint";
	psmouse->model = version;
	}
	return 0;
	}