/* * 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	0x40static 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 },	{ { 0x63, 0x02, 0x0a },	0xf8, 0xf8, 0 },	{ { 0x63, 0x02, 0x14 },	0xf8, 0xf8, 0 },	{ { 0x63, 0x02, 0x28 },	0xf8, 0xf8, 0 },	{ { 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, 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 */};/* * 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 pt_regs *regs){	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;	input_regs(dev, regs);	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] & 0x08;		right = packet[2] & 0x10;		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 pt_regs *regs){	struct alps_data *priv = psmouse->private;	if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */		if (psmouse->pktcnt == 3) {			alps_process_packet(psmouse, regs);			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, regs);		return PSMOUSE_FULL_PACKET;	}	return PSMOUSE_GOOD_DATA;}static struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version){	struct ps2dev *ps2dev = &psmouse->ps2dev;	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]);	for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++);	*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;}static int alps_reconnect(struct psmouse *psmouse){	struct alps_data *priv = psmouse->private;	int version;	psmouse_reset(psmouse);	if (!(priv->i = alps_get_model(psmouse, &version)))		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 reenable hardware tapping\n");		return -1;	}	if (alps_absolute_mode(psmouse)) {		printk(KERN_ERR "alps.c: Failed to reenable absolute mode\n");		return -1;	}	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))		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;	int version;	psmouse->private = priv = kmalloc(sizeof(struct alps_data), GFP_KERNEL);	if (!priv)		goto init_fail;	memset(priv, 0, sizeof(struct alps_data));	if (!(priv->i = alps_get_model(psmouse, &version)))		goto init_fail;	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))		goto init_fail;	if (alps_tap_mode(psmouse, 1))		printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");	if (alps_absolute_mode(psmouse)) {		printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");		goto init_fail;	}	if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))		goto init_fail;	psmouse->dev.evbit[LONG(EV_KEY)] |= BIT(EV_KEY);	psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);	psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);	psmouse->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);	psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);	input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0);	input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0);	input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);	if (priv->i->flags & ALPS_WHEEL) {		psmouse->dev.evbit[LONG(EV_REL)] |= BIT(EV_REL);		psmouse->dev.relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL);	}	if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {		psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);		psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);	}	sprintf(priv->phys, "%s/input1", psmouse->ps2dev.serio->phys);	priv->dev2.phys = priv->phys;	priv->dev2.name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";	priv->dev2.id.bustype = BUS_I8042;	priv->dev2.id.vendor = 0x0002;	priv->dev2.id.product = PSMOUSE_ALPS;	priv->dev2.id.version = 0x0000;	priv->dev2.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);	priv->dev2.relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y);	priv->dev2.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);	input_register_device(&priv->dev2);	printk(KERN_INFO "input: %s on %s\n", priv->dev2.name, psmouse->ps2dev.serio->phys);	psmouse->protocol_handler = alps_process_byte;	psmouse->disconnect = alps_disconnect;	psmouse->reconnect = alps_reconnect;	psmouse->pktsize = 6;	return 0;init_fail:	kfree(priv);	return -1;}int alps_detect(struct psmouse *psmouse, int set_properties){	int version;	struct alps_model_info *model;	if (!(model = alps_get_model(psmouse, &version)))		return -1;	if (set_properties) {		psmouse->vendor = "ALPS";		psmouse->name = model->flags & ALPS_DUALPOINT ?				"DualPoint TouchPad" : "GlidePoint";		psmouse->model = version;	}	return 0;}