*  called for each full received packet from the touchpad */static void synaptics_process_packet(struct psmouse *psmouse){	struct input_dev *dev = &psmouse->dev;	struct synaptics_data *priv = psmouse->private;	struct synaptics_hw_state hw;	int num_fingers;	int finger_width;	int i;	synaptics_parse_hw_state(psmouse->packet, priv, &hw);	if (hw.scroll) {		priv->scroll += hw.scroll;		while (priv->scroll >= 4) {			input_report_key(dev, BTN_BACK, !hw.down);			input_sync(dev);			input_report_key(dev, BTN_BACK, hw.down);			input_sync(dev);			priv->scroll -= 4;		}		while (priv->scroll <= -4) {			input_report_key(dev, BTN_FORWARD, !hw.up);			input_sync(dev);			input_report_key(dev, BTN_FORWARD, hw.up);			input_sync(dev);			priv->scroll += 4;		}		return;	}	if (hw.z > 0) {		num_fingers = 1;		finger_width = 5;		if (SYN_CAP_EXTENDED(priv->capabilities)) {			switch (hw.w) {			case 0 ... 1:				if (SYN_CAP_MULTIFINGER(priv->capabilities))					num_fingers = hw.w + 2;				break;			case 2:				if (SYN_MODEL_PEN(priv->model_id))					;   /* Nothing, treat a pen as a single finger */				break;			case 4 ... 15:				if (SYN_CAP_PALMDETECT(priv->capabilities))					finger_width = hw.w;				break;			}		}	} else {		num_fingers = 0;		finger_width = 0;	}	/* Post events	 * BTN_TOUCH has to be first as mousedev relies on it when doing	 * absolute -> relative conversion	 */	if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);	if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);	if (hw.z > 0) {		input_report_abs(dev, ABS_X, hw.x);		input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);	}	input_report_abs(dev, ABS_PRESSURE, hw.z);	input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);	input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);	input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);	input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);	input_report_key(dev, BTN_LEFT, hw.left);	input_report_key(dev, BTN_RIGHT, hw.right);	if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))		input_report_key(dev, BTN_MIDDLE, hw.middle);	if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {		input_report_key(dev, BTN_FORWARD, hw.up);		input_report_key(dev, BTN_BACK, hw.down);	}	for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)		input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));	input_sync(dev);}static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type){	static unsigned char newabs_mask[]	= { 0xC8, 0x00, 0x00, 0xC8, 0x00 };	static unsigned char newabs_rel_mask[]	= { 0xC0, 0x00, 0x00, 0xC0, 0x00 };	static unsigned char newabs_rslt[]	= { 0x80, 0x00, 0x00, 0xC0, 0x00 };	static unsigned char oldabs_mask[]	= { 0xC0, 0x60, 0x00, 0xC0, 0x60 };	static unsigned char oldabs_rslt[]	= { 0xC0, 0x00, 0x00, 0x80, 0x00 };	if (idx < 0 || idx > 4)		return 0;	switch (pkt_type) {		case SYN_NEWABS:		case SYN_NEWABS_RELAXED:			return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];		case SYN_NEWABS_STRICT:			return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];		case SYN_OLDABS:			return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];		default:			printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);			return 0;	}}static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse){	int i;	for (i = 0; i < 5; i++)		if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {			printk(KERN_INFO "synaptics: using relaxed packet validation\n");			return SYN_NEWABS_RELAXED;		}	return SYN_NEWABS_STRICT;}static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse, struct pt_regs *regs){	struct input_dev *dev = &psmouse->dev;	struct synaptics_data *priv = psmouse->private;	input_regs(dev, regs);	if (psmouse->pktcnt >= 6) { /* Full packet received */		if (unlikely(priv->pkt_type == SYN_NEWABS))			priv->pkt_type = synaptics_detect_pkt_type(psmouse);		if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {			if (psmouse->ps2dev.serio->child)				synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);		} else			synaptics_process_packet(psmouse);		return PSMOUSE_FULL_PACKET;	}	return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?		PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;}/***************************************************************************** *	Driver initialization/cleanup functions ****************************************************************************/static void set_input_params(struct input_dev *dev, struct synaptics_data *priv){	int i;	set_bit(EV_ABS, dev->evbit);	input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);	input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);	set_bit(ABS_TOOL_WIDTH, dev->absbit);	set_bit(EV_KEY, dev->evbit);	set_bit(BTN_TOUCH, dev->keybit);	set_bit(BTN_TOOL_FINGER, dev->keybit);	set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);	set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);	set_bit(BTN_LEFT, dev->keybit);	set_bit(BTN_RIGHT, dev->keybit);	if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))		set_bit(BTN_MIDDLE, dev->keybit);	if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||	    SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {		set_bit(BTN_FORWARD, dev->keybit);		set_bit(BTN_BACK, dev->keybit);	}	for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)		set_bit(BTN_0 + i, dev->keybit);	clear_bit(EV_REL, dev->evbit);	clear_bit(REL_X, dev->relbit);	clear_bit(REL_Y, dev->relbit);}void synaptics_reset(struct psmouse *psmouse){	/* reset touchpad back to relative mode, gestures enabled */	synaptics_mode_cmd(psmouse, 0);}static void synaptics_disconnect(struct psmouse *psmouse){	synaptics_reset(psmouse);	kfree(psmouse->private);	psmouse->private = NULL;}static int synaptics_reconnect(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	struct synaptics_data old_priv = *priv;	if (synaptics_detect(psmouse, 0))		return -1;	if (synaptics_query_hardware(psmouse)) {		printk(KERN_ERR "Unable to query Synaptics hardware.\n");		return -1;	}	if (old_priv.identity != priv->identity ||	    old_priv.model_id != priv->model_id ||	    old_priv.capabilities != priv->capabilities ||	    old_priv.ext_cap != priv->ext_cap)		return -1;	if (synaptics_set_absolute_mode(psmouse)) {		printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");		return -1;	}	return 0;}int synaptics_detect(struct psmouse *psmouse, int set_properties){	struct ps2dev *ps2dev = &psmouse->ps2dev;	unsigned char param[4];	param[0] = 0;	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);	ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);	if (param[1] != 0x47)		return -1;	if (set_properties) {		psmouse->vendor = "Synaptics";		psmouse->name = "TouchPad";	}	return 0;}#if defined(__i386__)#include <linux/dmi.h>static struct dmi_system_id toshiba_dmi_table[] = {	{		.ident = "Toshiba Satellite",		.matches = {			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),			DMI_MATCH(DMI_PRODUCT_NAME , "Satellite"),		},	},	{		.ident = "Toshiba Dynabook",		.matches = {			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),			DMI_MATCH(DMI_PRODUCT_NAME , "dynabook"),		},	},	{ }};#endifint synaptics_init(struct psmouse *psmouse){	struct synaptics_data *priv;	psmouse->private = priv = kmalloc(sizeof(struct synaptics_data), GFP_KERNEL);	if (!priv)		return -1;	memset(priv, 0, sizeof(struct synaptics_data));	if (synaptics_query_hardware(psmouse)) {		printk(KERN_ERR "Unable to query Synaptics hardware.\n");		goto init_fail;	}	if (synaptics_set_absolute_mode(psmouse)) {		printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");		goto init_fail;	}	priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;	printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx\n",		SYN_ID_MODEL(priv->identity),		SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),		priv->model_id, priv->capabilities, priv->ext_cap);	set_input_params(&psmouse->dev, priv);	psmouse->protocol_handler = synaptics_process_byte;	psmouse->set_rate = synaptics_set_rate;	psmouse->disconnect = synaptics_disconnect;	psmouse->reconnect = synaptics_reconnect;	psmouse->pktsize = 6;	if (SYN_CAP_PASS_THROUGH(priv->capabilities))		synaptics_pt_create(psmouse);#if defined(__i386__)	/*	 * Toshiba's KBC seems to have trouble handling data from	 * Synaptics as full rate, switch to lower rate which is roughly	 * thye same as rate of standard PS/2 mouse.	 */	if (psmouse->rate >= 80 && dmi_check_system(toshiba_dmi_table)) {		printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",			dmi_get_system_info(DMI_PRODUCT_NAME));		psmouse->rate = 40;	}#endif	return 0; init_fail:	kfree(priv);	return -1;}