WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/drivers/input/mouse/synaptics.c

Rev	Author	Line No.	Line
523	mauro	1	/*
		2	* Synaptics TouchPad PS/2 mouse driver
		3	*
		4	* 2003 Dmitry Torokhov <dtor@mail.ru>
		5	* Added support for pass-through port
		6	*
		7	* 2003 Peter Osterlund <petero2@telia.com>
		8	* Ported to 2.5 input device infrastructure.
		9	*
		10	* Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
		11	* start merging tpconfig and gpm code to a xfree-input module
		12	* adding some changes and extensions (ex. 3rd and 4th button)
		13	*
		14	* Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
		15	* Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
		16	* code for the special synaptics commands (from the tpconfig-source)
		17	*
		18	* This program is free software; you can redistribute it and/or modify it
		19	* under the terms of the GNU General Public License version 2 as published by
		20	* the Free Software Foundation.
		21	*
		22	* Trademarks are the property of their respective owners.
		23	*/
		24
		25	#include <linuxcomp.h>
		26
		27	#include <linux/module.h>
		28	#include <linux/input.h>
		29	#include <linux/serio.h>
		30	#include "psmouse.h"
		31	#include "synaptics.h"
		32
		33	/*
		34	* The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
		35	* section 2.3.2, which says that they should be valid regardless of the
		36	* actual size of the sensor.
		37	*/
		38	#define XMIN_NOMINAL 1472
		39	#define XMAX_NOMINAL 5472
		40	#define YMIN_NOMINAL 1408
		41	#define YMAX_NOMINAL 4448
		42
		43	/*****************************************************************************
		44	* Synaptics communications functions
		45	****************************************************************************/
		46
		47	/*
		48	* Use the Synaptics extended ps/2 syntax to write a special command byte.
		49	* special command: 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr64)+(ss16)+(tt*4)+uu
		50	* is the command. A 0xF3 or 0xE9 must follow (see synaptics_send_cmd
		51	* and synaptics_mode_cmd)
		52	*/
		53	static int synaptics_special_cmd(struct psmouse *psmouse, unsigned char command)
		54	{
		55	int i;
		56
		57	if (psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11))
		58	return -1;
		59
		60	for (i = 6; i >= 0; i -= 2) {
		61	unsigned char d = (command >> i) & 3;
		62	if (psmouse_command(psmouse, &d, PSMOUSE_CMD_SETRES))
		63	return -1;
		64	}
		65
		66	return 0;
		67	}
		68
		69	/*
		70	* Send a command to the synpatics touchpad by special commands
		71	*/
		72	static int synaptics_send_cmd(struct psmouse psmouse, unsigned char c, unsigned char param)
		73	{
		74	if (synaptics_special_cmd(psmouse, c))
		75	return -1;
		76	if (psmouse_command(psmouse, param, PSMOUSE_CMD_GETINFO))
		77	return -1;
		78	return 0;
		79	}
		80
		81	/*
		82	* Set the synaptics touchpad mode byte by special commands
		83	*/
		84	static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
		85	{
		86	unsigned char param[1];
		87
		88	if (synaptics_special_cmd(psmouse, mode))
		89	return -1;
		90	param[0] = SYN_PS_SET_MODE2;
		91	if (psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE))
		92	return -1;
		93	return 0;
		94	}
		95
		96	static int synaptics_reset(struct psmouse *psmouse)
		97	{
		98	unsigned char r[2];
		99
		100	if (psmouse_command(psmouse, r, PSMOUSE_CMD_RESET_BAT))
		101	return -1;
		102	if (r[0] == PSMOUSE_RET_BAT && r[1] == PSMOUSE_RET_ID)
		103	return 0;
		104	return -1;
		105	}
		106
		107	/*
		108	* Read the model-id bytes from the touchpad
		109	* see also SYN_MODEL_* macros
		110	*/
		111	static int synaptics_model_id(struct psmouse *psmouse)
		112	{
		113	struct synaptics_data *priv = psmouse->private;
		114	unsigned char mi[3];
		115
		116	if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
		117	return -1;
		118	priv->model_id = (mi[0]<<16) \| (mi[1]<<8) \| mi[2];
		119	return 0;
		120	}
		121
		122	/*
		123	* Read the capability-bits from the touchpad
		124	* see also the SYN_CAP_* macros
		125	*/
		126	static int synaptics_capability(struct psmouse *psmouse)
		127	{
		128	struct synaptics_data *priv = psmouse->private;
		129	unsigned char cap[3];
		130
		131	if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
		132	return -1;
		133	priv->capabilities = (cap[0]<<16) \| (cap[1]<<8) \| cap[2];
		134	priv->ext_cap = 0;
		135	if (!SYN_CAP_VALID(priv->capabilities))
		136	return -1;
		137
		138	if (SYN_EXT_CAP_REQUESTS(priv->capabilities)) {
		139	if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
		140	printk(KERN_ERR "Synaptics claims to have extended capabilities,"
		141	" but I'm not able to read them.");
		142	} else
		143	priv->ext_cap = (cap[0]<<16) \| (cap[1]<<8) \| cap[2];
		144	}
		145	return 0;
		146	}
		147
		148	/*
		149	* Identify Touchpad
		150	* See also the SYN_ID_* macros
		151	*/
		152	static int synaptics_identify(struct psmouse *psmouse)
		153	{
		154	struct synaptics_data *priv = psmouse->private;
		155	unsigned char id[3];
		156
		157	if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
		158	return -1;
		159	priv->identity = (id[0]<<16) \| (id[1]<<8) \| id[2];
		160	if (SYN_ID_IS_SYNAPTICS(priv->identity))
		161	return 0;
		162	return -1;
		163	}
		164
		165	static void print_ident(struct synaptics_data *priv)
		166	{
		167	printk(KERN_INFO "Synaptics Touchpad, model: %ld\n", SYN_ID_MODEL(priv->identity));
		168	printk(KERN_INFO " Firmware: %ld.%ld\n", SYN_ID_MAJOR(priv->identity),
		169	SYN_ID_MINOR(priv->identity));
		170	if (SYN_MODEL_ROT180(priv->model_id))
		171	printk(KERN_INFO " 180 degree mounted touchpad\n");
		172	if (SYN_MODEL_PORTRAIT(priv->model_id))
		173	printk(KERN_INFO " portrait touchpad\n");
		174	printk(KERN_INFO " Sensor: %ld\n", SYN_MODEL_SENSOR(priv->model_id));
		175	if (SYN_MODEL_NEWABS(priv->model_id))
		176	printk(KERN_INFO " new absolute packet format\n");
		177	if (SYN_MODEL_PEN(priv->model_id))
		178	printk(KERN_INFO " pen detection\n");
		179
		180	if (SYN_CAP_EXTENDED(priv->capabilities)) {
		181	printk(KERN_INFO " Touchpad has extended capability bits\n");
		182	if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
		183	SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) <= 8)
		184	printk(KERN_INFO " -> %d multi-buttons, i.e. besides standard buttons\n",
		185	(int)(SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap)));
		186	else if (SYN_CAP_FOUR_BUTTON(priv->capabilities))
		187	printk(KERN_INFO " -> four buttons\n");
		188	if (SYN_CAP_MULTIFINGER(priv->capabilities))
		189	printk(KERN_INFO " -> multifinger detection\n");
		190	if (SYN_CAP_PALMDETECT(priv->capabilities))
		191	printk(KERN_INFO " -> palm detection\n");
		192	if (SYN_CAP_PASS_THROUGH(priv->capabilities))
		193	printk(KERN_INFO " -> pass-through port\n");
		194	}
		195	}
		196
		197	static int synaptics_query_hardware(struct psmouse *psmouse)
		198	{
		199	struct synaptics_data *priv = psmouse->private;
		200	int retries = 0;
		201	int mode;
		202
		203	while ((retries++ < 3) && synaptics_reset(psmouse))
		204	printk(KERN_ERR "synaptics reset failed\n");
		205
		206	if (synaptics_identify(psmouse))
		207	return -1;
		208	if (synaptics_model_id(psmouse))
		209	return -1;
		210	if (synaptics_capability(psmouse))
		211	return -1;
		212
		213	mode = SYN_BIT_ABSOLUTE_MODE \| SYN_BIT_HIGH_RATE;
		214	if (SYN_ID_MAJOR(priv->identity) >= 4)
		215	mode \|= SYN_BIT_DISABLE_GESTURE;
		216	if (SYN_CAP_EXTENDED(priv->capabilities))
		217	mode \|= SYN_BIT_W_MODE;
		218	if (synaptics_mode_cmd(psmouse, mode))
		219	return -1;
		220
		221	return 0;
		222	}
		223
		224	/*****************************************************************************
		225	* Synaptics pass-through PS/2 port support
		226	****************************************************************************/
		227	static int synaptics_pt_open(struct serio *port)
		228	{
		229	return 0;
		230	}
		231
		232	static void synaptics_pt_close(struct serio *port)
		233	{
		234	}
		235
		236	static int synaptics_pt_write(struct serio *port, unsigned char c)
		237	{
		238	struct psmouse *parent = port->driver;
		239	char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
		240
		241	if (synaptics_special_cmd(parent, c))
		242	return -1;
		243	if (psmouse_command(parent, &rate_param, PSMOUSE_CMD_SETRATE))
		244	return -1;
		245	return 0;
		246	}
		247
		248	static inline int synaptics_is_pt_packet(unsigned char *buf)
		249	{
		250	return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
		251	}
		252
		253	static void synaptics_pass_pt_packet(struct serio ptport, unsigned char packet)
		254	{
		255	struct psmouse *child = ptport->private;
		256
		257	if (child) {
		258	if (child->state == PSMOUSE_ACTIVATED) {
		259	serio_interrupt(ptport, packet[1], 0, NULL);
		260	serio_interrupt(ptport, packet[4], 0, NULL);
		261	serio_interrupt(ptport, packet[5], 0, NULL);
		262	if (child->type >= PSMOUSE_GENPS)
		263	serio_interrupt(ptport, packet[2], 0, NULL);
		264	} else if (child->state != PSMOUSE_IGNORE) {
		265	serio_interrupt(ptport, packet[1], 0, NULL);
		266	}
		267	}
		268	}
		269
		270	int synaptics_pt_init(struct psmouse *psmouse)
		271	{
		272	struct synaptics_data *priv = psmouse->private;
		273	struct serio *port;
		274	struct psmouse *child;
		275
		276	if (psmouse->type != PSMOUSE_SYNAPTICS)
		277	return -1;
		278	if (!SYN_CAP_EXTENDED(priv->capabilities))
		279	return -1;
		280	if (!SYN_CAP_PASS_THROUGH(priv->capabilities))
		281	return -1;
		282
		283	priv->ptport = port = kmalloc(sizeof(struct serio), GFP_KERNEL);
		284	if (!port) {
		285	printk(KERN_ERR "synaptics: not enough memory to allocate serio port\n");
		286	return -1;
		287	}
		288
		289	memset(port, 0, sizeof(struct serio));
		290	port->type = SERIO_PS_PSTHRU;
		291	port->name = "Synaptics pass-through";
		292	port->phys = "synaptics-pt/serio0";
		293	port->write = synaptics_pt_write;
		294	port->open = synaptics_pt_open;
		295	port->close = synaptics_pt_close;
		296	port->driver = psmouse;
		297
		298	printk(KERN_INFO "serio: %s port at %s\n", port->name, psmouse->phys);
		299	serio_register_slave_port(port);
		300
		301	/* adjust the touchpad to child's choice of protocol */
		302	child = port->private;
		303	if (child && child->type >= PSMOUSE_GENPS) {
		304	if (synaptics_mode_cmd(psmouse, (SYN_BIT_ABSOLUTE_MODE \|
		305	SYN_BIT_HIGH_RATE \|
		306	SYN_BIT_DISABLE_GESTURE \|
		307	SYN_BIT_FOUR_BYTE_CLIENT \|
		308	SYN_BIT_W_MODE)))
		309	printk(KERN_INFO "synaptics: failed to enable 4-byte guest protocol\n");
		310	}
		311
		312	return 0;
		313	}
		314
		315	/*****************************************************************************
		316	* Driver initialization/cleanup functions
		317	****************************************************************************/
		318
		319	static inline void set_abs_params(struct input_dev *dev, int axis, int min, int max, int fuzz, int flat)
		320	{
		321	dev->absmin[axis] = min;
		322	dev->absmax[axis] = max;
		323	dev->absfuzz[axis] = fuzz;
		324	dev->absflat[axis] = flat;
		325
		326	set_bit(axis, dev->absbit);
		327	}
		328
		329	static void set_input_params(struct input_dev dev, struct synaptics_data priv)
		330	{
		331	set_bit(EV_ABS, dev->evbit);
		332	set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
		333	set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
		334	set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
		335	set_bit(ABS_TOOL_WIDTH, dev->absbit);
		336
		337	set_bit(EV_KEY, dev->evbit);
		338	set_bit(BTN_TOUCH, dev->keybit);
		339	set_bit(BTN_TOOL_FINGER, dev->keybit);
		340	set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
		341	set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
		342
		343	set_bit(BTN_LEFT, dev->keybit);
		344	set_bit(BTN_RIGHT, dev->keybit);
		345	set_bit(BTN_FORWARD, dev->keybit);
		346	set_bit(BTN_BACK, dev->keybit);
		347	if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap)) {
		348	switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
		349	default:
		350	/*
		351	* if nExtBtn is greater than 8 it should be considered
		352	* invalid and treated as 0
		353	*/
		354	break;
		355	case 8:
		356	set_bit(BTN_7, dev->keybit);
		357	set_bit(BTN_6, dev->keybit);
		358	case 6:
		359	set_bit(BTN_5, dev->keybit);
		360	set_bit(BTN_4, dev->keybit);
		361	case 4:
		362	set_bit(BTN_3, dev->keybit);
		363	set_bit(BTN_2, dev->keybit);
		364	case 2:
		365	set_bit(BTN_1, dev->keybit);
		366	set_bit(BTN_0, dev->keybit);
		367	break;
		368	}
		369	}
		370
		371	clear_bit(EV_REL, dev->evbit);
		372	clear_bit(REL_X, dev->relbit);
		373	clear_bit(REL_Y, dev->relbit);
		374	}
		375
		376	int synaptics_init(struct psmouse *psmouse)
		377	{
		378	struct synaptics_data *priv;
		379
		380	#ifndef CONFIG_MOUSE_PS2_SYNAPTICS
		381	return -1;
		382	#endif
		383
		384	psmouse->private = priv = kmalloc(sizeof(struct synaptics_data), GFP_KERNEL);
		385	if (!priv)
		386	return -1;
		387	memset(priv, 0, sizeof(struct synaptics_data));
		388
		389	if (synaptics_query_hardware(psmouse)) {
		390	printk(KERN_ERR "Unable to query/initialize Synaptics hardware.\n");
		391	goto init_fail;
		392	}
		393
		394	print_ident(priv);
		395	set_input_params(&psmouse->dev, priv);
		396
		397	return 0;
		398
		399	init_fail:
		400	kfree(priv);
		401	return -1;
		402	}
		403
		404	void synaptics_disconnect(struct psmouse *psmouse)
		405	{
		406	struct synaptics_data *priv = psmouse->private;
		407
		408	if (psmouse->type == PSMOUSE_SYNAPTICS && priv) {
		409	synaptics_mode_cmd(psmouse, 0);
		410	if (priv->ptport) {
		411	serio_unregister_slave_port(priv->ptport);
		412	kfree(priv->ptport);
		413	}
		414	kfree(priv);
		415	}
		416	}
		417
		418	/*****************************************************************************
		419	* Functions to interpret the absolute mode packets
		420	****************************************************************************/
		421
		422	static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data priv, struct synaptics_hw_state hw)
		423	{
		424	hw->up = 0;
		425	hw->down = 0;
		426	hw->b0 = 0;
		427	hw->b1 = 0;
		428	hw->b2 = 0;
		429	hw->b3 = 0;
		430	hw->b4 = 0;
		431	hw->b5 = 0;
		432	hw->b6 = 0;
		433	hw->b7 = 0;
		434
		435	if (SYN_MODEL_NEWABS(priv->model_id)) {
		436	hw->x = (((buf[3] & 0x10) << 8) \|
		437	((buf[1] & 0x0f) << 8) \|
		438	buf[4]);
		439	hw->y = (((buf[3] & 0x20) << 7) \|
		440	((buf[1] & 0xf0) << 4) \|
		441	buf[5]);
		442
		443	hw->z = buf[2];
		444	hw->w = (((buf[0] & 0x30) >> 2) \|
		445	((buf[0] & 0x04) >> 1) \|
		446	((buf[3] & 0x04) >> 2));
		447
		448	hw->left = (buf[0] & 0x01) ? 1 : 0;
		449	hw->right = (buf[0] & 0x02) ? 1 : 0;
		450	if (SYN_CAP_EXTENDED(priv->capabilities) &&
		451	(SYN_CAP_FOUR_BUTTON(priv->capabilities))) {
		452	hw->up = ((buf[3] & 0x01)) ? 1 : 0;
		453	if (hw->left)
		454	hw->up = !hw->up;
		455	hw->down = ((buf[3] & 0x02)) ? 1 : 0;
		456	if (hw->right)
		457	hw->down = !hw->down;
		458	}
		459	if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
		460	((buf[3] & 2) ? !hw->right : hw->right)) {
		461	switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
		462	default:
		463	/*
		464	* if nExtBtn is greater than 8 it should be
		465	* considered invalid and treated as 0
		466	*/
		467	break;
		468	case 8:
		469	hw->b7 = ((buf[5] & 0x08)) ? 1 : 0;
		470	hw->b6 = ((buf[4] & 0x08)) ? 1 : 0;
		471	case 6:
		472	hw->b5 = ((buf[5] & 0x04)) ? 1 : 0;
		473	hw->b4 = ((buf[4] & 0x04)) ? 1 : 0;
		474	case 4:
		475	hw->b3 = ((buf[5] & 0x02)) ? 1 : 0;
		476	hw->b2 = ((buf[4] & 0x02)) ? 1 : 0;
		477	case 2:
		478	hw->b1 = ((buf[5] & 0x01)) ? 1 : 0;
		479	hw->b0 = ((buf[4] & 0x01)) ? 1 : 0;
		480	}
		481	}
		482	} else {
		483	hw->x = (((buf[1] & 0x1f) << 8) \| buf[2]);
		484	hw->y = (((buf[4] & 0x1f) << 8) \| buf[5]);
		485
		486	hw->z = (((buf[0] & 0x30) << 2) \| (buf[3] & 0x3F));
		487	hw->w = (((buf[1] & 0x80) >> 4) \| ((buf[0] & 0x04) >> 1));
		488
		489	hw->left = (buf[0] & 0x01) ? 1 : 0;
		490	hw->right = (buf[0] & 0x02) ? 1 : 0;
		491	}
		492	}
		493
		494	/*
		495	* called for each full received packet from the touchpad
		496	*/
		497	static void synaptics_process_packet(struct psmouse *psmouse)
		498	{
		499	struct input_dev *dev = &psmouse->dev;
		500	struct synaptics_data *priv = psmouse->private;
		501	struct synaptics_hw_state hw;
		502	int num_fingers;
		503	int finger_width;
		504
		505	synaptics_parse_hw_state(psmouse->packet, priv, &hw);
		506
		507	if (hw.z > 0) {
		508	num_fingers = 1;
		509	finger_width = 5;
		510	if (SYN_CAP_EXTENDED(priv->capabilities)) {
		511	switch (hw.w) {
		512	case 0 ... 1:
		513	if (SYN_CAP_MULTIFINGER(priv->capabilities))
		514	num_fingers = hw.w + 2;
		515	break;
		516	case 2:
		517	if (SYN_MODEL_PEN(priv->model_id))
		518	; /* Nothing, treat a pen as a single finger */
		519	break;
		520	case 4 ... 15:
		521	if (SYN_CAP_PALMDETECT(priv->capabilities))
		522	finger_width = hw.w;
		523	break;
		524	}
		525	}
		526	} else {
		527	num_fingers = 0;
		528	finger_width = 0;
		529	}
		530
		531	/* Post events */
		532	if (hw.z > 0) {
		533	input_report_abs(dev, ABS_X, hw.x);
		534	input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
		535	}
		536	input_report_abs(dev, ABS_PRESSURE, hw.z);
		537
		538	if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
		539	if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
		540
		541	input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
		542	input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
		543	input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
		544	input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
		545
		546	input_report_key(dev, BTN_LEFT, hw.left);
		547	input_report_key(dev, BTN_RIGHT, hw.right);
		548	input_report_key(dev, BTN_FORWARD, hw.up);
		549	input_report_key(dev, BTN_BACK, hw.down);
		550	if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
		551	switch(SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
		552	default:
		553	/*
		554	* if nExtBtn is greater than 8 it should be considered
		555	* invalid and treated as 0
		556	*/
		557	break;
		558	case 8:
		559	input_report_key(dev, BTN_7, hw.b7);
		560	input_report_key(dev, BTN_6, hw.b6);
		561	case 6:
		562	input_report_key(dev, BTN_5, hw.b5);
		563	input_report_key(dev, BTN_4, hw.b4);
		564	case 4:
		565	input_report_key(dev, BTN_3, hw.b3);
		566	input_report_key(dev, BTN_2, hw.b2);
		567	case 2:
		568	input_report_key(dev, BTN_1, hw.b1);
		569	input_report_key(dev, BTN_0, hw.b0);
		570	break;
		571	}
		572	input_sync(dev);
		573	}
		574
		575	void synaptics_process_byte(struct psmouse psmouse, struct pt_regs regs)
		576	{
		577	struct input_dev *dev = &psmouse->dev;
		578	struct synaptics_data *priv = psmouse->private;
		579	unsigned char data = psmouse->packet[psmouse->pktcnt - 1];
		580	int newabs = SYN_MODEL_NEWABS(priv->model_id);
		581
		582	input_regs(dev, regs);
		583
		584	switch (psmouse->pktcnt) {
		585	case 1:
		586	if (newabs ? ((data & 0xC8) != 0x80) : ((data & 0xC0) != 0xC0)) {
		587	printk(KERN_WARNING "Synaptics driver lost sync at 1st byte\n");
		588	goto bad_sync;
		589	}
		590	break;
		591	case 2:
		592	if (!newabs && ((data & 0x60) != 0x00)) {
		593	printk(KERN_WARNING "Synaptics driver lost sync at 2nd byte\n");
		594	goto bad_sync;
		595	}
		596	break;
		597	case 4:
		598	if (newabs ? ((data & 0xC8) != 0xC0) : ((data & 0xC0) != 0x80)) {
		599	printk(KERN_WARNING "Synaptics driver lost sync at 4th byte\n");
		600	goto bad_sync;
		601	}
		602	break;
		603	case 5:
		604	if (!newabs && ((data & 0x60) != 0x00)) {
		605	printk(KERN_WARNING "Synaptics driver lost sync at 5th byte\n");
		606	goto bad_sync;
		607	}
		608	break;
		609	default:
		610	if (psmouse->pktcnt < 6)
		611	break; /* Wait for full packet */
		612
		613	if (priv->out_of_sync) {
		614	priv->out_of_sync = 0;
		615	printk(KERN_NOTICE "Synaptics driver resynced.\n");
		616	}
		617
		618	if (priv->ptport && synaptics_is_pt_packet(psmouse->packet))
		619	synaptics_pass_pt_packet(priv->ptport, psmouse->packet);
		620	else
		621	synaptics_process_packet(psmouse);
		622
		623	psmouse->pktcnt = 0;
		624	break;
		625	}
		626	return;
		627
		628	bad_sync:
		629	priv->out_of_sync++;
		630	psmouse->pktcnt = 0;
		631	if (psmouse_resetafter > 0 && priv->out_of_sync == psmouse_resetafter) {
		632	psmouse->state = PSMOUSE_IGNORE;
		633	serio_rescan(psmouse->serio);
		634	}
		635	}

Subversion Repositories shark

(root)/shark/branches/xen/drivers/input/mouse/synaptics.c - Rev 1618