/* * Synaptics TouchPad PS/2 mouse driver * *   2003 Dmitry Torokhov <dtor@mail.ru> *     Added support for pass-through port. Special thanks to Peter Berg Larsen *     for explaining various Synaptics quirks. * *   2003 Peter Osterlund <petero2@telia.com> *     Ported to 2.5 input device infrastructure. * *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch> *     start merging tpconfig and gpm code to a xfree-input module *     adding some changes and extensions (ex. 3rd and 4th button) * *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu> *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com> *     code for the special synaptics commands (from the tpconfig-source) * * 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. * * Trademarks are the property of their respective owners. */ #include <linux/module.h>#include <linux/delay.h>#include <linux/dmi.h>#include <linux/input/mt.h>#include <linux/serio.h>#include <linux/libps2.h>#include <linux/slab.h>#include "psmouse.h"#include "synaptics.h" /* * The x/y limits are taken from the Synaptics TouchPad interfacing Guide, * section 2.3.2, which says that they should be valid regardless of the * actual size of the sensor. * Note that newer firmware allows querying device for maximum useable * coordinates. */#define XMIN 0#define XMAX 6143#define YMIN 0#define YMAX 6143#define XMIN_NOMINAL 1472#define XMAX_NOMINAL 5472#define YMIN_NOMINAL 1408#define YMAX_NOMINAL 4448 /* Size in bits of absolute position values reported by the hardware */#define ABS_POS_BITS 13 /* * These values should represent the absolute maximum value that will * be reported for a positive position value. Some Synaptics firmware * uses this value to indicate a finger near the edge of the touchpad * whose precise position cannot be determined. * * At least one touchpad is known to report positions in excess of this * value which are actually negative values truncated to the 13-bit * reporting range. These values have never been observed to be lower * than 8184 (i.e. -8), so we treat all values greater than 8176 as * negative and any other value as positive. */#define X_MAX_POSITIVE 8176#define Y_MAX_POSITIVE 8176 /***************************************************************************** *	Stuff we need even when we do not want native Synaptics support ****************************************************************************/ /* * Set the synaptics touchpad mode byte by special commands */static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode){	unsigned char param[1]; 	if (psmouse_sliced_command(psmouse, mode))		return -1;	param[0] = SYN_PS_SET_MODE2;	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))		return -1;	return 0;} int synaptics_detect(struct psmouse *psmouse, bool 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 -ENODEV; 	if (set_properties) {		psmouse->vendor = "Synaptics";		psmouse->name = "TouchPad";	} 	return 0;} void synaptics_reset(struct psmouse *psmouse){	/* reset touchpad back to relative mode, gestures enabled */	synaptics_mode_cmd(psmouse, 0);} #ifdef CONFIG_MOUSE_PS2_SYNAPTICS /***************************************************************************** *	Synaptics communications functions ****************************************************************************/ /* * Synaptics touchpads report the y coordinate from bottom to top, which is * opposite from what userspace expects. * This function is used to invert y before reporting. */static int synaptics_invert_y(int y){	return YMAX_NOMINAL + YMIN_NOMINAL - y;} /* * Send a command to the synpatics touchpad by special commands */static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param){	if (psmouse_sliced_command(psmouse, c))		return -1;	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))		return -1;	return 0;} /* * Read the model-id bytes from the touchpad * see also SYN_MODEL_* macros */static int synaptics_model_id(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	unsigned char mi[3]; 	if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))		return -1;	priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];	return 0;} /* * Read the board id from the touchpad * The board id is encoded in the "QUERY MODES" response */static int synaptics_board_id(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	unsigned char bid[3]; 	if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))		return -1;	priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];	return 0;} /* * Read the firmware id from the touchpad */static int synaptics_firmware_id(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	unsigned char fwid[3]; 	if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))		return -1;	priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];	return 0;} /* * Read the capability-bits from the touchpad * see also the SYN_CAP_* macros */static int synaptics_capability(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	unsigned char cap[3]; 	if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))		return -1;	priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];	priv->ext_cap = priv->ext_cap_0c = 0; 	/*	 * Older firmwares had submodel ID fixed to 0x47	 */	if (SYN_ID_FULL(priv->identity) < 0x705 &&	    SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {		return -1;	} 	/*	 * Unless capExtended is set the rest of the flags should be ignored	 */	if (!SYN_CAP_EXTENDED(priv->capabilities))		priv->capabilities = 0; 	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {			psmouse_warn(psmouse,				     "device claims to have extended capabilities, but I'm not able to read them.\n");		} else {			priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2]; 			/*			 * if nExtBtn is greater than 8 it should be considered			 * invalid and treated as 0			 */			if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)				priv->ext_cap &= 0xff0fff;		}	} 	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {			psmouse_warn(psmouse,				     "device claims to have extended capability 0x0c, but I'm not able to read it.\n");		} else {			priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];		}	} 	return 0;} /* * Identify Touchpad * See also the SYN_ID_* macros */static int synaptics_identify(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	unsigned char id[3]; 	if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))		return -1;	priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];	if (SYN_ID_IS_SYNAPTICS(priv->identity))		return 0;	return -1;} /* * Read touchpad resolution and maximum reported coordinates * Resolution is left zero if touchpad does not support the query */static int synaptics_resolution(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	unsigned char resp[3]; 	if (SYN_ID_MAJOR(priv->identity) < 4)		return 0; 	if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {		if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {			priv->x_res = resp[0]; /* x resolution in units/mm */			priv->y_res = resp[2]; /* y resolution in units/mm */		}	} 	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&	    SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {			psmouse_warn(psmouse,				     "device claims to have max coordinates query, but I'm not able to read it.\n");		} else {			priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);			priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);		}	} 	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&	    SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {			psmouse_warn(psmouse,				     "device claims to have min coordinates query, but I'm not able to read it.\n");		} else {			priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);			priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);		}	} 	return 0;} static int synaptics_query_hardware(struct psmouse *psmouse){	if (synaptics_identify(psmouse))		return -1;	if (synaptics_model_id(psmouse))		return -1;	if (synaptics_firmware_id(psmouse))		return -1;	if (synaptics_board_id(psmouse))		return -1;	if (synaptics_capability(psmouse))		return -1;	if (synaptics_resolution(psmouse))		return -1; 	return 0;} static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse){	static unsigned char param = 0xc8;	struct synaptics_data *priv = psmouse->private; 	if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||	      SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))		return 0; 	if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))		return -1; 	if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))		return -1; 	/* Advanced gesture mode also sends multi finger data */	priv->capabilities |= BIT(1); 	return 0;} static int synaptics_set_mode(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private; 	priv->mode = 0;	if (priv->absolute_mode)		priv->mode |= SYN_BIT_ABSOLUTE_MODE;	if (priv->disable_gesture)		priv->mode |= SYN_BIT_DISABLE_GESTURE;	if (psmouse->rate >= 80)		priv->mode |= SYN_BIT_HIGH_RATE;	if (SYN_CAP_EXTENDED(priv->capabilities))		priv->mode |= SYN_BIT_W_MODE; 	if (synaptics_mode_cmd(psmouse, priv->mode))		return -1; 	if (priv->absolute_mode &&	    synaptics_set_advanced_gesture_mode(psmouse)) {		psmouse_err(psmouse, "Advanced gesture mode init failed.\n");		return -1;	} 	return 0;} static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate){	struct synaptics_data *priv = psmouse->private; 	if (rate >= 80) {		priv->mode |= SYN_BIT_HIGH_RATE;		psmouse->rate = 80;	} else {		priv->mode &= ~SYN_BIT_HIGH_RATE;		psmouse->rate = 40;	} 	synaptics_mode_cmd(psmouse, priv->mode);} /***************************************************************************** *	Synaptics pass-through PS/2 port support ****************************************************************************/static int synaptics_pt_write(struct serio *serio, unsigned char c){	struct psmouse *parent = serio_get_drvdata(serio->parent);	char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 	if (psmouse_sliced_command(parent, c))		return -1;	if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))		return -1;	return 0;} static int synaptics_pt_start(struct serio *serio){	struct psmouse *parent = serio_get_drvdata(serio->parent);	struct synaptics_data *priv = parent->private; 	serio_pause_rx(parent->ps2dev.serio);	priv->pt_port = serio;	serio_continue_rx(parent->ps2dev.serio); 	return 0;} static void synaptics_pt_stop(struct serio *serio){	struct psmouse *parent = serio_get_drvdata(serio->parent);	struct synaptics_data *priv = parent->private; 	serio_pause_rx(parent->ps2dev.serio);	priv->pt_port = NULL;	serio_continue_rx(parent->ps2dev.serio);} static int synaptics_is_pt_packet(unsigned char *buf){	return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;} static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet){	struct psmouse *child = serio_get_drvdata(ptport); 	if (child && child->state == PSMOUSE_ACTIVATED) {		serio_interrupt(ptport, packet[1], 0);		serio_interrupt(ptport, packet[4], 0);		serio_interrupt(ptport, packet[5], 0);		if (child->pktsize == 4)			serio_interrupt(ptport, packet[2], 0);	} else		serio_interrupt(ptport, packet[1], 0);} static void synaptics_pt_activate(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	struct psmouse *child = serio_get_drvdata(priv->pt_port); 	/* adjust the touchpad to child's choice of protocol */	if (child) {		if (child->pktsize == 4)			priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;		else			priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 		if (synaptics_mode_cmd(psmouse, priv->mode))			psmouse_warn(psmouse,				     "failed to switch guest protocol\n");	}} static void synaptics_pt_create(struct psmouse *psmouse){	struct serio *serio; 	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);	if (!serio) {		psmouse_err(psmouse,			    "not enough memory for pass-through port\n");		return;	} 	serio->id.type = SERIO_PS_PSTHRU;	strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));	strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));	serio->write = synaptics_pt_write;	serio->start = synaptics_pt_start;	serio->stop = synaptics_pt_stop;	serio->parent = psmouse->ps2dev.serio; 	psmouse->pt_activate = synaptics_pt_activate; 	psmouse_info(psmouse, "serio: %s port at %s\n",		     serio->name, psmouse->phys);	serio_register_port(serio);} /***************************************************************************** *	Functions to interpret the absolute mode packets ****************************************************************************/ static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,				   int sgm, int agm){	state->count = count;	state->sgm = sgm;	state->agm = agm;} static void synaptics_parse_agm(const unsigned char buf[],

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