/* * 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/input.h>#include <linux/serio.h>#include <linux/libps2.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. */#define XMIN_NOMINAL 1472#define XMAX_NOMINAL 5472#define YMIN_NOMINAL 1408#define YMAX_NOMINAL 4448/***************************************************************************** *	Synaptics communications functions ****************************************************************************//* * 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;}/* * 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;}/* * 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 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 = 0;	if (!SYN_CAP_VALID(priv->capabilities))		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)) {			printk(KERN_ERR "Synaptics claims to have extended capabilities,"			       " but I'm not able to read them.");		} 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;		}	}	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;}static int synaptics_query_hardware(struct psmouse *psmouse){	int retries = 0;	while ((retries++ < 3) && psmouse_reset(psmouse))		printk(KERN_ERR "synaptics reset failed\n");	if (synaptics_identify(psmouse))		return -1;	if (synaptics_model_id(psmouse))		return -1;	if (synaptics_capability(psmouse))		return -1;	return 0;}static int synaptics_set_absolute_mode(struct psmouse *psmouse){	struct synaptics_data *priv = psmouse->private;	priv->mode = SYN_BIT_ABSOLUTE_MODE;	if (SYN_ID_MAJOR(priv->identity) >= 4)		priv->mode |= SYN_BIT_DISABLE_GESTURE;	if (SYN_CAP_EXTENDED(priv->capabilities))		priv->mode |= SYN_BIT_W_MODE;	if (synaptics_mode_cmd(psmouse, priv->mode))		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 inline 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 serio *ptport = psmouse->ps2dev.serio->child;	struct psmouse *child = serio_get_drvdata(ptport);	struct synaptics_data *priv = psmouse->private;	/* 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))			printk(KERN_INFO "synaptics: 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) {		printk(KERN_ERR "synaptics: not enough memory to allocate 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->parent = psmouse->ps2dev.serio;	psmouse->pt_activate = synaptics_pt_activate;	printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);	serio_register_port(serio);}/***************************************************************************** *	Functions to interpret the absolute mode packets ****************************************************************************/static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw){	memset(hw, 0, sizeof(struct synaptics_hw_state));	if (SYN_MODEL_NEWABS(priv->model_id)) {		hw->x = (((buf[3] & 0x10) << 8) |			 ((buf[1] & 0x0f) << 8) |			 buf[4]);		hw->y = (((buf[3] & 0x20) << 7) |			 ((buf[1] & 0xf0) << 4) |			 buf[5]);		hw->z = buf[2];		hw->w = (((buf[0] & 0x30) >> 2) |			 ((buf[0] & 0x04) >> 1) |			 ((buf[3] & 0x04) >> 2));		hw->left  = (buf[0] & 0x01) ? 1 : 0;		hw->right = (buf[0] & 0x02) ? 1 : 0;		if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {			hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;			if (hw->w == 2)				hw->scroll = (signed char)(buf[1]);		}		if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {			hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;			hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;		}		if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&		    ((buf[0] ^ buf[3]) & 0x02)) {			switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {			default:				/*				 * if nExtBtn is greater than 8 it should be				 * considered invalid and treated as 0				 */				break;			case 8:				hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;				hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;			case 6:				hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;				hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;			case 4:				hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;				hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;			case 2:				hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;				hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;			}		}	} else {		hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);		hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);		hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));		hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));		hw->left  = (buf[0] & 0x01) ? 1 : 0;		hw->right = (buf[0] & 0x02) ? 1 : 0;	}}/* *  called for each full received packet from the touchpad */static void synaptics_process_packet(struct psmouse *psmouse){