synaptics.c

优龙2410linux2.6.8内核源代码

/*
 * Synaptics TouchPad PS/2 mouse driver
 *
 *   2003 Dmitry Torokhov <[e-mail]>
 *     Added support for pass-through port. Special thanks to Peter Berg Larsen
 *     for explaining various Synaptics quirks.
 *
 *   2003 Peter Osterlund <[e-mail]>
 *     Ported to 2.5 input device infrastructure.
 *
 *   Copyright (C) 2001 Stefan Gmeiner <[e-mail]>
 *     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 <[e-mail]>
 *   Copyright (c) 1998-2000 Bruce Kalk <[e-mail]>
 *     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 "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 (psmouse_command(psmouse, 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 (psmouse_command(psmouse, 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 void print_ident(struct synaptics_data *priv)
{
	printk(KERN_INFO "Synaptics Touchpad, model: %ld\n", SYN_ID_MODEL(priv->identity));
	printk(KERN_INFO " Firmware: %ld.%ld\n", SYN_ID_MAJOR(priv->identity),
	       SYN_ID_MINOR(priv->identity));
	if (SYN_MODEL_ROT180(priv->model_id))
		printk(KERN_INFO " 180 degree mounted touchpad\n");
	if (SYN_MODEL_PORTRAIT(priv->model_id))
		printk(KERN_INFO " portrait touchpad\n");
	printk(KERN_INFO " Sensor: %ld\n", SYN_MODEL_SENSOR(priv->model_id));
	if (SYN_MODEL_NEWABS(priv->model_id))
		printk(KERN_INFO " new absolute packet format\n");
	if (SYN_MODEL_PEN(priv->model_id))
		printk(KERN_INFO " pen detection\n");

	if (SYN_CAP_EXTENDED(priv->capabilities)) {
		printk(KERN_INFO " Touchpad has extended capability bits\n");
		if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
			printk(KERN_INFO " -> %d multi-buttons, i.e. besides standard buttons\n",
			       (int)(SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap)));
		if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
			printk(KERN_INFO " -> middle button\n");
		if (SYN_CAP_FOUR_BUTTON(priv->capabilities))
			printk(KERN_INFO " -> four buttons\n");
		if (SYN_CAP_MULTIFINGER(priv->capabilities))
			printk(KERN_INFO " -> multifinger detection\n");
		if (SYN_CAP_PALMDETECT(priv->capabilities))
			printk(KERN_INFO " -> palm detection\n");
		if (SYN_CAP_PASS_THROUGH(priv->capabilities))
			printk(KERN_INFO " -> pass-through port\n");
	}
}

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_mode(struct psmouse *psmouse, int mode)
{
	struct synaptics_data *priv = psmouse->private;

	mode |= SYN_BIT_ABSOLUTE_MODE;
	if (psmouse_rate >= 80)
		mode |= SYN_BIT_HIGH_RATE;
	if (SYN_ID_MAJOR(priv->identity) >= 4)
		mode |= SYN_BIT_DISABLE_GESTURE;
	if (SYN_CAP_EXTENDED(priv->capabilities))
		mode |= SYN_BIT_W_MODE;
	if (synaptics_mode_cmd(psmouse, mode))
		return -1;

	return 0;
}

/*****************************************************************************
 *	Synaptics pass-through PS/2 port support
 ****************************************************************************/
static int synaptics_pt_write(struct serio *port, unsigned char c)
{
	struct psmouse *parent = port->driver;
	char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */

	if (psmouse_sliced_command(parent, c))
		return -1;
	if (psmouse_command(parent, &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 = ptport->private;

	if (child) {
		if (child->state == PSMOUSE_ACTIVATED) {
			serio_interrupt(ptport, packet[1], 0, NULL);
			serio_interrupt(ptport, packet[4], 0, NULL);
			serio_interrupt(ptport, packet[5], 0, NULL);
			if (child->type >= PSMOUSE_GENPS)
				serio_interrupt(ptport, packet[2], 0, NULL);
		} else if (child->state != PSMOUSE_IGNORE) {
			serio_interrupt(ptport, packet[1], 0, NULL);
		}
	}
}

static void synaptics_pt_activate(struct psmouse *psmouse)
{
	struct psmouse *child = psmouse->ptport->serio.private;

	/* adjust the touchpad to child's choice of protocol */
	if (child && child->type >= PSMOUSE_GENPS) {
		if (synaptics_set_mode(psmouse, SYN_BIT_FOUR_BYTE_CLIENT))
			printk(KERN_INFO "synaptics: failed to enable 4-byte guest protocol\n");
	}
}

static void synaptics_pt_create(struct psmouse *psmouse)
{
	struct psmouse_ptport *port;

	psmouse->ptport = port = kmalloc(sizeof(struct psmouse_ptport), GFP_KERNEL);
	if (!port) {
		printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
		return;
	}

	memset(port, 0, sizeof(struct psmouse_ptport));

	port->serio.type = SERIO_PS_PSTHRU;
	port->serio.name = "Synaptics pass-through";
	port->serio.phys = "synaptics-pt/serio0";
	port->serio.write = synaptics_pt_write;
	port->serio.driver = psmouse;

	port->activate = synaptics_pt_activate;
}

/*****************************************************************************
 *	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 (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {