2014-09-13 08:24:47 +08:00
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/*
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* Focaltech TouchPad PS/2 mouse driver
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*
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* Copyright (c) 2014 Red Hat Inc.
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2014-12-30 01:26:35 +08:00
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* Copyright (c) 2014 Mathias Gottschlag <mgottschlag@gmail.com>
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2014-09-13 08:24:47 +08:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Red Hat authors:
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*
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* Hans de Goede <hdegoede@redhat.com>
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*/
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#include <linux/device.h>
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#include <linux/libps2.h>
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2014-12-30 01:26:35 +08:00
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#include <linux/input/mt.h>
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#include <linux/serio.h>
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#include <linux/slab.h>
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2014-09-13 08:24:47 +08:00
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#include "psmouse.h"
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2014-12-30 01:26:35 +08:00
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#include "focaltech.h"
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2014-09-13 08:24:47 +08:00
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static const char * const focaltech_pnp_ids[] = {
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"FLT0101",
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"FLT0102",
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"FLT0103",
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NULL
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};
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2014-12-30 01:26:35 +08:00
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/*
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* Even if the kernel is built without support for Focaltech PS/2 touchpads (or
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* when the real driver fails to recognize the device), we still have to detect
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* them in order to avoid further detection attempts confusing the touchpad.
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* This way it at least works in PS/2 mouse compatibility mode.
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*/
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2014-09-13 08:24:47 +08:00
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int focaltech_detect(struct psmouse *psmouse, bool set_properties)
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{
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if (!psmouse_matches_pnp_id(psmouse, focaltech_pnp_ids))
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return -ENODEV;
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if (set_properties) {
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psmouse->vendor = "FocalTech";
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2014-12-30 01:26:35 +08:00
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psmouse->name = "FocalTech Touchpad";
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2014-09-13 08:24:47 +08:00
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}
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return 0;
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}
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2014-12-30 01:26:35 +08:00
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static void focaltech_reset(struct psmouse *psmouse)
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2014-09-13 08:24:47 +08:00
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{
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ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
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psmouse_reset(psmouse);
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2014-12-30 01:26:35 +08:00
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}
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#ifdef CONFIG_MOUSE_PS2_FOCALTECH
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/*
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* Packet types - the numbers are not consecutive, so we might be missing
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* something here.
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*/
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#define FOC_TOUCH 0x3 /* bitmap of active fingers */
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#define FOC_ABS 0x6 /* absolute position of one finger */
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#define FOC_REL 0x9 /* relative position of 1-2 fingers */
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#define FOC_MAX_FINGERS 5
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/*
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* Current state of a single finger on the touchpad.
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*/
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struct focaltech_finger_state {
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/* The touchpad has generated a touch event for the finger */
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bool active;
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/*
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* The touchpad has sent position data for the finger. The
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* flag is 0 when the finger is not active, and there is a
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* time between the first touch event for the finger and the
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* following absolute position packet for the finger where the
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* touchpad has declared the finger to be valid, but we do not
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* have any valid position yet.
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*/
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bool valid;
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/*
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* Absolute position (from the bottom left corner) of the
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* finger.
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*/
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unsigned int x;
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unsigned int y;
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};
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/*
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* Description of the current state of the touchpad hardware.
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*/
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struct focaltech_hw_state {
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/*
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* The touchpad tracks the positions of the fingers for us,
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* the array indices correspond to the finger indices returned
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* in the report packages.
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*/
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struct focaltech_finger_state fingers[FOC_MAX_FINGERS];
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/* True if the clickpad has been pressed. */
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bool pressed;
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};
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struct focaltech_data {
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unsigned int x_max, y_max;
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struct focaltech_hw_state state;
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};
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static void focaltech_report_state(struct psmouse *psmouse)
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{
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struct focaltech_data *priv = psmouse->private;
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struct focaltech_hw_state *state = &priv->state;
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struct input_dev *dev = psmouse->dev;
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int i;
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for (i = 0; i < FOC_MAX_FINGERS; i++) {
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struct focaltech_finger_state *finger = &state->fingers[i];
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bool active = finger->active && finger->valid;
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input_mt_slot(dev, i);
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input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
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if (active) {
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input_report_abs(dev, ABS_MT_POSITION_X, finger->x);
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input_report_abs(dev, ABS_MT_POSITION_Y,
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2015-03-08 05:26:31 +08:00
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priv->y_max - finger->y);
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2014-12-30 01:26:35 +08:00
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}
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}
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input_mt_report_pointer_emulation(dev, true);
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input_report_key(psmouse->dev, BTN_LEFT, state->pressed);
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input_sync(psmouse->dev);
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}
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static void focaltech_process_touch_packet(struct psmouse *psmouse,
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unsigned char *packet)
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{
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struct focaltech_data *priv = psmouse->private;
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struct focaltech_hw_state *state = &priv->state;
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unsigned char fingers = packet[1];
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int i;
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state->pressed = (packet[0] >> 4) & 1;
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/* the second byte contains a bitmap of all fingers touching the pad */
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for (i = 0; i < FOC_MAX_FINGERS; i++) {
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state->fingers[i].active = fingers & 0x1;
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if (!state->fingers[i].active) {
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/*
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* Even when the finger becomes active again, we still
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* will have to wait for the first valid position.
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*/
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state->fingers[i].valid = false;
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}
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fingers >>= 1;
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}
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}
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static void focaltech_process_abs_packet(struct psmouse *psmouse,
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unsigned char *packet)
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{
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struct focaltech_data *priv = psmouse->private;
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struct focaltech_hw_state *state = &priv->state;
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unsigned int finger;
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finger = (packet[1] >> 4) - 1;
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if (finger >= FOC_MAX_FINGERS) {
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psmouse_err(psmouse, "Invalid finger in abs packet: %d\n",
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finger);
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return;
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}
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state->pressed = (packet[0] >> 4) & 1;
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/*
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* packet[5] contains some kind of tool size in the most
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* significant nibble. 0xff is a special value (latching) that
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* signals a large contact area.
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*/
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if (packet[5] == 0xff) {
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state->fingers[finger].valid = false;
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return;
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}
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state->fingers[finger].x = ((packet[1] & 0xf) << 8) | packet[2];
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state->fingers[finger].y = (packet[3] << 8) | packet[4];
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state->fingers[finger].valid = true;
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}
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static void focaltech_process_rel_packet(struct psmouse *psmouse,
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unsigned char *packet)
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{
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struct focaltech_data *priv = psmouse->private;
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struct focaltech_hw_state *state = &priv->state;
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int finger1, finger2;
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state->pressed = packet[0] >> 7;
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finger1 = ((packet[0] >> 4) & 0x7) - 1;
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if (finger1 < FOC_MAX_FINGERS) {
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state->fingers[finger1].x += (char)packet[1];
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state->fingers[finger1].y += (char)packet[2];
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} else {
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psmouse_err(psmouse, "First finger in rel packet invalid: %d\n",
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finger1);
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}
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/*
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* If there is an odd number of fingers, the last relative
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* packet only contains one finger. In this case, the second
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* finger index in the packet is 0 (we subtract 1 in the lines
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* above to create array indices, so the finger will overflow
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* and be above FOC_MAX_FINGERS).
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*/
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finger2 = ((packet[3] >> 4) & 0x7) - 1;
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if (finger2 < FOC_MAX_FINGERS) {
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state->fingers[finger2].x += (char)packet[4];
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state->fingers[finger2].y += (char)packet[5];
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}
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}
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static void focaltech_process_packet(struct psmouse *psmouse)
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{
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unsigned char *packet = psmouse->packet;
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switch (packet[0] & 0xf) {
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case FOC_TOUCH:
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focaltech_process_touch_packet(psmouse, packet);
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break;
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case FOC_ABS:
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focaltech_process_abs_packet(psmouse, packet);
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break;
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case FOC_REL:
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focaltech_process_rel_packet(psmouse, packet);
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break;
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default:
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psmouse_err(psmouse, "Unknown packet type: %02x\n", packet[0]);
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break;
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}
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focaltech_report_state(psmouse);
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}
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static psmouse_ret_t focaltech_process_byte(struct psmouse *psmouse)
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{
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if (psmouse->pktcnt >= 6) { /* Full packet received */
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focaltech_process_packet(psmouse);
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return PSMOUSE_FULL_PACKET;
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}
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/*
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* We might want to do some validation of the data here, but
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* we do not know the protocol well enough
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*/
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return PSMOUSE_GOOD_DATA;
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}
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static int focaltech_switch_protocol(struct psmouse *psmouse)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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unsigned char param[3];
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param[0] = 0;
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if (ps2_command(ps2dev, param, 0x10f8))
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return -EIO;
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if (ps2_command(ps2dev, param, 0x10f8))
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return -EIO;
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if (ps2_command(ps2dev, param, 0x10f8))
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return -EIO;
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param[0] = 1;
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if (ps2_command(ps2dev, param, 0x10f8))
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return -EIO;
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11))
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return -EIO;
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_ENABLE))
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return -EIO;
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return 0;
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}
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static void focaltech_disconnect(struct psmouse *psmouse)
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{
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focaltech_reset(psmouse);
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kfree(psmouse->private);
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psmouse->private = NULL;
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}
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static int focaltech_reconnect(struct psmouse *psmouse)
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{
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int error;
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focaltech_reset(psmouse);
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error = focaltech_switch_protocol(psmouse);
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if (error) {
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psmouse_err(psmouse, "Unable to initialize the device\n");
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return error;
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}
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return 0;
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}
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static void focaltech_set_input_params(struct psmouse *psmouse)
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{
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struct input_dev *dev = psmouse->dev;
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struct focaltech_data *priv = psmouse->private;
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/*
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* Undo part of setup done for us by psmouse core since touchpad
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* is not a relative device.
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*/
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__clear_bit(EV_REL, dev->evbit);
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__clear_bit(REL_X, dev->relbit);
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__clear_bit(REL_Y, dev->relbit);
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__clear_bit(BTN_RIGHT, dev->keybit);
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__clear_bit(BTN_MIDDLE, dev->keybit);
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/*
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* Now set up our capabilities.
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*/
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__set_bit(EV_ABS, dev->evbit);
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input_set_abs_params(dev, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
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input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
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input_mt_init_slots(dev, 5, INPUT_MT_POINTER);
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__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
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}
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static int focaltech_read_register(struct ps2dev *ps2dev, int reg,
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unsigned char *param)
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{
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11))
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return -EIO;
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param[0] = 0;
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
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return -EIO;
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
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return -EIO;
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
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return -EIO;
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param[0] = reg;
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
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return -EIO;
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
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return -EIO;
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return 0;
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}
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static int focaltech_read_size(struct psmouse *psmouse)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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struct focaltech_data *priv = psmouse->private;
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char param[3];
|
|
|
|
|
|
|
|
if (focaltech_read_register(ps2dev, 2, param))
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
/* not sure whether this is 100% correct */
|
|
|
|
priv->x_max = (unsigned char)param[1] * 128;
|
|
|
|
priv->y_max = (unsigned char)param[2] * 128;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
int focaltech_init(struct psmouse *psmouse)
|
|
|
|
{
|
|
|
|
struct focaltech_data *priv;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
psmouse->private = priv = kzalloc(sizeof(struct focaltech_data),
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!priv)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
focaltech_reset(psmouse);
|
|
|
|
|
|
|
|
error = focaltech_read_size(psmouse);
|
|
|
|
if (error) {
|
|
|
|
psmouse_err(psmouse,
|
|
|
|
"Unable to read the size of the touchpad\n");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
error = focaltech_switch_protocol(psmouse);
|
|
|
|
if (error) {
|
|
|
|
psmouse_err(psmouse, "Unable to initialize the device\n");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
focaltech_set_input_params(psmouse);
|
|
|
|
|
|
|
|
psmouse->protocol_handler = focaltech_process_byte;
|
|
|
|
psmouse->pktsize = 6;
|
|
|
|
psmouse->disconnect = focaltech_disconnect;
|
|
|
|
psmouse->reconnect = focaltech_reconnect;
|
|
|
|
psmouse->cleanup = focaltech_reset;
|
|
|
|
/* resync is not supported yet */
|
|
|
|
psmouse->resync_time = 0;
|
2014-09-13 08:24:47 +08:00
|
|
|
|
|
|
|
return 0;
|
2014-12-30 01:26:35 +08:00
|
|
|
|
|
|
|
fail:
|
|
|
|
focaltech_reset(psmouse);
|
|
|
|
kfree(priv);
|
|
|
|
return error;
|
2014-09-13 08:24:47 +08:00
|
|
|
}
|
2014-12-30 01:26:35 +08:00
|
|
|
|
|
|
|
#else /* CONFIG_MOUSE_PS2_FOCALTECH */
|
|
|
|
|
|
|
|
int focaltech_init(struct psmouse *psmouse)
|
|
|
|
{
|
|
|
|
focaltech_reset(psmouse);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* CONFIG_MOUSE_PS2_FOCALTECH */
|