725 lines
19 KiB
C
725 lines
19 KiB
C
/*
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* Elantech Touchpad driver (v6)
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*
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* Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Trademarks are the property of their respective owners.
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*/
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/serio.h>
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#include <linux/libps2.h>
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#include "psmouse.h"
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#include "elantech.h"
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#define elantech_debug(format, arg...) \
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do { \
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if (etd->debug) \
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printk(KERN_DEBUG format, ##arg); \
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} while (0)
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/*
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* Send a Synaptics style sliced query command
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*/
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static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
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unsigned char *param)
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{
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if (psmouse_sliced_command(psmouse, c) ||
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ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
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pr_err("elantech.c: synaptics_send_cmd query 0x%02x failed.\n", c);
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return -1;
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}
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return 0;
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}
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/*
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* A retrying version of ps2_command
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*/
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static int elantech_ps2_command(struct psmouse *psmouse,
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unsigned char *param, int command)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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struct elantech_data *etd = psmouse->private;
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int rc;
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int tries = ETP_PS2_COMMAND_TRIES;
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do {
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rc = ps2_command(ps2dev, param, command);
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if (rc == 0)
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break;
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tries--;
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elantech_debug("elantech.c: retrying ps2 command 0x%02x (%d).\n",
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command, tries);
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msleep(ETP_PS2_COMMAND_DELAY);
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} while (tries > 0);
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if (rc)
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pr_err("elantech.c: ps2 command 0x%02x failed.\n", command);
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return rc;
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}
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/*
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* Send an Elantech style special command to read a value from a register
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*/
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static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
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unsigned char *val)
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{
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struct elantech_data *etd = psmouse->private;
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unsigned char param[3];
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int rc = 0;
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if (reg < 0x10 || reg > 0x26)
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return -1;
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if (reg > 0x11 && reg < 0x20)
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return -1;
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switch (etd->hw_version) {
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case 1:
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if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) ||
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psmouse_sliced_command(psmouse, reg) ||
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ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
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rc = -1;
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}
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break;
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case 2:
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if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
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elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) ||
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elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
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elantech_ps2_command(psmouse, NULL, reg) ||
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elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) {
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rc = -1;
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}
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break;
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}
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if (rc)
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pr_err("elantech.c: failed to read register 0x%02x.\n", reg);
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else
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*val = param[0];
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return rc;
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}
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/*
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* Send an Elantech style special command to write a register with a value
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*/
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static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
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unsigned char val)
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{
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struct elantech_data *etd = psmouse->private;
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int rc = 0;
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if (reg < 0x10 || reg > 0x26)
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return -1;
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if (reg > 0x11 && reg < 0x20)
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return -1;
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switch (etd->hw_version) {
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case 1:
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if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) ||
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psmouse_sliced_command(psmouse, reg) ||
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psmouse_sliced_command(psmouse, val) ||
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ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
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rc = -1;
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}
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break;
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case 2:
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if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
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elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) ||
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elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
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elantech_ps2_command(psmouse, NULL, reg) ||
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elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
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elantech_ps2_command(psmouse, NULL, val) ||
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elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
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rc = -1;
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}
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break;
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}
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if (rc)
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pr_err("elantech.c: failed to write register 0x%02x with value 0x%02x.\n",
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reg, val);
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return rc;
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}
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/*
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* Dump a complete mouse movement packet to the syslog
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*/
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static void elantech_packet_dump(unsigned char *packet, int size)
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{
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int i;
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printk(KERN_DEBUG "elantech.c: PS/2 packet [");
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for (i = 0; i < size; i++)
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printk("%s0x%02x ", (i) ? ", " : " ", packet[i]);
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printk("]\n");
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}
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/*
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* Interpret complete data packets and report absolute mode input events for
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* hardware version 1. (4 byte packets)
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*/
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static void elantech_report_absolute_v1(struct psmouse *psmouse)
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{
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struct input_dev *dev = psmouse->dev;
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struct elantech_data *etd = psmouse->private;
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unsigned char *packet = psmouse->packet;
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int fingers;
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static int old_fingers;
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if (etd->fw_version_maj == 0x01) {
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/* byte 0: D U p1 p2 1 p3 R L
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byte 1: f 0 th tw x9 x8 y9 y8 */
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fingers = ((packet[1] & 0x80) >> 7) +
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((packet[1] & 0x30) >> 4);
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} else {
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/* byte 0: n1 n0 p2 p1 1 p3 R L
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byte 1: 0 0 0 0 x9 x8 y9 y8 */
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fingers = (packet[0] & 0xc0) >> 6;
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}
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if (etd->jumpy_cursor) {
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/* Discard packets that are likely to have bogus coordinates */
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if (fingers > old_fingers) {
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elantech_debug("elantech.c: discarding packet\n");
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goto discard_packet_v1;
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}
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}
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input_report_key(dev, BTN_TOUCH, fingers != 0);
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/* byte 2: x7 x6 x5 x4 x3 x2 x1 x0
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byte 3: y7 y6 y5 y4 y3 y2 y1 y0 */
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if (fingers) {
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input_report_abs(dev, ABS_X,
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((packet[1] & 0x0c) << 6) | packet[2]);
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input_report_abs(dev, ABS_Y, ETP_YMAX_V1 -
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(((packet[1] & 0x03) << 8) | packet[3]));
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}
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input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
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input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
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input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
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input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
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input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
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if ((etd->fw_version_maj == 0x01) &&
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(etd->capabilities & ETP_CAP_HAS_ROCKER)) {
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/* rocker up */
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input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
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/* rocker down */
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input_report_key(dev, BTN_BACK, packet[0] & 0x80);
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}
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input_sync(dev);
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discard_packet_v1:
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old_fingers = fingers;
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}
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/*
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* Interpret complete data packets and report absolute mode input events for
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* hardware version 2. (6 byte packets)
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*/
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static void elantech_report_absolute_v2(struct psmouse *psmouse)
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{
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struct input_dev *dev = psmouse->dev;
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unsigned char *packet = psmouse->packet;
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int fingers, x1, y1, x2, y2;
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/* byte 0: n1 n0 . . . . R L */
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fingers = (packet[0] & 0xc0) >> 6;
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input_report_key(dev, BTN_TOUCH, fingers != 0);
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switch (fingers) {
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case 1:
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/* byte 1: x15 x14 x13 x12 x11 x10 x9 x8
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byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */
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input_report_abs(dev, ABS_X, (packet[1] << 8) | packet[2]);
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/* byte 4: y15 y14 y13 y12 y11 y10 y8 y8
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byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */
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input_report_abs(dev, ABS_Y, ETP_YMAX_V2 -
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((packet[4] << 8) | packet[5]));
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break;
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case 2:
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/* The coordinate of each finger is reported separately with
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a lower resolution for two finger touches */
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/* byte 0: . . ay8 ax8 . . . .
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byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 */
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x1 = ((packet[0] & 0x10) << 4) | packet[1];
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/* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
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y1 = ETP_2FT_YMAX - (((packet[0] & 0x20) << 3) | packet[2]);
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/* byte 3: . . by8 bx8 . . . .
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byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 */
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x2 = ((packet[3] & 0x10) << 4) | packet[4];
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/* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
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y2 = ETP_2FT_YMAX - (((packet[3] & 0x20) << 3) | packet[5]);
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/* For compatibility with the X Synaptics driver scale up one
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coordinate and report as ordinary mouse movent */
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input_report_abs(dev, ABS_X, x1 << 2);
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input_report_abs(dev, ABS_Y, y1 << 2);
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/* For compatibility with the proprietary X Elantech driver
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report both coordinates as hat coordinates */
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input_report_abs(dev, ABS_HAT0X, x1);
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input_report_abs(dev, ABS_HAT0Y, y1);
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input_report_abs(dev, ABS_HAT1X, x2);
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input_report_abs(dev, ABS_HAT1Y, y2);
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break;
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}
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input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
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input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
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input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
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input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
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input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
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input_sync(dev);
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}
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static int elantech_check_parity_v1(struct psmouse *psmouse)
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{
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struct elantech_data *etd = psmouse->private;
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unsigned char *packet = psmouse->packet;
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unsigned char p1, p2, p3;
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/* Parity bits are placed differently */
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if (etd->fw_version_maj == 0x01) {
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/* byte 0: D U p1 p2 1 p3 R L */
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p1 = (packet[0] & 0x20) >> 5;
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p2 = (packet[0] & 0x10) >> 4;
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} else {
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/* byte 0: n1 n0 p2 p1 1 p3 R L */
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p1 = (packet[0] & 0x10) >> 4;
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p2 = (packet[0] & 0x20) >> 5;
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}
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p3 = (packet[0] & 0x04) >> 2;
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return etd->parity[packet[1]] == p1 &&
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etd->parity[packet[2]] == p2 &&
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etd->parity[packet[3]] == p3;
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}
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/*
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* Process byte stream from mouse and handle complete packets
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*/
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static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
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{
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struct elantech_data *etd = psmouse->private;
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if (psmouse->pktcnt < psmouse->pktsize)
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return PSMOUSE_GOOD_DATA;
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if (etd->debug > 1)
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elantech_packet_dump(psmouse->packet, psmouse->pktsize);
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switch (etd->hw_version) {
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case 1:
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if (etd->paritycheck && !elantech_check_parity_v1(psmouse))
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return PSMOUSE_BAD_DATA;
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elantech_report_absolute_v1(psmouse);
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break;
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case 2:
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/* We don't know how to check parity in protocol v2 */
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elantech_report_absolute_v2(psmouse);
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break;
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}
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return PSMOUSE_FULL_PACKET;
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}
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/*
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* Put the touchpad into absolute mode
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*/
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static int elantech_set_absolute_mode(struct psmouse *psmouse)
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{
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struct elantech_data *etd = psmouse->private;
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unsigned char val;
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int tries = ETP_READ_BACK_TRIES;
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int rc = 0;
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switch (etd->hw_version) {
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case 1:
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etd->reg_10 = 0x16;
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etd->reg_11 = 0x8f;
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if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
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elantech_write_reg(psmouse, 0x11, etd->reg_11)) {
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rc = -1;
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}
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break;
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case 2:
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/* Windows driver values */
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etd->reg_10 = 0x54;
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etd->reg_11 = 0x88; /* 0x8a */
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etd->reg_21 = 0x60; /* 0x00 */
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if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
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elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
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elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
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rc = -1;
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break;
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}
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}
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if (rc == 0) {
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/*
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* Read back reg 0x10. For hardware version 1 we must make
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* sure the absolute mode bit is set. For hardware version 2
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* the touchpad is probably initalising and not ready until
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* we read back the value we just wrote.
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*/
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do {
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rc = elantech_read_reg(psmouse, 0x10, &val);
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if (rc == 0)
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break;
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tries--;
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elantech_debug("elantech.c: retrying read (%d).\n",
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tries);
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msleep(ETP_READ_BACK_DELAY);
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} while (tries > 0);
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if (rc) {
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pr_err("elantech.c: failed to read back register 0x10.\n");
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} else if (etd->hw_version == 1 &&
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!(val & ETP_R10_ABSOLUTE_MODE)) {
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pr_err("elantech.c: touchpad refuses "
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"to switch to absolute mode.\n");
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rc = -1;
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}
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}
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if (rc)
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pr_err("elantech.c: failed to initialise registers.\n");
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return rc;
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}
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/*
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* Set the appropriate event bits for the input subsystem
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*/
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static void elantech_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 elantech_data *etd = psmouse->private;
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__set_bit(EV_KEY, dev->evbit);
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__set_bit(EV_ABS, dev->evbit);
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__set_bit(BTN_LEFT, dev->keybit);
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__set_bit(BTN_RIGHT, dev->keybit);
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__set_bit(BTN_TOUCH, dev->keybit);
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__set_bit(BTN_TOOL_FINGER, dev->keybit);
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__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
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__set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
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switch (etd->hw_version) {
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case 1:
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/* Rocker button */
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if ((etd->fw_version_maj == 0x01) &&
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(etd->capabilities & ETP_CAP_HAS_ROCKER)) {
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__set_bit(BTN_FORWARD, dev->keybit);
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__set_bit(BTN_BACK, dev->keybit);
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}
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input_set_abs_params(dev, ABS_X, ETP_XMIN_V1, ETP_XMAX_V1, 0, 0);
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input_set_abs_params(dev, ABS_Y, ETP_YMIN_V1, ETP_YMAX_V1, 0, 0);
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break;
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case 2:
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input_set_abs_params(dev, ABS_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
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input_set_abs_params(dev, ABS_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
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input_set_abs_params(dev, ABS_HAT0X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0);
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input_set_abs_params(dev, ABS_HAT0Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0);
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input_set_abs_params(dev, ABS_HAT1X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0);
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input_set_abs_params(dev, ABS_HAT1Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0);
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break;
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}
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}
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struct elantech_attr_data {
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size_t field_offset;
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unsigned char reg;
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};
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/*
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* Display a register value by reading a sysfs entry
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*/
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static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data,
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char *buf)
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{
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struct elantech_data *etd = psmouse->private;
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struct elantech_attr_data *attr = data;
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unsigned char *reg = (unsigned char *) etd + attr->field_offset;
|
|
int rc = 0;
|
|
|
|
if (attr->reg)
|
|
rc = elantech_read_reg(psmouse, attr->reg, reg);
|
|
|
|
return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg);
|
|
}
|
|
|
|
/*
|
|
* Write a register value by writing a sysfs entry
|
|
*/
|
|
static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
|
|
void *data, const char *buf, size_t count)
|
|
{
|
|
struct elantech_data *etd = psmouse->private;
|
|
struct elantech_attr_data *attr = data;
|
|
unsigned char *reg = (unsigned char *) etd + attr->field_offset;
|
|
unsigned long value;
|
|
int err;
|
|
|
|
err = strict_strtoul(buf, 16, &value);
|
|
if (err)
|
|
return err;
|
|
|
|
if (value > 0xff)
|
|
return -EINVAL;
|
|
|
|
/* Do we need to preserve some bits for version 2 hardware too? */
|
|
if (etd->hw_version == 1) {
|
|
if (attr->reg == 0x10)
|
|
/* Force absolute mode always on */
|
|
value |= ETP_R10_ABSOLUTE_MODE;
|
|
else if (attr->reg == 0x11)
|
|
/* Force 4 byte mode always on */
|
|
value |= ETP_R11_4_BYTE_MODE;
|
|
}
|
|
|
|
if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0)
|
|
*reg = value;
|
|
|
|
return count;
|
|
}
|
|
|
|
#define ELANTECH_INT_ATTR(_name, _register) \
|
|
static struct elantech_attr_data elantech_attr_##_name = { \
|
|
.field_offset = offsetof(struct elantech_data, _name), \
|
|
.reg = _register, \
|
|
}; \
|
|
PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
|
|
&elantech_attr_##_name, \
|
|
elantech_show_int_attr, \
|
|
elantech_set_int_attr)
|
|
|
|
ELANTECH_INT_ATTR(reg_10, 0x10);
|
|
ELANTECH_INT_ATTR(reg_11, 0x11);
|
|
ELANTECH_INT_ATTR(reg_20, 0x20);
|
|
ELANTECH_INT_ATTR(reg_21, 0x21);
|
|
ELANTECH_INT_ATTR(reg_22, 0x22);
|
|
ELANTECH_INT_ATTR(reg_23, 0x23);
|
|
ELANTECH_INT_ATTR(reg_24, 0x24);
|
|
ELANTECH_INT_ATTR(reg_25, 0x25);
|
|
ELANTECH_INT_ATTR(reg_26, 0x26);
|
|
ELANTECH_INT_ATTR(debug, 0);
|
|
ELANTECH_INT_ATTR(paritycheck, 0);
|
|
|
|
static struct attribute *elantech_attrs[] = {
|
|
&psmouse_attr_reg_10.dattr.attr,
|
|
&psmouse_attr_reg_11.dattr.attr,
|
|
&psmouse_attr_reg_20.dattr.attr,
|
|
&psmouse_attr_reg_21.dattr.attr,
|
|
&psmouse_attr_reg_22.dattr.attr,
|
|
&psmouse_attr_reg_23.dattr.attr,
|
|
&psmouse_attr_reg_24.dattr.attr,
|
|
&psmouse_attr_reg_25.dattr.attr,
|
|
&psmouse_attr_reg_26.dattr.attr,
|
|
&psmouse_attr_debug.dattr.attr,
|
|
&psmouse_attr_paritycheck.dattr.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group elantech_attr_group = {
|
|
.attrs = elantech_attrs,
|
|
};
|
|
|
|
/*
|
|
* Use magic knock to detect Elantech touchpad
|
|
*/
|
|
int elantech_detect(struct psmouse *psmouse, int set_properties)
|
|
{
|
|
struct ps2dev *ps2dev = &psmouse->ps2dev;
|
|
unsigned char param[3];
|
|
|
|
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
|
|
|
|
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
|
|
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
|
|
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
|
|
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
|
|
ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
|
|
pr_debug("elantech.c: sending Elantech magic knock failed.\n");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Report this in case there are Elantech models that use a different
|
|
* set of magic numbers
|
|
*/
|
|
if (param[0] != 0x3c || param[1] != 0x03 || param[2] != 0xc8) {
|
|
pr_debug("elantech.c: "
|
|
"unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
|
|
param[0], param[1], param[2]);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Query touchpad's firmware version and see if it reports known
|
|
* value to avoid mis-detection. Logitech mice are known to respond
|
|
* to Elantech magic knock and there might be more.
|
|
*/
|
|
if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
|
|
pr_debug("elantech.c: failed to query firmware version.\n");
|
|
return -1;
|
|
}
|
|
|
|
pr_debug("elantech.c: Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
|
|
param[0], param[1], param[2]);
|
|
|
|
if (param[0] == 0 || param[1] != 0) {
|
|
pr_debug("elantech.c: Probably not a real Elantech touchpad. Aborting.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (set_properties) {
|
|
psmouse->vendor = "Elantech";
|
|
psmouse->name = "Touchpad";
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Clean up sysfs entries when disconnecting
|
|
*/
|
|
static void elantech_disconnect(struct psmouse *psmouse)
|
|
{
|
|
sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
|
|
&elantech_attr_group);
|
|
kfree(psmouse->private);
|
|
psmouse->private = NULL;
|
|
}
|
|
|
|
/*
|
|
* Put the touchpad back into absolute mode when reconnecting
|
|
*/
|
|
static int elantech_reconnect(struct psmouse *psmouse)
|
|
{
|
|
if (elantech_detect(psmouse, 0))
|
|
return -1;
|
|
|
|
if (elantech_set_absolute_mode(psmouse)) {
|
|
pr_err("elantech.c: failed to put touchpad back into absolute mode.\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialize the touchpad and create sysfs entries
|
|
*/
|
|
int elantech_init(struct psmouse *psmouse)
|
|
{
|
|
struct elantech_data *etd;
|
|
int i, error;
|
|
unsigned char param[3];
|
|
|
|
psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
|
|
if (!etd)
|
|
return -1;
|
|
|
|
etd->parity[0] = 1;
|
|
for (i = 1; i < 256; i++)
|
|
etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
|
|
|
|
/*
|
|
* Do the version query again so we can store the result
|
|
*/
|
|
if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
|
|
pr_err("elantech.c: failed to query firmware version.\n");
|
|
goto init_fail;
|
|
}
|
|
etd->fw_version_maj = param[0];
|
|
etd->fw_version_min = param[2];
|
|
|
|
/*
|
|
* Assume every version greater than this is new EeePC style
|
|
* hardware with 6 byte packets
|
|
*/
|
|
if (etd->fw_version_maj >= 0x02 && etd->fw_version_min >= 0x30) {
|
|
etd->hw_version = 2;
|
|
/* For now show extra debug information */
|
|
etd->debug = 1;
|
|
/* Don't know how to do parity checking for version 2 */
|
|
etd->paritycheck = 0;
|
|
} else {
|
|
etd->hw_version = 1;
|
|
etd->paritycheck = 1;
|
|
}
|
|
pr_info("elantech.c: assuming hardware version %d, firmware version %d.%d\n",
|
|
etd->hw_version, etd->fw_version_maj, etd->fw_version_min);
|
|
|
|
if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY, param)) {
|
|
pr_err("elantech.c: failed to query capabilities.\n");
|
|
goto init_fail;
|
|
}
|
|
pr_info("elantech.c: Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
|
|
param[0], param[1], param[2]);
|
|
etd->capabilities = param[0];
|
|
|
|
/*
|
|
* This firmware seems to suffer from misreporting coordinates when
|
|
* a touch action starts causing the mouse cursor or scrolled page
|
|
* to jump. Enable a workaround.
|
|
*/
|
|
if (etd->fw_version_maj == 0x02 && etd->fw_version_min == 0x22) {
|
|
pr_info("elantech.c: firmware version 2.34 detected, "
|
|
"enabling jumpy cursor workaround\n");
|
|
etd->jumpy_cursor = 1;
|
|
}
|
|
|
|
if (elantech_set_absolute_mode(psmouse)) {
|
|
pr_err("elantech.c: failed to put touchpad into absolute mode.\n");
|
|
goto init_fail;
|
|
}
|
|
|
|
elantech_set_input_params(psmouse);
|
|
|
|
error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
|
|
&elantech_attr_group);
|
|
if (error) {
|
|
pr_err("elantech.c: failed to create sysfs attributes, error: %d.\n",
|
|
error);
|
|
goto init_fail;
|
|
}
|
|
|
|
psmouse->protocol_handler = elantech_process_byte;
|
|
psmouse->disconnect = elantech_disconnect;
|
|
psmouse->reconnect = elantech_reconnect;
|
|
psmouse->pktsize = etd->hw_version == 2 ? 6 : 4;
|
|
|
|
return 0;
|
|
|
|
init_fail:
|
|
kfree(etd);
|
|
return -1;
|
|
}
|