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74ba9207e1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* ----------------------------------------------------------------------------
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* touchkit_ps2.c -- Driver for eGalax TouchKit PS/2 Touchscreens
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*
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* Copyright (C) 2005 by Stefan Lucke
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* Copyright (C) 2004 by Daniel Ritz
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* Copyright (C) by Todd E. Johnson (mtouchusb.c)
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*
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* Based upon touchkitusb.c
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*
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* Vendor documentation is available at:
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* http://home.eeti.com.tw/web20/drivers/Software%20Programming%20Guide_v2.0.pdf
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*/
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#include <linux/kernel.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 "touchkit_ps2.h"
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#define TOUCHKIT_MAX_XC 0x07ff
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#define TOUCHKIT_MAX_YC 0x07ff
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#define TOUCHKIT_CMD 0x0a
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#define TOUCHKIT_CMD_LENGTH 1
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#define TOUCHKIT_CMD_ACTIVE 'A'
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#define TOUCHKIT_CMD_FIRMWARE_VERSION 'D'
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#define TOUCHKIT_CMD_CONTROLLER_TYPE 'E'
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#define TOUCHKIT_SEND_PARMS(s, r, c) ((s) << 12 | (r) << 8 | (c))
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#define TOUCHKIT_GET_TOUCHED(packet) (((packet)[0]) & 0x01)
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#define TOUCHKIT_GET_X(packet) (((packet)[1] << 7) | (packet)[2])
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#define TOUCHKIT_GET_Y(packet) (((packet)[3] << 7) | (packet)[4])
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static psmouse_ret_t touchkit_ps2_process_byte(struct psmouse *psmouse)
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{
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unsigned char *packet = psmouse->packet;
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struct input_dev *dev = psmouse->dev;
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if (psmouse->pktcnt != 5)
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return PSMOUSE_GOOD_DATA;
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input_report_abs(dev, ABS_X, TOUCHKIT_GET_X(packet));
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input_report_abs(dev, ABS_Y, TOUCHKIT_GET_Y(packet));
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input_report_key(dev, BTN_TOUCH, TOUCHKIT_GET_TOUCHED(packet));
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input_sync(dev);
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return PSMOUSE_FULL_PACKET;
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}
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int touchkit_ps2_detect(struct psmouse *psmouse, bool set_properties)
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{
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struct input_dev *dev = psmouse->dev;
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unsigned char param[3];
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int command;
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param[0] = TOUCHKIT_CMD_LENGTH;
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param[1] = TOUCHKIT_CMD_ACTIVE;
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command = TOUCHKIT_SEND_PARMS(2, 3, TOUCHKIT_CMD);
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if (ps2_command(&psmouse->ps2dev, param, command))
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return -ENODEV;
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if (param[0] != TOUCHKIT_CMD || param[1] != 0x01 ||
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param[2] != TOUCHKIT_CMD_ACTIVE)
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return -ENODEV;
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if (set_properties) {
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dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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dev->keybit[BIT_WORD(BTN_MOUSE)] = 0;
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dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
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input_set_abs_params(dev, ABS_X, 0, TOUCHKIT_MAX_XC, 0, 0);
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input_set_abs_params(dev, ABS_Y, 0, TOUCHKIT_MAX_YC, 0, 0);
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psmouse->vendor = "eGalax";
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psmouse->name = "Touchscreen";
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psmouse->protocol_handler = touchkit_ps2_process_byte;
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psmouse->pktsize = 5;
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}
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return 0;
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}
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