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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788// SPDX-License-Identifier: GPL-2.0-or-later/* ---------------------------------------------------------------------------- * touchkit_ps2.c -- Driver for eGalax TouchKit PS/2 Touchscreens * * Copyright (C) 2005 by Stefan Lucke * Copyright (C) 2004 by Daniel Ritz * Copyright (C) by Todd E. Johnson (mtouchusb.c) * * Based upon touchkitusb.c * * Vendor documentation is available at: * http://home.eeti.com.tw/web20/drivers/Software%20Programming%20Guide_v2.0.pdf */
#include <linux/kernel.h>
#include <linux/input.h>#include <linux/serio.h>#include <linux/libps2.h>
#include "psmouse.h"#include "touchkit_ps2.h"
#define TOUCHKIT_MAX_XC 0x07ff#define TOUCHKIT_MAX_YC 0x07ff
#define TOUCHKIT_CMD 0x0a#define TOUCHKIT_CMD_LENGTH 1
#define TOUCHKIT_CMD_ACTIVE 'A'#define TOUCHKIT_CMD_FIRMWARE_VERSION 'D'#define TOUCHKIT_CMD_CONTROLLER_TYPE 'E'
#define TOUCHKIT_SEND_PARMS(s, r, c) ((s) << 12 | (r) << 8 | (c))
#define TOUCHKIT_GET_TOUCHED(packet) (((packet)[0]) & 0x01)#define TOUCHKIT_GET_X(packet) (((packet)[1] << 7) | (packet)[2])#define TOUCHKIT_GET_Y(packet) (((packet)[3] << 7) | (packet)[4])
static psmouse_ret_t touchkit_ps2_process_byte(struct psmouse *psmouse){ unsigned char *packet = psmouse->packet; struct input_dev *dev = psmouse->dev;
if (psmouse->pktcnt != 5) return PSMOUSE_GOOD_DATA;
input_report_abs(dev, ABS_X, TOUCHKIT_GET_X(packet)); input_report_abs(dev, ABS_Y, TOUCHKIT_GET_Y(packet)); input_report_key(dev, BTN_TOUCH, TOUCHKIT_GET_TOUCHED(packet)); input_sync(dev);
return PSMOUSE_FULL_PACKET;}
int touchkit_ps2_detect(struct psmouse *psmouse, bool set_properties){ struct input_dev *dev = psmouse->dev; unsigned char param[3]; int command;
param[0] = TOUCHKIT_CMD_LENGTH; param[1] = TOUCHKIT_CMD_ACTIVE; command = TOUCHKIT_SEND_PARMS(2, 3, TOUCHKIT_CMD);
if (ps2_command(&psmouse->ps2dev, param, command)) return -ENODEV;
if (param[0] != TOUCHKIT_CMD || param[1] != 0x01 || param[2] != TOUCHKIT_CMD_ACTIVE) return -ENODEV;
if (set_properties) { dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); dev->keybit[BIT_WORD(BTN_MOUSE)] = 0; dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); input_set_abs_params(dev, ABS_X, 0, TOUCHKIT_MAX_XC, 0, 0); input_set_abs_params(dev, ABS_Y, 0, TOUCHKIT_MAX_YC, 0, 0);
psmouse->vendor = "eGalax"; psmouse->name = "Touchscreen"; psmouse->protocol_handler = touchkit_ps2_process_byte; psmouse->pktsize = 5; }
return 0;}