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87 lines
2.4 KiB
87 lines
2.4 KiB
// 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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