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![Thomas Gleixner](/assets/img/avatar_default.png)
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 59 temple place suite 330 boston ma 02111 1307 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 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
208 lines
4.7 KiB
C
208 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 1999-2001 Vojtech Pavlik
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*/
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/*
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* Magellan and Space Mouse 6dof controller driver for Linux
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*/
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/*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/serio.h>
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#define DRIVER_DESC "Magellan and SpaceMouse 6dof controller driver"
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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/*
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* Definitions & global arrays.
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*/
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#define MAGELLAN_MAX_LENGTH 32
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static int magellan_buttons[] = { BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
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static int magellan_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
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/*
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* Per-Magellan data.
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*/
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struct magellan {
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struct input_dev *dev;
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int idx;
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unsigned char data[MAGELLAN_MAX_LENGTH];
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char phys[32];
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};
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/*
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* magellan_crunch_nibbles() verifies that the bytes sent from the Magellan
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* have correct upper nibbles for the lower ones, if not, the packet will
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* be thrown away. It also strips these upper halves to simplify further
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* processing.
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*/
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static int magellan_crunch_nibbles(unsigned char *data, int count)
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{
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static unsigned char nibbles[16] = "0AB3D56GH9:K<MN?";
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do {
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if (data[count] == nibbles[data[count] & 0xf])
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data[count] = data[count] & 0xf;
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else
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return -1;
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} while (--count);
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return 0;
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}
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static void magellan_process_packet(struct magellan* magellan)
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{
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struct input_dev *dev = magellan->dev;
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unsigned char *data = magellan->data;
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int i, t;
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if (!magellan->idx) return;
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switch (magellan->data[0]) {
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case 'd': /* Axis data */
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if (magellan->idx != 25) return;
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if (magellan_crunch_nibbles(data, 24)) return;
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for (i = 0; i < 6; i++)
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input_report_abs(dev, magellan_axes[i],
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(data[(i << 2) + 1] << 12 | data[(i << 2) + 2] << 8 |
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data[(i << 2) + 3] << 4 | data[(i << 2) + 4]) - 32768);
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break;
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case 'k': /* Button data */
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if (magellan->idx != 4) return;
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if (magellan_crunch_nibbles(data, 3)) return;
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t = (data[1] << 1) | (data[2] << 5) | data[3];
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for (i = 0; i < 9; i++) input_report_key(dev, magellan_buttons[i], (t >> i) & 1);
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break;
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}
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input_sync(dev);
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}
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static irqreturn_t magellan_interrupt(struct serio *serio,
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unsigned char data, unsigned int flags)
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{
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struct magellan* magellan = serio_get_drvdata(serio);
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if (data == '\r') {
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magellan_process_packet(magellan);
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magellan->idx = 0;
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} else {
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if (magellan->idx < MAGELLAN_MAX_LENGTH)
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magellan->data[magellan->idx++] = data;
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}
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return IRQ_HANDLED;
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}
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/*
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* magellan_disconnect() is the opposite of magellan_connect()
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*/
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static void magellan_disconnect(struct serio *serio)
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{
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struct magellan* magellan = serio_get_drvdata(serio);
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serio_close(serio);
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serio_set_drvdata(serio, NULL);
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input_unregister_device(magellan->dev);
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kfree(magellan);
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}
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/*
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* magellan_connect() is the routine that is called when someone adds a
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* new serio device that supports Magellan protocol and registers it as
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* an input device.
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*/
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static int magellan_connect(struct serio *serio, struct serio_driver *drv)
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{
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struct magellan *magellan;
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struct input_dev *input_dev;
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int err = -ENOMEM;
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int i;
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magellan = kzalloc(sizeof(struct magellan), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!magellan || !input_dev)
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goto fail1;
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magellan->dev = input_dev;
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snprintf(magellan->phys, sizeof(magellan->phys), "%s/input0", serio->phys);
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input_dev->name = "LogiCad3D Magellan / SpaceMouse";
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input_dev->phys = magellan->phys;
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input_dev->id.bustype = BUS_RS232;
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input_dev->id.vendor = SERIO_MAGELLAN;
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input_dev->id.product = 0x0001;
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input_dev->id.version = 0x0100;
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input_dev->dev.parent = &serio->dev;
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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for (i = 0; i < 9; i++)
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set_bit(magellan_buttons[i], input_dev->keybit);
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for (i = 0; i < 6; i++)
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input_set_abs_params(input_dev, magellan_axes[i], -360, 360, 0, 0);
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serio_set_drvdata(serio, magellan);
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err = serio_open(serio, drv);
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if (err)
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goto fail2;
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err = input_register_device(magellan->dev);
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if (err)
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goto fail3;
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return 0;
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fail3: serio_close(serio);
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fail2: serio_set_drvdata(serio, NULL);
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fail1: input_free_device(input_dev);
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kfree(magellan);
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return err;
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}
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/*
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* The serio driver structure.
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*/
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static const struct serio_device_id magellan_serio_ids[] = {
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{
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.type = SERIO_RS232,
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.proto = SERIO_MAGELLAN,
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.id = SERIO_ANY,
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.extra = SERIO_ANY,
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},
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{ 0 }
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};
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MODULE_DEVICE_TABLE(serio, magellan_serio_ids);
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static struct serio_driver magellan_drv = {
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.driver = {
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.name = "magellan",
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},
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.description = DRIVER_DESC,
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.id_table = magellan_serio_ids,
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.interrupt = magellan_interrupt,
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.connect = magellan_connect,
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.disconnect = magellan_disconnect,
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};
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module_serio_driver(magellan_drv);
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