linux/drivers/input/joystick/warrior.c
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   1/*
   2 *  Copyright (c) 1999-2001 Vojtech Pavlik
   3 */
   4
   5/*
   6 * Logitech WingMan Warrior joystick driver for Linux
   7 */
   8
   9/*
  10 * This program is free warftware; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation; either version 2 of the License, or
  13 * (at your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 * GNU General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License
  21 * along with this program; if not, write to the Free Software
  22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23 *
  24 *  Should you need to contact me, the author, you can do so either by
  25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27 */
  28
  29#include <linux/kernel.h>
  30#include <linux/module.h>
  31#include <linux/slab.h>
  32#include <linux/input.h>
  33#include <linux/serio.h>
  34#include <linux/init.h>
  35
  36#define DRIVER_DESC     "Logitech WingMan Warrior joystick driver"
  37
  38MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  39MODULE_DESCRIPTION(DRIVER_DESC);
  40MODULE_LICENSE("GPL");
  41
  42/*
  43 * Constants.
  44 */
  45
  46#define WARRIOR_MAX_LENGTH      16
  47static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 };
  48
  49/*
  50 * Per-Warrior data.
  51 */
  52
  53struct warrior {
  54        struct input_dev *dev;
  55        int idx, len;
  56        unsigned char data[WARRIOR_MAX_LENGTH];
  57        char phys[32];
  58};
  59
  60/*
  61 * warrior_process_packet() decodes packets the driver receives from the
  62 * Warrior. It updates the data accordingly.
  63 */
  64
  65static void warrior_process_packet(struct warrior *warrior)
  66{
  67        struct input_dev *dev = warrior->dev;
  68        unsigned char *data = warrior->data;
  69
  70        if (!warrior->idx) return;
  71
  72        switch ((data[0] >> 4) & 7) {
  73                case 1:                                 /* Button data */
  74                        input_report_key(dev, BTN_TRIGGER,  data[3]       & 1);
  75                        input_report_key(dev, BTN_THUMB,   (data[3] >> 1) & 1);
  76                        input_report_key(dev, BTN_TOP,     (data[3] >> 2) & 1);
  77                        input_report_key(dev, BTN_TOP2,    (data[3] >> 3) & 1);
  78                        break;
  79                case 3:                                 /* XY-axis info->data */
  80                        input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
  81                        input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  82                        break;
  83                case 5:                                 /* Throttle, spinner, hat info->data */
  84                        input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  85                        input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
  86                        input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
  87                        input_report_rel(dev, REL_DIAL,  (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
  88                        break;
  89        }
  90        input_sync(dev);
  91}
  92
  93/*
  94 * warrior_interrupt() is called by the low level driver when characters
  95 * are ready for us. We then buffer them for further processing, or call the
  96 * packet processing routine.
  97 */
  98
  99static irqreturn_t warrior_interrupt(struct serio *serio,
 100                unsigned char data, unsigned int flags)
 101{
 102        struct warrior *warrior = serio_get_drvdata(serio);
 103
 104        if (data & 0x80) {
 105                if (warrior->idx) warrior_process_packet(warrior);
 106                warrior->idx = 0;
 107                warrior->len = warrior_lengths[(data >> 4) & 7];
 108        }
 109
 110        if (warrior->idx < warrior->len)
 111                warrior->data[warrior->idx++] = data;
 112
 113        if (warrior->idx == warrior->len) {
 114                if (warrior->idx) warrior_process_packet(warrior);
 115                warrior->idx = 0;
 116                warrior->len = 0;
 117        }
 118        return IRQ_HANDLED;
 119}
 120
 121/*
 122 * warrior_disconnect() is the opposite of warrior_connect()
 123 */
 124
 125static void warrior_disconnect(struct serio *serio)
 126{
 127        struct warrior *warrior = serio_get_drvdata(serio);
 128
 129        serio_close(serio);
 130        serio_set_drvdata(serio, NULL);
 131        input_unregister_device(warrior->dev);
 132        kfree(warrior);
 133}
 134
 135/*
 136 * warrior_connect() is the routine that is called when someone adds a
 137 * new serio device. It looks for the Warrior, and if found, registers
 138 * it as an input device.
 139 */
 140
 141static int warrior_connect(struct serio *serio, struct serio_driver *drv)
 142{
 143        struct warrior *warrior;
 144        struct input_dev *input_dev;
 145        int err = -ENOMEM;
 146
 147        warrior = kzalloc(sizeof(struct warrior), GFP_KERNEL);
 148        input_dev = input_allocate_device();
 149        if (!warrior || !input_dev)
 150                goto fail1;
 151
 152        warrior->dev = input_dev;
 153        snprintf(warrior->phys, sizeof(warrior->phys), "%s/input0", serio->phys);
 154
 155        input_dev->name = "Logitech WingMan Warrior";
 156        input_dev->phys = warrior->phys;
 157        input_dev->id.bustype = BUS_RS232;
 158        input_dev->id.vendor = SERIO_WARRIOR;
 159        input_dev->id.product = 0x0001;
 160        input_dev->id.version = 0x0100;
 161        input_dev->dev.parent = &serio->dev;
 162
 163        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) |
 164                BIT_MASK(EV_ABS);
 165        input_dev->keybit[BIT_WORD(BTN_TRIGGER)] = BIT_MASK(BTN_TRIGGER) |
 166                BIT_MASK(BTN_THUMB) | BIT_MASK(BTN_TOP) | BIT_MASK(BTN_TOP2);
 167        input_dev->relbit[0] = BIT_MASK(REL_DIAL);
 168        input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 8);
 169        input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 8);
 170        input_set_abs_params(input_dev, ABS_THROTTLE, -112, 112, 0, 0);
 171        input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
 172        input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
 173
 174        serio_set_drvdata(serio, warrior);
 175
 176        err = serio_open(serio, drv);
 177        if (err)
 178                goto fail2;
 179
 180        err = input_register_device(warrior->dev);
 181        if (err)
 182                goto fail3;
 183
 184        return 0;
 185
 186 fail3: serio_close(serio);
 187 fail2: serio_set_drvdata(serio, NULL);
 188 fail1: input_free_device(input_dev);
 189        kfree(warrior);
 190        return err;
 191}
 192
 193/*
 194 * The serio driver structure.
 195 */
 196
 197static struct serio_device_id warrior_serio_ids[] = {
 198        {
 199                .type   = SERIO_RS232,
 200                .proto  = SERIO_WARRIOR,
 201                .id     = SERIO_ANY,
 202                .extra  = SERIO_ANY,
 203        },
 204        { 0 }
 205};
 206
 207MODULE_DEVICE_TABLE(serio, warrior_serio_ids);
 208
 209static struct serio_driver warrior_drv = {
 210        .driver         = {
 211                .name   = "warrior",
 212        },
 213        .description    = DRIVER_DESC,
 214        .id_table       = warrior_serio_ids,
 215        .interrupt      = warrior_interrupt,
 216        .connect        = warrior_connect,
 217        .disconnect     = warrior_disconnect,
 218};
 219
 220/*
 221 * The functions for inserting/removing us as a module.
 222 */
 223
 224static int __init warrior_init(void)
 225{
 226        return serio_register_driver(&warrior_drv);
 227}
 228
 229static void __exit warrior_exit(void)
 230{
 231        serio_unregister_driver(&warrior_drv);
 232}
 233
 234module_init(warrior_init);
 235module_exit(warrior_exit);
 236