drivers/input/joystick/warrior.c

   1 /*
   2  * $Id: warrior.c,v 1.14 2002/01/22 20:32:10 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * Logitech WingMan Warrior joystick driver for Linux
   9  */
  10
  11 /*
  12  * This program is free warftware; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  *  Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/slab.h>
  34 #include <linux/input.h>
  35 #include <linux/serio.h>
  36 #include <linux/init.h>
  37
  38 #define DRIVER_DESC     "Logitech WingMan Warrior joystick driver"
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  41 MODULE_DESCRIPTION(DRIVER_DESC);
  42 MODULE_LICENSE("GPL");
  43
  44 /*
  45  * Constants.
  46  */
  47
  48 #define WARRIOR_MAX_LENGTH      16
  49 static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 };
  50
  51 /*
  52  * Per-Warrior data.
  53  */
  54
  55 struct warrior {
  56         struct input_dev *dev;
  57         int idx, len;
  58         unsigned char data[WARRIOR_MAX_LENGTH];
  59         char phys[32];
  60 };
  61
  62 /*
  63  * warrior_process_packet() decodes packets the driver receives from the
  64  * Warrior. It updates the data accordingly.
  65  */
  66
  67 static void warrior_process_packet(struct warrior *warrior)
  68 {
  69         struct input_dev *dev = warrior->dev;
  70         unsigned char *data = warrior->data;
  71
  72         if (!warrior->idx) return;
  73
  74         switch ((data[0] >> 4) & 7) {
  75                 case 1:                                 /* Button data */
  76                         input_report_key(dev, BTN_TRIGGER,  data[3]       & 1);
  77                         input_report_key(dev, BTN_THUMB,   (data[3] >> 1) & 1);
  78                         input_report_key(dev, BTN_TOP,     (data[3] >> 2) & 1);
  79                         input_report_key(dev, BTN_TOP2,    (data[3] >> 3) & 1);
  80                         break;
  81                 case 3:                                 /* XY-axis info->data */
  82                         input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
  83                         input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  84                         break;
  85                 case 5:                                 /* Throttle, spinner, hat info->data */
  86                         input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  87                         input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
  88                         input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
  89                         input_report_rel(dev, REL_DIAL,  (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
  90                         break;
  91         }
  92         input_sync(dev);
  93 }
  94
  95 /*
  96  * warrior_interrupt() is called by the low level driver when characters
  97  * are ready for us. We then buffer them for further processing, or call the
  98  * packet processing routine.
  99  */
 100
 101 static irqreturn_t warrior_interrupt(struct serio *serio,
 102                 unsigned char data, unsigned int flags)
 103 {
 104         struct warrior *warrior = serio_get_drvdata(serio);
 105
 106         if (data & 0x80) {
 107                 if (warrior->idx) warrior_process_packet(warrior);
 108                 warrior->idx = 0;
 109                 warrior->len = warrior_lengths[(data >> 4) & 7];
 110         }
 111
 112         if (warrior->idx < warrior->len)
 113                 warrior->data[warrior->idx++] = data;
 114
 115         if (warrior->idx == warrior->len) {
 116                 if (warrior->idx) warrior_process_packet(warrior);
 117                 warrior->idx = 0;
 118                 warrior->len = 0;
 119         }
 120         return IRQ_HANDLED;
 121 }
 122
 123 /*
 124  * warrior_disconnect() is the opposite of warrior_connect()
 125  */
 126
 127 static void warrior_disconnect(struct serio *serio)
 128 {
 129         struct warrior *warrior = serio_get_drvdata(serio);
 130
 131         serio_close(serio);
 132         serio_set_drvdata(serio, NULL);
 133         input_unregister_device(warrior->dev);
 134         kfree(warrior);
 135 }
 136
 137 /*
 138  * warrior_connect() is the routine that is called when someone adds a
 139  * new serio device. It looks for the Warrior, and if found, registers
 140  * it as an input device.
 141  */
 142
 143 static int warrior_connect(struct serio *serio, struct serio_driver *drv)
 144 {
 145         struct warrior *warrior;
 146         struct input_dev *input_dev;
 147         int err = -ENOMEM;
 148
 149         warrior = kzalloc(sizeof(struct warrior), GFP_KERNEL);
 150         input_dev = input_allocate_device();
 151         if (!warrior || !input_dev)
 152                 goto fail;
 153
 154         warrior->dev = input_dev;
 155         snprintf(warrior->phys, sizeof(warrior->phys), "%s/input0", serio->phys);
 156
 157         input_dev->name = "Logitech WingMan Warrior";
 158         input_dev->phys = warrior->phys;
 159         input_dev->id.bustype = BUS_RS232;
 160         input_dev->id.vendor = SERIO_WARRIOR;
 161         input_dev->id.product = 0x0001;
 162         input_dev->id.version = 0x0100;
 163         input_dev->cdev.dev = &serio->dev;
 164         input_dev->private = warrior;
 165
 166         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_ABS);
 167         input_dev->keybit[LONG(BTN_TRIGGER)] = BIT(BTN_TRIGGER) | BIT(BTN_THUMB) | BIT(BTN_TOP) | BIT(BTN_TOP2);
 168         input_dev->relbit[0] = BIT(REL_DIAL);
 169         input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 8);
 170         input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 8);
 171         input_set_abs_params(input_dev, ABS_THROTTLE, -112, 112, 0, 0);
 172         input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
 173         input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
 174
 175         serio_set_drvdata(serio, warrior);
 176
 177         err = serio_open(serio, drv);
 178         if (err)
 179                 goto fail;
 180
 181         input_register_device(warrior->dev);
 182         return 0;
 183
 184  fail:  serio_set_drvdata(serio, NULL);
 185         input_free_device(input_dev);
 186         kfree(warrior);
 187         return err;
 188 }
 189
 190 /*
 191  * The serio driver structure.
 192  */
 193
 194 static struct serio_device_id warrior_serio_ids[] = {
 195         {
 196                 .type   = SERIO_RS232,
 197                 .proto  = SERIO_WARRIOR,
 198                 .id     = SERIO_ANY,
 199                 .extra  = SERIO_ANY,
 200         },
 201         { 0 }
 202 };
 203
 204 MODULE_DEVICE_TABLE(serio, warrior_serio_ids);
 205
 206 static struct serio_driver warrior_drv = {
 207         .driver         = {
 208                 .name   = "warrior",
 209         },
 210         .description    = DRIVER_DESC,
 211         .id_table       = warrior_serio_ids,
 212         .interrupt      = warrior_interrupt,
 213         .connect        = warrior_connect,
 214         .disconnect     = warrior_disconnect,
 215 };
 216
 217 /*
 218  * The functions for inserting/removing us as a module.
 219  */
 220
 221 static int __init warrior_init(void)
 222 {
 223         serio_register_driver(&warrior_drv);
 224         return 0;
 225 }
 226
 227 static void __exit warrior_exit(void)
 228 {
 229         serio_unregister_driver(&warrior_drv);
 230 }
 231
 232 module_init(warrior_init);
 233 module_exit(warrior_exit);