drivers/input/joystick/warrior.c

   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
  38 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  39 MODULE_DESCRIPTION(DRIVER_DESC);
  40 MODULE_LICENSE("GPL");
  41
  42 /*
  43  * Constants.
  44  */
  45
  46 #define WARRIOR_MAX_LENGTH      16
  47 static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 };
  48
  49 /*
  50  * Per-Warrior data.
  51  */
  52
  53 struct 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
  65 static 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
  99 static 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
 125 static 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
 141 static 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
 197 static 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
 207 MODULE_DEVICE_TABLE(serio, warrior_serio_ids);
 208
 209 static 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
 224 static int __init warrior_init(void)
 225 {
 226         return serio_register_driver(&warrior_drv);
 227 }
 228
 229 static void __exit warrior_exit(void)
 230 {
 231         serio_unregister_driver(&warrior_drv);
 232 }
 233
 234 module_init(warrior_init);
 235 module_exit(warrior_exit);