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, struct pt_regs *regs)
  68 {
  69         struct input_dev *dev = warrior->dev;
  70         unsigned char *data = warrior->data;
  71
  72         if (!warrior->idx) return;
  73
  74         input_regs(dev, regs);
  75
  76         switch ((data[0] >> 4) & 7) {
  77                 case 1:                                 /* Button data */
  78                         input_report_key(dev, BTN_TRIGGER,  data[3]       & 1);
  79                         input_report_key(dev, BTN_THUMB,   (data[3] >> 1) & 1);
  80                         input_report_key(dev, BTN_TOP,     (data[3] >> 2) & 1);
  81                         input_report_key(dev, BTN_TOP2,    (data[3] >> 3) & 1);
  82                         break;
  83                 case 3:                                 /* XY-axis info->data */
  84                         input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
  85                         input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  86                         break;
  87                 case 5:                                 /* Throttle, spinner, hat info->data */
  88                         input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  89                         input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
  90                         input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
  91                         input_report_rel(dev, REL_DIAL,  (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
  92                         break;
  93         }
  94         input_sync(dev);
  95 }
  96
  97 /*
  98  * warrior_interrupt() is called by the low level driver when characters
  99  * are ready for us. We then buffer them for further processing, or call the
 100  * packet processing routine.
 101  */
 102
 103 static irqreturn_t warrior_interrupt(struct serio *serio,
 104                 unsigned char data, unsigned int flags, struct pt_regs *regs)
 105 {
 106         struct warrior *warrior = serio_get_drvdata(serio);
 107
 108         if (data & 0x80) {
 109                 if (warrior->idx) warrior_process_packet(warrior, regs);
 110                 warrior->idx = 0;
 111                 warrior->len = warrior_lengths[(data >> 4) & 7];
 112         }
 113
 114         if (warrior->idx < warrior->len)
 115                 warrior->data[warrior->idx++] = data;
 116
 117         if (warrior->idx == warrior->len) {
 118                 if (warrior->idx) warrior_process_packet(warrior, regs);
 119                 warrior->idx = 0;
 120                 warrior->len = 0;
 121         }
 122         return IRQ_HANDLED;
 123 }
 124
 125 /*
 126  * warrior_disconnect() is the opposite of warrior_connect()
 127  */
 128
 129 static void warrior_disconnect(struct serio *serio)
 130 {
 131         struct warrior *warrior = serio_get_drvdata(serio);
 132
 133         serio_close(serio);
 134         serio_set_drvdata(serio, NULL);
 135         input_unregister_device(warrior->dev);
 136         kfree(warrior);
 137 }
 138
 139 /*
 140  * warrior_connect() is the routine that is called when someone adds a
 141  * new serio device. It looks for the Warrior, and if found, registers
 142  * it as an input device.
 143  */
 144
 145 static int warrior_connect(struct serio *serio, struct serio_driver *drv)
 146 {
 147         struct warrior *warrior;
 148         struct input_dev *input_dev;
 149         int err = -ENOMEM;
 150
 151         warrior = kzalloc(sizeof(struct warrior), GFP_KERNEL);
 152         input_dev = input_allocate_device();
 153         if (!warrior || !input_dev)
 154                 goto fail;
 155
 156         warrior->dev = input_dev;
 157         snprintf(warrior->phys, sizeof(warrior->phys), "%s/input0", serio->phys);
 158
 159         input_dev->name = "Logitech WingMan Warrior";
 160         input_dev->phys = warrior->phys;
 161         input_dev->id.bustype = BUS_RS232;
 162         input_dev->id.vendor = SERIO_WARRIOR;
 163         input_dev->id.product = 0x0001;
 164         input_dev->id.version = 0x0100;
 165         input_dev->cdev.dev = &serio->dev;
 166         input_dev->private = warrior;
 167
 168         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_ABS);
 169         input_dev->keybit[LONG(BTN_TRIGGER)] = BIT(BTN_TRIGGER) | BIT(BTN_THUMB) | BIT(BTN_TOP) | BIT(BTN_TOP2);
 170         input_dev->relbit[0] = BIT(REL_DIAL);
 171         input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 8);
 172         input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 8);
 173         input_set_abs_params(input_dev, ABS_THROTTLE, -112, 112, 0, 0);
 174         input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
 175         input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
 176
 177         serio_set_drvdata(serio, warrior);
 178
 179         err = serio_open(serio, drv);
 180         if (err)
 181                 goto fail;
 182
 183         input_register_device(warrior->dev);
 184         return 0;
 185
 186  fail:  serio_set_drvdata(serio, NULL);
 187         input_free_device(input_dev);
 188         kfree(warrior);
 189         return err;
 190 }
 191
 192 /*
 193  * The serio driver structure.
 194  */
 195
 196 static struct serio_device_id warrior_serio_ids[] = {
 197         {
 198                 .type   = SERIO_RS232,
 199                 .proto  = SERIO_WARRIOR,
 200                 .id     = SERIO_ANY,
 201                 .extra  = SERIO_ANY,
 202         },
 203         { 0 }
 204 };
 205
 206 MODULE_DEVICE_TABLE(serio, warrior_serio_ids);
 207
 208 static struct serio_driver warrior_drv = {
 209         .driver         = {
 210                 .name   = "warrior",
 211         },
 212         .description    = DRIVER_DESC,
 213         .id_table       = warrior_serio_ids,
 214         .interrupt      = warrior_interrupt,
 215         .connect        = warrior_connect,
 216         .disconnect     = warrior_disconnect,
 217 };
 218
 219 /*
 220  * The functions for inserting/removing us as a module.
 221  */
 222
 223 static int __init warrior_init(void)
 224 {
 225         serio_register_driver(&warrior_drv);
 226         return 0;
 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);