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
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/slab.h>
  28 #include <linux/input.h>
  29 #include <linux/serio.h>
  30
  31 #define DRIVER_DESC     "Logitech WingMan Warrior joystick driver"
  32
  33 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  34 MODULE_DESCRIPTION(DRIVER_DESC);
  35 MODULE_LICENSE("GPL");
  36
  37 /*
  38  * Constants.
  39  */
  40
  41 #define WARRIOR_MAX_LENGTH      16
  42 static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 };
  43
  44 /*
  45  * Per-Warrior data.
  46  */
  47
  48 struct warrior {
  49         struct input_dev *dev;
  50         int idx, len;
  51         unsigned char data[WARRIOR_MAX_LENGTH];
  52         char phys[32];
  53 };
  54
  55 /*
  56  * warrior_process_packet() decodes packets the driver receives from the
  57  * Warrior. It updates the data accordingly.
  58  */
  59
  60 static void warrior_process_packet(struct warrior *warrior)
  61 {
  62         struct input_dev *dev = warrior->dev;
  63         unsigned char *data = warrior->data;
  64
  65         if (!warrior->idx) return;
  66
  67         switch ((data[0] >> 4) & 7) {
  68                 case 1:                                 /* Button data */
  69                         input_report_key(dev, BTN_TRIGGER,  data[3]       & 1);
  70                         input_report_key(dev, BTN_THUMB,   (data[3] >> 1) & 1);
  71                         input_report_key(dev, BTN_TOP,     (data[3] >> 2) & 1);
  72                         input_report_key(dev, BTN_TOP2,    (data[3] >> 3) & 1);
  73                         break;
  74                 case 3:                                 /* XY-axis info->data */
  75                         input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
  76                         input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  77                         break;
  78                 case 5:                                 /* Throttle, spinner, hat info->data */
  79                         input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  80                         input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
  81                         input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
  82                         input_report_rel(dev, REL_DIAL,  (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
  83                         break;
  84         }
  85         input_sync(dev);
  86 }
  87
  88 /*
  89  * warrior_interrupt() is called by the low level driver when characters
  90  * are ready for us. We then buffer them for further processing, or call the
  91  * packet processing routine.
  92  */
  93
  94 static irqreturn_t warrior_interrupt(struct serio *serio,
  95                 unsigned char data, unsigned int flags)
  96 {
  97         struct warrior *warrior = serio_get_drvdata(serio);
  98
  99         if (data & 0x80) {
 100                 if (warrior->idx) warrior_process_packet(warrior);
 101                 warrior->idx = 0;
 102                 warrior->len = warrior_lengths[(data >> 4) & 7];
 103         }
 104
 105         if (warrior->idx < warrior->len)
 106                 warrior->data[warrior->idx++] = data;
 107
 108         if (warrior->idx == warrior->len) {
 109                 if (warrior->idx) warrior_process_packet(warrior);
 110                 warrior->idx = 0;
 111                 warrior->len = 0;
 112         }
 113         return IRQ_HANDLED;
 114 }
 115
 116 /*
 117  * warrior_disconnect() is the opposite of warrior_connect()
 118  */
 119
 120 static void warrior_disconnect(struct serio *serio)
 121 {
 122         struct warrior *warrior = serio_get_drvdata(serio);
 123
 124         serio_close(serio);
 125         serio_set_drvdata(serio, NULL);
 126         input_unregister_device(warrior->dev);
 127         kfree(warrior);
 128 }
 129
 130 /*
 131  * warrior_connect() is the routine that is called when someone adds a
 132  * new serio device. It looks for the Warrior, and if found, registers
 133  * it as an input device.
 134  */
 135
 136 static int warrior_connect(struct serio *serio, struct serio_driver *drv)
 137 {
 138         struct warrior *warrior;
 139         struct input_dev *input_dev;
 140         int err = -ENOMEM;
 141
 142         warrior = kzalloc(sizeof(struct warrior), GFP_KERNEL);
 143         input_dev = input_allocate_device();
 144         if (!warrior || !input_dev)
 145                 goto fail1;
 146
 147         warrior->dev = input_dev;
 148         snprintf(warrior->phys, sizeof(warrior->phys), "%s/input0", serio->phys);
 149
 150         input_dev->name = "Logitech WingMan Warrior";
 151         input_dev->phys = warrior->phys;
 152         input_dev->id.bustype = BUS_RS232;
 153         input_dev->id.vendor = SERIO_WARRIOR;
 154         input_dev->id.product = 0x0001;
 155         input_dev->id.version = 0x0100;
 156         input_dev->dev.parent = &serio->dev;
 157
 158         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) |
 159                 BIT_MASK(EV_ABS);
 160         input_dev->keybit[BIT_WORD(BTN_TRIGGER)] = BIT_MASK(BTN_TRIGGER) |
 161                 BIT_MASK(BTN_THUMB) | BIT_MASK(BTN_TOP) | BIT_MASK(BTN_TOP2);
 162         input_dev->relbit[0] = BIT_MASK(REL_DIAL);
 163         input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 8);
 164         input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 8);
 165         input_set_abs_params(input_dev, ABS_THROTTLE, -112, 112, 0, 0);
 166         input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
 167         input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
 168
 169         serio_set_drvdata(serio, warrior);
 170
 171         err = serio_open(serio, drv);
 172         if (err)
 173                 goto fail2;
 174
 175         err = input_register_device(warrior->dev);
 176         if (err)
 177                 goto fail3;
 178
 179         return 0;
 180
 181  fail3: serio_close(serio);
 182  fail2: serio_set_drvdata(serio, NULL);
 183  fail1: input_free_device(input_dev);
 184         kfree(warrior);
 185         return err;
 186 }
 187
 188 /*
 189  * The serio driver structure.
 190  */
 191
 192 static const struct serio_device_id warrior_serio_ids[] = {
 193         {
 194                 .type   = SERIO_RS232,
 195                 .proto  = SERIO_WARRIOR,
 196                 .id     = SERIO_ANY,
 197                 .extra  = SERIO_ANY,
 198         },
 199         { 0 }
 200 };
 201
 202 MODULE_DEVICE_TABLE(serio, warrior_serio_ids);
 203
 204 static struct serio_driver warrior_drv = {
 205         .driver         = {
 206                 .name   = "warrior",
 207         },
 208         .description    = DRIVER_DESC,
 209         .id_table       = warrior_serio_ids,
 210         .interrupt      = warrior_interrupt,
 211         .connect        = warrior_connect,
 212         .disconnect     = warrior_disconnect,
 213 };
 214
 215 module_serio_driver(warrior_drv);