drivers/char/joystick/interact.c

   1 /*
   2  * $Id: interact.c,v 1.8 2000/05/29 11:19:51 vojtech Exp $
   3  *
   4  *  Copyright (c) 2000 Vojtech Pavlik
   5  *
   6  *  Based on the work of:
   7  *      Toby Deshane
   8  *
   9  *  Sponsored by SuSE
  10  */
  11
  12 /*
  13  * InterAct digital gamepad/joystick driver for Linux
  14  */
  15
  16 /*
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  30  *
  31  * Should you need to contact me, the author, you can do so either by
  32  * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
  33  * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
  34  */
  35
  36 #include <linux/kernel.h>
  37 #include <linux/malloc.h>
  38 #include <linux/module.h>
  39 #include <linux/delay.h>
  40 #include <linux/init.h>
  41 #include <linux/gameport.h>
  42 #include <linux/input.h>
  43
  44 #define INTERACT_MAX_START      400     /* 400 us */
  45 #define INTERACT_MAX_STROBE     40      /* 40 us */
  46 #define INTERACT_MAX_LENGTH     32      /* 32 bits */
  47 #define INTERACT_REFRESH_TIME   HZ/50   /* 20 ms */
  48
  49 #define INTERACT_TYPE_HHFX      0       /* HammerHead/FX */
  50 #define INTERACT_TYPE_PP8D      1       /* ProPad 8 */
  51
  52 struct interact {
  53         struct gameport *gameport;
  54         struct input_dev dev;
  55         struct timer_list timer;
  56         int used;
  57         int bads;
  58         int reads;
  59         unsigned char type;
  60         unsigned char length;
  61 };
  62
  63 static short interact_abs_hhfx[] =
  64         { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 };
  65 static short interact_abs_pp8d[] =
  66         { ABS_X, ABS_Y, -1 };
  67
  68 static short interact_btn_hhfx[] =
  69         { BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL, BTN_TL2, BTN_TR2, BTN_MODE, BTN_SELECT, -1 };
  70 static short interact_btn_pp8d[] =
  71         { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 };
  72
  73 struct interact_type {
  74         int id;
  75         short *abs;
  76         short *btn;
  77         char *name;
  78         unsigned char length;
  79         unsigned char b8;
  80 };
  81
  82 static struct interact_type interact_type[] = {
  83         { 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX",    32, 4 },
  84         { 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 },
  85         { 0 }};
  86
  87 /*
  88  * interact_read_packet() reads and InterAct joystick data.
  89  */
  90
  91 static int interact_read_packet(struct gameport *gameport, int length, u32 *data)
  92 {
  93         unsigned long flags;
  94         unsigned char u, v;
  95         unsigned int t, s;
  96         int i;
  97
  98         i = 0;
  99         data[0] = data[1] = data[2] = 0;
 100         t = gameport_time(gameport, INTERACT_MAX_START);
 101         s = gameport_time(gameport, INTERACT_MAX_STROBE);
 102
 103         __save_flags(flags);
 104         __cli();
 105         gameport_trigger(gameport);
 106         v = gameport_read(gameport);
 107
 108         while (t > 0 && i < length) {
 109                 t--;
 110                 u = v; v = gameport_read(gameport);
 111                 if (v & ~u & 0x40) {
 112                         data[0] = (data[0] << 1) | ((v >> 4) & 1);
 113                         data[1] = (data[1] << 1) | ((v >> 5) & 1);
 114                         data[2] = (data[2] << 1) | ((v >> 7) & 1);
 115                         i++;
 116                         t = s;
 117                 }
 118         }
 119
 120         __restore_flags(flags);
 121
 122         return i;
 123 }
 124
 125 /*
 126  * interact_timer() reads and analyzes InterAct joystick data.
 127  */
 128
 129 static void interact_timer(unsigned long private)
 130 {
 131         struct interact *interact = (struct interact *) private;
 132         struct input_dev *dev = &interact->dev;
 133         u32 data[3];
 134         int i;
 135
 136         interact->reads++;
 137
 138         if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) {
 139                 interact->bads++;
 140         } else
 141
 142         for (i = 0; i < 3; i++)
 143                 data[i] <<= INTERACT_MAX_LENGTH - interact->length;
 144
 145         switch (interact->type) {
 146
 147                 case INTERACT_TYPE_HHFX:
 148
 149                         for (i = 0; i < 4; i++)
 150                                 input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff);
 151
 152                         for (i = 0; i < 2; i++)
 153                                 input_report_abs(dev, ABS_HAT0Y - i,
 154                                         ((data[1] >> ((i << 1) + 17)) & 1)  - ((data[1] >> ((i << 1) + 16)) & 1));
 155
 156                         for (i = 0; i < 8; i++)
 157                                 input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1);
 158
 159                         for (i = 0; i < 4; i++)
 160                                 input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1);
 161
 162                         break;
 163
 164                 case INTERACT_TYPE_PP8D:
 165
 166                         for (i = 0; i < 2; i++)
 167                                 input_report_abs(dev, interact_abs_pp8d[i],
 168                                         ((data[0] >> ((i << 1) + 20)) & 1)  - ((data[0] >> ((i << 1) + 21)) & 1));
 169
 170                         for (i = 0; i < 8; i++)
 171                                 input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1);
 172
 173                         break;
 174         }
 175
 176         mod_timer(&interact->timer, jiffies + INTERACT_REFRESH_TIME);
 177
 178 }
 179
 180 /*
 181  * interact_open() is a callback from the input open routine.
 182  */
 183
 184 static int interact_open(struct input_dev *dev)
 185 {
 186         struct interact *interact = dev->private;
 187         if (!interact->used++)
 188                 mod_timer(&interact->timer, jiffies + INTERACT_REFRESH_TIME);
 189         return 0;
 190 }
 191
 192 /*
 193  * interact_close() is a callback from the input close routine.
 194  */
 195
 196 static void interact_close(struct input_dev *dev)
 197 {
 198         struct interact *interact = dev->private;
 199         if (!--interact->used)
 200                 del_timer(&interact->timer);
 201 }
 202
 203 /*
 204  * interact_connect() probes for InterAct joysticks.
 205  */
 206
 207 static void interact_connect(struct gameport *gameport, struct gameport_dev *dev)
 208 {
 209         struct interact *interact;
 210         __u32 data[3];
 211         int i, t;
 212
 213         if (!(interact = kmalloc(sizeof(struct interact), GFP_KERNEL)))
 214                 return;
 215         memset(interact, 0, sizeof(struct interact));
 216
 217         gameport->private = interact;
 218
 219         interact->gameport = gameport;
 220         init_timer(&interact->timer);
 221         interact->timer.data = (long) interact;
 222         interact->timer.function = interact_timer;
 223
 224         if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW))
 225                 goto fail1;
 226
 227         i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data);
 228
 229         if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) {
 230                 goto fail2;
 231         }
 232
 233         for (i = 0; interact_type[i].length; i++)
 234                 if (interact_type[i].id == (data[2] >> 16))
 235                         break;
 236
 237         if (!interact_type[i].length) {
 238                 printk(KERN_WARNING "interact.c: Unknown joystick on gameport%d. [len %d d0 %08x d1 %08x i2 %08x]\n",
 239                         gameport->number, i, data[0], data[1], data[2]);
 240                 goto fail2;
 241         }
 242
 243         interact->type = i;
 244         interact->length = interact_type[i].length;
 245
 246         interact->dev.private = interact;
 247         interact->dev.open = interact_open;
 248         interact->dev.close = interact_close;
 249
 250         interact->dev.name = interact_type[i].name;
 251         interact->dev.idbus = BUS_GAMEPORT;
 252         interact->dev.idvendor = GAMEPORT_ID_VENDOR_INTERACT;
 253         interact->dev.idproduct = interact_type[i].id;
 254         interact->dev.idversion = 0x0100;
 255
 256         interact->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 257
 258         for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) {
 259                 set_bit(t, interact->dev.absbit);
 260                 if (i < interact_type[interact->type].b8) {
 261                         interact->dev.absmin[t] = 0;
 262                         interact->dev.absmax[t] = 255;
 263                 } else {
 264                         interact->dev.absmin[t] = -1;
 265                         interact->dev.absmax[t] = 1;
 266                 }
 267         }
 268
 269         for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++)
 270                 set_bit(t, interact->dev.keybit);
 271
 272         input_register_device(&interact->dev);
 273         printk(KERN_INFO "input%d: %s on gameport%d.0\n",
 274                 interact->dev.number, interact_type[interact->type].name, gameport->number);
 275
 276         return;
 277 fail2:  gameport_close(gameport);
 278 fail1:  kfree(interact);
 279 }
 280
 281 static void interact_disconnect(struct gameport *gameport)
 282 {
 283         struct interact *interact = gameport->private;
 284         input_unregister_device(&interact->dev);
 285         gameport_close(gameport);
 286         kfree(interact);
 287 }
 288
 289 static struct gameport_dev interact_dev = {
 290         connect:        interact_connect,
 291         disconnect:     interact_disconnect,
 292 };
 293
 294 int __init interact_init(void)
 295 {
 296         gameport_register_device(&interact_dev);
 297         return 0;
 298 }
 299
 300 void __exit interact_exit(void)
 301 {
 302         gameport_unregister_device(&interact_dev);
 303 }
 304
 305 module_init(interact_init);
 306 module_exit(interact_exit);