drivers/input/joystick/interact.c

   1 /*
   2  * $Id: interact.c,v 1.16 2002/01/22 20:28:25 vojtech Exp $
   3  *
   4  *  Copyright (c) 2001 Vojtech Pavlik
   5  *
   6  *  Based on the work of:
   7  *      Toby Deshane
   8  */
   9
  10 /*
  11  * InterAct digital gamepad/joystick driver for Linux
  12  */
  13
  14 /*
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  28  *
  29  * Should you need to contact me, the author, you can do so either by
  30  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  31  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  32  */
  33
  34 #include <linux/kernel.h>
  35 #include <linux/slab.h>
  36 #include <linux/module.h>
  37 #include <linux/delay.h>
  38 #include <linux/init.h>
  39 #include <linux/gameport.h>
  40 #include <linux/input.h>
  41 #include <linux/jiffies.h>
  42
  43 #define DRIVER_DESC     "InterAct digital joystick driver"
  44
  45 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  46 MODULE_DESCRIPTION(DRIVER_DESC);
  47 MODULE_LICENSE("GPL");
  48
  49 #define INTERACT_MAX_START      600     /* 400 us */
  50 #define INTERACT_MAX_STROBE     60      /* 40 us */
  51 #define INTERACT_MAX_LENGTH     32      /* 32 bits */
  52
  53 #define INTERACT_TYPE_HHFX      0       /* HammerHead/FX */
  54 #define INTERACT_TYPE_PP8D      1       /* ProPad 8 */
  55
  56 struct interact {
  57         struct gameport *gameport;
  58         struct input_dev *dev;
  59         int bads;
  60         int reads;
  61         unsigned char type;
  62         unsigned char length;
  63         char phys[32];
  64 };
  65
  66 static short interact_abs_hhfx[] =
  67         { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 };
  68 static short interact_abs_pp8d[] =
  69         { ABS_X, ABS_Y, -1 };
  70
  71 static short interact_btn_hhfx[] =
  72         { 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 };
  73 static short interact_btn_pp8d[] =
  74         { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 };
  75
  76 struct interact_type {
  77         int id;
  78         short *abs;
  79         short *btn;
  80         char *name;
  81         unsigned char length;
  82         unsigned char b8;
  83 };
  84
  85 static struct interact_type interact_type[] = {
  86         { 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX",    32, 4 },
  87         { 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 },
  88         { 0 }};
  89
  90 /*
  91  * interact_read_packet() reads and InterAct joystick data.
  92  */
  93
  94 static int interact_read_packet(struct gameport *gameport, int length, u32 *data)
  95 {
  96         unsigned long flags;
  97         unsigned char u, v;
  98         unsigned int t, s;
  99         int i;
 100
 101         i = 0;
 102         data[0] = data[1] = data[2] = 0;
 103         t = gameport_time(gameport, INTERACT_MAX_START);
 104         s = gameport_time(gameport, INTERACT_MAX_STROBE);
 105
 106         local_irq_save(flags);
 107         gameport_trigger(gameport);
 108         v = gameport_read(gameport);
 109
 110         while (t > 0 && i < length) {
 111                 t--;
 112                 u = v; v = gameport_read(gameport);
 113                 if (v & ~u & 0x40) {
 114                         data[0] = (data[0] << 1) | ((v >> 4) & 1);
 115                         data[1] = (data[1] << 1) | ((v >> 5) & 1);
 116                         data[2] = (data[2] << 1) | ((v >> 7) & 1);
 117                         i++;
 118                         t = s;
 119                 }
 120         }
 121
 122         local_irq_restore(flags);
 123
 124         return i;
 125 }
 126
 127 /*
 128  * interact_poll() reads and analyzes InterAct joystick data.
 129  */
 130
 131 static void interact_poll(struct gameport *gameport)
 132 {
 133         struct interact *interact = gameport_get_drvdata(gameport);
 134         struct input_dev *dev = interact->dev;
 135         u32 data[3];
 136         int i;
 137
 138         interact->reads++;
 139
 140         if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) {
 141                 interact->bads++;
 142         } else {
 143
 144                 for (i = 0; i < 3; i++)
 145                         data[i] <<= INTERACT_MAX_LENGTH - interact->length;
 146
 147                 switch (interact->type) {
 148
 149                         case INTERACT_TYPE_HHFX:
 150
 151                                 for (i = 0; i < 4; i++)
 152                                         input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff);
 153
 154                                 for (i = 0; i < 2; i++)
 155                                         input_report_abs(dev, ABS_HAT0Y - i,
 156                                                 ((data[1] >> ((i << 1) + 17)) & 1)  - ((data[1] >> ((i << 1) + 16)) & 1));
 157
 158                                 for (i = 0; i < 8; i++)
 159                                         input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1);
 160
 161                                 for (i = 0; i < 4; i++)
 162                                         input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1);
 163
 164                                 break;
 165
 166                         case INTERACT_TYPE_PP8D:
 167
 168                                 for (i = 0; i < 2; i++)
 169                                         input_report_abs(dev, interact_abs_pp8d[i],
 170                                                 ((data[0] >> ((i << 1) + 20)) & 1)  - ((data[0] >> ((i << 1) + 21)) & 1));
 171
 172                                 for (i = 0; i < 8; i++)
 173                                         input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1);
 174
 175                                 break;
 176                 }
 177         }
 178
 179         input_sync(dev);
 180 }
 181
 182 /*
 183  * interact_open() is a callback from the input open routine.
 184  */
 185
 186 static int interact_open(struct input_dev *dev)
 187 {
 188         struct interact *interact = input_get_drvdata(dev);
 189
 190         gameport_start_polling(interact->gameport);
 191         return 0;
 192 }
 193
 194 /*
 195  * interact_close() is a callback from the input close routine.
 196  */
 197
 198 static void interact_close(struct input_dev *dev)
 199 {
 200         struct interact *interact = input_get_drvdata(dev);
 201
 202         gameport_stop_polling(interact->gameport);
 203 }
 204
 205 /*
 206  * interact_connect() probes for InterAct joysticks.
 207  */
 208
 209 static int interact_connect(struct gameport *gameport, struct gameport_driver *drv)
 210 {
 211         struct interact *interact;
 212         struct input_dev *input_dev;
 213         __u32 data[3];
 214         int i, t;
 215         int err;
 216
 217         interact = kzalloc(sizeof(struct interact), GFP_KERNEL);
 218         input_dev = input_allocate_device();
 219         if (!interact || !input_dev) {
 220                 err = -ENOMEM;
 221                 goto fail1;
 222         }
 223
 224         interact->gameport = gameport;
 225         interact->dev = input_dev;
 226
 227         gameport_set_drvdata(gameport, interact);
 228
 229         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 230         if (err)
 231                 goto fail1;
 232
 233         i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data);
 234
 235         if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) {
 236                 err = -ENODEV;
 237                 goto fail2;
 238         }
 239
 240         for (i = 0; interact_type[i].length; i++)
 241                 if (interact_type[i].id == (data[2] >> 16))
 242                         break;
 243
 244         if (!interact_type[i].length) {
 245                 printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n",
 246                         gameport->phys, i, data[0], data[1], data[2]);
 247                 err = -ENODEV;
 248                 goto fail2;
 249         }
 250
 251         gameport_set_poll_handler(gameport, interact_poll);
 252         gameport_set_poll_interval(gameport, 20);
 253
 254         snprintf(interact->phys, sizeof(interact->phys), "%s/input0", gameport->phys);
 255
 256         interact->type = i;
 257         interact->length = interact_type[i].length;
 258
 259         input_dev->name = interact_type[i].name;
 260         input_dev->phys = interact->phys;
 261         input_dev->id.bustype = BUS_GAMEPORT;
 262         input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT;
 263         input_dev->id.product = interact_type[i].id;
 264         input_dev->id.version = 0x0100;
 265         input_dev->dev.parent = &gameport->dev;
 266
 267         input_set_drvdata(input_dev, interact);
 268
 269         input_dev->open = interact_open;
 270         input_dev->close = interact_close;
 271
 272         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 273
 274         for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) {
 275                 set_bit(t, input_dev->absbit);
 276                 if (i < interact_type[interact->type].b8) {
 277                         input_dev->absmin[t] = 0;
 278                         input_dev->absmax[t] = 255;
 279                 } else {
 280                         input_dev->absmin[t] = -1;
 281                         input_dev->absmax[t] = 1;
 282                 }
 283         }
 284
 285         for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++)
 286                 set_bit(t, input_dev->keybit);
 287
 288         err = input_register_device(interact->dev);
 289         if (err)
 290                 goto fail2;
 291
 292         return 0;
 293
 294 fail2:  gameport_close(gameport);
 295 fail1:  gameport_set_drvdata(gameport, NULL);
 296         input_free_device(input_dev);
 297         kfree(interact);
 298         return err;
 299 }
 300
 301 static void interact_disconnect(struct gameport *gameport)
 302 {
 303         struct interact *interact = gameport_get_drvdata(gameport);
 304
 305         input_unregister_device(interact->dev);
 306         gameport_close(gameport);
 307         gameport_set_drvdata(gameport, NULL);
 308         kfree(interact);
 309 }
 310
 311 static struct gameport_driver interact_drv = {
 312         .driver         = {
 313                 .name   = "interact",
 314         },
 315         .description    = DRIVER_DESC,
 316         .connect        = interact_connect,
 317         .disconnect     = interact_disconnect,
 318 };
 319
 320 static int __init interact_init(void)
 321 {
 322         gameport_register_driver(&interact_drv);
 323         return 0;
 324 }
 325
 326 static void __exit interact_exit(void)
 327 {
 328         gameport_unregister_driver(&interact_drv);
 329 }
 330
 331 module_init(interact_init);
 332 module_exit(interact_exit);