drivers/input/joystick/interact.c

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