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  * Should you need to contact me, the author, you can do so either by
  28  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  29  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/slab.h>
  34 #include <linux/module.h>
  35 #include <linux/delay.h>
  36 #include <linux/gameport.h>
  37 #include <linux/input.h>
  38 #include <linux/jiffies.h>
  39
  40 #define DRIVER_DESC     "InterAct digital joystick driver"
  41
  42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  43 MODULE_DESCRIPTION(DRIVER_DESC);
  44 MODULE_LICENSE("GPL");
  45
  46 #define INTERACT_MAX_START      600     /* 400 us */
  47 #define INTERACT_MAX_STROBE     60      /* 40 us */
  48 #define INTERACT_MAX_LENGTH     32      /* 32 bits */
  49
  50 #define INTERACT_TYPE_HHFX      0       /* HammerHead/FX */
  51 #define INTERACT_TYPE_PP8D      1       /* ProPad 8 */
  52
  53 struct interact {
  54         struct gameport *gameport;
  55         struct input_dev *dev;
  56         int bads;
  57         int reads;
  58         unsigned char type;
  59         unsigned char length;
  60         char phys[32];
  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         local_irq_save(flags);
 104         gameport_trigger(gameport);
 105         v = gameport_read(gameport);
 106
 107         while (t > 0 && i < length) {
 108                 t--;
 109                 u = v; v = gameport_read(gameport);
 110                 if (v & ~u & 0x40) {
 111                         data[0] = (data[0] << 1) | ((v >> 4) & 1);
 112                         data[1] = (data[1] << 1) | ((v >> 5) & 1);
 113                         data[2] = (data[2] << 1) | ((v >> 7) & 1);
 114                         i++;
 115                         t = s;
 116                 }
 117         }
 118
 119         local_irq_restore(flags);
 120
 121         return i;
 122 }
 123
 124 /*
 125  * interact_poll() reads and analyzes InterAct joystick data.
 126  */
 127
 128 static void interact_poll(struct gameport *gameport)
 129 {
 130         struct interact *interact = gameport_get_drvdata(gameport);
 131         struct input_dev *dev = interact->dev;
 132         u32 data[3];
 133         int i;
 134
 135         interact->reads++;
 136
 137         if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) {
 138                 interact->bads++;
 139         } else {
 140
 141                 for (i = 0; i < 3; i++)
 142                         data[i] <<= INTERACT_MAX_LENGTH - interact->length;
 143
 144                 switch (interact->type) {
 145
 146                         case INTERACT_TYPE_HHFX:
 147
 148                                 for (i = 0; i < 4; i++)
 149                                         input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff);
 150
 151                                 for (i = 0; i < 2; i++)
 152                                         input_report_abs(dev, ABS_HAT0Y - i,
 153                                                 ((data[1] >> ((i << 1) + 17)) & 1)  - ((data[1] >> ((i << 1) + 16)) & 1));
 154
 155                                 for (i = 0; i < 8; i++)
 156                                         input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1);
 157
 158                                 for (i = 0; i < 4; i++)
 159                                         input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1);
 160
 161                                 break;
 162
 163                         case INTERACT_TYPE_PP8D:
 164
 165                                 for (i = 0; i < 2; i++)
 166                                         input_report_abs(dev, interact_abs_pp8d[i],
 167                                                 ((data[0] >> ((i << 1) + 20)) & 1)  - ((data[0] >> ((i << 1) + 21)) & 1));
 168
 169                                 for (i = 0; i < 8; i++)
 170                                         input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1);
 171
 172                                 break;
 173                 }
 174         }
 175
 176         input_sync(dev);
 177 }
 178
 179 /*
 180  * interact_open() is a callback from the input open routine.
 181  */
 182
 183 static int interact_open(struct input_dev *dev)
 184 {
 185         struct interact *interact = input_get_drvdata(dev);
 186
 187         gameport_start_polling(interact->gameport);
 188         return 0;
 189 }
 190
 191 /*
 192  * interact_close() is a callback from the input close routine.
 193  */
 194
 195 static void interact_close(struct input_dev *dev)
 196 {
 197         struct interact *interact = input_get_drvdata(dev);
 198
 199         gameport_stop_polling(interact->gameport);
 200 }
 201
 202 /*
 203  * interact_connect() probes for InterAct joysticks.
 204  */
 205
 206 static int interact_connect(struct gameport *gameport, struct gameport_driver *drv)
 207 {
 208         struct interact *interact;
 209         struct input_dev *input_dev;
 210         __u32 data[3];
 211         int i, t;
 212         int err;
 213
 214         interact = kzalloc(sizeof(struct interact), GFP_KERNEL);
 215         input_dev = input_allocate_device();
 216         if (!interact || !input_dev) {
 217                 err = -ENOMEM;
 218                 goto fail1;
 219         }
 220
 221         interact->gameport = gameport;
 222         interact->dev = input_dev;
 223
 224         gameport_set_drvdata(gameport, interact);
 225
 226         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 227         if (err)
 228                 goto fail1;
 229
 230         i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data);
 231
 232         if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) {
 233                 err = -ENODEV;
 234                 goto fail2;
 235         }
 236
 237         for (i = 0; interact_type[i].length; i++)
 238                 if (interact_type[i].id == (data[2] >> 16))
 239                         break;
 240
 241         if (!interact_type[i].length) {
 242                 printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n",
 243                         gameport->phys, i, data[0], data[1], data[2]);
 244                 err = -ENODEV;
 245                 goto fail2;
 246         }
 247
 248         gameport_set_poll_handler(gameport, interact_poll);
 249         gameport_set_poll_interval(gameport, 20);
 250
 251         snprintf(interact->phys, sizeof(interact->phys), "%s/input0", gameport->phys);
 252
 253         interact->type = i;
 254         interact->length = interact_type[i].length;
 255
 256         input_dev->name = interact_type[i].name;
 257         input_dev->phys = interact->phys;
 258         input_dev->id.bustype = BUS_GAMEPORT;
 259         input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT;
 260         input_dev->id.product = interact_type[i].id;
 261         input_dev->id.version = 0x0100;
 262         input_dev->dev.parent = &gameport->dev;
 263
 264         input_set_drvdata(input_dev, interact);
 265
 266         input_dev->open = interact_open;
 267         input_dev->close = interact_close;
 268
 269         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 270
 271         for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) {
 272                 if (i < interact_type[interact->type].b8)
 273                         input_set_abs_params(input_dev, t, 0, 255, 0, 0);
 274                 else
 275                         input_set_abs_params(input_dev, t, -1, 1, 0, 0);
 276         }
 277
 278         for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++)
 279                 __set_bit(t, input_dev->keybit);
 280
 281         err = input_register_device(interact->dev);
 282         if (err)
 283                 goto fail2;
 284
 285         return 0;
 286
 287 fail2:  gameport_close(gameport);
 288 fail1:  gameport_set_drvdata(gameport, NULL);
 289         input_free_device(input_dev);
 290         kfree(interact);
 291         return err;
 292 }
 293
 294 static void interact_disconnect(struct gameport *gameport)
 295 {
 296         struct interact *interact = gameport_get_drvdata(gameport);
 297
 298         input_unregister_device(interact->dev);
 299         gameport_close(gameport);
 300         gameport_set_drvdata(gameport, NULL);
 301         kfree(interact);
 302 }
 303
 304 static struct gameport_driver interact_drv = {
 305         .driver         = {
 306                 .name   = "interact",
 307         },
 308         .description    = DRIVER_DESC,
 309         .connect        = interact_connect,
 310         .disconnect     = interact_disconnect,
 311 };
 312
 313 module_gameport_driver(interact_drv);