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/init.h>
  37 #include <linux/gameport.h>
  38 #include <linux/input.h>
  39 #include <linux/jiffies.h>
  40
  41 #define DRIVER_DESC     "InterAct digital joystick driver"
  42
  43 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  44 MODULE_DESCRIPTION(DRIVER_DESC);
  45 MODULE_LICENSE("GPL");
  46
  47 #define INTERACT_MAX_START      600     /* 400 us */
  48 #define INTERACT_MAX_STROBE     60      /* 40 us */
  49 #define INTERACT_MAX_LENGTH     32      /* 32 bits */
  50
  51 #define INTERACT_TYPE_HHFX      0       /* HammerHead/FX */
  52 #define INTERACT_TYPE_PP8D      1       /* ProPad 8 */
  53
  54 struct interact {
  55         struct gameport *gameport;
  56         struct input_dev *dev;
  57         int bads;
  58         int reads;
  59         unsigned char type;
  60         unsigned char length;
  61         char phys[32];
  62 };
  63
  64 static short interact_abs_hhfx[] =
  65         { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 };
  66 static short interact_abs_pp8d[] =
  67         { ABS_X, ABS_Y, -1 };
  68
  69 static short interact_btn_hhfx[] =
  70         { 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 };
  71 static short interact_btn_pp8d[] =
  72         { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 };
  73
  74 struct interact_type {
  75         int id;
  76         short *abs;
  77         short *btn;
  78         char *name;
  79         unsigned char length;
  80         unsigned char b8;
  81 };
  82
  83 static struct interact_type interact_type[] = {
  84         { 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX",    32, 4 },
  85         { 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 },
  86         { 0 }};
  87
  88 /*
  89  * interact_read_packet() reads and InterAct joystick data.
  90  */
  91
  92 static int interact_read_packet(struct gameport *gameport, int length, u32 *data)
  93 {
  94         unsigned long flags;
  95         unsigned char u, v;
  96         unsigned int t, s;
  97         int i;
  98
  99         i = 0;
 100         data[0] = data[1] = data[2] = 0;
 101         t = gameport_time(gameport, INTERACT_MAX_START);
 102         s = gameport_time(gameport, INTERACT_MAX_STROBE);
 103
 104         local_irq_save(flags);
 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         local_irq_restore(flags);
 121
 122         return i;
 123 }
 124
 125 /*
 126  * interact_poll() reads and analyzes InterAct joystick data.
 127  */
 128
 129 static void interact_poll(struct gameport *gameport)
 130 {
 131         struct interact *interact = gameport_get_drvdata(gameport);
 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
 177         input_sync(dev);
 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 = input_get_drvdata(dev);
 187
 188         gameport_start_polling(interact->gameport);
 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 = input_get_drvdata(dev);
 199
 200         gameport_stop_polling(interact->gameport);
 201 }
 202
 203 /*
 204  * interact_connect() probes for InterAct joysticks.
 205  */
 206
 207 static int interact_connect(struct gameport *gameport, struct gameport_driver *drv)
 208 {
 209         struct interact *interact;
 210         struct input_dev *input_dev;
 211         __u32 data[3];
 212         int i, t;
 213         int err;
 214
 215         interact = kzalloc(sizeof(struct interact), GFP_KERNEL);
 216         input_dev = input_allocate_device();
 217         if (!interact || !input_dev) {
 218                 err = -ENOMEM;
 219                 goto fail1;
 220         }
 221
 222         interact->gameport = gameport;
 223         interact->dev = input_dev;
 224
 225         gameport_set_drvdata(gameport, interact);
 226
 227         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 228         if (err)
 229                 goto fail1;
 230
 231         i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data);
 232
 233         if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) {
 234                 err = -ENODEV;
 235                 goto fail2;
 236         }
 237
 238         for (i = 0; interact_type[i].length; i++)
 239                 if (interact_type[i].id == (data[2] >> 16))
 240                         break;
 241
 242         if (!interact_type[i].length) {
 243                 printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n",
 244                         gameport->phys, i, data[0], data[1], data[2]);
 245                 err = -ENODEV;
 246                 goto fail2;
 247         }
 248
 249         gameport_set_poll_handler(gameport, interact_poll);
 250         gameport_set_poll_interval(gameport, 20);
 251
 252         snprintf(interact->phys, sizeof(interact->phys), "%s/input0", gameport->phys);
 253
 254         interact->type = i;
 255         interact->length = interact_type[i].length;
 256
 257         input_dev->name = interact_type[i].name;
 258         input_dev->phys = interact->phys;
 259         input_dev->id.bustype = BUS_GAMEPORT;
 260         input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT;
 261         input_dev->id.product = interact_type[i].id;
 262         input_dev->id.version = 0x0100;
 263         input_dev->dev.parent = &gameport->dev;
 264
 265         input_set_drvdata(input_dev, interact);
 266
 267         input_dev->open = interact_open;
 268         input_dev->close = interact_close;
 269
 270         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 271
 272         for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) {
 273                 if (i < interact_type[interact->type].b8)
 274                         input_set_abs_params(input_dev, t, 0, 255, 0, 0);
 275                 else
 276                         input_set_abs_params(input_dev, t, -1, 1, 0, 0);
 277         }
 278
 279         for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++)
 280                 __set_bit(t, input_dev->keybit);
 281
 282         err = input_register_device(interact->dev);
 283         if (err)
 284                 goto fail2;
 285
 286         return 0;
 287
 288 fail2:  gameport_close(gameport);
 289 fail1:  gameport_set_drvdata(gameport, NULL);
 290         input_free_device(input_dev);
 291         kfree(interact);
 292         return err;
 293 }
 294
 295 static void interact_disconnect(struct gameport *gameport)
 296 {
 297         struct interact *interact = gameport_get_drvdata(gameport);
 298
 299         input_unregister_device(interact->dev);
 300         gameport_close(gameport);
 301         gameport_set_drvdata(gameport, NULL);
 302         kfree(interact);
 303 }
 304
 305 static struct gameport_driver interact_drv = {
 306         .driver         = {
 307                 .name   = "interact",
 308         },
 309         .description    = DRIVER_DESC,
 310         .connect        = interact_connect,
 311         .disconnect     = interact_disconnect,
 312 };
 313
 314 module_gameport_driver(interact_drv);