drivers/input/joystick/gf2k.c

   1 /*
   2  *  Copyright (c) 1998-2001 Vojtech Pavlik
   3  */
   4
   5 /*
   6  * Genius Flight 2000 joystick driver for Linux
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27  */
  28
  29 #include <linux/delay.h>
  30 #include <linux/kernel.h>
  31 #include <linux/slab.h>
  32 #include <linux/module.h>
  33 #include <linux/init.h>
  34 #include <linux/input.h>
  35 #include <linux/gameport.h>
  36 #include <linux/jiffies.h>
  37
  38 #define DRIVER_DESC     "Genius Flight 2000 joystick driver"
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  41 MODULE_DESCRIPTION(DRIVER_DESC);
  42 MODULE_LICENSE("GPL");
  43
  44 #define GF2K_START              400     /* The time we wait for the first bit [400 us] */
  45 #define GF2K_STROBE             40      /* The time we wait for the first bit [40 us] */
  46 #define GF2K_TIMEOUT            4       /* Wait for everything to settle [4 ms] */
  47 #define GF2K_LENGTH             80      /* Max number of triplets in a packet */
  48
  49 /*
  50  * Genius joystick ids ...
  51  */
  52
  53 #define GF2K_ID_G09             1
  54 #define GF2K_ID_F30D            2
  55 #define GF2K_ID_F30             3
  56 #define GF2K_ID_F31D            4
  57 #define GF2K_ID_F305            5
  58 #define GF2K_ID_F23P            6
  59 #define GF2K_ID_F31             7
  60 #define GF2K_ID_MAX             7
  61
  62 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
  63 static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  64
  65 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
  66                                 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
  67 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
  68 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
  69 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
  70 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
  71 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
  72
  73 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
  74 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
  75 static short gf2k_btn_pad[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_START, BTN_SELECT };
  76
  77
  78 static short gf2k_seq_reset[] = { 240, 340, 0 };
  79 static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
  80
  81 struct gf2k {
  82         struct gameport *gameport;
  83         struct input_dev *dev;
  84         int reads;
  85         int bads;
  86         unsigned char id;
  87         unsigned char length;
  88         char phys[32];
  89 };
  90
  91 /*
  92  * gf2k_read_packet() reads a Genius Flight2000 packet.
  93  */
  94
  95 static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
  96 {
  97         unsigned char u, v;
  98         int i;
  99         unsigned int t, p;
 100         unsigned long flags;
 101
 102         t = gameport_time(gameport, GF2K_START);
 103         p = gameport_time(gameport, GF2K_STROBE);
 104
 105         i = 0;
 106
 107         local_irq_save(flags);
 108
 109         gameport_trigger(gameport);
 110         v = gameport_read(gameport);
 111
 112         while (t > 0 && i < length) {
 113                 t--; u = v;
 114                 v = gameport_read(gameport);
 115                 if (v & ~u & 0x10) {
 116                         data[i++] = v >> 5;
 117                         t = p;
 118                 }
 119         }
 120
 121         local_irq_restore(flags);
 122
 123         return i;
 124 }
 125
 126 /*
 127  * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
 128  * into digital mode.
 129  */
 130
 131 static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
 132 {
 133
 134         unsigned long flags;
 135         int i, t;
 136
 137         local_irq_save(flags);
 138
 139         i = 0;
 140         do {
 141                 gameport_trigger(gameport);
 142                 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
 143                 while ((gameport_read(gameport) & 1) && t) t--;
 144                 udelay(seq[i]);
 145         } while (seq[++i]);
 146
 147         gameport_trigger(gameport);
 148
 149         local_irq_restore(flags);
 150 }
 151
 152 /*
 153  * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
 154  * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
 155  * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
 156  * is number of bits per triplet.
 157  */
 158
 159 #define GB(p,n,s)       gf2k_get_bits(data, p, n, s)
 160
 161 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
 162 {
 163         __u64 data = 0;
 164         int i;
 165
 166         for (i = 0; i < num / 3 + 2; i++)
 167                 data |= buf[pos / 3 + i] << (i * 3);
 168         data >>= pos % 3;
 169         data &= (1 << num) - 1;
 170         data <<= shift;
 171
 172         return data;
 173 }
 174
 175 static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
 176 {
 177         struct input_dev *dev = gf2k->dev;
 178         int i, t;
 179
 180         for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
 181                 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
 182
 183         for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
 184                 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
 185
 186         t = GB(40,4,0);
 187
 188         for (i = 0; i < gf2k_hats[gf2k->id]; i++)
 189                 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
 190
 191         t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
 192
 193         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 194                 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
 195
 196         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 197                 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
 198
 199         input_sync(dev);
 200 }
 201
 202 /*
 203  * gf2k_poll() reads and analyzes Genius joystick data.
 204  */
 205
 206 static void gf2k_poll(struct gameport *gameport)
 207 {
 208         struct gf2k *gf2k = gameport_get_drvdata(gameport);
 209         unsigned char data[GF2K_LENGTH];
 210
 211         gf2k->reads++;
 212
 213         if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
 214                 gf2k->bads++;
 215         else
 216                 gf2k_read(gf2k, data);
 217 }
 218
 219 static int gf2k_open(struct input_dev *dev)
 220 {
 221         struct gf2k *gf2k = input_get_drvdata(dev);
 222
 223         gameport_start_polling(gf2k->gameport);
 224         return 0;
 225 }
 226
 227 static void gf2k_close(struct input_dev *dev)
 228 {
 229         struct gf2k *gf2k = input_get_drvdata(dev);
 230
 231         gameport_stop_polling(gf2k->gameport);
 232 }
 233
 234 /*
 235  * gf2k_connect() probes for Genius id joysticks.
 236  */
 237
 238 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
 239 {
 240         struct gf2k *gf2k;
 241         struct input_dev *input_dev;
 242         unsigned char data[GF2K_LENGTH];
 243         int i, err;
 244
 245         gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL);
 246         input_dev = input_allocate_device();
 247         if (!gf2k || !input_dev) {
 248                 err = -ENOMEM;
 249                 goto fail1;
 250         }
 251
 252         gf2k->gameport = gameport;
 253         gf2k->dev = input_dev;
 254
 255         gameport_set_drvdata(gameport, gf2k);
 256
 257         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 258         if (err)
 259                 goto fail1;
 260
 261         gf2k_trigger_seq(gameport, gf2k_seq_reset);
 262
 263         msleep(GF2K_TIMEOUT);
 264
 265         gf2k_trigger_seq(gameport, gf2k_seq_digital);
 266
 267         msleep(GF2K_TIMEOUT);
 268
 269         if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
 270                 err = -ENODEV;
 271                 goto fail2;
 272         }
 273
 274         if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
 275                 err = -ENODEV;
 276                 goto fail2;
 277         }
 278
 279 #ifdef RESET_WORKS
 280         if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) &&
 281             (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
 282                 err = -ENODEV;
 283                 goto fail2;
 284         }
 285 #else
 286         gf2k->id = 6;
 287 #endif
 288
 289         if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
 290                 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
 291                         gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
 292                 err = -ENODEV;
 293                 goto fail2;
 294         }
 295
 296         gameport_set_poll_handler(gameport, gf2k_poll);
 297         gameport_set_poll_interval(gameport, 20);
 298
 299         snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys);
 300
 301         gf2k->length = gf2k_lens[gf2k->id];
 302
 303         input_dev->name = gf2k_names[gf2k->id];
 304         input_dev->phys = gf2k->phys;
 305         input_dev->id.bustype = BUS_GAMEPORT;
 306         input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
 307         input_dev->id.product = gf2k->id;
 308         input_dev->id.version = 0x0100;
 309         input_dev->dev.parent = &gameport->dev;
 310
 311         input_set_drvdata(input_dev, gf2k);
 312
 313         input_dev->open = gf2k_open;
 314         input_dev->close = gf2k_close;
 315
 316         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 317
 318         for (i = 0; i < gf2k_axes[gf2k->id]; i++)
 319                 set_bit(gf2k_abs[i], input_dev->absbit);
 320
 321         for (i = 0; i < gf2k_hats[gf2k->id]; i++)
 322                 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 323
 324         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 325                 set_bit(gf2k_btn_joy[i], input_dev->keybit);
 326
 327         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 328                 set_bit(gf2k_btn_pad[i], input_dev->keybit);
 329
 330         gf2k_read_packet(gameport, gf2k->length, data);
 331         gf2k_read(gf2k, data);
 332
 333         for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
 334                 int max = i < 2 ?
 335                         input_abs_get_val(input_dev, gf2k_abs[i]) * 2 :
 336                         input_abs_get_val(input_dev, gf2k_abs[0]) +
 337                                 input_abs_get_val(input_dev, gf2k_abs[1]);
 338                 int flat = i < 2 ? 24 : 0;
 339
 340                 input_set_abs_params(input_dev, gf2k_abs[i],
 341                                      32, max - 32, 8, flat);
 342         }
 343
 344         err = input_register_device(gf2k->dev);
 345         if (err)
 346                 goto fail2;
 347
 348         return 0;
 349
 350  fail2: gameport_close(gameport);
 351  fail1: gameport_set_drvdata(gameport, NULL);
 352         input_free_device(input_dev);
 353         kfree(gf2k);
 354         return err;
 355 }
 356
 357 static void gf2k_disconnect(struct gameport *gameport)
 358 {
 359         struct gf2k *gf2k = gameport_get_drvdata(gameport);
 360
 361         input_unregister_device(gf2k->dev);
 362         gameport_close(gameport);
 363         gameport_set_drvdata(gameport, NULL);
 364         kfree(gf2k);
 365 }
 366
 367 static struct gameport_driver gf2k_drv = {
 368         .driver         = {
 369                 .name   = "gf2k",
 370         },
 371         .description    = DRIVER_DESC,
 372         .connect        = gf2k_connect,
 373         .disconnect     = gf2k_disconnect,
 374 };
 375
 376 static int __init gf2k_init(void)
 377 {
 378         return gameport_register_driver(&gf2k_drv);
 379 }
 380
 381 static void __exit gf2k_exit(void)
 382 {
 383         gameport_unregister_driver(&gf2k_drv);
 384 }
 385
 386 module_init(gf2k_init);
 387 module_exit(gf2k_exit);