drivers/input/joystick/gf2k.c

   1 /*
   2  * $Id: gf2k.c,v 1.19 2002/01/22 20:27:43 vojtech Exp $
   3  *
   4  *  Copyright (c) 1998-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * Genius Flight 2000 joystick driver for Linux
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  * Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/delay.h>
  32 #include <linux/kernel.h>
  33 #include <linux/slab.h>
  34 #include <linux/module.h>
  35 #include <linux/init.h>
  36 #include <linux/input.h>
  37 #include <linux/gameport.h>
  38
  39 #define DRIVER_DESC     "Genius Flight 2000 joystick driver"
  40
  41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  42 MODULE_DESCRIPTION(DRIVER_DESC);
  43 MODULE_LICENSE("GPL");
  44
  45 #define GF2K_START              400     /* The time we wait for the first bit [400 us] */
  46 #define GF2K_STROBE             40      /* The time we wait for the first bit [40 us] */
  47 #define GF2K_TIMEOUT            4       /* Wait for everything to settle [4 ms] */
  48 #define GF2K_LENGTH             80      /* Max number of triplets in a packet */
  49
  50 /*
  51  * Genius joystick ids ...
  52  */
  53
  54 #define GF2K_ID_G09             1
  55 #define GF2K_ID_F30D            2
  56 #define GF2K_ID_F30             3
  57 #define GF2K_ID_F31D            4
  58 #define GF2K_ID_F305            5
  59 #define GF2K_ID_F23P            6
  60 #define GF2K_ID_F31             7
  61 #define GF2K_ID_MAX             7
  62
  63 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
  64 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}};
  65
  66 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
  67                                 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
  68 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
  69 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
  70 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
  71 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
  72 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
  73
  74 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
  75 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
  76 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 };
  77
  78
  79 static short gf2k_seq_reset[] = { 240, 340, 0 };
  80 static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
  81
  82 struct gf2k {
  83         struct gameport *gameport;
  84         struct input_dev dev;
  85         int reads;
  86         int bads;
  87         unsigned char id;
  88         unsigned char length;
  89         char phys[32];
  90 };
  91
  92 /*
  93  * gf2k_read_packet() reads a Genius Flight2000 packet.
  94  */
  95
  96 static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
  97 {
  98         unsigned char u, v;
  99         int i;
 100         unsigned int t, p;
 101         unsigned long flags;
 102
 103         t = gameport_time(gameport, GF2K_START);
 104         p = gameport_time(gameport, GF2K_STROBE);
 105
 106         i = 0;
 107
 108         local_irq_save(flags);
 109
 110         gameport_trigger(gameport);
 111         v = gameport_read(gameport);
 112
 113         while (t > 0 && i < length) {
 114                 t--; u = v;
 115                 v = gameport_read(gameport);
 116                 if (v & ~u & 0x10) {
 117                         data[i++] = v >> 5;
 118                         t = p;
 119                 }
 120         }
 121
 122         local_irq_restore(flags);
 123
 124         return i;
 125 }
 126
 127 /*
 128  * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
 129  * into digital mode.
 130  */
 131
 132 static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
 133 {
 134
 135         unsigned long flags;
 136         int i, t;
 137
 138         local_irq_save(flags);
 139
 140         i = 0;
 141         do {
 142                 gameport_trigger(gameport);
 143                 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
 144                 while ((gameport_read(gameport) & 1) && t) t--;
 145                 udelay(seq[i]);
 146         } while (seq[++i]);
 147
 148         gameport_trigger(gameport);
 149
 150         local_irq_restore(flags);
 151 }
 152
 153 /*
 154  * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
 155  * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
 156  * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
 157  * is number of bits per triplet.
 158  */
 159
 160 #define GB(p,n,s)       gf2k_get_bits(data, p, n, s)
 161
 162 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
 163 {
 164         __u64 data = 0;
 165         int i;
 166
 167         for (i = 0; i < num / 3 + 2; i++)
 168                 data |= buf[pos / 3 + i] << (i * 3);
 169         data >>= pos % 3;
 170         data &= (1 << num) - 1;
 171         data <<= shift;
 172
 173         return data;
 174 }
 175
 176 static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
 177 {
 178         struct input_dev *dev = &gf2k->dev;
 179         int i, t;
 180
 181         for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
 182                 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
 183
 184         for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
 185                 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
 186
 187         t = GB(40,4,0);
 188
 189         for (i = 0; i < gf2k_hats[gf2k->id]; i++)
 190                 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
 191
 192         t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
 193
 194         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 195                 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
 196
 197         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 198                 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
 199
 200         input_sync(dev);
 201 }
 202
 203 /*
 204  * gf2k_poll() reads and analyzes Genius joystick data.
 205  */
 206
 207 static void gf2k_poll(struct gameport *gameport)
 208 {
 209         struct gf2k *gf2k = gameport_get_drvdata(gameport);
 210         unsigned char data[GF2K_LENGTH];
 211
 212         gf2k->reads++;
 213
 214         if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
 215                 gf2k->bads++;
 216         else
 217                 gf2k_read(gf2k, data);
 218 }
 219
 220 static int gf2k_open(struct input_dev *dev)
 221 {
 222         struct gf2k *gf2k = dev->private;
 223
 224         gameport_start_polling(gf2k->gameport);
 225         return 0;
 226 }
 227
 228 static void gf2k_close(struct input_dev *dev)
 229 {
 230         struct gf2k *gf2k = dev->private;
 231
 232         gameport_stop_polling(gf2k->gameport);
 233 }
 234
 235 /*
 236  * gf2k_connect() probes for Genius id joysticks.
 237  */
 238
 239 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
 240 {
 241         struct gf2k *gf2k;
 242         unsigned char data[GF2K_LENGTH];
 243         int i, err;
 244
 245         if (!(gf2k = kcalloc(1, sizeof(struct gf2k), GFP_KERNEL)))
 246                 return -ENOMEM;
 247
 248         gf2k->gameport = gameport;
 249
 250         gameport_set_drvdata(gameport, gf2k);
 251
 252         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 253         if (err)
 254                 goto fail1;
 255
 256         gf2k_trigger_seq(gameport, gf2k_seq_reset);
 257
 258         msleep(GF2K_TIMEOUT);
 259
 260         gf2k_trigger_seq(gameport, gf2k_seq_digital);
 261
 262         msleep(GF2K_TIMEOUT);
 263
 264         if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
 265                 err = -ENODEV;
 266                 goto fail2;
 267         }
 268
 269         if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
 270                 err = -ENODEV;
 271                 goto fail2;
 272         }
 273
 274 #ifdef RESET_WORKS
 275         if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) ||
 276             (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
 277                 err = -ENODEV;
 278                 goto fail2;
 279         }
 280 #else
 281         gf2k->id = 6;
 282 #endif
 283
 284         if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
 285                 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
 286                         gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
 287                 err = -ENODEV;
 288                 goto fail2;
 289         }
 290
 291         gameport_set_poll_handler(gameport, gf2k_poll);
 292         gameport_set_poll_interval(gameport, 20);
 293
 294         sprintf(gf2k->phys, "%s/input0", gameport->phys);
 295
 296         gf2k->length = gf2k_lens[gf2k->id];
 297
 298         init_input_dev(&gf2k->dev);
 299
 300         gf2k->dev.private = gf2k;
 301         gf2k->dev.open = gf2k_open;
 302         gf2k->dev.close = gf2k_close;
 303         gf2k->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 304
 305         gf2k->dev.name = gf2k_names[gf2k->id];
 306         gf2k->dev.phys = gf2k->phys;
 307         gf2k->dev.id.bustype = BUS_GAMEPORT;
 308         gf2k->dev.id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
 309         gf2k->dev.id.product = gf2k->id;
 310         gf2k->dev.id.version = 0x0100;
 311
 312         for (i = 0; i < gf2k_axes[gf2k->id]; i++)
 313                 set_bit(gf2k_abs[i], gf2k->dev.absbit);
 314
 315         for (i = 0; i < gf2k_hats[gf2k->id]; i++) {
 316                 set_bit(ABS_HAT0X + i, gf2k->dev.absbit);
 317                 gf2k->dev.absmin[ABS_HAT0X + i] = -1;
 318                 gf2k->dev.absmax[ABS_HAT0X + i] = 1;
 319         }
 320
 321         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 322                 set_bit(gf2k_btn_joy[i], gf2k->dev.keybit);
 323
 324         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 325                 set_bit(gf2k_btn_pad[i], gf2k->dev.keybit);
 326
 327         gf2k_read_packet(gameport, gf2k->length, data);
 328         gf2k_read(gf2k, data);
 329
 330         for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
 331                 gf2k->dev.absmax[gf2k_abs[i]] = (i < 2) ? gf2k->dev.abs[gf2k_abs[i]] * 2 - 32 :
 332                           gf2k->dev.abs[gf2k_abs[0]] + gf2k->dev.abs[gf2k_abs[1]] - 32;
 333                 gf2k->dev.absmin[gf2k_abs[i]] = 32;
 334                 gf2k->dev.absfuzz[gf2k_abs[i]] = 8;
 335                 gf2k->dev.absflat[gf2k_abs[i]] = (i < 2) ? 24 : 0;
 336         }
 337
 338         input_register_device(&gf2k->dev);
 339         printk(KERN_INFO "input: %s on %s\n", gf2k_names[gf2k->id], gameport->phys);
 340
 341         return 0;
 342
 343 fail2:  gameport_close(gameport);
 344 fail1:  gameport_set_drvdata(gameport, NULL);
 345         kfree(gf2k);
 346         return err;
 347 }
 348
 349 static void gf2k_disconnect(struct gameport *gameport)
 350 {
 351         struct gf2k *gf2k = gameport_get_drvdata(gameport);
 352
 353         input_unregister_device(&gf2k->dev);
 354         gameport_close(gameport);
 355         gameport_set_drvdata(gameport, NULL);
 356         kfree(gf2k);
 357 }
 358
 359 static struct gameport_driver gf2k_drv = {
 360         .driver         = {
 361                 .name   = "gf2k",
 362         },
 363         .description    = DRIVER_DESC,
 364         .connect        = gf2k_connect,
 365         .disconnect     = gf2k_disconnect,
 366 };
 367
 368 static int __init gf2k_init(void)
 369 {
 370         gameport_register_driver(&gf2k_drv);
 371         return 0;
 372 }
 373
 374 static void __exit gf2k_exit(void)
 375 {
 376         gameport_unregister_driver(&gf2k_drv);
 377 }
 378
 379 module_init(gf2k_init);
 380 module_exit(gf2k_exit);