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 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  40 MODULE_DESCRIPTION("Genius Flight 2000 joystick driver");
  41 MODULE_LICENSE("GPL");
  42
  43 #define GF2K_START              400     /* The time we wait for the first bit [400 us] */
  44 #define GF2K_STROBE             40      /* The time we wait for the first bit [40 us] */
  45 #define GF2K_TIMEOUT            4       /* Wait for everything to settle [4 ms] */
  46 #define GF2K_LENGTH             80      /* Max number of triplets in a packet */
  47 #define GF2K_REFRESH            HZ/50   /* Time between joystick polls [20 ms] */
  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 timer_list timer;
  84         struct input_dev dev;
  85         int reads;
  86         int bads;
  87         int used;
  88         unsigned char id;
  89         unsigned char length;
  90         char phys[32];
  91 };
  92
  93 /*
  94  * gf2k_read_packet() reads a Genius Flight2000 packet.
  95  */
  96
  97 static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
  98 {
  99         unsigned char u, v;
 100         int i;
 101         unsigned int t, p;
 102         unsigned long flags;
 103
 104         t = gameport_time(gameport, GF2K_START);
 105         p = gameport_time(gameport, GF2K_STROBE);
 106
 107         i = 0;
 108
 109         local_irq_save(flags);
 110
 111         gameport_trigger(gameport);
 112         v = gameport_read(gameport);
 113
 114         while (t > 0 && i < length) {
 115                 t--; u = v;
 116                 v = gameport_read(gameport);
 117                 if (v & ~u & 0x10) {
 118                         data[i++] = v >> 5;
 119                         t = p;
 120                 }
 121         }
 122
 123         local_irq_restore(flags);
 124
 125         return i;
 126 }
 127
 128 /*
 129  * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
 130  * into digital mode.
 131  */
 132
 133 static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
 134 {
 135
 136         unsigned long flags;
 137         int i, t;
 138
 139         local_irq_save(flags);
 140
 141         i = 0;
 142         do {
 143                 gameport_trigger(gameport);
 144                 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
 145                 while ((gameport_read(gameport) & 1) && t) t--;
 146                 udelay(seq[i]);
 147         } while (seq[++i]);
 148
 149         gameport_trigger(gameport);
 150
 151         local_irq_restore(flags);
 152 }
 153
 154 /*
 155  * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
 156  * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
 157  * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
 158  * is number of bits per triplet.
 159  */
 160
 161 #define GB(p,n,s)       gf2k_get_bits(data, p, n, s)
 162
 163 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
 164 {
 165         __u64 data = 0;
 166         int i;
 167
 168         for (i = 0; i < num / 3 + 2; i++)
 169                 data |= buf[pos / 3 + i] << (i * 3);
 170         data >>= pos % 3;
 171         data &= (1 << num) - 1;
 172         data <<= shift;
 173
 174         return data;
 175 }
 176
 177 static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
 178 {
 179         struct input_dev *dev = &gf2k->dev;
 180         int i, t;
 181
 182         for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
 183                 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
 184
 185         for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
 186                 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
 187
 188         t = GB(40,4,0);
 189
 190         for (i = 0; i < gf2k_hats[gf2k->id]; i++)
 191                 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
 192
 193         t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
 194
 195         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 196                 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
 197
 198         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 199                 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
 200
 201         input_sync(dev);
 202 }
 203
 204 /*
 205  * gf2k_timer() reads and analyzes Genius joystick data.
 206  */
 207
 208 static void gf2k_timer(unsigned long private)
 209 {
 210         struct gf2k *gf2k = (void *) private;
 211         unsigned char data[GF2K_LENGTH];
 212
 213         gf2k->reads++;
 214
 215         if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id]) {
 216                 gf2k->bads++;
 217         } else gf2k_read(gf2k, data);
 218
 219         mod_timer(&gf2k->timer, jiffies + GF2K_REFRESH);
 220 }
 221
 222 static int gf2k_open(struct input_dev *dev)
 223 {
 224         struct gf2k *gf2k = dev->private;
 225         if (!gf2k->used++)
 226                 mod_timer(&gf2k->timer, jiffies + GF2K_REFRESH);
 227         return 0;
 228 }
 229
 230 static void gf2k_close(struct input_dev *dev)
 231 {
 232         struct gf2k *gf2k = dev->private;
 233         if (!--gf2k->used)
 234                 del_timer(&gf2k->timer);
 235 }
 236
 237 /*
 238  * gf2k_connect() probes for Genius id joysticks.
 239  */
 240
 241 static void gf2k_connect(struct gameport *gameport, struct gameport_dev *dev)
 242 {
 243         struct gf2k *gf2k;
 244         unsigned char data[GF2K_LENGTH];
 245         int i;
 246
 247         if (!(gf2k = kmalloc(sizeof(struct gf2k), GFP_KERNEL)))
 248                 return;
 249         memset(gf2k, 0, sizeof(struct gf2k));
 250
 251         gameport->private = gf2k;
 252
 253         gf2k->gameport = gameport;
 254         init_timer(&gf2k->timer);
 255         gf2k->timer.data = (long) gf2k;
 256         gf2k->timer.function = gf2k_timer;
 257
 258         if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW))
 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                 goto fail2;
 271
 272         if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5)))
 273                 goto fail2;
 274
 275 #ifdef RESET_WORKS
 276         if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) ||
 277             (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5))))
 278                 goto fail2;
 279 #else
 280         gf2k->id = 6;
 281 #endif
 282
 283         if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
 284                 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
 285                         gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
 286                 goto fail2;
 287         }
 288
 289         sprintf(gf2k->phys, "%s/input0", gameport->phys);
 290
 291         gf2k->length = gf2k_lens[gf2k->id];
 292
 293         init_input_dev(&gf2k->dev);
 294
 295         gf2k->dev.private = gf2k;
 296         gf2k->dev.open = gf2k_open;
 297         gf2k->dev.close = gf2k_close;
 298         gf2k->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 299
 300         gf2k->dev.name = gf2k_names[gf2k->id];
 301         gf2k->dev.phys = gf2k->phys;
 302         gf2k->dev.id.bustype = BUS_GAMEPORT;
 303         gf2k->dev.id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
 304         gf2k->dev.id.product = gf2k->id;
 305         gf2k->dev.id.version = 0x0100;
 306
 307         for (i = 0; i < gf2k_axes[gf2k->id]; i++)
 308                 set_bit(gf2k_abs[i], gf2k->dev.absbit);
 309
 310         for (i = 0; i < gf2k_hats[gf2k->id]; i++) {
 311                 set_bit(ABS_HAT0X + i, gf2k->dev.absbit);
 312                 gf2k->dev.absmin[ABS_HAT0X + i] = -1;
 313                 gf2k->dev.absmax[ABS_HAT0X + i] = 1;
 314         }
 315
 316         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 317                 set_bit(gf2k_btn_joy[i], gf2k->dev.keybit);
 318
 319         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 320                 set_bit(gf2k_btn_pad[i], gf2k->dev.keybit);
 321
 322         gf2k_read_packet(gameport, gf2k->length, data);
 323         gf2k_read(gf2k, data);
 324
 325         for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
 326                 gf2k->dev.absmax[gf2k_abs[i]] = (i < 2) ? gf2k->dev.abs[gf2k_abs[i]] * 2 - 32 :
 327                           gf2k->dev.abs[gf2k_abs[0]] + gf2k->dev.abs[gf2k_abs[1]] - 32;
 328                 gf2k->dev.absmin[gf2k_abs[i]] = 32;
 329                 gf2k->dev.absfuzz[gf2k_abs[i]] = 8;
 330                 gf2k->dev.absflat[gf2k_abs[i]] = (i < 2) ? 24 : 0;
 331         }
 332
 333         input_register_device(&gf2k->dev);
 334         printk(KERN_INFO "input: %s on %s\n", gf2k_names[gf2k->id], gameport->phys);
 335
 336         return;
 337 fail2:  gameport_close(gameport);
 338 fail1:  kfree(gf2k);
 339 }
 340
 341 static void gf2k_disconnect(struct gameport *gameport)
 342 {
 343         struct gf2k *gf2k = gameport->private;
 344         input_unregister_device(&gf2k->dev);
 345         gameport_close(gameport);
 346         kfree(gf2k);
 347 }
 348
 349 static struct gameport_dev gf2k_dev = {
 350         .connect =      gf2k_connect,
 351         .disconnect =   gf2k_disconnect,
 352 };
 353
 354 int __init gf2k_init(void)
 355 {
 356         gameport_register_device(&gf2k_dev);
 357         return 0;
 358 }
 359
 360 void __exit gf2k_exit(void)
 361 {
 362         gameport_unregister_device(&gf2k_dev);
 363 }
 364
 365 module_init(gf2k_init);
 366 module_exit(gf2k_exit);