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/input.h>
  34 #include <linux/gameport.h>
  35 #include <linux/jiffies.h>
  36
  37 #define DRIVER_DESC     "Genius Flight 2000 joystick driver"
  38
  39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  40 MODULE_DESCRIPTION(DRIVER_DESC);
  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
  48 /*
  49  * Genius joystick ids ...
  50  */
  51
  52 #define GF2K_ID_G09             1
  53 #define GF2K_ID_F30D            2
  54 #define GF2K_ID_F30             3
  55 #define GF2K_ID_F31D            4
  56 #define GF2K_ID_F305            5
  57 #define GF2K_ID_F23P            6
  58 #define GF2K_ID_F31             7
  59 #define GF2K_ID_MAX             7
  60
  61 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
  62 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}};
  63
  64 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
  65                                 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
  66 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
  67 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
  68 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
  69 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
  70 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
  71
  72 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
  73 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
  74 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 };
  75
  76
  77 static short gf2k_seq_reset[] = { 240, 340, 0 };
  78 static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
  79
  80 struct gf2k {
  81         struct gameport *gameport;
  82         struct input_dev *dev;
  83         int reads;
  84         int bads;
  85         unsigned char id;
  86         unsigned char length;
  87         char phys[32];
  88 };
  89
  90 /*
  91  * gf2k_read_packet() reads a Genius Flight2000 packet.
  92  */
  93
  94 static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
  95 {
  96         unsigned char u, v;
  97         int i;
  98         unsigned int t, p;
  99         unsigned long flags;
 100
 101         t = gameport_time(gameport, GF2K_START);
 102         p = gameport_time(gameport, GF2K_STROBE);
 103
 104         i = 0;
 105
 106         local_irq_save(flags);
 107
 108         gameport_trigger(gameport);
 109         v = gameport_read(gameport);
 110
 111         while (t > 0 && i < length) {
 112                 t--; u = v;
 113                 v = gameport_read(gameport);
 114                 if (v & ~u & 0x10) {
 115                         data[i++] = v >> 5;
 116                         t = p;
 117                 }
 118         }
 119
 120         local_irq_restore(flags);
 121
 122         return i;
 123 }
 124
 125 /*
 126  * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
 127  * into digital mode.
 128  */
 129
 130 static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
 131 {
 132
 133         unsigned long flags;
 134         int i, t;
 135
 136         local_irq_save(flags);
 137
 138         i = 0;
 139         do {
 140                 gameport_trigger(gameport);
 141                 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
 142                 while ((gameport_read(gameport) & 1) && t) t--;
 143                 udelay(seq[i]);
 144         } while (seq[++i]);
 145
 146         gameport_trigger(gameport);
 147
 148         local_irq_restore(flags);
 149 }
 150
 151 /*
 152  * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
 153  * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
 154  * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
 155  * is number of bits per triplet.
 156  */
 157
 158 #define GB(p,n,s)       gf2k_get_bits(data, p, n, s)
 159
 160 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
 161 {
 162         __u64 data = 0;
 163         int i;
 164
 165         for (i = 0; i < num / 3 + 2; i++)
 166                 data |= buf[pos / 3 + i] << (i * 3);
 167         data >>= pos % 3;
 168         data &= (1 << num) - 1;
 169         data <<= shift;
 170
 171         return data;
 172 }
 173
 174 static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
 175 {
 176         struct input_dev *dev = gf2k->dev;
 177         int i, t;
 178
 179         for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
 180                 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
 181
 182         for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
 183                 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
 184
 185         t = GB(40,4,0);
 186
 187         for (i = 0; i < gf2k_hats[gf2k->id]; i++)
 188                 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
 189
 190         t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
 191
 192         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 193                 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
 194
 195         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 196                 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
 197
 198         input_sync(dev);
 199 }
 200
 201 /*
 202  * gf2k_poll() reads and analyzes Genius joystick data.
 203  */
 204
 205 static void gf2k_poll(struct gameport *gameport)
 206 {
 207         struct gf2k *gf2k = gameport_get_drvdata(gameport);
 208         unsigned char data[GF2K_LENGTH];
 209
 210         gf2k->reads++;
 211
 212         if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
 213                 gf2k->bads++;
 214         else
 215                 gf2k_read(gf2k, data);
 216 }
 217
 218 static int gf2k_open(struct input_dev *dev)
 219 {
 220         struct gf2k *gf2k = input_get_drvdata(dev);
 221
 222         gameport_start_polling(gf2k->gameport);
 223         return 0;
 224 }
 225
 226 static void gf2k_close(struct input_dev *dev)
 227 {
 228         struct gf2k *gf2k = input_get_drvdata(dev);
 229
 230         gameport_stop_polling(gf2k->gameport);
 231 }
 232
 233 /*
 234  * gf2k_connect() probes for Genius id joysticks.
 235  */
 236
 237 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
 238 {
 239         struct gf2k *gf2k;
 240         struct input_dev *input_dev;
 241         unsigned char data[GF2K_LENGTH];
 242         int i, err;
 243
 244         gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL);
 245         input_dev = input_allocate_device();
 246         if (!gf2k || !input_dev) {
 247                 err = -ENOMEM;
 248                 goto fail1;
 249         }
 250
 251         gf2k->gameport = gameport;
 252         gf2k->dev = input_dev;
 253
 254         gameport_set_drvdata(gameport, gf2k);
 255
 256         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 257         if (err)
 258                 goto fail1;
 259
 260         gf2k_trigger_seq(gameport, gf2k_seq_reset);
 261
 262         msleep(GF2K_TIMEOUT);
 263
 264         gf2k_trigger_seq(gameport, gf2k_seq_digital);
 265
 266         msleep(GF2K_TIMEOUT);
 267
 268         if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
 269                 err = -ENODEV;
 270                 goto fail2;
 271         }
 272
 273         if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
 274                 err = -ENODEV;
 275                 goto fail2;
 276         }
 277
 278 #ifdef RESET_WORKS
 279         if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) &&
 280             (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
 281                 err = -ENODEV;
 282                 goto fail2;
 283         }
 284 #else
 285         gf2k->id = 6;
 286 #endif
 287
 288         if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
 289                 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
 290                         gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
 291                 err = -ENODEV;
 292                 goto fail2;
 293         }
 294
 295         gameport_set_poll_handler(gameport, gf2k_poll);
 296         gameport_set_poll_interval(gameport, 20);
 297
 298         snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys);
 299
 300         gf2k->length = gf2k_lens[gf2k->id];
 301
 302         input_dev->name = gf2k_names[gf2k->id];
 303         input_dev->phys = gf2k->phys;
 304         input_dev->id.bustype = BUS_GAMEPORT;
 305         input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
 306         input_dev->id.product = gf2k->id;
 307         input_dev->id.version = 0x0100;
 308         input_dev->dev.parent = &gameport->dev;
 309
 310         input_set_drvdata(input_dev, gf2k);
 311
 312         input_dev->open = gf2k_open;
 313         input_dev->close = gf2k_close;
 314
 315         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 316
 317         for (i = 0; i < gf2k_axes[gf2k->id]; i++)
 318                 set_bit(gf2k_abs[i], input_dev->absbit);
 319
 320         for (i = 0; i < gf2k_hats[gf2k->id]; i++)
 321                 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 322
 323         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 324                 set_bit(gf2k_btn_joy[i], input_dev->keybit);
 325
 326         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 327                 set_bit(gf2k_btn_pad[i], input_dev->keybit);
 328
 329         gf2k_read_packet(gameport, gf2k->length, data);
 330         gf2k_read(gf2k, data);
 331
 332         for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
 333                 int max = i < 2 ?
 334                         input_abs_get_val(input_dev, gf2k_abs[i]) * 2 :
 335                         input_abs_get_val(input_dev, gf2k_abs[0]) +
 336                                 input_abs_get_val(input_dev, gf2k_abs[1]);
 337                 int flat = i < 2 ? 24 : 0;
 338
 339                 input_set_abs_params(input_dev, gf2k_abs[i],
 340                                      32, max - 32, 8, flat);
 341         }
 342
 343         err = input_register_device(gf2k->dev);
 344         if (err)
 345                 goto fail2;
 346
 347         return 0;
 348
 349  fail2: gameport_close(gameport);
 350  fail1: gameport_set_drvdata(gameport, NULL);
 351         input_free_device(input_dev);
 352         kfree(gf2k);
 353         return err;
 354 }
 355
 356 static void gf2k_disconnect(struct gameport *gameport)
 357 {
 358         struct gf2k *gf2k = gameport_get_drvdata(gameport);
 359
 360         input_unregister_device(gf2k->dev);
 361         gameport_close(gameport);
 362         gameport_set_drvdata(gameport, NULL);
 363         kfree(gf2k);
 364 }
 365
 366 static struct gameport_driver gf2k_drv = {
 367         .driver         = {
 368                 .name   = "gf2k",
 369         },
 370         .description    = DRIVER_DESC,
 371         .connect        = gf2k_connect,
 372         .disconnect     = gf2k_disconnect,
 373 };
 374
 375 module_gameport_driver(gf2k_drv);