drivers/input/joystick/analog.c

   1 /*
   2  * $Id: analog.c,v 1.68 2002/01/22 20:18:32 vojtech Exp $
   3  *
   4  *  Copyright (c) 1996-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * Analog joystick and gamepad 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/config.h>
  32 #include <linux/delay.h>
  33 #include <linux/kernel.h>
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/slab.h>
  37 #include <linux/bitops.h>
  38 #include <linux/init.h>
  39 #include <linux/input.h>
  40 #include <linux/gameport.h>
  41 #include <asm/timex.h>
  42
  43 #define DRIVER_DESC     "Analog joystick and gamepad driver"
  44
  45 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  46 MODULE_DESCRIPTION(DRIVER_DESC);
  47 MODULE_LICENSE("GPL");
  48
  49 /*
  50  * Option parsing.
  51  */
  52
  53 #define ANALOG_PORTS            16
  54
  55 static char *js[ANALOG_PORTS];
  56 static int js_nargs;
  57 static int analog_options[ANALOG_PORTS];
  58 module_param_array_named(map, js, charp, &js_nargs, 0);
  59 MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities");
  60
  61 __obsolete_setup("js=");
  62
  63 /*
  64  * Times, feature definitions.
  65  */
  66
  67 #define ANALOG_RUDDER           0x00004
  68 #define ANALOG_THROTTLE         0x00008
  69 #define ANALOG_AXES_STD         0x0000f
  70 #define ANALOG_BTNS_STD         0x000f0
  71
  72 #define ANALOG_BTNS_CHF         0x00100
  73 #define ANALOG_HAT1_CHF         0x00200
  74 #define ANALOG_HAT2_CHF         0x00400
  75 #define ANALOG_HAT_FCS          0x00800
  76 #define ANALOG_HATS_ALL         0x00e00
  77 #define ANALOG_BTN_TL           0x01000
  78 #define ANALOG_BTN_TR           0x02000
  79 #define ANALOG_BTN_TL2          0x04000
  80 #define ANALOG_BTN_TR2          0x08000
  81 #define ANALOG_BTNS_TLR         0x03000
  82 #define ANALOG_BTNS_TLR2        0x0c000
  83 #define ANALOG_BTNS_GAMEPAD     0x0f000
  84
  85 #define ANALOG_HBTN_CHF         0x10000
  86 #define ANALOG_ANY_CHF          0x10700
  87 #define ANALOG_SAITEK           0x20000
  88 #define ANALOG_EXTENSIONS       0x7ff00
  89 #define ANALOG_GAMEPAD          0x80000
  90
  91 #define ANALOG_MAX_TIME         3       /* 3 ms */
  92 #define ANALOG_LOOP_TIME        2000    /* 2 * loop */
  93 #define ANALOG_SAITEK_DELAY     200     /* 200 us */
  94 #define ANALOG_SAITEK_TIME      2000    /* 2000 us */
  95 #define ANALOG_AXIS_TIME        2       /* 2 * refresh */
  96 #define ANALOG_INIT_RETRIES     8       /* 8 times */
  97 #define ANALOG_FUZZ_BITS        2       /* 2 bit more */
  98 #define ANALOG_FUZZ_MAGIC       36      /* 36 u*ms/loop */
  99
 100 #define ANALOG_MAX_NAME_LENGTH  128
 101 #define ANALOG_MAX_PHYS_LENGTH  32
 102
 103 static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE };
 104 static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
 105 static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR };
 106 static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS };
 107 static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE };
 108 static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2,
 109                                   BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 };
 110
 111 static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
 112
 113 struct analog {
 114         struct input_dev dev;
 115         int mask;
 116         short *buttons;
 117         char name[ANALOG_MAX_NAME_LENGTH];
 118         char phys[ANALOG_MAX_PHYS_LENGTH];
 119 };
 120
 121 struct analog_port {
 122         struct gameport *gameport;
 123         struct analog analog[2];
 124         unsigned char mask;
 125         char saitek;
 126         char cooked;
 127         int bads;
 128         int reads;
 129         int speed;
 130         int loop;
 131         int fuzz;
 132         int axes[4];
 133         int buttons;
 134         int initial[4];
 135         int axtime;
 136 };
 137
 138 /*
 139  * Time macros.
 140  */
 141
 142 #ifdef __i386__
 143
 144 #include <asm/i8253.h>
 145
 146 #define GET_TIME(x)     do { if (cpu_has_tsc) rdtscl(x); else x = get_time_pit(); } while (0)
 147 #define DELTA(x,y)      (cpu_has_tsc ? ((y) - (x)) : ((x) - (y) + ((x) < (y) ? CLOCK_TICK_RATE / HZ : 0)))
 148 #define TIME_NAME       (cpu_has_tsc?"TSC":"PIT")
 149 static unsigned int get_time_pit(void)
 150 {
 151         unsigned long flags;
 152         unsigned int count;
 153
 154         spin_lock_irqsave(&i8253_lock, flags);
 155         outb_p(0x00, 0x43);
 156         count = inb_p(0x40);
 157         count |= inb_p(0x40) << 8;
 158         spin_unlock_irqrestore(&i8253_lock, flags);
 159
 160         return count;
 161 }
 162 #elif defined(__x86_64__)
 163 #define GET_TIME(x)     rdtscl(x)
 164 #define DELTA(x,y)      ((y)-(x))
 165 #define TIME_NAME       "TSC"
 166 #elif defined(__alpha__)
 167 #define GET_TIME(x)     do { x = get_cycles(); } while (0)
 168 #define DELTA(x,y)      ((y)-(x))
 169 #define TIME_NAME       "PCC"
 170 #else
 171 #define FAKE_TIME
 172 static unsigned long analog_faketime = 0;
 173 #define GET_TIME(x)     do { x = analog_faketime++; } while(0)
 174 #define DELTA(x,y)      ((y)-(x))
 175 #define TIME_NAME       "Unreliable"
 176 #warning Precise timer not defined for this architecture.
 177 #endif
 178
 179 /*
 180  * analog_decode() decodes analog joystick data and reports input events.
 181  */
 182
 183 static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
 184 {
 185         struct input_dev *dev = &analog->dev;
 186         int i, j;
 187
 188         if (analog->mask & ANALOG_HAT_FCS)
 189                 for (i = 0; i < 4; i++)
 190                         if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) {
 191                                 buttons |= 1 << (i + 14);
 192                                 break;
 193                         }
 194
 195         for (i = j = 0; i < 6; i++)
 196                 if (analog->mask & (0x10 << i))
 197                         input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1);
 198
 199         if (analog->mask & ANALOG_HBTN_CHF)
 200                 for (i = 0; i < 4; i++)
 201                         input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1);
 202
 203         if (analog->mask & ANALOG_BTN_TL)
 204                 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1));
 205         if (analog->mask & ANALOG_BTN_TR)
 206                 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1));
 207         if (analog->mask & ANALOG_BTN_TL2)
 208                 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1)));
 209         if (analog->mask & ANALOG_BTN_TR2)
 210                 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1)));
 211
 212         for (i = j = 0; i < 4; i++)
 213                 if (analog->mask & (1 << i))
 214                         input_report_abs(dev, analog_axes[j++], axes[i]);
 215
 216         for (i = j = 0; i < 3; i++)
 217                 if (analog->mask & analog_exts[i]) {
 218                         input_report_abs(dev, analog_hats[j++],
 219                                 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1));
 220                         input_report_abs(dev, analog_hats[j++],
 221                                 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1));
 222                 }
 223
 224         input_sync(dev);
 225 }
 226
 227 /*
 228  * analog_cooked_read() reads analog joystick data.
 229  */
 230
 231 static int analog_cooked_read(struct analog_port *port)
 232 {
 233         struct gameport *gameport = port->gameport;
 234         unsigned int time[4], start, loop, now, loopout, timeout;
 235         unsigned char data[4], this, last;
 236         unsigned long flags;
 237         int i, j;
 238
 239         loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
 240         timeout = ANALOG_MAX_TIME * port->speed;
 241
 242         local_irq_save(flags);
 243         gameport_trigger(gameport);
 244         GET_TIME(now);
 245         local_irq_restore(flags);
 246
 247         start = now;
 248         this = port->mask;
 249         i = 0;
 250
 251         do {
 252                 loop = now;
 253                 last = this;
 254
 255                 local_irq_disable();
 256                 this = gameport_read(gameport) & port->mask;
 257                 GET_TIME(now);
 258                 local_irq_restore(flags);
 259
 260                 if ((last ^ this) && (DELTA(loop, now) < loopout)) {
 261                         data[i] = last ^ this;
 262                         time[i] = now;
 263                         i++;
 264                 }
 265
 266         } while (this && (i < 4) && (DELTA(start, now) < timeout));
 267
 268         this <<= 4;
 269
 270         for (--i; i >= 0; i--) {
 271                 this |= data[i];
 272                 for (j = 0; j < 4; j++)
 273                         if (data[i] & (1 << j))
 274                                 port->axes[j] = (DELTA(start, time[i]) << ANALOG_FUZZ_BITS) / port->loop;
 275         }
 276
 277         return -(this != port->mask);
 278 }
 279
 280 static int analog_button_read(struct analog_port *port, char saitek, char chf)
 281 {
 282         unsigned char u;
 283         int t = 1, i = 0;
 284         int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
 285
 286         u = gameport_read(port->gameport);
 287
 288         if (!chf) {
 289                 port->buttons = (~u >> 4) & 0xf;
 290                 return 0;
 291         }
 292
 293         port->buttons = 0;
 294
 295         while ((~u & 0xf0) && (i < 16) && t) {
 296                 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf];
 297                 if (!saitek) return 0;
 298                 udelay(ANALOG_SAITEK_DELAY);
 299                 t = strobe;
 300                 gameport_trigger(port->gameport);
 301                 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
 302                 i++;
 303         }
 304
 305         return -(!t || (i == 16));
 306 }
 307
 308 /*
 309  * analog_poll() repeatedly polls the Analog joysticks.
 310  */
 311
 312 static void analog_poll(struct gameport *gameport)
 313 {
 314         struct analog_port *port = gameport_get_drvdata(gameport);
 315         int i;
 316
 317         char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
 318         char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
 319
 320         if (port->cooked) {
 321                 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
 322                 if (chf)
 323                         port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
 324                 port->reads++;
 325         } else {
 326                 if (!port->axtime--) {
 327                         port->bads -= analog_cooked_read(port);
 328                         port->bads -= analog_button_read(port, saitek, chf);
 329                         port->reads++;
 330                         port->axtime = ANALOG_AXIS_TIME - 1;
 331                 } else {
 332                         if (!saitek)
 333                                 analog_button_read(port, saitek, chf);
 334                 }
 335         }
 336
 337         for (i = 0; i < 2; i++)
 338                 if (port->analog[i].mask)
 339                         analog_decode(port->analog + i, port->axes, port->initial, port->buttons);
 340 }
 341
 342 /*
 343  * analog_open() is a callback from the input open routine.
 344  */
 345
 346 static int analog_open(struct input_dev *dev)
 347 {
 348         struct analog_port *port = dev->private;
 349
 350         gameport_start_polling(port->gameport);
 351         return 0;
 352 }
 353
 354 /*
 355  * analog_close() is a callback from the input close routine.
 356  */
 357
 358 static void analog_close(struct input_dev *dev)
 359 {
 360         struct analog_port *port = dev->private;
 361
 362         gameport_stop_polling(port->gameport);
 363 }
 364
 365 /*
 366  * analog_calibrate_timer() calibrates the timer and computes loop
 367  * and timeout values for a joystick port.
 368  */
 369
 370 static void analog_calibrate_timer(struct analog_port *port)
 371 {
 372         struct gameport *gameport = port->gameport;
 373         unsigned int i, t, tx, t1, t2, t3;
 374         unsigned long flags;
 375
 376         local_irq_save(flags);
 377         GET_TIME(t1);
 378 #ifdef FAKE_TIME
 379         analog_faketime += 830;
 380 #endif
 381         mdelay(1);
 382         GET_TIME(t2);
 383         GET_TIME(t3);
 384         local_irq_restore(flags);
 385
 386         port->speed = DELTA(t1, t2) - DELTA(t2, t3);
 387
 388         tx = ~0;
 389
 390         for (i = 0; i < 50; i++) {
 391                 local_irq_save(flags);
 392                 GET_TIME(t1);
 393                 for (t = 0; t < 50; t++) { gameport_read(gameport); GET_TIME(t2); }
 394                 GET_TIME(t3);
 395                 local_irq_restore(flags);
 396                 udelay(i);
 397                 t = DELTA(t1, t2) - DELTA(t2, t3);
 398                 if (t < tx) tx = t;
 399         }
 400
 401         port->loop = tx / 50;
 402 }
 403
 404 /*
 405  * analog_name() constructs a name for an analog joystick.
 406  */
 407
 408 static void analog_name(struct analog *analog)
 409 {
 410         sprintf(analog->name, "Analog %d-axis %d-button",
 411                 hweight8(analog->mask & ANALOG_AXES_STD),
 412                 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 +
 413                 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4);
 414
 415         if (analog->mask & ANALOG_HATS_ALL)
 416                 sprintf(analog->name, "%s %d-hat",
 417                         analog->name, hweight16(analog->mask & ANALOG_HATS_ALL));
 418
 419         if (analog->mask & ANALOG_HAT_FCS)
 420                         strcat(analog->name, " FCS");
 421         if (analog->mask & ANALOG_ANY_CHF)
 422                         strcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF");
 423
 424         strcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick");
 425 }
 426
 427 /*
 428  * analog_init_device()
 429  */
 430
 431 static void analog_init_device(struct analog_port *port, struct analog *analog, int index)
 432 {
 433         int i, j, t, v, w, x, y, z;
 434
 435         analog_name(analog);
 436         sprintf(analog->phys, "%s/input%d", port->gameport->phys, index);
 437         analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
 438
 439         init_input_dev(&analog->dev);
 440
 441         analog->dev.name = analog->name;
 442         analog->dev.phys = analog->phys;
 443         analog->dev.id.bustype = BUS_GAMEPORT;
 444         analog->dev.id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
 445         analog->dev.id.product = analog->mask >> 4;
 446         analog->dev.id.version = 0x0100;
 447
 448         analog->dev.open = analog_open;
 449         analog->dev.close = analog_close;
 450         analog->dev.private = port;
 451         analog->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 452
 453         for (i = j = 0; i < 4; i++)
 454                 if (analog->mask & (1 << i)) {
 455
 456                         t = analog_axes[j];
 457                         x = port->axes[i];
 458                         y = (port->axes[0] + port->axes[1]) >> 1;
 459                         z = y - port->axes[i];
 460                         z = z > 0 ? z : -z;
 461                         v = (x >> 3);
 462                         w = (x >> 3);
 463
 464                         set_bit(t, analog->dev.absbit);
 465
 466                         if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
 467                                 x = y;
 468
 469                         if (analog->mask & ANALOG_SAITEK) {
 470                                 if (i == 2) x = port->axes[i];
 471                                 v = x - (x >> 2);
 472                                 w = (x >> 4);
 473                         }
 474
 475                         analog->dev.absmax[t] = (x << 1) - v;
 476                         analog->dev.absmin[t] = v;
 477                         analog->dev.absfuzz[t] = port->fuzz;
 478                         analog->dev.absflat[t] = w;
 479
 480                         j++;
 481                 }
 482
 483         for (i = j = 0; i < 3; i++)
 484                 if (analog->mask & analog_exts[i])
 485                         for (x = 0; x < 2; x++) {
 486                                 t = analog_hats[j++];
 487                                 set_bit(t, analog->dev.absbit);
 488                                 analog->dev.absmax[t] = 1;
 489                                 analog->dev.absmin[t] = -1;
 490                         }
 491
 492         for (i = j = 0; i < 4; i++)
 493                 if (analog->mask & (0x10 << i))
 494                         set_bit(analog->buttons[j++], analog->dev.keybit);
 495
 496         if (analog->mask & ANALOG_BTNS_CHF)
 497                 for (i = 0; i < 2; i++)
 498                         set_bit(analog->buttons[j++], analog->dev.keybit);
 499
 500         if (analog->mask & ANALOG_HBTN_CHF)
 501                 for (i = 0; i < 4; i++)
 502                         set_bit(analog->buttons[j++], analog->dev.keybit);
 503
 504         for (i = 0; i < 4; i++)
 505                 if (analog->mask & (ANALOG_BTN_TL << i))
 506                         set_bit(analog_pads[i], analog->dev.keybit);
 507
 508         analog_decode(analog, port->axes, port->initial, port->buttons);
 509
 510         input_register_device(&analog->dev);
 511
 512         printk(KERN_INFO "input: %s at %s", analog->name, port->gameport->phys);
 513
 514         if (port->cooked)
 515                 printk(" [ADC port]\n");
 516         else
 517                 printk(" [%s timer, %d %sHz clock, %d ns res]\n", TIME_NAME,
 518                 port->speed > 10000 ? (port->speed + 800) / 1000 : port->speed,
 519                 port->speed > 10000 ? "M" : "k",
 520                 port->speed > 10000 ? (port->loop * 1000) / (port->speed / 1000)
 521                                     : (port->loop * 1000000) / port->speed);
 522 }
 523
 524 /*
 525  * analog_init_devices() sets up device-specific values and registers the input devices.
 526  */
 527
 528 static int analog_init_masks(struct analog_port *port)
 529 {
 530         int i;
 531         struct analog *analog = port->analog;
 532         int max[4];
 533
 534         if (!port->mask)
 535                 return -1;
 536
 537         if ((port->mask & 3) != 3 && port->mask != 0xc) {
 538                 printk(KERN_WARNING "analog.c: Unknown joystick device found  "
 539                         "(data=%#x, %s), probably not analog joystick.\n",
 540                         port->mask, port->gameport->phys);
 541                 return -1;
 542         }
 543
 544
 545         i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */
 546
 547         analog[0].mask = i & 0xfffff;
 548
 549         analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
 550                         | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
 551                         | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
 552
 553         analog[0].mask &= ~(ANALOG_HAT2_CHF)
 554                         | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
 555
 556         analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
 557                         | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
 558                         | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
 559                         | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
 560
 561         analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
 562                         | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
 563                         &  ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
 564
 565         analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
 566
 567         analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
 568                         : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
 569
 570         if (port->cooked) {
 571
 572                 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
 573
 574                 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
 575                 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
 576                 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
 577                 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
 578                 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
 579
 580                 gameport_calibrate(port->gameport, port->axes, max);
 581         }
 582
 583         for (i = 0; i < 4; i++)
 584                 port->initial[i] = port->axes[i];
 585
 586         return -!(analog[0].mask || analog[1].mask);
 587 }
 588
 589 static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
 590 {
 591         int i, t, u, v;
 592
 593         port->gameport = gameport;
 594
 595         gameport_set_drvdata(gameport, port);
 596
 597         if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
 598
 599                 analog_calibrate_timer(port);
 600
 601                 gameport_trigger(gameport);
 602                 t = gameport_read(gameport);
 603                 msleep(ANALOG_MAX_TIME);
 604                 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
 605                 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
 606
 607                 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
 608                         if (!analog_cooked_read(port))
 609                                 break;
 610                         msleep(ANALOG_MAX_TIME);
 611                 }
 612
 613                 u = v = 0;
 614
 615                 msleep(ANALOG_MAX_TIME);
 616                 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
 617                 gameport_trigger(gameport);
 618                 while ((gameport_read(port->gameport) & port->mask) && (u < t))
 619                         u++;
 620                 udelay(ANALOG_SAITEK_DELAY);
 621                 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
 622                 gameport_trigger(gameport);
 623                 while ((gameport_read(port->gameport) & port->mask) && (v < t))
 624                         v++;
 625
 626                 if (v < (u >> 1)) { /* FIXME - more than one port */
 627                         analog_options[0] |= /* FIXME - more than one port */
 628                                 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
 629                         return 0;
 630                 }
 631
 632                 gameport_close(gameport);
 633         }
 634
 635         if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
 636
 637                 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
 638                         if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
 639                                 break;
 640                 for (i = 0; i < 4; i++)
 641                         if (port->axes[i] != -1)
 642                                 port->mask |= 1 << i;
 643
 644                 port->fuzz = gameport->fuzz;
 645                 port->cooked = 1;
 646                 return 0;
 647         }
 648
 649         return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 650 }
 651
 652 static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
 653 {
 654         struct analog_port *port;
 655         int i;
 656         int err;
 657
 658         if (!(port = kcalloc(1, sizeof(struct analog_port), GFP_KERNEL)))
 659                 return - ENOMEM;
 660
 661         err = analog_init_port(gameport, drv, port);
 662         if (err) {
 663                 kfree(port);
 664                 return err;
 665         }
 666
 667         err = analog_init_masks(port);
 668         if (err) {
 669                 gameport_close(gameport);
 670                 gameport_set_drvdata(gameport, NULL);
 671                 kfree(port);
 672                 return err;
 673         }
 674
 675         gameport_set_poll_handler(gameport, analog_poll);
 676         gameport_set_poll_interval(gameport, 10);
 677
 678         for (i = 0; i < 2; i++)
 679                 if (port->analog[i].mask)
 680                         analog_init_device(port, port->analog + i, i);
 681
 682         return 0;
 683 }
 684
 685 static void analog_disconnect(struct gameport *gameport)
 686 {
 687         int i;
 688         struct analog_port *port = gameport_get_drvdata(gameport);
 689
 690         for (i = 0; i < 2; i++)
 691                 if (port->analog[i].mask)
 692                         input_unregister_device(&port->analog[i].dev);
 693         gameport_close(gameport);
 694         gameport_set_drvdata(gameport, NULL);
 695         printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n",
 696                 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0,
 697                 port->gameport->phys);
 698         kfree(port);
 699 }
 700
 701 struct analog_types {
 702         char *name;
 703         int value;
 704 };
 705
 706 static struct analog_types analog_types[] = {
 707         { "none",       0x00000000 },
 708         { "auto",       0x000000ff },
 709         { "2btn",       0x0000003f },
 710         { "y-joy",      0x0cc00033 },
 711         { "y-pad",      0x8cc80033 },
 712         { "fcs",        0x000008f7 },
 713         { "chf",        0x000002ff },
 714         { "fullchf",    0x000007ff },
 715         { "gamepad",    0x000830f3 },
 716         { "gamepad8",   0x0008f0f3 },
 717         { NULL, 0 }
 718 };
 719
 720 static void analog_parse_options(void)
 721 {
 722         int i, j;
 723         char *end;
 724
 725         for (i = 0; i < js_nargs; i++) {
 726
 727                 for (j = 0; analog_types[j].name; j++)
 728                         if (!strcmp(analog_types[j].name, js[i])) {
 729                                 analog_options[i] = analog_types[j].value;
 730                                 break;
 731                         }
 732                 if (analog_types[j].name) continue;
 733
 734                 analog_options[i] = simple_strtoul(js[i], &end, 0);
 735                 if (end != js[i]) continue;
 736
 737                 analog_options[i] = 0xff;
 738                 if (!strlen(js[i])) continue;
 739
 740                 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
 741         }
 742
 743         for (; i < ANALOG_PORTS; i++)
 744                 analog_options[i] = 0xff;
 745 }
 746
 747 /*
 748  * The gameport device structure.
 749  */
 750
 751 static struct gameport_driver analog_drv = {
 752         .driver         = {
 753                 .name   = "analog",
 754         },
 755         .description    = DRIVER_DESC,
 756         .connect        = analog_connect,
 757         .disconnect     = analog_disconnect,
 758 };
 759
 760 static int __init analog_init(void)
 761 {
 762         analog_parse_options();
 763         gameport_register_driver(&analog_drv);
 764
 765         return 0;
 766 }
 767
 768 static void __exit analog_exit(void)
 769 {
 770         gameport_unregister_driver(&analog_drv);
 771 }
 772
 773 module_init(analog_init);
 774 module_exit(analog_exit);