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