2 * $Id: analog.c,v 1.68 2002/01/22 20:18:32 vojtech Exp $
4 * Copyright (c) 1996-2001 Vojtech Pavlik
8 * Analog joystick and gamepad driver for Linux
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.
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.
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
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
31 #include <linux/delay.h>
32 #include <linux/kernel.h>
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <linux/slab.h>
36 #include <linux/bitops.h>
37 #include <linux/init.h>
38 #include <linux/input.h>
39 #include <linux/gameport.h>
40 #include <linux/jiffies.h>
41 #include <asm/timex.h>
43 #define DRIVER_DESC "Analog joystick and gamepad driver"
45 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
46 MODULE_DESCRIPTION(DRIVER_DESC);
47 MODULE_LICENSE("GPL");
53 #define ANALOG_PORTS 16
55 static char *js[ANALOG_PORTS];
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");
61 __obsolete_setup("js=");
64 * Times, feature definitions.
67 #define ANALOG_RUDDER 0x00004
68 #define ANALOG_THROTTLE 0x00008
69 #define ANALOG_AXES_STD 0x0000f
70 #define ANALOG_BTNS_STD 0x000f0
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
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
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 */
100 #define ANALOG_MAX_NAME_LENGTH 128
101 #define ANALOG_MAX_PHYS_LENGTH 32
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 };
111 static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 };
114 struct input_dev *dev;
117 char name[ANALOG_MAX_NAME_LENGTH];
118 char phys[ANALOG_MAX_PHYS_LENGTH];
122 struct gameport *gameport;
123 struct analog analog[2];
144 #include <asm/i8253.h>
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)
154 spin_lock_irqsave(&i8253_lock, flags);
157 count |= inb_p(0x40) << 8;
158 spin_unlock_irqrestore(&i8253_lock, flags);
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"
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.
180 * analog_decode() decodes analog joystick data and reports input events.
183 static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons)
185 struct input_dev *dev = analog->dev;
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);
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);
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);
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)));
212 for (i = j = 0; i < 4; i++)
213 if (analog->mask & (1 << i))
214 input_report_abs(dev, analog_axes[j++], axes[i]);
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));
228 * analog_cooked_read() reads analog joystick data.
231 static int analog_cooked_read(struct analog_port *port)
233 struct gameport *gameport = port->gameport;
234 unsigned int time[4], start, loop, now, loopout, timeout;
235 unsigned char data[4], this, last;
239 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000;
240 timeout = ANALOG_MAX_TIME * port->speed;
242 local_irq_save(flags);
243 gameport_trigger(gameport);
245 local_irq_restore(flags);
256 this = gameport_read(gameport) & port->mask;
258 local_irq_restore(flags);
260 if ((last ^ this) && (DELTA(loop, now) < loopout)) {
261 data[i] = last ^ this;
266 } while (this && (i < 4) && (DELTA(start, now) < timeout));
270 for (--i; i >= 0; 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;
277 return -(this != port->mask);
280 static int analog_button_read(struct analog_port *port, char saitek, char chf)
284 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME);
286 u = gameport_read(port->gameport);
289 port->buttons = (~u >> 4) & 0xf;
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);
300 gameport_trigger(port->gameport);
301 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--;
305 return -(!t || (i == 16));
309 * analog_poll() repeatedly polls the Analog joysticks.
312 static void analog_poll(struct gameport *gameport)
314 struct analog_port *port = gameport_get_drvdata(gameport);
317 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK);
318 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF);
321 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons);
323 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0;
326 if (!port->axtime--) {
327 port->bads -= analog_cooked_read(port);
328 port->bads -= analog_button_read(port, saitek, chf);
330 port->axtime = ANALOG_AXIS_TIME - 1;
333 analog_button_read(port, saitek, chf);
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);
343 * analog_open() is a callback from the input open routine.
346 static int analog_open(struct input_dev *dev)
348 struct analog_port *port = dev->private;
350 gameport_start_polling(port->gameport);
355 * analog_close() is a callback from the input close routine.
358 static void analog_close(struct input_dev *dev)
360 struct analog_port *port = dev->private;
362 gameport_stop_polling(port->gameport);
366 * analog_calibrate_timer() calibrates the timer and computes loop
367 * and timeout values for a joystick port.
370 static void analog_calibrate_timer(struct analog_port *port)
372 struct gameport *gameport = port->gameport;
373 unsigned int i, t, tx, t1, t2, t3;
376 local_irq_save(flags);
379 analog_faketime += 830;
384 local_irq_restore(flags);
386 port->speed = DELTA(t1, t2) - DELTA(t2, t3);
390 for (i = 0; i < 50; i++) {
391 local_irq_save(flags);
393 for (t = 0; t < 50; t++) { gameport_read(gameport); GET_TIME(t2); }
395 local_irq_restore(flags);
397 t = DELTA(t1, t2) - DELTA(t2, t3);
401 port->loop = tx / 50;
405 * analog_name() constructs a name for an analog joystick.
408 static void analog_name(struct analog *analog)
410 snprintf(analog->name, sizeof(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);
415 if (analog->mask & ANALOG_HATS_ALL)
416 snprintf(analog->name, sizeof(analog->name), "%s %d-hat",
417 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL));
419 if (analog->mask & ANALOG_HAT_FCS)
420 strlcat(analog->name, " FCS", sizeof(analog->name));
421 if (analog->mask & ANALOG_ANY_CHF)
422 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF",
423 sizeof(analog->name));
425 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick",
426 sizeof(analog->name));
430 * analog_init_device()
433 static int analog_init_device(struct analog_port *port, struct analog *analog, int index)
435 struct input_dev *input_dev;
436 int i, j, t, v, w, x, y, z;
439 snprintf(analog->phys, sizeof(analog->phys),
440 "%s/input%d", port->gameport->phys, index);
441 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn;
443 analog->dev = input_dev = input_allocate_device();
447 input_dev->name = analog->name;
448 input_dev->phys = analog->phys;
449 input_dev->id.bustype = BUS_GAMEPORT;
450 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG;
451 input_dev->id.product = analog->mask >> 4;
452 input_dev->id.version = 0x0100;
454 input_dev->open = analog_open;
455 input_dev->close = analog_close;
456 input_dev->private = port;
457 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
459 for (i = j = 0; i < 4; i++)
460 if (analog->mask & (1 << i)) {
464 y = (port->axes[0] + port->axes[1]) >> 1;
465 z = y - port->axes[i];
470 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3)))
473 if (analog->mask & ANALOG_SAITEK) {
474 if (i == 2) x = port->axes[i];
479 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w);
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 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
490 for (i = j = 0; i < 4; i++)
491 if (analog->mask & (0x10 << i))
492 set_bit(analog->buttons[j++], input_dev->keybit);
494 if (analog->mask & ANALOG_BTNS_CHF)
495 for (i = 0; i < 2; i++)
496 set_bit(analog->buttons[j++], input_dev->keybit);
498 if (analog->mask & ANALOG_HBTN_CHF)
499 for (i = 0; i < 4; i++)
500 set_bit(analog->buttons[j++], input_dev->keybit);
502 for (i = 0; i < 4; i++)
503 if (analog->mask & (ANALOG_BTN_TL << i))
504 set_bit(analog_pads[i], input_dev->keybit);
506 analog_decode(analog, port->axes, port->initial, port->buttons);
508 input_register_device(analog->dev);
514 * analog_init_devices() sets up device-specific values and registers the input devices.
517 static int analog_init_masks(struct analog_port *port)
520 struct analog *analog = port->analog;
526 if ((port->mask & 3) != 3 && port->mask != 0xc) {
527 printk(KERN_WARNING "analog.c: Unknown joystick device found "
528 "(data=%#x, %s), probably not analog joystick.\n",
529 port->mask, port->gameport->phys);
534 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */
536 analog[0].mask = i & 0xfffff;
538 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD)
539 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS)
540 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2);
542 analog[0].mask &= ~(ANALOG_HAT2_CHF)
543 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF);
545 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2)
546 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8)
547 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2)
548 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4);
550 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER)
551 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10)
552 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12));
554 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000);
556 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD
557 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD);
561 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1;
563 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1;
564 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1;
565 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1;
566 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1;
567 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1;
569 gameport_calibrate(port->gameport, port->axes, max);
572 for (i = 0; i < 4; i++)
573 port->initial[i] = port->axes[i];
575 return -!(analog[0].mask || analog[1].mask);
578 static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port)
582 port->gameport = gameport;
584 gameport_set_drvdata(gameport, port);
586 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
588 analog_calibrate_timer(port);
590 gameport_trigger(gameport);
591 t = gameport_read(gameport);
592 msleep(ANALOG_MAX_TIME);
593 port->mask = (gameport_read(gameport) ^ t) & t & 0xf;
594 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS;
596 for (i = 0; i < ANALOG_INIT_RETRIES; i++) {
597 if (!analog_cooked_read(port))
599 msleep(ANALOG_MAX_TIME);
604 msleep(ANALOG_MAX_TIME);
605 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000);
606 gameport_trigger(gameport);
607 while ((gameport_read(port->gameport) & port->mask) && (u < t))
609 udelay(ANALOG_SAITEK_DELAY);
610 t = gameport_time(gameport, ANALOG_SAITEK_TIME);
611 gameport_trigger(gameport);
612 while ((gameport_read(port->gameport) & port->mask) && (v < t))
615 if (v < (u >> 1)) { /* FIXME - more than one port */
616 analog_options[0] |= /* FIXME - more than one port */
617 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF;
621 gameport_close(gameport);
624 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
626 for (i = 0; i < ANALOG_INIT_RETRIES; i++)
627 if (!gameport_cooked_read(gameport, port->axes, &port->buttons))
629 for (i = 0; i < 4; i++)
630 if (port->axes[i] != -1)
631 port->mask |= 1 << i;
633 port->fuzz = gameport->fuzz;
638 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
641 static int analog_connect(struct gameport *gameport, struct gameport_driver *drv)
643 struct analog_port *port;
647 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL)))
650 err = analog_init_port(gameport, drv, port);
654 err = analog_init_masks(port);
658 gameport_set_poll_handler(gameport, analog_poll);
659 gameport_set_poll_interval(gameport, 10);
661 for (i = 0; i < 2; i++)
662 if (port->analog[i].mask) {
663 err = analog_init_device(port, port->analog + i, i);
670 fail3: while (--i >= 0)
671 input_unregister_device(port->analog[i].dev);
672 fail2: gameport_close(gameport);
673 fail1: gameport_set_drvdata(gameport, NULL);
678 static void analog_disconnect(struct gameport *gameport)
680 struct analog_port *port = gameport_get_drvdata(gameport);
683 for (i = 0; i < 2; i++)
684 if (port->analog[i].mask)
685 input_unregister_device(port->analog[i].dev);
686 gameport_close(gameport);
687 gameport_set_drvdata(gameport, NULL);
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);
694 struct analog_types {
699 static 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 },
713 static void analog_parse_options(void)
718 for (i = 0; i < js_nargs; i++) {
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;
725 if (analog_types[j].name) continue;
727 analog_options[i] = simple_strtoul(js[i], &end, 0);
728 if (end != js[i]) continue;
730 analog_options[i] = 0xff;
731 if (!strlen(js[i])) continue;
733 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]);
736 for (; i < ANALOG_PORTS; i++)
737 analog_options[i] = 0xff;
741 * The gameport device structure.
744 static struct gameport_driver analog_drv = {
748 .description = DRIVER_DESC,
749 .connect = analog_connect,
750 .disconnect = analog_disconnect,
753 static int __init analog_init(void)
755 analog_parse_options();
756 gameport_register_driver(&analog_drv);
761 static void __exit analog_exit(void)
763 gameport_unregister_driver(&analog_drv);
766 module_init(analog_init);
767 module_exit(analog_exit);