1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 1998-2005 Vojtech Pavlik
7 * Logitech ADI joystick family driver for Linux
10 #include <linux/delay.h>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/string.h>
14 #include <linux/slab.h>
15 #include <linux/input.h>
16 #include <linux/gameport.h>
17 #include <linux/jiffies.h>
19 #define DRIVER_DESC "Logitech ADI joystick family driver"
22 MODULE_DESCRIPTION(DRIVER_DESC);
23 MODULE_LICENSE("GPL");
26 * Times, array sizes, flags, ids.
29 #define ADI_MAX_START 200 /* Trigger to packet timeout [200us] */
30 #define ADI_MAX_STROBE 40 /* Single bit timeout [40us] */
31 #define ADI_INIT_DELAY 10 /* Delay after init packet [10ms] */
32 #define ADI_DATA_DELAY 4 /* Delay after data packet [4ms] */
34 #define ADI_MAX_LENGTH 256
35 #define ADI_MIN_LENGTH 8
36 #define ADI_MIN_LEN_LENGTH 10
37 #define ADI_MIN_ID_LENGTH 66
38 #define ADI_MAX_NAME_LENGTH 64
39 #define ADI_MAX_CNAME_LENGTH 16
40 #define ADI_MAX_PHYS_LENGTH 64
42 #define ADI_FLAG_HAT 0x04
43 #define ADI_FLAG_10BIT 0x08
45 #define ADI_ID_TPD 0x01
46 #define ADI_ID_WGP 0x06
47 #define ADI_ID_WGPE 0x08
48 #define ADI_ID_MAX 0x0a
51 * Names, buttons, axes ...
54 static char *adi_names[] = { "WingMan Extreme Digital", "ThunderPad Digital", "SideCar", "CyberMan 2",
55 "WingMan Interceptor", "WingMan Formula", "WingMan GamePad",
56 "WingMan Extreme Digital 3D", "WingMan GamePad Extreme",
57 "WingMan GamePad USB", "Unknown Device %#x" };
59 static char adi_wmgpe_abs[] = { ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y };
60 static char adi_wmi_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
61 static char adi_wmed3d_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RZ, ABS_HAT0X, ABS_HAT0Y };
62 static char adi_cm2_abs[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
63 static char adi_wmf_abs[] = { ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
65 static short adi_wmgpe_key[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT };
66 static short adi_wmi_key[] = { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_EXTRA };
67 static short adi_wmed3d_key[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2 };
68 static short adi_cm2_key[] = { BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
70 static char* adi_abs[] = { adi_wmi_abs, adi_wmgpe_abs, adi_wmf_abs, adi_cm2_abs, adi_wmi_abs, adi_wmf_abs,
71 adi_wmgpe_abs, adi_wmed3d_abs, adi_wmgpe_abs, adi_wmgpe_abs, adi_wmi_abs };
73 static short* adi_key[] = { adi_wmi_key, adi_wmgpe_key, adi_cm2_key, adi_cm2_key, adi_wmi_key, adi_cm2_key,
74 adi_wmgpe_key, adi_wmed3d_key, adi_wmgpe_key, adi_wmgpe_key, adi_wmi_key };
77 * Hat to axis conversion arrays.
83 } adi_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
86 * Per-port information.
90 struct input_dev *dev;
102 char name[ADI_MAX_NAME_LENGTH];
103 char cname[ADI_MAX_CNAME_LENGTH];
104 char phys[ADI_MAX_PHYS_LENGTH];
105 unsigned char data[ADI_MAX_LENGTH];
109 struct gameport *gameport;
116 * adi_read_packet() reads a Logitech ADI packet.
119 static void adi_read_packet(struct adi_port *port)
121 struct adi *adi = port->adi;
122 struct gameport *gameport = port->gameport;
123 unsigned char u, v, w, x;
127 for (i = 0; i < 2; i++) {
129 t[i] = gameport_time(gameport, ADI_MAX_START);
133 local_irq_save(flags);
135 gameport_trigger(gameport);
136 v = gameport_read(gameport);
140 w = u ^ (v = x = gameport_read(gameport));
141 for (i = 0; i < 2; i++, w >>= 2, x >>= 2) {
143 if ((w & 0x30) && s[i]) {
144 if ((w & 0x30) < 0x30 && adi[i].ret < ADI_MAX_LENGTH && t[i] > 0) {
145 adi[i].data[++adi[i].ret] = w;
146 t[i] = gameport_time(gameport, ADI_MAX_STROBE);
148 } else if (!(x & 0x30)) s[i] = 1;
150 } while (t[0] > 0 || t[1] > 0);
152 local_irq_restore(flags);
158 * adi_move_bits() detects a possible 2-stream mode, and moves
159 * the bits accordingly.
162 static void adi_move_bits(struct adi_port *port, int length)
165 struct adi *adi = port->adi;
167 adi[0].idx = adi[1].idx = 0;
169 if (adi[0].ret <= 0 || adi[1].ret <= 0) return;
170 if (adi[0].data[0] & 0x20 || ~adi[1].data[0] & 0x20) return;
172 for (i = 1; i <= adi[1].ret; i++)
173 adi[0].data[((length - 1) >> 1) + i + 1] = adi[1].data[i];
175 adi[0].ret += adi[1].ret;
180 * adi_get_bits() gathers bits from the data packet.
183 static inline int adi_get_bits(struct adi *adi, int count)
187 if ((adi->idx += count) > adi->ret) return 0;
188 for (i = 0; i < count; i++)
189 bits |= ((adi->data[adi->idx - i] >> 5) & 1) << i;
194 * adi_decode() decodes Logitech joystick data into input events.
197 static int adi_decode(struct adi *adi)
199 struct input_dev *dev = adi->dev;
200 char *abs = adi->abs;
201 short *key = adi->key;
204 if (adi->ret < adi->length || adi->id != (adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4)))
207 for (i = 0; i < adi->axes10; i++)
208 input_report_abs(dev, *abs++, adi_get_bits(adi, 10));
210 for (i = 0; i < adi->axes8; i++)
211 input_report_abs(dev, *abs++, adi_get_bits(adi, 8));
213 for (i = 0; i < adi->buttons && i < 63; i++) {
215 t = adi_get_bits(adi, 4);
216 input_report_abs(dev, *abs++, ((t >> 2) & 1) - ( t & 1));
217 input_report_abs(dev, *abs++, ((t >> 1) & 1) - ((t >> 3) & 1));
219 input_report_key(dev, *key++, adi_get_bits(adi, 1));
222 for (i = 0; i < adi->hats; i++) {
223 if ((t = adi_get_bits(adi, 4)) > 8) t = 0;
224 input_report_abs(dev, *abs++, adi_hat_to_axis[t].x);
225 input_report_abs(dev, *abs++, adi_hat_to_axis[t].y);
228 for (i = 63; i < adi->buttons; i++)
229 input_report_key(dev, *key++, adi_get_bits(adi, 1));
237 * adi_read() reads the data packet and decodes it.
240 static int adi_read(struct adi_port *port)
245 adi_read_packet(port);
246 adi_move_bits(port, port->adi[0].length);
248 for (i = 0; i < 2; i++)
249 if (port->adi[i].length)
250 result |= adi_decode(port->adi + i);
256 * adi_poll() repeatedly polls the Logitech joysticks.
259 static void adi_poll(struct gameport *gameport)
261 struct adi_port *port = gameport_get_drvdata(gameport);
263 port->bad -= adi_read(port);
268 * adi_open() is a callback from the input open routine.
271 static int adi_open(struct input_dev *dev)
273 struct adi_port *port = input_get_drvdata(dev);
275 gameport_start_polling(port->gameport);
280 * adi_close() is a callback from the input close routine.
283 static void adi_close(struct input_dev *dev)
285 struct adi_port *port = input_get_drvdata(dev);
287 gameport_stop_polling(port->gameport);
291 * adi_init_digital() sends a trigger & delay sequence
292 * to reset and initialize a Logitech joystick into digital mode.
295 static void adi_init_digital(struct gameport *gameport)
297 static const int seq[] = { 4, -2, -3, 10, -6, -11, -7, -9, 11, 0 };
300 for (i = 0; seq[i]; i++) {
301 gameport_trigger(gameport);
306 udelay(-seq[i]*14); /* It looks like mdelay() is off by approx 1.4% */
311 static void adi_id_decode(struct adi *adi, struct adi_port *port)
315 if (adi->ret < ADI_MIN_ID_LENGTH) /* Minimum ID packet length */
318 if (adi->ret < (t = adi_get_bits(adi, 10))) {
319 printk(KERN_WARNING "adi: Short ID packet: reported: %d != read: %d\n", t, adi->ret);
323 adi->id = adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4);
325 if ((t = adi_get_bits(adi, 4)) & ADI_FLAG_HAT) adi->hats++;
327 adi->length = adi_get_bits(adi, 10);
329 if (adi->length >= ADI_MAX_LENGTH || adi->length < ADI_MIN_LENGTH) {
330 printk(KERN_WARNING "adi: Bad data packet length (%d).\n", adi->length);
335 adi->axes8 = adi_get_bits(adi, 4);
336 adi->buttons = adi_get_bits(adi, 6);
338 if (adi_get_bits(adi, 6) != 8 && adi->hats) {
339 printk(KERN_WARNING "adi: Other than 8-dir POVs not supported yet.\n");
344 adi->buttons += adi_get_bits(adi, 6);
345 adi->hats += adi_get_bits(adi, 4);
347 i = adi_get_bits(adi, 4);
349 if (t & ADI_FLAG_10BIT) {
350 adi->axes10 = adi->axes8 - i;
354 t = adi_get_bits(adi, 4);
356 for (i = 0; i < t; i++)
357 adi->cname[i] = adi_get_bits(adi, 8);
360 t = 8 + adi->buttons + adi->axes10 * 10 + adi->axes8 * 8 + adi->hats * 4;
361 if (adi->length != t && adi->length != t + (t & 1)) {
362 printk(KERN_WARNING "adi: Expected length %d != data length %d\n", t, adi->length);
382 static int adi_init_input(struct adi *adi, struct adi_port *port, int half)
384 struct input_dev *input_dev;
385 char buf[ADI_MAX_NAME_LENGTH];
388 adi->dev = input_dev = input_allocate_device();
392 t = adi->id < ADI_ID_MAX ? adi->id : ADI_ID_MAX;
394 snprintf(buf, ADI_MAX_PHYS_LENGTH, adi_names[t], adi->id);
395 snprintf(adi->name, ADI_MAX_NAME_LENGTH, "Logitech %s [%s]", buf, adi->cname);
396 snprintf(adi->phys, ADI_MAX_PHYS_LENGTH, "%s/input%d", port->gameport->phys, half);
398 adi->abs = adi_abs[t];
399 adi->key = adi_key[t];
401 input_dev->name = adi->name;
402 input_dev->phys = adi->phys;
403 input_dev->id.bustype = BUS_GAMEPORT;
404 input_dev->id.vendor = GAMEPORT_ID_VENDOR_LOGITECH;
405 input_dev->id.product = adi->id;
406 input_dev->id.version = 0x0100;
407 input_dev->dev.parent = &port->gameport->dev;
409 input_set_drvdata(input_dev, port);
411 input_dev->open = adi_open;
412 input_dev->close = adi_close;
414 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
416 for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++)
417 set_bit(adi->abs[i], input_dev->absbit);
419 for (i = 0; i < adi->buttons; i++)
420 set_bit(adi->key[i], input_dev->keybit);
425 static void adi_init_center(struct adi *adi)
432 for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++) {
435 x = input_abs_get_val(adi->dev, t);
437 if (t == ABS_THROTTLE || t == ABS_RUDDER || adi->id == ADI_ID_WGPE)
438 x = i < adi->axes10 ? 512 : 128;
441 input_set_abs_params(adi->dev, t, 64, x * 2 - 64, 2, 16);
442 else if (i < adi->axes10 + adi->axes8)
443 input_set_abs_params(adi->dev, t, 48, x * 2 - 48, 1, 16);
445 input_set_abs_params(adi->dev, t, -1, 1, 0, 0);
450 * adi_connect() probes for Logitech ADI joysticks.
453 static int adi_connect(struct gameport *gameport, struct gameport_driver *drv)
455 struct adi_port *port;
459 port = kzalloc(sizeof(struct adi_port), GFP_KERNEL);
463 port->gameport = gameport;
465 gameport_set_drvdata(gameport, port);
467 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
471 adi_init_digital(gameport);
472 adi_read_packet(port);
474 if (port->adi[0].ret >= ADI_MIN_LEN_LENGTH)
475 adi_move_bits(port, adi_get_bits(port->adi, 10));
477 for (i = 0; i < 2; i++) {
478 adi_id_decode(port->adi + i, port);
480 if (!port->adi[i].length)
483 err = adi_init_input(port->adi + i, port, i);
488 if (!port->adi[0].length && !port->adi[1].length) {
493 gameport_set_poll_handler(gameport, adi_poll);
494 gameport_set_poll_interval(gameport, 20);
496 msleep(ADI_INIT_DELAY);
497 if (adi_read(port)) {
498 msleep(ADI_DATA_DELAY);
502 for (i = 0; i < 2; i++)
503 if (port->adi[i].length > 0) {
504 adi_init_center(port->adi + i);
505 err = input_register_device(port->adi[i].dev);
512 fail3: while (--i >= 0) {
513 if (port->adi[i].length > 0) {
514 input_unregister_device(port->adi[i].dev);
515 port->adi[i].dev = NULL;
518 fail2: for (i = 0; i < 2; i++)
519 input_free_device(port->adi[i].dev);
520 gameport_close(gameport);
521 fail1: gameport_set_drvdata(gameport, NULL);
526 static void adi_disconnect(struct gameport *gameport)
529 struct adi_port *port = gameport_get_drvdata(gameport);
531 for (i = 0; i < 2; i++)
532 if (port->adi[i].length > 0)
533 input_unregister_device(port->adi[i].dev);
534 gameport_close(gameport);
535 gameport_set_drvdata(gameport, NULL);
539 static struct gameport_driver adi_drv = {
543 .description = DRIVER_DESC,
544 .connect = adi_connect,
545 .disconnect = adi_disconnect,
548 module_gameport_driver(adi_drv);