1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 1998-2001 Vojtech Pavlik
7 * Genius Flight 2000 joystick driver for Linux
10 #include <linux/delay.h>
11 #include <linux/kernel.h>
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/input.h>
15 #include <linux/gameport.h>
16 #include <linux/jiffies.h>
18 #define DRIVER_DESC "Genius Flight 2000 joystick driver"
20 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
21 MODULE_DESCRIPTION(DRIVER_DESC);
22 MODULE_LICENSE("GPL");
24 #define GF2K_START 400 /* The time we wait for the first bit [400 us] */
25 #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */
26 #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */
27 #define GF2K_LENGTH 80 /* Max number of triplets in a packet */
30 * Genius joystick ids ...
34 #define GF2K_ID_F30D 2
36 #define GF2K_ID_F31D 4
37 #define GF2K_ID_F305 5
38 #define GF2K_ID_F23P 6
42 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
43 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}};
45 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
46 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
47 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
48 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
49 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
50 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
51 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
53 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
54 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
55 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 };
58 static short gf2k_seq_reset[] = { 240, 340, 0 };
59 static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
62 struct gameport *gameport;
63 struct input_dev *dev;
72 * gf2k_read_packet() reads a Genius Flight2000 packet.
75 static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
82 t = gameport_time(gameport, GF2K_START);
83 p = gameport_time(gameport, GF2K_STROBE);
87 local_irq_save(flags);
89 gameport_trigger(gameport);
90 v = gameport_read(gameport);
92 while (t > 0 && i < length) {
94 v = gameport_read(gameport);
101 local_irq_restore(flags);
107 * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
111 static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
117 local_irq_save(flags);
121 gameport_trigger(gameport);
122 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
123 while ((gameport_read(gameport) & 1) && t) t--;
127 gameport_trigger(gameport);
129 local_irq_restore(flags);
133 * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
134 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
135 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
136 * is number of bits per triplet.
139 #define GB(p,n,s) gf2k_get_bits(data, p, n, s)
141 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
146 for (i = 0; i < num / 3 + 2; i++)
147 data |= buf[pos / 3 + i] << (i * 3);
149 data &= (1 << num) - 1;
155 static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
157 struct input_dev *dev = gf2k->dev;
160 for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
161 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
163 for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
164 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
168 for (i = 0; i < gf2k_hats[gf2k->id]; i++)
169 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
171 t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
173 for (i = 0; i < gf2k_joys[gf2k->id]; i++)
174 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
176 for (i = 0; i < gf2k_pads[gf2k->id]; i++)
177 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
183 * gf2k_poll() reads and analyzes Genius joystick data.
186 static void gf2k_poll(struct gameport *gameport)
188 struct gf2k *gf2k = gameport_get_drvdata(gameport);
189 unsigned char data[GF2K_LENGTH];
193 if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
196 gf2k_read(gf2k, data);
199 static int gf2k_open(struct input_dev *dev)
201 struct gf2k *gf2k = input_get_drvdata(dev);
203 gameport_start_polling(gf2k->gameport);
207 static void gf2k_close(struct input_dev *dev)
209 struct gf2k *gf2k = input_get_drvdata(dev);
211 gameport_stop_polling(gf2k->gameport);
215 * gf2k_connect() probes for Genius id joysticks.
218 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
221 struct input_dev *input_dev;
222 unsigned char data[GF2K_LENGTH];
225 gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL);
226 input_dev = input_allocate_device();
227 if (!gf2k || !input_dev) {
232 gf2k->gameport = gameport;
233 gf2k->dev = input_dev;
235 gameport_set_drvdata(gameport, gf2k);
237 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
241 gf2k_trigger_seq(gameport, gf2k_seq_reset);
243 msleep(GF2K_TIMEOUT);
245 gf2k_trigger_seq(gameport, gf2k_seq_digital);
247 msleep(GF2K_TIMEOUT);
249 if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
254 if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
260 if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) &&
261 (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
269 if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
270 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
271 gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
276 gameport_set_poll_handler(gameport, gf2k_poll);
277 gameport_set_poll_interval(gameport, 20);
279 snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys);
281 gf2k->length = gf2k_lens[gf2k->id];
283 input_dev->name = gf2k_names[gf2k->id];
284 input_dev->phys = gf2k->phys;
285 input_dev->id.bustype = BUS_GAMEPORT;
286 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
287 input_dev->id.product = gf2k->id;
288 input_dev->id.version = 0x0100;
289 input_dev->dev.parent = &gameport->dev;
291 input_set_drvdata(input_dev, gf2k);
293 input_dev->open = gf2k_open;
294 input_dev->close = gf2k_close;
296 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
298 for (i = 0; i < gf2k_axes[gf2k->id]; i++)
299 set_bit(gf2k_abs[i], input_dev->absbit);
301 for (i = 0; i < gf2k_hats[gf2k->id]; i++)
302 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
304 for (i = 0; i < gf2k_joys[gf2k->id]; i++)
305 set_bit(gf2k_btn_joy[i], input_dev->keybit);
307 for (i = 0; i < gf2k_pads[gf2k->id]; i++)
308 set_bit(gf2k_btn_pad[i], input_dev->keybit);
310 gf2k_read_packet(gameport, gf2k->length, data);
311 gf2k_read(gf2k, data);
313 for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
315 input_abs_get_val(input_dev, gf2k_abs[i]) * 2 :
316 input_abs_get_val(input_dev, gf2k_abs[0]) +
317 input_abs_get_val(input_dev, gf2k_abs[1]);
318 int flat = i < 2 ? 24 : 0;
320 input_set_abs_params(input_dev, gf2k_abs[i],
321 32, max - 32, 8, flat);
324 err = input_register_device(gf2k->dev);
330 fail2: gameport_close(gameport);
331 fail1: gameport_set_drvdata(gameport, NULL);
332 input_free_device(input_dev);
337 static void gf2k_disconnect(struct gameport *gameport)
339 struct gf2k *gf2k = gameport_get_drvdata(gameport);
341 input_unregister_device(gf2k->dev);
342 gameport_close(gameport);
343 gameport_set_drvdata(gameport, NULL);
347 static struct gameport_driver gf2k_drv = {
351 .description = DRIVER_DESC,
352 .connect = gf2k_connect,
353 .disconnect = gf2k_disconnect,
356 module_gameport_driver(gf2k_drv);