2 * $Id: gf2k.c,v 1.19 2002/01/22 20:27:43 vojtech Exp $
4 * Copyright (c) 1998-2001 Vojtech Pavlik
8 * Genius Flight 2000 joystick 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/slab.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/input.h>
37 #include <linux/gameport.h>
38 #include <linux/jiffies.h>
40 #define DRIVER_DESC "Genius Flight 2000 joystick driver"
42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43 MODULE_DESCRIPTION(DRIVER_DESC);
44 MODULE_LICENSE("GPL");
46 #define GF2K_START 400 /* The time we wait for the first bit [400 us] */
47 #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */
48 #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */
49 #define GF2K_LENGTH 80 /* Max number of triplets in a packet */
52 * Genius joystick ids ...
56 #define GF2K_ID_F30D 2
58 #define GF2K_ID_F31D 4
59 #define GF2K_ID_F305 5
60 #define GF2K_ID_F23P 6
64 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
65 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}};
67 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
68 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
69 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
70 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
71 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
72 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
73 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
75 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
76 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
77 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 };
80 static short gf2k_seq_reset[] = { 240, 340, 0 };
81 static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
84 struct gameport *gameport;
85 struct input_dev *dev;
94 * gf2k_read_packet() reads a Genius Flight2000 packet.
97 static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
104 t = gameport_time(gameport, GF2K_START);
105 p = gameport_time(gameport, GF2K_STROBE);
109 local_irq_save(flags);
111 gameport_trigger(gameport);
112 v = gameport_read(gameport);
114 while (t > 0 && i < length) {
116 v = gameport_read(gameport);
123 local_irq_restore(flags);
129 * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
133 static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
139 local_irq_save(flags);
143 gameport_trigger(gameport);
144 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
145 while ((gameport_read(gameport) & 1) && t) t--;
149 gameport_trigger(gameport);
151 local_irq_restore(flags);
155 * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
156 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
157 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
158 * is number of bits per triplet.
161 #define GB(p,n,s) gf2k_get_bits(data, p, n, s)
163 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
168 for (i = 0; i < num / 3 + 2; i++)
169 data |= buf[pos / 3 + i] << (i * 3);
171 data &= (1 << num) - 1;
177 static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
179 struct input_dev *dev = gf2k->dev;
182 for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
183 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
185 for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
186 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
190 for (i = 0; i < gf2k_hats[gf2k->id]; i++)
191 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
193 t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
195 for (i = 0; i < gf2k_joys[gf2k->id]; i++)
196 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
198 for (i = 0; i < gf2k_pads[gf2k->id]; i++)
199 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
205 * gf2k_poll() reads and analyzes Genius joystick data.
208 static void gf2k_poll(struct gameport *gameport)
210 struct gf2k *gf2k = gameport_get_drvdata(gameport);
211 unsigned char data[GF2K_LENGTH];
215 if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
218 gf2k_read(gf2k, data);
221 static int gf2k_open(struct input_dev *dev)
223 struct gf2k *gf2k = dev->private;
225 gameport_start_polling(gf2k->gameport);
229 static void gf2k_close(struct input_dev *dev)
231 struct gf2k *gf2k = dev->private;
233 gameport_stop_polling(gf2k->gameport);
237 * gf2k_connect() probes for Genius id joysticks.
240 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
243 struct input_dev *input_dev;
244 unsigned char data[GF2K_LENGTH];
247 gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL);
248 input_dev = input_allocate_device();
249 if (!gf2k || !input_dev) {
254 gf2k->gameport = gameport;
255 gf2k->dev = input_dev;
257 gameport_set_drvdata(gameport, gf2k);
259 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
263 gf2k_trigger_seq(gameport, gf2k_seq_reset);
265 msleep(GF2K_TIMEOUT);
267 gf2k_trigger_seq(gameport, gf2k_seq_digital);
269 msleep(GF2K_TIMEOUT);
271 if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
276 if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
282 if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) ||
283 (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
291 if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
292 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
293 gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
298 gameport_set_poll_handler(gameport, gf2k_poll);
299 gameport_set_poll_interval(gameport, 20);
301 snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys);
303 gf2k->length = gf2k_lens[gf2k->id];
305 input_dev->name = gf2k_names[gf2k->id];
306 input_dev->phys = gf2k->phys;
307 input_dev->id.bustype = BUS_GAMEPORT;
308 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
309 input_dev->id.product = gf2k->id;
310 input_dev->id.version = 0x0100;
311 input_dev->cdev.dev = &gameport->dev;
312 input_dev->private = gf2k;
314 input_dev->open = gf2k_open;
315 input_dev->close = gf2k_close;
316 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
318 for (i = 0; i < gf2k_axes[gf2k->id]; i++)
319 set_bit(gf2k_abs[i], input_dev->absbit);
321 for (i = 0; i < gf2k_hats[gf2k->id]; i++) {
322 set_bit(ABS_HAT0X + i, input_dev->absbit);
323 input_dev->absmin[ABS_HAT0X + i] = -1;
324 input_dev->absmax[ABS_HAT0X + i] = 1;
327 for (i = 0; i < gf2k_joys[gf2k->id]; i++)
328 set_bit(gf2k_btn_joy[i], input_dev->keybit);
330 for (i = 0; i < gf2k_pads[gf2k->id]; i++)
331 set_bit(gf2k_btn_pad[i], input_dev->keybit);
333 gf2k_read_packet(gameport, gf2k->length, data);
334 gf2k_read(gf2k, data);
336 for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
337 input_dev->absmax[gf2k_abs[i]] = (i < 2) ? input_dev->abs[gf2k_abs[i]] * 2 - 32 :
338 input_dev->abs[gf2k_abs[0]] + input_dev->abs[gf2k_abs[1]] - 32;
339 input_dev->absmin[gf2k_abs[i]] = 32;
340 input_dev->absfuzz[gf2k_abs[i]] = 8;
341 input_dev->absflat[gf2k_abs[i]] = (i < 2) ? 24 : 0;
344 err = input_register_device(gf2k->dev);
350 fail2: gameport_close(gameport);
351 fail1: gameport_set_drvdata(gameport, NULL);
352 input_free_device(input_dev);
357 static void gf2k_disconnect(struct gameport *gameport)
359 struct gf2k *gf2k = gameport_get_drvdata(gameport);
361 input_unregister_device(gf2k->dev);
362 gameport_close(gameport);
363 gameport_set_drvdata(gameport, NULL);
367 static struct gameport_driver gf2k_drv = {
371 .description = DRIVER_DESC,
372 .connect = gf2k_connect,
373 .disconnect = gf2k_disconnect,
376 static int __init gf2k_init(void)
378 gameport_register_driver(&gf2k_drv);
382 static void __exit gf2k_exit(void)
384 gameport_unregister_driver(&gf2k_drv);
387 module_init(gf2k_init);
388 module_exit(gf2k_exit);