Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 1998-2001 Vojtech Pavlik
4 */
5
6/*
7 * Genius Flight 2000 joystick driver for Linux
8 */
9
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>
17
18#define DRIVER_DESC "Genius Flight 2000 joystick driver"
19
20MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
21MODULE_DESCRIPTION(DRIVER_DESC);
22MODULE_LICENSE("GPL");
23
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 */
28
29/*
30 * Genius joystick ids ...
31 */
32
33#define GF2K_ID_G09 1
34#define GF2K_ID_F30D 2
35#define GF2K_ID_F30 3
36#define GF2K_ID_F31D 4
37#define GF2K_ID_F305 5
38#define GF2K_ID_F23P 6
39#define GF2K_ID_F31 7
40#define GF2K_ID_MAX 7
41
42static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
43static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
44
45static 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"};
47static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
48static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
49static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
50static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
51static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
52
53static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
54static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
55static 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 };
56
57
58static short gf2k_seq_reset[] = { 240, 340, 0 };
59static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
60
61struct gf2k {
62 struct gameport *gameport;
63 struct input_dev *dev;
64 int reads;
65 int bads;
66 unsigned char id;
67 unsigned char length;
68 char phys[32];
69};
70
71/*
72 * gf2k_read_packet() reads a Genius Flight2000 packet.
73 */
74
75static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
76{
77 unsigned char u, v;
78 int i;
79 unsigned int t, p;
80 unsigned long flags;
81
82 t = gameport_time(gameport, GF2K_START);
83 p = gameport_time(gameport, GF2K_STROBE);
84
85 i = 0;
86
87 local_irq_save(flags);
88
89 gameport_trigger(gameport);
90 v = gameport_read(gameport);
91
92 while (t > 0 && i < length) {
93 t--; u = v;
94 v = gameport_read(gameport);
95 if (v & ~u & 0x10) {
96 data[i++] = v >> 5;
97 t = p;
98 }
99 }
100
101 local_irq_restore(flags);
102
103 return i;
104}
105
106/*
107 * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
108 * into digital mode.
109 */
110
111static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
112{
113
114 unsigned long flags;
115 int i, t;
116
117 local_irq_save(flags);
118
119 i = 0;
120 do {
121 gameport_trigger(gameport);
122 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
123 while ((gameport_read(gameport) & 1) && t) t--;
124 udelay(seq[i]);
125 } while (seq[++i]);
126
127 gameport_trigger(gameport);
128
129 local_irq_restore(flags);
130}
131
132/*
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.
137 */
138
139#define GB(p,n,s) gf2k_get_bits(data, p, n, s)
140
141static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
142{
143 __u64 data = 0;
144 int i;
145
146 for (i = 0; i < num / 3 + 2; i++)
147 data |= buf[pos / 3 + i] << (i * 3);
148 data >>= pos % 3;
149 data &= (1 << num) - 1;
150 data <<= shift;
151
152 return data;
153}
154
155static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
156{
157 struct input_dev *dev = gf2k->dev;
158 int i, t;
159
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));
162
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));
165
166 t = GB(40,4,0);
167
168 if (t < ARRAY_SIZE(gf2k_hat_to_axis))
169 for (i = 0; i < gf2k_hats[gf2k->id]; i++)
170 input_report_abs(dev, ABS_HAT0X + i,
171 gf2k_hat_to_axis[t][i]);
172
173 t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
174
175 for (i = 0; i < gf2k_joys[gf2k->id]; i++)
176 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
177
178 for (i = 0; i < gf2k_pads[gf2k->id]; i++)
179 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
180
181 input_sync(dev);
182}
183
184/*
185 * gf2k_poll() reads and analyzes Genius joystick data.
186 */
187
188static void gf2k_poll(struct gameport *gameport)
189{
190 struct gf2k *gf2k = gameport_get_drvdata(gameport);
191 unsigned char data[GF2K_LENGTH];
192
193 gf2k->reads++;
194
195 if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
196 gf2k->bads++;
197 else
198 gf2k_read(gf2k, data);
199}
200
201static int gf2k_open(struct input_dev *dev)
202{
203 struct gf2k *gf2k = input_get_drvdata(dev);
204
205 gameport_start_polling(gf2k->gameport);
206 return 0;
207}
208
209static void gf2k_close(struct input_dev *dev)
210{
211 struct gf2k *gf2k = input_get_drvdata(dev);
212
213 gameport_stop_polling(gf2k->gameport);
214}
215
216/*
217 * gf2k_connect() probes for Genius id joysticks.
218 */
219
220static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
221{
222 struct gf2k *gf2k;
223 struct input_dev *input_dev;
224 unsigned char data[GF2K_LENGTH];
225 int i, err;
226
227 gf2k = kzalloc_obj(*gf2k);
228 input_dev = input_allocate_device();
229 if (!gf2k || !input_dev) {
230 err = -ENOMEM;
231 goto fail1;
232 }
233
234 gf2k->gameport = gameport;
235 gf2k->dev = input_dev;
236
237 gameport_set_drvdata(gameport, gf2k);
238
239 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
240 if (err)
241 goto fail1;
242
243 gf2k_trigger_seq(gameport, gf2k_seq_reset);
244
245 msleep(GF2K_TIMEOUT);
246
247 gf2k_trigger_seq(gameport, gf2k_seq_digital);
248
249 msleep(GF2K_TIMEOUT);
250
251 if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
252 err = -ENODEV;
253 goto fail2;
254 }
255
256 if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
257 err = -ENODEV;
258 goto fail2;
259 }
260
261#ifdef RESET_WORKS
262 if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) &&
263 (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
264 err = -ENODEV;
265 goto fail2;
266 }
267#else
268 gf2k->id = 6;
269#endif
270
271 if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
272 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
273 gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
274 err = -ENODEV;
275 goto fail2;
276 }
277
278 gameport_set_poll_handler(gameport, gf2k_poll);
279 gameport_set_poll_interval(gameport, 20);
280
281 snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys);
282
283 gf2k->length = gf2k_lens[gf2k->id];
284
285 input_dev->name = gf2k_names[gf2k->id];
286 input_dev->phys = gf2k->phys;
287 input_dev->id.bustype = BUS_GAMEPORT;
288 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
289 input_dev->id.product = gf2k->id;
290 input_dev->id.version = 0x0100;
291 input_dev->dev.parent = &gameport->dev;
292
293 input_set_drvdata(input_dev, gf2k);
294
295 input_dev->open = gf2k_open;
296 input_dev->close = gf2k_close;
297
298 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
299
300 for (i = 0; i < gf2k_axes[gf2k->id]; i++)
301 set_bit(gf2k_abs[i], input_dev->absbit);
302
303 for (i = 0; i < gf2k_hats[gf2k->id]; i++)
304 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
305
306 for (i = 0; i < gf2k_joys[gf2k->id]; i++)
307 set_bit(gf2k_btn_joy[i], input_dev->keybit);
308
309 for (i = 0; i < gf2k_pads[gf2k->id]; i++)
310 set_bit(gf2k_btn_pad[i], input_dev->keybit);
311
312 gf2k_read_packet(gameport, gf2k->length, data);
313 gf2k_read(gf2k, data);
314
315 for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
316 int max = i < 2 ?
317 input_abs_get_val(input_dev, gf2k_abs[i]) * 2 :
318 input_abs_get_val(input_dev, gf2k_abs[0]) +
319 input_abs_get_val(input_dev, gf2k_abs[1]);
320 int flat = i < 2 ? 24 : 0;
321
322 input_set_abs_params(input_dev, gf2k_abs[i],
323 32, max - 32, 8, flat);
324 }
325
326 err = input_register_device(gf2k->dev);
327 if (err)
328 goto fail2;
329
330 return 0;
331
332 fail2: gameport_close(gameport);
333 fail1: gameport_set_drvdata(gameport, NULL);
334 input_free_device(input_dev);
335 kfree(gf2k);
336 return err;
337}
338
339static void gf2k_disconnect(struct gameport *gameport)
340{
341 struct gf2k *gf2k = gameport_get_drvdata(gameport);
342
343 input_unregister_device(gf2k->dev);
344 gameport_close(gameport);
345 gameport_set_drvdata(gameport, NULL);
346 kfree(gf2k);
347}
348
349static struct gameport_driver gf2k_drv = {
350 .driver = {
351 .name = "gf2k",
352 },
353 .description = DRIVER_DESC,
354 .connect = gf2k_connect,
355 .disconnect = gf2k_disconnect,
356};
357
358module_gameport_driver(gf2k_drv);