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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Copyright (c) 1998-2001 Vojtech Pavlik |
4 | */ | |
5 | ||
6 | /* | |
7 | * Genius Flight 2000 joystick driver for Linux | |
8 | */ | |
9 | ||
10 | /* | |
1da177e4 LT |
11 | */ |
12 | ||
13 | #include <linux/delay.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/module.h> | |
1da177e4 LT |
17 | #include <linux/input.h> |
18 | #include <linux/gameport.h> | |
4e57b681 | 19 | #include <linux/jiffies.h> |
1da177e4 LT |
20 | |
21 | #define DRIVER_DESC "Genius Flight 2000 joystick driver" | |
22 | ||
23 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
24 | MODULE_DESCRIPTION(DRIVER_DESC); | |
25 | MODULE_LICENSE("GPL"); | |
26 | ||
27 | #define GF2K_START 400 /* The time we wait for the first bit [400 us] */ | |
28 | #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */ | |
29 | #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */ | |
30 | #define GF2K_LENGTH 80 /* Max number of triplets in a packet */ | |
31 | ||
32 | /* | |
33 | * Genius joystick ids ... | |
34 | */ | |
35 | ||
36 | #define GF2K_ID_G09 1 | |
37 | #define GF2K_ID_F30D 2 | |
38 | #define GF2K_ID_F30 3 | |
39 | #define GF2K_ID_F31D 4 | |
40 | #define GF2K_ID_F305 5 | |
41 | #define GF2K_ID_F23P 6 | |
42 | #define GF2K_ID_F31 7 | |
43 | #define GF2K_ID_MAX 7 | |
44 | ||
45 | static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 }; | |
46 | 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}}; | |
47 | ||
48 | static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D", | |
49 | "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"}; | |
50 | static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 }; | |
51 | static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 }; | |
52 | static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 }; | |
53 | static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 }; | |
54 | static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 }; | |
55 | ||
56 | static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE }; | |
57 | static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }; | |
58 | 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 }; | |
59 | ||
60 | ||
61 | static short gf2k_seq_reset[] = { 240, 340, 0 }; | |
62 | static short gf2k_seq_digital[] = { 590, 320, 860, 0 }; | |
63 | ||
64 | struct gf2k { | |
65 | struct gameport *gameport; | |
17dd3f0f | 66 | struct input_dev *dev; |
1da177e4 LT |
67 | int reads; |
68 | int bads; | |
69 | unsigned char id; | |
70 | unsigned char length; | |
71 | char phys[32]; | |
72 | }; | |
73 | ||
74 | /* | |
75 | * gf2k_read_packet() reads a Genius Flight2000 packet. | |
76 | */ | |
77 | ||
78 | static int gf2k_read_packet(struct gameport *gameport, int length, char *data) | |
79 | { | |
80 | unsigned char u, v; | |
81 | int i; | |
82 | unsigned int t, p; | |
83 | unsigned long flags; | |
84 | ||
85 | t = gameport_time(gameport, GF2K_START); | |
86 | p = gameport_time(gameport, GF2K_STROBE); | |
87 | ||
88 | i = 0; | |
89 | ||
90 | local_irq_save(flags); | |
91 | ||
92 | gameport_trigger(gameport); | |
93 | v = gameport_read(gameport); | |
94 | ||
95 | while (t > 0 && i < length) { | |
96 | t--; u = v; | |
97 | v = gameport_read(gameport); | |
98 | if (v & ~u & 0x10) { | |
99 | data[i++] = v >> 5; | |
100 | t = p; | |
101 | } | |
102 | } | |
103 | ||
104 | local_irq_restore(flags); | |
105 | ||
106 | return i; | |
107 | } | |
108 | ||
109 | /* | |
110 | * gf2k_trigger_seq() initializes a Genius Flight2000 joystick | |
111 | * into digital mode. | |
112 | */ | |
113 | ||
114 | static void gf2k_trigger_seq(struct gameport *gameport, short *seq) | |
115 | { | |
116 | ||
117 | unsigned long flags; | |
118 | int i, t; | |
119 | ||
120 | local_irq_save(flags); | |
121 | ||
122 | i = 0; | |
123 | do { | |
124 | gameport_trigger(gameport); | |
125 | t = gameport_time(gameport, GF2K_TIMEOUT * 1000); | |
126 | while ((gameport_read(gameport) & 1) && t) t--; | |
127 | udelay(seq[i]); | |
128 | } while (seq[++i]); | |
129 | ||
130 | gameport_trigger(gameport); | |
131 | ||
132 | local_irq_restore(flags); | |
133 | } | |
134 | ||
135 | /* | |
136 | * js_sw_get_bits() composes bits from the triplet buffer into a __u64. | |
137 | * Parameter 'pos' is bit number inside packet where to start at, 'num' is number | |
138 | * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits | |
139 | * is number of bits per triplet. | |
140 | */ | |
141 | ||
142 | #define GB(p,n,s) gf2k_get_bits(data, p, n, s) | |
143 | ||
144 | static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift) | |
145 | { | |
146 | __u64 data = 0; | |
147 | int i; | |
148 | ||
149 | for (i = 0; i < num / 3 + 2; i++) | |
150 | data |= buf[pos / 3 + i] << (i * 3); | |
151 | data >>= pos % 3; | |
152 | data &= (1 << num) - 1; | |
153 | data <<= shift; | |
154 | ||
155 | return data; | |
156 | } | |
157 | ||
158 | static void gf2k_read(struct gf2k *gf2k, unsigned char *data) | |
159 | { | |
17dd3f0f | 160 | struct input_dev *dev = gf2k->dev; |
1da177e4 LT |
161 | int i, t; |
162 | ||
163 | for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++) | |
164 | input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9)); | |
165 | ||
166 | for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++) | |
167 | input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9)); | |
168 | ||
169 | t = GB(40,4,0); | |
170 | ||
171 | for (i = 0; i < gf2k_hats[gf2k->id]; i++) | |
172 | input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]); | |
173 | ||
174 | t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10); | |
175 | ||
176 | for (i = 0; i < gf2k_joys[gf2k->id]; i++) | |
177 | input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1); | |
178 | ||
179 | for (i = 0; i < gf2k_pads[gf2k->id]; i++) | |
180 | input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1); | |
181 | ||
182 | input_sync(dev); | |
183 | } | |
184 | ||
185 | /* | |
186 | * gf2k_poll() reads and analyzes Genius joystick data. | |
187 | */ | |
188 | ||
189 | static void gf2k_poll(struct gameport *gameport) | |
190 | { | |
191 | struct gf2k *gf2k = gameport_get_drvdata(gameport); | |
192 | unsigned char data[GF2K_LENGTH]; | |
193 | ||
194 | gf2k->reads++; | |
195 | ||
196 | if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id]) | |
197 | gf2k->bads++; | |
198 | else | |
199 | gf2k_read(gf2k, data); | |
200 | } | |
201 | ||
202 | static int gf2k_open(struct input_dev *dev) | |
203 | { | |
8715c1cf | 204 | struct gf2k *gf2k = input_get_drvdata(dev); |
1da177e4 LT |
205 | |
206 | gameport_start_polling(gf2k->gameport); | |
207 | return 0; | |
208 | } | |
209 | ||
210 | static void gf2k_close(struct input_dev *dev) | |
211 | { | |
8715c1cf | 212 | struct gf2k *gf2k = input_get_drvdata(dev); |
1da177e4 LT |
213 | |
214 | gameport_stop_polling(gf2k->gameport); | |
215 | } | |
216 | ||
217 | /* | |
218 | * gf2k_connect() probes for Genius id joysticks. | |
219 | */ | |
220 | ||
221 | static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv) | |
222 | { | |
223 | struct gf2k *gf2k; | |
17dd3f0f | 224 | struct input_dev *input_dev; |
1da177e4 LT |
225 | unsigned char data[GF2K_LENGTH]; |
226 | int i, err; | |
227 | ||
17dd3f0f DT |
228 | gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL); |
229 | input_dev = input_allocate_device(); | |
230 | if (!gf2k || !input_dev) { | |
231 | err = -ENOMEM; | |
232 | goto fail1; | |
233 | } | |
1da177e4 LT |
234 | |
235 | gf2k->gameport = gameport; | |
17dd3f0f | 236 | gf2k->dev = input_dev; |
1da177e4 LT |
237 | |
238 | gameport_set_drvdata(gameport, gf2k); | |
239 | ||
240 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
241 | if (err) | |
242 | goto fail1; | |
243 | ||
244 | gf2k_trigger_seq(gameport, gf2k_seq_reset); | |
245 | ||
246 | msleep(GF2K_TIMEOUT); | |
247 | ||
248 | gf2k_trigger_seq(gameport, gf2k_seq_digital); | |
249 | ||
250 | msleep(GF2K_TIMEOUT); | |
251 | ||
252 | if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) { | |
253 | err = -ENODEV; | |
254 | goto fail2; | |
255 | } | |
256 | ||
257 | if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) { | |
258 | err = -ENODEV; | |
259 | goto fail2; | |
260 | } | |
261 | ||
262 | #ifdef RESET_WORKS | |
abf2a117 | 263 | if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) && |
1da177e4 LT |
264 | (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) { |
265 | err = -ENODEV; | |
266 | goto fail2; | |
267 | } | |
268 | #else | |
269 | gf2k->id = 6; | |
270 | #endif | |
271 | ||
272 | if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) { | |
273 | printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n", | |
274 | gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]); | |
275 | err = -ENODEV; | |
276 | goto fail2; | |
277 | } | |
278 | ||
279 | gameport_set_poll_handler(gameport, gf2k_poll); | |
280 | gameport_set_poll_interval(gameport, 20); | |
281 | ||
10ca4c0a | 282 | snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys); |
1da177e4 LT |
283 | |
284 | gf2k->length = gf2k_lens[gf2k->id]; | |
285 | ||
17dd3f0f DT |
286 | input_dev->name = gf2k_names[gf2k->id]; |
287 | input_dev->phys = gf2k->phys; | |
288 | input_dev->id.bustype = BUS_GAMEPORT; | |
289 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS; | |
290 | input_dev->id.product = gf2k->id; | |
291 | input_dev->id.version = 0x0100; | |
935e658e | 292 | input_dev->dev.parent = &gameport->dev; |
8715c1cf DT |
293 | |
294 | input_set_drvdata(input_dev, gf2k); | |
1da177e4 | 295 | |
17dd3f0f DT |
296 | input_dev->open = gf2k_open; |
297 | input_dev->close = gf2k_close; | |
8715c1cf | 298 | |
7b19ada2 | 299 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
1da177e4 LT |
300 | |
301 | for (i = 0; i < gf2k_axes[gf2k->id]; i++) | |
17dd3f0f | 302 | set_bit(gf2k_abs[i], input_dev->absbit); |
1da177e4 | 303 | |
987a6c02 DM |
304 | for (i = 0; i < gf2k_hats[gf2k->id]; i++) |
305 | input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0); | |
1da177e4 LT |
306 | |
307 | for (i = 0; i < gf2k_joys[gf2k->id]; i++) | |
17dd3f0f | 308 | set_bit(gf2k_btn_joy[i], input_dev->keybit); |
1da177e4 LT |
309 | |
310 | for (i = 0; i < gf2k_pads[gf2k->id]; i++) | |
17dd3f0f | 311 | set_bit(gf2k_btn_pad[i], input_dev->keybit); |
1da177e4 LT |
312 | |
313 | gf2k_read_packet(gameport, gf2k->length, data); | |
314 | gf2k_read(gf2k, data); | |
315 | ||
316 | for (i = 0; i < gf2k_axes[gf2k->id]; i++) { | |
987a6c02 DM |
317 | int max = i < 2 ? |
318 | input_abs_get_val(input_dev, gf2k_abs[i]) * 2 : | |
319 | input_abs_get_val(input_dev, gf2k_abs[0]) + | |
320 | input_abs_get_val(input_dev, gf2k_abs[1]); | |
321 | int flat = i < 2 ? 24 : 0; | |
322 | ||
323 | input_set_abs_params(input_dev, gf2k_abs[i], | |
324 | 32, max - 32, 8, flat); | |
1da177e4 LT |
325 | } |
326 | ||
127278ce DT |
327 | err = input_register_device(gf2k->dev); |
328 | if (err) | |
329 | goto fail2; | |
1da177e4 LT |
330 | |
331 | return 0; | |
332 | ||
17dd3f0f DT |
333 | fail2: gameport_close(gameport); |
334 | fail1: gameport_set_drvdata(gameport, NULL); | |
335 | input_free_device(input_dev); | |
1da177e4 LT |
336 | kfree(gf2k); |
337 | return err; | |
338 | } | |
339 | ||
340 | static void gf2k_disconnect(struct gameport *gameport) | |
341 | { | |
342 | struct gf2k *gf2k = gameport_get_drvdata(gameport); | |
343 | ||
17dd3f0f | 344 | input_unregister_device(gf2k->dev); |
1da177e4 LT |
345 | gameport_close(gameport); |
346 | gameport_set_drvdata(gameport, NULL); | |
347 | kfree(gf2k); | |
348 | } | |
349 | ||
350 | static struct gameport_driver gf2k_drv = { | |
351 | .driver = { | |
352 | .name = "gf2k", | |
353 | }, | |
354 | .description = DRIVER_DESC, | |
355 | .connect = gf2k_connect, | |
356 | .disconnect = gf2k_disconnect, | |
357 | }; | |
358 | ||
98a84131 | 359 | module_gameport_driver(gf2k_drv); |