1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (c) 2001 Vojtech Pavlik |
4 | * |
5 | * Based on the work of: |
6 | * Toby Deshane |
7 | */ |
8 | |
9 | /* |
10 | * InterAct digital gamepad/joystick driver for Linux |
11 | */ |
12 | |
13 | #include <linux/kernel.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/module.h> |
16 | #include <linux/delay.h> |
17 | #include <linux/gameport.h> |
18 | #include <linux/input.h> |
19 | #include <linux/jiffies.h> |
20 | |
21 | #define DRIVER_DESC "InterAct digital joystick driver" |
22 | |
23 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>" ); |
24 | MODULE_DESCRIPTION(DRIVER_DESC); |
25 | MODULE_LICENSE("GPL" ); |
26 | |
27 | #define INTERACT_MAX_START 600 /* 400 us */ |
28 | #define INTERACT_MAX_STROBE 60 /* 40 us */ |
29 | #define INTERACT_MAX_LENGTH 32 /* 32 bits */ |
30 | |
31 | #define INTERACT_TYPE_HHFX 0 /* HammerHead/FX */ |
32 | #define INTERACT_TYPE_PP8D 1 /* ProPad 8 */ |
33 | |
34 | struct interact { |
35 | struct gameport *gameport; |
36 | struct input_dev *dev; |
37 | int bads; |
38 | int reads; |
39 | unsigned char type; |
40 | unsigned char length; |
41 | char phys[32]; |
42 | }; |
43 | |
44 | static short interact_abs_hhfx[] = |
45 | { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 }; |
46 | static short interact_abs_pp8d[] = |
47 | { ABS_X, ABS_Y, -1 }; |
48 | |
49 | static short interact_btn_hhfx[] = |
50 | { BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL, BTN_TL2, BTN_TR2, BTN_MODE, BTN_SELECT, -1 }; |
51 | static short interact_btn_pp8d[] = |
52 | { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 }; |
53 | |
54 | struct interact_type { |
55 | int id; |
56 | short *abs; |
57 | short *btn; |
58 | char *name; |
59 | unsigned char length; |
60 | unsigned char b8; |
61 | }; |
62 | |
63 | static struct interact_type interact_type[] = { |
64 | { 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX" , 32, 4 }, |
65 | { 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital" , 16, 0 }, |
66 | { 0 }}; |
67 | |
68 | /* |
69 | * interact_read_packet() reads and InterAct joystick data. |
70 | */ |
71 | |
72 | static int interact_read_packet(struct gameport *gameport, int length, u32 *data) |
73 | { |
74 | unsigned long flags; |
75 | unsigned char u, v; |
76 | unsigned int t, s; |
77 | int i; |
78 | |
79 | i = 0; |
80 | data[0] = data[1] = data[2] = 0; |
81 | t = gameport_time(gameport, INTERACT_MAX_START); |
82 | s = gameport_time(gameport, INTERACT_MAX_STROBE); |
83 | |
84 | local_irq_save(flags); |
85 | gameport_trigger(gameport); |
86 | v = gameport_read(gameport); |
87 | |
88 | while (t > 0 && i < length) { |
89 | t--; |
90 | u = v; v = gameport_read(gameport); |
91 | if (v & ~u & 0x40) { |
92 | data[0] = (data[0] << 1) | ((v >> 4) & 1); |
93 | data[1] = (data[1] << 1) | ((v >> 5) & 1); |
94 | data[2] = (data[2] << 1) | ((v >> 7) & 1); |
95 | i++; |
96 | t = s; |
97 | } |
98 | } |
99 | |
100 | local_irq_restore(flags); |
101 | |
102 | return i; |
103 | } |
104 | |
105 | /* |
106 | * interact_poll() reads and analyzes InterAct joystick data. |
107 | */ |
108 | |
109 | static void interact_poll(struct gameport *gameport) |
110 | { |
111 | struct interact *interact = gameport_get_drvdata(gameport); |
112 | struct input_dev *dev = interact->dev; |
113 | u32 data[3]; |
114 | int i; |
115 | |
116 | interact->reads++; |
117 | |
118 | if (interact_read_packet(gameport: interact->gameport, length: interact->length, data) < interact->length) { |
119 | interact->bads++; |
120 | } else { |
121 | |
122 | for (i = 0; i < 3; i++) |
123 | data[i] <<= INTERACT_MAX_LENGTH - interact->length; |
124 | |
125 | switch (interact->type) { |
126 | |
127 | case INTERACT_TYPE_HHFX: |
128 | |
129 | for (i = 0; i < 4; i++) |
130 | input_report_abs(dev, code: interact_abs_hhfx[i], value: (data[i & 1] >> ((i >> 1) << 3)) & 0xff); |
131 | |
132 | for (i = 0; i < 2; i++) |
133 | input_report_abs(dev, ABS_HAT0Y - i, |
134 | value: ((data[1] >> ((i << 1) + 17)) & 1) - ((data[1] >> ((i << 1) + 16)) & 1)); |
135 | |
136 | for (i = 0; i < 8; i++) |
137 | input_report_key(dev, code: interact_btn_hhfx[i], value: (data[0] >> (i + 16)) & 1); |
138 | |
139 | for (i = 0; i < 4; i++) |
140 | input_report_key(dev, code: interact_btn_hhfx[i + 8], value: (data[1] >> (i + 20)) & 1); |
141 | |
142 | break; |
143 | |
144 | case INTERACT_TYPE_PP8D: |
145 | |
146 | for (i = 0; i < 2; i++) |
147 | input_report_abs(dev, code: interact_abs_pp8d[i], |
148 | value: ((data[0] >> ((i << 1) + 20)) & 1) - ((data[0] >> ((i << 1) + 21)) & 1)); |
149 | |
150 | for (i = 0; i < 8; i++) |
151 | input_report_key(dev, code: interact_btn_pp8d[i], value: (data[1] >> (i + 16)) & 1); |
152 | |
153 | break; |
154 | } |
155 | } |
156 | |
157 | input_sync(dev); |
158 | } |
159 | |
160 | /* |
161 | * interact_open() is a callback from the input open routine. |
162 | */ |
163 | |
164 | static int interact_open(struct input_dev *dev) |
165 | { |
166 | struct interact *interact = input_get_drvdata(dev); |
167 | |
168 | gameport_start_polling(gameport: interact->gameport); |
169 | return 0; |
170 | } |
171 | |
172 | /* |
173 | * interact_close() is a callback from the input close routine. |
174 | */ |
175 | |
176 | static void interact_close(struct input_dev *dev) |
177 | { |
178 | struct interact *interact = input_get_drvdata(dev); |
179 | |
180 | gameport_stop_polling(gameport: interact->gameport); |
181 | } |
182 | |
183 | /* |
184 | * interact_connect() probes for InterAct joysticks. |
185 | */ |
186 | |
187 | static int interact_connect(struct gameport *gameport, struct gameport_driver *drv) |
188 | { |
189 | struct interact *interact; |
190 | struct input_dev *input_dev; |
191 | __u32 data[3]; |
192 | int i, t; |
193 | int err; |
194 | |
195 | interact = kzalloc(size: sizeof(struct interact), GFP_KERNEL); |
196 | input_dev = input_allocate_device(); |
197 | if (!interact || !input_dev) { |
198 | err = -ENOMEM; |
199 | goto fail1; |
200 | } |
201 | |
202 | interact->gameport = gameport; |
203 | interact->dev = input_dev; |
204 | |
205 | gameport_set_drvdata(gameport, data: interact); |
206 | |
207 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); |
208 | if (err) |
209 | goto fail1; |
210 | |
211 | i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data); |
212 | |
213 | if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) { |
214 | err = -ENODEV; |
215 | goto fail2; |
216 | } |
217 | |
218 | for (i = 0; interact_type[i].length; i++) |
219 | if (interact_type[i].id == (data[2] >> 16)) |
220 | break; |
221 | |
222 | if (!interact_type[i].length) { |
223 | printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n" , |
224 | gameport->phys, i, data[0], data[1], data[2]); |
225 | err = -ENODEV; |
226 | goto fail2; |
227 | } |
228 | |
229 | gameport_set_poll_handler(gameport, handler: interact_poll); |
230 | gameport_set_poll_interval(gameport, msecs: 20); |
231 | |
232 | snprintf(buf: interact->phys, size: sizeof(interact->phys), fmt: "%s/input0" , gameport->phys); |
233 | |
234 | interact->type = i; |
235 | interact->length = interact_type[i].length; |
236 | |
237 | input_dev->name = interact_type[i].name; |
238 | input_dev->phys = interact->phys; |
239 | input_dev->id.bustype = BUS_GAMEPORT; |
240 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT; |
241 | input_dev->id.product = interact_type[i].id; |
242 | input_dev->id.version = 0x0100; |
243 | input_dev->dev.parent = &gameport->dev; |
244 | |
245 | input_set_drvdata(dev: input_dev, data: interact); |
246 | |
247 | input_dev->open = interact_open; |
248 | input_dev->close = interact_close; |
249 | |
250 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
251 | |
252 | for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) { |
253 | if (i < interact_type[interact->type].b8) |
254 | input_set_abs_params(dev: input_dev, axis: t, min: 0, max: 255, fuzz: 0, flat: 0); |
255 | else |
256 | input_set_abs_params(dev: input_dev, axis: t, min: -1, max: 1, fuzz: 0, flat: 0); |
257 | } |
258 | |
259 | for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++) |
260 | __set_bit(t, input_dev->keybit); |
261 | |
262 | err = input_register_device(interact->dev); |
263 | if (err) |
264 | goto fail2; |
265 | |
266 | return 0; |
267 | |
268 | fail2: gameport_close(gameport); |
269 | fail1: gameport_set_drvdata(gameport, NULL); |
270 | input_free_device(dev: input_dev); |
271 | kfree(objp: interact); |
272 | return err; |
273 | } |
274 | |
275 | static void interact_disconnect(struct gameport *gameport) |
276 | { |
277 | struct interact *interact = gameport_get_drvdata(gameport); |
278 | |
279 | input_unregister_device(interact->dev); |
280 | gameport_close(gameport); |
281 | gameport_set_drvdata(gameport, NULL); |
282 | kfree(objp: interact); |
283 | } |
284 | |
285 | static struct gameport_driver interact_drv = { |
286 | .driver = { |
287 | .name = "interact" , |
288 | }, |
289 | .description = DRIVER_DESC, |
290 | .connect = interact_connect, |
291 | .disconnect = interact_disconnect, |
292 | }; |
293 | |
294 | module_gameport_driver(interact_drv); |
295 | |