projects/linux·blob master · refs

294 lines · 6.9 KiB

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
23MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
24MODULE_DESCRIPTION(DRIVER_DESC);
25MODULE_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
34struct 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
44static short interact_abs_hhfx[] =
45 { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 };
46static short interact_abs_pp8d[] =
47 { ABS_X, ABS_Y, -1 };
48
49static 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 };
51static short interact_btn_pp8d[] =
52 { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 };
53
54struct interact_type {
55 int id;
56 short *abs;
57 short *btn;
58 char *name;
59 unsigned char length;
60 unsigned char b8;
61};
62
63static 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
72static 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
109static 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(interact->gameport, 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, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff);
131
132 for (i = 0; i < 2; i++)
133 input_report_abs(dev, ABS_HAT0Y - i,
134 ((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, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1);
138
139 for (i = 0; i < 4; i++)
140 input_report_key(dev, interact_btn_hhfx[i + 8], (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, interact_abs_pp8d[i],
148 ((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, interact_btn_pp8d[i], (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
164static int interact_open(struct input_dev *dev)
165{
166 struct interact *interact = input_get_drvdata(dev);
167
168 gameport_start_polling(interact->gameport);
169 return 0;
170}
171
172/*
173 * interact_close() is a callback from the input close routine.
174 */
175
176static void interact_close(struct input_dev *dev)
177{
178 struct interact *interact = input_get_drvdata(dev);
179
180 gameport_stop_polling(interact->gameport);
181}
182
183/*
184 * interact_connect() probes for InterAct joysticks.
185 */
186
187static 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_obj(*interact);
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, 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, interact_poll);
230 gameport_set_poll_interval(gameport, 20);
231
232 snprintf(interact->phys, sizeof(interact->phys), "%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(input_dev, 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(input_dev, t, 0, 255, 0, 0);
255 else
256 input_set_abs_params(input_dev, t, -1, 1, 0, 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
268fail2: gameport_close(gameport);
269fail1: gameport_set_drvdata(gameport, NULL);
270 input_free_device(input_dev);
271 kfree(interact);
272 return err;
273}
274
275static 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(interact);
283}
284
285static 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
294module_gameport_driver(interact_drv);