1/*
2 *  Copyright (c) 2001 Vojtech Pavlik
3 *
4 *  Based on the work of:
5 *	Toby Deshane
6 */
7
8/*
9 * InterAct digital gamepad/joystick driver for Linux
10 */
11
12/*
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 * Should you need to contact me, the author, you can do so either by
28 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
29 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
30 */
31
32#include <linux/kernel.h>
33#include <linux/slab.h>
34#include <linux/module.h>
35#include <linux/delay.h>
36#include <linux/gameport.h>
37#include <linux/input.h>
38#include <linux/jiffies.h>
39
40#define DRIVER_DESC	"InterAct digital joystick driver"
41
42MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43MODULE_DESCRIPTION(DRIVER_DESC);
44MODULE_LICENSE("GPL");
45
46#define INTERACT_MAX_START	600	/* 400 us */
47#define INTERACT_MAX_STROBE	60	/* 40 us */
48#define INTERACT_MAX_LENGTH	32	/* 32 bits */
49
50#define INTERACT_TYPE_HHFX	0	/* HammerHead/FX */
51#define INTERACT_TYPE_PP8D	1	/* ProPad 8 */
52
53struct interact {
54	struct gameport *gameport;
55	struct input_dev *dev;
56	int bads;
57	int reads;
58	unsigned char type;
59	unsigned char length;
60	char phys[32];
61};
62
63static short interact_abs_hhfx[] =
64	{ ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 };
65static short interact_abs_pp8d[] =
66	{ ABS_X, ABS_Y, -1 };
67
68static short interact_btn_hhfx[] =
69	{ 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 };
70static short interact_btn_pp8d[] =
71	{ BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 };
72
73struct interact_type {
74	int id;
75	short *abs;
76	short *btn;
77	char *name;
78	unsigned char length;
79	unsigned char b8;
80};
81
82static struct interact_type interact_type[] = {
83	{ 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX",    32, 4 },
84	{ 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 },
85	{ 0 }};
86
87/*
88 * interact_read_packet() reads and InterAct joystick data.
89 */
90
91static int interact_read_packet(struct gameport *gameport, int length, u32 *data)
92{
93	unsigned long flags;
94	unsigned char u, v;
95	unsigned int t, s;
96	int i;
97
98	i = 0;
99	data[0] = data[1] = data[2] = 0;
100	t = gameport_time(gameport, INTERACT_MAX_START);
101	s = gameport_time(gameport, INTERACT_MAX_STROBE);
102
103	local_irq_save(flags);
104	gameport_trigger(gameport);
105	v = gameport_read(gameport);
106
107	while (t > 0 && i < length) {
108		t--;
109		u = v; v = gameport_read(gameport);
110		if (v & ~u & 0x40) {
111			data[0] = (data[0] << 1) | ((v >> 4) & 1);
112			data[1] = (data[1] << 1) | ((v >> 5) & 1);
113			data[2] = (data[2] << 1) | ((v >> 7) & 1);
114			i++;
115			t = s;
116		}
117	}
118
119	local_irq_restore(flags);
120
121	return i;
122}
123
124/*
125 * interact_poll() reads and analyzes InterAct joystick data.
126 */
127
128static void interact_poll(struct gameport *gameport)
129{
130	struct interact *interact = gameport_get_drvdata(gameport);
131	struct input_dev *dev = interact->dev;
132	u32 data[3];
133	int i;
134
135	interact->reads++;
136
137	if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) {
138		interact->bads++;
139	} else {
140
141		for (i = 0; i < 3; i++)
142			data[i] <<= INTERACT_MAX_LENGTH - interact->length;
143
144		switch (interact->type) {
145
146			case INTERACT_TYPE_HHFX:
147
148				for (i = 0; i < 4; i++)
149					input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff);
150
151				for (i = 0; i < 2; i++)
152					input_report_abs(dev, ABS_HAT0Y - i,
153						((data[1] >> ((i << 1) + 17)) & 1)  - ((data[1] >> ((i << 1) + 16)) & 1));
154
155				for (i = 0; i < 8; i++)
156					input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1);
157
158				for (i = 0; i < 4; i++)
159					input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1);
160
161				break;
162
163			case INTERACT_TYPE_PP8D:
164
165				for (i = 0; i < 2; i++)
166					input_report_abs(dev, interact_abs_pp8d[i],
167						((data[0] >> ((i << 1) + 20)) & 1)  - ((data[0] >> ((i << 1) + 21)) & 1));
168
169				for (i = 0; i < 8; i++)
170					input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1);
171
172				break;
173		}
174	}
175
176	input_sync(dev);
177}
178
179/*
180 * interact_open() is a callback from the input open routine.
181 */
182
183static int interact_open(struct input_dev *dev)
184{
185	struct interact *interact = input_get_drvdata(dev);
186
187	gameport_start_polling(interact->gameport);
188	return 0;
189}
190
191/*
192 * interact_close() is a callback from the input close routine.
193 */
194
195static void interact_close(struct input_dev *dev)
196{
197	struct interact *interact = input_get_drvdata(dev);
198
199	gameport_stop_polling(interact->gameport);
200}
201
202/*
203 * interact_connect() probes for InterAct joysticks.
204 */
205
206static int interact_connect(struct gameport *gameport, struct gameport_driver *drv)
207{
208	struct interact *interact;
209	struct input_dev *input_dev;
210	__u32 data[3];
211	int i, t;
212	int err;
213
214	interact = kzalloc(sizeof(struct interact), GFP_KERNEL);
215	input_dev = input_allocate_device();
216	if (!interact || !input_dev) {
217		err = -ENOMEM;
218		goto fail1;
219	}
220
221	interact->gameport = gameport;
222	interact->dev = input_dev;
223
224	gameport_set_drvdata(gameport, interact);
225
226	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
227	if (err)
228		goto fail1;
229
230	i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data);
231
232	if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) {
233		err = -ENODEV;
234		goto fail2;
235	}
236
237	for (i = 0; interact_type[i].length; i++)
238		if (interact_type[i].id == (data[2] >> 16))
239			break;
240
241	if (!interact_type[i].length) {
242		printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n",
243			gameport->phys, i, data[0], data[1], data[2]);
244		err = -ENODEV;
245		goto fail2;
246	}
247
248	gameport_set_poll_handler(gameport, interact_poll);
249	gameport_set_poll_interval(gameport, 20);
250
251	snprintf(interact->phys, sizeof(interact->phys), "%s/input0", gameport->phys);
252
253	interact->type = i;
254	interact->length = interact_type[i].length;
255
256	input_dev->name = interact_type[i].name;
257	input_dev->phys = interact->phys;
258	input_dev->id.bustype = BUS_GAMEPORT;
259	input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT;
260	input_dev->id.product = interact_type[i].id;
261	input_dev->id.version = 0x0100;
262	input_dev->dev.parent = &gameport->dev;
263
264	input_set_drvdata(input_dev, interact);
265
266	input_dev->open = interact_open;
267	input_dev->close = interact_close;
268
269	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
270
271	for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) {
272		if (i < interact_type[interact->type].b8)
273			input_set_abs_params(input_dev, t, 0, 255, 0, 0);
274		else
275			input_set_abs_params(input_dev, t, -1, 1, 0, 0);
276	}
277
278	for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++)
279		__set_bit(t, input_dev->keybit);
280
281	err = input_register_device(interact->dev);
282	if (err)
283		goto fail2;
284
285	return 0;
286
287fail2:	gameport_close(gameport);
288fail1:  gameport_set_drvdata(gameport, NULL);
289	input_free_device(input_dev);
290	kfree(interact);
291	return err;
292}
293
294static void interact_disconnect(struct gameport *gameport)
295{
296	struct interact *interact = gameport_get_drvdata(gameport);
297
298	input_unregister_device(interact->dev);
299	gameport_close(gameport);
300	gameport_set_drvdata(gameport, NULL);
301	kfree(interact);
302}
303
304static struct gameport_driver interact_drv = {
305	.driver		= {
306		.name	= "interact",
307	},
308	.description	= DRIVER_DESC,
309	.connect	= interact_connect,
310	.disconnect	= interact_disconnect,
311};
312
313module_gameport_driver(interact_drv);
314