2 * Copyright (c) 2001 Vojtech Pavlik
6 * Guillemot Digital Interface Protocol driver for Linux
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 * Should you need to contact me, the author, you can do so either by
25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29 #include <linux/kernel.h>
30 #include <linux/slab.h>
31 #include <linux/module.h>
32 #include <linux/delay.h>
33 #include <linux/gameport.h>
34 #include <linux/input.h>
35 #include <linux/jiffies.h>
37 #define DRIVER_DESC "Guillemot Digital joystick driver"
39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
40 MODULE_DESCRIPTION(DRIVER_DESC);
41 MODULE_LICENSE("GPL");
43 #define GUILLEMOT_MAX_START 600 /* 600 us */
44 #define GUILLEMOT_MAX_STROBE 60 /* 60 us */
45 #define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */
47 static short guillemot_abs_pad[] =
48 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
50 static short guillemot_btn_pad[] =
51 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
56 } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
58 struct guillemot_type {
67 struct gameport *gameport;
68 struct input_dev *dev;
71 struct guillemot_type *type;
76 static struct guillemot_type guillemot_type[] = {
77 { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
81 * guillemot_read_packet() reads Guillemot joystick data.
84 static int guillemot_read_packet(struct gameport *gameport, u8 *data)
91 for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
95 t = gameport_time(gameport, GUILLEMOT_MAX_START);
96 s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);
98 local_irq_save(flags);
99 gameport_trigger(gameport);
100 v = gameport_read(gameport);
102 while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
104 u = v; v = gameport_read(gameport);
106 data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
112 local_irq_restore(flags);
118 * guillemot_poll() reads and analyzes Guillemot joystick data.
121 static void guillemot_poll(struct gameport *gameport)
123 struct guillemot *guillemot = gameport_get_drvdata(gameport);
124 struct input_dev *dev = guillemot->dev;
125 u8 data[GUILLEMOT_MAX_LENGTH];
130 if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
131 data[0] != 0x55 || data[16] != 0xaa) {
135 for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
136 input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);
138 if (guillemot->type->hat) {
139 input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
140 input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
143 for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
144 input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
151 * guillemot_open() is a callback from the input open routine.
154 static int guillemot_open(struct input_dev *dev)
156 struct guillemot *guillemot = input_get_drvdata(dev);
158 gameport_start_polling(guillemot->gameport);
163 * guillemot_close() is a callback from the input close routine.
166 static void guillemot_close(struct input_dev *dev)
168 struct guillemot *guillemot = input_get_drvdata(dev);
170 gameport_stop_polling(guillemot->gameport);
174 * guillemot_connect() probes for Guillemot joysticks.
177 static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
179 struct guillemot *guillemot;
180 struct input_dev *input_dev;
181 u8 data[GUILLEMOT_MAX_LENGTH];
185 guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL);
186 input_dev = input_allocate_device();
187 if (!guillemot || !input_dev) {
192 guillemot->gameport = gameport;
193 guillemot->dev = input_dev;
195 gameport_set_drvdata(gameport, guillemot);
197 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
201 i = guillemot_read_packet(gameport, data);
203 if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
208 for (i = 0; guillemot_type[i].name; i++)
209 if (guillemot_type[i].id == data[11])
212 if (!guillemot_type[i].name) {
213 printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
214 gameport->phys, data[12], data[13], data[11], data[14], data[15]);
219 gameport_set_poll_handler(gameport, guillemot_poll);
220 gameport_set_poll_interval(gameport, 20);
222 snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
223 guillemot->type = guillemot_type + i;
225 input_dev->name = guillemot_type[i].name;
226 input_dev->phys = guillemot->phys;
227 input_dev->id.bustype = BUS_GAMEPORT;
228 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
229 input_dev->id.product = guillemot_type[i].id;
230 input_dev->id.version = (int)data[14] << 8 | data[15];
231 input_dev->dev.parent = &gameport->dev;
233 input_set_drvdata(input_dev, guillemot);
235 input_dev->open = guillemot_open;
236 input_dev->close = guillemot_close;
238 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
240 for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
241 input_set_abs_params(input_dev, t, 0, 255, 0, 0);
243 if (guillemot->type->hat) {
244 input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
245 input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
248 for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
249 set_bit(t, input_dev->keybit);
251 err = input_register_device(guillemot->dev);
257 fail2: gameport_close(gameport);
258 fail1: gameport_set_drvdata(gameport, NULL);
259 input_free_device(input_dev);
264 static void guillemot_disconnect(struct gameport *gameport)
266 struct guillemot *guillemot = gameport_get_drvdata(gameport);
268 printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
269 input_unregister_device(guillemot->dev);
270 gameport_close(gameport);
274 static struct gameport_driver guillemot_drv = {
278 .description = DRIVER_DESC,
279 .connect = guillemot_connect,
280 .disconnect = guillemot_disconnect,
283 module_gameport_driver(guillemot_drv);