2 * Copyright (c) 1998-2001 Vojtech Pavlik
4 * Based on the work of:
9 * TurboGraFX parallel port interface driver for Linux.
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.
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.
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
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
32 #include <linux/kernel.h>
33 #include <linux/parport.h>
34 #include <linux/input.h>
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/mutex.h>
38 #include <linux/slab.h>
40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
41 MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
42 MODULE_LICENSE("GPL");
44 #define TGFX_MAX_PORTS 3
45 #define TGFX_MAX_DEVICES 7
48 int args[TGFX_MAX_DEVICES + 1];
52 static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS];
54 module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
55 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
56 module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
57 MODULE_PARM_DESC(map2, "Describes second set of devices");
58 module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
59 MODULE_PARM_DESC(map3, "Describes third set of devices");
61 #define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
63 #define TGFX_TRIGGER 0x08
65 #define TGFX_DOWN 0x20
66 #define TGFX_LEFT 0x40
67 #define TGFX_RIGHT 0x80
69 #define TGFX_THUMB 0x02
70 #define TGFX_THUMB2 0x04
72 #define TGFX_TOP2 0x08
74 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
78 struct timer_list timer;
79 struct input_dev *dev[TGFX_MAX_DEVICES];
80 char name[TGFX_MAX_DEVICES][64];
81 char phys[TGFX_MAX_DEVICES][32];
86 } *tgfx_base[TGFX_MAX_PORTS];
89 * tgfx_timer() reads and analyzes TurboGraFX joystick data.
92 static void tgfx_timer(unsigned long private)
94 struct tgfx *tgfx = (void *) private;
95 struct input_dev *dev;
98 for (i = 0; i < 7; i++)
99 if (tgfx->sticks & (1 << i)) {
103 parport_write_data(tgfx->pd->port, ~(1 << i));
104 data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
105 data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
107 input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
108 input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
110 input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
111 input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
112 input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
113 input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
114 input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
119 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
122 static int tgfx_open(struct input_dev *dev)
124 struct tgfx *tgfx = input_get_drvdata(dev);
127 err = mutex_lock_interruptible(&tgfx->sem);
132 parport_claim(tgfx->pd);
133 parport_write_control(tgfx->pd->port, 0x04);
134 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
137 mutex_unlock(&tgfx->sem);
141 static void tgfx_close(struct input_dev *dev)
143 struct tgfx *tgfx = input_get_drvdata(dev);
145 mutex_lock(&tgfx->sem);
147 del_timer_sync(&tgfx->timer);
148 parport_write_control(tgfx->pd->port, 0x00);
149 parport_release(tgfx->pd);
151 mutex_unlock(&tgfx->sem);
157 * tgfx_probe() probes for tg gamepads.
160 static void tgfx_attach(struct parport *pp)
163 struct input_dev *input_dev;
164 struct pardevice *pd;
166 int *n_buttons, n_devs;
167 struct pardev_cb tgfx_parport_cb;
169 for (port_idx = 0; port_idx < TGFX_MAX_PORTS; port_idx++) {
170 if (tgfx_cfg[port_idx].nargs == 0 ||
171 tgfx_cfg[port_idx].args[0] < 0)
173 if (tgfx_cfg[port_idx].args[0] == pp->number)
177 if (port_idx == TGFX_MAX_PORTS) {
178 pr_debug("Not using parport%d.\n", pp->number);
181 n_buttons = tgfx_cfg[port_idx].args + 1;
182 n_devs = tgfx_cfg[port_idx].nargs - 1;
184 memset(&tgfx_parport_cb, 0, sizeof(tgfx_parport_cb));
185 tgfx_parport_cb.flags = PARPORT_FLAG_EXCL;
187 pd = parport_register_dev_model(pp, "turbografx", &tgfx_parport_cb,
190 pr_err("parport busy already - lp.o loaded?\n");
194 tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
196 printk(KERN_ERR "turbografx.c: Not enough memory\n");
197 goto err_unreg_pardev;
200 mutex_init(&tgfx->sem);
202 tgfx->parportno = pp->number;
203 init_timer(&tgfx->timer);
204 tgfx->timer.data = (long) tgfx;
205 tgfx->timer.function = tgfx_timer;
207 for (i = 0; i < n_devs; i++) {
208 if (n_buttons[i] < 1)
211 if (n_buttons[i] > ARRAY_SIZE(tgfx_buttons)) {
212 printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
216 tgfx->dev[i] = input_dev = input_allocate_device();
218 printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
222 tgfx->sticks |= (1 << i);
223 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
224 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
225 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
226 "%s/input%d", tgfx->pd->port->name, i);
228 input_dev->name = tgfx->name[i];
229 input_dev->phys = tgfx->phys[i];
230 input_dev->id.bustype = BUS_PARPORT;
231 input_dev->id.vendor = 0x0003;
232 input_dev->id.product = n_buttons[i];
233 input_dev->id.version = 0x0100;
235 input_set_drvdata(input_dev, tgfx);
237 input_dev->open = tgfx_open;
238 input_dev->close = tgfx_close;
240 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
241 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
242 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
244 for (j = 0; j < n_buttons[i]; j++)
245 set_bit(tgfx_buttons[j], input_dev->keybit);
247 if (input_register_device(tgfx->dev[i]))
252 printk(KERN_ERR "turbografx.c: No valid devices specified\n");
256 tgfx_base[port_idx] = tgfx;
260 input_free_device(tgfx->dev[i]);
264 input_unregister_device(tgfx->dev[i]);
268 parport_unregister_device(pd);
271 static void tgfx_detach(struct parport *port)
276 for (i = 0; i < TGFX_MAX_PORTS; i++) {
277 if (tgfx_base[i] && tgfx_base[i]->parportno == port->number)
281 if (i == TGFX_MAX_PORTS)
287 for (i = 0; i < TGFX_MAX_DEVICES; i++)
289 input_unregister_device(tgfx->dev[i]);
290 parport_unregister_device(tgfx->pd);
294 static struct parport_driver tgfx_parport_driver = {
295 .name = "turbografx",
296 .match_port = tgfx_attach,
297 .detach = tgfx_detach,
301 static int __init tgfx_init(void)
306 for (i = 0; i < TGFX_MAX_PORTS; i++) {
307 if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
310 if (tgfx_cfg[i].nargs < 2) {
311 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
321 return parport_register_driver(&tgfx_parport_driver);
324 static void __exit tgfx_exit(void)
326 parport_unregister_driver(&tgfx_parport_driver);
329 module_init(tgfx_init);
330 module_exit(tgfx_exit);