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34#include <linux/kernel.h>
35#include <linux/parport.h>
36#include <linux/input.h>
37#include <linux/module.h>
38#include <linux/moduleparam.h>
39#include <linux/init.h>
40#include <linux/mutex.h>
41
42MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
44MODULE_LICENSE("GPL");
45
46#define TGFX_MAX_PORTS 3
47#define TGFX_MAX_DEVICES 7
48
49struct tgfx_config {
50 int args[TGFX_MAX_DEVICES + 1];
51 unsigned int nargs;
52};
53
54static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS] __initdata;
55
56module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
57MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
58module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
59MODULE_PARM_DESC(map2, "Describes second set of devices");
60module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
61MODULE_PARM_DESC(map3, "Describes third set of devices");
62
63#define TGFX_REFRESH_TIME HZ/100
64
65#define TGFX_TRIGGER 0x08
66#define TGFX_UP 0x10
67#define TGFX_DOWN 0x20
68#define TGFX_LEFT 0x40
69#define TGFX_RIGHT 0x80
70
71#define TGFX_THUMB 0x02
72#define TGFX_THUMB2 0x04
73#define TGFX_TOP 0x01
74#define TGFX_TOP2 0x08
75
76static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
77
78static struct tgfx {
79 struct pardevice *pd;
80 struct timer_list timer;
81 struct input_dev *dev[TGFX_MAX_DEVICES];
82 char name[TGFX_MAX_DEVICES][64];
83 char phys[TGFX_MAX_DEVICES][32];
84 int sticks;
85 int used;
86 struct mutex sem;
87} *tgfx_base[TGFX_MAX_PORTS];
88
89
90
91
92
93static void tgfx_timer(unsigned long private)
94{
95 struct tgfx *tgfx = (void *) private;
96 struct input_dev *dev;
97 int data1, data2, i;
98
99 for (i = 0; i < 7; i++)
100 if (tgfx->sticks & (1 << i)) {
101
102 dev = tgfx->dev[i];
103
104 parport_write_data(tgfx->pd->port, ~(1 << i));
105 data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
106 data2 = parport_read_control(tgfx->pd->port) ^ 0x04;
107
108 input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
109 input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
110
111 input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
112 input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
113 input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
114 input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
115 input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
116
117 input_sync(dev);
118 }
119
120 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
121}
122
123static int tgfx_open(struct input_dev *dev)
124{
125 struct tgfx *tgfx = input_get_drvdata(dev);
126 int err;
127
128 err = mutex_lock_interruptible(&tgfx->sem);
129 if (err)
130 return err;
131
132 if (!tgfx->used++) {
133 parport_claim(tgfx->pd);
134 parport_write_control(tgfx->pd->port, 0x04);
135 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
136 }
137
138 mutex_unlock(&tgfx->sem);
139 return 0;
140}
141
142static void tgfx_close(struct input_dev *dev)
143{
144 struct tgfx *tgfx = input_get_drvdata(dev);
145
146 mutex_lock(&tgfx->sem);
147 if (!--tgfx->used) {
148 del_timer_sync(&tgfx->timer);
149 parport_write_control(tgfx->pd->port, 0x00);
150 parport_release(tgfx->pd);
151 }
152 mutex_unlock(&tgfx->sem);
153}
154
155
156
157
158
159
160
161static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs)
162{
163 struct tgfx *tgfx;
164 struct input_dev *input_dev;
165 struct parport *pp;
166 struct pardevice *pd;
167 int i, j;
168 int err;
169
170 pp = parport_find_number(parport);
171 if (!pp) {
172 printk(KERN_ERR "turbografx.c: no such parport\n");
173 err = -EINVAL;
174 goto err_out;
175 }
176
177 pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
178 if (!pd) {
179 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
180 err = -EBUSY;
181 goto err_put_pp;
182 }
183
184 tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
185 if (!tgfx) {
186 printk(KERN_ERR "turbografx.c: Not enough memory\n");
187 err = -ENOMEM;
188 goto err_unreg_pardev;
189 }
190
191 mutex_init(&tgfx->sem);
192 tgfx->pd = pd;
193 init_timer(&tgfx->timer);
194 tgfx->timer.data = (long) tgfx;
195 tgfx->timer.function = tgfx_timer;
196
197 for (i = 0; i < n_devs; i++) {
198 if (n_buttons[i] < 1)
199 continue;
200
201 if (n_buttons[i] > 6) {
202 printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
203 err = -EINVAL;
204 goto err_unreg_devs;
205 }
206
207 tgfx->dev[i] = input_dev = input_allocate_device();
208 if (!input_dev) {
209 printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
210 err = -ENOMEM;
211 goto err_unreg_devs;
212 }
213
214 tgfx->sticks |= (1 << i);
215 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
216 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
217 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
218 "%s/input%d", tgfx->pd->port->name, i);
219
220 input_dev->name = tgfx->name[i];
221 input_dev->phys = tgfx->phys[i];
222 input_dev->id.bustype = BUS_PARPORT;
223 input_dev->id.vendor = 0x0003;
224 input_dev->id.product = n_buttons[i];
225 input_dev->id.version = 0x0100;
226
227 input_set_drvdata(input_dev, tgfx);
228
229 input_dev->open = tgfx_open;
230 input_dev->close = tgfx_close;
231
232 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
233 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
234 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
235
236 for (j = 0; j < n_buttons[i]; j++)
237 set_bit(tgfx_buttons[j], input_dev->keybit);
238
239 err = input_register_device(tgfx->dev[i]);
240 if (err)
241 goto err_free_dev;
242 }
243
244 if (!tgfx->sticks) {
245 printk(KERN_ERR "turbografx.c: No valid devices specified\n");
246 err = -EINVAL;
247 goto err_free_tgfx;
248 }
249
250 return tgfx;
251
252 err_free_dev:
253 input_free_device(tgfx->dev[i]);
254 err_unreg_devs:
255 while (--i >= 0)
256 if (tgfx->dev[i])
257 input_unregister_device(tgfx->dev[i]);
258 err_free_tgfx:
259 kfree(tgfx);
260 err_unreg_pardev:
261 parport_unregister_device(pd);
262 err_put_pp:
263 parport_put_port(pp);
264 err_out:
265 return ERR_PTR(err);
266}
267
268static void tgfx_remove(struct tgfx *tgfx)
269{
270 int i;
271
272 for (i = 0; i < TGFX_MAX_DEVICES; i++)
273 if (tgfx->dev[i])
274 input_unregister_device(tgfx->dev[i]);
275 parport_unregister_device(tgfx->pd);
276 kfree(tgfx);
277}
278
279static int __init tgfx_init(void)
280{
281 int i;
282 int have_dev = 0;
283 int err = 0;
284
285 for (i = 0; i < TGFX_MAX_PORTS; i++) {
286 if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
287 continue;
288
289 if (tgfx_cfg[i].nargs < 2) {
290 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
291 err = -EINVAL;
292 break;
293 }
294
295 tgfx_base[i] = tgfx_probe(tgfx_cfg[i].args[0],
296 tgfx_cfg[i].args + 1,
297 tgfx_cfg[i].nargs - 1);
298 if (IS_ERR(tgfx_base[i])) {
299 err = PTR_ERR(tgfx_base[i]);
300 break;
301 }
302
303 have_dev = 1;
304 }
305
306 if (err) {
307 while (--i >= 0)
308 if (tgfx_base[i])
309 tgfx_remove(tgfx_base[i]);
310 return err;
311 }
312
313 return have_dev ? 0 : -ENODEV;
314}
315
316static void __exit tgfx_exit(void)
317{
318 int i;
319
320 for (i = 0; i < TGFX_MAX_PORTS; i++)
321 if (tgfx_base[i])
322 tgfx_remove(tgfx_base[i]);
323}
324
325module_init(tgfx_init);
326module_exit(tgfx_exit);
327
