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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>
39
40MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
41MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
42MODULE_LICENSE("GPL");
43
44#define TGFX_MAX_PORTS 3
45#define TGFX_MAX_DEVICES 7
46
47struct tgfx_config {
48 int args[TGFX_MAX_DEVICES + 1];
49 unsigned int nargs;
50};
51
52static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS];
53
54module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
55MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
56module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
57MODULE_PARM_DESC(map2, "Describes second set of devices");
58module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
59MODULE_PARM_DESC(map3, "Describes third set of devices");
60
61#define TGFX_REFRESH_TIME HZ/100
62
63#define TGFX_TRIGGER 0x08
64#define TGFX_UP 0x10
65#define TGFX_DOWN 0x20
66#define TGFX_LEFT 0x40
67#define TGFX_RIGHT 0x80
68
69#define TGFX_THUMB 0x02
70#define TGFX_THUMB2 0x04
71#define TGFX_TOP 0x01
72#define TGFX_TOP2 0x08
73
74static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
75
76static struct tgfx {
77 struct pardevice *pd;
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];
82 int sticks;
83 int used;
84 int parportno;
85 struct mutex sem;
86} *tgfx_base[TGFX_MAX_PORTS];
87
88
89
90
91
92static void tgfx_timer(unsigned long private)
93{
94 struct tgfx *tgfx = (void *) private;
95 struct input_dev *dev;
96 int data1, data2, i;
97
98 for (i = 0; i < 7; i++)
99 if (tgfx->sticks & (1 << i)) {
100
101 dev = tgfx->dev[i];
102
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;
106
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 ));
109
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 ));
115
116 input_sync(dev);
117 }
118
119 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
120}
121
122static int tgfx_open(struct input_dev *dev)
123{
124 struct tgfx *tgfx = input_get_drvdata(dev);
125 int err;
126
127 err = mutex_lock_interruptible(&tgfx->sem);
128 if (err)
129 return err;
130
131 if (!tgfx->used++) {
132 parport_claim(tgfx->pd);
133 parport_write_control(tgfx->pd->port, 0x04);
134 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
135 }
136
137 mutex_unlock(&tgfx->sem);
138 return 0;
139}
140
141static void tgfx_close(struct input_dev *dev)
142{
143 struct tgfx *tgfx = input_get_drvdata(dev);
144
145 mutex_lock(&tgfx->sem);
146 if (!--tgfx->used) {
147 del_timer_sync(&tgfx->timer);
148 parport_write_control(tgfx->pd->port, 0x00);
149 parport_release(tgfx->pd);
150 }
151 mutex_unlock(&tgfx->sem);
152}
153
154
155
156
157
158
159
160static void tgfx_attach(struct parport *pp)
161{
162 struct tgfx *tgfx;
163 struct input_dev *input_dev;
164 struct pardevice *pd;
165 int i, j, port_idx;
166 int *n_buttons, n_devs;
167 struct pardev_cb tgfx_parport_cb;
168
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)
172 continue;
173 if (tgfx_cfg[port_idx].args[0] == pp->number)
174 break;
175 }
176
177 if (port_idx == TGFX_MAX_PORTS) {
178 pr_debug("Not using parport%d.\n", pp->number);
179 return;
180 }
181 n_buttons = tgfx_cfg[port_idx].args + 1;
182 n_devs = tgfx_cfg[port_idx].nargs - 1;
183
184 memset(&tgfx_parport_cb, 0, sizeof(tgfx_parport_cb));
185 tgfx_parport_cb.flags = PARPORT_FLAG_EXCL;
186
187 pd = parport_register_dev_model(pp, "turbografx", &tgfx_parport_cb,
188 port_idx);
189 if (!pd) {
190 pr_err("parport busy already - lp.o loaded?\n");
191 return;
192 }
193
194 tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
195 if (!tgfx) {
196 printk(KERN_ERR "turbografx.c: Not enough memory\n");
197 goto err_unreg_pardev;
198 }
199
200 mutex_init(&tgfx->sem);
201 tgfx->pd = pd;
202 tgfx->parportno = pp->number;
203 setup_timer(&tgfx->timer, tgfx_timer, (long)tgfx);
204
205 for (i = 0; i < n_devs; i++) {
206 if (n_buttons[i] < 1)
207 continue;
208
209 if (n_buttons[i] > ARRAY_SIZE(tgfx_buttons)) {
210 printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
211 goto err_unreg_devs;
212 }
213
214 tgfx->dev[i] = input_dev = input_allocate_device();
215 if (!input_dev) {
216 printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
217 goto err_unreg_devs;
218 }
219
220 tgfx->sticks |= (1 << i);
221 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
222 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
223 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
224 "%s/input%d", tgfx->pd->port->name, i);
225
226 input_dev->name = tgfx->name[i];
227 input_dev->phys = tgfx->phys[i];
228 input_dev->id.bustype = BUS_PARPORT;
229 input_dev->id.vendor = 0x0003;
230 input_dev->id.product = n_buttons[i];
231 input_dev->id.version = 0x0100;
232
233 input_set_drvdata(input_dev, tgfx);
234
235 input_dev->open = tgfx_open;
236 input_dev->close = tgfx_close;
237
238 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
239 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
240 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
241
242 for (j = 0; j < n_buttons[i]; j++)
243 set_bit(tgfx_buttons[j], input_dev->keybit);
244
245 if (input_register_device(tgfx->dev[i]))
246 goto err_free_dev;
247 }
248
249 if (!tgfx->sticks) {
250 printk(KERN_ERR "turbografx.c: No valid devices specified\n");
251 goto err_free_tgfx;
252 }
253
254 tgfx_base[port_idx] = tgfx;
255 return;
256
257 err_free_dev:
258 input_free_device(tgfx->dev[i]);
259 err_unreg_devs:
260 while (--i >= 0)
261 if (tgfx->dev[i])
262 input_unregister_device(tgfx->dev[i]);
263 err_free_tgfx:
264 kfree(tgfx);
265 err_unreg_pardev:
266 parport_unregister_device(pd);
267}
268
269static void tgfx_detach(struct parport *port)
270{
271 int i;
272 struct tgfx *tgfx;
273
274 for (i = 0; i < TGFX_MAX_PORTS; i++) {
275 if (tgfx_base[i] && tgfx_base[i]->parportno == port->number)
276 break;
277 }
278
279 if (i == TGFX_MAX_PORTS)
280 return;
281
282 tgfx = tgfx_base[i];
283 tgfx_base[i] = NULL;
284
285 for (i = 0; i < TGFX_MAX_DEVICES; i++)
286 if (tgfx->dev[i])
287 input_unregister_device(tgfx->dev[i]);
288 parport_unregister_device(tgfx->pd);
289 kfree(tgfx);
290}
291
292static struct parport_driver tgfx_parport_driver = {
293 .name = "turbografx",
294 .match_port = tgfx_attach,
295 .detach = tgfx_detach,
296 .devmodel = true,
297};
298
299static int __init tgfx_init(void)
300{
301 int i;
302 int have_dev = 0;
303
304 for (i = 0; i < TGFX_MAX_PORTS; i++) {
305 if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
306 continue;
307
308 if (tgfx_cfg[i].nargs < 2) {
309 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
310 return -EINVAL;
311 }
312
313 have_dev = 1;
314 }
315
316 if (!have_dev)
317 return -ENODEV;
318
319 return parport_register_driver(&tgfx_parport_driver);
320}
321
322static void __exit tgfx_exit(void)
323{
324 parport_unregister_driver(&tgfx_parport_driver);
325}
326
327module_init(tgfx_init);
328module_exit(tgfx_exit);
329
