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16#include <linux/kernel.h>
17#include <linux/parport.h>
18#include <linux/input.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/mutex.h>
22#include <linux/slab.h>
23
24MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
25MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
26MODULE_LICENSE("GPL");
27
28#define TGFX_MAX_PORTS 3
29#define TGFX_MAX_DEVICES 7
30
31struct tgfx_config {
32 int args[TGFX_MAX_DEVICES + 1];
33 unsigned int nargs;
34};
35
36static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS];
37
38module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
39MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
40module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
41MODULE_PARM_DESC(map2, "Describes second set of devices");
42module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
43MODULE_PARM_DESC(map3, "Describes third set of devices");
44
45#define TGFX_REFRESH_TIME HZ/100
46
47#define TGFX_TRIGGER 0x08
48#define TGFX_UP 0x10
49#define TGFX_DOWN 0x20
50#define TGFX_LEFT 0x40
51#define TGFX_RIGHT 0x80
52
53#define TGFX_THUMB 0x02
54#define TGFX_THUMB2 0x04
55#define TGFX_TOP 0x01
56#define TGFX_TOP2 0x08
57
58static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
59
60static struct tgfx {
61 struct pardevice *pd;
62 struct timer_list timer;
63 struct input_dev *dev[TGFX_MAX_DEVICES];
64 char name[TGFX_MAX_DEVICES][64];
65 char phys[TGFX_MAX_DEVICES][32];
66 int sticks;
67 int used;
68 int parportno;
69 struct mutex sem;
70} *tgfx_base[TGFX_MAX_PORTS];
71
72
73
74
75
76static void tgfx_timer(struct timer_list *t)
77{
78 struct tgfx *tgfx = from_timer(tgfx, t, timer);
79 struct input_dev *dev;
80 int data1, data2, i;
81
82 for (i = 0; i < 7; i++)
83 if (tgfx->sticks & (1 << i)) {
84
85 dev = tgfx->dev[i];
86
87 parport_write_data(tgfx->pd->port, ~(1 << i));
88 data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
89 data2 = parport_read_control(tgfx->pd->port) ^ 0x04;
90
91 input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
92 input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
93
94 input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
95 input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
96 input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
97 input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
98 input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
99
100 input_sync(dev);
101 }
102
103 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
104}
105
106static int tgfx_open(struct input_dev *dev)
107{
108 struct tgfx *tgfx = input_get_drvdata(dev);
109 int err;
110
111 err = mutex_lock_interruptible(&tgfx->sem);
112 if (err)
113 return err;
114
115 if (!tgfx->used++) {
116 parport_claim(tgfx->pd);
117 parport_write_control(tgfx->pd->port, 0x04);
118 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
119 }
120
121 mutex_unlock(&tgfx->sem);
122 return 0;
123}
124
125static void tgfx_close(struct input_dev *dev)
126{
127 struct tgfx *tgfx = input_get_drvdata(dev);
128
129 mutex_lock(&tgfx->sem);
130 if (!--tgfx->used) {
131 del_timer_sync(&tgfx->timer);
132 parport_write_control(tgfx->pd->port, 0x00);
133 parport_release(tgfx->pd);
134 }
135 mutex_unlock(&tgfx->sem);
136}
137
138
139
140
141
142
143
144static void tgfx_attach(struct parport *pp)
145{
146 struct tgfx *tgfx;
147 struct input_dev *input_dev;
148 struct pardevice *pd;
149 int i, j, port_idx;
150 int *n_buttons, n_devs;
151 struct pardev_cb tgfx_parport_cb;
152
153 for (port_idx = 0; port_idx < TGFX_MAX_PORTS; port_idx++) {
154 if (tgfx_cfg[port_idx].nargs == 0 ||
155 tgfx_cfg[port_idx].args[0] < 0)
156 continue;
157 if (tgfx_cfg[port_idx].args[0] == pp->number)
158 break;
159 }
160
161 if (port_idx == TGFX_MAX_PORTS) {
162 pr_debug("Not using parport%d.\n", pp->number);
163 return;
164 }
165 n_buttons = tgfx_cfg[port_idx].args + 1;
166 n_devs = tgfx_cfg[port_idx].nargs - 1;
167
168 memset(&tgfx_parport_cb, 0, sizeof(tgfx_parport_cb));
169 tgfx_parport_cb.flags = PARPORT_FLAG_EXCL;
170
171 pd = parport_register_dev_model(pp, "turbografx", &tgfx_parport_cb,
172 port_idx);
173 if (!pd) {
174 pr_err("parport busy already - lp.o loaded?\n");
175 return;
176 }
177
178 tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
179 if (!tgfx) {
180 printk(KERN_ERR "turbografx.c: Not enough memory\n");
181 goto err_unreg_pardev;
182 }
183
184 mutex_init(&tgfx->sem);
185 tgfx->pd = pd;
186 tgfx->parportno = pp->number;
187 timer_setup(&tgfx->timer, tgfx_timer, 0);
188
189 for (i = 0; i < n_devs; i++) {
190 if (n_buttons[i] < 1)
191 continue;
192
193 if (n_buttons[i] > ARRAY_SIZE(tgfx_buttons)) {
194 printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
195 goto err_unreg_devs;
196 }
197
198 tgfx->dev[i] = input_dev = input_allocate_device();
199 if (!input_dev) {
200 printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
201 goto err_unreg_devs;
202 }
203
204 tgfx->sticks |= (1 << i);
205 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
206 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
207 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
208 "%s/input%d", tgfx->pd->port->name, i);
209
210 input_dev->name = tgfx->name[i];
211 input_dev->phys = tgfx->phys[i];
212 input_dev->id.bustype = BUS_PARPORT;
213 input_dev->id.vendor = 0x0003;
214 input_dev->id.product = n_buttons[i];
215 input_dev->id.version = 0x0100;
216
217 input_set_drvdata(input_dev, tgfx);
218
219 input_dev->open = tgfx_open;
220 input_dev->close = tgfx_close;
221
222 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
223 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
224 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
225
226 for (j = 0; j < n_buttons[i]; j++)
227 set_bit(tgfx_buttons[j], input_dev->keybit);
228
229 if (input_register_device(tgfx->dev[i]))
230 goto err_free_dev;
231 }
232
233 if (!tgfx->sticks) {
234 printk(KERN_ERR "turbografx.c: No valid devices specified\n");
235 goto err_free_tgfx;
236 }
237
238 tgfx_base[port_idx] = tgfx;
239 return;
240
241 err_free_dev:
242 input_free_device(tgfx->dev[i]);
243 err_unreg_devs:
244 while (--i >= 0)
245 if (tgfx->dev[i])
246 input_unregister_device(tgfx->dev[i]);
247 err_free_tgfx:
248 kfree(tgfx);
249 err_unreg_pardev:
250 parport_unregister_device(pd);
251}
252
253static void tgfx_detach(struct parport *port)
254{
255 int i;
256 struct tgfx *tgfx;
257
258 for (i = 0; i < TGFX_MAX_PORTS; i++) {
259 if (tgfx_base[i] && tgfx_base[i]->parportno == port->number)
260 break;
261 }
262
263 if (i == TGFX_MAX_PORTS)
264 return;
265
266 tgfx = tgfx_base[i];
267 tgfx_base[i] = NULL;
268
269 for (i = 0; i < TGFX_MAX_DEVICES; i++)
270 if (tgfx->dev[i])
271 input_unregister_device(tgfx->dev[i]);
272 parport_unregister_device(tgfx->pd);
273 kfree(tgfx);
274}
275
276static struct parport_driver tgfx_parport_driver = {
277 .name = "turbografx",
278 .match_port = tgfx_attach,
279 .detach = tgfx_detach,
280 .devmodel = true,
281};
282
283static int __init tgfx_init(void)
284{
285 int i;
286 int have_dev = 0;
287
288 for (i = 0; i < TGFX_MAX_PORTS; i++) {
289 if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
290 continue;
291
292 if (tgfx_cfg[i].nargs < 2) {
293 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
294 return -EINVAL;
295 }
296
297 have_dev = 1;
298 }
299
300 if (!have_dev)
301 return -ENODEV;
302
303 return parport_register_driver(&tgfx_parport_driver);
304}
305
306static void __exit tgfx_exit(void)
307{
308 parport_unregister_driver(&tgfx_parport_driver);
309}
310
311module_init(tgfx_init);
312module_exit(tgfx_exit);
313
