drivers/input/joystick/turbografx.c

   1 /*
   2  * $Id: turbografx.c,v 1.14 2002/01/22 20:30:39 vojtech Exp $
   3  *
   4  *  Copyright (c) 1998-2001 Vojtech Pavlik
   5  *
   6  *  Based on the work of:
   7  *      Steffen Schwenke
   8  */
   9
  10 /*
  11  * TurboGraFX parallel port interface driver for Linux.
  12  */
  13
  14 /*
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  28  *
  29  * Should you need to contact me, the author, you can do so either by
  30  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  31  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  32  */
  33
  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
  41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  42 MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
  43 MODULE_LICENSE("GPL");
  44
  45 #define TGFX_MAX_PORTS          3
  46 #define TGFX_MAX_DEVICES        7
  47
  48 struct tgfx_config {
  49         int args[TGFX_MAX_DEVICES + 1];
  50         int nargs;
  51 };
  52
  53 static struct tgfx_config tgfx[TGFX_MAX_PORTS] __initdata;
  54
  55 module_param_array_named(map, tgfx[0].args, int, &tgfx[0].nargs, 0);
  56 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
  57 module_param_array_named(map2, tgfx[1].args, int, &tgfx[1].nargs, 0);
  58 MODULE_PARM_DESC(map2, "Describes second set of devices");
  59 module_param_array_named(map3, tgfx[2].args, int, &tgfx[2].nargs, 0);
  60 MODULE_PARM_DESC(map3, "Describes third set of devices");
  61
  62 __obsolete_setup("tgfx=");
  63 __obsolete_setup("tgfx_2=");
  64 __obsolete_setup("tgfx_3=");
  65
  66 #define TGFX_REFRESH_TIME       HZ/100  /* 10 ms */
  67
  68 #define TGFX_TRIGGER            0x08
  69 #define TGFX_UP                 0x10
  70 #define TGFX_DOWN               0x20
  71 #define TGFX_LEFT               0x40
  72 #define TGFX_RIGHT              0x80
  73
  74 #define TGFX_THUMB              0x02
  75 #define TGFX_THUMB2             0x04
  76 #define TGFX_TOP                0x01
  77 #define TGFX_TOP2               0x08
  78
  79 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
  80
  81 static struct tgfx {
  82         struct pardevice *pd;
  83         struct timer_list timer;
  84         struct input_dev *dev[TGFX_MAX_DEVICES];
  85         char name[TGFX_MAX_DEVICES][64];
  86         char phys[TGFX_MAX_DEVICES][32];
  87         int sticks;
  88         int used;
  89         struct semaphore sem;
  90 } *tgfx_base[TGFX_MAX_PORTS];
  91
  92 /*
  93  * tgfx_timer() reads and analyzes TurboGraFX joystick data.
  94  */
  95
  96 static void tgfx_timer(unsigned long private)
  97 {
  98         struct tgfx *tgfx = (void *) private;
  99         struct input_dev *dev;
 100         int data1, data2, i;
 101
 102         for (i = 0; i < 7; i++)
 103                 if (tgfx->sticks & (1 << i)) {
 104
 105                         dev = tgfx->dev[i];
 106
 107                         parport_write_data(tgfx->pd->port, ~(1 << i));
 108                         data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
 109                         data2 = parport_read_control(tgfx->pd->port) ^ 0x04;    /* CAVEAT parport */
 110
 111                         input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
 112                         input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP  ));
 113
 114                         input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
 115                         input_report_key(dev, BTN_THUMB,   (data2 & TGFX_THUMB  ));
 116                         input_report_key(dev, BTN_THUMB2,  (data2 & TGFX_THUMB2 ));
 117                         input_report_key(dev, BTN_TOP,     (data2 & TGFX_TOP    ));
 118                         input_report_key(dev, BTN_TOP2,    (data2 & TGFX_TOP2   ));
 119
 120                         input_sync(dev);
 121                 }
 122
 123         mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
 124 }
 125
 126 static int tgfx_open(struct input_dev *dev)
 127 {
 128         struct tgfx *tgfx = dev->private;
 129         int err;
 130
 131         err = down_interruptible(&tgfx->sem);
 132         if (err)
 133                 return err;
 134
 135         if (!tgfx->used++) {
 136                 parport_claim(tgfx->pd);
 137                 parport_write_control(tgfx->pd->port, 0x04);
 138                 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
 139         }
 140
 141         up(&tgfx->sem);
 142         return 0;
 143 }
 144
 145 static void tgfx_close(struct input_dev *dev)
 146 {
 147         struct tgfx *tgfx = dev->private;
 148
 149         down(&tgfx->sem);
 150         if (!--tgfx->used) {
 151                 del_timer_sync(&tgfx->timer);
 152                 parport_write_control(tgfx->pd->port, 0x00);
 153                 parport_release(tgfx->pd);
 154         }
 155         up(&tgfx->sem);
 156 }
 157
 158
 159
 160 /*
 161  * tgfx_probe() probes for tg gamepads.
 162  */
 163
 164 static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs)
 165 {
 166         struct tgfx *tgfx;
 167         struct input_dev *input_dev;
 168         struct parport *pp;
 169         struct pardevice *pd;
 170         int i, j;
 171         int err;
 172
 173         pp = parport_find_number(parport);
 174         if (!pp) {
 175                 printk(KERN_ERR "turbografx.c: no such parport\n");
 176                 err = -EINVAL;
 177                 goto err_out;
 178         }
 179
 180         pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
 181         if (!pd) {
 182                 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
 183                 err = -EBUSY;
 184                 goto err_put_pp;
 185         }
 186
 187         tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
 188         if (!tgfx) {
 189                 printk(KERN_ERR "turbografx.c: Not enough memory\n");
 190                 err = -ENOMEM;
 191                 goto err_unreg_pardev;
 192         }
 193
 194         init_MUTEX(&tgfx->sem);
 195         tgfx->pd = pd;
 196         init_timer(&tgfx->timer);
 197         tgfx->timer.data = (long) tgfx;
 198         tgfx->timer.function = tgfx_timer;
 199
 200         for (i = 0; i < n_devs; i++) {
 201                 if (n_buttons[i] < 1)
 202                         continue;
 203
 204                 if (n_buttons[i] > 6) {
 205                         printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
 206                         err = -EINVAL;
 207                         goto err_free_devs;
 208                 }
 209
 210                 tgfx->dev[i] = input_dev = input_allocate_device();
 211                 if (!input_dev) {
 212                         printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
 213                         err = -ENOMEM;
 214                         goto err_free_devs;
 215                 }
 216
 217                 tgfx->sticks |= (1 << i);
 218                 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
 219                          "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
 220                 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
 221                          "%s/input%d", tgfx->pd->port->name, i);
 222
 223                 input_dev->name = tgfx->name[i];
 224                 input_dev->phys = tgfx->phys[i];
 225                 input_dev->id.bustype = BUS_PARPORT;
 226                 input_dev->id.vendor = 0x0003;
 227                 input_dev->id.product = n_buttons[i];
 228                 input_dev->id.version = 0x0100;
 229
 230                 input_dev->private = tgfx;
 231                 input_dev->open = tgfx_open;
 232                 input_dev->close = tgfx_close;
 233
 234                 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 235                 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
 236                 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
 237
 238                 for (j = 0; j < n_buttons[i]; j++)
 239                         set_bit(tgfx_buttons[j], input_dev->keybit);
 240
 241                 input_register_device(tgfx->dev[i]);
 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_devs:
 253         while (--i >= 0)
 254                 input_unregister_device(tgfx->dev[i]);
 255  err_free_tgfx:
 256         kfree(tgfx);
 257  err_unreg_pardev:
 258         parport_unregister_device(pd);
 259  err_put_pp:
 260         parport_put_port(pp);
 261  err_out:
 262         return ERR_PTR(err);
 263 }
 264
 265 static void __exit tgfx_remove(struct tgfx *tgfx)
 266 {
 267         int i;
 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
 276 static int __init tgfx_init(void)
 277 {
 278         int i;
 279         int have_dev = 0;
 280         int err = 0;
 281
 282         for (i = 0; i < TGFX_MAX_PORTS; i++) {
 283                 if (tgfx[i].nargs == 0 || tgfx[i].args[0] < 0)
 284                         continue;
 285
 286                 if (tgfx[i].nargs < 2) {
 287                         printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
 288                         err = -EINVAL;
 289                         break;
 290                 }
 291
 292                 tgfx_base[i] = tgfx_probe(tgfx[i].args[0], tgfx[i].args + 1, tgfx[i].nargs - 1);
 293                 if (IS_ERR(tgfx_base[i])) {
 294                         err = PTR_ERR(tgfx_base[i]);
 295                         break;
 296                 }
 297
 298                 have_dev = 1;
 299         }
 300
 301         if (err) {
 302                 while (--i >= 0)
 303                         tgfx_remove(tgfx_base[i]);
 304                 return err;
 305         }
 306
 307         return have_dev ? 0 : -ENODEV;
 308 }
 309
 310 static void __exit tgfx_exit(void)
 311 {
 312         int i;
 313
 314         for (i = 0; i < TGFX_MAX_PORTS; i++)
 315                 if (tgfx_base[i])
 316                         tgfx_remove(tgfx_base[i]);
 317 }
 318
 319 module_init(tgfx_init);
 320 module_exit(tgfx_exit);