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/init.h>
  39 #include <linux/mutex.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         unsigned int nargs;
  51 };
  52
  53 static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS] __initdata;
  54
  55 module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
  56 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
  57 module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
  58 MODULE_PARM_DESC(map2, "Describes second set of devices");
  59 module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
  60 MODULE_PARM_DESC(map3, "Describes third set of devices");
  61
  62 #define TGFX_REFRESH_TIME       HZ/100  /* 10 ms */
  63
  64 #define TGFX_TRIGGER            0x08
  65 #define TGFX_UP                 0x10
  66 #define TGFX_DOWN               0x20
  67 #define TGFX_LEFT               0x40
  68 #define TGFX_RIGHT              0x80
  69
  70 #define TGFX_THUMB              0x02
  71 #define TGFX_THUMB2             0x04
  72 #define TGFX_TOP                0x01
  73 #define TGFX_TOP2               0x08
  74
  75 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
  76
  77 static struct tgfx {
  78         struct pardevice *pd;
  79         struct timer_list timer;
  80         struct input_dev *dev[TGFX_MAX_DEVICES];
  81         char name[TGFX_MAX_DEVICES][64];
  82         char phys[TGFX_MAX_DEVICES][32];
  83         int sticks;
  84         int used;
  85         struct mutex sem;
  86 } *tgfx_base[TGFX_MAX_PORTS];
  87
  88 /*
  89  * tgfx_timer() reads and analyzes TurboGraFX joystick data.
  90  */
  91
  92 static 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;    /* CAVEAT parport */
 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
 122 static 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
 141 static 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  * tgfx_probe() probes for tg gamepads.
 158  */
 159
 160 static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs)
 161 {
 162         struct tgfx *tgfx;
 163         struct input_dev *input_dev;
 164         struct parport *pp;
 165         struct pardevice *pd;
 166         int i, j;
 167         int err;
 168
 169         pp = parport_find_number(parport);
 170         if (!pp) {
 171                 printk(KERN_ERR "turbografx.c: no such parport\n");
 172                 err = -EINVAL;
 173                 goto err_out;
 174         }
 175
 176         pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
 177         if (!pd) {
 178                 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
 179                 err = -EBUSY;
 180                 goto err_put_pp;
 181         }
 182
 183         tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
 184         if (!tgfx) {
 185                 printk(KERN_ERR "turbografx.c: Not enough memory\n");
 186                 err = -ENOMEM;
 187                 goto err_unreg_pardev;
 188         }
 189
 190         mutex_init(&tgfx->sem);
 191         tgfx->pd = pd;
 192         init_timer(&tgfx->timer);
 193         tgfx->timer.data = (long) tgfx;
 194         tgfx->timer.function = tgfx_timer;
 195
 196         for (i = 0; i < n_devs; i++) {
 197                 if (n_buttons[i] < 1)
 198                         continue;
 199
 200                 if (n_buttons[i] > 6) {
 201                         printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
 202                         err = -EINVAL;
 203                         goto err_unreg_devs;
 204                 }
 205
 206                 tgfx->dev[i] = input_dev = input_allocate_device();
 207                 if (!input_dev) {
 208                         printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
 209                         err = -ENOMEM;
 210                         goto err_unreg_devs;
 211                 }
 212
 213                 tgfx->sticks |= (1 << i);
 214                 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
 215                          "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
 216                 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
 217                          "%s/input%d", tgfx->pd->port->name, i);
 218
 219                 input_dev->name = tgfx->name[i];
 220                 input_dev->phys = tgfx->phys[i];
 221                 input_dev->id.bustype = BUS_PARPORT;
 222                 input_dev->id.vendor = 0x0003;
 223                 input_dev->id.product = n_buttons[i];
 224                 input_dev->id.version = 0x0100;
 225
 226                 input_set_drvdata(input_dev, tgfx);
 227
 228                 input_dev->open = tgfx_open;
 229                 input_dev->close = tgfx_close;
 230
 231                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 232                 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
 233                 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
 234
 235                 for (j = 0; j < n_buttons[i]; j++)
 236                         set_bit(tgfx_buttons[j], input_dev->keybit);
 237
 238                 err = input_register_device(tgfx->dev[i]);
 239                 if (err)
 240                         goto err_free_dev;
 241         }
 242
 243         if (!tgfx->sticks) {
 244                 printk(KERN_ERR "turbografx.c: No valid devices specified\n");
 245                 err = -EINVAL;
 246                 goto err_free_tgfx;
 247         }
 248
 249         return tgfx;
 250
 251  err_free_dev:
 252         input_free_device(tgfx->dev[i]);
 253  err_unreg_devs:
 254         while (--i >= 0)
 255                 if (tgfx->dev[i])
 256                         input_unregister_device(tgfx->dev[i]);
 257  err_free_tgfx:
 258         kfree(tgfx);
 259  err_unreg_pardev:
 260         parport_unregister_device(pd);
 261  err_put_pp:
 262         parport_put_port(pp);
 263  err_out:
 264         return ERR_PTR(err);
 265 }
 266
 267 static void tgfx_remove(struct tgfx *tgfx)
 268 {
 269         int i;
 270
 271         for (i = 0; i < TGFX_MAX_DEVICES; i++)
 272                 if (tgfx->dev[i])
 273                         input_unregister_device(tgfx->dev[i]);
 274         parport_unregister_device(tgfx->pd);
 275         kfree(tgfx);
 276 }
 277
 278 static int __init tgfx_init(void)
 279 {
 280         int i;
 281         int have_dev = 0;
 282         int err = 0;
 283
 284         for (i = 0; i < TGFX_MAX_PORTS; i++) {
 285                 if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
 286                         continue;
 287
 288                 if (tgfx_cfg[i].nargs < 2) {
 289                         printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
 290                         err = -EINVAL;
 291                         break;
 292                 }
 293
 294                 tgfx_base[i] = tgfx_probe(tgfx_cfg[i].args[0],
 295                                           tgfx_cfg[i].args + 1,
 296                                           tgfx_cfg[i].nargs - 1);
 297                 if (IS_ERR(tgfx_base[i])) {
 298                         err = PTR_ERR(tgfx_base[i]);
 299                         break;
 300                 }
 301
 302                 have_dev = 1;
 303         }
 304
 305         if (err) {
 306                 while (--i >= 0)
 307                         if (tgfx_base[i])
 308                                 tgfx_remove(tgfx_base[i]);
 309                 return err;
 310         }
 311
 312         return have_dev ? 0 : -ENODEV;
 313 }
 314
 315 static void __exit tgfx_exit(void)
 316 {
 317         int i;
 318
 319         for (i = 0; i < TGFX_MAX_PORTS; i++)
 320                 if (tgfx_base[i])
 321                         tgfx_remove(tgfx_base[i]);
 322 }
 323
 324 module_init(tgfx_init);
 325 module_exit(tgfx_exit);