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 static int tgfx[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
  46 static int tgfx_nargs __initdata = 0;
  47 module_param_array_named(map, tgfx, int, &tgfx_nargs, 0);
  48 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
  49
  50 static int tgfx_2[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
  51 static int tgfx_nargs_2 __initdata = 0;
  52 module_param_array_named(map2, tgfx_2, int, &tgfx_nargs_2, 0);
  53 MODULE_PARM_DESC(map2, "Describes second set of devices");
  54
  55 static int tgfx_3[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
  56 static int tgfx_nargs_3 __initdata = 0;
  57 module_param_array_named(map3, tgfx_3, int, &tgfx_nargs_3, 0);
  58 MODULE_PARM_DESC(map3, "Describes third set of devices");
  59
  60 __obsolete_setup("tgfx=");
  61 __obsolete_setup("tgfx_2=");
  62 __obsolete_setup("tgfx_3=");
  63
  64 #define TGFX_REFRESH_TIME       HZ/100  /* 10 ms */
  65
  66 #define TGFX_TRIGGER            0x08
  67 #define TGFX_UP                 0x10
  68 #define TGFX_DOWN               0x20
  69 #define TGFX_LEFT               0x40
  70 #define TGFX_RIGHT              0x80
  71
  72 #define TGFX_THUMB              0x02
  73 #define TGFX_THUMB2             0x04
  74 #define TGFX_TOP                0x01
  75 #define TGFX_TOP2               0x08
  76
  77 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
  78 static char *tgfx_name = "TurboGraFX Multisystem joystick";
  79
  80 static struct tgfx {
  81         struct pardevice *pd;
  82         struct timer_list timer;
  83         struct input_dev dev[7];
  84         char phys[7][32];
  85         int sticks;
  86         int used;
  87 } *tgfx_base[3];
  88
  89 /*
  90  * tgfx_timer() reads and analyzes TurboGraFX joystick data.
  91  */
  92
  93 static 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;    /* CAVEAT parport */
 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
 123 static int tgfx_open(struct input_dev *dev)
 124 {
 125         struct tgfx *tgfx = dev->private;
 126         if (!tgfx->used++) {
 127                 parport_claim(tgfx->pd);
 128                 parport_write_control(tgfx->pd->port, 0x04);
 129                 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
 130         }
 131         return 0;
 132 }
 133
 134 static void tgfx_close(struct input_dev *dev)
 135 {
 136         struct tgfx *tgfx = dev->private;
 137         if (!--tgfx->used) {
 138                 del_timer(&tgfx->timer);
 139                 parport_write_control(tgfx->pd->port, 0x00);
 140                 parport_release(tgfx->pd);
 141         }
 142 }
 143
 144 /*
 145  * tgfx_probe() probes for tg gamepads.
 146  */
 147
 148 static struct tgfx __init *tgfx_probe(int *config, int nargs)
 149 {
 150         struct tgfx *tgfx;
 151         struct parport *pp;
 152         int i, j;
 153
 154         if (config[0] < 0)
 155                 return NULL;
 156
 157         if (nargs < 2) {
 158                 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
 159                 return NULL;
 160         }
 161
 162         pp = parport_find_number(config[0]);
 163
 164         if (!pp) {
 165                 printk(KERN_ERR "turbografx.c: no such parport\n");
 166                 return NULL;
 167         }
 168
 169         if (!(tgfx = kmalloc(sizeof(struct tgfx), GFP_KERNEL))) {
 170                 parport_put_port(pp);
 171                 return NULL;
 172         }
 173         memset(tgfx, 0, sizeof(struct tgfx));
 174
 175         tgfx->pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
 176
 177         parport_put_port(pp);
 178
 179         if (!tgfx->pd) {
 180                 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
 181                 kfree(tgfx);
 182                 return NULL;
 183         }
 184
 185         init_timer(&tgfx->timer);
 186         tgfx->timer.data = (long) tgfx;
 187         tgfx->timer.function = tgfx_timer;
 188
 189         tgfx->sticks = 0;
 190
 191         for (i = 0; i < nargs - 1; i++)
 192                 if (config[i+1] > 0 && config[i+1] < 6) {
 193
 194                         tgfx->sticks |= (1 << i);
 195
 196                         tgfx->dev[i].private = tgfx;
 197                         tgfx->dev[i].open = tgfx_open;
 198                         tgfx->dev[i].close = tgfx_close;
 199
 200                         sprintf(tgfx->phys[i], "%s/input0", tgfx->pd->port->name);
 201
 202                         tgfx->dev[i].name = tgfx_name;
 203                         tgfx->dev[i].phys = tgfx->phys[i];
 204                         tgfx->dev[i].id.bustype = BUS_PARPORT;
 205                         tgfx->dev[i].id.vendor = 0x0003;
 206                         tgfx->dev[i].id.product = config[i+1];
 207                         tgfx->dev[i].id.version = 0x0100;
 208
 209                         tgfx->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 210                         tgfx->dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
 211
 212                         for (j = 0; j < config[i+1]; j++)
 213                                 set_bit(tgfx_buttons[j], tgfx->dev[i].keybit);
 214
 215                         tgfx->dev[i].absmin[ABS_X] = -1; tgfx->dev[i].absmax[ABS_X] = 1;
 216                         tgfx->dev[i].absmin[ABS_Y] = -1; tgfx->dev[i].absmax[ABS_Y] = 1;
 217
 218                         input_register_device(tgfx->dev + i);
 219                         printk(KERN_INFO "input: %d-button Multisystem joystick on %s\n",
 220                                 config[i+1], tgfx->pd->port->name);
 221                 }
 222
 223         if (!tgfx->sticks) {
 224                 parport_unregister_device(tgfx->pd);
 225                 kfree(tgfx);
 226                 return NULL;
 227         }
 228
 229         return tgfx;
 230 }
 231
 232 static int __init tgfx_init(void)
 233 {
 234         tgfx_base[0] = tgfx_probe(tgfx, tgfx_nargs);
 235         tgfx_base[1] = tgfx_probe(tgfx_2, tgfx_nargs_2);
 236         tgfx_base[2] = tgfx_probe(tgfx_3, tgfx_nargs_3);
 237
 238         if (tgfx_base[0] || tgfx_base[1] || tgfx_base[2])
 239                 return 0;
 240
 241         return -ENODEV;
 242 }
 243
 244 static void __exit tgfx_exit(void)
 245 {
 246         int i, j;
 247
 248         for (i = 0; i < 3; i++)
 249                 if (tgfx_base[i]) {
 250                         for (j = 0; j < 7; j++)
 251                                 if (tgfx_base[i]->sticks & (1 << j))
 252                                         input_unregister_device(tgfx_base[i]->dev + j);
 253                 parport_unregister_device(tgfx_base[i]->pd);
 254         }
 255 }
 256
 257 module_init(tgfx_init);
 258 module_exit(tgfx_exit);