drivers/input/joystick/amijoy.c

   1 /*
   2  * $Id: amijoy.c,v 1.13 2002/01/22 20:26:32 vojtech Exp $
   3  *
   4  *  Copyright (c) 1998-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * Driver for Amiga joysticks for Linux/m68k
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  * Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/types.h>
  32 #include <linux/errno.h>
  33 #include <linux/kernel.h>
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/init.h>
  37 #include <linux/input.h>
  38 #include <linux/interrupt.h>
  39
  40 #include <asm/system.h>
  41 #include <asm/amigahw.h>
  42 #include <asm/amigaints.h>
  43
  44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  45 MODULE_DESCRIPTION("Driver for Amiga joysticks");
  46 MODULE_LICENSE("GPL");
  47
  48 static int amijoy[2] = { 0, 1 };
  49 module_param_array_named(map, amijoy, uint, NULL, 0);
  50 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
  51
  52 __obsolete_setup("amijoy=");
  53
  54 static int amijoy_used;
  55 static DECLARE_MUTEX(amijoy_sem);
  56 static struct input_dev *amijoy_dev[2];
  57 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
  58
  59 static irqreturn_t amijoy_interrupt(int irq, void *dummy, struct pt_regs *fp)
  60 {
  61         int i, data = 0, button = 0;
  62
  63         for (i = 0; i < 2; i++)
  64                 if (amijoy[i]) {
  65
  66                         switch (i) {
  67                                 case 0: data = ~custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
  68                                 case 1: data = ~custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
  69                         }
  70
  71                         input_regs(amijoy_dev[i], fp);
  72
  73                         input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
  74
  75                         input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
  76                         data = ~(data ^ (data << 1));
  77                         input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
  78
  79                         input_sync(amijoy_dev[i]);
  80                 }
  81         return IRQ_HANDLED;
  82 }
  83
  84 static int amijoy_open(struct input_dev *dev)
  85 {
  86         int err;
  87
  88         err = down_interruptible(&amijoy_sem);
  89         if (err)
  90                 return err;
  91
  92         if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
  93                 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
  94                 err = -EBUSY;
  95                 goto out;
  96         }
  97
  98         amijoy_used++;
  99 out:
 100         up(&amijoy_sem);
 101         return err;
 102 }
 103
 104 static void amijoy_close(struct input_dev *dev)
 105 {
 106         down(&amijoy_sem);
 107         if (!--amijoy_used)
 108                 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
 109         up(&amijoy_sem);
 110 }
 111
 112 static int __init amijoy_init(void)
 113 {
 114         int i, j;
 115         int err;
 116
 117         for (i = 0; i < 2; i++) {
 118                 if (!amijoy[i])
 119                         continue;
 120
 121                 amijoy_dev[i] = input_allocate_device();
 122                 if (!amijoy_dev[i]) {
 123                         err = -ENOMEM;
 124                         goto fail;
 125                 }
 126
 127                 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
 128                         input_free_device(amijoy_dev[i]);
 129                         err = -EBUSY;
 130                         goto fail;
 131                 }
 132
 133                 amijoy_dev[i]->name = "Amiga joystick";
 134                 amijoy_dev[i]->phys = amijoy_phys[i];
 135                 amijoy_dev[i]->id.bustype = BUS_AMIGA;
 136                 amijoy_dev[i]->id.vendor = 0x0001;
 137                 amijoy_dev[i]->id.product = 0x0003;
 138                 amijoy_dev[i]->id.version = 0x0100;
 139
 140                 amijoy_dev[i]->open = amijoy_open;
 141                 amijoy_dev[i]->close = amijoy_close;
 142
 143                 amijoy_dev[i]->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 144                 amijoy_dev[i]->absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
 145                 amijoy_dev[i]->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 146                 for (j = 0; j < 2; j++) {
 147                         amijoy_dev[i]->absmin[ABS_X + j] = -1;
 148                         amijoy_dev[i]->absmax[ABS_X + j] = 1;
 149                 }
 150
 151                 input_register_device(amijoy_dev[i]);
 152         }
 153         return 0;
 154
 155  fail:  while (--i >= 0)
 156                 if (amijoy[i]) {
 157                         input_unregister_device(amijoy_dev[i]);
 158                         release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
 159                 }
 160         return err;
 161 }
 162
 163 static void __exit amijoy_exit(void)
 164 {
 165         int i;
 166
 167         for (i = 0; i < 2; i++)
 168                 if (amijoy[i]) {
 169                         input_unregister_device(amijoy_dev[i]);
 170                         release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
 171                 }
 172 }
 173
 174 module_init(amijoy_init);
 175 module_exit(amijoy_exit);