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 #include <linux/mutex.h>
  40
  41 #include <asm/system.h>
  42 #include <asm/amigahw.h>
  43 #include <asm/amigaints.h>
  44
  45 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  46 MODULE_DESCRIPTION("Driver for Amiga joysticks");
  47 MODULE_LICENSE("GPL");
  48
  49 static int amijoy[2] = { 0, 1 };
  50 module_param_array_named(map, amijoy, uint, NULL, 0);
  51 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
  52
  53 static int amijoy_used;
  54 static DEFINE_MUTEX(amijoy_mutex);
  55 static struct input_dev *amijoy_dev[2];
  56 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
  57
  58 static irqreturn_t amijoy_interrupt(int irq, void *dummy)
  59 {
  60         int i, data = 0, button = 0;
  61
  62         for (i = 0; i < 2; i++)
  63                 if (amijoy[i]) {
  64
  65                         switch (i) {
  66                                 case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
  67                                 case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
  68                         }
  69
  70                         input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
  71
  72                         input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
  73                         data = ~(data ^ (data << 1));
  74                         input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
  75
  76                         input_sync(amijoy_dev[i]);
  77                 }
  78         return IRQ_HANDLED;
  79 }
  80
  81 static int amijoy_open(struct input_dev *dev)
  82 {
  83         int err;
  84
  85         err = mutex_lock_interruptible(&amijoy_mutex);
  86         if (err)
  87                 return err;
  88
  89         if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
  90                 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
  91                 err = -EBUSY;
  92                 goto out;
  93         }
  94
  95         amijoy_used++;
  96 out:
  97         mutex_unlock(&amijoy_mutex);
  98         return err;
  99 }
 100
 101 static void amijoy_close(struct input_dev *dev)
 102 {
 103         mutex_lock(&amijoy_mutex);
 104         if (!--amijoy_used)
 105                 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
 106         mutex_unlock(&amijoy_mutex);
 107 }
 108
 109 static int __init amijoy_init(void)
 110 {
 111         int i, j;
 112         int err;
 113
 114         for (i = 0; i < 2; i++) {
 115                 if (!amijoy[i])
 116                         continue;
 117
 118                 amijoy_dev[i] = input_allocate_device();
 119                 if (!amijoy_dev[i]) {
 120                         err = -ENOMEM;
 121                         goto fail;
 122                 }
 123
 124                 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
 125                         input_free_device(amijoy_dev[i]);
 126                         err = -EBUSY;
 127                         goto fail;
 128                 }
 129
 130                 amijoy_dev[i]->name = "Amiga joystick";
 131                 amijoy_dev[i]->phys = amijoy_phys[i];
 132                 amijoy_dev[i]->id.bustype = BUS_AMIGA;
 133                 amijoy_dev[i]->id.vendor = 0x0001;
 134                 amijoy_dev[i]->id.product = 0x0003;
 135                 amijoy_dev[i]->id.version = 0x0100;
 136
 137                 amijoy_dev[i]->open = amijoy_open;
 138                 amijoy_dev[i]->close = amijoy_close;
 139
 140                 amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 141                 amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
 142                 amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 143                         BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 144                 for (j = 0; j < 2; j++) {
 145                         amijoy_dev[i]->absmin[ABS_X + j] = -1;
 146                         amijoy_dev[i]->absmax[ABS_X + j] = 1;
 147                 }
 148
 149                 err = input_register_device(amijoy_dev[i]);
 150                 if (err) {
 151                         input_free_device(amijoy_dev[i]);
 152                         goto fail;
 153                 }
 154         }
 155         return 0;
 156
 157  fail:  while (--i >= 0)
 158                 if (amijoy[i]) {
 159                         input_unregister_device(amijoy_dev[i]);
 160                         release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
 161                 }
 162         return err;
 163 }
 164
 165 static void __exit amijoy_exit(void)
 166 {
 167         int i;
 168
 169         for (i = 0; i < 2; i++)
 170                 if (amijoy[i]) {
 171                         input_unregister_device(amijoy_dev[i]);
 172                         release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
 173                 }
 174 }
 175
 176 module_init(amijoy_init);
 177 module_exit(amijoy_exit);