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