drivers/input/joystick/amijoy.c

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