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
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/input.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/mutex.h>
  33
  34 #include <asm/amigahw.h>
  35 #include <asm/amigaints.h>
  36
  37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  38 MODULE_DESCRIPTION("Driver for Amiga joysticks");
  39 MODULE_LICENSE("GPL");
  40
  41 static int amijoy[2] = { 0, 1 };
  42 module_param_array_named(map, amijoy, uint, NULL, 0);
  43 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
  44
  45 static int amijoy_used;
  46 static DEFINE_MUTEX(amijoy_mutex);
  47 static struct input_dev *amijoy_dev[2];
  48 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
  49
  50 static irqreturn_t amijoy_interrupt(int irq, void *dummy)
  51 {
  52         int i, data = 0, button = 0;
  53
  54         for (i = 0; i < 2; i++)
  55                 if (amijoy[i]) {
  56
  57                         switch (i) {
  58                                 case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
  59                                 case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
  60                         }
  61
  62                         input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
  63
  64                         input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
  65                         data = ~(data ^ (data << 1));
  66                         input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
  67
  68                         input_sync(amijoy_dev[i]);
  69                 }
  70         return IRQ_HANDLED;
  71 }
  72
  73 static int amijoy_open(struct input_dev *dev)
  74 {
  75         int err;
  76
  77         err = mutex_lock_interruptible(&amijoy_mutex);
  78         if (err)
  79                 return err;
  80
  81         if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
  82                 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
  83                 err = -EBUSY;
  84                 goto out;
  85         }
  86
  87         amijoy_used++;
  88 out:
  89         mutex_unlock(&amijoy_mutex);
  90         return err;
  91 }
  92
  93 static void amijoy_close(struct input_dev *dev)
  94 {
  95         mutex_lock(&amijoy_mutex);
  96         if (!--amijoy_used)
  97                 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
  98         mutex_unlock(&amijoy_mutex);
  99 }
 100
 101 static int __init amijoy_init(void)
 102 {
 103         int i, j;
 104         int err;
 105
 106         if (!MACH_IS_AMIGA)
 107                 return -ENODEV;
 108
 109         for (i = 0; i < 2; i++) {
 110                 if (!amijoy[i])
 111                         continue;
 112
 113                 amijoy_dev[i] = input_allocate_device();
 114                 if (!amijoy_dev[i]) {
 115                         err = -ENOMEM;
 116                         goto fail;
 117                 }
 118
 119                 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
 120                         input_free_device(amijoy_dev[i]);
 121                         err = -EBUSY;
 122                         goto fail;
 123                 }
 124
 125                 amijoy_dev[i]->name = "Amiga joystick";
 126                 amijoy_dev[i]->phys = amijoy_phys[i];
 127                 amijoy_dev[i]->id.bustype = BUS_AMIGA;
 128                 amijoy_dev[i]->id.vendor = 0x0001;
 129                 amijoy_dev[i]->id.product = 0x0003;
 130                 amijoy_dev[i]->id.version = 0x0100;
 131
 132                 amijoy_dev[i]->open = amijoy_open;
 133                 amijoy_dev[i]->close = amijoy_close;
 134
 135                 amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 136                 amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
 137                 amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
 138                         BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 139                 for (j = 0; j < 2; j++) {
 140                         input_set_abs_params(amijoy_dev[i], ABS_X + j,
 141                                              -1, 1, 0, 0);
 142                 }
 143
 144                 err = input_register_device(amijoy_dev[i]);
 145                 if (err) {
 146                         input_free_device(amijoy_dev[i]);
 147                         goto fail;
 148                 }
 149         }
 150         return 0;
 151
 152  fail:  while (--i >= 0)
 153                 if (amijoy[i]) {
 154                         input_unregister_device(amijoy_dev[i]);
 155                         release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
 156                 }
 157         return err;
 158 }
 159
 160 static void __exit amijoy_exit(void)
 161 {
 162         int i;
 163
 164         for (i = 0; i < 2; i++)
 165                 if (amijoy[i]) {
 166                         input_unregister_device(amijoy_dev[i]);
 167                         release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
 168                 }
 169 }
 170
 171 module_init(amijoy_init);
 172 module_exit(amijoy_exit);