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