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(EV_KEY) | BIT(EV_ABS); 141 amijoy_dev[i]->absbit[0] = BIT(ABS_X) | BIT(ABS_Y); 142 amijoy_dev[i]->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 143 for (j = 0; j < 2; j++) { 144 amijoy_dev[i]->absmin[ABS_X + j] = -1; 145 amijoy_dev[i]->absmax[ABS_X + j] = 1; 146 } 147 148 err = input_register_device(amijoy_dev[i]); 149 if (err) { 150 input_free_device(amijoy_dev[i]); 151 goto fail; 152 } 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); 177