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); 177