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 irqreturn_t amijoy_interrupt(int irq, void *dummy, struct pt_regs *fp) 60 { 61 int i, data = 0, button = 0; 62 63 for (i = 0; i < 2; i++) 64 if (amijoy[i]) { 65 66 switch (i) { 67 case 0: data = ~custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break; 68 case 1: data = ~custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break; 69 } 70 71 input_regs(amijoy_dev[i], fp); 72 73 input_report_key(amijoy_dev[i], BTN_TRIGGER, button); 74 75 input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1)); 76 data = ~(data ^ (data << 1)); 77 input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1)); 78 79 input_sync(amijoy_dev[i]); 80 } 81 return IRQ_HANDLED; 82 } 83 84 static int amijoy_open(struct input_dev *dev) 85 { 86 int err; 87 88 err = down_interruptible(&amijoy_sem); 89 if (err) 90 return err; 91 92 if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) { 93 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); 94 err = -EBUSY; 95 goto out; 96 } 97 98 amijoy_used++; 99 out: 100 up(&amijoy_sem); 101 return err; 102 } 103 104 static void amijoy_close(struct input_dev *dev) 105 { 106 down(&amijoy_sem); 107 if (!--amijoy_used) 108 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt); 109 up(&amijoy_sem); 110 } 111 112 static int __init amijoy_init(void) 113 { 114 int i, j; 115 int err; 116 117 for (i = 0; i < 2; i++) { 118 if (!amijoy[i]) 119 continue; 120 121 amijoy_dev[i] = input_allocate_device(); 122 if (!amijoy_dev[i]) { 123 err = -ENOMEM; 124 goto fail; 125 } 126 127 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) { 128 input_free_device(amijoy_dev[i]); 129 err = -EBUSY; 130 goto fail; 131 } 132 133 amijoy_dev[i]->name = "Amiga joystick"; 134 amijoy_dev[i]->phys = amijoy_phys[i]; 135 amijoy_dev[i]->id.bustype = BUS_AMIGA; 136 amijoy_dev[i]->id.vendor = 0x0001; 137 amijoy_dev[i]->id.product = 0x0003; 138 amijoy_dev[i]->id.version = 0x0100; 139 140 amijoy_dev[i]->open = amijoy_open; 141 amijoy_dev[i]->close = amijoy_close; 142 143 amijoy_dev[i]->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 144 amijoy_dev[i]->absbit[0] = BIT(ABS_X) | BIT(ABS_Y); 145 amijoy_dev[i]->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 146 for (j = 0; j < 2; j++) { 147 amijoy_dev[i]->absmin[ABS_X + j] = -1; 148 amijoy_dev[i]->absmax[ABS_X + j] = 1; 149 } 150 151 input_register_device(amijoy_dev[i]); 152 } 153 return 0; 154 155 fail: while (--i >= 0) 156 if (amijoy[i]) { 157 input_unregister_device(amijoy_dev[i]); 158 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2); 159 } 160 return err; 161 } 162 163 static void __exit amijoy_exit(void) 164 { 165 int i; 166 167 for (i = 0; i < 2; i++) 168 if (amijoy[i]) { 169 input_unregister_device(amijoy_dev[i]); 170 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2); 171 } 172 } 173 174 module_init(amijoy_init); 175 module_exit(amijoy_exit); 176