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[2] = { 0, 0 }; 55 static struct input_dev amijoy_dev[2]; 56 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" }; 57 58 static char *amijoy_name = "Amiga joystick"; 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 = ~custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break; 69 case 1: data = ~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 *used = dev->private; 88 89 if ((*used)++) 90 return 0; 91 92 if (request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) { 93 (*used)--; 94 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); 95 return -EBUSY; 96 } 97 98 return 0; 99 } 100 101 static void amijoy_close(struct input_dev *dev) 102 { 103 int *used = dev->private; 104 105 if (!--(*used)) 106 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt); 107 } 108 109 static int __init amijoy_init(void) 110 { 111 int i, j; 112 113 for (i = 0; i < 2; i++) 114 if (amijoy[i]) { 115 if (!request_mem_region(CUSTOM_PHYSADDR+10+i*2, 2, 116 "amijoy [Denise]")) { 117 if (i == 1 && amijoy[0]) { 118 input_unregister_device(amijoy_dev); 119 release_mem_region(CUSTOM_PHYSADDR+10, 2); 120 } 121 return -EBUSY; 122 } 123 124 amijoy_dev[i].open = amijoy_open; 125 amijoy_dev[i].close = amijoy_close; 126 amijoy_dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 127 amijoy_dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y); 128 amijoy_dev[i].keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 129 for (j = 0; j < 2; j++) { 130 amijoy_dev[i].absmin[ABS_X + j] = -1; 131 amijoy_dev[i].absmax[ABS_X + j] = 1; 132 } 133 134 amijoy_dev[i].name = amijoy_name; 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].private = amijoy_used + i; 142 143 input_register_device(amijoy_dev + i); 144 printk(KERN_INFO "input: %s at joy%ddat\n", amijoy_name, i); 145 } 146 return 0; 147 } 148 149 static void __exit amijoy_exit(void) 150 { 151 int i; 152 153 for (i = 0; i < 2; i++) 154 if (amijoy[i]) { 155 input_unregister_device(amijoy_dev + i); 156 release_mem_region(CUSTOM_PHYSADDR+10+i*2, 2); 157 } 158 } 159 160 module_init(amijoy_init); 161 module_exit(amijoy_exit); 162