1 /* 2 * Copyright (c) 1998-2001 Vojtech Pavlik 3 */ 4 5 /* 6 * Driver for Amiga joysticks for Linux/m68k 7 */ 8 9 /* 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 */ 24 25 #include <linux/types.h> 26 #include <linux/errno.h> 27 #include <linux/kernel.h> 28 #include <linux/module.h> 29 #include <linux/init.h> 30 #include <linux/input.h> 31 #include <linux/interrupt.h> 32 #include <linux/mutex.h> 33 34 #include <asm/amigahw.h> 35 #include <asm/amigaints.h> 36 37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 38 MODULE_DESCRIPTION("Driver for Amiga joysticks"); 39 MODULE_LICENSE("GPL"); 40 41 static int amijoy[2] = { 0, 1 }; 42 module_param_array_named(map, amijoy, uint, NULL, 0); 43 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)"); 44 45 static int amijoy_used; 46 static DEFINE_MUTEX(amijoy_mutex); 47 static struct input_dev *amijoy_dev[2]; 48 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" }; 49 50 static irqreturn_t amijoy_interrupt(int irq, void *dummy) 51 { 52 int i, data = 0, button = 0; 53 54 for (i = 0; i < 2; i++) 55 if (amijoy[i]) { 56 57 switch (i) { 58 case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break; 59 case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break; 60 } 61 62 input_report_key(amijoy_dev[i], BTN_TRIGGER, button); 63 64 input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1)); 65 data = ~(data ^ (data << 1)); 66 input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1)); 67 68 input_sync(amijoy_dev[i]); 69 } 70 return IRQ_HANDLED; 71 } 72 73 static int amijoy_open(struct input_dev *dev) 74 { 75 int err; 76 77 err = mutex_lock_interruptible(&amijoy_mutex); 78 if (err) 79 return err; 80 81 if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) { 82 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); 83 err = -EBUSY; 84 goto out; 85 } 86 87 amijoy_used++; 88 out: 89 mutex_unlock(&amijoy_mutex); 90 return err; 91 } 92 93 static void amijoy_close(struct input_dev *dev) 94 { 95 mutex_lock(&amijoy_mutex); 96 if (!--amijoy_used) 97 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt); 98 mutex_unlock(&amijoy_mutex); 99 } 100 101 static int __init amijoy_init(void) 102 { 103 int i, j; 104 int err; 105 106 if (!MACH_IS_AMIGA) 107 return -ENODEV; 108 109 for (i = 0; i < 2; i++) { 110 if (!amijoy[i]) 111 continue; 112 113 amijoy_dev[i] = input_allocate_device(); 114 if (!amijoy_dev[i]) { 115 err = -ENOMEM; 116 goto fail; 117 } 118 119 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) { 120 input_free_device(amijoy_dev[i]); 121 err = -EBUSY; 122 goto fail; 123 } 124 125 amijoy_dev[i]->name = "Amiga joystick"; 126 amijoy_dev[i]->phys = amijoy_phys[i]; 127 amijoy_dev[i]->id.bustype = BUS_AMIGA; 128 amijoy_dev[i]->id.vendor = 0x0001; 129 amijoy_dev[i]->id.product = 0x0003; 130 amijoy_dev[i]->id.version = 0x0100; 131 132 amijoy_dev[i]->open = amijoy_open; 133 amijoy_dev[i]->close = amijoy_close; 134 135 amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 136 amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y); 137 amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | 138 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 139 for (j = 0; j < 2; j++) { 140 input_set_abs_params(amijoy_dev[i], ABS_X + j, 141 -1, 1, 0, 0); 142 } 143 144 err = input_register_device(amijoy_dev[i]); 145 if (err) { 146 input_free_device(amijoy_dev[i]); 147 goto fail; 148 } 149 } 150 return 0; 151 152 fail: while (--i >= 0) 153 if (amijoy[i]) { 154 input_unregister_device(amijoy_dev[i]); 155 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2); 156 } 157 return err; 158 } 159 160 static void __exit amijoy_exit(void) 161 { 162 int i; 163 164 for (i = 0; i < 2; i++) 165 if (amijoy[i]) { 166 input_unregister_device(amijoy_dev[i]); 167 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2); 168 } 169 } 170 171 module_init(amijoy_init); 172 module_exit(amijoy_exit); 173