1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 1998-2001 Vojtech Pavlik 4 */ 5 6 /* 7 * Driver for Amiga joysticks for Linux/m68k 8 */ 9 10 /* 11 */ 12 13 #include <linux/types.h> 14 #include <linux/errno.h> 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/init.h> 18 #include <linux/input.h> 19 #include <linux/interrupt.h> 20 #include <linux/mutex.h> 21 22 #include <asm/amigahw.h> 23 #include <asm/amigaints.h> 24 25 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 26 MODULE_DESCRIPTION("Driver for Amiga joysticks"); 27 MODULE_LICENSE("GPL"); 28 29 static int amijoy[2] = { 0, 1 }; 30 module_param_array_named(map, amijoy, uint, NULL, 0); 31 MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)"); 32 33 static int amijoy_used; 34 static DEFINE_MUTEX(amijoy_mutex); 35 static struct input_dev *amijoy_dev[2]; 36 static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" }; 37 38 static irqreturn_t amijoy_interrupt(int irq, void *dummy) 39 { 40 int i, data = 0, button = 0; 41 42 for (i = 0; i < 2; i++) 43 if (amijoy[i]) { 44 45 switch (i) { 46 case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break; 47 case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break; 48 } 49 50 input_report_key(amijoy_dev[i], BTN_TRIGGER, button); 51 52 input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1)); 53 data = ~(data ^ (data << 1)); 54 input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1)); 55 56 input_sync(amijoy_dev[i]); 57 } 58 return IRQ_HANDLED; 59 } 60 61 static int amijoy_open(struct input_dev *dev) 62 { 63 int err; 64 65 err = mutex_lock_interruptible(&amijoy_mutex); 66 if (err) 67 return err; 68 69 if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) { 70 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); 71 err = -EBUSY; 72 goto out; 73 } 74 75 amijoy_used++; 76 out: 77 mutex_unlock(&amijoy_mutex); 78 return err; 79 } 80 81 static void amijoy_close(struct input_dev *dev) 82 { 83 mutex_lock(&amijoy_mutex); 84 if (!--amijoy_used) 85 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt); 86 mutex_unlock(&amijoy_mutex); 87 } 88 89 static int __init amijoy_init(void) 90 { 91 int i, j; 92 int err; 93 94 if (!MACH_IS_AMIGA) 95 return -ENODEV; 96 97 for (i = 0; i < 2; i++) { 98 if (!amijoy[i]) 99 continue; 100 101 amijoy_dev[i] = input_allocate_device(); 102 if (!amijoy_dev[i]) { 103 err = -ENOMEM; 104 goto fail; 105 } 106 107 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) { 108 input_free_device(amijoy_dev[i]); 109 err = -EBUSY; 110 goto fail; 111 } 112 113 amijoy_dev[i]->name = "Amiga joystick"; 114 amijoy_dev[i]->phys = amijoy_phys[i]; 115 amijoy_dev[i]->id.bustype = BUS_AMIGA; 116 amijoy_dev[i]->id.vendor = 0x0001; 117 amijoy_dev[i]->id.product = 0x0003; 118 amijoy_dev[i]->id.version = 0x0100; 119 120 amijoy_dev[i]->open = amijoy_open; 121 amijoy_dev[i]->close = amijoy_close; 122 123 amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 124 amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y); 125 amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | 126 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 127 for (j = 0; j < 2; j++) { 128 input_set_abs_params(amijoy_dev[i], ABS_X + j, 129 -1, 1, 0, 0); 130 } 131 132 err = input_register_device(amijoy_dev[i]); 133 if (err) { 134 input_free_device(amijoy_dev[i]); 135 goto fail; 136 } 137 } 138 return 0; 139 140 fail: while (--i >= 0) 141 if (amijoy[i]) { 142 input_unregister_device(amijoy_dev[i]); 143 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2); 144 } 145 return err; 146 } 147 148 static void __exit amijoy_exit(void) 149 { 150 int i; 151 152 for (i = 0; i < 2; i++) 153 if (amijoy[i]) { 154 input_unregister_device(amijoy_dev[i]); 155 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2); 156 } 157 } 158 159 module_init(amijoy_init); 160 module_exit(amijoy_exit); 161