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