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29#include <linux/types.h>
30#include <linux/errno.h>
31#include <linux/kernel.h>
32#include <linux/module.h>
33#include <linux/init.h>
34#include <linux/input.h>
35#include <linux/interrupt.h>
36#include <linux/mutex.h>
37
38#include <asm/system.h>
39#include <asm/amigahw.h>
40#include <asm/amigaints.h>
41
42MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43MODULE_DESCRIPTION("Driver for Amiga joysticks");
44MODULE_LICENSE("GPL");
45
46static int amijoy[2] = { 0, 1 };
47module_param_array_named(map, amijoy, uint, NULL, 0);
48MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
49
50static int amijoy_used;
51static DEFINE_MUTEX(amijoy_mutex);
52static struct input_dev *amijoy_dev[2];
53static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
54
55static irqreturn_t amijoy_interrupt(int irq, void *dummy)
56{
57 int i, data = 0, button = 0;
58
59 for (i = 0; i < 2; i++)
60 if (amijoy[i]) {
61
62 switch (i) {
63 case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
64 case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
65 }
66
67 input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
68
69 input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
70 data = ~(data ^ (data << 1));
71 input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
72
73 input_sync(amijoy_dev[i]);
74 }
75 return IRQ_HANDLED;
76}
77
78static int amijoy_open(struct input_dev *dev)
79{
80 int err;
81
82 err = mutex_lock_interruptible(&amijoy_mutex);
83 if (err)
84 return err;
85
86 if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
87 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
88 err = -EBUSY;
89 goto out;
90 }
91
92 amijoy_used++;
93out:
94 mutex_unlock(&amijoy_mutex);
95 return err;
96}
97
98static void amijoy_close(struct input_dev *dev)
99{
100 mutex_lock(&amijoy_mutex);
101 if (!--amijoy_used)
102 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
103 mutex_unlock(&amijoy_mutex);
104}
105
106static int __init amijoy_init(void)
107{
108 int i, j;
109 int err;
110
111 for (i = 0; i < 2; i++) {
112 if (!amijoy[i])
113 continue;
114
115 amijoy_dev[i] = input_allocate_device();
116 if (!amijoy_dev[i]) {
117 err = -ENOMEM;
118 goto fail;
119 }
120
121 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
122 input_free_device(amijoy_dev[i]);
123 err = -EBUSY;
124 goto fail;
125 }
126
127 amijoy_dev[i]->name = "Amiga joystick";
128 amijoy_dev[i]->phys = amijoy_phys[i];
129 amijoy_dev[i]->id.bustype = BUS_AMIGA;
130 amijoy_dev[i]->id.vendor = 0x0001;
131 amijoy_dev[i]->id.product = 0x0003;
132 amijoy_dev[i]->id.version = 0x0100;
133
134 amijoy_dev[i]->open = amijoy_open;
135 amijoy_dev[i]->close = amijoy_close;
136
137 amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
138 amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
139 amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
140 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
141 for (j = 0; j < 2; j++) {
142 amijoy_dev[i]->absmin[ABS_X + j] = -1;
143 amijoy_dev[i]->absmax[ABS_X + j] = 1;
144 }
145
146 err = input_register_device(amijoy_dev[i]);
147 if (err) {
148 input_free_device(amijoy_dev[i]);
149 goto fail;
150 }
151 }
152 return 0;
153
154 fail: while (--i >= 0)
155 if (amijoy[i]) {
156 input_unregister_device(amijoy_dev[i]);
157 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
158 }
159 return err;
160}
161
162static void __exit amijoy_exit(void)
163{
164 int i;
165
166 for (i = 0; i < 2; i++)
167 if (amijoy[i]) {
168 input_unregister_device(amijoy_dev[i]);
169 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
170 }
171}
172
173module_init(amijoy_init);
174module_exit(amijoy_exit);
175