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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/amigahw.h>
39#include <asm/amigaints.h>
40
41MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42MODULE_DESCRIPTION("Driver for Amiga joysticks");
43MODULE_LICENSE("GPL");
44
45static int amijoy[2] = { 0, 1 };
46module_param_array_named(map, amijoy, uint, NULL, 0);
47MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");
48
49static int amijoy_used;
50static DEFINE_MUTEX(amijoy_mutex);
51static struct input_dev *amijoy_dev[2];
52static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };
53
54static irqreturn_t amijoy_interrupt(int irq, void *dummy)
55{
56 int i, data = 0, button = 0;
57
58 for (i = 0; i < 2; i++)
59 if (amijoy[i]) {
60
61 switch (i) {
62 case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;
63 case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;
64 }
65
66 input_report_key(amijoy_dev[i], BTN_TRIGGER, button);
67
68 input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));
69 data = ~(data ^ (data << 1));
70 input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));
71
72 input_sync(amijoy_dev[i]);
73 }
74 return IRQ_HANDLED;
75}
76
77static int amijoy_open(struct input_dev *dev)
78{
79 int err;
80
81 err = mutex_lock_interruptible(&amijoy_mutex);
82 if (err)
83 return err;
84
85 if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {
86 printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
87 err = -EBUSY;
88 goto out;
89 }
90
91 amijoy_used++;
92out:
93 mutex_unlock(&amijoy_mutex);
94 return err;
95}
96
97static void amijoy_close(struct input_dev *dev)
98{
99 mutex_lock(&amijoy_mutex);
100 if (!--amijoy_used)
101 free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);
102 mutex_unlock(&amijoy_mutex);
103}
104
105static int __init amijoy_init(void)
106{
107 int i, j;
108 int err;
109
110 if (!MACH_IS_AMIGA)
111 return -ENODEV;
112
113 for (i = 0; i < 2; i++) {
114 if (!amijoy[i])
115 continue;
116
117 amijoy_dev[i] = input_allocate_device();
118 if (!amijoy_dev[i]) {
119 err = -ENOMEM;
120 goto fail;
121 }
122
123 if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {
124 input_free_device(amijoy_dev[i]);
125 err = -EBUSY;
126 goto fail;
127 }
128
129 amijoy_dev[i]->name = "Amiga joystick";
130 amijoy_dev[i]->phys = amijoy_phys[i];
131 amijoy_dev[i]->id.bustype = BUS_AMIGA;
132 amijoy_dev[i]->id.vendor = 0x0001;
133 amijoy_dev[i]->id.product = 0x0003;
134 amijoy_dev[i]->id.version = 0x0100;
135
136 amijoy_dev[i]->open = amijoy_open;
137 amijoy_dev[i]->close = amijoy_close;
138
139 amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
140 amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);
141 amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
142 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
143 for (j = 0; j < 2; j++) {
144 input_set_abs_params(amijoy_dev[i], ABS_X + j,
145 -1, 1, 0, 0);
146 }
147
148 err = input_register_device(amijoy_dev[i]);
149 if (err) {
150 input_free_device(amijoy_dev[i]);
151 goto fail;
152 }
153 }
154 return 0;
155
156 fail: while (--i >= 0)
157 if (amijoy[i]) {
158 input_unregister_device(amijoy_dev[i]);
159 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
160 }
161 return err;
162}
163
164static void __exit amijoy_exit(void)
165{
166 int i;
167
168 for (i = 0; i < 2; i++)
169 if (amijoy[i]) {
170 input_unregister_device(amijoy_dev[i]);
171 release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);
172 }
173}
174
175module_init(amijoy_init);
176module_exit(amijoy_exit);
177
