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1.1 root 1: /*
2: * UAE - The Un*x Amiga Emulator
3: *
1.1.1.2 root 4: * Joystick emulation for Linux and BSD. They share too much code to
5: * split this file.
1.1 root 6: *
7: * Copyright 1997 Bernd Schmidt
1.1.1.2 root 8: * Copyright 1998 Krister Walfridsson
1.1 root 9: */
10:
11: #include "sysconfig.h"
12: #include "sysdeps.h"
13:
14: #include "config.h"
15: #include "options.h"
16: #include "memory.h"
17: #include "custom.h"
18: #include "joystick.h"
19:
1.1.1.2 root 20: #ifdef HAVE_MACHINE_SOUNDCARD_H
1.1 root 21:
1.1.1.2 root 22: /* The BSD way. */
23:
24: # include <machine/soundcard.h>
25: typedef struct joystick uae_joystick_t
26:
27: #define JS_DEVNAME_PREFIX "joy"
28:
29: #else
30:
31: /* The Linux way. */
1.1 root 32:
33: /* There are too many different versions of <linux/joystick.h>. Rather
34: * than trying to work correctly with all of them, we duplicate the
35: * necessary definitions here. */
1.1.1.2 root 36: typedef struct
1.1 root 37: {
38: int buttons;
39: int x;
40: int y;
1.1.1.2 root 41: } uae_joystick_t;
1.1 root 42:
1.1.1.2 root 43: #define JS_DEVNAME_PREFIX "js"
44:
45: #endif
46:
47: int nr_joysticks;
48:
49: static int js0, js1;
1.1 root 50:
1.1.1.3 ! root 51: struct joy_range
! 52: {
! 53: int minx, maxx, miny, maxy;
! 54: } range0, range1;
! 55:
1.1 root 56: void read_joystick(int nr, unsigned int *dir, int *button)
57: {
1.1.1.2 root 58: static int minx = INT_MAX, maxx = INT_MIN;
59: static int miny = INT_MAX, maxy = INT_MIN;
1.1 root 60: int left = 0, right = 0, top = 0, bot = 0;
1.1.1.2 root 61: uae_joystick_t buffer;
1.1 root 62: int len;
63: int fd = nr == 0 ? js0 : js1;
1.1.1.3 ! root 64: struct joy_range *r = nr == 0 ? &range0 : &range1;
1.1 root 65:
66: *dir = 0;
67: *button = 0;
68: if (nr >= nr_joysticks)
69: return;
70:
71: len = read(fd, &buffer, sizeof(buffer));
72: if (len != sizeof(buffer))
73: return;
74:
1.1.1.3 ! root 75: if (buffer.x < r->minx) r->minx = buffer.x;
! 76: if (buffer.y < r->miny) r->miny = buffer.y;
! 77: if (buffer.x > r->maxx) r->maxx = buffer.x;
! 78: if (buffer.y > r->maxy) r->maxy = buffer.y;
1.1 root 79:
1.1.1.3 ! root 80: if (buffer.x < (r->minx + (r->maxx - r->minx)/3))
1.1 root 81: left = 1;
1.1.1.3 ! root 82: else if (buffer.x > (r->minx + 2*(r->maxx - r->minx)/3))
1.1 root 83: right = 1;
84:
1.1.1.3 ! root 85: if (buffer.y < (r->miny + (r->maxy - r->miny)/3))
1.1 root 86: top = 1;
1.1.1.3 ! root 87: else if (buffer.y > (r->miny + 2*(r->maxy - r->miny)/3))
1.1 root 88: bot = 1;
89:
90: if (left) top = !top;
91: if (right) bot = !bot;
92: *dir = bot | (right << 1) | (top << 8) | (left << 9);
93: *button = buffer.buttons & 3;
94: }
95:
96: void init_joystick(void)
97: {
98: nr_joysticks = 0;
99: js0 = -1; js1 = -1;
1.1.1.2 root 100: js0 = open("/dev/" JS_DEVNAME_PREFIX "0", O_RDONLY);
1.1 root 101: if (js0 < 0) {
102: write_log ("No joysticks found\n");
103: return;
104: }
105: nr_joysticks = 1;
1.1.1.2 root 106: js1 = open("/dev/" JS_DEVNAME_PREFIX "1", O_RDONLY);
1.1 root 107: if (js1 < 0) {
108: write_log ("Found one joystick\n");
109: return;
110: }
111: write_log ("Found two joysticks\n");
112: nr_joysticks = 2;
1.1.1.3 ! root 113:
! 114: range0.minx = INT_MAX;
! 115: range0.maxx = INT_MIN;
! 116: range0.miny = INT_MAX;
! 117: range0.maxy = INT_MIN;
! 118: range1.minx = INT_MAX;
! 119: range1.maxx = INT_MIN;
! 120: range1.miny = INT_MAX;
! 121: range1.maxy = INT_MIN;
1.1 root 122: }
123:
124: void close_joystick(void)
125: {
126: if (js0 >= 0)
1.1.1.3 ! root 127: close (js0);
1.1 root 128: if (js1 >= 0)
1.1.1.3 ! root 129: close (js1);
1.1 root 130: }
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