1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (c) 1996-2001 Vojtech Pavlik |
4 | */ |
5 | |
6 | /* |
7 | * This is just a very simple driver that can dump the data |
8 | * out of the joystick port into the syslog ... |
9 | */ |
10 | |
11 | #include <linux/module.h> |
12 | #include <linux/gameport.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/delay.h> |
15 | #include <linux/slab.h> |
16 | |
17 | #define DRIVER_DESC "Gameport data dumper module" |
18 | |
19 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>" ); |
20 | MODULE_DESCRIPTION(DRIVER_DESC); |
21 | MODULE_LICENSE("GPL" ); |
22 | |
23 | #define BUF_SIZE 256 |
24 | |
25 | struct joydump { |
26 | unsigned int time; |
27 | unsigned char data; |
28 | }; |
29 | |
30 | static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv) |
31 | { |
32 | struct joydump *buf; /* all entries */ |
33 | struct joydump *dump, *prev; /* one entry each */ |
34 | int axes[4], buttons; |
35 | int i, j, t, timeout; |
36 | unsigned long flags; |
37 | unsigned char u; |
38 | |
39 | printk(KERN_INFO "joydump: ,------------------ START ----------------.\n" ); |
40 | printk(KERN_INFO "joydump: | Dumping: %30s |\n" , gameport->phys); |
41 | printk(KERN_INFO "joydump: | Speed: %28d kHz |\n" , gameport->speed); |
42 | |
43 | if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) { |
44 | |
45 | printk(KERN_INFO "joydump: | Raw mode not available - trying cooked. |\n" ); |
46 | |
47 | if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) { |
48 | |
49 | printk(KERN_INFO "joydump: | Cooked not available either. Failing. |\n" ); |
50 | printk(KERN_INFO "joydump: `------------------- END -----------------'\n" ); |
51 | return -ENODEV; |
52 | } |
53 | |
54 | gameport_cooked_read(gameport, axes, buttons: &buttons); |
55 | |
56 | for (i = 0; i < 4; i++) |
57 | printk(KERN_INFO "joydump: | Axis %d: %4d. |\n" , i, axes[i]); |
58 | printk(KERN_INFO "joydump: | Buttons %02x. |\n" , buttons); |
59 | printk(KERN_INFO "joydump: `------------------- END -----------------'\n" ); |
60 | } |
61 | |
62 | timeout = gameport_time(gameport, time: 10000); /* 10 ms */ |
63 | |
64 | buf = kmalloc_array(BUF_SIZE, size: sizeof(struct joydump), GFP_KERNEL); |
65 | if (!buf) { |
66 | printk(KERN_INFO "joydump: no memory for testing\n" ); |
67 | goto jd_end; |
68 | } |
69 | dump = buf; |
70 | t = 0; |
71 | i = 1; |
72 | |
73 | local_irq_save(flags); |
74 | |
75 | u = gameport_read(gameport); |
76 | |
77 | dump->data = u; |
78 | dump->time = t; |
79 | dump++; |
80 | |
81 | gameport_trigger(gameport); |
82 | |
83 | while (i < BUF_SIZE && t < timeout) { |
84 | |
85 | dump->data = gameport_read(gameport); |
86 | |
87 | if (dump->data ^ u) { |
88 | u = dump->data; |
89 | dump->time = t; |
90 | i++; |
91 | dump++; |
92 | } |
93 | t++; |
94 | } |
95 | |
96 | local_irq_restore(flags); |
97 | |
98 | /* |
99 | * Dump data. |
100 | */ |
101 | |
102 | t = i; |
103 | dump = buf; |
104 | prev = dump; |
105 | |
106 | printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n" ); |
107 | printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: " , 0, 0); |
108 | for (j = 7; j >= 0; j--) |
109 | printk("%d" , (dump->data >> j) & 1); |
110 | printk(" |\n" ); |
111 | dump++; |
112 | |
113 | for (i = 1; i < t; i++, dump++, prev++) { |
114 | printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: " , |
115 | i, dump->time - prev->time); |
116 | for (j = 7; j >= 0; j--) |
117 | printk("%d" , (dump->data >> j) & 1); |
118 | printk(" |\n" ); |
119 | } |
120 | kfree(objp: buf); |
121 | |
122 | jd_end: |
123 | printk(KERN_INFO "joydump: `------------------- END -----------------'\n" ); |
124 | |
125 | return 0; |
126 | } |
127 | |
128 | static void joydump_disconnect(struct gameport *gameport) |
129 | { |
130 | gameport_close(gameport); |
131 | } |
132 | |
133 | static struct gameport_driver joydump_drv = { |
134 | .driver = { |
135 | .name = "joydump" , |
136 | }, |
137 | .description = DRIVER_DESC, |
138 | .connect = joydump_connect, |
139 | .disconnect = joydump_disconnect, |
140 | }; |
141 | |
142 | module_gameport_driver(joydump_drv); |
143 | |