Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/gameport.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/delay.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 18 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
| 20 | #define DRIVER_DESC "Gameport data dumper module" |
| 21 | |
| 22 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| 23 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 24 | MODULE_LICENSE("GPL"); |
| 25 | |
| 26 | #define BUF_SIZE 256 |
| 27 | |
| 28 | struct joydump { |
| 29 | unsigned int time; |
| 30 | unsigned char data; |
| 31 | }; |
| 32 | |
| 33 | static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv) |
| 34 | { |
| 35 | struct joydump *buf; /* all entries */ |
| 36 | struct joydump *dump, *prev; /* one entry each */ |
| 37 | int axes[4], buttons; |
| 38 | int i, j, t, timeout; |
| 39 | unsigned long flags; |
| 40 | unsigned char u; |
| 41 | |
| 42 | printk(KERN_INFO "joydump: ,------------------ START ----------------.\n"); |
| 43 | printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys); |
| 44 | printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed); |
| 45 | |
| 46 | if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) { |
| 47 | |
| 48 | printk(KERN_INFO "joydump: | Raw mode not available - trying cooked. |\n"); |
| 49 | |
| 50 | if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) { |
| 51 | |
| 52 | printk(KERN_INFO "joydump: | Cooked not available either. Failing. |\n"); |
| 53 | printk(KERN_INFO "joydump: `------------------- END -----------------'\n"); |
| 54 | return -ENODEV; |
| 55 | } |
| 56 | |
| 57 | gameport_cooked_read(gameport, axes, &buttons); |
| 58 | |
| 59 | for (i = 0; i < 4; i++) |
| 60 | printk(KERN_INFO "joydump: | Axis %d: %4d. |\n", i, axes[i]); |
| 61 | printk(KERN_INFO "joydump: | Buttons %02x. |\n", buttons); |
| 62 | printk(KERN_INFO "joydump: `------------------- END -----------------'\n"); |
| 63 | } |
| 64 | |
| 65 | timeout = gameport_time(gameport, 10000); /* 10 ms */ |
| 66 | |
Kees Cook | 6da2ec5 | 2018-06-12 13:55:00 -0700 | [diff] [blame] | 67 | buf = kmalloc_array(BUF_SIZE, sizeof(struct joydump), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | if (!buf) { |
| 69 | printk(KERN_INFO "joydump: no memory for testing\n"); |
| 70 | goto jd_end; |
| 71 | } |
| 72 | dump = buf; |
| 73 | t = 0; |
| 74 | i = 1; |
| 75 | |
| 76 | local_irq_save(flags); |
| 77 | |
| 78 | u = gameport_read(gameport); |
| 79 | |
| 80 | dump->data = u; |
| 81 | dump->time = t; |
| 82 | dump++; |
| 83 | |
| 84 | gameport_trigger(gameport); |
| 85 | |
| 86 | while (i < BUF_SIZE && t < timeout) { |
| 87 | |
| 88 | dump->data = gameport_read(gameport); |
| 89 | |
| 90 | if (dump->data ^ u) { |
| 91 | u = dump->data; |
| 92 | dump->time = t; |
| 93 | i++; |
| 94 | dump++; |
| 95 | } |
| 96 | t++; |
| 97 | } |
| 98 | |
| 99 | local_irq_restore(flags); |
| 100 | |
| 101 | /* |
| 102 | * Dump data. |
| 103 | */ |
| 104 | |
| 105 | t = i; |
| 106 | dump = buf; |
| 107 | prev = dump; |
| 108 | |
| 109 | printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n"); |
| 110 | printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0); |
| 111 | for (j = 7; j >= 0; j--) |
| 112 | printk("%d", (dump->data >> j) & 1); |
| 113 | printk(" |\n"); |
| 114 | dump++; |
| 115 | |
| 116 | for (i = 1; i < t; i++, dump++, prev++) { |
| 117 | printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", |
| 118 | i, dump->time - prev->time); |
| 119 | for (j = 7; j >= 0; j--) |
| 120 | printk("%d", (dump->data >> j) & 1); |
| 121 | printk(" |\n"); |
| 122 | } |
| 123 | kfree(buf); |
| 124 | |
| 125 | jd_end: |
| 126 | printk(KERN_INFO "joydump: `------------------- END -----------------'\n"); |
| 127 | |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static void joydump_disconnect(struct gameport *gameport) |
| 132 | { |
| 133 | gameport_close(gameport); |
| 134 | } |
| 135 | |
| 136 | static struct gameport_driver joydump_drv = { |
| 137 | .driver = { |
| 138 | .name = "joydump", |
| 139 | }, |
| 140 | .description = DRIVER_DESC, |
| 141 | .connect = joydump_connect, |
| 142 | .disconnect = joydump_disconnect, |
| 143 | }; |
| 144 | |
Axel Lin | 98a8413 | 2012-04-03 23:52:27 -0700 | [diff] [blame] | 145 | module_gameport_driver(joydump_drv); |