1 #ifndef _INPUT_COMPAT_H 2 #define _INPUT_COMPAT_H 3 4 /* 5 * 32bit compatibility wrappers for the input subsystem. 6 * 7 * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License version 2 as published by 11 * the Free Software Foundation. 12 */ 13 14 #include <linux/compiler.h> 15 #include <linux/compat.h> 16 #include <linux/input.h> 17 18 #ifdef CONFIG_COMPAT 19 20 /* Note to the author of this code: did it ever occur to 21 you why the ifdefs are needed? Think about it again. -AK */ 22 #ifdef CONFIG_X86_64 23 # define INPUT_COMPAT_TEST is_compat_task() 24 #elif defined(CONFIG_IA64) 25 # define INPUT_COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current)) 26 #elif defined(CONFIG_S390) 27 # define INPUT_COMPAT_TEST test_thread_flag(TIF_31BIT) 28 #elif defined(CONFIG_MIPS) 29 # define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT_ADDR) 30 #else 31 # define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT) 32 #endif 33 34 struct input_event_compat { 35 struct compat_timeval time; 36 __u16 type; 37 __u16 code; 38 __s32 value; 39 }; 40 41 struct ff_periodic_effect_compat { 42 __u16 waveform; 43 __u16 period; 44 __s16 magnitude; 45 __s16 offset; 46 __u16 phase; 47 48 struct ff_envelope envelope; 49 50 __u32 custom_len; 51 compat_uptr_t custom_data; 52 }; 53 54 struct ff_effect_compat { 55 __u16 type; 56 __s16 id; 57 __u16 direction; 58 struct ff_trigger trigger; 59 struct ff_replay replay; 60 61 union { 62 struct ff_constant_effect constant; 63 struct ff_ramp_effect ramp; 64 struct ff_periodic_effect_compat periodic; 65 struct ff_condition_effect condition[2]; /* One for each axis */ 66 struct ff_rumble_effect rumble; 67 } u; 68 }; 69 70 static inline size_t input_event_size(void) 71 { 72 return INPUT_COMPAT_TEST ? 73 sizeof(struct input_event_compat) : sizeof(struct input_event); 74 } 75 76 #else 77 78 static inline size_t input_event_size(void) 79 { 80 return sizeof(struct input_event); 81 } 82 83 #endif /* CONFIG_COMPAT */ 84 85 int input_event_from_user(const char __user *buffer, 86 struct input_event *event); 87 88 int input_event_to_user(char __user *buffer, 89 const struct input_event *event); 90 91 int input_ff_effect_from_user(const char __user *buffer, size_t size, 92 struct ff_effect *effect); 93 94 #endif /* _INPUT_COMPAT_H */ 95