^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * The input core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 1999-2002 Vojtech Pavlik
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define pr_fmt(fmt) KBUILD_BASENAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/idr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/input/mt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/major.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/rcupdate.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "input-compat.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "input-poller.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) MODULE_DESCRIPTION("Input core");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define INPUT_MAX_CHAR_DEVICES 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define INPUT_FIRST_DYNAMIC_DEV 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static DEFINE_IDA(input_ida);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static LIST_HEAD(input_dev_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static LIST_HEAD(input_handler_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * input_mutex protects access to both input_dev_list and input_handler_list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * This also causes input_[un]register_device and input_[un]register_handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * be mutually exclusive which simplifies locking in drivers implementing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * input handlers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static DEFINE_MUTEX(input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static const struct input_value input_value_sync = { EV_SYN, SYN_REPORT, 1 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static inline int is_event_supported(unsigned int code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned long *bm, unsigned int max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return code <= max && test_bit(code, bm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static int input_defuzz_abs_event(int value, int old_val, int fuzz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (fuzz) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (value > old_val - fuzz / 2 && value < old_val + fuzz / 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return old_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (value > old_val - fuzz && value < old_val + fuzz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return (old_val * 3 + value) / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (value > old_val - fuzz * 2 && value < old_val + fuzz * 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return (old_val + value) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static void input_start_autorepeat(struct input_dev *dev, int code)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (test_bit(EV_REP, dev->evbit) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) dev->timer.function) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) dev->repeat_key = code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) mod_timer(&dev->timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static void input_stop_autorepeat(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) del_timer(&dev->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * Pass event first through all filters and then, if event has not been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * filtered out, through all open handles. This function is called with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * dev->event_lock held and interrupts disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static unsigned int input_to_handler(struct input_handle *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct input_value *vals, unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct input_handler *handler = handle->handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct input_value *end = vals;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct input_value *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (handler->filter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) for (v = vals; v != vals + count; v++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (handler->filter(handle, v->type, v->code, v->value))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (end != v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) *end = *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) end++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) count = end - vals;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (handler->events)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) handler->events(handle, vals, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) else if (handler->event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) for (v = vals; v != vals + count; v++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) handler->event(handle, v->type, v->code, v->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * Pass values first through all filters and then, if event has not been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * filtered out, through all open handles. This function is called with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * dev->event_lock held and interrupts disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static void input_pass_values(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct input_value *vals, unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct input_handle *handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct input_value *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) handle = rcu_dereference(dev->grab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) count = input_to_handler(handle, vals, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) list_for_each_entry_rcu(handle, &dev->h_list, d_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (handle->open) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) count = input_to_handler(handle, vals, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /* trigger auto repeat for key events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (test_bit(EV_REP, dev->evbit) && test_bit(EV_KEY, dev->evbit)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) for (v = vals; v != vals + count; v++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (v->type == EV_KEY && v->value != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (v->value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) input_start_autorepeat(dev, v->code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) input_stop_autorepeat(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static void input_pass_event(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) unsigned int type, unsigned int code, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct input_value vals[] = { { type, code, value } };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) input_pass_values(dev, vals, ARRAY_SIZE(vals));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * Generate software autorepeat event. Note that we take
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * dev->event_lock here to avoid racing with input_event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * which may cause keys get "stuck".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static void input_repeat_key(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct input_dev *dev = from_timer(dev, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) spin_lock_irqsave(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (test_bit(dev->repeat_key, dev->key) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct input_value vals[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) { EV_KEY, dev->repeat_key, 2 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) input_value_sync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) input_set_timestamp(dev, ktime_get());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) input_pass_values(dev, vals, ARRAY_SIZE(vals));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (dev->rep[REP_PERIOD])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) mod_timer(&dev->timer, jiffies +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) msecs_to_jiffies(dev->rep[REP_PERIOD]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) spin_unlock_irqrestore(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) #define INPUT_IGNORE_EVENT 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #define INPUT_PASS_TO_HANDLERS 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) #define INPUT_PASS_TO_DEVICE 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) #define INPUT_SLOT 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) #define INPUT_FLUSH 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) #define INPUT_PASS_TO_ALL (INPUT_PASS_TO_HANDLERS | INPUT_PASS_TO_DEVICE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static int input_handle_abs_event(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) unsigned int code, int *pval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct input_mt *mt = dev->mt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) bool is_mt_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int *pold;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (code == ABS_MT_SLOT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * "Stage" the event; we'll flush it later, when we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * get actual touch data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (mt && *pval >= 0 && *pval < mt->num_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) mt->slot = *pval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return INPUT_IGNORE_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) is_mt_event = input_is_mt_value(code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (!is_mt_event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) pold = &dev->absinfo[code].value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) } else if (mt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) pold = &mt->slots[mt->slot].abs[code - ABS_MT_FIRST];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * Bypass filtering for multi-touch events when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * not employing slots.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) pold = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (pold) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) *pval = input_defuzz_abs_event(*pval, *pold,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) dev->absinfo[code].fuzz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (*pold == *pval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return INPUT_IGNORE_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) *pold = *pval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) /* Flush pending "slot" event */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (is_mt_event && mt && mt->slot != input_abs_get_val(dev, ABS_MT_SLOT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) input_abs_set_val(dev, ABS_MT_SLOT, mt->slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return INPUT_PASS_TO_HANDLERS | INPUT_SLOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return INPUT_PASS_TO_HANDLERS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static int input_get_disposition(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) unsigned int type, unsigned int code, int *pval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int disposition = INPUT_IGNORE_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) int value = *pval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) case EV_SYN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) switch (code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) case SYN_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) disposition = INPUT_PASS_TO_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) case SYN_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) disposition = INPUT_PASS_TO_HANDLERS | INPUT_FLUSH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) case SYN_MT_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) disposition = INPUT_PASS_TO_HANDLERS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) case EV_KEY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (is_event_supported(code, dev->keybit, KEY_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) /* auto-repeat bypasses state updates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (value == 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) disposition = INPUT_PASS_TO_HANDLERS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (!!test_bit(code, dev->key) != !!value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) __change_bit(code, dev->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) disposition = INPUT_PASS_TO_HANDLERS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) case EV_SW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (is_event_supported(code, dev->swbit, SW_MAX) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) !!test_bit(code, dev->sw) != !!value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) __change_bit(code, dev->sw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) disposition = INPUT_PASS_TO_HANDLERS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) case EV_ABS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (is_event_supported(code, dev->absbit, ABS_MAX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) disposition = input_handle_abs_event(dev, code, &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) case EV_REL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (is_event_supported(code, dev->relbit, REL_MAX) && value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) disposition = INPUT_PASS_TO_HANDLERS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) case EV_MSC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (is_event_supported(code, dev->mscbit, MSC_MAX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) disposition = INPUT_PASS_TO_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) case EV_LED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (is_event_supported(code, dev->ledbit, LED_MAX) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) !!test_bit(code, dev->led) != !!value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) __change_bit(code, dev->led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) disposition = INPUT_PASS_TO_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) case EV_SND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (is_event_supported(code, dev->sndbit, SND_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (!!test_bit(code, dev->snd) != !!value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) __change_bit(code, dev->snd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) disposition = INPUT_PASS_TO_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) case EV_REP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (code <= REP_MAX && value >= 0 && dev->rep[code] != value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) dev->rep[code] = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) disposition = INPUT_PASS_TO_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) case EV_FF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (value >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) disposition = INPUT_PASS_TO_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) case EV_PWR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) disposition = INPUT_PASS_TO_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) *pval = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) return disposition;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) static void input_handle_event(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) unsigned int type, unsigned int code, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) int disposition = input_get_disposition(dev, type, code, &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (disposition != INPUT_IGNORE_EVENT && type != EV_SYN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) add_input_randomness(type, code, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) dev->event(dev, type, code, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (!dev->vals)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (disposition & INPUT_PASS_TO_HANDLERS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) struct input_value *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (disposition & INPUT_SLOT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) v = &dev->vals[dev->num_vals++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) v->type = EV_ABS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) v->code = ABS_MT_SLOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) v->value = dev->mt->slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) v = &dev->vals[dev->num_vals++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) v->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) v->code = code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) v->value = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (disposition & INPUT_FLUSH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (dev->num_vals >= 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) input_pass_values(dev, dev->vals, dev->num_vals);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) dev->num_vals = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) * Reset the timestamp on flush so we won't end up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) * with a stale one. Note we only need to reset the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * monolithic one as we use its presence when deciding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * whether to generate a synthetic timestamp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) dev->timestamp[INPUT_CLK_MONO] = ktime_set(0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) } else if (dev->num_vals >= dev->max_vals - 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) dev->vals[dev->num_vals++] = input_value_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) input_pass_values(dev, dev->vals, dev->num_vals);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) dev->num_vals = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * input_event() - report new input event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) * @dev: device that generated the event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * @type: type of the event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * @code: event code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * @value: value of the event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * This function should be used by drivers implementing various input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * devices to report input events. See also input_inject_event().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * NOTE: input_event() may be safely used right after input device was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * allocated with input_allocate_device(), even before it is registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * with input_register_device(), but the event will not reach any of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * input handlers. Such early invocation of input_event() may be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * to 'seed' initial state of a switch or initial position of absolute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * axis, etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) void input_event(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) unsigned int type, unsigned int code, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (is_event_supported(type, dev->evbit, EV_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) spin_lock_irqsave(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) input_handle_event(dev, type, code, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) spin_unlock_irqrestore(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) EXPORT_SYMBOL(input_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * input_inject_event() - send input event from input handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * @handle: input handle to send event through
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * @type: type of the event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) * @code: event code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) * @value: value of the event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * Similar to input_event() but will ignore event if device is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) * "grabbed" and handle injecting event is not the one that owns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) * the device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) void input_inject_event(struct input_handle *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) unsigned int type, unsigned int code, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) struct input_handle *grab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (is_event_supported(type, dev->evbit, EV_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) spin_lock_irqsave(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) grab = rcu_dereference(dev->grab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (!grab || grab == handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) input_handle_event(dev, type, code, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) spin_unlock_irqrestore(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) EXPORT_SYMBOL(input_inject_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) * input_alloc_absinfo - allocates array of input_absinfo structs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) * @dev: the input device emitting absolute events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) * If the absinfo struct the caller asked for is already allocated, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) * functions will not do anything.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) void input_alloc_absinfo(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (dev->absinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) dev->absinfo = kcalloc(ABS_CNT, sizeof(*dev->absinfo), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (!dev->absinfo) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) dev_err(dev->dev.parent ?: &dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) "%s: unable to allocate memory\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) * We will handle this allocation failure in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * input_register_device() when we refuse to register input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * device with ABS bits but without absinfo.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) EXPORT_SYMBOL(input_alloc_absinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) void input_set_abs_params(struct input_dev *dev, unsigned int axis,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) int min, int max, int fuzz, int flat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) struct input_absinfo *absinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) input_alloc_absinfo(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (!dev->absinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) absinfo = &dev->absinfo[axis];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) absinfo->minimum = min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) absinfo->maximum = max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) absinfo->fuzz = fuzz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) absinfo->flat = flat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) __set_bit(EV_ABS, dev->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) __set_bit(axis, dev->absbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) EXPORT_SYMBOL(input_set_abs_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) * input_grab_device - grabs device for exclusive use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) * @handle: input handle that wants to own the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * When a device is grabbed by an input handle all events generated by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) * the device are delivered only to this handle. Also events injected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) * by other input handles are ignored while device is grabbed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) int input_grab_device(struct input_handle *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) retval = mutex_lock_interruptible(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (dev->grab) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) retval = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) rcu_assign_pointer(dev->grab, handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) EXPORT_SYMBOL(input_grab_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) static void __input_release_device(struct input_handle *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) struct input_handle *grabber;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) grabber = rcu_dereference_protected(dev->grab,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) lockdep_is_held(&dev->mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (grabber == handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) rcu_assign_pointer(dev->grab, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) /* Make sure input_pass_event() notices that grab is gone */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) list_for_each_entry(handle, &dev->h_list, d_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) if (handle->open && handle->handler->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) handle->handler->start(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * input_release_device - release previously grabbed device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * @handle: input handle that owns the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * Releases previously grabbed device so that other input handles can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * start receiving input events. Upon release all handlers attached
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * to the device have their start() method called so they have a change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * to synchronize device state with the rest of the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) void input_release_device(struct input_handle *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) mutex_lock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) __input_release_device(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) EXPORT_SYMBOL(input_release_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * input_open_device - open input device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * @handle: handle through which device is being accessed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) * This function should be called by input handlers when they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) * want to start receive events from given input device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) int input_open_device(struct input_handle *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) retval = mutex_lock_interruptible(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if (dev->going_away) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) retval = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) handle->open++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (dev->users++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * Device is already opened, so we can exit immediately and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * report success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if (dev->open) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) retval = dev->open(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) dev->users--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) handle->open--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) * Make sure we are not delivering any more events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) * through this handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) if (dev->poller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) input_dev_poller_start(dev->poller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) EXPORT_SYMBOL(input_open_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) int input_flush_device(struct input_handle *handle, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) retval = mutex_lock_interruptible(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) if (dev->flush)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) retval = dev->flush(dev, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) EXPORT_SYMBOL(input_flush_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) * input_close_device - close input device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) * @handle: handle through which device is being accessed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) * This function should be called by input handlers when they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) * want to stop receive events from given input device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) void input_close_device(struct input_handle *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) mutex_lock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) __input_release_device(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (!--dev->users) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (dev->poller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) input_dev_poller_stop(dev->poller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) if (dev->close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) dev->close(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if (!--handle->open) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) * synchronize_rcu() makes sure that input_pass_event()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) * completed and that no more input events are delivered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) * through this handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) EXPORT_SYMBOL(input_close_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) * Simulate keyup events for all keys that are marked as pressed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) * The function must be called with dev->event_lock held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) static void input_dev_release_keys(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) bool need_sync = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) int code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) for_each_set_bit(code, dev->key, KEY_CNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) input_pass_event(dev, EV_KEY, code, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) need_sync = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) if (need_sync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) input_pass_event(dev, EV_SYN, SYN_REPORT, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) memset(dev->key, 0, sizeof(dev->key));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) * Prepare device for unregistering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) static void input_disconnect_device(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) struct input_handle *handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) * Mark device as going away. Note that we take dev->mutex here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) * not to protect access to dev->going_away but rather to ensure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) * that there are no threads in the middle of input_open_device()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) mutex_lock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) dev->going_away = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) spin_lock_irq(&dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) * Simulate keyup events for all pressed keys so that handlers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) * are not left with "stuck" keys. The driver may continue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) * generate events even after we done here but they will not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) * reach any handlers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) input_dev_release_keys(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) list_for_each_entry(handle, &dev->h_list, d_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) handle->open = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) spin_unlock_irq(&dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) * @ke: keymap entry containing scancode to be converted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) * @scancode: pointer to the location where converted scancode should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) * be stored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * This function is used to convert scancode stored in &struct keymap_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) * into scalar form understood by legacy keymap handling methods. These
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) * methods expect scancodes to be represented as 'unsigned int'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) int input_scancode_to_scalar(const struct input_keymap_entry *ke,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) unsigned int *scancode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) switch (ke->len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) *scancode = *((u8 *)ke->scancode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) *scancode = *((u16 *)ke->scancode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) case 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) *scancode = *((u32 *)ke->scancode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) EXPORT_SYMBOL(input_scancode_to_scalar);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) * Those routines handle the default case where no [gs]etkeycode() is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) * defined. In this case, an array indexed by the scancode is used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) static unsigned int input_fetch_keycode(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) unsigned int index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) switch (dev->keycodesize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) return ((u8 *)dev->keycode)[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) return ((u16 *)dev->keycode)[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) return ((u32 *)dev->keycode)[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) static int input_default_getkeycode(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) struct input_keymap_entry *ke)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) unsigned int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) if (!dev->keycodesize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) if (ke->flags & INPUT_KEYMAP_BY_INDEX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) index = ke->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) error = input_scancode_to_scalar(ke, &index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) if (index >= dev->keycodemax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) ke->keycode = input_fetch_keycode(dev, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) ke->index = index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) ke->len = sizeof(index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) memcpy(ke->scancode, &index, sizeof(index));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) static int input_default_setkeycode(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) const struct input_keymap_entry *ke,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) unsigned int *old_keycode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) unsigned int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) if (!dev->keycodesize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) index = ke->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) error = input_scancode_to_scalar(ke, &index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (index >= dev->keycodemax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) if (dev->keycodesize < sizeof(ke->keycode) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) (ke->keycode >> (dev->keycodesize * 8)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) switch (dev->keycodesize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) case 1: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) u8 *k = (u8 *)dev->keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) *old_keycode = k[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) k[index] = ke->keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) case 2: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) u16 *k = (u16 *)dev->keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) *old_keycode = k[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) k[index] = ke->keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) default: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) u32 *k = (u32 *)dev->keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) *old_keycode = k[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) k[index] = ke->keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) if (*old_keycode <= KEY_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) __clear_bit(*old_keycode, dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) for (i = 0; i < dev->keycodemax; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) if (input_fetch_keycode(dev, i) == *old_keycode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) __set_bit(*old_keycode, dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) /* Setting the bit twice is useless, so break */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) __set_bit(ke->keycode, dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) * input_get_keycode - retrieve keycode currently mapped to a given scancode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) * @dev: input device which keymap is being queried
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) * @ke: keymap entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) * This function should be called by anyone interested in retrieving current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) * keymap. Presently evdev handlers use it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) spin_lock_irqsave(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) retval = dev->getkeycode(dev, ke);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) spin_unlock_irqrestore(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) EXPORT_SYMBOL(input_get_keycode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) * input_set_keycode - attribute a keycode to a given scancode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) * @dev: input device which keymap is being updated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) * @ke: new keymap entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) * This function should be called by anyone needing to update current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) * keymap. Presently keyboard and evdev handlers use it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) int input_set_keycode(struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) const struct input_keymap_entry *ke)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) unsigned int old_keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) if (ke->keycode > KEY_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) spin_lock_irqsave(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) retval = dev->setkeycode(dev, ke, &old_keycode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) /* Make sure KEY_RESERVED did not get enabled. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) __clear_bit(KEY_RESERVED, dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) * Simulate keyup event if keycode is not present
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) * in the keymap anymore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) if (old_keycode > KEY_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) dev_warn(dev->dev.parent ?: &dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) "%s: got too big old keycode %#x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) __func__, old_keycode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) } else if (test_bit(EV_KEY, dev->evbit) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) !is_event_supported(old_keycode, dev->keybit, KEY_MAX) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) __test_and_clear_bit(old_keycode, dev->key)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) struct input_value vals[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) { EV_KEY, old_keycode, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) input_value_sync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) input_pass_values(dev, vals, ARRAY_SIZE(vals));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) spin_unlock_irqrestore(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) EXPORT_SYMBOL(input_set_keycode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) bool input_match_device_id(const struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) const struct input_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) if (id->bustype != dev->id.bustype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) if (id->vendor != dev->id.vendor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) if (id->product != dev->id.product)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) if (id->version != dev->id.version)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) if (!bitmap_subset(id->evbit, dev->evbit, EV_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) !bitmap_subset(id->keybit, dev->keybit, KEY_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) !bitmap_subset(id->relbit, dev->relbit, REL_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) !bitmap_subset(id->absbit, dev->absbit, ABS_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) !bitmap_subset(id->mscbit, dev->mscbit, MSC_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) !bitmap_subset(id->ledbit, dev->ledbit, LED_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) !bitmap_subset(id->sndbit, dev->sndbit, SND_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) !bitmap_subset(id->ffbit, dev->ffbit, FF_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) !bitmap_subset(id->swbit, dev->swbit, SW_MAX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) !bitmap_subset(id->propbit, dev->propbit, INPUT_PROP_MAX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) EXPORT_SYMBOL(input_match_device_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) static const struct input_device_id *input_match_device(struct input_handler *handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) const struct input_device_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) for (id = handler->id_table; id->flags || id->driver_info; id++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) if (input_match_device_id(dev, id) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) (!handler->match || handler->match(handler, dev))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) return id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) static int input_attach_handler(struct input_dev *dev, struct input_handler *handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) const struct input_device_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) id = input_match_device(handler, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) if (!id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) error = handler->connect(handler, dev, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) if (error && error != -ENODEV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) pr_err("failed to attach handler %s to device %s, error: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) handler->name, kobject_name(&dev->dev.kobj), error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) static int input_bits_to_string(char *buf, int buf_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) unsigned long bits, bool skip_empty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) int len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) if (in_compat_syscall()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) u32 dword = bits >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) if (dword || !skip_empty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) len += snprintf(buf, buf_size, "%x ", dword);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) dword = bits & 0xffffffffUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) if (dword || !skip_empty || len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) len += snprintf(buf + len, max(buf_size - len, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) "%x", dword);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) if (bits || !skip_empty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) len += snprintf(buf, buf_size, "%lx", bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) #else /* !CONFIG_COMPAT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) static int input_bits_to_string(char *buf, int buf_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) unsigned long bits, bool skip_empty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) return bits || !skip_empty ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) snprintf(buf, buf_size, "%lx", bits) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) static struct proc_dir_entry *proc_bus_input_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) static int input_devices_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) static inline void input_wakeup_procfs_readers(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) input_devices_state++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) wake_up(&input_devices_poll_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) static __poll_t input_proc_devices_poll(struct file *file, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) poll_wait(file, &input_devices_poll_wait, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) if (file->f_version != input_devices_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) file->f_version = input_devices_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) return EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) union input_seq_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) unsigned short pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) bool mutex_acquired;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) void *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) union input_seq_state *state = (union input_seq_state *)&seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) /* We need to fit into seq->private pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) error = mutex_lock_interruptible(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) state->mutex_acquired = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) return ERR_PTR(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) state->mutex_acquired = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) return seq_list_start(&input_dev_list, *pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) return seq_list_next(v, &input_dev_list, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) static void input_seq_stop(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) union input_seq_state *state = (union input_seq_state *)&seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) if (state->mutex_acquired)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) mutex_unlock(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) static void input_seq_print_bitmap(struct seq_file *seq, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) unsigned long *bitmap, int max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) bool skip_empty = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) char buf[18];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) seq_printf(seq, "B: %s=", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) if (input_bits_to_string(buf, sizeof(buf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) bitmap[i], skip_empty)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) skip_empty = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) seq_printf(seq, "%s%s", buf, i > 0 ? " " : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) * If no output was produced print a single 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) if (skip_empty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) seq_putc(seq, '0');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) seq_putc(seq, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) static int input_devices_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) struct input_dev *dev = container_of(v, struct input_dev, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) struct input_handle *handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) seq_printf(seq, "S: Sysfs=%s\n", path ? path : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) seq_puts(seq, "H: Handlers=");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) list_for_each_entry(handle, &dev->h_list, d_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) seq_printf(seq, "%s ", handle->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) seq_putc(seq, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) input_seq_print_bitmap(seq, "PROP", dev->propbit, INPUT_PROP_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) if (test_bit(EV_KEY, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) if (test_bit(EV_REL, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) if (test_bit(EV_ABS, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) if (test_bit(EV_MSC, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) if (test_bit(EV_LED, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) if (test_bit(EV_SND, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) if (test_bit(EV_FF, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) if (test_bit(EV_SW, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) seq_putc(seq, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) kfree(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) static const struct seq_operations input_devices_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) .start = input_devices_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) .next = input_devices_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) .stop = input_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) .show = input_devices_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) static int input_proc_devices_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) return seq_open(file, &input_devices_seq_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) static const struct proc_ops input_devices_proc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) .proc_open = input_proc_devices_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) .proc_poll = input_proc_devices_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) .proc_read = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) .proc_lseek = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) .proc_release = seq_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) union input_seq_state *state = (union input_seq_state *)&seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) /* We need to fit into seq->private pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) error = mutex_lock_interruptible(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) state->mutex_acquired = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) return ERR_PTR(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) state->mutex_acquired = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) state->pos = *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) return seq_list_start(&input_handler_list, *pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) union input_seq_state *state = (union input_seq_state *)&seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) state->pos = *pos + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) return seq_list_next(v, &input_handler_list, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) static int input_handlers_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) struct input_handler *handler = container_of(v, struct input_handler, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) union input_seq_state *state = (union input_seq_state *)&seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) if (handler->filter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) seq_puts(seq, " (filter)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) if (handler->legacy_minors)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) seq_printf(seq, " Minor=%d", handler->minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) seq_putc(seq, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) static const struct seq_operations input_handlers_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) .start = input_handlers_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) .next = input_handlers_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) .stop = input_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) .show = input_handlers_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) static int input_proc_handlers_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) return seq_open(file, &input_handlers_seq_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) static const struct proc_ops input_handlers_proc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) .proc_open = input_proc_handlers_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) .proc_read = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) .proc_lseek = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) .proc_release = seq_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) static int __init input_proc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) struct proc_dir_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) proc_bus_input_dir = proc_mkdir("bus/input", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) if (!proc_bus_input_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) entry = proc_create("devices", 0, proc_bus_input_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) &input_devices_proc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) if (!entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) goto fail1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) entry = proc_create("handlers", 0, proc_bus_input_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) &input_handlers_proc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) if (!entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) goto fail2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) fail2: remove_proc_entry("devices", proc_bus_input_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) fail1: remove_proc_entry("bus/input", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) static void input_proc_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) remove_proc_entry("devices", proc_bus_input_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) remove_proc_entry("handlers", proc_bus_input_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) remove_proc_entry("bus/input", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) #else /* !CONFIG_PROC_FS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) static inline void input_wakeup_procfs_readers(void) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) static inline int input_proc_init(void) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) static inline void input_proc_exit(void) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) #define INPUT_DEV_STRING_ATTR_SHOW(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) static ssize_t input_dev_show_##name(struct device *dev, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) struct device_attribute *attr, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) struct input_dev *input_dev = to_input_dev(dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) return scnprintf(buf, PAGE_SIZE, "%s\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) input_dev->name ? input_dev->name : ""); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) static DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) INPUT_DEV_STRING_ATTR_SHOW(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) INPUT_DEV_STRING_ATTR_SHOW(phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) INPUT_DEV_STRING_ATTR_SHOW(uniq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) static int input_print_modalias_bits(char *buf, int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) char name, unsigned long *bm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) unsigned int min_bit, unsigned int max_bit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) int len = 0, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) len += snprintf(buf, max(size, 0), "%c", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) for (i = min_bit; i < max_bit; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) if (bm[BIT_WORD(i)] & BIT_MASK(i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) len += snprintf(buf + len, max(size - len, 0), "%X,", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) static int input_print_modalias(char *buf, int size, struct input_dev *id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) int add_cr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) len = snprintf(buf, max(size, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) "input:b%04Xv%04Xp%04Xe%04X-",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) id->id.bustype, id->id.vendor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) id->id.product, id->id.version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) 'e', id->evbit, 0, EV_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) 'r', id->relbit, 0, REL_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) 'a', id->absbit, 0, ABS_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) 'm', id->mscbit, 0, MSC_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) 'l', id->ledbit, 0, LED_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) 's', id->sndbit, 0, SND_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) 'f', id->ffbit, 0, FF_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) len += input_print_modalias_bits(buf + len, size - len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) 'w', id->swbit, 0, SW_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) if (add_cr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) len += snprintf(buf + len, max(size - len, 0), "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) static ssize_t input_dev_show_modalias(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) struct input_dev *id = to_input_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) ssize_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) len = input_print_modalias(buf, PAGE_SIZE, id, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) return min_t(int, len, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) static DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) int max, int add_cr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) static ssize_t input_dev_show_properties(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) struct input_dev *input_dev = to_input_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) int len = input_print_bitmap(buf, PAGE_SIZE, input_dev->propbit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) INPUT_PROP_MAX, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) return min_t(int, len, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) static DEVICE_ATTR(properties, S_IRUGO, input_dev_show_properties, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) static struct attribute *input_dev_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) &dev_attr_name.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) &dev_attr_phys.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) &dev_attr_uniq.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) &dev_attr_modalias.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) &dev_attr_properties.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) static const struct attribute_group input_dev_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) .attrs = input_dev_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) #define INPUT_DEV_ID_ATTR(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) static ssize_t input_dev_show_id_##name(struct device *dev, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) struct device_attribute *attr, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) struct input_dev *input_dev = to_input_dev(dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) static DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) INPUT_DEV_ID_ATTR(bustype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) INPUT_DEV_ID_ATTR(vendor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) INPUT_DEV_ID_ATTR(product);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) INPUT_DEV_ID_ATTR(version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) static struct attribute *input_dev_id_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) &dev_attr_bustype.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) &dev_attr_vendor.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) &dev_attr_product.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) &dev_attr_version.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) static const struct attribute_group input_dev_id_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) .name = "id",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) .attrs = input_dev_id_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) int max, int add_cr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) int len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) bool skip_empty = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) len += input_bits_to_string(buf + len, max(buf_size - len, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) bitmap[i], skip_empty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) if (len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) skip_empty = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) if (i > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) len += snprintf(buf + len, max(buf_size - len, 0), " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) * If no output was produced print a single 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) if (len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) len = snprintf(buf, buf_size, "%d", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) if (add_cr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) len += snprintf(buf + len, max(buf_size - len, 0), "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) #define INPUT_DEV_CAP_ATTR(ev, bm) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) static ssize_t input_dev_show_cap_##bm(struct device *dev, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) struct device_attribute *attr, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) char *buf) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) struct input_dev *input_dev = to_input_dev(dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) int len = input_print_bitmap(buf, PAGE_SIZE, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) input_dev->bm##bit, ev##_MAX, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) true); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) return min_t(int, len, PAGE_SIZE); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) static DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) INPUT_DEV_CAP_ATTR(EV, ev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) INPUT_DEV_CAP_ATTR(KEY, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) INPUT_DEV_CAP_ATTR(REL, rel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) INPUT_DEV_CAP_ATTR(ABS, abs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) INPUT_DEV_CAP_ATTR(MSC, msc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) INPUT_DEV_CAP_ATTR(LED, led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) INPUT_DEV_CAP_ATTR(SND, snd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) INPUT_DEV_CAP_ATTR(FF, ff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) INPUT_DEV_CAP_ATTR(SW, sw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) static struct attribute *input_dev_caps_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) &dev_attr_ev.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) &dev_attr_key.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) &dev_attr_rel.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) &dev_attr_abs.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) &dev_attr_msc.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) &dev_attr_led.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) &dev_attr_snd.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) &dev_attr_ff.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) &dev_attr_sw.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) static const struct attribute_group input_dev_caps_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) .name = "capabilities",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) .attrs = input_dev_caps_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) static const struct attribute_group *input_dev_attr_groups[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) &input_dev_attr_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) &input_dev_id_attr_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) &input_dev_caps_attr_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) &input_poller_attribute_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) static void input_dev_release(struct device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) struct input_dev *dev = to_input_dev(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) input_ff_destroy(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) input_mt_destroy_slots(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) kfree(dev->poller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) kfree(dev->absinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) kfree(dev->vals);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) kfree(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) module_put(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) * Input uevent interface - loading event handlers based on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) * device bitfields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) static int input_add_uevent_bm_var(struct kobj_uevent_env *env,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) const char *name, unsigned long *bitmap, int max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) if (add_uevent_var(env, "%s", name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) len = input_print_bitmap(&env->buf[env->buflen - 1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) sizeof(env->buf) - env->buflen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) bitmap, max, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) if (len >= (sizeof(env->buf) - env->buflen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) env->buflen += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) static int input_add_uevent_modalias_var(struct kobj_uevent_env *env,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) if (add_uevent_var(env, "MODALIAS="))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) len = input_print_modalias(&env->buf[env->buflen - 1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) sizeof(env->buf) - env->buflen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) if (len >= (sizeof(env->buf) - env->buflen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) env->buflen += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) int err = add_uevent_var(env, fmt, val); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) if (err) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) return err; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) int err = input_add_uevent_bm_var(env, name, bm, max); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) if (err) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) return err; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) int err = input_add_uevent_modalias_var(env, dev); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) if (err) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) return err; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) struct input_dev *dev = to_input_dev(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) dev->id.bustype, dev->id.vendor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) dev->id.product, dev->id.version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) if (dev->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) if (dev->phys)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) if (dev->uniq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) INPUT_ADD_HOTPLUG_BM_VAR("PROP=", dev->propbit, INPUT_PROP_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) if (test_bit(EV_KEY, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) if (test_bit(EV_REL, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) if (test_bit(EV_ABS, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) if (test_bit(EV_MSC, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) if (test_bit(EV_LED, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) if (test_bit(EV_SND, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) if (test_bit(EV_FF, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) if (test_bit(EV_SW, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) #define INPUT_DO_TOGGLE(dev, type, bits, on) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) int i; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) bool active; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) if (!test_bit(EV_##type, dev->evbit)) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) break; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) for_each_set_bit(i, dev->bits##bit, type##_CNT) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) active = test_bit(i, dev->bits); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) if (!active && !on) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) continue; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) dev->event(dev, EV_##type, i, on ? active : 0); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) static void input_dev_toggle(struct input_dev *dev, bool activate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) if (!dev->event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) INPUT_DO_TOGGLE(dev, LED, led, activate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) INPUT_DO_TOGGLE(dev, SND, snd, activate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) if (activate && test_bit(EV_REP, dev->evbit)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) * input_reset_device() - reset/restore the state of input device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) * @dev: input device whose state needs to be reset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) * This function tries to reset the state of an opened input device and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) * bring internal state and state if the hardware in sync with each other.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) * We mark all keys as released, restore LED state, repeat rate, etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) void input_reset_device(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) mutex_lock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) spin_lock_irqsave(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) input_dev_toggle(dev, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) input_dev_release_keys(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) spin_unlock_irqrestore(&dev->event_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) EXPORT_SYMBOL(input_reset_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) static int input_dev_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) struct input_dev *input_dev = to_input_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) spin_lock_irq(&input_dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) * Keys that are pressed now are unlikely to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) * still pressed when we resume.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) input_dev_release_keys(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) /* Turn off LEDs and sounds, if any are active. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) input_dev_toggle(input_dev, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) spin_unlock_irq(&input_dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) static int input_dev_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) struct input_dev *input_dev = to_input_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) spin_lock_irq(&input_dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) /* Restore state of LEDs and sounds, if any were active. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) input_dev_toggle(input_dev, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) spin_unlock_irq(&input_dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) static int input_dev_freeze(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) struct input_dev *input_dev = to_input_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) spin_lock_irq(&input_dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) * Keys that are pressed now are unlikely to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) * still pressed when we resume.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) input_dev_release_keys(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) spin_unlock_irq(&input_dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) static int input_dev_poweroff(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) struct input_dev *input_dev = to_input_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) spin_lock_irq(&input_dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) /* Turn off LEDs and sounds, if any are active. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) input_dev_toggle(input_dev, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) spin_unlock_irq(&input_dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) static const struct dev_pm_ops input_dev_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) .suspend = input_dev_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) .resume = input_dev_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) .freeze = input_dev_freeze,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) .poweroff = input_dev_poweroff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) .restore = input_dev_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) #endif /* CONFIG_PM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) static const struct device_type input_dev_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) .groups = input_dev_attr_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) .release = input_dev_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) .uevent = input_dev_uevent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) .pm = &input_dev_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) static char *input_devnode(struct device *dev, umode_t *mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) return kasprintf(GFP_KERNEL, "input/%s", dev_name(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) struct class input_class = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) .name = "input",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) .devnode = input_devnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) EXPORT_SYMBOL_GPL(input_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) * input_allocate_device - allocate memory for new input device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) * Returns prepared struct input_dev or %NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) * NOTE: Use input_free_device() to free devices that have not been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) * registered; input_unregister_device() should be used for already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) * registered devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) struct input_dev *input_allocate_device(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) static atomic_t input_no = ATOMIC_INIT(-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) struct input_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) dev = kzalloc(sizeof(*dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) dev->dev.type = &input_dev_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) dev->dev.class = &input_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) device_initialize(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) mutex_init(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) spin_lock_init(&dev->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) timer_setup(&dev->timer, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) INIT_LIST_HEAD(&dev->h_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) INIT_LIST_HEAD(&dev->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) dev_set_name(&dev->dev, "input%lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) (unsigned long)atomic_inc_return(&input_no));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) __module_get(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) EXPORT_SYMBOL(input_allocate_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) struct input_devres {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) static int devm_input_device_match(struct device *dev, void *res, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) struct input_devres *devres = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) return devres->input == data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) static void devm_input_device_release(struct device *dev, void *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) struct input_devres *devres = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) struct input_dev *input = devres->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) dev_dbg(dev, "%s: dropping reference to %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) __func__, dev_name(&input->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) input_put_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) * devm_input_allocate_device - allocate managed input device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) * @dev: device owning the input device being created
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) * Returns prepared struct input_dev or %NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) * Managed input devices do not need to be explicitly unregistered or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) * freed as it will be done automatically when owner device unbinds from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) * its driver (or binding fails). Once managed input device is allocated,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) * it is ready to be set up and registered in the same fashion as regular
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) * input device. There are no special devm_input_device_[un]register()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) * variants, regular ones work with both managed and unmanaged devices,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) * should you need them. In most cases however, managed input device need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) * not be explicitly unregistered or freed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) * NOTE: the owner device is set up as parent of input device and users
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) * should not override it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) struct input_dev *devm_input_allocate_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) struct input_devres *devres;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) devres = devres_alloc(devm_input_device_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) sizeof(*devres), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) if (!devres)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) input = input_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) if (!input) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) devres_free(devres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) input->dev.parent = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) input->devres_managed = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) devres->input = input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) devres_add(dev, devres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) return input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) EXPORT_SYMBOL(devm_input_allocate_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) * input_free_device - free memory occupied by input_dev structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) * @dev: input device to free
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) * This function should only be used if input_register_device()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) * was not called yet or if it failed. Once device was registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) * use input_unregister_device() and memory will be freed once last
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) * reference to the device is dropped.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) * Device should be allocated by input_allocate_device().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) * NOTE: If there are references to the input device then memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) * will not be freed until last reference is dropped.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) void input_free_device(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) if (dev->devres_managed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) WARN_ON(devres_destroy(dev->dev.parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) devm_input_device_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) devm_input_device_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) input_put_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) EXPORT_SYMBOL(input_free_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) * input_set_timestamp - set timestamp for input events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) * @dev: input device to set timestamp for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) * @timestamp: the time at which the event has occurred
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) * in CLOCK_MONOTONIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) * This function is intended to provide to the input system a more
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) * accurate time of when an event actually occurred. The driver should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) * call this function as soon as a timestamp is acquired ensuring
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) * clock conversions in input_set_timestamp are done correctly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) * The system entering suspend state between timestamp acquisition and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) * calling input_set_timestamp can result in inaccurate conversions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) void input_set_timestamp(struct input_dev *dev, ktime_t timestamp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) dev->timestamp[INPUT_CLK_MONO] = timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) dev->timestamp[INPUT_CLK_REAL] = ktime_mono_to_real(timestamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) dev->timestamp[INPUT_CLK_BOOT] = ktime_mono_to_any(timestamp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) TK_OFFS_BOOT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) EXPORT_SYMBOL(input_set_timestamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) * input_get_timestamp - get timestamp for input events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) * @dev: input device to get timestamp from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) * A valid timestamp is a timestamp of non-zero value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) ktime_t *input_get_timestamp(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) const ktime_t invalid_timestamp = ktime_set(0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) if (!ktime_compare(dev->timestamp[INPUT_CLK_MONO], invalid_timestamp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) input_set_timestamp(dev, ktime_get());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) return dev->timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) EXPORT_SYMBOL(input_get_timestamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) * input_set_capability - mark device as capable of a certain event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) * @dev: device that is capable of emitting or accepting event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) * @type: type of the event (EV_KEY, EV_REL, etc...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) * @code: event code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) * In addition to setting up corresponding bit in appropriate capability
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) * bitmap the function also adjusts dev->evbit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) case EV_KEY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) __set_bit(code, dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) case EV_REL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) __set_bit(code, dev->relbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) case EV_ABS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) input_alloc_absinfo(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) if (!dev->absinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) __set_bit(code, dev->absbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) case EV_MSC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) __set_bit(code, dev->mscbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) case EV_SW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) __set_bit(code, dev->swbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) case EV_LED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) __set_bit(code, dev->ledbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) case EV_SND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) __set_bit(code, dev->sndbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) case EV_FF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) __set_bit(code, dev->ffbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) case EV_PWR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) /* do nothing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) pr_err("%s: unknown type %u (code %u)\n", __func__, type, code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) dump_stack();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) __set_bit(type, dev->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) EXPORT_SYMBOL(input_set_capability);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) static unsigned int input_estimate_events_per_packet(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) int mt_slots;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) unsigned int events;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) if (dev->mt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) mt_slots = dev->mt->num_slots;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) } else if (test_bit(ABS_MT_TRACKING_ID, dev->absbit)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) mt_slots = dev->absinfo[ABS_MT_TRACKING_ID].maximum -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) dev->absinfo[ABS_MT_TRACKING_ID].minimum + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) mt_slots = clamp(mt_slots, 2, 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) mt_slots = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) mt_slots = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) events = mt_slots + 1; /* count SYN_MT_REPORT and SYN_REPORT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) if (test_bit(EV_ABS, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) for_each_set_bit(i, dev->absbit, ABS_CNT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) events += input_is_mt_axis(i) ? mt_slots : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) if (test_bit(EV_REL, dev->evbit))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) events += bitmap_weight(dev->relbit, REL_CNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) /* Make room for KEY and MSC events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) events += 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) return events;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) #define INPUT_CLEANSE_BITMASK(dev, type, bits) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) if (!test_bit(EV_##type, dev->evbit)) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) memset(dev->bits##bit, 0, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) sizeof(dev->bits##bit)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) static void input_cleanse_bitmasks(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) INPUT_CLEANSE_BITMASK(dev, KEY, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) INPUT_CLEANSE_BITMASK(dev, REL, rel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) INPUT_CLEANSE_BITMASK(dev, ABS, abs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) INPUT_CLEANSE_BITMASK(dev, MSC, msc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) INPUT_CLEANSE_BITMASK(dev, LED, led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) INPUT_CLEANSE_BITMASK(dev, SND, snd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) INPUT_CLEANSE_BITMASK(dev, FF, ff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) INPUT_CLEANSE_BITMASK(dev, SW, sw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) static void __input_unregister_device(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) struct input_handle *handle, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) input_disconnect_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) mutex_lock(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) list_for_each_entry_safe(handle, next, &dev->h_list, d_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) handle->handler->disconnect(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) WARN_ON(!list_empty(&dev->h_list));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) del_timer_sync(&dev->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) list_del_init(&dev->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) input_wakeup_procfs_readers();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) mutex_unlock(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) device_del(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) static void devm_input_device_unregister(struct device *dev, void *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) struct input_devres *devres = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) struct input_dev *input = devres->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) dev_dbg(dev, "%s: unregistering device %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) __func__, dev_name(&input->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) __input_unregister_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) * input_enable_softrepeat - enable software autorepeat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) * @dev: input device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) * @delay: repeat delay
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) * @period: repeat period
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) * Enable software autorepeat on the input device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) void input_enable_softrepeat(struct input_dev *dev, int delay, int period)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) dev->timer.function = input_repeat_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) dev->rep[REP_DELAY] = delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) dev->rep[REP_PERIOD] = period;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) EXPORT_SYMBOL(input_enable_softrepeat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) * input_register_device - register device with input core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) * @dev: device to be registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) * This function registers device with input core. The device must be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) * allocated with input_allocate_device() and all it's capabilities
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) * set up before registering.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) * If function fails the device must be freed with input_free_device().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) * Once device has been successfully registered it can be unregistered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) * with input_unregister_device(); input_free_device() should not be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) * called in this case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) * Note that this function is also used to register managed input devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) * (ones allocated with devm_input_allocate_device()). Such managed input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) * devices need not be explicitly unregistered or freed, their tear down
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) * is controlled by the devres infrastructure. It is also worth noting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) * that tear down of managed input devices is internally a 2-step process:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) * registered managed input device is first unregistered, but stays in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) * memory and can still handle input_event() calls (although events will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) * not be delivered anywhere). The freeing of managed input device will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) * happen later, when devres stack is unwound to the point where device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) * allocation was made.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) int input_register_device(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) struct input_devres *devres = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) struct input_handler *handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) unsigned int packet_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) const char *path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) if (test_bit(EV_ABS, dev->evbit) && !dev->absinfo) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) dev_err(&dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) "Absolute device without dev->absinfo, refusing to register\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) if (dev->devres_managed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) devres = devres_alloc(devm_input_device_unregister,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) sizeof(*devres), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) if (!devres)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) devres->input = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) /* Every input device generates EV_SYN/SYN_REPORT events. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) __set_bit(EV_SYN, dev->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) /* KEY_RESERVED is not supposed to be transmitted to userspace. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) __clear_bit(KEY_RESERVED, dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) /* Make sure that bitmasks not mentioned in dev->evbit are clean. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) input_cleanse_bitmasks(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) packet_size = input_estimate_events_per_packet(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) if (dev->hint_events_per_packet < packet_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187) dev->hint_events_per_packet = packet_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) dev->max_vals = dev->hint_events_per_packet + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) dev->vals = kcalloc(dev->max_vals, sizeof(*dev->vals), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) if (!dev->vals) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193) goto err_devres_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197) * If delay and period are pre-set by the driver, then autorepeating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) * is handled by the driver itself and we don't do it in input.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) input_enable_softrepeat(dev, 250, 33);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) if (!dev->getkeycode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) dev->getkeycode = input_default_getkeycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206) if (!dev->setkeycode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207) dev->setkeycode = input_default_setkeycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) if (dev->poller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) input_dev_poller_finalize(dev->poller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) error = device_add(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) goto err_free_vals;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216) path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) pr_info("%s as %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) dev->name ? dev->name : "Unspecified device",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219) path ? path : "N/A");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) kfree(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222) error = mutex_lock_interruptible(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) goto err_device_del;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226) list_add_tail(&dev->node, &input_dev_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) list_for_each_entry(handler, &input_handler_list, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229) input_attach_handler(dev, handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) input_wakeup_procfs_readers();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) mutex_unlock(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235) if (dev->devres_managed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) dev_dbg(dev->dev.parent, "%s: registering %s with devres.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) __func__, dev_name(&dev->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238) devres_add(dev->dev.parent, devres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) err_device_del:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243) device_del(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) err_free_vals:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245) kfree(dev->vals);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) dev->vals = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247) err_devres_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) devres_free(devres);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) EXPORT_SYMBOL(input_register_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) * input_unregister_device - unregister previously registered device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) * @dev: device to be unregistered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) * This function unregisters an input device. Once device is unregistered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258) * the caller should not try to access it as it may get freed at any moment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) void input_unregister_device(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) if (dev->devres_managed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) WARN_ON(devres_destroy(dev->dev.parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) devm_input_device_unregister,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265) devm_input_device_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) __input_unregister_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) * We do not do input_put_device() here because it will be done
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270) * when 2nd devres fires up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273) __input_unregister_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) input_put_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) EXPORT_SYMBOL(input_unregister_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) * input_register_handler - register a new input handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281) * @handler: handler to be registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) * This function registers a new input handler (interface) for input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) * devices in the system and attaches it to all input devices that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285) * are compatible with the handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) int input_register_handler(struct input_handler *handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) struct input_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292) error = mutex_lock_interruptible(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) INIT_LIST_HEAD(&handler->h_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) list_add_tail(&handler->node, &input_handler_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) list_for_each_entry(dev, &input_dev_list, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) input_attach_handler(dev, handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) input_wakeup_procfs_readers();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305) mutex_unlock(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308) EXPORT_SYMBOL(input_register_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311) * input_unregister_handler - unregisters an input handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312) * @handler: handler to be unregistered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) * This function disconnects a handler from its input devices and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315) * removes it from lists of known handlers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) void input_unregister_handler(struct input_handler *handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319) struct input_handle *handle, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321) mutex_lock(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) list_for_each_entry_safe(handle, next, &handler->h_list, h_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324) handler->disconnect(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) WARN_ON(!list_empty(&handler->h_list));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327) list_del_init(&handler->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329) input_wakeup_procfs_readers();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2331) mutex_unlock(&input_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2333) EXPORT_SYMBOL(input_unregister_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2335) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2336) * input_handler_for_each_handle - handle iterator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2337) * @handler: input handler to iterate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2338) * @data: data for the callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2339) * @fn: function to be called for each handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2340) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2341) * Iterate over @bus's list of devices, and call @fn for each, passing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2342) * it @data and stop when @fn returns a non-zero value. The function is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2343) * using RCU to traverse the list and therefore may be using in atomic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2344) * contexts. The @fn callback is invoked from RCU critical section and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2345) * thus must not sleep.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2346) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2347) int input_handler_for_each_handle(struct input_handler *handler, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2348) int (*fn)(struct input_handle *, void *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2350) struct input_handle *handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2351) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2353) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2355) list_for_each_entry_rcu(handle, &handler->h_list, h_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2356) retval = fn(handle, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2357) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2358) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2361) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2363) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2365) EXPORT_SYMBOL(input_handler_for_each_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2367) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2368) * input_register_handle - register a new input handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2369) * @handle: handle to register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2370) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2371) * This function puts a new input handle onto device's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2372) * and handler's lists so that events can flow through
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2373) * it once it is opened using input_open_device().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2374) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2375) * This function is supposed to be called from handler's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2376) * connect() method.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2377) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2378) int input_register_handle(struct input_handle *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2380) struct input_handler *handler = handle->handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2381) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2382) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2384) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2385) * We take dev->mutex here to prevent race with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2386) * input_release_device().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2387) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2388) error = mutex_lock_interruptible(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2389) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2390) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2392) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2393) * Filters go to the head of the list, normal handlers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2394) * to the tail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2395) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2396) if (handler->filter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2397) list_add_rcu(&handle->d_node, &dev->h_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2398) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2399) list_add_tail_rcu(&handle->d_node, &dev->h_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2401) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2403) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2404) * Since we are supposed to be called from ->connect()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2405) * which is mutually exclusive with ->disconnect()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2406) * we can't be racing with input_unregister_handle()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2407) * and so separate lock is not needed here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2408) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2409) list_add_tail_rcu(&handle->h_node, &handler->h_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2411) if (handler->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2412) handler->start(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2414) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2416) EXPORT_SYMBOL(input_register_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2418) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2419) * input_unregister_handle - unregister an input handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2420) * @handle: handle to unregister
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2421) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2422) * This function removes input handle from device's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2423) * and handler's lists.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2424) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2425) * This function is supposed to be called from handler's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2426) * disconnect() method.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2427) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2428) void input_unregister_handle(struct input_handle *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2429) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2430) struct input_dev *dev = handle->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2432) list_del_rcu(&handle->h_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2434) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2435) * Take dev->mutex to prevent race with input_release_device().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2436) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2437) mutex_lock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2438) list_del_rcu(&handle->d_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2439) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2441) synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2443) EXPORT_SYMBOL(input_unregister_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2445) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2446) * input_get_new_minor - allocates a new input minor number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2447) * @legacy_base: beginning or the legacy range to be searched
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2448) * @legacy_num: size of legacy range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2449) * @allow_dynamic: whether we can also take ID from the dynamic range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2450) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2451) * This function allocates a new device minor for from input major namespace.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2452) * Caller can request legacy minor by specifying @legacy_base and @legacy_num
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2453) * parameters and whether ID can be allocated from dynamic range if there are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2454) * no free IDs in legacy range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2455) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2456) int input_get_new_minor(int legacy_base, unsigned int legacy_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2457) bool allow_dynamic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2459) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2460) * This function should be called from input handler's ->connect()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2461) * methods, which are serialized with input_mutex, so no additional
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2462) * locking is needed here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2463) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2464) if (legacy_base >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2465) int minor = ida_simple_get(&input_ida,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2466) legacy_base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2467) legacy_base + legacy_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2468) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2469) if (minor >= 0 || !allow_dynamic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2470) return minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2473) return ida_simple_get(&input_ida,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2474) INPUT_FIRST_DYNAMIC_DEV, INPUT_MAX_CHAR_DEVICES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2475) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2477) EXPORT_SYMBOL(input_get_new_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2479) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2480) * input_free_minor - release previously allocated minor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2481) * @minor: minor to be released
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2482) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2483) * This function releases previously allocated input minor so that it can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2484) * reused later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2485) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2486) void input_free_minor(unsigned int minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2487) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2488) ida_simple_remove(&input_ida, minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2490) EXPORT_SYMBOL(input_free_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2492) static int __init input_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2493) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2494) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2496) err = class_register(&input_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2497) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2498) pr_err("unable to register input_dev class\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2499) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2502) err = input_proc_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2503) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2504) goto fail1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2506) err = register_chrdev_region(MKDEV(INPUT_MAJOR, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2507) INPUT_MAX_CHAR_DEVICES, "input");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2508) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2509) pr_err("unable to register char major %d", INPUT_MAJOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2510) goto fail2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2513) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2515) fail2: input_proc_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2516) fail1: class_unregister(&input_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2517) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2520) static void __exit input_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2521) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2522) input_proc_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2523) unregister_chrdev_region(MKDEV(INPUT_MAJOR, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2524) INPUT_MAX_CHAR_DEVICES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2525) class_unregister(&input_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2528) subsys_initcall(input_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2529) module_exit(input_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags