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freebsd-dev/sys/dev/evdev/evdev.c
Vladimir Kondratyev dd3a67a078 Fix build when EVDEV_SUPPORT is option disabled after r344494 
MFC with:	344494
2019-02-24 19:31:42 +00:00

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/*-
* Copyright (c) 2014 Jakub Wojciech Klama <jceel@FreeBSD.org>
* Copyright (c) 2015-2016 Vladimir Kondratyev <wulf@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_evdev.h"
#include <sys/param.h>
#include <sys/bitstring.h>
#include <sys/conf.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <dev/evdev/evdev.h>
#include <dev/evdev/evdev_private.h>
#include <dev/evdev/input.h>
#ifdef EVDEV_DEBUG
#define debugf(evdev, fmt, args...) printf("evdev: " fmt "\n", ##args)
#else
#define debugf(evdev, fmt, args...)
#endif
#ifdef FEATURE
FEATURE(evdev, "Input event devices support");
#ifdef EVDEV_SUPPORT
FEATURE(evdev_support, "Evdev support in hybrid drivers");
#endif
#endif
enum evdev_sparse_result
{
EV_SKIP_EVENT, /* Event value not changed */
EV_REPORT_EVENT, /* Event value changed */
EV_REPORT_MT_SLOT, /* Event value and MT slot number changed */
};
MALLOC_DEFINE(M_EVDEV, "evdev", "evdev memory");
int evdev_rcpt_mask = EVDEV_RCPT_SYSMOUSE | EVDEV_RCPT_KBDMUX;
int evdev_sysmouse_t_axis = 0;
SYSCTL_NODE(_kern, OID_AUTO, evdev, CTLFLAG_RW, 0, "Evdev args");
#ifdef EVDEV_SUPPORT
SYSCTL_INT(_kern_evdev, OID_AUTO, rcpt_mask, CTLFLAG_RW, &evdev_rcpt_mask, 0,
"Who is receiving events: bit0 - sysmouse, bit1 - kbdmux, "
"bit2 - mouse hardware, bit3 - keyboard hardware");
SYSCTL_INT(_kern_evdev, OID_AUTO, sysmouse_t_axis, CTLFLAG_RW,
&evdev_sysmouse_t_axis, 0, "Extract T-axis from 0-none, 1-ums, 2-psm");
#endif
SYSCTL_NODE(_kern_evdev, OID_AUTO, input, CTLFLAG_RD, 0,
"Evdev input devices");
static void evdev_start_repeat(struct evdev_dev *, uint16_t);
static void evdev_stop_repeat(struct evdev_dev *);
static int evdev_check_event(struct evdev_dev *, uint16_t, uint16_t, int32_t);
static inline void
bit_change(bitstr_t *bitstr, int bit, int value)
{
if (value)
bit_set(bitstr, bit);
else
bit_clear(bitstr, bit);
}
struct evdev_dev *
evdev_alloc(void)
{
return malloc(sizeof(struct evdev_dev), M_EVDEV, M_WAITOK | M_ZERO);
}
void
evdev_free(struct evdev_dev *evdev)
{
if (evdev != NULL && evdev->ev_cdev != NULL &&
evdev->ev_cdev->si_drv1 != NULL)
evdev_unregister(evdev);
free(evdev, M_EVDEV);
}
static struct input_absinfo *
evdev_alloc_absinfo(void)
{
return (malloc(sizeof(struct input_absinfo) * ABS_CNT, M_EVDEV,
M_WAITOK | M_ZERO));
}
static void
evdev_free_absinfo(struct input_absinfo *absinfo)
{
free(absinfo, M_EVDEV);
}
int
evdev_set_report_size(struct evdev_dev *evdev, size_t report_size)
{
if (report_size > KEY_CNT + REL_CNT + ABS_CNT + MAX_MT_SLOTS * MT_CNT +
MSC_CNT + LED_CNT + SND_CNT + SW_CNT + FF_CNT)
return (EINVAL);
evdev->ev_report_size = report_size;
return (0);
}
static size_t
evdev_estimate_report_size(struct evdev_dev *evdev)
{
size_t size = 0;
int res;
/*
* Keyboards generate one event per report but other devices with
* buttons like mouses can report events simultaneously
*/
bit_ffs_at(evdev->ev_key_flags, KEY_OK, KEY_CNT - KEY_OK, &res);
if (res == -1)
bit_ffs(evdev->ev_key_flags, BTN_MISC, &res);
size += (res != -1);
bit_count(evdev->ev_key_flags, BTN_MISC, KEY_OK - BTN_MISC, &res);
size += res;
/* All relative axes can be reported simultaneously */
bit_count(evdev->ev_rel_flags, 0, REL_CNT, &res);
size += res;
/*
* All absolute axes can be reported simultaneously.
* Multitouch axes can be reported ABS_MT_SLOT times
*/
if (evdev->ev_absinfo != NULL) {
bit_count(evdev->ev_abs_flags, 0, ABS_CNT, &res);
size += res;
bit_count(evdev->ev_abs_flags, ABS_MT_FIRST, MT_CNT, &res);
if (res > 0) {
res++; /* ABS_MT_SLOT or SYN_MT_REPORT */
if (bit_test(evdev->ev_abs_flags, ABS_MT_SLOT))
/* MT type B */
size += res * MAXIMAL_MT_SLOT(evdev);
else
/* MT type A */
size += res * (MAX_MT_REPORTS - 1);
}
}
/* All misc events can be reported simultaneously */
bit_count(evdev->ev_msc_flags, 0, MSC_CNT, &res);
size += res;
/* All leds can be reported simultaneously */
bit_count(evdev->ev_led_flags, 0, LED_CNT, &res);
size += res;
/* Assume other events are generated once per report */
bit_ffs(evdev->ev_snd_flags, SND_CNT, &res);
size += (res != -1);
bit_ffs(evdev->ev_sw_flags, SW_CNT, &res);
size += (res != -1);
/* XXX: FF part is not implemented yet */
size++; /* SYN_REPORT */
return (size);
}
static void
evdev_sysctl_create(struct evdev_dev *evdev)
{
struct sysctl_oid *ev_sysctl_tree;
char ev_unit_str[8];
snprintf(ev_unit_str, sizeof(ev_unit_str), "%d", evdev->ev_unit);
sysctl_ctx_init(&evdev->ev_sysctl_ctx);
ev_sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&evdev->ev_sysctl_ctx,
SYSCTL_STATIC_CHILDREN(_kern_evdev_input), OID_AUTO,
ev_unit_str, CTLFLAG_RD, NULL, "", "device index");
SYSCTL_ADD_STRING(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "name", CTLFLAG_RD,
evdev->ev_name, 0,
"Input device name");
SYSCTL_ADD_STRUCT(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "id", CTLFLAG_RD,
&evdev->ev_id, input_id,
"Input device identification");
/* ioctl returns ENOENT if phys is not set. sysctl returns "" here */
SYSCTL_ADD_STRING(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "phys", CTLFLAG_RD,
evdev->ev_shortname, 0,
"Input device short name");
/* ioctl returns ENOENT if uniq is not set. sysctl returns "" here */
SYSCTL_ADD_STRING(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "uniq", CTLFLAG_RD,
evdev->ev_serial, 0,
"Input device unique number");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "props", CTLFLAG_RD,
evdev->ev_prop_flags, sizeof(evdev->ev_prop_flags), "",
"Input device properties");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "type_bits", CTLFLAG_RD,
evdev->ev_type_flags, sizeof(evdev->ev_type_flags), "",
"Input device supported events types");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "key_bits", CTLFLAG_RD,
evdev->ev_key_flags, sizeof(evdev->ev_key_flags),
"", "Input device supported keys");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "rel_bits", CTLFLAG_RD,
evdev->ev_rel_flags, sizeof(evdev->ev_rel_flags), "",
"Input device supported relative events");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "abs_bits", CTLFLAG_RD,
evdev->ev_abs_flags, sizeof(evdev->ev_abs_flags), "",
"Input device supported absolute events");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "msc_bits", CTLFLAG_RD,
evdev->ev_msc_flags, sizeof(evdev->ev_msc_flags), "",
"Input device supported miscellaneous events");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "led_bits", CTLFLAG_RD,
evdev->ev_led_flags, sizeof(evdev->ev_led_flags), "",
"Input device supported LED events");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "snd_bits", CTLFLAG_RD,
evdev->ev_snd_flags, sizeof(evdev->ev_snd_flags), "",
"Input device supported sound events");
SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx,
SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "sw_bits", CTLFLAG_RD,
evdev->ev_sw_flags, sizeof(evdev->ev_sw_flags), "",
"Input device supported switch events");
}
static int
evdev_register_common(struct evdev_dev *evdev)
{
int ret;
debugf(evdev, "%s: registered evdev provider: %s <%s>\n",
evdev->ev_shortname, evdev->ev_name, evdev->ev_serial);
/* Initialize internal structures */
LIST_INIT(&evdev->ev_clients);
if (evdev_event_supported(evdev, EV_REP) &&
bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) {
/* Initialize callout */
callout_init_mtx(&evdev->ev_rep_callout, &evdev->ev_mtx, 0);
if (evdev->ev_rep[REP_DELAY] == 0 &&
evdev->ev_rep[REP_PERIOD] == 0) {
/* Supply default values */
evdev->ev_rep[REP_DELAY] = 250;
evdev->ev_rep[REP_PERIOD] = 33;
}
}
/* Initialize multitouch protocol type B states */
if (bit_test(evdev->ev_abs_flags, ABS_MT_SLOT) &&
evdev->ev_absinfo != NULL && MAXIMAL_MT_SLOT(evdev) > 0)
evdev_mt_init(evdev);
/* Estimate maximum report size */
if (evdev->ev_report_size == 0) {
ret = evdev_set_report_size(evdev,
evdev_estimate_report_size(evdev));
if (ret != 0)
goto bail_out;
}
/* Create char device node */
ret = evdev_cdev_create(evdev);
if (ret != 0)
goto bail_out;
/* Create sysctls (for device enumeration without /dev/input access rights) */
evdev_sysctl_create(evdev);
bail_out:
return (ret);
}
int
evdev_register(struct evdev_dev *evdev)
{
int ret;
evdev->ev_lock_type = EV_LOCK_INTERNAL;
evdev->ev_lock = &evdev->ev_mtx;
mtx_init(&evdev->ev_mtx, "evmtx", NULL, MTX_DEF);
ret = evdev_register_common(evdev);
if (ret != 0)
mtx_destroy(&evdev->ev_mtx);
return (ret);
}
int
evdev_register_mtx(struct evdev_dev *evdev, struct mtx *mtx)
{
evdev->ev_lock_type = EV_LOCK_MTX;
evdev->ev_lock = mtx;
return (evdev_register_common(evdev));
}
int
evdev_unregister(struct evdev_dev *evdev)
{
struct evdev_client *client;
int ret;
debugf(evdev, "%s: unregistered evdev provider: %s\n",
evdev->ev_shortname, evdev->ev_name);
sysctl_ctx_free(&evdev->ev_sysctl_ctx);
EVDEV_LOCK(evdev);
evdev->ev_cdev->si_drv1 = NULL;
/* Wake up sleepers */
LIST_FOREACH(client, &evdev->ev_clients, ec_link) {
evdev_revoke_client(client);
evdev_dispose_client(evdev, client);
EVDEV_CLIENT_LOCKQ(client);
evdev_notify_event(client);
EVDEV_CLIENT_UNLOCKQ(client);
}
EVDEV_UNLOCK(evdev);
/* destroy_dev can sleep so release lock */
ret = evdev_cdev_destroy(evdev);
evdev->ev_cdev = NULL;
if (ret == 0 && evdev->ev_lock_type == EV_LOCK_INTERNAL)
mtx_destroy(&evdev->ev_mtx);
evdev_free_absinfo(evdev->ev_absinfo);
evdev_mt_free(evdev);
return (ret);
}
inline void
evdev_set_name(struct evdev_dev *evdev, const char *name)
{
snprintf(evdev->ev_name, NAMELEN, "%s", name);
}
inline void
evdev_set_id(struct evdev_dev *evdev, uint16_t bustype, uint16_t vendor,
uint16_t product, uint16_t version)
{
evdev->ev_id = (struct input_id) {
.bustype = bustype,
.vendor = vendor,
.product = product,
.version = version
};
}
inline void
evdev_set_phys(struct evdev_dev *evdev, const char *name)
{
snprintf(evdev->ev_shortname, NAMELEN, "%s", name);
}
inline void
evdev_set_serial(struct evdev_dev *evdev, const char *serial)
{
snprintf(evdev->ev_serial, NAMELEN, "%s", serial);
}
inline void
evdev_set_methods(struct evdev_dev *evdev, void *softc,
const struct evdev_methods *methods)
{
evdev->ev_methods = methods;
evdev->ev_softc = softc;
}
inline void *
evdev_get_softc(struct evdev_dev *evdev)
{
return (evdev->ev_softc);
}
inline void
evdev_support_prop(struct evdev_dev *evdev, uint16_t prop)
{
KASSERT(prop < INPUT_PROP_CNT, ("invalid evdev input property"));
bit_set(evdev->ev_prop_flags, prop);
}
inline void
evdev_support_event(struct evdev_dev *evdev, uint16_t type)
{
KASSERT(type < EV_CNT, ("invalid evdev event property"));
bit_set(evdev->ev_type_flags, type);
}
inline void
evdev_support_key(struct evdev_dev *evdev, uint16_t code)
{
KASSERT(code < KEY_CNT, ("invalid evdev key property"));
bit_set(evdev->ev_key_flags, code);
}
inline void
evdev_support_rel(struct evdev_dev *evdev, uint16_t code)
{
KASSERT(code < REL_CNT, ("invalid evdev rel property"));
bit_set(evdev->ev_rel_flags, code);
}
inline void
evdev_support_abs(struct evdev_dev *evdev, uint16_t code, int32_t value,
int32_t minimum, int32_t maximum, int32_t fuzz, int32_t flat,
int32_t resolution)
{
struct input_absinfo absinfo;
KASSERT(code < ABS_CNT, ("invalid evdev abs property"));
absinfo = (struct input_absinfo) {
.value = value,
.minimum = minimum,
.maximum = maximum,
.fuzz = fuzz,
.flat = flat,
.resolution = resolution,
};
evdev_set_abs_bit(evdev, code);
evdev_set_absinfo(evdev, code, &absinfo);
}
inline void
evdev_set_abs_bit(struct evdev_dev *evdev, uint16_t code)
{
KASSERT(code < ABS_CNT, ("invalid evdev abs property"));
if (evdev->ev_absinfo == NULL)
evdev->ev_absinfo = evdev_alloc_absinfo();
bit_set(evdev->ev_abs_flags, code);
}
inline void
evdev_support_msc(struct evdev_dev *evdev, uint16_t code)
{
KASSERT(code < MSC_CNT, ("invalid evdev msc property"));
bit_set(evdev->ev_msc_flags, code);
}
inline void
evdev_support_led(struct evdev_dev *evdev, uint16_t code)
{
KASSERT(code < LED_CNT, ("invalid evdev led property"));
bit_set(evdev->ev_led_flags, code);
}
inline void
evdev_support_snd(struct evdev_dev *evdev, uint16_t code)
{
KASSERT(code < SND_CNT, ("invalid evdev snd property"));
bit_set(evdev->ev_snd_flags, code);
}
inline void
evdev_support_sw(struct evdev_dev *evdev, uint16_t code)
{
KASSERT(code < SW_CNT, ("invalid evdev sw property"));
bit_set(evdev->ev_sw_flags, code);
}
bool
evdev_event_supported(struct evdev_dev *evdev, uint16_t type)
{
KASSERT(type < EV_CNT, ("invalid evdev event property"));
return (bit_test(evdev->ev_type_flags, type));
}
inline void
evdev_set_absinfo(struct evdev_dev *evdev, uint16_t axis,
struct input_absinfo *absinfo)
{
KASSERT(axis < ABS_CNT, ("invalid evdev abs property"));
if (axis == ABS_MT_SLOT &&
(absinfo->maximum < 1 || absinfo->maximum >= MAX_MT_SLOTS))
return;
if (evdev->ev_absinfo == NULL)
evdev->ev_absinfo = evdev_alloc_absinfo();
if (axis == ABS_MT_SLOT)
evdev->ev_absinfo[ABS_MT_SLOT].maximum = absinfo->maximum;
else
memcpy(&evdev->ev_absinfo[axis], absinfo,
sizeof(struct input_absinfo));
}
inline void
evdev_set_repeat_params(struct evdev_dev *evdev, uint16_t property, int value)
{
KASSERT(property < REP_CNT, ("invalid evdev repeat property"));
evdev->ev_rep[property] = value;
}
inline void
evdev_set_flag(struct evdev_dev *evdev, uint16_t flag)
{
KASSERT(flag < EVDEV_FLAG_CNT, ("invalid evdev flag property"));
bit_set(evdev->ev_flags, flag);
}
static int
evdev_check_event(struct evdev_dev *evdev, uint16_t type, uint16_t code,
int32_t value)
{
if (type >= EV_CNT)
return (EINVAL);
/* Allow SYN events implicitly */
if (type != EV_SYN && !evdev_event_supported(evdev, type))
return (EINVAL);
switch (type) {
case EV_SYN:
if (code >= SYN_CNT)
return (EINVAL);
break;
case EV_KEY:
if (code >= KEY_CNT)
return (EINVAL);
if (!bit_test(evdev->ev_key_flags, code))
return (EINVAL);
break;
case EV_REL:
if (code >= REL_CNT)
return (EINVAL);
if (!bit_test(evdev->ev_rel_flags, code))
return (EINVAL);
break;
case EV_ABS:
if (code >= ABS_CNT)
return (EINVAL);
if (!bit_test(evdev->ev_abs_flags, code))
return (EINVAL);
if (code == ABS_MT_SLOT &&
(value < 0 || value > MAXIMAL_MT_SLOT(evdev)))
return (EINVAL);
if (ABS_IS_MT(code) && evdev->ev_mt == NULL &&
bit_test(evdev->ev_abs_flags, ABS_MT_SLOT))
return (EINVAL);
break;
case EV_MSC:
if (code >= MSC_CNT)
return (EINVAL);
if (!bit_test(evdev->ev_msc_flags, code))
return (EINVAL);
break;
case EV_LED:
if (code >= LED_CNT)
return (EINVAL);
if (!bit_test(evdev->ev_led_flags, code))
return (EINVAL);
break;
case EV_SND:
if (code >= SND_CNT)
return (EINVAL);
if (!bit_test(evdev->ev_snd_flags, code))
return (EINVAL);
break;
case EV_SW:
if (code >= SW_CNT)
return (EINVAL);
if (!bit_test(evdev->ev_sw_flags, code))
return (EINVAL);
break;
case EV_REP:
if (code >= REP_CNT)
return (EINVAL);
break;
default:
return (EINVAL);
}
return (0);
}
static void
evdev_modify_event(struct evdev_dev *evdev, uint16_t type, uint16_t code,
int32_t *value)
{
EVDEV_LOCK_ASSERT(evdev);
switch (type) {
case EV_KEY:
if (!evdev_event_supported(evdev, EV_REP))
break;
if (!bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) {
/* Detect driver key repeats. */
if (bit_test(evdev->ev_key_states, code) &&
*value == KEY_EVENT_DOWN)
*value = KEY_EVENT_REPEAT;
} else {
/* Start/stop callout for evdev repeats */
if (bit_test(evdev->ev_key_states, code) == !*value &&
!LIST_EMPTY(&evdev->ev_clients)) {
if (*value == KEY_EVENT_DOWN)
evdev_start_repeat(evdev, code);
else
evdev_stop_repeat(evdev);
}
}
break;
case EV_ABS:
/* TBD: implement fuzz */
break;
}
}
static enum evdev_sparse_result
evdev_sparse_event(struct evdev_dev *evdev, uint16_t type, uint16_t code,
int32_t value)
{
int32_t last_mt_slot;
EVDEV_LOCK_ASSERT(evdev);
/*
* For certain event types, update device state bits
* and convert level reporting to edge reporting
*/
switch (type) {
case EV_KEY:
switch (value) {
case KEY_EVENT_UP:
case KEY_EVENT_DOWN:
if (bit_test(evdev->ev_key_states, code) == value)
return (EV_SKIP_EVENT);
bit_change(evdev->ev_key_states, code, value);
break;
case KEY_EVENT_REPEAT:
if (bit_test(evdev->ev_key_states, code) == 0 ||
!evdev_event_supported(evdev, EV_REP))
return (EV_SKIP_EVENT);
break;
default:
return (EV_SKIP_EVENT);
}
break;
case EV_LED:
if (bit_test(evdev->ev_led_states, code) == value)
return (EV_SKIP_EVENT);
bit_change(evdev->ev_led_states, code, value);
break;
case EV_SND:
bit_change(evdev->ev_snd_states, code, value);
break;
case EV_SW:
if (bit_test(evdev->ev_sw_states, code) == value)
return (EV_SKIP_EVENT);
bit_change(evdev->ev_sw_states, code, value);
break;
case EV_REP:
if (evdev->ev_rep[code] == value)
return (EV_SKIP_EVENT);
evdev_set_repeat_params(evdev, code, value);
break;
case EV_REL:
if (value == 0)
return (EV_SKIP_EVENT);
break;
/* For EV_ABS, save last value in absinfo and ev_mt_states */
case EV_ABS:
switch (code) {
case ABS_MT_SLOT:
/* Postpone ABS_MT_SLOT till next event */
evdev_set_last_mt_slot(evdev, value);
return (EV_SKIP_EVENT);
case ABS_MT_FIRST ... ABS_MT_LAST:
/* Pass MT protocol type A events as is */
if (!bit_test(evdev->ev_abs_flags, ABS_MT_SLOT))
break;
/* Don`t repeat MT protocol type B events */
last_mt_slot = evdev_get_last_mt_slot(evdev);
if (evdev_get_mt_value(evdev, last_mt_slot, code)
== value)
return (EV_SKIP_EVENT);
evdev_set_mt_value(evdev, last_mt_slot, code, value);
if (last_mt_slot != CURRENT_MT_SLOT(evdev)) {
CURRENT_MT_SLOT(evdev) = last_mt_slot;
evdev->ev_report_opened = true;
return (EV_REPORT_MT_SLOT);
}
break;
default:
if (evdev->ev_absinfo[code].value == value)
return (EV_SKIP_EVENT);
evdev->ev_absinfo[code].value = value;
}
break;
case EV_SYN:
if (code == SYN_REPORT) {
/* Count empty reports as well as non empty */
evdev->ev_report_count++;
/* Skip empty reports */
if (!evdev->ev_report_opened)
return (EV_SKIP_EVENT);
evdev->ev_report_opened = false;
return (EV_REPORT_EVENT);
}
break;
}
evdev->ev_report_opened = true;
return (EV_REPORT_EVENT);
}
static void
evdev_propagate_event(struct evdev_dev *evdev, uint16_t type, uint16_t code,
int32_t value)
{
struct evdev_client *client;
debugf(evdev, "%s pushed event %d/%d/%d",
evdev->ev_shortname, type, code, value);
EVDEV_LOCK_ASSERT(evdev);
/* Propagate event through all clients */
LIST_FOREACH(client, &evdev->ev_clients, ec_link) {
if (evdev->ev_grabber != NULL && evdev->ev_grabber != client)
continue;
EVDEV_CLIENT_LOCKQ(client);
evdev_client_push(client, type, code, value);
if (type == EV_SYN && code == SYN_REPORT)
evdev_notify_event(client);
EVDEV_CLIENT_UNLOCKQ(client);
}
evdev->ev_event_count++;
}
void
evdev_send_event(struct evdev_dev *evdev, uint16_t type, uint16_t code,
int32_t value)
{
enum evdev_sparse_result sparse;
EVDEV_LOCK_ASSERT(evdev);
sparse = evdev_sparse_event(evdev, type, code, value);
switch (sparse) {
case EV_REPORT_MT_SLOT:
/* report postponed ABS_MT_SLOT */
evdev_propagate_event(evdev, EV_ABS, ABS_MT_SLOT,
CURRENT_MT_SLOT(evdev));
/* FALLTHROUGH */
case EV_REPORT_EVENT:
evdev_propagate_event(evdev, type, code, value);
/* FALLTHROUGH */
case EV_SKIP_EVENT:
break;
}
}
void
evdev_restore_after_kdb(struct evdev_dev *evdev)
{
int code;
EVDEV_LOCK_ASSERT(evdev);
/* Report postponed leds */
for (code = 0; code < LED_CNT; code++)
if (bit_test(evdev->ev_kdb_led_states, code))
evdev_send_event(evdev, EV_LED, code,
!bit_test(evdev->ev_led_states, code));
bit_nclear(evdev->ev_kdb_led_states, 0, LED_MAX);
/* Release stuck keys (CTRL + ALT + ESC) */
evdev_stop_repeat(evdev);
for (code = 0; code < KEY_CNT; code++) {
if (bit_test(evdev->ev_key_states, code)) {
evdev_send_event(evdev, EV_KEY, code, KEY_EVENT_UP);
evdev_send_event(evdev, EV_SYN, SYN_REPORT, 1);
}
}
}
int
evdev_push_event(struct evdev_dev *evdev, uint16_t type, uint16_t code,
int32_t value)
{
if (evdev_check_event(evdev, type, code, value) != 0)
return (EINVAL);
/*
* Discard all but LEDs kdb events as unrelated to userspace.
* Aggregate LED updates and postpone reporting until kdb deactivation.
*/
if (kdb_active || SCHEDULER_STOPPED()) {
evdev->ev_kdb_active = true;
if (type == EV_LED)
bit_set(evdev->ev_kdb_led_states,
bit_test(evdev->ev_led_states, code) != value);
return (0);
}
EVDEV_ENTER(evdev);
/* Fix evdev state corrupted with discarding of kdb events */
if (evdev->ev_kdb_active) {
evdev->ev_kdb_active = false;
evdev_restore_after_kdb(evdev);
}
evdev_modify_event(evdev, type, code, &value);
if (type == EV_SYN && code == SYN_REPORT &&
bit_test(evdev->ev_flags, EVDEV_FLAG_MT_AUTOREL))
evdev_send_mt_autorel(evdev);
if (type == EV_SYN && code == SYN_REPORT && evdev->ev_report_opened &&
bit_test(evdev->ev_flags, EVDEV_FLAG_MT_STCOMPAT))
evdev_send_mt_compat(evdev);
evdev_send_event(evdev, type, code, value);
EVDEV_EXIT(evdev);
return (0);
}
int
evdev_inject_event(struct evdev_dev *evdev, uint16_t type, uint16_t code,
int32_t value)
{
int ret = 0;
switch (type) {
case EV_REP:
/* evdev repeats should not be processed by hardware driver */
if (bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT))
goto push;
/* FALLTHROUGH */
case EV_LED:
case EV_MSC:
case EV_SND:
case EV_FF:
if (evdev->ev_methods != NULL &&
evdev->ev_methods->ev_event != NULL)
evdev->ev_methods->ev_event(evdev, type, code, value);
/*
* Leds and driver repeats should be reported in ev_event
* method body to interoperate with kbdmux states and rates
* propagation so both ways (ioctl and evdev) of changing it
* will produce only one evdev event report to client.
*/
if (type == EV_LED || type == EV_REP)
break;
/* FALLTHROUGH */
case EV_SYN:
case EV_KEY:
case EV_REL:
case EV_ABS:
case EV_SW:
push:
if (evdev->ev_lock_type != EV_LOCK_INTERNAL)
EVDEV_LOCK(evdev);
ret = evdev_push_event(evdev, type, code, value);
if (evdev->ev_lock_type != EV_LOCK_INTERNAL)
EVDEV_UNLOCK(evdev);
break;
default:
ret = EINVAL;
}
return (ret);
}
int
evdev_register_client(struct evdev_dev *evdev, struct evdev_client *client)
{
int ret = 0;
debugf(evdev, "adding new client for device %s", evdev->ev_shortname);
EVDEV_LOCK_ASSERT(evdev);
if (LIST_EMPTY(&evdev->ev_clients) && evdev->ev_methods != NULL &&
evdev->ev_methods->ev_open != NULL) {
debugf(evdev, "calling ev_open() on device %s",
evdev->ev_shortname);
ret = evdev->ev_methods->ev_open(evdev);
}
if (ret == 0)
LIST_INSERT_HEAD(&evdev->ev_clients, client, ec_link);
return (ret);
}
void
evdev_dispose_client(struct evdev_dev *evdev, struct evdev_client *client)
{
debugf(evdev, "removing client for device %s", evdev->ev_shortname);
EVDEV_LOCK_ASSERT(evdev);
LIST_REMOVE(client, ec_link);
if (LIST_EMPTY(&evdev->ev_clients)) {
if (evdev->ev_methods != NULL &&
evdev->ev_methods->ev_close != NULL)
(void)evdev->ev_methods->ev_close(evdev);
if (evdev_event_supported(evdev, EV_REP) &&
bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT))
evdev_stop_repeat(evdev);
}
evdev_release_client(evdev, client);
}
int
evdev_grab_client(struct evdev_dev *evdev, struct evdev_client *client)
{
EVDEV_LOCK_ASSERT(evdev);
if (evdev->ev_grabber != NULL)
return (EBUSY);
evdev->ev_grabber = client;
return (0);
}
int
evdev_release_client(struct evdev_dev *evdev, struct evdev_client *client)
{
EVDEV_LOCK_ASSERT(evdev);
if (evdev->ev_grabber != client)
return (EINVAL);
evdev->ev_grabber = NULL;
return (0);
}
static void
evdev_repeat_callout(void *arg)
{
struct evdev_dev *evdev = (struct evdev_dev *)arg;
evdev_send_event(evdev, EV_KEY, evdev->ev_rep_key, KEY_EVENT_REPEAT);
evdev_send_event(evdev, EV_SYN, SYN_REPORT, 1);
if (evdev->ev_rep[REP_PERIOD])
callout_reset(&evdev->ev_rep_callout,
evdev->ev_rep[REP_PERIOD] * hz / 1000,
evdev_repeat_callout, evdev);
else
evdev->ev_rep_key = KEY_RESERVED;
}
static void
evdev_start_repeat(struct evdev_dev *evdev, uint16_t key)
{
EVDEV_LOCK_ASSERT(evdev);
if (evdev->ev_rep[REP_DELAY]) {
evdev->ev_rep_key = key;
callout_reset(&evdev->ev_rep_callout,
evdev->ev_rep[REP_DELAY] * hz / 1000,
evdev_repeat_callout, evdev);
}
}
static void
evdev_stop_repeat(struct evdev_dev *evdev)
{
EVDEV_LOCK_ASSERT(evdev);
if (evdev->ev_rep_key != KEY_RESERVED) {
callout_stop(&evdev->ev_rep_callout);
evdev->ev_rep_key = KEY_RESERVED;
}
}
MODULE_VERSION(evdev, 1);
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