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event-input.c
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/**
* @file event-input.c
* /dev/input event provider for the Mode Control Entity
* <p>
* Copyright (c) 2004 - 2011 Nokia Corporation and/or its subsidiary(-ies).
* Copyright (c) 2013 - 2020 Jolla Ltd.
* Copyright (c) 2020 Open Mobile Platform LLC.
* <p>
* @author David Weinehall <[email protected]>
* @author Ismo Laitinen <[email protected]>
* @author Tapio Rantala <[email protected]>
* @author Santtu Lakkala <[email protected]>
* @author Jukka Turunen <[email protected]>
* @author Mika Laitio <[email protected]>
* @author Robin Burchell <[email protected]>
* @author Simo Piiroinen <[email protected]>
*
* mce is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* mce is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mce. If not, see <http://www.gnu.org/licenses/>.
*/
#include "event-input.h"
#include "mce.h"
#include "mce-log.h"
#include "mce-io.h"
#include "mce-lib.h"
#include "mce-conf.h"
#include "mce-dbus.h"
#ifdef ENABLE_DOUBLETAP_EMULATION
# include "mce-setting.h"
#endif
#include "mce-sensorfw.h"
#include "mce-wakelock.h"
#include "multitouch.h"
#include "evdev.h"
#include <mce/dbus-names.h>
#include <mce/mode-names.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <glib/gstdio.h>
#include <gio/gio.h>
/* ========================================================================= *
* CONSTANTS
* ========================================================================= */
#ifndef SW_CAMERA_LENS_COVER
/** Input layer code for the camera lens cover switch */
# define SW_CAMERA_LENS_COVER 0x09
#endif
#ifndef SW_KEYPAD_SLIDE
/** Input layer code for the keypad slide switch */
# define SW_KEYPAD_SLIDE 0x0a
#endif
#ifndef SW_FRONT_PROXIMITY
/** Input layer code for the front proximity sensor switch */
# define SW_FRONT_PROXIMITY 0x0b
#endif
#ifndef KEY_CAMERA_FOCUS
/** Input layer code for the camera focus button */
# define KEY_CAMERA_FOCUS 0x0210
#endif
#ifndef FF_STATUS_CNT
# ifdef FF_STATUS_MAX
# define FF_STATUS_CNT (FF_STATUS_MAX+1)
# else
# define FF_STATUS_CNT 0
# endif
#endif
#ifndef PWR_CNT
# ifdef PWR_MAX
# define PWR_CNT (PWR_MAX+1)
# else
# define PWR_CNT 0
# endif
#endif
/** How long to block suspend after receiwing KEY_WAKEUP event */
#define WAKEUP_EVENT_TIMEOUT_MS 10000
/** Wakelock used for blocking suspend after receiving KEY_WAKEUP event */
#define WAKEUP_EVENT_WAKELOCK_NAME "wakeup-event"
/* ========================================================================= *
* DATA TYPES AND FUNCTION PROTOTYPES
* ========================================================================= */
/* ------------------------------------------------------------------------- *
* GPIO_KEYS -- N900 camera focus key enable/disable policy
* ------------------------------------------------------------------------- */
static void evin_gpio_init (void);
static void evin_gpio_key_enable (unsigned key);
static void evin_gpio_key_disable (unsigned key);
/* ------------------------------------------------------------------------- *
* EVENT_MAPPING -- translate EV_SW events kernel sends to what mce expects
* ------------------------------------------------------------------------- */
/** Structure for holding evdev event translation data
*/
typedef struct
{
/** Event that kernel is emitting */
struct input_event em_kernel_emits;
/** Event mce is expecting to see */
struct input_event em_mce_expects;
} evin_event_mapping_t;
static int evin_event_mapping_guess_event_type (const char *event_code_name);
static int evin_event_mapping_parse_number (const char *text);
static bool evin_event_mapping_parse_event (struct input_event *ev, const char *event_code_name);
static bool evin_event_mapping_parse_config (evin_event_mapping_t *self, const char *kernel_emits, const char *mce_expects);
static bool evin_event_mapping_apply (const evin_event_mapping_t *self, struct input_event *ev);
static int evin_event_mapper_rlookup_switch (int expected_by_mce);
static void evin_event_mapper_translate_event (struct input_event *ev);
static void evin_event_mapper_init (void);
static void evin_event_mapper_quit (void);
/* ------------------------------------------------------------------------- *
* EVDEVBITS
* ------------------------------------------------------------------------- */
/** Calculate how many elements an array of longs bitmap needs to
* have enough space for bc items */
#define EVIN_EVDEVBITS_LEN(bc) (((bc)+LONG_BIT-1)/LONG_BIT)
/** Supported codes for one evdev event type
*/
typedef struct
{
/** event type */
int type;
/** event code count for this type */
int cnt;
/** bitmask of supported event codes */
unsigned long bit[0];
} evin_evdevbits_t;
static evin_evdevbits_t *evin_evdevbits_create (int type);
static void evin_evdevbits_delete (evin_evdevbits_t *self);
static int evin_evdevbits_probe (evin_evdevbits_t *self, int fd);
static void evin_evdevbits_clear (evin_evdevbits_t *self);
static int evin_evdevbits_test (const evin_evdevbits_t *self, int bit);
/* ------------------------------------------------------------------------- *
* EVDEVINFO
* ------------------------------------------------------------------------- */
/** Supported event types and codes for an evdev device node
*/
typedef struct
{
/** Array of bitmasks for supported event types */
evin_evdevbits_t *mask[EV_CNT];
} evin_evdevinfo_t;
static int evin_evdevinfo_list_has_entry (const int *list, int entry);
static evin_evdevinfo_t *evin_evdevinfo_create (void);
static void evin_evdevinfo_delete (evin_evdevinfo_t *self);
static int evin_evdevinfo_probe (evin_evdevinfo_t *self, int fd);
static int evin_evdevinfo_has_type (const evin_evdevinfo_t *self, int type);
static int evin_evdevinfo_has_types (const evin_evdevinfo_t *self, const int *types);
static int evin_evdevinfo_has_code (const evin_evdevinfo_t *self, int type, int code);
static int evin_evdevinfo_has_codes (const evin_evdevinfo_t *self, int type, const int *codes);
static int evin_evdevinfo_match_types_ex (const evin_evdevinfo_t *self, const int *types_req, const int *types_ign);
static int evin_evdevinfo_match_types (const evin_evdevinfo_t *self, const int *types);
static int evin_evdevinfo_match_codes_ex (const evin_evdevinfo_t *self, int type, const int *codes, const int *codes_ign);
static int evin_evdevinfo_match_codes (const evin_evdevinfo_t *self, int type, const int *codes);
static bool evin_evdevinfo_is_volumekey_default (const evin_evdevinfo_t *self);
static bool evin_evdevinfo_is_volumekey_hammerhead (const evin_evdevinfo_t *self);
static bool evin_evdevinfo_is_volumekey (const evin_evdevinfo_t *self);
static bool evin_evdevinfo_is_keyboard (const evin_evdevinfo_t *self);
/* ------------------------------------------------------------------------- *
* EVDEVTYPE
* ------------------------------------------------------------------------- */
/** Types of use MCE can have for evdev input devices
*/
typedef enum {
/** Sensors that might look like touch but should be ignored */
EVDEV_REJECT,
/** Touch screen to be tracked and processed */
EVDEV_TOUCH,
/** Mouse to be tracked and processed */
EVDEV_MOUSE,
/** Keys etc that mce needs to track and process */
EVDEV_INPUT,
/** Keys etc that mce itself does not need, tracked only for
* detecting user activity */
EVDEV_ACTIVITY,
/** The rest, mce does not track these */
EVDEV_IGNORE,
/** Button like touch device */
EVDEV_DBLTAP,
/** Proximity sensor */
EVDEV_PS,
/** Ambient light sensor */
EVDEV_ALS,
/** Volume key device */
EVDEV_VOLKEY,
/** Keyboard device */
EVDEV_KEYBOARD,
/** Device type was not explicitly set in configuration */
EVDEV_UNKNOWN,
} evin_evdevtype_t;
static const char *evin_evdevtype_repr (evin_evdevtype_t type);
static evin_evdevtype_t evin_evdevtype_parse (const char *name);
static evin_evdevtype_t evin_evdevtype_from_info (evin_evdevinfo_t *info);
/* ------------------------------------------------------------------------- *
* DOUBLETAP_EMULATION
* ------------------------------------------------------------------------- */
#ifdef ENABLE_DOUBLETAP_EMULATION
static void evin_doubletap_setting_cb (GConfClient *const client, const guint id, GConfEntry *const entry, gpointer const data);
#endif // ENABLE_DOUBLETAP_EMULATION
/* ------------------------------------------------------------------------- *
* INI_FILE_HELPERS
* ------------------------------------------------------------------------- */
static bool evio_is_valid_key_char(int ch);
static char *evio_sanitize_key_name(const char *name);
/* ------------------------------------------------------------------------- *
* EVDEV_IO_MONITORING
* ------------------------------------------------------------------------- */
/** Cached capabilities and type of monitored evdev input device */
typedef struct
{
/** Device name as reported by the driver */
char *ex_name;
/** Cached device node capabilities */
evin_evdevinfo_t *ex_info;
/** Device type from mce point of view */
evin_evdevtype_t ex_type;
/** Name of device that provides keypad slide state*/
gchar *ex_sw_keypad_slide;
/** State data for multitouch/mouse input devices */
mt_state_t *ex_mt_state;
} evin_iomon_extra_t;
static void evin_iomon_extra_delete_cb (void *aptr);
static evin_iomon_extra_t *evin_iomon_extra_create (int fd, const char *name);
// common rate limited activity generation
static void evin_iomon_generate_activity (struct input_event *ev, bool cooked, bool raw);
// event handling by device type
static bool evin_iomon_sw_gestures_allowed (void);
static void evin_iomon_user_feedback (struct input_event *ev);
static gboolean evin_iomon_touchscreen_cb (mce_io_mon_t *iomon, gpointer data, gsize bytes_read);
static gboolean evin_iomon_evin_doubletap_cb (mce_io_mon_t *iomon, gpointer data, gsize bytes_read);
static gboolean evin_iomon_keypress_cb (mce_io_mon_t *iomon, gpointer data, gsize bytes_read);
static gboolean evin_iomon_activity_cb (mce_io_mon_t *iomon, gpointer data, gsize bytes_read);
// add/remove devices
static void evin_iomon_device_delete_cb (mce_io_mon_t *iomon);
static void evin_iomon_device_rem_all (void);
static void evin_iomon_device_add (const gchar *path);
static void evin_iomon_device_update (const gchar *path, gboolean add);
static mce_io_mon_t*evin_iomon_lookup_device (const char *name);
static void evin_iomon_device_iterate (evin_evdevtype_t type, GFunc func, gpointer data);
// check initial switch event states
static void evin_iomon_switch_states_update_iter_cb (gpointer io_monitor, gpointer user_data);
static void evin_iomon_switch_states_update (void);
static void evin_iomon_keyboard_state_update_iter_cb (gpointer io_monitor, gpointer user_data);
static void evin_iomon_keyboard_state_update (void);
static void evin_iomon_mouse_state_update_iter_cb (gpointer io_monitor, gpointer user_data);
static void evin_iomon_mouse_state_update (void);
// start/stop io monitoring
static bool evin_iomon_init (void);
static void evin_iomon_quit (void);
/* ------------------------------------------------------------------------- *
* EVDEV_DIRECTORY_MONITORING
* ------------------------------------------------------------------------- */
static void evin_devdir_monitor_changed_cb (GFileMonitor *monitor, GFile *file, GFile *other_file, GFileMonitorEvent event_type, gpointer user_data);
static bool evin_devdir_monitor_init (void);
static void evin_devdir_monitor_quit (void);
/* ------------------------------------------------------------------------- *
* TOUCHSTATE_MONITORING
* ------------------------------------------------------------------------- */
static void evin_touchstate_iomon_iter_cb (gpointer data, gpointer user_data);
static gboolean evin_touchstate_update_cb (gpointer aptr);
static void evin_touchstate_cancel_update (void);
static void evin_touchstate_schedule_update (void);
/* ------------------------------------------------------------------------- *
* INPUT_GRAB -- GENERIC EVDEV INPUT GRAB STATE MACHINE
* ------------------------------------------------------------------------- */
/** Event input policy state */
typedef enum
{
/** Initial value */
EVIN_STATE_UNKNOWN = 0,
/** Input events can be processed normally */
EVIN_STATE_ENABLED = 1,
/** Input events should be ignored */
EVIN_STATE_DISABLED = 2,
} evin_state_t;
static const char *evin_state_repr(evin_state_t state);
static const char *evin_state_to_dbus(evin_state_t state);
typedef struct evin_input_grab_t evin_input_grab_t;
/** State information for generic input grabbing state machine */
struct evin_input_grab_t
{
/** State machine instance name */
const char *ig_name;
/** Current policy decision */
evin_state_t ig_state;
/** Currently touched/down */
bool ig_touching;
/** Was touched/down, delaying release */
bool ig_touched;
/** Input grab is wanted */
bool ig_want_grab;
/** Input grab is allowed */
bool ig_allow_grab;
/** Input grab should be active */
bool ig_have_grab;
/** Input grab is active */
bool ig_real_grab;
/** Delayed release timer */
guint ig_release_id;
/** Delayed release delay */
int ig_release_ms;
/** Callback for notifying grab status changes */
void (*ig_grab_changed_cb)(evin_input_grab_t *self, bool have_grab);
/** Callback for additional release polling */
bool (*ig_release_verify_cb)(evin_input_grab_t *self);
/** Callback for broadcasting policy changes */
void (*ig_state_changed_cb)(evin_input_grab_t *self);
};
static void evin_input_grab_reset (evin_input_grab_t *self);
static gboolean evin_input_grab_release_cb (gpointer aptr);
static void evin_input_grab_start_release_timer (evin_input_grab_t *self);
static void evin_input_grab_cancel_release_timer (evin_input_grab_t *self);
static void evin_input_grab_rethink (evin_input_grab_t *self);
static void evin_input_grab_set_touching (evin_input_grab_t *self, bool touching);
static void evin_input_grab_request_grab (evin_input_grab_t *self, bool want_grab);
static void evin_input_grab_allow_grab (evin_input_grab_t *self, bool allow_grab);
static void evin_input_grab_iomon_cb (gpointer data, gpointer user_data);
/* ------------------------------------------------------------------------- *
* TS_GRAB -- TOUCHSCREEN EVDEV INPUT GRAB STATE MACHINE
* ------------------------------------------------------------------------- */
static void evin_ts_grab_set_led_raw (bool enabled);
static gboolean evin_ts_grab_set_led_cb (gpointer aptr);
static void evin_ts_grab_set_led (bool enabled);
static void evin_ts_grab_rethink_led (void);
static void evin_ts_grab_set_active (gboolean grab);
static bool evin_ts_grab_poll_palm_detect (evin_input_grab_t *ctrl);
static void evin_ts_grab_changed (evin_input_grab_t *ctrl, bool grab);
static void evin_ts_policy_changed (evin_input_grab_t *ctrl);
static void evin_ts_grab_setting_cb (GConfClient *const client, const guint id, GConfEntry *const entry, gpointer const data);
static void evin_ts_grab_init (void);
static void evin_ts_grab_quit (void);
/* ------------------------------------------------------------------------- *
* KP_GRAB -- KEYPAD EVDEV INPUT GRAB STATE MACHINE
* ------------------------------------------------------------------------- */
static void evin_kp_grab_set_active (gboolean grab);
static void evin_kp_grab_changed (evin_input_grab_t *ctrl, bool grab);
static void evin_kp_policy_changed (evin_input_grab_t *ctrl);
static void evin_kp_grab_event_filter_cb (struct input_event *ev);
/* ------------------------------------------------------------------------- *
* DYNAMIC_SETTINGS
* ------------------------------------------------------------------------- */
static void evin_setting_input_grab_rethink (void);
static void evin_setting_cb (GConfClient *const gcc, const guint id, GConfEntry *const entry, gpointer const data);
static void evin_setting_init (void);
static void evin_setting_quit (void);
/* ------------------------------------------------------------------------- *
* DBUS_HOOKS
* ------------------------------------------------------------------------- */
static void evin_dbus_send_keypad_input_policy (DBusMessage *const req);
static gboolean evin_dbus_keypad_input_policy_get_req_cb(DBusMessage *const msg);
static void evin_dbus_send_touch_input_policy (DBusMessage *const req);
static gboolean evin_dbus_touch_input_policy_get_req_cb (DBusMessage *const msg);
static void evin_dbus_init (void);
static void evin_dbus_quit (void);
/* ------------------------------------------------------------------------- *
* EVIN_DATAPIPE
* ------------------------------------------------------------------------- */
static void evin_datapipe_submode_cb (gconstpointer data);
static void evin_datapipe_touch_grab_wanted_cb (gconstpointer data);
static void evin_datapipe_touch_detected_cb (gconstpointer data);
static void evin_datapipe_display_state_curr_cb (gconstpointer data);
static void evin_datapipe_keypad_grab_wanted_cb (gconstpointer data);
static void evin_datapipe_display_state_next_cb (gconstpointer data);
static void evin_datapipe_proximity_sensor_actual_cb(gconstpointer data);
static void evin_datapipe_lid_sensor_filtered_cb (gconstpointer data);
static void evin_datapipe_topmost_window_pid_cb (gconstpointer data);
static void evin_datapipe_call_state_cb (gconstpointer data);
static void evin_datapipe_interaction_expected_cb (gconstpointer data);
static void evin_datapipe_alarm_ui_state_cb (gconstpointer data);
static void evin_datapipe_init (void);
static void evin_datapipe_quit (void);
/* ------------------------------------------------------------------------- *
* MODULE_INIT
* ------------------------------------------------------------------------- */
gboolean mce_input_init (void);
void mce_input_exit (void);
/* ========================================================================= *
* EVIN_DATAPIPE
* ========================================================================= */
/** Cached submode: Initialized to invalid placeholder value */
static submode_t submode = MCE_SUBMODE_INVALID;
/** Cached current display state */
static display_state_t display_state_curr = MCE_DISPLAY_UNDEF;
/** Cached target display state */
static display_state_t display_state_next = MCE_DISPLAY_UNDEF;
/** Cached touch input policy state */
static bool touch_grab_wanted = false;
/** Cached keypad input policy state */
static bool keypad_grab_wanted = false;
/** Cached finger on touchscreen state */
static bool touch_detected = false;
/** Cached (raw) proximity sensor state */
static cover_state_t proximity_sensor_actual = COVER_UNDEF;
/** Cached (filtered) lid sensor state */
static cover_state_t lid_sensor_filtered = COVER_UNDEF;
/** Cached PID of process owning the topmost window on UI */
static int topmost_window_pid = -1;
/** Cached alarm state; assume no active alarms */
static alarm_ui_state_t alarm_ui_state = MCE_ALARM_UI_OFF_INT32;
/** Cached call state */
static call_state_t call_state = CALL_STATE_INVALID;
/** Cached Interaction expected state */
static bool interaction_expected = false;
/* ========================================================================= *
* GPIO_KEYS
* ========================================================================= */
/** Can GPIO key interrupts be disabled? */
static gboolean evin_gpio_key_disable_exists = FALSE;
/** Check if enable/disable controls for gpio keys exist
*/
static void
evin_gpio_init(void)
{
evin_gpio_key_disable_exists = (g_access(GPIO_KEY_DISABLE_PATH, W_OK) == 0);
}
/** Enable the specified GPIO key
*
* Non-existing or already enabled keys are silently ignored
*
* @param key The key to enable
*/
static void
evin_gpio_key_enable(unsigned key)
{
gchar *disabled_keys_old = NULL;
gchar *disabled_keys_new = NULL;
gulong *bitmask = NULL;
gsize bitmasklen;
if( !mce_read_string_from_file(GPIO_KEY_DISABLE_PATH, &disabled_keys_old) )
goto EXIT;
bitmasklen = (KEY_CNT / bitsize_of(*bitmask)) +
((KEY_CNT % bitsize_of(*bitmask)) ? 1 : 0);
bitmask = g_malloc0(bitmasklen * sizeof (*bitmask));
if( !string_to_bitfield(disabled_keys_old, &bitmask, bitmasklen) )
goto EXIT;
clear_bit(key, &bitmask);
if( !(disabled_keys_new = bitfield_to_string(bitmask, bitmasklen)) )
goto EXIT;
mce_write_string_to_file(GPIO_KEY_DISABLE_PATH, disabled_keys_new);
EXIT:
g_free(disabled_keys_old);
g_free(bitmask);
g_free(disabled_keys_new);
return;
}
/** Disable the specified GPIO key/switch
*
* non-existing or already disabled keys/switches are silently ignored
*
* @param key The key/switch to disable
*/
static void
evin_gpio_key_disable(unsigned key)
{
gchar *disabled_keys_old = NULL;
gchar *disabled_keys_new = NULL;
gulong *bitmask = NULL;
gsize bitmasklen;
if( !mce_read_string_from_file(GPIO_KEY_DISABLE_PATH, &disabled_keys_old) )
goto EXIT;
bitmasklen = (KEY_CNT / bitsize_of(*bitmask)) +
((KEY_CNT % bitsize_of(*bitmask)) ? 1 : 0);
bitmask = g_malloc0(bitmasklen * sizeof (*bitmask));
if( !string_to_bitfield(disabled_keys_old, &bitmask, bitmasklen) )
goto EXIT;
set_bit(key, &bitmask);
if( !(disabled_keys_new = bitfield_to_string(bitmask, bitmasklen)) )
goto EXIT;
mce_write_string_to_file(GPIO_KEY_DISABLE_PATH, disabled_keys_new);
EXIT:
g_free(disabled_keys_old);
g_free(bitmask);
g_free(disabled_keys_new);
return;
}
/** Disable/enable gpio keys based on submode changes
*
* @param data The submode stored in a pointer
*/
static void
evin_datapipe_submode_cb(gconstpointer data)
{
submode_t prev = submode;
submode = GPOINTER_TO_INT(data);
if( prev != submode )
mce_log(LL_DEBUG, "submode: %s", submode_change_repr(prev, submode));
/* If the tklock is enabled, disable the camera focus interrupts,
* since we don't use them anyway
*/
if( evin_gpio_key_disable_exists ) {
submode_t tklock_prev = (prev & MCE_SUBMODE_TKLOCK);
submode_t tklock_curr = (submode & MCE_SUBMODE_TKLOCK);
if( tklock_prev != tklock_curr ) {
if( tklock_curr )
evin_gpio_key_disable(KEY_CAMERA_FOCUS);
else
evin_gpio_key_enable(KEY_CAMERA_FOCUS);
}
}
}
/* ========================================================================= *
* EVENT_MAPPING
* ========================================================================= */
/** Guess event type from name of the event code
*
* @param event_code_name name of the event e.g. "SW_KEYPAD_SLIDE"
*
* @return event type id e.g. EV_SW, or -1 if unknown
*/
static int
evin_event_mapping_guess_event_type(const char *event_code_name)
{
int etype = -1;
if( !event_code_name )
goto EXIT;
/* We are interested only in EV_KEY and EV_SW events */
if( !strncmp(event_code_name, "KEY_", 4) )
etype = EV_KEY;
else if( !strncmp(event_code_name, "BTN_", 4) )
etype = EV_KEY;
else if( !strncmp(event_code_name, "SW_", 3) )
etype = EV_SW;
EXIT:
return etype;
}
/** Parse positive integer value originating from configuration text
*
* @param text Number in text
*
* @return numeric value of text, or -1 in case of errors
*/
static int
evin_event_mapping_parse_number(const char *text)
{
errno = 0;
char *pos = (char *)text;
long val = strtol(pos, &pos, 0);
int res = (int)val;
/* No digits, negative, int overflow or other issues? */
if( pos == text || res < 0 || res != val || errno != 0)
res = -1;
return res;
}
/** Fill in event type and code based on name of the event code
*
* @param event_code_name name of the event e.g. "SW_KEYPAD_SLIDE"
*
* @return true on success, or false on failure
*/
static bool
evin_event_mapping_parse_event(struct input_event *ev, const char *event_code_name)
{
bool success = false;
if( !event_code_name )
goto EXIT;
int etype = -1;
int ecode = -1;
/* Check if event is given in numerical form */
if( !strncmp(event_code_name, "KEYCODE_", 8) ) {
etype = EV_KEY;
ecode = evin_event_mapping_parse_number(event_code_name + 8);
}
else if( !strncmp(event_code_name, "BTNCODE_", 8) ) {
etype = EV_KEY;
ecode = evin_event_mapping_parse_number(event_code_name + 8);
}
else if( !strncmp(event_code_name, "SWCODE_", 7) ) {
etype = EV_SW;
ecode = evin_event_mapping_parse_number(event_code_name + 7);
}
if( ecode < 0 ) {
/* Lookup by event name */
etype = evin_event_mapping_guess_event_type(event_code_name);
if( etype < 0 )
goto EXIT;
ecode = evdev_lookup_event_code(etype, event_code_name);
if( ecode < 0 )
goto EXIT;
}
ev->type = etype;
ev->code = ecode;
success = true;
EXIT:
return success;
}
/** Fill in event mapping structure from source and target event code names
*
* @param self pointer to a mapping structure to fill in
* @param kernel_emits name of the event kernel will be emitting
* @param mce_expects mame of the event mce is expecting instead
*
* @return true on success, or false on failure
*/
static bool
evin_event_mapping_parse_config(evin_event_mapping_t *self,
const char *kernel_emits,
const char *mce_expects)
{
bool success = false;
if( !evin_event_mapping_parse_event(&self->em_kernel_emits, kernel_emits) )
goto EXIT;
if( !evin_event_mapping_parse_event(&self->em_mce_expects, mce_expects) )
goto EXIT;
success = true;
EXIT:
return success;
}
/** Translate event if applicable
*
* @param self pointer to a mapping structure to use
* @param ev input event to modify
*
* @param true if event was modified, false otherwise
*/
static bool
evin_event_mapping_apply(const evin_event_mapping_t *self, struct input_event *ev)
{
bool applied = false;
if( self->em_kernel_emits.type != ev->type )
goto EXIT;
if( self->em_kernel_emits.code != ev->code )
goto EXIT;
mce_log(LL_DEBUG, "map: %s:%s -> %s:%s",
evdev_get_event_type_name(self->em_kernel_emits.type),
evdev_get_event_code_name(self->em_kernel_emits.type,
self->em_kernel_emits.code),
evdev_get_event_type_name(self->em_mce_expects.type),
evdev_get_event_code_name(self->em_mce_expects.type,
self->em_mce_expects.code));
ev->type = self->em_mce_expects.type;
ev->code = self->em_mce_expects.code;
applied = true;
EXIT:
return applied;
}
/** Lookup table for translatable events */
static evin_event_mapping_t *evin_event_mapper_lut = 0;
/** Number of entries in evin_event_mapper_lut */
static size_t evin_event_mapper_cnt = 0;
/** Reverse lookup switch kernel is emitting from switch mce is expecting
*
* Note: For use from event switch initial state evaluation only.
*
* @param expected_by_mce event code of SW_xxx kind mce expect to see
*
* @return event code of SW_xxx kind kernel might be sending
*/
static int
evin_event_mapper_rlookup_switch(int expected_by_mce)
{
/* Assume kernel emits events mce is expecting to see */
int emitted_by_kernel = expected_by_mce;
/* If emitted_by_kernel -> expected_by_mce mapping exist, use it */
for( size_t i = 0; i < evin_event_mapper_cnt; ++i ) {
evin_event_mapping_t *map = evin_event_mapper_lut + i;
if( map->em_kernel_emits.type != EV_SW )
continue;
if( map->em_mce_expects.type != EV_SW )
continue;
if( map->em_mce_expects.code != expected_by_mce )
continue;
emitted_by_kernel = map->em_kernel_emits.code;
goto EXIT;
}
/* But if there is rule for mapping the event for something
* else, it should be ignored instead of used as is */
for( size_t i = 0; i < evin_event_mapper_cnt; ++i ) {
evin_event_mapping_t *map = evin_event_mapper_lut + i;
if( map->em_kernel_emits.type != EV_SW )
continue;
if( map->em_mce_expects.type != EV_SW )
continue;
if( map->em_kernel_emits.code != expected_by_mce )
continue;
/* Assumption: SW_MAX is valid index for ioctl() probing,
* but is not an alias for anything that kernel
* would report.
*/
emitted_by_kernel = SW_MAX;
goto EXIT;
}
EXIT:
return emitted_by_kernel;
}
/** Translate event emitted by kernel to something mce is expecting to see
*
* @param ev Input event to translate
*/
static void
evin_event_mapper_translate_event(struct input_event *ev)
{
if( !ev )
goto EXIT;
/* Skip if there is no translation lookup table */
if( !evin_event_mapper_lut )
goto EXIT;
/* We want to process key and switch events, but under all
* potentially high frequency events should be skipped */
switch( ev->type ) {
case EV_KEY:
case EV_SW:
break;
default:
goto EXIT;
}
/* Try to find suitable mapping from lookup table */
for( size_t i = 0; i < evin_event_mapper_cnt; ++i ) {
evin_event_mapping_t *map = evin_event_mapper_lut + i;
if( evin_event_mapping_apply(map, ev) )
break;
}
EXIT:
return;
}
/** Initialize event translation lookup table
*/
static void
evin_event_mapper_init(void)
{
static const char grp[] = MCE_CONF_EVDEV_GROUP;
gchar **keys = 0;
gsize count = 0;
gsize valid = 0;
if( !mce_conf_has_group(grp) )
goto EXIT;
keys = mce_conf_get_keys(grp, &count);
if( !keys || !count )
goto EXIT;
evin_event_mapper_lut = calloc(count, sizeof *evin_event_mapper_lut);
for( gsize i = 0; i < count; ++i ) {
evin_event_mapping_t *map = evin_event_mapper_lut + valid;
const gchar *key = keys[i];
gchar *val = mce_conf_get_string(grp, key, 0);
if( val && evin_event_mapping_parse_config(map, key, val) )
++valid;
g_free(val);
}
evin_event_mapper_cnt = valid;
EXIT:
/* Remove also lookup table pointer if there are no entries */
if( !evin_event_mapper_cnt )
evin_event_mapper_quit();
g_strfreev(keys);
if( mce_log_p(LL_DEBUG) ) {
mce_log(LL_DEBUG, "EVDEV MAPS: %zd", evin_event_mapper_cnt);
for( size_t i = 0; i < evin_event_mapper_cnt; ++i ) {
evin_event_mapping_t *map = evin_event_mapper_lut + i;
mce_log(LL_DEBUG, "[%zu] %s:%s -> %s:%s", i,
evdev_get_event_type_name(map->em_kernel_emits.type),
evdev_get_event_code_name(map->em_kernel_emits.type,
map->em_kernel_emits.code),
evdev_get_event_type_name(map->em_mce_expects.type),
evdev_get_event_code_name(map->em_mce_expects.type,
map->em_mce_expects.code));
}
}
return;
}
/** Release event translation lookup table
*/
static void
evin_event_mapper_quit(void)
{
free(evin_event_mapper_lut),