linux/drivers/media/rc/img-ir/img-ir-raw.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * ImgTec IR Raw Decoder found in PowerDown Controller.
 *
 * Copyright 2010-2014 Imagination Technologies Ltd.
 *
 * This ties into the input subsystem using the RC-core in raw mode. Raw IR
 * signal edges are reported and decoded by generic software decoders.
 */

#include <linux/spinlock.h>
#include <media/rc-core.h>
#include "img-ir.h"

#define ECHO_TIMEOUT_MS …

/* must be called with priv->lock held */
static void img_ir_refresh_raw(struct img_ir_priv *priv, u32 irq_status)
{ … }

/* called with priv->lock held */
void img_ir_isr_raw(struct img_ir_priv *priv, u32 irq_status)
{ … }

/*
 * Echo timer callback function.
 * The raw decoders expect to get a final sample even if there are no edges, in
 * order to be assured of the final space. If there are no edges for a certain
 * time we use this timer to emit a final sample to satisfy them.
 */
static void img_ir_echo_timer(struct timer_list *t)
{ … }

void img_ir_setup_raw(struct img_ir_priv *priv)
{ … }

int img_ir_probe_raw(struct img_ir_priv *priv)
{ … }

void img_ir_remove_raw(struct img_ir_priv *priv)
{ … }