cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sof_sdw_rt1316.c (2955B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2// Copyright (c) 2020 Intel Corporation
      3
      4/*
      5 *  sof_sdw_rt1316 - Helpers to handle RT1316 from generic machine driver
      6 */
      7
      8#include <linux/device.h>
      9#include <linux/errno.h>
     10#include <sound/control.h>
     11#include <sound/soc.h>
     12#include <sound/soc-acpi.h>
     13#include <sound/soc-dapm.h>
     14#include "sof_sdw_common.h"
     15
     16static const struct snd_soc_dapm_widget rt1316_widgets[] = {
     17	SND_SOC_DAPM_SPK("Speaker", NULL),
     18};
     19
     20/*
     21 * dapm routes for rt1316 will be registered dynamically according
     22 * to the number of rt1316 used. The first two entries will be registered
     23 * for one codec case, and the last two entries are also registered
     24 * if two 1316s are used.
     25 */
     26static const struct snd_soc_dapm_route rt1316_map[] = {
     27	{ "Speaker", NULL, "rt1316-1 SPOL" },
     28	{ "Speaker", NULL, "rt1316-1 SPOR" },
     29	{ "Speaker", NULL, "rt1316-2 SPOL" },
     30	{ "Speaker", NULL, "rt1316-2 SPOR" },
     31};
     32
     33static const struct snd_kcontrol_new rt1316_controls[] = {
     34	SOC_DAPM_PIN_SWITCH("Speaker"),
     35};
     36
     37static int first_spk_init(struct snd_soc_pcm_runtime *rtd)
     38{
     39	struct snd_soc_card *card = rtd->card;
     40	int ret;
     41
     42	card->components = devm_kasprintf(card->dev, GFP_KERNEL,
     43					  "%s spk:rt1316",
     44					  card->components);
     45	if (!card->components)
     46		return -ENOMEM;
     47
     48	ret = snd_soc_add_card_controls(card, rt1316_controls,
     49					ARRAY_SIZE(rt1316_controls));
     50	if (ret) {
     51		dev_err(card->dev, "rt1316 controls addition failed: %d\n", ret);
     52		return ret;
     53	}
     54
     55	ret = snd_soc_dapm_new_controls(&card->dapm, rt1316_widgets,
     56					ARRAY_SIZE(rt1316_widgets));
     57	if (ret) {
     58		dev_err(card->dev, "rt1316 widgets addition failed: %d\n", ret);
     59		return ret;
     60	}
     61
     62	ret = snd_soc_dapm_add_routes(&card->dapm, rt1316_map, 2);
     63	if (ret)
     64		dev_err(rtd->dev, "failed to add first SPK map: %d\n", ret);
     65
     66	return ret;
     67}
     68
     69static int second_spk_init(struct snd_soc_pcm_runtime *rtd)
     70{
     71	struct snd_soc_card *card = rtd->card;
     72	int ret;
     73
     74	ret = snd_soc_dapm_add_routes(&card->dapm, rt1316_map + 2, 2);
     75	if (ret)
     76		dev_err(rtd->dev, "failed to add second SPK map: %d\n", ret);
     77
     78	return ret;
     79}
     80
     81static int all_spk_init(struct snd_soc_pcm_runtime *rtd)
     82{
     83	int ret;
     84
     85	ret = first_spk_init(rtd);
     86	if (ret)
     87		return ret;
     88
     89	return second_spk_init(rtd);
     90}
     91
     92int sof_sdw_rt1316_init(struct snd_soc_card *card,
     93			const struct snd_soc_acpi_link_adr *link,
     94			struct snd_soc_dai_link *dai_links,
     95			struct sof_sdw_codec_info *info,
     96			bool playback)
     97{
     98	/* Count amp number and do init on playback link only. */
     99	if (!playback)
    100		return 0;
    101
    102	info->amp_num++;
    103	if (info->amp_num == 1)
    104		dai_links->init = first_spk_init;
    105
    106	if (info->amp_num == 2) {
    107		/*
    108		 * if two 1316s are in one dai link, the init function
    109		 * in this dai link will be first set for the first speaker,
    110		 * and it should be reset to initialize all speakers when
    111		 * the second speaker is found.
    112		 */
    113		if (dai_links->init)
    114			dai_links->init = all_spk_init;
    115		else
    116			dai_links->init = second_spk_init;
    117	}
    118
    119	return 0;
    120}