sof_cirrus_common.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * This file defines data structures and functions used in Machine
  4 * Driver for Intel platforms with Cirrus Logic Codecs.
  5 *
  6 * Copyright 2022 Intel Corporation.
  7 */
  8#include <linux/module.h>
  9#include <sound/sof.h>
 10#include "../../codecs/cs35l41.h"
 11#include "sof_cirrus_common.h"
 12
 13#define CS35L41_HID "CSC3541"
 14#define CS35L41_MAX_AMPS 4
 15
 16/*
 17 * Cirrus Logic CS35L41/CS35L53
 18 */
 19static const struct snd_kcontrol_new cs35l41_kcontrols[] = {
 20	SOC_DAPM_PIN_SWITCH("WL Spk"),
 21	SOC_DAPM_PIN_SWITCH("WR Spk"),
 22	SOC_DAPM_PIN_SWITCH("TL Spk"),
 23	SOC_DAPM_PIN_SWITCH("TR Spk"),
 24};
 25
 26static const struct snd_soc_dapm_widget cs35l41_dapm_widgets[] = {
 27	SND_SOC_DAPM_SPK("WL Spk", NULL),
 28	SND_SOC_DAPM_SPK("WR Spk", NULL),
 29	SND_SOC_DAPM_SPK("TL Spk", NULL),
 30	SND_SOC_DAPM_SPK("TR Spk", NULL),
 31};
 32
 33static const struct snd_soc_dapm_route cs35l41_dapm_routes[] = {
 34	/* speaker */
 35	{"WL Spk", NULL, "WL SPK"},
 36	{"WR Spk", NULL, "WR SPK"},
 37	{"TL Spk", NULL, "TL SPK"},
 38	{"TR Spk", NULL, "TR SPK"},
 39};
 40
 41static struct snd_soc_dai_link_component cs35l41_components[CS35L41_MAX_AMPS];
 42
 43/*
 44 * Mapping between ACPI instance id and speaker position.
 45 */
 46static struct snd_soc_codec_conf cs35l41_codec_conf[CS35L41_MAX_AMPS];
 47
 48static int cs35l41_init(struct snd_soc_pcm_runtime *rtd)
 49{
 50	struct snd_soc_card *card = rtd->card;
 51	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
 52	int ret;
 53
 54	ret = snd_soc_dapm_new_controls(dapm, cs35l41_dapm_widgets,
 55					ARRAY_SIZE(cs35l41_dapm_widgets));
 56	if (ret) {
 57		dev_err(rtd->dev, "fail to add dapm controls, ret %d\n", ret);
 58		return ret;
 59	}
 60
 61	ret = snd_soc_add_card_controls(card, cs35l41_kcontrols,
 62					ARRAY_SIZE(cs35l41_kcontrols));
 63	if (ret) {
 64		dev_err(rtd->dev, "fail to add card controls, ret %d\n", ret);
 65		return ret;
 66	}
 67
 68	ret = snd_soc_dapm_add_routes(dapm, cs35l41_dapm_routes,
 69				      ARRAY_SIZE(cs35l41_dapm_routes));
 70
 71	if (ret)
 72		dev_err(rtd->dev, "fail to add dapm routes, ret %d\n", ret);
 73
 74	return ret;
 75}
 76
 77/*
 78 * Channel map:
 79 *
 80 * TL/WL: ASPRX1 on slot 0, ASPRX2 on slot 1 (default)
 81 * TR/WR: ASPRX1 on slot 1, ASPRX2 on slot 0
 82 */
 83static const struct {
 84	unsigned int rx[2];
 85} cs35l41_channel_map[] = {
 86	{.rx = {0, 1}}, /* WL */
 87	{.rx = {1, 0}}, /* WR */
 88	{.rx = {0, 1}}, /* TL */
 89	{.rx = {1, 0}}, /* TR */
 90};
 91
 92static int cs35l41_hw_params(struct snd_pcm_substream *substream,
 93			     struct snd_pcm_hw_params *params)
 94{
 95	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 96	struct snd_soc_dai *codec_dai;
 97	int clk_freq, i, ret;
 98
 99	clk_freq = sof_dai_get_bclk(rtd); /* BCLK freq */
100
101	if (clk_freq <= 0) {
102		dev_err(rtd->dev, "fail to get bclk freq, ret %d\n", clk_freq);
103		return -EINVAL;
104	}
105
106	for_each_rtd_codec_dais(rtd, i, codec_dai) {
107		/* call dai driver's set_sysclk() callback */
108		ret = snd_soc_dai_set_sysclk(codec_dai, CS35L41_CLKID_SCLK,
109					     clk_freq, SND_SOC_CLOCK_IN);
110		if (ret < 0) {
111			dev_err(codec_dai->dev, "fail to set sysclk, ret %d\n",
112				ret);
113			return ret;
114		}
115
116		/* call component driver's set_sysclk() callback */
117		ret = snd_soc_component_set_sysclk(codec_dai->component,
118						   CS35L41_CLKID_SCLK, 0,
119						   clk_freq, SND_SOC_CLOCK_IN);
120		if (ret < 0) {
121			dev_err(codec_dai->dev, "fail to set component sysclk, ret %d\n",
122				ret);
123			return ret;
124		}
125
126		/* setup channel map */
127		ret = snd_soc_dai_set_channel_map(codec_dai, 0, NULL,
128						  ARRAY_SIZE(cs35l41_channel_map[i].rx),
129						  (unsigned int *)cs35l41_channel_map[i].rx);
130		if (ret < 0) {
131			dev_err(codec_dai->dev, "fail to set channel map, ret %d\n",
132				ret);
133			return ret;
134		}
135	}
136
137	return 0;
138}
139
140static const struct snd_soc_ops cs35l41_ops = {
141	.hw_params = cs35l41_hw_params,
142};
143
144static const char * const cs35l41_name_prefixes[] = { "WL", "WR", "TL", "TR" };
145
146/*
147 * Expected UIDs are integers (stored as strings).
148 * UID Mapping is fixed:
149 * UID 0x0 -> WL
150 * UID 0x1 -> WR
151 * UID 0x2 -> TL
152 * UID 0x3 -> TR
153 * Note: If there are less than 4 Amps, UIDs still map to WL/WR/TL/TR. Dynamic code will only create
154 * dai links for UIDs which exist, and ignore non-existant ones. Only 2 or 4 amps are expected.
155 * Return number of codecs found.
156 */
157static int cs35l41_compute_codec_conf(void)
158{
159	static const char * const uid_strings[] = { "0", "1", "2", "3" };
160	unsigned int uid, sz = 0;
161	struct acpi_device *adev;
162	struct device *physdev;
163
164	for (uid = 0; uid < CS35L41_MAX_AMPS; uid++) {
165		adev = acpi_dev_get_first_match_dev(CS35L41_HID, uid_strings[uid], -1);
166		if (!adev) {
167			pr_devel("Cannot find match for HID %s UID %u (%s)\n", CS35L41_HID, uid,
168				 cs35l41_name_prefixes[uid]);
169			continue;
170		}
171		physdev = get_device(acpi_get_first_physical_node(adev));
172		acpi_dev_put(adev);
173		if (!physdev) {
174			pr_devel("Cannot find physical node for HID %s UID %u (%s)\n", CS35L41_HID,
175					uid, cs35l41_name_prefixes[uid]);
176			return 0;
177		}
178		cs35l41_components[sz].name = dev_name(physdev);
179		cs35l41_components[sz].dai_name = CS35L41_CODEC_DAI;
180		cs35l41_codec_conf[sz].dlc.name = dev_name(physdev);
181		cs35l41_codec_conf[sz].name_prefix = cs35l41_name_prefixes[uid];
182		sz++;
183	}
184
185	if (sz != 2 && sz != 4)
186		pr_warn("Invalid number of cs35l41 amps found: %d, expected 2 or 4\n", sz);
187	return sz;
188}
189
190void cs35l41_set_dai_link(struct snd_soc_dai_link *link)
191{
192	link->num_codecs = cs35l41_compute_codec_conf();
193	link->codecs = cs35l41_components;
194	link->init = cs35l41_init;
195	link->ops = &cs35l41_ops;
196}
197EXPORT_SYMBOL_NS(cs35l41_set_dai_link, "SND_SOC_INTEL_SOF_CIRRUS_COMMON");
198
199void cs35l41_set_codec_conf(struct snd_soc_card *card)
200{
201	card->codec_conf = cs35l41_codec_conf;
202	card->num_configs = ARRAY_SIZE(cs35l41_codec_conf);
203}
204EXPORT_SYMBOL_NS(cs35l41_set_codec_conf, "SND_SOC_INTEL_SOF_CIRRUS_COMMON");
205
206MODULE_DESCRIPTION("ASoC Intel SOF Cirrus Logic helpers");
207MODULE_LICENSE("GPL");