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	int ret;
 52
 53	ret = snd_soc_dapm_new_controls(&card->dapm, cs35l41_dapm_widgets,
 54					ARRAY_SIZE(cs35l41_dapm_widgets));
 55	if (ret) {
 56		dev_err(rtd->dev, "fail to add dapm controls, ret %d\n", ret);
 57		return ret;
 58	}
 59
 60	ret = snd_soc_add_card_controls(card, cs35l41_kcontrols,
 61					ARRAY_SIZE(cs35l41_kcontrols));
 62	if (ret) {
 63		dev_err(rtd->dev, "fail to add card controls, ret %d\n", ret);
 64		return ret;
 65	}
 66
 67	ret = snd_soc_dapm_add_routes(&card->dapm, cs35l41_dapm_routes,
 68				      ARRAY_SIZE(cs35l41_dapm_routes));
 69
 70	if (ret)
 71		dev_err(rtd->dev, "fail to add dapm routes, ret %d\n", ret);
 72
 73	return ret;
 74}
 75
 76/*
 77 * Channel map:
 78 *
 79 * TL/WL: ASPRX1 on slot 0, ASPRX2 on slot 1 (default)
 80 * TR/WR: ASPRX1 on slot 1, ASPRX2 on slot 0
 81 */
 82static const struct {
 83	unsigned int rx[2];
 84} cs35l41_channel_map[] = {
 85	{.rx = {0, 1}}, /* WL */
 86	{.rx = {1, 0}}, /* WR */
 87	{.rx = {0, 1}}, /* TL */
 88	{.rx = {1, 0}}, /* TR */
 89};
 90
 91static int cs35l41_hw_params(struct snd_pcm_substream *substream,
 92			     struct snd_pcm_hw_params *params)
 93{
 94	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 95	struct snd_soc_dai *codec_dai;
 96	int clk_freq, i, ret;
 97
 98	clk_freq = sof_dai_get_bclk(rtd); /* BCLK freq */
 99
100	if (clk_freq <= 0) {
101		dev_err(rtd->dev, "fail to get bclk freq, ret %d\n", clk_freq);
102		return -EINVAL;
103	}
104
105	for_each_rtd_codec_dais(rtd, i, codec_dai) {
106		/* call dai driver's set_sysclk() callback */
107		ret = snd_soc_dai_set_sysclk(codec_dai, CS35L41_CLKID_SCLK,
108					     clk_freq, SND_SOC_CLOCK_IN);
109		if (ret < 0) {
110			dev_err(codec_dai->dev, "fail to set sysclk, ret %d\n",
111				ret);
112			return ret;
113		}
114
115		/* call component driver's set_sysclk() callback */
116		ret = snd_soc_component_set_sysclk(codec_dai->component,
117						   CS35L41_CLKID_SCLK, 0,
118						   clk_freq, SND_SOC_CLOCK_IN);
119		if (ret < 0) {
120			dev_err(codec_dai->dev, "fail to set component sysclk, ret %d\n",
121				ret);
122			return ret;
123		}
124
125		/* setup channel map */
126		ret = snd_soc_dai_set_channel_map(codec_dai, 0, NULL,
127						  ARRAY_SIZE(cs35l41_channel_map[i].rx),
128						  (unsigned int *)cs35l41_channel_map[i].rx);
129		if (ret < 0) {
130			dev_err(codec_dai->dev, "fail to set channel map, ret %d\n",
131				ret);
132			return ret;
133		}
134	}
135
136	return 0;
137}
138
139static const struct snd_soc_ops cs35l41_ops = {
140	.hw_params = cs35l41_hw_params,
141};
142
143static const char * const cs35l41_name_prefixes[] = { "WL", "WR", "TL", "TR" };
144
145/*
146 * Expected UIDs are integers (stored as strings).
147 * UID Mapping is fixed:
148 * UID 0x0 -> WL
149 * UID 0x1 -> WR
150 * UID 0x2 -> TL
151 * UID 0x3 -> TR
152 * Note: If there are less than 4 Amps, UIDs still map to WL/WR/TL/TR. Dynamic code will only create
153 * dai links for UIDs which exist, and ignore non-existant ones. Only 2 or 4 amps are expected.
154 * Return number of codecs found.
155 */
156static int cs35l41_compute_codec_conf(void)
157{
158	static const char * const uid_strings[] = { "0", "1", "2", "3" };
159	unsigned int uid, sz = 0;
160	struct acpi_device *adev;
161	struct device *physdev;
162
163	for (uid = 0; uid < CS35L41_MAX_AMPS; uid++) {
164		adev = acpi_dev_get_first_match_dev(CS35L41_HID, uid_strings[uid], -1);
165		if (!adev) {
166			pr_devel("Cannot find match for HID %s UID %u (%s)\n", CS35L41_HID, uid,
167				 cs35l41_name_prefixes[uid]);
168			continue;
169		}
170		physdev = get_device(acpi_get_first_physical_node(adev));
171		acpi_dev_put(adev);
172		if (!physdev) {
173			pr_devel("Cannot find physical node for HID %s UID %u (%s)\n", CS35L41_HID,
174					uid, cs35l41_name_prefixes[uid]);
175			return 0;
176		}
177		cs35l41_components[sz].name = dev_name(physdev);
178		cs35l41_components[sz].dai_name = CS35L41_CODEC_DAI;
179		cs35l41_codec_conf[sz].dlc.name = dev_name(physdev);
180		cs35l41_codec_conf[sz].name_prefix = cs35l41_name_prefixes[uid];
181		sz++;
182	}
183
184	if (sz != 2 && sz != 4)
185		pr_warn("Invalid number of cs35l41 amps found: %d, expected 2 or 4\n", sz);
186	return sz;
187}
188
189void cs35l41_set_dai_link(struct snd_soc_dai_link *link)
190{
191	link->num_codecs = cs35l41_compute_codec_conf();
192	link->codecs = cs35l41_components;
193	link->init = cs35l41_init;
194	link->ops = &cs35l41_ops;
195}
196EXPORT_SYMBOL_NS(cs35l41_set_dai_link, "SND_SOC_INTEL_SOF_CIRRUS_COMMON");
197
198void cs35l41_set_codec_conf(struct snd_soc_card *card)
199{
200	card->codec_conf = cs35l41_codec_conf;
201	card->num_configs = ARRAY_SIZE(cs35l41_codec_conf);
202}
203EXPORT_SYMBOL_NS(cs35l41_set_codec_conf, "SND_SOC_INTEL_SOF_CIRRUS_COMMON");
204
205MODULE_DESCRIPTION("ASoC Intel SOF Cirrus Logic helpers");
206MODULE_LICENSE("GPL");