sound/soc/intel/boards/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  */
  19 static 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
  26 static 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
  33 static 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
  41 static struct snd_soc_dai_link_component cs35l41_components[CS35L41_MAX_AMPS];
  42
  43 /*
  44  * Mapping between ACPI instance id and speaker position.
  45  */
  46 static struct snd_soc_codec_conf cs35l41_codec_conf[CS35L41_MAX_AMPS];
  47
  48 static 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  */
  82 static 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
  91 static 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
 139 static const struct snd_soc_ops cs35l41_ops = {
 140         .hw_params = cs35l41_hw_params,
 141 };
 142
 143 static 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  */
 156 static 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
 189 void 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 }
 196 EXPORT_SYMBOL_NS(cs35l41_set_dai_link, SND_SOC_INTEL_SOF_CIRRUS_COMMON);
 197
 198 void 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 }
 203 EXPORT_SYMBOL_NS(cs35l41_set_codec_conf, SND_SOC_INTEL_SOF_CIRRUS_COMMON);
 204
 205 MODULE_DESCRIPTION("ASoC Intel SOF Cirrus Logic helpers");
 206 MODULE_LICENSE("GPL");