sound/soc/intel/boards/sof_sdw_rt1308.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 // Copyright (c) 2020 Intel Corporation
   3
   4 /*
   5  *  sof_sdw_rt1308 - Helpers to handle RT1308 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 #include "../../codecs/rt1308.h"
  16
  17 static const struct snd_soc_dapm_widget rt1308_widgets[] = {
  18         SND_SOC_DAPM_SPK("Speaker", NULL),
  19 };
  20
  21 /*
  22  * dapm routes for rt1308 will be registered dynamically according
  23  * to the number of rt1308 used. The first two entries will be registered
  24  * for one codec case, and the last two entries are also registered
  25  * if two 1308s are used.
  26  */
  27 static const struct snd_soc_dapm_route rt1308_map[] = {
  28         { "Speaker", NULL, "rt1308-1 SPOL" },
  29         { "Speaker", NULL, "rt1308-1 SPOR" },
  30         { "Speaker", NULL, "rt1308-2 SPOL" },
  31         { "Speaker", NULL, "rt1308-2 SPOR" },
  32 };
  33
  34 static const struct snd_kcontrol_new rt1308_controls[] = {
  35         SOC_DAPM_PIN_SWITCH("Speaker"),
  36 };
  37
  38 static int first_spk_init(struct snd_soc_pcm_runtime *rtd)
  39 {
  40         struct snd_soc_card *card = rtd->card;
  41         int ret;
  42
  43         card->components = devm_kasprintf(card->dev, GFP_KERNEL,
  44                                           "%s spk:rt1308",
  45                                           card->components);
  46         if (!card->components)
  47                 return -ENOMEM;
  48
  49         ret = snd_soc_add_card_controls(card, rt1308_controls,
  50                                         ARRAY_SIZE(rt1308_controls));
  51         if (ret) {
  52                 dev_err(card->dev, "rt1308 controls addition failed: %d\n", ret);
  53                 return ret;
  54         }
  55
  56         ret = snd_soc_dapm_new_controls(&card->dapm, rt1308_widgets,
  57                                         ARRAY_SIZE(rt1308_widgets));
  58         if (ret) {
  59                 dev_err(card->dev, "rt1308 widgets addition failed: %d\n", ret);
  60                 return ret;
  61         }
  62
  63         ret = snd_soc_dapm_add_routes(&card->dapm, rt1308_map, 2);
  64         if (ret)
  65                 dev_err(rtd->dev, "failed to add first SPK map: %d\n", ret);
  66
  67         return ret;
  68 }
  69
  70 static int second_spk_init(struct snd_soc_pcm_runtime *rtd)
  71 {
  72         struct snd_soc_card *card = rtd->card;
  73         int ret;
  74
  75         ret = snd_soc_dapm_add_routes(&card->dapm, rt1308_map + 2, 2);
  76         if (ret)
  77                 dev_err(rtd->dev, "failed to add second SPK map: %d\n", ret);
  78
  79         return ret;
  80 }
  81
  82 static int all_spk_init(struct snd_soc_pcm_runtime *rtd)
  83 {
  84         int ret;
  85
  86         ret = first_spk_init(rtd);
  87         if (ret)
  88                 return ret;
  89
  90         return second_spk_init(rtd);
  91 }
  92
  93 static int rt1308_i2s_hw_params(struct snd_pcm_substream *substream,
  94                                 struct snd_pcm_hw_params *params)
  95 {
  96         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  97         struct snd_soc_card *card = rtd->card;
  98         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  99         int clk_id, clk_freq, pll_out;
 100         int err;
 101
 102         clk_id = RT1308_PLL_S_MCLK;
 103         clk_freq = 38400000;
 104
 105         pll_out = params_rate(params) * 512;
 106
 107         /* Set rt1308 pll */
 108         err = snd_soc_dai_set_pll(codec_dai, 0, clk_id, clk_freq, pll_out);
 109         if (err < 0) {
 110                 dev_err(card->dev, "Failed to set RT1308 PLL: %d\n", err);
 111                 return err;
 112         }
 113
 114         /* Set rt1308 sysclk */
 115         err = snd_soc_dai_set_sysclk(codec_dai, RT1308_FS_SYS_S_PLL, pll_out,
 116                                      SND_SOC_CLOCK_IN);
 117         if (err < 0) {
 118                 dev_err(card->dev, "Failed to set RT1308 SYSCLK: %d\n", err);
 119                 return err;
 120         }
 121
 122         return 0;
 123 }
 124
 125 /* machine stream operations */
 126 struct snd_soc_ops sof_sdw_rt1308_i2s_ops = {
 127         .hw_params = rt1308_i2s_hw_params,
 128 };
 129
 130 int sof_sdw_rt1308_init(const struct snd_soc_acpi_link_adr *link,
 131                         struct snd_soc_dai_link *dai_links,
 132                         struct sof_sdw_codec_info *info,
 133                         bool playback)
 134 {
 135         /* Count amp number and do init on playback link only. */
 136         if (!playback)
 137                 return 0;
 138
 139         info->amp_num++;
 140         if (info->amp_num == 1)
 141                 dai_links->init = first_spk_init;
 142
 143         if (info->amp_num == 2) {
 144                 /*
 145                  * if two 1308s are in one dai link, the init function
 146                  * in this dai link will be first set for the first speaker,
 147                  * and it should be reset to initialize all speakers when
 148                  * the second speaker is found.
 149                  */
 150                 if (dai_links->init)
 151                         dai_links->init = all_spk_init;
 152                 else
 153                         dai_links->init = second_spk_init;
 154         }
 155
 156         return 0;
 157 }