sound/soc/qcom/sdm845.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/module.h>
   7 #include <linux/platform_device.h>
   8 #include <linux/of_device.h>
   9 #include <sound/pcm.h>
  10 #include <sound/pcm_params.h>
  11 #include "common.h"
  12 #include "qdsp6/q6afe.h"
  13
  14 #define DEFAULT_SAMPLE_RATE_48K         48000
  15 #define DEFAULT_MCLK_RATE               24576000
  16 #define DEFAULT_BCLK_RATE               12288000
  17
  18 struct sdm845_snd_data {
  19         struct snd_soc_card *card;
  20         uint32_t pri_mi2s_clk_count;
  21         uint32_t quat_tdm_clk_count;
  22 };
  23
  24 static unsigned int tdm_slot_offset[8] = {0, 4, 8, 12, 16, 20, 24, 28};
  25
  26 static int sdm845_tdm_snd_hw_params(struct snd_pcm_substream *substream,
  27                                         struct snd_pcm_hw_params *params)
  28 {
  29         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  30         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  31         int ret = 0;
  32         int channels, slot_width;
  33
  34         switch (params_format(params)) {
  35         case SNDRV_PCM_FORMAT_S16_LE:
  36                 slot_width = 32;
  37                 break;
  38         default:
  39                 dev_err(rtd->dev, "%s: invalid param format 0x%x\n",
  40                                 __func__, params_format(params));
  41                 return -EINVAL;
  42         }
  43
  44         channels = params_channels(params);
  45         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
  46                 ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0x3,
  47                                 8, slot_width);
  48                 if (ret < 0) {
  49                         dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
  50                                         __func__, ret);
  51                         goto end;
  52                 }
  53
  54                 ret = snd_soc_dai_set_channel_map(cpu_dai, 0, NULL,
  55                                 channels, tdm_slot_offset);
  56                 if (ret < 0) {
  57                         dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
  58                                         __func__, ret);
  59                         goto end;
  60                 }
  61         } else {
  62                 ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0xf, 0,
  63                                 8, slot_width);
  64                 if (ret < 0) {
  65                         dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
  66                                         __func__, ret);
  67                         goto end;
  68                 }
  69
  70                 ret = snd_soc_dai_set_channel_map(cpu_dai, channels,
  71                                 tdm_slot_offset, 0, NULL);
  72                 if (ret < 0) {
  73                         dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
  74                                         __func__, ret);
  75                         goto end;
  76                 }
  77         }
  78 end:
  79         return ret;
  80 }
  81
  82 static int sdm845_snd_hw_params(struct snd_pcm_substream *substream,
  83                                         struct snd_pcm_hw_params *params)
  84 {
  85         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  86         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  87         int ret = 0;
  88
  89         switch (cpu_dai->id) {
  90         case QUATERNARY_TDM_RX_0:
  91         case QUATERNARY_TDM_TX_0:
  92                 ret = sdm845_tdm_snd_hw_params(substream, params);
  93                 break;
  94         default:
  95                 pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
  96                 break;
  97         }
  98         return ret;
  99 }
 100
 101 static int sdm845_snd_startup(struct snd_pcm_substream *substream)
 102 {
 103         unsigned int fmt = SND_SOC_DAIFMT_CBS_CFS;
 104         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 105         struct snd_soc_card *card = rtd->card;
 106         struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
 107         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 108
 109         switch (cpu_dai->id) {
 110         case PRIMARY_MI2S_RX:
 111         case PRIMARY_MI2S_TX:
 112                 if (++(data->pri_mi2s_clk_count) == 1) {
 113                         snd_soc_dai_set_sysclk(cpu_dai,
 114                                 Q6AFE_LPASS_CLK_ID_MCLK_1,
 115                                 DEFAULT_MCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
 116                         snd_soc_dai_set_sysclk(cpu_dai,
 117                                 Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
 118                                 DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
 119                 }
 120                 snd_soc_dai_set_fmt(cpu_dai, fmt);
 121                 break;
 122
 123         case QUATERNARY_TDM_RX_0:
 124         case QUATERNARY_TDM_TX_0:
 125                 if (++(data->quat_tdm_clk_count) == 1) {
 126                         snd_soc_dai_set_sysclk(cpu_dai,
 127                                 Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
 128                                 DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
 129                 }
 130                 break;
 131
 132         default:
 133                 pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
 134                 break;
 135         }
 136         return 0;
 137 }
 138
 139 static void  sdm845_snd_shutdown(struct snd_pcm_substream *substream)
 140 {
 141         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 142         struct snd_soc_card *card = rtd->card;
 143         struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
 144         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 145
 146         switch (cpu_dai->id) {
 147         case PRIMARY_MI2S_RX:
 148         case PRIMARY_MI2S_TX:
 149                 if (--(data->pri_mi2s_clk_count) == 0) {
 150                         snd_soc_dai_set_sysclk(cpu_dai,
 151                                 Q6AFE_LPASS_CLK_ID_MCLK_1,
 152                                 0, SNDRV_PCM_STREAM_PLAYBACK);
 153                         snd_soc_dai_set_sysclk(cpu_dai,
 154                                 Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
 155                                 0, SNDRV_PCM_STREAM_PLAYBACK);
 156                 };
 157                 break;
 158
 159         case QUATERNARY_TDM_RX_0:
 160         case QUATERNARY_TDM_TX_0:
 161                 if (--(data->quat_tdm_clk_count) == 0) {
 162                         snd_soc_dai_set_sysclk(cpu_dai,
 163                                 Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
 164                                 0, SNDRV_PCM_STREAM_PLAYBACK);
 165                 }
 166                 break;
 167
 168         default:
 169                 pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
 170                 break;
 171         }
 172 }
 173
 174 static struct snd_soc_ops sdm845_be_ops = {
 175         .hw_params = sdm845_snd_hw_params,
 176         .startup = sdm845_snd_startup,
 177         .shutdown = sdm845_snd_shutdown,
 178 };
 179
 180 static int sdm845_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 181                                 struct snd_pcm_hw_params *params)
 182 {
 183         struct snd_interval *rate = hw_param_interval(params,
 184                                         SNDRV_PCM_HW_PARAM_RATE);
 185         struct snd_interval *channels = hw_param_interval(params,
 186                                         SNDRV_PCM_HW_PARAM_CHANNELS);
 187         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 188
 189         rate->min = rate->max = DEFAULT_SAMPLE_RATE_48K;
 190         channels->min = channels->max = 2;
 191         snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
 192
 193         return 0;
 194 }
 195
 196 static void sdm845_add_be_ops(struct snd_soc_card *card)
 197 {
 198         struct snd_soc_dai_link *link = card->dai_link;
 199         int i, num_links = card->num_links;
 200
 201         for (i = 0; i < num_links; i++) {
 202                 if (link->no_pcm == 1) {
 203                         link->ops = &sdm845_be_ops;
 204                         link->be_hw_params_fixup = sdm845_be_hw_params_fixup;
 205                 }
 206                 link++;
 207         }
 208 }
 209
 210 static int sdm845_snd_platform_probe(struct platform_device *pdev)
 211 {
 212         struct snd_soc_card *card;
 213         struct sdm845_snd_data *data;
 214         struct device *dev = &pdev->dev;
 215         int ret;
 216
 217         card = kzalloc(sizeof(*card), GFP_KERNEL);
 218         if (!card)
 219                 return -ENOMEM;
 220
 221         /* Allocate the private data */
 222         data = kzalloc(sizeof(*data), GFP_KERNEL);
 223         if (!data) {
 224                 ret = -ENOMEM;
 225                 goto data_alloc_fail;
 226         }
 227
 228         card->dev = dev;
 229         card->owner = THIS_MODULE;
 230         dev_set_drvdata(dev, card);
 231         ret = qcom_snd_parse_of(card);
 232         if (ret) {
 233                 dev_err(dev, "Error parsing OF data\n");
 234                 goto parse_dt_fail;
 235         }
 236
 237         data->card = card;
 238         snd_soc_card_set_drvdata(card, data);
 239
 240         sdm845_add_be_ops(card);
 241         ret = snd_soc_register_card(card);
 242         if (ret) {
 243                 dev_err(dev, "Sound card registration failed\n");
 244                 goto register_card_fail;
 245         }
 246         return ret;
 247
 248 register_card_fail:
 249         kfree(card->dai_link);
 250 parse_dt_fail:
 251         kfree(data);
 252 data_alloc_fail:
 253         kfree(card);
 254         return ret;
 255 }
 256
 257 static int sdm845_snd_platform_remove(struct platform_device *pdev)
 258 {
 259         struct snd_soc_card *card = dev_get_drvdata(&pdev->dev);
 260         struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
 261
 262         snd_soc_unregister_card(card);
 263         kfree(card->dai_link);
 264         kfree(data);
 265         kfree(card);
 266         return 0;
 267 }
 268
 269 static const struct of_device_id sdm845_snd_device_id[]  = {
 270         { .compatible = "qcom,sdm845-sndcard" },
 271         {},
 272 };
 273 MODULE_DEVICE_TABLE(of, sdm845_snd_device_id);
 274
 275 static struct platform_driver sdm845_snd_driver = {
 276         .probe = sdm845_snd_platform_probe,
 277         .remove = sdm845_snd_platform_remove,
 278         .driver = {
 279                 .name = "msm-snd-sdm845",
 280                 .of_match_table = sdm845_snd_device_id,
 281         },
 282 };
 283 module_platform_driver(sdm845_snd_driver);
 284
 285 MODULE_DESCRIPTION("sdm845 ASoC Machine Driver");
 286 MODULE_LICENSE("GPL v2");