sound/soc/fsl/imx-wm8962.c

   1 /*
   2  * Copyright 2013 Freescale Semiconductor, Inc.
   3  *
   4  * Based on imx-sgtl5000.c
   5  * Copyright 2012 Freescale Semiconductor, Inc.
   6  * Copyright 2012 Linaro Ltd.
   7  *
   8  * The code contained herein is licensed under the GNU General Public
   9  * License. You may obtain a copy of the GNU General Public License
  10  * Version 2 or later at the following locations:
  11  *
  12  * http://www.opensource.org/licenses/gpl-license.html
  13  * http://www.gnu.org/copyleft/gpl.html
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/of_platform.h>
  18 #include <linux/i2c.h>
  19 #include <linux/slab.h>
  20 #include <linux/clk.h>
  21 #include <sound/soc.h>
  22 #include <sound/pcm_params.h>
  23 #include <sound/soc-dapm.h>
  24 #include <linux/pinctrl/consumer.h>
  25
  26 #include "../codecs/wm8962.h"
  27 #include "imx-audmux.h"
  28
  29 #define DAI_NAME_SIZE   32
  30
  31 struct imx_wm8962_data {
  32         struct snd_soc_dai_link dai;
  33         struct snd_soc_card card;
  34         char codec_dai_name[DAI_NAME_SIZE];
  35         char platform_name[DAI_NAME_SIZE];
  36         unsigned int clk_frequency;
  37 };
  38
  39 struct imx_priv {
  40         struct platform_device *pdev;
  41         int sample_rate;
  42         snd_pcm_format_t sample_format;
  43 };
  44
  45 static const struct snd_soc_dapm_widget imx_wm8962_dapm_widgets[] = {
  46         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  47         SND_SOC_DAPM_SPK("Ext Spk", NULL),
  48         SND_SOC_DAPM_MIC("AMIC", NULL),
  49         SND_SOC_DAPM_MIC("DMIC", NULL),
  50 };
  51
  52 static int imx_hifi_hw_params(struct snd_pcm_substream *substream,
  53                 struct snd_pcm_hw_params *params)
  54 {
  55         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  56         struct imx_priv *priv = snd_soc_card_get_drvdata(rtd->card);
  57
  58         priv->sample_rate = params_rate(params);
  59         priv->sample_format = params_format(params);
  60
  61         return 0;
  62 }
  63
  64 static const struct snd_soc_ops imx_hifi_ops = {
  65         .hw_params = imx_hifi_hw_params,
  66 };
  67
  68 static int imx_wm8962_set_bias_level(struct snd_soc_card *card,
  69                                         struct snd_soc_dapm_context *dapm,
  70                                         enum snd_soc_bias_level level)
  71 {
  72         struct snd_soc_pcm_runtime *rtd;
  73         struct snd_soc_dai *codec_dai;
  74         struct imx_priv *priv = snd_soc_card_get_drvdata(card);
  75         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
  76         struct device *dev = &priv->pdev->dev;
  77         unsigned int pll_out;
  78         int ret;
  79
  80         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
  81         codec_dai = rtd->codec_dai;
  82         if (dapm->dev != codec_dai->dev)
  83                 return 0;
  84
  85         switch (level) {
  86         case SND_SOC_BIAS_PREPARE:
  87                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
  88                         if (priv->sample_format == SNDRV_PCM_FORMAT_S24_LE)
  89                                 pll_out = priv->sample_rate * 384;
  90                         else
  91                                 pll_out = priv->sample_rate * 256;
  92
  93                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  94                                         WM8962_FLL_MCLK, data->clk_frequency,
  95                                         pll_out);
  96                         if (ret < 0) {
  97                                 dev_err(dev, "failed to start FLL: %d\n", ret);
  98                                 return ret;
  99                         }
 100
 101                         ret = snd_soc_dai_set_sysclk(codec_dai,
 102                                         WM8962_SYSCLK_FLL, pll_out,
 103                                         SND_SOC_CLOCK_IN);
 104                         if (ret < 0) {
 105                                 dev_err(dev, "failed to set SYSCLK: %d\n", ret);
 106                                 return ret;
 107                         }
 108                 }
 109                 break;
 110
 111         case SND_SOC_BIAS_STANDBY:
 112                 if (dapm->bias_level == SND_SOC_BIAS_PREPARE) {
 113                         ret = snd_soc_dai_set_sysclk(codec_dai,
 114                                         WM8962_SYSCLK_MCLK, data->clk_frequency,
 115                                         SND_SOC_CLOCK_IN);
 116                         if (ret < 0) {
 117                                 dev_err(dev,
 118                                         "failed to switch away from FLL: %d\n",
 119                                         ret);
 120                                 return ret;
 121                         }
 122
 123                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 124                                         0, 0, 0);
 125                         if (ret < 0) {
 126                                 dev_err(dev, "failed to stop FLL: %d\n", ret);
 127                                 return ret;
 128                         }
 129                 }
 130                 break;
 131
 132         default:
 133                 break;
 134         }
 135
 136         return 0;
 137 }
 138
 139 static int imx_wm8962_late_probe(struct snd_soc_card *card)
 140 {
 141         struct snd_soc_pcm_runtime *rtd;
 142         struct snd_soc_dai *codec_dai;
 143         struct imx_priv *priv = snd_soc_card_get_drvdata(card);
 144         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
 145         struct device *dev = &priv->pdev->dev;
 146         int ret;
 147
 148         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 149         codec_dai = rtd->codec_dai;
 150         ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 151                         data->clk_frequency, SND_SOC_CLOCK_IN);
 152         if (ret < 0)
 153                 dev_err(dev, "failed to set sysclk in %s\n", __func__);
 154
 155         return ret;
 156 }
 157
 158 static int imx_wm8962_probe(struct platform_device *pdev)
 159 {
 160         struct device_node *np = pdev->dev.of_node;
 161         struct device_node *ssi_np, *codec_np;
 162         struct platform_device *ssi_pdev;
 163         struct i2c_client *codec_dev;
 164         struct imx_wm8962_data *data;
 165         struct imx_priv *priv;
 166         struct clk *codec_clk;
 167         int int_port, ext_port;
 168         int ret;
 169
 170         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 171         if (!priv)
 172                 return -ENOMEM;
 173
 174         priv->pdev = pdev;
 175         priv->sample_rate = 44100;
 176         priv->sample_format = SNDRV_PCM_FORMAT_S16_LE;
 177
 178         ret = of_property_read_u32(np, "mux-int-port", &int_port);
 179         if (ret) {
 180                 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
 181                 return ret;
 182         }
 183         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 184         if (ret) {
 185                 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
 186                 return ret;
 187         }
 188
 189         /*
 190          * The port numbering in the hardware manual starts at 1, while
 191          * the audmux API expects it starts at 0.
 192          */
 193         int_port--;
 194         ext_port--;
 195         ret = imx_audmux_v2_configure_port(int_port,
 196                         IMX_AUDMUX_V2_PTCR_SYN |
 197                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 198                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 199                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 200                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
 201                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 202         if (ret) {
 203                 dev_err(&pdev->dev, "audmux internal port setup failed\n");
 204                 return ret;
 205         }
 206         ret = imx_audmux_v2_configure_port(ext_port,
 207                         IMX_AUDMUX_V2_PTCR_SYN,
 208                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 209         if (ret) {
 210                 dev_err(&pdev->dev, "audmux external port setup failed\n");
 211                 return ret;
 212         }
 213
 214         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
 215         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
 216         if (!ssi_np || !codec_np) {
 217                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 218                 ret = -EINVAL;
 219                 goto fail;
 220         }
 221
 222         ssi_pdev = of_find_device_by_node(ssi_np);
 223         if (!ssi_pdev) {
 224                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
 225                 ret = -EINVAL;
 226                 goto fail;
 227         }
 228         codec_dev = of_find_i2c_device_by_node(codec_np);
 229         if (!codec_dev || !codec_dev->dev.driver) {
 230                 dev_err(&pdev->dev, "failed to find codec platform device\n");
 231                 ret = -EINVAL;
 232                 goto fail;
 233         }
 234
 235         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 236         if (!data) {
 237                 ret = -ENOMEM;
 238                 goto fail;
 239         }
 240
 241         codec_clk = clk_get(&codec_dev->dev, NULL);
 242         if (IS_ERR(codec_clk)) {
 243                 ret = PTR_ERR(codec_clk);
 244                 dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);
 245                 goto fail;
 246         }
 247
 248         data->clk_frequency = clk_get_rate(codec_clk);
 249         clk_put(codec_clk);
 250
 251         data->dai.name = "HiFi";
 252         data->dai.stream_name = "HiFi";
 253         data->dai.codec_dai_name = "wm8962";
 254         data->dai.codec_of_node = codec_np;
 255         data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
 256         data->dai.platform_of_node = ssi_np;
 257         data->dai.ops = &imx_hifi_ops;
 258         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 259                             SND_SOC_DAIFMT_CBM_CFM;
 260
 261         data->card.dev = &pdev->dev;
 262         ret = snd_soc_of_parse_card_name(&data->card, "model");
 263         if (ret)
 264                 goto fail;
 265         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
 266         if (ret)
 267                 goto fail;
 268         data->card.num_links = 1;
 269         data->card.owner = THIS_MODULE;
 270         data->card.dai_link = &data->dai;
 271         data->card.dapm_widgets = imx_wm8962_dapm_widgets;
 272         data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);
 273
 274         data->card.late_probe = imx_wm8962_late_probe;
 275         data->card.set_bias_level = imx_wm8962_set_bias_level;
 276
 277         platform_set_drvdata(pdev, &data->card);
 278         snd_soc_card_set_drvdata(&data->card, data);
 279
 280         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
 281         if (ret) {
 282                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 283                 goto fail;
 284         }
 285
 286 fail:
 287         of_node_put(ssi_np);
 288         of_node_put(codec_np);
 289
 290         return ret;
 291 }
 292
 293 static const struct of_device_id imx_wm8962_dt_ids[] = {
 294         { .compatible = "fsl,imx-audio-wm8962", },
 295         { /* sentinel */ }
 296 };
 297 MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
 298
 299 static struct platform_driver imx_wm8962_driver = {
 300         .driver = {
 301                 .name = "imx-wm8962",
 302                 .pm = &snd_soc_pm_ops,
 303                 .of_match_table = imx_wm8962_dt_ids,
 304         },
 305         .probe = imx_wm8962_probe,
 306 };
 307 module_platform_driver(imx_wm8962_driver);
 308
 309 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 310 MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
 311 MODULE_LICENSE("GPL v2");
 312 MODULE_ALIAS("platform:imx-wm8962");