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         struct clk *codec_clk;
  37         unsigned int clk_frequency;
  38 };
  39
  40 struct imx_priv {
  41         struct platform_device *pdev;
  42 };
  43 static struct imx_priv card_priv;
  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 sample_rate = 44100;
  53 static snd_pcm_format_t sample_format = SNDRV_PCM_FORMAT_S16_LE;
  54
  55 static int imx_hifi_hw_params(struct snd_pcm_substream *substream,
  56                 struct snd_pcm_hw_params *params)
  57 {
  58         sample_rate = params_rate(params);
  59         sample_format = params_format(params);
  60
  61         return 0;
  62 }
  63
  64 static 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 = &card_priv;
  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 (sample_format == SNDRV_PCM_FORMAT_S24_LE)
  89                                 pll_out = sample_rate * 384;
  90                         else
  91                                 pll_out = 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 = &card_priv;
 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 imx_priv *priv = &card_priv;
 164         struct i2c_client *codec_dev;
 165         struct imx_wm8962_data *data;
 166         int int_port, ext_port;
 167         int ret;
 168
 169         priv->pdev = pdev;
 170
 171         ret = of_property_read_u32(np, "mux-int-port", &int_port);
 172         if (ret) {
 173                 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
 174                 return ret;
 175         }
 176         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 177         if (ret) {
 178                 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
 179                 return ret;
 180         }
 181
 182         /*
 183          * The port numbering in the hardware manual starts at 1, while
 184          * the audmux API expects it starts at 0.
 185          */
 186         int_port--;
 187         ext_port--;
 188         ret = imx_audmux_v2_configure_port(int_port,
 189                         IMX_AUDMUX_V2_PTCR_SYN |
 190                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 191                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 192                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 193                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
 194                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 195         if (ret) {
 196                 dev_err(&pdev->dev, "audmux internal port setup failed\n");
 197                 return ret;
 198         }
 199         ret = imx_audmux_v2_configure_port(ext_port,
 200                         IMX_AUDMUX_V2_PTCR_SYN,
 201                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 202         if (ret) {
 203                 dev_err(&pdev->dev, "audmux external port setup failed\n");
 204                 return ret;
 205         }
 206
 207         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
 208         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
 209         if (!ssi_np || !codec_np) {
 210                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 211                 ret = -EINVAL;
 212                 goto fail;
 213         }
 214
 215         ssi_pdev = of_find_device_by_node(ssi_np);
 216         if (!ssi_pdev) {
 217                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
 218                 ret = -EINVAL;
 219                 goto fail;
 220         }
 221         codec_dev = of_find_i2c_device_by_node(codec_np);
 222         if (!codec_dev || !codec_dev->dev.driver) {
 223                 dev_err(&pdev->dev, "failed to find codec platform device\n");
 224                 ret = -EINVAL;
 225                 goto fail;
 226         }
 227
 228         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 229         if (!data) {
 230                 ret = -ENOMEM;
 231                 goto fail;
 232         }
 233
 234         data->codec_clk = devm_clk_get(&codec_dev->dev, NULL);
 235         if (IS_ERR(data->codec_clk)) {
 236                 ret = PTR_ERR(data->codec_clk);
 237                 dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);
 238                 goto fail;
 239         }
 240
 241         data->clk_frequency = clk_get_rate(data->codec_clk);
 242         ret = clk_prepare_enable(data->codec_clk);
 243         if (ret) {
 244                 dev_err(&codec_dev->dev, "failed to enable codec clk: %d\n", ret);
 245                 goto fail;
 246         }
 247
 248         data->dai.name = "HiFi";
 249         data->dai.stream_name = "HiFi";
 250         data->dai.codec_dai_name = "wm8962";
 251         data->dai.codec_of_node = codec_np;
 252         data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
 253         data->dai.platform_of_node = ssi_np;
 254         data->dai.ops = &imx_hifi_ops;
 255         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 256                             SND_SOC_DAIFMT_CBM_CFM;
 257
 258         data->card.dev = &pdev->dev;
 259         ret = snd_soc_of_parse_card_name(&data->card, "model");
 260         if (ret)
 261                 goto clk_fail;
 262         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
 263         if (ret)
 264                 goto clk_fail;
 265         data->card.num_links = 1;
 266         data->card.owner = THIS_MODULE;
 267         data->card.dai_link = &data->dai;
 268         data->card.dapm_widgets = imx_wm8962_dapm_widgets;
 269         data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);
 270
 271         data->card.late_probe = imx_wm8962_late_probe;
 272         data->card.set_bias_level = imx_wm8962_set_bias_level;
 273
 274         platform_set_drvdata(pdev, &data->card);
 275         snd_soc_card_set_drvdata(&data->card, data);
 276
 277         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
 278         if (ret) {
 279                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 280                 goto clk_fail;
 281         }
 282
 283         of_node_put(ssi_np);
 284         of_node_put(codec_np);
 285
 286         return 0;
 287
 288 clk_fail:
 289         clk_disable_unprepare(data->codec_clk);
 290 fail:
 291         of_node_put(ssi_np);
 292         of_node_put(codec_np);
 293
 294         return ret;
 295 }
 296
 297 static int imx_wm8962_remove(struct platform_device *pdev)
 298 {
 299         struct snd_soc_card *card = platform_get_drvdata(pdev);
 300         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
 301
 302         if (!IS_ERR(data->codec_clk))
 303                 clk_disable_unprepare(data->codec_clk);
 304
 305         return 0;
 306 }
 307
 308 static const struct of_device_id imx_wm8962_dt_ids[] = {
 309         { .compatible = "fsl,imx-audio-wm8962", },
 310         { /* sentinel */ }
 311 };
 312 MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
 313
 314 static struct platform_driver imx_wm8962_driver = {
 315         .driver = {
 316                 .name = "imx-wm8962",
 317                 .pm = &snd_soc_pm_ops,
 318                 .of_match_table = imx_wm8962_dt_ids,
 319         },
 320         .probe = imx_wm8962_probe,
 321         .remove = imx_wm8962_remove,
 322 };
 323 module_platform_driver(imx_wm8962_driver);
 324
 325 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 326 MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
 327 MODULE_LICENSE("GPL v2");
 328 MODULE_ALIAS("platform:imx-wm8962");