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_dai *codec_dai = card->rtd[0].codec_dai;
  73         struct imx_priv *priv = &card_priv;
  74         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
  75         struct device *dev = &priv->pdev->dev;
  76         unsigned int pll_out;
  77         int ret;
  78
  79         if (dapm->dev != codec_dai->dev)
  80                 return 0;
  81
  82         switch (level) {
  83         case SND_SOC_BIAS_PREPARE:
  84                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
  85                         if (sample_format == SNDRV_PCM_FORMAT_S24_LE)
  86                                 pll_out = sample_rate * 384;
  87                         else
  88                                 pll_out = sample_rate * 256;
  89
  90                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
  91                                         WM8962_FLL_MCLK, data->clk_frequency,
  92                                         pll_out);
  93                         if (ret < 0) {
  94                                 dev_err(dev, "failed to start FLL: %d\n", ret);
  95                                 return ret;
  96                         }
  97
  98                         ret = snd_soc_dai_set_sysclk(codec_dai,
  99                                         WM8962_SYSCLK_FLL, pll_out,
 100                                         SND_SOC_CLOCK_IN);
 101                         if (ret < 0) {
 102                                 dev_err(dev, "failed to set SYSCLK: %d\n", ret);
 103                                 return ret;
 104                         }
 105                 }
 106                 break;
 107
 108         case SND_SOC_BIAS_STANDBY:
 109                 if (dapm->bias_level == SND_SOC_BIAS_PREPARE) {
 110                         ret = snd_soc_dai_set_sysclk(codec_dai,
 111                                         WM8962_SYSCLK_MCLK, data->clk_frequency,
 112                                         SND_SOC_CLOCK_IN);
 113                         if (ret < 0) {
 114                                 dev_err(dev,
 115                                         "failed to switch away from FLL: %d\n",
 116                                         ret);
 117                                 return ret;
 118                         }
 119
 120                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 121                                         0, 0, 0);
 122                         if (ret < 0) {
 123                                 dev_err(dev, "failed to stop FLL: %d\n", ret);
 124                                 return ret;
 125                         }
 126                 }
 127                 break;
 128
 129         default:
 130                 break;
 131         }
 132
 133         return 0;
 134 }
 135
 136 static int imx_wm8962_late_probe(struct snd_soc_card *card)
 137 {
 138         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
 139         struct imx_priv *priv = &card_priv;
 140         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
 141         struct device *dev = &priv->pdev->dev;
 142         int ret;
 143
 144         ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 145                         data->clk_frequency, SND_SOC_CLOCK_IN);
 146         if (ret < 0)
 147                 dev_err(dev, "failed to set sysclk in %s\n", __func__);
 148
 149         return ret;
 150 }
 151
 152 static int imx_wm8962_probe(struct platform_device *pdev)
 153 {
 154         struct device_node *np = pdev->dev.of_node;
 155         struct device_node *ssi_np, *codec_np;
 156         struct platform_device *ssi_pdev;
 157         struct imx_priv *priv = &card_priv;
 158         struct i2c_client *codec_dev;
 159         struct imx_wm8962_data *data;
 160         int int_port, ext_port;
 161         int ret;
 162
 163         priv->pdev = pdev;
 164
 165         ret = of_property_read_u32(np, "mux-int-port", &int_port);
 166         if (ret) {
 167                 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
 168                 return ret;
 169         }
 170         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 171         if (ret) {
 172                 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
 173                 return ret;
 174         }
 175
 176         /*
 177          * The port numbering in the hardware manual starts at 1, while
 178          * the audmux API expects it starts at 0.
 179          */
 180         int_port--;
 181         ext_port--;
 182         ret = imx_audmux_v2_configure_port(int_port,
 183                         IMX_AUDMUX_V2_PTCR_SYN |
 184                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 185                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 186                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 187                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
 188                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 189         if (ret) {
 190                 dev_err(&pdev->dev, "audmux internal port setup failed\n");
 191                 return ret;
 192         }
 193         imx_audmux_v2_configure_port(ext_port,
 194                         IMX_AUDMUX_V2_PTCR_SYN,
 195                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 196         if (ret) {
 197                 dev_err(&pdev->dev, "audmux external port setup failed\n");
 198                 return ret;
 199         }
 200
 201         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
 202         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
 203         if (!ssi_np || !codec_np) {
 204                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 205                 ret = -EINVAL;
 206                 goto fail;
 207         }
 208
 209         ssi_pdev = of_find_device_by_node(ssi_np);
 210         if (!ssi_pdev) {
 211                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
 212                 ret = -EINVAL;
 213                 goto fail;
 214         }
 215         codec_dev = of_find_i2c_device_by_node(codec_np);
 216         if (!codec_dev || !codec_dev->dev.driver) {
 217                 dev_err(&pdev->dev, "failed to find codec platform device\n");
 218                 ret = -EINVAL;
 219                 goto fail;
 220         }
 221
 222         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 223         if (!data) {
 224                 ret = -ENOMEM;
 225                 goto fail;
 226         }
 227
 228         data->codec_clk = devm_clk_get(&codec_dev->dev, NULL);
 229         if (IS_ERR(data->codec_clk)) {
 230                 ret = PTR_ERR(data->codec_clk);
 231                 dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);
 232                 goto fail;
 233         }
 234
 235         data->clk_frequency = clk_get_rate(data->codec_clk);
 236         ret = clk_prepare_enable(data->codec_clk);
 237         if (ret) {
 238                 dev_err(&codec_dev->dev, "failed to enable codec clk: %d\n", ret);
 239                 goto fail;
 240         }
 241
 242         data->dai.name = "HiFi";
 243         data->dai.stream_name = "HiFi";
 244         data->dai.codec_dai_name = "wm8962";
 245         data->dai.codec_of_node = codec_np;
 246         data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
 247         data->dai.platform_of_node = ssi_np;
 248         data->dai.ops = &imx_hifi_ops;
 249         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 250                             SND_SOC_DAIFMT_CBM_CFM;
 251
 252         data->card.dev = &pdev->dev;
 253         ret = snd_soc_of_parse_card_name(&data->card, "model");
 254         if (ret)
 255                 goto clk_fail;
 256         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
 257         if (ret)
 258                 goto clk_fail;
 259         data->card.num_links = 1;
 260         data->card.dai_link = &data->dai;
 261         data->card.dapm_widgets = imx_wm8962_dapm_widgets;
 262         data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);
 263
 264         data->card.late_probe = imx_wm8962_late_probe;
 265         data->card.set_bias_level = imx_wm8962_set_bias_level;
 266
 267         platform_set_drvdata(pdev, &data->card);
 268         snd_soc_card_set_drvdata(&data->card, data);
 269
 270         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
 271         if (ret) {
 272                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 273                 goto clk_fail;
 274         }
 275
 276         of_node_put(ssi_np);
 277         of_node_put(codec_np);
 278
 279         return 0;
 280
 281 clk_fail:
 282         clk_disable_unprepare(data->codec_clk);
 283 fail:
 284         of_node_put(ssi_np);
 285         of_node_put(codec_np);
 286
 287         return ret;
 288 }
 289
 290 static int imx_wm8962_remove(struct platform_device *pdev)
 291 {
 292         struct snd_soc_card *card = platform_get_drvdata(pdev);
 293         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
 294
 295         if (!IS_ERR(data->codec_clk))
 296                 clk_disable_unprepare(data->codec_clk);
 297
 298         return 0;
 299 }
 300
 301 static const struct of_device_id imx_wm8962_dt_ids[] = {
 302         { .compatible = "fsl,imx-audio-wm8962", },
 303         { /* sentinel */ }
 304 };
 305 MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
 306
 307 static struct platform_driver imx_wm8962_driver = {
 308         .driver = {
 309                 .name = "imx-wm8962",
 310                 .pm = &snd_soc_pm_ops,
 311                 .of_match_table = imx_wm8962_dt_ids,
 312         },
 313         .probe = imx_wm8962_probe,
 314         .remove = imx_wm8962_remove,
 315 };
 316 module_platform_driver(imx_wm8962_driver);
 317
 318 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 319 MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
 320 MODULE_LICENSE("GPL v2");
 321 MODULE_ALIAS("platform:imx-wm8962");