kernel/sound/soc/fsl/imx-sgtl5000.c

   1 /*
   2  * Copyright 2012 Freescale Semiconductor, Inc.
   3  * Copyright 2012 Linaro Ltd.
   4  *
   5  * The code contained herein is licensed under the GNU General Public
   6  * License. You may obtain a copy of the GNU General Public License
   7  * Version 2 or later at the following locations:
   8  *
   9  * http://www.opensource.org/licenses/gpl-license.html
  10  * http://www.gnu.org/copyleft/gpl.html
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/of.h>
  15 #include <linux/of_platform.h>
  16 #include <linux/i2c.h>
  17 #include <linux/clk.h>
  18 #include <sound/soc.h>
  19
  20 #include "../codecs/sgtl5000.h"
  21 #include "imx-audmux.h"
  22
  23 #define DAI_NAME_SIZE   32
  24
  25 struct imx_sgtl5000_data {
  26         struct snd_soc_dai_link dai;
  27         struct snd_soc_card card;
  28         char codec_dai_name[DAI_NAME_SIZE];
  29         char platform_name[DAI_NAME_SIZE];
  30         struct clk *codec_clk;
  31         unsigned int clk_frequency;
  32 };
  33
  34 static int imx_sgtl5000_dai_init(struct snd_soc_pcm_runtime *rtd)
  35 {
  36         struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(rtd->card);
  37         struct device *dev = rtd->card->dev;
  38         int ret;
  39
  40         ret = snd_soc_dai_set_sysclk(rtd->codec_dai, SGTL5000_SYSCLK,
  41                                      data->clk_frequency, SND_SOC_CLOCK_IN);
  42         if (ret) {
  43                 dev_err(dev, "could not set codec driver clock params\n");
  44                 return ret;
  45         }
  46
  47         return 0;
  48 }
  49
  50 static const struct snd_soc_dapm_widget imx_sgtl5000_dapm_widgets[] = {
  51         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  52         SND_SOC_DAPM_LINE("Line In Jack", NULL),
  53         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  54         SND_SOC_DAPM_SPK("Line Out Jack", NULL),
  55         SND_SOC_DAPM_SPK("Ext Spk", NULL),
  56 };
  57
  58 static int imx_sgtl5000_probe(struct platform_device *pdev)
  59 {
  60         struct device_node *np = pdev->dev.of_node;
  61         struct device_node *ssi_np, *codec_np;
  62         struct platform_device *ssi_pdev;
  63         struct i2c_client *codec_dev;
  64         struct imx_sgtl5000_data *data = NULL;
  65         int int_port, ext_port;
  66         int ret;
  67
  68         ret = of_property_read_u32(np, "mux-int-port", &int_port);
  69         if (ret) {
  70                 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
  71                 return ret;
  72         }
  73         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
  74         if (ret) {
  75                 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
  76                 return ret;
  77         }
  78
  79         /*
  80          * The port numbering in the hardware manual starts at 1, while
  81          * the audmux API expects it starts at 0.
  82          */
  83         int_port--;
  84         ext_port--;
  85         ret = imx_audmux_v2_configure_port(int_port,
  86                         IMX_AUDMUX_V2_PTCR_SYN |
  87                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
  88                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
  89                         IMX_AUDMUX_V2_PTCR_TFSDIR |
  90                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
  91                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
  92         if (ret) {
  93                 dev_err(&pdev->dev, "audmux internal port setup failed\n");
  94                 return ret;
  95         }
  96         ret = imx_audmux_v2_configure_port(ext_port,
  97                         IMX_AUDMUX_V2_PTCR_SYN,
  98                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
  99         if (ret) {
 100                 dev_err(&pdev->dev, "audmux external port setup failed\n");
 101                 return ret;
 102         }
 103
 104         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
 105         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
 106         if (!ssi_np || !codec_np) {
 107                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 108                 ret = -EINVAL;
 109                 goto fail;
 110         }
 111
 112         ssi_pdev = of_find_device_by_node(ssi_np);
 113         if (!ssi_pdev) {
 114                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
 115                 ret = -EPROBE_DEFER;
 116                 goto fail;
 117         }
 118         codec_dev = of_find_i2c_device_by_node(codec_np);
 119         if (!codec_dev) {
 120                 dev_err(&pdev->dev, "failed to find codec platform device\n");
 121                 return -EPROBE_DEFER;
 122         }
 123
 124         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 125         if (!data) {
 126                 ret = -ENOMEM;
 127                 goto fail;
 128         }
 129
 130         data->codec_clk = clk_get(&codec_dev->dev, NULL);
 131         if (IS_ERR(data->codec_clk)) {
 132                 ret = PTR_ERR(data->codec_clk);
 133                 goto fail;
 134         }
 135
 136         data->clk_frequency = clk_get_rate(data->codec_clk);
 137
 138         data->dai.name = "HiFi";
 139         data->dai.stream_name = "HiFi";
 140         data->dai.codec_dai_name = "sgtl5000";
 141         data->dai.codec_of_node = codec_np;
 142         data->dai.cpu_of_node = ssi_np;
 143         data->dai.platform_of_node = ssi_np;
 144         data->dai.init = &imx_sgtl5000_dai_init;
 145         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 146                             SND_SOC_DAIFMT_CBM_CFM;
 147
 148         data->card.dev = &pdev->dev;
 149         ret = snd_soc_of_parse_card_name(&data->card, "model");
 150         if (ret)
 151                 goto fail;
 152         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
 153         if (ret)
 154                 goto fail;
 155         data->card.num_links = 1;
 156         data->card.owner = THIS_MODULE;
 157         data->card.dai_link = &data->dai;
 158         data->card.dapm_widgets = imx_sgtl5000_dapm_widgets;
 159         data->card.num_dapm_widgets = ARRAY_SIZE(imx_sgtl5000_dapm_widgets);
 160
 161         platform_set_drvdata(pdev, &data->card);
 162         snd_soc_card_set_drvdata(&data->card, data);
 163
 164         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
 165         if (ret) {
 166                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 167                 goto fail;
 168         }
 169
 170         of_node_put(ssi_np);
 171         of_node_put(codec_np);
 172
 173         return 0;
 174
 175 fail:
 176         if (data && !IS_ERR(data->codec_clk))
 177                 clk_put(data->codec_clk);
 178         of_node_put(ssi_np);
 179         of_node_put(codec_np);
 180
 181         return ret;
 182 }
 183
 184 static int imx_sgtl5000_remove(struct platform_device *pdev)
 185 {
 186         struct snd_soc_card *card = platform_get_drvdata(pdev);
 187         struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(card);
 188
 189         clk_put(data->codec_clk);
 190
 191         return 0;
 192 }
 193
 194 static const struct of_device_id imx_sgtl5000_dt_ids[] = {
 195         { .compatible = "fsl,imx-audio-sgtl5000", },
 196         { /* sentinel */ }
 197 };
 198 MODULE_DEVICE_TABLE(of, imx_sgtl5000_dt_ids);
 199
 200 static struct platform_driver imx_sgtl5000_driver = {
 201         .driver = {
 202                 .name = "imx-sgtl5000",
 203                 .pm = &snd_soc_pm_ops,
 204                 .of_match_table = imx_sgtl5000_dt_ids,
 205         },
 206         .probe = imx_sgtl5000_probe,
 207         .remove = imx_sgtl5000_remove,
 208 };
 209 module_platform_driver(imx_sgtl5000_driver);
 210
 211 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
 212 MODULE_DESCRIPTION("Freescale i.MX SGTL5000 ASoC machine driver");
 213 MODULE_LICENSE("GPL v2");
 214 MODULE_ALIAS("platform:imx-sgtl5000");