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         if (!of_property_read_bool(np, "fsl,no-audmux")) {
  69                 ret = of_property_read_u32(np, "mux-int-port", &int_port);
  70                 if (ret) {
  71                         dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
  72                         return ret;
  73                 }
  74                 ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
  75                 if (ret) {
  76                         dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
  77                         return ret;
  78                 }
  79
  80                 /*
  81                  * The port numbering in the hardware manual starts at 1, while
  82                  * the audmux API expects it starts at 0.
  83                  */
  84                 int_port--;
  85                 ext_port--;
  86                 ret = imx_audmux_v2_configure_port(int_port,
  87                                 IMX_AUDMUX_V2_PTCR_SYN |
  88                                 IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
  89                                 IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
  90                                 IMX_AUDMUX_V2_PTCR_TFSDIR |
  91                                 IMX_AUDMUX_V2_PTCR_TCLKDIR,
  92                                 IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
  93                 if (ret) {
  94                         dev_err(&pdev->dev, "audmux internal port setup failed\n");
  95                         return ret;
  96                 }
  97                 ret = imx_audmux_v2_configure_port(ext_port,
  98                                 IMX_AUDMUX_V2_PTCR_SYN,
  99                                 IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 100                 if (ret) {
 101                         dev_err(&pdev->dev, "audmux external port setup failed\n");
 102                         return ret;
 103                 }
 104         }
 105
 106         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
 107         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
 108         if (!ssi_np || !codec_np) {
 109                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 110                 ret = -EINVAL;
 111                 goto fail;
 112         }
 113
 114         ssi_pdev = of_find_device_by_node(ssi_np);
 115         if (!ssi_pdev) {
 116                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
 117                 ret = -EPROBE_DEFER;
 118                 goto fail;
 119         }
 120         codec_dev = of_find_i2c_device_by_node(codec_np);
 121         if (!codec_dev) {
 122                 dev_err(&pdev->dev, "failed to find codec platform device\n");
 123                 return -EPROBE_DEFER;
 124         }
 125
 126         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 127         if (!data) {
 128                 ret = -ENOMEM;
 129                 goto fail;
 130         }
 131
 132         data->codec_clk = clk_get(&codec_dev->dev, NULL);
 133         if (IS_ERR(data->codec_clk)) {
 134                 ret = PTR_ERR(data->codec_clk);
 135                 goto fail;
 136         }
 137
 138         data->clk_frequency = clk_get_rate(data->codec_clk);
 139
 140         data->dai.name = "HiFi";
 141         data->dai.stream_name = "HiFi";
 142         data->dai.codec_dai_name = "sgtl5000";
 143         data->dai.codec_of_node = codec_np;
 144         data->dai.cpu_of_node = ssi_np;
 145         data->dai.platform_of_node = ssi_np;
 146         data->dai.init = &imx_sgtl5000_dai_init;
 147         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 148                             SND_SOC_DAIFMT_CBM_CFM;
 149
 150         data->card.dev = &pdev->dev;
 151         ret = snd_soc_of_parse_card_name(&data->card, "model");
 152         if (ret)
 153                 goto fail;
 154         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
 155         if (ret)
 156                 goto fail;
 157         data->card.num_links = 1;
 158         data->card.owner = THIS_MODULE;
 159         data->card.dai_link = &data->dai;
 160         data->card.dapm_widgets = imx_sgtl5000_dapm_widgets;
 161         data->card.num_dapm_widgets = ARRAY_SIZE(imx_sgtl5000_dapm_widgets);
 162
 163         platform_set_drvdata(pdev, &data->card);
 164         snd_soc_card_set_drvdata(&data->card, data);
 165
 166         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
 167         if (ret) {
 168                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 169                 goto fail;
 170         }
 171
 172         of_node_put(ssi_np);
 173         of_node_put(codec_np);
 174
 175         return 0;
 176
 177 fail:
 178         if (data && !IS_ERR(data->codec_clk))
 179                 clk_put(data->codec_clk);
 180         of_node_put(ssi_np);
 181         of_node_put(codec_np);
 182
 183         return ret;
 184 }
 185
 186 static int imx_sgtl5000_remove(struct platform_device *pdev)
 187 {
 188         struct snd_soc_card *card = platform_get_drvdata(pdev);
 189         struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(card);
 190
 191         clk_put(data->codec_clk);
 192
 193         return 0;
 194 }
 195
 196 static const struct of_device_id imx_sgtl5000_dt_ids[] = {
 197         { .compatible = "fsl,imx-audio-sgtl5000", },
 198         { /* sentinel */ }
 199 };
 200 MODULE_DEVICE_TABLE(of, imx_sgtl5000_dt_ids);
 201
 202 static struct platform_driver imx_sgtl5000_driver = {
 203         .driver = {
 204                 .name = "imx-sgtl5000",
 205                 .pm = &snd_soc_pm_ops,
 206                 .of_match_table = imx_sgtl5000_dt_ids,
 207         },
 208         .probe = imx_sgtl5000_probe,
 209         .remove = imx_sgtl5000_remove,
 210 };
 211 module_platform_driver(imx_sgtl5000_driver);
 212
 213 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
 214 MODULE_DESCRIPTION("Freescale i.MX SGTL5000 ASoC machine driver");
 215 MODULE_LICENSE("GPL v2");
 216 MODULE_ALIAS("platform:imx-sgtl5000");