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/of_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 = container_of(rtd->card,
  37                                         struct imx_sgtl5000_data, card);
  38         struct device *dev = rtd->card->dev;
  39         int ret;
  40
  41         ret = snd_soc_dai_set_sysclk(rtd->codec_dai, SGTL5000_SYSCLK,
  42                                      data->clk_frequency, SND_SOC_CLOCK_IN);
  43         if (ret) {
  44                 dev_err(dev, "could not set codec driver clock params\n");
  45                 return ret;
  46         }
  47
  48         return 0;
  49 }
  50
  51 static const struct snd_soc_dapm_widget imx_sgtl5000_dapm_widgets[] = {
  52         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  53         SND_SOC_DAPM_LINE("Line In Jack", NULL),
  54         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  55         SND_SOC_DAPM_SPK("Line Out Jack", NULL),
  56         SND_SOC_DAPM_SPK("Ext Spk", NULL),
  57 };
  58
  59 static int __devinit imx_sgtl5000_probe(struct platform_device *pdev)
  60 {
  61         struct device_node *np = pdev->dev.of_node;
  62         struct device_node *ssi_np, *codec_np;
  63         struct platform_device *ssi_pdev;
  64         struct i2c_client *codec_dev;
  65         struct imx_sgtl5000_data *data;
  66         int int_port, ext_port;
  67         int ret;
  68
  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         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
 106         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
 107         if (!ssi_np || !codec_np) {
 108                 dev_err(&pdev->dev, "phandle missing or invalid\n");
 109                 ret = -EINVAL;
 110                 goto fail;
 111         }
 112
 113         ssi_pdev = of_find_device_by_node(ssi_np);
 114         if (!ssi_pdev) {
 115                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
 116                 ret = -EINVAL;
 117                 goto fail;
 118         }
 119         codec_dev = of_find_i2c_device_by_node(codec_np);
 120         if (!codec_dev) {
 121                 dev_err(&pdev->dev, "failed to find codec platform device\n");
 122                 return -EINVAL;
 123         }
 124
 125         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 126         if (!data) {
 127                 ret = -ENOMEM;
 128                 goto fail;
 129         }
 130
 131         data->codec_clk = clk_get(&codec_dev->dev, NULL);
 132         if (IS_ERR(data->codec_clk)) {
 133                 /* assuming clock enabled by default */
 134                 data->codec_clk = NULL;
 135                 ret = of_property_read_u32(codec_np, "clock-frequency",
 136                                         &data->clk_frequency);
 137                 if (ret) {
 138                         dev_err(&codec_dev->dev,
 139                                 "clock-frequency missing or invalid\n");
 140                         goto fail;
 141                 }
 142         } else {
 143                 data->clk_frequency = clk_get_rate(data->codec_clk);
 144                 clk_prepare_enable(data->codec_clk);
 145         }
 146
 147         data->dai.name = "HiFi";
 148         data->dai.stream_name = "HiFi";
 149         data->dai.codec_dai_name = "sgtl5000";
 150         data->dai.codec_of_node = codec_np;
 151         data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
 152         data->dai.platform_name = "imx-pcm-audio";
 153         data->dai.init = &imx_sgtl5000_dai_init;
 154         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 155                             SND_SOC_DAIFMT_CBM_CFM;
 156
 157         data->card.dev = &pdev->dev;
 158         ret = snd_soc_of_parse_card_name(&data->card, "model");
 159         if (ret)
 160                 goto clk_fail;
 161         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
 162         if (ret)
 163                 goto clk_fail;
 164         data->card.num_links = 1;
 165         data->card.dai_link = &data->dai;
 166         data->card.dapm_widgets = imx_sgtl5000_dapm_widgets;
 167         data->card.num_dapm_widgets = ARRAY_SIZE(imx_sgtl5000_dapm_widgets);
 168
 169         ret = snd_soc_register_card(&data->card);
 170         if (ret) {
 171                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 172                 goto clk_fail;
 173         }
 174
 175         platform_set_drvdata(pdev, data);
 176 clk_fail:
 177         clk_put(data->codec_clk);
 178 fail:
 179         if (ssi_np)
 180                 of_node_put(ssi_np);
 181         if (codec_np)
 182                 of_node_put(codec_np);
 183
 184         return ret;
 185 }
 186
 187 static int __devexit imx_sgtl5000_remove(struct platform_device *pdev)
 188 {
 189         struct imx_sgtl5000_data *data = platform_get_drvdata(pdev);
 190
 191         if (data->codec_clk) {
 192                 clk_disable_unprepare(data->codec_clk);
 193                 clk_put(data->codec_clk);
 194         }
 195         snd_soc_unregister_card(&data->card);
 196
 197         return 0;
 198 }
 199
 200 static const struct of_device_id imx_sgtl5000_dt_ids[] = {
 201         { .compatible = "fsl,imx-audio-sgtl5000", },
 202         { /* sentinel */ }
 203 };
 204 MODULE_DEVICE_TABLE(of, imx_sgtl5000_dt_ids);
 205
 206 static struct platform_driver imx_sgtl5000_driver = {
 207         .driver = {
 208                 .name = "imx-sgtl5000",
 209                 .owner = THIS_MODULE,
 210                 .of_match_table = imx_sgtl5000_dt_ids,
 211         },
 212         .probe = imx_sgtl5000_probe,
 213         .remove = __devexit_p(imx_sgtl5000_remove),
 214 };
 215 module_platform_driver(imx_sgtl5000_driver);
 216
 217 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
 218 MODULE_DESCRIPTION("Freescale i.MX SGTL5000 ASoC machine driver");
 219 MODULE_LICENSE("GPL v2");
 220 MODULE_ALIAS("platform:imx-sgtl5000");