kernel/sound/soc/fsl/imx-es8328.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/gpio.h>
  14 #include <linux/module.h>
  15 #include <linux/of.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/i2c.h>
  18 #include <linux/of_gpio.h>
  19 #include <sound/soc.h>
  20 #include <sound/jack.h>
  21
  22 #include "imx-audmux.h"
  23
  24 #define DAI_NAME_SIZE   32
  25 #define MUX_PORT_MAX    7
  26
  27 struct imx_es8328_data {
  28         struct device *dev;
  29         struct snd_soc_dai_link dai;
  30         struct snd_soc_card card;
  31         char codec_dai_name[DAI_NAME_SIZE];
  32         char platform_name[DAI_NAME_SIZE];
  33         int jack_gpio;
  34 };
  35
  36 static struct snd_soc_jack_gpio headset_jack_gpios[] = {
  37         {
  38                 .gpio = -1,
  39                 .name = "headset-gpio",
  40                 .report = SND_JACK_HEADSET,
  41                 .invert = 0,
  42                 .debounce_time = 200,
  43         },
  44 };
  45
  46 static struct snd_soc_jack headset_jack;
  47
  48 static int imx_es8328_dai_init(struct snd_soc_pcm_runtime *rtd)
  49 {
  50         struct imx_es8328_data *data = container_of(rtd->card,
  51                                         struct imx_es8328_data, card);
  52         int ret = 0;
  53
  54         /* Headphone jack detection */
  55         if (gpio_is_valid(data->jack_gpio)) {
  56                 ret = snd_soc_card_jack_new(rtd->card, "Headphone",
  57                                             SND_JACK_HEADPHONE | SND_JACK_BTN_0,
  58                                             &headset_jack, NULL, 0);
  59                 if (ret)
  60                         return ret;
  61
  62                 headset_jack_gpios[0].gpio = data->jack_gpio;
  63                 ret = snd_soc_jack_add_gpios(&headset_jack,
  64                                              ARRAY_SIZE(headset_jack_gpios),
  65                                              headset_jack_gpios);
  66         }
  67
  68         return ret;
  69 }
  70
  71 static const struct snd_soc_dapm_widget imx_es8328_dapm_widgets[] = {
  72         SND_SOC_DAPM_MIC("Mic Jack", NULL),
  73         SND_SOC_DAPM_HP("Headphone", NULL),
  74         SND_SOC_DAPM_SPK("Speaker", NULL),
  75         SND_SOC_DAPM_REGULATOR_SUPPLY("audio-amp", 1, 0),
  76 };
  77
  78 static int imx_es8328_probe(struct platform_device *pdev)
  79 {
  80         struct device_node *np = pdev->dev.of_node;
  81         struct device_node *ssi_np = NULL, *codec_np = NULL;
  82         struct platform_device *ssi_pdev;
  83         struct imx_es8328_data *data;
  84         u32 int_port, ext_port;
  85         int ret;
  86         struct device *dev = &pdev->dev;
  87
  88         ret = of_property_read_u32(np, "mux-int-port", &int_port);
  89         if (ret) {
  90                 dev_err(dev, "mux-int-port missing or invalid\n");
  91                 goto fail;
  92         }
  93         if (int_port > MUX_PORT_MAX || int_port == 0) {
  94                 dev_err(dev, "mux-int-port: hardware only has %d mux ports\n",
  95                         MUX_PORT_MAX);
  96                 goto fail;
  97         }
  98
  99         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 100         if (ret) {
 101                 dev_err(dev, "mux-ext-port missing or invalid\n");
 102                 goto fail;
 103         }
 104         if (ext_port > MUX_PORT_MAX || ext_port == 0) {
 105                 dev_err(dev, "mux-ext-port: hardware only has %d mux ports\n",
 106                         MUX_PORT_MAX);
 107                 ret = -EINVAL;
 108                 goto fail;
 109         }
 110
 111         /*
 112          * The port numbering in the hardware manual starts at 1, while
 113          * the audmux API expects it starts at 0.
 114          */
 115         int_port--;
 116         ext_port--;
 117         ret = imx_audmux_v2_configure_port(int_port,
 118                         IMX_AUDMUX_V2_PTCR_SYN |
 119                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 120                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 121                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 122                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
 123                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 124         if (ret) {
 125                 dev_err(dev, "audmux internal port setup failed\n");
 126                 return ret;
 127         }
 128         ret = imx_audmux_v2_configure_port(ext_port,
 129                         IMX_AUDMUX_V2_PTCR_SYN,
 130                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 131         if (ret) {
 132                 dev_err(dev, "audmux external port setup failed\n");
 133                 return ret;
 134         }
 135
 136         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
 137         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
 138         if (!ssi_np || !codec_np) {
 139                 dev_err(dev, "phandle missing or invalid\n");
 140                 ret = -EINVAL;
 141                 goto fail;
 142         }
 143
 144         ssi_pdev = of_find_device_by_node(ssi_np);
 145         if (!ssi_pdev) {
 146                 dev_err(dev, "failed to find SSI platform device\n");
 147                 ret = -EINVAL;
 148                 goto fail;
 149         }
 150
 151         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 152         if (!data) {
 153                 ret = -ENOMEM;
 154                 goto fail;
 155         }
 156
 157         data->dev = dev;
 158
 159         data->jack_gpio = of_get_named_gpio(pdev->dev.of_node, "jack-gpio", 0);
 160
 161         data->dai.name = "hifi";
 162         data->dai.stream_name = "hifi";
 163         data->dai.codec_dai_name = "es8328-hifi-analog";
 164         data->dai.codec_of_node = codec_np;
 165         data->dai.cpu_of_node = ssi_np;
 166         data->dai.platform_of_node = ssi_np;
 167         data->dai.init = &imx_es8328_dai_init;
 168         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 169                             SND_SOC_DAIFMT_CBM_CFM;
 170
 171         data->card.dev = dev;
 172         data->card.dapm_widgets = imx_es8328_dapm_widgets;
 173         data->card.num_dapm_widgets = ARRAY_SIZE(imx_es8328_dapm_widgets);
 174         ret = snd_soc_of_parse_card_name(&data->card, "model");
 175         if (ret) {
 176                 dev_err(dev, "Unable to parse card name\n");
 177                 goto fail;
 178         }
 179         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
 180         if (ret) {
 181                 dev_err(dev, "Unable to parse routing: %d\n", ret);
 182                 goto fail;
 183         }
 184         data->card.num_links = 1;
 185         data->card.owner = THIS_MODULE;
 186         data->card.dai_link = &data->dai;
 187
 188         ret = snd_soc_register_card(&data->card);
 189         if (ret) {
 190                 dev_err(dev, "Unable to register: %d\n", ret);
 191                 goto fail;
 192         }
 193
 194         platform_set_drvdata(pdev, data);
 195 fail:
 196         of_node_put(ssi_np);
 197         of_node_put(codec_np);
 198
 199         return ret;
 200 }
 201
 202 static int imx_es8328_remove(struct platform_device *pdev)
 203 {
 204         struct imx_es8328_data *data = platform_get_drvdata(pdev);
 205
 206         snd_soc_jack_free_gpios(&headset_jack, ARRAY_SIZE(headset_jack_gpios),
 207                                 headset_jack_gpios);
 208
 209         snd_soc_unregister_card(&data->card);
 210
 211         return 0;
 212 }
 213
 214 static const struct of_device_id imx_es8328_dt_ids[] = {
 215         { .compatible = "fsl,imx-audio-es8328", },
 216         { /* sentinel */ }
 217 };
 218 MODULE_DEVICE_TABLE(of, imx_es8328_dt_ids);
 219
 220 static struct platform_driver imx_es8328_driver = {
 221         .driver = {
 222                 .name = "imx-es8328",
 223                 .of_match_table = imx_es8328_dt_ids,
 224         },
 225         .probe = imx_es8328_probe,
 226         .remove = imx_es8328_remove,
 227 };
 228 module_platform_driver(imx_es8328_driver);
 229
 230 MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>");
 231 MODULE_DESCRIPTION("Kosagi i.MX6 ES8328 ASoC machine driver");
 232 MODULE_LICENSE("GPL v2");
 233 MODULE_ALIAS("platform:imx-audio-es8328");