diff options
Diffstat (limited to 'sound/soc/tegra/tegra_wm9712.c')
| -rw-r--r-- | sound/soc/tegra/tegra_wm9712.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra_wm9712.c b/sound/soc/tegra/tegra_wm9712.c new file mode 100644 index 00000000000..68d42403d9b --- /dev/null +++ b/sound/soc/tegra/tegra_wm9712.c @@ -0,0 +1,176 @@ +/* + * tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec. + * + * Copyright 2012 Lucas Stach <dev@lynxeye.de> + * + * Partly based on code copyright/by: + * Copyright 2011,2012 Toradex Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> + +#include <sound/core.h> +#include <sound/jack.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#define DRV_NAME "tegra-snd-wm9712" + +struct tegra_wm9712 { + struct platform_device *codec; +}; + +static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = { + SND_SOC_DAPM_HP("Headphone", NULL), + SND_SOC_DAPM_LINE("LineIn", NULL), + SND_SOC_DAPM_MIC("Mic", NULL), +}; + +static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_dai *codec_dai = rtd->codec_dai; + struct snd_soc_codec *codec = codec_dai->codec; + struct snd_soc_dapm_context *dapm = &codec->dapm; + + snd_soc_dapm_force_enable_pin(dapm, "Mic Bias"); + + return snd_soc_dapm_sync(dapm); +} + +static struct snd_soc_dai_link tegra_wm9712_dai = { + .name = "AC97 HiFi", + .stream_name = "AC97 HiFi", + .cpu_dai_name = "tegra-ac97-pcm", + .codec_dai_name = "wm9712-hifi", + .codec_name = "wm9712-codec", + .init = tegra_wm9712_init, +}; + +static struct snd_soc_card snd_soc_tegra_wm9712 = { + .name = "tegra-wm9712", + .owner = THIS_MODULE, + .dai_link = &tegra_wm9712_dai, + .num_links = 1, + + .dapm_widgets = tegra_wm9712_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets), + .fully_routed = true, +}; + +static int tegra_wm9712_driver_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct snd_soc_card *card = &snd_soc_tegra_wm9712; + struct tegra_wm9712 *machine; + int ret; + + if (!pdev->dev.of_node) { + dev_err(&pdev->dev, "No platform data supplied\n"); + return -EINVAL; + } + + machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712), + GFP_KERNEL); + if (!machine) { + dev_err(&pdev->dev, "Can't allocate tegra_wm9712 struct\n"); + return -ENOMEM; + } + + card->dev = &pdev->dev; + platform_set_drvdata(pdev, card); + snd_soc_card_set_drvdata(card, machine); + + machine->codec = platform_device_alloc("wm9712-codec", -1); + if (!machine->codec) { + dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n"); + return -ENOMEM; + } + + ret = platform_device_add(machine->codec); + if (ret) + goto codec_put; + + ret = snd_soc_of_parse_card_name(card, "nvidia,model"); + if (ret) + goto codec_unregister; + + ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing"); + if (ret) + goto codec_unregister; + + tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np, + "nvidia,ac97-controller", 0); + if (!tegra_wm9712_dai.cpu_of_node) { + dev_err(&pdev->dev, + "Property 'nvidia,ac97-controller' missing or invalid\n"); + ret = -EINVAL; + goto codec_unregister; + } + + tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node; + + ret = snd_soc_register_card(card); + if (ret) { + dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", + ret); + goto codec_unregister; + } + + return 0; + +codec_unregister: + platform_device_del(machine->codec); +codec_put: + platform_device_put(machine->codec); + return ret; +} + +static int tegra_wm9712_driver_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card); + + snd_soc_unregister_card(card); + + platform_device_unregister(machine->codec); + + return 0; +} + +static const struct of_device_id tegra_wm9712_of_match[] = { + { .compatible = "nvidia,tegra-audio-wm9712", }, + {}, +}; + +static struct platform_driver tegra_wm9712_driver = { + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + .pm = &snd_soc_pm_ops, + .of_match_table = tegra_wm9712_of_match, + }, + .probe = tegra_wm9712_driver_probe, + .remove = tegra_wm9712_driver_remove, +}; +module_platform_driver(tegra_wm9712_driver); + +MODULE_AUTHOR("Lucas Stach"); +MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRV_NAME); +MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match); |