tegra_wm9712.rar

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  • 2015-03-24 19:13
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tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
tegra_wm9712.rar
  • tegra_wm9712.c
    4.6KB
内容介绍
/* * 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> #include "tegra_asoc_utils.h" #define DRV_NAME "tegra-snd-wm9712" struct tegra_wm9712 { struct platform_device *codec; struct tegra_asoc_utils_data util_data; }; 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; return snd_soc_dapm_force_enable_pin(dapm, "Mic Bias"); } static struct snd_soc_dai_link tegra_wm9712_dai = { .name = "AC97 HiFi", .stream_name = "AC97 HiFi", .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; 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 = tegra_asoc_utils_init(&machine->util_data, &pdev->dev); if (ret) goto codec_unregister; ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data); if (ret) goto asoc_utils_fini; ret = snd_soc_register_card(card); if (ret) { dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); goto asoc_utils_fini; } return 0; asoc_utils_fini: tegra_asoc_utils_fini(&machine->util_data); 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); tegra_asoc_utils_fini(&machine->util_data); 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, .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);
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