ASoC: tegra: add tegra machine driver using wm9712 codec
This adds a very simple machine driver using the Wolfson wm9712 AC97
codec.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/tegra/tegra_wm9712.c b/sound/soc/tegra/tegra_wm9712.c
new file mode 100644
index 0000000..cdbd2f0
--- /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[] __devinitconst = {
+ { .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);