CHROMIUM: ASoC: Tegra: Seaboard: Add machine support

sound/soc/tegra/seaboard.c

+/*
+ * seaboard.c - Seaboard machine ASoC driver
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (C) 2010-2011 - NVIDIA, Inc.
+ *
+ * Based on code copyright/by:
+ *
+ * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory
+ *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <asm/mach-types.h>
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+
+#include <mach/seaboard_audio.h>
+
+#include <sound/core.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "../codecs/wm8903.h"
+
+#include "tegra_das.h"
+#include "tegra_i2s.h"
+#include "tegra_pcm.h"
+#include "tegra_asoc_utils.h"
+
+#define DRV_NAME "tegra-snd-seaboard"
+
+#define GPIO_SPKR_EN    BIT(0)
+
+struct tegra_seaboard {
+        struct tegra_asoc_utils_data util_data;
+        struct seaboard_audio_platform_data *pdata;
+        int gpio_requested;
+};
+
+static int seaboard_asoc_hw_params(struct snd_pcm_substream *substream,
+                                        struct snd_pcm_hw_params *params)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct snd_soc_dai *codec_dai = rtd->codec_dai;
+        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+        struct snd_soc_codec *codec = rtd->codec;
+        struct snd_soc_card *card = codec->card;
+        struct tegra_seaboard *seaboard = snd_soc_card_get_drvdata(card);
+        int srate, mclk, mclk_change;
+        int err;
+
+        srate = params_rate(params);
+        switch (srate) {
+        case 64000:
+        case 88200:
+        case 96000:
+                mclk = 128 * srate;
+                break;
+        default:
+                mclk = 256 * srate;
+                break;
+        }
+        /* FIXME: Codec only requires >= 3MHz if OSR==0 */
+        while (mclk < 6000000)
+                mclk *= 2;
+
+        err = tegra_asoc_utils_set_rate(&seaboard->util_data, srate, mclk,
+                                        &mclk_change);
+        if (err < 0) {
+                dev_err(card->dev, "Can't configure clocks\n");
+                return err;
+        }
+
+        err = snd_soc_dai_set_fmt(codec_dai,
+                                        SND_SOC_DAIFMT_I2S |
+                                        SND_SOC_DAIFMT_NB_NF |
+                                        SND_SOC_DAIFMT_CBS_CFS);
+        if (err < 0) {
+                dev_err(card->dev, "codec_dai fmt not set\n");
+                return err;
+        }
+
+        err = snd_soc_dai_set_fmt(cpu_dai,
+                                        SND_SOC_DAIFMT_I2S |
+                                        SND_SOC_DAIFMT_NB_NF |
+                                        SND_SOC_DAIFMT_CBS_CFS);
+        if (err < 0) {
+                dev_err(card->dev, "cpu_dai fmt not set\n");
+                return err;
+        }
+
+        if (mclk_change) {
+                err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
+                                             SND_SOC_CLOCK_IN);
+                if (err < 0) {
+                        dev_err(card->dev, "codec_dai clock not set\n");
+                        return err;
+                }
+        }
+
+        return 0;
+}
+
+static struct snd_soc_ops seaboard_asoc_ops = {
+        .hw_params = seaboard_asoc_hw_params,
+};
+
+static struct snd_soc_jack seaboard_hp_jack;
+
+static struct snd_soc_jack_pin seaboard_hp_jack_pins[] = {
+        {
+                .pin = "Headphone Jack",
+                .mask = SND_JACK_HEADPHONE,
+        },
+};
+
+static struct snd_soc_jack_gpio seaboard_hp_jack_gpios[] = {
+        {
+                .name = "headphone detect",
+                .report = SND_JACK_HEADPHONE,
+                .debounce_time = 150,
+                .invert = 1,
+        }
+};
+
+static struct snd_soc_jack seaboard_mic_jack;
+
+static struct snd_soc_jack_pin seaboard_mic_jack_pins[] = {
+        {
+                .pin = "Mic Jack",
+                .mask = SND_JACK_MICROPHONE,
+        },
+};
+
+static int seaboard_event_int_spk(struct snd_soc_dapm_widget *w,
+                                        struct snd_kcontrol *k, int event)
+{
+        struct snd_soc_codec *codec = w->codec;
+        struct snd_soc_card *card = codec->card;
+        struct tegra_seaboard *seaboard = snd_soc_card_get_drvdata(card);
+        struct seaboard_audio_platform_data *pdata = seaboard->pdata;
+
+        gpio_set_value_cansleep(pdata->gpio_spkr_en,
+                                SND_SOC_DAPM_EVENT_ON(event));
+
+        return 0;
+}
+
+static const struct snd_soc_dapm_widget seaboard_dapm_widgets[] = {
+        SND_SOC_DAPM_SPK("Int Spk", seaboard_event_int_spk),
+        SND_SOC_DAPM_HP("Headphone Jack", NULL),
+        SND_SOC_DAPM_MIC("Mic Jack", NULL),
+};
+
+static const struct snd_soc_dapm_route seaboard_audio_map[] = {
+        {"Headphone Jack", NULL, "HPOUTR"},
+        {"Headphone Jack", NULL, "HPOUTL"},
+        {"Int Spk", NULL, "ROP"},
+        {"Int Spk", NULL, "RON"},
+        {"Int Spk", NULL, "LOP"},
+        {"Int Spk", NULL, "LON"},
+        {"Mic Bias", NULL, "Mic Jack"},
+        {"IN1R", NULL, "Mic Bias"},
+};
+
+static const struct snd_kcontrol_new seaboard_controls[] = {
+        SOC_DAPM_PIN_SWITCH("Int Spk"),
+};
+
+static int seaboard_asoc_init(struct snd_soc_pcm_runtime *rtd)
+{
+        struct snd_soc_codec *codec = rtd->codec;
+        struct snd_soc_dapm_context *dapm = &codec->dapm;
+        struct snd_soc_card *card = codec->card;
+        struct tegra_seaboard *seaboard = snd_soc_card_get_drvdata(card);
+        struct seaboard_audio_platform_data *pdata = seaboard->pdata;
+        int ret;
+
+        ret = gpio_request(pdata->gpio_spkr_en, "spkr_en");
+        if (ret) {
+                dev_err(card->dev, "cannot get spkr_en gpio\n");
+                return ret;
+        }
+        seaboard->gpio_requested |= GPIO_SPKR_EN;
+
+        gpio_direction_output(pdata->gpio_spkr_en, 0);
+
+        ret = snd_soc_add_controls(codec, seaboard_controls,
+                                   ARRAY_SIZE(seaboard_controls));
+        if (ret < 0)
+                return ret;
+
+        snd_soc_dapm_new_controls(dapm, seaboard_dapm_widgets,
+                                        ARRAY_SIZE(seaboard_dapm_widgets));
+
+        snd_soc_dapm_add_routes(dapm, seaboard_audio_map,
+                                ARRAY_SIZE(seaboard_audio_map));
+
+        seaboard_hp_jack_gpios[0].gpio = pdata->gpio_hp_det;
+        snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
+                         &seaboard_hp_jack);
+        snd_soc_jack_add_pins(&seaboard_hp_jack,
+                              ARRAY_SIZE(seaboard_hp_jack_pins),
+                              seaboard_hp_jack_pins);
+        snd_soc_jack_add_gpios(&seaboard_hp_jack,
+                               ARRAY_SIZE(seaboard_hp_jack_gpios),
+                               seaboard_hp_jack_gpios);
+
+        snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
+                         &seaboard_mic_jack);
+        snd_soc_jack_add_pins(&seaboard_mic_jack,
+                              ARRAY_SIZE(seaboard_mic_jack_pins),
+                              seaboard_mic_jack_pins);
+        wm8903_mic_detect(codec, &seaboard_mic_jack, SND_JACK_MICROPHONE, 0);
+
+        snd_soc_dapm_force_enable_pin(dapm, "Mic Bias");
+
+        snd_soc_dapm_nc_pin(dapm, "IN3L");
+        snd_soc_dapm_nc_pin(dapm, "IN3R");
+        snd_soc_dapm_nc_pin(dapm, "LINEOUTL");
+        snd_soc_dapm_nc_pin(dapm, "LINEOUTR");
+
+        snd_soc_dapm_sync(dapm);
+
+        return 0;
+}
+
+static struct snd_soc_dai_link seaboard_wm8903_dai = {
+        .name = "WM8903",
+        .stream_name = "WM8903 PCM",
+        .codec_name = "wm8903.0-001a",
+        .platform_name = "tegra-pcm-audio",
+        .cpu_dai_name = "tegra-i2s.0",
+        .codec_dai_name = "wm8903-hifi",
+        .init = seaboard_asoc_init,
+        .ops = &seaboard_asoc_ops,
+};
+
+static struct snd_soc_card snd_soc_seaboard = {
+        .name = "tegra-seaboard",
+        .dai_link = &seaboard_wm8903_dai,
+        .num_links = 1,
+};
+
+static __devinit int tegra_snd_seaboard_probe(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = &snd_soc_seaboard;
+        struct tegra_seaboard *seaboard;
+        struct seaboard_audio_platform_data *pdata;
+        int ret;
+
+        if (!machine_is_seaboard()) {
+                dev_err(&pdev->dev, "Not running on Tegra seaboard!\n");
+                return -ENODEV;
+        }
+
+        pdata = pdev->dev.platform_data;
+        if (!pdata) {
+                dev_err(&pdev->dev, "no platform data supplied\n");
+                return -EINVAL;
+        }
+
+        seaboard = kzalloc(sizeof(struct tegra_seaboard), GFP_KERNEL);
+        if (!seaboard) {
+                dev_err(&pdev->dev, "Can't allocate tegra_seaboard\n");
+                return -ENOMEM;
+        }
+
+        seaboard->pdata = pdata;
+
+        ret = tegra_asoc_utils_init(&seaboard->util_data, &pdev->dev);
+        if (ret)
+                goto err_free_seaboard;
+
+        card->dev = &pdev->dev;
+        platform_set_drvdata(pdev, card);
+        snd_soc_card_set_drvdata(card, seaboard);
+
+        ret = snd_soc_register_card(card);
+        if (ret) {
+                dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+                        ret);
+                goto err_clear_drvdata;
+        }
+
+        return 0;
+
+err_clear_drvdata:
+        snd_soc_card_set_drvdata(card, NULL);
+        platform_set_drvdata(pdev, NULL);
+        card->dev = NULL;
+        tegra_asoc_utils_fini(&seaboard->util_data);
+err_free_seaboard:
+        kfree(seaboard);
+        return ret;
+}
+
+static int __devexit tegra_snd_seaboard_remove(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = platform_get_drvdata(pdev);
+        struct tegra_seaboard *seaboard = snd_soc_card_get_drvdata(card);
+        struct seaboard_audio_platform_data *pdata = seaboard->pdata;
+
+        snd_soc_unregister_card(card);
+
+        snd_soc_card_set_drvdata(card, NULL);
+        platform_set_drvdata(pdev, NULL);
+        card->dev = NULL;
+
+        tegra_asoc_utils_fini(&seaboard->util_data);
+
+        if (seaboard->gpio_requested & GPIO_SPKR_EN)
+                gpio_free(pdata->gpio_spkr_en);
+
+        kfree(seaboard);
+
+        return 0;
+}
+
+static struct platform_driver tegra_snd_seaboard_driver = {
+        .driver = {
+                .name = DRV_NAME,
+                .owner = THIS_MODULE,
+        },
+        .probe = tegra_snd_seaboard_probe,
+        .remove = __devexit_p(tegra_snd_seaboard_remove),
+};
+
+static int __init snd_tegra_seaboard_init(void)
+{
+        return platform_driver_register(&tegra_snd_seaboard_driver);
+}
+module_init(snd_tegra_seaboard_init);
+
+static void __exit snd_tegra_seaboard_exit(void)
+{
+        platform_driver_unregister(&tegra_snd_seaboard_driver);
+}
+module_exit(snd_tegra_seaboard_exit);
+
+MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
+MODULE_DESCRIPTION("Seaboard machine ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);