--- /dev/null
+/*
+ * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (C) 2010-2012 - 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 <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 "../codecs/wm8903.h"
+
+#include "tegra_asoc_utils.h"
+
+#define DRV_NAME "tegra-snd-wm8903"
+
+struct tegra_wm8903 {
+ int gpio_spkr_en;
+ int gpio_hp_det;
+ int gpio_hp_mute;
+ int gpio_int_mic_en;
+ int gpio_ext_mic_en;
+ struct tegra_asoc_utils_data util_data;
+};
+
+static int tegra_wm8903_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_card *card = rtd->card;
+ struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
+ int srate, mclk;
+ 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(&machine->util_data, srate, mclk);
+ if (err < 0) {
+ dev_err(card->dev, "Can't configure clocks\n");
+ return err;
+ }
+
+ 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 tegra_wm8903_ops = {
+ .hw_params = tegra_wm8903_hw_params,
+};
+
+static struct snd_soc_jack tegra_wm8903_hp_jack;
+
+static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
+ {
+ .pin = "Headphone Jack",
+ .mask = SND_JACK_HEADPHONE,
+ },
+};
+
+static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
+ .name = "headphone detect",
+ .report = SND_JACK_HEADPHONE,
+ .debounce_time = 150,
+ .invert = 1,
+};
+
+static struct snd_soc_jack tegra_wm8903_mic_jack;
+
+static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
+ {
+ .pin = "Mic Jack",
+ .mask = SND_JACK_MICROPHONE,
+ },
+};
+
+static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *k, int event)
+{
+ struct snd_soc_dapm_context *dapm = w->dapm;
+ struct snd_soc_card *card = dapm->card;
+ struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
+
+ if (!gpio_is_valid(machine->gpio_spkr_en))
+ return 0;
+
+ gpio_set_value_cansleep(machine->gpio_spkr_en,
+ SND_SOC_DAPM_EVENT_ON(event));
+
+ return 0;
+}
+
+static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *k, int event)
+{
+ struct snd_soc_dapm_context *dapm = w->dapm;
+ struct snd_soc_card *card = dapm->card;
+ struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
+
+ if (!gpio_is_valid(machine->gpio_hp_mute))
+ return 0;
+
+ gpio_set_value_cansleep(machine->gpio_hp_mute,
+ !SND_SOC_DAPM_EVENT_ON(event));
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
+ SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
+ SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
+ SND_SOC_DAPM_MIC("Mic Jack", NULL),
+};
+
+static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
+ SOC_DAPM_PIN_SWITCH("Int Spk"),
+};
+
+static int tegra_wm8903_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_card *card = rtd->card;
+ struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
+
+ if (gpio_is_valid(machine->gpio_hp_det)) {
+ tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
+ snd_soc_card_jack_new(rtd->card, "Headphone Jack",
+ SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
+ tegra_wm8903_hp_jack_pins,
+ ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
+ snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
+ 1,
+ &tegra_wm8903_hp_jack_gpio);
+ }
+
+ snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
+ &tegra_wm8903_mic_jack,
+ tegra_wm8903_mic_jack_pins,
+ ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
+ wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
+ 0);
+
+ snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
+
+ return 0;
+}
+
+static int tegra_wm8903_remove(struct snd_soc_card *card)
+{
+ struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
+
+ if (gpio_is_valid(machine->gpio_hp_det)) {
+ snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
+ &tegra_wm8903_hp_jack_gpio);
+ }
+
+ wm8903_mic_detect(codec, NULL, 0, 0);
+
+ return 0;
+}
+
+static struct snd_soc_dai_link tegra_wm8903_dai = {
+ .name = "WM8903",
+ .stream_name = "WM8903 PCM",
+ .codec_dai_name = "wm8903-hifi",
+ .init = tegra_wm8903_init,
+ .ops = &tegra_wm8903_ops,
+ .dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS,
+};
+
+static struct snd_soc_card snd_soc_tegra_wm8903 = {
+ .name = "tegra-wm8903",
+ .owner = THIS_MODULE,
+ .dai_link = &tegra_wm8903_dai,
+ .num_links = 1,
+ .remove = tegra_wm8903_remove,
+ .controls = tegra_wm8903_controls,
+ .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
+ .dapm_widgets = tegra_wm8903_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
+ .fully_routed = true,
+};
+
+static int tegra_wm8903_driver_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct snd_soc_card *card = &snd_soc_tegra_wm8903;
+ struct tegra_wm8903 *machine;
+ int ret;
+
+ machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
+ GFP_KERNEL);
+ if (!machine) {
+ dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
+ return -ENOMEM;
+ }
+
+ card->dev = &pdev->dev;
+ platform_set_drvdata(pdev, card);
+ snd_soc_card_set_drvdata(card, machine);
+
+ machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
+ 0);
+ if (machine->gpio_spkr_en == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (gpio_is_valid(machine->gpio_spkr_en)) {
+ ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
+ GPIOF_OUT_INIT_LOW, "spkr_en");
+ if (ret) {
+ dev_err(card->dev, "cannot get spkr_en gpio\n");
+ return ret;
+ }
+ }
+
+ machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
+ 0);
+ if (machine->gpio_hp_mute == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (gpio_is_valid(machine->gpio_hp_mute)) {
+ ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
+ GPIOF_OUT_INIT_HIGH, "hp_mute");
+ if (ret) {
+ dev_err(card->dev, "cannot get hp_mute gpio\n");
+ return ret;
+ }
+ }
+
+ machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
+ if (machine->gpio_hp_det == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ machine->gpio_int_mic_en = of_get_named_gpio(np,
+ "nvidia,int-mic-en-gpios", 0);
+ if (machine->gpio_int_mic_en == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (gpio_is_valid(machine->gpio_int_mic_en)) {
+ /* Disable int mic; enable signal is active-high */
+ ret = devm_gpio_request_one(&pdev->dev,
+ machine->gpio_int_mic_en,
+ GPIOF_OUT_INIT_LOW, "int_mic_en");
+ if (ret) {
+ dev_err(card->dev, "cannot get int_mic_en gpio\n");
+ return ret;
+ }
+ }
+
+ machine->gpio_ext_mic_en = of_get_named_gpio(np,
+ "nvidia,ext-mic-en-gpios", 0);
+ if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (gpio_is_valid(machine->gpio_ext_mic_en)) {
+ /* Enable ext mic; enable signal is active-low */
+ ret = devm_gpio_request_one(&pdev->dev,
+ machine->gpio_ext_mic_en,
+ GPIOF_OUT_INIT_LOW, "ext_mic_en");
+ if (ret) {
+ dev_err(card->dev, "cannot get ext_mic_en gpio\n");
+ return ret;
+ }
+ }
+
+ ret = snd_soc_of_parse_card_name(card, "nvidia,model");
+ if (ret)
+ goto err;
+
+ ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
+ if (ret)
+ goto err;
+
+ tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
+ "nvidia,audio-codec", 0);
+ if (!tegra_wm8903_dai.codec_of_node) {
+ dev_err(&pdev->dev,
+ "Property 'nvidia,audio-codec' missing or invalid\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
+ "nvidia,i2s-controller", 0);
+ if (!tegra_wm8903_dai.cpu_of_node) {
+ dev_err(&pdev->dev,
+ "Property 'nvidia,i2s-controller' missing or invalid\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
+
+ ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
+ if (ret)
+ goto err;
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+ ret);
+ goto err_fini_utils;
+ }
+
+ return 0;
+
+err_fini_utils:
+ tegra_asoc_utils_fini(&machine->util_data);
+err:
+ return ret;
+}
+
+static int tegra_wm8903_driver_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+ struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
+
+ snd_soc_unregister_card(card);
+
+ tegra_asoc_utils_fini(&machine->util_data);
+
+ return 0;
+}
+
+static const struct of_device_id tegra_wm8903_of_match[] = {
+ { .compatible = "nvidia,tegra-audio-wm8903", },
+ {},
+};
+
+static struct platform_driver tegra_wm8903_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = tegra_wm8903_of_match,
+ },
+ .probe = tegra_wm8903_driver_probe,
+ .remove = tegra_wm8903_driver_remove,
+};
+module_platform_driver(tegra_wm8903_driver);
+
+MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
+MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
Code Review / kvmfornfv.git / blobdiff