--- /dev/null
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/mfd/wm8994/registers.h>
+#include <linux/mfd/syscon.h>
+#include "../fsl/fsl_sai.h"
+#include "../codecs/wm8994.h"
+
+#define DAI_NAME_SIZE 32
+
+struct imx_wm8958_data {
+ struct snd_soc_dai_link dai;
+ struct snd_soc_card card;
+ char codec_dai_name[DAI_NAME_SIZE];
+ char platform_name[DAI_NAME_SIZE];
+ struct clk *mclk;
+ unsigned int clk_frequency;
+ bool is_codec_master;
+ int sr_stream[2];
+ struct regmap *gpr;
+};
+
+struct imx_priv {
+ int hp_gpio;
+ int hp_active_low;
+ struct snd_soc_codec *codec;
+ struct platform_device *pdev;
+ struct snd_kcontrol *headphone_kctl;
+ struct snd_card *snd_card;
+};
+
+static struct imx_priv card_priv;
+
+static struct snd_soc_jack imx_hp_jack;
+
+static struct snd_soc_jack_pin imx_hp_jack_pins[] = {
+ {
+ .pin = "Headphone Jack",
+ .mask = SND_JACK_HEADPHONE,
+ },
+};
+
+static struct snd_soc_jack_gpio imx_hp_jack_gpio = {
+ .name = "headphone detect",
+ .report = SND_JACK_HEADPHONE,
+ .debounce_time = 250,
+ .invert = 1,
+};
+
+static int hpjack_status_check(void *data)
+{
+ struct imx_priv *priv = &card_priv;
+ struct platform_device *pdev = priv->pdev;
+ char *envp[3], *buf;
+ int hp_status, ret;
+
+ if (!gpio_is_valid(priv->hp_gpio))
+ return 0;
+
+ hp_status = gpio_get_value(priv->hp_gpio);
+ buf = kmalloc(32, GFP_ATOMIC);
+ if (!buf) {
+ dev_err(&pdev->dev, "%s kmalloc failed\n", __func__);
+ return -ENOMEM;
+ }
+
+ if (hp_status != priv->hp_active_low) {
+ snprintf(buf, 32, "STATE=%d", 2);
+ snd_soc_dapm_disable_pin(snd_soc_codec_get_dapm(priv->codec), "Ext Spk");
+ ret = imx_hp_jack_gpio.report;
+ snd_kctl_jack_report(priv->snd_card, priv->headphone_kctl, 1);
+ } else {
+ snprintf(buf, 32, "STATE=%d", 0);
+ snd_soc_dapm_enable_pin(snd_soc_codec_get_dapm(priv->codec), "Ext Spk");
+ ret = 0;
+ snd_kctl_jack_report(priv->snd_card, priv->headphone_kctl, 0);
+ }
+
+ envp[0] = "NAME=headphone";
+ envp[1] = buf;
+ envp[2] = NULL;
+ kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, envp);
+ kfree(buf);
+
+ return ret;
+}
+
+static const struct snd_soc_dapm_widget imx_wm8958_dapm_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static const struct snd_soc_dapm_route imx_wm8958_dapm_route[] = {
+ {"Headphone Jack", NULL, "HPOUT1L"},
+ {"Headphone Jack", NULL, "HPOUT1R"},
+ {"Ext Spk", NULL, "SPKOUTLP"},
+ {"Ext Spk", NULL, "SPKOUTLN"},
+ {"Ext Spk", NULL, "SPKOUTRP"},
+ {"Ext Spk", NULL, "SPKOUTRN"},
+ {"IN1LN", NULL, "MICBIAS2"},
+};
+
+static int imx_hifi_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 = codec_dai->codec;
+ struct snd_soc_card *card = rtd->card;
+ struct device *dev = card->dev;
+ struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ unsigned int sample_rate = params_rate(params);
+ unsigned int pll_out;
+ int ret;
+
+ if (tx && params_width(params) == 24) {
+ if (sample_rate == 88200 || sample_rate == 96000 ||
+ sample_rate == 48000 || sample_rate == 44100) {
+ dev_err(dev, "Can't support sample rate %dHZ\n", sample_rate);
+ return -EINVAL;
+ }
+ } else if (!tx && params_width(params) == 24) {
+ if (sample_rate == 44100 || sample_rate == 48000) {
+ dev_err(dev, "Can't support sample rate %dHZ\n", sample_rate);
+ return -EINVAL;
+ }
+ }
+
+ ret = snd_soc_dai_set_fmt(codec_dai, data->dai.dai_fmt);
+ if (ret) {
+ dev_err(dev, "failed to set codec dai fmt: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_fmt(cpu_dai, data->dai.dai_fmt);
+ if (ret) {
+ dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+ return ret;
+ }
+
+ data->clk_frequency = clk_get_rate(data->mclk);
+
+ if (!data->is_codec_master) {
+ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
+ if (ret) {
+ dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_FLL_SRC_MCLK1,
+ data->clk_frequency, SND_SOC_CLOCK_IN);
+ if (ret) {
+ dev_err(dev, "failed to set codec sysclk: %d\n", ret);
+ return ret;
+ }
+ } else {
+ data->sr_stream[tx] = sample_rate;
+
+ if (params_width(params) == 24)
+ pll_out = data->sr_stream[tx] * 384;
+ else
+ pll_out = data->sr_stream[tx] * 256;
+
+ ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
+ WM8994_FLL_SRC_MCLK1,
+ data->clk_frequency,
+ pll_out);
+ if (ret) {
+ dev_err(dev, "failed to set codec pll: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_IN);
+ if (ret) {
+ dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
+ pll_out, SND_SOC_CLOCK_OUT);
+ if (ret) {
+ dev_err(dev, "failed to set codec sysclk: %d\n", ret);
+ return ret;
+ }
+ }
+
+ /*
+ * Set GPIO1 pin function to reserve, so that DAC1 and ADC1 using shared
+ * LRCLK from DACLRCK1.
+ */
+ snd_soc_update_bits(codec, WM8994_GPIO_1, 0x1f, 0x2);
+
+ /*
+ * Clear ADC_OSR128 bit to support slower SYSCLK, and support ADC sample
+ * rate 8K, 11.025K and 12K.
+ */
+ snd_soc_update_bits(codec, WM8994_OVERSAMPLING, 1<<1, 0);
+ return 0;
+}
+
+static int imx_hifi_hw_free(struct snd_pcm_substream *substream)
+{
+ 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 imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+
+ if (data->is_codec_master &&
+ data->sr_stream[!tx] == 0 && data->sr_stream[tx]) {
+ /*
+ * We should connect AIF1CLK source to FLL after enable FLL, and
+ * disconnet AIF1CLK source to FLL before disable FLL, otherwise
+ * FLL worked abnormal.
+ */
+ snd_soc_dai_set_sysclk(codec_dai, WM8994_FLL_SRC_MCLK1,
+ data->clk_frequency, SND_SOC_CLOCK_OUT);
+
+ /* Disable FLL1 after all stream finished. */
+ snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 0, 0, 0);
+ }
+
+ data->sr_stream[tx] = 0;
+
+ return 0;
+}
+
+static u32 imx_wm8958_adc_rates[] = {
+ 8000, 11025, 12000, 16000, 22050,
+ 24000, 32000, 44100, 48000
+};
+
+static u32 imx_wm8958_dac_rates[] = {
+ 8000, 11025, 12000, 16000, 22050,
+ 24000, 32000, 44100, 48000, 88200, 96000
+};
+
+static struct snd_pcm_hw_constraint_list imx_wm8958_adc_rate_constraints = {
+ .count = ARRAY_SIZE(imx_wm8958_adc_rates),
+ .list = imx_wm8958_adc_rates,
+};
+
+static struct snd_pcm_hw_constraint_list imx_wm8958_dac_rate_constraints = {
+ .count = ARRAY_SIZE(imx_wm8958_dac_rates),
+ .list = imx_wm8958_dac_rates,
+};
+
+static int imx_hifi_startup(struct snd_pcm_substream *substream)
+{
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ int ret = 0;
+
+ if (!tx)
+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE, &imx_wm8958_adc_rate_constraints);
+ else
+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE, &imx_wm8958_dac_rate_constraints);
+ return ret;
+}
+
+static struct snd_soc_ops imx_hifi_ops = {
+ .hw_params = imx_hifi_hw_params,
+ .hw_free = imx_hifi_hw_free,
+ .startup = imx_hifi_startup,
+};
+
+static int imx_wm8958_gpio_init(struct snd_soc_card *card)
+{
+ struct snd_soc_pcm_runtime *rtd = list_first_entry(
+ &card->rtd_list, struct snd_soc_pcm_runtime, list);
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct imx_priv *priv = &card_priv;
+ int ret;
+ priv->codec = codec;
+
+ if (gpio_is_valid(priv->hp_gpio)) {
+ imx_hp_jack_gpio.gpio = priv->hp_gpio;
+ imx_hp_jack_gpio.jack_status_check = hpjack_status_check;
+
+ ret = snd_soc_card_jack_new(card, "Headphone Jack",
+ SND_JACK_HEADPHONE, &imx_hp_jack,
+ imx_hp_jack_pins, ARRAY_SIZE(imx_hp_jack_pins));
+ if (ret)
+ return ret;
+
+ ret = snd_soc_jack_add_gpios(&imx_hp_jack, 1,
+ &imx_hp_jack_gpio);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static ssize_t show_headphone(struct device_driver *dev, char *buf)
+{
+ struct imx_priv *priv = &card_priv;
+ int hp_status;
+
+ if (!gpio_is_valid(priv->hp_gpio)) {
+ strcpy(buf, "no detect gpio connected\n");
+ return strlen(buf);
+ }
+
+ /* Check if headphone is plugged in */
+ hp_status = gpio_get_value(priv->hp_gpio);
+
+ if (hp_status != priv->hp_active_low)
+ strcpy(buf, "headphone\n");
+ else
+ strcpy(buf, "speaker\n");
+
+ return strlen(buf);
+}
+
+static DRIVER_ATTR(headphone, S_IRUGO | S_IWUSR, show_headphone, NULL);
+
+static int imx_wm8958_set_bias_level(struct snd_soc_card *card,
+ struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ struct snd_soc_pcm_runtime *rtd = list_first_entry(
+ &card->rtd_list, struct snd_soc_pcm_runtime, list);
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ if (dapm->dev != codec_dai->dev)
+ return 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_STANDBY:
+ if (card->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ if (!IS_ERR(data->mclk)) {
+ ret = clk_prepare_enable(data->mclk);
+ if (ret) {
+ dev_err(card->dev,
+ "Failed to enable MCLK: %d\n",
+ ret);
+ return ret;
+ }
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int imx_wm8958_set_bias_level_post(struct snd_soc_card *card,
+ struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ struct snd_soc_pcm_runtime *rtd = list_first_entry(
+ &card->rtd_list, struct snd_soc_pcm_runtime, list);
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
+
+ if (dapm->dev != codec_dai->dev)
+ return 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_OFF:
+ if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
+ if (!IS_ERR(data->mclk))
+ clk_disable_unprepare(data->mclk);
+ break;
+ default:
+ break;
+ }
+
+ card->dapm.bias_level = level;
+
+ return 0;
+}
+
+static int imx_wm8958_probe(struct platform_device *pdev)
+{
+ struct device_node *cpu_np, *codec_np, *gpr_np;
+ struct device_node *np = pdev->dev.of_node;
+ struct platform_device *cpu_pdev;
+ struct imx_priv *priv = &card_priv;
+ struct i2c_client *codec_dev;
+ struct imx_wm8958_data *data;
+ int ret;
+
+ priv->pdev = pdev;
+
+ cpu_np = of_parse_phandle(np, "cpu-dai", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ codec_np = of_parse_phandle(np, "audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "phandle missing or invalid\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ cpu_pdev = of_find_device_by_node(cpu_np);
+ if (!cpu_pdev) {
+ dev_err(&pdev->dev, "failed to find SAI platform device\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ codec_dev = of_find_i2c_device_by_node(codec_np);
+ if (!codec_dev || !codec_dev->dev.driver) {
+ dev_err(&pdev->dev, "failed to find codec platform device\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ gpr_np = of_parse_phandle(pdev->dev.of_node, "gpr", 0);
+ if (gpr_np) {
+ data->gpr = syscon_node_to_regmap(gpr_np);
+ if (IS_ERR(data->gpr)) {
+ ret = PTR_ERR(data->gpr);
+ dev_err(&pdev->dev, "failed to get gpr regmap\n");
+ goto fail;
+ }
+ if (data->gpr)
+ regmap_update_bits(data->gpr, 4, 1<<20, 1<<20);
+ }
+
+ if (of_property_read_bool(np, "codec-master")) {
+ data->dai.dai_fmt = SND_SOC_DAIFMT_CBM_CFM;
+ data->is_codec_master = true;
+ } else
+ data->dai.dai_fmt = SND_SOC_DAIFMT_CBS_CFS;
+
+ data->mclk = devm_clk_get(&codec_dev->dev, "mclk1");
+ if (IS_ERR(data->mclk)) {
+ ret = PTR_ERR(data->mclk);
+ dev_err(&pdev->dev, "failed to get codec clk: %d\n", ret);
+ goto fail;
+ }
+
+ priv->hp_gpio = of_get_named_gpio_flags(np, "hp-det-gpios", 0,
+ (enum of_gpio_flags *)&priv->hp_active_low);
+
+ data->dai.name = "HiFi";
+ data->dai.stream_name = "HiFi";
+ data->dai.codec_dai_name = "wm8994-aif1";
+ data->dai.codec_name = "wm8994-codec";
+ data->dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
+ data->dai.platform_of_node = cpu_np;
+ data->dai.ops = &imx_hifi_ops;
+ data->dai.dai_fmt |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
+ data->card.set_bias_level = imx_wm8958_set_bias_level;
+ data->card.set_bias_level_post = imx_wm8958_set_bias_level_post;
+
+ data->card.dev = &pdev->dev;
+ ret = snd_soc_of_parse_card_name(&data->card, "model");
+ if (ret)
+ goto fail;
+
+ data->card.num_links = 1;
+ data->card.dai_link = &data->dai;
+ data->card.dapm_widgets = imx_wm8958_dapm_widgets;
+ data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8958_dapm_widgets);
+ data->card.dapm_routes = imx_wm8958_dapm_route;
+ data->card.num_dapm_routes = ARRAY_SIZE(imx_wm8958_dapm_route);
+ platform_set_drvdata(pdev, &data->card);
+ snd_soc_card_set_drvdata(&data->card, data);
+
+ ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
+ if (ret) {
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+ goto fail;
+ }
+
+ priv->snd_card = data->card.snd_card;
+
+ priv->headphone_kctl = snd_kctl_jack_new("Headphone", NULL);
+ ret = snd_ctl_add(data->card.snd_card, priv->headphone_kctl);
+ if (ret)
+ goto fail;
+
+ ret = imx_wm8958_gpio_init(&data->card);
+
+ if (gpio_is_valid(priv->hp_gpio)) {
+ ret = driver_create_file(pdev->dev.driver,
+ &driver_attr_headphone);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "create hp attr failed (%d)\n", ret);
+ goto fail;
+ }
+ }
+
+fail:
+ if (cpu_np)
+ of_node_put(cpu_np);
+ if (codec_np)
+ of_node_put(codec_np);
+
+ return ret;
+}
+
+static int imx_wm8958_remove(struct platform_device *pdev)
+{
+ driver_remove_file(pdev->dev.driver, &driver_attr_headphone);
+ return 0;
+}
+
+static const struct of_device_id imx_wm8958_dt_ids[] = {
+ { .compatible = "fsl,imx-audio-wm8958", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_wm8958_dt_ids);
+
+static struct platform_driver imx_wm8958_driver = {
+ .driver = {
+ .name = "imx-wm8958",
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = imx_wm8958_dt_ids,
+ },
+ .probe = imx_wm8958_probe,
+ .remove = imx_wm8958_remove,
+};
+module_platform_driver(imx_wm8958_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX WM8958 ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-wm8958");
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