Enable MAX98357 audio driver.
Bug: 143917131
Test: aplay and gst-launch-1.0 to play wave files
Change-Id: I087cb6772ca1b0e325570d5366ac297a3ef1e746
diff --git a/arch/arm64/boot/dts/freescale/fsl-imx8mm-columbia.dts b/arch/arm64/boot/dts/freescale/fsl-imx8mm-columbia.dts
index 0a5c66f..caf1434 100755
--- a/arch/arm64/boot/dts/freescale/fsl-imx8mm-columbia.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-imx8mm-columbia.dts
@@ -108,6 +108,18 @@
};
};
+ max98357a: max98357a {
+ compatible = "maxim,max98357a";
+ sdmode-gpios = <&gpio4 29 GPIO_ACTIVE_HIGH>;
+ };
+
+ sound {
+ compatible = "fsl,imx-audio-max98357a";
+ model = "max98357a-audio";
+ audio-cpu = <&sai3>;
+ audio-codec = <&max98357a>;
+ };
+
};
&clk {
@@ -264,7 +276,7 @@
MX8MM_IOMUXC_SAI3_TXC_SAI3_TX_BCLK 0xd6
MX8MM_IOMUXC_SAI3_MCLK_SAI3_MCLK 0xd6
MX8MM_IOMUXC_SAI3_TXD_SAI3_TX_DATA0 0xd6
- MX8MM_IOMUXC_I2C4_SDA_GPIO5_IO21 0xd6
+ MX8MM_IOMUXC_SAI3_RXC_GPIO4_IO29 0xd6
>;
};
diff --git a/sound/soc/google/Kconfig b/sound/soc/google/Kconfig
index b9c9851..c93eb7a 100644
--- a/sound/soc/google/Kconfig
+++ b/sound/soc/google/Kconfig
@@ -6,4 +6,10 @@
help
Say Y if you want to add support for Google Edge TPU audio
+config SND_SOC_IMX_MAX98357A
+ tristate "MAX98375a codec driver"
+ select SND_SOC_MAX98357A
+ help
+ Say Y if you want to add support for MAX98375A amplifier
+
endmenu
diff --git a/sound/soc/google/Makefile b/sound/soc/google/Makefile
index c9f420f..9201faa 100644
--- a/sound/soc/google/Makefile
+++ b/sound/soc/google/Makefile
@@ -1,2 +1,3 @@
snd-edgetpu-card := snd-edgetpu-card.o
obj-$(CONFIG_SND_GOOGLE_EDGETPU_CARD) += snd-edgetpu-card.o
+obj-$(CONFIG_SND_SOC_IMX_MAX98357A) += imx-max98357a.o
diff --git a/sound/soc/google/imx-max98357a.c b/sound/soc/google/imx-max98357a.c
new file mode 100644
index 0000000..0d12902
--- /dev/null
+++ b/sound/soc/google/imx-max98357a.c
@@ -0,0 +1,231 @@
+/*
+ * imx8mm ASOC Driver for the Maxim 98357a chip
+ *
+ * Author: Cindy Liu <hcindyl@google.com>
+ * Copyright 2019
+ *
+ * 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/of_platform.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/syscon.h>
+
+struct imx_priv {
+ struct platform_device *pdev;
+ struct snd_soc_card card;
+ struct clk *codec_clk;
+ unsigned int clk_frequency;
+};
+
+static const struct snd_soc_dapm_widget imx_max98357a_dapm_widgets[] = {
+ SND_SOC_DAPM_SPK("Speakers", NULL),
+};
+
+static const struct snd_soc_dapm_route audio_routes[] = {
+ {"Speakers", NULL, "Speaker"},
+};
+
+static const struct snd_kcontrol_new card_controls[] = {
+ SOC_DAPM_PIN_SWITCH("Speaker"),
+};
+
+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 *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_card *card = rtd->card;
+ struct device *dev = card->dev;
+ unsigned int fmt;
+ int ret = 0;
+
+ /* max98357a supports these sample rates */
+ switch (params_rate(params)) {
+ case 8000:
+ case 16000:
+ case 48000:
+ case 96000:
+ break;
+ default:
+ dev_err(rtd->card->dev, "%s() doesn't support this sample rate: %d\n",
+ __func__, params_rate(params));
+ return -EINVAL;
+ }
+
+ /* Set max98375a as slave */
+ fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS;
+
+ ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
+ if (ret) {
+ dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2,
+ params_physical_width(params));
+ if (ret) {
+ dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
+ return ret;
+ }
+ return ret;
+}
+
+static struct snd_soc_ops imx_hifi_ops = {
+ .hw_params = imx_hifi_hw_params,
+};
+
+static struct snd_soc_dai_link imx_max98357a_dai[] = {
+ {
+ .name = "MAX98357A",
+ .stream_name = "MAX98357A",
+ .codec_dai_name = "HiFi",
+ .ops = &imx_hifi_ops,
+ },
+};
+
+static int imx_max98357a_late_probe(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 imx_priv *priv = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ priv->clk_frequency = clk_get_rate(priv->codec_clk);
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, 0, priv->clk_frequency,
+ SND_SOC_CLOCK_IN);
+ dev_info(rtd->card->dev, "%s() sets sysclk to %u\n", __func__,
+ priv->clk_frequency);
+
+ return 0;
+}
+
+static int imx_max98357a_probe(struct platform_device *pdev)
+{
+ struct device_node *cpu_np, *codec_np = NULL;
+ struct platform_device *cpu_pdev;
+ struct imx_priv *priv;
+ struct platform_device *codec_pdev = NULL;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->pdev = pdev;
+
+ cpu_np = of_parse_phandle(pdev->dev.of_node, "audio-cpu", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ codec_np = of_parse_phandle(pdev->dev.of_node, "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_pdev = of_find_device_by_node(codec_np);
+ if (!codec_pdev || !codec_pdev->dev.driver) {
+ dev_err(&pdev->dev, "failed to find codec platform device\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ priv->codec_clk = devm_clk_get(&cpu_pdev->dev, "mclk1");
+ if (IS_ERR(priv->codec_clk)) {
+ ret = PTR_ERR(priv->codec_clk);
+ dev_err(&pdev->dev, "failed to get codec clk: %d\n", ret);
+ goto fail;
+ }
+
+ priv->card.dai_link = imx_max98357a_dai;
+
+ imx_max98357a_dai[0].codec_of_node = codec_np;
+ imx_max98357a_dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
+ imx_max98357a_dai[0].platform_of_node = cpu_np;
+ imx_max98357a_dai[0].playback_only = 1;
+
+ priv->card.late_probe = imx_max98357a_late_probe;
+ priv->card.num_links = 1;
+ priv->card.dev = &pdev->dev;
+ priv->card.owner = THIS_MODULE;
+ priv->card.dapm_widgets = imx_max98357a_dapm_widgets;
+ priv->card.num_dapm_widgets = ARRAY_SIZE(imx_max98357a_dapm_widgets);
+ priv->card.controls = card_controls;
+ priv->card.num_controls = ARRAY_SIZE(card_controls);
+ priv->card.dapm_routes = audio_routes,
+ priv->card.num_dapm_routes = ARRAY_SIZE(audio_routes);
+
+ ret = snd_soc_of_parse_card_name(&priv->card, "model");
+ if (ret)
+ goto fail;
+
+ snd_soc_card_set_drvdata(&priv->card, priv);
+
+ ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
+ if (ret) {
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+ goto fail;
+ }
+ dev_info(&pdev->dev, "snd_soc_register_card successed.\n");
+
+ ret = 0;
+fail:
+ if (cpu_np)
+ of_node_put(cpu_np);
+ if (codec_np)
+ of_node_put(codec_np);
+
+ return ret;
+}
+
+static const struct of_device_id imx_max98357a_dt_ids[] = {
+ { .compatible = "fsl,imx-audio-max98357a", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_max98357a_dt_ids);
+
+static struct platform_driver imx_max98357a_driver = {
+ .driver = {
+ .name = "imx-max98357a",
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = imx_max98357a_dt_ids,
+ },
+ .probe = imx_max98357a_probe,
+};
+module_platform_driver(imx_max98357a_driver);
+
+MODULE_AUTHOR("Cindy Liu <hcindyl@google.com>");
+MODULE_DESCRIPTION("i.MX MAX98357a ASoC machine driver");
+MODULE_LICENSE("GPL v2");
