[alsa-devel] [PATCH] ASoC: fsl: add imx-wm8962 machine driver
Nicolin Chen
b42378 at freescale.com
Wed Jun 5 09:25:31 CEST 2013
This is the initial imx-wm8962 device-tree-only machine driver working with
fsl_ssi driver. More features can be added on top of it later.
Signed-off-by: Nicolin Chen <b42378 at freescale.com>
---
.../devicetree/bindings/sound/imx-audio-wm8962.txt | 61 +++
sound/soc/fsl/Kconfig | 12 +
sound/soc/fsl/Makefile | 2 +
sound/soc/fsl/imx-wm8962.c | 387 ++++++++++++++++++++
4 files changed, 462 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt
create mode 100644 sound/soc/fsl/imx-wm8962.c
diff --git a/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt b/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt
new file mode 100644
index 0000000..cb188a6
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt
@@ -0,0 +1,61 @@
+Freescale i.MX audio complex with WM8962 codec
+
+Required properties:
+- compatible : "fsl,imx-audio-wm8962"
+- model : The user-visible name of this sound complex
+- ssi-controller : The phandle of the i.MX SSI controller
+- audio-codec : The phandle of the WM8962 audio codec
+- audio-routing : A list of the connections between audio components.
+ Each entry is a pair of strings, the first being the connection's sink,
+ the second being the connection's source. Valid names could be power
+ supplies, WM8962 pins, and the jacks on the board:
+
+ Power supplies:
+ * Mic Bias
+
+ WM8962 pins:
+ * HPOUTL
+ * HPOUTR
+ * SPKOUTL
+ * SPKOUTR
+ * MICBIAS
+ * IN3R
+ * DMIC
+ * DMICDAT
+
+ Board connectors:
+ * Mic Jack
+ * Headphone Jack
+ * Ext Spk
+
+- mux-int-port : The internal port of the i.MX audio muxer (AUDMUX)
+- mux-ext-port : The external port of the i.MX audio muxer
+
+- hp-det-gpios : The gpio port of Headphone detection.
+- mic-det-gpios: The gpio port of Micphone detection.
+
+Note: The AUDMUX port numbering should start at 1, which is consistent with
+hardware manual.
+
+Example:
+
+sound {
+ compatible = "fsl,imx6q-sabresd-wm8962",
+ "fsl,imx-audio-wm8962";
+ model = "wm8962-audio";
+ ssi-controller = <&ssi2>;
+ audio-codec = <&codec>;
+ audio-routing =
+ "Headphone Jack", "HPOUTL",
+ "Headphone Jack", "HPOUTR",
+ "Ext Spk", "SPKOUTL",
+ "Ext Spk", "SPKOUTR",
+ "MICBIAS", "AMIC",
+ "IN3R", "MICBIAS",
+ "DMIC", "MICBIAS",
+ "DMICDAT", "DMIC";
+ mux-int-port = <2>;
+ mux-ext-port = <3>;
+ hp-det-gpios = <&gpio7 8 1>; /* active low */
+ mic-det-gpios = <&gpio1 9 1>; /* active low */
+};
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 7860cc2..aa43854 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -168,6 +168,18 @@ config SND_SOC_EUKREA_TLV320
Enable I2S based access to the TLV320AIC23B codec attached
to the SSI interface
+config SND_SOC_IMX_WM8962
+ tristate "SoC Audio support for i.MX boards with wm8962"
+ depends on OF && I2C
+ select SND_SOC_WM8962
+ select SND_SOC_IMX_PCM_DMA
+ select SND_SOC_IMX_AUDMUX
+ select SND_SOC_FSL_SSI
+ select SND_SOC_FSL_UTILS
+ help
+ Say Y if you want to add support for SoC audio on an i.MX board with
+ a wm8962 codec.
+
config SND_SOC_IMX_SGTL5000
tristate "SoC Audio support for i.MX boards with sgtl5000"
depends on OF && I2C
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 91883f8..d4b4aa8 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -42,6 +42,7 @@ snd-soc-phycore-ac97-objs := phycore-ac97.o
snd-soc-mx27vis-aic32x4-objs := mx27vis-aic32x4.o
snd-soc-wm1133-ev1-objs := wm1133-ev1.o
snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
+snd-soc-imx-wm8962-objs := imx-wm8962.o
snd-soc-imx-mc13783-objs := imx-mc13783.o
obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
@@ -49,4 +50,5 @@ obj-$(CONFIG_SND_SOC_PHYCORE_AC97) += snd-soc-phycore-ac97.o
obj-$(CONFIG_SND_SOC_MX27VIS_AIC32X4) += snd-soc-mx27vis-aic32x4.o
obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.o
obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
+obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o
obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o
diff --git a/sound/soc/fsl/imx-wm8962.c b/sound/soc/fsl/imx-wm8962.c
new file mode 100644
index 0000000..7aa42d8
--- /dev/null
+++ b/sound/soc/fsl/imx-wm8962.c
@@ -0,0 +1,387 @@
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * Based on imx-sgtl5000.c
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright 2012 Linaro Ltd.
+ *
+ * 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.h>
+#include <linux/of_platform.h>
+#include <linux/of_i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/irq.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <linux/pinctrl/consumer.h>
+
+#include "../codecs/wm8962.h"
+#include "imx-audmux.h"
+
+#define DAI_NAME_SIZE 32
+
+struct imx_wm8962_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 *codec_clk;
+ unsigned int clk_frequency;
+};
+
+struct imx_priv {
+ int hp_gpio;
+ int hp_active_low;
+ int hp_status;
+ int amic_gpio;
+ int amic_active_low;
+ int amic_status;
+ struct platform_device *pdev;
+ struct snd_pcm_substream *first_stream;
+ struct snd_pcm_substream *second_stream;
+};
+static struct imx_priv card_priv;
+
+static const struct snd_soc_dapm_widget imx_wm8962_dapm_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
+ SND_SOC_DAPM_MIC("AMIC", NULL),
+ SND_SOC_DAPM_MIC("DMIC", NULL),
+};
+
+static int check_hw_params(struct snd_pcm_substream *substream,
+ snd_pcm_format_t sample_format, unsigned int sample_rate)
+{
+ struct imx_priv *priv = &card_priv;
+ struct device *dev = substream->pcm->card->dev;
+
+ substream->runtime->sample_bits =
+ snd_pcm_format_physical_width(sample_format);
+ substream->runtime->rate = sample_rate;
+ substream->runtime->format = sample_format;
+
+ if (!priv->first_stream) {
+ priv->first_stream = substream;
+ } else {
+ priv->second_stream = substream;
+
+ if (priv->first_stream->runtime->rate !=
+ priv->second_stream->runtime->rate) {
+ dev_err(dev, "KEEP THE SAME SAMPLE RATE: %d!\n",
+ priv->first_stream->runtime->rate);
+ return -EINVAL;
+ }
+ if (priv->first_stream->runtime->sample_bits !=
+ priv->second_stream->runtime->sample_bits) {
+ snd_pcm_format_t first_format =
+ priv->first_stream->runtime->format;
+
+ dev_err(dev, "KEEP THE SAME FORMAT: %s!\n",
+ snd_pcm_format_name(first_format));
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+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 device *dev = substream->pcm->card->dev;
+ struct imx_priv *priv = &card_priv;
+ struct imx_wm8962_data *data = platform_get_drvdata(priv->pdev);
+ unsigned int sample_rate = params_rate(params);
+ unsigned int sample_format = params_format(params);
+ int ret = 0;
+ unsigned int pll_out;
+
+ /*
+ * WM8962 doesn't support two substreams in different sample rates or
+ * sample formats. So check the two parameters of two substreams' when
+ * there're two substreams of playback and of capture in the same time.
+ */
+ ret = check_hw_params(substream, sample_format, sample_rate);
+ if (ret < 0) {
+ dev_err(dev, "Failed to match hw params: %d\n", ret);
+ return ret;
+ }
+
+ if (sample_format == SNDRV_PCM_FORMAT_S24_LE)
+ pll_out = sample_rate * 384;
+ else
+ pll_out = sample_rate * 256;
+
+ ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL, WM8962_FLL_MCLK,
+ data->clk_frequency, pll_out);
+ if (ret < 0) {
+ dev_err(dev, "Failed to start FLL: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_FLL,
+ pll_out, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set SYSCLK: %d\n", ret);
+ return ret;
+ }
+
+ 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 device *dev = substream->pcm->card->dev;
+ struct imx_priv *priv = &card_priv;
+ struct imx_wm8962_data *data = platform_get_drvdata(priv->pdev);
+ int ret;
+
+ /* We don't need to handle anything if there's no substream running */
+ if (!priv->first_stream)
+ return 0;
+
+ if (priv->first_stream == substream)
+ priv->first_stream = priv->second_stream;
+ priv->second_stream = NULL;
+
+ if (!priv->first_stream) {
+ /*
+ * SYSCLK of wm8962's not disabled yet. If we wanna close FLL,
+ * we need to keep SYSCLK alive by changing its source to MCLK.
+ */
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
+ data->clk_frequency, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set SYSCLK: %d\n", ret);
+ return ret;
+ }
+
+ /* Disable FLL and let codec do pm_runtime_put() */
+ ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL, 0, 0, 0);
+ if (ret < 0) {
+ dev_err(dev, "Failed to disable FLL: %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static struct snd_soc_ops imx_hifi_ops = {
+ .hw_params = imx_hifi_hw_params,
+ .hw_free = imx_hifi_hw_free,
+};
+
+static int imx_wm8962_late_probe(struct snd_soc_card *card)
+{
+ struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
+ struct imx_priv *priv = &card_priv;
+ struct imx_wm8962_data *data = platform_get_drvdata(priv->pdev);
+ int ret;
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
+ data->clk_frequency, SND_SOC_CLOCK_IN);
+ if (ret < 0)
+ dev_err(card->dev, "Failed to set sysclk in %s\n", __func__);
+
+ return ret;
+}
+
+static int imx_wm8962_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *ssi_np, *codec_np;
+ struct platform_device *ssi_pdev;
+ struct imx_priv *priv = &card_priv;
+ struct i2c_client *codec_dev;
+ struct imx_wm8962_data *data;
+ int int_port, ext_port;
+ int ret;
+
+ priv->pdev = pdev;
+
+ ret = of_property_read_u32(np, "mux-int-port", &int_port);
+ if (ret) {
+ dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
+ return ret;
+ }
+ ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
+ if (ret) {
+ dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
+ return ret;
+ }
+
+ /*
+ * The port numbering in the hardware manual starts at 1, while
+ * the audmux API expects it starts at 0.
+ */
+ int_port--;
+ ext_port--;
+ ret = imx_audmux_v2_configure_port(int_port,
+ IMX_AUDMUX_V2_PTCR_SYN |
+ IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
+ IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
+ IMX_AUDMUX_V2_PTCR_TFSDIR |
+ IMX_AUDMUX_V2_PTCR_TCLKDIR,
+ IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
+ if (ret) {
+ dev_err(&pdev->dev, "audmux internal port setup failed\n");
+ return ret;
+ }
+ imx_audmux_v2_configure_port(ext_port,
+ IMX_AUDMUX_V2_PTCR_SYN,
+ IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
+ if (ret) {
+ dev_err(&pdev->dev, "audmux external port setup failed\n");
+ return ret;
+ }
+
+ ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
+ codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
+ if (!ssi_np || !codec_np) {
+ dev_err(&pdev->dev, "phandle missing or invalid\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ ssi_pdev = of_find_device_by_node(ssi_np);
+ if (!ssi_pdev) {
+ dev_err(&pdev->dev, "failed to find SSI platform device\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+ codec_dev = of_find_i2c_device_by_node(codec_np);
+ if (!codec_dev || !codec_dev->driver) {
+ dev_err(&pdev->dev, "failed to find codec platform device\n");
+ return -EINVAL;
+ }
+
+ priv->hp_gpio = of_get_named_gpio_flags(np, "hp-det-gpios", 0,
+ (enum of_gpio_flags *)&priv->hp_active_low);
+ priv->amic_gpio = of_get_named_gpio_flags(np, "mic-det-gpios", 0,
+ (enum of_gpio_flags *)&priv->amic_active_low);
+
+ priv->first_stream = NULL;
+ priv->second_stream = NULL;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ data->codec_clk = clk_get(&codec_dev->dev, NULL);
+ if (IS_ERR(data->codec_clk)) {
+ /* assuming clock enabled by default */
+ data->codec_clk = NULL;
+ ret = of_property_read_u32(codec_np, "clock-frequency",
+ &data->clk_frequency);
+ if (ret) {
+ dev_err(&codec_dev->dev,
+ "clock-frequency missing or invalid\n");
+ goto fail;
+ }
+ } else {
+ data->clk_frequency = clk_get_rate(data->codec_clk);
+ clk_prepare_enable(data->codec_clk);
+ }
+
+ data->dai.name = "HiFi";
+ data->dai.stream_name = "HiFi";
+ data->dai.codec_dai_name = "wm8962";
+ data->dai.codec_of_node = codec_np;
+ data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
+ data->dai.platform_of_node = ssi_np;
+ data->dai.ops = &imx_hifi_ops,
+ data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM;
+
+ data->card.dev = &pdev->dev;
+ ret = snd_soc_of_parse_card_name(&data->card, "model");
+ if (ret)
+ goto clk_fail;
+ ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
+ if (ret)
+ goto clk_fail;
+ data->card.num_links = 1;
+ data->card.dai_link = &data->dai;
+ data->card.dapm_widgets = imx_wm8962_dapm_widgets;
+ data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);
+
+ data->card.late_probe = imx_wm8962_late_probe,
+
+ ret = snd_soc_register_card(&data->card);
+ if (ret) {
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+ goto clk_fail;
+ }
+
+ platform_set_drvdata(pdev, data);
+ of_node_put(ssi_np);
+ of_node_put(codec_np);
+
+ return 0;
+
+clk_fail:
+ if (data->codec_clk) {
+ clk_disable_unprepare(data->codec_clk);
+ clk_put(data->codec_clk);
+ }
+fail:
+ if (ssi_np)
+ of_node_put(ssi_np);
+ if (codec_np)
+ of_node_put(codec_np);
+
+ return ret;
+}
+
+static int imx_wm8962_remove(struct platform_device *pdev)
+{
+ struct imx_wm8962_data *data = platform_get_drvdata(pdev);
+
+ if (data->codec_clk) {
+ clk_disable_unprepare(data->codec_clk);
+ clk_put(data->codec_clk);
+ }
+ snd_soc_unregister_card(&data->card);
+
+ return 0;
+}
+
+static const struct of_device_id imx_wm8962_dt_ids[] = {
+ { .compatible = "fsl,imx-audio-wm8962", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
+
+static struct platform_driver imx_wm8962_driver = {
+ .driver = {
+ .name = "imx-wm8962",
+ .owner = THIS_MODULE,
+ .of_match_table = imx_wm8962_dt_ids,
+ },
+ .probe = imx_wm8962_probe,
+ .remove = imx_wm8962_remove,
+};
+module_platform_driver(imx_wm8962_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-wm8962");
--
1.7.1
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