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-rw-r--r--sound/soc/generic/simple-card.c622
1 files changed, 622 insertions, 0 deletions
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
new file mode 100644
index 000000000..33feee9ca
--- /dev/null
+++ b/sound/soc/generic/simple-card.c
@@ -0,0 +1,622 @@
+/*
+ * ASoC simple sound card support
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.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.
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <sound/jack.h>
+#include <sound/simple_card.h>
+#include <sound/soc-dai.h>
+#include <sound/soc.h>
+
+struct simple_card_data {
+ struct snd_soc_card snd_card;
+ struct simple_dai_props {
+ struct asoc_simple_dai cpu_dai;
+ struct asoc_simple_dai codec_dai;
+ } *dai_props;
+ unsigned int mclk_fs;
+ int gpio_hp_det;
+ int gpio_hp_det_invert;
+ int gpio_mic_det;
+ int gpio_mic_det_invert;
+ struct snd_soc_dai_link dai_link[]; /* dynamically allocated */
+};
+
+#define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
+#define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + i)
+#define simple_priv_to_props(priv, i) ((priv)->dai_props + i)
+
+static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct simple_dai_props *dai_props =
+ &priv->dai_props[rtd - rtd->card->rtd];
+ int ret;
+
+ ret = clk_prepare_enable(dai_props->cpu_dai.clk);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(dai_props->codec_dai.clk);
+ if (ret)
+ clk_disable_unprepare(dai_props->cpu_dai.clk);
+
+ return ret;
+}
+
+static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct simple_dai_props *dai_props =
+ &priv->dai_props[rtd - rtd->card->rtd];
+
+ clk_disable_unprepare(dai_props->cpu_dai.clk);
+
+ clk_disable_unprepare(dai_props->codec_dai.clk);
+}
+
+static int asoc_simple_card_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 simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ unsigned int mclk;
+ int ret = 0;
+
+ if (priv->mclk_fs) {
+ mclk = params_rate(params) * priv->mclk_fs;
+ ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
+ SND_SOC_CLOCK_IN);
+ }
+
+ return ret;
+}
+
+static struct snd_soc_ops asoc_simple_card_ops = {
+ .startup = asoc_simple_card_startup,
+ .shutdown = asoc_simple_card_shutdown,
+ .hw_params = asoc_simple_card_hw_params,
+};
+
+static struct snd_soc_jack simple_card_hp_jack;
+static struct snd_soc_jack_pin simple_card_hp_jack_pins[] = {
+ {
+ .pin = "Headphones",
+ .mask = SND_JACK_HEADPHONE,
+ },
+};
+static struct snd_soc_jack_gpio simple_card_hp_jack_gpio = {
+ .name = "Headphone detection",
+ .report = SND_JACK_HEADPHONE,
+ .debounce_time = 150,
+};
+
+static struct snd_soc_jack simple_card_mic_jack;
+static struct snd_soc_jack_pin simple_card_mic_jack_pins[] = {
+ {
+ .pin = "Mic Jack",
+ .mask = SND_JACK_MICROPHONE,
+ },
+};
+static struct snd_soc_jack_gpio simple_card_mic_jack_gpio = {
+ .name = "Mic detection",
+ .report = SND_JACK_MICROPHONE,
+ .debounce_time = 150,
+};
+
+static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
+ struct asoc_simple_dai *set)
+{
+ int ret;
+
+ if (set->sysclk) {
+ ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
+ if (ret && ret != -ENOTSUPP) {
+ dev_err(dai->dev, "simple-card: set_sysclk error\n");
+ goto err;
+ }
+ }
+
+ if (set->slots) {
+ ret = snd_soc_dai_set_tdm_slot(dai, 0, 0,
+ set->slots,
+ set->slot_width);
+ if (ret && ret != -ENOTSUPP) {
+ dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
+ goto err;
+ }
+ }
+
+ ret = 0;
+
+err:
+ return ret;
+}
+
+static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct snd_soc_dai *codec = rtd->codec_dai;
+ struct snd_soc_dai *cpu = rtd->cpu_dai;
+ struct simple_dai_props *dai_props;
+ int num, ret;
+
+ num = rtd - rtd->card->rtd;
+ dai_props = &priv->dai_props[num];
+ ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
+ if (ret < 0)
+ return ret;
+
+ ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
+ if (ret < 0)
+ return ret;
+
+ if (gpio_is_valid(priv->gpio_hp_det)) {
+ snd_soc_card_jack_new(rtd->card, "Headphones",
+ SND_JACK_HEADPHONE,
+ &simple_card_hp_jack,
+ simple_card_hp_jack_pins,
+ ARRAY_SIZE(simple_card_hp_jack_pins));
+
+ simple_card_hp_jack_gpio.gpio = priv->gpio_hp_det;
+ simple_card_hp_jack_gpio.invert = priv->gpio_hp_det_invert;
+ snd_soc_jack_add_gpios(&simple_card_hp_jack, 1,
+ &simple_card_hp_jack_gpio);
+ }
+
+ if (gpio_is_valid(priv->gpio_mic_det)) {
+ snd_soc_card_jack_new(rtd->card, "Mic Jack",
+ SND_JACK_MICROPHONE,
+ &simple_card_mic_jack,
+ simple_card_mic_jack_pins,
+ ARRAY_SIZE(simple_card_mic_jack_pins));
+ simple_card_mic_jack_gpio.gpio = priv->gpio_mic_det;
+ simple_card_mic_jack_gpio.invert = priv->gpio_mic_det_invert;
+ snd_soc_jack_add_gpios(&simple_card_mic_jack, 1,
+ &simple_card_mic_jack_gpio);
+ }
+ return 0;
+}
+
+static int
+asoc_simple_card_sub_parse_of(struct device_node *np,
+ struct asoc_simple_dai *dai,
+ struct device_node **p_node,
+ const char **name,
+ int *args_count)
+{
+ struct of_phandle_args args;
+ struct clk *clk;
+ u32 val;
+ int ret;
+
+ /*
+ * Get node via "sound-dai = <&phandle port>"
+ * it will be used as xxx_of_node on soc_bind_dai_link()
+ */
+ ret = of_parse_phandle_with_args(np, "sound-dai",
+ "#sound-dai-cells", 0, &args);
+ if (ret)
+ return ret;
+
+ *p_node = args.np;
+
+ if (args_count)
+ *args_count = args.args_count;
+
+ /* Get dai->name */
+ ret = snd_soc_of_get_dai_name(np, name);
+ if (ret < 0)
+ return ret;
+
+ /* Parse TDM slot */
+ ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
+ if (ret)
+ return ret;
+
+ /*
+ * Parse dai->sysclk come from "clocks = <&xxx>"
+ * (if system has common clock)
+ * or "system-clock-frequency = <xxx>"
+ * or device's module clock.
+ */
+ if (of_property_read_bool(np, "clocks")) {
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ return ret;
+ }
+
+ dai->sysclk = clk_get_rate(clk);
+ dai->clk = clk;
+ } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
+ dai->sysclk = val;
+ } else {
+ clk = of_clk_get(args.np, 0);
+ if (!IS_ERR(clk))
+ dai->sysclk = clk_get_rate(clk);
+ }
+
+ return 0;
+}
+
+static int asoc_simple_card_parse_daifmt(struct device_node *node,
+ struct simple_card_data *priv,
+ struct device_node *codec,
+ char *prefix, int idx)
+{
+ struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
+ struct device *dev = simple_priv_to_dev(priv);
+ struct device_node *bitclkmaster = NULL;
+ struct device_node *framemaster = NULL;
+ unsigned int daifmt;
+
+ daifmt = snd_soc_of_parse_daifmt(node, prefix,
+ &bitclkmaster, &framemaster);
+ daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
+
+ if (strlen(prefix) && !bitclkmaster && !framemaster) {
+ /*
+ * No dai-link level and master setting was not found from
+ * sound node level, revert back to legacy DT parsing and
+ * take the settings from codec node.
+ */
+ dev_dbg(dev, "Revert to legacy daifmt parsing\n");
+
+ daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
+ (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
+ } else {
+ if (codec == bitclkmaster)
+ daifmt |= (codec == framemaster) ?
+ SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
+ else
+ daifmt |= (codec == framemaster) ?
+ SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
+ }
+
+ dai_link->dai_fmt = daifmt;
+
+ of_node_put(bitclkmaster);
+ of_node_put(framemaster);
+
+ return 0;
+}
+
+static int asoc_simple_card_dai_link_of(struct device_node *node,
+ struct simple_card_data *priv,
+ int idx,
+ bool is_top_level_node)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+ struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
+ struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
+ struct device_node *cpu = NULL;
+ struct device_node *codec = NULL;
+ char *name;
+ char prop[128];
+ char *prefix = "";
+ int ret, cpu_args;
+
+ /* For single DAI link & old style of DT node */
+ if (is_top_level_node)
+ prefix = "simple-audio-card,";
+
+ snprintf(prop, sizeof(prop), "%scpu", prefix);
+ cpu = of_get_child_by_name(node, prop);
+
+ snprintf(prop, sizeof(prop), "%scodec", prefix);
+ codec = of_get_child_by_name(node, prop);
+
+ if (!cpu || !codec) {
+ ret = -EINVAL;
+ dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
+ goto dai_link_of_err;
+ }
+
+ ret = asoc_simple_card_parse_daifmt(node, priv,
+ codec, prefix, idx);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_sub_parse_of(cpu, &dai_props->cpu_dai,
+ &dai_link->cpu_of_node,
+ &dai_link->cpu_dai_name,
+ &cpu_args);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_sub_parse_of(codec, &dai_props->codec_dai,
+ &dai_link->codec_of_node,
+ &dai_link->codec_dai_name, NULL);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
+ ret = -EINVAL;
+ goto dai_link_of_err;
+ }
+
+ /* Simple Card assumes platform == cpu */
+ dai_link->platform_of_node = dai_link->cpu_of_node;
+
+ /* DAI link name is created from CPU/CODEC dai name */
+ name = devm_kzalloc(dev,
+ strlen(dai_link->cpu_dai_name) +
+ strlen(dai_link->codec_dai_name) + 2,
+ GFP_KERNEL);
+ if (!name) {
+ ret = -ENOMEM;
+ goto dai_link_of_err;
+ }
+
+ sprintf(name, "%s-%s", dai_link->cpu_dai_name,
+ dai_link->codec_dai_name);
+ dai_link->name = dai_link->stream_name = name;
+ dai_link->ops = &asoc_simple_card_ops;
+ dai_link->init = asoc_simple_card_dai_init;
+
+ dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
+ dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
+ dev_dbg(dev, "\tcpu : %s / %d\n",
+ dai_link->cpu_dai_name,
+ dai_props->cpu_dai.sysclk);
+ dev_dbg(dev, "\tcodec : %s / %d\n",
+ dai_link->codec_dai_name,
+ dai_props->codec_dai.sysclk);
+
+ /*
+ * In soc_bind_dai_link() will check cpu name after
+ * of_node matching if dai_link has cpu_dai_name.
+ * but, it will never match if name was created by
+ * fmt_single_name() remove cpu_dai_name if cpu_args
+ * was 0. See:
+ * fmt_single_name()
+ * fmt_multiple_name()
+ */
+ if (!cpu_args)
+ dai_link->cpu_dai_name = NULL;
+
+dai_link_of_err:
+ of_node_put(cpu);
+ of_node_put(codec);
+
+ return ret;
+}
+
+static int asoc_simple_card_parse_of(struct device_node *node,
+ struct simple_card_data *priv)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+ enum of_gpio_flags flags;
+ u32 val;
+ int ret;
+
+ if (!node)
+ return -EINVAL;
+
+ /* Parse the card name from DT */
+ snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
+
+ /* The off-codec widgets */
+ if (of_property_read_bool(node, "simple-audio-card,widgets")) {
+ ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
+ "simple-audio-card,widgets");
+ if (ret)
+ return ret;
+ }
+
+ /* DAPM routes */
+ if (of_property_read_bool(node, "simple-audio-card,routing")) {
+ ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
+ "simple-audio-card,routing");
+ if (ret)
+ return ret;
+ }
+
+ /* Factor to mclk, used in hw_params() */
+ ret = of_property_read_u32(node, "simple-audio-card,mclk-fs", &val);
+ if (ret == 0)
+ priv->mclk_fs = val;
+
+ dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
+ priv->snd_card.name : "");
+
+ /* Single/Muti DAI link(s) & New style of DT node */
+ if (of_get_child_by_name(node, "simple-audio-card,dai-link")) {
+ struct device_node *np = NULL;
+ int i = 0;
+
+ for_each_child_of_node(node, np) {
+ dev_dbg(dev, "\tlink %d:\n", i);
+ ret = asoc_simple_card_dai_link_of(np, priv,
+ i, false);
+ if (ret < 0) {
+ of_node_put(np);
+ return ret;
+ }
+ i++;
+ }
+ } else {
+ /* For single DAI link & old style of DT node */
+ ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
+ if (ret < 0)
+ return ret;
+ }
+
+ priv->gpio_hp_det = of_get_named_gpio_flags(node,
+ "simple-audio-card,hp-det-gpio", 0, &flags);
+ priv->gpio_hp_det_invert = !!(flags & OF_GPIO_ACTIVE_LOW);
+ if (priv->gpio_hp_det == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ priv->gpio_mic_det = of_get_named_gpio_flags(node,
+ "simple-audio-card,mic-det-gpio", 0, &flags);
+ priv->gpio_mic_det_invert = !!(flags & OF_GPIO_ACTIVE_LOW);
+ if (priv->gpio_mic_det == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ if (!priv->snd_card.name)
+ priv->snd_card.name = priv->snd_card.dai_link->name;
+
+ return 0;
+}
+
+/* Decrease the reference count of the device nodes */
+static int asoc_simple_card_unref(struct snd_soc_card *card)
+{
+ struct snd_soc_dai_link *dai_link;
+ int num_links;
+
+ for (num_links = 0, dai_link = card->dai_link;
+ num_links < card->num_links;
+ num_links++, dai_link++) {
+ of_node_put(dai_link->cpu_of_node);
+ of_node_put(dai_link->codec_of_node);
+ }
+ return 0;
+}
+
+static int asoc_simple_card_probe(struct platform_device *pdev)
+{
+ struct simple_card_data *priv;
+ struct snd_soc_dai_link *dai_link;
+ struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ int num_links, ret;
+
+ /* Get the number of DAI links */
+ if (np && of_get_child_by_name(np, "simple-audio-card,dai-link"))
+ num_links = of_get_child_count(np);
+ else
+ num_links = 1;
+
+ /* Allocate the private data and the DAI link array */
+ priv = devm_kzalloc(dev,
+ sizeof(*priv) + sizeof(*dai_link) * num_links,
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ /* Init snd_soc_card */
+ priv->snd_card.owner = THIS_MODULE;
+ priv->snd_card.dev = dev;
+ dai_link = priv->dai_link;
+ priv->snd_card.dai_link = dai_link;
+ priv->snd_card.num_links = num_links;
+
+ priv->gpio_hp_det = -ENOENT;
+ priv->gpio_mic_det = -ENOENT;
+
+ /* Get room for the other properties */
+ priv->dai_props = devm_kzalloc(dev,
+ sizeof(*priv->dai_props) * num_links,
+ GFP_KERNEL);
+ if (!priv->dai_props)
+ return -ENOMEM;
+
+ if (np && of_device_is_available(np)) {
+
+ ret = asoc_simple_card_parse_of(np, priv);
+ if (ret < 0) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "parse error %d\n", ret);
+ goto err;
+ }
+
+ } else {
+ struct asoc_simple_card_info *cinfo;
+
+ cinfo = dev->platform_data;
+ if (!cinfo) {
+ dev_err(dev, "no info for asoc-simple-card\n");
+ return -EINVAL;
+ }
+
+ if (!cinfo->name ||
+ !cinfo->codec_dai.name ||
+ !cinfo->codec ||
+ !cinfo->platform ||
+ !cinfo->cpu_dai.name) {
+ dev_err(dev, "insufficient asoc_simple_card_info settings\n");
+ return -EINVAL;
+ }
+
+ priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name;
+ dai_link->name = cinfo->name;
+ dai_link->stream_name = cinfo->name;
+ dai_link->platform_name = cinfo->platform;
+ dai_link->codec_name = cinfo->codec;
+ dai_link->cpu_dai_name = cinfo->cpu_dai.name;
+ dai_link->codec_dai_name = cinfo->codec_dai.name;
+ dai_link->dai_fmt = cinfo->daifmt;
+ dai_link->init = asoc_simple_card_dai_init;
+ memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
+ sizeof(priv->dai_props->cpu_dai));
+ memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
+ sizeof(priv->dai_props->codec_dai));
+
+ }
+
+ snd_soc_card_set_drvdata(&priv->snd_card, priv);
+
+ ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
+ if (ret >= 0)
+ return ret;
+
+err:
+ asoc_simple_card_unref(&priv->snd_card);
+ return ret;
+}
+
+static int asoc_simple_card_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
+
+ if (gpio_is_valid(priv->gpio_hp_det))
+ snd_soc_jack_free_gpios(&simple_card_hp_jack, 1,
+ &simple_card_hp_jack_gpio);
+ if (gpio_is_valid(priv->gpio_mic_det))
+ snd_soc_jack_free_gpios(&simple_card_mic_jack, 1,
+ &simple_card_mic_jack_gpio);
+
+ return asoc_simple_card_unref(card);
+}
+
+static const struct of_device_id asoc_simple_of_match[] = {
+ { .compatible = "simple-audio-card", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
+
+static struct platform_driver asoc_simple_card = {
+ .driver = {
+ .name = "asoc-simple-card",
+ .of_match_table = asoc_simple_of_match,
+ },
+ .probe = asoc_simple_card_probe,
+ .remove = asoc_simple_card_remove,
+};
+
+module_platform_driver(asoc_simple_card);
+
+MODULE_ALIAS("platform:asoc-simple-card");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ASoC Simple Sound Card");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");