602 lines
15 KiB
C
602 lines
15 KiB
C
/*
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* ASoC simple sound card support
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*
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* Copyright (C) 2012 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/platform_device.h>
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#include <linux/string.h>
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#include <sound/jack.h>
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#include <sound/simple_card.h>
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#include <sound/soc-dai.h>
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#include <sound/soc.h>
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struct asoc_simple_jack {
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struct snd_soc_jack jack;
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struct snd_soc_jack_pin pin;
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struct snd_soc_jack_gpio gpio;
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};
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struct simple_card_data {
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struct snd_soc_card snd_card;
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struct simple_dai_props {
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struct asoc_simple_dai cpu_dai;
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struct asoc_simple_dai codec_dai;
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unsigned int mclk_fs;
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} *dai_props;
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unsigned int mclk_fs;
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struct asoc_simple_jack hp_jack;
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struct asoc_simple_jack mic_jack;
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struct snd_soc_dai_link dai_link[]; /* dynamically allocated */
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};
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#define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
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#define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + i)
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#define simple_priv_to_props(priv, i) ((priv)->dai_props + i)
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#define PREFIX "simple-audio-card,"
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#define asoc_simple_card_init_hp(card, sjack, prefix)\
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asoc_simple_card_init_jack(card, sjack, 1, prefix)
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#define asoc_simple_card_init_mic(card, sjack, prefix)\
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asoc_simple_card_init_jack(card, sjack, 0, prefix)
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static int asoc_simple_card_init_jack(struct snd_soc_card *card,
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struct asoc_simple_jack *sjack,
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int is_hp, char *prefix)
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{
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struct device *dev = card->dev;
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enum of_gpio_flags flags;
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char prop[128];
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char *pin_name;
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char *gpio_name;
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int mask;
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int det;
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sjack->gpio.gpio = -ENOENT;
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if (is_hp) {
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snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix);
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pin_name = "Headphones";
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gpio_name = "Headphone detection";
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mask = SND_JACK_HEADPHONE;
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} else {
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snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix);
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pin_name = "Mic Jack";
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gpio_name = "Mic detection";
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mask = SND_JACK_MICROPHONE;
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}
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det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags);
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if (det == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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if (gpio_is_valid(det)) {
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sjack->pin.pin = pin_name;
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sjack->pin.mask = mask;
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sjack->gpio.name = gpio_name;
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sjack->gpio.report = mask;
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sjack->gpio.gpio = det;
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sjack->gpio.invert = !!(flags & OF_GPIO_ACTIVE_LOW);
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sjack->gpio.debounce_time = 150;
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snd_soc_card_jack_new(card, pin_name, mask,
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&sjack->jack,
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&sjack->pin, 1);
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snd_soc_jack_add_gpios(&sjack->jack, 1,
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&sjack->gpio);
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}
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return 0;
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}
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static void asoc_simple_card_remove_jack(struct asoc_simple_jack *sjack)
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{
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if (gpio_is_valid(sjack->gpio.gpio))
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snd_soc_jack_free_gpios(&sjack->jack, 1, &sjack->gpio);
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}
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static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct simple_dai_props *dai_props =
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&priv->dai_props[rtd->num];
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int ret;
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ret = clk_prepare_enable(dai_props->cpu_dai.clk);
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if (ret)
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return ret;
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ret = clk_prepare_enable(dai_props->codec_dai.clk);
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if (ret)
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clk_disable_unprepare(dai_props->cpu_dai.clk);
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return ret;
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}
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static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct simple_dai_props *dai_props =
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&priv->dai_props[rtd->num];
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clk_disable_unprepare(dai_props->cpu_dai.clk);
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clk_disable_unprepare(dai_props->codec_dai.clk);
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}
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static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct simple_dai_props *dai_props = &priv->dai_props[rtd->num];
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unsigned int mclk, mclk_fs = 0;
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int ret = 0;
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if (priv->mclk_fs)
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mclk_fs = priv->mclk_fs;
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else if (dai_props->mclk_fs)
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mclk_fs = dai_props->mclk_fs;
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if (mclk_fs) {
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mclk = params_rate(params) * mclk_fs;
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
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SND_SOC_CLOCK_IN);
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if (ret && ret != -ENOTSUPP)
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goto err;
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ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
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SND_SOC_CLOCK_OUT);
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if (ret && ret != -ENOTSUPP)
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goto err;
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}
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return 0;
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err:
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return ret;
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}
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static struct snd_soc_ops asoc_simple_card_ops = {
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.startup = asoc_simple_card_startup,
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.shutdown = asoc_simple_card_shutdown,
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.hw_params = asoc_simple_card_hw_params,
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};
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static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
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struct asoc_simple_dai *set)
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{
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int ret;
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if (set->sysclk) {
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ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
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if (ret && ret != -ENOTSUPP) {
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dev_err(dai->dev, "simple-card: set_sysclk error\n");
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goto err;
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}
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}
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if (set->slots) {
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ret = snd_soc_dai_set_tdm_slot(dai,
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set->tx_slot_mask,
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set->rx_slot_mask,
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set->slots,
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set->slot_width);
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if (ret && ret != -ENOTSUPP) {
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dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
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goto err;
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}
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}
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ret = 0;
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err:
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return ret;
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}
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static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct snd_soc_dai *codec = rtd->codec_dai;
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struct snd_soc_dai *cpu = rtd->cpu_dai;
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struct simple_dai_props *dai_props;
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int ret;
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dai_props = &priv->dai_props[rtd->num];
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ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
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if (ret < 0)
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return ret;
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ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_init_hp(rtd->card, &priv->hp_jack, PREFIX);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_init_mic(rtd->card, &priv->hp_jack, PREFIX);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int
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asoc_simple_card_sub_parse_of(struct device_node *np,
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struct asoc_simple_dai *dai,
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struct device_node **p_node,
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const char **name,
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int *args_count)
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{
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struct of_phandle_args args;
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int ret;
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if (!np)
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return 0;
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/*
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* Get node via "sound-dai = <&phandle port>"
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* it will be used as xxx_of_node on soc_bind_dai_link()
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*/
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ret = of_parse_phandle_with_args(np, "sound-dai",
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"#sound-dai-cells", 0, &args);
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if (ret)
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return ret;
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*p_node = args.np;
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if (args_count)
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*args_count = args.args_count;
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/* Get dai->name */
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if (name) {
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ret = snd_soc_of_get_dai_name(np, name);
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if (ret < 0)
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return ret;
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}
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if (!dai)
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return 0;
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/* Parse TDM slot */
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ret = snd_soc_of_parse_tdm_slot(np, &dai->tx_slot_mask,
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&dai->rx_slot_mask,
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&dai->slots, &dai->slot_width);
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if (ret)
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return ret;
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return 0;
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}
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static int asoc_simple_card_dai_link_of(struct device_node *node,
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struct simple_card_data *priv,
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int idx,
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bool is_top_level_node)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
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struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
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struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
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struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
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struct device_node *cpu = NULL;
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struct device_node *plat = NULL;
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struct device_node *codec = NULL;
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char prop[128];
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char *prefix = "";
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int ret, cpu_args;
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u32 val;
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/* For single DAI link & old style of DT node */
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if (is_top_level_node)
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prefix = PREFIX;
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snprintf(prop, sizeof(prop), "%scpu", prefix);
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cpu = of_get_child_by_name(node, prop);
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snprintf(prop, sizeof(prop), "%splat", prefix);
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plat = of_get_child_by_name(node, prop);
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snprintf(prop, sizeof(prop), "%scodec", prefix);
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codec = of_get_child_by_name(node, prop);
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if (!cpu || !codec) {
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ret = -EINVAL;
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dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
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goto dai_link_of_err;
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}
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ret = asoc_simple_card_parse_daifmt(dev, node, codec,
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prefix, &dai_link->dai_fmt);
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if (ret < 0)
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goto dai_link_of_err;
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if (!of_property_read_u32(node, "mclk-fs", &val))
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dai_props->mclk_fs = val;
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ret = asoc_simple_card_sub_parse_of(cpu, &dai_props->cpu_dai,
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&dai_link->cpu_of_node,
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&dai_link->cpu_dai_name,
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&cpu_args);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_sub_parse_of(codec, &dai_props->codec_dai,
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&dai_link->codec_of_node,
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&dai_link->codec_dai_name, NULL);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_sub_parse_of(plat, NULL,
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&dai_link->platform_of_node,
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NULL, NULL);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_parse_clk_cpu(cpu, dai_link, cpu_dai);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_parse_clk_codec(codec, dai_link, codec_dai);
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if (ret < 0)
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goto dai_link_of_err;
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if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
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ret = -EINVAL;
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goto dai_link_of_err;
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}
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/* Assumes platform == cpu */
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if (!dai_link->platform_of_node)
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dai_link->platform_of_node = dai_link->cpu_of_node;
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ret = asoc_simple_card_set_dailink_name(dev, dai_link,
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"%s-%s",
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dai_link->cpu_dai_name,
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dai_link->codec_dai_name);
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if (ret < 0)
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goto dai_link_of_err;
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dai_link->ops = &asoc_simple_card_ops;
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dai_link->init = asoc_simple_card_dai_init;
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dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
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dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
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dev_dbg(dev, "\tcpu : %s / %d\n",
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dai_link->cpu_dai_name,
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dai_props->cpu_dai.sysclk);
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dev_dbg(dev, "\tcodec : %s / %d\n",
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dai_link->codec_dai_name,
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dai_props->codec_dai.sysclk);
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/*
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* In soc_bind_dai_link() will check cpu name after
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* of_node matching if dai_link has cpu_dai_name.
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* but, it will never match if name was created by
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* fmt_single_name() remove cpu_dai_name if cpu_args
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* was 0. See:
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* fmt_single_name()
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* fmt_multiple_name()
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*/
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if (!cpu_args)
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dai_link->cpu_dai_name = NULL;
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dai_link_of_err:
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of_node_put(cpu);
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of_node_put(codec);
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return ret;
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}
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static int asoc_simple_card_parse_of(struct device_node *node,
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struct simple_card_data *priv)
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{
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struct device *dev = simple_priv_to_dev(priv);
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u32 val;
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int ret;
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if (!node)
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return -EINVAL;
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/* The off-codec widgets */
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if (of_property_read_bool(node, PREFIX "widgets")) {
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ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
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PREFIX "widgets");
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if (ret)
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return ret;
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}
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/* DAPM routes */
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if (of_property_read_bool(node, PREFIX "routing")) {
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ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
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PREFIX "routing");
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if (ret)
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return ret;
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}
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/* Factor to mclk, used in hw_params() */
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ret = of_property_read_u32(node, PREFIX "mclk-fs", &val);
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if (ret == 0)
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priv->mclk_fs = val;
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/* Single/Muti DAI link(s) & New style of DT node */
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if (of_get_child_by_name(node, PREFIX "dai-link")) {
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struct device_node *np = NULL;
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int i = 0;
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for_each_child_of_node(node, np) {
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dev_dbg(dev, "\tlink %d:\n", i);
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ret = asoc_simple_card_dai_link_of(np, priv,
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i, false);
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if (ret < 0) {
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of_node_put(np);
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return ret;
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}
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i++;
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}
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} else {
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/* For single DAI link & old style of DT node */
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ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
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if (ret < 0)
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return ret;
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}
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ret = asoc_simple_card_parse_card_name(&priv->snd_card, PREFIX);
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if (ret)
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return ret;
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return 0;
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}
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/* Decrease the reference count of the device nodes */
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static int asoc_simple_card_unref(struct snd_soc_card *card)
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{
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struct snd_soc_dai_link *dai_link;
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int num_links;
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for (num_links = 0, dai_link = card->dai_link;
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num_links < card->num_links;
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num_links++, dai_link++) {
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of_node_put(dai_link->cpu_of_node);
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of_node_put(dai_link->codec_of_node);
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}
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return 0;
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}
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static int asoc_simple_card_probe(struct platform_device *pdev)
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{
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struct simple_card_data *priv;
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struct snd_soc_dai_link *dai_link;
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struct device_node *np = pdev->dev.of_node;
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struct device *dev = &pdev->dev;
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int num_links, ret;
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/* Get the number of DAI links */
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if (np && of_get_child_by_name(np, PREFIX "dai-link"))
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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;
|
|
|
|
/* 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);
|
|
|
|
asoc_simple_card_remove_jack(&priv->hp_jack);
|
|
asoc_simple_card_remove_jack(&priv->mic_jack);
|
|
|
|
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",
|
|
.pm = &snd_soc_pm_ops,
|
|
.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>");
|