/* * ASoC simple sound card support * * Copyright (C) 2012 Renesas Solutions Corp. * Kuninori Morimoto * * 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 #include #include #include #include #include #include #include #include #include #include #include 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_jack_new(codec->codec, "Headphones", SND_JACK_HEADPHONE, &simple_card_hp_jack); snd_soc_jack_add_pins(&simple_card_hp_jack, ARRAY_SIZE(simple_card_hp_jack_pins), 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_jack_new(codec->codec, "Mic Jack", SND_JACK_MICROPHONE, &simple_card_mic_jack); snd_soc_jack_add_pins(&simple_card_mic_jack, ARRAY_SIZE(simple_card_mic_jack_pins), 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 = " * 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); 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 ");