// SPDX-License-Identifier: GPL-2.0 // // simple-card-utils.c // // Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> #include <linux/clk.h> #include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_gpio.h> #include <linux/of_graph.h> #include <sound/jack.h> #include <sound/simple_card_utils.h> void asoc_simple_convert_fixup(struct asoc_simple_data *data, struct snd_pcm_hw_params *params) { struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); if (data->convert_rate) rate->min = rate->max = data->convert_rate; if (data->convert_channels) channels->min = channels->max = data->convert_channels; } EXPORT_SYMBOL_GPL(asoc_simple_convert_fixup); void asoc_simple_parse_convert(struct device_node *np, char *prefix, struct asoc_simple_data *data) { char prop[128]; if (!prefix) prefix = ""; /* sampling rate convert */ snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate"); of_property_read_u32(np, prop, &data->convert_rate); /* channels transfer */ snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels"); of_property_read_u32(np, prop, &data->convert_channels); } EXPORT_SYMBOL_GPL(asoc_simple_parse_convert); int asoc_simple_parse_daifmt(struct device *dev, struct device_node *node, struct device_node *codec, char *prefix, unsigned int *retfmt) { 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 (!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; } of_node_put(bitclkmaster); of_node_put(framemaster); *retfmt = daifmt; return 0; } EXPORT_SYMBOL_GPL(asoc_simple_parse_daifmt); int asoc_simple_set_dailink_name(struct device *dev, struct snd_soc_dai_link *dai_link, const char *fmt, ...) { va_list ap; char *name = NULL; int ret = -ENOMEM; va_start(ap, fmt); name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap); va_end(ap); if (name) { ret = 0; dai_link->name = name; dai_link->stream_name = name; } return ret; } EXPORT_SYMBOL_GPL(asoc_simple_set_dailink_name); int asoc_simple_parse_card_name(struct snd_soc_card *card, char *prefix) { int ret; if (!prefix) prefix = ""; /* Parse the card name from DT */ ret = snd_soc_of_parse_card_name(card, "label"); if (ret < 0 || !card->name) { char prop[128]; snprintf(prop, sizeof(prop), "%sname", prefix); ret = snd_soc_of_parse_card_name(card, prop); if (ret < 0) return ret; } if (!card->name && card->dai_link) card->name = card->dai_link->name; return 0; } EXPORT_SYMBOL_GPL(asoc_simple_parse_card_name); static int asoc_simple_clk_enable(struct asoc_simple_dai *dai) { if (dai) return clk_prepare_enable(dai->clk); return 0; } static void asoc_simple_clk_disable(struct asoc_simple_dai *dai) { if (dai) clk_disable_unprepare(dai->clk); } int asoc_simple_parse_clk(struct device *dev, struct device_node *node, struct asoc_simple_dai *simple_dai, struct snd_soc_dai_link_component *dlc) { struct clk *clk; u32 val; /* * Parse dai->sysclk come from "clocks = <&xxx>" * (if system has common clock) * or "system-clock-frequency = <xxx>" * or device's module clock. */ clk = devm_get_clk_from_child(dev, node, NULL); if (!IS_ERR(clk)) { simple_dai->sysclk = clk_get_rate(clk); simple_dai->clk = clk; } else if (!of_property_read_u32(node, "system-clock-frequency", &val)) { simple_dai->sysclk = val; } else { clk = devm_get_clk_from_child(dev, dlc->of_node, NULL); if (!IS_ERR(clk)) simple_dai->sysclk = clk_get_rate(clk); } if (of_property_read_bool(node, "system-clock-direction-out")) simple_dai->clk_direction = SND_SOC_CLOCK_OUT; return 0; } EXPORT_SYMBOL_GPL(asoc_simple_parse_clk); int asoc_simple_startup(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num); struct asoc_simple_dai *dai; int i1, i2, i; int ret; for_each_prop_dai_cpu(props, i1, dai) { ret = asoc_simple_clk_enable(dai); if (ret) goto cpu_err; } for_each_prop_dai_codec(props, i2, dai) { ret = asoc_simple_clk_enable(dai); if (ret) goto codec_err; } return 0; codec_err: for_each_prop_dai_codec(props, i, dai) { if (i >= i2) break; asoc_simple_clk_disable(dai); } cpu_err: for_each_prop_dai_cpu(props, i, dai) { if (i >= i1) break; asoc_simple_clk_disable(dai); } return ret; } EXPORT_SYMBOL_GPL(asoc_simple_startup); void asoc_simple_shutdown(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num); struct asoc_simple_dai *dai; int i; if (props->mclk_fs) { snd_soc_dai_set_sysclk(codec_dai, 0, 0, SND_SOC_CLOCK_IN); snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT); } for_each_prop_dai_cpu(props, i, dai) asoc_simple_clk_disable(dai); for_each_prop_dai_codec(props, i, dai) asoc_simple_clk_disable(dai); } EXPORT_SYMBOL_GPL(asoc_simple_shutdown); static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai, unsigned long rate) { if (!simple_dai) return 0; if (!simple_dai->clk) return 0; if (clk_get_rate(simple_dai->clk) == rate) return 0; return clk_set_rate(simple_dai->clk, rate); } int asoc_simple_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct asoc_simple_dai *pdai; struct snd_soc_dai *sdai; struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num); unsigned int mclk, mclk_fs = 0; int i, ret; if (props->mclk_fs) mclk_fs = props->mclk_fs; if (mclk_fs) { mclk = params_rate(params) * mclk_fs; for_each_prop_dai_codec(props, i, pdai) { ret = asoc_simple_set_clk_rate(pdai, mclk); if (ret < 0) return ret; } for_each_prop_dai_cpu(props, i, pdai) { ret = asoc_simple_set_clk_rate(pdai, mclk); if (ret < 0) return ret; } for_each_rtd_codec_dais(rtd, i, sdai) { ret = snd_soc_dai_set_sysclk(sdai, 0, mclk, SND_SOC_CLOCK_IN); if (ret && ret != -ENOTSUPP) return ret; } for_each_rtd_cpu_dais(rtd, i, sdai) { ret = snd_soc_dai_set_sysclk(sdai, 0, mclk, SND_SOC_CLOCK_OUT); if (ret && ret != -ENOTSUPP) return ret; } } return 0; } EXPORT_SYMBOL_GPL(asoc_simple_hw_params); int asoc_simple_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params) { struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num); asoc_simple_convert_fixup(&dai_props->adata, params); return 0; } EXPORT_SYMBOL_GPL(asoc_simple_be_hw_params_fixup); static int asoc_simple_init_dai(struct snd_soc_dai *dai, struct asoc_simple_dai *simple_dai) { int ret; if (!simple_dai) return 0; if (simple_dai->sysclk) { ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk, simple_dai->clk_direction); if (ret && ret != -ENOTSUPP) { dev_err(dai->dev, "simple-card: set_sysclk error\n"); return ret; } } if (simple_dai->slots) { ret = snd_soc_dai_set_tdm_slot(dai, simple_dai->tx_slot_mask, simple_dai->rx_slot_mask, simple_dai->slots, simple_dai->slot_width); if (ret && ret != -ENOTSUPP) { dev_err(dai->dev, "simple-card: set_tdm_slot error\n"); return ret; } } return 0; } static int asoc_simple_init_dai_link_params(struct snd_soc_pcm_runtime *rtd, struct simple_dai_props *dai_props) { struct snd_soc_dai_link *dai_link = rtd->dai_link; struct snd_soc_component *component; struct snd_soc_pcm_stream *params; struct snd_pcm_hardware hw; int i, ret, stream; /* Only codecs should have non_legacy_dai_naming set. */ for_each_rtd_components(rtd, i, component) { if (!component->driver->non_legacy_dai_naming) return 0; } /* Assumes the capabilities are the same for all supported streams */ for_each_pcm_streams(stream) { ret = snd_soc_runtime_calc_hw(rtd, &hw, stream); if (ret == 0) break; } if (ret < 0) { dev_err(rtd->dev, "simple-card: no valid dai_link params\n"); return ret; } params = devm_kzalloc(rtd->dev, sizeof(*params), GFP_KERNEL); if (!params) return -ENOMEM; params->formats = hw.formats; params->rates = hw.rates; params->rate_min = hw.rate_min; params->rate_max = hw.rate_max; params->channels_min = hw.channels_min; params->channels_max = hw.channels_max; dai_link->params = params; dai_link->num_params = 1; return 0; } int asoc_simple_dai_init(struct snd_soc_pcm_runtime *rtd) { struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num); struct asoc_simple_dai *dai; int i, ret; for_each_prop_dai_codec(props, i, dai) { ret = asoc_simple_init_dai(asoc_rtd_to_codec(rtd, i), dai); if (ret < 0) return ret; } for_each_prop_dai_cpu(props, i, dai) { ret = asoc_simple_init_dai(asoc_rtd_to_cpu(rtd, i), dai); if (ret < 0) return ret; } ret = asoc_simple_init_dai_link_params(rtd, props); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL_GPL(asoc_simple_dai_init); void asoc_simple_canonicalize_platform(struct snd_soc_dai_link_component *platforms, struct snd_soc_dai_link_component *cpus) { /* Assumes platform == cpu */ if (!platforms->of_node) platforms->of_node = cpus->of_node; } EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_platform); void asoc_simple_canonicalize_cpu(struct snd_soc_dai_link_component *cpus, int is_single_links) { /* * 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 (is_single_links) cpus->dai_name = NULL; } EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_cpu); int asoc_simple_clean_reference(struct snd_soc_card *card) { struct snd_soc_dai_link *dai_link; struct snd_soc_dai_link_component *cpu; struct snd_soc_dai_link_component *codec; int i, j; for_each_card_prelinks(card, i, dai_link) { for_each_link_cpus(dai_link, j, cpu) of_node_put(cpu->of_node); for_each_link_codecs(dai_link, j, codec) of_node_put(codec->of_node); } return 0; } EXPORT_SYMBOL_GPL(asoc_simple_clean_reference); int asoc_simple_parse_routing(struct snd_soc_card *card, char *prefix) { struct device_node *node = card->dev->of_node; char prop[128]; if (!prefix) prefix = ""; snprintf(prop, sizeof(prop), "%s%s", prefix, "routing"); if (!of_property_read_bool(node, prop)) return 0; return snd_soc_of_parse_audio_routing(card, prop); } EXPORT_SYMBOL_GPL(asoc_simple_parse_routing); int asoc_simple_parse_widgets(struct snd_soc_card *card, char *prefix) { struct device_node *node = card->dev->of_node; char prop[128]; if (!prefix) prefix = ""; snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets"); if (of_property_read_bool(node, prop)) return snd_soc_of_parse_audio_simple_widgets(card, prop); /* no widgets is not error */ return 0; } EXPORT_SYMBOL_GPL(asoc_simple_parse_widgets); int asoc_simple_parse_pin_switches(struct snd_soc_card *card, char *prefix) { const unsigned int nb_controls_max = 16; const char **strings, *control_name; struct snd_kcontrol_new *controls; struct device *dev = card->dev; unsigned int i, nb_controls; char prop[128]; int ret; if (!prefix) prefix = ""; snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches"); if (!of_property_read_bool(dev->of_node, prop)) return 0; strings = devm_kcalloc(dev, nb_controls_max, sizeof(*strings), GFP_KERNEL); if (!strings) return -ENOMEM; ret = of_property_read_string_array(dev->of_node, prop, strings, nb_controls_max); if (ret < 0) return ret; nb_controls = (unsigned int)ret; controls = devm_kcalloc(dev, nb_controls, sizeof(*controls), GFP_KERNEL); if (!controls) return -ENOMEM; for (i = 0; i < nb_controls; i++) { control_name = devm_kasprintf(dev, GFP_KERNEL, "%s Switch", strings[i]); if (!control_name) return -ENOMEM; controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER; controls[i].name = control_name; controls[i].info = snd_soc_dapm_info_pin_switch; controls[i].get = snd_soc_dapm_get_pin_switch; controls[i].put = snd_soc_dapm_put_pin_switch; controls[i].private_value = (unsigned long)strings[i]; } card->controls = controls; card->num_controls = nb_controls; return 0; } EXPORT_SYMBOL_GPL(asoc_simple_parse_pin_switches); int asoc_simple_init_jack(struct snd_soc_card *card, struct asoc_simple_jack *sjack, int is_hp, char *prefix, char *pin) { struct device *dev = card->dev; enum of_gpio_flags flags; char prop[128]; char *pin_name; char *gpio_name; int mask; int det; if (!prefix) prefix = ""; sjack->gpio.gpio = -ENOENT; if (is_hp) { snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix); pin_name = pin ? pin : "Headphones"; gpio_name = "Headphone detection"; mask = SND_JACK_HEADPHONE; } else { snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix); pin_name = pin ? pin : "Mic Jack"; gpio_name = "Mic detection"; mask = SND_JACK_MICROPHONE; } det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags); if (det == -EPROBE_DEFER) return -EPROBE_DEFER; if (gpio_is_valid(det)) { sjack->pin.pin = pin_name; sjack->pin.mask = mask; sjack->gpio.name = gpio_name; sjack->gpio.report = mask; sjack->gpio.gpio = det; sjack->gpio.invert = !!(flags & OF_GPIO_ACTIVE_LOW); sjack->gpio.debounce_time = 150; snd_soc_card_jack_new(card, pin_name, mask, &sjack->jack, &sjack->pin, 1); snd_soc_jack_add_gpios(&sjack->jack, 1, &sjack->gpio); } return 0; } EXPORT_SYMBOL_GPL(asoc_simple_init_jack); int asoc_simple_init_priv(struct asoc_simple_priv *priv, struct link_info *li) { struct snd_soc_card *card = simple_priv_to_card(priv); struct device *dev = simple_priv_to_dev(priv); struct snd_soc_dai_link *dai_link; struct simple_dai_props *dai_props; struct asoc_simple_dai *dais; struct snd_soc_dai_link_component *dlcs; struct snd_soc_codec_conf *cconf = NULL; int i, dai_num = 0, dlc_num = 0, cnf_num = 0; dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL); dai_link = devm_kcalloc(dev, li->link, sizeof(*dai_link), GFP_KERNEL); if (!dai_props || !dai_link) return -ENOMEM; /* * dais (= CPU+Codec) * dlcs (= CPU+Codec+Platform) */ for (i = 0; i < li->link; i++) { int cc = li->num[i].cpus + li->num[i].codecs; dai_num += cc; dlc_num += cc + li->num[i].platforms; if (!li->num[i].cpus) cnf_num += li->num[i].codecs; } dais = devm_kcalloc(dev, dai_num, sizeof(*dais), GFP_KERNEL); dlcs = devm_kcalloc(dev, dlc_num, sizeof(*dai_props), GFP_KERNEL); if (!dais || !dlcs) return -ENOMEM; if (cnf_num) { cconf = devm_kcalloc(dev, cnf_num, sizeof(*cconf), GFP_KERNEL); if (!cconf) return -ENOMEM; } dev_dbg(dev, "link %d, dais %d, ccnf %d\n", li->link, dai_num, cnf_num); /* dummy CPU/Codec */ priv->dummy.of_node = NULL; priv->dummy.dai_name = "snd-soc-dummy-dai"; priv->dummy.name = "snd-soc-dummy"; priv->dai_props = dai_props; priv->dai_link = dai_link; priv->dais = dais; priv->dlcs = dlcs; priv->codec_conf = cconf; card->dai_link = priv->dai_link; card->num_links = li->link; card->codec_conf = cconf; card->num_configs = cnf_num; for (i = 0; i < li->link; i++) { if (li->num[i].cpus) { /* Normal CPU */ dai_props[i].cpus = dai_link[i].cpus = dlcs; dai_props[i].num.cpus = dai_link[i].num_cpus = li->num[i].cpus; dai_props[i].cpu_dai = dais; dlcs += li->num[i].cpus; dais += li->num[i].cpus; } else { /* DPCM Be's CPU = dummy */ dai_props[i].cpus = dai_link[i].cpus = &priv->dummy; dai_props[i].num.cpus = dai_link[i].num_cpus = 1; } if (li->num[i].codecs) { /* Normal Codec */ dai_props[i].codecs = dai_link[i].codecs = dlcs; dai_props[i].num.codecs = dai_link[i].num_codecs = li->num[i].codecs; dai_props[i].codec_dai = dais; dlcs += li->num[i].codecs; dais += li->num[i].codecs; if (!li->num[i].cpus) { /* DPCM Be's Codec */ dai_props[i].codec_conf = cconf; cconf += li->num[i].codecs; } } else { /* DPCM Fe's Codec = dummy */ dai_props[i].codecs = dai_link[i].codecs = &priv->dummy; dai_props[i].num.codecs = dai_link[i].num_codecs = 1; } if (li->num[i].platforms) { /* Have Platform */ dai_props[i].platforms = dai_link[i].platforms = dlcs; dai_props[i].num.platforms = dai_link[i].num_platforms = li->num[i].platforms; dlcs += li->num[i].platforms; } else { /* Doesn't have Platform */ dai_props[i].platforms = dai_link[i].platforms = NULL; dai_props[i].num.platforms = dai_link[i].num_platforms = 0; } } return 0; } EXPORT_SYMBOL_GPL(asoc_simple_init_priv); int asoc_simple_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); return asoc_simple_clean_reference(card); } EXPORT_SYMBOL_GPL(asoc_simple_remove); int asoc_graph_card_probe(struct snd_soc_card *card) { struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card); int ret; ret = asoc_simple_init_hp(card, &priv->hp_jack, NULL); if (ret < 0) return ret; ret = asoc_simple_init_mic(card, &priv->mic_jack, NULL); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL_GPL(asoc_graph_card_probe); /* Module information */ MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); MODULE_DESCRIPTION("ALSA SoC Simple Card Utils"); MODULE_LICENSE("GPL v2");