/* * Renesas Sampling Rate Convert Sound Card for DPCM * * Copyright (C) 2015 Renesas Solutions Corp. * Kuninori Morimoto * * based on ${LINUX}/sound/soc/generic/simple-card.c * * 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 struct rsrc_card_of_data { const char *prefix; const struct snd_soc_dapm_route *routes; int num_routes; }; static const struct snd_soc_dapm_route routes_ssi0_ak4642[] = { {"ak4642 Playback", NULL, "DAI0 Playback"}, {"DAI0 Capture", NULL, "ak4642 Capture"}, }; static const struct rsrc_card_of_data routes_of_ssi0_ak4642 = { .prefix = "ak4642", .routes = routes_ssi0_ak4642, .num_routes = ARRAY_SIZE(routes_ssi0_ak4642), }; static const struct of_device_id rsrc_card_of_match[] = { { .compatible = "renesas,rsrc-card,lager", .data = &routes_of_ssi0_ak4642 }, { .compatible = "renesas,rsrc-card,koelsch", .data = &routes_of_ssi0_ak4642 }, { .compatible = "renesas,rsrc-card", }, {}, }; MODULE_DEVICE_TABLE(of, rsrc_card_of_match); #define DAI_NAME_NUM 32 struct rsrc_card_dai { unsigned int sysclk; unsigned int tx_slot_mask; unsigned int rx_slot_mask; int slots; int slot_width; struct clk *clk; char dai_name[DAI_NAME_NUM]; }; #define IDX_CPU 0 #define IDX_CODEC 1 struct rsrc_card_priv { struct snd_soc_card snd_card; struct snd_soc_codec_conf codec_conf; struct rsrc_card_dai *dai_props; struct snd_soc_dai_link *dai_link; int dai_num; u32 convert_rate; }; #define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev) #define rsrc_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i)) #define rsrc_priv_to_props(priv, i) ((priv)->dai_props + (i)) #define rsrc_dev_to_of_data(dev) (of_match_device(rsrc_card_of_match, (dev))->data) static int rsrc_card_startup(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, rtd - rtd->card->rtd); return clk_prepare_enable(dai_props->clk); } static void rsrc_card_shutdown(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, rtd - rtd->card->rtd); clk_disable_unprepare(dai_props->clk); } static struct snd_soc_ops rsrc_card_ops = { .startup = rsrc_card_startup, .shutdown = rsrc_card_shutdown, }; static int rsrc_card_dai_init(struct snd_soc_pcm_runtime *rtd) { struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct snd_soc_dai *dai; struct snd_soc_dai_link *dai_link; struct rsrc_card_dai *dai_props; int num = rtd - rtd->card->rtd; int ret; dai_link = rsrc_priv_to_link(priv, num); dai_props = rsrc_priv_to_props(priv, num); dai = dai_link->dynamic ? rtd->cpu_dai : rtd->codec_dai; if (dai_props->sysclk) { ret = snd_soc_dai_set_sysclk(dai, 0, dai_props->sysclk, 0); if (ret && ret != -ENOTSUPP) { dev_err(dai->dev, "set_sysclk error\n"); goto err; } } if (dai_props->slots) { ret = snd_soc_dai_set_tdm_slot(dai, dai_props->tx_slot_mask, dai_props->rx_slot_mask, dai_props->slots, dai_props->slot_width); if (ret && ret != -ENOTSUPP) { dev_err(dai->dev, "set_tdm_slot error\n"); goto err; } } ret = 0; err: return ret; } static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params) { struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card); struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); if (!priv->convert_rate) return 0; rate->min = rate->max = priv->convert_rate; return 0; } static int rsrc_card_parse_daifmt(struct device_node *node, struct device_node *codec, struct rsrc_card_priv *priv, struct snd_soc_dai_link *dai_link, unsigned int *retfmt) { struct device_node *bitclkmaster = NULL; struct device_node *framemaster = NULL; unsigned int daifmt; daifmt = snd_soc_of_parse_daifmt(node, NULL, &bitclkmaster, &framemaster); daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK; if (!bitclkmaster && !framemaster) return -EINVAL; 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; } static int rsrc_card_parse_links(struct device_node *np, struct rsrc_card_priv *priv, int idx, bool is_fe) { struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx); struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx); struct of_phandle_args args; 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; /* Parse TDM slot */ ret = snd_soc_of_parse_tdm_slot(np, &dai_props->tx_slot_mask, &dai_props->rx_slot_mask, &dai_props->slots, &dai_props->slot_width); if (ret) return ret; if (is_fe) { /* BE is dummy */ dai_link->codec_of_node = NULL; dai_link->codec_dai_name = "snd-soc-dummy-dai"; dai_link->codec_name = "snd-soc-dummy"; /* FE settings */ dai_link->dynamic = 1; dai_link->dpcm_merged_format = 1; dai_link->cpu_of_node = args.np; ret = snd_soc_of_get_dai_name(np, &dai_link->cpu_dai_name); if (ret < 0) return ret; /* set dai_name */ snprintf(dai_props->dai_name, DAI_NAME_NUM, "fe.%s", dai_link->cpu_dai_name); /* * 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 (!args.args_count) dai_link->cpu_dai_name = NULL; } else { struct device *dev = rsrc_priv_to_dev(priv); const struct rsrc_card_of_data *of_data; of_data = rsrc_dev_to_of_data(dev); /* FE is dummy */ dai_link->cpu_of_node = NULL; dai_link->cpu_dai_name = "snd-soc-dummy-dai"; dai_link->cpu_name = "snd-soc-dummy"; /* BE settings */ dai_link->no_pcm = 1; dai_link->be_hw_params_fixup = rsrc_card_be_hw_params_fixup; dai_link->codec_of_node = args.np; ret = snd_soc_of_get_dai_name(np, &dai_link->codec_dai_name); if (ret < 0) return ret; /* additional name prefix */ if (of_data) { priv->codec_conf.of_node = dai_link->codec_of_node; priv->codec_conf.name_prefix = of_data->prefix; } else { snd_soc_of_parse_audio_prefix(&priv->snd_card, &priv->codec_conf, dai_link->codec_of_node, "audio-prefix"); } /* set dai_name */ snprintf(dai_props->dai_name, DAI_NAME_NUM, "be.%s", dai_link->codec_dai_name); } /* Simple Card assumes platform == cpu */ dai_link->platform_of_node = dai_link->cpu_of_node; dai_link->dpcm_playback = 1; dai_link->dpcm_capture = 1; dai_link->name = dai_props->dai_name; dai_link->stream_name = dai_props->dai_name; dai_link->ops = &rsrc_card_ops; dai_link->init = rsrc_card_dai_init; return 0; } static int rsrc_card_parse_clk(struct device_node *np, struct rsrc_card_priv *priv, int idx, bool is_fe) { struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx); struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx); struct clk *clk; struct device_node *of_np = is_fe ? dai_link->cpu_of_node : dai_link->codec_of_node; u32 val; /* * 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)) return PTR_ERR(clk); dai_props->sysclk = clk_get_rate(clk); dai_props->clk = clk; } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) { dai_props->sysclk = val; } else { clk = of_clk_get(of_np, 0); if (!IS_ERR(clk)) dai_props->sysclk = clk_get_rate(clk); } return 0; } static int rsrc_card_dai_sub_link_of(struct device_node *node, struct device_node *np, struct rsrc_card_priv *priv, int idx, bool is_fe) { struct device *dev = rsrc_priv_to_dev(priv); struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx); struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx); int ret; ret = rsrc_card_parse_links(np, priv, idx, is_fe); if (ret < 0) return ret; ret = rsrc_card_parse_clk(np, priv, idx, is_fe); if (ret < 0) return ret; dev_dbg(dev, "\t%s / %04x / %d\n", dai_props->dai_name, dai_link->dai_fmt, dai_props->sysclk); return ret; } static int rsrc_card_dai_link_of(struct device_node *node, struct rsrc_card_priv *priv) { struct snd_soc_dai_link *dai_link; struct device_node *np; unsigned int daifmt = 0; int ret, i; bool is_fe; /* find 1st codec */ i = 0; for_each_child_of_node(node, np) { dai_link = rsrc_priv_to_link(priv, i); if (strcmp(np->name, "codec") == 0) { ret = rsrc_card_parse_daifmt(node, np, priv, dai_link, &daifmt); if (ret < 0) return ret; break; } i++; } i = 0; for_each_child_of_node(node, np) { dai_link = rsrc_priv_to_link(priv, i); dai_link->dai_fmt = daifmt; is_fe = false; if (strcmp(np->name, "cpu") == 0) is_fe = true; ret = rsrc_card_dai_sub_link_of(node, np, priv, i, is_fe); if (ret < 0) return ret; i++; } return 0; } static int rsrc_card_parse_of(struct device_node *node, struct rsrc_card_priv *priv, struct device *dev) { const struct rsrc_card_of_data *of_data = rsrc_dev_to_of_data(dev); struct rsrc_card_dai *props; struct snd_soc_dai_link *links; int ret; int num; if (!node) return -EINVAL; num = of_get_child_count(node); props = devm_kzalloc(dev, sizeof(*props) * num, GFP_KERNEL); links = devm_kzalloc(dev, sizeof(*links) * num, GFP_KERNEL); if (!props || !links) return -ENOMEM; priv->dai_props = props; priv->dai_link = links; priv->dai_num = num; /* Init snd_soc_card */ priv->snd_card.owner = THIS_MODULE; priv->snd_card.dev = dev; priv->snd_card.dai_link = priv->dai_link; priv->snd_card.num_links = num; priv->snd_card.codec_conf = &priv->codec_conf; priv->snd_card.num_configs = 1; if (of_data) { priv->snd_card.of_dapm_routes = of_data->routes; priv->snd_card.num_of_dapm_routes = of_data->num_routes; } else { snd_soc_of_parse_audio_routing(&priv->snd_card, "audio-routing"); } /* Parse the card name from DT */ snd_soc_of_parse_card_name(&priv->snd_card, "card-name"); /* sampling rate convert */ of_property_read_u32(node, "convert-rate", &priv->convert_rate); dev_dbg(dev, "New rsrc-audio-card: %s (%d)\n", priv->snd_card.name ? priv->snd_card.name : "", priv->convert_rate); ret = rsrc_card_dai_link_of(node, priv); if (ret < 0) return ret; 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 rsrc_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 rsrc_card_probe(struct platform_device *pdev) { struct rsrc_card_priv *priv; struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; int ret; /* Allocate the private data */ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; ret = rsrc_card_parse_of(np, priv, dev); if (ret < 0) { if (ret != -EPROBE_DEFER) dev_err(dev, "parse error %d\n", ret); goto err; } 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: rsrc_card_unref(&priv->snd_card); return ret; } static int rsrc_card_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); return rsrc_card_unref(card); } static struct platform_driver rsrc_card = { .driver = { .name = "renesas-src-audio-card", .of_match_table = rsrc_card_of_match, }, .probe = rsrc_card_probe, .remove = rsrc_card_remove, }; module_platform_driver(rsrc_card); MODULE_ALIAS("platform:renesas-src-audio-card"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Renesas Sampling Rate Convert Sound Card"); MODULE_AUTHOR("Kuninori Morimoto ");