diff options
Diffstat (limited to 'sound/soc/generic/simple-card.c')
| -rw-r--r-- | sound/soc/generic/simple-card.c | 622 |
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>"); |