diff options
Diffstat (limited to 'sound/soc/generic/simple-card-utils.c')
| -rw-r--r-- | sound/soc/generic/simple-card-utils.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c index d89a9a1b2471..1cb39309f5d5 100644 --- a/sound/soc/generic/simple-card-utils.c +++ b/sound/soc/generic/simple-card-utils.c @@ -7,6 +7,8 @@ * 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/module.h> #include <linux/of.h> #include <sound/simple_card_utils.h> @@ -95,3 +97,148 @@ int asoc_simple_card_parse_card_name(struct snd_soc_card *card, return 0; } EXPORT_SYMBOL_GPL(asoc_simple_card_parse_card_name); + +int asoc_simple_card_parse_clk(struct device_node *node, + struct device_node *dai_of_node, + struct asoc_simple_dai *simple_dai) +{ + 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 = of_clk_get(node, 0); + 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 = of_clk_get(dai_of_node, 0); + if (!IS_ERR(clk)) + simple_dai->sysclk = clk_get_rate(clk); + } + + return 0; +} +EXPORT_SYMBOL_GPL(asoc_simple_card_parse_clk); + +int asoc_simple_card_parse_dai(struct device_node *node, + struct device_node **dai_of_node, + const char **dai_name, + const char *list_name, + const char *cells_name, + int *is_single_link) +{ + struct of_phandle_args args; + int ret; + + if (!node) + return 0; + + /* + * 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(node, list_name, cells_name, 0, &args); + if (ret) + return ret; + + /* Get dai->name */ + if (dai_name) { + ret = snd_soc_of_get_dai_name(node, dai_name); + if (ret < 0) + return ret; + } + + *dai_of_node = args.np; + + if (is_single_link) + *is_single_link = !args.args_count; + + return 0; +} +EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai); + +int asoc_simple_card_init_dai(struct snd_soc_dai *dai, + struct asoc_simple_dai *simple_dai) +{ + int ret; + + if (simple_dai->sysclk) { + ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk, 0); + 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; +} +EXPORT_SYMBOL_GPL(asoc_simple_card_init_dai); + +int asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link) +{ + if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) + return -EINVAL; + + /* Assumes platform == cpu */ + if (!dai_link->platform_of_node) + dai_link->platform_of_node = dai_link->cpu_of_node; + + return 0; +} +EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_dailink); + +void asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link *dai_link, + 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) + dai_link->cpu_dai_name = NULL; +} +EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_cpu); + +int asoc_simple_card_clean_reference(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; +} +EXPORT_SYMBOL_GPL(asoc_simple_card_clean_reference); + +/* Module information */ +MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); +MODULE_DESCRIPTION("ALSA SoC Simple Card Utils"); +MODULE_LICENSE("GPL v2"); |