| 1 | /* |
| 2 | * simple-card-core.c |
| 3 | * |
| 4 | * Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/of.h> |
| 12 | #include <sound/simple_card_utils.h> |
| 13 | |
| 14 | int asoc_simple_card_parse_daifmt(struct device *dev, |
| 15 | struct device_node *node, |
| 16 | struct device_node *codec, |
| 17 | char *prefix, |
| 18 | unsigned int *retfmt) |
| 19 | { |
| 20 | struct device_node *bitclkmaster = NULL; |
| 21 | struct device_node *framemaster = NULL; |
| 22 | int prefix_len = prefix ? strlen(prefix) : 0; |
| 23 | unsigned int daifmt; |
| 24 | |
| 25 | daifmt = snd_soc_of_parse_daifmt(node, prefix, |
| 26 | &bitclkmaster, &framemaster); |
| 27 | daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK; |
| 28 | |
| 29 | if (prefix_len && !bitclkmaster && !framemaster) { |
| 30 | /* |
| 31 | * No dai-link level and master setting was not found from |
| 32 | * sound node level, revert back to legacy DT parsing and |
| 33 | * take the settings from codec node. |
| 34 | */ |
| 35 | dev_dbg(dev, "Revert to legacy daifmt parsing\n"); |
| 36 | |
| 37 | daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) | |
| 38 | (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK); |
| 39 | } else { |
| 40 | if (codec == bitclkmaster) |
| 41 | daifmt |= (codec == framemaster) ? |
| 42 | SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS; |
| 43 | else |
| 44 | daifmt |= (codec == framemaster) ? |
| 45 | SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS; |
| 46 | } |
| 47 | |
| 48 | of_node_put(bitclkmaster); |
| 49 | of_node_put(framemaster); |
| 50 | |
| 51 | *retfmt = daifmt; |
| 52 | |
| 53 | return 0; |
| 54 | } |
| 55 | EXPORT_SYMBOL_GPL(asoc_simple_card_parse_daifmt); |
| 56 | |
| 57 | int asoc_simple_card_set_dailink_name(struct device *dev, |
| 58 | struct snd_soc_dai_link *dai_link, |
| 59 | const char *fmt, ...) |
| 60 | { |
| 61 | va_list ap; |
| 62 | char *name = NULL; |
| 63 | int ret = -ENOMEM; |
| 64 | |
| 65 | va_start(ap, fmt); |
| 66 | name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap); |
| 67 | va_end(ap); |
| 68 | |
| 69 | if (name) { |
| 70 | ret = 0; |
| 71 | |
| 72 | dai_link->name = name; |
| 73 | dai_link->stream_name = name; |
| 74 | } |
| 75 | |
| 76 | return ret; |
| 77 | } |
| 78 | EXPORT_SYMBOL_GPL(asoc_simple_card_set_dailink_name); |
| 79 | |
| 80 | int asoc_simple_card_parse_card_name(struct snd_soc_card *card, |
| 81 | char *prefix) |
| 82 | { |
| 83 | char prop[128]; |
| 84 | int ret; |
| 85 | |
| 86 | snprintf(prop, sizeof(prop), "%sname", prefix); |
| 87 | |
| 88 | /* Parse the card name from DT */ |
| 89 | ret = snd_soc_of_parse_card_name(card, prop); |
| 90 | if (ret < 0) |
| 91 | return ret; |
| 92 | |
| 93 | if (!card->name && card->dai_link) |
| 94 | card->name = card->dai_link->name; |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | EXPORT_SYMBOL_GPL(asoc_simple_card_parse_card_name); |
| 99 | |
| 100 | /* Module information */ |
| 101 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); |
| 102 | MODULE_DESCRIPTION("ALSA SoC Simple Card Utils"); |
| 103 | MODULE_LICENSE("GPL v2"); |