4 * Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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.
10 #include <linux/clk.h>
11 #include <linux/module.h>
13 #include <linux/of_graph.h>
14 #include <sound/simple_card_utils.h>
16 void asoc_simple_card_convert_fixup(struct asoc_simple_card_data *data,
17 struct snd_pcm_hw_params *params)
19 struct snd_interval *rate = hw_param_interval(params,
20 SNDRV_PCM_HW_PARAM_RATE);
21 struct snd_interval *channels = hw_param_interval(params,
22 SNDRV_PCM_HW_PARAM_CHANNELS);
24 if (data->convert_rate)
26 rate->max = data->convert_rate;
28 if (data->convert_channels)
30 channels->max = data->convert_channels;
32 EXPORT_SYMBOL_GPL(asoc_simple_card_convert_fixup);
34 void asoc_simple_card_parse_convert(struct device *dev, char *prefix,
35 struct asoc_simple_card_data *data)
37 struct device_node *np = dev->of_node;
43 /* sampling rate convert */
44 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
45 of_property_read_u32(np, prop, &data->convert_rate);
47 /* channels transfer */
48 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
49 of_property_read_u32(np, prop, &data->convert_channels);
51 dev_dbg(dev, "convert_rate %d\n", data->convert_rate);
52 dev_dbg(dev, "convert_channels %d\n", data->convert_channels);
54 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_convert);
56 int asoc_simple_card_parse_daifmt(struct device *dev,
57 struct device_node *node,
58 struct device_node *codec,
62 struct device_node *bitclkmaster = NULL;
63 struct device_node *framemaster = NULL;
66 daifmt = snd_soc_of_parse_daifmt(node, prefix,
67 &bitclkmaster, &framemaster);
68 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
70 if (!bitclkmaster && !framemaster) {
72 * No dai-link level and master setting was not found from
73 * sound node level, revert back to legacy DT parsing and
74 * take the settings from codec node.
76 dev_dbg(dev, "Revert to legacy daifmt parsing\n");
78 daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
79 (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
81 if (codec == bitclkmaster)
82 daifmt |= (codec == framemaster) ?
83 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
85 daifmt |= (codec == framemaster) ?
86 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
89 of_node_put(bitclkmaster);
90 of_node_put(framemaster);
94 dev_dbg(dev, "format : %04x\n", daifmt);
98 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_daifmt);
100 int asoc_simple_card_set_dailink_name(struct device *dev,
101 struct snd_soc_dai_link *dai_link,
102 const char *fmt, ...)
109 name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
115 dai_link->name = name;
116 dai_link->stream_name = name;
118 dev_dbg(dev, "name : %s\n", name);
123 EXPORT_SYMBOL_GPL(asoc_simple_card_set_dailink_name);
125 int asoc_simple_card_parse_card_name(struct snd_soc_card *card,
133 /* Parse the card name from DT */
134 ret = snd_soc_of_parse_card_name(card, "label");
135 if (ret < 0 || !card->name) {
138 snprintf(prop, sizeof(prop), "%sname", prefix);
139 ret = snd_soc_of_parse_card_name(card, prop);
144 if (!card->name && card->dai_link)
145 card->name = card->dai_link->name;
147 dev_dbg(card->dev, "Card Name: %s\n", card->name ? card->name : "");
151 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_card_name);
153 static void asoc_simple_card_clk_register(struct asoc_simple_dai *dai,
159 int asoc_simple_card_clk_enable(struct asoc_simple_dai *dai)
161 return clk_prepare_enable(dai->clk);
163 EXPORT_SYMBOL_GPL(asoc_simple_card_clk_enable);
165 void asoc_simple_card_clk_disable(struct asoc_simple_dai *dai)
167 clk_disable_unprepare(dai->clk);
169 EXPORT_SYMBOL_GPL(asoc_simple_card_clk_disable);
171 int asoc_simple_card_parse_clk(struct device *dev,
172 struct device_node *node,
173 struct device_node *dai_of_node,
174 struct asoc_simple_dai *simple_dai,
181 * Parse dai->sysclk come from "clocks = <&xxx>"
182 * (if system has common clock)
183 * or "system-clock-frequency = <xxx>"
184 * or device's module clock.
186 clk = devm_get_clk_from_child(dev, node, NULL);
188 simple_dai->sysclk = clk_get_rate(clk);
190 asoc_simple_card_clk_register(simple_dai, clk);
191 } else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
192 simple_dai->sysclk = val;
194 clk = devm_get_clk_from_child(dev, dai_of_node, NULL);
196 simple_dai->sysclk = clk_get_rate(clk);
199 dev_dbg(dev, "%s : sysclk = %d\n", name, simple_dai->sysclk);
203 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_clk);
205 int asoc_simple_card_parse_dai(struct device_node *node,
206 struct device_node **dai_of_node,
207 const char **dai_name,
208 const char *list_name,
209 const char *cells_name,
212 struct of_phandle_args args;
219 * Get node via "sound-dai = <&phandle port>"
220 * it will be used as xxx_of_node on soc_bind_dai_link()
222 ret = of_parse_phandle_with_args(node, list_name, cells_name, 0, &args);
228 ret = snd_soc_of_get_dai_name(node, dai_name);
233 *dai_of_node = args.np;
236 *is_single_link = !args.args_count;
240 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai);
242 static int asoc_simple_card_get_dai_id(struct device_node *ep)
244 struct device_node *node;
245 struct device_node *endpoint;
249 ret = snd_soc_get_dai_id(ep);
250 if (ret != -ENOTSUPP)
253 node = of_graph_get_port_parent(ep);
256 * Non HDMI sound case, counting port/endpoint on its DT
257 * is enough. Let's count it.
261 for_each_endpoint_of_node(node, endpoint) {
272 int asoc_simple_card_parse_graph_dai(struct device_node *ep,
273 struct device_node **dai_of_node,
274 const char **dai_name)
276 struct device_node *node;
277 struct of_phandle_args args;
286 * of_graph_get_port_parent() will call
287 * of_node_put(). So, call of_node_get() here
290 node = of_graph_get_port_parent(ep);
294 args.args[0] = asoc_simple_card_get_dai_id(ep);
295 args.args_count = (of_graph_get_endpoint_count(node) > 1);
297 ret = snd_soc_get_dai_name(&args, dai_name);
305 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_graph_dai);
307 int asoc_simple_card_init_dai(struct snd_soc_dai *dai,
308 struct asoc_simple_dai *simple_dai)
312 if (simple_dai->sysclk) {
313 ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk, 0);
314 if (ret && ret != -ENOTSUPP) {
315 dev_err(dai->dev, "simple-card: set_sysclk error\n");
320 if (simple_dai->slots) {
321 ret = snd_soc_dai_set_tdm_slot(dai,
322 simple_dai->tx_slot_mask,
323 simple_dai->rx_slot_mask,
325 simple_dai->slot_width);
326 if (ret && ret != -ENOTSUPP) {
327 dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
334 EXPORT_SYMBOL_GPL(asoc_simple_card_init_dai);
336 int asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link)
338 /* Assumes platform == cpu */
339 if (!dai_link->platform_of_node)
340 dai_link->platform_of_node = dai_link->cpu_of_node;
344 EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_dailink);
346 void asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
350 * In soc_bind_dai_link() will check cpu name after
351 * of_node matching if dai_link has cpu_dai_name.
352 * but, it will never match if name was created by
353 * fmt_single_name() remove cpu_dai_name if cpu_args
356 * fmt_multiple_name()
359 dai_link->cpu_dai_name = NULL;
361 EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_cpu);
363 int asoc_simple_card_clean_reference(struct snd_soc_card *card)
365 struct snd_soc_dai_link *dai_link;
368 for (num_links = 0, dai_link = card->dai_link;
369 num_links < card->num_links;
370 num_links++, dai_link++) {
371 of_node_put(dai_link->cpu_of_node);
372 of_node_put(dai_link->codec_of_node);
376 EXPORT_SYMBOL_GPL(asoc_simple_card_clean_reference);
378 int asoc_simple_card_of_parse_routing(struct snd_soc_card *card,
382 struct device_node *node = card->dev->of_node;
388 snprintf(prop, sizeof(prop), "%s%s", prefix, "routing");
390 if (!of_property_read_bool(node, prop)) {
396 return snd_soc_of_parse_audio_routing(card, prop);
398 EXPORT_SYMBOL_GPL(asoc_simple_card_of_parse_routing);
400 int asoc_simple_card_of_parse_widgets(struct snd_soc_card *card,
403 struct device_node *node = card->dev->of_node;
409 snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets");
411 if (of_property_read_bool(node, prop))
412 return snd_soc_of_parse_audio_simple_widgets(card, prop);
414 /* no widgets is not error */
417 EXPORT_SYMBOL_GPL(asoc_simple_card_of_parse_widgets);
419 /* Module information */
420 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
421 MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
422 MODULE_LICENSE("GPL v2");