summaryrefslogtreecommitdiffstats
path: root/sound/soc/generic/simple-scu-card.c
blob: b8d8437ef3dd9071b26010ac974bec178056e6f8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
/*
 * ASoC simple SCU sound card support
 *
 * Copyright (C) 2015 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * 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 <linux/clk.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/jack.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/simple_card_utils.h>

struct asoc_simple_card_priv {
	struct snd_soc_card snd_card;
	struct snd_soc_codec_conf codec_conf;
	struct asoc_simple_dai *dai_props;
	struct snd_soc_dai_link *dai_link;
	u32 convert_rate;
	u32 convert_channels;
};

#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))

#define DAI	"sound-dai"
#define CELL	"#sound-dai-cells"
#define PREFIX	"simple-audio-card,"

static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct asoc_simple_card_priv *priv =	snd_soc_card_get_drvdata(rtd->card);
	struct asoc_simple_dai *dai_props =
		simple_priv_to_props(priv, rtd->num);

	return clk_prepare_enable(dai_props->clk);
}

static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct asoc_simple_card_priv *priv =	snd_soc_card_get_drvdata(rtd->card);
	struct asoc_simple_dai *dai_props =
		simple_priv_to_props(priv, rtd->num);

	clk_disable_unprepare(dai_props->clk);
}

static struct snd_soc_ops asoc_simple_card_ops = {
	.startup = asoc_simple_card_startup,
	.shutdown = asoc_simple_card_shutdown,
};

static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
{
	struct asoc_simple_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct snd_soc_dai *dai;
	struct snd_soc_dai_link *dai_link;
	struct asoc_simple_dai *dai_props;
	int num = rtd->num;

	dai_link	= simple_priv_to_link(priv, num);
	dai_props	= simple_priv_to_props(priv, num);
	dai		= dai_link->dynamic ?
				rtd->cpu_dai :
				rtd->codec_dai;

	return asoc_simple_card_init_dai(dai, dai_props);
}

static int asoc_simple_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
					struct snd_pcm_hw_params *params)
{
	struct asoc_simple_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct snd_interval *rate = hw_param_interval(params,
						      SNDRV_PCM_HW_PARAM_RATE);
	struct snd_interval *channels = hw_param_interval(params,
						SNDRV_PCM_HW_PARAM_CHANNELS);

	if (priv->convert_rate)
		rate->min =
		rate->max = priv->convert_rate;

	if (priv->convert_channels)
		channels->min =
		channels->max = priv->convert_channels;

	return 0;
}

static int asoc_simple_card_dai_link_of(struct device_node *np,
					struct asoc_simple_card_priv *priv,
					unsigned int daifmt,
					int idx, bool is_fe)
{
	struct device *dev = simple_priv_to_dev(priv);
	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
	struct asoc_simple_dai *dai_props = simple_priv_to_props(priv, idx);
	int ret;

	if (is_fe) {
		int is_single_links = 0;

		/* 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;

		ret = asoc_simple_card_parse_cpu(np, dai_link, DAI, CELL,
						 &is_single_links);
		if (ret)
			return ret;

		ret = asoc_simple_card_parse_clk_cpu(np, dai_link, dai_props);
		if (ret < 0)
			return ret;

		ret = asoc_simple_card_set_dailink_name(dev, dai_link,
							"fe.%s",
							dai_link->cpu_dai_name);
		if (ret < 0)
			return ret;

		asoc_simple_card_canonicalize_cpu(dai_link, is_single_links);
	} else {
		/* 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	= asoc_simple_card_be_hw_params_fixup;

		ret = asoc_simple_card_parse_codec(np, dai_link, DAI, CELL);
		if (ret < 0)
			return ret;

		ret = asoc_simple_card_parse_clk_codec(np, dai_link, dai_props);
		if (ret < 0)
			return ret;

		ret = asoc_simple_card_set_dailink_name(dev, dai_link,
							"be.%s",
							dai_link->codec_dai_name);
		if (ret < 0)
			return ret;

		snd_soc_of_parse_audio_prefix(&priv->snd_card,
					      &priv->codec_conf,
					      dai_link->codec_of_node,
					      PREFIX "prefix");
	}

	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;

	ret = asoc_simple_card_canonicalize_dailink(dai_link);
	if (ret < 0)
		return ret;

	dai_link->dai_fmt		= daifmt;
	dai_link->dpcm_playback		= 1;
	dai_link->dpcm_capture		= 1;
	dai_link->ops			= &asoc_simple_card_ops;
	dai_link->init			= asoc_simple_card_dai_init;

	dev_dbg(dev, "\t%s / %04x / %d\n",
		dai_link->name,
		dai_link->dai_fmt,
		dai_props->sysclk);

	return 0;
}

static int asoc_simple_card_parse_of(struct device_node *node,
				     struct asoc_simple_card_priv *priv)

{
	struct device *dev = simple_priv_to_dev(priv);
	struct device_node *np;
	unsigned int daifmt = 0;
	bool is_fe;
	int ret, i;

	if (!node)
		return -EINVAL;

	ret = snd_soc_of_parse_audio_routing(&priv->snd_card, PREFIX "routing");
	if (ret < 0)
		return ret;

	/* sampling rate convert */
	of_property_read_u32(node, PREFIX "convert-rate", &priv->convert_rate);

	/* channels transfer */
	of_property_read_u32(node, PREFIX "convert-channels", &priv->convert_channels);

	/* find 1st codec */
	np = of_get_child_by_name(node, PREFIX "codec");
	if (!np)
		return -ENODEV;

	ret = asoc_simple_card_parse_daifmt(dev, node, np, PREFIX, &daifmt);
	if (ret < 0)
		return ret;

	i = 0;
	for_each_child_of_node(node, np) {
		is_fe = false;
		if (strcmp(np->name, PREFIX "cpu") == 0)
			is_fe = true;

		ret = asoc_simple_card_dai_link_of(np, priv, daifmt, i, is_fe);
		if (ret < 0)
			return ret;
		i++;
	}

	ret = asoc_simple_card_parse_card_name(&priv->snd_card, PREFIX);
	if (ret < 0)
		return ret;

	dev_dbg(dev, "New card: %s\n",
		priv->snd_card.name ? priv->snd_card.name : "");
	dev_dbg(dev, "convert_rate     %d\n", priv->convert_rate);
	dev_dbg(dev, "convert_channels %d\n", priv->convert_channels);

	return 0;
}

static int asoc_simple_card_probe(struct platform_device *pdev)
{
	struct asoc_simple_card_priv *priv;
	struct snd_soc_dai_link *links;
	struct asoc_simple_dai *props;
	struct device *dev = &pdev->dev;
	struct device_node *np = pdev->dev.of_node;
	int num, ret;

	/* Allocate the private data */
	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	num = of_get_child_count(np);

	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;

	/* 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;

	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;
	}

	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_clean_reference(&priv->snd_card);

	return ret;
}

static int asoc_simple_card_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	return asoc_simple_card_clean_reference(card);
}

static const struct of_device_id asoc_simple_of_match[] = {
	{ .compatible = "renesas,rsrc-card", },
	{ .compatible = "simple-scu-audio-card", },
	{},
};
MODULE_DEVICE_TABLE(of, asoc_simple_of_match);

static struct platform_driver asoc_simple_card = {
	.driver = {
		.name = "simple-scu-audio-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-scu-card");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ASoC Simple SCU Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");