2 * Renesas Sampling Rate Convert Sound Card for DPCM
4 * Copyright (C) 2015 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 * based on ${LINUX}/sound/soc/generic/simple-card.c
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 #include <linux/clk.h>
14 #include <linux/device.h>
15 #include <linux/module.h>
17 #include <linux/of_device.h>
18 #include <linux/platform_device.h>
19 #include <linux/string.h>
20 #include <sound/jack.h>
21 #include <sound/soc.h>
22 #include <sound/soc-dai.h>
23 #include <sound/simple_card_utils.h>
25 struct rsrc_card_of_data
{
27 const struct snd_soc_dapm_route
*routes
;
31 static const struct snd_soc_dapm_route routes_ssi0_ak4642
[] = {
32 {"ak4642 Playback", NULL
, "DAI0 Playback"},
33 {"DAI0 Capture", NULL
, "ak4642 Capture"},
36 static const struct rsrc_card_of_data routes_of_ssi0_ak4642
= {
38 .routes
= routes_ssi0_ak4642
,
39 .num_routes
= ARRAY_SIZE(routes_ssi0_ak4642
),
42 static const struct of_device_id rsrc_card_of_match
[] = {
43 { .compatible
= "renesas,rsrc-card,lager", .data
= &routes_of_ssi0_ak4642
},
44 { .compatible
= "renesas,rsrc-card,koelsch", .data
= &routes_of_ssi0_ak4642
},
45 { .compatible
= "renesas,rsrc-card", },
48 MODULE_DEVICE_TABLE(of
, rsrc_card_of_match
);
52 struct rsrc_card_priv
{
53 struct snd_soc_card snd_card
;
54 struct snd_soc_codec_conf codec_conf
;
55 struct asoc_simple_dai
*dai_props
;
56 struct snd_soc_dai_link
*dai_link
;
61 #define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev)
62 #define rsrc_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
63 #define rsrc_priv_to_props(priv, i) ((priv)->dai_props + (i))
65 static int rsrc_card_startup(struct snd_pcm_substream
*substream
)
67 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
68 struct rsrc_card_priv
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
69 struct asoc_simple_dai
*dai_props
=
70 rsrc_priv_to_props(priv
, rtd
->num
);
72 return clk_prepare_enable(dai_props
->clk
);
75 static void rsrc_card_shutdown(struct snd_pcm_substream
*substream
)
77 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
78 struct rsrc_card_priv
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
79 struct asoc_simple_dai
*dai_props
=
80 rsrc_priv_to_props(priv
, rtd
->num
);
82 clk_disable_unprepare(dai_props
->clk
);
85 static struct snd_soc_ops rsrc_card_ops
= {
86 .startup
= rsrc_card_startup
,
87 .shutdown
= rsrc_card_shutdown
,
90 static int rsrc_card_dai_init(struct snd_soc_pcm_runtime
*rtd
)
92 struct rsrc_card_priv
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
93 struct snd_soc_dai
*dai
;
94 struct snd_soc_dai_link
*dai_link
;
95 struct asoc_simple_dai
*dai_props
;
99 dai_link
= rsrc_priv_to_link(priv
, num
);
100 dai_props
= rsrc_priv_to_props(priv
, num
);
101 dai
= dai_link
->dynamic
?
105 if (dai_props
->sysclk
) {
106 ret
= snd_soc_dai_set_sysclk(dai
, 0, dai_props
->sysclk
, 0);
107 if (ret
&& ret
!= -ENOTSUPP
) {
108 dev_err(dai
->dev
, "set_sysclk error\n");
113 if (dai_props
->slots
) {
114 ret
= snd_soc_dai_set_tdm_slot(dai
,
115 dai_props
->tx_slot_mask
,
116 dai_props
->rx_slot_mask
,
118 dai_props
->slot_width
);
119 if (ret
&& ret
!= -ENOTSUPP
) {
120 dev_err(dai
->dev
, "set_tdm_slot error\n");
131 static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime
*rtd
,
132 struct snd_pcm_hw_params
*params
)
134 struct rsrc_card_priv
*priv
= snd_soc_card_get_drvdata(rtd
->card
);
135 struct snd_interval
*rate
= hw_param_interval(params
,
136 SNDRV_PCM_HW_PARAM_RATE
);
137 struct snd_interval
*channels
= hw_param_interval(params
,
138 SNDRV_PCM_HW_PARAM_CHANNELS
);
140 if (priv
->convert_rate
)
142 rate
->max
= priv
->convert_rate
;
144 if (priv
->convert_channels
)
146 channels
->max
= priv
->convert_channels
;
151 static int rsrc_card_parse_links(struct device_node
*np
,
152 struct rsrc_card_priv
*priv
,
155 struct device
*dev
= rsrc_priv_to_dev(priv
);
156 struct snd_soc_dai_link
*dai_link
= rsrc_priv_to_link(priv
, idx
);
157 struct asoc_simple_dai
*dai_props
= rsrc_priv_to_props(priv
, idx
);
158 struct of_phandle_args args
;
162 * Get node via "sound-dai = <&phandle port>"
163 * it will be used as xxx_of_node on soc_bind_dai_link()
165 ret
= of_parse_phandle_with_args(np
, "sound-dai",
166 "#sound-dai-cells", 0, &args
);
171 ret
= snd_soc_of_parse_tdm_slot(np
,
172 &dai_props
->tx_slot_mask
,
173 &dai_props
->rx_slot_mask
,
175 &dai_props
->slot_width
);
181 dai_link
->codec_of_node
= NULL
;
182 dai_link
->codec_dai_name
= "snd-soc-dummy-dai";
183 dai_link
->codec_name
= "snd-soc-dummy";
186 dai_link
->dynamic
= 1;
187 dai_link
->dpcm_merged_format
= 1;
188 dai_link
->cpu_of_node
= args
.np
;
189 ret
= snd_soc_of_get_dai_name(np
, &dai_link
->cpu_dai_name
);
193 ret
= asoc_simple_card_set_dailink_name(dev
, dai_link
,
195 dai_link
->cpu_dai_name
);
200 * In soc_bind_dai_link() will check cpu name after
201 * of_node matching if dai_link has cpu_dai_name.
202 * but, it will never match if name was created by
203 * fmt_single_name() remove cpu_dai_name if cpu_args
206 * fmt_multiple_name()
208 if (!args
.args_count
)
209 dai_link
->cpu_dai_name
= NULL
;
211 const struct rsrc_card_of_data
*of_data
;
213 of_data
= of_device_get_match_data(dev
);
216 dai_link
->cpu_of_node
= NULL
;
217 dai_link
->cpu_dai_name
= "snd-soc-dummy-dai";
218 dai_link
->cpu_name
= "snd-soc-dummy";
221 dai_link
->no_pcm
= 1;
222 dai_link
->be_hw_params_fixup
= rsrc_card_be_hw_params_fixup
;
223 dai_link
->codec_of_node
= args
.np
;
224 ret
= snd_soc_of_get_dai_name(np
, &dai_link
->codec_dai_name
);
228 ret
= asoc_simple_card_set_dailink_name(dev
, dai_link
,
230 dai_link
->codec_dai_name
);
234 /* additional name prefix */
236 priv
->codec_conf
.of_node
= dai_link
->codec_of_node
;
237 priv
->codec_conf
.name_prefix
= of_data
->prefix
;
239 snd_soc_of_parse_audio_prefix(&priv
->snd_card
,
241 dai_link
->codec_of_node
,
246 /* Simple Card assumes platform == cpu */
247 dai_link
->platform_of_node
= dai_link
->cpu_of_node
;
248 dai_link
->dpcm_playback
= 1;
249 dai_link
->dpcm_capture
= 1;
250 dai_link
->ops
= &rsrc_card_ops
;
251 dai_link
->init
= rsrc_card_dai_init
;
256 static int rsrc_card_parse_clk(struct device_node
*np
,
257 struct rsrc_card_priv
*priv
,
260 struct snd_soc_dai_link
*dai_link
= rsrc_priv_to_link(priv
, idx
);
261 struct asoc_simple_dai
*dai_props
= rsrc_priv_to_props(priv
, idx
);
263 struct device_node
*of_np
= is_fe
? dai_link
->cpu_of_node
:
264 dai_link
->codec_of_node
;
268 * Parse dai->sysclk come from "clocks = <&xxx>"
269 * (if system has common clock)
270 * or "system-clock-frequency = <xxx>"
271 * or device's module clock.
273 if (of_property_read_bool(np
, "clocks")) {
274 clk
= of_clk_get(np
, 0);
278 dai_props
->sysclk
= clk_get_rate(clk
);
279 dai_props
->clk
= clk
;
280 } else if (!of_property_read_u32(np
, "system-clock-frequency", &val
)) {
281 dai_props
->sysclk
= val
;
283 clk
= of_clk_get(of_np
, 0);
285 dai_props
->sysclk
= clk_get_rate(clk
);
291 static int rsrc_card_dai_sub_link_of(struct device_node
*node
,
292 struct device_node
*np
,
293 struct rsrc_card_priv
*priv
,
296 struct device
*dev
= rsrc_priv_to_dev(priv
);
297 struct snd_soc_dai_link
*dai_link
= rsrc_priv_to_link(priv
, idx
);
298 struct asoc_simple_dai
*dai_props
= rsrc_priv_to_props(priv
, idx
);
301 ret
= rsrc_card_parse_links(np
, priv
, idx
, is_fe
);
305 ret
= rsrc_card_parse_clk(np
, priv
, idx
, is_fe
);
309 dev_dbg(dev
, "\t%s / %04x / %d\n",
317 static int rsrc_card_dai_link_of(struct device_node
*node
,
318 struct rsrc_card_priv
*priv
)
320 struct device
*dev
= rsrc_priv_to_dev(priv
);
321 struct snd_soc_dai_link
*dai_link
;
322 struct device_node
*np
;
323 unsigned int daifmt
= 0;
329 for_each_child_of_node(node
, np
) {
330 dai_link
= rsrc_priv_to_link(priv
, i
);
332 if (strcmp(np
->name
, "codec") == 0) {
333 ret
= asoc_simple_card_parse_daifmt(dev
, node
, np
,
343 for_each_child_of_node(node
, np
) {
344 dai_link
= rsrc_priv_to_link(priv
, i
);
345 dai_link
->dai_fmt
= daifmt
;
348 if (strcmp(np
->name
, "cpu") == 0)
351 ret
= rsrc_card_dai_sub_link_of(node
, np
, priv
, i
, is_fe
);
360 static int rsrc_card_parse_of(struct device_node
*node
,
361 struct rsrc_card_priv
*priv
,
364 const struct rsrc_card_of_data
*of_data
= of_device_get_match_data(dev
);
365 struct asoc_simple_dai
*props
;
366 struct snd_soc_dai_link
*links
;
373 num
= of_get_child_count(node
);
374 props
= devm_kzalloc(dev
, sizeof(*props
) * num
, GFP_KERNEL
);
375 links
= devm_kzalloc(dev
, sizeof(*links
) * num
, GFP_KERNEL
);
376 if (!props
|| !links
)
379 priv
->dai_props
= props
;
380 priv
->dai_link
= links
;
382 /* Init snd_soc_card */
383 priv
->snd_card
.owner
= THIS_MODULE
;
384 priv
->snd_card
.dev
= dev
;
385 priv
->snd_card
.dai_link
= priv
->dai_link
;
386 priv
->snd_card
.num_links
= num
;
387 priv
->snd_card
.codec_conf
= &priv
->codec_conf
;
388 priv
->snd_card
.num_configs
= 1;
391 priv
->snd_card
.of_dapm_routes
= of_data
->routes
;
392 priv
->snd_card
.num_of_dapm_routes
= of_data
->num_routes
;
394 snd_soc_of_parse_audio_routing(&priv
->snd_card
,
398 /* sampling rate convert */
399 of_property_read_u32(node
, "convert-rate", &priv
->convert_rate
);
401 /* channels transfer */
402 of_property_read_u32(node
, "convert-channels", &priv
->convert_channels
);
404 dev_dbg(dev
, "New rsrc-audio-card: %s\n",
405 priv
->snd_card
.name
? priv
->snd_card
.name
: "");
406 dev_dbg(dev
, "SRC : convert_rate %d\n", priv
->convert_rate
);
407 dev_dbg(dev
, "CTU : convert_channels %d\n", priv
->convert_channels
);
409 ret
= rsrc_card_dai_link_of(node
, priv
);
413 ret
= asoc_simple_card_parse_card_name(&priv
->snd_card
, "card-");
420 /* Decrease the reference count of the device nodes */
421 static int rsrc_card_unref(struct snd_soc_card
*card
)
423 struct snd_soc_dai_link
*dai_link
;
426 for (num_links
= 0, dai_link
= card
->dai_link
;
427 num_links
< card
->num_links
;
428 num_links
++, dai_link
++) {
429 of_node_put(dai_link
->cpu_of_node
);
430 of_node_put(dai_link
->codec_of_node
);
435 static int rsrc_card_probe(struct platform_device
*pdev
)
437 struct rsrc_card_priv
*priv
;
438 struct device_node
*np
= pdev
->dev
.of_node
;
439 struct device
*dev
= &pdev
->dev
;
442 /* Allocate the private data */
443 priv
= devm_kzalloc(dev
, sizeof(*priv
), GFP_KERNEL
);
447 ret
= rsrc_card_parse_of(np
, priv
, dev
);
449 if (ret
!= -EPROBE_DEFER
)
450 dev_err(dev
, "parse error %d\n", ret
);
454 snd_soc_card_set_drvdata(&priv
->snd_card
, priv
);
456 ret
= devm_snd_soc_register_card(&pdev
->dev
, &priv
->snd_card
);
460 rsrc_card_unref(&priv
->snd_card
);
465 static int rsrc_card_remove(struct platform_device
*pdev
)
467 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
469 return rsrc_card_unref(card
);
472 static struct platform_driver rsrc_card
= {
474 .name
= "renesas-src-audio-card",
475 .of_match_table
= rsrc_card_of_match
,
477 .probe
= rsrc_card_probe
,
478 .remove
= rsrc_card_remove
,
481 module_platform_driver(rsrc_card
);
483 MODULE_ALIAS("platform:renesas-src-audio-card");
484 MODULE_LICENSE("GPL");
485 MODULE_DESCRIPTION("Renesas Sampling Rate Convert Sound Card");
486 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");