1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2020, Linaro Limited
3
4#include <dt-bindings/sound/qcom,q6afe.h>
5#include <linux/module.h>
6#include <linux/platform_device.h>
7#include <sound/soc.h>
8#include <sound/soc-dapm.h>
9#include <sound/pcm.h>
10#include <linux/soundwire/sdw.h>
11#include <sound/jack.h>
12#include <linux/input-event-codes.h>
13#include "qdsp6/q6afe.h"
14#include "common.h"
15#include "sdw.h"
16
17#define DRIVER_NAME "sm8250"
18#define MI2S_BCLK_RATE 1536000
19
20struct sm8250_snd_data {
21 bool stream_prepared[AFE_PORT_MAX];
22 struct snd_soc_card *card;
23 struct sdw_stream_runtime *sruntime[AFE_PORT_MAX];
24 struct snd_soc_jack jack;
25 bool jack_setup;
26};
27
28static int sm8250_snd_init(struct snd_soc_pcm_runtime *rtd)
29{
30 struct sm8250_snd_data *data = snd_soc_card_get_drvdata(card: rtd->card);
31
32 return qcom_snd_wcd_jack_setup(rtd, jack: &data->jack, jack_setup: &data->jack_setup);
33}
34
35static int sm8250_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
36 struct snd_pcm_hw_params *params)
37{
38 struct snd_interval *rate = hw_param_interval(params,
39 SNDRV_PCM_HW_PARAM_RATE);
40 struct snd_interval *channels = hw_param_interval(params,
41 SNDRV_PCM_HW_PARAM_CHANNELS);
42
43 rate->min = rate->max = 48000;
44 channels->min = channels->max = 2;
45
46 return 0;
47}
48
49static int sm8250_snd_startup(struct snd_pcm_substream *substream)
50{
51 unsigned int fmt = SND_SOC_DAIFMT_BP_FP;
52 unsigned int codec_dai_fmt = SND_SOC_DAIFMT_BC_FC;
53 struct snd_soc_pcm_runtime *rtd = substream->private_data;
54 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
55 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
56
57 switch (cpu_dai->id) {
58 case TERTIARY_MI2S_RX:
59 codec_dai_fmt |= SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_I2S;
60 snd_soc_dai_set_sysclk(dai: cpu_dai,
61 Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,
62 MI2S_BCLK_RATE, dir: SNDRV_PCM_STREAM_PLAYBACK);
63 snd_soc_dai_set_fmt(dai: cpu_dai, fmt);
64 snd_soc_dai_set_fmt(dai: codec_dai, fmt: codec_dai_fmt);
65 break;
66 default:
67 break;
68 }
69
70 return qcom_snd_sdw_startup(substream);
71}
72
73static void sm2450_snd_shutdown(struct snd_pcm_substream *substream)
74{
75 struct snd_soc_pcm_runtime *rtd = substream->private_data;
76 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
77 struct sm8250_snd_data *data = snd_soc_card_get_drvdata(card: rtd->card);
78 struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
79
80 data->sruntime[cpu_dai->id] = NULL;
81 sdw_release_stream(stream: sruntime);
82}
83
84static int sm8250_snd_hw_params(struct snd_pcm_substream *substream,
85 struct snd_pcm_hw_params *params)
86{
87 struct snd_soc_pcm_runtime *rtd = substream->private_data;
88 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
89 struct sm8250_snd_data *pdata = snd_soc_card_get_drvdata(card: rtd->card);
90
91 return qcom_snd_sdw_hw_params(substream, params, psruntime: &pdata->sruntime[cpu_dai->id]);
92}
93
94static int sm8250_snd_prepare(struct snd_pcm_substream *substream)
95{
96 struct snd_soc_pcm_runtime *rtd = substream->private_data;
97 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
98 struct sm8250_snd_data *data = snd_soc_card_get_drvdata(card: rtd->card);
99 struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
100
101 return qcom_snd_sdw_prepare(substream, runtime: sruntime,
102 stream_prepared: &data->stream_prepared[cpu_dai->id]);
103}
104
105static int sm8250_snd_hw_free(struct snd_pcm_substream *substream)
106{
107 struct snd_soc_pcm_runtime *rtd = substream->private_data;
108 struct sm8250_snd_data *data = snd_soc_card_get_drvdata(card: rtd->card);
109 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
110 struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
111
112 return qcom_snd_sdw_hw_free(substream, sruntime,
113 stream_prepared: &data->stream_prepared[cpu_dai->id]);
114}
115
116static const struct snd_soc_ops sm8250_be_ops = {
117 .startup = sm8250_snd_startup,
118 .shutdown = sm2450_snd_shutdown,
119 .hw_params = sm8250_snd_hw_params,
120 .hw_free = sm8250_snd_hw_free,
121 .prepare = sm8250_snd_prepare,
122};
123
124static void sm8250_add_be_ops(struct snd_soc_card *card)
125{
126 struct snd_soc_dai_link *link;
127 int i;
128
129 for_each_card_prelinks(card, i, link) {
130 if (link->no_pcm == 1) {
131 link->init = sm8250_snd_init;
132 link->be_hw_params_fixup = sm8250_be_hw_params_fixup;
133 link->ops = &sm8250_be_ops;
134 }
135 }
136}
137
138static int sm8250_platform_probe(struct platform_device *pdev)
139{
140 struct snd_soc_card *card;
141 struct sm8250_snd_data *data;
142 struct device *dev = &pdev->dev;
143 int ret;
144
145 card = devm_kzalloc(dev, size: sizeof(*card), GFP_KERNEL);
146 if (!card)
147 return -ENOMEM;
148
149 card->owner = THIS_MODULE;
150 /* Allocate the private data */
151 data = devm_kzalloc(dev, size: sizeof(*data), GFP_KERNEL);
152 if (!data)
153 return -ENOMEM;
154
155 card->dev = dev;
156 dev_set_drvdata(dev, data: card);
157 snd_soc_card_set_drvdata(card, data);
158 ret = qcom_snd_parse_of(card);
159 if (ret)
160 return ret;
161
162 card->driver_name = DRIVER_NAME;
163 sm8250_add_be_ops(card);
164 return devm_snd_soc_register_card(dev, card);
165}
166
167static const struct of_device_id snd_sm8250_dt_match[] = {
168 {.compatible = "qcom,sm8250-sndcard"},
169 {.compatible = "qcom,qrb5165-rb5-sndcard"},
170 {}
171};
172
173MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);
174
175static struct platform_driver snd_sm8250_driver = {
176 .probe = sm8250_platform_probe,
177 .driver = {
178 .name = "snd-sm8250",
179 .of_match_table = snd_sm8250_dt_match,
180 },
181};
182module_platform_driver(snd_sm8250_driver);
183MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
184MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");
185MODULE_LICENSE("GPL");
186

source code of linux/sound/soc/qcom/sm8250.c