xref: /linux/sound/soc/qcom/sm8250.c (revision 87807f77a03d0271211b75f84b2a8b88f4e8e5d4)
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2020, Linaro Limited
3 
4 #include <linux/module.h>
5 #include <linux/platform_device.h>
6 #include <linux/of_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 
20 struct 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 
28 static int sm8250_snd_init(struct snd_soc_pcm_runtime *rtd)
29 {
30 	struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
31 
32 	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
33 }
34 
35 static 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 
49 static 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 = asoc_rtd_to_cpu(rtd, 0);
55 	struct snd_soc_dai *codec_dai = asoc_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(cpu_dai,
61 			Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,
62 			MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
63 		snd_soc_dai_set_fmt(cpu_dai, fmt);
64 		snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt);
65 		break;
66 	default:
67 		break;
68 	}
69 	return 0;
70 }
71 
72 static int sm8250_snd_hw_params(struct snd_pcm_substream *substream,
73 				struct snd_pcm_hw_params *params)
74 {
75 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
76 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
77 	struct sm8250_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);
78 
79 	return qcom_snd_sdw_hw_params(substream, params, &pdata->sruntime[cpu_dai->id]);
80 }
81 
82 static int sm8250_snd_prepare(struct snd_pcm_substream *substream)
83 {
84 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
85 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
86 	struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
87 	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
88 
89 	return qcom_snd_sdw_prepare(substream, sruntime,
90 				    &data->stream_prepared[cpu_dai->id]);
91 }
92 
93 static int sm8250_snd_hw_free(struct snd_pcm_substream *substream)
94 {
95 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
96 	struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
97 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
98 	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
99 
100 	return qcom_snd_sdw_hw_free(substream, sruntime,
101 				    &data->stream_prepared[cpu_dai->id]);
102 }
103 
104 static const struct snd_soc_ops sm8250_be_ops = {
105 	.startup = sm8250_snd_startup,
106 	.hw_params = sm8250_snd_hw_params,
107 	.hw_free = sm8250_snd_hw_free,
108 	.prepare = sm8250_snd_prepare,
109 };
110 
111 static void sm8250_add_be_ops(struct snd_soc_card *card)
112 {
113 	struct snd_soc_dai_link *link;
114 	int i;
115 
116 	for_each_card_prelinks(card, i, link) {
117 		if (link->no_pcm == 1) {
118 			link->init = sm8250_snd_init;
119 			link->be_hw_params_fixup = sm8250_be_hw_params_fixup;
120 			link->ops = &sm8250_be_ops;
121 		}
122 	}
123 }
124 
125 static int sm8250_platform_probe(struct platform_device *pdev)
126 {
127 	struct snd_soc_card *card;
128 	struct sm8250_snd_data *data;
129 	struct device *dev = &pdev->dev;
130 	int ret;
131 
132 	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
133 	if (!card)
134 		return -ENOMEM;
135 
136 	card->owner = THIS_MODULE;
137 	/* Allocate the private data */
138 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
139 	if (!data)
140 		return -ENOMEM;
141 
142 	card->dev = dev;
143 	dev_set_drvdata(dev, card);
144 	snd_soc_card_set_drvdata(card, data);
145 	ret = qcom_snd_parse_of(card);
146 	if (ret)
147 		return ret;
148 
149 	card->driver_name = DRIVER_NAME;
150 	sm8250_add_be_ops(card);
151 	return devm_snd_soc_register_card(dev, card);
152 }
153 
154 static const struct of_device_id snd_sm8250_dt_match[] = {
155 	{.compatible = "qcom,sm8250-sndcard"},
156 	{.compatible = "qcom,qrb5165-rb5-sndcard"},
157 	{}
158 };
159 
160 MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);
161 
162 static struct platform_driver snd_sm8250_driver = {
163 	.probe  = sm8250_platform_probe,
164 	.driver = {
165 		.name = "snd-sm8250",
166 		.of_match_table = snd_sm8250_dt_match,
167 	},
168 };
169 module_platform_driver(snd_sm8250_driver);
170 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
171 MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");
172 MODULE_LICENSE("GPL v2");
173