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
sm8250_snd_init(struct snd_soc_pcm_runtime * rtd)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
sm8250_be_hw_params_fixup(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hw_params * params)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
sm8250_snd_startup(struct snd_pcm_substream * substream)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 = 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(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
sm8250_snd_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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 = snd_soc_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
sm8250_snd_prepare(struct snd_pcm_substream * substream)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 = snd_soc_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
sm8250_snd_hw_free(struct snd_pcm_substream * substream)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 = snd_soc_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
sm8250_add_be_ops(struct snd_soc_card * card)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
sm8250_platform_probe(struct platform_device * pdev)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,qrb4210-rb2-sndcard"},
157 {.compatible = "qcom,qrb5165-rb5-sndcard"},
158 {}
159 };
160
161 MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);
162
163 static struct platform_driver snd_sm8250_driver = {
164 .probe = sm8250_platform_probe,
165 .driver = {
166 .name = "snd-sm8250",
167 .of_match_table = snd_sm8250_dt_match,
168 },
169 };
170 module_platform_driver(snd_sm8250_driver);
171 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
172 MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");
173 MODULE_LICENSE("GPL v2");
174