1
2
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 "qdsp6/q6afe.h"
12#include "common.h"
13
14#define DRIVER_NAME "sm8250"
15#define MI2S_BCLK_RATE 1536000
16
17struct sm8250_snd_data {
18 bool stream_prepared[AFE_PORT_MAX];
19 struct snd_soc_card *card;
20 struct sdw_stream_runtime *sruntime[AFE_PORT_MAX];
21};
22
23static int sm8250_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
24 struct snd_pcm_hw_params *params)
25{
26 struct snd_interval *rate = hw_param_interval(params,
27 SNDRV_PCM_HW_PARAM_RATE);
28 struct snd_interval *channels = hw_param_interval(params,
29 SNDRV_PCM_HW_PARAM_CHANNELS);
30
31 rate->min = rate->max = 48000;
32 channels->min = channels->max = 2;
33
34 return 0;
35}
36
37static int sm8250_snd_startup(struct snd_pcm_substream *substream)
38{
39 unsigned int fmt = SND_SOC_DAIFMT_CBS_CFS;
40 unsigned int codec_dai_fmt = SND_SOC_DAIFMT_CBS_CFS;
41 struct snd_soc_pcm_runtime *rtd = substream->private_data;
42 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
43 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
44
45 switch (cpu_dai->id) {
46 case TERTIARY_MI2S_RX:
47 codec_dai_fmt |= SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_I2S;
48 snd_soc_dai_set_sysclk(cpu_dai,
49 Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,
50 MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
51 snd_soc_dai_set_fmt(cpu_dai, fmt);
52 snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt);
53 break;
54 default:
55 break;
56 }
57 return 0;
58}
59
60static int sm8250_snd_hw_params(struct snd_pcm_substream *substream,
61 struct snd_pcm_hw_params *params)
62{
63 struct snd_soc_pcm_runtime *rtd = substream->private_data;
64 struct snd_soc_dai *codec_dai;
65 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
66 struct sm8250_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);
67 struct sdw_stream_runtime *sruntime;
68 int i;
69
70 switch (cpu_dai->id) {
71 case WSA_CODEC_DMA_RX_0:
72 for_each_rtd_codec_dais(rtd, i, codec_dai) {
73 sruntime = snd_soc_dai_get_sdw_stream(codec_dai,
74 substream->stream);
75 if (sruntime != ERR_PTR(-ENOTSUPP))
76 pdata->sruntime[cpu_dai->id] = sruntime;
77 }
78 break;
79 }
80
81 return 0;
82
83}
84
85static int sm8250_snd_wsa_dma_prepare(struct snd_pcm_substream *substream)
86{
87 struct snd_soc_pcm_runtime *rtd = substream->private_data;
88 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
89 struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
90 struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
91 int ret;
92
93 if (!sruntime)
94 return 0;
95
96 if (data->stream_prepared[cpu_dai->id]) {
97 sdw_disable_stream(sruntime);
98 sdw_deprepare_stream(sruntime);
99 data->stream_prepared[cpu_dai->id] = false;
100 }
101
102 ret = sdw_prepare_stream(sruntime);
103 if (ret)
104 return ret;
105
106
107
108
109
110
111
112
113
114 ret = sdw_enable_stream(sruntime);
115 if (ret) {
116 sdw_deprepare_stream(sruntime);
117 return ret;
118 }
119 data->stream_prepared[cpu_dai->id] = true;
120
121 return ret;
122}
123
124static int sm8250_snd_prepare(struct snd_pcm_substream *substream)
125{
126 struct snd_soc_pcm_runtime *rtd = substream->private_data;
127 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
128
129 switch (cpu_dai->id) {
130 case WSA_CODEC_DMA_RX_0:
131 case WSA_CODEC_DMA_RX_1:
132 return sm8250_snd_wsa_dma_prepare(substream);
133 default:
134 break;
135 }
136
137 return 0;
138}
139
140static int sm8250_snd_hw_free(struct snd_pcm_substream *substream)
141{
142 struct snd_soc_pcm_runtime *rtd = substream->private_data;
143 struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
144 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
145 struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
146
147 switch (cpu_dai->id) {
148 case WSA_CODEC_DMA_RX_0:
149 case WSA_CODEC_DMA_RX_1:
150 if (sruntime && data->stream_prepared[cpu_dai->id]) {
151 sdw_disable_stream(sruntime);
152 sdw_deprepare_stream(sruntime);
153 data->stream_prepared[cpu_dai->id] = false;
154 }
155 break;
156 default:
157 break;
158 }
159
160 return 0;
161}
162
163static const struct snd_soc_ops sm8250_be_ops = {
164 .startup = sm8250_snd_startup,
165 .hw_params = sm8250_snd_hw_params,
166 .hw_free = sm8250_snd_hw_free,
167 .prepare = sm8250_snd_prepare,
168};
169
170static void sm8250_add_be_ops(struct snd_soc_card *card)
171{
172 struct snd_soc_dai_link *link;
173 int i;
174
175 for_each_card_prelinks(card, i, link) {
176 if (link->no_pcm == 1) {
177 link->be_hw_params_fixup = sm8250_be_hw_params_fixup;
178 link->ops = &sm8250_be_ops;
179 }
180 }
181}
182
183static int sm8250_platform_probe(struct platform_device *pdev)
184{
185 struct snd_soc_card *card;
186 struct sm8250_snd_data *data;
187 struct device *dev = &pdev->dev;
188 int ret;
189
190 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
191 if (!card)
192 return -ENOMEM;
193
194
195 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
196 if (!data)
197 return -ENOMEM;
198
199 card->dev = dev;
200 dev_set_drvdata(dev, card);
201 snd_soc_card_set_drvdata(card, data);
202 ret = qcom_snd_parse_of(card);
203 if (ret)
204 return ret;
205
206 card->driver_name = DRIVER_NAME;
207 sm8250_add_be_ops(card);
208 return devm_snd_soc_register_card(dev, card);
209}
210
211static const struct of_device_id snd_sm8250_dt_match[] = {
212 {.compatible = "qcom,sm8250-sndcard"},
213 {.compatible = "qcom,qrb5165-rb5-sndcard"},
214 {}
215};
216
217MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);
218
219static struct platform_driver snd_sm8250_driver = {
220 .probe = sm8250_platform_probe,
221 .driver = {
222 .name = "snd-sm8250",
223 .of_match_table = snd_sm8250_dt_match,
224 },
225};
226module_platform_driver(snd_sm8250_driver);
227MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
228MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");
229MODULE_LICENSE("GPL v2");
230
