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 
16 #define DRIVER_NAME		"sm8250"
17 #define MI2S_BCLK_RATE		1536000
18 
19 struct sm8250_snd_data {
20 	bool stream_prepared[AFE_PORT_MAX];
21 	struct snd_soc_card *card;
22 	struct sdw_stream_runtime *sruntime[AFE_PORT_MAX];
23 	struct snd_soc_jack jack;
24 	bool jack_setup;
25 };
26 
sm8250_snd_init(struct snd_soc_pcm_runtime * rtd)27 static int sm8250_snd_init(struct snd_soc_pcm_runtime *rtd)
28 {
29 	struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
30 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
31 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
32 	struct snd_soc_card *card = rtd->card;
33 	int rval, i;
34 
35 	if (!data->jack_setup) {
36 		struct snd_jack *jack;
37 
38 		rval = snd_soc_card_jack_new(card, "Headset Jack",
39 					     SND_JACK_HEADSET | SND_JACK_LINEOUT |
40 					     SND_JACK_MECHANICAL |
41 					     SND_JACK_BTN_0 | SND_JACK_BTN_1 |
42 					     SND_JACK_BTN_2 | SND_JACK_BTN_3 |
43 					     SND_JACK_BTN_4 | SND_JACK_BTN_5,
44 					     &data->jack, NULL, 0);
45 
46 		if (rval < 0) {
47 			dev_err(card->dev, "Unable to add Headphone Jack\n");
48 			return rval;
49 		}
50 
51 		jack = data->jack.jack;
52 
53 		snd_jack_set_key(jack, SND_JACK_BTN_0, KEY_MEDIA);
54 		snd_jack_set_key(jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
55 		snd_jack_set_key(jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
56 		snd_jack_set_key(jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
57 		data->jack_setup = true;
58 	}
59 
60 	switch (cpu_dai->id) {
61 	case TX_CODEC_DMA_TX_0:
62 	case TX_CODEC_DMA_TX_1:
63 	case TX_CODEC_DMA_TX_2:
64 	case TX_CODEC_DMA_TX_3:
65 		for_each_rtd_codec_dais(rtd, i, codec_dai) {
66 			rval = snd_soc_component_set_jack(codec_dai->component,
67 							  &data->jack, NULL);
68 			if (rval != 0 && rval != -ENOTSUPP) {
69 				dev_warn(card->dev, "Failed to set jack: %d\n", rval);
70 				return rval;
71 			}
72 		}
73 
74 		break;
75 	default:
76 		break;
77 	}
78 
79 
80 	return 0;
81 }
82 
sm8250_be_hw_params_fixup(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hw_params * params)83 static int sm8250_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
84 				     struct snd_pcm_hw_params *params)
85 {
86 	struct snd_interval *rate = hw_param_interval(params,
87 					SNDRV_PCM_HW_PARAM_RATE);
88 	struct snd_interval *channels = hw_param_interval(params,
89 					SNDRV_PCM_HW_PARAM_CHANNELS);
90 
91 	rate->min = rate->max = 48000;
92 	channels->min = channels->max = 2;
93 
94 	return 0;
95 }
96 
sm8250_snd_startup(struct snd_pcm_substream * substream)97 static int sm8250_snd_startup(struct snd_pcm_substream *substream)
98 {
99 	unsigned int fmt = SND_SOC_DAIFMT_CBS_CFS;
100 	unsigned int codec_dai_fmt = SND_SOC_DAIFMT_CBS_CFS;
101 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
102 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
103 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
104 
105 	switch (cpu_dai->id) {
106 	case TERTIARY_MI2S_RX:
107 		codec_dai_fmt |= SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_I2S;
108 		snd_soc_dai_set_sysclk(cpu_dai,
109 			Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT,
110 			MI2S_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
111 		snd_soc_dai_set_fmt(cpu_dai, fmt);
112 		snd_soc_dai_set_fmt(codec_dai, codec_dai_fmt);
113 		break;
114 	default:
115 		break;
116 	}
117 	return 0;
118 }
119 
sm8250_snd_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)120 static int sm8250_snd_hw_params(struct snd_pcm_substream *substream,
121 				struct snd_pcm_hw_params *params)
122 {
123 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
124 	struct snd_soc_dai *codec_dai;
125 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
126 	struct sm8250_snd_data *pdata = snd_soc_card_get_drvdata(rtd->card);
127 	struct sdw_stream_runtime *sruntime;
128 	int i;
129 
130 	switch (cpu_dai->id) {
131 	case WSA_CODEC_DMA_RX_0:
132 	case RX_CODEC_DMA_RX_0:
133 	case RX_CODEC_DMA_RX_1:
134 	case TX_CODEC_DMA_TX_0:
135 	case TX_CODEC_DMA_TX_1:
136 	case TX_CODEC_DMA_TX_2:
137 	case TX_CODEC_DMA_TX_3:
138 		for_each_rtd_codec_dais(rtd, i, codec_dai) {
139 			sruntime = snd_soc_dai_get_sdw_stream(codec_dai,
140 						      substream->stream);
141 			if (sruntime != ERR_PTR(-ENOTSUPP))
142 				pdata->sruntime[cpu_dai->id] = sruntime;
143 		}
144 		break;
145 	}
146 
147 	return 0;
148 
149 }
150 
sm8250_snd_wsa_dma_prepare(struct snd_pcm_substream * substream)151 static int sm8250_snd_wsa_dma_prepare(struct snd_pcm_substream *substream)
152 {
153 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
154 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
155 	struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
156 	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
157 	int ret;
158 
159 	if (!sruntime)
160 		return 0;
161 
162 	if (data->stream_prepared[cpu_dai->id]) {
163 		sdw_disable_stream(sruntime);
164 		sdw_deprepare_stream(sruntime);
165 		data->stream_prepared[cpu_dai->id] = false;
166 	}
167 
168 	ret = sdw_prepare_stream(sruntime);
169 	if (ret)
170 		return ret;
171 
172 	/**
173 	 * NOTE: there is a strict hw requirement about the ordering of port
174 	 * enables and actual WSA881x PA enable. PA enable should only happen
175 	 * after soundwire ports are enabled if not DC on the line is
176 	 * accumulated resulting in Click/Pop Noise
177 	 * PA enable/mute are handled as part of codec DAPM and digital mute.
178 	 */
179 
180 	ret = sdw_enable_stream(sruntime);
181 	if (ret) {
182 		sdw_deprepare_stream(sruntime);
183 		return ret;
184 	}
185 	data->stream_prepared[cpu_dai->id]  = true;
186 
187 	return ret;
188 }
189 
sm8250_snd_prepare(struct snd_pcm_substream * substream)190 static int sm8250_snd_prepare(struct snd_pcm_substream *substream)
191 {
192 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
193 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
194 
195 	switch (cpu_dai->id) {
196 	case WSA_CODEC_DMA_RX_0:
197 	case WSA_CODEC_DMA_RX_1:
198 	case RX_CODEC_DMA_RX_0:
199 	case RX_CODEC_DMA_RX_1:
200 	case TX_CODEC_DMA_TX_0:
201 	case TX_CODEC_DMA_TX_1:
202 	case TX_CODEC_DMA_TX_2:
203 	case TX_CODEC_DMA_TX_3:
204 		return sm8250_snd_wsa_dma_prepare(substream);
205 	default:
206 		break;
207 	}
208 
209 	return 0;
210 }
211 
sm8250_snd_hw_free(struct snd_pcm_substream * substream)212 static int sm8250_snd_hw_free(struct snd_pcm_substream *substream)
213 {
214 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
215 	struct sm8250_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
216 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
217 	struct sdw_stream_runtime *sruntime = data->sruntime[cpu_dai->id];
218 
219 	switch (cpu_dai->id) {
220 	case WSA_CODEC_DMA_RX_0:
221 	case WSA_CODEC_DMA_RX_1:
222 	case RX_CODEC_DMA_RX_0:
223 	case RX_CODEC_DMA_RX_1:
224 	case TX_CODEC_DMA_TX_0:
225 	case TX_CODEC_DMA_TX_1:
226 	case TX_CODEC_DMA_TX_2:
227 	case TX_CODEC_DMA_TX_3:
228 		if (sruntime && data->stream_prepared[cpu_dai->id]) {
229 			sdw_disable_stream(sruntime);
230 			sdw_deprepare_stream(sruntime);
231 			data->stream_prepared[cpu_dai->id] = false;
232 		}
233 		break;
234 	default:
235 		break;
236 	}
237 
238 	return 0;
239 }
240 
241 static const struct snd_soc_ops sm8250_be_ops = {
242 	.startup = sm8250_snd_startup,
243 	.hw_params = sm8250_snd_hw_params,
244 	.hw_free = sm8250_snd_hw_free,
245 	.prepare = sm8250_snd_prepare,
246 };
247 
sm8250_add_be_ops(struct snd_soc_card * card)248 static void sm8250_add_be_ops(struct snd_soc_card *card)
249 {
250 	struct snd_soc_dai_link *link;
251 	int i;
252 
253 	for_each_card_prelinks(card, i, link) {
254 		if (link->no_pcm == 1) {
255 			link->init = sm8250_snd_init;
256 			link->be_hw_params_fixup = sm8250_be_hw_params_fixup;
257 			link->ops = &sm8250_be_ops;
258 		}
259 	}
260 }
261 
sm8250_platform_probe(struct platform_device * pdev)262 static int sm8250_platform_probe(struct platform_device *pdev)
263 {
264 	struct snd_soc_card *card;
265 	struct sm8250_snd_data *data;
266 	struct device *dev = &pdev->dev;
267 	int ret;
268 
269 	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
270 	if (!card)
271 		return -ENOMEM;
272 
273 	/* Allocate the private data */
274 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
275 	if (!data)
276 		return -ENOMEM;
277 
278 	card->dev = dev;
279 	dev_set_drvdata(dev, card);
280 	snd_soc_card_set_drvdata(card, data);
281 	ret = qcom_snd_parse_of(card);
282 	if (ret)
283 		return ret;
284 
285 	card->driver_name = DRIVER_NAME;
286 	sm8250_add_be_ops(card);
287 	return devm_snd_soc_register_card(dev, card);
288 }
289 
290 static const struct of_device_id snd_sm8250_dt_match[] = {
291 	{.compatible = "qcom,sm8250-sndcard"},
292 	{.compatible = "qcom,qrb5165-rb5-sndcard"},
293 	{}
294 };
295 
296 MODULE_DEVICE_TABLE(of, snd_sm8250_dt_match);
297 
298 static struct platform_driver snd_sm8250_driver = {
299 	.probe  = sm8250_platform_probe,
300 	.driver = {
301 		.name = "snd-sm8250",
302 		.of_match_table = snd_sm8250_dt_match,
303 	},
304 };
305 module_platform_driver(snd_sm8250_driver);
306 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
307 MODULE_DESCRIPTION("SM8250 ASoC Machine Driver");
308 MODULE_LICENSE("GPL v2");
309