xref: /openbmc/linux/sound/soc/codecs/uda1334.c (revision 792008f6)
1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // uda1334.c  --  UDA1334 ALSA SoC Audio driver
4 //
5 // Based on WM8523 ALSA SoC Audio driver written by Mark Brown
6 
7 #include <linux/module.h>
8 #include <linux/moduleparam.h>
9 #include <linux/init.h>
10 #include <linux/delay.h>
11 #include <linux/slab.h>
12 #include <linux/gpio/consumer.h>
13 #include <linux/of_device.h>
14 #include <sound/core.h>
15 #include <sound/pcm.h>
16 #include <sound/pcm_params.h>
17 #include <sound/soc.h>
18 #include <sound/initval.h>
19 
20 #define UDA1334_NUM_RATES 6
21 
22 /* codec private data */
23 struct uda1334_priv {
24 	struct gpio_desc *mute;
25 	struct gpio_desc *deemph;
26 	unsigned int sysclk;
27 	unsigned int rate_constraint_list[UDA1334_NUM_RATES];
28 	struct snd_pcm_hw_constraint_list rate_constraint;
29 };
30 
31 static const struct snd_soc_dapm_widget uda1334_dapm_widgets[] = {
32 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
33 SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
34 SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
35 };
36 
37 static const struct snd_soc_dapm_route uda1334_dapm_routes[] = {
38 	{ "LINEVOUTL", NULL, "DAC" },
39 	{ "LINEVOUTR", NULL, "DAC" },
40 };
41 
uda1334_put_deemph(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)42 static int uda1334_put_deemph(struct snd_kcontrol *kcontrol,
43 			      struct snd_ctl_elem_value *ucontrol)
44 {
45 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
46 	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
47 	int deemph = ucontrol->value.integer.value[0];
48 
49 	if (deemph > 1)
50 		return -EINVAL;
51 
52 	gpiod_set_value_cansleep(uda1334->deemph, deemph);
53 
54 	return 0;
55 };
56 
uda1334_get_deemph(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)57 static int uda1334_get_deemph(struct snd_kcontrol *kcontrol,
58 			      struct snd_ctl_elem_value *ucontrol)
59 {
60 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
61 	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
62 	int ret;
63 
64 	ret = gpiod_get_value_cansleep(uda1334->deemph);
65 	if (ret < 0)
66 		return -EINVAL;
67 
68 	ucontrol->value.integer.value[0] = ret;
69 
70 	return 0;
71 };
72 
73 static const struct snd_kcontrol_new uda1334_snd_controls[] = {
74 	SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
75 			    uda1334_get_deemph, uda1334_put_deemph),
76 };
77 
78 static const struct {
79 	int value;
80 	int ratio;
81 } lrclk_ratios[UDA1334_NUM_RATES] = {
82 	{ 1, 128 },
83 	{ 2, 192 },
84 	{ 3, 256 },
85 	{ 4, 384 },
86 	{ 5, 512 },
87 	{ 6, 768 },
88 };
89 
uda1334_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)90 static int uda1334_startup(struct snd_pcm_substream *substream,
91 			   struct snd_soc_dai *dai)
92 {
93 	struct snd_soc_component *component = dai->component;
94 	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
95 
96 	/*
97 	 * The set of sample rates that can be supported depends on the
98 	 * MCLK supplied to the CODEC - enforce this.
99 	 */
100 	if (!uda1334->sysclk) {
101 		dev_err(component->dev,
102 			"No MCLK configured, call set_sysclk() on init\n");
103 		return -EINVAL;
104 	}
105 
106 	snd_pcm_hw_constraint_list(substream->runtime, 0,
107 				   SNDRV_PCM_HW_PARAM_RATE,
108 				   &uda1334->rate_constraint);
109 
110 	gpiod_set_value_cansleep(uda1334->mute, 1);
111 
112 	return 0;
113 }
114 
uda1334_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)115 static void uda1334_shutdown(struct snd_pcm_substream *substream,
116 			     struct snd_soc_dai *dai)
117 {
118 	struct snd_soc_component *component = dai->component;
119 	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
120 
121 	gpiod_set_value_cansleep(uda1334->mute, 0);
122 }
123 
uda1334_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)124 static int uda1334_set_dai_sysclk(struct snd_soc_dai *codec_dai,
125 				  int clk_id, unsigned int freq, int dir)
126 {
127 	struct snd_soc_component *component = codec_dai->component;
128 	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
129 	unsigned int val;
130 	int i, j = 0;
131 
132 	uda1334->sysclk = freq;
133 
134 	uda1334->rate_constraint.count = 0;
135 	for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
136 		val = freq / lrclk_ratios[i].ratio;
137 		/*
138 		 * Check that it's a standard rate since core can't
139 		 * cope with others and having the odd rates confuses
140 		 * constraint matching.
141 		 */
142 
143 		switch (val) {
144 		case 8000:
145 		case 32000:
146 		case 44100:
147 		case 48000:
148 		case 64000:
149 		case 88200:
150 		case 96000:
151 			dev_dbg(component->dev, "Supported sample rate: %dHz\n",
152 				val);
153 			uda1334->rate_constraint_list[j++] = val;
154 			uda1334->rate_constraint.count++;
155 			break;
156 		default:
157 			dev_dbg(component->dev, "Skipping sample rate: %dHz\n",
158 				val);
159 		}
160 	}
161 
162 	/* Need at least one supported rate... */
163 	if (uda1334->rate_constraint.count == 0)
164 		return -EINVAL;
165 
166 	return 0;
167 }
168 
uda1334_set_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)169 static int uda1334_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
170 {
171 	fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
172 		SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK);
173 
174 	if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
175 		    SND_SOC_DAIFMT_CBC_CFC)) {
176 		dev_err(codec_dai->dev, "Invalid DAI format\n");
177 		return -EINVAL;
178 	}
179 
180 	return 0;
181 }
182 
uda1334_mute_stream(struct snd_soc_dai * dai,int mute,int stream)183 static int uda1334_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
184 {
185 	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(dai->component);
186 
187 	if (uda1334->mute)
188 		gpiod_set_value_cansleep(uda1334->mute, mute);
189 
190 	return 0;
191 }
192 
193 #define UDA1334_RATES SNDRV_PCM_RATE_8000_96000
194 
195 #define UDA1334_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
196 
197 static const struct snd_soc_dai_ops uda1334_dai_ops = {
198 	.startup	= uda1334_startup,
199 	.shutdown	= uda1334_shutdown,
200 	.set_sysclk	= uda1334_set_dai_sysclk,
201 	.set_fmt	= uda1334_set_fmt,
202 	.mute_stream	= uda1334_mute_stream,
203 };
204 
205 static struct snd_soc_dai_driver uda1334_dai = {
206 	.name = "uda1334-hifi",
207 	.playback = {
208 		.stream_name = "Playback",
209 		.channels_min = 2,
210 		.channels_max = 2,
211 		.rates = UDA1334_RATES,
212 		.formats = UDA1334_FORMATS,
213 	},
214 	.ops = &uda1334_dai_ops,
215 };
216 
uda1334_probe(struct snd_soc_component * component)217 static int uda1334_probe(struct snd_soc_component *component)
218 {
219 	struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
220 
221 	uda1334->rate_constraint.list = &uda1334->rate_constraint_list[0];
222 	uda1334->rate_constraint.count =
223 		ARRAY_SIZE(uda1334->rate_constraint_list);
224 
225 	return 0;
226 }
227 
228 static const struct snd_soc_component_driver soc_component_dev_uda1334 = {
229 	.probe			= uda1334_probe,
230 	.controls		= uda1334_snd_controls,
231 	.num_controls		= ARRAY_SIZE(uda1334_snd_controls),
232 	.dapm_widgets		= uda1334_dapm_widgets,
233 	.num_dapm_widgets	= ARRAY_SIZE(uda1334_dapm_widgets),
234 	.dapm_routes		= uda1334_dapm_routes,
235 	.num_dapm_routes	= ARRAY_SIZE(uda1334_dapm_routes),
236 	.idle_bias_on		= 1,
237 	.use_pmdown_time	= 1,
238 	.endianness		= 1,
239 };
240 
241 static const struct of_device_id uda1334_of_match[] = {
242 	{ .compatible = "nxp,uda1334" },
243 	{ /* sentinel*/ }
244 };
245 MODULE_DEVICE_TABLE(of, uda1334_of_match);
246 
uda1334_codec_probe(struct platform_device * pdev)247 static int uda1334_codec_probe(struct platform_device *pdev)
248 {
249 	struct uda1334_priv *uda1334;
250 	int ret;
251 
252 	uda1334 = devm_kzalloc(&pdev->dev, sizeof(struct uda1334_priv),
253 			       GFP_KERNEL);
254 	if (!uda1334)
255 		return -ENOMEM;
256 
257 	platform_set_drvdata(pdev, uda1334);
258 
259 	uda1334->mute = devm_gpiod_get(&pdev->dev, "nxp,mute", GPIOD_OUT_LOW);
260 	if (IS_ERR(uda1334->mute)) {
261 		ret = PTR_ERR(uda1334->mute);
262 		dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret);
263 		return ret;
264 	}
265 
266 	uda1334->deemph = devm_gpiod_get(&pdev->dev, "nxp,deemph", GPIOD_OUT_LOW);
267 	if (IS_ERR(uda1334->deemph)) {
268 		ret = PTR_ERR(uda1334->deemph);
269 		dev_err(&pdev->dev, "Failed to get deemph line: %d\n", ret);
270 		return ret;
271 	}
272 
273 	ret = devm_snd_soc_register_component(&pdev->dev,
274 					      &soc_component_dev_uda1334,
275 					      &uda1334_dai, 1);
276 	if (ret < 0)
277 		dev_err(&pdev->dev, "Failed to register component: %d\n", ret);
278 
279 	return ret;
280 }
281 
282 static struct platform_driver uda1334_codec_driver = {
283 	.probe		= uda1334_codec_probe,
284 	.driver		= {
285 		.name	= "uda1334-codec",
286 		.of_match_table = uda1334_of_match,
287 	},
288 };
289 module_platform_driver(uda1334_codec_driver);
290 
291 MODULE_DESCRIPTION("ASoC UDA1334 driver");
292 MODULE_AUTHOR("Andra Danciu <andradanciu1997@gmail.com>");
293 MODULE_ALIAS("platform:uda1334-codec");
294 MODULE_LICENSE("GPL v2");
295