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/mod_devicetable.h>
8 #include <linux/module.h>
9 #include <linux/moduleparam.h>
10 #include <linux/init.h>
11 #include <linux/delay.h>
12 #include <linux/slab.h>
13 #include <linux/gpio/consumer.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
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
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
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
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
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
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
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
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
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
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