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