1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2017 BayLibre, SAS.
4 * Author: Jerome Brunet <jbrunet@baylibre.com>
5 */
6
7 #include <linux/of_platform.h>
8 #include <linux/module.h>
9 #include <sound/soc.h>
10
11 /*
12 * The everest 7134 is a very simple DA converter with no register
13 */
14
15 struct es7134_clock_mode {
16 unsigned int rate_min;
17 unsigned int rate_max;
18 unsigned int *mclk_fs;
19 unsigned int mclk_fs_num;
20 };
21
22 struct es7134_chip {
23 struct snd_soc_dai_driver *dai_drv;
24 const struct es7134_clock_mode *modes;
25 unsigned int mode_num;
26 const struct snd_soc_dapm_widget *extra_widgets;
27 unsigned int extra_widget_num;
28 const struct snd_soc_dapm_route *extra_routes;
29 unsigned int extra_route_num;
30 };
31
32 struct es7134_data {
33 unsigned int mclk;
34 const struct es7134_chip *chip;
35 };
36
37 static int es7134_check_mclk(struct snd_soc_dai *dai,
38 struct es7134_data *priv,
39 unsigned int rate)
40 {
41 unsigned int mfs = priv->mclk / rate;
42 int i, j;
43
44 for (i = 0; i < priv->chip->mode_num; i++) {
45 const struct es7134_clock_mode *mode = &priv->chip->modes[i];
46
47 if (rate < mode->rate_min || rate > mode->rate_max)
48 continue;
49
50 for (j = 0; j < mode->mclk_fs_num; j++) {
51 if (mode->mclk_fs[j] == mfs)
52 return 0;
53 }
54
55 dev_err(dai->dev, "unsupported mclk_fs %u for rate %u\n",
56 mfs, rate);
57 return -EINVAL;
58 }
59
60 /* should not happen */
61 dev_err(dai->dev, "unsupported rate: %u\n", rate);
62 return -EINVAL;
63 }
64
65 static int es7134_hw_params(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params *params,
67 struct snd_soc_dai *dai)
68 {
69 struct es7134_data *priv = snd_soc_dai_get_drvdata(dai);
70
71 /* mclk has not been provided, assume it is OK */
72 if (!priv->mclk)
73 return 0;
74
75 return es7134_check_mclk(dai, priv, params_rate(params));
76 }
77
78 static int es7134_set_sysclk(struct snd_soc_dai *dai, int clk_id,
79 unsigned int freq, int dir)
80 {
81 struct es7134_data *priv = snd_soc_dai_get_drvdata(dai);
82
83 if (dir == SND_SOC_CLOCK_IN && clk_id == 0) {
84 priv->mclk = freq;
85 return 0;
86 }
87
88 return -ENOTSUPP;
89 }
90
91 static int es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
92 {
93 fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
94 SND_SOC_DAIFMT_MASTER_MASK);
95
96 if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
97 SND_SOC_DAIFMT_CBC_CFC)) {
98 dev_err(codec_dai->dev, "Invalid DAI format\n");
99 return -EINVAL;
100 }
101
102 return 0;
103 }
104
105 static int es7134_component_probe(struct snd_soc_component *c)
106 {
107 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(c);
108 struct es7134_data *priv = snd_soc_component_get_drvdata(c);
109 const struct es7134_chip *chip = priv->chip;
110 int ret;
111
112 if (chip->extra_widget_num) {
113 ret = snd_soc_dapm_new_controls(dapm, chip->extra_widgets,
114 chip->extra_widget_num);
115 if (ret) {
116 dev_err(c->dev, "failed to add extra widgets\n");
117 return ret;
118 }
119 }
120
121 if (chip->extra_route_num) {
122 ret = snd_soc_dapm_add_routes(dapm, chip->extra_routes,
123 chip->extra_route_num);
124 if (ret) {
125 dev_err(c->dev, "failed to add extra routes\n");
126 return ret;
127 }
128 }
129
130 return 0;
131 }
132
133 static const struct snd_soc_dai_ops es7134_dai_ops = {
134 .set_fmt = es7134_set_fmt,
135 .hw_params = es7134_hw_params,
136 .set_sysclk = es7134_set_sysclk,
137 };
138
139 static struct snd_soc_dai_driver es7134_dai = {
140 .name = "es7134-hifi",
141 .playback = {
142 .stream_name = "Playback",
143 .channels_min = 2,
144 .channels_max = 2,
145 .rates = (SNDRV_PCM_RATE_8000_48000 |
146 SNDRV_PCM_RATE_88200 |
147 SNDRV_PCM_RATE_96000 |
148 SNDRV_PCM_RATE_176400 |
149 SNDRV_PCM_RATE_192000),
150 .formats = (SNDRV_PCM_FMTBIT_S16_LE |
151 SNDRV_PCM_FMTBIT_S18_3LE |
152 SNDRV_PCM_FMTBIT_S20_3LE |
153 SNDRV_PCM_FMTBIT_S24_3LE |
154 SNDRV_PCM_FMTBIT_S24_LE),
155 },
156 .ops = &es7134_dai_ops,
157 };
158
159 static const struct es7134_clock_mode es7134_modes[] = {
160 {
161 /* Single speed mode */
162 .rate_min = 8000,
163 .rate_max = 50000,
164 .mclk_fs = (unsigned int[]) { 256, 384, 512, 768, 1024 },
165 .mclk_fs_num = 5,
166 }, {
167 /* Double speed mode */
168 .rate_min = 84000,
169 .rate_max = 100000,
170 .mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512 },
171 .mclk_fs_num = 5,
172 }, {
173 /* Quad speed mode */
174 .rate_min = 167000,
175 .rate_max = 192000,
176 .mclk_fs = (unsigned int[]) { 128, 192, 256 },
177 .mclk_fs_num = 3,
178 },
179 };
180
181 /* Digital I/O are also supplied by VDD on the es7134 */
182 static const struct snd_soc_dapm_route es7134_extra_routes[] = {
183 { "Playback", NULL, "VDD", }
184 };
185
186 static const struct es7134_chip es7134_chip __maybe_unused = {
187 .dai_drv = &es7134_dai,
188 .modes = es7134_modes,
189 .mode_num = ARRAY_SIZE(es7134_modes),
190 .extra_routes = es7134_extra_routes,
191 .extra_route_num = ARRAY_SIZE(es7134_extra_routes),
192 };
193
194 static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = {
195 SND_SOC_DAPM_OUTPUT("AOUTL"),
196 SND_SOC_DAPM_OUTPUT("AOUTR"),
197 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
198 SND_SOC_DAPM_REGULATOR_SUPPLY("VDD", 0, 0),
199 };
200
201 static const struct snd_soc_dapm_route es7134_dapm_routes[] = {
202 { "AOUTL", NULL, "DAC" },
203 { "AOUTR", NULL, "DAC" },
204 { "DAC", NULL, "VDD" },
205 };
206
207 static const struct snd_soc_component_driver es7134_component_driver = {
208 .probe = es7134_component_probe,
209 .dapm_widgets = es7134_dapm_widgets,
210 .num_dapm_widgets = ARRAY_SIZE(es7134_dapm_widgets),
211 .dapm_routes = es7134_dapm_routes,
212 .num_dapm_routes = ARRAY_SIZE(es7134_dapm_routes),
213 .idle_bias_on = 1,
214 .use_pmdown_time = 1,
215 .endianness = 1,
216 };
217
218 static struct snd_soc_dai_driver es7154_dai = {
219 .name = "es7154-hifi",
220 .playback = {
221 .stream_name = "Playback",
222 .channels_min = 2,
223 .channels_max = 2,
224 .rates = (SNDRV_PCM_RATE_8000_48000 |
225 SNDRV_PCM_RATE_88200 |
226 SNDRV_PCM_RATE_96000),
227 .formats = (SNDRV_PCM_FMTBIT_S16_LE |
228 SNDRV_PCM_FMTBIT_S18_3LE |
229 SNDRV_PCM_FMTBIT_S20_3LE |
230 SNDRV_PCM_FMTBIT_S24_3LE |
231 SNDRV_PCM_FMTBIT_S24_LE),
232 },
233 .ops = &es7134_dai_ops,
234 };
235
236 static const struct es7134_clock_mode es7154_modes[] = {
237 {
238 /* Single speed mode */
239 .rate_min = 8000,
240 .rate_max = 50000,
241 .mclk_fs = (unsigned int[]) { 32, 64, 128, 192, 256,
242 384, 512, 768, 1024 },
243 .mclk_fs_num = 9,
244 }, {
245 /* Double speed mode */
246 .rate_min = 84000,
247 .rate_max = 100000,
248 .mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512,
249 768, 1024},
250 .mclk_fs_num = 7,
251 }
252 };
253
254 /* Es7154 has a separate supply for digital I/O */
255 static const struct snd_soc_dapm_widget es7154_extra_widgets[] = {
256 SND_SOC_DAPM_REGULATOR_SUPPLY("PVDD", 0, 0),
257 };
258
259 static const struct snd_soc_dapm_route es7154_extra_routes[] = {
260 { "Playback", NULL, "PVDD", }
261 };
262
263 static const struct es7134_chip es7154_chip __maybe_unused = {
264 .dai_drv = &es7154_dai,
265 .modes = es7154_modes,
266 .mode_num = ARRAY_SIZE(es7154_modes),
267 .extra_routes = es7154_extra_routes,
268 .extra_route_num = ARRAY_SIZE(es7154_extra_routes),
269 .extra_widgets = es7154_extra_widgets,
270 .extra_widget_num = ARRAY_SIZE(es7154_extra_widgets),
271 };
272
273 static int es7134_probe(struct platform_device *pdev)
274 {
275 struct device *dev = &pdev->dev;
276 struct es7134_data *priv;
277
278 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
279 if (!priv)
280 return -ENOMEM;
281 platform_set_drvdata(pdev, priv);
282
283 priv->chip = of_device_get_match_data(dev);
284 if (!priv->chip) {
285 dev_err(dev, "failed to match device\n");
286 return -ENODEV;
287 }
288
289 return devm_snd_soc_register_component(&pdev->dev,
290 &es7134_component_driver,
291 priv->chip->dai_drv, 1);
292 }
293
294 #ifdef CONFIG_OF
295 static const struct of_device_id es7134_ids[] = {
296 { .compatible = "everest,es7134", .data = &es7134_chip },
297 { .compatible = "everest,es7144", .data = &es7134_chip },
298 { .compatible = "everest,es7154", .data = &es7154_chip },
299 { }
300 };
301 MODULE_DEVICE_TABLE(of, es7134_ids);
302 #endif
303
304 static struct platform_driver es7134_driver = {
305 .driver = {
306 .name = "es7134",
307 .of_match_table = of_match_ptr(es7134_ids),
308 },
309 .probe = es7134_probe,
310 };
311
312 module_platform_driver(es7134_driver);
313
314 MODULE_DESCRIPTION("ASoC ES7134 audio codec driver");
315 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
316 MODULE_LICENSE("GPL");
317
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