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
15struct 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
22struct 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
32struct es7134_data {
33	unsigned int mclk;
34	const struct es7134_chip *chip;
35};
36
37static 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
65static 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
78static 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
91static 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_CBS_CFS)) {
98		dev_err(codec_dai->dev, "Invalid DAI format\n");
99		return -EINVAL;
100	}
101
102	return 0;
103}
104
105static 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
133static 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
139static 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
159static 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 */
182static const struct snd_soc_dapm_route es7134_extra_routes[] = {
183	{ "Playback", NULL, "VDD", }
184};
185
186static const struct es7134_chip es7134_chip = {
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
194static 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
201static const struct snd_soc_dapm_route es7134_dapm_routes[] = {
202	{ "AOUTL", NULL, "DAC" },
203	{ "AOUTR", NULL, "DAC" },
204	{ "DAC", NULL, "VDD" },
205};
206
207static 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	.non_legacy_dai_naming	= 1,
217};
218
219static struct snd_soc_dai_driver es7154_dai = {
220	.name = "es7154-hifi",
221	.playback = {
222		.stream_name = "Playback",
223		.channels_min = 2,
224		.channels_max = 2,
225		.rates = (SNDRV_PCM_RATE_8000_48000 |
226			  SNDRV_PCM_RATE_88200      |
227			  SNDRV_PCM_RATE_96000),
228		.formats = (SNDRV_PCM_FMTBIT_S16_LE  |
229			    SNDRV_PCM_FMTBIT_S18_3LE |
230			    SNDRV_PCM_FMTBIT_S20_3LE |
231			    SNDRV_PCM_FMTBIT_S24_3LE |
232			    SNDRV_PCM_FMTBIT_S24_LE),
233	},
234	.ops = &es7134_dai_ops,
235};
236
237static const struct es7134_clock_mode es7154_modes[] = {
238	{
239		/* Single speed mode */
240		.rate_min = 8000,
241		.rate_max = 50000,
242		.mclk_fs = (unsigned int[]) { 32, 64, 128, 192, 256,
243					      384, 512, 768, 1024 },
244		.mclk_fs_num = 9,
245	}, {
246		/* Double speed mode */
247		.rate_min = 84000,
248		.rate_max = 100000,
249		.mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512,
250					      768, 1024},
251		.mclk_fs_num = 7,
252	}
253};
254
255/* Es7154 has a separate supply for digital I/O  */
256static const struct snd_soc_dapm_widget es7154_extra_widgets[] = {
257	SND_SOC_DAPM_REGULATOR_SUPPLY("PVDD", 0, 0),
258};
259
260static const struct snd_soc_dapm_route es7154_extra_routes[] = {
261	{ "Playback", NULL, "PVDD", }
262};
263
264static const struct es7134_chip es7154_chip = {
265	.dai_drv = &es7154_dai,
266	.modes = es7154_modes,
267	.mode_num = ARRAY_SIZE(es7154_modes),
268	.extra_routes = es7154_extra_routes,
269	.extra_route_num = ARRAY_SIZE(es7154_extra_routes),
270	.extra_widgets = es7154_extra_widgets,
271	.extra_widget_num = ARRAY_SIZE(es7154_extra_widgets),
272};
273
274static int es7134_probe(struct platform_device *pdev)
275{
276	struct device *dev = &pdev->dev;
277	struct es7134_data *priv;
278
279	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
280	if (!priv)
281		return -ENOMEM;
282	platform_set_drvdata(pdev, priv);
283
284	priv->chip = of_device_get_match_data(dev);
285	if (!priv->chip) {
286		dev_err(dev, "failed to match device\n");
287		return -ENODEV;
288	}
289
290	return devm_snd_soc_register_component(&pdev->dev,
291				      &es7134_component_driver,
292				      priv->chip->dai_drv, 1);
293}
294
295#ifdef CONFIG_OF
296static const struct of_device_id es7134_ids[] = {
297	{ .compatible = "everest,es7134", .data = &es7134_chip },
298	{ .compatible = "everest,es7144", .data = &es7134_chip },
299	{ .compatible = "everest,es7154", .data = &es7154_chip },
300	{ }
301};
302MODULE_DEVICE_TABLE(of, es7134_ids);
303#endif
304
305static struct platform_driver es7134_driver = {
306	.driver = {
307		.name = "es7134",
308		.of_match_table = of_match_ptr(es7134_ids),
309	},
310	.probe = es7134_probe,
311};
312
313module_platform_driver(es7134_driver);
314
315MODULE_DESCRIPTION("ASoC ES7134 audio codec driver");
316MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
317MODULE_LICENSE("GPL");
318