1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sound/soc/codecs/si476x.c -- Codec driver for SI476X chips
4 *
5 * Copyright (C) 2012 Innovative Converged Devices(ICD)
6 * Copyright (C) 2013 Andrey Smirnov
7 *
8 * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
9 */
10
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <sound/pcm.h>
14#include <sound/pcm_params.h>
15#include <linux/regmap.h>
16#include <sound/soc.h>
17#include <sound/initval.h>
18
19#include <linux/i2c.h>
20
21#include <linux/mfd/si476x-core.h>
22
23enum si476x_audio_registers {
24	SI476X_DIGITAL_IO_OUTPUT_FORMAT		= 0x0203,
25	SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE	= 0x0202,
26};
27
28enum si476x_digital_io_output_format {
29	SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT	= 11,
30	SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT	= 8,
31};
32
33#define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK	((0x7 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
34						  (0x7 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
35#define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK	(0x7e)
36
37enum si476x_daudio_formats {
38	SI476X_DAUDIO_MODE_I2S		= (0x0 << 1),
39	SI476X_DAUDIO_MODE_DSP_A	= (0x6 << 1),
40	SI476X_DAUDIO_MODE_DSP_B	= (0x7 << 1),
41	SI476X_DAUDIO_MODE_LEFT_J	= (0x8 << 1),
42	SI476X_DAUDIO_MODE_RIGHT_J	= (0x9 << 1),
43
44	SI476X_DAUDIO_MODE_IB		= (1 << 5),
45	SI476X_DAUDIO_MODE_IF		= (1 << 6),
46};
47
48enum si476x_pcm_format {
49	SI476X_PCM_FORMAT_S8		= 2,
50	SI476X_PCM_FORMAT_S16_LE	= 4,
51	SI476X_PCM_FORMAT_S20_3LE	= 5,
52	SI476X_PCM_FORMAT_S24_LE	= 6,
53};
54
55static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = {
56SND_SOC_DAPM_OUTPUT("LOUT"),
57SND_SOC_DAPM_OUTPUT("ROUT"),
58};
59
60static const struct snd_soc_dapm_route si476x_dapm_routes[] = {
61	{ "Capture", NULL, "LOUT" },
62	{ "Capture", NULL, "ROUT" },
63};
64
65static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
66				    unsigned int fmt)
67{
68	struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev);
69	int err;
70	u16 format = 0;
71
72	if ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC)
73		return -EINVAL;
74
75	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
76	case SND_SOC_DAIFMT_DSP_A:
77		format |= SI476X_DAUDIO_MODE_DSP_A;
78		break;
79	case SND_SOC_DAIFMT_DSP_B:
80		format |= SI476X_DAUDIO_MODE_DSP_B;
81		break;
82	case SND_SOC_DAIFMT_I2S:
83		format |= SI476X_DAUDIO_MODE_I2S;
84		break;
85	case SND_SOC_DAIFMT_RIGHT_J:
86		format |= SI476X_DAUDIO_MODE_RIGHT_J;
87		break;
88	case SND_SOC_DAIFMT_LEFT_J:
89		format |= SI476X_DAUDIO_MODE_LEFT_J;
90		break;
91	default:
92		return -EINVAL;
93	}
94
95	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
96	case SND_SOC_DAIFMT_DSP_A:
97	case SND_SOC_DAIFMT_DSP_B:
98		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
99		case SND_SOC_DAIFMT_NB_NF:
100			break;
101		case SND_SOC_DAIFMT_IB_NF:
102			format |= SI476X_DAUDIO_MODE_IB;
103			break;
104		default:
105			return -EINVAL;
106		}
107		break;
108	case SND_SOC_DAIFMT_I2S:
109	case SND_SOC_DAIFMT_RIGHT_J:
110	case SND_SOC_DAIFMT_LEFT_J:
111		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
112		case SND_SOC_DAIFMT_NB_NF:
113			break;
114		case SND_SOC_DAIFMT_IB_IF:
115			format |= SI476X_DAUDIO_MODE_IB |
116				SI476X_DAUDIO_MODE_IF;
117			break;
118		case SND_SOC_DAIFMT_IB_NF:
119			format |= SI476X_DAUDIO_MODE_IB;
120			break;
121		case SND_SOC_DAIFMT_NB_IF:
122			format |= SI476X_DAUDIO_MODE_IF;
123			break;
124		default:
125			return -EINVAL;
126		}
127		break;
128	default:
129		return -EINVAL;
130	}
131
132	si476x_core_lock(core);
133
134	err = snd_soc_component_update_bits(codec_dai->component, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
135				  SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
136				  format);
137
138	si476x_core_unlock(core);
139
140	if (err < 0) {
141		dev_err(codec_dai->component->dev, "Failed to set output format\n");
142		return err;
143	}
144
145	return 0;
146}
147
148static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
149				  struct snd_pcm_hw_params *params,
150				  struct snd_soc_dai *dai)
151{
152	struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev);
153	int rate, width, err;
154
155	rate = params_rate(params);
156	if (rate < 32000 || rate > 48000) {
157		dev_err(dai->component->dev, "Rate: %d is not supported\n", rate);
158		return -EINVAL;
159	}
160
161	switch (params_width(params)) {
162	case 8:
163		width = SI476X_PCM_FORMAT_S8;
164		break;
165	case 16:
166		width = SI476X_PCM_FORMAT_S16_LE;
167		break;
168	case 20:
169		width = SI476X_PCM_FORMAT_S20_3LE;
170		break;
171	case 24:
172		width = SI476X_PCM_FORMAT_S24_LE;
173		break;
174	default:
175		return -EINVAL;
176	}
177
178	si476x_core_lock(core);
179
180	err = snd_soc_component_write(dai->component, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
181			    rate);
182	if (err < 0) {
183		dev_err(dai->component->dev, "Failed to set sample rate\n");
184		goto out;
185	}
186
187	err = snd_soc_component_update_bits(dai->component, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
188				  SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
189				  (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
190				  (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
191	if (err < 0) {
192		dev_err(dai->component->dev, "Failed to set output width\n");
193		goto out;
194	}
195
196out:
197	si476x_core_unlock(core);
198
199	return err;
200}
201
202static const struct snd_soc_dai_ops si476x_dai_ops = {
203	.hw_params	= si476x_codec_hw_params,
204	.set_fmt	= si476x_codec_set_dai_fmt,
205};
206
207static struct snd_soc_dai_driver si476x_dai = {
208	.name		= "si476x-codec",
209	.capture	= {
210		.stream_name	= "Capture",
211		.channels_min	= 2,
212		.channels_max	= 2,
213
214		.rates = SNDRV_PCM_RATE_32000 |
215		SNDRV_PCM_RATE_44100 |
216		SNDRV_PCM_RATE_48000,
217		.formats = SNDRV_PCM_FMTBIT_S8 |
218		SNDRV_PCM_FMTBIT_S16_LE |
219		SNDRV_PCM_FMTBIT_S20_3LE |
220		SNDRV_PCM_FMTBIT_S24_LE
221	},
222	.ops		= &si476x_dai_ops,
223};
224
225static int si476x_probe(struct snd_soc_component *component)
226{
227	snd_soc_component_init_regmap(component,
228				dev_get_regmap(component->dev->parent, NULL));
229
230	return 0;
231}
232
233static const struct snd_soc_component_driver soc_component_dev_si476x = {
234	.probe			= si476x_probe,
235	.dapm_widgets		= si476x_dapm_widgets,
236	.num_dapm_widgets	= ARRAY_SIZE(si476x_dapm_widgets),
237	.dapm_routes		= si476x_dapm_routes,
238	.num_dapm_routes	= ARRAY_SIZE(si476x_dapm_routes),
239	.idle_bias_on		= 1,
240	.use_pmdown_time	= 1,
241	.endianness		= 1,
242};
243
244static int si476x_platform_probe(struct platform_device *pdev)
245{
246	return devm_snd_soc_register_component(&pdev->dev,
247				      &soc_component_dev_si476x,
248				      &si476x_dai, 1);
249}
250
251MODULE_ALIAS("platform:si476x-codec");
252
253static struct platform_driver si476x_platform_driver = {
254	.driver		= {
255		.name	= "si476x-codec",
256	},
257	.probe		= si476x_platform_probe,
258};
259module_platform_driver(si476x_platform_driver);
260
261MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
262MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
263MODULE_LICENSE("GPL");
264