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 */
23struct 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
31static const struct snd_soc_dapm_widget uda1334_dapm_widgets[] = {
32SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
33SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
34SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
35};
36
37static const struct snd_soc_dapm_route uda1334_dapm_routes[] = {
38	{ "LINEVOUTL", NULL, "DAC" },
39	{ "LINEVOUTR", NULL, "DAC" },
40};
41
42static 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
57static 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
73static 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
78static 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
90static 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
115static 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
124static 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
169static 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
183static 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
197static 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
205static 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
217static 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
228static 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
241static const struct of_device_id uda1334_of_match[] = {
242	{ .compatible = "nxp,uda1334" },
243	{ /* sentinel*/ }
244};
245MODULE_DEVICE_TABLE(of, uda1334_of_match);
246
247static 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
282static 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};
289module_platform_driver(uda1334_codec_driver);
290
291MODULE_DESCRIPTION("ASoC UDA1334 driver");
292MODULE_AUTHOR("Andra Danciu <andradanciu1997@gmail.com>");
293MODULE_ALIAS("platform:uda1334-codec");
294MODULE_LICENSE("GPL v2");
295