1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 *  Cirrus Logic CS4341A ALSA SoC Codec Driver
4 *  Author: Alexander Shiyan <shc_work@mail.ru>
5 */
6
7#include <linux/i2c.h>
8#include <linux/module.h>
9#include <linux/of.h>
10#include <linux/regmap.h>
11#include <linux/spi/spi.h>
12
13#include <sound/pcm.h>
14#include <sound/pcm_params.h>
15#include <sound/soc.h>
16#include <sound/tlv.h>
17
18#define CS4341_REG_MODE1	0x00
19#define CS4341_REG_MODE2	0x01
20#define CS4341_REG_MIX		0x02
21#define CS4341_REG_VOLA		0x03
22#define CS4341_REG_VOLB		0x04
23
24#define CS4341_MODE2_DIF	(7 << 4)
25#define CS4341_MODE2_DIF_I2S_24	(0 << 4)
26#define CS4341_MODE2_DIF_I2S_16	(1 << 4)
27#define CS4341_MODE2_DIF_LJ_24	(2 << 4)
28#define CS4341_MODE2_DIF_RJ_24	(3 << 4)
29#define CS4341_MODE2_DIF_RJ_16	(5 << 4)
30#define CS4341_VOLX_MUTE	(1 << 7)
31
32struct cs4341_priv {
33	unsigned int		fmt;
34	struct regmap		*regmap;
35	struct regmap_config	regcfg;
36};
37
38static const struct reg_default cs4341_reg_defaults[] = {
39	{ CS4341_REG_MODE1,	0x00 },
40	{ CS4341_REG_MODE2,	0x82 },
41	{ CS4341_REG_MIX,	0x49 },
42	{ CS4341_REG_VOLA,	0x80 },
43	{ CS4341_REG_VOLB,	0x80 },
44};
45
46static int cs4341_set_fmt(struct snd_soc_dai *dai, unsigned int format)
47{
48	struct snd_soc_component *component = dai->component;
49	struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
50
51	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
52	case SND_SOC_DAIFMT_CBS_CFS:
53		break;
54	default:
55		return -EINVAL;
56	}
57
58	switch (format & SND_SOC_DAIFMT_INV_MASK) {
59	case SND_SOC_DAIFMT_NB_NF:
60		break;
61	default:
62		return -EINVAL;
63	}
64
65	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
66	case SND_SOC_DAIFMT_I2S:
67	case SND_SOC_DAIFMT_LEFT_J:
68	case SND_SOC_DAIFMT_RIGHT_J:
69		cs4341->fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
70		break;
71	default:
72		return -EINVAL;
73	}
74
75	return 0;
76}
77
78static int cs4341_hw_params(struct snd_pcm_substream *substream,
79			    struct snd_pcm_hw_params *params,
80			    struct snd_soc_dai *dai)
81{
82	struct snd_soc_component *component = dai->component;
83	struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component);
84	unsigned int mode = 0;
85	int b24 = 0;
86
87	switch (params_format(params)) {
88	case SNDRV_PCM_FORMAT_S24_LE:
89		b24 = 1;
90		break;
91	case SNDRV_PCM_FORMAT_S16_LE:
92		break;
93	default:
94		dev_err(component->dev, "Unsupported PCM format 0x%08x.\n",
95			params_format(params));
96		return -EINVAL;
97	}
98
99	switch (cs4341->fmt) {
100	case SND_SOC_DAIFMT_I2S:
101		mode = b24 ? CS4341_MODE2_DIF_I2S_24 : CS4341_MODE2_DIF_I2S_16;
102		break;
103	case SND_SOC_DAIFMT_LEFT_J:
104		mode = CS4341_MODE2_DIF_LJ_24;
105		break;
106	case SND_SOC_DAIFMT_RIGHT_J:
107		mode = b24 ? CS4341_MODE2_DIF_RJ_24 : CS4341_MODE2_DIF_RJ_16;
108		break;
109	default:
110		dev_err(component->dev, "Unsupported DAI format 0x%08x.\n",
111			cs4341->fmt);
112		return -EINVAL;
113	}
114
115	return snd_soc_component_update_bits(component, CS4341_REG_MODE2,
116					     CS4341_MODE2_DIF, mode);
117}
118
119static int cs4341_mute(struct snd_soc_dai *dai, int mute, int direction)
120{
121	struct snd_soc_component *component = dai->component;
122	int ret;
123
124	ret = snd_soc_component_update_bits(component, CS4341_REG_VOLA,
125					    CS4341_VOLX_MUTE,
126					    mute ? CS4341_VOLX_MUTE : 0);
127	if (ret < 0)
128		return ret;
129
130	return snd_soc_component_update_bits(component, CS4341_REG_VOLB,
131					     CS4341_VOLX_MUTE,
132					     mute ? CS4341_VOLX_MUTE : 0);
133}
134
135static DECLARE_TLV_DB_SCALE(out_tlv, -9000, 100, 0);
136
137static const char * const deemph[] = {
138	"None", "44.1k", "48k", "32k",
139};
140
141static const struct soc_enum deemph_enum =
142	SOC_ENUM_SINGLE(CS4341_REG_MODE2, 2, 4, deemph);
143
144static const char * const srzc[] = {
145	"Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
146};
147
148static const struct soc_enum srzc_enum =
149	SOC_ENUM_SINGLE(CS4341_REG_MIX, 5, 4, srzc);
150
151
152static const struct snd_soc_dapm_widget cs4341_dapm_widgets[] = {
153	SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
154	SND_SOC_DAPM_OUTPUT("OutA"),
155	SND_SOC_DAPM_OUTPUT("OutB"),
156};
157
158static const struct snd_soc_dapm_route cs4341_routes[] = {
159	{ "OutA", NULL, "HiFi DAC" },
160	{ "OutB", NULL, "HiFi DAC" },
161	{ "DAC Playback", NULL, "OutA" },
162	{ "DAC Playback", NULL, "OutB" },
163};
164
165static const struct snd_kcontrol_new cs4341_controls[] = {
166	SOC_DOUBLE_R_TLV("Master Playback Volume",
167			 CS4341_REG_VOLA, CS4341_REG_VOLB, 0, 90, 1, out_tlv),
168	SOC_ENUM("De-Emphasis Control", deemph_enum),
169	SOC_ENUM("Soft Ramp Zero Cross Control", srzc_enum),
170	SOC_SINGLE("Auto-Mute Switch", CS4341_REG_MODE2, 7, 1, 0),
171	SOC_SINGLE("Popguard Transient Switch", CS4341_REG_MODE2, 1, 1, 0),
172};
173
174static const struct snd_soc_dai_ops cs4341_dai_ops = {
175	.set_fmt	= cs4341_set_fmt,
176	.hw_params	= cs4341_hw_params,
177	.mute_stream	= cs4341_mute,
178	.no_capture_mute = 1,
179};
180
181static struct snd_soc_dai_driver cs4341_dai = {
182	.name			= "cs4341a-hifi",
183	.playback		= {
184		.stream_name	= "DAC Playback",
185		.channels_min	= 1,
186		.channels_max	= 2,
187		.rates		= SNDRV_PCM_RATE_8000_96000,
188		.formats	= SNDRV_PCM_FMTBIT_S16_LE |
189				  SNDRV_PCM_FMTBIT_S24_LE,
190	},
191	.ops			= &cs4341_dai_ops,
192	.symmetric_rate		= 1,
193};
194
195static const struct snd_soc_component_driver soc_component_cs4341 = {
196	.controls		= cs4341_controls,
197	.num_controls		= ARRAY_SIZE(cs4341_controls),
198	.dapm_widgets		= cs4341_dapm_widgets,
199	.num_dapm_widgets	= ARRAY_SIZE(cs4341_dapm_widgets),
200	.dapm_routes		= cs4341_routes,
201	.num_dapm_routes	= ARRAY_SIZE(cs4341_routes),
202	.idle_bias_on		= 1,
203	.use_pmdown_time	= 1,
204	.endianness		= 1,
205};
206
207static const struct of_device_id __maybe_unused cs4341_dt_ids[] = {
208	{ .compatible = "cirrus,cs4341a", },
209	{ }
210};
211MODULE_DEVICE_TABLE(of, cs4341_dt_ids);
212
213static int cs4341_probe(struct device *dev)
214{
215	struct cs4341_priv *cs4341 = dev_get_drvdata(dev);
216	int i;
217
218	for (i = 0; i < ARRAY_SIZE(cs4341_reg_defaults); i++)
219		regmap_write(cs4341->regmap, cs4341_reg_defaults[i].reg,
220			     cs4341_reg_defaults[i].def);
221
222	return devm_snd_soc_register_component(dev, &soc_component_cs4341,
223					       &cs4341_dai, 1);
224}
225
226#if IS_ENABLED(CONFIG_I2C)
227static int cs4341_i2c_probe(struct i2c_client *i2c)
228{
229	struct cs4341_priv *cs4341;
230
231	cs4341 = devm_kzalloc(&i2c->dev, sizeof(*cs4341), GFP_KERNEL);
232	if (!cs4341)
233		return -ENOMEM;
234
235	i2c_set_clientdata(i2c, cs4341);
236
237	cs4341->regcfg.reg_bits		= 8;
238	cs4341->regcfg.val_bits		= 8;
239	cs4341->regcfg.max_register	= CS4341_REG_VOLB;
240	cs4341->regcfg.cache_type	= REGCACHE_FLAT;
241	cs4341->regcfg.reg_defaults	= cs4341_reg_defaults;
242	cs4341->regcfg.num_reg_defaults	= ARRAY_SIZE(cs4341_reg_defaults);
243	cs4341->regmap = devm_regmap_init_i2c(i2c, &cs4341->regcfg);
244	if (IS_ERR(cs4341->regmap))
245		return PTR_ERR(cs4341->regmap);
246
247	return cs4341_probe(&i2c->dev);
248}
249
250static const struct i2c_device_id cs4341_i2c_id[] = {
251	{ "cs4341", 0 },
252	{ }
253};
254MODULE_DEVICE_TABLE(i2c, cs4341_i2c_id);
255
256static struct i2c_driver cs4341_i2c_driver = {
257	.driver = {
258		.name = "cs4341-i2c",
259		.of_match_table = of_match_ptr(cs4341_dt_ids),
260	},
261	.probe = cs4341_i2c_probe,
262	.id_table = cs4341_i2c_id,
263};
264#endif
265
266#if defined(CONFIG_SPI_MASTER)
267static bool cs4341_reg_readable(struct device *dev, unsigned int reg)
268{
269	return false;
270}
271
272static int cs4341_spi_probe(struct spi_device *spi)
273{
274	struct cs4341_priv *cs4341;
275	int ret;
276
277	cs4341 = devm_kzalloc(&spi->dev, sizeof(*cs4341), GFP_KERNEL);
278	if (!cs4341)
279		return -ENOMEM;
280
281	if (!spi->bits_per_word)
282		spi->bits_per_word = 8;
283	if (!spi->max_speed_hz)
284		spi->max_speed_hz = 6000000;
285	ret = spi_setup(spi);
286	if (ret)
287		return ret;
288
289	spi_set_drvdata(spi, cs4341);
290
291	cs4341->regcfg.reg_bits		= 16;
292	cs4341->regcfg.val_bits		= 8;
293	cs4341->regcfg.write_flag_mask	= 0x20;
294	cs4341->regcfg.max_register	= CS4341_REG_VOLB;
295	cs4341->regcfg.cache_type	= REGCACHE_FLAT;
296	cs4341->regcfg.readable_reg	= cs4341_reg_readable;
297	cs4341->regcfg.reg_defaults	= cs4341_reg_defaults;
298	cs4341->regcfg.num_reg_defaults	= ARRAY_SIZE(cs4341_reg_defaults);
299	cs4341->regmap = devm_regmap_init_spi(spi, &cs4341->regcfg);
300	if (IS_ERR(cs4341->regmap))
301		return PTR_ERR(cs4341->regmap);
302
303	return cs4341_probe(&spi->dev);
304}
305
306static const struct spi_device_id cs4341_spi_ids[] = {
307	{ "cs4341a" },
308	{ }
309};
310MODULE_DEVICE_TABLE(spi, cs4341_spi_ids);
311
312static struct spi_driver cs4341_spi_driver = {
313	.driver = {
314		.name = "cs4341-spi",
315		.of_match_table = of_match_ptr(cs4341_dt_ids),
316	},
317	.probe = cs4341_spi_probe,
318	.id_table = cs4341_spi_ids,
319};
320#endif
321
322static int __init cs4341_init(void)
323{
324	int ret = 0;
325
326#if IS_ENABLED(CONFIG_I2C)
327	ret = i2c_add_driver(&cs4341_i2c_driver);
328	if (ret)
329		return ret;
330#endif
331#if defined(CONFIG_SPI_MASTER)
332	ret = spi_register_driver(&cs4341_spi_driver);
333#endif
334
335	return ret;
336}
337module_init(cs4341_init);
338
339static void __exit cs4341_exit(void)
340{
341#if IS_ENABLED(CONFIG_I2C)
342	i2c_del_driver(&cs4341_i2c_driver);
343#endif
344#if defined(CONFIG_SPI_MASTER)
345	spi_unregister_driver(&cs4341_spi_driver);
346#endif
347}
348module_exit(cs4341_exit);
349
350MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
351MODULE_DESCRIPTION("Cirrus Logic CS4341 ALSA SoC Codec Driver");
352MODULE_LICENSE("GPL");
353