1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * cs4349.c -- CS4349 ALSA Soc Audio driver
4 *
5 * Copyright 2015 Cirrus Logic, Inc.
6 *
7 * Authors: Tim Howe <Tim.Howe@cirrus.com>
8 */
9
10 #include <linux/mod_devicetable.h>
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/gpio/consumer.h>
17 #include <linux/platform_device.h>
18 #include <linux/pm.h>
19 #include <linux/i2c.h>
20 #include <linux/regmap.h>
21 #include <linux/slab.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dapm.h>
27 #include <sound/initval.h>
28 #include <sound/tlv.h>
29 #include "cs4349.h"
30
31
32 static const struct reg_default cs4349_reg_defaults[] = {
33 { 2, 0x00 }, /* r02 - Mode Control */
34 { 3, 0x09 }, /* r03 - Volume, Mixing and Inversion Control */
35 { 4, 0x81 }, /* r04 - Mute Control */
36 { 5, 0x00 }, /* r05 - Channel A Volume Control */
37 { 6, 0x00 }, /* r06 - Channel B Volume Control */
38 { 7, 0xB1 }, /* r07 - Ramp and Filter Control */
39 { 8, 0x1C }, /* r08 - Misc. Control */
40 };
41
42 /* Private data for the CS4349 */
43 struct cs4349_private {
44 struct regmap *regmap;
45 struct gpio_desc *reset_gpio;
46 unsigned int mode;
47 int rate;
48 };
49
cs4349_readable_register(struct device * dev,unsigned int reg)50 static bool cs4349_readable_register(struct device *dev, unsigned int reg)
51 {
52 switch (reg) {
53 case CS4349_CHIPID ... CS4349_MISC:
54 return true;
55 default:
56 return false;
57 }
58 }
59
cs4349_writeable_register(struct device * dev,unsigned int reg)60 static bool cs4349_writeable_register(struct device *dev, unsigned int reg)
61 {
62 switch (reg) {
63 case CS4349_MODE ... CS4349_MISC:
64 return true;
65 default:
66 return false;
67 }
68 }
69
cs4349_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int format)70 static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai,
71 unsigned int format)
72 {
73 struct snd_soc_component *component = codec_dai->component;
74 struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component);
75 unsigned int fmt;
76
77 fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
78
79 switch (fmt) {
80 case SND_SOC_DAIFMT_I2S:
81 case SND_SOC_DAIFMT_LEFT_J:
82 case SND_SOC_DAIFMT_RIGHT_J:
83 cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
84 break;
85 default:
86 return -EINVAL;
87 }
88
89 return 0;
90 }
91
cs4349_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)92 static int cs4349_pcm_hw_params(struct snd_pcm_substream *substream,
93 struct snd_pcm_hw_params *params,
94 struct snd_soc_dai *dai)
95 {
96 struct snd_soc_component *component = dai->component;
97 struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component);
98 int fmt, ret;
99
100 cs4349->rate = params_rate(params);
101
102 switch (cs4349->mode) {
103 case SND_SOC_DAIFMT_I2S:
104 fmt = DIF_I2S;
105 break;
106 case SND_SOC_DAIFMT_LEFT_J:
107 fmt = DIF_LEFT_JST;
108 break;
109 case SND_SOC_DAIFMT_RIGHT_J:
110 switch (params_width(params)) {
111 case 16:
112 fmt = DIF_RGHT_JST16;
113 break;
114 case 24:
115 fmt = DIF_RGHT_JST24;
116 break;
117 default:
118 return -EINVAL;
119 }
120 break;
121 default:
122 return -EINVAL;
123 }
124
125 ret = snd_soc_component_update_bits(component, CS4349_MODE, DIF_MASK,
126 MODE_FORMAT(fmt));
127 if (ret < 0)
128 return ret;
129
130 return 0;
131 }
132
cs4349_mute(struct snd_soc_dai * dai,int mute,int direction)133 static int cs4349_mute(struct snd_soc_dai *dai, int mute, int direction)
134 {
135 struct snd_soc_component *component = dai->component;
136 int reg;
137
138 reg = 0;
139 if (mute)
140 reg = MUTE_AB_MASK;
141
142 return snd_soc_component_update_bits(component, CS4349_MUTE, MUTE_AB_MASK, reg);
143 }
144
145 static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0);
146
147 static const char * const chan_mix_texts[] = {
148 "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB",
149 "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL",
150 "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono",
151 /*Normal == Channel A = Left, Channel B = Right*/
152 };
153
154 static const char * const fm_texts[] = {
155 "Auto", "Single", "Double", "Quad",
156 };
157
158 static const char * const deemph_texts[] = {
159 "None", "44.1k", "48k", "32k",
160 };
161
162 static const char * const softr_zeroc_texts[] = {
163 "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
164 };
165
166 static int deemph_values[] = {
167 0, 4, 8, 12,
168 };
169
170 static int softr_zeroc_values[] = {
171 0, 64, 128, 192,
172 };
173
174 static const struct soc_enum chan_mix_enum =
175 SOC_ENUM_SINGLE(CS4349_VMI, 0,
176 ARRAY_SIZE(chan_mix_texts),
177 chan_mix_texts);
178
179 static const struct soc_enum fm_mode_enum =
180 SOC_ENUM_SINGLE(CS4349_MODE, 0,
181 ARRAY_SIZE(fm_texts),
182 fm_texts);
183
184 static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK,
185 deemph_texts, deemph_values);
186
187 static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0,
188 SR_ZC_MASK, softr_zeroc_texts,
189 softr_zeroc_values);
190
191 static const struct snd_kcontrol_new cs4349_snd_controls[] = {
192 SOC_DOUBLE_R_TLV("Master Playback Volume",
193 CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv),
194 SOC_ENUM("Functional Mode", fm_mode_enum),
195 SOC_ENUM("De-Emphasis Control", deemph_enum),
196 SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum),
197 SOC_ENUM("Channel Mixer", chan_mix_enum),
198 SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0),
199 SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0),
200 SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0),
201 SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0),
202 SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0),
203 SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0),
204 SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0),
205 SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0),
206 SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0),
207 SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0),
208 };
209
210 static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = {
211 SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
212
213 SND_SOC_DAPM_OUTPUT("OutputA"),
214 SND_SOC_DAPM_OUTPUT("OutputB"),
215 };
216
217 static const struct snd_soc_dapm_route cs4349_routes[] = {
218 {"DAC Playback", NULL, "OutputA"},
219 {"DAC Playback", NULL, "OutputB"},
220
221 {"OutputA", NULL, "HiFi DAC"},
222 {"OutputB", NULL, "HiFi DAC"},
223 };
224
225 #define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
226 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE | \
227 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE | \
228 SNDRV_PCM_FMTBIT_S32_LE)
229
230 #define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000
231
232 static const struct snd_soc_dai_ops cs4349_dai_ops = {
233 .hw_params = cs4349_pcm_hw_params,
234 .set_fmt = cs4349_set_dai_fmt,
235 .mute_stream = cs4349_mute,
236 .no_capture_mute = 1,
237 };
238
239 static struct snd_soc_dai_driver cs4349_dai = {
240 .name = "cs4349_hifi",
241 .playback = {
242 .stream_name = "DAC Playback",
243 .channels_min = 1,
244 .channels_max = 2,
245 .rates = CS4349_PCM_RATES,
246 .formats = CS4349_PCM_FORMATS,
247 },
248 .ops = &cs4349_dai_ops,
249 .symmetric_rate = 1,
250 };
251
252 static const struct snd_soc_component_driver soc_component_dev_cs4349 = {
253 .controls = cs4349_snd_controls,
254 .num_controls = ARRAY_SIZE(cs4349_snd_controls),
255 .dapm_widgets = cs4349_dapm_widgets,
256 .num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets),
257 .dapm_routes = cs4349_routes,
258 .num_dapm_routes = ARRAY_SIZE(cs4349_routes),
259 .idle_bias_on = 1,
260 .use_pmdown_time = 1,
261 .endianness = 1,
262 };
263
264 static const struct regmap_config cs4349_regmap = {
265 .reg_bits = 8,
266 .val_bits = 8,
267
268 .max_register = CS4349_MISC,
269 .reg_defaults = cs4349_reg_defaults,
270 .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults),
271 .readable_reg = cs4349_readable_register,
272 .writeable_reg = cs4349_writeable_register,
273 .cache_type = REGCACHE_MAPLE,
274 };
275
cs4349_i2c_probe(struct i2c_client * client)276 static int cs4349_i2c_probe(struct i2c_client *client)
277 {
278 struct cs4349_private *cs4349;
279 int ret;
280
281 cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL);
282 if (!cs4349)
283 return -ENOMEM;
284
285 cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap);
286 if (IS_ERR(cs4349->regmap)) {
287 ret = PTR_ERR(cs4349->regmap);
288 dev_err(&client->dev, "regmap_init() failed: %d\n", ret);
289 return ret;
290 }
291
292 /* Reset the Device */
293 cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev,
294 "reset", GPIOD_OUT_LOW);
295 if (IS_ERR(cs4349->reset_gpio))
296 return PTR_ERR(cs4349->reset_gpio);
297
298 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
299
300 i2c_set_clientdata(client, cs4349);
301
302 return devm_snd_soc_register_component(&client->dev,
303 &soc_component_dev_cs4349,
304 &cs4349_dai, 1);
305 }
306
cs4349_i2c_remove(struct i2c_client * client)307 static void cs4349_i2c_remove(struct i2c_client *client)
308 {
309 struct cs4349_private *cs4349 = i2c_get_clientdata(client);
310
311 /* Hold down reset */
312 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
313 }
314
315 #ifdef CONFIG_PM
cs4349_runtime_suspend(struct device * dev)316 static int cs4349_runtime_suspend(struct device *dev)
317 {
318 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
319 int ret;
320
321 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN);
322 if (ret < 0)
323 return ret;
324
325 regcache_cache_only(cs4349->regmap, true);
326
327 /* Hold down reset */
328 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
329
330 return 0;
331 }
332
cs4349_runtime_resume(struct device * dev)333 static int cs4349_runtime_resume(struct device *dev)
334 {
335 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
336 int ret;
337
338 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0);
339 if (ret < 0)
340 return ret;
341
342 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
343
344 regcache_cache_only(cs4349->regmap, false);
345 regcache_sync(cs4349->regmap);
346
347 return 0;
348 }
349 #endif
350
351 static const struct dev_pm_ops cs4349_runtime_pm = {
352 SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume,
353 NULL)
354 };
355
356 static const struct of_device_id cs4349_of_match[] = {
357 { .compatible = "cirrus,cs4349", },
358 {},
359 };
360
361 MODULE_DEVICE_TABLE(of, cs4349_of_match);
362
363 static const struct i2c_device_id cs4349_i2c_id[] = {
364 {"cs4349"},
365 {}
366 };
367
368 MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id);
369
370 static struct i2c_driver cs4349_i2c_driver = {
371 .driver = {
372 .name = "cs4349",
373 .of_match_table = cs4349_of_match,
374 .pm = &cs4349_runtime_pm,
375 },
376 .id_table = cs4349_i2c_id,
377 .probe = cs4349_i2c_probe,
378 .remove = cs4349_i2c_remove,
379 };
380
381 module_i2c_driver(cs4349_i2c_driver);
382
383 MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>");
384 MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver");
385 MODULE_LICENSE("GPL");
386