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10#include <linux/module.h>
11#include <linux/moduleparam.h>
12#include <linux/kernel.h>
13#include <linux/init.h>
14#include <linux/delay.h>
15#include <linux/gpio.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/of_device.h>
21#include <linux/regmap.h>
22#include <linux/slab.h>
23#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/pcm_params.h>
26#include <sound/soc.h>
27#include <sound/soc-dapm.h>
28#include <sound/initval.h>
29#include <sound/tlv.h>
30#include "cs4349.h"
31
32
33static const struct reg_default cs4349_reg_defaults[] = {
34 { 2, 0x00 },
35 { 3, 0x09 },
36 { 4, 0x81 },
37 { 5, 0x00 },
38 { 6, 0x00 },
39 { 7, 0xB1 },
40 { 8, 0x1C },
41};
42
43
44struct cs4349_private {
45 struct regmap *regmap;
46 struct gpio_desc *reset_gpio;
47 unsigned int mode;
48 int rate;
49};
50
51static bool cs4349_readable_register(struct device *dev, unsigned int reg)
52{
53 switch (reg) {
54 case CS4349_CHIPID ... CS4349_MISC:
55 return true;
56 default:
57 return false;
58 }
59}
60
61static bool cs4349_writeable_register(struct device *dev, unsigned int reg)
62{
63 switch (reg) {
64 case CS4349_MODE ... CS4349_MISC:
65 return true;
66 default:
67 return false;
68 }
69}
70
71static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai,
72 unsigned int format)
73{
74 struct snd_soc_component *component = codec_dai->component;
75 struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component);
76 unsigned int fmt;
77
78 fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
79
80 switch (fmt) {
81 case SND_SOC_DAIFMT_I2S:
82 case SND_SOC_DAIFMT_LEFT_J:
83 case SND_SOC_DAIFMT_RIGHT_J:
84 cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
85 break;
86 default:
87 return -EINVAL;
88 }
89
90 return 0;
91}
92
93static int cs4349_pcm_hw_params(struct snd_pcm_substream *substream,
94 struct snd_pcm_hw_params *params,
95 struct snd_soc_dai *dai)
96{
97 struct snd_soc_component *component = dai->component;
98 struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component);
99 int fmt, ret;
100
101 cs4349->rate = params_rate(params);
102
103 switch (cs4349->mode) {
104 case SND_SOC_DAIFMT_I2S:
105 fmt = DIF_I2S;
106 break;
107 case SND_SOC_DAIFMT_LEFT_J:
108 fmt = DIF_LEFT_JST;
109 break;
110 case SND_SOC_DAIFMT_RIGHT_J:
111 switch (params_width(params)) {
112 case 16:
113 fmt = DIF_RGHT_JST16;
114 break;
115 case 24:
116 fmt = DIF_RGHT_JST24;
117 break;
118 default:
119 return -EINVAL;
120 }
121 break;
122 default:
123 return -EINVAL;
124 }
125
126 ret = snd_soc_component_update_bits(component, CS4349_MODE, DIF_MASK,
127 MODE_FORMAT(fmt));
128 if (ret < 0)
129 return ret;
130
131 return 0;
132}
133
134static int cs4349_mute(struct snd_soc_dai *dai, int mute, int direction)
135{
136 struct snd_soc_component *component = dai->component;
137 int reg;
138
139 reg = 0;
140 if (mute)
141 reg = MUTE_AB_MASK;
142
143 return snd_soc_component_update_bits(component, CS4349_MUTE, MUTE_AB_MASK, reg);
144}
145
146static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0);
147
148static const char * const chan_mix_texts[] = {
149 "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB",
150 "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL",
151 "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono",
152
153};
154
155static const char * const fm_texts[] = {
156 "Auto", "Single", "Double", "Quad",
157};
158
159static const char * const deemph_texts[] = {
160 "None", "44.1k", "48k", "32k",
161};
162
163static const char * const softr_zeroc_texts[] = {
164 "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
165};
166
167static int deemph_values[] = {
168 0, 4, 8, 12,
169};
170
171static int softr_zeroc_values[] = {
172 0, 64, 128, 192,
173};
174
175static const struct soc_enum chan_mix_enum =
176 SOC_ENUM_SINGLE(CS4349_VMI, 0,
177 ARRAY_SIZE(chan_mix_texts),
178 chan_mix_texts);
179
180static const struct soc_enum fm_mode_enum =
181 SOC_ENUM_SINGLE(CS4349_MODE, 0,
182 ARRAY_SIZE(fm_texts),
183 fm_texts);
184
185static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK,
186 deemph_texts, deemph_values);
187
188static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0,
189 SR_ZC_MASK, softr_zeroc_texts,
190 softr_zeroc_values);
191
192static const struct snd_kcontrol_new cs4349_snd_controls[] = {
193 SOC_DOUBLE_R_TLV("Master Playback Volume",
194 CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv),
195 SOC_ENUM("Functional Mode", fm_mode_enum),
196 SOC_ENUM("De-Emphasis Control", deemph_enum),
197 SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum),
198 SOC_ENUM("Channel Mixer", chan_mix_enum),
199 SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0),
200 SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0),
201 SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0),
202 SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0),
203 SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0),
204 SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0),
205 SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0),
206 SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0),
207 SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0),
208 SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0),
209};
210
211static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = {
212 SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
213
214 SND_SOC_DAPM_OUTPUT("OutputA"),
215 SND_SOC_DAPM_OUTPUT("OutputB"),
216};
217
218static const struct snd_soc_dapm_route cs4349_routes[] = {
219 {"DAC Playback", NULL, "OutputA"},
220 {"DAC Playback", NULL, "OutputB"},
221
222 {"OutputA", NULL, "HiFi DAC"},
223 {"OutputB", NULL, "HiFi DAC"},
224};
225
226#define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
227 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
228 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
229 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
230 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \
231 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \
232 SNDRV_PCM_FMTBIT_S32_LE)
233
234#define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000
235
236static const struct snd_soc_dai_ops cs4349_dai_ops = {
237 .hw_params = cs4349_pcm_hw_params,
238 .set_fmt = cs4349_set_dai_fmt,
239 .mute_stream = cs4349_mute,
240 .no_capture_mute = 1,
241};
242
243static struct snd_soc_dai_driver cs4349_dai = {
244 .name = "cs4349_hifi",
245 .playback = {
246 .stream_name = "DAC Playback",
247 .channels_min = 1,
248 .channels_max = 2,
249 .rates = CS4349_PCM_RATES,
250 .formats = CS4349_PCM_FORMATS,
251 },
252 .ops = &cs4349_dai_ops,
253 .symmetric_rate = 1,
254};
255
256static const struct snd_soc_component_driver soc_component_dev_cs4349 = {
257 .controls = cs4349_snd_controls,
258 .num_controls = ARRAY_SIZE(cs4349_snd_controls),
259 .dapm_widgets = cs4349_dapm_widgets,
260 .num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets),
261 .dapm_routes = cs4349_routes,
262 .num_dapm_routes = ARRAY_SIZE(cs4349_routes),
263 .idle_bias_on = 1,
264 .use_pmdown_time = 1,
265 .endianness = 1,
266 .non_legacy_dai_naming = 1,
267};
268
269static const struct regmap_config cs4349_regmap = {
270 .reg_bits = 8,
271 .val_bits = 8,
272
273 .max_register = CS4349_MISC,
274 .reg_defaults = cs4349_reg_defaults,
275 .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults),
276 .readable_reg = cs4349_readable_register,
277 .writeable_reg = cs4349_writeable_register,
278 .cache_type = REGCACHE_RBTREE,
279};
280
281static int cs4349_i2c_probe(struct i2c_client *client,
282 const struct i2c_device_id *id)
283{
284 struct cs4349_private *cs4349;
285 int ret;
286
287 cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL);
288 if (!cs4349)
289 return -ENOMEM;
290
291 cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap);
292 if (IS_ERR(cs4349->regmap)) {
293 ret = PTR_ERR(cs4349->regmap);
294 dev_err(&client->dev, "regmap_init() failed: %d\n", ret);
295 return ret;
296 }
297
298
299 cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev,
300 "reset", GPIOD_OUT_LOW);
301 if (IS_ERR(cs4349->reset_gpio))
302 return PTR_ERR(cs4349->reset_gpio);
303
304 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
305
306 i2c_set_clientdata(client, cs4349);
307
308 return devm_snd_soc_register_component(&client->dev,
309 &soc_component_dev_cs4349,
310 &cs4349_dai, 1);
311}
312
313static int cs4349_i2c_remove(struct i2c_client *client)
314{
315 struct cs4349_private *cs4349 = i2c_get_clientdata(client);
316
317
318 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
319
320 return 0;
321}
322
323#ifdef CONFIG_PM
324static int cs4349_runtime_suspend(struct device *dev)
325{
326 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
327 int ret;
328
329 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN);
330 if (ret < 0)
331 return ret;
332
333 regcache_cache_only(cs4349->regmap, true);
334
335
336 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
337
338 return 0;
339}
340
341static int cs4349_runtime_resume(struct device *dev)
342{
343 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
344 int ret;
345
346 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0);
347 if (ret < 0)
348 return ret;
349
350 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
351
352 regcache_cache_only(cs4349->regmap, false);
353 regcache_sync(cs4349->regmap);
354
355 return 0;
356}
357#endif
358
359static const struct dev_pm_ops cs4349_runtime_pm = {
360 SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume,
361 NULL)
362};
363
364static const struct of_device_id cs4349_of_match[] = {
365 { .compatible = "cirrus,cs4349", },
366 {},
367};
368
369MODULE_DEVICE_TABLE(of, cs4349_of_match);
370
371static const struct i2c_device_id cs4349_i2c_id[] = {
372 {"cs4349", 0},
373 {}
374};
375
376MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id);
377
378static struct i2c_driver cs4349_i2c_driver = {
379 .driver = {
380 .name = "cs4349",
381 .of_match_table = cs4349_of_match,
382 .pm = &cs4349_runtime_pm,
383 },
384 .id_table = cs4349_i2c_id,
385 .probe = cs4349_i2c_probe,
386 .remove = cs4349_i2c_remove,
387};
388
389module_i2c_driver(cs4349_i2c_driver);
390
391MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>");
392MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver");
393MODULE_LICENSE("GPL");
394
