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13#include <linux/module.h>
14#include <linux/moduleparam.h>
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/delay.h>
18#include <linux/gpio.h>
19#include <linux/gpio/consumer.h>
20#include <linux/platform_device.h>
21#include <linux/pm.h>
22#include <linux/i2c.h>
23#include <linux/of_device.h>
24#include <linux/regmap.h>
25#include <linux/slab.h>
26#include <sound/core.h>
27#include <sound/pcm.h>
28#include <sound/pcm_params.h>
29#include <sound/soc.h>
30#include <sound/soc-dapm.h>
31#include <sound/initval.h>
32#include <sound/tlv.h>
33#include "cs4349.h"
34
35
36static const struct reg_default cs4349_reg_defaults[] = {
37 { 2, 0x00 },
38 { 3, 0x09 },
39 { 4, 0x81 },
40 { 5, 0x00 },
41 { 6, 0x00 },
42 { 7, 0xB1 },
43 { 8, 0x1C },
44};
45
46
47struct cs4349_private {
48 struct regmap *regmap;
49 struct gpio_desc *reset_gpio;
50 unsigned int mode;
51 int rate;
52};
53
54static bool cs4349_readable_register(struct device *dev, unsigned int reg)
55{
56 switch (reg) {
57 case CS4349_CHIPID ... CS4349_MISC:
58 return true;
59 default:
60 return false;
61 }
62}
63
64static bool cs4349_writeable_register(struct device *dev, unsigned int reg)
65{
66 switch (reg) {
67 case CS4349_MODE ... CS4349_MISC:
68 return true;
69 default:
70 return false;
71 }
72}
73
74static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai,
75 unsigned int format)
76{
77 struct snd_soc_component *component = codec_dai->component;
78 struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component);
79 unsigned int fmt;
80
81 fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
82
83 switch (fmt) {
84 case SND_SOC_DAIFMT_I2S:
85 case SND_SOC_DAIFMT_LEFT_J:
86 case SND_SOC_DAIFMT_RIGHT_J:
87 cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
88 break;
89 default:
90 return -EINVAL;
91 }
92
93 return 0;
94}
95
96static int cs4349_pcm_hw_params(struct snd_pcm_substream *substream,
97 struct snd_pcm_hw_params *params,
98 struct snd_soc_dai *dai)
99{
100 struct snd_soc_component *component = dai->component;
101 struct cs4349_private *cs4349 = snd_soc_component_get_drvdata(component);
102 int fmt, ret;
103
104 cs4349->rate = params_rate(params);
105
106 switch (cs4349->mode) {
107 case SND_SOC_DAIFMT_I2S:
108 fmt = DIF_I2S;
109 break;
110 case SND_SOC_DAIFMT_LEFT_J:
111 fmt = DIF_LEFT_JST;
112 break;
113 case SND_SOC_DAIFMT_RIGHT_J:
114 switch (params_width(params)) {
115 case 16:
116 fmt = DIF_RGHT_JST16;
117 break;
118 case 24:
119 fmt = DIF_RGHT_JST24;
120 break;
121 default:
122 return -EINVAL;
123 }
124 break;
125 default:
126 return -EINVAL;
127 }
128
129 ret = snd_soc_component_update_bits(component, CS4349_MODE, DIF_MASK,
130 MODE_FORMAT(fmt));
131 if (ret < 0)
132 return ret;
133
134 return 0;
135}
136
137static int cs4349_digital_mute(struct snd_soc_dai *dai, int mute)
138{
139 struct snd_soc_component *component = dai->component;
140 int reg;
141
142 reg = 0;
143 if (mute)
144 reg = MUTE_AB_MASK;
145
146 return snd_soc_component_update_bits(component, CS4349_MUTE, MUTE_AB_MASK, reg);
147}
148
149static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0);
150
151static const char * const chan_mix_texts[] = {
152 "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB",
153 "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL",
154 "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono",
155
156};
157
158static const char * const fm_texts[] = {
159 "Auto", "Single", "Double", "Quad",
160};
161
162static const char * const deemph_texts[] = {
163 "None", "44.1k", "48k", "32k",
164};
165
166static const char * const softr_zeroc_texts[] = {
167 "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
168};
169
170static int deemph_values[] = {
171 0, 4, 8, 12,
172};
173
174static int softr_zeroc_values[] = {
175 0, 64, 128, 192,
176};
177
178static const struct soc_enum chan_mix_enum =
179 SOC_ENUM_SINGLE(CS4349_VMI, 0,
180 ARRAY_SIZE(chan_mix_texts),
181 chan_mix_texts);
182
183static const struct soc_enum fm_mode_enum =
184 SOC_ENUM_SINGLE(CS4349_MODE, 0,
185 ARRAY_SIZE(fm_texts),
186 fm_texts);
187
188static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK,
189 deemph_texts, deemph_values);
190
191static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0,
192 SR_ZC_MASK, softr_zeroc_texts,
193 softr_zeroc_values);
194
195static const struct snd_kcontrol_new cs4349_snd_controls[] = {
196 SOC_DOUBLE_R_TLV("Master Playback Volume",
197 CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv),
198 SOC_ENUM("Functional Mode", fm_mode_enum),
199 SOC_ENUM("De-Emphasis Control", deemph_enum),
200 SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum),
201 SOC_ENUM("Channel Mixer", chan_mix_enum),
202 SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0),
203 SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0),
204 SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0),
205 SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0),
206 SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0),
207 SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0),
208 SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0),
209 SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0),
210 SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0),
211 SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0),
212};
213
214static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = {
215 SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
216
217 SND_SOC_DAPM_OUTPUT("OutputA"),
218 SND_SOC_DAPM_OUTPUT("OutputB"),
219};
220
221static const struct snd_soc_dapm_route cs4349_routes[] = {
222 {"DAC Playback", NULL, "OutputA"},
223 {"DAC Playback", NULL, "OutputB"},
224
225 {"OutputA", NULL, "HiFi DAC"},
226 {"OutputB", NULL, "HiFi DAC"},
227};
228
229#define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
230 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
231 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
232 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
233 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \
234 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \
235 SNDRV_PCM_FMTBIT_S32_LE)
236
237#define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000
238
239static const struct snd_soc_dai_ops cs4349_dai_ops = {
240 .hw_params = cs4349_pcm_hw_params,
241 .set_fmt = cs4349_set_dai_fmt,
242 .digital_mute = cs4349_digital_mute,
243};
244
245static struct snd_soc_dai_driver cs4349_dai = {
246 .name = "cs4349_hifi",
247 .playback = {
248 .stream_name = "DAC Playback",
249 .channels_min = 1,
250 .channels_max = 2,
251 .rates = CS4349_PCM_RATES,
252 .formats = CS4349_PCM_FORMATS,
253 },
254 .ops = &cs4349_dai_ops,
255 .symmetric_rates = 1,
256};
257
258static const struct snd_soc_component_driver soc_component_dev_cs4349 = {
259 .controls = cs4349_snd_controls,
260 .num_controls = ARRAY_SIZE(cs4349_snd_controls),
261 .dapm_widgets = cs4349_dapm_widgets,
262 .num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets),
263 .dapm_routes = cs4349_routes,
264 .num_dapm_routes = ARRAY_SIZE(cs4349_routes),
265 .idle_bias_on = 1,
266 .use_pmdown_time = 1,
267 .endianness = 1,
268 .non_legacy_dai_naming = 1,
269};
270
271static const struct regmap_config cs4349_regmap = {
272 .reg_bits = 8,
273 .val_bits = 8,
274
275 .max_register = CS4349_MISC,
276 .reg_defaults = cs4349_reg_defaults,
277 .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults),
278 .readable_reg = cs4349_readable_register,
279 .writeable_reg = cs4349_writeable_register,
280 .cache_type = REGCACHE_RBTREE,
281};
282
283static int cs4349_i2c_probe(struct i2c_client *client,
284 const struct i2c_device_id *id)
285{
286 struct cs4349_private *cs4349;
287 int ret;
288
289 cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL);
290 if (!cs4349)
291 return -ENOMEM;
292
293 cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap);
294 if (IS_ERR(cs4349->regmap)) {
295 ret = PTR_ERR(cs4349->regmap);
296 dev_err(&client->dev, "regmap_init() failed: %d\n", ret);
297 return ret;
298 }
299
300
301 cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev,
302 "reset", GPIOD_OUT_LOW);
303 if (IS_ERR(cs4349->reset_gpio))
304 return PTR_ERR(cs4349->reset_gpio);
305
306 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
307
308 i2c_set_clientdata(client, cs4349);
309
310 return devm_snd_soc_register_component(&client->dev,
311 &soc_component_dev_cs4349,
312 &cs4349_dai, 1);
313}
314
315static int cs4349_i2c_remove(struct i2c_client *client)
316{
317 struct cs4349_private *cs4349 = i2c_get_clientdata(client);
318
319
320 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
321
322 return 0;
323}
324
325#ifdef CONFIG_PM
326static int cs4349_runtime_suspend(struct device *dev)
327{
328 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
329 int ret;
330
331 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN);
332 if (ret < 0)
333 return ret;
334
335 regcache_cache_only(cs4349->regmap, true);
336
337
338 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
339
340 return 0;
341}
342
343static int cs4349_runtime_resume(struct device *dev)
344{
345 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
346 int ret;
347
348 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0);
349 if (ret < 0)
350 return ret;
351
352 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
353
354 regcache_cache_only(cs4349->regmap, false);
355 regcache_sync(cs4349->regmap);
356
357 return 0;
358}
359#endif
360
361static const struct dev_pm_ops cs4349_runtime_pm = {
362 SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume,
363 NULL)
364};
365
366static const struct of_device_id cs4349_of_match[] = {
367 { .compatible = "cirrus,cs4349", },
368 {},
369};
370
371MODULE_DEVICE_TABLE(of, cs4349_of_match);
372
373static const struct i2c_device_id cs4349_i2c_id[] = {
374 {"cs4349", 0},
375 {}
376};
377
378MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id);
379
380static struct i2c_driver cs4349_i2c_driver = {
381 .driver = {
382 .name = "cs4349",
383 .of_match_table = cs4349_of_match,
384 },
385 .id_table = cs4349_i2c_id,
386 .probe = cs4349_i2c_probe,
387 .remove = cs4349_i2c_remove,
388};
389
390module_i2c_driver(cs4349_i2c_driver);
391
392MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>");
393MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver");
394MODULE_LICENSE("GPL");
395
