This source file includes following definitions.
- cs4349_readable_register
- cs4349_writeable_register
- cs4349_set_dai_fmt
- cs4349_pcm_hw_params
- cs4349_digital_mute
- cs4349_i2c_probe
- cs4349_i2c_remove
- cs4349_runtime_suspend
- cs4349_runtime_resume
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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
33 static 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
44 struct cs4349_private {
45 struct regmap *regmap;
46 struct gpio_desc *reset_gpio;
47 unsigned int mode;
48 int rate;
49 };
50
51 static 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
61 static 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
71 static 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
93 static 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
134 static int cs4349_digital_mute(struct snd_soc_dai *dai, int mute)
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
146 static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0);
147
148 static 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
155 static const char * const fm_texts[] = {
156 "Auto", "Single", "Double", "Quad",
157 };
158
159 static const char * const deemph_texts[] = {
160 "None", "44.1k", "48k", "32k",
161 };
162
163 static const char * const softr_zeroc_texts[] = {
164 "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
165 };
166
167 static int deemph_values[] = {
168 0, 4, 8, 12,
169 };
170
171 static int softr_zeroc_values[] = {
172 0, 64, 128, 192,
173 };
174
175 static 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
180 static const struct soc_enum fm_mode_enum =
181 SOC_ENUM_SINGLE(CS4349_MODE, 0,
182 ARRAY_SIZE(fm_texts),
183 fm_texts);
184
185 static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK,
186 deemph_texts, deemph_values);
187
188 static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0,
189 SR_ZC_MASK, softr_zeroc_texts,
190 softr_zeroc_values);
191
192 static 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
211 static 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
218 static 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
236 static const struct snd_soc_dai_ops cs4349_dai_ops = {
237 .hw_params = cs4349_pcm_hw_params,
238 .set_fmt = cs4349_set_dai_fmt,
239 .digital_mute = cs4349_digital_mute,
240 };
241
242 static struct snd_soc_dai_driver cs4349_dai = {
243 .name = "cs4349_hifi",
244 .playback = {
245 .stream_name = "DAC Playback",
246 .channels_min = 1,
247 .channels_max = 2,
248 .rates = CS4349_PCM_RATES,
249 .formats = CS4349_PCM_FORMATS,
250 },
251 .ops = &cs4349_dai_ops,
252 .symmetric_rates = 1,
253 };
254
255 static const struct snd_soc_component_driver soc_component_dev_cs4349 = {
256 .controls = cs4349_snd_controls,
257 .num_controls = ARRAY_SIZE(cs4349_snd_controls),
258 .dapm_widgets = cs4349_dapm_widgets,
259 .num_dapm_widgets = ARRAY_SIZE(cs4349_dapm_widgets),
260 .dapm_routes = cs4349_routes,
261 .num_dapm_routes = ARRAY_SIZE(cs4349_routes),
262 .idle_bias_on = 1,
263 .use_pmdown_time = 1,
264 .endianness = 1,
265 .non_legacy_dai_naming = 1,
266 };
267
268 static const struct regmap_config cs4349_regmap = {
269 .reg_bits = 8,
270 .val_bits = 8,
271
272 .max_register = CS4349_MISC,
273 .reg_defaults = cs4349_reg_defaults,
274 .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults),
275 .readable_reg = cs4349_readable_register,
276 .writeable_reg = cs4349_writeable_register,
277 .cache_type = REGCACHE_RBTREE,
278 };
279
280 static int cs4349_i2c_probe(struct i2c_client *client,
281 const struct i2c_device_id *id)
282 {
283 struct cs4349_private *cs4349;
284 int ret;
285
286 cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL);
287 if (!cs4349)
288 return -ENOMEM;
289
290 cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap);
291 if (IS_ERR(cs4349->regmap)) {
292 ret = PTR_ERR(cs4349->regmap);
293 dev_err(&client->dev, "regmap_init() failed: %d\n", ret);
294 return ret;
295 }
296
297
298 cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev,
299 "reset", GPIOD_OUT_LOW);
300 if (IS_ERR(cs4349->reset_gpio))
301 return PTR_ERR(cs4349->reset_gpio);
302
303 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
304
305 i2c_set_clientdata(client, cs4349);
306
307 return devm_snd_soc_register_component(&client->dev,
308 &soc_component_dev_cs4349,
309 &cs4349_dai, 1);
310 }
311
312 static int cs4349_i2c_remove(struct i2c_client *client)
313 {
314 struct cs4349_private *cs4349 = i2c_get_clientdata(client);
315
316
317 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
318
319 return 0;
320 }
321
322 #ifdef CONFIG_PM
323 static int cs4349_runtime_suspend(struct device *dev)
324 {
325 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
326 int ret;
327
328 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, PWR_DWN);
329 if (ret < 0)
330 return ret;
331
332 regcache_cache_only(cs4349->regmap, true);
333
334
335 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
336
337 return 0;
338 }
339
340 static int cs4349_runtime_resume(struct device *dev)
341 {
342 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
343 int ret;
344
345 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0);
346 if (ret < 0)
347 return ret;
348
349 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
350
351 regcache_cache_only(cs4349->regmap, false);
352 regcache_sync(cs4349->regmap);
353
354 return 0;
355 }
356 #endif
357
358 static const struct dev_pm_ops cs4349_runtime_pm = {
359 SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume,
360 NULL)
361 };
362
363 static const struct of_device_id cs4349_of_match[] = {
364 { .compatible = "cirrus,cs4349", },
365 {},
366 };
367
368 MODULE_DEVICE_TABLE(of, cs4349_of_match);
369
370 static const struct i2c_device_id cs4349_i2c_id[] = {
371 {"cs4349", 0},
372 {}
373 };
374
375 MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id);
376
377 static struct i2c_driver cs4349_i2c_driver = {
378 .driver = {
379 .name = "cs4349",
380 .of_match_table = cs4349_of_match,
381 .pm = &cs4349_runtime_pm,
382 },
383 .id_table = cs4349_i2c_id,
384 .probe = cs4349_i2c_probe,
385 .remove = cs4349_i2c_remove,
386 };
387
388 module_i2c_driver(cs4349_i2c_driver);
389
390 MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>");
391 MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver");
392 MODULE_LICENSE("GPL");