2 * cs4349.c -- CS4349 ALSA Soc Audio driver
4 * Copyright 2015 Cirrus Logic, Inc.
6 * Authors: Tim Howe <Tim.Howe@cirrus.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
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/platform_device.h>
21 #include <linux/i2c.h>
22 #include <linux/of_device.h>
23 #include <linux/regmap.h>
24 #include <linux/slab.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/pcm_params.h>
28 #include <sound/soc.h>
29 #include <sound/soc-dapm.h>
30 #include <sound/initval.h>
31 #include <sound/tlv.h>
35 static const struct reg_default cs4349_reg_defaults[] = {
36 { 2, 0x00 }, /* r02 - Mode Control */
37 { 3, 0x09 }, /* r03 - Volume, Mixing and Inversion Control */
38 { 4, 0x81 }, /* r04 - Mute Control */
39 { 5, 0x00 }, /* r05 - Channel A Volume Control */
40 { 6, 0x00 }, /* r06 - Channel B Volume Control */
41 { 7, 0xB1 }, /* r07 - Ramp and Filter Control */
42 { 8, 0x1C }, /* r08 - Misc. Control */
45 /* Private data for the CS4349 */
46 struct cs4349_private {
47 struct regmap *regmap;
48 struct gpio_desc *reset_gpio;
53 static bool cs4349_readable_register(struct device *dev, unsigned int reg)
56 case CS4349_CHIPID ... CS4349_MISC:
63 static bool cs4349_writeable_register(struct device *dev, unsigned int reg)
66 case CS4349_MODE ... CS4349_MISC:
73 static int cs4349_set_dai_fmt(struct snd_soc_dai *codec_dai,
76 struct snd_soc_codec *codec = codec_dai->codec;
77 struct cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec);
80 fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
83 case SND_SOC_DAIFMT_I2S:
84 case SND_SOC_DAIFMT_LEFT_J:
85 case SND_SOC_DAIFMT_RIGHT_J:
86 cs4349->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
95 static int cs4349_pcm_hw_params(struct snd_pcm_substream *substream,
96 struct snd_pcm_hw_params *params,
97 struct snd_soc_dai *dai)
99 struct snd_soc_codec *codec = dai->codec;
100 struct cs4349_private *cs4349 = snd_soc_codec_get_drvdata(codec);
103 cs4349->rate = params_rate(params);
105 switch (cs4349->mode) {
106 case SND_SOC_DAIFMT_I2S:
109 case SND_SOC_DAIFMT_LEFT_J:
112 case SND_SOC_DAIFMT_RIGHT_J:
113 switch (params_width(params)) {
115 fmt = DIF_RGHT_JST16;
118 fmt = DIF_RGHT_JST24;
128 ret = snd_soc_update_bits(codec, CS4349_MODE, DIF_MASK,
136 static int cs4349_digital_mute(struct snd_soc_dai *dai, int mute)
138 struct snd_soc_codec *codec = dai->codec;
145 return snd_soc_update_bits(codec, CS4349_MUTE, MUTE_AB_MASK, reg);
148 static DECLARE_TLV_DB_SCALE(dig_tlv, -12750, 50, 0);
150 static const char * const chan_mix_texts[] = {
151 "Mute", "MuteA", "MuteA SwapB", "MuteA MonoB", "SwapA MuteB",
152 "BothR", "Swap", "SwapA MonoB", "MuteB", "Normal", "BothL",
153 "MonoB", "MonoA MuteB", "MonoA", "MonoA SwapB", "Mono",
154 /*Normal == Channel A = Left, Channel B = Right*/
157 static const char * const fm_texts[] = {
158 "Auto", "Single", "Double", "Quad",
161 static const char * const deemph_texts[] = {
162 "None", "44.1k", "48k", "32k",
165 static const char * const softr_zeroc_texts[] = {
166 "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC",
169 static int deemph_values[] = {
173 static int softr_zeroc_values[] = {
177 static const struct soc_enum chan_mix_enum =
178 SOC_ENUM_SINGLE(CS4349_VMI, 0,
179 ARRAY_SIZE(chan_mix_texts),
182 static const struct soc_enum fm_mode_enum =
183 SOC_ENUM_SINGLE(CS4349_MODE, 0,
184 ARRAY_SIZE(fm_texts),
187 static SOC_VALUE_ENUM_SINGLE_DECL(deemph_enum, CS4349_MODE, 0, DEM_MASK,
188 deemph_texts, deemph_values);
190 static SOC_VALUE_ENUM_SINGLE_DECL(softr_zeroc_enum, CS4349_RMPFLT, 0,
191 SR_ZC_MASK, softr_zeroc_texts,
194 static const struct snd_kcontrol_new cs4349_snd_controls[] = {
195 SOC_DOUBLE_R_TLV("Master Playback Volume",
196 CS4349_VOLA, CS4349_VOLB, 0, 0xFF, 1, dig_tlv),
197 SOC_ENUM("Functional Mode", fm_mode_enum),
198 SOC_ENUM("De-Emphasis Control", deemph_enum),
199 SOC_ENUM("Soft Ramp Zero Cross Control", softr_zeroc_enum),
200 SOC_ENUM("Channel Mixer", chan_mix_enum),
201 SOC_SINGLE("VolA = VolB Switch", CS4349_VMI, 7, 1, 0),
202 SOC_SINGLE("InvertA Switch", CS4349_VMI, 6, 1, 0),
203 SOC_SINGLE("InvertB Switch", CS4349_VMI, 5, 1, 0),
204 SOC_SINGLE("Auto-Mute Switch", CS4349_MUTE, 7, 1, 0),
205 SOC_SINGLE("MUTEC A = B Switch", CS4349_MUTE, 5, 1, 0),
206 SOC_SINGLE("Soft Ramp Up Switch", CS4349_RMPFLT, 5, 1, 0),
207 SOC_SINGLE("Soft Ramp Down Switch", CS4349_RMPFLT, 4, 1, 0),
208 SOC_SINGLE("Slow Roll Off Filter Switch", CS4349_RMPFLT, 2, 1, 0),
209 SOC_SINGLE("Freeze Switch", CS4349_MISC, 5, 1, 0),
210 SOC_SINGLE("Popguard Switch", CS4349_MISC, 4, 1, 0),
213 static const struct snd_soc_dapm_widget cs4349_dapm_widgets[] = {
214 SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0),
216 SND_SOC_DAPM_OUTPUT("OutputA"),
217 SND_SOC_DAPM_OUTPUT("OutputB"),
220 static const struct snd_soc_dapm_route cs4349_routes[] = {
221 {"DAC Playback", NULL, "OutputA"},
222 {"DAC Playback", NULL, "OutputB"},
224 {"OutputA", NULL, "HiFi DAC"},
225 {"OutputB", NULL, "HiFi DAC"},
228 #define CS4349_PCM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
229 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
230 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
231 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
232 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \
233 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \
234 SNDRV_PCM_FMTBIT_S32_LE)
236 #define CS4349_PCM_RATES SNDRV_PCM_RATE_8000_192000
238 static const struct snd_soc_dai_ops cs4349_dai_ops = {
239 .hw_params = cs4349_pcm_hw_params,
240 .set_fmt = cs4349_set_dai_fmt,
241 .digital_mute = cs4349_digital_mute,
244 static struct snd_soc_dai_driver cs4349_dai = {
245 .name = "cs4349_hifi",
247 .stream_name = "DAC Playback",
250 .rates = CS4349_PCM_RATES,
251 .formats = CS4349_PCM_FORMATS,
253 .ops = &cs4349_dai_ops,
254 .symmetric_rates = 1,
257 static struct snd_soc_codec_driver soc_codec_dev_cs4349 = {
258 .controls = cs4349_snd_controls,
259 .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),
267 static const struct regmap_config cs4349_regmap = {
271 .max_register = CS4349_MISC,
272 .reg_defaults = cs4349_reg_defaults,
273 .num_reg_defaults = ARRAY_SIZE(cs4349_reg_defaults),
274 .readable_reg = cs4349_readable_register,
275 .writeable_reg = cs4349_writeable_register,
276 .cache_type = REGCACHE_RBTREE,
279 static int cs4349_i2c_probe(struct i2c_client *client,
280 const struct i2c_device_id *id)
282 struct cs4349_private *cs4349;
285 cs4349 = devm_kzalloc(&client->dev, sizeof(*cs4349), GFP_KERNEL);
289 cs4349->regmap = devm_regmap_init_i2c(client, &cs4349_regmap);
290 if (IS_ERR(cs4349->regmap)) {
291 ret = PTR_ERR(cs4349->regmap);
292 dev_err(&client->dev, "regmap_init() failed: %d\n", ret);
296 /* Reset the Device */
297 cs4349->reset_gpio = devm_gpiod_get_optional(&client->dev,
298 "reset", GPIOD_OUT_LOW);
299 if (IS_ERR(cs4349->reset_gpio))
300 return PTR_ERR(cs4349->reset_gpio);
302 if (cs4349->reset_gpio)
303 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
305 i2c_set_clientdata(client, cs4349);
307 return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4349,
311 static int cs4349_i2c_remove(struct i2c_client *client)
313 struct cs4349_private *cs4349 = i2c_get_clientdata(client);
315 snd_soc_unregister_codec(&client->dev);
317 /* Hold down reset */
318 if (cs4349->reset_gpio)
319 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
325 static int cs4349_runtime_suspend(struct device *dev)
327 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
330 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 1);
334 regcache_cache_only(cs4349->regmap, true);
336 /* Hold down reset */
337 if (cs4349->reset_gpio)
338 gpiod_set_value_cansleep(cs4349->reset_gpio, 0);
343 static int cs4349_runtime_resume(struct device *dev)
345 struct cs4349_private *cs4349 = dev_get_drvdata(dev);
348 ret = regmap_update_bits(cs4349->regmap, CS4349_MISC, PWR_DWN, 0);
352 if (cs4349->reset_gpio)
353 gpiod_set_value_cansleep(cs4349->reset_gpio, 1);
355 regcache_cache_only(cs4349->regmap, false);
356 regcache_sync(cs4349->regmap);
362 static const struct dev_pm_ops cs4349_runtime_pm = {
363 SET_RUNTIME_PM_OPS(cs4349_runtime_suspend, cs4349_runtime_resume,
367 static const struct of_device_id cs4349_of_match[] = {
368 { .compatible = "cirrus,cs4349", },
372 MODULE_DEVICE_TABLE(of, cs4349_of_match);
374 static const struct i2c_device_id cs4349_i2c_id[] = {
379 MODULE_DEVICE_TABLE(i2c, cs4349_i2c_id);
381 static struct i2c_driver cs4349_i2c_driver = {
384 .owner = THIS_MODULE,
385 .of_match_table = cs4349_of_match,
387 .id_table = cs4349_i2c_id,
388 .probe = cs4349_i2c_probe,
389 .remove = cs4349_i2c_remove,
392 module_i2c_driver(cs4349_i2c_driver);
394 MODULE_AUTHOR("Tim Howe <tim.howe@cirrus.com>");
395 MODULE_DESCRIPTION("Cirrus Logic CS4349 ALSA SoC Codec Driver");
396 MODULE_LICENSE("GPL");