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18#include <linux/module.h>
19#include <linux/slab.h>
20#include <linux/delay.h>
21#include <linux/gpio.h>
22#include <linux/i2c.h>
23#include <linux/regmap.h>
24#include <linux/of.h>
25#include <linux/of_device.h>
26#include <linux/of_gpio.h>
27#include <sound/pcm.h>
28#include <sound/pcm_params.h>
29#include <sound/soc.h>
30#include <sound/tlv.h>
31
32#define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
33 SNDRV_PCM_FMTBIT_S24_LE)
34
35#define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \
36 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
37 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
38 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000)
39
40#define PCM1681_SOFT_MUTE_ALL 0xff
41#define PCM1681_DEEMPH_RATE_MASK 0x18
42#define PCM1681_DEEMPH_MASK 0x01
43
44#define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9)
45#define PCM1681_SOFT_MUTE 0x07
46#define PCM1681_DAC_CONTROL 0x08
47#define PCM1681_FMT_CONTROL 0x09
48#define PCM1681_DEEMPH_CONTROL 0x0a
49#define PCM1681_ZERO_DETECT_STATUS 0x0e
50
51static const struct reg_default pcm1681_reg_defaults[] = {
52 { 0x01, 0xff },
53 { 0x02, 0xff },
54 { 0x03, 0xff },
55 { 0x04, 0xff },
56 { 0x05, 0xff },
57 { 0x06, 0xff },
58 { 0x07, 0x00 },
59 { 0x08, 0x00 },
60 { 0x09, 0x06 },
61 { 0x0A, 0x00 },
62 { 0x0B, 0xff },
63 { 0x0C, 0x0f },
64 { 0x0D, 0x00 },
65 { 0x10, 0xff },
66 { 0x11, 0xff },
67 { 0x12, 0x00 },
68 { 0x13, 0x00 },
69};
70
71static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg)
72{
73 return !((reg == 0x00) || (reg == 0x0f));
74}
75
76static bool pcm1681_writeable_reg(struct device *dev, unsigned register reg)
77{
78 return pcm1681_accessible_reg(dev, reg) &&
79 (reg != PCM1681_ZERO_DETECT_STATUS);
80}
81
82struct pcm1681_private {
83 struct regmap *regmap;
84 unsigned int format;
85
86 unsigned int deemph;
87
88 unsigned int rate;
89};
90
91static const int pcm1681_deemph[] = { 44100, 48000, 32000 };
92
93static int pcm1681_set_deemph(struct snd_soc_codec *codec)
94{
95 struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
96 int i = 0, val = -1, enable = 0;
97
98 if (priv->deemph) {
99 for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++) {
100 if (pcm1681_deemph[i] == priv->rate) {
101 val = i;
102 break;
103 }
104 }
105 }
106
107 if (val != -1) {
108 regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
109 PCM1681_DEEMPH_RATE_MASK, val << 3);
110 enable = 1;
111 } else {
112 enable = 0;
113 }
114
115
116 return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
117 PCM1681_DEEMPH_MASK, enable);
118}
119
120static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol,
121 struct snd_ctl_elem_value *ucontrol)
122{
123 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
124 struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
125
126 ucontrol->value.integer.value[0] = priv->deemph;
127
128 return 0;
129}
130
131static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol,
132 struct snd_ctl_elem_value *ucontrol)
133{
134 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
135 struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
136
137 priv->deemph = ucontrol->value.integer.value[0];
138
139 return pcm1681_set_deemph(codec);
140}
141
142static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai,
143 unsigned int format)
144{
145 struct snd_soc_codec *codec = codec_dai->codec;
146 struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
147
148
149 if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
150 dev_err(codec->dev, "Invalid clocking mode\n");
151 return -EINVAL;
152 }
153
154 priv->format = format;
155
156 return 0;
157}
158
159static int pcm1681_digital_mute(struct snd_soc_dai *dai, int mute)
160{
161 struct snd_soc_codec *codec = dai->codec;
162 struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
163 int val;
164
165 if (mute)
166 val = PCM1681_SOFT_MUTE_ALL;
167 else
168 val = 0;
169
170 return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val);
171}
172
173static int pcm1681_hw_params(struct snd_pcm_substream *substream,
174 struct snd_pcm_hw_params *params,
175 struct snd_soc_dai *dai)
176{
177 struct snd_soc_codec *codec = dai->codec;
178 struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);
179 int val = 0, ret;
180
181 priv->rate = params_rate(params);
182
183 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
184 case SND_SOC_DAIFMT_RIGHT_J:
185 switch (params_width(params)) {
186 case 24:
187 val = 0;
188 break;
189 case 16:
190 val = 3;
191 break;
192 default:
193 return -EINVAL;
194 }
195 break;
196 case SND_SOC_DAIFMT_I2S:
197 val = 0x04;
198 break;
199 case SND_SOC_DAIFMT_LEFT_J:
200 val = 0x05;
201 break;
202 default:
203 dev_err(codec->dev, "Invalid DAI format\n");
204 return -EINVAL;
205 }
206
207 ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val);
208 if (ret < 0)
209 return ret;
210
211 return pcm1681_set_deemph(codec);
212}
213
214static const struct snd_soc_dai_ops pcm1681_dai_ops = {
215 .set_fmt = pcm1681_set_dai_fmt,
216 .hw_params = pcm1681_hw_params,
217 .digital_mute = pcm1681_digital_mute,
218};
219
220static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = {
221SND_SOC_DAPM_OUTPUT("VOUT1"),
222SND_SOC_DAPM_OUTPUT("VOUT2"),
223SND_SOC_DAPM_OUTPUT("VOUT3"),
224SND_SOC_DAPM_OUTPUT("VOUT4"),
225SND_SOC_DAPM_OUTPUT("VOUT5"),
226SND_SOC_DAPM_OUTPUT("VOUT6"),
227SND_SOC_DAPM_OUTPUT("VOUT7"),
228SND_SOC_DAPM_OUTPUT("VOUT8"),
229};
230
231static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = {
232 { "VOUT1", NULL, "Playback" },
233 { "VOUT2", NULL, "Playback" },
234 { "VOUT3", NULL, "Playback" },
235 { "VOUT4", NULL, "Playback" },
236 { "VOUT5", NULL, "Playback" },
237 { "VOUT6", NULL, "Playback" },
238 { "VOUT7", NULL, "Playback" },
239 { "VOUT8", NULL, "Playback" },
240};
241
242static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1);
243
244static const struct snd_kcontrol_new pcm1681_controls[] = {
245 SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume",
246 PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0,
247 0x7f, 0, pcm1681_dac_tlv),
248 SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume",
249 PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0,
250 0x7f, 0, pcm1681_dac_tlv),
251 SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume",
252 PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0,
253 0x7f, 0, pcm1681_dac_tlv),
254 SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume",
255 PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0,
256 0x7f, 0, pcm1681_dac_tlv),
257 SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
258 pcm1681_get_deemph, pcm1681_put_deemph),
259};
260
261static struct snd_soc_dai_driver pcm1681_dai = {
262 .name = "pcm1681-hifi",
263 .playback = {
264 .stream_name = "Playback",
265 .channels_min = 2,
266 .channels_max = 8,
267 .rates = PCM1681_PCM_RATES,
268 .formats = PCM1681_PCM_FORMATS,
269 },
270 .ops = &pcm1681_dai_ops,
271};
272
273#ifdef CONFIG_OF
274static const struct of_device_id pcm1681_dt_ids[] = {
275 { .compatible = "ti,pcm1681", },
276 { }
277};
278MODULE_DEVICE_TABLE(of, pcm1681_dt_ids);
279#endif
280
281static const struct regmap_config pcm1681_regmap = {
282 .reg_bits = 8,
283 .val_bits = 8,
284 .max_register = 0x13,
285 .reg_defaults = pcm1681_reg_defaults,
286 .num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults),
287 .writeable_reg = pcm1681_writeable_reg,
288 .readable_reg = pcm1681_accessible_reg,
289};
290
291static struct snd_soc_codec_driver soc_codec_dev_pcm1681 = {
292 .controls = pcm1681_controls,
293 .num_controls = ARRAY_SIZE(pcm1681_controls),
294 .dapm_widgets = pcm1681_dapm_widgets,
295 .num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets),
296 .dapm_routes = pcm1681_dapm_routes,
297 .num_dapm_routes = ARRAY_SIZE(pcm1681_dapm_routes),
298};
299
300static const struct i2c_device_id pcm1681_i2c_id[] = {
301 {"pcm1681", 0},
302 {}
303};
304MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id);
305
306static int pcm1681_i2c_probe(struct i2c_client *client,
307 const struct i2c_device_id *id)
308{
309 int ret;
310 struct pcm1681_private *priv;
311
312 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
313 if (!priv)
314 return -ENOMEM;
315
316 priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap);
317 if (IS_ERR(priv->regmap)) {
318 ret = PTR_ERR(priv->regmap);
319 dev_err(&client->dev, "Failed to create regmap: %d\n", ret);
320 return ret;
321 }
322
323 i2c_set_clientdata(client, priv);
324
325 return snd_soc_register_codec(&client->dev, &soc_codec_dev_pcm1681,
326 &pcm1681_dai, 1);
327}
328
329static int pcm1681_i2c_remove(struct i2c_client *client)
330{
331 snd_soc_unregister_codec(&client->dev);
332 return 0;
333}
334
335static struct i2c_driver pcm1681_i2c_driver = {
336 .driver = {
337 .name = "pcm1681",
338 .of_match_table = of_match_ptr(pcm1681_dt_ids),
339 },
340 .id_table = pcm1681_i2c_id,
341 .probe = pcm1681_i2c_probe,
342 .remove = pcm1681_i2c_remove,
343};
344
345module_i2c_driver(pcm1681_i2c_driver);
346
347MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver");
348MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>");
349MODULE_LICENSE("GPL");
350
