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9#include <linux/module.h>
10#include <linux/slab.h>
11#include <linux/delay.h>
12#include <linux/gpio.h>
13#include <linux/i2c.h>
14#include <linux/regmap.h>
15#include <linux/of.h>
16#include <linux/of_device.h>
17#include <linux/of_gpio.h>
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/soc.h>
21#include <sound/tlv.h>
22
23#define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
24 SNDRV_PCM_FMTBIT_S24_LE)
25
26#define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \
27 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
28 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
29 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000)
30
31#define PCM1681_SOFT_MUTE_ALL 0xff
32#define PCM1681_DEEMPH_RATE_MASK 0x18
33#define PCM1681_DEEMPH_MASK 0x01
34
35#define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9)
36#define PCM1681_SOFT_MUTE 0x07
37#define PCM1681_DAC_CONTROL 0x08
38#define PCM1681_FMT_CONTROL 0x09
39#define PCM1681_DEEMPH_CONTROL 0x0a
40#define PCM1681_ZERO_DETECT_STATUS 0x0e
41
42static const struct reg_default pcm1681_reg_defaults[] = {
43 { 0x01, 0xff },
44 { 0x02, 0xff },
45 { 0x03, 0xff },
46 { 0x04, 0xff },
47 { 0x05, 0xff },
48 { 0x06, 0xff },
49 { 0x07, 0x00 },
50 { 0x08, 0x00 },
51 { 0x09, 0x06 },
52 { 0x0A, 0x00 },
53 { 0x0B, 0xff },
54 { 0x0C, 0x0f },
55 { 0x0D, 0x00 },
56 { 0x10, 0xff },
57 { 0x11, 0xff },
58 { 0x12, 0x00 },
59 { 0x13, 0x00 },
60};
61
62static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg)
63{
64 return !((reg == 0x00) || (reg == 0x0f));
65}
66
67static bool pcm1681_writeable_reg(struct device *dev, unsigned int reg)
68{
69 return pcm1681_accessible_reg(dev, reg) &&
70 (reg != PCM1681_ZERO_DETECT_STATUS);
71}
72
73struct pcm1681_private {
74 struct regmap *regmap;
75 unsigned int format;
76
77 unsigned int deemph;
78
79 unsigned int rate;
80};
81
82static const int pcm1681_deemph[] = { 44100, 48000, 32000 };
83
84static int pcm1681_set_deemph(struct snd_soc_component *component)
85{
86 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
87 int i = 0, val = -1, enable = 0;
88
89 if (priv->deemph) {
90 for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++) {
91 if (pcm1681_deemph[i] == priv->rate) {
92 val = i;
93 break;
94 }
95 }
96 }
97
98 if (val != -1) {
99 regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
100 PCM1681_DEEMPH_RATE_MASK, val << 3);
101 enable = 1;
102 } else {
103 enable = 0;
104 }
105
106
107 return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
108 PCM1681_DEEMPH_MASK, enable);
109}
110
111static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol,
112 struct snd_ctl_elem_value *ucontrol)
113{
114 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
115 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
116
117 ucontrol->value.integer.value[0] = priv->deemph;
118
119 return 0;
120}
121
122static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol,
123 struct snd_ctl_elem_value *ucontrol)
124{
125 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
126 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
127
128 priv->deemph = ucontrol->value.integer.value[0];
129
130 return pcm1681_set_deemph(component);
131}
132
133static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai,
134 unsigned int format)
135{
136 struct snd_soc_component *component = codec_dai->component;
137 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
138
139
140 if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
141 dev_err(component->dev, "Invalid clocking mode\n");
142 return -EINVAL;
143 }
144
145 priv->format = format;
146
147 return 0;
148}
149
150static int pcm1681_digital_mute(struct snd_soc_dai *dai, int mute)
151{
152 struct snd_soc_component *component = dai->component;
153 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
154 int val;
155
156 if (mute)
157 val = PCM1681_SOFT_MUTE_ALL;
158 else
159 val = 0;
160
161 return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val);
162}
163
164static int pcm1681_hw_params(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params,
166 struct snd_soc_dai *dai)
167{
168 struct snd_soc_component *component = dai->component;
169 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
170 int val = 0, ret;
171
172 priv->rate = params_rate(params);
173
174 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
175 case SND_SOC_DAIFMT_RIGHT_J:
176 switch (params_width(params)) {
177 case 24:
178 val = 0;
179 break;
180 case 16:
181 val = 3;
182 break;
183 default:
184 return -EINVAL;
185 }
186 break;
187 case SND_SOC_DAIFMT_I2S:
188 val = 0x04;
189 break;
190 case SND_SOC_DAIFMT_LEFT_J:
191 val = 0x05;
192 break;
193 default:
194 dev_err(component->dev, "Invalid DAI format\n");
195 return -EINVAL;
196 }
197
198 ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val);
199 if (ret < 0)
200 return ret;
201
202 return pcm1681_set_deemph(component);
203}
204
205static const struct snd_soc_dai_ops pcm1681_dai_ops = {
206 .set_fmt = pcm1681_set_dai_fmt,
207 .hw_params = pcm1681_hw_params,
208 .digital_mute = pcm1681_digital_mute,
209};
210
211static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = {
212SND_SOC_DAPM_OUTPUT("VOUT1"),
213SND_SOC_DAPM_OUTPUT("VOUT2"),
214SND_SOC_DAPM_OUTPUT("VOUT3"),
215SND_SOC_DAPM_OUTPUT("VOUT4"),
216SND_SOC_DAPM_OUTPUT("VOUT5"),
217SND_SOC_DAPM_OUTPUT("VOUT6"),
218SND_SOC_DAPM_OUTPUT("VOUT7"),
219SND_SOC_DAPM_OUTPUT("VOUT8"),
220};
221
222static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = {
223 { "VOUT1", NULL, "Playback" },
224 { "VOUT2", NULL, "Playback" },
225 { "VOUT3", NULL, "Playback" },
226 { "VOUT4", NULL, "Playback" },
227 { "VOUT5", NULL, "Playback" },
228 { "VOUT6", NULL, "Playback" },
229 { "VOUT7", NULL, "Playback" },
230 { "VOUT8", NULL, "Playback" },
231};
232
233static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1);
234
235static const struct snd_kcontrol_new pcm1681_controls[] = {
236 SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume",
237 PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0,
238 0x7f, 0, pcm1681_dac_tlv),
239 SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume",
240 PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0,
241 0x7f, 0, pcm1681_dac_tlv),
242 SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume",
243 PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0,
244 0x7f, 0, pcm1681_dac_tlv),
245 SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume",
246 PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0,
247 0x7f, 0, pcm1681_dac_tlv),
248 SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
249 pcm1681_get_deemph, pcm1681_put_deemph),
250};
251
252static struct snd_soc_dai_driver pcm1681_dai = {
253 .name = "pcm1681-hifi",
254 .playback = {
255 .stream_name = "Playback",
256 .channels_min = 2,
257 .channels_max = 8,
258 .rates = PCM1681_PCM_RATES,
259 .formats = PCM1681_PCM_FORMATS,
260 },
261 .ops = &pcm1681_dai_ops,
262};
263
264#ifdef CONFIG_OF
265static const struct of_device_id pcm1681_dt_ids[] = {
266 { .compatible = "ti,pcm1681", },
267 { }
268};
269MODULE_DEVICE_TABLE(of, pcm1681_dt_ids);
270#endif
271
272static const struct regmap_config pcm1681_regmap = {
273 .reg_bits = 8,
274 .val_bits = 8,
275 .max_register = 0x13,
276 .reg_defaults = pcm1681_reg_defaults,
277 .num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults),
278 .writeable_reg = pcm1681_writeable_reg,
279 .readable_reg = pcm1681_accessible_reg,
280};
281
282static const struct snd_soc_component_driver soc_component_dev_pcm1681 = {
283 .controls = pcm1681_controls,
284 .num_controls = ARRAY_SIZE(pcm1681_controls),
285 .dapm_widgets = pcm1681_dapm_widgets,
286 .num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets),
287 .dapm_routes = pcm1681_dapm_routes,
288 .num_dapm_routes = ARRAY_SIZE(pcm1681_dapm_routes),
289 .idle_bias_on = 1,
290 .use_pmdown_time = 1,
291 .endianness = 1,
292 .non_legacy_dai_naming = 1,
293};
294
295static const struct i2c_device_id pcm1681_i2c_id[] = {
296 {"pcm1681", 0},
297 {}
298};
299MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id);
300
301static int pcm1681_i2c_probe(struct i2c_client *client,
302 const struct i2c_device_id *id)
303{
304 int ret;
305 struct pcm1681_private *priv;
306
307 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
308 if (!priv)
309 return -ENOMEM;
310
311 priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap);
312 if (IS_ERR(priv->regmap)) {
313 ret = PTR_ERR(priv->regmap);
314 dev_err(&client->dev, "Failed to create regmap: %d\n", ret);
315 return ret;
316 }
317
318 i2c_set_clientdata(client, priv);
319
320 return devm_snd_soc_register_component(&client->dev,
321 &soc_component_dev_pcm1681,
322 &pcm1681_dai, 1);
323}
324
325static struct i2c_driver pcm1681_i2c_driver = {
326 .driver = {
327 .name = "pcm1681",
328 .of_match_table = of_match_ptr(pcm1681_dt_ids),
329 },
330 .id_table = pcm1681_i2c_id,
331 .probe = pcm1681_i2c_probe,
332};
333
334module_i2c_driver(pcm1681_i2c_driver);
335
336MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver");
337MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>");
338MODULE_LICENSE("GPL");
339
