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8#include <linux/module.h>
9#include <linux/moduleparam.h>
10#include <linux/init.h>
11#include <linux/delay.h>
12#include <linux/pm.h>
13#include <linux/device.h>
14#include <linux/sysfs.h>
15#include <linux/spi/spi.h>
16#include <linux/slab.h>
17#include <sound/core.h>
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/soc.h>
21#include <sound/initval.h>
22
23#include "tlv320aic26.h"
24
25MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver");
26MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
27MODULE_LICENSE("GPL");
28
29
30struct aic26 {
31 struct spi_device *spi;
32 struct regmap *regmap;
33 struct snd_soc_codec *codec;
34 int master;
35 int datfm;
36 int mclk;
37
38
39 int keyclick_amplitude;
40 int keyclick_freq;
41 int keyclick_len;
42};
43
44static const struct snd_soc_dapm_widget tlv320aic26_dapm_widgets[] = {
45SND_SOC_DAPM_INPUT("MICIN"),
46SND_SOC_DAPM_INPUT("AUX"),
47
48SND_SOC_DAPM_OUTPUT("HPL"),
49SND_SOC_DAPM_OUTPUT("HPR"),
50};
51
52static const struct snd_soc_dapm_route tlv320aic26_dapm_routes[] = {
53 { "Capture", NULL, "MICIN" },
54 { "Capture", NULL, "AUX" },
55
56 { "HPL", NULL, "Playback" },
57 { "HPR", NULL, "Playback" },
58};
59
60
61
62
63static int aic26_hw_params(struct snd_pcm_substream *substream,
64 struct snd_pcm_hw_params *params,
65 struct snd_soc_dai *dai)
66{
67 struct snd_soc_codec *codec = dai->codec;
68 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
69 int fsref, divisor, wlen, pval, jval, dval, qval;
70 u16 reg;
71
72 dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n",
73 substream, params);
74 dev_dbg(&aic26->spi->dev, "rate=%i width=%d\n", params_rate(params),
75 params_width(params));
76
77 switch (params_rate(params)) {
78 case 8000: fsref = 48000; divisor = AIC26_DIV_6; break;
79 case 11025: fsref = 44100; divisor = AIC26_DIV_4; break;
80 case 12000: fsref = 48000; divisor = AIC26_DIV_4; break;
81 case 16000: fsref = 48000; divisor = AIC26_DIV_3; break;
82 case 22050: fsref = 44100; divisor = AIC26_DIV_2; break;
83 case 24000: fsref = 48000; divisor = AIC26_DIV_2; break;
84 case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break;
85 case 44100: fsref = 44100; divisor = AIC26_DIV_1; break;
86 case 48000: fsref = 48000; divisor = AIC26_DIV_1; break;
87 default:
88 dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL;
89 }
90
91
92 switch (params_width(params)) {
93 case 8: wlen = AIC26_WLEN_16; break;
94 case 16: wlen = AIC26_WLEN_16; break;
95 case 24: wlen = AIC26_WLEN_24; break;
96 case 32: wlen = AIC26_WLEN_32; break;
97 default:
98 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
99 }
100
101
102
103
104
105
106 pval = 1;
107
108 jval = fsref / (aic26->mclk / 2048);
109
110 dval = fsref - (jval * (aic26->mclk / 2048));
111 dval = (10000 * dval) / (aic26->mclk / 2048);
112 dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval);
113 qval = 0;
114 reg = 0x8000 | qval << 11 | pval << 8 | jval << 2;
115 snd_soc_write(codec, AIC26_REG_PLL_PROG1, reg);
116 reg = dval << 2;
117 snd_soc_write(codec, AIC26_REG_PLL_PROG2, reg);
118
119
120 if (aic26->master)
121 reg = 0x0800;
122 if (fsref == 48000)
123 reg = 0x2000;
124 snd_soc_update_bits(codec, AIC26_REG_AUDIO_CTRL3, 0xf800, reg);
125
126
127 reg = wlen | aic26->datfm | (divisor << 3) | divisor;
128 snd_soc_update_bits(codec, AIC26_REG_AUDIO_CTRL1, 0xfff, reg);
129
130 return 0;
131}
132
133
134
135
136static int aic26_mute(struct snd_soc_dai *dai, int mute)
137{
138 struct snd_soc_codec *codec = dai->codec;
139 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
140 u16 reg;
141
142 dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n",
143 dai, mute);
144
145 if (mute)
146 reg = 0x8080;
147 else
148 reg = 0;
149 snd_soc_update_bits(codec, AIC26_REG_DAC_GAIN, 0x8000, reg);
150
151 return 0;
152}
153
154static int aic26_set_sysclk(struct snd_soc_dai *codec_dai,
155 int clk_id, unsigned int freq, int dir)
156{
157 struct snd_soc_codec *codec = codec_dai->codec;
158 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
159
160 dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i,"
161 " freq=%i, dir=%i)\n",
162 codec_dai, clk_id, freq, dir);
163
164
165 if ((freq < 2000000) || (freq > 50000000))
166 return -EINVAL;
167
168 aic26->mclk = freq;
169 return 0;
170}
171
172static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
173{
174 struct snd_soc_codec *codec = codec_dai->codec;
175 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
176
177 dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n",
178 codec_dai, fmt);
179
180
181 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
182 case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break;
183 case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break;
184 default:
185 dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL;
186 }
187
188
189 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
190 case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break;
191 case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break;
192 case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break;
193 case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break;
194 default:
195 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
196 }
197
198 return 0;
199}
200
201
202
203
204#define AIC26_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
205 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
206 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
207 SNDRV_PCM_RATE_48000)
208#define AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\
209 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
210
211static const struct snd_soc_dai_ops aic26_dai_ops = {
212 .hw_params = aic26_hw_params,
213 .digital_mute = aic26_mute,
214 .set_sysclk = aic26_set_sysclk,
215 .set_fmt = aic26_set_fmt,
216};
217
218static struct snd_soc_dai_driver aic26_dai = {
219 .name = "tlv320aic26-hifi",
220 .playback = {
221 .stream_name = "Playback",
222 .channels_min = 2,
223 .channels_max = 2,
224 .rates = AIC26_RATES,
225 .formats = AIC26_FORMATS,
226 },
227 .capture = {
228 .stream_name = "Capture",
229 .channels_min = 2,
230 .channels_max = 2,
231 .rates = AIC26_RATES,
232 .formats = AIC26_FORMATS,
233 },
234 .ops = &aic26_dai_ops,
235};
236
237
238
239
240static const char *aic26_capture_src_text[] = {"Mic", "Aux"};
241static SOC_ENUM_SINGLE_DECL(aic26_capture_src_enum,
242 AIC26_REG_AUDIO_CTRL1, 12,
243 aic26_capture_src_text);
244
245static const struct snd_kcontrol_new aic26_snd_controls[] = {
246
247 SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1),
248 SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1),
249 SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0),
250 SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1),
251 SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0),
252 SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0),
253 SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0),
254 SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0),
255 SOC_ENUM("Capture Source", aic26_capture_src_enum),
256};
257
258
259
260
261
262static ssize_t aic26_keyclick_show(struct device *dev,
263 struct device_attribute *attr, char *buf)
264{
265 struct aic26 *aic26 = dev_get_drvdata(dev);
266 int val, amp, freq, len;
267
268 val = snd_soc_read(aic26->codec, AIC26_REG_AUDIO_CTRL2);
269 amp = (val >> 12) & 0x7;
270 freq = (125 << ((val >> 8) & 0x7)) >> 1;
271 len = 2 * (1 + ((val >> 4) & 0xf));
272
273 return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
274}
275
276
277static ssize_t aic26_keyclick_set(struct device *dev,
278 struct device_attribute *attr,
279 const char *buf, size_t count)
280{
281 struct aic26 *aic26 = dev_get_drvdata(dev);
282
283 snd_soc_update_bits(aic26->codec, AIC26_REG_AUDIO_CTRL2,
284 0x8000, 0x800);
285
286 return count;
287}
288
289static DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set);
290
291
292
293
294static int aic26_probe(struct snd_soc_codec *codec)
295{
296 struct aic26 *aic26 = dev_get_drvdata(codec->dev);
297 int ret, reg;
298
299 aic26->codec = codec;
300
301
302 snd_soc_write(codec, AIC26_REG_RESET, 0xBB00);
303
304
305 snd_soc_write(codec, AIC26_REG_POWER_CTRL, 0);
306
307
308 reg = snd_soc_read(codec, AIC26_REG_AUDIO_CTRL3);
309 reg &= ~0xf800;
310 reg |= 0x0800;
311 snd_soc_write(codec, AIC26_REG_AUDIO_CTRL3, reg);
312
313
314
315 ret = device_create_file(codec->dev, &dev_attr_keyclick);
316 if (ret)
317 dev_info(codec->dev, "error creating sysfs files\n");
318
319 return 0;
320}
321
322static struct snd_soc_codec_driver aic26_soc_codec_dev = {
323 .probe = aic26_probe,
324 .controls = aic26_snd_controls,
325 .num_controls = ARRAY_SIZE(aic26_snd_controls),
326 .dapm_widgets = tlv320aic26_dapm_widgets,
327 .num_dapm_widgets = ARRAY_SIZE(tlv320aic26_dapm_widgets),
328 .dapm_routes = tlv320aic26_dapm_routes,
329 .num_dapm_routes = ARRAY_SIZE(tlv320aic26_dapm_routes),
330};
331
332static const struct regmap_config aic26_regmap = {
333 .reg_bits = 16,
334 .val_bits = 16,
335};
336
337
338
339
340
341static int aic26_spi_probe(struct spi_device *spi)
342{
343 struct aic26 *aic26;
344 int ret;
345
346 dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n");
347
348
349 aic26 = devm_kzalloc(&spi->dev, sizeof *aic26, GFP_KERNEL);
350 if (!aic26)
351 return -ENOMEM;
352
353 aic26->regmap = devm_regmap_init_spi(spi, &aic26_regmap);
354 if (IS_ERR(aic26->regmap))
355 return PTR_ERR(aic26->regmap);
356
357
358 aic26->spi = spi;
359 dev_set_drvdata(&spi->dev, aic26);
360 aic26->master = 1;
361
362 ret = snd_soc_register_codec(&spi->dev,
363 &aic26_soc_codec_dev, &aic26_dai, 1);
364 return ret;
365}
366
367static int aic26_spi_remove(struct spi_device *spi)
368{
369 snd_soc_unregister_codec(&spi->dev);
370 return 0;
371}
372
373static struct spi_driver aic26_spi = {
374 .driver = {
375 .name = "tlv320aic26-codec",
376 .owner = THIS_MODULE,
377 },
378 .probe = aic26_spi_probe,
379 .remove = aic26_spi_remove,
380};
381
382module_spi_driver(aic26_spi);
383
