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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 snd_soc_codec codec;
33 int master;
34 int datfm;
35 int mclk;
36
37
38 int keyclick_amplitude;
39 int keyclick_freq;
40 int keyclick_len;
41};
42
43
44
45
46static unsigned int aic26_reg_read(struct snd_soc_codec *codec,
47 unsigned int reg)
48{
49 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
50 u16 *cache = codec->reg_cache;
51 u16 cmd, value;
52 u8 buffer[2];
53 int rc;
54
55 if (reg >= AIC26_NUM_REGS) {
56 WARN_ON_ONCE(1);
57 return 0;
58 }
59
60
61
62 cmd = AIC26_READ_COMMAND_WORD(reg);
63 buffer[0] = (cmd >> 8) & 0xff;
64 buffer[1] = cmd & 0xff;
65 rc = spi_write_then_read(aic26->spi, buffer, 2, buffer, 2);
66 if (rc) {
67 dev_err(&aic26->spi->dev, "AIC26 reg read error\n");
68 return -EIO;
69 }
70 value = (buffer[0] << 8) | buffer[1];
71
72
73 cache[reg] = value;
74 return value;
75}
76
77static unsigned int aic26_reg_read_cache(struct snd_soc_codec *codec,
78 unsigned int reg)
79{
80 u16 *cache = codec->reg_cache;
81
82 if (reg >= AIC26_NUM_REGS) {
83 WARN_ON_ONCE(1);
84 return 0;
85 }
86
87 return cache[reg];
88}
89
90static int aic26_reg_write(struct snd_soc_codec *codec, unsigned int reg,
91 unsigned int value)
92{
93 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
94 u16 *cache = codec->reg_cache;
95 u16 cmd;
96 u8 buffer[4];
97 int rc;
98
99 if (reg >= AIC26_NUM_REGS) {
100 WARN_ON_ONCE(1);
101 return -EINVAL;
102 }
103
104
105
106 cmd = AIC26_WRITE_COMMAND_WORD(reg);
107 buffer[0] = (cmd >> 8) & 0xff;
108 buffer[1] = cmd & 0xff;
109 buffer[2] = value >> 8;
110 buffer[3] = value;
111 rc = spi_write(aic26->spi, buffer, 4);
112 if (rc) {
113 dev_err(&aic26->spi->dev, "AIC26 reg read error\n");
114 return -EIO;
115 }
116
117
118 cache[reg] = value;
119 return 0;
120}
121
122
123
124
125static int aic26_hw_params(struct snd_pcm_substream *substream,
126 struct snd_pcm_hw_params *params,
127 struct snd_soc_dai *dai)
128{
129 struct snd_soc_pcm_runtime *rtd = substream->private_data;
130 struct snd_soc_codec *codec = rtd->codec;
131 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
132 int fsref, divisor, wlen, pval, jval, dval, qval;
133 u16 reg;
134
135 dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n",
136 substream, params);
137 dev_dbg(&aic26->spi->dev, "rate=%i format=%i\n", params_rate(params),
138 params_format(params));
139
140 switch (params_rate(params)) {
141 case 8000: fsref = 48000; divisor = AIC26_DIV_6; break;
142 case 11025: fsref = 44100; divisor = AIC26_DIV_4; break;
143 case 12000: fsref = 48000; divisor = AIC26_DIV_4; break;
144 case 16000: fsref = 48000; divisor = AIC26_DIV_3; break;
145 case 22050: fsref = 44100; divisor = AIC26_DIV_2; break;
146 case 24000: fsref = 48000; divisor = AIC26_DIV_2; break;
147 case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break;
148 case 44100: fsref = 44100; divisor = AIC26_DIV_1; break;
149 case 48000: fsref = 48000; divisor = AIC26_DIV_1; break;
150 default:
151 dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL;
152 }
153
154
155 switch (params_format(params)) {
156 case SNDRV_PCM_FORMAT_S8: wlen = AIC26_WLEN_16; break;
157 case SNDRV_PCM_FORMAT_S16_BE: wlen = AIC26_WLEN_16; break;
158 case SNDRV_PCM_FORMAT_S24_BE: wlen = AIC26_WLEN_24; break;
159 case SNDRV_PCM_FORMAT_S32_BE: wlen = AIC26_WLEN_32; break;
160 default:
161 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
162 }
163
164
165
166
167
168
169 pval = 1;
170
171 jval = fsref / (aic26->mclk / 2048);
172
173 dval = fsref - (jval * (aic26->mclk / 2048));
174 dval = (10000 * dval) / (aic26->mclk / 2048);
175 dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval);
176 qval = 0;
177 reg = 0x8000 | qval << 11 | pval << 8 | jval << 2;
178 aic26_reg_write(codec, AIC26_REG_PLL_PROG1, reg);
179 reg = dval << 2;
180 aic26_reg_write(codec, AIC26_REG_PLL_PROG2, reg);
181
182
183 reg = aic26_reg_read_cache(codec, AIC26_REG_AUDIO_CTRL3);
184 reg &= ~0xf800;
185 if (aic26->master)
186 reg |= 0x0800;
187 if (fsref == 48000)
188 reg |= 0x2000;
189 aic26_reg_write(codec, AIC26_REG_AUDIO_CTRL3, reg);
190
191
192 reg = aic26_reg_read_cache(codec, AIC26_REG_AUDIO_CTRL1);
193 reg &= ~0x0fff;
194 reg |= wlen | aic26->datfm | (divisor << 3) | divisor;
195 aic26_reg_write(codec, AIC26_REG_AUDIO_CTRL1, reg);
196
197 return 0;
198}
199
200
201
202
203static int aic26_mute(struct snd_soc_dai *dai, int mute)
204{
205 struct snd_soc_codec *codec = dai->codec;
206 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
207 u16 reg = aic26_reg_read_cache(codec, AIC26_REG_DAC_GAIN);
208
209 dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n",
210 dai, mute);
211
212 if (mute)
213 reg |= 0x8080;
214 else
215 reg &= ~0x8080;
216 aic26_reg_write(codec, AIC26_REG_DAC_GAIN, reg);
217
218 return 0;
219}
220
221static int aic26_set_sysclk(struct snd_soc_dai *codec_dai,
222 int clk_id, unsigned int freq, int dir)
223{
224 struct snd_soc_codec *codec = codec_dai->codec;
225 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
226
227 dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i,"
228 " freq=%i, dir=%i)\n",
229 codec_dai, clk_id, freq, dir);
230
231
232 if ((freq < 2000000) || (freq > 50000000))
233 return -EINVAL;
234
235 aic26->mclk = freq;
236 return 0;
237}
238
239static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
240{
241 struct snd_soc_codec *codec = codec_dai->codec;
242 struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec);
243
244 dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n",
245 codec_dai, fmt);
246
247
248 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
249 case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break;
250 case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break;
251 default:
252 dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL;
253 }
254
255
256 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
257 case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break;
258 case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break;
259 case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break;
260 case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break;
261 default:
262 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
263 }
264
265 return 0;
266}
267
268
269
270
271#define AIC26_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
272 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
273 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
274 SNDRV_PCM_RATE_48000)
275#define AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\
276 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
277
278static struct snd_soc_dai_ops aic26_dai_ops = {
279 .hw_params = aic26_hw_params,
280 .digital_mute = aic26_mute,
281 .set_sysclk = aic26_set_sysclk,
282 .set_fmt = aic26_set_fmt,
283};
284
285static struct snd_soc_dai_driver aic26_dai = {
286 .name = "tlv320aic26-hifi",
287 .playback = {
288 .stream_name = "Playback",
289 .channels_min = 2,
290 .channels_max = 2,
291 .rates = AIC26_RATES,
292 .formats = AIC26_FORMATS,
293 },
294 .capture = {
295 .stream_name = "Capture",
296 .channels_min = 2,
297 .channels_max = 2,
298 .rates = AIC26_RATES,
299 .formats = AIC26_FORMATS,
300 },
301 .ops = &aic26_dai_ops,
302};
303
304
305
306
307static const char *aic26_capture_src_text[] = {"Mic", "Aux"};
308static const struct soc_enum aic26_capture_src_enum =
309 SOC_ENUM_SINGLE(AIC26_REG_AUDIO_CTRL1, 12, 2, aic26_capture_src_text);
310
311static const struct snd_kcontrol_new aic26_snd_controls[] = {
312
313 SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1),
314 SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1),
315 SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0),
316 SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1),
317 SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0),
318 SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0),
319 SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0),
320 SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0),
321 SOC_ENUM("Capture Source", aic26_capture_src_enum),
322};
323
324
325
326
327
328static ssize_t aic26_keyclick_show(struct device *dev,
329 struct device_attribute *attr, char *buf)
330{
331 struct aic26 *aic26 = dev_get_drvdata(dev);
332 int val, amp, freq, len;
333
334 val = aic26_reg_read_cache(&aic26->codec, AIC26_REG_AUDIO_CTRL2);
335 amp = (val >> 12) & 0x7;
336 freq = (125 << ((val >> 8) & 0x7)) >> 1;
337 len = 2 * (1 + ((val >> 4) & 0xf));
338
339 return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
340}
341
342
343static ssize_t aic26_keyclick_set(struct device *dev,
344 struct device_attribute *attr,
345 const char *buf, size_t count)
346{
347 struct aic26 *aic26 = dev_get_drvdata(dev);
348 int val;
349
350 val = aic26_reg_read_cache(&aic26->codec, AIC26_REG_AUDIO_CTRL2);
351 val |= 0x8000;
352 aic26_reg_write(&aic26->codec, AIC26_REG_AUDIO_CTRL2, val);
353
354 return count;
355}
356
357static DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set);
358
359
360
361
362static int aic26_probe(struct snd_soc_codec *codec)
363{
364 int ret, err, i, reg;
365
366 dev_info(codec->dev, "Probing AIC26 SoC CODEC driver\n");
367
368
369 aic26_reg_write(codec, AIC26_REG_RESET, 0xBB00);
370
371
372 aic26_reg_write(codec, AIC26_REG_POWER_CTRL, 0);
373
374
375 reg = aic26_reg_read(codec, AIC26_REG_AUDIO_CTRL3);
376 reg &= ~0xf800;
377 reg |= 0x0800;
378 aic26_reg_write(codec, AIC26_REG_AUDIO_CTRL3, reg);
379
380
381 for (i = 0; i < codec->driver->reg_cache_size; i++)
382 aic26_reg_read(codec, i);
383
384
385
386 ret = device_create_file(codec->dev, &dev_attr_keyclick);
387 if (ret)
388 dev_info(codec->dev, "error creating sysfs files\n");
389
390
391 dev_dbg(codec->dev, "Registering controls\n");
392 err = snd_soc_add_controls(codec, aic26_snd_controls,
393 ARRAY_SIZE(aic26_snd_controls));
394 WARN_ON(err < 0);
395
396 return 0;
397}
398
399static struct snd_soc_codec_driver aic26_soc_codec_dev = {
400 .probe = aic26_probe,
401 .read = aic26_reg_read,
402 .write = aic26_reg_write,
403 .reg_cache_size = AIC26_NUM_REGS,
404 .reg_word_size = sizeof(u16),
405};
406
407
408
409
410
411static int aic26_spi_probe(struct spi_device *spi)
412{
413 struct aic26 *aic26;
414 int ret;
415
416 dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n");
417
418
419 aic26 = kzalloc(sizeof *aic26, GFP_KERNEL);
420 if (!aic26)
421 return -ENOMEM;
422
423
424 aic26->spi = spi;
425 dev_set_drvdata(&spi->dev, aic26);
426 aic26->master = 1;
427
428 ret = snd_soc_register_codec(&spi->dev,
429 &aic26_soc_codec_dev, &aic26_dai, 1);
430 if (ret < 0)
431 kfree(aic26);
432 return ret;
433
434 dev_dbg(&spi->dev, "SPI device initialized\n");
435 return 0;
436}
437
438static int aic26_spi_remove(struct spi_device *spi)
439{
440 snd_soc_unregister_codec(&spi->dev);
441 kfree(spi_get_drvdata(spi));
442 return 0;
443}
444
445static struct spi_driver aic26_spi = {
446 .driver = {
447 .name = "tlv320aic26-codec",
448 .owner = THIS_MODULE,
449 },
450 .probe = aic26_spi_probe,
451 .remove = aic26_spi_remove,
452};
453
454static int __init aic26_init(void)
455{
456 return spi_register_driver(&aic26_spi);
457}
458module_init(aic26_init);
459
460static void __exit aic26_exit(void)
461{
462 spi_unregister_driver(&aic26_spi);
463}
464module_exit(aic26_exit);
465
