Commit | Line | Data |
---|---|---|
d8e3bb73 GL |
1 | /* |
2 | * Texas Instruments TLV320AIC26 low power audio CODEC | |
3 | * ALSA SoC CODEC driver | |
4 | * | |
5 | * Copyright (C) 2008 Secret Lab Technologies Ltd. | |
6 | */ | |
7 | ||
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> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
d8e3bb73 GL |
17 | #include <sound/core.h> |
18 | #include <sound/pcm.h> | |
19 | #include <sound/pcm_params.h> | |
20 | #include <sound/soc.h> | |
d8e3bb73 GL |
21 | #include <sound/initval.h> |
22 | ||
23 | #include "tlv320aic26.h" | |
24 | ||
25 | MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver"); | |
26 | MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>"); | |
27 | MODULE_LICENSE("GPL"); | |
28 | ||
29 | /* AIC26 driver private data */ | |
30 | struct aic26 { | |
31 | struct spi_device *spi; | |
f8f11795 | 32 | struct snd_soc_codec *codec; |
d8e3bb73 GL |
33 | int master; |
34 | int datfm; | |
35 | int mclk; | |
36 | ||
37 | /* Keyclick parameters */ | |
38 | int keyclick_amplitude; | |
39 | int keyclick_freq; | |
40 | int keyclick_len; | |
41 | }; | |
42 | ||
43 | /* --------------------------------------------------------------------- | |
44 | * Register access routines | |
45 | */ | |
46 | static unsigned int aic26_reg_read(struct snd_soc_codec *codec, | |
47 | unsigned int reg) | |
48 | { | |
d4a8ca24 | 49 | struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec); |
d8e3bb73 GL |
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 | /* Do SPI transfer; first 16bits are command; remaining is | |
61 | * register contents */ | |
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 | /* Update the cache before returning with the value */ | |
73 | cache[reg] = value; | |
74 | return value; | |
75 | } | |
76 | ||
d8e3bb73 GL |
77 | static int aic26_reg_write(struct snd_soc_codec *codec, unsigned int reg, |
78 | unsigned int value) | |
79 | { | |
d4a8ca24 | 80 | struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec); |
d8e3bb73 GL |
81 | u16 *cache = codec->reg_cache; |
82 | u16 cmd; | |
83 | u8 buffer[4]; | |
84 | int rc; | |
85 | ||
86 | if (reg >= AIC26_NUM_REGS) { | |
87 | WARN_ON_ONCE(1); | |
88 | return -EINVAL; | |
89 | } | |
90 | ||
91 | /* Do SPI transfer; first 16bits are command; remaining is data | |
92 | * to write into register */ | |
93 | cmd = AIC26_WRITE_COMMAND_WORD(reg); | |
94 | buffer[0] = (cmd >> 8) & 0xff; | |
95 | buffer[1] = cmd & 0xff; | |
96 | buffer[2] = value >> 8; | |
97 | buffer[3] = value; | |
98 | rc = spi_write(aic26->spi, buffer, 4); | |
99 | if (rc) { | |
100 | dev_err(&aic26->spi->dev, "AIC26 reg read error\n"); | |
101 | return -EIO; | |
102 | } | |
103 | ||
104 | /* update cache before returning */ | |
105 | cache[reg] = value; | |
106 | return 0; | |
107 | } | |
108 | ||
4a11bc2f MB |
109 | static const struct snd_soc_dapm_widget tlv320aic26_dapm_widgets[] = { |
110 | SND_SOC_DAPM_INPUT("MICIN"), | |
111 | SND_SOC_DAPM_INPUT("AUX"), | |
112 | ||
113 | SND_SOC_DAPM_OUTPUT("HPL"), | |
114 | SND_SOC_DAPM_OUTPUT("HPR"), | |
115 | }; | |
116 | ||
117 | static const struct snd_soc_dapm_route tlv320aic26_dapm_routes[] = { | |
118 | { "Capture", NULL, "MICIN" }, | |
119 | { "Capture", NULL, "AUX" }, | |
120 | ||
121 | { "HPL", NULL, "Playback" }, | |
122 | { "HPR", NULL, "Playback" }, | |
123 | }; | |
124 | ||
d8e3bb73 GL |
125 | /* --------------------------------------------------------------------- |
126 | * Digital Audio Interface Operations | |
127 | */ | |
128 | static int aic26_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
129 | struct snd_pcm_hw_params *params, |
130 | struct snd_soc_dai *dai) | |
d8e3bb73 | 131 | { |
e6968a17 | 132 | struct snd_soc_codec *codec = dai->codec; |
d4a8ca24 | 133 | struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec); |
d8e3bb73 GL |
134 | int fsref, divisor, wlen, pval, jval, dval, qval; |
135 | u16 reg; | |
136 | ||
137 | dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n", | |
138 | substream, params); | |
139 | dev_dbg(&aic26->spi->dev, "rate=%i format=%i\n", params_rate(params), | |
140 | params_format(params)); | |
141 | ||
142 | switch (params_rate(params)) { | |
143 | case 8000: fsref = 48000; divisor = AIC26_DIV_6; break; | |
144 | case 11025: fsref = 44100; divisor = AIC26_DIV_4; break; | |
145 | case 12000: fsref = 48000; divisor = AIC26_DIV_4; break; | |
146 | case 16000: fsref = 48000; divisor = AIC26_DIV_3; break; | |
147 | case 22050: fsref = 44100; divisor = AIC26_DIV_2; break; | |
148 | case 24000: fsref = 48000; divisor = AIC26_DIV_2; break; | |
149 | case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break; | |
150 | case 44100: fsref = 44100; divisor = AIC26_DIV_1; break; | |
151 | case 48000: fsref = 48000; divisor = AIC26_DIV_1; break; | |
152 | default: | |
153 | dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL; | |
154 | } | |
155 | ||
156 | /* select data word length */ | |
157 | switch (params_format(params)) { | |
158 | case SNDRV_PCM_FORMAT_S8: wlen = AIC26_WLEN_16; break; | |
159 | case SNDRV_PCM_FORMAT_S16_BE: wlen = AIC26_WLEN_16; break; | |
160 | case SNDRV_PCM_FORMAT_S24_BE: wlen = AIC26_WLEN_24; break; | |
161 | case SNDRV_PCM_FORMAT_S32_BE: wlen = AIC26_WLEN_32; break; | |
162 | default: | |
163 | dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL; | |
164 | } | |
165 | ||
2aba76f0 MW |
166 | /** |
167 | * Configure PLL | |
168 | * fsref = (mclk * PLLM) / 2048 | |
169 | * where PLLM = J.DDDD (DDDD register ranges from 0 to 9999, decimal) | |
170 | */ | |
d8e3bb73 | 171 | pval = 1; |
2aba76f0 MW |
172 | /* compute J portion of multiplier */ |
173 | jval = fsref / (aic26->mclk / 2048); | |
174 | /* compute fractional DDDD component of multiplier */ | |
175 | dval = fsref - (jval * (aic26->mclk / 2048)); | |
176 | dval = (10000 * dval) / (aic26->mclk / 2048); | |
177 | dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval); | |
d8e3bb73 GL |
178 | qval = 0; |
179 | reg = 0x8000 | qval << 11 | pval << 8 | jval << 2; | |
12201398 | 180 | snd_soc_write(codec, AIC26_REG_PLL_PROG1, reg); |
d8e3bb73 | 181 | reg = dval << 2; |
12201398 | 182 | snd_soc_write(codec, AIC26_REG_PLL_PROG2, reg); |
d8e3bb73 GL |
183 | |
184 | /* Audio Control 3 (master mode, fsref rate) */ | |
d8e3bb73 | 185 | if (aic26->master) |
5b0959d4 | 186 | reg = 0x0800; |
d8e3bb73 | 187 | if (fsref == 48000) |
5b0959d4 MB |
188 | reg = 0x2000; |
189 | snd_soc_update_bits(codec, AIC26_REG_AUDIO_CTRL3, 0xf800, reg); | |
d8e3bb73 GL |
190 | |
191 | /* Audio Control 1 (FSref divisor) */ | |
5b0959d4 MB |
192 | reg = wlen | aic26->datfm | (divisor << 3) | divisor; |
193 | snd_soc_update_bits(codec, AIC26_REG_AUDIO_CTRL1, 0xfff, reg); | |
d8e3bb73 GL |
194 | |
195 | return 0; | |
196 | } | |
197 | ||
198 | /** | |
199 | * aic26_mute - Mute control to reduce noise when changing audio format | |
200 | */ | |
201 | static int aic26_mute(struct snd_soc_dai *dai, int mute) | |
202 | { | |
203 | struct snd_soc_codec *codec = dai->codec; | |
d4a8ca24 | 204 | struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec); |
5b0959d4 | 205 | u16 reg; |
d8e3bb73 GL |
206 | |
207 | dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n", | |
208 | dai, mute); | |
209 | ||
210 | if (mute) | |
5b0959d4 | 211 | reg = 0x8080; |
d8e3bb73 | 212 | else |
5b0959d4 MB |
213 | reg = 0; |
214 | snd_soc_update_bits(codec, AIC26_REG_DAC_GAIN, 0x8000, reg); | |
d8e3bb73 GL |
215 | |
216 | return 0; | |
217 | } | |
218 | ||
219 | static int aic26_set_sysclk(struct snd_soc_dai *codec_dai, | |
220 | int clk_id, unsigned int freq, int dir) | |
221 | { | |
222 | struct snd_soc_codec *codec = codec_dai->codec; | |
d4a8ca24 | 223 | struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec); |
d8e3bb73 GL |
224 | |
225 | dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i," | |
226 | " freq=%i, dir=%i)\n", | |
227 | codec_dai, clk_id, freq, dir); | |
228 | ||
229 | /* MCLK needs to fall between 2MHz and 50 MHz */ | |
230 | if ((freq < 2000000) || (freq > 50000000)) | |
231 | return -EINVAL; | |
232 | ||
233 | aic26->mclk = freq; | |
234 | return 0; | |
235 | } | |
236 | ||
237 | static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) | |
238 | { | |
239 | struct snd_soc_codec *codec = codec_dai->codec; | |
d4a8ca24 | 240 | struct aic26 *aic26 = snd_soc_codec_get_drvdata(codec); |
d8e3bb73 GL |
241 | |
242 | dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n", | |
243 | codec_dai, fmt); | |
244 | ||
245 | /* set master/slave audio interface */ | |
246 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
247 | case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break; | |
248 | case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break; | |
249 | default: | |
250 | dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL; | |
251 | } | |
252 | ||
253 | /* interface format */ | |
254 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
255 | case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break; | |
256 | case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break; | |
257 | case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break; | |
258 | case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break; | |
259 | default: | |
260 | dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL; | |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | /* --------------------------------------------------------------------- | |
267 | * Digital Audio Interface Definition | |
268 | */ | |
269 | #define AIC26_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ | |
270 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ | |
271 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ | |
272 | SNDRV_PCM_RATE_48000) | |
273 | #define AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\ | |
274 | SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE) | |
275 | ||
85e7652d | 276 | static const struct snd_soc_dai_ops aic26_dai_ops = { |
6335d055 EM |
277 | .hw_params = aic26_hw_params, |
278 | .digital_mute = aic26_mute, | |
279 | .set_sysclk = aic26_set_sysclk, | |
280 | .set_fmt = aic26_set_fmt, | |
281 | }; | |
282 | ||
f0fba2ad LG |
283 | static struct snd_soc_dai_driver aic26_dai = { |
284 | .name = "tlv320aic26-hifi", | |
d8e3bb73 GL |
285 | .playback = { |
286 | .stream_name = "Playback", | |
287 | .channels_min = 2, | |
288 | .channels_max = 2, | |
289 | .rates = AIC26_RATES, | |
290 | .formats = AIC26_FORMATS, | |
291 | }, | |
292 | .capture = { | |
293 | .stream_name = "Capture", | |
294 | .channels_min = 2, | |
295 | .channels_max = 2, | |
296 | .rates = AIC26_RATES, | |
297 | .formats = AIC26_FORMATS, | |
298 | }, | |
6335d055 | 299 | .ops = &aic26_dai_ops, |
d8e3bb73 | 300 | }; |
d8e3bb73 GL |
301 | |
302 | /* --------------------------------------------------------------------- | |
303 | * ALSA controls | |
304 | */ | |
305 | static const char *aic26_capture_src_text[] = {"Mic", "Aux"}; | |
306 | static const struct soc_enum aic26_capture_src_enum = | |
307 | SOC_ENUM_SINGLE(AIC26_REG_AUDIO_CTRL1, 12, 2, aic26_capture_src_text); | |
308 | ||
309 | static const struct snd_kcontrol_new aic26_snd_controls[] = { | |
310 | /* Output */ | |
311 | SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1), | |
312 | SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1), | |
313 | SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0), | |
314 | SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1), | |
315 | SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0), | |
316 | SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0), | |
317 | SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0), | |
318 | SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0), | |
319 | SOC_ENUM("Capture Source", aic26_capture_src_enum), | |
320 | }; | |
321 | ||
d8e3bb73 GL |
322 | /* --------------------------------------------------------------------- |
323 | * SPI device portion of driver: sysfs files for debugging | |
324 | */ | |
325 | ||
326 | static ssize_t aic26_keyclick_show(struct device *dev, | |
327 | struct device_attribute *attr, char *buf) | |
328 | { | |
329 | struct aic26 *aic26 = dev_get_drvdata(dev); | |
330 | int val, amp, freq, len; | |
331 | ||
5b0959d4 | 332 | val = snd_soc_read(aic26->codec, AIC26_REG_AUDIO_CTRL2); |
d8e3bb73 GL |
333 | amp = (val >> 12) & 0x7; |
334 | freq = (125 << ((val >> 8) & 0x7)) >> 1; | |
335 | len = 2 * (1 + ((val >> 4) & 0xf)); | |
336 | ||
337 | return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len); | |
338 | } | |
339 | ||
340 | /* Any write to the keyclick attribute will trigger the keyclick event */ | |
341 | static ssize_t aic26_keyclick_set(struct device *dev, | |
342 | struct device_attribute *attr, | |
343 | const char *buf, size_t count) | |
344 | { | |
345 | struct aic26 *aic26 = dev_get_drvdata(dev); | |
d8e3bb73 | 346 | |
5b0959d4 MB |
347 | snd_soc_update_bits(aic26->codec, AIC26_REG_AUDIO_CTRL2, |
348 | 0x8000, 0x800); | |
d8e3bb73 GL |
349 | |
350 | return count; | |
351 | } | |
352 | ||
9cce39a1 | 353 | static DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set); |
d8e3bb73 GL |
354 | |
355 | /* --------------------------------------------------------------------- | |
f0fba2ad | 356 | * SoC CODEC portion of driver: probe and release routines |
d8e3bb73 | 357 | */ |
f0fba2ad | 358 | static int aic26_probe(struct snd_soc_codec *codec) |
d8e3bb73 | 359 | { |
f8f11795 | 360 | struct aic26 *aic26 = dev_get_drvdata(codec->dev); |
5b0959d4 | 361 | int ret, reg; |
d8e3bb73 | 362 | |
f8f11795 LPC |
363 | aic26->codec = codec; |
364 | ||
d8e3bb73 | 365 | /* Reset the codec to power on defaults */ |
12201398 | 366 | snd_soc_write(codec, AIC26_REG_RESET, 0xBB00); |
d8e3bb73 GL |
367 | |
368 | /* Power up CODEC */ | |
12201398 | 369 | snd_soc_write(codec, AIC26_REG_POWER_CTRL, 0); |
d8e3bb73 GL |
370 | |
371 | /* Audio Control 3 (master mode, fsref rate) */ | |
12201398 | 372 | reg = snd_soc_read(codec, AIC26_REG_AUDIO_CTRL3); |
d8e3bb73 GL |
373 | reg &= ~0xf800; |
374 | reg |= 0x0800; /* set master mode */ | |
12201398 | 375 | snd_soc_write(codec, AIC26_REG_AUDIO_CTRL3, reg); |
d8e3bb73 | 376 | |
d8e3bb73 GL |
377 | /* Register the sysfs files for debugging */ |
378 | /* Create SysFS files */ | |
f0fba2ad | 379 | ret = device_create_file(codec->dev, &dev_attr_keyclick); |
64089b84 | 380 | if (ret) |
f0fba2ad | 381 | dev_info(codec->dev, "error creating sysfs files\n"); |
d8e3bb73 | 382 | |
d8e3bb73 GL |
383 | return 0; |
384 | } | |
385 | ||
f0fba2ad LG |
386 | static struct snd_soc_codec_driver aic26_soc_codec_dev = { |
387 | .probe = aic26_probe, | |
388 | .read = aic26_reg_read, | |
389 | .write = aic26_reg_write, | |
806955dd MB |
390 | .controls = aic26_snd_controls, |
391 | .num_controls = ARRAY_SIZE(aic26_snd_controls), | |
4a11bc2f MB |
392 | .dapm_widgets = tlv320aic26_dapm_widgets, |
393 | .num_dapm_widgets = ARRAY_SIZE(tlv320aic26_dapm_widgets), | |
394 | .dapm_routes = tlv320aic26_dapm_routes, | |
395 | .num_dapm_routes = ARRAY_SIZE(tlv320aic26_dapm_routes), | |
f0fba2ad LG |
396 | }; |
397 | ||
398 | /* --------------------------------------------------------------------- | |
399 | * SPI device portion of driver: probe and release routines and SPI | |
400 | * driver registration. | |
401 | */ | |
402 | static int aic26_spi_probe(struct spi_device *spi) | |
d8e3bb73 | 403 | { |
f0fba2ad LG |
404 | struct aic26 *aic26; |
405 | int ret; | |
d8e3bb73 | 406 | |
f0fba2ad LG |
407 | dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n"); |
408 | ||
409 | /* Allocate driver data */ | |
a8163023 | 410 | aic26 = devm_kzalloc(&spi->dev, sizeof *aic26, GFP_KERNEL); |
f0fba2ad LG |
411 | if (!aic26) |
412 | return -ENOMEM; | |
d8e3bb73 | 413 | |
f0fba2ad LG |
414 | /* Initialize the driver data */ |
415 | aic26->spi = spi; | |
416 | dev_set_drvdata(&spi->dev, aic26); | |
417 | aic26->master = 1; | |
418 | ||
419 | ret = snd_soc_register_codec(&spi->dev, | |
420 | &aic26_soc_codec_dev, &aic26_dai, 1); | |
f0fba2ad | 421 | return ret; |
f0fba2ad LG |
422 | } |
423 | ||
424 | static int aic26_spi_remove(struct spi_device *spi) | |
425 | { | |
426 | snd_soc_unregister_codec(&spi->dev); | |
d8e3bb73 GL |
427 | return 0; |
428 | } | |
429 | ||
430 | static struct spi_driver aic26_spi = { | |
431 | .driver = { | |
f0fba2ad | 432 | .name = "tlv320aic26-codec", |
d8e3bb73 GL |
433 | .owner = THIS_MODULE, |
434 | }, | |
435 | .probe = aic26_spi_probe, | |
436 | .remove = aic26_spi_remove, | |
437 | }; | |
438 | ||
9bb280a2 | 439 | module_spi_driver(aic26_spi); |