1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Texas Instruments TLV320AIC26 low power audio CODEC
4 * ALSA SoC CODEC driver
5 *
6 * Copyright (C) 2008 Secret Lab Technologies Ltd.
7 */
8
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/init.h>
12 #include <linux/delay.h>
13 #include <linux/pm.h>
14 #include <linux/device.h>
15 #include <linux/sysfs.h>
16 #include <linux/spi/spi.h>
17 #include <linux/slab.h>
18 #include <sound/core.h>
19 #include <sound/pcm.h>
20 #include <sound/pcm_params.h>
21 #include <sound/soc.h>
22 #include <sound/initval.h>
23
24 #include "tlv320aic26.h"
25
26 MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver");
27 MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
28 MODULE_LICENSE("GPL");
29
30 /* AIC26 driver private data */
31 struct aic26 {
32 struct spi_device *spi;
33 struct regmap *regmap;
34 struct snd_soc_component *component;
35 int clock_provider;
36 int datfm;
37 int mclk;
38
39 /* Keyclick parameters */
40 int keyclick_amplitude;
41 int keyclick_freq;
42 int keyclick_len;
43 };
44
45 static const struct snd_soc_dapm_widget tlv320aic26_dapm_widgets[] = {
46 SND_SOC_DAPM_INPUT("MICIN"),
47 SND_SOC_DAPM_INPUT("AUX"),
48
49 SND_SOC_DAPM_OUTPUT("HPL"),
50 SND_SOC_DAPM_OUTPUT("HPR"),
51 };
52
53 static const struct snd_soc_dapm_route tlv320aic26_dapm_routes[] = {
54 { "Capture", NULL, "MICIN" },
55 { "Capture", NULL, "AUX" },
56
57 { "HPL", NULL, "Playback" },
58 { "HPR", NULL, "Playback" },
59 };
60
61 /* ---------------------------------------------------------------------
62 * Digital Audio Interface Operations
63 */
aic26_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)64 static int aic26_hw_params(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params *params,
66 struct snd_soc_dai *dai)
67 {
68 struct snd_soc_component *component = dai->component;
69 struct aic26 *aic26 = snd_soc_component_get_drvdata(component);
70 int fsref, divisor, wlen, pval, jval, dval, qval;
71 u16 reg;
72
73 dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n",
74 substream, params);
75 dev_dbg(&aic26->spi->dev, "rate=%i width=%d\n", params_rate(params),
76 params_width(params));
77
78 switch (params_rate(params)) {
79 case 8000: fsref = 48000; divisor = AIC26_DIV_6; break;
80 case 11025: fsref = 44100; divisor = AIC26_DIV_4; break;
81 case 12000: fsref = 48000; divisor = AIC26_DIV_4; break;
82 case 16000: fsref = 48000; divisor = AIC26_DIV_3; break;
83 case 22050: fsref = 44100; divisor = AIC26_DIV_2; break;
84 case 24000: fsref = 48000; divisor = AIC26_DIV_2; break;
85 case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break;
86 case 44100: fsref = 44100; divisor = AIC26_DIV_1; break;
87 case 48000: fsref = 48000; divisor = AIC26_DIV_1; break;
88 default:
89 dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL;
90 }
91
92 /* select data word length */
93 switch (params_width(params)) {
94 case 8: wlen = AIC26_WLEN_16; break;
95 case 16: wlen = AIC26_WLEN_16; break;
96 case 24: wlen = AIC26_WLEN_24; break;
97 case 32: wlen = AIC26_WLEN_32; break;
98 default:
99 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
100 }
101
102 /**
103 * Configure PLL
104 * fsref = (mclk * PLLM) / 2048
105 * where PLLM = J.DDDD (DDDD register ranges from 0 to 9999, decimal)
106 */
107 pval = 1;
108 /* compute J portion of multiplier */
109 jval = fsref / (aic26->mclk / 2048);
110 /* compute fractional DDDD component of multiplier */
111 dval = fsref - (jval * (aic26->mclk / 2048));
112 dval = (10000 * dval) / (aic26->mclk / 2048);
113 dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval);
114 qval = 0;
115 reg = 0x8000 | qval << 11 | pval << 8 | jval << 2;
116 snd_soc_component_write(component, AIC26_REG_PLL_PROG1, reg);
117 reg = dval << 2;
118 snd_soc_component_write(component, AIC26_REG_PLL_PROG2, reg);
119
120 /* Audio Control 3 (clock provider mode, fsref rate) */
121 if (aic26->clock_provider)
122 reg = 0x0800;
123 if (fsref == 48000)
124 reg = 0x2000;
125 snd_soc_component_update_bits(component, AIC26_REG_AUDIO_CTRL3, 0xf800, reg);
126
127 /* Audio Control 1 (FSref divisor) */
128 reg = wlen | aic26->datfm | (divisor << 3) | divisor;
129 snd_soc_component_update_bits(component, AIC26_REG_AUDIO_CTRL1, 0xfff, reg);
130
131 return 0;
132 }
133
134 /*
135 * aic26_mute - Mute control to reduce noise when changing audio format
136 */
aic26_mute(struct snd_soc_dai * dai,int mute,int direction)137 static int aic26_mute(struct snd_soc_dai *dai, int mute, int direction)
138 {
139 struct snd_soc_component *component = dai->component;
140 struct aic26 *aic26 = snd_soc_component_get_drvdata(component);
141 u16 reg;
142
143 dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n",
144 dai, mute);
145
146 if (mute)
147 reg = 0x8080;
148 else
149 reg = 0;
150 snd_soc_component_update_bits(component, AIC26_REG_DAC_GAIN, 0x8000, reg);
151
152 return 0;
153 }
154
aic26_set_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)155 static int aic26_set_sysclk(struct snd_soc_dai *codec_dai,
156 int clk_id, unsigned int freq, int dir)
157 {
158 struct snd_soc_component *component = codec_dai->component;
159 struct aic26 *aic26 = snd_soc_component_get_drvdata(component);
160
161 dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i,"
162 " freq=%i, dir=%i)\n",
163 codec_dai, clk_id, freq, dir);
164
165 /* MCLK needs to fall between 2MHz and 50 MHz */
166 if ((freq < 2000000) || (freq > 50000000))
167 return -EINVAL;
168
169 aic26->mclk = freq;
170 return 0;
171 }
172
aic26_set_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)173 static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
174 {
175 struct snd_soc_component *component = codec_dai->component;
176 struct aic26 *aic26 = snd_soc_component_get_drvdata(component);
177
178 dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n",
179 codec_dai, fmt);
180
181 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
182 case SND_SOC_DAIFMT_CBP_CFP: aic26->clock_provider = 1; break;
183 case SND_SOC_DAIFMT_CBC_CFC: aic26->clock_provider = 0; break;
184 default:
185 dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL;
186 }
187
188 /* interface format */
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 * Digital Audio Interface Definition
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
211 static const struct snd_soc_dai_ops aic26_dai_ops = {
212 .hw_params = aic26_hw_params,
213 .mute_stream = aic26_mute,
214 .set_sysclk = aic26_set_sysclk,
215 .set_fmt = aic26_set_fmt,
216 .no_capture_mute = 1,
217 };
218
219 static struct snd_soc_dai_driver aic26_dai = {
220 .name = "tlv320aic26-hifi",
221 .playback = {
222 .stream_name = "Playback",
223 .channels_min = 2,
224 .channels_max = 2,
225 .rates = AIC26_RATES,
226 .formats = AIC26_FORMATS,
227 },
228 .capture = {
229 .stream_name = "Capture",
230 .channels_min = 2,
231 .channels_max = 2,
232 .rates = AIC26_RATES,
233 .formats = AIC26_FORMATS,
234 },
235 .ops = &aic26_dai_ops,
236 };
237
238 /* ---------------------------------------------------------------------
239 * ALSA controls
240 */
241 static const char *aic26_capture_src_text[] = {"Mic", "Aux"};
242 static SOC_ENUM_SINGLE_DECL(aic26_capture_src_enum,
243 AIC26_REG_AUDIO_CTRL1, 12,
244 aic26_capture_src_text);
245
246 static const struct snd_kcontrol_new aic26_snd_controls[] = {
247 /* Output */
248 SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1),
249 SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1),
250 SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0),
251 SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1),
252 SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0),
253 SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0),
254 SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0),
255 SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0),
256 SOC_ENUM("Capture Source", aic26_capture_src_enum),
257 };
258
259 /* ---------------------------------------------------------------------
260 * SPI device portion of driver: sysfs files for debugging
261 */
262
keyclick_show(struct device * dev,struct device_attribute * attr,char * buf)263 static ssize_t keyclick_show(struct device *dev,
264 struct device_attribute *attr, char *buf)
265 {
266 struct aic26 *aic26 = dev_get_drvdata(dev);
267 int val, amp, freq, len;
268
269 val = snd_soc_component_read(aic26->component, AIC26_REG_AUDIO_CTRL2);
270 amp = (val >> 12) & 0x7;
271 freq = (125 << ((val >> 8) & 0x7)) >> 1;
272 len = 2 * (1 + ((val >> 4) & 0xf));
273
274 return sysfs_emit(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
275 }
276
277 /* Any write to the keyclick attribute will trigger the keyclick event */
keyclick_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)278 static ssize_t keyclick_store(struct device *dev,
279 struct device_attribute *attr,
280 const char *buf, size_t count)
281 {
282 struct aic26 *aic26 = dev_get_drvdata(dev);
283
284 snd_soc_component_update_bits(aic26->component, AIC26_REG_AUDIO_CTRL2,
285 0x8000, 0x800);
286
287 return count;
288 }
289
290 static DEVICE_ATTR_RW(keyclick);
291
292 /* ---------------------------------------------------------------------
293 * SoC CODEC portion of driver: probe and release routines
294 */
aic26_probe(struct snd_soc_component * component)295 static int aic26_probe(struct snd_soc_component *component)
296 {
297 struct aic26 *aic26 = dev_get_drvdata(component->dev);
298 int ret, reg;
299
300 aic26->component = component;
301
302 /* Reset the codec to power on defaults */
303 snd_soc_component_write(component, AIC26_REG_RESET, 0xBB00);
304
305 /* Power up CODEC */
306 snd_soc_component_write(component, AIC26_REG_POWER_CTRL, 0);
307
308 /* Audio Control 3 (master mode, fsref rate) */
309 reg = snd_soc_component_read(component, AIC26_REG_AUDIO_CTRL3);
310 reg &= ~0xf800;
311 reg |= 0x0800; /* set master mode */
312 snd_soc_component_write(component, AIC26_REG_AUDIO_CTRL3, reg);
313
314 /* Register the sysfs files for debugging */
315 /* Create SysFS files */
316 ret = device_create_file(component->dev, &dev_attr_keyclick);
317 if (ret)
318 dev_info(component->dev, "error creating sysfs files\n");
319
320 return 0;
321 }
322
323 static const struct snd_soc_component_driver aic26_soc_component_dev = {
324 .probe = aic26_probe,
325 .controls = aic26_snd_controls,
326 .num_controls = ARRAY_SIZE(aic26_snd_controls),
327 .dapm_widgets = tlv320aic26_dapm_widgets,
328 .num_dapm_widgets = ARRAY_SIZE(tlv320aic26_dapm_widgets),
329 .dapm_routes = tlv320aic26_dapm_routes,
330 .num_dapm_routes = ARRAY_SIZE(tlv320aic26_dapm_routes),
331 .idle_bias_on = 1,
332 .use_pmdown_time = 1,
333 .endianness = 1,
334 };
335
336 static const struct regmap_config aic26_regmap = {
337 .reg_bits = 16,
338 .val_bits = 16,
339 };
340
341 /* ---------------------------------------------------------------------
342 * SPI device portion of driver: probe and release routines and SPI
343 * driver registration.
344 */
aic26_spi_probe(struct spi_device * spi)345 static int aic26_spi_probe(struct spi_device *spi)
346 {
347 struct aic26 *aic26;
348 int ret;
349
350 dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n");
351
352 /* Allocate driver data */
353 aic26 = devm_kzalloc(&spi->dev, sizeof *aic26, GFP_KERNEL);
354 if (!aic26)
355 return -ENOMEM;
356
357 aic26->regmap = devm_regmap_init_spi(spi, &aic26_regmap);
358 if (IS_ERR(aic26->regmap))
359 return PTR_ERR(aic26->regmap);
360
361 /* Initialize the driver data */
362 aic26->spi = spi;
363 dev_set_drvdata(&spi->dev, aic26);
364 aic26->clock_provider = 1;
365
366 ret = devm_snd_soc_register_component(&spi->dev,
367 &aic26_soc_component_dev, &aic26_dai, 1);
368 return ret;
369 }
370
371 static struct spi_driver aic26_spi = {
372 .driver = {
373 .name = "tlv320aic26-codec",
374 },
375 .probe = aic26_spi_probe,
376 };
377
378 module_spi_driver(aic26_spi);
379