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x86/speculation/mds: Fix documentation typo
[linux/fpc-iii.git] / sound / soc / codecs / cs42l51.c
blobf8072f1897d4c47a7d91c9c6d00eedffd9ef2fba
1 /*
2 * cs42l51.c
3 *
4 * ASoC Driver for Cirrus Logic CS42L51 codecs
5 *
6 * Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
7 *
8 * Based on cs4270.c - Copyright (c) Freescale Semiconductor
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * For now:
20 * - Only I2C is support. Not SPI
21 * - master mode *NOT* supported
22 */
23
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <sound/core.h>
27 #include <sound/soc.h>
28 #include <sound/tlv.h>
29 #include <sound/initval.h>
30 #include <sound/pcm_params.h>
31 #include <sound/pcm.h>
32 #include <linux/regmap.h>
33
34 #include "cs42l51.h"
35
36 enum master_slave_mode {
37 MODE_SLAVE,
38 MODE_SLAVE_AUTO,
39 MODE_MASTER,
40 };
41
42 struct cs42l51_private {
43 unsigned int mclk;
44 unsigned int audio_mode; /* The mode (I2S or left-justified) */
45 enum master_slave_mode func;
46 };
47
48 #define CS42L51_FORMATS ( \
49 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
50 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
51 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
52 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
53
54 static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
55 struct snd_ctl_elem_value *ucontrol)
56 {
57 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
58 unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
59
60 switch (value) {
61 default:
62 case 0:
63 ucontrol->value.enumerated.item[0] = 0;
64 break;
65 /* same value : (L+R)/2 and (R+L)/2 */
66 case 1:
67 case 2:
68 ucontrol->value.enumerated.item[0] = 1;
69 break;
70 case 3:
71 ucontrol->value.enumerated.item[0] = 2;
72 break;
73 }
74
75 return 0;
76 }
77
78 #define CHAN_MIX_NORMAL 0x00
79 #define CHAN_MIX_BOTH 0x55
80 #define CHAN_MIX_SWAP 0xFF
81
82 static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
83 struct snd_ctl_elem_value *ucontrol)
84 {
85 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
86 unsigned char val;
87
88 switch (ucontrol->value.enumerated.item[0]) {
89 default:
90 case 0:
91 val = CHAN_MIX_NORMAL;
92 break;
93 case 1:
94 val = CHAN_MIX_BOTH;
95 break;
96 case 2:
97 val = CHAN_MIX_SWAP;
98 break;
99 }
100
101 snd_soc_write(codec, CS42L51_PCM_MIXER, val);
102
103 return 1;
104 }
105
106 static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
107 static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
108
109 static const DECLARE_TLV_DB_SCALE(aout_tlv, -10200, 50, 0);
110
111 static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
112 static const char *chan_mix[] = {
113 "L R",
114 "L+R",
115 "R L",
116 };
117
118 static SOC_ENUM_SINGLE_EXT_DECL(cs42l51_chan_mix, chan_mix);
119
120 static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
121 SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
122 CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
123 0, 0x19, 0x7F, adc_pcm_tlv),
124 SOC_DOUBLE_R("PCM Playback Switch",
125 CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
126 SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
127 CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
128 0, 0x34, 0xE4, aout_tlv),
129 SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
130 CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
131 0, 0x19, 0x7F, adc_pcm_tlv),
132 SOC_DOUBLE_R("ADC Mixer Switch",
133 CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
134 SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
135 SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
136 SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
137 SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
138 SOC_DOUBLE_TLV("Mic Boost Volume",
139 CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
140 SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
141 SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
142 SOC_ENUM_EXT("PCM channel mixer",
143 cs42l51_chan_mix,
144 cs42l51_get_chan_mix, cs42l51_set_chan_mix),
145 };
146
147 /*
148 * to power down, one must:
149 * 1.) Enable the PDN bit
150 * 2.) enable power-down for the select channels
151 * 3.) disable the PDN bit.
152 */
153 static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
154 struct snd_kcontrol *kcontrol, int event)
155 {
156 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
157
158 switch (event) {
159 case SND_SOC_DAPM_PRE_PMD:
160 snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
161 CS42L51_POWER_CTL1_PDN,
162 CS42L51_POWER_CTL1_PDN);
163 break;
164 default:
165 case SND_SOC_DAPM_POST_PMD:
166 snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
167 CS42L51_POWER_CTL1_PDN, 0);
168 break;
169 }
170
171 return 0;
172 }
173
174 static const char *cs42l51_dac_names[] = {"Direct PCM",
175 "DSP PCM", "ADC"};
176 static SOC_ENUM_SINGLE_DECL(cs42l51_dac_mux_enum,
177 CS42L51_DAC_CTL, 6, cs42l51_dac_names);
178 static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
179 SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
180
181 static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
182 "MIC Left", "MIC+preamp Left"};
183 static SOC_ENUM_SINGLE_DECL(cs42l51_adcl_mux_enum,
184 CS42L51_ADC_INPUT, 4, cs42l51_adcl_names);
185 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
186 SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
187
188 static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
189 "MIC Right", "MIC+preamp Right"};
190 static SOC_ENUM_SINGLE_DECL(cs42l51_adcr_mux_enum,
191 CS42L51_ADC_INPUT, 6, cs42l51_adcr_names);
192 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
193 SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
194
195 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
196 SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
197 SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
198 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
199 SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
200 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
201 SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
202 CS42L51_POWER_CTL1, 1, 1,
203 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
204 SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
205 CS42L51_POWER_CTL1, 2, 1,
206 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
207 SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
208 CS42L51_POWER_CTL1, 5, 1,
209 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
210 SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
211 CS42L51_POWER_CTL1, 6, 1,
212 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
213
214 /* analog/mic */
215 SND_SOC_DAPM_INPUT("AIN1L"),
216 SND_SOC_DAPM_INPUT("AIN1R"),
217 SND_SOC_DAPM_INPUT("AIN2L"),
218 SND_SOC_DAPM_INPUT("AIN2R"),
219 SND_SOC_DAPM_INPUT("MICL"),
220 SND_SOC_DAPM_INPUT("MICR"),
221
222 SND_SOC_DAPM_MIXER("Mic Preamp Left",
223 CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
224 SND_SOC_DAPM_MIXER("Mic Preamp Right",
225 CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
226
227 /* HP */
228 SND_SOC_DAPM_OUTPUT("HPL"),
229 SND_SOC_DAPM_OUTPUT("HPR"),
230
231 /* mux */
232 SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
233 &cs42l51_dac_mux_controls),
234 SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
235 &cs42l51_adcl_mux_controls),
236 SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
237 &cs42l51_adcr_mux_controls),
238 };
239
240 static const struct snd_soc_dapm_route cs42l51_routes[] = {
241 {"HPL", NULL, "Left DAC"},
242 {"HPR", NULL, "Right DAC"},
243
244 {"Left ADC", NULL, "Left PGA"},
245 {"Right ADC", NULL, "Right PGA"},
246
247 {"Mic Preamp Left", NULL, "MICL"},
248 {"Mic Preamp Right", NULL, "MICR"},
249
250 {"PGA-ADC Mux Left", "AIN1 Left", "AIN1L" },
251 {"PGA-ADC Mux Left", "AIN2 Left", "AIN2L" },
252 {"PGA-ADC Mux Left", "MIC Left", "MICL" },
253 {"PGA-ADC Mux Left", "MIC+preamp Left", "Mic Preamp Left" },
254 {"PGA-ADC Mux Right", "AIN1 Right", "AIN1R" },
255 {"PGA-ADC Mux Right", "AIN2 Right", "AIN2R" },
256 {"PGA-ADC Mux Right", "MIC Right", "MICR" },
257 {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
258
259 {"Left PGA", NULL, "PGA-ADC Mux Left"},
260 {"Right PGA", NULL, "PGA-ADC Mux Right"},
261 };
262
263 static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
264 unsigned int format)
265 {
266 struct snd_soc_codec *codec = codec_dai->codec;
267 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
268
269 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
270 case SND_SOC_DAIFMT_I2S:
271 case SND_SOC_DAIFMT_LEFT_J:
272 case SND_SOC_DAIFMT_RIGHT_J:
273 cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
274 break;
275 default:
276 dev_err(codec->dev, "invalid DAI format\n");
277 return -EINVAL;
278 }
279
280 switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
281 case SND_SOC_DAIFMT_CBM_CFM:
282 cs42l51->func = MODE_MASTER;
283 break;
284 case SND_SOC_DAIFMT_CBS_CFS:
285 cs42l51->func = MODE_SLAVE_AUTO;
286 break;
287 default:
288 dev_err(codec->dev, "Unknown master/slave configuration\n");
289 return -EINVAL;
290 }
291
292 return 0;
293 }
294
295 struct cs42l51_ratios {
296 unsigned int ratio;
297 unsigned char speed_mode;
298 unsigned char mclk;
299 };
300
301 static struct cs42l51_ratios slave_ratios[] = {
302 { 512, CS42L51_QSM_MODE, 0 }, { 768, CS42L51_QSM_MODE, 0 },
303 { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
304 { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
305 { 256, CS42L51_HSM_MODE, 0 }, { 384, CS42L51_HSM_MODE, 0 },
306 { 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
307 { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
308 { 128, CS42L51_SSM_MODE, 0 }, { 192, CS42L51_SSM_MODE, 0 },
309 { 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
310 { 512, CS42L51_SSM_MODE, 0 }, { 768, CS42L51_SSM_MODE, 0 },
311 { 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
312 { 256, CS42L51_DSM_MODE, 0 }, { 384, CS42L51_DSM_MODE, 0 },
313 };
314
315 static struct cs42l51_ratios slave_auto_ratios[] = {
316 { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
317 { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
318 { 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
319 { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
320 { 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
321 { 512, CS42L51_SSM_MODE, 1 }, { 768, CS42L51_SSM_MODE, 1 },
322 { 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
323 { 256, CS42L51_DSM_MODE, 1 }, { 384, CS42L51_DSM_MODE, 1 },
324 };
325
326 static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
327 int clk_id, unsigned int freq, int dir)
328 {
329 struct snd_soc_codec *codec = codec_dai->codec;
330 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
331
332 cs42l51->mclk = freq;
333 return 0;
334 }
335
336 static int cs42l51_hw_params(struct snd_pcm_substream *substream,
337 struct snd_pcm_hw_params *params,
338 struct snd_soc_dai *dai)
339 {
340 struct snd_soc_codec *codec = dai->codec;
341 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
342 int ret;
343 unsigned int i;
344 unsigned int rate;
345 unsigned int ratio;
346 struct cs42l51_ratios *ratios = NULL;
347 int nr_ratios = 0;
348 int intf_ctl, power_ctl, fmt;
349
350 switch (cs42l51->func) {
351 case MODE_MASTER:
352 return -EINVAL;
353 case MODE_SLAVE:
354 ratios = slave_ratios;
355 nr_ratios = ARRAY_SIZE(slave_ratios);
356 break;
357 case MODE_SLAVE_AUTO:
358 ratios = slave_auto_ratios;
359 nr_ratios = ARRAY_SIZE(slave_auto_ratios);
360 break;
361 }
362
363 /* Figure out which MCLK/LRCK ratio to use */
364 rate = params_rate(params); /* Sampling rate, in Hz */
365 ratio = cs42l51->mclk / rate; /* MCLK/LRCK ratio */
366 for (i = 0; i < nr_ratios; i++) {
367 if (ratios[i].ratio == ratio)
368 break;
369 }
370
371 if (i == nr_ratios) {
372 /* We did not find a matching ratio */
373 dev_err(codec->dev, "could not find matching ratio\n");
374 return -EINVAL;
375 }
376
377 intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
378 power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
379
380 intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
381 | CS42L51_INTF_CTL_DAC_FORMAT(7));
382 power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
383 | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
384
385 switch (cs42l51->func) {
386 case MODE_MASTER:
387 intf_ctl |= CS42L51_INTF_CTL_MASTER;
388 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
389 break;
390 case MODE_SLAVE:
391 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
392 break;
393 case MODE_SLAVE_AUTO:
394 power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
395 break;
396 }
397
398 switch (cs42l51->audio_mode) {
399 case SND_SOC_DAIFMT_I2S:
400 intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
401 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
402 break;
403 case SND_SOC_DAIFMT_LEFT_J:
404 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
405 break;
406 case SND_SOC_DAIFMT_RIGHT_J:
407 switch (params_width(params)) {
408 case 16:
409 fmt = CS42L51_DAC_DIF_RJ16;
410 break;
411 case 18:
412 fmt = CS42L51_DAC_DIF_RJ18;
413 break;
414 case 20:
415 fmt = CS42L51_DAC_DIF_RJ20;
416 break;
417 case 24:
418 fmt = CS42L51_DAC_DIF_RJ24;
419 break;
420 default:
421 dev_err(codec->dev, "unknown format\n");
422 return -EINVAL;
423 }
424 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
425 break;
426 default:
427 dev_err(codec->dev, "unknown format\n");
428 return -EINVAL;
429 }
430
431 if (ratios[i].mclk)
432 power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
433
434 ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
435 if (ret < 0)
436 return ret;
437
438 ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
439 if (ret < 0)
440 return ret;
441
442 return 0;
443 }
444
445 static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
446 {
447 struct snd_soc_codec *codec = dai->codec;
448 int reg;
449 int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
450
451 reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
452
453 if (mute)
454 reg |= mask;
455 else
456 reg &= ~mask;
457
458 return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
459 }
460
461 static const struct snd_soc_dai_ops cs42l51_dai_ops = {
462 .hw_params = cs42l51_hw_params,
463 .set_sysclk = cs42l51_set_dai_sysclk,
464 .set_fmt = cs42l51_set_dai_fmt,
465 .digital_mute = cs42l51_dai_mute,
466 };
467
468 static struct snd_soc_dai_driver cs42l51_dai = {
469 .name = "cs42l51-hifi",
470 .playback = {
471 .stream_name = "Playback",
472 .channels_min = 1,
473 .channels_max = 2,
474 .rates = SNDRV_PCM_RATE_8000_96000,
475 .formats = CS42L51_FORMATS,
476 },
477 .capture = {
478 .stream_name = "Capture",
479 .channels_min = 1,
480 .channels_max = 2,
481 .rates = SNDRV_PCM_RATE_8000_96000,
482 .formats = CS42L51_FORMATS,
483 },
484 .ops = &cs42l51_dai_ops,
485 };
486
487 static int cs42l51_codec_probe(struct snd_soc_codec *codec)
488 {
489 int ret, reg;
490
491 /*
492 * DAC configuration
493 * - Use signal processor
494 * - auto mute
495 * - vol changes immediate
496 * - no de-emphasize
497 */
498 reg = CS42L51_DAC_CTL_DATA_SEL(1)
499 | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
500 ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
501 if (ret < 0)
502 return ret;
503
504 return 0;
505 }
506
507 static const struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
508 .probe = cs42l51_codec_probe,
509
510 .component_driver = {
511 .controls = cs42l51_snd_controls,
512 .num_controls = ARRAY_SIZE(cs42l51_snd_controls),
513 .dapm_widgets = cs42l51_dapm_widgets,
514 .num_dapm_widgets = ARRAY_SIZE(cs42l51_dapm_widgets),
515 .dapm_routes = cs42l51_routes,
516 .num_dapm_routes = ARRAY_SIZE(cs42l51_routes),
517 },
518 };
519
520 const struct regmap_config cs42l51_regmap = {
521 .max_register = CS42L51_CHARGE_FREQ,
522 .cache_type = REGCACHE_RBTREE,
523 };
524 EXPORT_SYMBOL_GPL(cs42l51_regmap);
525
526 int cs42l51_probe(struct device *dev, struct regmap *regmap)
527 {
528 struct cs42l51_private *cs42l51;
529 unsigned int val;
530 int ret;
531
532 if (IS_ERR(regmap))
533 return PTR_ERR(regmap);
534
535 cs42l51 = devm_kzalloc(dev, sizeof(struct cs42l51_private),
536 GFP_KERNEL);
537 if (!cs42l51)
538 return -ENOMEM;
539
540 dev_set_drvdata(dev, cs42l51);
541
542 /* Verify that we have a CS42L51 */
543 ret = regmap_read(regmap, CS42L51_CHIP_REV_ID, &val);
544 if (ret < 0) {
545 dev_err(dev, "failed to read I2C\n");
546 goto error;
547 }
548
549 if ((val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
550 (val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
551 dev_err(dev, "Invalid chip id: %x\n", val);
552 ret = -ENODEV;
553 goto error;
554 }
555 dev_info(dev, "Cirrus Logic CS42L51, Revision: %02X\n",
556 val & CS42L51_CHIP_REV_MASK);
557
558 ret = snd_soc_register_codec(dev,
559 &soc_codec_device_cs42l51, &cs42l51_dai, 1);
560 error:
561 return ret;
562 }
563 EXPORT_SYMBOL_GPL(cs42l51_probe);
564
565 const struct of_device_id cs42l51_of_match[] = {
566 { .compatible = "cirrus,cs42l51", },
567 { }
568 };
569 MODULE_DEVICE_TABLE(of, cs42l51_of_match);
570 EXPORT_SYMBOL_GPL(cs42l51_of_match);
571
572 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
573 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
574 MODULE_LICENSE("GPL");
Linux with added FPC-III support