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Btrfs: fix list transaction->pending_ordered corruption
[linux/fpc-iii.git] / sound / soc / codecs / cs42l51.c
blob669c38fc303468d51dd6bbd3dfa16e935c030e8c
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.integer.value[0] = 0;
64 break;
65 /* same value : (L+R)/2 and (R+L)/2 */
66 case 1:
67 case 2:
68 ucontrol->value.integer.value[0] = 1;
69 break;
70 case 3:
71 ucontrol->value.integer.value[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.integer.value[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 switch (event) {
157 case SND_SOC_DAPM_PRE_PMD:
158 snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
159 CS42L51_POWER_CTL1_PDN,
160 CS42L51_POWER_CTL1_PDN);
161 break;
162 default:
163 case SND_SOC_DAPM_POST_PMD:
164 snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
165 CS42L51_POWER_CTL1_PDN, 0);
166 break;
167 }
168
169 return 0;
170 }
171
172 static const char *cs42l51_dac_names[] = {"Direct PCM",
173 "DSP PCM", "ADC"};
174 static SOC_ENUM_SINGLE_DECL(cs42l51_dac_mux_enum,
175 CS42L51_DAC_CTL, 6, cs42l51_dac_names);
176 static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
177 SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
178
179 static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
180 "MIC Left", "MIC+preamp Left"};
181 static SOC_ENUM_SINGLE_DECL(cs42l51_adcl_mux_enum,
182 CS42L51_ADC_INPUT, 4, cs42l51_adcl_names);
183 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
184 SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
185
186 static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
187 "MIC Right", "MIC+preamp Right"};
188 static SOC_ENUM_SINGLE_DECL(cs42l51_adcr_mux_enum,
189 CS42L51_ADC_INPUT, 6, cs42l51_adcr_names);
190 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
191 SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
192
193 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
194 SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
195 SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
196 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
197 SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
198 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
199 SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
200 CS42L51_POWER_CTL1, 1, 1,
201 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
202 SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
203 CS42L51_POWER_CTL1, 2, 1,
204 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
205 SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
206 CS42L51_POWER_CTL1, 5, 1,
207 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
208 SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
209 CS42L51_POWER_CTL1, 6, 1,
210 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
211
212 /* analog/mic */
213 SND_SOC_DAPM_INPUT("AIN1L"),
214 SND_SOC_DAPM_INPUT("AIN1R"),
215 SND_SOC_DAPM_INPUT("AIN2L"),
216 SND_SOC_DAPM_INPUT("AIN2R"),
217 SND_SOC_DAPM_INPUT("MICL"),
218 SND_SOC_DAPM_INPUT("MICR"),
219
220 SND_SOC_DAPM_MIXER("Mic Preamp Left",
221 CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
222 SND_SOC_DAPM_MIXER("Mic Preamp Right",
223 CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
224
225 /* HP */
226 SND_SOC_DAPM_OUTPUT("HPL"),
227 SND_SOC_DAPM_OUTPUT("HPR"),
228
229 /* mux */
230 SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
231 &cs42l51_dac_mux_controls),
232 SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
233 &cs42l51_adcl_mux_controls),
234 SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
235 &cs42l51_adcr_mux_controls),
236 };
237
238 static const struct snd_soc_dapm_route cs42l51_routes[] = {
239 {"HPL", NULL, "Left DAC"},
240 {"HPR", NULL, "Right DAC"},
241
242 {"Left ADC", NULL, "Left PGA"},
243 {"Right ADC", NULL, "Right PGA"},
244
245 {"Mic Preamp Left", NULL, "MICL"},
246 {"Mic Preamp Right", NULL, "MICR"},
247
248 {"PGA-ADC Mux Left", "AIN1 Left", "AIN1L" },
249 {"PGA-ADC Mux Left", "AIN2 Left", "AIN2L" },
250 {"PGA-ADC Mux Left", "MIC Left", "MICL" },
251 {"PGA-ADC Mux Left", "MIC+preamp Left", "Mic Preamp Left" },
252 {"PGA-ADC Mux Right", "AIN1 Right", "AIN1R" },
253 {"PGA-ADC Mux Right", "AIN2 Right", "AIN2R" },
254 {"PGA-ADC Mux Right", "MIC Right", "MICR" },
255 {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
256
257 {"Left PGA", NULL, "PGA-ADC Mux Left"},
258 {"Right PGA", NULL, "PGA-ADC Mux Right"},
259 };
260
261 static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
262 unsigned int format)
263 {
264 struct snd_soc_codec *codec = codec_dai->codec;
265 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
266
267 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
268 case SND_SOC_DAIFMT_I2S:
269 case SND_SOC_DAIFMT_LEFT_J:
270 case SND_SOC_DAIFMT_RIGHT_J:
271 cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
272 break;
273 default:
274 dev_err(codec->dev, "invalid DAI format\n");
275 return -EINVAL;
276 }
277
278 switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
279 case SND_SOC_DAIFMT_CBM_CFM:
280 cs42l51->func = MODE_MASTER;
281 break;
282 case SND_SOC_DAIFMT_CBS_CFS:
283 cs42l51->func = MODE_SLAVE_AUTO;
284 break;
285 default:
286 dev_err(codec->dev, "Unknown master/slave configuration\n");
287 return -EINVAL;
288 }
289
290 return 0;
291 }
292
293 struct cs42l51_ratios {
294 unsigned int ratio;
295 unsigned char speed_mode;
296 unsigned char mclk;
297 };
298
299 static struct cs42l51_ratios slave_ratios[] = {
300 { 512, CS42L51_QSM_MODE, 0 }, { 768, CS42L51_QSM_MODE, 0 },
301 { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
302 { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
303 { 256, CS42L51_HSM_MODE, 0 }, { 384, CS42L51_HSM_MODE, 0 },
304 { 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
305 { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
306 { 128, CS42L51_SSM_MODE, 0 }, { 192, CS42L51_SSM_MODE, 0 },
307 { 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
308 { 512, CS42L51_SSM_MODE, 0 }, { 768, CS42L51_SSM_MODE, 0 },
309 { 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
310 { 256, CS42L51_DSM_MODE, 0 }, { 384, CS42L51_DSM_MODE, 0 },
311 };
312
313 static struct cs42l51_ratios slave_auto_ratios[] = {
314 { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
315 { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
316 { 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
317 { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
318 { 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
319 { 512, CS42L51_SSM_MODE, 1 }, { 768, CS42L51_SSM_MODE, 1 },
320 { 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
321 { 256, CS42L51_DSM_MODE, 1 }, { 384, CS42L51_DSM_MODE, 1 },
322 };
323
324 static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
325 int clk_id, unsigned int freq, int dir)
326 {
327 struct snd_soc_codec *codec = codec_dai->codec;
328 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
329
330 cs42l51->mclk = freq;
331 return 0;
332 }
333
334 static int cs42l51_hw_params(struct snd_pcm_substream *substream,
335 struct snd_pcm_hw_params *params,
336 struct snd_soc_dai *dai)
337 {
338 struct snd_soc_codec *codec = dai->codec;
339 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
340 int ret;
341 unsigned int i;
342 unsigned int rate;
343 unsigned int ratio;
344 struct cs42l51_ratios *ratios = NULL;
345 int nr_ratios = 0;
346 int intf_ctl, power_ctl, fmt;
347
348 switch (cs42l51->func) {
349 case MODE_MASTER:
350 return -EINVAL;
351 case MODE_SLAVE:
352 ratios = slave_ratios;
353 nr_ratios = ARRAY_SIZE(slave_ratios);
354 break;
355 case MODE_SLAVE_AUTO:
356 ratios = slave_auto_ratios;
357 nr_ratios = ARRAY_SIZE(slave_auto_ratios);
358 break;
359 }
360
361 /* Figure out which MCLK/LRCK ratio to use */
362 rate = params_rate(params); /* Sampling rate, in Hz */
363 ratio = cs42l51->mclk / rate; /* MCLK/LRCK ratio */
364 for (i = 0; i < nr_ratios; i++) {
365 if (ratios[i].ratio == ratio)
366 break;
367 }
368
369 if (i == nr_ratios) {
370 /* We did not find a matching ratio */
371 dev_err(codec->dev, "could not find matching ratio\n");
372 return -EINVAL;
373 }
374
375 intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
376 power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
377
378 intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
379 | CS42L51_INTF_CTL_DAC_FORMAT(7));
380 power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
381 | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
382
383 switch (cs42l51->func) {
384 case MODE_MASTER:
385 intf_ctl |= CS42L51_INTF_CTL_MASTER;
386 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
387 break;
388 case MODE_SLAVE:
389 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
390 break;
391 case MODE_SLAVE_AUTO:
392 power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
393 break;
394 }
395
396 switch (cs42l51->audio_mode) {
397 case SND_SOC_DAIFMT_I2S:
398 intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
399 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
400 break;
401 case SND_SOC_DAIFMT_LEFT_J:
402 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
403 break;
404 case SND_SOC_DAIFMT_RIGHT_J:
405 switch (params_width(params)) {
406 case 16:
407 fmt = CS42L51_DAC_DIF_RJ16;
408 break;
409 case 18:
410 fmt = CS42L51_DAC_DIF_RJ18;
411 break;
412 case 20:
413 fmt = CS42L51_DAC_DIF_RJ20;
414 break;
415 case 24:
416 fmt = CS42L51_DAC_DIF_RJ24;
417 break;
418 default:
419 dev_err(codec->dev, "unknown format\n");
420 return -EINVAL;
421 }
422 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
423 break;
424 default:
425 dev_err(codec->dev, "unknown format\n");
426 return -EINVAL;
427 }
428
429 if (ratios[i].mclk)
430 power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
431
432 ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
433 if (ret < 0)
434 return ret;
435
436 ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
437 if (ret < 0)
438 return ret;
439
440 return 0;
441 }
442
443 static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
444 {
445 struct snd_soc_codec *codec = dai->codec;
446 int reg;
447 int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
448
449 reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
450
451 if (mute)
452 reg |= mask;
453 else
454 reg &= ~mask;
455
456 return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
457 }
458
459 static const struct snd_soc_dai_ops cs42l51_dai_ops = {
460 .hw_params = cs42l51_hw_params,
461 .set_sysclk = cs42l51_set_dai_sysclk,
462 .set_fmt = cs42l51_set_dai_fmt,
463 .digital_mute = cs42l51_dai_mute,
464 };
465
466 static struct snd_soc_dai_driver cs42l51_dai = {
467 .name = "cs42l51-hifi",
468 .playback = {
469 .stream_name = "Playback",
470 .channels_min = 1,
471 .channels_max = 2,
472 .rates = SNDRV_PCM_RATE_8000_96000,
473 .formats = CS42L51_FORMATS,
474 },
475 .capture = {
476 .stream_name = "Capture",
477 .channels_min = 1,
478 .channels_max = 2,
479 .rates = SNDRV_PCM_RATE_8000_96000,
480 .formats = CS42L51_FORMATS,
481 },
482 .ops = &cs42l51_dai_ops,
483 };
484
485 static int cs42l51_codec_probe(struct snd_soc_codec *codec)
486 {
487 int ret, reg;
488
489 /*
490 * DAC configuration
491 * - Use signal processor
492 * - auto mute
493 * - vol changes immediate
494 * - no de-emphasize
495 */
496 reg = CS42L51_DAC_CTL_DATA_SEL(1)
497 | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
498 ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
499 if (ret < 0)
500 return ret;
501
502 return 0;
503 }
504
505 static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
506 .probe = cs42l51_codec_probe,
507
508 .controls = cs42l51_snd_controls,
509 .num_controls = ARRAY_SIZE(cs42l51_snd_controls),
510 .dapm_widgets = cs42l51_dapm_widgets,
511 .num_dapm_widgets = ARRAY_SIZE(cs42l51_dapm_widgets),
512 .dapm_routes = cs42l51_routes,
513 .num_dapm_routes = ARRAY_SIZE(cs42l51_routes),
514 };
515
516 const struct regmap_config cs42l51_regmap = {
517 .max_register = CS42L51_CHARGE_FREQ,
518 .cache_type = REGCACHE_RBTREE,
519 };
520 EXPORT_SYMBOL_GPL(cs42l51_regmap);
521
522 int cs42l51_probe(struct device *dev, struct regmap *regmap)
523 {
524 struct cs42l51_private *cs42l51;
525 unsigned int val;
526 int ret;
527
528 if (IS_ERR(regmap))
529 return PTR_ERR(regmap);
530
531 cs42l51 = devm_kzalloc(dev, sizeof(struct cs42l51_private),
532 GFP_KERNEL);
533 if (!cs42l51)
534 return -ENOMEM;
535
536 dev_set_drvdata(dev, cs42l51);
537
538 /* Verify that we have a CS42L51 */
539 ret = regmap_read(regmap, CS42L51_CHIP_REV_ID, &val);
540 if (ret < 0) {
541 dev_err(dev, "failed to read I2C\n");
542 goto error;
543 }
544
545 if ((val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
546 (val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
547 dev_err(dev, "Invalid chip id: %x\n", val);
548 ret = -ENODEV;
549 goto error;
550 }
551 dev_info(dev, "Cirrus Logic CS42L51, Revision: %02X\n",
552 val & CS42L51_CHIP_REV_MASK);
553
554 ret = snd_soc_register_codec(dev,
555 &soc_codec_device_cs42l51, &cs42l51_dai, 1);
556 error:
557 return ret;
558 }
559 EXPORT_SYMBOL_GPL(cs42l51_probe);
560
561 const struct of_device_id cs42l51_of_match[] = {
562 { .compatible = "cirrus,cs42l51", },
563 { }
564 };
565 MODULE_DEVICE_TABLE(of, cs42l51_of_match);
566 EXPORT_SYMBOL_GPL(cs42l51_of_match);
567
568 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
569 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
570 MODULE_LICENSE("GPL");
Linux with added FPC-III support