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24#include <linux/module.h>
25#include <linux/platform_device.h>
26#include <linux/slab.h>
27#include <sound/core.h>
28#include <sound/soc.h>
29#include <sound/tlv.h>
30#include <sound/initval.h>
31#include <sound/pcm_params.h>
32#include <sound/pcm.h>
33#include <linux/i2c.h>
34
35#include "cs42l51.h"
36
37enum master_slave_mode {
38 MODE_SLAVE,
39 MODE_SLAVE_AUTO,
40 MODE_MASTER,
41};
42
43struct cs42l51_private {
44 enum snd_soc_control_type control_type;
45 void *control_data;
46 unsigned int mclk;
47 unsigned int audio_mode;
48 enum master_slave_mode func;
49};
50
51#define CS42L51_FORMATS ( \
52 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
53 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
54 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
55 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
56
57static int cs42l51_fill_cache(struct snd_soc_codec *codec)
58{
59 u8 *cache = codec->reg_cache + 1;
60 struct i2c_client *i2c_client = codec->control_data;
61 s32 length;
62
63 length = i2c_smbus_read_i2c_block_data(i2c_client,
64 CS42L51_FIRSTREG | 0x80, CS42L51_NUMREGS, cache);
65 if (length != CS42L51_NUMREGS) {
66 dev_err(&i2c_client->dev,
67 "I2C read failure, addr=0x%x (ret=%d vs %d)\n",
68 i2c_client->addr, length, CS42L51_NUMREGS);
69 return -EIO;
70 }
71
72 return 0;
73}
74
75static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
76 struct snd_ctl_elem_value *ucontrol)
77{
78 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
79 unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
80
81 switch (value) {
82 default:
83 case 0:
84 ucontrol->value.integer.value[0] = 0;
85 break;
86
87 case 1:
88 case 2:
89 ucontrol->value.integer.value[0] = 1;
90 break;
91 case 3:
92 ucontrol->value.integer.value[0] = 2;
93 break;
94 }
95
96 return 0;
97}
98
99#define CHAN_MIX_NORMAL 0x00
100#define CHAN_MIX_BOTH 0x55
101#define CHAN_MIX_SWAP 0xFF
102
103static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
104 struct snd_ctl_elem_value *ucontrol)
105{
106 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
107 unsigned char val;
108
109 switch (ucontrol->value.integer.value[0]) {
110 default:
111 case 0:
112 val = CHAN_MIX_NORMAL;
113 break;
114 case 1:
115 val = CHAN_MIX_BOTH;
116 break;
117 case 2:
118 val = CHAN_MIX_SWAP;
119 break;
120 }
121
122 snd_soc_write(codec, CS42L51_PCM_MIXER, val);
123
124 return 1;
125}
126
127static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
128static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
129
130
131static const DECLARE_TLV_DB_SCALE(aout_tlv, -11550, 50, 0);
132
133static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
134static const char *chan_mix[] = {
135 "L R",
136 "L+R",
137 "R L",
138};
139
140static const struct soc_enum cs42l51_chan_mix =
141 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);
142
143static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
144 SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
145 CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
146 7, 0xffffff99, 0x18, adc_pcm_tlv),
147 SOC_DOUBLE_R("PCM Playback Switch",
148 CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
149 SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
150 CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
151 8, 0xffffff19, 0x18, aout_tlv),
152 SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
153 CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
154 7, 0xffffff99, 0x18, adc_pcm_tlv),
155 SOC_DOUBLE_R("ADC Mixer Switch",
156 CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
157 SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
158 SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
159 SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
160 SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
161 SOC_DOUBLE_TLV("Mic Boost Volume",
162 CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
163 SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
164 SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
165 SOC_ENUM_EXT("PCM channel mixer",
166 cs42l51_chan_mix,
167 cs42l51_get_chan_mix, cs42l51_set_chan_mix),
168};
169
170
171
172
173
174
175
176static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
177 struct snd_kcontrol *kcontrol, int event)
178{
179 unsigned long value;
180
181 value = snd_soc_read(w->codec, CS42L51_POWER_CTL1);
182 value &= ~CS42L51_POWER_CTL1_PDN;
183
184 switch (event) {
185 case SND_SOC_DAPM_PRE_PMD:
186 value |= CS42L51_POWER_CTL1_PDN;
187 break;
188 default:
189 case SND_SOC_DAPM_POST_PMD:
190 break;
191 }
192 snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
193 CS42L51_POWER_CTL1_PDN, value);
194
195 return 0;
196}
197
198static const char *cs42l51_dac_names[] = {"Direct PCM",
199 "DSP PCM", "ADC"};
200static const struct soc_enum cs42l51_dac_mux_enum =
201 SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
202static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
203 SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
204
205static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
206 "MIC Left", "MIC+preamp Left"};
207static const struct soc_enum cs42l51_adcl_mux_enum =
208 SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
209static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
210 SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
211
212static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
213 "MIC Right", "MIC+preamp Right"};
214static const struct soc_enum cs42l51_adcr_mux_enum =
215 SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
216static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
217 SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
218
219static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
220 SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
221 SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
222 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
223 SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
224 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
225 SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
226 CS42L51_POWER_CTL1, 1, 1,
227 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
228 SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
229 CS42L51_POWER_CTL1, 2, 1,
230 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
231 SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
232 CS42L51_POWER_CTL1, 5, 1,
233 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
234 SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
235 CS42L51_POWER_CTL1, 6, 1,
236 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
237
238
239 SND_SOC_DAPM_INPUT("AIN1L"),
240 SND_SOC_DAPM_INPUT("AIN1R"),
241 SND_SOC_DAPM_INPUT("AIN2L"),
242 SND_SOC_DAPM_INPUT("AIN2R"),
243 SND_SOC_DAPM_INPUT("MICL"),
244 SND_SOC_DAPM_INPUT("MICR"),
245
246 SND_SOC_DAPM_MIXER("Mic Preamp Left",
247 CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
248 SND_SOC_DAPM_MIXER("Mic Preamp Right",
249 CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
250
251
252 SND_SOC_DAPM_OUTPUT("HPL"),
253 SND_SOC_DAPM_OUTPUT("HPR"),
254
255
256 SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
257 &cs42l51_dac_mux_controls),
258 SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
259 &cs42l51_adcl_mux_controls),
260 SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
261 &cs42l51_adcr_mux_controls),
262};
263
264static const struct snd_soc_dapm_route cs42l51_routes[] = {
265 {"HPL", NULL, "Left DAC"},
266 {"HPR", NULL, "Right DAC"},
267
268 {"Left ADC", NULL, "Left PGA"},
269 {"Right ADC", NULL, "Right PGA"},
270
271 {"Mic Preamp Left", NULL, "MICL"},
272 {"Mic Preamp Right", NULL, "MICR"},
273
274 {"PGA-ADC Mux Left", "AIN1 Left", "AIN1L" },
275 {"PGA-ADC Mux Left", "AIN2 Left", "AIN2L" },
276 {"PGA-ADC Mux Left", "MIC Left", "MICL" },
277 {"PGA-ADC Mux Left", "MIC+preamp Left", "Mic Preamp Left" },
278 {"PGA-ADC Mux Right", "AIN1 Right", "AIN1R" },
279 {"PGA-ADC Mux Right", "AIN2 Right", "AIN2R" },
280 {"PGA-ADC Mux Right", "MIC Right", "MICR" },
281 {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
282
283 {"Left PGA", NULL, "PGA-ADC Mux Left"},
284 {"Right PGA", NULL, "PGA-ADC Mux Right"},
285};
286
287static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
288 unsigned int format)
289{
290 struct snd_soc_codec *codec = codec_dai->codec;
291 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
292 int ret = 0;
293
294 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
295 case SND_SOC_DAIFMT_I2S:
296 case SND_SOC_DAIFMT_LEFT_J:
297 case SND_SOC_DAIFMT_RIGHT_J:
298 cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
299 break;
300 default:
301 dev_err(codec->dev, "invalid DAI format\n");
302 ret = -EINVAL;
303 }
304
305 switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
306 case SND_SOC_DAIFMT_CBM_CFM:
307 cs42l51->func = MODE_MASTER;
308 break;
309 case SND_SOC_DAIFMT_CBS_CFS:
310 cs42l51->func = MODE_SLAVE_AUTO;
311 break;
312 default:
313 ret = -EINVAL;
314 break;
315 }
316
317 return ret;
318}
319
320struct cs42l51_ratios {
321 unsigned int ratio;
322 unsigned char speed_mode;
323 unsigned char mclk;
324};
325
326static struct cs42l51_ratios slave_ratios[] = {
327 { 512, CS42L51_QSM_MODE, 0 }, { 768, CS42L51_QSM_MODE, 0 },
328 { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
329 { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
330 { 256, CS42L51_HSM_MODE, 0 }, { 384, CS42L51_HSM_MODE, 0 },
331 { 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
332 { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
333 { 128, CS42L51_SSM_MODE, 0 }, { 192, CS42L51_SSM_MODE, 0 },
334 { 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
335 { 512, CS42L51_SSM_MODE, 0 }, { 768, CS42L51_SSM_MODE, 0 },
336 { 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
337 { 256, CS42L51_DSM_MODE, 0 }, { 384, CS42L51_DSM_MODE, 0 },
338};
339
340static struct cs42l51_ratios slave_auto_ratios[] = {
341 { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
342 { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
343 { 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
344 { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
345 { 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
346 { 512, CS42L51_SSM_MODE, 1 }, { 768, CS42L51_SSM_MODE, 1 },
347 { 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
348 { 256, CS42L51_DSM_MODE, 1 }, { 384, CS42L51_DSM_MODE, 1 },
349};
350
351static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
352 int clk_id, unsigned int freq, int dir)
353{
354 struct snd_soc_codec *codec = codec_dai->codec;
355 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
356
357 cs42l51->mclk = freq;
358 return 0;
359}
360
361static int cs42l51_hw_params(struct snd_pcm_substream *substream,
362 struct snd_pcm_hw_params *params,
363 struct snd_soc_dai *dai)
364{
365 struct snd_soc_pcm_runtime *rtd = substream->private_data;
366 struct snd_soc_codec *codec = rtd->codec;
367 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
368 int ret;
369 unsigned int i;
370 unsigned int rate;
371 unsigned int ratio;
372 struct cs42l51_ratios *ratios = NULL;
373 int nr_ratios = 0;
374 int intf_ctl, power_ctl, fmt;
375
376 switch (cs42l51->func) {
377 case MODE_MASTER:
378 return -EINVAL;
379 case MODE_SLAVE:
380 ratios = slave_ratios;
381 nr_ratios = ARRAY_SIZE(slave_ratios);
382 break;
383 case MODE_SLAVE_AUTO:
384 ratios = slave_auto_ratios;
385 nr_ratios = ARRAY_SIZE(slave_auto_ratios);
386 break;
387 }
388
389
390 rate = params_rate(params);
391 ratio = cs42l51->mclk / rate;
392 for (i = 0; i < nr_ratios; i++) {
393 if (ratios[i].ratio == ratio)
394 break;
395 }
396
397 if (i == nr_ratios) {
398
399 dev_err(codec->dev, "could not find matching ratio\n");
400 return -EINVAL;
401 }
402
403 intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
404 power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
405
406 intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
407 | CS42L51_INTF_CTL_DAC_FORMAT(7));
408 power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
409 | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
410
411 switch (cs42l51->func) {
412 case MODE_MASTER:
413 intf_ctl |= CS42L51_INTF_CTL_MASTER;
414 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
415 break;
416 case MODE_SLAVE:
417 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
418 break;
419 case MODE_SLAVE_AUTO:
420 power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
421 break;
422 }
423
424 switch (cs42l51->audio_mode) {
425 case SND_SOC_DAIFMT_I2S:
426 intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
427 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
428 break;
429 case SND_SOC_DAIFMT_LEFT_J:
430 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
431 break;
432 case SND_SOC_DAIFMT_RIGHT_J:
433 switch (params_format(params)) {
434 case SNDRV_PCM_FORMAT_S16_LE:
435 case SNDRV_PCM_FORMAT_S16_BE:
436 fmt = CS42L51_DAC_DIF_RJ16;
437 break;
438 case SNDRV_PCM_FORMAT_S18_3LE:
439 case SNDRV_PCM_FORMAT_S18_3BE:
440 fmt = CS42L51_DAC_DIF_RJ18;
441 break;
442 case SNDRV_PCM_FORMAT_S20_3LE:
443 case SNDRV_PCM_FORMAT_S20_3BE:
444 fmt = CS42L51_DAC_DIF_RJ20;
445 break;
446 case SNDRV_PCM_FORMAT_S24_LE:
447 case SNDRV_PCM_FORMAT_S24_BE:
448 fmt = CS42L51_DAC_DIF_RJ24;
449 break;
450 default:
451 dev_err(codec->dev, "unknown format\n");
452 return -EINVAL;
453 }
454 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
455 break;
456 default:
457 dev_err(codec->dev, "unknown format\n");
458 return -EINVAL;
459 }
460
461 if (ratios[i].mclk)
462 power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
463
464 ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
465 if (ret < 0)
466 return ret;
467
468 ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
469 if (ret < 0)
470 return ret;
471
472 return 0;
473}
474
475static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
476{
477 struct snd_soc_codec *codec = dai->codec;
478 int reg;
479 int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
480
481 reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
482
483 if (mute)
484 reg |= mask;
485 else
486 reg &= ~mask;
487
488 return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
489}
490
491static struct snd_soc_dai_ops cs42l51_dai_ops = {
492 .hw_params = cs42l51_hw_params,
493 .set_sysclk = cs42l51_set_dai_sysclk,
494 .set_fmt = cs42l51_set_dai_fmt,
495 .digital_mute = cs42l51_dai_mute,
496};
497
498static struct snd_soc_dai_driver cs42l51_dai = {
499 .name = "cs42l51-hifi",
500 .playback = {
501 .stream_name = "Playback",
502 .channels_min = 1,
503 .channels_max = 2,
504 .rates = SNDRV_PCM_RATE_8000_96000,
505 .formats = CS42L51_FORMATS,
506 },
507 .capture = {
508 .stream_name = "Capture",
509 .channels_min = 1,
510 .channels_max = 2,
511 .rates = SNDRV_PCM_RATE_8000_96000,
512 .formats = CS42L51_FORMATS,
513 },
514 .ops = &cs42l51_dai_ops,
515};
516
517static int cs42l51_probe(struct snd_soc_codec *codec)
518{
519 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
520 struct snd_soc_dapm_context *dapm = &codec->dapm;
521 int ret, reg;
522
523 codec->control_data = cs42l51->control_data;
524
525 ret = cs42l51_fill_cache(codec);
526 if (ret < 0) {
527 dev_err(codec->dev, "failed to fill register cache\n");
528 return ret;
529 }
530
531 ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
532 if (ret < 0) {
533 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
534 return ret;
535 }
536
537
538
539
540
541
542
543
544 reg = CS42L51_DAC_CTL_DATA_SEL(1)
545 | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
546 ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
547 if (ret < 0)
548 return ret;
549
550 snd_soc_add_controls(codec, cs42l51_snd_controls,
551 ARRAY_SIZE(cs42l51_snd_controls));
552 snd_soc_dapm_new_controls(dapm, cs42l51_dapm_widgets,
553 ARRAY_SIZE(cs42l51_dapm_widgets));
554 snd_soc_dapm_add_routes(dapm, cs42l51_routes,
555 ARRAY_SIZE(cs42l51_routes));
556
557 return 0;
558}
559
560static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
561 .probe = cs42l51_probe,
562 .reg_cache_size = CS42L51_NUMREGS,
563 .reg_word_size = sizeof(u8),
564};
565
566static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
567 const struct i2c_device_id *id)
568{
569 struct cs42l51_private *cs42l51;
570 int ret;
571
572
573 ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
574 if (ret < 0) {
575 dev_err(&i2c_client->dev, "failed to read I2C\n");
576 goto error;
577 }
578
579 if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
580 (ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
581 dev_err(&i2c_client->dev, "Invalid chip id\n");
582 ret = -ENODEV;
583 goto error;
584 }
585
586 dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
587 ret & 7);
588
589 cs42l51 = kzalloc(sizeof(struct cs42l51_private), GFP_KERNEL);
590 if (!cs42l51) {
591 dev_err(&i2c_client->dev, "could not allocate codec\n");
592 return -ENOMEM;
593 }
594
595 i2c_set_clientdata(i2c_client, cs42l51);
596 cs42l51->control_data = i2c_client;
597 cs42l51->control_type = SND_SOC_I2C;
598
599 ret = snd_soc_register_codec(&i2c_client->dev,
600 &soc_codec_device_cs42l51, &cs42l51_dai, 1);
601 if (ret < 0)
602 kfree(cs42l51);
603error:
604 return ret;
605}
606
607static int cs42l51_i2c_remove(struct i2c_client *client)
608{
609 struct cs42l51_private *cs42l51 = i2c_get_clientdata(client);
610
611 snd_soc_unregister_codec(&client->dev);
612 kfree(cs42l51);
613 return 0;
614}
615
616static const struct i2c_device_id cs42l51_id[] = {
617 {"cs42l51", 0},
618 {}
619};
620MODULE_DEVICE_TABLE(i2c, cs42l51_id);
621
622static struct i2c_driver cs42l51_i2c_driver = {
623 .driver = {
624 .name = "cs42l51-codec",
625 .owner = THIS_MODULE,
626 },
627 .id_table = cs42l51_id,
628 .probe = cs42l51_i2c_probe,
629 .remove = cs42l51_i2c_remove,
630};
631
632static int __init cs42l51_init(void)
633{
634 int ret;
635
636 ret = i2c_add_driver(&cs42l51_i2c_driver);
637 if (ret != 0) {
638 printk(KERN_ERR "%s: can't add i2c driver\n", __func__);
639 return ret;
640 }
641 return 0;
642}
643module_init(cs42l51_init);
644
645static void __exit cs42l51_exit(void)
646{
647 i2c_del_driver(&cs42l51_i2c_driver);
648}
649module_exit(cs42l51_exit);
650
651MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
652MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
653MODULE_LICENSE("GPL");
654
