xref: /linux/sound/soc/codecs/cs42l51.c (revision f2ee442115c9b6219083c019939a9cc0c9abb2f8)
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/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 
37 enum master_slave_mode {
38 	MODE_SLAVE,
39 	MODE_SLAVE_AUTO,
40 	MODE_MASTER,
41 };
42 
43 struct cs42l51_private {
44 	enum snd_soc_control_type control_type;
45 	unsigned int mclk;
46 	unsigned int audio_mode;	/* The mode (I2S or left-justified) */
47 	enum master_slave_mode func;
48 };
49 
50 #define CS42L51_FORMATS ( \
51 		SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
52 		SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
53 		SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
54 		SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE)
55 
56 static int cs42l51_fill_cache(struct snd_soc_codec *codec)
57 {
58 	u8 *cache = codec->reg_cache + 1;
59 	struct i2c_client *i2c_client = to_i2c_client(codec->dev);
60 	s32 length;
61 
62 	length = i2c_smbus_read_i2c_block_data(i2c_client,
63 			CS42L51_FIRSTREG | 0x80, CS42L51_NUMREGS, cache);
64 	if (length != CS42L51_NUMREGS) {
65 		dev_err(&i2c_client->dev,
66 				"I2C read failure, addr=0x%x (ret=%d vs %d)\n",
67 				i2c_client->addr, length, CS42L51_NUMREGS);
68 		return -EIO;
69 	}
70 
71 	return 0;
72 }
73 
74 static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
75 			struct snd_ctl_elem_value *ucontrol)
76 {
77 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
78 	unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
79 
80 	switch (value) {
81 	default:
82 	case 0:
83 		ucontrol->value.integer.value[0] = 0;
84 		break;
85 	/* same value : (L+R)/2 and (R+L)/2 */
86 	case 1:
87 	case 2:
88 		ucontrol->value.integer.value[0] = 1;
89 		break;
90 	case 3:
91 		ucontrol->value.integer.value[0] = 2;
92 		break;
93 	}
94 
95 	return 0;
96 }
97 
98 #define CHAN_MIX_NORMAL	0x00
99 #define CHAN_MIX_BOTH	0x55
100 #define CHAN_MIX_SWAP	0xFF
101 
102 static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
103 			struct snd_ctl_elem_value *ucontrol)
104 {
105 	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
106 	unsigned char val;
107 
108 	switch (ucontrol->value.integer.value[0]) {
109 	default:
110 	case 0:
111 		val = CHAN_MIX_NORMAL;
112 		break;
113 	case 1:
114 		val = CHAN_MIX_BOTH;
115 		break;
116 	case 2:
117 		val = CHAN_MIX_SWAP;
118 		break;
119 	}
120 
121 	snd_soc_write(codec, CS42L51_PCM_MIXER, val);
122 
123 	return 1;
124 }
125 
126 static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
127 static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
128 /* This is a lie. after -102 db, it stays at -102 */
129 /* maybe a range would be better */
130 static const DECLARE_TLV_DB_SCALE(aout_tlv, -11550, 50, 0);
131 
132 static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
133 static const char *chan_mix[] = {
134 	"L R",
135 	"L+R",
136 	"R L",
137 };
138 
139 static const struct soc_enum cs42l51_chan_mix =
140 	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);
141 
142 static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
143 	SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
144 			CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
145 			7, 0xffffff99, 0x18, adc_pcm_tlv),
146 	SOC_DOUBLE_R("PCM Playback Switch",
147 			CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
148 	SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
149 			CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
150 			8, 0xffffff19, 0x18, aout_tlv),
151 	SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
152 			CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
153 			7, 0xffffff99, 0x18, adc_pcm_tlv),
154 	SOC_DOUBLE_R("ADC Mixer Switch",
155 			CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
156 	SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
157 	SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
158 	SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
159 	SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
160 	SOC_DOUBLE_TLV("Mic Boost Volume",
161 			CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
162 	SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
163 	SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
164 	SOC_ENUM_EXT("PCM channel mixer",
165 			cs42l51_chan_mix,
166 			cs42l51_get_chan_mix, cs42l51_set_chan_mix),
167 };
168 
169 /*
170  * to power down, one must:
171  * 1.) Enable the PDN bit
172  * 2.) enable power-down for the select channels
173  * 3.) disable the PDN bit.
174  */
175 static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
176 		struct snd_kcontrol *kcontrol, int event)
177 {
178 	unsigned long value;
179 
180 	value = snd_soc_read(w->codec, CS42L51_POWER_CTL1);
181 	value &= ~CS42L51_POWER_CTL1_PDN;
182 
183 	switch (event) {
184 	case SND_SOC_DAPM_PRE_PMD:
185 		value |= CS42L51_POWER_CTL1_PDN;
186 		break;
187 	default:
188 	case SND_SOC_DAPM_POST_PMD:
189 		break;
190 	}
191 	snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
192 		CS42L51_POWER_CTL1_PDN, value);
193 
194 	return 0;
195 }
196 
197 static const char *cs42l51_dac_names[] = {"Direct PCM",
198 	"DSP PCM", "ADC"};
199 static const struct soc_enum cs42l51_dac_mux_enum =
200 	SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
201 static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
202 	SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
203 
204 static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
205 	"MIC Left", "MIC+preamp Left"};
206 static const struct soc_enum cs42l51_adcl_mux_enum =
207 	SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
208 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
209 	SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
210 
211 static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
212 	"MIC Right", "MIC+preamp Right"};
213 static const struct soc_enum cs42l51_adcr_mux_enum =
214 	SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
215 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
216 	SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
217 
218 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
219 	SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
220 	SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
221 		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
222 	SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
223 		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
224 	SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
225 		CS42L51_POWER_CTL1, 1, 1,
226 		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
227 	SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
228 		CS42L51_POWER_CTL1, 2, 1,
229 		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
230 	SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
231 		CS42L51_POWER_CTL1, 5, 1,
232 		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
233 	SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
234 		CS42L51_POWER_CTL1, 6, 1,
235 		cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
236 
237 	/* analog/mic */
238 	SND_SOC_DAPM_INPUT("AIN1L"),
239 	SND_SOC_DAPM_INPUT("AIN1R"),
240 	SND_SOC_DAPM_INPUT("AIN2L"),
241 	SND_SOC_DAPM_INPUT("AIN2R"),
242 	SND_SOC_DAPM_INPUT("MICL"),
243 	SND_SOC_DAPM_INPUT("MICR"),
244 
245 	SND_SOC_DAPM_MIXER("Mic Preamp Left",
246 		CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
247 	SND_SOC_DAPM_MIXER("Mic Preamp Right",
248 		CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
249 
250 	/* HP */
251 	SND_SOC_DAPM_OUTPUT("HPL"),
252 	SND_SOC_DAPM_OUTPUT("HPR"),
253 
254 	/* mux */
255 	SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
256 		&cs42l51_dac_mux_controls),
257 	SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
258 		&cs42l51_adcl_mux_controls),
259 	SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
260 		&cs42l51_adcr_mux_controls),
261 };
262 
263 static const struct snd_soc_dapm_route cs42l51_routes[] = {
264 	{"HPL", NULL, "Left DAC"},
265 	{"HPR", NULL, "Right DAC"},
266 
267 	{"Left ADC", NULL, "Left PGA"},
268 	{"Right ADC", NULL, "Right PGA"},
269 
270 	{"Mic Preamp Left",  NULL,  "MICL"},
271 	{"Mic Preamp Right", NULL,  "MICR"},
272 
273 	{"PGA-ADC Mux Left",  "AIN1 Left",        "AIN1L" },
274 	{"PGA-ADC Mux Left",  "AIN2 Left",        "AIN2L" },
275 	{"PGA-ADC Mux Left",  "MIC Left",         "MICL"  },
276 	{"PGA-ADC Mux Left",  "MIC+preamp Left",  "Mic Preamp Left" },
277 	{"PGA-ADC Mux Right", "AIN1 Right",       "AIN1R" },
278 	{"PGA-ADC Mux Right", "AIN2 Right",       "AIN2R" },
279 	{"PGA-ADC Mux Right", "MIC Right",        "MICR" },
280 	{"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
281 
282 	{"Left PGA", NULL, "PGA-ADC Mux Left"},
283 	{"Right PGA", NULL, "PGA-ADC Mux Right"},
284 };
285 
286 static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
287 		unsigned int format)
288 {
289 	struct snd_soc_codec *codec = codec_dai->codec;
290 	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
291 
292 	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
293 	case SND_SOC_DAIFMT_I2S:
294 	case SND_SOC_DAIFMT_LEFT_J:
295 	case SND_SOC_DAIFMT_RIGHT_J:
296 		cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
297 		break;
298 	default:
299 		dev_err(codec->dev, "invalid DAI format\n");
300 		return -EINVAL;
301 	}
302 
303 	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
304 	case SND_SOC_DAIFMT_CBM_CFM:
305 		cs42l51->func = MODE_MASTER;
306 		break;
307 	case SND_SOC_DAIFMT_CBS_CFS:
308 		cs42l51->func = MODE_SLAVE_AUTO;
309 		break;
310 	default:
311 		dev_err(codec->dev, "Unknown master/slave configuration\n");
312 		return -EINVAL;
313 	}
314 
315 	return 0;
316 }
317 
318 struct cs42l51_ratios {
319 	unsigned int ratio;
320 	unsigned char speed_mode;
321 	unsigned char mclk;
322 };
323 
324 static struct cs42l51_ratios slave_ratios[] = {
325 	{  512, CS42L51_QSM_MODE, 0 }, {  768, CS42L51_QSM_MODE, 0 },
326 	{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
327 	{ 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
328 	{  256, CS42L51_HSM_MODE, 0 }, {  384, CS42L51_HSM_MODE, 0 },
329 	{  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
330 	{ 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
331 	{  128, CS42L51_SSM_MODE, 0 }, {  192, CS42L51_SSM_MODE, 0 },
332 	{  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
333 	{  512, CS42L51_SSM_MODE, 0 }, {  768, CS42L51_SSM_MODE, 0 },
334 	{  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
335 	{  256, CS42L51_DSM_MODE, 0 }, {  384, CS42L51_DSM_MODE, 0 },
336 };
337 
338 static struct cs42l51_ratios slave_auto_ratios[] = {
339 	{ 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
340 	{ 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
341 	{  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
342 	{ 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
343 	{  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
344 	{  512, CS42L51_SSM_MODE, 1 }, {  768, CS42L51_SSM_MODE, 1 },
345 	{  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
346 	{  256, CS42L51_DSM_MODE, 1 }, {  384, CS42L51_DSM_MODE, 1 },
347 };
348 
349 static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
350 		int clk_id, unsigned int freq, int dir)
351 {
352 	struct snd_soc_codec *codec = codec_dai->codec;
353 	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
354 
355 	cs42l51->mclk = freq;
356 	return 0;
357 }
358 
359 static int cs42l51_hw_params(struct snd_pcm_substream *substream,
360 		struct snd_pcm_hw_params *params,
361 		struct snd_soc_dai *dai)
362 {
363 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
364 	struct snd_soc_codec *codec = rtd->codec;
365 	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
366 	int ret;
367 	unsigned int i;
368 	unsigned int rate;
369 	unsigned int ratio;
370 	struct cs42l51_ratios *ratios = NULL;
371 	int nr_ratios = 0;
372 	int intf_ctl, power_ctl, fmt;
373 
374 	switch (cs42l51->func) {
375 	case MODE_MASTER:
376 		return -EINVAL;
377 	case MODE_SLAVE:
378 		ratios = slave_ratios;
379 		nr_ratios = ARRAY_SIZE(slave_ratios);
380 		break;
381 	case MODE_SLAVE_AUTO:
382 		ratios = slave_auto_ratios;
383 		nr_ratios = ARRAY_SIZE(slave_auto_ratios);
384 		break;
385 	}
386 
387 	/* Figure out which MCLK/LRCK ratio to use */
388 	rate = params_rate(params);     /* Sampling rate, in Hz */
389 	ratio = cs42l51->mclk / rate;    /* MCLK/LRCK ratio */
390 	for (i = 0; i < nr_ratios; i++) {
391 		if (ratios[i].ratio == ratio)
392 			break;
393 	}
394 
395 	if (i == nr_ratios) {
396 		/* We did not find a matching ratio */
397 		dev_err(codec->dev, "could not find matching ratio\n");
398 		return -EINVAL;
399 	}
400 
401 	intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
402 	power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
403 
404 	intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
405 			| CS42L51_INTF_CTL_DAC_FORMAT(7));
406 	power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
407 			| CS42L51_MIC_POWER_CTL_MCLK_DIV2);
408 
409 	switch (cs42l51->func) {
410 	case MODE_MASTER:
411 		intf_ctl |= CS42L51_INTF_CTL_MASTER;
412 		power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
413 		break;
414 	case MODE_SLAVE:
415 		power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
416 		break;
417 	case MODE_SLAVE_AUTO:
418 		power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
419 		break;
420 	}
421 
422 	switch (cs42l51->audio_mode) {
423 	case SND_SOC_DAIFMT_I2S:
424 		intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
425 		intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
426 		break;
427 	case SND_SOC_DAIFMT_LEFT_J:
428 		intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
429 		break;
430 	case SND_SOC_DAIFMT_RIGHT_J:
431 		switch (params_format(params)) {
432 		case SNDRV_PCM_FORMAT_S16_LE:
433 		case SNDRV_PCM_FORMAT_S16_BE:
434 			fmt = CS42L51_DAC_DIF_RJ16;
435 			break;
436 		case SNDRV_PCM_FORMAT_S18_3LE:
437 		case SNDRV_PCM_FORMAT_S18_3BE:
438 			fmt = CS42L51_DAC_DIF_RJ18;
439 			break;
440 		case SNDRV_PCM_FORMAT_S20_3LE:
441 		case SNDRV_PCM_FORMAT_S20_3BE:
442 			fmt = CS42L51_DAC_DIF_RJ20;
443 			break;
444 		case SNDRV_PCM_FORMAT_S24_LE:
445 		case SNDRV_PCM_FORMAT_S24_BE:
446 			fmt = CS42L51_DAC_DIF_RJ24;
447 			break;
448 		default:
449 			dev_err(codec->dev, "unknown format\n");
450 			return -EINVAL;
451 		}
452 		intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
453 		break;
454 	default:
455 		dev_err(codec->dev, "unknown format\n");
456 		return -EINVAL;
457 	}
458 
459 	if (ratios[i].mclk)
460 		power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
461 
462 	ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
463 	if (ret < 0)
464 		return ret;
465 
466 	ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
467 	if (ret < 0)
468 		return ret;
469 
470 	return 0;
471 }
472 
473 static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
474 {
475 	struct snd_soc_codec *codec = dai->codec;
476 	int reg;
477 	int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
478 
479 	reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
480 
481 	if (mute)
482 		reg |= mask;
483 	else
484 		reg &= ~mask;
485 
486 	return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
487 }
488 
489 static struct snd_soc_dai_ops cs42l51_dai_ops = {
490 	.hw_params      = cs42l51_hw_params,
491 	.set_sysclk     = cs42l51_set_dai_sysclk,
492 	.set_fmt        = cs42l51_set_dai_fmt,
493 	.digital_mute   = cs42l51_dai_mute,
494 };
495 
496 static struct snd_soc_dai_driver cs42l51_dai = {
497 	.name = "cs42l51-hifi",
498 	.playback = {
499 		.stream_name = "Playback",
500 		.channels_min = 1,
501 		.channels_max = 2,
502 		.rates = SNDRV_PCM_RATE_8000_96000,
503 		.formats = CS42L51_FORMATS,
504 	},
505 	.capture = {
506 		.stream_name = "Capture",
507 		.channels_min = 1,
508 		.channels_max = 2,
509 		.rates = SNDRV_PCM_RATE_8000_96000,
510 		.formats = CS42L51_FORMATS,
511 	},
512 	.ops = &cs42l51_dai_ops,
513 };
514 
515 static int cs42l51_probe(struct snd_soc_codec *codec)
516 {
517 	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
518 	struct snd_soc_dapm_context *dapm = &codec->dapm;
519 	int ret, reg;
520 
521 	ret = cs42l51_fill_cache(codec);
522 	if (ret < 0) {
523 		dev_err(codec->dev, "failed to fill register cache\n");
524 		return ret;
525 	}
526 
527 	ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
528 	if (ret < 0) {
529 		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
530 		return ret;
531 	}
532 
533 	/*
534 	 * DAC configuration
535 	 * - Use signal processor
536 	 * - auto mute
537 	 * - vol changes immediate
538 	 * - no de-emphasize
539 	 */
540 	reg = CS42L51_DAC_CTL_DATA_SEL(1)
541 		| CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
542 	ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
543 	if (ret < 0)
544 		return ret;
545 
546 	snd_soc_add_controls(codec, cs42l51_snd_controls,
547 		ARRAY_SIZE(cs42l51_snd_controls));
548 	snd_soc_dapm_new_controls(dapm, cs42l51_dapm_widgets,
549 		ARRAY_SIZE(cs42l51_dapm_widgets));
550 	snd_soc_dapm_add_routes(dapm, cs42l51_routes,
551 		ARRAY_SIZE(cs42l51_routes));
552 
553 	return 0;
554 }
555 
556 static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
557 	.probe =	cs42l51_probe,
558 	.reg_cache_size = CS42L51_NUMREGS,
559 	.reg_word_size = sizeof(u8),
560 };
561 
562 static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
563 	const struct i2c_device_id *id)
564 {
565 	struct cs42l51_private *cs42l51;
566 	int ret;
567 
568 	/* Verify that we have a CS42L51 */
569 	ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
570 	if (ret < 0) {
571 		dev_err(&i2c_client->dev, "failed to read I2C\n");
572 		goto error;
573 	}
574 
575 	if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
576 	    (ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
577 		dev_err(&i2c_client->dev, "Invalid chip id\n");
578 		ret = -ENODEV;
579 		goto error;
580 	}
581 
582 	dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
583 				ret & 7);
584 
585 	cs42l51 = kzalloc(sizeof(struct cs42l51_private), GFP_KERNEL);
586 	if (!cs42l51) {
587 		dev_err(&i2c_client->dev, "could not allocate codec\n");
588 		return -ENOMEM;
589 	}
590 
591 	i2c_set_clientdata(i2c_client, cs42l51);
592 	cs42l51->control_type = SND_SOC_I2C;
593 
594 	ret =  snd_soc_register_codec(&i2c_client->dev,
595 			&soc_codec_device_cs42l51, &cs42l51_dai, 1);
596 	if (ret < 0)
597 		kfree(cs42l51);
598 error:
599 	return ret;
600 }
601 
602 static int cs42l51_i2c_remove(struct i2c_client *client)
603 {
604 	struct cs42l51_private *cs42l51 = i2c_get_clientdata(client);
605 
606 	snd_soc_unregister_codec(&client->dev);
607 	kfree(cs42l51);
608 	return 0;
609 }
610 
611 static const struct i2c_device_id cs42l51_id[] = {
612 	{"cs42l51", 0},
613 	{}
614 };
615 MODULE_DEVICE_TABLE(i2c, cs42l51_id);
616 
617 static struct i2c_driver cs42l51_i2c_driver = {
618 	.driver = {
619 		.name = "cs42l51-codec",
620 		.owner = THIS_MODULE,
621 	},
622 	.id_table = cs42l51_id,
623 	.probe = cs42l51_i2c_probe,
624 	.remove = cs42l51_i2c_remove,
625 };
626 
627 static int __init cs42l51_init(void)
628 {
629 	int ret;
630 
631 	ret = i2c_add_driver(&cs42l51_i2c_driver);
632 	if (ret != 0) {
633 		printk(KERN_ERR "%s: can't add i2c driver\n", __func__);
634 		return ret;
635 	}
636 	return 0;
637 }
638 module_init(cs42l51_init);
639 
640 static void __exit cs42l51_exit(void)
641 {
642 	i2c_del_driver(&cs42l51_i2c_driver);
643 }
644 module_exit(cs42l51_exit);
645 
646 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
647 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
648 MODULE_LICENSE("GPL");
649