[deliverable/linux.git] / sound / soc / codecs / cx20442.c

/*
 * cx20442.c  --  CX20442 ALSA Soc Audio driver
 *
 * Copyright 2009 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
 *
 * Initially based on sound/soc/codecs/wm8400.c
 * Copyright 2008, 2009 Wolfson Microelectronics PLC.
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#include <sound/core.h>
#include <sound/initval.h>
#include <sound/soc-dapm.h>

#include "cx20442.h"


struct cx20442_priv {
	struct snd_soc_codec codec;
	u8 reg_cache[1];
};

#define CX20442_PM		0x0

#define CX20442_TELIN		0
#define CX20442_TELOUT		1
#define CX20442_MIC		2
#define CX20442_SPKOUT		3
#define CX20442_AGC		4

static const struct snd_soc_dapm_widget cx20442_dapm_widgets[] = {
	SND_SOC_DAPM_OUTPUT("TELOUT"),
	SND_SOC_DAPM_OUTPUT("SPKOUT"),
	SND_SOC_DAPM_OUTPUT("AGCOUT"),

	SND_SOC_DAPM_MIXER("SPKOUT Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),

	SND_SOC_DAPM_PGA("TELOUT Amp", CX20442_PM, CX20442_TELOUT, 0, NULL, 0),
	SND_SOC_DAPM_PGA("SPKOUT Amp", CX20442_PM, CX20442_SPKOUT, 0, NULL, 0),
	SND_SOC_DAPM_PGA("SPKOUT AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),

	SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),

	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),

	SND_SOC_DAPM_MICBIAS("TELIN Bias", CX20442_PM, CX20442_TELIN, 0),
	SND_SOC_DAPM_MICBIAS("MIC Bias", CX20442_PM, CX20442_MIC, 0),

	SND_SOC_DAPM_PGA("MIC AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),

	SND_SOC_DAPM_INPUT("TELIN"),
	SND_SOC_DAPM_INPUT("MIC"),
	SND_SOC_DAPM_INPUT("AGCIN"),
};

static const struct snd_soc_dapm_route cx20442_audio_map[] = {
	{"TELOUT", NULL, "TELOUT Amp"},

	{"SPKOUT", NULL, "SPKOUT Mixer"},
	{"SPKOUT Mixer", NULL, "SPKOUT Amp"},

	{"TELOUT Amp", NULL, "DAC"},
	{"SPKOUT Amp", NULL, "DAC"},

	{"SPKOUT Mixer", NULL, "SPKOUT AGC"},
	{"SPKOUT AGC", NULL, "AGCIN"},

	{"AGCOUT", NULL, "MIC AGC"},
	{"MIC AGC", NULL, "MIC"},

	{"MIC Bias", NULL, "MIC"},
	{"Input Mixer", NULL, "MIC Bias"},

	{"TELIN Bias", NULL, "TELIN"},
	{"Input Mixer", NULL, "TELIN Bias"},

	{"ADC", NULL, "Input Mixer"},
};

static int cx20442_add_widgets(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, cx20442_dapm_widgets,
				  ARRAY_SIZE(cx20442_dapm_widgets));

	snd_soc_dapm_add_routes(codec, cx20442_audio_map,
				ARRAY_SIZE(cx20442_audio_map));

	snd_soc_dapm_new_widgets(codec);
	return 0;
}

static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec,
							unsigned int reg)
{
	u8 *reg_cache = codec->reg_cache;

	if (reg >= codec->reg_cache_size)
		return -EINVAL;

	return reg_cache[reg];
}

enum v253_vls {
	V253_VLS_NONE = 0,
	V253_VLS_T,
	V253_VLS_L,
	V253_VLS_LT,
	V253_VLS_S,
	V253_VLS_ST,
	V253_VLS_M,
	V253_VLS_MST,
	V253_VLS_S1,
	V253_VLS_S1T,
	V253_VLS_MS1T,
	V253_VLS_M1,
	V253_VLS_M1ST,
	V253_VLS_M1S1T,
	V253_VLS_H,
	V253_VLS_HT,
	V253_VLS_MS,
	V253_VLS_MS1,
	V253_VLS_M1S,
	V253_VLS_M1S1,
	V253_VLS_TEST,
};

static int cx20442_pm_to_v253_vls(u8 value)
{
	switch(value & ~(1 << CX20442_AGC)) {
	case 0:
		return V253_VLS_T;
	case (1 << CX20442_SPKOUT):
		return V253_VLS_S1;
	case (1 << CX20442_MIC):
		return V253_VLS_M1;
	case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC):
		return V253_VLS_M1S1;
	case (1 << CX20442_TELOUT):
	case (1 << CX20442_TELIN):
	case (1 << CX20442_TELOUT) | (1 << CX20442_TELIN):
		return V253_VLS_L;
	case (1 << CX20442_TELOUT) | (1 << CX20442_MIC):
		return V253_VLS_NONE;
	}
	return -EINVAL;
}
static int cx20442_pm_to_v253_vsp(u8 value)
{
	switch(value & ~(1 << CX20442_AGC)) {
	case (1 << CX20442_SPKOUT):
	case (1 << CX20442_MIC):
	case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC):
		return (bool)(value & (1 << CX20442_AGC));
	}
	return (value & (1 << CX20442_AGC)) ? -EINVAL : 0;
}

static int cx20442_write(struct snd_soc_codec *codec, unsigned int reg,
							unsigned int value)
{
	u8 *reg_cache = codec->reg_cache;
	int vls, vsp, old, len;
	char buf[18];

	if (reg >= codec->reg_cache_size)
		return -EINVAL;

	if (!codec->hw_write || !codec->control_data)
		return -EIO;

	old = reg_cache[reg];
	reg_cache[reg] = value;

	vls = cx20442_pm_to_v253_vls(value);
	if (vls < 0)
		return vls;

	vsp = cx20442_pm_to_v253_vsp(value);
	if (vsp < 0 )
		return vsp;

	if ((vls == V253_VLS_T) ||
			(vls == cx20442_pm_to_v253_vls(old))) {
		if (vsp == cx20442_pm_to_v253_vsp(old))
			return 0;
		len = snprintf(buf, ARRAY_SIZE(buf), "at+vsp=%d\r", vsp);
	} else if (vsp == cx20442_pm_to_v253_vsp(old))
		len = snprintf(buf, ARRAY_SIZE(buf), "at+vls=%d\r", vls);
	else
		len = snprintf(buf, ARRAY_SIZE(buf),
					"at+vls=%d;+vsp=%d\r", vls, vsp);

	if (unlikely(len > (ARRAY_SIZE(buf) - 1)))
		return -ENOMEM;

	if (codec->hw_write(codec->control_data, buf, len) != len)
		return -EIO;

	return 0;
}

struct snd_soc_dai cx20442_dai = {
	.name = "CX20442",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
};
EXPORT_SYMBOL_GPL(cx20442_dai);

static struct snd_soc_codec *cx20442_codec;

static int cx20442_codec_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;
	int ret;

	if(!cx20442_codec) {
		dev_err(&pdev->dev, "cx20442 not yet discovered\n");
		return -ENODEV;
	}
	codec = cx20442_codec;

	socdev->card->codec = codec;

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to create pcms\n");
		goto pcm_err;
	}

	cx20442_add_widgets(codec);

	ret = snd_soc_init_card(socdev);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to register card\n");
		goto card_err;
	}

	return ret;

card_err:
	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
pcm_err:
	return ret;
}

/* power down chip */
static int cx20442_codec_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);

	return 0;
}

struct snd_soc_codec_device cx20442_codec_dev = {
	.probe = 	cx20442_codec_probe,
	.remove = 	cx20442_codec_remove,
};
EXPORT_SYMBOL_GPL(cx20442_codec_dev);

static int cx20442_register(struct cx20442_priv *cx20442)
{
	struct snd_soc_codec *codec = &cx20442->codec;
	int ret;

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	codec->name = "CX20442";
	codec->owner = THIS_MODULE;
	codec->private_data = cx20442;

	codec->dai = &cx20442_dai;
	codec->num_dai = 1;

	codec->reg_cache = &cx20442->reg_cache;
	codec->reg_cache_size = ARRAY_SIZE(cx20442->reg_cache);
	codec->read = cx20442_read_reg_cache;
	codec->write = cx20442_write;

	codec->bias_level = SND_SOC_BIAS_OFF;

	cx20442_dai.dev = codec->dev;

	cx20442_codec = codec;

	ret = snd_soc_register_codec(codec);
	if (ret != 0) {
		//dev_err(&dev->dev, "Failed to register codec: %d\n", ret);
		goto err;
	}

	ret = snd_soc_register_dai(&cx20442_dai);
	if (ret != 0) {
		//dev_err(&dev->dev, "Failed to register DAI: %d\n", ret);
		goto err_codec;
	}

	return 0;

err_codec:
	snd_soc_unregister_codec(codec);
err:
	cx20442_codec = NULL;
	kfree(cx20442);
	return ret;
}

static void cx20442_unregister(struct cx20442_priv *cx20442)
{
	snd_soc_unregister_dai(&cx20442_dai);
	snd_soc_unregister_codec(&cx20442->codec);

	cx20442_codec = NULL;
	kfree(cx20442);
}

static int cx20442_platform_probe(struct platform_device *pdev)
{
	struct cx20442_priv *cx20442;
	struct snd_soc_codec *codec;

	cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL);
	if (cx20442 == NULL)
		return -ENOMEM;

	codec = &cx20442->codec;

	codec->control_data = NULL;
	codec->hw_write = NULL;
	codec->pop_time = 0;

	codec->dev = &pdev->dev;
	platform_set_drvdata(pdev, cx20442);

	return cx20442_register(cx20442);
}

static int __exit cx20442_platform_remove(struct platform_device *pdev)
{
	struct cx20442_priv *cx20442 = platform_get_drvdata(pdev);

	cx20442_unregister(cx20442);
	return 0;
}

static struct platform_driver cx20442_platform_driver = {
	.driver = {
		.name = "cx20442",
		.owner = THIS_MODULE,
		},
	.probe = cx20442_platform_probe,
	.remove = __exit_p(cx20442_platform_remove),
};

static int __init cx20442_init(void)
{
	return platform_driver_register(&cx20442_platform_driver);
}
module_init(cx20442_init);

static void __exit cx20442_exit(void)
{
	platform_driver_unregister(&cx20442_platform_driver);
}
module_exit(cx20442_exit);

MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver");
MODULE_AUTHOR("Janusz Krzysztofik");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:cx20442-codec");
Commit	Line	Data
459dc352 JK	1	/*
	2	* cx20442.c -- CX20442 ALSA Soc Audio driver
	3	*
	4	* Copyright 2009 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
	5	*
	6	* Initially based on sound/soc/codecs/wm8400.c
	7	* Copyright 2008, 2009 Wolfson Microelectronics PLC.
	8	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*/
	15
	16	#include <sound/core.h>
	17	#include <sound/initval.h>
	18	#include <sound/soc-dapm.h>
	19
	20	#include "cx20442.h"
	21
	22
	23	struct cx20442_priv {
	24	struct snd_soc_codec codec;
	25	u8 reg_cache[1];
	26	};
	27
	28	#define CX20442_PM 0x0
	29
	30	#define CX20442_TELIN 0
	31	#define CX20442_TELOUT 1
	32	#define CX20442_MIC 2
	33	#define CX20442_SPKOUT 3
	34	#define CX20442_AGC 4
	35
	36	static const struct snd_soc_dapm_widget cx20442_dapm_widgets[] = {
	37	SND_SOC_DAPM_OUTPUT("TELOUT"),
	38	SND_SOC_DAPM_OUTPUT("SPKOUT"),
	39	SND_SOC_DAPM_OUTPUT("AGCOUT"),
	40
	41	SND_SOC_DAPM_MIXER("SPKOUT Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
	42
	43	SND_SOC_DAPM_PGA("TELOUT Amp", CX20442_PM, CX20442_TELOUT, 0, NULL, 0),
	44	SND_SOC_DAPM_PGA("SPKOUT Amp", CX20442_PM, CX20442_SPKOUT, 0, NULL, 0),
	45	SND_SOC_DAPM_PGA("SPKOUT AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
	46
	47	SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
	48	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
	49
	50	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
	51
	52	SND_SOC_DAPM_MICBIAS("TELIN Bias", CX20442_PM, CX20442_TELIN, 0),
	53	SND_SOC_DAPM_MICBIAS("MIC Bias", CX20442_PM, CX20442_MIC, 0),
	54
	55	SND_SOC_DAPM_PGA("MIC AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
	56
	57	SND_SOC_DAPM_INPUT("TELIN"),
	58	SND_SOC_DAPM_INPUT("MIC"),
	59	SND_SOC_DAPM_INPUT("AGCIN"),
	60	};
	61
	62	static const struct snd_soc_dapm_route cx20442_audio_map[] = {
	63	{"TELOUT", NULL, "TELOUT Amp"},
	64
65	{"SPKOUT", NULL, "SPKOUT Mixer"},
66	{"SPKOUT Mixer", NULL, "SPKOUT Amp"},
67
68	{"TELOUT Amp", NULL, "DAC"},
69	{"SPKOUT Amp", NULL, "DAC"},
70
71	{"SPKOUT Mixer", NULL, "SPKOUT AGC"},
72	{"SPKOUT AGC", NULL, "AGCIN"},
73
74	{"AGCOUT", NULL, "MIC AGC"},
75	{"MIC AGC", NULL, "MIC"},
76
77	{"MIC Bias", NULL, "MIC"},
78	{"Input Mixer", NULL, "MIC Bias"},
79
80	{"TELIN Bias", NULL, "TELIN"},
81	{"Input Mixer", NULL, "TELIN Bias"},
82
83	{"ADC", NULL, "Input Mixer"},
84	};
85
86	static int cx20442_add_widgets(struct snd_soc_codec *codec)
87	{
88	snd_soc_dapm_new_controls(codec, cx20442_dapm_widgets,
89	ARRAY_SIZE(cx20442_dapm_widgets));
90
91	snd_soc_dapm_add_routes(codec, cx20442_audio_map,
92	ARRAY_SIZE(cx20442_audio_map));
93
94	snd_soc_dapm_new_widgets(codec);
95	return 0;
96	}
97
98	static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec,
99	unsigned int reg)
100	{
101	u8 *reg_cache = codec->reg_cache;
102
103	if (reg >= codec->reg_cache_size)
104	return -EINVAL;
105
106	return reg_cache[reg];
107	}
108
109	enum v253_vls {
110	V253_VLS_NONE = 0,
111	V253_VLS_T,
112	V253_VLS_L,
113	V253_VLS_LT,
114	V253_VLS_S,
115	V253_VLS_ST,
116	V253_VLS_M,
117	V253_VLS_MST,
118	V253_VLS_S1,
119	V253_VLS_S1T,
120	V253_VLS_MS1T,
121	V253_VLS_M1,
122	V253_VLS_M1ST,
123	V253_VLS_M1S1T,
124	V253_VLS_H,
125	V253_VLS_HT,
126	V253_VLS_MS,
127	V253_VLS_MS1,
128	V253_VLS_M1S,
129	V253_VLS_M1S1,
130	V253_VLS_TEST,
131	};
132
133	static int cx20442_pm_to_v253_vls(u8 value)
134	{
135	switch(value & ~(1 << CX20442_AGC)) {
136	case 0:
137	return V253_VLS_T;
138	case (1 << CX20442_SPKOUT):
139	return V253_VLS_S1;
140	case (1 << CX20442_MIC):
141	return V253_VLS_M1;
142	case (1 << CX20442_SPKOUT) \| (1 << CX20442_MIC):
143	return V253_VLS_M1S1;
144	case (1 << CX20442_TELOUT):
145	case (1 << CX20442_TELIN):
146	case (1 << CX20442_TELOUT) \| (1 << CX20442_TELIN):
147	return V253_VLS_L;
148	case (1 << CX20442_TELOUT) \| (1 << CX20442_MIC):
149	return V253_VLS_NONE;
150	}
151	return -EINVAL;
152	}
153	static int cx20442_pm_to_v253_vsp(u8 value)
154	{
155	switch(value & ~(1 << CX20442_AGC)) {
156	case (1 << CX20442_SPKOUT):
157	case (1 << CX20442_MIC):
158	case (1 << CX20442_SPKOUT) \| (1 << CX20442_MIC):
159	return (bool)(value & (1 << CX20442_AGC));
160	}
161	return (value & (1 << CX20442_AGC)) ? -EINVAL : 0;
162	}
163
164	static int cx20442_write(struct snd_soc_codec *codec, unsigned int reg,
165	unsigned int value)
166	{
167	u8 *reg_cache = codec->reg_cache;
168	int vls, vsp, old, len;
169	char buf[18];
170
171	if (reg >= codec->reg_cache_size)
172	return -EINVAL;
173
174	if (!codec->hw_write \|\| !codec->control_data)
175	return -EIO;
176
177	old = reg_cache[reg];
178	reg_cache[reg] = value;
179
180	vls = cx20442_pm_to_v253_vls(value);
181	if (vls < 0)
182	return vls;
183
184	vsp = cx20442_pm_to_v253_vsp(value);
185	if (vsp < 0 )
186	return vsp;
187
188	if ((vls == V253_VLS_T) \|\|
189	(vls == cx20442_pm_to_v253_vls(old))) {
190	if (vsp == cx20442_pm_to_v253_vsp(old))
191	return 0;
192	len = snprintf(buf, ARRAY_SIZE(buf), "at+vsp=%d\r", vsp);
193	} else if (vsp == cx20442_pm_to_v253_vsp(old))
194	len = snprintf(buf, ARRAY_SIZE(buf), "at+vls=%d\r", vls);
195	else
196	len = snprintf(buf, ARRAY_SIZE(buf),
197	"at+vls=%d;+vsp=%d\r", vls, vsp);
198
199	if (unlikely(len > (ARRAY_SIZE(buf) - 1)))
200	return -ENOMEM;
201
202	if (codec->hw_write(codec->control_data, buf, len) != len)
203	return -EIO;
204
205	return 0;
206	}
207
208	struct snd_soc_dai cx20442_dai = {
209	.name = "CX20442",
210	.playback = {
211	.stream_name = "Playback",
212	.channels_min = 1,
213	.channels_max = 1,
214	.rates = SNDRV_PCM_RATE_8000,
215	.formats = SNDRV_PCM_FMTBIT_S16_LE,
216	},
217	.capture = {
218	.stream_name = "Capture",
219	.channels_min = 1,
220	.channels_max = 1,
221	.rates = SNDRV_PCM_RATE_8000,
222	.formats = SNDRV_PCM_FMTBIT_S16_LE,
223	},
224	};
225	EXPORT_SYMBOL_GPL(cx20442_dai);
226
227	static struct snd_soc_codec *cx20442_codec;
228
229	static int cx20442_codec_probe(struct platform_device *pdev)
230	{
231	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
232	struct snd_soc_codec *codec;
233	int ret;
234
235	if(!cx20442_codec) {
236	dev_err(&pdev->dev, "cx20442 not yet discovered\n");
237	return -ENODEV;
238	}
239	codec = cx20442_codec;
240
241	socdev->card->codec = codec;
242
243	/* register pcms */
244	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
245	if (ret < 0) {
246	dev_err(&pdev->dev, "failed to create pcms\n");
247	goto pcm_err;
248	}
249
250	cx20442_add_widgets(codec);
251
252	ret = snd_soc_init_card(socdev);
253	if (ret < 0) {
254	dev_err(&pdev->dev, "failed to register card\n");
255	goto card_err;
256	}
257
258	return ret;
259
260	card_err:
261	snd_soc_free_pcms(socdev);
262	snd_soc_dapm_free(socdev);
263	pcm_err:
264	return ret;
265	}
266
267	/* power down chip */
268	static int cx20442_codec_remove(struct platform_device *pdev)
269	{
270	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
271
272	snd_soc_free_pcms(socdev);
273	snd_soc_dapm_free(socdev);
274
275	return 0;
276	}
277
278	struct snd_soc_codec_device cx20442_codec_dev = {
279	.probe = cx20442_codec_probe,
280	.remove = cx20442_codec_remove,
281	};
282	EXPORT_SYMBOL_GPL(cx20442_codec_dev);
283
284	static int cx20442_register(struct cx20442_priv *cx20442)
285	{
286	struct snd_soc_codec *codec = &cx20442->codec;
287	int ret;
288
289	mutex_init(&codec->mutex);
290	INIT_LIST_HEAD(&codec->dapm_widgets);
291	INIT_LIST_HEAD(&codec->dapm_paths);
292
293	codec->name = "CX20442";
294	codec->owner = THIS_MODULE;
295	codec->private_data = cx20442;
296
297	codec->dai = &cx20442_dai;
298	codec->num_dai = 1;
299
300	codec->reg_cache = &cx20442->reg_cache;
301	codec->reg_cache_size = ARRAY_SIZE(cx20442->reg_cache);
302	codec->read = cx20442_read_reg_cache;
303	codec->write = cx20442_write;
304
305	codec->bias_level = SND_SOC_BIAS_OFF;
306
307	cx20442_dai.dev = codec->dev;
308
309	cx20442_codec = codec;
310
311	ret = snd_soc_register_codec(codec);
312	if (ret != 0) {
313	//dev_err(&dev->dev, "Failed to register codec: %d\n", ret);
314	goto err;
315	}
316
317	ret = snd_soc_register_dai(&cx20442_dai);
318	if (ret != 0) {
319	//dev_err(&dev->dev, "Failed to register DAI: %d\n", ret);
320	goto err_codec;
321	}
322
323	return 0;
324
325	err_codec:
326	snd_soc_unregister_codec(codec);
327	err:
328	cx20442_codec = NULL;
329	kfree(cx20442);
330	return ret;
331	}
332
333	static void cx20442_unregister(struct cx20442_priv *cx20442)
334	{
335	snd_soc_unregister_dai(&cx20442_dai);
336	snd_soc_unregister_codec(&cx20442->codec);
337
338	cx20442_codec = NULL;
339	kfree(cx20442);
340	}
341
342	static int cx20442_platform_probe(struct platform_device *pdev)
343	{
344	struct cx20442_priv *cx20442;
345	struct snd_soc_codec *codec;
346
347	cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL);
348	if (cx20442 == NULL)
349	return -ENOMEM;
350
351	codec = &cx20442->codec;
352
353	codec->control_data = NULL;
354	codec->hw_write = NULL;
355	codec->pop_time = 0;
356
357	codec->dev = &pdev->dev;
358	platform_set_drvdata(pdev, cx20442);
359
360	return cx20442_register(cx20442);
361	}
362
363	static int __exit cx20442_platform_remove(struct platform_device *pdev)
364	{
365	struct cx20442_priv *cx20442 = platform_get_drvdata(pdev);
366
367	cx20442_unregister(cx20442);
368	return 0;
369	}
370
371	static struct platform_driver cx20442_platform_driver = {
372	.driver = {
373	.name = "cx20442",
374	.owner = THIS_MODULE,
375	},
376	.probe = cx20442_platform_probe,
377	.remove = __exit_p(cx20442_platform_remove),
378	};
379
380	static int __init cx20442_init(void)
381	{
382	return platform_driver_register(&cx20442_platform_driver);
383	}
384	module_init(cx20442_init);
385
386	static void __exit cx20442_exit(void)
387	{
388	platform_driver_unregister(&cx20442_platform_driver);
389	}
390	module_exit(cx20442_exit);
391
392	MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver");
393	MODULE_AUTHOR("Janusz Krzysztofik");
394	MODULE_LICENSE("GPL");
395	MODULE_ALIAS("platform:cx20442-codec");