[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 <linux/tty.h>
#include <linux/slab.h>

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

#include "cx20442.h"


struct cx20442_priv {
	enum snd_soc_control_type control_type;
	void *control_data;
};

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

	if (reg >= codec->driver->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):
	case (1 << CX20442_MIC):
	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)
{
	struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);
	u8 *reg_cache = codec->reg_cache;
	int vls, vsp, old, len;
	char buf[18];

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

	/* hw_write and control_data pointers required for talking to the modem
	 * are expected to be set by the line discipline initialization code */
	if (!codec->hw_write || !cx20442->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;

	dev_dbg(codec->dev, "%s: %s\n", __func__, buf);
	if (codec->hw_write(cx20442->control_data, buf, len) != len)
		return -EIO;

	return 0;
}


/*
 * Line discpline related code
 *
 * Any of the callback functions below can be used in two ways:
 * 1) registerd by a machine driver as one of line discipline operations,
 * 2) called from a machine's provided line discipline callback function
 *    in case when extra machine specific code must be run as well.
 */

/* Modem init: echo off, digital speaker off, quiet off, voice mode */
static const char *v253_init = "ate0m0q0+fclass=8\r";

/* Line discipline .open() */
static int v253_open(struct tty_struct *tty)
{
	int ret, len = strlen(v253_init);

	/* Doesn't make sense without write callback */
	if (!tty->ops->write)
		return -EINVAL;

	/* Won't work if no codec pointer has been passed by a card driver */
	if (!tty->disc_data)
		return -ENODEV;

	if (tty->ops->write(tty, v253_init, len) != len) {
		ret = -EIO;
		goto err;
	}
	/* Actual setup will be performed after the modem responds. */
	return 0;
err:
	tty->disc_data = NULL;
	return ret;
}

/* Line discipline .close() */
static void v253_close(struct tty_struct *tty)
{
	struct snd_soc_codec *codec = tty->disc_data;
	struct cx20442_priv *cx20442;

	tty->disc_data = NULL;

	if (!codec)
		return;

	cx20442 = snd_soc_codec_get_drvdata(codec);

	/* Prevent the codec driver from further accessing the modem */
	codec->hw_write = NULL;
	cx20442->control_data = NULL;
	codec->card->pop_time = 0;
}

/* Line discipline .hangup() */
static int v253_hangup(struct tty_struct *tty)
{
	v253_close(tty);
	return 0;
}

/* Line discipline .receive_buf() */
static void v253_receive(struct tty_struct *tty,
				const unsigned char *cp, char *fp, int count)
{
	struct snd_soc_codec *codec = tty->disc_data;
	struct cx20442_priv *cx20442;

	if (!codec)
		return;

	cx20442 = snd_soc_codec_get_drvdata(codec);

	if (!cx20442->control_data) {
		/* First modem response, complete setup procedure */

		/* Set up codec driver access to modem controls */
		cx20442->control_data = tty;
		codec->hw_write = (hw_write_t)tty->ops->write;
		codec->card->pop_time = 1;
	}
}

/* Line discipline .write_wakeup() */
static void v253_wakeup(struct tty_struct *tty)
{
}

struct tty_ldisc_ops v253_ops = {
	.magic = TTY_LDISC_MAGIC,
	.name = "cx20442",
	.owner = THIS_MODULE,
	.open = v253_open,
	.close = v253_close,
	.hangup = v253_hangup,
	.receive_buf = v253_receive,
	.write_wakeup = v253_wakeup,
};
EXPORT_SYMBOL_GPL(v253_ops);


/*
 * Codec DAI
 */

static struct snd_soc_dai_driver cx20442_dai = {
	.name = "cx20442-voice",
	.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,
	},
};

static int cx20442_codec_probe(struct snd_soc_codec *codec)
{
	struct cx20442_priv *cx20442;

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

	cx20442->control_data = NULL;
	codec->hw_write = NULL;
	codec->card->pop_time = 0;

	return 0;
}

/* power down chip */
static int cx20442_codec_remove(struct snd_soc_codec *codec)
{
	struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);

	if (cx20442->control_data) {
			struct tty_struct *tty = cx20442->control_data;
			tty_hangup(tty);
	}

	kfree(cx20442);
	return 0;
}

static const u8 cx20442_reg;

static struct snd_soc_codec_driver cx20442_codec_dev = {
	.probe = 	cx20442_codec_probe,
	.remove = 	cx20442_codec_remove,
	.reg_cache_default = &cx20442_reg,
	.reg_cache_size = 1,
	.reg_word_size = sizeof(u8),
	.read = cx20442_read_reg_cache,
	.write = cx20442_write,
	.dapm_widgets = cx20442_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(cx20442_dapm_widgets),
	.dapm_routes = cx20442_audio_map,
	.num_dapm_routes = ARRAY_SIZE(cx20442_audio_map),
};

static int cx20442_platform_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev,
			&cx20442_codec_dev, &cx20442_dai, 1);
}

static int __exit cx20442_platform_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
}

static struct platform_driver cx20442_platform_driver = {
	.driver = {
		.name = "cx20442-codec",
		.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
ad120dae	16	#include <linux/tty.h>
5a0e3ad6	17	#include <linux/slab.h>
ad120dae	18
459dc352 JK	19	#include <sound/core.h>
459dc352 JK	20	#include <sound/initval.h>
ce6120cc	21	#include <sound/soc.h>
459dc352 JK	22
	23	#include "cx20442.h"
	24
	25
	26	struct cx20442_priv {
f0fba2ad LG	27	enum snd_soc_control_type control_type;
f0fba2ad LG	28	void *control_data;
459dc352 JK	29	};
	30
	31	#define CX20442_PM 0x0
	32
	33	#define CX20442_TELIN 0
	34	#define CX20442_TELOUT 1
	35	#define CX20442_MIC 2
	36	#define CX20442_SPKOUT 3
	37	#define CX20442_AGC 4
	38
	39	static const struct snd_soc_dapm_widget cx20442_dapm_widgets[] = {
	40	SND_SOC_DAPM_OUTPUT("TELOUT"),
	41	SND_SOC_DAPM_OUTPUT("SPKOUT"),
	42	SND_SOC_DAPM_OUTPUT("AGCOUT"),
	43
	44	SND_SOC_DAPM_MIXER("SPKOUT Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
	45
	46	SND_SOC_DAPM_PGA("TELOUT Amp", CX20442_PM, CX20442_TELOUT, 0, NULL, 0),
	47	SND_SOC_DAPM_PGA("SPKOUT Amp", CX20442_PM, CX20442_SPKOUT, 0, NULL, 0),
	48	SND_SOC_DAPM_PGA("SPKOUT AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
	49
	50	SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
	51	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
	52
	53	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
	54
	55	SND_SOC_DAPM_MICBIAS("TELIN Bias", CX20442_PM, CX20442_TELIN, 0),
	56	SND_SOC_DAPM_MICBIAS("MIC Bias", CX20442_PM, CX20442_MIC, 0),
	57
	58	SND_SOC_DAPM_PGA("MIC AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
	59
	60	SND_SOC_DAPM_INPUT("TELIN"),
	61	SND_SOC_DAPM_INPUT("MIC"),
	62	SND_SOC_DAPM_INPUT("AGCIN"),
	63	};
	64
	65	static const struct snd_soc_dapm_route cx20442_audio_map[] = {
	66	{"TELOUT", NULL, "TELOUT Amp"},
	67
	68	{"SPKOUT", NULL, "SPKOUT Mixer"},
	69	{"SPKOUT Mixer", NULL, "SPKOUT Amp"},
	70
	71	{"TELOUT Amp", NULL, "DAC"},
	72	{"SPKOUT Amp", NULL, "DAC"},
	73
	74	{"SPKOUT Mixer", NULL, "SPKOUT AGC"},
	75	{"SPKOUT AGC", NULL, "AGCIN"},
	76
	77	{"AGCOUT", NULL, "MIC AGC"},
	78	{"MIC AGC", NULL, "MIC"},
	79
	80	{"MIC Bias", NULL, "MIC"},
	81	{"Input Mixer", NULL, "MIC Bias"},
	82
	83	{"TELIN Bias", NULL, "TELIN"},
	84	{"Input Mixer", NULL, "TELIN Bias"},
	85
	86	{"ADC", NULL, "Input Mixer"},
	87	};
	88
459dc352 JK	89	static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec,
	90	unsigned int reg)
	91	{
	92	u8 *reg_cache = codec->reg_cache;
	93
f0fba2ad	94	if (reg >= codec->driver->reg_cache_size)
459dc352 JK	95	return -EINVAL;
	96
	97	return reg_cache[reg];
	98	}
	99
	100	enum v253_vls {
	101	V253_VLS_NONE = 0,
	102	V253_VLS_T,
	103	V253_VLS_L,
	104	V253_VLS_LT,
	105	V253_VLS_S,
	106	V253_VLS_ST,
	107	V253_VLS_M,
	108	V253_VLS_MST,
	109	V253_VLS_S1,
	110	V253_VLS_S1T,
	111	V253_VLS_MS1T,
	112	V253_VLS_M1,
	113	V253_VLS_M1ST,
	114	V253_VLS_M1S1T,
	115	V253_VLS_H,
	116	V253_VLS_HT,
	117	V253_VLS_MS,
	118	V253_VLS_MS1,
	119	V253_VLS_M1S,
	120	V253_VLS_M1S1,
	121	V253_VLS_TEST,
	122	};
	123
	124	static int cx20442_pm_to_v253_vls(u8 value)
	125	{
b84eab08	126	switch (value & ~(1 << CX20442_AGC)) {
459dc352 JK	127	case 0:
	128	return V253_VLS_T;
	129	case (1 << CX20442_SPKOUT):
459dc352	130	case (1 << CX20442_MIC):
459dc352 JK	131	case (1 << CX20442_SPKOUT) \| (1 << CX20442_MIC):
	132	return V253_VLS_M1S1;
	133	case (1 << CX20442_TELOUT):
	134	case (1 << CX20442_TELIN):
	135	case (1 << CX20442_TELOUT) \| (1 << CX20442_TELIN):
	136	return V253_VLS_L;
	137	case (1 << CX20442_TELOUT) \| (1 << CX20442_MIC):
	138	return V253_VLS_NONE;
	139	}
	140	return -EINVAL;
	141	}
	142	static int cx20442_pm_to_v253_vsp(u8 value)
	143	{
b84eab08	144	switch (value & ~(1 << CX20442_AGC)) {
459dc352 JK	145	case (1 << CX20442_SPKOUT):
	146	case (1 << CX20442_MIC):
	147	case (1 << CX20442_SPKOUT) \| (1 << CX20442_MIC):
	148	return (bool)(value & (1 << CX20442_AGC));
	149	}
	150	return (value & (1 << CX20442_AGC)) ? -EINVAL : 0;
	151	}
	152
	153	static int cx20442_write(struct snd_soc_codec *codec, unsigned int reg,
	154	unsigned int value)
	155	{
f0fba2ad	156	struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);
459dc352 JK	157	u8 *reg_cache = codec->reg_cache;
	158	int vls, vsp, old, len;
	159	char buf[18];
	160
f0fba2ad	161	if (reg >= codec->driver->reg_cache_size)
459dc352 JK	162	return -EINVAL;
459dc352 JK	163
b84eab08	164	/* hw_write and control_data pointers required for talking to the modem
ad120dae	165	* are expected to be set by the line discipline initialization code */
f0fba2ad	166	if (!codec->hw_write \|\| !cx20442->control_data)
459dc352 JK	167	return -EIO;
	168
	169	old = reg_cache[reg];
	170	reg_cache[reg] = value;
	171
	172	vls = cx20442_pm_to_v253_vls(value);
	173	if (vls < 0)
	174	return vls;
	175
	176	vsp = cx20442_pm_to_v253_vsp(value);
b84eab08	177	if (vsp < 0)
459dc352 JK	178	return vsp;
	179
	180	if ((vls == V253_VLS_T) \|\|
	181	(vls == cx20442_pm_to_v253_vls(old))) {
	182	if (vsp == cx20442_pm_to_v253_vsp(old))
	183	return 0;
	184	len = snprintf(buf, ARRAY_SIZE(buf), "at+vsp=%d\r", vsp);
	185	} else if (vsp == cx20442_pm_to_v253_vsp(old))
	186	len = snprintf(buf, ARRAY_SIZE(buf), "at+vls=%d\r", vls);
	187	else
	188	len = snprintf(buf, ARRAY_SIZE(buf),
	189	"at+vls=%d;+vsp=%d\r", vls, vsp);
	190
	191	if (unlikely(len > (ARRAY_SIZE(buf) - 1)))
	192	return -ENOMEM;
	193
4977b03e	194	dev_dbg(codec->dev, "%s: %s\n", __func__, buf);
f0fba2ad	195	if (codec->hw_write(cx20442->control_data, buf, len) != len)
459dc352 JK	196	return -EIO;
	197
	198	return 0;
	199	}
	200
ad120dae	201
ad120dae JK	202	/*
	203	* Line discpline related code
	204	*
	205	* Any of the callback functions below can be used in two ways:
	206	* 1) registerd by a machine driver as one of line discipline operations,
	207	* 2) called from a machine's provided line discipline callback function
	208	* in case when extra machine specific code must be run as well.
	209	*/
	210
	211	/* Modem init: echo off, digital speaker off, quiet off, voice mode */
	212	static const char *v253_init = "ate0m0q0+fclass=8\r";
	213
	214	/* Line discipline .open() */
	215	static int v253_open(struct tty_struct *tty)
	216	{
ad120dae JK	217	int ret, len = strlen(v253_init);
	218
	219	/* Doesn't make sense without write callback */
	220	if (!tty->ops->write)
	221	return -EINVAL;
	222
f0fba2ad LG	223	/* Won't work if no codec pointer has been passed by a card driver */
	224	if (!tty->disc_data)
	225	return -ENODEV;
ad120dae JK	226
	227	if (tty->ops->write(tty, v253_init, len) != len) {
	228	ret = -EIO;
	229	goto err;
	230	}
	231	/* Actual setup will be performed after the modem responds. */
	232	return 0;
	233	err:
	234	tty->disc_data = NULL;
	235	return ret;
	236	}
	237
	238	/* Line discipline .close() */
	239	static void v253_close(struct tty_struct *tty)
	240	{
	241	struct snd_soc_codec *codec = tty->disc_data;
f0fba2ad	242	struct cx20442_priv *cx20442;
ad120dae JK	243
	244	tty->disc_data = NULL;
	245
	246	if (!codec)
	247	return;
	248
f0fba2ad LG	249	cx20442 = snd_soc_codec_get_drvdata(codec);
f0fba2ad LG	250
ad120dae JK	251	/* Prevent the codec driver from further accessing the modem */
ad120dae JK	252	codec->hw_write = NULL;
f0fba2ad	253	cx20442->control_data = NULL;
3a45b867	254	codec->card->pop_time = 0;
ad120dae JK	255	}
	256
	257	/* Line discipline .hangup() */
	258	static int v253_hangup(struct tty_struct *tty)
	259	{
	260	v253_close(tty);
	261	return 0;
	262	}
	263
	264	/* Line discipline .receive_buf() */
bb3d6bf1 LT	265	static void v253_receive(struct tty_struct *tty,
bb3d6bf1 LT	266	const unsigned char cp, char fp, int count)
ad120dae JK	267	{
ad120dae JK	268	struct snd_soc_codec *codec = tty->disc_data;
f0fba2ad	269	struct cx20442_priv *cx20442;
ad120dae JK	270
ad120dae JK	271	if (!codec)
bb3d6bf1	272	return;
ad120dae	273
f0fba2ad LG	274	cx20442 = snd_soc_codec_get_drvdata(codec);
	275
	276	if (!cx20442->control_data) {
ad120dae JK	277	/* First modem response, complete setup procedure */
	278
	279	/* Set up codec driver access to modem controls */
f0fba2ad	280	cx20442->control_data = tty;
ad120dae	281	codec->hw_write = (hw_write_t)tty->ops->write;
3a45b867	282	codec->card->pop_time = 1;
ad120dae JK	283	}
	284	}
	285
	286	/* Line discipline .write_wakeup() */
	287	static void v253_wakeup(struct tty_struct *tty)
	288	{
	289	}
	290
	291	struct tty_ldisc_ops v253_ops = {
	292	.magic = TTY_LDISC_MAGIC,
	293	.name = "cx20442",
	294	.owner = THIS_MODULE,
	295	.open = v253_open,
	296	.close = v253_close,
	297	.hangup = v253_hangup,
	298	.receive_buf = v253_receive,
	299	.write_wakeup = v253_wakeup,
	300	};
	301	EXPORT_SYMBOL_GPL(v253_ops);
	302
	303
	304	/*
	305	* Codec DAI
	306	*/
	307
f0fba2ad	308	static struct snd_soc_dai_driver cx20442_dai = {
5394637a	309	.name = "cx20442-voice",
459dc352 JK	310	.playback = {
	311	.stream_name = "Playback",
	312	.channels_min = 1,
	313	.channels_max = 1,
	314	.rates = SNDRV_PCM_RATE_8000,
	315	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	316	},
	317	.capture = {
	318	.stream_name = "Capture",
	319	.channels_min = 1,
	320	.channels_max = 1,
	321	.rates = SNDRV_PCM_RATE_8000,
	322	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	323	},
	324	};
459dc352	325
f0fba2ad	326	static int cx20442_codec_probe(struct snd_soc_codec *codec)
459dc352	327	{
f0fba2ad	328	struct cx20442_priv *cx20442;
459dc352	329
f0fba2ad LG	330	cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL);
	331	if (cx20442 == NULL)
	332	return -ENOMEM;
	333	snd_soc_codec_set_drvdata(codec, cx20442);
459dc352	334
f0fba2ad LG	335	cx20442->control_data = NULL;
f0fba2ad LG	336	codec->hw_write = NULL;
3a45b867	337	codec->card->pop_time = 0;
f0fba2ad LG	338
f0fba2ad LG	339	return 0;
459dc352 JK	340	}
	341
	342	/* power down chip */
f0fba2ad	343	static int cx20442_codec_remove(struct snd_soc_codec *codec)
459dc352	344	{
f0fba2ad	345	struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);
459dc352	346
f0fba2ad LG	347	if (cx20442->control_data) {
	348	struct tty_struct *tty = cx20442->control_data;
	349	tty_hangup(tty);
	350	}
459dc352	351
f0fba2ad	352	kfree(cx20442);
459dc352 JK	353	return 0;
	354	}
	355
8e6bfb9b	356	static const u8 cx20442_reg;
f019ee5f	357
f0fba2ad	358	static struct snd_soc_codec_driver cx20442_codec_dev = {
459dc352 JK	359	.probe = cx20442_codec_probe,
459dc352 JK	360	.remove = cx20442_codec_remove,
f019ee5f	361	.reg_cache_default = &cx20442_reg,
f0fba2ad LG	362	.reg_cache_size = 1,
	363	.reg_word_size = sizeof(u8),
	364	.read = cx20442_read_reg_cache,
	365	.write = cx20442_write,
51fb1a87 LG	366	.dapm_widgets = cx20442_dapm_widgets,
	367	.num_dapm_widgets = ARRAY_SIZE(cx20442_dapm_widgets),
	368	.dapm_routes = cx20442_audio_map,
	369	.num_dapm_routes = ARRAY_SIZE(cx20442_audio_map),
459dc352	370	};
459dc352 JK	371
	372	static int cx20442_platform_probe(struct platform_device *pdev)
	373	{
f0fba2ad LG	374	return snd_soc_register_codec(&pdev->dev,
f0fba2ad LG	375	&cx20442_codec_dev, &cx20442_dai, 1);
459dc352 JK	376	}
	377
	378	static int __exit cx20442_platform_remove(struct platform_device *pdev)
	379	{
f0fba2ad	380	snd_soc_unregister_codec(&pdev->dev);
459dc352 JK	381	return 0;
	382	}
	383
	384	static struct platform_driver cx20442_platform_driver = {
	385	.driver = {
f0fba2ad	386	.name = "cx20442-codec",
459dc352 JK	387	.owner = THIS_MODULE,
	388	},
	389	.probe = cx20442_platform_probe,
	390	.remove = __exit_p(cx20442_platform_remove),
	391	};
	392
	393	static int __init cx20442_init(void)
	394	{
	395	return platform_driver_register(&cx20442_platform_driver);
	396	}
	397	module_init(cx20442_init);
	398
	399	static void __exit cx20442_exit(void)
	400	{
	401	platform_driver_unregister(&cx20442_platform_driver);
	402	}
	403	module_exit(cx20442_exit);
	404
	405	MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver");
	406	MODULE_AUTHOR("Janusz Krzysztofik");
	407	MODULE_LICENSE("GPL");
f0fba2ad	408	MODULE_ALIAS("platform:cx20442-codec");