summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/cx20442.c
blob: 7bbb77baa231661f2857f31cfa542d7d0c7896a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
/*
 * 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;

	/* hw_write and control_data pointers required for talking to the modem
	 * are expected to be set by the machine driver's line discipline
	 * initialization code */
	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(&codec->dev, "Failed to register codec: %d\n", ret);
		goto err;
	}

	ret = snd_soc_register_dai(&cx20442_dai);
	if (ret != 0) {
		dev_err(&codec->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");