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Janusz Krzysztofik459dc352009-07-22 05:22:28 +02001/*
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
Janusz Krzysztofikad120da2009-07-29 12:24:46 +020016#include <linux/tty.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Janusz Krzysztofikad120da2009-07-29 12:24:46 +020018
Janusz Krzysztofik459dc352009-07-22 05:22:28 +020019#include <sound/core.h>
20#include <sound/initval.h>
Liam Girdwoodce6120c2010-11-05 15:53:46 +020021#include <sound/soc.h>
Janusz Krzysztofik459dc352009-07-22 05:22:28 +020022
23#include "cx20442.h"
24
25
26struct cx20442_priv {
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000027 enum snd_soc_control_type control_type;
28 void *control_data;
Janusz Krzysztofik459dc352009-07-22 05:22:28 +020029};
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
39static 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
65static 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
Janusz Krzysztofik459dc352009-07-22 05:22:28 +020089static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec,
90 unsigned int reg)
91{
92 u8 *reg_cache = codec->reg_cache;
93
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000094 if (reg >= codec->driver->reg_cache_size)
Janusz Krzysztofik459dc352009-07-22 05:22:28 +020095 return -EINVAL;
96
97 return reg_cache[reg];
98}
99
100enum 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
124static int cx20442_pm_to_v253_vls(u8 value)
125{
Janusz Krzysztofikb84eab02009-07-28 20:24:12 +0200126 switch (value & ~(1 << CX20442_AGC)) {
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200127 case 0:
128 return V253_VLS_T;
129 case (1 << CX20442_SPKOUT):
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200130 case (1 << CX20442_MIC):
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200131 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}
142static int cx20442_pm_to_v253_vsp(u8 value)
143{
Janusz Krzysztofikb84eab02009-07-28 20:24:12 +0200144 switch (value & ~(1 << CX20442_AGC)) {
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200145 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
153static int cx20442_write(struct snd_soc_codec *codec, unsigned int reg,
154 unsigned int value)
155{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000156 struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200157 u8 *reg_cache = codec->reg_cache;
158 int vls, vsp, old, len;
159 char buf[18];
160
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000161 if (reg >= codec->driver->reg_cache_size)
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200162 return -EINVAL;
163
Janusz Krzysztofikb84eab02009-07-28 20:24:12 +0200164 /* hw_write and control_data pointers required for talking to the modem
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200165 * are expected to be set by the line discipline initialization code */
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000166 if (!codec->hw_write || !cx20442->control_data)
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200167 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);
Janusz Krzysztofikb84eab02009-07-28 20:24:12 +0200177 if (vsp < 0)
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200178 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
Janusz Krzysztofik4977b032009-08-06 12:24:54 +0200194 dev_dbg(codec->dev, "%s: %s\n", __func__, buf);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000195 if (codec->hw_write(cx20442->control_data, buf, len) != len)
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200196 return -EIO;
197
198 return 0;
199}
200
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200201
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200202/*
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 */
212static const char *v253_init = "ate0m0q0+fclass=8\r";
213
214/* Line discipline .open() */
215static int v253_open(struct tty_struct *tty)
216{
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200217 int ret, len = strlen(v253_init);
218
219 /* Doesn't make sense without write callback */
220 if (!tty->ops->write)
221 return -EINVAL;
222
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000223 /* Won't work if no codec pointer has been passed by a card driver */
224 if (!tty->disc_data)
225 return -ENODEV;
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200226
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;
233err:
234 tty->disc_data = NULL;
235 return ret;
236}
237
238/* Line discipline .close() */
239static void v253_close(struct tty_struct *tty)
240{
241 struct snd_soc_codec *codec = tty->disc_data;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000242 struct cx20442_priv *cx20442;
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200243
244 tty->disc_data = NULL;
245
246 if (!codec)
247 return;
248
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000249 cx20442 = snd_soc_codec_get_drvdata(codec);
250
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200251 /* Prevent the codec driver from further accessing the modem */
252 codec->hw_write = NULL;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000253 cx20442->control_data = NULL;
Jarkko Nikula3a45b862010-11-05 20:35:21 +0200254 codec->card->pop_time = 0;
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200255}
256
257/* Line discipline .hangup() */
258static int v253_hangup(struct tty_struct *tty)
259{
260 v253_close(tty);
261 return 0;
262}
263
264/* Line discipline .receive_buf() */
Linus Torvaldsbb3d6bf2011-06-04 07:00:50 +0900265static void v253_receive(struct tty_struct *tty,
266 const unsigned char *cp, char *fp, int count)
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200267{
268 struct snd_soc_codec *codec = tty->disc_data;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000269 struct cx20442_priv *cx20442;
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200270
271 if (!codec)
Linus Torvaldsbb3d6bf2011-06-04 07:00:50 +0900272 return;
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200273
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000274 cx20442 = snd_soc_codec_get_drvdata(codec);
275
276 if (!cx20442->control_data) {
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200277 /* First modem response, complete setup procedure */
278
279 /* Set up codec driver access to modem controls */
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000280 cx20442->control_data = tty;
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200281 codec->hw_write = (hw_write_t)tty->ops->write;
Jarkko Nikula3a45b862010-11-05 20:35:21 +0200282 codec->card->pop_time = 1;
Janusz Krzysztofikad120da2009-07-29 12:24:46 +0200283 }
284}
285
286/* Line discipline .write_wakeup() */
287static void v253_wakeup(struct tty_struct *tty)
288{
289}
290
291struct 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};
301EXPORT_SYMBOL_GPL(v253_ops);
302
303
304/*
305 * Codec DAI
306 */
307
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000308static struct snd_soc_dai_driver cx20442_dai = {
Janusz Krzysztofik53946372010-08-19 15:15:50 +0200309 .name = "cx20442-voice",
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200310 .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};
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200325
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000326static int cx20442_codec_probe(struct snd_soc_codec *codec)
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200327{
328 struct cx20442_priv *cx20442;
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200329
330 cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL);
331 if (cx20442 == NULL)
332 return -ENOMEM;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000333 snd_soc_codec_set_drvdata(codec, cx20442);
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200334
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000335 cx20442->control_data = NULL;
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200336 codec->hw_write = NULL;
Jarkko Nikula3a45b862010-11-05 20:35:21 +0200337 codec->card->pop_time = 0;
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200338
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000339 return 0;
340}
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200341
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000342/* power down chip */
343static int cx20442_codec_remove(struct snd_soc_codec *codec)
344{
345 struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);
346
347 if (cx20442->control_data) {
348 struct tty_struct *tty = cx20442->control_data;
349 tty_hangup(tty);
350 }
351
352 kfree(cx20442);
353 return 0;
354}
355
Janusz Krzysztofik8e6bfb92011-02-10 13:24:32 +0100356static const u8 cx20442_reg;
Janusz Krzysztofikf019ee52011-02-01 13:01:17 +0100357
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000358static struct snd_soc_codec_driver cx20442_codec_dev = {
359 .probe = cx20442_codec_probe,
360 .remove = cx20442_codec_remove,
Janusz Krzysztofikf019ee52011-02-01 13:01:17 +0100361 .reg_cache_default = &cx20442_reg,
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000362 .reg_cache_size = 1,
363 .reg_word_size = sizeof(u8),
364 .read = cx20442_read_reg_cache,
365 .write = cx20442_write,
Lu Guanqun51fb1a82011-03-30 21:53:09 +0800366 .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),
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000370};
371
372static int cx20442_platform_probe(struct platform_device *pdev)
373{
374 return snd_soc_register_codec(&pdev->dev,
375 &cx20442_codec_dev, &cx20442_dai, 1);
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200376}
377
378static int __exit cx20442_platform_remove(struct platform_device *pdev)
379{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000380 snd_soc_unregister_codec(&pdev->dev);
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200381 return 0;
382}
383
384static struct platform_driver cx20442_platform_driver = {
385 .driver = {
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000386 .name = "cx20442-codec",
Janusz Krzysztofik459dc352009-07-22 05:22:28 +0200387 .owner = THIS_MODULE,
388 },
389 .probe = cx20442_platform_probe,
390 .remove = __exit_p(cx20442_platform_remove),
391};
392
393static int __init cx20442_init(void)
394{
395 return platform_driver_register(&cx20442_platform_driver);
396}
397module_init(cx20442_init);
398
399static void __exit cx20442_exit(void)
400{
401 platform_driver_unregister(&cx20442_platform_driver);
402}
403module_exit(cx20442_exit);
404
405MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver");
406MODULE_AUTHOR("Janusz Krzysztofik");
407MODULE_LICENSE("GPL");
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000408MODULE_ALIAS("platform:cx20442-codec");