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16#include <linux/tty.h>
17
18#include <sound/core.h>
19#include <sound/initval.h>
20#include <sound/soc-dapm.h>
21
22#include "cx20442.h"
23
24
25struct cx20442_priv {
26 struct snd_soc_codec codec;
27 u8 reg_cache[1];
28};
29
30#define CX20442_PM 0x0
31
32#define CX20442_TELIN 0
33#define CX20442_TELOUT 1
34#define CX20442_MIC 2
35#define CX20442_SPKOUT 3
36#define CX20442_AGC 4
37
38static const struct snd_soc_dapm_widget cx20442_dapm_widgets[] = {
39 SND_SOC_DAPM_OUTPUT("TELOUT"),
40 SND_SOC_DAPM_OUTPUT("SPKOUT"),
41 SND_SOC_DAPM_OUTPUT("AGCOUT"),
42
43 SND_SOC_DAPM_MIXER("SPKOUT Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
44
45 SND_SOC_DAPM_PGA("TELOUT Amp", CX20442_PM, CX20442_TELOUT, 0, NULL, 0),
46 SND_SOC_DAPM_PGA("SPKOUT Amp", CX20442_PM, CX20442_SPKOUT, 0, NULL, 0),
47 SND_SOC_DAPM_PGA("SPKOUT AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
48
49 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
50 SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
51
52 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
53
54 SND_SOC_DAPM_MICBIAS("TELIN Bias", CX20442_PM, CX20442_TELIN, 0),
55 SND_SOC_DAPM_MICBIAS("MIC Bias", CX20442_PM, CX20442_MIC, 0),
56
57 SND_SOC_DAPM_PGA("MIC AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
58
59 SND_SOC_DAPM_INPUT("TELIN"),
60 SND_SOC_DAPM_INPUT("MIC"),
61 SND_SOC_DAPM_INPUT("AGCIN"),
62};
63
64static const struct snd_soc_dapm_route cx20442_audio_map[] = {
65 {"TELOUT", NULL, "TELOUT Amp"},
66
67 {"SPKOUT", NULL, "SPKOUT Mixer"},
68 {"SPKOUT Mixer", NULL, "SPKOUT Amp"},
69
70 {"TELOUT Amp", NULL, "DAC"},
71 {"SPKOUT Amp", NULL, "DAC"},
72
73 {"SPKOUT Mixer", NULL, "SPKOUT AGC"},
74 {"SPKOUT AGC", NULL, "AGCIN"},
75
76 {"AGCOUT", NULL, "MIC AGC"},
77 {"MIC AGC", NULL, "MIC"},
78
79 {"MIC Bias", NULL, "MIC"},
80 {"Input Mixer", NULL, "MIC Bias"},
81
82 {"TELIN Bias", NULL, "TELIN"},
83 {"Input Mixer", NULL, "TELIN Bias"},
84
85 {"ADC", NULL, "Input Mixer"},
86};
87
88static int cx20442_add_widgets(struct snd_soc_codec *codec)
89{
90 snd_soc_dapm_new_controls(codec, cx20442_dapm_widgets,
91 ARRAY_SIZE(cx20442_dapm_widgets));
92
93 snd_soc_dapm_add_routes(codec, cx20442_audio_map,
94 ARRAY_SIZE(cx20442_audio_map));
95
96 snd_soc_dapm_new_widgets(codec);
97 return 0;
98}
99
100static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec,
101 unsigned int reg)
102{
103 u8 *reg_cache = codec->reg_cache;
104
105 if (reg >= codec->reg_cache_size)
106 return -EINVAL;
107
108 return reg_cache[reg];
109}
110
111enum v253_vls {
112 V253_VLS_NONE = 0,
113 V253_VLS_T,
114 V253_VLS_L,
115 V253_VLS_LT,
116 V253_VLS_S,
117 V253_VLS_ST,
118 V253_VLS_M,
119 V253_VLS_MST,
120 V253_VLS_S1,
121 V253_VLS_S1T,
122 V253_VLS_MS1T,
123 V253_VLS_M1,
124 V253_VLS_M1ST,
125 V253_VLS_M1S1T,
126 V253_VLS_H,
127 V253_VLS_HT,
128 V253_VLS_MS,
129 V253_VLS_MS1,
130 V253_VLS_M1S,
131 V253_VLS_M1S1,
132 V253_VLS_TEST,
133};
134
135static int cx20442_pm_to_v253_vls(u8 value)
136{
137 switch (value & ~(1 << CX20442_AGC)) {
138 case 0:
139 return V253_VLS_T;
140 case (1 << CX20442_SPKOUT):
141 case (1 << CX20442_MIC):
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}
153static 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
164static 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
175
176 if (!codec->hw_write || !codec->control_data)
177 return -EIO;
178
179 old = reg_cache[reg];
180 reg_cache[reg] = value;
181
182 vls = cx20442_pm_to_v253_vls(value);
183 if (vls < 0)
184 return vls;
185
186 vsp = cx20442_pm_to_v253_vsp(value);
187 if (vsp < 0)
188 return vsp;
189
190 if ((vls == V253_VLS_T) ||
191 (vls == cx20442_pm_to_v253_vls(old))) {
192 if (vsp == cx20442_pm_to_v253_vsp(old))
193 return 0;
194 len = snprintf(buf, ARRAY_SIZE(buf), "at+vsp=%d\r", vsp);
195 } else if (vsp == cx20442_pm_to_v253_vsp(old))
196 len = snprintf(buf, ARRAY_SIZE(buf), "at+vls=%d\r", vls);
197 else
198 len = snprintf(buf, ARRAY_SIZE(buf),
199 "at+vls=%d;+vsp=%d\r", vls, vsp);
200
201 if (unlikely(len > (ARRAY_SIZE(buf) - 1)))
202 return -ENOMEM;
203
204 dev_dbg(codec->dev, "%s: %s\n", __func__, buf);
205 if (codec->hw_write(codec->control_data, buf, len) != len)
206 return -EIO;
207
208 return 0;
209}
210
211
212
213static struct snd_soc_codec *cx20442_codec;
214
215
216
217
218
219
220
221
222
223
224
225
226static const char *v253_init = "ate0m0q0+fclass=8\r";
227
228
229static int v253_open(struct tty_struct *tty)
230{
231 struct snd_soc_codec *codec = cx20442_codec;
232 int ret, len = strlen(v253_init);
233
234
235 if (!tty->ops->write)
236 return -EINVAL;
237
238
239 tty->disc_data = codec;
240
241 if (tty->ops->write(tty, v253_init, len) != len) {
242 ret = -EIO;
243 goto err;
244 }
245
246 return 0;
247err:
248 tty->disc_data = NULL;
249 return ret;
250}
251
252
253static void v253_close(struct tty_struct *tty)
254{
255 struct snd_soc_codec *codec = tty->disc_data;
256
257 tty->disc_data = NULL;
258
259 if (!codec)
260 return;
261
262
263 codec->hw_write = NULL;
264 codec->control_data = NULL;
265 codec->pop_time = 0;
266}
267
268
269static int v253_hangup(struct tty_struct *tty)
270{
271 v253_close(tty);
272 return 0;
273}
274
275
276static void v253_receive(struct tty_struct *tty,
277 const unsigned char *cp, char *fp, int count)
278{
279 struct snd_soc_codec *codec = tty->disc_data;
280
281 if (!codec)
282 return;
283
284 if (!codec->control_data) {
285
286
287
288 codec->control_data = tty;
289 codec->hw_write = (hw_write_t)tty->ops->write;
290 codec->pop_time = 1;
291 }
292}
293
294
295static void v253_wakeup(struct tty_struct *tty)
296{
297}
298
299struct tty_ldisc_ops v253_ops = {
300 .magic = TTY_LDISC_MAGIC,
301 .name = "cx20442",
302 .owner = THIS_MODULE,
303 .open = v253_open,
304 .close = v253_close,
305 .hangup = v253_hangup,
306 .receive_buf = v253_receive,
307 .write_wakeup = v253_wakeup,
308};
309EXPORT_SYMBOL_GPL(v253_ops);
310
311
312
313
314
315
316struct snd_soc_dai cx20442_dai = {
317 .name = "CX20442",
318 .playback = {
319 .stream_name = "Playback",
320 .channels_min = 1,
321 .channels_max = 1,
322 .rates = SNDRV_PCM_RATE_8000,
323 .formats = SNDRV_PCM_FMTBIT_S16_LE,
324 },
325 .capture = {
326 .stream_name = "Capture",
327 .channels_min = 1,
328 .channels_max = 1,
329 .rates = SNDRV_PCM_RATE_8000,
330 .formats = SNDRV_PCM_FMTBIT_S16_LE,
331 },
332};
333EXPORT_SYMBOL_GPL(cx20442_dai);
334
335static int cx20442_codec_probe(struct platform_device *pdev)
336{
337 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
338 struct snd_soc_codec *codec;
339 int ret;
340
341 if (!cx20442_codec) {
342 dev_err(&pdev->dev, "cx20442 not yet discovered\n");
343 return -ENODEV;
344 }
345 codec = cx20442_codec;
346
347 socdev->card->codec = codec;
348
349
350 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
351 if (ret < 0) {
352 dev_err(&pdev->dev, "failed to create pcms\n");
353 goto pcm_err;
354 }
355
356 cx20442_add_widgets(codec);
357
358 ret = snd_soc_init_card(socdev);
359 if (ret < 0) {
360 dev_err(&pdev->dev, "failed to register card\n");
361 goto card_err;
362 }
363
364 return ret;
365
366card_err:
367 snd_soc_free_pcms(socdev);
368 snd_soc_dapm_free(socdev);
369pcm_err:
370 return ret;
371}
372
373
374static int cx20442_codec_remove(struct platform_device *pdev)
375{
376 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
377
378 snd_soc_free_pcms(socdev);
379 snd_soc_dapm_free(socdev);
380
381 return 0;
382}
383
384struct snd_soc_codec_device cx20442_codec_dev = {
385 .probe = cx20442_codec_probe,
386 .remove = cx20442_codec_remove,
387};
388EXPORT_SYMBOL_GPL(cx20442_codec_dev);
389
390static int cx20442_register(struct cx20442_priv *cx20442)
391{
392 struct snd_soc_codec *codec = &cx20442->codec;
393 int ret;
394
395 mutex_init(&codec->mutex);
396 INIT_LIST_HEAD(&codec->dapm_widgets);
397 INIT_LIST_HEAD(&codec->dapm_paths);
398
399 codec->name = "CX20442";
400 codec->owner = THIS_MODULE;
401 codec->private_data = cx20442;
402
403 codec->dai = &cx20442_dai;
404 codec->num_dai = 1;
405
406 codec->reg_cache = &cx20442->reg_cache;
407 codec->reg_cache_size = ARRAY_SIZE(cx20442->reg_cache);
408 codec->read = cx20442_read_reg_cache;
409 codec->write = cx20442_write;
410
411 codec->bias_level = SND_SOC_BIAS_OFF;
412
413 cx20442_dai.dev = codec->dev;
414
415 cx20442_codec = codec;
416
417 ret = snd_soc_register_codec(codec);
418 if (ret != 0) {
419 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
420 goto err;
421 }
422
423 ret = snd_soc_register_dai(&cx20442_dai);
424 if (ret != 0) {
425 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
426 goto err_codec;
427 }
428
429 return 0;
430
431err_codec:
432 snd_soc_unregister_codec(codec);
433err:
434 cx20442_codec = NULL;
435 kfree(cx20442);
436 return ret;
437}
438
439static void cx20442_unregister(struct cx20442_priv *cx20442)
440{
441 snd_soc_unregister_dai(&cx20442_dai);
442 snd_soc_unregister_codec(&cx20442->codec);
443
444 cx20442_codec = NULL;
445 kfree(cx20442);
446}
447
448static int cx20442_platform_probe(struct platform_device *pdev)
449{
450 struct cx20442_priv *cx20442;
451 struct snd_soc_codec *codec;
452
453 cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL);
454 if (cx20442 == NULL)
455 return -ENOMEM;
456
457 codec = &cx20442->codec;
458
459 codec->control_data = NULL;
460 codec->hw_write = NULL;
461 codec->pop_time = 0;
462
463 codec->dev = &pdev->dev;
464 platform_set_drvdata(pdev, cx20442);
465
466 return cx20442_register(cx20442);
467}
468
469static int __exit cx20442_platform_remove(struct platform_device *pdev)
470{
471 struct cx20442_priv *cx20442 = platform_get_drvdata(pdev);
472
473 cx20442_unregister(cx20442);
474 return 0;
475}
476
477static struct platform_driver cx20442_platform_driver = {
478 .driver = {
479 .name = "cx20442",
480 .owner = THIS_MODULE,
481 },
482 .probe = cx20442_platform_probe,
483 .remove = __exit_p(cx20442_platform_remove),
484};
485
486static int __init cx20442_init(void)
487{
488 return platform_driver_register(&cx20442_platform_driver);
489}
490module_init(cx20442_init);
491
492static void __exit cx20442_exit(void)
493{
494 platform_driver_unregister(&cx20442_platform_driver);
495}
496module_exit(cx20442_exit);
497
498MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver");
499MODULE_AUTHOR("Janusz Krzysztofik");
500MODULE_LICENSE("GPL");
501MODULE_ALIAS("platform:cx20442");
502
