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16#include <linux/tty.h>
17#include <linux/slab.h>
18#include <linux/module.h>
19#include <linux/regulator/consumer.h>
20
21#include <sound/core.h>
22#include <sound/initval.h>
23#include <sound/soc.h>
24
25#include "cx20442.h"
26
27
28struct cx20442_priv {
29 void *control_data;
30 struct regulator *por;
31};
32
33#define CX20442_PM 0x0
34
35#define CX20442_TELIN 0
36#define CX20442_TELOUT 1
37#define CX20442_MIC 2
38#define CX20442_SPKOUT 3
39#define CX20442_AGC 4
40
41static const struct snd_soc_dapm_widget cx20442_dapm_widgets[] = {
42 SND_SOC_DAPM_OUTPUT("TELOUT"),
43 SND_SOC_DAPM_OUTPUT("SPKOUT"),
44 SND_SOC_DAPM_OUTPUT("AGCOUT"),
45
46 SND_SOC_DAPM_MIXER("SPKOUT Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
47
48 SND_SOC_DAPM_PGA("TELOUT Amp", CX20442_PM, CX20442_TELOUT, 0, NULL, 0),
49 SND_SOC_DAPM_PGA("SPKOUT Amp", CX20442_PM, CX20442_SPKOUT, 0, NULL, 0),
50 SND_SOC_DAPM_PGA("SPKOUT AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
51
52 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
53 SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
54
55 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
56
57 SND_SOC_DAPM_MICBIAS("TELIN Bias", CX20442_PM, CX20442_TELIN, 0),
58 SND_SOC_DAPM_MICBIAS("MIC Bias", CX20442_PM, CX20442_MIC, 0),
59
60 SND_SOC_DAPM_PGA("MIC AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
61
62 SND_SOC_DAPM_INPUT("TELIN"),
63 SND_SOC_DAPM_INPUT("MIC"),
64 SND_SOC_DAPM_INPUT("AGCIN"),
65};
66
67static const struct snd_soc_dapm_route cx20442_audio_map[] = {
68 {"TELOUT", NULL, "TELOUT Amp"},
69
70 {"SPKOUT", NULL, "SPKOUT Mixer"},
71 {"SPKOUT Mixer", NULL, "SPKOUT Amp"},
72
73 {"TELOUT Amp", NULL, "DAC"},
74 {"SPKOUT Amp", NULL, "DAC"},
75
76 {"SPKOUT Mixer", NULL, "SPKOUT AGC"},
77 {"SPKOUT AGC", NULL, "AGCIN"},
78
79 {"AGCOUT", NULL, "MIC AGC"},
80 {"MIC AGC", NULL, "MIC"},
81
82 {"MIC Bias", NULL, "MIC"},
83 {"Input Mixer", NULL, "MIC Bias"},
84
85 {"TELIN Bias", NULL, "TELIN"},
86 {"Input Mixer", NULL, "TELIN Bias"},
87
88 {"ADC", NULL, "Input Mixer"},
89};
90
91static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec,
92 unsigned int reg)
93{
94 u8 *reg_cache = codec->reg_cache;
95
96 if (reg >= codec->driver->reg_cache_size)
97 return -EINVAL;
98
99 return reg_cache[reg];
100}
101
102enum v253_vls {
103 V253_VLS_NONE = 0,
104 V253_VLS_T,
105 V253_VLS_L,
106 V253_VLS_LT,
107 V253_VLS_S,
108 V253_VLS_ST,
109 V253_VLS_M,
110 V253_VLS_MST,
111 V253_VLS_S1,
112 V253_VLS_S1T,
113 V253_VLS_MS1T,
114 V253_VLS_M1,
115 V253_VLS_M1ST,
116 V253_VLS_M1S1T,
117 V253_VLS_H,
118 V253_VLS_HT,
119 V253_VLS_MS,
120 V253_VLS_MS1,
121 V253_VLS_M1S,
122 V253_VLS_M1S1,
123 V253_VLS_TEST,
124};
125
126static int cx20442_pm_to_v253_vls(u8 value)
127{
128 switch (value & ~(1 << CX20442_AGC)) {
129 case 0:
130 return V253_VLS_T;
131 case (1 << CX20442_SPKOUT):
132 case (1 << CX20442_MIC):
133 case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC):
134 return V253_VLS_M1S1;
135 case (1 << CX20442_TELOUT):
136 case (1 << CX20442_TELIN):
137 case (1 << CX20442_TELOUT) | (1 << CX20442_TELIN):
138 return V253_VLS_L;
139 case (1 << CX20442_TELOUT) | (1 << CX20442_MIC):
140 return V253_VLS_NONE;
141 }
142 return -EINVAL;
143}
144static int cx20442_pm_to_v253_vsp(u8 value)
145{
146 switch (value & ~(1 << CX20442_AGC)) {
147 case (1 << CX20442_SPKOUT):
148 case (1 << CX20442_MIC):
149 case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC):
150 return (bool)(value & (1 << CX20442_AGC));
151 }
152 return (value & (1 << CX20442_AGC)) ? -EINVAL : 0;
153}
154
155static int cx20442_write(struct snd_soc_codec *codec, unsigned int reg,
156 unsigned int value)
157{
158 struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);
159 u8 *reg_cache = codec->reg_cache;
160 int vls, vsp, old, len;
161 char buf[18];
162
163 if (reg >= codec->driver->reg_cache_size)
164 return -EINVAL;
165
166
167
168 if (!codec->hw_write || !cx20442->control_data)
169 return -EIO;
170
171 old = reg_cache[reg];
172 reg_cache[reg] = value;
173
174 vls = cx20442_pm_to_v253_vls(value);
175 if (vls < 0)
176 return vls;
177
178 vsp = cx20442_pm_to_v253_vsp(value);
179 if (vsp < 0)
180 return vsp;
181
182 if ((vls == V253_VLS_T) ||
183 (vls == cx20442_pm_to_v253_vls(old))) {
184 if (vsp == cx20442_pm_to_v253_vsp(old))
185 return 0;
186 len = snprintf(buf, ARRAY_SIZE(buf), "at+vsp=%d\r", vsp);
187 } else if (vsp == cx20442_pm_to_v253_vsp(old))
188 len = snprintf(buf, ARRAY_SIZE(buf), "at+vls=%d\r", vls);
189 else
190 len = snprintf(buf, ARRAY_SIZE(buf),
191 "at+vls=%d;+vsp=%d\r", vls, vsp);
192
193 if (unlikely(len > (ARRAY_SIZE(buf) - 1)))
194 return -ENOMEM;
195
196 dev_dbg(codec->dev, "%s: %s\n", __func__, buf);
197 if (codec->hw_write(cx20442->control_data, buf, len) != len)
198 return -EIO;
199
200 return 0;
201}
202
203
204
205
206
207
208
209
210
211
212
213
214static const char *v253_init = "ate0m0q0+fclass=8\r";
215
216
217static int v253_open(struct tty_struct *tty)
218{
219 int ret, len = strlen(v253_init);
220
221
222 if (!tty->ops->write)
223 return -EINVAL;
224
225
226 if (!tty->disc_data)
227 return -ENODEV;
228
229 if (tty->ops->write(tty, v253_init, len) != len) {
230 ret = -EIO;
231 goto err;
232 }
233
234 return 0;
235err:
236 tty->disc_data = NULL;
237 return ret;
238}
239
240
241static void v253_close(struct tty_struct *tty)
242{
243 struct snd_soc_codec *codec = tty->disc_data;
244 struct cx20442_priv *cx20442;
245
246 tty->disc_data = NULL;
247
248 if (!codec)
249 return;
250
251 cx20442 = snd_soc_codec_get_drvdata(codec);
252
253
254 codec->hw_write = NULL;
255 cx20442->control_data = NULL;
256 codec->component.card->pop_time = 0;
257}
258
259
260static int v253_hangup(struct tty_struct *tty)
261{
262 v253_close(tty);
263 return 0;
264}
265
266
267static void v253_receive(struct tty_struct *tty,
268 const unsigned char *cp, char *fp, int count)
269{
270 struct snd_soc_codec *codec = tty->disc_data;
271 struct cx20442_priv *cx20442;
272
273 if (!codec)
274 return;
275
276 cx20442 = snd_soc_codec_get_drvdata(codec);
277
278 if (!cx20442->control_data) {
279
280
281
282 cx20442->control_data = tty;
283 codec->hw_write = (hw_write_t)tty->ops->write;
284 codec->component.card->pop_time = 1;
285 }
286}
287
288
289static void v253_wakeup(struct tty_struct *tty)
290{
291}
292
293struct tty_ldisc_ops v253_ops = {
294 .magic = TTY_LDISC_MAGIC,
295 .name = "cx20442",
296 .owner = THIS_MODULE,
297 .open = v253_open,
298 .close = v253_close,
299 .hangup = v253_hangup,
300 .receive_buf = v253_receive,
301 .write_wakeup = v253_wakeup,
302};
303EXPORT_SYMBOL_GPL(v253_ops);
304
305
306
307
308
309
310static struct snd_soc_dai_driver cx20442_dai = {
311 .name = "cx20442-voice",
312 .playback = {
313 .stream_name = "Playback",
314 .channels_min = 1,
315 .channels_max = 1,
316 .rates = SNDRV_PCM_RATE_8000,
317 .formats = SNDRV_PCM_FMTBIT_S16_LE,
318 },
319 .capture = {
320 .stream_name = "Capture",
321 .channels_min = 1,
322 .channels_max = 1,
323 .rates = SNDRV_PCM_RATE_8000,
324 .formats = SNDRV_PCM_FMTBIT_S16_LE,
325 },
326};
327
328static int cx20442_set_bias_level(struct snd_soc_codec *codec,
329 enum snd_soc_bias_level level)
330{
331 struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);
332 int err = 0;
333
334 switch (level) {
335 case SND_SOC_BIAS_PREPARE:
336 if (snd_soc_codec_get_bias_level(codec) != SND_SOC_BIAS_STANDBY)
337 break;
338 if (IS_ERR(cx20442->por))
339 err = PTR_ERR(cx20442->por);
340 else
341 err = regulator_enable(cx20442->por);
342 break;
343 case SND_SOC_BIAS_STANDBY:
344 if (snd_soc_codec_get_bias_level(codec) != SND_SOC_BIAS_PREPARE)
345 break;
346 if (IS_ERR(cx20442->por))
347 err = PTR_ERR(cx20442->por);
348 else
349 err = regulator_disable(cx20442->por);
350 break;
351 default:
352 break;
353 }
354
355 return err;
356}
357
358static int cx20442_codec_probe(struct snd_soc_codec *codec)
359{
360 struct cx20442_priv *cx20442;
361
362 cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL);
363 if (cx20442 == NULL)
364 return -ENOMEM;
365
366 cx20442->por = regulator_get(codec->dev, "POR");
367 if (IS_ERR(cx20442->por))
368 dev_warn(codec->dev, "failed to get the regulator");
369 cx20442->control_data = NULL;
370
371 snd_soc_codec_set_drvdata(codec, cx20442);
372 codec->hw_write = NULL;
373 codec->component.card->pop_time = 0;
374
375 return 0;
376}
377
378
379static int cx20442_codec_remove(struct snd_soc_codec *codec)
380{
381 struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec);
382
383 if (cx20442->control_data) {
384 struct tty_struct *tty = cx20442->control_data;
385 tty_hangup(tty);
386 }
387
388 if (!IS_ERR(cx20442->por)) {
389
390 regulator_put(cx20442->por);
391 }
392
393 snd_soc_codec_set_drvdata(codec, NULL);
394 kfree(cx20442);
395 return 0;
396}
397
398static const u8 cx20442_reg;
399
400static struct snd_soc_codec_driver cx20442_codec_dev = {
401 .probe = cx20442_codec_probe,
402 .remove = cx20442_codec_remove,
403 .set_bias_level = cx20442_set_bias_level,
404 .reg_cache_default = &cx20442_reg,
405 .reg_cache_size = 1,
406 .reg_word_size = sizeof(u8),
407 .read = cx20442_read_reg_cache,
408 .write = cx20442_write,
409 .dapm_widgets = cx20442_dapm_widgets,
410 .num_dapm_widgets = ARRAY_SIZE(cx20442_dapm_widgets),
411 .dapm_routes = cx20442_audio_map,
412 .num_dapm_routes = ARRAY_SIZE(cx20442_audio_map),
413};
414
415static int cx20442_platform_probe(struct platform_device *pdev)
416{
417 return snd_soc_register_codec(&pdev->dev,
418 &cx20442_codec_dev, &cx20442_dai, 1);
419}
420
421static int cx20442_platform_remove(struct platform_device *pdev)
422{
423 snd_soc_unregister_codec(&pdev->dev);
424 return 0;
425}
426
427static struct platform_driver cx20442_platform_driver = {
428 .driver = {
429 .name = "cx20442-codec",
430 },
431 .probe = cx20442_platform_probe,
432 .remove = cx20442_platform_remove,
433};
434
435module_platform_driver(cx20442_platform_driver);
436
437MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver");
438MODULE_AUTHOR("Janusz Krzysztofik");
439MODULE_LICENSE("GPL");
440MODULE_ALIAS("platform:cx20442-codec");
441
