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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 struct tty_struct *tty;
30 struct regulator *por;
31 u8 reg_cache;
32};
33
34#define CX20442_PM 0x0
35
36#define CX20442_TELIN 0
37#define CX20442_TELOUT 1
38#define CX20442_MIC 2
39#define CX20442_SPKOUT 3
40#define CX20442_AGC 4
41
42static const struct snd_soc_dapm_widget cx20442_dapm_widgets[] = {
43 SND_SOC_DAPM_OUTPUT("TELOUT"),
44 SND_SOC_DAPM_OUTPUT("SPKOUT"),
45 SND_SOC_DAPM_OUTPUT("AGCOUT"),
46
47 SND_SOC_DAPM_MIXER("SPKOUT Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
48
49 SND_SOC_DAPM_PGA("TELOUT Amp", CX20442_PM, CX20442_TELOUT, 0, NULL, 0),
50 SND_SOC_DAPM_PGA("SPKOUT Amp", CX20442_PM, CX20442_SPKOUT, 0, NULL, 0),
51 SND_SOC_DAPM_PGA("SPKOUT AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
52
53 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
54 SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
55
56 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
57
58 SND_SOC_DAPM_MICBIAS("TELIN Bias", CX20442_PM, CX20442_TELIN, 0),
59 SND_SOC_DAPM_MICBIAS("MIC Bias", CX20442_PM, CX20442_MIC, 0),
60
61 SND_SOC_DAPM_PGA("MIC AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0),
62
63 SND_SOC_DAPM_INPUT("TELIN"),
64 SND_SOC_DAPM_INPUT("MIC"),
65 SND_SOC_DAPM_INPUT("AGCIN"),
66};
67
68static const struct snd_soc_dapm_route cx20442_audio_map[] = {
69 {"TELOUT", NULL, "TELOUT Amp"},
70
71 {"SPKOUT", NULL, "SPKOUT Mixer"},
72 {"SPKOUT Mixer", NULL, "SPKOUT Amp"},
73
74 {"TELOUT Amp", NULL, "DAC"},
75 {"SPKOUT Amp", NULL, "DAC"},
76
77 {"SPKOUT Mixer", NULL, "SPKOUT AGC"},
78 {"SPKOUT AGC", NULL, "AGCIN"},
79
80 {"AGCOUT", NULL, "MIC AGC"},
81 {"MIC AGC", NULL, "MIC"},
82
83 {"MIC Bias", NULL, "MIC"},
84 {"Input Mixer", NULL, "MIC Bias"},
85
86 {"TELIN Bias", NULL, "TELIN"},
87 {"Input Mixer", NULL, "TELIN Bias"},
88
89 {"ADC", NULL, "Input Mixer"},
90};
91
92static unsigned int cx20442_read_reg_cache(struct snd_soc_component *component,
93 unsigned int reg)
94{
95 struct cx20442_priv *cx20442 = snd_soc_component_get_drvdata(component);
96
97 if (reg >= 1)
98 return -EINVAL;
99
100 return cx20442->reg_cache;
101}
102
103enum v253_vls {
104 V253_VLS_NONE = 0,
105 V253_VLS_T,
106 V253_VLS_L,
107 V253_VLS_LT,
108 V253_VLS_S,
109 V253_VLS_ST,
110 V253_VLS_M,
111 V253_VLS_MST,
112 V253_VLS_S1,
113 V253_VLS_S1T,
114 V253_VLS_MS1T,
115 V253_VLS_M1,
116 V253_VLS_M1ST,
117 V253_VLS_M1S1T,
118 V253_VLS_H,
119 V253_VLS_HT,
120 V253_VLS_MS,
121 V253_VLS_MS1,
122 V253_VLS_M1S,
123 V253_VLS_M1S1,
124 V253_VLS_TEST,
125};
126
127static int cx20442_pm_to_v253_vls(u8 value)
128{
129 switch (value & ~(1 << CX20442_AGC)) {
130 case 0:
131 return V253_VLS_T;
132 case (1 << CX20442_SPKOUT):
133 case (1 << CX20442_MIC):
134 case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC):
135 return V253_VLS_M1S1;
136 case (1 << CX20442_TELOUT):
137 case (1 << CX20442_TELIN):
138 case (1 << CX20442_TELOUT) | (1 << CX20442_TELIN):
139 return V253_VLS_L;
140 case (1 << CX20442_TELOUT) | (1 << CX20442_MIC):
141 return V253_VLS_NONE;
142 }
143 return -EINVAL;
144}
145static int cx20442_pm_to_v253_vsp(u8 value)
146{
147 switch (value & ~(1 << CX20442_AGC)) {
148 case (1 << CX20442_SPKOUT):
149 case (1 << CX20442_MIC):
150 case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC):
151 return (bool)(value & (1 << CX20442_AGC));
152 }
153 return (value & (1 << CX20442_AGC)) ? -EINVAL : 0;
154}
155
156static int cx20442_write(struct snd_soc_component *component, unsigned int reg,
157 unsigned int value)
158{
159 struct cx20442_priv *cx20442 = snd_soc_component_get_drvdata(component);
160 int vls, vsp, old, len;
161 char buf[18];
162
163 if (reg >= 1)
164 return -EINVAL;
165
166
167
168 if (!cx20442->tty || !cx20442->tty->ops->write)
169 return -EIO;
170
171 old = cx20442->reg_cache;
172 cx20442->reg_cache = 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(component->dev, "%s: %s\n", __func__, buf);
197 if (cx20442->tty->ops->write(cx20442->tty, buf, len) != len)
198 return -EIO;
199
200 return 0;
201}
202
203
204
205
206
207
208
209
210
211
212
213static const char *v253_init = "ate0m0q0+fclass=8\r";
214
215
216static int v253_open(struct tty_struct *tty)
217{
218 int ret, len = strlen(v253_init);
219
220
221 if (!tty->ops->write)
222 return -EINVAL;
223
224
225 if (!tty->disc_data)
226 return -ENODEV;
227
228 tty->receive_room = 16;
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_component *component = tty->disc_data;
244 struct cx20442_priv *cx20442;
245
246 tty->disc_data = NULL;
247
248 if (!component)
249 return;
250
251 cx20442 = snd_soc_component_get_drvdata(component);
252
253
254 cx20442->tty = NULL;
255 component->card->pop_time = 0;
256}
257
258
259static int v253_hangup(struct tty_struct *tty)
260{
261 v253_close(tty);
262 return 0;
263}
264
265
266static void v253_receive(struct tty_struct *tty,
267 const unsigned char *cp, char *fp, int count)
268{
269 struct snd_soc_component *component = tty->disc_data;
270 struct cx20442_priv *cx20442;
271
272 if (!component)
273 return;
274
275 cx20442 = snd_soc_component_get_drvdata(component);
276
277 if (!cx20442->tty) {
278
279
280
281 cx20442->tty = tty;
282 component->card->pop_time = 1;
283 }
284}
285
286
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
306
307
308static struct snd_soc_dai_driver cx20442_dai = {
309 .name = "cx20442-voice",
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};
325
326static int cx20442_set_bias_level(struct snd_soc_component *component,
327 enum snd_soc_bias_level level)
328{
329 struct cx20442_priv *cx20442 = snd_soc_component_get_drvdata(component);
330 int err = 0;
331
332 switch (level) {
333 case SND_SOC_BIAS_PREPARE:
334 if (snd_soc_component_get_bias_level(component) != SND_SOC_BIAS_STANDBY)
335 break;
336 if (IS_ERR(cx20442->por))
337 err = PTR_ERR(cx20442->por);
338 else
339 err = regulator_enable(cx20442->por);
340 break;
341 case SND_SOC_BIAS_STANDBY:
342 if (snd_soc_component_get_bias_level(component) != SND_SOC_BIAS_PREPARE)
343 break;
344 if (IS_ERR(cx20442->por))
345 err = PTR_ERR(cx20442->por);
346 else
347 err = regulator_disable(cx20442->por);
348 break;
349 default:
350 break;
351 }
352
353 return err;
354}
355
356static int cx20442_component_probe(struct snd_soc_component *component)
357{
358 struct cx20442_priv *cx20442;
359
360 cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL);
361 if (cx20442 == NULL)
362 return -ENOMEM;
363
364 cx20442->por = regulator_get(component->dev, "POR");
365 if (IS_ERR(cx20442->por))
366 dev_warn(component->dev, "failed to get the regulator");
367 cx20442->tty = NULL;
368
369 snd_soc_component_set_drvdata(component, cx20442);
370 component->card->pop_time = 0;
371
372 return 0;
373}
374
375
376static void cx20442_component_remove(struct snd_soc_component *component)
377{
378 struct cx20442_priv *cx20442 = snd_soc_component_get_drvdata(component);
379
380 if (cx20442->tty) {
381 struct tty_struct *tty = cx20442->tty;
382 tty_hangup(tty);
383 }
384
385 if (!IS_ERR(cx20442->por)) {
386
387 regulator_put(cx20442->por);
388 }
389
390 snd_soc_component_set_drvdata(component, NULL);
391 kfree(cx20442);
392}
393
394static const struct snd_soc_component_driver cx20442_component_dev = {
395 .probe = cx20442_component_probe,
396 .remove = cx20442_component_remove,
397 .set_bias_level = cx20442_set_bias_level,
398 .read = cx20442_read_reg_cache,
399 .write = cx20442_write,
400 .dapm_widgets = cx20442_dapm_widgets,
401 .num_dapm_widgets = ARRAY_SIZE(cx20442_dapm_widgets),
402 .dapm_routes = cx20442_audio_map,
403 .num_dapm_routes = ARRAY_SIZE(cx20442_audio_map),
404 .idle_bias_on = 1,
405 .use_pmdown_time = 1,
406 .endianness = 1,
407 .non_legacy_dai_naming = 1,
408};
409
410static int cx20442_platform_probe(struct platform_device *pdev)
411{
412 return devm_snd_soc_register_component(&pdev->dev,
413 &cx20442_component_dev, &cx20442_dai, 1);
414}
415
416static struct platform_driver cx20442_platform_driver = {
417 .driver = {
418 .name = "cx20442-codec",
419 },
420 .probe = cx20442_platform_probe,
421};
422
423module_platform_driver(cx20442_platform_driver);
424
425MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver");
426MODULE_AUTHOR("Janusz Krzysztofik");
427MODULE_LICENSE("GPL");
428MODULE_ALIAS("platform:cx20442-codec");
429
