Commit | Line | Data |
---|---|---|
459dc352 JK |
1 | /* |
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 | ||
ad120dae JK |
16 | #include <linux/tty.h> |
17 | ||
459dc352 JK |
18 | #include <sound/core.h> |
19 | #include <sound/initval.h> | |
20 | #include <sound/soc-dapm.h> | |
21 | ||
22 | #include "cx20442.h" | |
23 | ||
24 | ||
25 | struct 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 | ||
38 | static 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 | ||
64 | static 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 | ||
88 | static 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 | ||
459dc352 JK |
96 | return 0; |
97 | } | |
98 | ||
99 | static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec, | |
100 | unsigned int reg) | |
101 | { | |
102 | u8 *reg_cache = codec->reg_cache; | |
103 | ||
104 | if (reg >= codec->reg_cache_size) | |
105 | return -EINVAL; | |
106 | ||
107 | return reg_cache[reg]; | |
108 | } | |
109 | ||
110 | enum v253_vls { | |
111 | V253_VLS_NONE = 0, | |
112 | V253_VLS_T, | |
113 | V253_VLS_L, | |
114 | V253_VLS_LT, | |
115 | V253_VLS_S, | |
116 | V253_VLS_ST, | |
117 | V253_VLS_M, | |
118 | V253_VLS_MST, | |
119 | V253_VLS_S1, | |
120 | V253_VLS_S1T, | |
121 | V253_VLS_MS1T, | |
122 | V253_VLS_M1, | |
123 | V253_VLS_M1ST, | |
124 | V253_VLS_M1S1T, | |
125 | V253_VLS_H, | |
126 | V253_VLS_HT, | |
127 | V253_VLS_MS, | |
128 | V253_VLS_MS1, | |
129 | V253_VLS_M1S, | |
130 | V253_VLS_M1S1, | |
131 | V253_VLS_TEST, | |
132 | }; | |
133 | ||
134 | static int cx20442_pm_to_v253_vls(u8 value) | |
135 | { | |
b84eab08 | 136 | switch (value & ~(1 << CX20442_AGC)) { |
459dc352 JK |
137 | case 0: |
138 | return V253_VLS_T; | |
139 | case (1 << CX20442_SPKOUT): | |
459dc352 | 140 | case (1 << CX20442_MIC): |
459dc352 JK |
141 | case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC): |
142 | return V253_VLS_M1S1; | |
143 | case (1 << CX20442_TELOUT): | |
144 | case (1 << CX20442_TELIN): | |
145 | case (1 << CX20442_TELOUT) | (1 << CX20442_TELIN): | |
146 | return V253_VLS_L; | |
147 | case (1 << CX20442_TELOUT) | (1 << CX20442_MIC): | |
148 | return V253_VLS_NONE; | |
149 | } | |
150 | return -EINVAL; | |
151 | } | |
152 | static int cx20442_pm_to_v253_vsp(u8 value) | |
153 | { | |
b84eab08 | 154 | switch (value & ~(1 << CX20442_AGC)) { |
459dc352 JK |
155 | case (1 << CX20442_SPKOUT): |
156 | case (1 << CX20442_MIC): | |
157 | case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC): | |
158 | return (bool)(value & (1 << CX20442_AGC)); | |
159 | } | |
160 | return (value & (1 << CX20442_AGC)) ? -EINVAL : 0; | |
161 | } | |
162 | ||
163 | static int cx20442_write(struct snd_soc_codec *codec, unsigned int reg, | |
164 | unsigned int value) | |
165 | { | |
166 | u8 *reg_cache = codec->reg_cache; | |
167 | int vls, vsp, old, len; | |
168 | char buf[18]; | |
169 | ||
170 | if (reg >= codec->reg_cache_size) | |
171 | return -EINVAL; | |
172 | ||
b84eab08 | 173 | /* hw_write and control_data pointers required for talking to the modem |
ad120dae | 174 | * are expected to be set by the line discipline initialization code */ |
459dc352 JK |
175 | if (!codec->hw_write || !codec->control_data) |
176 | return -EIO; | |
177 | ||
178 | old = reg_cache[reg]; | |
179 | reg_cache[reg] = value; | |
180 | ||
181 | vls = cx20442_pm_to_v253_vls(value); | |
182 | if (vls < 0) | |
183 | return vls; | |
184 | ||
185 | vsp = cx20442_pm_to_v253_vsp(value); | |
b84eab08 | 186 | if (vsp < 0) |
459dc352 JK |
187 | return vsp; |
188 | ||
189 | if ((vls == V253_VLS_T) || | |
190 | (vls == cx20442_pm_to_v253_vls(old))) { | |
191 | if (vsp == cx20442_pm_to_v253_vsp(old)) | |
192 | return 0; | |
193 | len = snprintf(buf, ARRAY_SIZE(buf), "at+vsp=%d\r", vsp); | |
194 | } else if (vsp == cx20442_pm_to_v253_vsp(old)) | |
195 | len = snprintf(buf, ARRAY_SIZE(buf), "at+vls=%d\r", vls); | |
196 | else | |
197 | len = snprintf(buf, ARRAY_SIZE(buf), | |
198 | "at+vls=%d;+vsp=%d\r", vls, vsp); | |
199 | ||
200 | if (unlikely(len > (ARRAY_SIZE(buf) - 1))) | |
201 | return -ENOMEM; | |
202 | ||
4977b03e | 203 | dev_dbg(codec->dev, "%s: %s\n", __func__, buf); |
459dc352 JK |
204 | if (codec->hw_write(codec->control_data, buf, len) != len) |
205 | return -EIO; | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
ad120dae JK |
210 | |
211 | /* Moved up here as line discipline referres it during initialization */ | |
212 | static struct snd_soc_codec *cx20442_codec; | |
213 | ||
214 | ||
215 | /* | |
216 | * Line discpline related code | |
217 | * | |
218 | * Any of the callback functions below can be used in two ways: | |
219 | * 1) registerd by a machine driver as one of line discipline operations, | |
220 | * 2) called from a machine's provided line discipline callback function | |
221 | * in case when extra machine specific code must be run as well. | |
222 | */ | |
223 | ||
224 | /* Modem init: echo off, digital speaker off, quiet off, voice mode */ | |
225 | static const char *v253_init = "ate0m0q0+fclass=8\r"; | |
226 | ||
227 | /* Line discipline .open() */ | |
228 | static int v253_open(struct tty_struct *tty) | |
229 | { | |
230 | struct snd_soc_codec *codec = cx20442_codec; | |
231 | int ret, len = strlen(v253_init); | |
232 | ||
233 | /* Doesn't make sense without write callback */ | |
234 | if (!tty->ops->write) | |
235 | return -EINVAL; | |
236 | ||
237 | /* Pass the codec structure address for use by other ldisc callbacks */ | |
238 | tty->disc_data = codec; | |
239 | ||
240 | if (tty->ops->write(tty, v253_init, len) != len) { | |
241 | ret = -EIO; | |
242 | goto err; | |
243 | } | |
244 | /* Actual setup will be performed after the modem responds. */ | |
245 | return 0; | |
246 | err: | |
247 | tty->disc_data = NULL; | |
248 | return ret; | |
249 | } | |
250 | ||
251 | /* Line discipline .close() */ | |
252 | static void v253_close(struct tty_struct *tty) | |
253 | { | |
254 | struct snd_soc_codec *codec = tty->disc_data; | |
255 | ||
256 | tty->disc_data = NULL; | |
257 | ||
258 | if (!codec) | |
259 | return; | |
260 | ||
261 | /* Prevent the codec driver from further accessing the modem */ | |
262 | codec->hw_write = NULL; | |
263 | codec->control_data = NULL; | |
264 | codec->pop_time = 0; | |
265 | } | |
266 | ||
267 | /* Line discipline .hangup() */ | |
268 | static int v253_hangup(struct tty_struct *tty) | |
269 | { | |
270 | v253_close(tty); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | /* Line discipline .receive_buf() */ | |
275 | static void v253_receive(struct tty_struct *tty, | |
276 | const unsigned char *cp, char *fp, int count) | |
277 | { | |
278 | struct snd_soc_codec *codec = tty->disc_data; | |
279 | ||
280 | if (!codec) | |
281 | return; | |
282 | ||
283 | if (!codec->control_data) { | |
284 | /* First modem response, complete setup procedure */ | |
285 | ||
286 | /* Set up codec driver access to modem controls */ | |
287 | codec->control_data = tty; | |
288 | codec->hw_write = (hw_write_t)tty->ops->write; | |
289 | codec->pop_time = 1; | |
290 | } | |
291 | } | |
292 | ||
293 | /* Line discipline .write_wakeup() */ | |
294 | static void v253_wakeup(struct tty_struct *tty) | |
295 | { | |
296 | } | |
297 | ||
298 | struct tty_ldisc_ops v253_ops = { | |
299 | .magic = TTY_LDISC_MAGIC, | |
300 | .name = "cx20442", | |
301 | .owner = THIS_MODULE, | |
302 | .open = v253_open, | |
303 | .close = v253_close, | |
304 | .hangup = v253_hangup, | |
305 | .receive_buf = v253_receive, | |
306 | .write_wakeup = v253_wakeup, | |
307 | }; | |
308 | EXPORT_SYMBOL_GPL(v253_ops); | |
309 | ||
310 | ||
311 | /* | |
312 | * Codec DAI | |
313 | */ | |
314 | ||
459dc352 JK |
315 | struct snd_soc_dai cx20442_dai = { |
316 | .name = "CX20442", | |
317 | .playback = { | |
318 | .stream_name = "Playback", | |
319 | .channels_min = 1, | |
320 | .channels_max = 1, | |
321 | .rates = SNDRV_PCM_RATE_8000, | |
322 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
323 | }, | |
324 | .capture = { | |
325 | .stream_name = "Capture", | |
326 | .channels_min = 1, | |
327 | .channels_max = 1, | |
328 | .rates = SNDRV_PCM_RATE_8000, | |
329 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
330 | }, | |
331 | }; | |
332 | EXPORT_SYMBOL_GPL(cx20442_dai); | |
333 | ||
459dc352 JK |
334 | static int cx20442_codec_probe(struct platform_device *pdev) |
335 | { | |
336 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
337 | struct snd_soc_codec *codec; | |
338 | int ret; | |
339 | ||
b84eab08 | 340 | if (!cx20442_codec) { |
459dc352 JK |
341 | dev_err(&pdev->dev, "cx20442 not yet discovered\n"); |
342 | return -ENODEV; | |
343 | } | |
344 | codec = cx20442_codec; | |
345 | ||
346 | socdev->card->codec = codec; | |
347 | ||
348 | /* register pcms */ | |
349 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
350 | if (ret < 0) { | |
351 | dev_err(&pdev->dev, "failed to create pcms\n"); | |
352 | goto pcm_err; | |
353 | } | |
354 | ||
355 | cx20442_add_widgets(codec); | |
356 | ||
459dc352 JK |
357 | pcm_err: |
358 | return ret; | |
359 | } | |
360 | ||
361 | /* power down chip */ | |
362 | static int cx20442_codec_remove(struct platform_device *pdev) | |
363 | { | |
364 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
365 | ||
366 | snd_soc_free_pcms(socdev); | |
367 | snd_soc_dapm_free(socdev); | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | struct snd_soc_codec_device cx20442_codec_dev = { | |
373 | .probe = cx20442_codec_probe, | |
374 | .remove = cx20442_codec_remove, | |
375 | }; | |
376 | EXPORT_SYMBOL_GPL(cx20442_codec_dev); | |
377 | ||
378 | static int cx20442_register(struct cx20442_priv *cx20442) | |
379 | { | |
380 | struct snd_soc_codec *codec = &cx20442->codec; | |
381 | int ret; | |
382 | ||
383 | mutex_init(&codec->mutex); | |
384 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
385 | INIT_LIST_HEAD(&codec->dapm_paths); | |
386 | ||
387 | codec->name = "CX20442"; | |
388 | codec->owner = THIS_MODULE; | |
389 | codec->private_data = cx20442; | |
390 | ||
391 | codec->dai = &cx20442_dai; | |
392 | codec->num_dai = 1; | |
393 | ||
394 | codec->reg_cache = &cx20442->reg_cache; | |
395 | codec->reg_cache_size = ARRAY_SIZE(cx20442->reg_cache); | |
396 | codec->read = cx20442_read_reg_cache; | |
397 | codec->write = cx20442_write; | |
398 | ||
399 | codec->bias_level = SND_SOC_BIAS_OFF; | |
400 | ||
401 | cx20442_dai.dev = codec->dev; | |
402 | ||
403 | cx20442_codec = codec; | |
404 | ||
405 | ret = snd_soc_register_codec(codec); | |
406 | if (ret != 0) { | |
ad120dae | 407 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); |
459dc352 JK |
408 | goto err; |
409 | } | |
410 | ||
411 | ret = snd_soc_register_dai(&cx20442_dai); | |
412 | if (ret != 0) { | |
ad120dae | 413 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); |
459dc352 JK |
414 | goto err_codec; |
415 | } | |
416 | ||
417 | return 0; | |
418 | ||
419 | err_codec: | |
420 | snd_soc_unregister_codec(codec); | |
421 | err: | |
422 | cx20442_codec = NULL; | |
423 | kfree(cx20442); | |
424 | return ret; | |
425 | } | |
426 | ||
427 | static void cx20442_unregister(struct cx20442_priv *cx20442) | |
428 | { | |
429 | snd_soc_unregister_dai(&cx20442_dai); | |
430 | snd_soc_unregister_codec(&cx20442->codec); | |
431 | ||
432 | cx20442_codec = NULL; | |
433 | kfree(cx20442); | |
434 | } | |
435 | ||
436 | static int cx20442_platform_probe(struct platform_device *pdev) | |
437 | { | |
438 | struct cx20442_priv *cx20442; | |
439 | struct snd_soc_codec *codec; | |
440 | ||
441 | cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL); | |
442 | if (cx20442 == NULL) | |
443 | return -ENOMEM; | |
444 | ||
445 | codec = &cx20442->codec; | |
446 | ||
447 | codec->control_data = NULL; | |
448 | codec->hw_write = NULL; | |
449 | codec->pop_time = 0; | |
450 | ||
451 | codec->dev = &pdev->dev; | |
452 | platform_set_drvdata(pdev, cx20442); | |
453 | ||
454 | return cx20442_register(cx20442); | |
455 | } | |
456 | ||
457 | static int __exit cx20442_platform_remove(struct platform_device *pdev) | |
458 | { | |
459 | struct cx20442_priv *cx20442 = platform_get_drvdata(pdev); | |
460 | ||
461 | cx20442_unregister(cx20442); | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static struct platform_driver cx20442_platform_driver = { | |
466 | .driver = { | |
467 | .name = "cx20442", | |
468 | .owner = THIS_MODULE, | |
469 | }, | |
470 | .probe = cx20442_platform_probe, | |
471 | .remove = __exit_p(cx20442_platform_remove), | |
472 | }; | |
473 | ||
474 | static int __init cx20442_init(void) | |
475 | { | |
476 | return platform_driver_register(&cx20442_platform_driver); | |
477 | } | |
478 | module_init(cx20442_init); | |
479 | ||
480 | static void __exit cx20442_exit(void) | |
481 | { | |
482 | platform_driver_unregister(&cx20442_platform_driver); | |
483 | } | |
484 | module_exit(cx20442_exit); | |
485 | ||
486 | MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver"); | |
487 | MODULE_AUTHOR("Janusz Krzysztofik"); | |
488 | MODULE_LICENSE("GPL"); | |
b84eab08 | 489 | MODULE_ALIAS("platform:cx20442"); |