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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 | 16 | #include <linux/tty.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
da155d5b | 18 | #include <linux/module.h> |
f75a8ff6 | 19 | #include <linux/regulator/consumer.h> |
ad120dae | 20 | |
459dc352 JK |
21 | #include <sound/core.h> |
22 | #include <sound/initval.h> | |
ce6120cc | 23 | #include <sound/soc.h> |
459dc352 JK |
24 | |
25 | #include "cx20442.h" | |
26 | ||
27 | ||
28 | struct cx20442_priv { | |
f0fba2ad | 29 | void *control_data; |
f75a8ff6 | 30 | struct regulator *por; |
459dc352 JK |
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 | ||
41 | static 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 | ||
67 | static 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 | ||
459dc352 JK |
91 | static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec, |
92 | unsigned int reg) | |
93 | { | |
94 | u8 *reg_cache = codec->reg_cache; | |
95 | ||
f0fba2ad | 96 | if (reg >= codec->driver->reg_cache_size) |
459dc352 JK |
97 | return -EINVAL; |
98 | ||
99 | return reg_cache[reg]; | |
100 | } | |
101 | ||
102 | enum 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 | ||
126 | static int cx20442_pm_to_v253_vls(u8 value) | |
127 | { | |
b84eab08 | 128 | switch (value & ~(1 << CX20442_AGC)) { |
459dc352 JK |
129 | case 0: |
130 | return V253_VLS_T; | |
131 | case (1 << CX20442_SPKOUT): | |
459dc352 | 132 | case (1 << CX20442_MIC): |
459dc352 JK |
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 | } | |
144 | static int cx20442_pm_to_v253_vsp(u8 value) | |
145 | { | |
b84eab08 | 146 | switch (value & ~(1 << CX20442_AGC)) { |
459dc352 JK |
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 | ||
155 | static int cx20442_write(struct snd_soc_codec *codec, unsigned int reg, | |
156 | unsigned int value) | |
157 | { | |
f0fba2ad | 158 | struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec); |
459dc352 JK |
159 | u8 *reg_cache = codec->reg_cache; |
160 | int vls, vsp, old, len; | |
161 | char buf[18]; | |
162 | ||
f0fba2ad | 163 | if (reg >= codec->driver->reg_cache_size) |
459dc352 JK |
164 | return -EINVAL; |
165 | ||
b84eab08 | 166 | /* hw_write and control_data pointers required for talking to the modem |
ad120dae | 167 | * are expected to be set by the line discipline initialization code */ |
f0fba2ad | 168 | if (!codec->hw_write || !cx20442->control_data) |
459dc352 JK |
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); | |
b84eab08 | 179 | if (vsp < 0) |
459dc352 JK |
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 | ||
4977b03e | 196 | dev_dbg(codec->dev, "%s: %s\n", __func__, buf); |
f0fba2ad | 197 | if (codec->hw_write(cx20442->control_data, buf, len) != len) |
459dc352 JK |
198 | return -EIO; |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
ad120dae | 203 | |
ad120dae JK |
204 | /* |
205 | * Line discpline related code | |
206 | * | |
207 | * Any of the callback functions below can be used in two ways: | |
208 | * 1) registerd by a machine driver as one of line discipline operations, | |
209 | * 2) called from a machine's provided line discipline callback function | |
210 | * in case when extra machine specific code must be run as well. | |
211 | */ | |
212 | ||
213 | /* Modem init: echo off, digital speaker off, quiet off, voice mode */ | |
214 | static const char *v253_init = "ate0m0q0+fclass=8\r"; | |
215 | ||
216 | /* Line discipline .open() */ | |
217 | static int v253_open(struct tty_struct *tty) | |
218 | { | |
ad120dae JK |
219 | int ret, len = strlen(v253_init); |
220 | ||
221 | /* Doesn't make sense without write callback */ | |
222 | if (!tty->ops->write) | |
223 | return -EINVAL; | |
224 | ||
f0fba2ad LG |
225 | /* Won't work if no codec pointer has been passed by a card driver */ |
226 | if (!tty->disc_data) | |
227 | return -ENODEV; | |
ad120dae JK |
228 | |
229 | if (tty->ops->write(tty, v253_init, len) != len) { | |
230 | ret = -EIO; | |
231 | goto err; | |
232 | } | |
233 | /* Actual setup will be performed after the modem responds. */ | |
234 | return 0; | |
235 | err: | |
236 | tty->disc_data = NULL; | |
237 | return ret; | |
238 | } | |
239 | ||
240 | /* Line discipline .close() */ | |
241 | static void v253_close(struct tty_struct *tty) | |
242 | { | |
243 | struct snd_soc_codec *codec = tty->disc_data; | |
f0fba2ad | 244 | struct cx20442_priv *cx20442; |
ad120dae JK |
245 | |
246 | tty->disc_data = NULL; | |
247 | ||
248 | if (!codec) | |
249 | return; | |
250 | ||
f0fba2ad LG |
251 | cx20442 = snd_soc_codec_get_drvdata(codec); |
252 | ||
ad120dae JK |
253 | /* Prevent the codec driver from further accessing the modem */ |
254 | codec->hw_write = NULL; | |
f0fba2ad | 255 | cx20442->control_data = NULL; |
00200107 | 256 | codec->component.card->pop_time = 0; |
ad120dae JK |
257 | } |
258 | ||
259 | /* Line discipline .hangup() */ | |
260 | static int v253_hangup(struct tty_struct *tty) | |
261 | { | |
262 | v253_close(tty); | |
263 | return 0; | |
264 | } | |
265 | ||
266 | /* Line discipline .receive_buf() */ | |
bb3d6bf1 LT |
267 | static void v253_receive(struct tty_struct *tty, |
268 | const unsigned char *cp, char *fp, int count) | |
ad120dae JK |
269 | { |
270 | struct snd_soc_codec *codec = tty->disc_data; | |
f0fba2ad | 271 | struct cx20442_priv *cx20442; |
ad120dae JK |
272 | |
273 | if (!codec) | |
bb3d6bf1 | 274 | return; |
ad120dae | 275 | |
f0fba2ad LG |
276 | cx20442 = snd_soc_codec_get_drvdata(codec); |
277 | ||
278 | if (!cx20442->control_data) { | |
ad120dae JK |
279 | /* First modem response, complete setup procedure */ |
280 | ||
281 | /* Set up codec driver access to modem controls */ | |
f0fba2ad | 282 | cx20442->control_data = tty; |
ad120dae | 283 | codec->hw_write = (hw_write_t)tty->ops->write; |
00200107 | 284 | codec->component.card->pop_time = 1; |
ad120dae JK |
285 | } |
286 | } | |
287 | ||
288 | /* Line discipline .write_wakeup() */ | |
289 | static void v253_wakeup(struct tty_struct *tty) | |
290 | { | |
291 | } | |
292 | ||
293 | struct 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 | }; | |
303 | EXPORT_SYMBOL_GPL(v253_ops); | |
304 | ||
305 | ||
306 | /* | |
307 | * Codec DAI | |
308 | */ | |
309 | ||
f0fba2ad | 310 | static struct snd_soc_dai_driver cx20442_dai = { |
5394637a | 311 | .name = "cx20442-voice", |
459dc352 JK |
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 | }; | |
459dc352 | 327 | |
f75a8ff6 JK |
328 | static 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 (codec->dapm.bias_level != 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 (codec->dapm.bias_level != 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 | if (!err) | |
355 | codec->dapm.bias_level = level; | |
356 | ||
357 | return err; | |
358 | } | |
359 | ||
f0fba2ad | 360 | static int cx20442_codec_probe(struct snd_soc_codec *codec) |
459dc352 | 361 | { |
f0fba2ad | 362 | struct cx20442_priv *cx20442; |
459dc352 | 363 | |
f0fba2ad LG |
364 | cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL); |
365 | if (cx20442 == NULL) | |
366 | return -ENOMEM; | |
459dc352 | 367 | |
f75a8ff6 JK |
368 | cx20442->por = regulator_get(codec->dev, "POR"); |
369 | if (IS_ERR(cx20442->por)) | |
370 | dev_warn(codec->dev, "failed to get the regulator"); | |
f0fba2ad | 371 | cx20442->control_data = NULL; |
f75a8ff6 JK |
372 | |
373 | snd_soc_codec_set_drvdata(codec, cx20442); | |
f0fba2ad | 374 | codec->hw_write = NULL; |
00200107 | 375 | codec->component.card->pop_time = 0; |
f0fba2ad LG |
376 | |
377 | return 0; | |
459dc352 JK |
378 | } |
379 | ||
380 | /* power down chip */ | |
f0fba2ad | 381 | static int cx20442_codec_remove(struct snd_soc_codec *codec) |
459dc352 | 382 | { |
f0fba2ad | 383 | struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec); |
459dc352 | 384 | |
f0fba2ad | 385 | if (cx20442->control_data) { |
aaed2a62 MB |
386 | struct tty_struct *tty = cx20442->control_data; |
387 | tty_hangup(tty); | |
f0fba2ad | 388 | } |
459dc352 | 389 | |
f75a8ff6 JK |
390 | if (!IS_ERR(cx20442->por)) { |
391 | /* should be already in STANDBY, hence disabled */ | |
392 | regulator_put(cx20442->por); | |
393 | } | |
394 | ||
395 | snd_soc_codec_set_drvdata(codec, NULL); | |
f0fba2ad | 396 | kfree(cx20442); |
459dc352 JK |
397 | return 0; |
398 | } | |
399 | ||
8e6bfb9b | 400 | static const u8 cx20442_reg; |
f019ee5f | 401 | |
f0fba2ad | 402 | static struct snd_soc_codec_driver cx20442_codec_dev = { |
459dc352 JK |
403 | .probe = cx20442_codec_probe, |
404 | .remove = cx20442_codec_remove, | |
f75a8ff6 | 405 | .set_bias_level = cx20442_set_bias_level, |
f019ee5f | 406 | .reg_cache_default = &cx20442_reg, |
f0fba2ad LG |
407 | .reg_cache_size = 1, |
408 | .reg_word_size = sizeof(u8), | |
409 | .read = cx20442_read_reg_cache, | |
410 | .write = cx20442_write, | |
51fb1a87 LG |
411 | .dapm_widgets = cx20442_dapm_widgets, |
412 | .num_dapm_widgets = ARRAY_SIZE(cx20442_dapm_widgets), | |
413 | .dapm_routes = cx20442_audio_map, | |
414 | .num_dapm_routes = ARRAY_SIZE(cx20442_audio_map), | |
459dc352 | 415 | }; |
459dc352 JK |
416 | |
417 | static int cx20442_platform_probe(struct platform_device *pdev) | |
418 | { | |
f0fba2ad LG |
419 | return snd_soc_register_codec(&pdev->dev, |
420 | &cx20442_codec_dev, &cx20442_dai, 1); | |
459dc352 JK |
421 | } |
422 | ||
423 | static int __exit cx20442_platform_remove(struct platform_device *pdev) | |
424 | { | |
f0fba2ad | 425 | snd_soc_unregister_codec(&pdev->dev); |
459dc352 JK |
426 | return 0; |
427 | } | |
428 | ||
429 | static struct platform_driver cx20442_platform_driver = { | |
430 | .driver = { | |
f0fba2ad | 431 | .name = "cx20442-codec", |
459dc352 JK |
432 | }, |
433 | .probe = cx20442_platform_probe, | |
434 | .remove = __exit_p(cx20442_platform_remove), | |
435 | }; | |
436 | ||
5bbcc3c0 | 437 | module_platform_driver(cx20442_platform_driver); |
459dc352 JK |
438 | |
439 | MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver"); | |
440 | MODULE_AUTHOR("Janusz Krzysztofik"); | |
441 | MODULE_LICENSE("GPL"); | |
f0fba2ad | 442 | MODULE_ALIAS("platform:cx20442-codec"); |