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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 | ||
16 | #include <sound/core.h> | |
17 | #include <sound/initval.h> | |
18 | #include <sound/soc-dapm.h> | |
19 | ||
20 | #include "cx20442.h" | |
21 | ||
22 | ||
23 | struct cx20442_priv { | |
24 | struct snd_soc_codec codec; | |
25 | u8 reg_cache[1]; | |
26 | }; | |
27 | ||
28 | #define CX20442_PM 0x0 | |
29 | ||
30 | #define CX20442_TELIN 0 | |
31 | #define CX20442_TELOUT 1 | |
32 | #define CX20442_MIC 2 | |
33 | #define CX20442_SPKOUT 3 | |
34 | #define CX20442_AGC 4 | |
35 | ||
36 | static const struct snd_soc_dapm_widget cx20442_dapm_widgets[] = { | |
37 | SND_SOC_DAPM_OUTPUT("TELOUT"), | |
38 | SND_SOC_DAPM_OUTPUT("SPKOUT"), | |
39 | SND_SOC_DAPM_OUTPUT("AGCOUT"), | |
40 | ||
41 | SND_SOC_DAPM_MIXER("SPKOUT Mixer", SND_SOC_NOPM, 0, 0, NULL, 0), | |
42 | ||
43 | SND_SOC_DAPM_PGA("TELOUT Amp", CX20442_PM, CX20442_TELOUT, 0, NULL, 0), | |
44 | SND_SOC_DAPM_PGA("SPKOUT Amp", CX20442_PM, CX20442_SPKOUT, 0, NULL, 0), | |
45 | SND_SOC_DAPM_PGA("SPKOUT AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0), | |
46 | ||
47 | SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), | |
48 | SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), | |
49 | ||
50 | SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0), | |
51 | ||
52 | SND_SOC_DAPM_MICBIAS("TELIN Bias", CX20442_PM, CX20442_TELIN, 0), | |
53 | SND_SOC_DAPM_MICBIAS("MIC Bias", CX20442_PM, CX20442_MIC, 0), | |
54 | ||
55 | SND_SOC_DAPM_PGA("MIC AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0), | |
56 | ||
57 | SND_SOC_DAPM_INPUT("TELIN"), | |
58 | SND_SOC_DAPM_INPUT("MIC"), | |
59 | SND_SOC_DAPM_INPUT("AGCIN"), | |
60 | }; | |
61 | ||
62 | static const struct snd_soc_dapm_route cx20442_audio_map[] = { | |
63 | {"TELOUT", NULL, "TELOUT Amp"}, | |
64 | ||
65 | {"SPKOUT", NULL, "SPKOUT Mixer"}, | |
66 | {"SPKOUT Mixer", NULL, "SPKOUT Amp"}, | |
67 | ||
68 | {"TELOUT Amp", NULL, "DAC"}, | |
69 | {"SPKOUT Amp", NULL, "DAC"}, | |
70 | ||
71 | {"SPKOUT Mixer", NULL, "SPKOUT AGC"}, | |
72 | {"SPKOUT AGC", NULL, "AGCIN"}, | |
73 | ||
74 | {"AGCOUT", NULL, "MIC AGC"}, | |
75 | {"MIC AGC", NULL, "MIC"}, | |
76 | ||
77 | {"MIC Bias", NULL, "MIC"}, | |
78 | {"Input Mixer", NULL, "MIC Bias"}, | |
79 | ||
80 | {"TELIN Bias", NULL, "TELIN"}, | |
81 | {"Input Mixer", NULL, "TELIN Bias"}, | |
82 | ||
83 | {"ADC", NULL, "Input Mixer"}, | |
84 | }; | |
85 | ||
86 | static int cx20442_add_widgets(struct snd_soc_codec *codec) | |
87 | { | |
88 | snd_soc_dapm_new_controls(codec, cx20442_dapm_widgets, | |
89 | ARRAY_SIZE(cx20442_dapm_widgets)); | |
90 | ||
91 | snd_soc_dapm_add_routes(codec, cx20442_audio_map, | |
92 | ARRAY_SIZE(cx20442_audio_map)); | |
93 | ||
94 | snd_soc_dapm_new_widgets(codec); | |
95 | return 0; | |
96 | } | |
97 | ||
98 | static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec, | |
99 | unsigned int reg) | |
100 | { | |
101 | u8 *reg_cache = codec->reg_cache; | |
102 | ||
103 | if (reg >= codec->reg_cache_size) | |
104 | return -EINVAL; | |
105 | ||
106 | return reg_cache[reg]; | |
107 | } | |
108 | ||
109 | enum v253_vls { | |
110 | V253_VLS_NONE = 0, | |
111 | V253_VLS_T, | |
112 | V253_VLS_L, | |
113 | V253_VLS_LT, | |
114 | V253_VLS_S, | |
115 | V253_VLS_ST, | |
116 | V253_VLS_M, | |
117 | V253_VLS_MST, | |
118 | V253_VLS_S1, | |
119 | V253_VLS_S1T, | |
120 | V253_VLS_MS1T, | |
121 | V253_VLS_M1, | |
122 | V253_VLS_M1ST, | |
123 | V253_VLS_M1S1T, | |
124 | V253_VLS_H, | |
125 | V253_VLS_HT, | |
126 | V253_VLS_MS, | |
127 | V253_VLS_MS1, | |
128 | V253_VLS_M1S, | |
129 | V253_VLS_M1S1, | |
130 | V253_VLS_TEST, | |
131 | }; | |
132 | ||
133 | static int cx20442_pm_to_v253_vls(u8 value) | |
134 | { | |
b84eab08 | 135 | switch (value & ~(1 << CX20442_AGC)) { |
459dc352 JK |
136 | case 0: |
137 | return V253_VLS_T; | |
138 | case (1 << CX20442_SPKOUT): | |
139 | return V253_VLS_S1; | |
140 | case (1 << CX20442_MIC): | |
141 | return V253_VLS_M1; | |
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 | } | |
153 | static int cx20442_pm_to_v253_vsp(u8 value) | |
154 | { | |
b84eab08 | 155 | switch (value & ~(1 << CX20442_AGC)) { |
459dc352 JK |
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 | ||
164 | static 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 | ||
b84eab08 JK |
174 | /* hw_write and control_data pointers required for talking to the modem |
175 | * are expected to be set by the machine driver's line discipline | |
176 | * initialization code */ | |
459dc352 JK |
177 | if (!codec->hw_write || !codec->control_data) |
178 | return -EIO; | |
179 | ||
180 | old = reg_cache[reg]; | |
181 | reg_cache[reg] = value; | |
182 | ||
183 | vls = cx20442_pm_to_v253_vls(value); | |
184 | if (vls < 0) | |
185 | return vls; | |
186 | ||
187 | vsp = cx20442_pm_to_v253_vsp(value); | |
b84eab08 | 188 | if (vsp < 0) |
459dc352 JK |
189 | return vsp; |
190 | ||
191 | if ((vls == V253_VLS_T) || | |
192 | (vls == cx20442_pm_to_v253_vls(old))) { | |
193 | if (vsp == cx20442_pm_to_v253_vsp(old)) | |
194 | return 0; | |
195 | len = snprintf(buf, ARRAY_SIZE(buf), "at+vsp=%d\r", vsp); | |
196 | } else if (vsp == cx20442_pm_to_v253_vsp(old)) | |
197 | len = snprintf(buf, ARRAY_SIZE(buf), "at+vls=%d\r", vls); | |
198 | else | |
199 | len = snprintf(buf, ARRAY_SIZE(buf), | |
200 | "at+vls=%d;+vsp=%d\r", vls, vsp); | |
201 | ||
202 | if (unlikely(len > (ARRAY_SIZE(buf) - 1))) | |
203 | return -ENOMEM; | |
204 | ||
205 | if (codec->hw_write(codec->control_data, buf, len) != len) | |
206 | return -EIO; | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
211 | struct snd_soc_dai cx20442_dai = { | |
212 | .name = "CX20442", | |
213 | .playback = { | |
214 | .stream_name = "Playback", | |
215 | .channels_min = 1, | |
216 | .channels_max = 1, | |
217 | .rates = SNDRV_PCM_RATE_8000, | |
218 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
219 | }, | |
220 | .capture = { | |
221 | .stream_name = "Capture", | |
222 | .channels_min = 1, | |
223 | .channels_max = 1, | |
224 | .rates = SNDRV_PCM_RATE_8000, | |
225 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
226 | }, | |
227 | }; | |
228 | EXPORT_SYMBOL_GPL(cx20442_dai); | |
229 | ||
230 | static struct snd_soc_codec *cx20442_codec; | |
231 | ||
232 | static int cx20442_codec_probe(struct platform_device *pdev) | |
233 | { | |
234 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
235 | struct snd_soc_codec *codec; | |
236 | int ret; | |
237 | ||
b84eab08 | 238 | if (!cx20442_codec) { |
459dc352 JK |
239 | dev_err(&pdev->dev, "cx20442 not yet discovered\n"); |
240 | return -ENODEV; | |
241 | } | |
242 | codec = cx20442_codec; | |
243 | ||
244 | socdev->card->codec = codec; | |
245 | ||
246 | /* register pcms */ | |
247 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
248 | if (ret < 0) { | |
249 | dev_err(&pdev->dev, "failed to create pcms\n"); | |
250 | goto pcm_err; | |
251 | } | |
252 | ||
253 | cx20442_add_widgets(codec); | |
254 | ||
255 | ret = snd_soc_init_card(socdev); | |
256 | if (ret < 0) { | |
257 | dev_err(&pdev->dev, "failed to register card\n"); | |
258 | goto card_err; | |
259 | } | |
260 | ||
261 | return ret; | |
262 | ||
263 | card_err: | |
264 | snd_soc_free_pcms(socdev); | |
265 | snd_soc_dapm_free(socdev); | |
266 | pcm_err: | |
267 | return ret; | |
268 | } | |
269 | ||
270 | /* power down chip */ | |
271 | static int cx20442_codec_remove(struct platform_device *pdev) | |
272 | { | |
273 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
274 | ||
275 | snd_soc_free_pcms(socdev); | |
276 | snd_soc_dapm_free(socdev); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | struct snd_soc_codec_device cx20442_codec_dev = { | |
282 | .probe = cx20442_codec_probe, | |
283 | .remove = cx20442_codec_remove, | |
284 | }; | |
285 | EXPORT_SYMBOL_GPL(cx20442_codec_dev); | |
286 | ||
287 | static int cx20442_register(struct cx20442_priv *cx20442) | |
288 | { | |
289 | struct snd_soc_codec *codec = &cx20442->codec; | |
290 | int ret; | |
291 | ||
292 | mutex_init(&codec->mutex); | |
293 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
294 | INIT_LIST_HEAD(&codec->dapm_paths); | |
295 | ||
296 | codec->name = "CX20442"; | |
297 | codec->owner = THIS_MODULE; | |
298 | codec->private_data = cx20442; | |
299 | ||
300 | codec->dai = &cx20442_dai; | |
301 | codec->num_dai = 1; | |
302 | ||
303 | codec->reg_cache = &cx20442->reg_cache; | |
304 | codec->reg_cache_size = ARRAY_SIZE(cx20442->reg_cache); | |
305 | codec->read = cx20442_read_reg_cache; | |
306 | codec->write = cx20442_write; | |
307 | ||
308 | codec->bias_level = SND_SOC_BIAS_OFF; | |
309 | ||
310 | cx20442_dai.dev = codec->dev; | |
311 | ||
312 | cx20442_codec = codec; | |
313 | ||
314 | ret = snd_soc_register_codec(codec); | |
315 | if (ret != 0) { | |
b84eab08 | 316 | dev_err(&codec->dev, "Failed to register codec: %d\n", ret); |
459dc352 JK |
317 | goto err; |
318 | } | |
319 | ||
320 | ret = snd_soc_register_dai(&cx20442_dai); | |
321 | if (ret != 0) { | |
b84eab08 | 322 | dev_err(&codec->dev, "Failed to register DAI: %d\n", ret); |
459dc352 JK |
323 | goto err_codec; |
324 | } | |
325 | ||
326 | return 0; | |
327 | ||
328 | err_codec: | |
329 | snd_soc_unregister_codec(codec); | |
330 | err: | |
331 | cx20442_codec = NULL; | |
332 | kfree(cx20442); | |
333 | return ret; | |
334 | } | |
335 | ||
336 | static void cx20442_unregister(struct cx20442_priv *cx20442) | |
337 | { | |
338 | snd_soc_unregister_dai(&cx20442_dai); | |
339 | snd_soc_unregister_codec(&cx20442->codec); | |
340 | ||
341 | cx20442_codec = NULL; | |
342 | kfree(cx20442); | |
343 | } | |
344 | ||
345 | static int cx20442_platform_probe(struct platform_device *pdev) | |
346 | { | |
347 | struct cx20442_priv *cx20442; | |
348 | struct snd_soc_codec *codec; | |
349 | ||
350 | cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL); | |
351 | if (cx20442 == NULL) | |
352 | return -ENOMEM; | |
353 | ||
354 | codec = &cx20442->codec; | |
355 | ||
356 | codec->control_data = NULL; | |
357 | codec->hw_write = NULL; | |
358 | codec->pop_time = 0; | |
359 | ||
360 | codec->dev = &pdev->dev; | |
361 | platform_set_drvdata(pdev, cx20442); | |
362 | ||
363 | return cx20442_register(cx20442); | |
364 | } | |
365 | ||
366 | static int __exit cx20442_platform_remove(struct platform_device *pdev) | |
367 | { | |
368 | struct cx20442_priv *cx20442 = platform_get_drvdata(pdev); | |
369 | ||
370 | cx20442_unregister(cx20442); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static struct platform_driver cx20442_platform_driver = { | |
375 | .driver = { | |
376 | .name = "cx20442", | |
377 | .owner = THIS_MODULE, | |
378 | }, | |
379 | .probe = cx20442_platform_probe, | |
380 | .remove = __exit_p(cx20442_platform_remove), | |
381 | }; | |
382 | ||
383 | static int __init cx20442_init(void) | |
384 | { | |
385 | return platform_driver_register(&cx20442_platform_driver); | |
386 | } | |
387 | module_init(cx20442_init); | |
388 | ||
389 | static void __exit cx20442_exit(void) | |
390 | { | |
391 | platform_driver_unregister(&cx20442_platform_driver); | |
392 | } | |
393 | module_exit(cx20442_exit); | |
394 | ||
395 | MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver"); | |
396 | MODULE_AUTHOR("Janusz Krzysztofik"); | |
397 | MODULE_LICENSE("GPL"); | |
b84eab08 | 398 | MODULE_ALIAS("platform:cx20442"); |