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 | 16 | #include <linux/tty.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
ad120dae | 18 | |
459dc352 JK |
19 | #include <sound/core.h> |
20 | #include <sound/initval.h> | |
ce6120cc | 21 | #include <sound/soc.h> |
459dc352 JK |
22 | |
23 | #include "cx20442.h" | |
24 | ||
25 | ||
26 | struct cx20442_priv { | |
f0fba2ad LG |
27 | enum snd_soc_control_type control_type; |
28 | void *control_data; | |
459dc352 JK |
29 | }; |
30 | ||
31 | #define CX20442_PM 0x0 | |
32 | ||
33 | #define CX20442_TELIN 0 | |
34 | #define CX20442_TELOUT 1 | |
35 | #define CX20442_MIC 2 | |
36 | #define CX20442_SPKOUT 3 | |
37 | #define CX20442_AGC 4 | |
38 | ||
39 | static const struct snd_soc_dapm_widget cx20442_dapm_widgets[] = { | |
40 | SND_SOC_DAPM_OUTPUT("TELOUT"), | |
41 | SND_SOC_DAPM_OUTPUT("SPKOUT"), | |
42 | SND_SOC_DAPM_OUTPUT("AGCOUT"), | |
43 | ||
44 | SND_SOC_DAPM_MIXER("SPKOUT Mixer", SND_SOC_NOPM, 0, 0, NULL, 0), | |
45 | ||
46 | SND_SOC_DAPM_PGA("TELOUT Amp", CX20442_PM, CX20442_TELOUT, 0, NULL, 0), | |
47 | SND_SOC_DAPM_PGA("SPKOUT Amp", CX20442_PM, CX20442_SPKOUT, 0, NULL, 0), | |
48 | SND_SOC_DAPM_PGA("SPKOUT AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0), | |
49 | ||
50 | SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), | |
51 | SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), | |
52 | ||
53 | SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0), | |
54 | ||
55 | SND_SOC_DAPM_MICBIAS("TELIN Bias", CX20442_PM, CX20442_TELIN, 0), | |
56 | SND_SOC_DAPM_MICBIAS("MIC Bias", CX20442_PM, CX20442_MIC, 0), | |
57 | ||
58 | SND_SOC_DAPM_PGA("MIC AGC", CX20442_PM, CX20442_AGC, 0, NULL, 0), | |
59 | ||
60 | SND_SOC_DAPM_INPUT("TELIN"), | |
61 | SND_SOC_DAPM_INPUT("MIC"), | |
62 | SND_SOC_DAPM_INPUT("AGCIN"), | |
63 | }; | |
64 | ||
65 | static const struct snd_soc_dapm_route cx20442_audio_map[] = { | |
66 | {"TELOUT", NULL, "TELOUT Amp"}, | |
67 | ||
68 | {"SPKOUT", NULL, "SPKOUT Mixer"}, | |
69 | {"SPKOUT Mixer", NULL, "SPKOUT Amp"}, | |
70 | ||
71 | {"TELOUT Amp", NULL, "DAC"}, | |
72 | {"SPKOUT Amp", NULL, "DAC"}, | |
73 | ||
74 | {"SPKOUT Mixer", NULL, "SPKOUT AGC"}, | |
75 | {"SPKOUT AGC", NULL, "AGCIN"}, | |
76 | ||
77 | {"AGCOUT", NULL, "MIC AGC"}, | |
78 | {"MIC AGC", NULL, "MIC"}, | |
79 | ||
80 | {"MIC Bias", NULL, "MIC"}, | |
81 | {"Input Mixer", NULL, "MIC Bias"}, | |
82 | ||
83 | {"TELIN Bias", NULL, "TELIN"}, | |
84 | {"Input Mixer", NULL, "TELIN Bias"}, | |
85 | ||
86 | {"ADC", NULL, "Input Mixer"}, | |
87 | }; | |
88 | ||
459dc352 JK |
89 | static unsigned int cx20442_read_reg_cache(struct snd_soc_codec *codec, |
90 | unsigned int reg) | |
91 | { | |
92 | u8 *reg_cache = codec->reg_cache; | |
93 | ||
f0fba2ad | 94 | if (reg >= codec->driver->reg_cache_size) |
459dc352 JK |
95 | return -EINVAL; |
96 | ||
97 | return reg_cache[reg]; | |
98 | } | |
99 | ||
100 | enum v253_vls { | |
101 | V253_VLS_NONE = 0, | |
102 | V253_VLS_T, | |
103 | V253_VLS_L, | |
104 | V253_VLS_LT, | |
105 | V253_VLS_S, | |
106 | V253_VLS_ST, | |
107 | V253_VLS_M, | |
108 | V253_VLS_MST, | |
109 | V253_VLS_S1, | |
110 | V253_VLS_S1T, | |
111 | V253_VLS_MS1T, | |
112 | V253_VLS_M1, | |
113 | V253_VLS_M1ST, | |
114 | V253_VLS_M1S1T, | |
115 | V253_VLS_H, | |
116 | V253_VLS_HT, | |
117 | V253_VLS_MS, | |
118 | V253_VLS_MS1, | |
119 | V253_VLS_M1S, | |
120 | V253_VLS_M1S1, | |
121 | V253_VLS_TEST, | |
122 | }; | |
123 | ||
124 | static int cx20442_pm_to_v253_vls(u8 value) | |
125 | { | |
b84eab08 | 126 | switch (value & ~(1 << CX20442_AGC)) { |
459dc352 JK |
127 | case 0: |
128 | return V253_VLS_T; | |
129 | case (1 << CX20442_SPKOUT): | |
459dc352 | 130 | case (1 << CX20442_MIC): |
459dc352 JK |
131 | case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC): |
132 | return V253_VLS_M1S1; | |
133 | case (1 << CX20442_TELOUT): | |
134 | case (1 << CX20442_TELIN): | |
135 | case (1 << CX20442_TELOUT) | (1 << CX20442_TELIN): | |
136 | return V253_VLS_L; | |
137 | case (1 << CX20442_TELOUT) | (1 << CX20442_MIC): | |
138 | return V253_VLS_NONE; | |
139 | } | |
140 | return -EINVAL; | |
141 | } | |
142 | static int cx20442_pm_to_v253_vsp(u8 value) | |
143 | { | |
b84eab08 | 144 | switch (value & ~(1 << CX20442_AGC)) { |
459dc352 JK |
145 | case (1 << CX20442_SPKOUT): |
146 | case (1 << CX20442_MIC): | |
147 | case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC): | |
148 | return (bool)(value & (1 << CX20442_AGC)); | |
149 | } | |
150 | return (value & (1 << CX20442_AGC)) ? -EINVAL : 0; | |
151 | } | |
152 | ||
153 | static int cx20442_write(struct snd_soc_codec *codec, unsigned int reg, | |
154 | unsigned int value) | |
155 | { | |
f0fba2ad | 156 | struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec); |
459dc352 JK |
157 | u8 *reg_cache = codec->reg_cache; |
158 | int vls, vsp, old, len; | |
159 | char buf[18]; | |
160 | ||
f0fba2ad | 161 | if (reg >= codec->driver->reg_cache_size) |
459dc352 JK |
162 | return -EINVAL; |
163 | ||
b84eab08 | 164 | /* hw_write and control_data pointers required for talking to the modem |
ad120dae | 165 | * are expected to be set by the line discipline initialization code */ |
f0fba2ad | 166 | if (!codec->hw_write || !cx20442->control_data) |
459dc352 JK |
167 | return -EIO; |
168 | ||
169 | old = reg_cache[reg]; | |
170 | reg_cache[reg] = value; | |
171 | ||
172 | vls = cx20442_pm_to_v253_vls(value); | |
173 | if (vls < 0) | |
174 | return vls; | |
175 | ||
176 | vsp = cx20442_pm_to_v253_vsp(value); | |
b84eab08 | 177 | if (vsp < 0) |
459dc352 JK |
178 | return vsp; |
179 | ||
180 | if ((vls == V253_VLS_T) || | |
181 | (vls == cx20442_pm_to_v253_vls(old))) { | |
182 | if (vsp == cx20442_pm_to_v253_vsp(old)) | |
183 | return 0; | |
184 | len = snprintf(buf, ARRAY_SIZE(buf), "at+vsp=%d\r", vsp); | |
185 | } else if (vsp == cx20442_pm_to_v253_vsp(old)) | |
186 | len = snprintf(buf, ARRAY_SIZE(buf), "at+vls=%d\r", vls); | |
187 | else | |
188 | len = snprintf(buf, ARRAY_SIZE(buf), | |
189 | "at+vls=%d;+vsp=%d\r", vls, vsp); | |
190 | ||
191 | if (unlikely(len > (ARRAY_SIZE(buf) - 1))) | |
192 | return -ENOMEM; | |
193 | ||
4977b03e | 194 | dev_dbg(codec->dev, "%s: %s\n", __func__, buf); |
f0fba2ad | 195 | if (codec->hw_write(cx20442->control_data, buf, len) != len) |
459dc352 JK |
196 | return -EIO; |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
ad120dae | 201 | |
ad120dae JK |
202 | /* |
203 | * Line discpline related code | |
204 | * | |
205 | * Any of the callback functions below can be used in two ways: | |
206 | * 1) registerd by a machine driver as one of line discipline operations, | |
207 | * 2) called from a machine's provided line discipline callback function | |
208 | * in case when extra machine specific code must be run as well. | |
209 | */ | |
210 | ||
211 | /* Modem init: echo off, digital speaker off, quiet off, voice mode */ | |
212 | static const char *v253_init = "ate0m0q0+fclass=8\r"; | |
213 | ||
214 | /* Line discipline .open() */ | |
215 | static int v253_open(struct tty_struct *tty) | |
216 | { | |
ad120dae JK |
217 | int ret, len = strlen(v253_init); |
218 | ||
219 | /* Doesn't make sense without write callback */ | |
220 | if (!tty->ops->write) | |
221 | return -EINVAL; | |
222 | ||
f0fba2ad LG |
223 | /* Won't work if no codec pointer has been passed by a card driver */ |
224 | if (!tty->disc_data) | |
225 | return -ENODEV; | |
ad120dae JK |
226 | |
227 | if (tty->ops->write(tty, v253_init, len) != len) { | |
228 | ret = -EIO; | |
229 | goto err; | |
230 | } | |
231 | /* Actual setup will be performed after the modem responds. */ | |
232 | return 0; | |
233 | err: | |
234 | tty->disc_data = NULL; | |
235 | return ret; | |
236 | } | |
237 | ||
238 | /* Line discipline .close() */ | |
239 | static void v253_close(struct tty_struct *tty) | |
240 | { | |
241 | struct snd_soc_codec *codec = tty->disc_data; | |
f0fba2ad | 242 | struct cx20442_priv *cx20442; |
ad120dae JK |
243 | |
244 | tty->disc_data = NULL; | |
245 | ||
246 | if (!codec) | |
247 | return; | |
248 | ||
f0fba2ad LG |
249 | cx20442 = snd_soc_codec_get_drvdata(codec); |
250 | ||
ad120dae JK |
251 | /* Prevent the codec driver from further accessing the modem */ |
252 | codec->hw_write = NULL; | |
f0fba2ad | 253 | cx20442->control_data = NULL; |
3a45b867 | 254 | codec->card->pop_time = 0; |
ad120dae JK |
255 | } |
256 | ||
257 | /* Line discipline .hangup() */ | |
258 | static int v253_hangup(struct tty_struct *tty) | |
259 | { | |
260 | v253_close(tty); | |
261 | return 0; | |
262 | } | |
263 | ||
264 | /* Line discipline .receive_buf() */ | |
bb3d6bf1 LT |
265 | static void v253_receive(struct tty_struct *tty, |
266 | const unsigned char *cp, char *fp, int count) | |
ad120dae JK |
267 | { |
268 | struct snd_soc_codec *codec = tty->disc_data; | |
f0fba2ad | 269 | struct cx20442_priv *cx20442; |
ad120dae JK |
270 | |
271 | if (!codec) | |
bb3d6bf1 | 272 | return; |
ad120dae | 273 | |
f0fba2ad LG |
274 | cx20442 = snd_soc_codec_get_drvdata(codec); |
275 | ||
276 | if (!cx20442->control_data) { | |
ad120dae JK |
277 | /* First modem response, complete setup procedure */ |
278 | ||
279 | /* Set up codec driver access to modem controls */ | |
f0fba2ad | 280 | cx20442->control_data = tty; |
ad120dae | 281 | codec->hw_write = (hw_write_t)tty->ops->write; |
3a45b867 | 282 | codec->card->pop_time = 1; |
ad120dae JK |
283 | } |
284 | } | |
285 | ||
286 | /* Line discipline .write_wakeup() */ | |
287 | static void v253_wakeup(struct tty_struct *tty) | |
288 | { | |
289 | } | |
290 | ||
291 | struct 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 | }; | |
301 | EXPORT_SYMBOL_GPL(v253_ops); | |
302 | ||
303 | ||
304 | /* | |
305 | * Codec DAI | |
306 | */ | |
307 | ||
f0fba2ad | 308 | static struct snd_soc_dai_driver cx20442_dai = { |
5394637a | 309 | .name = "cx20442-voice", |
459dc352 JK |
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 | }; | |
459dc352 | 325 | |
f0fba2ad | 326 | static int cx20442_codec_probe(struct snd_soc_codec *codec) |
459dc352 | 327 | { |
f0fba2ad | 328 | struct cx20442_priv *cx20442; |
459dc352 | 329 | |
f0fba2ad LG |
330 | cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL); |
331 | if (cx20442 == NULL) | |
332 | return -ENOMEM; | |
333 | snd_soc_codec_set_drvdata(codec, cx20442); | |
459dc352 | 334 | |
f0fba2ad LG |
335 | cx20442->control_data = NULL; |
336 | codec->hw_write = NULL; | |
3a45b867 | 337 | codec->card->pop_time = 0; |
f0fba2ad LG |
338 | |
339 | return 0; | |
459dc352 JK |
340 | } |
341 | ||
342 | /* power down chip */ | |
f0fba2ad | 343 | static int cx20442_codec_remove(struct snd_soc_codec *codec) |
459dc352 | 344 | { |
f0fba2ad | 345 | struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec); |
459dc352 | 346 | |
f0fba2ad LG |
347 | if (cx20442->control_data) { |
348 | struct tty_struct *tty = cx20442->control_data; | |
349 | tty_hangup(tty); | |
350 | } | |
459dc352 | 351 | |
f0fba2ad | 352 | kfree(cx20442); |
459dc352 JK |
353 | return 0; |
354 | } | |
355 | ||
8e6bfb9b | 356 | static const u8 cx20442_reg; |
f019ee5f | 357 | |
f0fba2ad | 358 | static struct snd_soc_codec_driver cx20442_codec_dev = { |
459dc352 JK |
359 | .probe = cx20442_codec_probe, |
360 | .remove = cx20442_codec_remove, | |
f019ee5f | 361 | .reg_cache_default = &cx20442_reg, |
f0fba2ad LG |
362 | .reg_cache_size = 1, |
363 | .reg_word_size = sizeof(u8), | |
364 | .read = cx20442_read_reg_cache, | |
365 | .write = cx20442_write, | |
51fb1a87 LG |
366 | .dapm_widgets = cx20442_dapm_widgets, |
367 | .num_dapm_widgets = ARRAY_SIZE(cx20442_dapm_widgets), | |
368 | .dapm_routes = cx20442_audio_map, | |
369 | .num_dapm_routes = ARRAY_SIZE(cx20442_audio_map), | |
459dc352 | 370 | }; |
459dc352 JK |
371 | |
372 | static int cx20442_platform_probe(struct platform_device *pdev) | |
373 | { | |
f0fba2ad LG |
374 | return snd_soc_register_codec(&pdev->dev, |
375 | &cx20442_codec_dev, &cx20442_dai, 1); | |
459dc352 JK |
376 | } |
377 | ||
378 | static int __exit cx20442_platform_remove(struct platform_device *pdev) | |
379 | { | |
f0fba2ad | 380 | snd_soc_unregister_codec(&pdev->dev); |
459dc352 JK |
381 | return 0; |
382 | } | |
383 | ||
384 | static struct platform_driver cx20442_platform_driver = { | |
385 | .driver = { | |
f0fba2ad | 386 | .name = "cx20442-codec", |
459dc352 JK |
387 | .owner = THIS_MODULE, |
388 | }, | |
389 | .probe = cx20442_platform_probe, | |
390 | .remove = __exit_p(cx20442_platform_remove), | |
391 | }; | |
392 | ||
393 | static int __init cx20442_init(void) | |
394 | { | |
395 | return platform_driver_register(&cx20442_platform_driver); | |
396 | } | |
397 | module_init(cx20442_init); | |
398 | ||
399 | static void __exit cx20442_exit(void) | |
400 | { | |
401 | platform_driver_unregister(&cx20442_platform_driver); | |
402 | } | |
403 | module_exit(cx20442_exit); | |
404 | ||
405 | MODULE_DESCRIPTION("ASoC CX20442-11 voice modem codec driver"); | |
406 | MODULE_AUTHOR("Janusz Krzysztofik"); | |
407 | MODULE_LICENSE("GPL"); | |
f0fba2ad | 408 | MODULE_ALIAS("platform:cx20442-codec"); |