1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * ams-delta.c -- SoC audio for Amstrad E3 (Delta) videophone |
4 | * |
5 | * Copyright (C) 2009 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> |
6 | * |
7 | * Initially based on sound/soc/omap/osk5912.x |
8 | * Copyright (C) 2008 Mistral Solutions |
9 | */ |
10 | |
11 | #include <linux/gpio/consumer.h> |
12 | #include <linux/spinlock.h> |
13 | #include <linux/tty.h> |
14 | #include <linux/module.h> |
15 | |
16 | #include <sound/soc.h> |
17 | #include <sound/jack.h> |
18 | |
19 | #include <linux/platform_data/asoc-ti-mcbsp.h> |
20 | |
21 | #include "omap-mcbsp.h" |
22 | #include "../codecs/cx20442.h" |
23 | |
24 | static struct gpio_desc *handset_mute; |
25 | static struct gpio_desc *handsfree_mute; |
26 | |
27 | static int ams_delta_event_handset(struct snd_soc_dapm_widget *w, |
28 | struct snd_kcontrol *k, int event) |
29 | { |
30 | gpiod_set_value_cansleep(desc: handset_mute, value: !SND_SOC_DAPM_EVENT_ON(event)); |
31 | return 0; |
32 | } |
33 | |
34 | static int ams_delta_event_handsfree(struct snd_soc_dapm_widget *w, |
35 | struct snd_kcontrol *k, int event) |
36 | { |
37 | gpiod_set_value_cansleep(desc: handsfree_mute, value: !SND_SOC_DAPM_EVENT_ON(event)); |
38 | return 0; |
39 | } |
40 | |
41 | /* Board specific DAPM widgets */ |
42 | static const struct snd_soc_dapm_widget ams_delta_dapm_widgets[] = { |
43 | /* Handset */ |
44 | SND_SOC_DAPM_MIC("Mouthpiece" , NULL), |
45 | SND_SOC_DAPM_HP("Earpiece" , ams_delta_event_handset), |
46 | /* Handsfree/Speakerphone */ |
47 | SND_SOC_DAPM_MIC("Microphone" , NULL), |
48 | SND_SOC_DAPM_SPK("Speaker" , ams_delta_event_handsfree), |
49 | }; |
50 | |
51 | /* How they are connected to codec pins */ |
52 | static const struct snd_soc_dapm_route ams_delta_audio_map[] = { |
53 | {"TELIN" , NULL, "Mouthpiece" }, |
54 | {"Earpiece" , NULL, "TELOUT" }, |
55 | |
56 | {"MIC" , NULL, "Microphone" }, |
57 | {"Speaker" , NULL, "SPKOUT" }, |
58 | }; |
59 | |
60 | /* |
61 | * Controls, functional after the modem line discipline is activated. |
62 | */ |
63 | |
64 | /* Virtual switch: audio input/output constellations */ |
65 | static const char *ams_delta_audio_mode[] = |
66 | {"Mixed" , "Handset" , "Handsfree" , "Speakerphone" }; |
67 | |
68 | /* Selection <-> pin translation */ |
69 | #define AMS_DELTA_MOUTHPIECE 0 |
70 | #define AMS_DELTA_EARPIECE 1 |
71 | #define AMS_DELTA_MICROPHONE 2 |
72 | #define AMS_DELTA_SPEAKER 3 |
73 | #define AMS_DELTA_AGC 4 |
74 | |
75 | #define AMS_DELTA_MIXED ((1 << AMS_DELTA_EARPIECE) | \ |
76 | (1 << AMS_DELTA_MICROPHONE)) |
77 | #define AMS_DELTA_HANDSET ((1 << AMS_DELTA_MOUTHPIECE) | \ |
78 | (1 << AMS_DELTA_EARPIECE)) |
79 | #define AMS_DELTA_HANDSFREE ((1 << AMS_DELTA_MICROPHONE) | \ |
80 | (1 << AMS_DELTA_SPEAKER)) |
81 | #define AMS_DELTA_SPEAKERPHONE (AMS_DELTA_HANDSFREE | (1 << AMS_DELTA_AGC)) |
82 | |
83 | static const unsigned short ams_delta_audio_mode_pins[] = { |
84 | AMS_DELTA_MIXED, |
85 | AMS_DELTA_HANDSET, |
86 | AMS_DELTA_HANDSFREE, |
87 | AMS_DELTA_SPEAKERPHONE, |
88 | }; |
89 | |
90 | static unsigned short ams_delta_audio_agc; |
91 | |
92 | /* |
93 | * Used for passing a codec structure pointer |
94 | * from the board initialization code to the tty line discipline. |
95 | */ |
96 | static struct snd_soc_component *cx20442_codec; |
97 | |
98 | static int ams_delta_set_audio_mode(struct snd_kcontrol *kcontrol, |
99 | struct snd_ctl_elem_value *ucontrol) |
100 | { |
101 | struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); |
102 | struct snd_soc_dapm_context *dapm = &card->dapm; |
103 | struct soc_enum *control = (struct soc_enum *)kcontrol->private_value; |
104 | unsigned short pins; |
105 | int pin, changed = 0; |
106 | |
107 | /* Refuse any mode changes if we are not able to control the codec. */ |
108 | if (!cx20442_codec->card->pop_time) |
109 | return -EUNATCH; |
110 | |
111 | if (ucontrol->value.enumerated.item[0] >= control->items) |
112 | return -EINVAL; |
113 | |
114 | snd_soc_dapm_mutex_lock(dapm); |
115 | |
116 | /* Translate selection to bitmap */ |
117 | pins = ams_delta_audio_mode_pins[ucontrol->value.enumerated.item[0]]; |
118 | |
119 | /* Setup pins after corresponding bits if changed */ |
120 | pin = !!(pins & (1 << AMS_DELTA_MOUTHPIECE)); |
121 | |
122 | if (pin != snd_soc_dapm_get_pin_status(dapm, pin: "Mouthpiece" )) { |
123 | changed = 1; |
124 | if (pin) |
125 | snd_soc_dapm_enable_pin_unlocked(dapm, pin: "Mouthpiece" ); |
126 | else |
127 | snd_soc_dapm_disable_pin_unlocked(dapm, pin: "Mouthpiece" ); |
128 | } |
129 | pin = !!(pins & (1 << AMS_DELTA_EARPIECE)); |
130 | if (pin != snd_soc_dapm_get_pin_status(dapm, pin: "Earpiece" )) { |
131 | changed = 1; |
132 | if (pin) |
133 | snd_soc_dapm_enable_pin_unlocked(dapm, pin: "Earpiece" ); |
134 | else |
135 | snd_soc_dapm_disable_pin_unlocked(dapm, pin: "Earpiece" ); |
136 | } |
137 | pin = !!(pins & (1 << AMS_DELTA_MICROPHONE)); |
138 | if (pin != snd_soc_dapm_get_pin_status(dapm, pin: "Microphone" )) { |
139 | changed = 1; |
140 | if (pin) |
141 | snd_soc_dapm_enable_pin_unlocked(dapm, pin: "Microphone" ); |
142 | else |
143 | snd_soc_dapm_disable_pin_unlocked(dapm, pin: "Microphone" ); |
144 | } |
145 | pin = !!(pins & (1 << AMS_DELTA_SPEAKER)); |
146 | if (pin != snd_soc_dapm_get_pin_status(dapm, pin: "Speaker" )) { |
147 | changed = 1; |
148 | if (pin) |
149 | snd_soc_dapm_enable_pin_unlocked(dapm, pin: "Speaker" ); |
150 | else |
151 | snd_soc_dapm_disable_pin_unlocked(dapm, pin: "Speaker" ); |
152 | } |
153 | pin = !!(pins & (1 << AMS_DELTA_AGC)); |
154 | if (pin != ams_delta_audio_agc) { |
155 | ams_delta_audio_agc = pin; |
156 | changed = 1; |
157 | if (pin) |
158 | snd_soc_dapm_enable_pin_unlocked(dapm, pin: "AGCIN" ); |
159 | else |
160 | snd_soc_dapm_disable_pin_unlocked(dapm, pin: "AGCIN" ); |
161 | } |
162 | |
163 | if (changed) |
164 | snd_soc_dapm_sync_unlocked(dapm); |
165 | |
166 | snd_soc_dapm_mutex_unlock(dapm); |
167 | |
168 | return changed; |
169 | } |
170 | |
171 | static int ams_delta_get_audio_mode(struct snd_kcontrol *kcontrol, |
172 | struct snd_ctl_elem_value *ucontrol) |
173 | { |
174 | struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); |
175 | struct snd_soc_dapm_context *dapm = &card->dapm; |
176 | unsigned short pins, mode; |
177 | |
178 | pins = ((snd_soc_dapm_get_pin_status(dapm, pin: "Mouthpiece" ) << |
179 | AMS_DELTA_MOUTHPIECE) | |
180 | (snd_soc_dapm_get_pin_status(dapm, pin: "Earpiece" ) << |
181 | AMS_DELTA_EARPIECE)); |
182 | if (pins) |
183 | pins |= (snd_soc_dapm_get_pin_status(dapm, pin: "Microphone" ) << |
184 | AMS_DELTA_MICROPHONE); |
185 | else |
186 | pins = ((snd_soc_dapm_get_pin_status(dapm, pin: "Microphone" ) << |
187 | AMS_DELTA_MICROPHONE) | |
188 | (snd_soc_dapm_get_pin_status(dapm, pin: "Speaker" ) << |
189 | AMS_DELTA_SPEAKER) | |
190 | (ams_delta_audio_agc << AMS_DELTA_AGC)); |
191 | |
192 | for (mode = 0; mode < ARRAY_SIZE(ams_delta_audio_mode); mode++) |
193 | if (pins == ams_delta_audio_mode_pins[mode]) |
194 | break; |
195 | |
196 | if (mode >= ARRAY_SIZE(ams_delta_audio_mode)) |
197 | return -EINVAL; |
198 | |
199 | ucontrol->value.enumerated.item[0] = mode; |
200 | |
201 | return 0; |
202 | } |
203 | |
204 | static SOC_ENUM_SINGLE_EXT_DECL(ams_delta_audio_enum, |
205 | ams_delta_audio_mode); |
206 | |
207 | static const struct snd_kcontrol_new ams_delta_audio_controls[] = { |
208 | SOC_ENUM_EXT("Audio Mode" , ams_delta_audio_enum, |
209 | ams_delta_get_audio_mode, ams_delta_set_audio_mode), |
210 | }; |
211 | |
212 | /* Hook switch */ |
213 | static struct snd_soc_jack ams_delta_hook_switch; |
214 | static struct snd_soc_jack_gpio ams_delta_hook_switch_gpios[] = { |
215 | { |
216 | .name = "hook_switch" , |
217 | .report = SND_JACK_HEADSET, |
218 | .invert = 1, |
219 | .debounce_time = 150, |
220 | } |
221 | }; |
222 | |
223 | /* After we are able to control the codec over the modem, |
224 | * the hook switch can be used for dynamic DAPM reconfiguration. */ |
225 | static struct snd_soc_jack_pin ams_delta_hook_switch_pins[] = { |
226 | /* Handset */ |
227 | { |
228 | .pin = "Mouthpiece" , |
229 | .mask = SND_JACK_MICROPHONE, |
230 | }, |
231 | { |
232 | .pin = "Earpiece" , |
233 | .mask = SND_JACK_HEADPHONE, |
234 | }, |
235 | /* Handsfree */ |
236 | { |
237 | .pin = "Microphone" , |
238 | .mask = SND_JACK_MICROPHONE, |
239 | .invert = 1, |
240 | }, |
241 | { |
242 | .pin = "Speaker" , |
243 | .mask = SND_JACK_HEADPHONE, |
244 | .invert = 1, |
245 | }, |
246 | }; |
247 | |
248 | |
249 | /* |
250 | * Modem line discipline, required for making above controls functional. |
251 | * Activated from userspace with ldattach, possibly invoked from udev rule. |
252 | */ |
253 | |
254 | /* To actually apply any modem controlled configuration changes to the codec, |
255 | * we must connect codec DAI pins to the modem for a moment. Be careful not |
256 | * to interfere with our digital mute function that shares the same hardware. */ |
257 | static struct timer_list cx81801_timer; |
258 | static bool cx81801_cmd_pending; |
259 | static bool ams_delta_muted; |
260 | static DEFINE_SPINLOCK(ams_delta_lock); |
261 | static struct gpio_desc *gpiod_modem_codec; |
262 | |
263 | static void cx81801_timeout(struct timer_list *unused) |
264 | { |
265 | int muted; |
266 | |
267 | spin_lock(lock: &ams_delta_lock); |
268 | cx81801_cmd_pending = 0; |
269 | muted = ams_delta_muted; |
270 | spin_unlock(lock: &ams_delta_lock); |
271 | |
272 | /* Reconnect the codec DAI back from the modem to the CPU DAI |
273 | * only if digital mute still off */ |
274 | if (!muted) |
275 | gpiod_set_value(desc: gpiod_modem_codec, value: 0); |
276 | } |
277 | |
278 | /* Line discipline .open() */ |
279 | static int cx81801_open(struct tty_struct *tty) |
280 | { |
281 | int ret; |
282 | |
283 | if (!cx20442_codec) |
284 | return -ENODEV; |
285 | |
286 | /* |
287 | * Pass the codec structure pointer for use by other ldisc callbacks, |
288 | * both the card and the codec specific parts. |
289 | */ |
290 | tty->disc_data = cx20442_codec; |
291 | |
292 | ret = v253_ops.open(tty); |
293 | |
294 | if (ret < 0) |
295 | tty->disc_data = NULL; |
296 | |
297 | return ret; |
298 | } |
299 | |
300 | /* Line discipline .close() */ |
301 | static void cx81801_close(struct tty_struct *tty) |
302 | { |
303 | struct snd_soc_component *component = tty->disc_data; |
304 | struct snd_soc_dapm_context *dapm; |
305 | |
306 | del_timer_sync(timer: &cx81801_timer); |
307 | |
308 | /* Prevent the hook switch from further changing the DAPM pins */ |
309 | INIT_LIST_HEAD(list: &ams_delta_hook_switch.pins); |
310 | |
311 | if (!component) |
312 | return; |
313 | |
314 | v253_ops.close(tty); |
315 | |
316 | dapm = &component->card->dapm; |
317 | |
318 | /* Revert back to default audio input/output constellation */ |
319 | snd_soc_dapm_mutex_lock(dapm); |
320 | |
321 | snd_soc_dapm_disable_pin_unlocked(dapm, pin: "Mouthpiece" ); |
322 | snd_soc_dapm_enable_pin_unlocked(dapm, pin: "Earpiece" ); |
323 | snd_soc_dapm_enable_pin_unlocked(dapm, pin: "Microphone" ); |
324 | snd_soc_dapm_disable_pin_unlocked(dapm, pin: "Speaker" ); |
325 | snd_soc_dapm_disable_pin_unlocked(dapm, pin: "AGCIN" ); |
326 | |
327 | snd_soc_dapm_sync_unlocked(dapm); |
328 | |
329 | snd_soc_dapm_mutex_unlock(dapm); |
330 | } |
331 | |
332 | /* Line discipline .hangup() */ |
333 | static void cx81801_hangup(struct tty_struct *tty) |
334 | { |
335 | cx81801_close(tty); |
336 | } |
337 | |
338 | /* Line discipline .receive_buf() */ |
339 | static void cx81801_receive(struct tty_struct *tty, const u8 *cp, const u8 *fp, |
340 | size_t count) |
341 | { |
342 | struct snd_soc_component *component = tty->disc_data; |
343 | const unsigned char *c; |
344 | int apply, ret; |
345 | |
346 | if (!component) |
347 | return; |
348 | |
349 | if (!component->card->pop_time) { |
350 | /* First modem response, complete setup procedure */ |
351 | |
352 | /* Initialize timer used for config pulse generation */ |
353 | timer_setup(&cx81801_timer, cx81801_timeout, 0); |
354 | |
355 | v253_ops.receive_buf(tty, cp, fp, count); |
356 | |
357 | /* Link hook switch to DAPM pins */ |
358 | ret = snd_soc_jack_add_pins(jack: &ams_delta_hook_switch, |
359 | ARRAY_SIZE(ams_delta_hook_switch_pins), |
360 | pins: ams_delta_hook_switch_pins); |
361 | if (ret) |
362 | dev_warn(component->dev, |
363 | "Failed to link hook switch to DAPM pins, " |
364 | "will continue with hook switch unlinked.\n" ); |
365 | |
366 | return; |
367 | } |
368 | |
369 | v253_ops.receive_buf(tty, cp, fp, count); |
370 | |
371 | for (c = &cp[count - 1]; c >= cp; c--) { |
372 | if (*c != '\r') |
373 | continue; |
374 | /* Complete modem response received, apply config to codec */ |
375 | |
376 | spin_lock_bh(lock: &ams_delta_lock); |
377 | mod_timer(timer: &cx81801_timer, expires: jiffies + msecs_to_jiffies(m: 150)); |
378 | apply = !ams_delta_muted && !cx81801_cmd_pending; |
379 | cx81801_cmd_pending = 1; |
380 | spin_unlock_bh(lock: &ams_delta_lock); |
381 | |
382 | /* Apply config pulse by connecting the codec to the modem |
383 | * if not already done */ |
384 | if (apply) |
385 | gpiod_set_value(desc: gpiod_modem_codec, value: 1); |
386 | break; |
387 | } |
388 | } |
389 | |
390 | /* Line discipline .write_wakeup() */ |
391 | static void cx81801_wakeup(struct tty_struct *tty) |
392 | { |
393 | v253_ops.write_wakeup(tty); |
394 | } |
395 | |
396 | static struct tty_ldisc_ops cx81801_ops = { |
397 | .name = "cx81801" , |
398 | .num = N_V253, |
399 | .owner = THIS_MODULE, |
400 | .open = cx81801_open, |
401 | .close = cx81801_close, |
402 | .hangup = cx81801_hangup, |
403 | .receive_buf = cx81801_receive, |
404 | .write_wakeup = cx81801_wakeup, |
405 | }; |
406 | |
407 | |
408 | /* |
409 | * Even if not very useful, the sound card can still work without any of the |
410 | * above functionality activated. You can still control its audio input/output |
411 | * constellation and speakerphone gain from userspace by issuing AT commands |
412 | * over the modem port. |
413 | */ |
414 | |
415 | static struct snd_soc_ops ams_delta_ops; |
416 | |
417 | |
418 | /* Digital mute implemented using modem/CPU multiplexer. |
419 | * Shares hardware with codec config pulse generation */ |
420 | static bool ams_delta_muted = 1; |
421 | |
422 | static int ams_delta_mute(struct snd_soc_dai *dai, int mute, int direction) |
423 | { |
424 | int apply; |
425 | |
426 | if (ams_delta_muted == mute) |
427 | return 0; |
428 | |
429 | spin_lock_bh(lock: &ams_delta_lock); |
430 | ams_delta_muted = mute; |
431 | apply = !cx81801_cmd_pending; |
432 | spin_unlock_bh(lock: &ams_delta_lock); |
433 | |
434 | if (apply) |
435 | gpiod_set_value(desc: gpiod_modem_codec, value: !!mute); |
436 | return 0; |
437 | } |
438 | |
439 | /* Our codec DAI probably doesn't have its own .ops structure */ |
440 | static const struct snd_soc_dai_ops ams_delta_dai_ops = { |
441 | .mute_stream = ams_delta_mute, |
442 | .no_capture_mute = 1, |
443 | }; |
444 | |
445 | /* Will be used if the codec ever has its own digital_mute function */ |
446 | static int ams_delta_startup(struct snd_pcm_substream *substream) |
447 | { |
448 | return ams_delta_mute(NULL, mute: 0, direction: substream->stream); |
449 | } |
450 | |
451 | static void ams_delta_shutdown(struct snd_pcm_substream *substream) |
452 | { |
453 | ams_delta_mute(NULL, mute: 1, direction: substream->stream); |
454 | } |
455 | |
456 | |
457 | /* |
458 | * Card initialization |
459 | */ |
460 | |
461 | static int ams_delta_cx20442_init(struct snd_soc_pcm_runtime *rtd) |
462 | { |
463 | struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); |
464 | struct snd_soc_card *card = rtd->card; |
465 | struct snd_soc_dapm_context *dapm = &card->dapm; |
466 | int ret; |
467 | /* Codec is ready, now add/activate board specific controls */ |
468 | |
469 | /* Store a pointer to the codec structure for tty ldisc use */ |
470 | cx20442_codec = snd_soc_rtd_to_codec(rtd, 0)->component; |
471 | |
472 | /* Add hook switch - can be used to control the codec from userspace |
473 | * even if line discipline fails */ |
474 | ret = snd_soc_card_jack_new_pins(card, id: "hook_switch" , type: SND_JACK_HEADSET, |
475 | jack: &ams_delta_hook_switch, NULL, num_pins: 0); |
476 | if (ret) |
477 | dev_warn(card->dev, |
478 | "Failed to allocate resources for hook switch, " |
479 | "will continue without one.\n" ); |
480 | else { |
481 | ret = snd_soc_jack_add_gpiods(gpiod_dev: card->dev, jack: &ams_delta_hook_switch, |
482 | ARRAY_SIZE(ams_delta_hook_switch_gpios), |
483 | gpios: ams_delta_hook_switch_gpios); |
484 | if (ret) |
485 | dev_warn(card->dev, |
486 | "Failed to set up hook switch GPIO line, " |
487 | "will continue with hook switch inactive.\n" ); |
488 | } |
489 | |
490 | gpiod_modem_codec = devm_gpiod_get(dev: card->dev, con_id: "modem_codec" , |
491 | flags: GPIOD_OUT_HIGH); |
492 | if (IS_ERR(ptr: gpiod_modem_codec)) { |
493 | dev_warn(card->dev, "Failed to obtain modem_codec GPIO\n" ); |
494 | return 0; |
495 | } |
496 | |
497 | /* Set up digital mute if not provided by the codec */ |
498 | if (!codec_dai->driver->ops) { |
499 | codec_dai->driver->ops = &ams_delta_dai_ops; |
500 | } else { |
501 | ams_delta_ops.startup = ams_delta_startup; |
502 | ams_delta_ops.shutdown = ams_delta_shutdown; |
503 | } |
504 | |
505 | /* Register optional line discipline for over the modem control */ |
506 | ret = tty_register_ldisc(new_ldisc: &cx81801_ops); |
507 | if (ret) { |
508 | dev_warn(card->dev, |
509 | "Failed to register line discipline, " |
510 | "will continue without any controls.\n" ); |
511 | return 0; |
512 | } |
513 | |
514 | /* Set up initial pin constellation */ |
515 | snd_soc_dapm_disable_pin(dapm, pin: "Mouthpiece" ); |
516 | snd_soc_dapm_disable_pin(dapm, pin: "Speaker" ); |
517 | snd_soc_dapm_disable_pin(dapm, pin: "AGCIN" ); |
518 | snd_soc_dapm_disable_pin(dapm, pin: "AGCOUT" ); |
519 | |
520 | return 0; |
521 | } |
522 | |
523 | /* DAI glue - connects codec <--> CPU */ |
524 | SND_SOC_DAILINK_DEFS(cx20442, |
525 | DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.1" )), |
526 | DAILINK_COMP_ARRAY(COMP_CODEC("cx20442-codec" , "cx20442-voice" )), |
527 | DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.1" ))); |
528 | |
529 | static struct snd_soc_dai_link ams_delta_dai_link = { |
530 | .name = "CX20442" , |
531 | .stream_name = "CX20442" , |
532 | .init = ams_delta_cx20442_init, |
533 | .ops = &ams_delta_ops, |
534 | .dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF | |
535 | SND_SOC_DAIFMT_CBM_CFM, |
536 | SND_SOC_DAILINK_REG(cx20442), |
537 | }; |
538 | |
539 | /* Audio card driver */ |
540 | static struct snd_soc_card ams_delta_audio_card = { |
541 | .name = "AMS_DELTA" , |
542 | .owner = THIS_MODULE, |
543 | .dai_link = &ams_delta_dai_link, |
544 | .num_links = 1, |
545 | |
546 | .controls = ams_delta_audio_controls, |
547 | .num_controls = ARRAY_SIZE(ams_delta_audio_controls), |
548 | .dapm_widgets = ams_delta_dapm_widgets, |
549 | .num_dapm_widgets = ARRAY_SIZE(ams_delta_dapm_widgets), |
550 | .dapm_routes = ams_delta_audio_map, |
551 | .num_dapm_routes = ARRAY_SIZE(ams_delta_audio_map), |
552 | }; |
553 | |
554 | /* Module init/exit */ |
555 | static int ams_delta_probe(struct platform_device *pdev) |
556 | { |
557 | struct snd_soc_card *card = &ams_delta_audio_card; |
558 | int ret; |
559 | |
560 | card->dev = &pdev->dev; |
561 | |
562 | handset_mute = devm_gpiod_get(dev: card->dev, con_id: "handset_mute" , |
563 | flags: GPIOD_OUT_HIGH); |
564 | if (IS_ERR(ptr: handset_mute)) |
565 | return PTR_ERR(ptr: handset_mute); |
566 | |
567 | handsfree_mute = devm_gpiod_get(dev: card->dev, con_id: "handsfree_mute" , |
568 | flags: GPIOD_OUT_HIGH); |
569 | if (IS_ERR(ptr: handsfree_mute)) |
570 | return PTR_ERR(ptr: handsfree_mute); |
571 | |
572 | ret = snd_soc_register_card(card); |
573 | if (ret) { |
574 | dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n" , ret); |
575 | card->dev = NULL; |
576 | return ret; |
577 | } |
578 | return 0; |
579 | } |
580 | |
581 | static void ams_delta_remove(struct platform_device *pdev) |
582 | { |
583 | struct snd_soc_card *card = platform_get_drvdata(pdev); |
584 | |
585 | tty_unregister_ldisc(ldisc: &cx81801_ops); |
586 | |
587 | snd_soc_unregister_card(card); |
588 | card->dev = NULL; |
589 | } |
590 | |
591 | #define DRV_NAME "ams-delta-audio" |
592 | |
593 | static struct platform_driver ams_delta_driver = { |
594 | .driver = { |
595 | .name = DRV_NAME, |
596 | }, |
597 | .probe = ams_delta_probe, |
598 | .remove_new = ams_delta_remove, |
599 | }; |
600 | |
601 | module_platform_driver(ams_delta_driver); |
602 | |
603 | MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>" ); |
604 | MODULE_DESCRIPTION("ALSA SoC driver for Amstrad E3 (Delta) videophone" ); |
605 | MODULE_LICENSE("GPL" ); |
606 | MODULE_ALIAS("platform:" DRV_NAME); |
607 | |