1 // SPDX-License-Identifier: GPL-2.0-only
3  * ams-delta.c  --  SoC audio for Amstrad E3 (Delta) videophone
19 #include <linux/platform_data/asoc-ti-mcbsp.h>
21 #include "omap-mcbsp.h"
61  * Controls, functional after the modem line discipline is activated.
68 /* Selection <-> pin translation */
102 	struct snd_soc_dapm_context *dapm = &card->dapm;  in ams_delta_set_audio_mode()
103 	struct soc_enum *control = (struct soc_enum *)kcontrol->private_value;  in ams_delta_set_audio_mode()
108 	if (!cx20442_codec->card->pop_time)  in ams_delta_set_audio_mode()
109 		return -EUNATCH;  in ams_delta_set_audio_mode()
111 	if (ucontrol->value.enumerated.item[0] >= control->items)  in ams_delta_set_audio_mode()
112 		return -EINVAL;  in ams_delta_set_audio_mode()
117 	pins = ams_delta_audio_mode_pins[ucontrol->value.enumerated.item[0]];  in ams_delta_set_audio_mode()
175 	struct snd_soc_dapm_context *dapm = &card->dapm;  in ams_delta_get_audio_mode()
197 		return -EINVAL;  in ams_delta_get_audio_mode()
199 	ucontrol->value.enumerated.item[0] = mode;  in ams_delta_get_audio_mode()
223 /* After we are able to control the codec over the modem,
250  * Modem line discipline, required for making above controls functional.
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
272 	/* Reconnect the codec DAI back from the modem to the CPU DAI  in cx81801_timeout()
284 		return -ENODEV;  in cx81801_open()
290 	tty->disc_data = cx20442_codec;  in cx81801_open()
295 		tty->disc_data = NULL;  in cx81801_open()
303 	struct snd_soc_component *component = tty->disc_data;  in cx81801_close()
316 	dapm = &component->card->dapm;  in cx81801_close()
342 	struct snd_soc_component *component = tty->disc_data;  in cx81801_receive()
349 	if (!component->card->pop_time) {  in cx81801_receive()
350 		/* First modem response, complete setup procedure */  in cx81801_receive()
362 			dev_warn(component->dev,  in cx81801_receive()
371 	for (c = &cp[count - 1]; c >= cp; c--) {  in cx81801_receive()
374 		/* Complete modem response received, apply config to codec */  in cx81801_receive()
382 		/* Apply config pulse by connecting the codec to the modem  in cx81801_receive()
412  * over the modem port.
418 /* Digital mute implemented using modem/CPU multiplexer.
448 	return ams_delta_mute(NULL, 0, substream->stream);  in ams_delta_startup()
453 	ams_delta_mute(NULL, 1, substream->stream);  in ams_delta_shutdown()
464 	struct snd_soc_card *card = rtd->card;  in ams_delta_cx20442_init()
465 	struct snd_soc_dapm_context *dapm = &card->dapm;  in ams_delta_cx20442_init()
470 	cx20442_codec = snd_soc_rtd_to_codec(rtd, 0)->component;  in ams_delta_cx20442_init()
472 	/* Add hook switch - can be used to control the codec from userspace  in ams_delta_cx20442_init()
477 		dev_warn(card->dev,  in ams_delta_cx20442_init()
481 		ret = snd_soc_jack_add_gpiods(card->dev, &ams_delta_hook_switch,  in ams_delta_cx20442_init()
485 			dev_warn(card->dev,  in ams_delta_cx20442_init()
490 	gpiod_modem_codec = devm_gpiod_get(card->dev, "modem_codec",  in ams_delta_cx20442_init()
493 		dev_warn(card->dev, "Failed to obtain modem_codec GPIO\n");  in ams_delta_cx20442_init()
498 	if (!codec_dai->driver->ops) {  in ams_delta_cx20442_init()
499 		codec_dai->driver->ops = &ams_delta_dai_ops;  in ams_delta_cx20442_init()
505 	/* Register optional line discipline for over the modem control */  in ams_delta_cx20442_init()
508 		dev_warn(card->dev,  in ams_delta_cx20442_init()
523 /* DAI glue - connects codec <--> CPU */
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")));
532 	.init = ams_delta_cx20442_init,
554 /* Module init/exit */
560 	card->dev = &pdev->dev;  in ams_delta_probe()
562 	handset_mute = devm_gpiod_get(card->dev, "handset_mute",  in ams_delta_probe()
567 	handsfree_mute = devm_gpiod_get(card->dev, "handsfree_mute",  in ams_delta_probe()
574 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);  in ams_delta_probe()
575 		card->dev = NULL;  in ams_delta_probe()
588 	card->dev = NULL;  in ams_delta_remove()
591 #define DRV_NAME "ams-delta-audio"