1 // SPDX-License-Identifier: GPL-2.0-only
3  * ams-delta.c  --  SoC audio for Amstrad E3 (Delta) videophone
19 #include <asm/mach-types.h>
21 #include <linux/platform_data/asoc-ti-mcbsp.h>
23 #include "omap-mcbsp.h"
63  * Controls, functional after the modem line discipline is activated.
70 /* Selection <-> pin translation */
104 	struct snd_soc_dapm_context *dapm = &card->dapm;  in ams_delta_set_audio_mode()
105 	struct soc_enum *control = (struct soc_enum *)kcontrol->private_value;  in ams_delta_set_audio_mode()
110 	if (!cx20442_codec->card->pop_time)  in ams_delta_set_audio_mode()
111 		return -EUNATCH;  in ams_delta_set_audio_mode()
113 	if (ucontrol->value.enumerated.item[0] >= control->items)  in ams_delta_set_audio_mode()
114 		return -EINVAL;  in ams_delta_set_audio_mode()
119 	pins = ams_delta_audio_mode_pins[ucontrol->value.enumerated.item[0]];  in ams_delta_set_audio_mode()
177 	struct snd_soc_dapm_context *dapm = &card->dapm;  in ams_delta_get_audio_mode()
199 		return -EINVAL;  in ams_delta_get_audio_mode()
201 	ucontrol->value.enumerated.item[0] = mode;  in ams_delta_get_audio_mode()
225 /* After we are able to control the codec over the modem,
252  * Modem line discipline, required for making above controls functional.
256 /* To actually apply any modem controlled configuration changes to the codec,
257  * we must connect codec DAI pins to the modem for a moment.  Be careful not
274 	/* Reconnect the codec DAI back from the modem to the CPU DAI  in cx81801_timeout()
286 		return -ENODEV;  in cx81801_open()
292 	tty->disc_data = cx20442_codec;  in cx81801_open()
297 		tty->disc_data = NULL;  in cx81801_open()
305 	struct snd_soc_component *component = tty->disc_data;  in cx81801_close()
306 	struct snd_soc_dapm_context *dapm = &component->card->dapm;  in cx81801_close()
343 	struct snd_soc_component *component = tty->disc_data;  in cx81801_receive()
350 	if (!component->card->pop_time) {  in cx81801_receive()
351 		/* First modem response, complete setup procedure */  in cx81801_receive()
363 			dev_warn(component->dev,  in cx81801_receive()
372 	for (c = &cp[count - 1]; c >= cp; c--) {  in cx81801_receive()
375 		/* Complete modem response received, apply config to codec */  in cx81801_receive()
383 		/* Apply config pulse by connecting the codec to the modem  in cx81801_receive()
413  * over the modem port.
419 /* Digital mute implemented using modem/CPU multiplexer.
449 	return ams_delta_mute(NULL, 0, substream->stream);  in ams_delta_startup()
454 	ams_delta_mute(NULL, 1, substream->stream);  in ams_delta_shutdown()
465 	struct snd_soc_card *card = rtd->card;  in ams_delta_cx20442_init()
466 	struct snd_soc_dapm_context *dapm = &card->dapm;  in ams_delta_cx20442_init()
471 	cx20442_codec = asoc_rtd_to_codec(rtd, 0)->component;  in ams_delta_cx20442_init()
473 	/* Add hook switch - can be used to control the codec from userspace  in ams_delta_cx20442_init()
478 		dev_warn(card->dev,  in ams_delta_cx20442_init()
482 		ret = snd_soc_jack_add_gpiods(card->dev, &ams_delta_hook_switch,  in ams_delta_cx20442_init()
486 			dev_warn(card->dev,  in ams_delta_cx20442_init()
491 	gpiod_modem_codec = devm_gpiod_get(card->dev, "modem_codec",  in ams_delta_cx20442_init()
494 		dev_warn(card->dev, "Failed to obtain modem_codec GPIO\n");  in ams_delta_cx20442_init()
499 	if (!codec_dai->driver->ops) {  in ams_delta_cx20442_init()
500 		codec_dai->driver->ops = &ams_delta_dai_ops;  in ams_delta_cx20442_init()
506 	/* Register optional line discipline for over the modem control */  in ams_delta_cx20442_init()
509 		dev_warn(card->dev,  in ams_delta_cx20442_init()
524 /* DAI glue - connects codec <--> CPU */
526 	DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.1")),
527 	DAILINK_COMP_ARRAY(COMP_CODEC("cx20442-codec", "cx20442-voice")),
528 	DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.1")));
533 	.init = ams_delta_cx20442_init,
555 /* Module init/exit */
561 	card->dev = &pdev->dev;  in ams_delta_probe()
563 	handset_mute = devm_gpiod_get(card->dev, "handset_mute",  in ams_delta_probe()
568 	handsfree_mute = devm_gpiod_get(card->dev, "handsfree_mute",  in ams_delta_probe()
575 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);  in ams_delta_probe()
576 		card->dev = NULL;  in ams_delta_probe()
587 		dev_warn(&pdev->dev,  in ams_delta_remove()
591 	card->dev = NULL;  in ams_delta_remove()
595 #define DRV_NAME "ams-delta-audio"