// SPDX-License-Identifier: GPL-2.0-only /* * ams-delta.c -- SoC audio for Amstrad E3 (Delta) videophone * * Copyright (C) 2009 Janusz Krzysztofik <[email protected]> * * Initially based on sound/soc/omap/osk5912.x * Copyright (C) 2008 Mistral Solutions */ #include <linux/gpio/consumer.h> #include <linux/spinlock.h> #include <linux/tty.h> #include <linux/module.h> #include <sound/soc.h> #include <sound/jack.h> #include <linux/platform_data/asoc-ti-mcbsp.h> #include "omap-mcbsp.h" #include "../codecs/cx20442.h" static struct gpio_desc *handset_mute; static struct gpio_desc *handsfree_mute; static int ams_delta_event_handset(struct snd_soc_dapm_widget *w, struct snd_kcontrol *k, int event) { … } static int ams_delta_event_handsfree(struct snd_soc_dapm_widget *w, struct snd_kcontrol *k, int event) { … } /* Board specific DAPM widgets */ static const struct snd_soc_dapm_widget ams_delta_dapm_widgets[] = …; /* How they are connected to codec pins */ static const struct snd_soc_dapm_route ams_delta_audio_map[] = …; /* * Controls, functional after the modem line discipline is activated. */ /* Virtual switch: audio input/output constellations */ static const char *ams_delta_audio_mode[] = …; /* Selection <-> pin translation */ #define AMS_DELTA_MOUTHPIECE … #define AMS_DELTA_EARPIECE … #define AMS_DELTA_MICROPHONE … #define AMS_DELTA_SPEAKER … #define AMS_DELTA_AGC … #define AMS_DELTA_MIXED … #define AMS_DELTA_HANDSET … #define AMS_DELTA_HANDSFREE … #define AMS_DELTA_SPEAKERPHONE … static const unsigned short ams_delta_audio_mode_pins[] = …; static unsigned short ams_delta_audio_agc; /* * Used for passing a codec structure pointer * from the board initialization code to the tty line discipline. */ static struct snd_soc_component *cx20442_codec; static int ams_delta_set_audio_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int ams_delta_get_audio_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static SOC_ENUM_SINGLE_EXT_DECL(ams_delta_audio_enum, ams_delta_audio_mode); static const struct snd_kcontrol_new ams_delta_audio_controls[] = …; /* Hook switch */ static struct snd_soc_jack ams_delta_hook_switch; static struct snd_soc_jack_gpio ams_delta_hook_switch_gpios[] = …; /* After we are able to control the codec over the modem, * the hook switch can be used for dynamic DAPM reconfiguration. */ static struct snd_soc_jack_pin ams_delta_hook_switch_pins[] = …; /* * Modem line discipline, required for making above controls functional. * Activated from userspace with ldattach, possibly invoked from udev rule. */ /* To actually apply any modem controlled configuration changes to the codec, * we must connect codec DAI pins to the modem for a moment. Be careful not * to interfere with our digital mute function that shares the same hardware. */ static struct timer_list cx81801_timer; static bool cx81801_cmd_pending; static bool ams_delta_muted; static DEFINE_SPINLOCK(ams_delta_lock); static struct gpio_desc *gpiod_modem_codec; static void cx81801_timeout(struct timer_list *unused) { … } /* Line discipline .open() */ static int cx81801_open(struct tty_struct *tty) { … } /* Line discipline .close() */ static void cx81801_close(struct tty_struct *tty) { … } /* Line discipline .hangup() */ static void cx81801_hangup(struct tty_struct *tty) { … } /* Line discipline .receive_buf() */ static void cx81801_receive(struct tty_struct *tty, const u8 *cp, const u8 *fp, size_t count) { … } /* Line discipline .write_wakeup() */ static void cx81801_wakeup(struct tty_struct *tty) { … } static struct tty_ldisc_ops cx81801_ops = …; /* * Even if not very useful, the sound card can still work without any of the * above functionality activated. You can still control its audio input/output * constellation and speakerphone gain from userspace by issuing AT commands * over the modem port. */ static struct snd_soc_ops ams_delta_ops; /* Digital mute implemented using modem/CPU multiplexer. * Shares hardware with codec config pulse generation */ static bool ams_delta_muted = …; static int ams_delta_mute(struct snd_soc_dai *dai, int mute, int direction) { … } /* Our codec DAI probably doesn't have its own .ops structure */ static const struct snd_soc_dai_ops ams_delta_dai_ops = …; /* Will be used if the codec ever has its own digital_mute function */ static int ams_delta_startup(struct snd_pcm_substream *substream) { … } static void ams_delta_shutdown(struct snd_pcm_substream *substream) { … } /* * Card initialization */ static int ams_delta_cx20442_init(struct snd_soc_pcm_runtime *rtd) { … } /* DAI glue - connects codec <--> CPU */ SND_SOC_DAILINK_DEFS(…); static struct snd_soc_dai_link ams_delta_dai_link = …; /* Audio card driver */ static struct snd_soc_card ams_delta_audio_card = …; /* Module init/exit */ static int ams_delta_probe(struct platform_device *pdev) { … } static void ams_delta_remove(struct platform_device *pdev) { … } #define DRV_NAME … static struct platform_driver ams_delta_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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