diff options
Diffstat (limited to 'sound/soc/omap/ams-delta.c')
| -rw-r--r-- | sound/soc/omap/ams-delta.c | 594 |
1 files changed, 0 insertions, 594 deletions
diff --git a/sound/soc/omap/ams-delta.c b/sound/soc/omap/ams-delta.c deleted file mode 100644 index 4dce494dfbd3..000000000000 --- a/sound/soc/omap/ams-delta.c +++ /dev/null @@ -1,594 +0,0 @@ -/* - * ams-delta.c -- SoC audio for Amstrad E3 (Delta) videophone - * - * Copyright (C) 2009 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> - * - * Initially based on sound/soc/omap/osk5912.x - * Copyright (C) 2008 Mistral Solutions - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#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 <asm/mach-types.h> - -#include <linux/platform_data/asoc-ti-mcbsp.h> - -#include "omap-mcbsp.h" -#include "../codecs/cx20442.h" - -/* Board specific DAPM widgets */ -static const struct snd_soc_dapm_widget ams_delta_dapm_widgets[] = { - /* Handset */ - SND_SOC_DAPM_MIC("Mouthpiece", NULL), - SND_SOC_DAPM_HP("Earpiece", NULL), - /* Handsfree/Speakerphone */ - SND_SOC_DAPM_MIC("Microphone", NULL), - SND_SOC_DAPM_SPK("Speaker", NULL), -}; - -/* How they are connected to codec pins */ -static const struct snd_soc_dapm_route ams_delta_audio_map[] = { - {"TELIN", NULL, "Mouthpiece"}, - {"Earpiece", NULL, "TELOUT"}, - - {"MIC", NULL, "Microphone"}, - {"Speaker", NULL, "SPKOUT"}, -}; - -/* - * Controls, functional after the modem line discipline is activated. - */ - -/* Virtual switch: audio input/output constellations */ -static const char *ams_delta_audio_mode[] = - {"Mixed", "Handset", "Handsfree", "Speakerphone"}; - -/* Selection <-> pin translation */ -#define AMS_DELTA_MOUTHPIECE 0 -#define AMS_DELTA_EARPIECE 1 -#define AMS_DELTA_MICROPHONE 2 -#define AMS_DELTA_SPEAKER 3 -#define AMS_DELTA_AGC 4 - -#define AMS_DELTA_MIXED ((1 << AMS_DELTA_EARPIECE) | \ - (1 << AMS_DELTA_MICROPHONE)) -#define AMS_DELTA_HANDSET ((1 << AMS_DELTA_MOUTHPIECE) | \ - (1 << AMS_DELTA_EARPIECE)) -#define AMS_DELTA_HANDSFREE ((1 << AMS_DELTA_MICROPHONE) | \ - (1 << AMS_DELTA_SPEAKER)) -#define AMS_DELTA_SPEAKERPHONE (AMS_DELTA_HANDSFREE | (1 << AMS_DELTA_AGC)) - -static const unsigned short ams_delta_audio_mode_pins[] = { - AMS_DELTA_MIXED, - AMS_DELTA_HANDSET, - AMS_DELTA_HANDSFREE, - AMS_DELTA_SPEAKERPHONE, -}; - -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) -{ - struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); - struct snd_soc_dapm_context *dapm = &card->dapm; - struct soc_enum *control = (struct soc_enum *)kcontrol->private_value; - unsigned short pins; - int pin, changed = 0; - - /* Refuse any mode changes if we are not able to control the codec. */ - if (!cx20442_codec->card->pop_time) - return -EUNATCH; - - if (ucontrol->value.enumerated.item[0] >= control->items) - return -EINVAL; - - snd_soc_dapm_mutex_lock(dapm); - - /* Translate selection to bitmap */ - pins = ams_delta_audio_mode_pins[ucontrol->value.enumerated.item[0]]; - - /* Setup pins after corresponding bits if changed */ - pin = !!(pins & (1 << AMS_DELTA_MOUTHPIECE)); - - if (pin != snd_soc_dapm_get_pin_status(dapm, "Mouthpiece")) { - changed = 1; - if (pin) - snd_soc_dapm_enable_pin_unlocked(dapm, "Mouthpiece"); - else - snd_soc_dapm_disable_pin_unlocked(dapm, "Mouthpiece"); - } - pin = !!(pins & (1 << AMS_DELTA_EARPIECE)); - if (pin != snd_soc_dapm_get_pin_status(dapm, "Earpiece")) { - changed = 1; - if (pin) - snd_soc_dapm_enable_pin_unlocked(dapm, "Earpiece"); - else - snd_soc_dapm_disable_pin_unlocked(dapm, "Earpiece"); - } - pin = !!(pins & (1 << AMS_DELTA_MICROPHONE)); - if (pin != snd_soc_dapm_get_pin_status(dapm, "Microphone")) { - changed = 1; - if (pin) - snd_soc_dapm_enable_pin_unlocked(dapm, "Microphone"); - else - snd_soc_dapm_disable_pin_unlocked(dapm, "Microphone"); - } - pin = !!(pins & (1 << AMS_DELTA_SPEAKER)); - if (pin != snd_soc_dapm_get_pin_status(dapm, "Speaker")) { - changed = 1; - if (pin) - snd_soc_dapm_enable_pin_unlocked(dapm, "Speaker"); - else - snd_soc_dapm_disable_pin_unlocked(dapm, "Speaker"); - } - pin = !!(pins & (1 << AMS_DELTA_AGC)); - if (pin != ams_delta_audio_agc) { - ams_delta_audio_agc = pin; - changed = 1; - if (pin) - snd_soc_dapm_enable_pin_unlocked(dapm, "AGCIN"); - else - snd_soc_dapm_disable_pin_unlocked(dapm, "AGCIN"); - } - - if (changed) - snd_soc_dapm_sync_unlocked(dapm); - - snd_soc_dapm_mutex_unlock(dapm); - - return changed; -} - -static int ams_delta_get_audio_mode(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); - struct snd_soc_dapm_context *dapm = &card->dapm; - unsigned short pins, mode; - - pins = ((snd_soc_dapm_get_pin_status(dapm, "Mouthpiece") << - AMS_DELTA_MOUTHPIECE) | - (snd_soc_dapm_get_pin_status(dapm, "Earpiece") << - AMS_DELTA_EARPIECE)); - if (pins) - pins |= (snd_soc_dapm_get_pin_status(dapm, "Microphone") << - AMS_DELTA_MICROPHONE); - else - pins = ((snd_soc_dapm_get_pin_status(dapm, "Microphone") << - AMS_DELTA_MICROPHONE) | - (snd_soc_dapm_get_pin_status(dapm, "Speaker") << - AMS_DELTA_SPEAKER) | - (ams_delta_audio_agc << AMS_DELTA_AGC)); - - for (mode = 0; mode < ARRAY_SIZE(ams_delta_audio_mode); mode++) - if (pins == ams_delta_audio_mode_pins[mode]) - break; - - if (mode >= ARRAY_SIZE(ams_delta_audio_mode)) - return -EINVAL; - - ucontrol->value.enumerated.item[0] = mode; - - return 0; -} - -static const SOC_ENUM_SINGLE_EXT_DECL(ams_delta_audio_enum, - ams_delta_audio_mode); - -static const struct snd_kcontrol_new ams_delta_audio_controls[] = { - SOC_ENUM_EXT("Audio Mode", ams_delta_audio_enum, - ams_delta_get_audio_mode, ams_delta_set_audio_mode), -}; - -/* Hook switch */ -static struct snd_soc_jack ams_delta_hook_switch; -static struct snd_soc_jack_gpio ams_delta_hook_switch_gpios[] = { - { - .name = "hook_switch", - .report = SND_JACK_HEADSET, - .invert = 1, - .debounce_time = 150, - } -}; - -/* 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[] = { - /* Handset */ - { - .pin = "Mouthpiece", - .mask = SND_JACK_MICROPHONE, - }, - { - .pin = "Earpiece", - .mask = SND_JACK_HEADPHONE, - }, - /* Handsfree */ - { - .pin = "Microphone", - .mask = SND_JACK_MICROPHONE, - .invert = 1, - }, - { - .pin = "Speaker", - .mask = SND_JACK_HEADPHONE, - .invert = 1, - }, -}; - - -/* - * 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) -{ - int muted; - - spin_lock(&ams_delta_lock); - cx81801_cmd_pending = 0; - muted = ams_delta_muted; - spin_unlock(&ams_delta_lock); - - /* Reconnect the codec DAI back from the modem to the CPU DAI - * only if digital mute still off */ - if (!muted) - gpiod_set_value(gpiod_modem_codec, 0); -} - -/* Line discipline .open() */ -static int cx81801_open(struct tty_struct *tty) -{ - int ret; - - if (!cx20442_codec) - return -ENODEV; - - /* - * Pass the codec structure pointer for use by other ldisc callbacks, - * both the card and the codec specific parts. - */ - tty->disc_data = cx20442_codec; - - ret = v253_ops.open(tty); - - if (ret < 0) - tty->disc_data = NULL; - - return ret; -} - -/* Line discipline .close() */ -static void cx81801_close(struct tty_struct *tty) -{ - struct snd_soc_component *component = tty->disc_data; - struct snd_soc_dapm_context *dapm = &component->card->dapm; - - del_timer_sync(&cx81801_timer); - - /* Prevent the hook switch from further changing the DAPM pins */ - INIT_LIST_HEAD(&ams_delta_hook_switch.pins); - - if (!component) - return; - - v253_ops.close(tty); - - /* Revert back to default audio input/output constellation */ - snd_soc_dapm_mutex_lock(dapm); - - snd_soc_dapm_disable_pin_unlocked(dapm, "Mouthpiece"); - snd_soc_dapm_enable_pin_unlocked(dapm, "Earpiece"); - snd_soc_dapm_enable_pin_unlocked(dapm, "Microphone"); - snd_soc_dapm_disable_pin_unlocked(dapm, "Speaker"); - snd_soc_dapm_disable_pin_unlocked(dapm, "AGCIN"); - - snd_soc_dapm_sync_unlocked(dapm); - - snd_soc_dapm_mutex_unlock(dapm); -} - -/* Line discipline .hangup() */ -static int cx81801_hangup(struct tty_struct *tty) -{ - cx81801_close(tty); - return 0; -} - -/* Line discipline .receive_buf() */ -static void cx81801_receive(struct tty_struct *tty, - const unsigned char *cp, char *fp, int count) -{ - struct snd_soc_component *component = tty->disc_data; - const unsigned char *c; - int apply, ret; - - if (!component) - return; - - if (!component->card->pop_time) { - /* First modem response, complete setup procedure */ - - /* Initialize timer used for config pulse generation */ - timer_setup(&cx81801_timer, cx81801_timeout, 0); - - v253_ops.receive_buf(tty, cp, fp, count); - - /* Link hook switch to DAPM pins */ - ret = snd_soc_jack_add_pins(&ams_delta_hook_switch, - ARRAY_SIZE(ams_delta_hook_switch_pins), - ams_delta_hook_switch_pins); - if (ret) - dev_warn(component->dev, - "Failed to link hook switch to DAPM pins, " - "will continue with hook switch unlinked.\n"); - - return; - } - - v253_ops.receive_buf(tty, cp, fp, count); - - for (c = &cp[count - 1]; c >= cp; c--) { - if (*c != '\r') - continue; - /* Complete modem response received, apply config to codec */ - - spin_lock_bh(&ams_delta_lock); - mod_timer(&cx81801_timer, jiffies + msecs_to_jiffies(150)); - apply = !ams_delta_muted && !cx81801_cmd_pending; - cx81801_cmd_pending = 1; - spin_unlock_bh(&ams_delta_lock); - - /* Apply config pulse by connecting the codec to the modem - * if not already done */ - if (apply) - gpiod_set_value(gpiod_modem_codec, 1); - break; - } -} - -/* Line discipline .write_wakeup() */ -static void cx81801_wakeup(struct tty_struct *tty) -{ - v253_ops.write_wakeup(tty); -} - -static struct tty_ldisc_ops cx81801_ops = { - .magic = TTY_LDISC_MAGIC, - .name = "cx81801", - .owner = THIS_MODULE, - .open = cx81801_open, - .close = cx81801_close, - .hangup = cx81801_hangup, - .receive_buf = cx81801_receive, - .write_wakeup = cx81801_wakeup, -}; - - -/* - * Even if not very useful, the sound card can still work without any of the - * above functonality 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 = 1; - -static int ams_delta_digital_mute(struct snd_soc_dai *dai, int mute) -{ - int apply; - - if (ams_delta_muted == mute) - return 0; - - spin_lock_bh(&ams_delta_lock); - ams_delta_muted = mute; - apply = !cx81801_cmd_pending; - spin_unlock_bh(&ams_delta_lock); - - if (apply) - gpiod_set_value(gpiod_modem_codec, !!mute); - return 0; -} - -/* Our codec DAI probably doesn't have its own .ops structure */ -static const struct snd_soc_dai_ops ams_delta_dai_ops = { - .digital_mute = ams_delta_digital_mute, -}; - -/* Will be used if the codec ever has its own digital_mute function */ -static int ams_delta_startup(struct snd_pcm_substream *substream) -{ - return ams_delta_digital_mute(NULL, 0); -} - -static void ams_delta_shutdown(struct snd_pcm_substream *substream) -{ - ams_delta_digital_mute(NULL, 1); -} - - -/* - * Card initialization - */ - -static int ams_delta_cx20442_init(struct snd_soc_pcm_runtime *rtd) -{ - struct snd_soc_dai *codec_dai = rtd->codec_dai; - struct snd_soc_card *card = rtd->card; - struct snd_soc_dapm_context *dapm = &card->dapm; - int ret; - /* Codec is ready, now add/activate board specific controls */ - - /* Store a pointer to the codec structure for tty ldisc use */ - cx20442_codec = rtd->codec_dai->component; - - /* Add hook switch - can be used to control the codec from userspace - * even if line discipline fails */ - ret = snd_soc_card_jack_new(card, "hook_switch", SND_JACK_HEADSET, - &ams_delta_hook_switch, NULL, 0); - if (ret) - dev_warn(card->dev, - "Failed to allocate resources for hook switch, " - "will continue without one.\n"); - else { - ret = snd_soc_jack_add_gpiods(card->dev, &ams_delta_hook_switch, - ARRAY_SIZE(ams_delta_hook_switch_gpios), - ams_delta_hook_switch_gpios); - if (ret) - dev_warn(card->dev, - "Failed to set up hook switch GPIO line, " - "will continue with hook switch inactive.\n"); - } - - gpiod_modem_codec = devm_gpiod_get(card->dev, "modem_codec", - GPIOD_OUT_HIGH); - if (IS_ERR(gpiod_modem_codec)) { - dev_warn(card->dev, "Failed to obtain modem_codec GPIO\n"); - return 0; - } - - /* Set up digital mute if not provided by the codec */ - if (!codec_dai->driver->ops) { - codec_dai->driver->ops = &ams_delta_dai_ops; - } else { - ams_delta_ops.startup = ams_delta_startup; - ams_delta_ops.shutdown = ams_delta_shutdown; - } - - /* Register optional line discipline for over the modem control */ - ret = tty_register_ldisc(N_V253, &cx81801_ops); - if (ret) { - dev_warn(card->dev, - "Failed to register line discipline, " - "will continue without any controls.\n"); - return 0; - } - - /* Set up initial pin constellation */ - snd_soc_dapm_disable_pin(dapm, "Mouthpiece"); - snd_soc_dapm_disable_pin(dapm, "Speaker"); - snd_soc_dapm_disable_pin(dapm, "AGCIN"); - snd_soc_dapm_disable_pin(dapm, "AGCOUT"); - - return 0; -} - -/* DAI glue - connects codec <--> CPU */ -static struct snd_soc_dai_link ams_delta_dai_link = { - .name = "CX20442", - .stream_name = "CX20442", - .cpu_dai_name = "omap-mcbsp.1", - .codec_dai_name = "cx20442-voice", - .init = ams_delta_cx20442_init, - .platform_name = "omap-mcbsp.1", - .codec_name = "cx20442-codec", - .ops = &ams_delta_ops, - .dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF | - SND_SOC_DAIFMT_CBM_CFM, -}; - -/* Audio card driver */ -static struct snd_soc_card ams_delta_audio_card = { - .name = "AMS_DELTA", - .owner = THIS_MODULE, - .dai_link = &ams_delta_dai_link, - .num_links = 1, - - .controls = ams_delta_audio_controls, - .num_controls = ARRAY_SIZE(ams_delta_audio_controls), - .dapm_widgets = ams_delta_dapm_widgets, - .num_dapm_widgets = ARRAY_SIZE(ams_delta_dapm_widgets), - .dapm_routes = ams_delta_audio_map, - .num_dapm_routes = ARRAY_SIZE(ams_delta_audio_map), -}; - -/* Module init/exit */ -static int ams_delta_probe(struct platform_device *pdev) -{ - struct snd_soc_card *card = &ams_delta_audio_card; - int ret; - - card->dev = &pdev->dev; - - ret = snd_soc_register_card(card); - if (ret) { - dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); - card->dev = NULL; - return ret; - } - return 0; -} - -static int ams_delta_remove(struct platform_device *pdev) -{ - struct snd_soc_card *card = platform_get_drvdata(pdev); - - if (tty_unregister_ldisc(N_V253) != 0) - dev_warn(&pdev->dev, - "failed to unregister V253 line discipline\n"); - - snd_soc_unregister_card(card); - card->dev = NULL; - return 0; -} - -#define DRV_NAME "ams-delta-audio" - -static struct platform_driver ams_delta_driver = { - .driver = { - .name = DRV_NAME, - }, - .probe = ams_delta_probe, - .remove = ams_delta_remove, -}; - -module_platform_driver(ams_delta_driver); - -MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>"); -MODULE_DESCRIPTION("ALSA SoC driver for Amstrad E3 (Delta) videophone"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:" DRV_NAME); |
