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2678f60d2b
Currently the jack layer refers to card->longname as a part of its input device name string. However, longname is often really long and way too ugly as an identifier, such as, "HDA Intel at 0xf8400000 irq 21". This patch changes the code to use card->shortname instead. The shortname string contains usually the h/w vendor and product names but without messy I/O port or IRQ numbers. Signed-off-by: Takashi Iwai <tiwai@suse.de>
180 lines
4.8 KiB
C
180 lines
4.8 KiB
C
/*
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* Jack abstraction layer
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*
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* Copyright 2008 Wolfson Microelectronics
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/input.h>
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#include <sound/jack.h>
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#include <sound/core.h>
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static int snd_jack_dev_free(struct snd_device *device)
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{
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struct snd_jack *jack = device->device_data;
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/* If the input device is registered with the input subsystem
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* then we need to use a different deallocator. */
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if (jack->registered)
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input_unregister_device(jack->input_dev);
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else
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input_free_device(jack->input_dev);
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kfree(jack->id);
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kfree(jack);
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return 0;
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}
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static int snd_jack_dev_register(struct snd_device *device)
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{
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struct snd_jack *jack = device->device_data;
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struct snd_card *card = device->card;
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int err;
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snprintf(jack->name, sizeof(jack->name), "%s %s",
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card->shortname, jack->id);
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jack->input_dev->name = jack->name;
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/* Default to the sound card device. */
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if (!jack->input_dev->dev.parent)
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jack->input_dev->dev.parent = card->dev;
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err = input_register_device(jack->input_dev);
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if (err == 0)
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jack->registered = 1;
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return err;
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}
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/**
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* snd_jack_new - Create a new jack
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* @card: the card instance
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* @id: an identifying string for this jack
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* @type: a bitmask of enum snd_jack_type values that can be detected by
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* this jack
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* @jjack: Used to provide the allocated jack object to the caller.
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*
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* Creates a new jack object.
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*
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* Returns zero if successful, or a negative error code on failure.
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* On success jjack will be initialised.
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*/
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int snd_jack_new(struct snd_card *card, const char *id, int type,
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struct snd_jack **jjack)
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{
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struct snd_jack *jack;
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int err;
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static struct snd_device_ops ops = {
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.dev_free = snd_jack_dev_free,
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.dev_register = snd_jack_dev_register,
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};
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jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
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if (jack == NULL)
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return -ENOMEM;
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jack->id = kstrdup(id, GFP_KERNEL);
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jack->input_dev = input_allocate_device();
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if (jack->input_dev == NULL) {
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err = -ENOMEM;
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goto fail_input;
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}
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jack->input_dev->phys = "ALSA";
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jack->type = type;
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if (type & SND_JACK_HEADPHONE)
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input_set_capability(jack->input_dev, EV_SW,
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SW_HEADPHONE_INSERT);
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if (type & SND_JACK_LINEOUT)
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input_set_capability(jack->input_dev, EV_SW,
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SW_LINEOUT_INSERT);
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if (type & SND_JACK_MICROPHONE)
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input_set_capability(jack->input_dev, EV_SW,
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SW_MICROPHONE_INSERT);
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if (type & SND_JACK_MECHANICAL)
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input_set_capability(jack->input_dev, EV_SW,
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SW_JACK_PHYSICAL_INSERT);
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err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
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if (err < 0)
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goto fail_input;
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*jjack = jack;
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return 0;
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fail_input:
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input_free_device(jack->input_dev);
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kfree(jack);
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return err;
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}
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EXPORT_SYMBOL(snd_jack_new);
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/**
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* snd_jack_set_parent - Set the parent device for a jack
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*
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* @jack: The jack to configure
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* @parent: The device to set as parent for the jack.
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*
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* Set the parent for the jack input device in the device tree. This
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* function is only valid prior to registration of the jack. If no
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* parent is configured then the parent device will be the sound card.
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*/
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void snd_jack_set_parent(struct snd_jack *jack, struct device *parent)
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{
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WARN_ON(jack->registered);
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jack->input_dev->dev.parent = parent;
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}
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EXPORT_SYMBOL(snd_jack_set_parent);
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/**
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* snd_jack_report - Report the current status of a jack
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*
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* @jack: The jack to report status for
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* @status: The current status of the jack
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*/
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void snd_jack_report(struct snd_jack *jack, int status)
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{
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if (!jack)
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return;
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if (jack->type & SND_JACK_HEADPHONE)
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input_report_switch(jack->input_dev, SW_HEADPHONE_INSERT,
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status & SND_JACK_HEADPHONE);
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if (jack->type & SND_JACK_LINEOUT)
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input_report_switch(jack->input_dev, SW_LINEOUT_INSERT,
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status & SND_JACK_LINEOUT);
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if (jack->type & SND_JACK_MICROPHONE)
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input_report_switch(jack->input_dev, SW_MICROPHONE_INSERT,
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status & SND_JACK_MICROPHONE);
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if (jack->type & SND_JACK_MECHANICAL)
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input_report_switch(jack->input_dev, SW_JACK_PHYSICAL_INSERT,
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status & SND_JACK_MECHANICAL);
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input_sync(jack->input_dev);
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}
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EXPORT_SYMBOL(snd_jack_report);
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MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
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MODULE_DESCRIPTION("Jack detection support for ALSA");
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MODULE_LICENSE("GPL");
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