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-rw-r--r--include/sound/core.h1
-rw-r--r--include/sound/jack.h75
-rw-r--r--sound/core/jack.c163
3 files changed, 239 insertions, 0 deletions
diff --git a/include/sound/core.h b/include/sound/core.h
index 558b96284bd..1a4ff0bdcf6 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -63,6 +63,7 @@ typedef int __bitwise snd_device_type_t;
#define SNDRV_DEV_INFO ((__force snd_device_type_t) 0x1006)
#define SNDRV_DEV_BUS ((__force snd_device_type_t) 0x1007)
#define SNDRV_DEV_CODEC ((__force snd_device_type_t) 0x1008)
+#define SNDRV_DEV_JACK ((__force snd_device_type_t) 0x1009)
#define SNDRV_DEV_LOWLEVEL ((__force snd_device_type_t) 0x2000)
typedef int __bitwise snd_device_state_t;
diff --git a/include/sound/jack.h b/include/sound/jack.h
new file mode 100644
index 00000000000..b1b2b8b59ad
--- /dev/null
+++ b/include/sound/jack.h
@@ -0,0 +1,75 @@
+#ifndef __SOUND_JACK_H
+#define __SOUND_JACK_H
+
+/*
+ * Jack abstraction layer
+ *
+ * Copyright 2008 Wolfson Microelectronics plc
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <sound/core.h>
+
+struct input_dev;
+
+/**
+ * Jack types which can be reported. These values are used as a
+ * bitmask.
+ */
+enum snd_jack_types {
+ SND_JACK_HEADPHONE = 0x0001,
+ SND_JACK_MICROPHONE = 0x0002,
+ SND_JACK_HEADSET = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE,
+};
+
+struct snd_jack {
+ struct input_dev *input_dev;
+ int registered;
+ int type;
+ const char *id;
+ char name[100];
+};
+
+#ifdef CONFIG_SND_JACK
+
+int snd_jack_new(struct snd_card *card, const char *id, int type,
+ struct snd_jack **jack);
+void snd_jack_set_parent(struct snd_jack *jack, struct device *parent);
+
+void snd_jack_report(struct snd_jack *jack, int status);
+
+#else
+
+static inline int snd_jack_new(struct snd_card *card, const char *id, int type,
+ struct snd_jack **jack)
+{
+ return 0;
+}
+
+static inline void snd_jack_set_parent(struct snd_jack *jack,
+ struct device *parent)
+{
+}
+
+static inline void snd_jack_report(struct snd_jack *jack, int status)
+{
+}
+
+#endif
+
+#endif
diff --git a/sound/core/jack.c b/sound/core/jack.c
new file mode 100644
index 00000000000..8133a2b173a
--- /dev/null
+++ b/sound/core/jack.c
@@ -0,0 +1,163 @@
+/*
+ * Jack abstraction layer
+ *
+ * Copyright 2008 Wolfson Microelectronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/input.h>
+#include <sound/jack.h>
+#include <sound/core.h>
+
+static int snd_jack_dev_free(struct snd_device *device)
+{
+ struct snd_jack *jack = device->device_data;
+
+ /* If the input device is registered with the input subsystem
+ * then we need to use a different deallocator. */
+ if (jack->registered)
+ input_unregister_device(jack->input_dev);
+ else
+ input_free_device(jack->input_dev);
+
+ kfree(jack);
+
+ return 0;
+}
+
+static int snd_jack_dev_register(struct snd_device *device)
+{
+ struct snd_jack *jack = device->device_data;
+ struct snd_card *card = device->card;
+ int err;
+
+ snprintf(jack->name, sizeof(jack->name), "%s %s",
+ card->longname, jack->id);
+ jack->input_dev->name = jack->name;
+
+ /* Default to the sound card device. */
+ if (!jack->input_dev->dev.parent)
+ jack->input_dev->dev.parent = card->dev;
+
+ err = input_register_device(jack->input_dev);
+ if (err == 0)
+ jack->registered = 1;
+
+ return err;
+}
+
+/**
+ * snd_jack_new - Create a new jack
+ * @card: the card instance
+ * @id: an identifying string for this jack
+ * @type: a bitmask of enum snd_jack_type values that can be detected by
+ * this jack
+ * @jjack: Used to provide the allocated jack object to the caller.
+ *
+ * Creates a new jack object.
+ *
+ * Returns zero if successful, or a negative error code on failure.
+ * On success jjack will be initialised.
+ */
+int snd_jack_new(struct snd_card *card, const char *id, int type,
+ struct snd_jack **jjack)
+{
+ struct snd_jack *jack;
+ int err;
+ static struct snd_device_ops ops = {
+ .dev_free = snd_jack_dev_free,
+ .dev_register = snd_jack_dev_register,
+ };
+
+ jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
+ if (jack == NULL)
+ return -ENOMEM;
+
+ jack->id = id;
+
+ jack->input_dev = input_allocate_device();
+ if (jack->input_dev == NULL) {
+ err = -ENOMEM;
+ goto fail_input;
+ }
+
+ jack->input_dev->phys = "ALSA";
+
+ jack->type = type;
+
+ if (type & SND_JACK_HEADPHONE)
+ input_set_capability(jack->input_dev, EV_SW,
+ SW_HEADPHONE_INSERT);
+ if (type & SND_JACK_MICROPHONE)
+ input_set_capability(jack->input_dev, EV_SW,
+ SW_MICROPHONE_INSERT);
+
+ err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
+ if (err < 0)
+ goto fail_input;
+
+ *jjack = jack;
+
+ return 0;
+
+fail_input:
+ input_free_device(jack->input_dev);
+ kfree(jack);
+ return err;
+}
+EXPORT_SYMBOL(snd_jack_new);
+
+/**
+ * snd_jack_set_parent - Set the parent device for a jack
+ *
+ * @jack: The jack to configure
+ * @parent: The device to set as parent for the jack.
+ *
+ * Set the parent for the jack input device in the device tree. This
+ * function is only valid prior to registration of the jack. If no
+ * parent is configured then the parent device will be the sound card.
+ */
+void snd_jack_set_parent(struct snd_jack *jack, struct device *parent)
+{
+ WARN_ON(jack->registered);
+
+ jack->input_dev->dev.parent = parent;
+}
+EXPORT_SYMBOL(snd_jack_set_parent);
+
+/**
+ * snd_jack_report - Report the current status of a jack
+ *
+ * @jack: The jack to report status for
+ * @status: The current status of the jack
+ */
+void snd_jack_report(struct snd_jack *jack, int status)
+{
+ if (jack->type & SND_JACK_HEADPHONE)
+ input_report_switch(jack->input_dev, SW_HEADPHONE_INSERT,
+ status & SND_JACK_HEADPHONE);
+ if (jack->type & SND_JACK_MICROPHONE)
+ input_report_switch(jack->input_dev, SW_MICROPHONE_INSERT,
+ status & SND_JACK_MICROPHONE);
+
+ input_sync(jack->input_dev);
+}
+EXPORT_SYMBOL(snd_jack_report);
+
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("Jack detection support for ALSA");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 07:09:09 +0000