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-rw-r--r--sound/core/Kconfig6
-rw-r--r--sound/core/Makefile1
-rw-r--r--sound/core/jack.c163
-rw-r--r--sound/core/pcm.c50
-rw-r--r--sound/core/sound.c2
5 files changed, 207 insertions, 15 deletions
diff --git a/sound/core/Kconfig b/sound/core/Kconfig
index 335d45ecde6a..9c4da1cd4a6b 100644
--- a/sound/core/Kconfig
+++ b/sound/core/Kconfig
@@ -12,6 +12,12 @@ config SND_HWDEP
config SND_RAWMIDI
tristate
+# To be effective this also requires INPUT - users should say:
+# select SND_JACK if INPUT=y || INPUT=SND
+# to avoid having to force INPUT on.
+config SND_JACK
+ bool
+
config SND_SEQUENCER
tristate "Sequencer support"
select SND_TIMER
diff --git a/sound/core/Makefile b/sound/core/Makefile
index da8e685eef9c..d57125a5687d 100644
--- a/sound/core/Makefile
+++ b/sound/core/Makefile
@@ -7,6 +7,7 @@ snd-y := sound.o init.o memory.o info.o control.o misc.o device.o
snd-$(CONFIG_ISA_DMA_API) += isadma.o
snd-$(CONFIG_SND_OSSEMUL) += sound_oss.o info_oss.o
snd-$(CONFIG_SND_VMASTER) += vmaster.o
+snd-$(CONFIG_SND_JACK) += jack.o
snd-pcm-objs := pcm.o pcm_native.o pcm_lib.o pcm_timer.o pcm_misc.o \
pcm_memory.o
diff --git a/sound/core/jack.c b/sound/core/jack.c
new file mode 100644
index 000000000000..8133a2b173a5
--- /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");
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 9dd9bc73fe1d..4c6facb62892 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -42,7 +42,7 @@ static int snd_pcm_dev_free(struct snd_device *device);
static int snd_pcm_dev_register(struct snd_device *device);
static int snd_pcm_dev_disconnect(struct snd_device *device);
-static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
+static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
{
struct snd_pcm *pcm;
@@ -53,6 +53,37 @@ static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
return NULL;
}
+static int snd_pcm_next(struct snd_card *card, int device)
+{
+ struct snd_pcm *pcm;
+
+ list_for_each_entry(pcm, &snd_pcm_devices, list) {
+ if (pcm->card == card && pcm->device > device)
+ return pcm->device;
+ else if (pcm->card->number > card->number)
+ return -1;
+ }
+ return -1;
+}
+
+static int snd_pcm_add(struct snd_pcm *newpcm)
+{
+ struct snd_pcm *pcm;
+
+ list_for_each_entry(pcm, &snd_pcm_devices, list) {
+ if (pcm->card == newpcm->card && pcm->device == newpcm->device)
+ return -EBUSY;
+ if (pcm->card->number > newpcm->card->number ||
+ (pcm->card == newpcm->card &&
+ pcm->device > newpcm->device)) {
+ list_add(&newpcm->list, pcm->list.prev);
+ return 0;
+ }
+ }
+ list_add_tail(&newpcm->list, &snd_pcm_devices);
+ return 0;
+}
+
static int snd_pcm_control_ioctl(struct snd_card *card,
struct snd_ctl_file *control,
unsigned int cmd, unsigned long arg)
@@ -65,14 +96,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
if (get_user(device, (int __user *)arg))
return -EFAULT;
mutex_lock(&register_mutex);
- device = device < 0 ? 0 : device + 1;
- while (device < SNDRV_PCM_DEVICES) {
- if (snd_pcm_search(card, device))
- break;
- device++;
- }
- if (device == SNDRV_PCM_DEVICES)
- device = -1;
+ device = snd_pcm_next(card, device);
mutex_unlock(&register_mutex);
if (put_user(device, (int __user *)arg))
return -EFAULT;
@@ -98,7 +122,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
if (get_user(subdevice, &info->subdevice))
return -EFAULT;
mutex_lock(&register_mutex);
- pcm = snd_pcm_search(card, device);
+ pcm = snd_pcm_get(card, device);
if (pcm == NULL) {
err = -ENXIO;
goto _error;
@@ -931,11 +955,11 @@ static int snd_pcm_dev_register(struct snd_device *device)
snd_assert(pcm != NULL && device != NULL, return -ENXIO);
mutex_lock(&register_mutex);
- if (snd_pcm_search(pcm->card, pcm->device)) {
+ err = snd_pcm_add(pcm);
+ if (err) {
mutex_unlock(&register_mutex);
- return -EBUSY;
+ return err;
}
- list_add_tail(&pcm->list, &snd_pcm_devices);
for (cidx = 0; cidx < 2; cidx++) {
int devtype = -1;
if (pcm->streams[cidx].substream == NULL)
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 1003ae375d47..838dd9ee957c 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -34,8 +34,6 @@
#include <linux/kmod.h>
#include <linux/mutex.h>
-#define SNDRV_OS_MINORS 256
-
static int major = CONFIG_SND_MAJOR;
int snd_major;
EXPORT_SYMBOL(snd_major);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-13 01:04:26 +0000