Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 240 insertions, 0 deletions

diff --git a/sound/core/device.c b/sound/core/device.c
new file mode 100644
index 000000000000..18c71f913d2a
--- /dev/null
+++ b/sound/core/device.c
@@ -0,0 +1,240 @@
+/*
+ *  Device management routines
+ *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *
+ *
+ *   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/driver.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/errno.h>
+#include <sound/core.h>
+
+/**
+ * snd_device_new - create an ALSA device component
+ * @card: the card instance
+ * @type: the device type, SNDRV_DEV_TYPE_XXX
+ * @device_data: the data pointer of this device
+ * @ops: the operator table
+ *
+ * Creates a new device component for the given data pointer.
+ * The device will be assigned to the card and managed together
+ * by the card.
+ *
+ * The data pointer plays a role as the identifier, too, so the
+ * pointer address must be unique and unchanged.
+ *
+ * Returns zero if successful, or a negative error code on failure.
+ */
+int snd_device_new(snd_card_t *card, snd_device_type_t type,
+                   void *device_data, snd_device_ops_t *ops)
+{
+        snd_device_t *dev;
+
+        snd_assert(card != NULL && device_data != NULL && ops != NULL, return -ENXIO);
+        dev = kcalloc(1, sizeof(*dev), GFP_KERNEL);
+        if (dev == NULL)
+                return -ENOMEM;
+        dev->card = card;
+        dev->type = type;
+        dev->state = SNDRV_DEV_BUILD;
+        dev->device_data = device_data;
+        dev->ops = ops;
+        list_add(&dev->list, &card->devices);   /* add to the head of list */
+        return 0;
+}
+
+/**
+ * snd_device_free - release the device from the card
+ * @card: the card instance
+ * @device_data: the data pointer to release
+ *
+ * Removes the device from the list on the card and invokes the
+ * callback, dev_unregister or dev_free, corresponding to the state.
+ * Then release the device.
+ *
+ * Returns zero if successful, or a negative error code on failure or if the
+ * device not found.
+ */
+int snd_device_free(snd_card_t *card, void *device_data)
+{
+        struct list_head *list;
+        snd_device_t *dev;
+        
+        snd_assert(card != NULL, return -ENXIO);
+        snd_assert(device_data != NULL, return -ENXIO);
+        list_for_each(list, &card->devices) {
+                dev = snd_device(list);
+                if (dev->device_data != device_data)
+                        continue;
+                /* unlink */
+                list_del(&dev->list);
+                if ((dev->state == SNDRV_DEV_REGISTERED || dev->state == SNDRV_DEV_DISCONNECTED) &&
+                    dev->ops->dev_unregister) {
+                        if (dev->ops->dev_unregister(dev))
+                                snd_printk(KERN_ERR "device unregister failure\n");
+                } else {
+                        if (dev->ops->dev_free) {
+                                if (dev->ops->dev_free(dev))
+                                        snd_printk(KERN_ERR "device free failure\n");
+                        }
+                }
+                kfree(dev);
+                return 0;
+        }
+        snd_printd("device free %p (from %p), not found\n", device_data, __builtin_return_address(0));
+        return -ENXIO;
+}
+
+/**
+ * snd_device_free - disconnect the device
+ * @card: the card instance
+ * @device_data: the data pointer to disconnect
+ *
+ * Turns the device into the disconnection state, invoking
+ * dev_disconnect callback, if the device was already registered.
+ *
+ * Usually called from snd_card_disconnect().
+ *
+ * Returns zero if successful, or a negative error code on failure or if the
+ * device not found.
+ */
+int snd_device_disconnect(snd_card_t *card, void *device_data)
+{
+        struct list_head *list;
+        snd_device_t *dev;
+        
+        snd_assert(card != NULL, return -ENXIO);
+        snd_assert(device_data != NULL, return -ENXIO);
+        list_for_each(list, &card->devices) {
+                dev = snd_device(list);
+                if (dev->device_data != device_data)
+                        continue;
+                if (dev->state == SNDRV_DEV_REGISTERED && dev->ops->dev_disconnect) {
+                        if (dev->ops->dev_disconnect(dev))
+                                snd_printk(KERN_ERR "device disconnect failure\n");
+                        dev->state = SNDRV_DEV_DISCONNECTED;
+                }
+                return 0;
+        }
+        snd_printd("device disconnect %p (from %p), not found\n", device_data, __builtin_return_address(0));
+        return -ENXIO;
+}
+
+/**
+ * snd_device_register - register the device
+ * @card: the card instance
+ * @device_data: the data pointer to register
+ *
+ * Registers the device which was already created via
+ * snd_device_new().  Usually this is called from snd_card_register(),
+ * but it can be called later if any new devices are created after
+ * invocation of snd_card_register().
+ *
+ * Returns zero if successful, or a negative error code on failure or if the
+ * device not found.
+ */
+int snd_device_register(snd_card_t *card, void *device_data)
+{
+        struct list_head *list;
+        snd_device_t *dev;
+        int err;
+        
+        snd_assert(card != NULL && device_data != NULL, return -ENXIO);
+        list_for_each(list, &card->devices) {
+                dev = snd_device(list);
+                if (dev->device_data != device_data)
+                        continue;
+                if (dev->state == SNDRV_DEV_BUILD && dev->ops->dev_register) {
+                        if ((err = dev->ops->dev_register(dev)) < 0)
+                                return err;
+                        dev->state = SNDRV_DEV_REGISTERED;
+                        return 0;
+                }
+                return -EBUSY;
+        }
+        snd_BUG();
+        return -ENXIO;
+}
+
+/*
+ * register all the devices on the card.
+ * called from init.c
+ */
+int snd_device_register_all(snd_card_t *card)
+{
+        struct list_head *list;
+        snd_device_t *dev;
+        int err;
+        
+        snd_assert(card != NULL, return -ENXIO);
+        list_for_each(list, &card->devices) {
+                dev = snd_device(list);
+                if (dev->state == SNDRV_DEV_BUILD && dev->ops->dev_register) {
+                        if ((err = dev->ops->dev_register(dev)) < 0)
+                                return err;
+                        dev->state = SNDRV_DEV_REGISTERED;
+                }
+        }
+        return 0;
+}
+
+/*
+ * disconnect all the devices on the card.
+ * called from init.c
+ */
+int snd_device_disconnect_all(snd_card_t *card)
+{
+        snd_device_t *dev;
+        struct list_head *list;
+        int err = 0;
+
+        snd_assert(card != NULL, return -ENXIO);
+        list_for_each(list, &card->devices) {
+                dev = snd_device(list);
+                if (snd_device_disconnect(card, dev->device_data) < 0)
+                        err = -ENXIO;
+        }
+        return err;
+}
+
+/*
+ * release all the devices on the card.
+ * called from init.c
+ */
+int snd_device_free_all(snd_card_t *card, snd_device_cmd_t cmd)
+{
+        snd_device_t *dev;
+        struct list_head *list;
+        int err;
+        unsigned int range_low, range_high;
+
+        snd_assert(card != NULL, return -ENXIO);
+        range_low = cmd * SNDRV_DEV_TYPE_RANGE_SIZE;
+        range_high = range_low + SNDRV_DEV_TYPE_RANGE_SIZE - 1;
+      __again:
+        list_for_each(list, &card->devices) {
+                dev = snd_device(list);         
+                if (dev->type >= range_low && dev->type <= range_high) {
+                        if ((err = snd_device_free(card, dev->device_data)) < 0)
+                                return err;
+                        goto __again;
+                }
+        }
+        return 0;
+}