| /* |
| * 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 |
| * |
| */ |
| |
| #define __NO_VERSION__ |
| #include <sound/driver.h> |
| #include <linux/slab.h> |
| #include <linux/time.h> |
| #include <sound/core.h> |
| |
| 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 = (snd_device_t *) snd_magic_kcalloc(snd_device_t, 0, 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; |
| } |
| |
| 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->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"); |
| } |
| } |
| snd_magic_kfree(dev); |
| return 0; |
| } |
| snd_printd("device free %p (from %p), not found\n", device_data, __builtin_return_address(0)); |
| return -ENXIO; |
| } |
| |
| 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; |
| } |
| |
| 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; |
| } |
| |
| int snd_device_free_all(snd_card_t *card, snd_device_cmd_t cmd) |
| { |
| snd_device_t *dev; |
| struct list_head *list; |
| int err, 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; |
| } |