mirror of
https://github.com/torvalds/linux.git
synced 2024-12-06 02:52:22 +00:00
53f4654272
The previous patch adding the ability to nest struct class_device changed the paramaters to the call class_device_create(). This patch fixes up all in-kernel users of the function. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
504 lines
13 KiB
C
504 lines
13 KiB
C
/*
|
|
* Advanced Linux Sound Architecture
|
|
* 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/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/time.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <sound/core.h>
|
|
#include <sound/minors.h>
|
|
#include <sound/info.h>
|
|
#include <sound/version.h>
|
|
#include <sound/control.h>
|
|
#include <sound/initval.h>
|
|
#include <linux/kmod.h>
|
|
#include <linux/devfs_fs_kernel.h>
|
|
#include <linux/device.h>
|
|
|
|
#define SNDRV_OS_MINORS 256
|
|
|
|
static int major = CONFIG_SND_MAJOR;
|
|
int snd_major;
|
|
static int cards_limit = 1;
|
|
static int device_mode = S_IFCHR | S_IRUGO | S_IWUGO;
|
|
|
|
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
|
|
MODULE_DESCRIPTION("Advanced Linux Sound Architecture driver for soundcards.");
|
|
MODULE_LICENSE("GPL");
|
|
module_param(major, int, 0444);
|
|
MODULE_PARM_DESC(major, "Major # for sound driver.");
|
|
module_param(cards_limit, int, 0444);
|
|
MODULE_PARM_DESC(cards_limit, "Count of auto-loadable soundcards.");
|
|
#ifdef CONFIG_DEVFS_FS
|
|
module_param(device_mode, int, 0444);
|
|
MODULE_PARM_DESC(device_mode, "Device file permission mask for devfs.");
|
|
#endif
|
|
MODULE_ALIAS_CHARDEV_MAJOR(CONFIG_SND_MAJOR);
|
|
|
|
/* this one holds the actual max. card number currently available.
|
|
* as default, it's identical with cards_limit option. when more
|
|
* modules are loaded manually, this limit number increases, too.
|
|
*/
|
|
int snd_ecards_limit;
|
|
|
|
static struct list_head snd_minors_hash[SNDRV_CARDS];
|
|
|
|
static DECLARE_MUTEX(sound_mutex);
|
|
|
|
extern struct class *sound_class;
|
|
|
|
|
|
#ifdef CONFIG_KMOD
|
|
|
|
/**
|
|
* snd_request_card - try to load the card module
|
|
* @card: the card number
|
|
*
|
|
* Tries to load the module "snd-card-X" for the given card number
|
|
* via KMOD. Returns immediately if already loaded.
|
|
*/
|
|
void snd_request_card(int card)
|
|
{
|
|
int locked;
|
|
|
|
if (! current->fs->root)
|
|
return;
|
|
read_lock(&snd_card_rwlock);
|
|
locked = snd_cards_lock & (1 << card);
|
|
read_unlock(&snd_card_rwlock);
|
|
if (locked)
|
|
return;
|
|
if (card < 0 || card >= cards_limit)
|
|
return;
|
|
request_module("snd-card-%i", card);
|
|
}
|
|
|
|
static void snd_request_other(int minor)
|
|
{
|
|
char *str;
|
|
|
|
if (! current->fs->root)
|
|
return;
|
|
switch (minor) {
|
|
case SNDRV_MINOR_SEQUENCER: str = "snd-seq"; break;
|
|
case SNDRV_MINOR_TIMER: str = "snd-timer"; break;
|
|
default: return;
|
|
}
|
|
request_module(str);
|
|
}
|
|
|
|
#endif /* request_module support */
|
|
|
|
static snd_minor_t *snd_minor_search(int minor)
|
|
{
|
|
struct list_head *list;
|
|
snd_minor_t *mptr;
|
|
|
|
list_for_each(list, &snd_minors_hash[SNDRV_MINOR_CARD(minor)]) {
|
|
mptr = list_entry(list, snd_minor_t, list);
|
|
if (mptr->number == minor)
|
|
return mptr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int snd_open(struct inode *inode, struct file *file)
|
|
{
|
|
int minor = iminor(inode);
|
|
int card = SNDRV_MINOR_CARD(minor);
|
|
int dev = SNDRV_MINOR_DEVICE(minor);
|
|
snd_minor_t *mptr = NULL;
|
|
struct file_operations *old_fops;
|
|
int err = 0;
|
|
|
|
if (dev != SNDRV_MINOR_SEQUENCER && dev != SNDRV_MINOR_TIMER) {
|
|
if (snd_cards[card] == NULL) {
|
|
#ifdef CONFIG_KMOD
|
|
snd_request_card(card);
|
|
if (snd_cards[card] == NULL)
|
|
#endif
|
|
return -ENODEV;
|
|
}
|
|
} else {
|
|
#ifdef CONFIG_KMOD
|
|
if ((mptr = snd_minor_search(minor)) == NULL)
|
|
snd_request_other(minor);
|
|
#endif
|
|
}
|
|
if (mptr == NULL && (mptr = snd_minor_search(minor)) == NULL)
|
|
return -ENODEV;
|
|
old_fops = file->f_op;
|
|
file->f_op = fops_get(mptr->f_ops);
|
|
if (file->f_op->open)
|
|
err = file->f_op->open(inode, file);
|
|
if (err) {
|
|
fops_put(file->f_op);
|
|
file->f_op = fops_get(old_fops);
|
|
}
|
|
fops_put(old_fops);
|
|
return err;
|
|
}
|
|
|
|
static struct file_operations snd_fops =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.open = snd_open
|
|
};
|
|
|
|
static int snd_kernel_minor(int type, snd_card_t * card, int dev)
|
|
{
|
|
int minor;
|
|
|
|
switch (type) {
|
|
case SNDRV_DEVICE_TYPE_SEQUENCER:
|
|
case SNDRV_DEVICE_TYPE_TIMER:
|
|
minor = type;
|
|
break;
|
|
case SNDRV_DEVICE_TYPE_CONTROL:
|
|
snd_assert(card != NULL, return -EINVAL);
|
|
minor = SNDRV_MINOR(card->number, type);
|
|
break;
|
|
case SNDRV_DEVICE_TYPE_HWDEP:
|
|
case SNDRV_DEVICE_TYPE_RAWMIDI:
|
|
case SNDRV_DEVICE_TYPE_PCM_PLAYBACK:
|
|
case SNDRV_DEVICE_TYPE_PCM_CAPTURE:
|
|
snd_assert(card != NULL, return -EINVAL);
|
|
minor = SNDRV_MINOR(card->number, type + dev);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL);
|
|
return minor;
|
|
}
|
|
|
|
/**
|
|
* snd_register_device - Register the ALSA device file for the card
|
|
* @type: the device type, SNDRV_DEVICE_TYPE_XXX
|
|
* @card: the card instance
|
|
* @dev: the device index
|
|
* @reg: the snd_minor_t record
|
|
* @name: the device file name
|
|
*
|
|
* Registers an ALSA device file for the given card.
|
|
* The operators have to be set in reg parameter.
|
|
*
|
|
* Retrurns zero if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_register_device(int type, snd_card_t * card, int dev, snd_minor_t * reg, const char *name)
|
|
{
|
|
int minor = snd_kernel_minor(type, card, dev);
|
|
snd_minor_t *preg;
|
|
struct device *device = NULL;
|
|
|
|
if (minor < 0)
|
|
return minor;
|
|
snd_assert(name, return -EINVAL);
|
|
preg = (snd_minor_t *)kmalloc(sizeof(snd_minor_t) + strlen(name) + 1, GFP_KERNEL);
|
|
if (preg == NULL)
|
|
return -ENOMEM;
|
|
*preg = *reg;
|
|
preg->number = minor;
|
|
preg->device = dev;
|
|
strcpy(preg->name, name);
|
|
down(&sound_mutex);
|
|
if (snd_minor_search(minor)) {
|
|
up(&sound_mutex);
|
|
kfree(preg);
|
|
return -EBUSY;
|
|
}
|
|
list_add_tail(&preg->list, &snd_minors_hash[SNDRV_MINOR_CARD(minor)]);
|
|
if (strncmp(name, "controlC", 8) || card->number >= cards_limit)
|
|
devfs_mk_cdev(MKDEV(major, minor), S_IFCHR | device_mode, "snd/%s", name);
|
|
if (card)
|
|
device = card->dev;
|
|
class_device_create(sound_class, NULL, MKDEV(major, minor), device, "%s", name);
|
|
|
|
up(&sound_mutex);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_unregister_device - unregister the device on the given card
|
|
* @type: the device type, SNDRV_DEVICE_TYPE_XXX
|
|
* @card: the card instance
|
|
* @dev: the device index
|
|
*
|
|
* Unregisters the device file already registered via
|
|
* snd_register_device().
|
|
*
|
|
* Returns zero if sucecessful, or a negative error code on failure
|
|
*/
|
|
int snd_unregister_device(int type, snd_card_t * card, int dev)
|
|
{
|
|
int minor = snd_kernel_minor(type, card, dev);
|
|
snd_minor_t *mptr;
|
|
|
|
if (minor < 0)
|
|
return minor;
|
|
down(&sound_mutex);
|
|
if ((mptr = snd_minor_search(minor)) == NULL) {
|
|
up(&sound_mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (strncmp(mptr->name, "controlC", 8) || card->number >= cards_limit) /* created in sound.c */
|
|
devfs_remove("snd/%s", mptr->name);
|
|
class_device_destroy(sound_class, MKDEV(major, minor));
|
|
|
|
list_del(&mptr->list);
|
|
up(&sound_mutex);
|
|
kfree(mptr);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* INFO PART
|
|
*/
|
|
|
|
static snd_info_entry_t *snd_minor_info_entry = NULL;
|
|
|
|
static void snd_minor_info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
|
|
{
|
|
int card, device;
|
|
struct list_head *list;
|
|
snd_minor_t *mptr;
|
|
|
|
down(&sound_mutex);
|
|
for (card = 0; card < SNDRV_CARDS; card++) {
|
|
list_for_each(list, &snd_minors_hash[card]) {
|
|
mptr = list_entry(list, snd_minor_t, list);
|
|
if (SNDRV_MINOR_DEVICE(mptr->number) != SNDRV_MINOR_SEQUENCER) {
|
|
if ((device = mptr->device) >= 0)
|
|
snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, device, mptr->comment);
|
|
else
|
|
snd_iprintf(buffer, "%3i: [%i] : %s\n", mptr->number, card, mptr->comment);
|
|
} else {
|
|
snd_iprintf(buffer, "%3i: : %s\n", mptr->number, mptr->comment);
|
|
}
|
|
}
|
|
}
|
|
up(&sound_mutex);
|
|
}
|
|
|
|
int __init snd_minor_info_init(void)
|
|
{
|
|
snd_info_entry_t *entry;
|
|
|
|
entry = snd_info_create_module_entry(THIS_MODULE, "devices", NULL);
|
|
if (entry) {
|
|
entry->c.text.read_size = PAGE_SIZE;
|
|
entry->c.text.read = snd_minor_info_read;
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
snd_minor_info_entry = entry;
|
|
return 0;
|
|
}
|
|
|
|
int __exit snd_minor_info_done(void)
|
|
{
|
|
if (snd_minor_info_entry)
|
|
snd_info_unregister(snd_minor_info_entry);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* INIT PART
|
|
*/
|
|
|
|
#ifdef CONFIG_SND_GENERIC_DRIVER
|
|
extern struct device_driver snd_generic_driver;
|
|
#endif
|
|
|
|
static int __init alsa_sound_init(void)
|
|
{
|
|
short controlnum;
|
|
int err;
|
|
int card;
|
|
|
|
snd_major = major;
|
|
snd_ecards_limit = cards_limit;
|
|
for (card = 0; card < SNDRV_CARDS; card++)
|
|
INIT_LIST_HEAD(&snd_minors_hash[card]);
|
|
if ((err = snd_oss_init_module()) < 0)
|
|
return err;
|
|
devfs_mk_dir("snd");
|
|
if (register_chrdev(major, "alsa", &snd_fops)) {
|
|
snd_printk(KERN_ERR "unable to register native major device number %d\n", major);
|
|
devfs_remove("snd");
|
|
return -EIO;
|
|
}
|
|
snd_memory_init();
|
|
if (snd_info_init() < 0) {
|
|
snd_memory_done();
|
|
unregister_chrdev(major, "alsa");
|
|
devfs_remove("snd");
|
|
return -ENOMEM;
|
|
}
|
|
snd_info_minor_register();
|
|
#ifdef CONFIG_SND_GENERIC_DRIVER
|
|
driver_register(&snd_generic_driver);
|
|
#endif
|
|
for (controlnum = 0; controlnum < cards_limit; controlnum++)
|
|
devfs_mk_cdev(MKDEV(major, controlnum<<5), S_IFCHR | device_mode, "snd/controlC%d", controlnum);
|
|
#ifndef MODULE
|
|
printk(KERN_INFO "Advanced Linux Sound Architecture Driver Version " CONFIG_SND_VERSION CONFIG_SND_DATE ".\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alsa_sound_exit(void)
|
|
{
|
|
short controlnum;
|
|
|
|
for (controlnum = 0; controlnum < cards_limit; controlnum++)
|
|
devfs_remove("snd/controlC%d", controlnum);
|
|
|
|
#ifdef CONFIG_SND_GENERIC_DRIVER
|
|
driver_unregister(&snd_generic_driver);
|
|
#endif
|
|
snd_info_minor_unregister();
|
|
snd_info_done();
|
|
snd_memory_done();
|
|
if (unregister_chrdev(major, "alsa") != 0)
|
|
snd_printk(KERN_ERR "unable to unregister major device number %d\n", major);
|
|
devfs_remove("snd");
|
|
}
|
|
|
|
module_init(alsa_sound_init)
|
|
module_exit(alsa_sound_exit)
|
|
|
|
/* sound.c */
|
|
EXPORT_SYMBOL(snd_major);
|
|
EXPORT_SYMBOL(snd_ecards_limit);
|
|
#if defined(CONFIG_KMOD)
|
|
EXPORT_SYMBOL(snd_request_card);
|
|
#endif
|
|
EXPORT_SYMBOL(snd_register_device);
|
|
EXPORT_SYMBOL(snd_unregister_device);
|
|
#if defined(CONFIG_SND_OSSEMUL)
|
|
EXPORT_SYMBOL(snd_register_oss_device);
|
|
EXPORT_SYMBOL(snd_unregister_oss_device);
|
|
#endif
|
|
/* memory.c */
|
|
#ifdef CONFIG_SND_DEBUG_MEMORY
|
|
EXPORT_SYMBOL(snd_hidden_kmalloc);
|
|
EXPORT_SYMBOL(snd_hidden_kcalloc);
|
|
EXPORT_SYMBOL(snd_hidden_kfree);
|
|
EXPORT_SYMBOL(snd_hidden_vmalloc);
|
|
EXPORT_SYMBOL(snd_hidden_vfree);
|
|
EXPORT_SYMBOL(snd_hidden_kstrdup);
|
|
#endif
|
|
EXPORT_SYMBOL(copy_to_user_fromio);
|
|
EXPORT_SYMBOL(copy_from_user_toio);
|
|
/* init.c */
|
|
EXPORT_SYMBOL(snd_cards);
|
|
#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
|
|
EXPORT_SYMBOL(snd_mixer_oss_notify_callback);
|
|
#endif
|
|
EXPORT_SYMBOL(snd_card_new);
|
|
EXPORT_SYMBOL(snd_card_disconnect);
|
|
EXPORT_SYMBOL(snd_card_free);
|
|
EXPORT_SYMBOL(snd_card_free_in_thread);
|
|
EXPORT_SYMBOL(snd_card_register);
|
|
EXPORT_SYMBOL(snd_component_add);
|
|
EXPORT_SYMBOL(snd_card_file_add);
|
|
EXPORT_SYMBOL(snd_card_file_remove);
|
|
#ifdef CONFIG_SND_GENERIC_DRIVER
|
|
EXPORT_SYMBOL(snd_card_set_generic_dev);
|
|
#endif
|
|
#ifdef CONFIG_PM
|
|
EXPORT_SYMBOL(snd_power_wait);
|
|
EXPORT_SYMBOL(snd_card_set_pm_callback);
|
|
#ifdef CONFIG_SND_GENERIC_DRIVER
|
|
EXPORT_SYMBOL(snd_card_set_generic_pm_callback);
|
|
#endif
|
|
#ifdef CONFIG_PCI
|
|
EXPORT_SYMBOL(snd_card_pci_suspend);
|
|
EXPORT_SYMBOL(snd_card_pci_resume);
|
|
#endif
|
|
#endif
|
|
/* device.c */
|
|
EXPORT_SYMBOL(snd_device_new);
|
|
EXPORT_SYMBOL(snd_device_register);
|
|
EXPORT_SYMBOL(snd_device_free);
|
|
/* isadma.c */
|
|
#ifdef CONFIG_ISA_DMA_API
|
|
EXPORT_SYMBOL(snd_dma_program);
|
|
EXPORT_SYMBOL(snd_dma_disable);
|
|
EXPORT_SYMBOL(snd_dma_pointer);
|
|
#endif
|
|
/* info.c */
|
|
#ifdef CONFIG_PROC_FS
|
|
EXPORT_SYMBOL(snd_seq_root);
|
|
EXPORT_SYMBOL(snd_iprintf);
|
|
EXPORT_SYMBOL(snd_info_get_line);
|
|
EXPORT_SYMBOL(snd_info_get_str);
|
|
EXPORT_SYMBOL(snd_info_create_module_entry);
|
|
EXPORT_SYMBOL(snd_info_create_card_entry);
|
|
EXPORT_SYMBOL(snd_info_free_entry);
|
|
EXPORT_SYMBOL(snd_info_register);
|
|
EXPORT_SYMBOL(snd_info_unregister);
|
|
EXPORT_SYMBOL(snd_card_proc_new);
|
|
#endif
|
|
/* info_oss.c */
|
|
#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
|
|
EXPORT_SYMBOL(snd_oss_info_register);
|
|
#endif
|
|
/* control.c */
|
|
EXPORT_SYMBOL(snd_ctl_new);
|
|
EXPORT_SYMBOL(snd_ctl_new1);
|
|
EXPORT_SYMBOL(snd_ctl_free_one);
|
|
EXPORT_SYMBOL(snd_ctl_add);
|
|
EXPORT_SYMBOL(snd_ctl_remove);
|
|
EXPORT_SYMBOL(snd_ctl_remove_id);
|
|
EXPORT_SYMBOL(snd_ctl_rename_id);
|
|
EXPORT_SYMBOL(snd_ctl_find_numid);
|
|
EXPORT_SYMBOL(snd_ctl_find_id);
|
|
EXPORT_SYMBOL(snd_ctl_notify);
|
|
EXPORT_SYMBOL(snd_ctl_register_ioctl);
|
|
EXPORT_SYMBOL(snd_ctl_unregister_ioctl);
|
|
#ifdef CONFIG_COMPAT
|
|
EXPORT_SYMBOL(snd_ctl_register_ioctl_compat);
|
|
EXPORT_SYMBOL(snd_ctl_unregister_ioctl_compat);
|
|
#endif
|
|
EXPORT_SYMBOL(snd_ctl_elem_read);
|
|
EXPORT_SYMBOL(snd_ctl_elem_write);
|
|
/* misc.c */
|
|
EXPORT_SYMBOL(snd_task_name);
|
|
#ifdef CONFIG_SND_VERBOSE_PRINTK
|
|
EXPORT_SYMBOL(snd_verbose_printk);
|
|
#endif
|
|
#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK)
|
|
EXPORT_SYMBOL(snd_verbose_printd);
|
|
#endif
|
|
/* wrappers */
|
|
#ifdef CONFIG_SND_DEBUG_MEMORY
|
|
EXPORT_SYMBOL(snd_wrapper_kmalloc);
|
|
EXPORT_SYMBOL(snd_wrapper_kfree);
|
|
EXPORT_SYMBOL(snd_wrapper_vmalloc);
|
|
EXPORT_SYMBOL(snd_wrapper_vfree);
|
|
#endif
|