Commit d80f19fa authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

Driver core: convert sound core to use struct device 



Converts from using struct "class_device" to "struct device" making
everything show up properly in /sys/devices/ with symlinks from the
/sys/class directory.

It also makes the struct sound_card to show up as a "real" device
where all the different sound class devices are placed as childs
and different card attribute files can hang off of. /sys/class/sound is
still a flat directory, but the symlink targets of all devices belonging
to the same card, point the the /sys/devices tree below the new card
device object.

Thanks to Kay for the updates to this patch.

Signed-off-by: default avatarKay Sievers <kay.sievers@novell.com>
Acked-by: default avatarJaroslav Kysela <perex@suse.cz>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent ebf644c4

include/sound/core.h

+5 −3
Original line number Diff line number Diff line
@@ -132,6 +132,7 @@ struct snd_card { 
	int shutdown;			/* this card is going down */

	int free_on_last_close;		/* free in context of file_release */

	wait_queue_head_t shutdown_sleep;

	struct device *parent;

	struct device *dev;



#ifdef CONFIG_PM
@@ -187,13 +188,14 @@ struct snd_minor { 
	int device;			/* device number */

	const struct file_operations *f_ops;	/* file operations */

	void *private_data;		/* private data for f_ops->open */

	struct class_device *class_dev;	/* class device for sysfs */

	struct device *dev;		/* device for sysfs */

};



/* sound.c */



extern int snd_major;

extern int snd_ecards_limit;

extern struct class *sound_class;



void snd_request_card(int card);
@@ -203,7 +205,7 @@ int snd_register_device(int type, struct snd_card *card, int dev, 
int snd_unregister_device(int type, struct snd_card *card, int dev);

void *snd_lookup_minor_data(unsigned int minor, int type);

int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev,

			      const struct class_device_attribute *attr);

			      struct device_attribute *attr);



#ifdef CONFIG_SND_OSSEMUL

int snd_register_oss_device(int type, struct snd_card *card, int dev,
@@ -255,7 +257,7 @@ int snd_card_file_add(struct snd_card *card, struct file *file); 
int snd_card_file_remove(struct snd_card *card, struct file *file);



#ifndef snd_card_set_dev

#define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))

#define snd_card_set_dev(card,devptr) ((card)->parent = (devptr))

#endif



/* device.c */

sound/core/init.c

+8 −0
Original line number Diff line number Diff line
@@ -361,6 +361,8 @@ static int snd_card_do_free(struct snd_card *card) 
		snd_printk(KERN_WARNING "unable to free card info\n");

		/* Not fatal error */

	}

	if (card->dev)

		device_unregister(card->dev);

	kfree(card);

	return 0;

}
@@ -495,6 +497,12 @@ int snd_card_register(struct snd_card *card) 
	int err;



	snd_assert(card != NULL, return -EINVAL);

	if (!card->dev) {

		card->dev = device_create(sound_class, card->parent, 0,

					  "card%i", card->number);

		if (IS_ERR(card->dev))

			card->dev = NULL;

	}

	if ((err = snd_device_register_all(card)) < 0)

		return err;

	mutex_lock(&snd_card_mutex);

sound/core/pcm.c

+4 −3
Original line number Diff line number Diff line
@@ -910,7 +910,8 @@ void snd_pcm_detach_substream(struct snd_pcm_substream *substream) 
	substream->pstr->substream_opened--;

}



static ssize_t show_pcm_class(struct class_device *class_device, char *buf)

static ssize_t show_pcm_class(struct device *dev,

			      struct device_attribute *attr, char *buf)

{

	struct snd_pcm *pcm;

	const char *str;
@@ -921,7 +922,7 @@ static ssize_t show_pcm_class(struct class_device *class_device, char *buf) 
		[SNDRV_PCM_CLASS_DIGITIZER] = "digitizer",

	};



	if (! (pcm = class_get_devdata(class_device)) ||

	if (! (pcm = dev_get_drvdata(dev)) ||

	    pcm->dev_class > SNDRV_PCM_CLASS_LAST)

		str = "none";

	else
@@ -929,7 +930,7 @@ static ssize_t show_pcm_class(struct class_device *class_device, char *buf) 
        return snprintf(buf, PAGE_SIZE, "%s\n", str);

}



static struct class_device_attribute pcm_attrs =

static struct device_attribute pcm_attrs =

	__ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL);



static int snd_pcm_dev_register(struct snd_device *device)

sound/core/sound.c

+9 −13
Original line number Diff line number Diff line
@@ -61,9 +61,6 @@ EXPORT_SYMBOL(snd_ecards_limit); 
static struct snd_minor *snd_minors[SNDRV_OS_MINORS];

static DEFINE_MUTEX(sound_mutex);



extern struct class *sound_class;





#ifdef CONFIG_KMOD



/**
@@ -268,11 +265,10 @@ int snd_register_device(int type, struct snd_card *card, int dev, 
	snd_minors[minor] = preg;

	if (card)

		device = card->dev;

	preg->class_dev = class_device_create(sound_class, NULL,

					      MKDEV(major, minor),

					      device, "%s", name);

	if (preg->class_dev)

		class_set_devdata(preg->class_dev, private_data);

	preg->dev = device_create(sound_class, device, MKDEV(major, minor),

				  "%s", name);

	if (preg->dev)

		dev_set_drvdata(preg->dev, private_data);



	mutex_unlock(&sound_mutex);

	return 0;
@@ -320,7 +316,7 @@ int snd_unregister_device(int type, struct snd_card *card, int dev) 
		return -EINVAL;

	}



	class_device_destroy(sound_class, MKDEV(major, minor));

	device_destroy(sound_class, MKDEV(major, minor));



	kfree(snd_minors[minor]);

	snd_minors[minor] = NULL;
@@ -331,15 +327,15 @@ int snd_unregister_device(int type, struct snd_card *card, int dev) 
EXPORT_SYMBOL(snd_unregister_device);



int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev,

			      const struct class_device_attribute *attr)

			      struct device_attribute *attr)

{

	int minor, ret = -EINVAL;

	struct class_device *cdev;

	struct device *d;



	mutex_lock(&sound_mutex);

	minor = find_snd_minor(type, card, dev);

	if (minor >= 0 && (cdev = snd_minors[minor]->class_dev) != NULL)

		ret = class_device_create_file(cdev, attr);

	if (minor >= 0 && (d = snd_minors[minor]->dev) != NULL)

		ret = device_create_file(d, attr);

	mutex_unlock(&sound_mutex);

	return ret;

sound/oss/soundcard.c

+8 −8
Original line number Diff line number Diff line
@@ -557,17 +557,17 @@ static int __init oss_init(void) 
	sound_dmap_flag = (dmabuf > 0 ? 1 : 0);



	for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {

		class_device_create(sound_class, NULL,

		device_create(sound_class, NULL,

			      MKDEV(SOUND_MAJOR, dev_list[i].minor),

				    NULL, "%s", dev_list[i].name);

			      "%s", dev_list[i].name);



		if (!dev_list[i].num)

			continue;



		for (j = 1; j < *dev_list[i].num; j++)

			class_device_create(sound_class, NULL,

			device_create(sound_class, NULL,

				      MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)),

					    NULL, "%s%d", dev_list[i].name, j);

				      "%s%d", dev_list[i].name, j);

	}



	if (sound_nblocks >= 1024)
@@ -581,11 +581,11 @@ static void __exit oss_cleanup(void) 
	int i, j;



	for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {

		class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));

		device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));

		if (!dev_list[i].num)

			continue;

		for (j = 1; j < *dev_list[i].num; j++)

			class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));

			device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));

	}

	

	unregister_sound_special(1);

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