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[ALSA] dynamic minors (1/6): store device type in struct snd_minor

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Instead of a comment string, store the device type in the snd_minor
structure.  This makes snd_minor more flexible, and has the nice side
effect that we don't need anymore to create a separate snd_minor
template for registering a device but can pass the file_operations
directly to snd_register_device().

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2005-11-20 14:03:48 +01:00 committed by Jaroslav Kysela
parent a106cd3d9e
commit 2af677fc88
14 changed files with 108 additions and 114 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/sound/core.h
View File

@ -185,8 +185,8 @@ static inline int snd_power_wait(struct snd_card *card, unsigned int state, stru
struct snd_minor {
struct list_head list; /* list of all minors per card */
int number; /* minor number */
int type; /* SNDRV_DEVICE_TYPE_XXX */
int device; /* device number */
const char *comment; /* for /proc/asound/devices */
struct file_operations *f_ops; /* file operations */
char name[0]; /* device name (keep at the end of
structure) */
@ -199,11 +199,13 @@ extern int snd_ecards_limit;
void snd_request_card(int card);
int snd_register_device(int type, struct snd_card *card, int dev, struct snd_minor *reg, const char *name);
int snd_register_device(int type, struct snd_card *card, int dev,
struct file_operations *f_ops, const char *name);
int snd_unregister_device(int type, struct snd_card *card, int dev);
#ifdef CONFIG_SND_OSSEMUL
int snd_register_oss_device(int type, struct snd_card *card, int dev, struct snd_minor *reg, const char *name);
int snd_register_oss_device(int type, struct snd_card *card, int dev,
struct file_operations *f_ops, const char *name);
int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
#endif

3
include/sound/pcm.h
View File

@ -402,7 +402,6 @@ struct snd_pcm_str {
struct snd_pcm_oss_stream oss;
#endif
struct snd_pcm_file *files;
struct snd_minor *reg;
struct snd_info_entry *proc_root;
struct snd_info_entry *proc_info_entry;
#ifdef CONFIG_SND_DEBUG
@ -441,7 +440,7 @@ struct snd_pcm_notify {
*/
extern struct snd_pcm *snd_pcm_devices[];
extern struct snd_minor snd_pcm_reg[2];
extern struct file_operations snd_pcm_f_ops[2];
int snd_pcm_new(struct snd_card *card, char *id, int device,
int playback_count, int capture_count,

11
sound/core/control.c
View File

@ -1264,12 +1264,6 @@ static struct file_operations snd_ctl_f_ops =
.fasync = snd_ctl_fasync,
};
static struct snd_minor snd_ctl_reg =
{
.comment = "ctl",
.f_ops = &snd_ctl_f_ops,
};
/*
* registration of the control device
*/
@ -1284,7 +1278,7 @@ static int snd_ctl_dev_register(struct snd_device *device)
snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
sprintf(name, "controlC%i", cardnum);
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL,
card, 0, &snd_ctl_reg, name)) < 0)
card, -1, &snd_ctl_f_ops, name)) < 0)
return err;
return 0;
}
@ -1336,7 +1330,8 @@ static int snd_ctl_dev_unregister(struct snd_device *device)
snd_assert(card != NULL, return -ENXIO);
cardnum = card->number;
snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL, card, 0)) < 0)
if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL,
card, -1)) < 0)
return err;
return snd_ctl_dev_free(device);
}

11
sound/core/hwdep.c
View File

@ -330,12 +330,6 @@ static struct file_operations snd_hwdep_f_ops =
.mmap = snd_hwdep_mmap,
};
static struct snd_minor snd_hwdep_reg =
{
.comment = "hardware dependent",
.f_ops = &snd_hwdep_f_ops,
};
/**
* snd_hwdep_new - create a new hwdep instance
* @card: the card instance
@ -416,7 +410,7 @@ static int snd_hwdep_dev_register(struct snd_device *device)
sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
hwdep->card, hwdep->device,
&snd_hwdep_reg, name)) < 0) {
&snd_hwdep_f_ops, name)) < 0) {
snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
hwdep->card->number, hwdep->device);
snd_hwdep_devices[idx] = NULL;
@ -431,7 +425,8 @@ static int snd_hwdep_dev_register(struct snd_device *device)
} else {
if (snd_register_oss_device(hwdep->oss_type,
hwdep->card, hwdep->device,
&snd_hwdep_reg, hwdep->oss_dev) < 0) {
&snd_hwdep_f_ops,
hwdep->oss_dev) < 0) {
snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
hwdep->card->number, hwdep->device);
} else

8
sound/core/oss/mixer_oss.c
View File

@ -398,12 +398,6 @@ static struct file_operations snd_mixer_oss_f_ops =
.compat_ioctl = snd_mixer_oss_ioctl_compat,
};
static struct snd_minor snd_mixer_oss_reg =
{
.comment = "mixer",
.f_ops = &snd_mixer_oss_f_ops,
};
/*
* utilities
*/
@ -1292,7 +1286,7 @@ static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
sprintf(name, "mixer%i%i", card->number, 0);
if ((err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
card, 0,
&snd_mixer_oss_reg,
&snd_mixer_oss_f_ops,
name)) < 0) {
snd_printk(KERN_ERR "unable to register OSS mixer device %i:%i\n",
card->number, 0);

8
sound/core/oss/pcm_oss.c
View File

@ -2444,18 +2444,12 @@ static struct file_operations snd_pcm_oss_f_reg =
.mmap = snd_pcm_oss_mmap,
};
static struct snd_minor snd_pcm_oss_reg =
{
.comment = "digital audio",
.f_ops = &snd_pcm_oss_f_reg,
};
static void register_oss_dsp(struct snd_pcm *pcm, int index)
{
char name[128];
sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
pcm->card, index, &snd_pcm_oss_reg,
pcm->card, index, &snd_pcm_oss_f_reg,
name) < 0) {
snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
pcm->card->number, pcm->device);

6
sound/core/pcm.c
View File

@ -597,7 +597,6 @@ int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
pstr->stream = stream;
pstr->pcm = pcm;
pstr->substream_count = substream_count;
pstr->reg = &snd_pcm_reg[stream];
if (substream_count > 0) {
err = snd_pcm_stream_proc_init(pstr);
if (err < 0) {
@ -897,7 +896,10 @@ static int snd_pcm_dev_register(struct snd_device *device)
devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
break;
}
if ((err = snd_register_device(devtype, pcm->card, pcm->device, pcm->streams[cidx].reg, str)) < 0) {
if ((err = snd_register_device(devtype, pcm->card,
pcm->device,
&snd_pcm_f_ops[cidx], str)) < 0)
{
snd_pcm_devices[idx] = NULL;
up(&register_mutex);
return err;

53
sound/core/pcm_native.c
View File

@ -3370,40 +3370,29 @@ out:
* Register section
*/
static struct file_operations snd_pcm_f_ops_playback = {
.owner = THIS_MODULE,
.write = snd_pcm_write,
.writev = snd_pcm_writev,
.open = snd_pcm_open,
.release = snd_pcm_release,
.poll = snd_pcm_playback_poll,
.unlocked_ioctl = snd_pcm_playback_ioctl,
.compat_ioctl = snd_pcm_ioctl_compat,
.mmap = snd_pcm_mmap,
.fasync = snd_pcm_fasync,
};
static struct file_operations snd_pcm_f_ops_capture = {
.owner = THIS_MODULE,
.read = snd_pcm_read,
.readv = snd_pcm_readv,
.open = snd_pcm_open,
.release = snd_pcm_release,
.poll = snd_pcm_capture_poll,
.unlocked_ioctl = snd_pcm_capture_ioctl,
.compat_ioctl = snd_pcm_ioctl_compat,
.mmap = snd_pcm_mmap,
.fasync = snd_pcm_fasync,
};
struct snd_minor snd_pcm_reg[2] =
{
struct file_operations snd_pcm_f_ops[2] = {
{
.comment = "digital audio playback",
.f_ops = &snd_pcm_f_ops_playback,
.owner = THIS_MODULE,
.write = snd_pcm_write,
.writev = snd_pcm_writev,
.open = snd_pcm_open,
.release = snd_pcm_release,
.poll = snd_pcm_playback_poll,
.unlocked_ioctl = snd_pcm_playback_ioctl,
.compat_ioctl = snd_pcm_ioctl_compat,
.mmap = snd_pcm_mmap,
.fasync = snd_pcm_fasync,
},
{
.comment = "digital audio capture",
.f_ops = &snd_pcm_f_ops_capture,
.owner = THIS_MODULE,
.read = snd_pcm_read,
.readv = snd_pcm_readv,
.open = snd_pcm_open,
.release = snd_pcm_release,
.poll = snd_pcm_capture_poll,
.unlocked_ioctl = snd_pcm_capture_ioctl,
.compat_ioctl = snd_pcm_ioctl_compat,
.mmap = snd_pcm_mmap,
.fasync = snd_pcm_fasync,
}
};

14
sound/core/rawmidi.c
View File

@ -1367,12 +1367,6 @@ static struct file_operations snd_rawmidi_f_ops =
.compat_ioctl = snd_rawmidi_ioctl_compat,
};
static struct snd_minor snd_rawmidi_reg =
{
.comment = "raw midi",
.f_ops = &snd_rawmidi_f_ops,
};
static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
struct snd_rawmidi_str *stream,
int direction,
@ -1516,7 +1510,7 @@ static int snd_rawmidi_dev_register(struct snd_device *device)
sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
rmidi->card, rmidi->device,
&snd_rawmidi_reg, name)) < 0) {
&snd_rawmidi_f_ops, name)) < 0) {
snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
snd_rawmidi_devices[idx] = NULL;
up(&register_mutex);
@ -1533,7 +1527,8 @@ static int snd_rawmidi_dev_register(struct snd_device *device)
rmidi->ossreg = 0;
if ((int)rmidi->device == midi_map[rmidi->card->number]) {
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
rmidi->card, 0, &snd_rawmidi_reg, name) < 0) {
rmidi->card, 0,
&snd_rawmidi_f_ops, name) < 0) {
snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
} else {
rmidi->ossreg++;
@ -1544,7 +1539,8 @@ static int snd_rawmidi_dev_register(struct snd_device *device)
}
if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
rmidi->card, 1, &snd_rawmidi_reg, name) < 0) {
rmidi->card, 1,
&snd_rawmidi_f_ops, name) < 0) {
snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
} else {
rmidi->ossreg++;

9
sound/core/seq/oss/seq_oss.c
View File

@ -217,11 +217,6 @@ static struct file_operations seq_oss_f_ops =
.compat_ioctl = odev_ioctl_compat,
};
static struct snd_minor seq_oss_reg = {
.comment = "sequencer",
.f_ops = &seq_oss_f_ops,
};
static int __init
register_device(void)
{
@ -230,7 +225,7 @@ register_device(void)
down(&register_mutex);
if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER,
NULL, 0,
&seq_oss_reg,
&seq_oss_f_ops,
SNDRV_SEQ_OSS_DEVNAME)) < 0) {
snd_printk(KERN_ERR "can't register device seq\n");
up(&register_mutex);
@ -238,7 +233,7 @@ register_device(void)
}
if ((rc = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MUSIC,
NULL, 0,
&seq_oss_reg,
&seq_oss_f_ops,
SNDRV_SEQ_OSS_DEVNAME)) < 0) {
snd_printk(KERN_ERR "can't register device music\n");
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_SEQUENCER, NULL, 0);

10
sound/core/seq/seq_clientmgr.c
View File

@ -2520,13 +2520,6 @@ static struct file_operations snd_seq_f_ops =
.compat_ioctl = snd_seq_ioctl_compat,
};
static struct snd_minor snd_seq_reg =
{
.comment = "sequencer",
.f_ops = &snd_seq_f_ops,
};
/*
* register sequencer device
*/
@ -2537,7 +2530,8 @@ int __init snd_sequencer_device_init(void)
if (down_interruptible(&register_mutex))
return -ERESTARTSYS;
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, &snd_seq_reg, "seq")) < 0) {
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0,
&snd_seq_f_ops, "seq")) < 0) {
up(&register_mutex);
return err;
}

38
sound/core/sound.c
View File

@ -195,7 +195,7 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev)
* @type: the device type, SNDRV_DEVICE_TYPE_XXX
* @card: the card instance
* @dev: the device index
* @reg: the struct snd_minor record
* @f_ops: the file operations
* @name: the device file name
*
* Registers an ALSA device file for the given card.
@ -203,7 +203,8 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev)
*
* Retrurns zero if successful, or a negative error code on failure.
*/
int snd_register_device(int type, struct snd_card *card, int dev, struct snd_minor * reg, const char *name)
int snd_register_device(int type, struct snd_card *card, int dev,
struct file_operations *f_ops, const char *name)
{
int minor = snd_kernel_minor(type, card, dev);
struct snd_minor *preg;
@ -212,12 +213,13 @@ int snd_register_device(int type, struct snd_card *card, int dev, struct snd_min
if (minor < 0)
return minor;
snd_assert(name, return -EINVAL);
preg = kmalloc(sizeof(struct snd_minor) + strlen(name) + 1, GFP_KERNEL);
preg = kzalloc(sizeof(struct snd_minor) + strlen(name) + 1, GFP_KERNEL);
if (preg == NULL)
return -ENOMEM;
*preg = *reg;
preg->number = minor;
preg->type = type;
preg->device = dev;
preg->f_ops = f_ops;
strcpy(preg->name, name);
down(&sound_mutex);
if (snd_minor_search(minor)) {
@ -276,6 +278,28 @@ int snd_unregister_device(int type, struct snd_card *card, int dev)
static struct snd_info_entry *snd_minor_info_entry = NULL;
static const char *snd_device_type_name(int type)
{
switch (type) {
case SNDRV_DEVICE_TYPE_CONTROL:
return "control";
case SNDRV_DEVICE_TYPE_HWDEP:
return "hardware dependent";
case SNDRV_DEVICE_TYPE_RAWMIDI:
return "raw midi";
case SNDRV_DEVICE_TYPE_PCM_PLAYBACK:
return "digital audio playback";
case SNDRV_DEVICE_TYPE_PCM_CAPTURE:
return "digital audio capture";
case SNDRV_DEVICE_TYPE_SEQUENCER:
return "sequencer";
case SNDRV_DEVICE_TYPE_TIMER:
return "timer";
default:
return "?";
}
}
static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
int card, device;
@ -288,11 +312,11 @@ static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_bu
mptr = list_entry(list, struct snd_minor, list);
if (SNDRV_MINOR_DEVICE(mptr->number) != SNDRV_MINOR_GLOBAL) {
if ((device = mptr->device) >= 0)
snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, device, mptr->comment);
snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, device, snd_device_type_name(mptr->type));
else
snd_iprintf(buffer, "%3i: [%i] : %s\n", mptr->number, card, mptr->comment);
snd_iprintf(buffer, "%3i: [%i] : %s\n", mptr->number, card, snd_device_type_name(mptr->type));
} else {
snd_iprintf(buffer, "%3i: : %s\n", mptr->number, mptr->comment);
snd_iprintf(buffer, "%3i: : %s\n", mptr->number, snd_device_type_name(mptr->type));
}
}
}

35
sound/core/sound_oss.c
View File

@ -91,7 +91,7 @@ static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
}
int snd_register_oss_device(int type, struct snd_card *card, int dev,
struct snd_minor * reg, const char *name)
struct file_operations *f_ops, const char *name)
{
int minor = snd_oss_kernel_minor(type, card, dev);
int minor_unit;
@ -103,12 +103,13 @@ int snd_register_oss_device(int type, struct snd_card *card, int dev,
if (minor < 0)
return minor;
preg = (struct snd_minor *)kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
preg = kzalloc(sizeof(struct snd_minor), GFP_KERNEL);
if (preg == NULL)
return -ENOMEM;
*preg = *reg;
preg->number = minor;
preg->type = type;
preg->device = dev;
preg->f_ops = f_ops;
down(&sound_oss_mutex);
list_add_tail(&preg->list, &snd_oss_minors_hash[cidx]);
minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
@ -125,11 +126,12 @@ int snd_register_oss_device(int type, struct snd_card *card, int dev,
}
if (card)
carddev = card->dev;
register1 = register_sound_special_device(reg->f_ops, minor, carddev);
register1 = register_sound_special_device(f_ops, minor, carddev);
if (register1 != minor)
goto __end;
if (track2 >= 0) {
register2 = register_sound_special_device(reg->f_ops, track2, carddev);
register2 = register_sound_special_device(f_ops, track2,
carddev);
if (register2 != track2)
goto __end;
}
@ -190,6 +192,25 @@ int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
static struct snd_info_entry *snd_minor_info_oss_entry = NULL;
static const char *snd_oss_device_type_name(int type)
{
switch (type) {
case SNDRV_OSS_DEVICE_TYPE_MIXER:
return "mixer";
case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
case SNDRV_OSS_DEVICE_TYPE_MUSIC:
return "sequencer";
case SNDRV_OSS_DEVICE_TYPE_PCM:
return "digital audio";
case SNDRV_OSS_DEVICE_TYPE_MIDI:
return "raw midi";
case SNDRV_OSS_DEVICE_TYPE_DMFM:
return "hardware dependent";
default:
return "?";
}
}
static void snd_minor_info_oss_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
@ -205,9 +226,9 @@ static void snd_minor_info_oss_read(struct snd_info_entry *entry,
if (dev != SNDRV_MINOR_OSS_SNDSTAT &&
dev != SNDRV_MINOR_OSS_SEQUENCER &&
dev != SNDRV_MINOR_OSS_MUSIC)
snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, dev, mptr->comment);
snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, dev, snd_oss_device_type_name(mptr->type));
else
snd_iprintf(buffer, "%3i: : %s\n", mptr->number, mptr->comment);
snd_iprintf(buffer, "%3i: : %s\n", mptr->number, snd_oss_device_type_name(mptr->type));
}
}
up(&sound_oss_mutex);

8
sound/core/timer.c
View File

@ -1924,12 +1924,6 @@ static struct file_operations snd_timer_f_ops =
.fasync = snd_timer_user_fasync,
};
static struct snd_minor snd_timer_reg =
{
.comment = "timer",
.f_ops = &snd_timer_f_ops,
};
/*
* ENTRY functions
*/
@ -1959,7 +1953,7 @@ static int __init alsa_timer_init(void)
snd_printk(KERN_ERR "unable to register system timer (%i)\n",
err);
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER,
NULL, 0, &snd_timer_reg, "timer"))<0)
NULL, 0, &snd_timer_f_ops, "timer")) < 0)
snd_printk(KERN_ERR "unable to register timer device (%i)\n",
err);
return 0;