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ALSA: usb-audio: simplify control interface access

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As the control interface is now carried in struct snd_usb_audio, we can
simplify the API a little and also drop the private ctrlif field from
struct usb_mixer_interface.

Also remove a left-over function prototype in pcm.h.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel Mack
2010-06-16 17:57:31 +02:00
committed by Takashi Iwai
parent 157a57b6fa
commit 3d8d4dcfd4
8 changed files with 34 additions and 44 deletions
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22
sound/usb/clock.c
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@ -121,7 +121,6 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
}
static int __uac_clock_find_source(struct snd_usb_audio *chip,
struct usb_host_interface *host_iface,
int entity_id, unsigned long *visited)
{
struct uac_clock_source_descriptor *source;
@ -138,11 +137,11 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
}
/* first, see if the ID we're looking for is a clock source already */
source = snd_usb_find_clock_source(host_iface, entity_id);
source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
if (source)
return source->bClockID;
selector = snd_usb_find_clock_selector(host_iface, entity_id);
selector = snd_usb_find_clock_selector(chip->ctrl_intf, entity_id);
if (selector) {
int ret;
@ -162,16 +161,15 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
return -EINVAL;
}
return __uac_clock_find_source(chip, host_iface,
selector->baCSourceID[ret-1],
return __uac_clock_find_source(chip, selector->baCSourceID[ret-1],
visited);
}
/* FIXME: multipliers only act as pass-thru element for now */
multiplier = snd_usb_find_clock_multiplier(host_iface, entity_id);
multiplier = snd_usb_find_clock_multiplier(chip->ctrl_intf, entity_id);
if (multiplier)
return __uac_clock_find_source(chip, host_iface,
multiplier->bCSourceID, visited);
return __uac_clock_find_source(chip, multiplier->bCSourceID,
visited);
return -EINVAL;
}
@ -187,13 +185,11 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
*
* Returns the clock source UnitID (>=0) on success, or an error.
*/
int snd_usb_clock_find_source(struct snd_usb_audio *chip,
struct usb_host_interface *host_iface,
int entity_id)
int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id)
{
DECLARE_BITMAP(visited, 256);
memset(visited, 0, sizeof(visited));
return __uac_clock_find_source(chip, host_iface, entity_id, visited);
return __uac_clock_find_source(chip, entity_id, visited);
}
static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
@ -251,7 +247,7 @@ static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
struct usb_device *dev = chip->dev;
unsigned char data[4];
int err, crate;
int clock = snd_usb_clock_find_source(chip, chip->ctrl_intf, fmt->clock);
int clock = snd_usb_clock_find_source(chip, fmt->clock);
if (clock < 0)
return clock;