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ALSA: usb-audio: Use a table of mixer controls 

Allow mixer controls to be provided clearly in a table, to avoid
quantity of error checking at each use.

Signed-off-by: Mark Hills <mark@pogo.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Mark Hills 2012-06-09 13:16:38 +01:00 committed by Takashi Iwai
parent 223f18e448
commit b71dad181a
1 changed files with 49 additions and 56 deletions
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105
sound/usb/mixer_quirks.c
View File

@ -42,6 +42,13 @@
extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
struct std_mono_table {
unsigned int unitid, control, cmask;
int val_type;
const char *name;
snd_kcontrol_tlv_rw_t *tlv_callback;
};
/* private_free callback */
static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
{
@ -113,6 +120,25 @@ static int snd_create_std_mono_ctl(struct usb_mixer_interface *mixer,
return 0;
}
/*
* Create a set of standard UAC controls from a table
*/
static int snd_create_std_mono_table(struct usb_mixer_interface *mixer,
struct std_mono_table *t)
{
int err;
while (t->name != NULL) {
err = snd_create_std_mono_ctl(mixer, t->unitid, t->control,
t->cmask, t->val_type, t->name, t->tlv_callback);
if (err < 0)
return err;
t++;
}
return 0;
}
/*
* Sound Blaster remote control configuration
*
@ -916,61 +942,6 @@ static int snd_ftu_create_mixer(struct usb_mixer_interface *mixer)
return 0;
}
/*
* Create mixer for Electrix Ebox-44
*
* The mixer units from this device are corrupt, and even where they
* are valid they presents mono controls as L and R channels of
* stereo. So we create a good mixer in code.
*/
static int snd_ebox44_create_mixer(struct usb_mixer_interface *mixer)
{
int err;
err = snd_create_std_mono_ctl(mixer, 4, 1, 0x0, USB_MIXER_INV_BOOLEAN,
"Headphone Playback Switch", NULL);
if (err < 0)
return err;
err = snd_create_std_mono_ctl(mixer, 4, 2, 0x1, USB_MIXER_S16,
"Headphone A Mix Playback Volume", NULL);
if (err < 0)
return err;
err = snd_create_std_mono_ctl(mixer, 4, 2, 0x2, USB_MIXER_S16,
"Headphone B Mix Playback Volume", NULL);
if (err < 0)
return err;
err = snd_create_std_mono_ctl(mixer, 7, 1, 0x0, USB_MIXER_INV_BOOLEAN,
"Output Playback Switch", NULL);
if (err < 0)
return err;
err = snd_create_std_mono_ctl(mixer, 7, 2, 0x1, USB_MIXER_S16,
"Output A Playback Volume", NULL);
if (err < 0)
return err;
err = snd_create_std_mono_ctl(mixer, 7, 2, 0x2, USB_MIXER_S16,
"Output B Playback Volume", NULL);
if (err < 0)
return err;
err = snd_create_std_mono_ctl(mixer, 10, 1, 0x0, USB_MIXER_INV_BOOLEAN,
"Input Capture Switch", NULL);
if (err < 0)
return err;
err = snd_create_std_mono_ctl(mixer, 10, 2, 0x1, USB_MIXER_S16,
"Input A Capture Volume", NULL);
if (err < 0)
return err;
err = snd_create_std_mono_ctl(mixer, 10, 2, 0x2, USB_MIXER_S16,
"Input B Capture Volume", NULL);
if (err < 0)
return err;
return 0;
}
void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
unsigned char samplerate_id)
{
@ -990,6 +961,27 @@ void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
}
}
/*
* The mixer units for Ebox-44 are corrupt, and even where they
* are valid they presents mono controls as L and R channels of
* stereo. So we provide a good mixer here.
*/
struct std_mono_table ebox44_table[] = {
{ 4, 1, 0x0, USB_MIXER_INV_BOOLEAN, "Headphone Playback Switch", NULL },
{ 4, 2, 0x1, USB_MIXER_S16, "Headphone A Mix Playback Volume", NULL },
{ 4, 2, 0x2, USB_MIXER_S16, "Headphone B Mix Playback Volume", NULL },
{ 7, 1, 0x0, USB_MIXER_INV_BOOLEAN, "Output Playback Switch", NULL },
{ 7, 2, 0x1, USB_MIXER_S16, "Output A Playback Volume", NULL },
{ 7, 2, 0x2, USB_MIXER_S16, "Output B Playback Volume", NULL },
{ 10, 1, 0x0, USB_MIXER_INV_BOOLEAN, "Input Capture Switch", NULL },
{ 10, 2, 0x1, USB_MIXER_S16, "Input A Capture Volume", NULL },
{ 10, 2, 0x2, USB_MIXER_S16, "Input B Capture Volume", NULL },
{ }
};
int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
{
int err = 0;
@ -1035,7 +1027,8 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
break;
case USB_ID(0x200c, 0x1018): /* Electrix Ebox-44 */
err = snd_ebox44_create_mixer(mixer);
/* detection is disabled in mixer_maps.c */
err = snd_create_std_mono_table(mixer, ebox44_table);
break;
}