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ALSA: usb-audio: Add mixer control for Digidesign Mbox 1 clock source

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This patch provides the infrastructure for the Digidesign Mbox 1
to have a mixer control for selecting the clock source.
Valid options are Internal and S/PDIF external sync.
A non-documented command is sent to the device to enable this feature
found by reverse engineering and bus snooping.

Signed-off-by: Damien Zammit <damien@zamaudio.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Damien Zammit 2014-11-12 01:09:54 +11:00 committed by Takashi Iwai
parent ddcecf6b6a
commit d497a82fb1
2 changed files with 138 additions and 0 deletions
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9
sound/usb/mixer_maps.c
View File

@ -179,6 +179,11 @@ static struct usbmix_name_map audigy2nx_map[] = {
{ 0 } /* terminator */
};
static struct usbmix_name_map mbox1_map[] = {
{ 1, "Clock" },
{ 0 } /* terminator */
};
static struct usbmix_selector_map c400_selectors[] = {
{
.id = 0x80,
@ -415,6 +420,10 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
.id = USB_ID(0x0ccd, 0x0028),
.map = aureon_51_2_map,
},
{
.id = USB_ID(0x0dba, 0x1000),
.map = mbox1_map,
},
{
.id = USB_ID(0x13e5, 0x0001),
.map = scratch_live_map,

129
sound/usb/mixer_quirks.c
View File

@ -565,6 +565,131 @@ static int snd_xonar_u1_controls_create(struct usb_mixer_interface *mixer)
return 0;
}
/* Digidesign Mbox 1 clock source switch (internal/spdif) */
static int snd_mbox1_switch_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.enumerated.item[0] = kctl->private_value;
return 0;
}
static int snd_mbox1_switch_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_usb_audio *chip;
struct usb_mixer_interface *mixer;
int err;
bool cur_val, new_val;
unsigned char buff[3];
cur_val = kctl->private_value;
new_val = ucontrol->value.enumerated.item[0];
mixer = snd_kcontrol_chip(kctl);
if (snd_BUG_ON(!mixer))
return -EINVAL;
chip = mixer->chip;
if (snd_BUG_ON(!chip))
return -EINVAL;
if (cur_val == new_val)
return 0;
down_read(&chip->shutdown_rwsem);
if (chip->shutdown) {
err = -ENODEV;
goto err;
}
/* Prepare for magic command to toggle clock source */
err = snd_usb_ctl_msg(chip->dev,
usb_rcvctrlpipe(chip->dev, 0), 0x81,
USB_DIR_IN |
USB_TYPE_CLASS |
USB_RECIP_INTERFACE, 0x00, 0x500, buff, 1);
if (err < 0)
goto err;
err = snd_usb_ctl_msg(chip->dev,
usb_rcvctrlpipe(chip->dev, 0), 0x81,
USB_DIR_IN |
USB_TYPE_CLASS |
USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
if (err < 0)
goto err;
/* 2 possibilities: Internal -> send sample rate
* S/PDIF sync -> send zeroes
* NB: Sample rate locked to 48kHz on purpose to
* prevent user from resetting the sample rate
* while S/PDIF sync is enabled and confusing
* this configuration.
*/
if (new_val == 0) {
buff[0] = 0x80;
buff[1] = 0xbb;
buff[2] = 0x00;
} else {
buff[0] = buff[1] = buff[2] = 0x00;
}
/* Send the magic command to toggle the clock source */
err = snd_usb_ctl_msg(chip->dev,
usb_sndctrlpipe(chip->dev, 0), 0x1,
USB_TYPE_CLASS |
USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
if (err < 0)
goto err;
err = snd_usb_ctl_msg(chip->dev,
usb_rcvctrlpipe(chip->dev, 0), 0x81,
USB_DIR_IN |
USB_TYPE_CLASS |
USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
if (err < 0)
goto err;
err = snd_usb_ctl_msg(chip->dev,
usb_rcvctrlpipe(chip->dev, 0), 0x81,
USB_DIR_IN |
USB_TYPE_CLASS |
USB_RECIP_ENDPOINT, 0x100, 0x2, buff, 3);
if (err < 0)
goto err;
kctl->private_value = new_val;
err:
up_read(&chip->shutdown_rwsem);
return err < 0 ? err : 1;
}
static int snd_mbox1_switch_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
static const char *const texts[2] = {
"Internal",
"S/PDIF"
};
return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
}
static struct snd_kcontrol_new snd_mbox1_switch = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Clock Source",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.info = snd_mbox1_switch_info,
.get = snd_mbox1_switch_get,
.put = snd_mbox1_switch_put,
.private_value = 0
};
static int snd_mbox1_create_sync_switch(struct usb_mixer_interface *mixer)
{
return snd_ctl_add(mixer->chip->card,
snd_ctl_new1(&snd_mbox1_switch, mixer));
}
/* Native Instruments device quirks */
#define _MAKE_NI_CONTROL(bRequest,wIndex) ((bRequest) << 16 | (wIndex))
@ -1632,6 +1757,10 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
err = snd_microii_controls_create(mixer);
break;
case USB_ID(0x0dba, 0x1000): /* Digidesign Mbox 1 */
err = snd_mbox1_create_sync_switch(mixer);
break;
case USB_ID(0x17cc, 0x1011): /* Traktor Audio 6 */
err = snd_nativeinstruments_create_mixer(mixer,
snd_nativeinstruments_ta6_mixers,