Add support for front jack channel selector which is present on EMU0204. It allows to get 4 channels out of this soundcard.
Tested-by: Yury Bushmelev jay@jay-tech.ru Signed-off-by: Vasily Khoruzhick anarsoul@gmail.com --- Control request looks like generic UAC_SET_CUR request, but with a bit weird values, valid values are { 0x01, 0x01} and { 0x01, 0x02 }, and there's no such control type ATM. I'm not well familiar with UAC so any suggestins how to get rid of custom control req are welcome!
sound/usb/mixer.h | 1 + sound/usb/mixer_quirks.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 78 insertions(+)
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h index aab80df..4a5f001 100644 --- a/sound/usb/mixer.h +++ b/sound/usb/mixer.h @@ -23,6 +23,7 @@ struct usb_mixer_interface {
u8 audigy2nx_leds[3]; u8 xonar_u1_status; + u8 emu0204_ch_switch; };
#define MAX_CHANNELS 16 /* max logical channels */ diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c index ebe9144..dc9a397 100644 --- a/sound/usb/mixer_quirks.c +++ b/sound/usb/mixer_quirks.c @@ -430,6 +430,76 @@ static void snd_audigy2nx_proc_read(struct snd_info_entry *entry, } }
+/* EMU0204 */ +#define snd_emu0204_ch_switch_info snd_ctl_boolean_mono_info + +static int snd_emu0204_ch_switch_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol); + + ucontrol->value.integer.value[0] = mixer->emu0204_ch_switch; + return 0; +} + +static int snd_emu0204_ch_switch_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol); + int value = ucontrol->value.integer.value[0]; + int err, changed; + unsigned char buf[2]; + + if (value > 1) + return -EINVAL; + + buf[0] = 0x01; + buf[1] = value ? 0x02 : 0x01; + + changed = value != mixer->emu0204_ch_switch; + down_read(&mixer->chip->shutdown_rwsem); + if (mixer->chip->shutdown) { + err = -ENODEV; + goto out; + } + err = snd_usb_ctl_msg(mixer->chip->dev, + usb_sndctrlpipe(mixer->chip->dev, 0), 0x1, + 0x21, + 0x0400, 0x0e00, buf, 2); + out: + up_read(&mixer->chip->shutdown_rwsem); + if (err < 0) + return err; + mixer->emu0204_ch_switch = value; + return changed; +} + + +static struct snd_kcontrol_new snd_emu0204_controls[] = { + { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Route channels 3/4 to front jack", + .info = snd_emu0204_ch_switch_info, + .get = snd_emu0204_ch_switch_get, + .put = snd_emu0204_ch_switch_put, + .private_value = 0, + }, +}; + +static int snd_emu0204_controls_create(struct usb_mixer_interface *mixer) +{ + int i, err; + + for (i = 0; i < ARRAY_SIZE(snd_emu0204_controls); ++i) { + err = snd_ctl_add(mixer->chip->card, + snd_ctl_new1(&snd_emu0204_controls[i], mixer)); + if (err < 0) + return err; + } + mixer->emu0204_ch_switch = 0; /* Default is 1/2 */ + + return 0; +} /* ASUS Xonar U1 / U3 controls */
static int snd_xonar_u1_switch_get(struct snd_kcontrol *kcontrol, @@ -1337,6 +1407,13 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer) snd_audigy2nx_proc_read); break;
+ /* EMU0204 */ + case USB_ID(0x041e, 0x3f19): + err = snd_emu0204_controls_create(mixer); + if (err < 0) + break; + break; + case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C400 */ err = snd_c400_create_mixer(mixer);