Signed-off-by: Felix Homann linuxaudio@showlabor.de
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index ea95ce2..1c37792 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -542,6 +542,31 @@ static int add_control_to_empty(struct mixer_build *state, struct snd_kcontrol * return 0; }
+/* + * This is almost the same as 'add_control_to_empty' but using a mixer instead of a mixer_build + * it simplifies building a mixer for devices without proper descriptors, + * e.g. the Fast Track Ultra devices + */ +int add_unique_control_to_empty_mixer(struct usb_mixer_interface *mixer, struct snd_kcontrol *kctl) +{ + struct usb_mixer_elem_info *cval = kctl->private_data; + int err; + + /* No duplicates! */ + if (snd_ctl_find_id(mixer->chip->card, &kctl->id)) + return 0; + + if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) { + snd_printd(KERN_ERR "cannot add control (err = %d)\n", err); + return err; + } + + cval->elem_id = &kctl->id; + cval->next_id_elem = mixer->id_elems[cval->id]; + mixer->id_elems[cval->id] = cval; + + return 0; +}
/* * get a terminal name string @@ -1331,6 +1356,57 @@ static void build_mixer_unit_ctl(struct mixer_build *state, add_control_to_empty(state, kctl); }
+/* + * build a mixer unit control and give it a name + * + * this is essentially identical to build_mixer_unit_ctl but doesn't + * rely on proper descriptors to get a name for a control. + * At least, useful for Fast Track Ultra devices. + */ + +int build_named_mixer_unit_ctl(struct usb_mixer_interface *mixer, + int in_pin, int in_ch, int unitid, int val_type, unsigned int cmask, char* ctrl_name, int channels) +{ + struct usb_mixer_elem_info *cval; + struct snd_kcontrol *kctl; + int err; + + cval = kzalloc(sizeof(*cval), GFP_KERNEL); + if (! cval) + return -1; + + cval->mixer = mixer; + cval->id = unitid; + cval->control = in_ch + 1; /* based on 1 */ + cval->val_type = val_type; /* like USB_MIXER_S16 etc. */ + if (!((0 < channels) && (channels <= MAX_CHANNELS))) + return -1; + cval->channels = 1; + cval->cmask = cmask; + /* get min/max values */ + get_min_max(cval, 0); + + kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); + if (! kctl) { + snd_printk(KERN_ERR "cannot malloc kcontrol\n"); + kfree(cval); + return -1; + } + + kctl->tlv.c = mixer_vol_tlv; + kctl->vd[0].access |= + SNDRV_CTL_ELEM_ACCESS_TLV_READ | + SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; + kctl->private_free = usb_mixer_elem_free; + + sprintf(kctl->id.name, ctrl_name); + + if (err = add_unique_control_to_empty_mixer(mixer, kctl)) + return err; + + return 0; +} +
/* * parse a mixer unit diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h index 86af922..6fe7bea 100644 --- a/sound/usb/mixer.h +++ b/sound/usb/mixer.h @@ -61,6 +61,9 @@ void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int value_set); +int build_named_mixer_unit_ctl(struct usb_mixer_interface *mixer, + int in_pin, int in_ch, int unitid, int val_type, + unsigned int cmask, char* ctrl_name, int channels); void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer); int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c index 73dcc82..e87f359 100644 --- a/sound/usb/mixer_quirks.c +++ b/sound/usb/mixer_quirks.c @@ -500,6 +500,36 @@ void snd_emuusb_set_samplerate(struct snd_usb_audio *chip, } }
+/* + * Create mixer controls for Fast Track Ultra (8R) + */ +int snd_ftu_controls_create(struct usb_mixer_interface *mixer) +{ + char name[44]; + int out, in_ch, unitid, err; + unsigned int cmask; + int val_type = USB_MIXER_S16; + int channels = 1; /* mono channels */ + + unitid = 5; // FTU's unit id + for (out = 0; out < 8; ++out) { + for (in_ch = 0; in_ch < 16; ++in_ch) { + cmask = (1 << in_ch); + if (in_ch < 8) + sprintf(name, "AIn%d - Out%d Capture Volume", in_ch + 1, out + 1); + else if (in_ch >= 8) + sprintf(name, "DIn%d - Out%d Playback Volume", in_ch - 7, out + 1); + if ((err = build_named_mixer_unit_ctl(mixer, in_ch, out, unitid, + val_type, cmask, name, channels))) { + return err; + } + } + } + + return 0; +} + + int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer) { int err = 0; @@ -537,6 +567,10 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer) snd_nativeinstruments_ta10_mixers, ARRAY_SIZE(snd_nativeinstruments_ta10_mixers)); break; + case USB_ID(0x0763, 0x2080):/* M-Audio Fast Track Ultra */ + case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */ + err = snd_ftu_controls_create(mixer); + break; }
return err;