Hi Piotr, great to see someone else also working on getting the U7 working! Unfortunately I don't have the answer you're looking for as I don't know that much about ALSA actually. Most of what I've done was just comparing the UAC2 specification with what the driver does, and some light USB protocol sniffing.

I'm not actively working on the driver since I bought a new sound card for my PC and am using the U7 with my Windows laptop, but send me a message on Google Hangouts if you think I can help with something.

When I connect the U7 it starts with "mic" as input, but I have to switch it to line and back to mic before it works. Does this happen to you too?

//Johan

On 10 September 2015 at 16:47, Piotr SQ9FK sq9fk@wp.pl wrote:

Hello Takashi,Johan My patches are unessesary since following last patch was applied to the git: ALSA: usb-audio: Change internal PCM order

Capture working but there are no volume sliders for Line-In Capture or Mic-In Capture (I can only toggle on off). Probably the RANGES are broken?. From ASUS Windows driver I can see following ranges:

Master Volume: (Phisycal Knob on Asus) from 100 to 1 correspond 0dB to -70dB, 0 is -127dB Range from 1 to 100 -> 0dB to -70dB (logarythmic)

Mic-In: from 100 to 1 correspond 30dB to -10dB, 0 is -192dB Range from 1 to 10 -> -10dB to 10dB (linear?) Range from 11 to 100 -> 10dB to 30dB (logarythmic)

Line-In: from 100 to 1 correspond 0dB to -40dB, 0 is -192dB Range from 11 to 100 -> 10dB to 30dB (logarythmic)

Actual Situation: Input Gain Pad Control - 3 steps [0 - 50 - 100] Double Slider. In Capture and Playback Categories, both of them are controlled in the same time. Controls Playback Volume only, Capture not.

"Mic" and "Line" Switches [on/off] PCM Cature Source [Line/Mic] Electret Mic doesn't work. With all possible configurations - Silent. When I pluged Line level signal, I can record the signal without problems. PCM Capture Source [Line] - Line [on] Mic [off] - Sound PCM Capture Source [Line] - Line [on] Mic [on] - Sound PCM Capture Source [Line] - Line [off] Mic [off] - No Sound PCM Capture Source [Line] - Line [off] Mic [on] - No Sound The same with selected [Mic]. There is no Capture Volume control.

PCM 1 [mute/on] I think this is SPDIF switch. It doesn't work. When I switch it on -> Blue Led on Xonar doesn't light up.

I attached screen of alsamixer, usbmix from proc and my mixer_map from my old patch. I think there are is still bugs in parsing. Please point me how I can add manually Volume control for Capture?

Piotr Gaska

W dniu 2015-07-27 o 14:10, Takashi Iwai pisze:

...

On Sun, 26 Jul 2015 10:00:12 +0200, Piotr G. wrote:

...

Hello, This is my first patch to alsa-devel, and I'm not very skilled programmer. From lsusb -vvv, I've draw Xonar U7 map with all IT OT FU CS in mixer_map.c I don't know why the driver by default doesn't parse all info correctly. With this patch you can see Line Switch and Mic Switch in alsamixer. I can record my voice in Audacity with all supported bit and sampling rates in Mono or Stereo This is temporary solution. Please correct me if the patch is not properly made.

What doesn't work:
- Cannot change Capture Volume for Line/Mic. No mixer control in

alsamixer - Switching between Line/Mic doesn't work (Mute doesn't work) - SPDIF not tested As what I wrote at beginning I'm not skilled programmer so any help is aprreciated

proc-usbmixer -> cat /proc/asound/*/usbmix usb.debug -> lsusb -vv (only Asus Xonar U7)

The changes in mixer_maps.c look good, but what's the reason for uac2_audio_feature_info[]? It seems adding "Control" suffix to each entry, which doesn't look correct.

thanks,

Takashi

...

---

sound/usb/mixer.c      | 23 +++++++++++++++++++++--
sound/usb/mixer_maps.c | 48

++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 69 insertions(+), 2 deletions(-)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 6b3acba..027d160 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -818,6 +818,25 @@ static struct usb_feature_control_info audio_feature_info[] = { { "Phase Inverter Control", USB_MIXER_BOOLEAN }, };

+static struct usb_feature_control_info uac2_audio_feature_info[] = {

•   /* UAC2 specific */
  

•   { "Mute Control",               USB_MIXER_INV_BOOLEAN },
  

•   { "Volume Control",             USB_MIXER_S16 },
  

•   { "Bass Control",               USB_MIXER_S8 },
  

•   { "Mid Control",                USB_MIXER_S8 },
  

•   { "Treble Control",             USB_MIXER_S8 },
  

•   { "Graphic Equalizer Control",  USB_MIXER_S8 },
  

•   { "Automatic Gain Control",     USB_MIXER_BOOLEAN },
  

•   { "Delay Control",              USB_MIXER_S16 }, /* FIXME: U32 in
  

UAC2 */

•   { "Bass Boost Control",         USB_MIXER_BOOLEAN },
  

•   { "Loudness Control",           USB_MIXER_BOOLEAN },
  

•   { "Input Gain Control",         USB_MIXER_S16 },
  

•   { "Input Gain Pad Control",     USB_MIXER_S16 },
  

•   { "Phase Inverter Control",     USB_MIXER_BOOLEAN },
  

•   { "Underflow Control",          USB_MIXER_BOOLEAN },
  

•   { "Overflow Control",           USB_MIXER_BOOLEAN },
  

+};

• /* private_free callback */ void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl) {

@@ -1240,7 +1259,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc, snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid); cval->control = control; cval->cmask = ctl_mask;

•   cval->val_type = audio_feature_info[control-1].type;
  

•   cval->val_type = uac2_audio_feature_info[control-1].type;
    if (ctl_mask == 0) {
            cval->channels = 1;     /* master channel */
            cval->master_readonly = readonly_mask;
  

@@ -1318,7 +1337,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc, break; default: if (!len)

•                   strlcpy(kctl->id.name,
  

audio_feature_info[control-1].name,

•                   strlcpy(kctl->id.name,
  

uac2_audio_feature_info[control-1].name, sizeof(kctl->id.name)); break; } diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c index e5000da..07f510e 100644 --- a/sound/usb/mixer_maps.c +++ b/sound/usb/mixer_maps.c @@ -341,6 +341,48 @@ static const struct usbmix_name_map scms_usb3318_map[] = { { 0 } };

+/* ASUS Xonar U7 - USB CM6632A (ADC CS5361 // DAC Dolby CS4362A // DAC Stereo CS4398 */ +/* Topology:

+USB_IN[1]------->FU[13]-----------CS[18]--->Spk_OUT[7]

+Dig_IN[2]------->FU[14]-----------CS[19]--->Dig_OUT[8]

+Mic_IN[4]------->FU[16]---+

•                      SU[20]--CS[22]--->USB_OUT[11]
  

+Line_IN[5]------>FU[17]---+

+*/

+static const struct usbmix_name_map xonar_u7_map[] = {

•   /* 1: IT PCM  Analog (USB Streaming) */
  

•   /* 2: IT PCM2 Digital (USB Streaming) */
  

•   /* 4: IT Microphone */
  

•   /* 5: IT Line IN */
  

•   /* 7: OT Speaker */
  

•   /* 8: OT SPDIF */
  

•   /* 11 OT Capture Playback (USB Streaming) */
  

•   { 13, "Speaker Playback" },     /* 13 FU Speaker Out Mute/Volume
  

*/

•   { 14, "IEC958 Playback" },      /* 14 FU SPDIF Out Mute/Volume */
  

•   { 16, "Mic Capture" },          /* 16 FU Capture Mic-in
  

Mute/Volume */

•   { 17, "Line Capture" },         /* 17 FU Capture Line-in
  

Mute/Volume */

•   /* 18 CS for 1 PCM (USB Streaming) Clock Source */
  

•   /* 19 CS for 2 SPDIF (USB Streaming) Clock Source */
  

•   { 20, "Capture Source" },       /* 20 SU Capture Source Selector
  

*/

•   /* 22 CS Line-in and Mic-in Clock Source */
  

•   { 0 }
  

+};

+static struct usbmix_selector_map xonar_u7_selectors[] = { +{

•            .id = 20,
  

•            .count = 2,
  

•            .names = (const char*[]) {"Mic", "Line"}
  

•    },
  

•    { 0 } /* terminator */
  

+};

• /*
  • Control map entries
  */

@@ -451,6 +493,12 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = { .id = USB_ID(0x25c4, 0x0003), .map = scms_usb3318_map, },

•   {
  

•           /* Asus Xonar U7 */
  

•           .id = USB_ID(0x1043, 0x857c),
  

•           .map = xonar_u7_map,
  

•           .selector_map = xonar_u7_selectors,
  

•   },
    { 0 } /* terminator */
  

  };

-- 2.3.6