[PATCH 0/2 v3] Digidesign Mbox 1 enhancements

[PATCH 0/2 v3] Digidesign Mbox 1 enhancements

[Damien Zammit]

This is the third patchset to provide mixer control and duplex mode.
Was rebased on top of 85a8181329a and tested on the hardware.

Damien Zammit (2):
  ALSA: usb-audio: Add mixer control for Digidesign mbox 1 clock source
  ALSA: usb-audio: Add duplex mode for Digidesign Mbox 1 and enable
    mixer

 sound/usb/mixer_maps.c   |   9 +++
 sound/usb/mixer_quirks.c | 142 +++++++++++++++++++++++++++++++++++++++++++++++
 sound/usb/quirks-table.h |  43 ++++++++++----
 3 files changed, 184 insertions(+), 10 deletions(-)

-- 
1.9.1

[PATCH 1/2 v3] ALSA: usb-audio: Add mixer control for Digidesign mbox 1 clock source

[Damien Zammit]

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>
---
 sound/usb/mixer_maps.c   |   9 +++
 sound/usb/mixer_quirks.c | 142 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 151 insertions(+)

diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index d1d72ff..1994d41 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -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,
@@ -416,6 +421,10 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
 		.map = aureon_51_2_map,
 	},
 	{
+		.id = USB_ID(0x0dba, 0x1000),
+		.map = mbox1_map,
+	},
+	{
 		.id = USB_ID(0x13e5, 0x0001),
 		.map = scratch_live_map,
 		.ignore_ctl_error = 1,
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index 3980bf5..edafc0e 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -565,6 +565,141 @@ 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)
+{
+	if (kctl->private_value) {
+		ucontrol->value.enumerated.item[0] = true;
+		return 0;
+	}
+
+	ucontrol->value.enumerated.item[0] = false;
+	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 changed, cur_val, new_val;
+	bool value;
+	unsigned char buff[3];
+
+	changed = false;
+	value = false;
+
+	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;
+
+	/* update value if needed */
+	if (cur_val != new_val) {
+		value = new_val;
+		down_read(&chip->shutdown_rwsem);
+		if (chip->shutdown) {
+			err = -ENODEV;
+		} else {
+			/* 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)
+				return 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)
+				return 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)
+				return 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)
+				return 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)
+				return err;
+		}
+		up_read(&chip->shutdown_rwsem);
+		if (err < 0)
+			return err;
+
+		kctl->private_value = new_val;
+		changed = true;
+	}
+
+	return changed;
+}
+
+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))
@@ -1605,6 +1740,13 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
 					      snd_audigy2nx_proc_read);
 		break;
 
+	/* Digidesign Mbox 1 */
+	case USB_ID(0x0dba, 0x1000):
+		err = snd_mbox1_create_sync_switch(mixer);
+		if (err < 0)
+			break;
+		break;
+
 	/* EMU0204 */
 	case USB_ID(0x041e, 0x3f19):
 		err = snd_emu0204_controls_create(mixer);
-- 
1.9.1

[PATCH 2/2 v3] ALSA: usb-audio: Add duplex mode for Digidesign Mbox 1 and enable mixer

[Damien Zammit]

This patch provides duplex support for the Digidesign Mbox 1 sound
card and has been a work in progress for about a year.
Users have confirmed on my website that previous versions of this patch
have worked on the hardware and I have been testing extensively.

It also enables the mixer control for providing clock source
selector based on the previous patch.

The sample rate has been hardcoded to 48kHz because it works better with
the S/PDIF sync mode when the sample rate is locked.  This is the
highest rate that the device supports and no loss of functionality
is observed by restricting the sample rate apart from the inability to select
a lower rate.

Signed-off-by: Damien Zammit <damien@zamaudio.com>
---
 sound/usb/quirks-table.h | 43 +++++++++++++++++++++++++++++++++----------
 1 file changed, 33 insertions(+), 10 deletions(-)

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index c657752..19eee96 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -2941,10 +2941,10 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		.product_name = "MBox",
 		.ifnum = QUIRK_ANY_INTERFACE,
 		.type = QUIRK_COMPOSITE,
-		.data = (const struct snd_usb_audio_quirk[]){
+		.data = &(const struct snd_usb_audio_quirk[]){
 			{
 				.ifnum = 0,
-				.type = QUIRK_IGNORE_INTERFACE,
+				.type = QUIRK_AUDIO_STANDARD_MIXER,
 			},
 			{
 				.ifnum = 1,
@@ -2955,16 +2955,40 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 					.iface = 1,
 					.altsetting = 1,
 					.altset_idx = 1,
-					.attributes = UAC_EP_CS_ATTR_SAMPLE_RATE,
+					.attributes = 0x4,
 					.endpoint = 0x02,
-					.ep_attr = 0x01,
-					.rates = SNDRV_PCM_RATE_44100 |
-						 SNDRV_PCM_RATE_48000,
-					.rate_min = 44100,
+					.ep_attr = USB_ENDPOINT_XFER_ISOC |
+						USB_ENDPOINT_SYNC_SYNC,
+					.maxpacksize = 0x130,
+					.rates = SNDRV_PCM_RATE_48000,
+					.rate_min = 48000,
 					.rate_max = 48000,
-					.nr_rates = 2,
+					.nr_rates = 1,
 					.rate_table = (unsigned int[]) {
-						44100, 48000
+						48000
+					}
+				}
+			},
+			{
+				.ifnum = 1,
+				.type = QUIRK_AUDIO_FIXED_ENDPOINT,
+				.data = &(const struct audioformat) {
+					.formats = SNDRV_PCM_FMTBIT_S24_3BE,
+					.channels = 2,
+					.iface = 1,
+					.altsetting = 1,
+					.altset_idx = 1,
+					.attributes = 0x4,
+					.endpoint = 0x81,
+					.ep_attr = USB_ENDPOINT_XFER_ISOC |
+						USB_ENDPOINT_SYNC_ASYNC,
+					.maxpacksize = 0x130,
+					.rates = SNDRV_PCM_RATE_48000,
+					.rate_min = 48000,
+					.rate_max = 48000,
+					.nr_rates = 1,
+					.rate_table = (unsigned int[]) {
+						48000
 					}
 				}
 			},
@@ -2972,7 +2996,6 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 				.ifnum = -1
 			}
 		}
-
 	}
 },
 
-- 
1.9.1

Re: [PATCH 1/2 v3] ALSA: usb-audio: Add mixer control for Digidesign mbox 1 clock source

[Clemens Ladisch]

Damien Zammit wrote:
> 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>
> ---
>  sound/usb/mixer_maps.c   |   9 +++
>  sound/usb/mixer_quirks.c | 142 +++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 151 insertions(+)
>
> +++ b/sound/usb/mixer_maps.c
> +static int snd_mbox1_switch_put(struct snd_kcontrol *kctl,
> +				struct snd_ctl_elem_value *ucontrol)
> +{
> ...
> +		down_read(&chip->shutdown_rwsem);
> +		if (chip->shutdown) {
> +			err = -ENODEV;
> +		} else {
> +			/* 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)
> +				return err;

The semaphore is still locked.

> @@ -1605,6 +1740,13 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
>  					      snd_audigy2nx_proc_read);
>  		break;
>
> +	/* Digidesign Mbox 1 */
> +	case USB_ID(0x0dba, 0x1000):

The IDs are supposed to be sorted by their value.

> +		err = snd_mbox1_create_sync_switch(mixer);
> +		if (err < 0)
> +			break;
> +		break;

This if() is meaningless.


Regards,
Clemens