ALSA: usb-audio: Input source control - digidesign mbox
This adds a second mixer control to Digidesign Mbox to select between Analog/SPDIF capture. Users will note that selecting the SPDIF input source automatically switches the clock mode to sync to SPDIF, which is a feature of the hardware. (You can change the clock source back to internal if you want to capture from spdif but not sync to its clock although this mode is probably not recommended). Unfortunately, starting the stream resets both modes to Internally clocked and Analog input mode. Signed-off-by: Damien Zammit <damien@zamaudio.com> Tested-by: Damien Zammit <damien@zamaudio.com> Link: https://lore.kernel.org/r/20210813113402.11849-1-damien@zamaudio.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Damien Zammit
Takashi Iwai
parent
bda36b0fc2
commit
7ac2246f56
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@ -594,85 +594,138 @@ static int snd_xonar_u1_controls_create(struct usb_mixer_interface *mixer)
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&snd_xonar_u1_output_switch, NULL);
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}
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/* Digidesign Mbox 1 clock source switch (internal/spdif) */
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/* Digidesign Mbox 1 helper functions */
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static int snd_mbox1_switch_get(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_value *ucontrol)
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static int snd_mbox1_is_spdif_synced(struct snd_usb_audio *chip)
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{
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ucontrol->value.enumerated.item[0] = kctl->private_value;
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return 0;
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}
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static int snd_mbox1_switch_update(struct usb_mixer_interface *mixer, int val)
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{
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struct snd_usb_audio *chip = mixer->chip;
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int err;
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unsigned char buff[3];
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int err;
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int is_spdif_synced;
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err = snd_usb_lock_shutdown(chip);
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/* Read clock source */
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err = snd_usb_ctl_msg(chip->dev,
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usb_rcvctrlpipe(chip->dev, 0), 0x81,
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USB_DIR_IN |
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USB_TYPE_CLASS |
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USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
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if (err < 0)
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return err;
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/* Prepare for magic command to toggle clock source */
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err = snd_usb_ctl_msg(chip->dev,
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usb_rcvctrlpipe(chip->dev, 0), 0x81,
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USB_DIR_IN |
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USB_TYPE_CLASS |
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USB_RECIP_INTERFACE, 0x00, 0x500, buff, 1);
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if (err < 0)
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goto err;
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err = snd_usb_ctl_msg(chip->dev,
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usb_rcvctrlpipe(chip->dev, 0), 0x81,
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USB_DIR_IN |
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USB_TYPE_CLASS |
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USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
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if (err < 0)
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goto err;
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/* spdif sync: buff is all zeroes */
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is_spdif_synced = !(buff[0] | buff[1] | buff[2]);
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return is_spdif_synced;
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}
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/* 2 possibilities: Internal -> send sample rate
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* S/PDIF sync -> send zeroes
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* NB: Sample rate locked to 48kHz on purpose to
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* prevent user from resetting the sample rate
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* while S/PDIF sync is enabled and confusing
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* this configuration.
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static int snd_mbox1_set_clk_source(struct snd_usb_audio *chip, int rate_or_zero)
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{
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/* 2 possibilities: Internal -> expects sample rate
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* S/PDIF sync -> expects rate = 0
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*/
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if (val == 0) {
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buff[0] = 0x80;
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buff[1] = 0xbb;
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buff[2] = 0x00;
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} else {
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buff[0] = buff[1] = buff[2] = 0x00;
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}
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unsigned char buff[3];
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/* Send the magic command to toggle the clock source */
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buff[0] = (rate_or_zero >> 0) & 0xff;
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buff[1] = (rate_or_zero >> 8) & 0xff;
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buff[2] = (rate_or_zero >> 16) & 0xff;
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/* Set clock source */
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return snd_usb_ctl_msg(chip->dev,
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usb_sndctrlpipe(chip->dev, 0), 0x1,
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USB_TYPE_CLASS |
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USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
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}
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static int snd_mbox1_is_spdif_input(struct snd_usb_audio *chip)
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{
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/* Hardware gives 2 possibilities: ANALOG Source -> 0x01
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* S/PDIF Source -> 0x02
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*/
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int err;
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unsigned char source[1];
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/* Read input source */
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err = snd_usb_ctl_msg(chip->dev,
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usb_sndctrlpipe(chip->dev, 0), 0x1,
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USB_TYPE_CLASS |
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USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
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usb_rcvctrlpipe(chip->dev, 0), 0x81,
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USB_DIR_IN |
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USB_TYPE_CLASS |
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USB_RECIP_INTERFACE, 0x00, 0x500, source, 1);
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if (err < 0)
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goto err;
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err = snd_usb_ctl_msg(chip->dev,
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usb_rcvctrlpipe(chip->dev, 0), 0x81,
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USB_DIR_IN |
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USB_TYPE_CLASS |
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USB_RECIP_ENDPOINT, 0x100, 0x81, buff, 3);
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if (err < 0)
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goto err;
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err = snd_usb_ctl_msg(chip->dev,
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usb_rcvctrlpipe(chip->dev, 0), 0x81,
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USB_DIR_IN |
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USB_TYPE_CLASS |
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USB_RECIP_ENDPOINT, 0x100, 0x2, buff, 3);
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return err;
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return (source[0] == 2);
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}
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static int snd_mbox1_set_input_source(struct snd_usb_audio *chip, int is_spdif)
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{
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/* NB: Setting the input source to S/PDIF resets the clock source to S/PDIF
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* Hardware expects 2 possibilities: ANALOG Source -> 0x01
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* S/PDIF Source -> 0x02
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*/
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unsigned char buff[1];
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buff[0] = (is_spdif & 1) + 1;
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/* Set input source */
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return snd_usb_ctl_msg(chip->dev,
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usb_sndctrlpipe(chip->dev, 0), 0x1,
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USB_TYPE_CLASS |
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USB_RECIP_INTERFACE, 0x00, 0x500, buff, 1);
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}
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/* Digidesign Mbox 1 clock source switch (internal/spdif) */
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static int snd_mbox1_clk_switch_get(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct usb_mixer_elem_list *list = snd_kcontrol_chip(kctl);
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struct snd_usb_audio *chip = list->mixer->chip;
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int err;
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err = snd_usb_lock_shutdown(chip);
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if (err < 0)
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goto err;
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err = snd_mbox1_is_spdif_synced(chip);
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if (err < 0)
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goto err;
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kctl->private_value = err;
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err = 0;
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ucontrol->value.enumerated.item[0] = kctl->private_value;
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err:
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snd_usb_unlock_shutdown(chip);
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return err;
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}
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static int snd_mbox1_switch_put(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_value *ucontrol)
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static int snd_mbox1_clk_switch_update(struct usb_mixer_interface *mixer, int is_spdif_sync)
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{
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struct snd_usb_audio *chip = mixer->chip;
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int err;
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err = snd_usb_lock_shutdown(chip);
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if (err < 0)
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return err;
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err = snd_mbox1_is_spdif_input(chip);
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if (err < 0)
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goto err;
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err = snd_mbox1_is_spdif_synced(chip);
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if (err < 0)
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goto err;
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/* FIXME: hardcoded sample rate */
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err = snd_mbox1_set_clk_source(chip, is_spdif_sync ? 0 : 48000);
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if (err < 0)
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goto err;
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err = snd_mbox1_is_spdif_synced(chip);
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err:
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snd_usb_unlock_shutdown(chip);
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return err;
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}
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static int snd_mbox1_clk_switch_put(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct usb_mixer_elem_list *list = snd_kcontrol_chip(kctl);
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struct usb_mixer_interface *mixer = list->mixer;
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@ -685,12 +738,12 @@ static int snd_mbox1_switch_put(struct snd_kcontrol *kctl,
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return 0;
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kctl->private_value = new_val;
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err = snd_mbox1_switch_update(mixer, new_val);
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err = snd_mbox1_clk_switch_update(mixer, new_val);
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return err < 0 ? err : 1;
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}
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static int snd_mbox1_switch_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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static int snd_mbox1_clk_switch_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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static const char *const texts[2] = {
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"Internal",
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@ -700,27 +753,115 @@ static int snd_mbox1_switch_info(struct snd_kcontrol *kcontrol,
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return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
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}
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static int snd_mbox1_switch_resume(struct usb_mixer_elem_list *list)
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static int snd_mbox1_clk_switch_resume(struct usb_mixer_elem_list *list)
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{
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return snd_mbox1_switch_update(list->mixer, list->kctl->private_value);
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return snd_mbox1_clk_switch_update(list->mixer, list->kctl->private_value);
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}
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static const struct snd_kcontrol_new snd_mbox1_switch = {
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/* Digidesign Mbox 1 input source switch (analog/spdif) */
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static int snd_mbox1_src_switch_get(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_value *ucontrol)
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{
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ucontrol->value.enumerated.item[0] = kctl->private_value;
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return 0;
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}
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static int snd_mbox1_src_switch_update(struct usb_mixer_interface *mixer, int is_spdif_input)
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{
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struct snd_usb_audio *chip = mixer->chip;
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int err;
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err = snd_usb_lock_shutdown(chip);
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if (err < 0)
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return err;
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err = snd_mbox1_is_spdif_input(chip);
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if (err < 0)
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goto err;
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err = snd_mbox1_set_input_source(chip, is_spdif_input);
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if (err < 0)
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goto err;
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err = snd_mbox1_is_spdif_input(chip);
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if (err < 0)
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goto err;
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err = snd_mbox1_is_spdif_synced(chip);
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err:
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snd_usb_unlock_shutdown(chip);
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return err;
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}
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static int snd_mbox1_src_switch_put(struct snd_kcontrol *kctl,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct usb_mixer_elem_list *list = snd_kcontrol_chip(kctl);
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struct usb_mixer_interface *mixer = list->mixer;
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int err;
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bool cur_val, new_val;
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cur_val = kctl->private_value;
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new_val = ucontrol->value.enumerated.item[0];
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if (cur_val == new_val)
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return 0;
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kctl->private_value = new_val;
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err = snd_mbox1_src_switch_update(mixer, new_val);
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return err < 0 ? err : 1;
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}
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static int snd_mbox1_src_switch_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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static const char *const texts[2] = {
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"Analog",
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"S/PDIF"
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};
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return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
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}
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static int snd_mbox1_src_switch_resume(struct usb_mixer_elem_list *list)
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{
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return snd_mbox1_src_switch_update(list->mixer, list->kctl->private_value);
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}
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static const struct snd_kcontrol_new snd_mbox1_clk_switch = {
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Clock Source",
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.index = 0,
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
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.info = snd_mbox1_switch_info,
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.get = snd_mbox1_switch_get,
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.put = snd_mbox1_switch_put,
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.info = snd_mbox1_clk_switch_info,
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.get = snd_mbox1_clk_switch_get,
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.put = snd_mbox1_clk_switch_put,
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.private_value = 0
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};
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static int snd_mbox1_create_sync_switch(struct usb_mixer_interface *mixer)
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static const struct snd_kcontrol_new snd_mbox1_src_switch = {
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
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.name = "Input Source",
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.index = 1,
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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
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.info = snd_mbox1_src_switch_info,
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.get = snd_mbox1_src_switch_get,
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.put = snd_mbox1_src_switch_put,
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.private_value = 0
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};
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static int snd_mbox1_controls_create(struct usb_mixer_interface *mixer)
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{
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return add_single_ctl_with_resume(mixer, 0,
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snd_mbox1_switch_resume,
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&snd_mbox1_switch, NULL);
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int err;
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err = add_single_ctl_with_resume(mixer, 0,
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snd_mbox1_clk_switch_resume,
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&snd_mbox1_clk_switch, NULL);
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if (err < 0)
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return err;
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return add_single_ctl_with_resume(mixer, 1,
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snd_mbox1_src_switch_resume,
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&snd_mbox1_src_switch, NULL);
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}
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/* Native Instruments device quirks */
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@ -3029,7 +3170,7 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
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break;
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case USB_ID(0x0dba, 0x1000): /* Digidesign Mbox 1 */
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err = snd_mbox1_create_sync_switch(mixer);
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err = snd_mbox1_controls_create(mixer);
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break;
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case USB_ID(0x17cc, 0x1011): /* Traktor Audio 6 */
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