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ALSA: scarlett2: Add minimum firmware version check
Early firmware for the Scarlett Gen 4 devices has sufficient differences that it is better to enforce a minimum firmware version than to try and work around those differences. Add a minimum firmware version field to the device info struct, and display a message if the firmware version is too old. Only create the Firmware Version and MSD (optional) controls in this case. Signed-off-by: Geoffrey D. Bennett <g@b4.vu> Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/5455a7e54bda81556066abd7f761b10e9c5f8a16.1703612638.git.g@b4.vu
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@ -660,6 +660,9 @@ struct scarlett2_device_info {
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/* which set of configuration parameters the device uses */
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const struct scarlett2_config_set *config_set;
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/* minimum firmware version required */
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u16 min_firmware_version;
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/* support for main/alt speaker switching */
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u8 has_speaker_switching;
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@ -2352,6 +2355,45 @@ static int scarlett2_add_firmware_version_ctl(
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0, 0, "Firmware Version", NULL);
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}
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/*** Minimum Firmware Version Control ***/
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static int scarlett2_min_firmware_version_ctl_get(
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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_info *elem = kctl->private_data;
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struct scarlett2_data *private = elem->head.mixer->private_data;
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ucontrol->value.integer.value[0] = private->info->min_firmware_version;
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return 0;
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}
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static int scarlett2_min_firmware_version_ctl_info(
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struct snd_kcontrol *kctl,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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return 0;
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}
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static const struct snd_kcontrol_new scarlett2_min_firmware_version_ctl = {
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.iface = SNDRV_CTL_ELEM_IFACE_CARD,
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.access = SNDRV_CTL_ELEM_ACCESS_READ,
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.name = "",
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.info = scarlett2_min_firmware_version_ctl_info,
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.get = scarlett2_min_firmware_version_ctl_get
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};
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static int scarlett2_add_min_firmware_version_ctl(
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struct usb_mixer_interface *mixer)
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{
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return scarlett2_add_new_ctl(mixer, &scarlett2_min_firmware_version_ctl,
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0, 0, "Minimum Firmware Version", NULL);
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}
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/*** Sync Control ***/
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/* Update sync control after receiving notification that the status
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@ -6061,6 +6103,7 @@ static int scarlett2_get_flash_segment_nums(struct usb_mixer_interface *mixer)
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static int scarlett2_read_configs(struct usb_mixer_interface *mixer)
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{
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struct scarlett2_data *private = mixer->private_data;
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const struct scarlett2_device_info *info = private->info;
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int err, i;
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if (scarlett2_has_config_item(private, SCARLETT2_CONFIG_MSD_SWITCH)) {
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@ -6069,12 +6112,22 @@ static int scarlett2_read_configs(struct usb_mixer_interface *mixer)
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1, &private->msd_switch);
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if (err < 0)
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return err;
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/* no other controls are created if MSD mode is on */
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if (private->msd_switch)
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return 0;
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}
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if (private->firmware_version < info->min_firmware_version) {
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usb_audio_err(mixer->chip,
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"Focusrite %s firmware version %d is too old; "
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"need %d",
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private->series_name,
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private->firmware_version,
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info->min_firmware_version);
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return 0;
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}
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/* no other controls are created if MSD mode is on */
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if (private->msd_switch)
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return 0;
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err = scarlett2_update_input_level(mixer);
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if (err < 0)
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return err;
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@ -6595,6 +6648,11 @@ static int snd_scarlett2_controls_create(
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if (err < 0)
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return err;
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/* Add minimum firmware version control */
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err = scarlett2_add_min_firmware_version_ctl(mixer);
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if (err < 0)
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return err;
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/* Read volume levels and controls from the interface */
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err = scarlett2_read_configs(mixer);
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if (err < 0)
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@ -6605,8 +6663,11 @@ static int snd_scarlett2_controls_create(
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if (err < 0)
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return err;
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/* If MSD mode is enabled, don't create any other controls */
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if (private->msd_switch)
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/* If MSD mode is enabled, or if the firmware version is too
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* old, don't create any other controls
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*/
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if (private->msd_switch ||
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private->firmware_version < private->info->min_firmware_version)
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return 0;
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/* Create the analogue output controls */
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