[PATCH 0/2] ALSA: scarlett2: Add "Standalone" switch
Hi Takashi,
I discovered an internal "standalone" switch on all the Scarlett Gen 2/3 interfaces with internal mixers. After enabling this switch, the interface will act as a standalone mixer (according to its previous configuration) when not connected to a USB host. The interfaces come from the factory with the switch off, and the vendor driver enables it without question. This patch adds a new ALSA control to set the switch on or off.
This is the first configuration item that is common between the Gen 2 and 3 interfaces but with a different offset, so the patch is in two parts. The first patch allows for the same configuration item to have a different offset between Gen 2/3 and the second patch adds the new switch.
Regards, Geoffrey.
Geoffrey D. Bennett (2): ALSA: scarlett2: Split scarlett2_config_items[] into 3 sections ALSA: scarlett2: Add support for the internal "standalone" switch
sound/usb/mixer_scarlett_gen2.c | 171 ++++++++++++++++++++++++++------ 1 file changed, 141 insertions(+), 30 deletions(-)
scarlett2_config_items[] contains the parameters for the configuration items. The driver previously had two sets of configurations items; one for devices with no mixer, and one for devices with a mixer. This patch splits the latter into two (one set for Gen 2 devices and one set for Gen 3 devices) in preparation for a new item (standalone) which is present in both but with a different offset.
Signed-off-by: Geoffrey D. Bennett g@b4.vu --- sound/usb/mixer_scarlett_gen2.c | 74 +++++++++++++++++++++++---------- 1 file changed, 51 insertions(+), 23 deletions(-)
diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 53ebabf42472..22e442208550 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -6,7 +6,7 @@ * - 6i6/18i8/18i20 Gen 2 * - Solo/2i2/4i4/8i6/18i8/18i20 Gen 3 * - * Copyright (c) 2018-2021 by Geoffrey D. Bennett <g at b4.vu> + * Copyright (c) 2018-2022 by Geoffrey D. Bennett <g at b4.vu> * Copyright (c) 2020-2021 by Vladimir Sadovnikov sadko4u@gmail.com * * Based on the Scarlett (Gen 1) Driver for ALSA: @@ -195,6 +195,16 @@ static const u16 scarlett2_mixer_values[SCARLETT2_MIXER_VALUE_COUNT] = { /* Maximum number of meters (sum of output port counts) */ #define SCARLETT2_MAX_METERS 65
+/* There are three different sets of configuration parameters across + * the devices + */ +enum { + SCARLETT2_CONFIG_SET_NO_MIXER = 0, + SCARLETT2_CONFIG_SET_GEN_2 = 1, + SCARLETT2_CONFIG_SET_GEN_3 = 2, + SCARLETT2_CONFIG_SET_COUNT = 3 +}; + /* Hardware port types: * - None (no input to mux) * - Analogue I/O @@ -308,10 +318,8 @@ struct scarlett2_device_info { */ u8 has_msd_mode;
- /* Gen 3 devices without a mixer have a different - * configuration set - */ - u8 has_mixer; + /* which set of configuration parameters the device uses */ + u8 config_set;
/* line out hw volume is sw controlled */ u8 line_out_hw_vol; @@ -426,7 +434,7 @@ struct scarlett2_data { static const struct scarlett2_device_info s6i6_gen2_info = { .usb_id = USB_ID(0x1235, 0x8203),
- .has_mixer = 1, + .config_set = SCARLETT2_CONFIG_SET_GEN_2, .level_input_count = 2, .pad_input_count = 2,
@@ -472,7 +480,7 @@ static const struct scarlett2_device_info s6i6_gen2_info = { static const struct scarlett2_device_info s18i8_gen2_info = { .usb_id = USB_ID(0x1235, 0x8204),
- .has_mixer = 1, + .config_set = SCARLETT2_CONFIG_SET_GEN_2, .level_input_count = 2, .pad_input_count = 4,
@@ -521,7 +529,7 @@ static const struct scarlett2_device_info s18i8_gen2_info = { static const struct scarlett2_device_info s18i20_gen2_info = { .usb_id = USB_ID(0x1235, 0x8201),
- .has_mixer = 1, + .config_set = SCARLETT2_CONFIG_SET_GEN_2, .line_out_hw_vol = 1,
.line_out_descrs = { @@ -576,6 +584,7 @@ static const struct scarlett2_device_info solo_gen3_info = { .usb_id = USB_ID(0x1235, 0x8211),
.has_msd_mode = 1, + .config_set = SCARLETT2_CONFIG_SET_NO_MIXER, .level_input_count = 1, .level_input_first = 1, .air_input_count = 1, @@ -588,6 +597,7 @@ static const struct scarlett2_device_info s2i2_gen3_info = { .usb_id = USB_ID(0x1235, 0x8210),
.has_msd_mode = 1, + .config_set = SCARLETT2_CONFIG_SET_NO_MIXER, .level_input_count = 2, .air_input_count = 2, .phantom_count = 1, @@ -599,7 +609,7 @@ static const struct scarlett2_device_info s4i4_gen3_info = { .usb_id = USB_ID(0x1235, 0x8212),
.has_msd_mode = 1, - .has_mixer = 1, + .config_set = SCARLETT2_CONFIG_SET_GEN_3, .level_input_count = 2, .pad_input_count = 2, .air_input_count = 2, @@ -645,7 +655,7 @@ static const struct scarlett2_device_info s8i6_gen3_info = { .usb_id = USB_ID(0x1235, 0x8213),
.has_msd_mode = 1, - .has_mixer = 1, + .config_set = SCARLETT2_CONFIG_SET_GEN_3, .level_input_count = 2, .pad_input_count = 2, .air_input_count = 2, @@ -698,7 +708,7 @@ static const struct scarlett2_device_info s18i8_gen3_info = { .usb_id = USB_ID(0x1235, 0x8214),
.has_msd_mode = 1, - .has_mixer = 1, + .config_set = SCARLETT2_CONFIG_SET_GEN_3, .line_out_hw_vol = 1, .has_speaker_switching = 1, .level_input_count = 2, @@ -768,7 +778,7 @@ static const struct scarlett2_device_info s18i20_gen3_info = { .usb_id = USB_ID(0x1235, 0x8215),
.has_msd_mode = 1, - .has_mixer = 1, + .config_set = SCARLETT2_CONFIG_SET_GEN_3, .line_out_hw_vol = 1, .has_speaker_switching = 1, .has_talkback = 1, @@ -944,13 +954,11 @@ struct scarlett2_config { u8 activate; };
-/* scarlett2_config_items[0] is for devices without a mixer - * scarlett2_config_items[1] is for devices with a mixer - */ static const struct scarlett2_config - scarlett2_config_items[2][SCARLETT2_CONFIG_COUNT] = + scarlett2_config_items[SCARLETT2_CONFIG_SET_COUNT] + [SCARLETT2_CONFIG_COUNT] =
-/* Devices without a mixer (Solo and 2i2 Gen 3) */ +/* Devices without a mixer (Gen 3 Solo and 2i2) */ { { [SCARLETT2_CONFIG_MSD_SWITCH] = { .offset = 0x04, .size = 8, .activate = 6 }, @@ -970,7 +978,27 @@ static const struct scarlett2_config [SCARLETT2_CONFIG_AIR_SWITCH] = { .offset = 0x09, .size = 1, .activate = 8 },
-/* Devices with a mixer (Gen 2 and all other Gen 3) */ +/* Gen 2 devices: 6i6, 18i8, 18i20 */ +}, { + [SCARLETT2_CONFIG_DIM_MUTE] = { + .offset = 0x31, .size = 8, .activate = 2 }, + + [SCARLETT2_CONFIG_LINE_OUT_VOLUME] = { + .offset = 0x34, .size = 16, .activate = 1 }, + + [SCARLETT2_CONFIG_MUTE_SWITCH] = { + .offset = 0x5c, .size = 8, .activate = 1 }, + + [SCARLETT2_CONFIG_SW_HW_SWITCH] = { + .offset = 0x66, .size = 8, .activate = 3 }, + + [SCARLETT2_CONFIG_LEVEL_SWITCH] = { + .offset = 0x7c, .size = 8, .activate = 7 }, + + [SCARLETT2_CONFIG_PAD_SWITCH] = { + .offset = 0x84, .size = 8, .activate = 8 }, + +/* Gen 3 devices: 4i4, 8i6, 18i8, 18i20 */ }, { [SCARLETT2_CONFIG_DIM_MUTE] = { .offset = 0x31, .size = 8, .activate = 2 }, @@ -1175,7 +1203,7 @@ static int scarlett2_usb_get_config( struct scarlett2_data *private = mixer->private_data; const struct scarlett2_device_info *info = private->info; const struct scarlett2_config *config_item = - &scarlett2_config_items[info->has_mixer][config_item_num]; + &scarlett2_config_items[info->config_set][config_item_num]; int size, err, i; u8 *buf_8; u8 value; @@ -1235,7 +1263,7 @@ static int scarlett2_usb_set_config( struct scarlett2_data *private = mixer->private_data; const struct scarlett2_device_info *info = private->info; const struct scarlett2_config *config_item = - &scarlett2_config_items[info->has_mixer][config_item_num]; + &scarlett2_config_items[info->config_set][config_item_num]; struct { __le32 offset; __le32 bytes; @@ -1692,7 +1720,7 @@ static int scarlett2_add_sync_ctl(struct usb_mixer_interface *mixer) struct scarlett2_data *private = mixer->private_data;
/* devices without a mixer also don't support reporting sync status */ - if (!private->info->has_mixer) + if (private->info->config_set == SCARLETT2_CONFIG_SET_NO_MIXER) return 0;
return scarlett2_add_new_ctl(mixer, &scarlett2_sync_ctl, @@ -3399,7 +3427,7 @@ static int scarlett2_add_meter_ctl(struct usb_mixer_interface *mixer) struct scarlett2_data *private = mixer->private_data;
/* devices without a mixer also don't support reporting levels */ - if (!private->info->has_mixer) + if (private->info->config_set == SCARLETT2_CONFIG_SET_NO_MIXER) return 0;
return scarlett2_add_new_ctl(mixer, &scarlett2_meter_ctl, @@ -3632,7 +3660,7 @@ static int scarlett2_read_configs(struct usb_mixer_interface *mixer) return err;
/* the rest of the configuration is for devices with a mixer */ - if (!info->has_mixer) + if (info->config_set == SCARLETT2_CONFIG_SET_NO_MIXER) return 0;
err = scarlett2_update_sync(mixer);
The Focusrite Scarlett Gen 2/3 interfaces with internal mixers have a "standalone" mode. When the interface is not connected to a USB host and standalone mode is enabled, the interface will pass audio as previously configured. This patch adds an ALSA control to allow enabling/disabling that mode.
Signed-off-by: Geoffrey D. Bennett g@b4.vu --- sound/usb/mixer_scarlett_gen2.c | 97 ++++++++++++++++++++++++++++++--- 1 file changed, 90 insertions(+), 7 deletions(-)
diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 22e442208550..710586c8dedc 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -60,6 +60,7 @@ * - phantom power, direct monitor, speaker switching, and talkback * controls * - disable/enable MSD mode + * - disable/enable standalone mode * * <ditaa> * /--------------\ 18chn 20chn /--------------\ @@ -411,6 +412,7 @@ struct scarlett2_data { u8 talkback_switch; u8 talkback_map[SCARLETT2_OUTPUT_MIX_MAX]; u8 msd_switch; + u8 standalone_switch; struct snd_kcontrol *sync_ctl; struct snd_kcontrol *master_vol_ctl; struct snd_kcontrol *vol_ctls[SCARLETT2_ANALOGUE_MAX]; @@ -936,13 +938,14 @@ enum { SCARLETT2_CONFIG_PAD_SWITCH = 5, SCARLETT2_CONFIG_MSD_SWITCH = 6, SCARLETT2_CONFIG_AIR_SWITCH = 7, - SCARLETT2_CONFIG_PHANTOM_SWITCH = 8, - SCARLETT2_CONFIG_PHANTOM_PERSISTENCE = 9, - SCARLETT2_CONFIG_DIRECT_MONITOR = 10, - SCARLETT2_CONFIG_MONITOR_OTHER_SWITCH = 11, - SCARLETT2_CONFIG_MONITOR_OTHER_ENABLE = 12, - SCARLETT2_CONFIG_TALKBACK_MAP = 13, - SCARLETT2_CONFIG_COUNT = 14 + SCARLETT2_CONFIG_STANDALONE_SWITCH = 8, + SCARLETT2_CONFIG_PHANTOM_SWITCH = 9, + SCARLETT2_CONFIG_PHANTOM_PERSISTENCE = 10, + SCARLETT2_CONFIG_DIRECT_MONITOR = 11, + SCARLETT2_CONFIG_MONITOR_OTHER_SWITCH = 12, + SCARLETT2_CONFIG_MONITOR_OTHER_ENABLE = 13, + SCARLETT2_CONFIG_TALKBACK_MAP = 14, + SCARLETT2_CONFIG_COUNT = 15 };
/* Location, size, and activation command number for the configuration @@ -998,6 +1001,9 @@ static const struct scarlett2_config [SCARLETT2_CONFIG_PAD_SWITCH] = { .offset = 0x84, .size = 8, .activate = 8 },
+ [SCARLETT2_CONFIG_STANDALONE_SWITCH] = { + .offset = 0x8d, .size = 8, .activate = 6 }, + /* Gen 3 devices: 4i4, 8i6, 18i8, 18i20 */ }, { [SCARLETT2_CONFIG_DIM_MUTE] = { @@ -1021,6 +1027,9 @@ static const struct scarlett2_config [SCARLETT2_CONFIG_AIR_SWITCH] = { .offset = 0x8c, .size = 8, .activate = 8 },
+ [SCARLETT2_CONFIG_STANDALONE_SWITCH] = { + .offset = 0x95, .size = 8, .activate = 6 }, + [SCARLETT2_CONFIG_PHANTOM_SWITCH] = { .offset = 0x9c, .size = 1, .activate = 8 },
@@ -3502,6 +3511,69 @@ static int scarlett2_add_msd_ctl(struct usb_mixer_interface *mixer) 0, 1, "MSD Mode Switch", NULL); }
+/*** Standalone Control ***/ + +static int scarlett2_standalone_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_data *private = elem->head.mixer->private_data; + + ucontrol->value.integer.value[0] = private->standalone_switch; + return 0; +} + +static int scarlett2_standalone_ctl_put(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct usb_mixer_interface *mixer = elem->head.mixer; + struct scarlett2_data *private = mixer->private_data; + + int oval, val, err = 0; + + mutex_lock(&private->data_mutex); + + oval = private->standalone_switch; + val = !!ucontrol->value.integer.value[0]; + + if (oval == val) + goto unlock; + + private->standalone_switch = val; + + /* Send switch change to the device */ + err = scarlett2_usb_set_config(mixer, + SCARLETT2_CONFIG_STANDALONE_SWITCH, + 0, val); + if (err == 0) + err = 1; + +unlock: + mutex_unlock(&private->data_mutex); + return err; +} + +static const struct snd_kcontrol_new scarlett2_standalone_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "", + .info = snd_ctl_boolean_mono_info, + .get = scarlett2_standalone_ctl_get, + .put = scarlett2_standalone_ctl_put, +}; + +static int scarlett2_add_standalone_ctl(struct usb_mixer_interface *mixer) +{ + struct scarlett2_data *private = mixer->private_data; + + if (private->info->config_set == SCARLETT2_CONFIG_SET_NO_MIXER) + return 0; + + /* Add standalone control */ + return scarlett2_add_new_ctl(mixer, &scarlett2_standalone_ctl, + 0, 1, "Standalone Switch", NULL); +} + /*** Cleanup/Suspend Callbacks ***/
static void scarlett2_private_free(struct usb_mixer_interface *mixer) @@ -3663,6 +3735,12 @@ static int scarlett2_read_configs(struct usb_mixer_interface *mixer) if (info->config_set == SCARLETT2_CONFIG_SET_NO_MIXER) return 0;
+ err = scarlett2_usb_get_config( + mixer, SCARLETT2_CONFIG_STANDALONE_SWITCH, + 1, &private->standalone_switch); + if (err < 0) + return err; + err = scarlett2_update_sync(mixer); if (err < 0) return err; @@ -3985,6 +4063,11 @@ static int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer) if (err < 0) return err;
+ /* Create the standalone control */ + err = scarlett2_add_standalone_ctl(mixer); + if (err < 0) + return err; + /* Set up the interrupt polling */ err = scarlett2_init_notify(mixer); if (err < 0)
On Sun, 06 Mar 2022 16:20:40 +0100, Geoffrey D. Bennett wrote:
Hi Takashi,
I discovered an internal "standalone" switch on all the Scarlett Gen 2/3 interfaces with internal mixers. After enabling this switch, the interface will act as a standalone mixer (according to its previous configuration) when not connected to a USB host. The interfaces come from the factory with the switch off, and the vendor driver enables it without question. This patch adds a new ALSA control to set the switch on or off.
This is the first configuration item that is common between the Gen 2 and 3 interfaces but with a different offset, so the patch is in two parts. The first patch allows for the same configuration item to have a different offset between Gen 2/3 and the second patch adds the new switch.
Regards, Geoffrey.
Geoffrey D. Bennett (2): ALSA: scarlett2: Split scarlett2_config_items[] into 3 sections ALSA: scarlett2: Add support for the internal "standalone" switch
Thanks, applied both patches now.
Takashi
participants (2)
-
Geoffrey D. Bennett -
Takashi Iwai