From dbbd4f9ea06612f78261d3a9b6bc74ed5770537d Mon Sep 17 00:00:00 2001 From: "Geoffrey D. Bennett" Date: Wed, 23 Jun 2021 02:32:36 +0930 Subject: [PATCH] ALSA: usb-audio: scarlett2: Add "air" switch support Some inputs on Gen 3 models have an "air" feature which can be enabled from the driver or (model-dependent) from the front panel. Add support for getting and setting the state of those switches. Signed-off-by: Geoffrey D. Bennett Link: https://lore.kernel.org/r/44d448a4150b9c068754759c9fdd2bfe21484487.1624379707.git.g@b4.vu Signed-off-by: Takashi Iwai --- sound/usb/mixer_scarlett_gen2.c | 106 ++++++++++++++++++++++++++++++-- 1 file changed, 100 insertions(+), 6 deletions(-) diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 0a56211a65ab..696d9703436a 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -53,7 +53,7 @@ * - mixer-matrix gain stages * - gain/volume/mute controls * - level meters - * - line/inst level and pad controls + * - line/inst level, pad, and air controls * - disable/enable MSD mode * * @@ -173,6 +173,7 @@ static const u16 scarlett2_mixer_values[SCARLETT2_MIXER_VALUE_COUNT] = { /* Maximum number of level and pad switches */ #define SCARLETT2_LEVEL_SWITCH_MAX 2 #define SCARLETT2_PAD_SWITCH_MAX 8 +#define SCARLETT2_AIR_SWITCH_MAX 8 /* Maximum number of inputs to the mixer */ #define SCARLETT2_INPUT_MIX_MAX 25 @@ -322,6 +323,11 @@ struct scarlett2_device_info { */ u8 pad_input_count; + /* the number of analogue inputs with a software switchable + * "air" control + */ + u8 air_input_count; + /* additional description for the line out volume controls */ const char * const line_out_descrs[SCARLETT2_ANALOGUE_MAX]; @@ -357,6 +363,7 @@ struct scarlett2_data { u8 level_switch[SCARLETT2_LEVEL_SWITCH_MAX]; u8 pad_switch[SCARLETT2_PAD_SWITCH_MAX]; u8 dim_mute[SCARLETT2_DIM_MUTE_COUNT]; + u8 air_switch[SCARLETT2_AIR_SWITCH_MAX]; u8 msd_switch; struct snd_kcontrol *sync_ctl; struct snd_kcontrol *master_vol_ctl; @@ -365,6 +372,7 @@ struct scarlett2_data { struct snd_kcontrol *dim_mute_ctls[SCARLETT2_DIM_MUTE_COUNT]; struct snd_kcontrol *level_ctls[SCARLETT2_LEVEL_SWITCH_MAX]; struct snd_kcontrol *pad_ctls[SCARLETT2_PAD_SWITCH_MAX]; + struct snd_kcontrol *air_ctls[SCARLETT2_AIR_SWITCH_MAX]; u8 mux[SCARLETT2_MUX_MAX]; u8 mix[SCARLETT2_INPUT_MIX_MAX * SCARLETT2_OUTPUT_MIX_MAX]; }; @@ -526,6 +534,7 @@ static const struct scarlett2_device_info solo_gen3_info = { .has_msd_mode = 1, .level_input_count = 1, .level_input_first = 1, + .air_input_count = 1, }; static const struct scarlett2_device_info s2i2_gen3_info = { @@ -533,6 +542,7 @@ static const struct scarlett2_device_info s2i2_gen3_info = { .has_msd_mode = 1, .level_input_count = 2, + .air_input_count = 2, }; static const struct scarlett2_device_info s4i4_gen3_info = { @@ -542,6 +552,7 @@ static const struct scarlett2_device_info s4i4_gen3_info = { .has_mixer = 1, .level_input_count = 2, .pad_input_count = 2, + .air_input_count = 2, .line_out_descrs = { "Monitor L", @@ -585,6 +596,7 @@ static const struct scarlett2_device_info s8i6_gen3_info = { .has_mixer = 1, .level_input_count = 2, .pad_input_count = 2, + .air_input_count = 2, .line_out_descrs = { "Headphones 1 L", @@ -636,6 +648,7 @@ static const struct scarlett2_device_info s18i8_gen3_info = { .line_out_hw_vol = 1, .level_input_count = 2, .pad_input_count = 2, + .air_input_count = 4, .line_out_descrs = { "Monitor L", @@ -699,6 +712,7 @@ static const struct scarlett2_device_info s18i20_gen3_info = { .line_out_hw_vol = 1, .level_input_count = 2, .pad_input_count = 8, + .air_input_count = 8, .line_out_descrs = { "Monitor 1 L", @@ -846,7 +860,8 @@ enum { SCARLETT2_CONFIG_LEVEL_SWITCH = 4, SCARLETT2_CONFIG_PAD_SWITCH = 5, SCARLETT2_CONFIG_MSD_SWITCH = 6, - SCARLETT2_CONFIG_COUNT = 7 + SCARLETT2_CONFIG_AIR_SWITCH = 7, + SCARLETT2_CONFIG_COUNT = 8 }; /* Location, size, and activation command number for the configuration @@ -872,6 +887,9 @@ static const struct scarlett2_config [SCARLETT2_CONFIG_LEVEL_SWITCH] = { .offset = 0x08, .size = 1, .activate = 7 }, + [SCARLETT2_CONFIG_AIR_SWITCH] = { + .offset = 0x09, .size = 1, .activate = 8 }, + /* Devices with a mixer (Gen 2 and all other Gen 3) */ }, { [SCARLETT2_CONFIG_DIM_MUTE] = { @@ -892,6 +910,9 @@ static const struct scarlett2_config [SCARLETT2_CONFIG_PAD_SWITCH] = { .offset = 0x84, .size = 8, .activate = 8 }, + [SCARLETT2_CONFIG_AIR_SWITCH] = { + .offset = 0x8c, .size = 8, .activate = 8 }, + [SCARLETT2_CONFIG_MSD_SWITCH] = { .offset = 0x9d, .size = 8, .activate = 6 }, } }; @@ -1100,9 +1121,7 @@ static void scarlett2_config_save_work(struct work_struct *work) scarlett2_config_save(private->mixer); } -/* Send a USB message to set a configuration parameter (volume level, - * sw/hw volume switch, line/inst level switch, or pad switch) - */ +/* Send a USB message to set a SCARLETT2_CONFIG_* parameter */ static int scarlett2_usb_set_config( struct usb_mixer_interface *mixer, int config_item_num, int index, int value) @@ -1900,6 +1919,14 @@ static int scarlett2_update_input_other(struct usb_mixer_interface *mixer) return err; } + if (info->air_input_count) { + int err = scarlett2_usb_get_config( + mixer, SCARLETT2_CONFIG_AIR_SWITCH, + info->air_input_count, private->air_switch); + if (err < 0) + return err; + } + return 0; } @@ -2030,6 +2057,61 @@ static const struct snd_kcontrol_new scarlett2_pad_ctl = { .put = scarlett2_pad_ctl_put, }; +/*** Air Switch Controls ***/ + +static int scarlett2_air_ctl_get(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; + + mutex_lock(&private->data_mutex); + if (private->input_other_updated) + scarlett2_update_input_other(mixer); + ucontrol->value.integer.value[0] = private->air_switch[elem->control]; + mutex_unlock(&private->data_mutex); + + return 0; +} + +static int scarlett2_air_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 index = elem->control; + int oval, val, err = 0; + + mutex_lock(&private->data_mutex); + + oval = private->air_switch[index]; + val = !!ucontrol->value.integer.value[0]; + + if (oval == val) + goto unlock; + + private->air_switch[index] = val; + + /* Send switch change to the device */ + err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_AIR_SWITCH, + index, val); + +unlock: + mutex_unlock(&private->data_mutex); + return err; +} + +static const struct snd_kcontrol_new scarlett2_air_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "", + .info = snd_ctl_boolean_mono_info, + .get = scarlett2_air_ctl_get, + .put = scarlett2_air_ctl_put, +}; + /*** Dim/Mute Controls ***/ static int scarlett2_dim_mute_ctl_get(struct snd_kcontrol *kctl, @@ -2213,6 +2295,15 @@ static int scarlett2_add_line_in_ctls(struct usb_mixer_interface *mixer) return err; } + /* Add input air controls */ + for (i = 0; i < info->air_input_count; i++) { + snprintf(s, sizeof(s), fmt, i + 1, "Air", "Switch"); + err = scarlett2_add_new_ctl(mixer, &scarlett2_air_ctl, + i, 1, s, &private->air_ctls[i]); + if (err < 0) + return err; + } + return 0; } @@ -2821,7 +2912,7 @@ static void scarlett2_notify_dim_mute( &private->mute_ctls[i]->id); } -/* Notify on "input other" change (level/pad) */ +/* Notify on "input other" change (level/pad/air) */ static void scarlett2_notify_input_other( struct usb_mixer_interface *mixer) { @@ -2838,6 +2929,9 @@ static void scarlett2_notify_input_other( for (i = 0; i < info->pad_input_count; i++) snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &private->pad_ctls[i]->id); + for (i = 0; i < info->air_input_count; i++) + snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, + &private->air_ctls[i]->id); } /* Interrupt callback */