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linuxdebug/sound/usb/mixer_scarlett.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Scarlett Driver for ALSA
*
* Copyright (c) 2013 by Tobias Hoffmann
* Copyright (c) 2013 by Robin Gareus <robin at gareus.org>
* Copyright (c) 2002 by Takashi Iwai <tiwai at suse.de>
* Copyright (c) 2014 by Chris J Arges <chris.j.arges at canonical.com>
*
* Many codes borrowed from audio.c by
* Alan Cox (alan at lxorguk.ukuu.org.uk)
* Thomas Sailer (sailer at ife.ee.ethz.ch)
*
* Code cleanup:
* David Henningsson <david.henningsson at canonical.com>
*/
/*
* Rewritten and extended to support more models, e.g. Scarlett 18i8.
*
* Auto-detection via UAC2 is not feasible to properly discover the vast
* majority of features. It's related to both Linux/ALSA's UAC2 as well as
* Focusrite's implementation of it. Eventually quirks may be sufficient but
* right now it's a major headache to work around these things.
*
* NB. Neither the OSX nor the win driver provided by Focusrite performs
* discovery, they seem to operate the same as this driver.
*/
/* Mixer Interface for the Focusrite Scarlett 18i6 audio interface.
*
* The protocol was reverse engineered by looking at communication between
* Scarlett MixControl (v 1.2.128.0) and the Focusrite(R) Scarlett 18i6
* (firmware v305) using wireshark and usbmon in January 2013.
* Extended in July 2013.
*
* this mixer gives complete access to all features of the device:
* - change Impedance of inputs (Line-in, Mic / Instrument, Hi-Z)
* - select clock source
* - dynamic input to mixer-matrix assignment
* - 18 x 6 mixer-matrix gain stages
* - bus routing & volume control
* - automatic re-initialization on connect if device was power-cycled
*
* USB URB commands overview (bRequest = 0x01 = UAC2_CS_CUR)
* wIndex
* 0x01 Analog Input line/instrument impedance switch, wValue=0x0901 +
* channel, data=Line/Inst (2bytes)
* pad (-10dB) switch, wValue=0x0b01 + channel, data=Off/On (2bytes)
* ?? wValue=0x0803/04, ?? (2bytes)
* 0x0a Master Volume, wValue=0x0200+bus[0:all + only 1..4?] data(2bytes)
* Bus Mute/Unmute wValue=0x0100+bus[0:all + only 1..4?], data(2bytes)
* 0x28 Clock source, wValue=0x0100, data={1:int,2:spdif,3:adat} (1byte)
* 0x29 Set Sample-rate, wValue=0x0100, data=sample-rate(4bytes)
* 0x32 Mixer mux, wValue=0x0600 + mixer-channel, data=input-to-connect(2bytes)
* 0x33 Output mux, wValue=bus, data=input-to-connect(2bytes)
* 0x34 Capture mux, wValue=0...18, data=input-to-connect(2bytes)
* 0x3c Matrix Mixer gains, wValue=mixer-node data=gain(2bytes)
* ?? [sometimes](4bytes, e.g 0x000003be 0x000003bf ...03ff)
*
* USB reads: (i.e. actually issued by original software)
* 0x01 wValue=0x0901+channel (1byte!!), wValue=0x0b01+channed (1byte!!)
* 0x29 wValue=0x0100 sample-rate(4bytes)
* wValue=0x0200 ?? 1byte (only once)
* 0x2a wValue=0x0100 ?? 4bytes, sample-rate2 ??
*
* USB reads with bRequest = 0x03 = UAC2_CS_MEM
* 0x3c wValue=0x0002 1byte: sync status (locked=1)
* wValue=0x0000 18*2byte: peak meter (inputs)
* wValue=0x0001 8(?)*2byte: peak meter (mix)
* wValue=0x0003 6*2byte: peak meter (pcm/daw)
*
* USB write with bRequest = 0x03
* 0x3c Save settings to hardware: wValue=0x005a, data=0xa5
*
*
* <ditaa>
* /--------------\ 18chn 6chn /--------------\
* | Hardware in +--+-------\ /------+--+ ALSA PCM out |
* \--------------/ | | | | \--------------/
* | | | |
* | v v |
* | +---------------+ |
* | \ Matrix Mux / |
* | +-----+-----+ |
* | | |
* | | 18chn |
* | v |
* | +-----------+ |
* | | Mixer | |
* | | Matrix | |
* | | | |
* | | 18x6 Gain | |
* | | stages | |
* | +-----+-----+ |
* | | |
* | | |
* | 18chn | 6chn | 6chn
* v v v
* =========================
* +---------------+ +--—------------+
* \ Output Mux / \ Capture Mux /
* +-----+-----+ +-----+-----+
* | |
* | 6chn |
* v |
* +-------------+ |
* | Master Gain | |
* +------+------+ |
* | |
* | 6chn | 18chn
* | (3 stereo pairs) |
* /--------------\ | | /--------------\
* | Hardware out |<--/ \-->| ALSA PCM in |
* \--------------/ \--------------/
* </ditaa>
*
*/
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/audio-v2.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include "usbaudio.h"
#include "mixer.h"
#include "helper.h"
#include "power.h"
#include "mixer_scarlett.h"
/* some gui mixers can't handle negative ctl values */
#define SND_SCARLETT_LEVEL_BIAS 128
#define SND_SCARLETT_MATRIX_IN_MAX 18
#define SND_SCARLETT_CONTROLS_MAX 10
#define SND_SCARLETT_OFFSETS_MAX 5
enum {
SCARLETT_OUTPUTS,
SCARLETT_SWITCH_IMPEDANCE,
SCARLETT_SWITCH_PAD,
SCARLETT_SWITCH_GAIN,
};
enum {
SCARLETT_OFFSET_PCM = 0,
SCARLETT_OFFSET_ANALOG = 1,
SCARLETT_OFFSET_SPDIF = 2,
SCARLETT_OFFSET_ADAT = 3,
SCARLETT_OFFSET_MIX = 4,
};
struct scarlett_mixer_elem_enum_info {
int start;
int len;
int offsets[SND_SCARLETT_OFFSETS_MAX];
char const * const *names;
};
struct scarlett_mixer_control {
unsigned char num;
unsigned char type;
const char *name;
};
struct scarlett_device_info {
int matrix_in;
int matrix_out;
int input_len;
int output_len;
struct scarlett_mixer_elem_enum_info opt_master;
struct scarlett_mixer_elem_enum_info opt_matrix;
/* initial values for matrix mux */
int matrix_mux_init[SND_SCARLETT_MATRIX_IN_MAX];
int num_controls; /* number of items in controls */
const struct scarlett_mixer_control controls[SND_SCARLETT_CONTROLS_MAX];
};
/********************** Enum Strings *************************/
static const struct scarlett_mixer_elem_enum_info opt_pad = {
.start = 0,
.len = 2,
.offsets = {},
.names = (char const * const []){
"0dB", "-10dB"
}
};
static const struct scarlett_mixer_elem_enum_info opt_gain = {
.start = 0,
.len = 2,
.offsets = {},
.names = (char const * const []){
"Lo", "Hi"
}
};
static const struct scarlett_mixer_elem_enum_info opt_impedance = {
.start = 0,
.len = 2,
.offsets = {},
.names = (char const * const []){
"Line", "Hi-Z"
}
};
static const struct scarlett_mixer_elem_enum_info opt_clock = {
.start = 1,
.len = 3,
.offsets = {},
.names = (char const * const []){
"Internal", "SPDIF", "ADAT"
}
};
static const struct scarlett_mixer_elem_enum_info opt_sync = {
.start = 0,
.len = 2,
.offsets = {},
.names = (char const * const []){
"No Lock", "Locked"
}
};
static int scarlett_ctl_switch_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
uinfo->count = elem->channels;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 1;
return 0;
}
static int scarlett_ctl_switch_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
int i, err, val;
for (i = 0; i < elem->channels; i++) {
err = snd_usb_get_cur_mix_value(elem, i, i, &val);
if (err < 0)
return err;
val = !val; /* invert mute logic for mixer */
ucontrol->value.integer.value[i] = val;
}
return 0;
}
static int scarlett_ctl_switch_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
int i, changed = 0;
int err, oval, val;
for (i = 0; i < elem->channels; i++) {
err = snd_usb_get_cur_mix_value(elem, i, i, &oval);
if (err < 0)
return err;
val = ucontrol->value.integer.value[i];
val = !val;
if (oval != val) {
err = snd_usb_set_cur_mix_value(elem, i, i, val);
if (err < 0)
return err;
changed = 1;
}
}
return changed;
}
static int scarlett_ctl_resume(struct usb_mixer_elem_list *list)
{
struct usb_mixer_elem_info *elem = mixer_elem_list_to_info(list);
int i;
for (i = 0; i < elem->channels; i++)
if (elem->cached & (1 << i))
snd_usb_set_cur_mix_value(elem, i, i,
elem->cache_val[i]);
return 0;
}
static int scarlett_ctl_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = elem->channels;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = (int)kctl->private_value +
SND_SCARLETT_LEVEL_BIAS;
uinfo->value.integer.step = 1;
return 0;
}
static int scarlett_ctl_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
int i, err, val;
for (i = 0; i < elem->channels; i++) {
err = snd_usb_get_cur_mix_value(elem, i, i, &val);
if (err < 0)
return err;
val = clamp(val / 256, -128, (int)kctl->private_value) +
SND_SCARLETT_LEVEL_BIAS;
ucontrol->value.integer.value[i] = val;
}
return 0;
}
static int scarlett_ctl_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
int i, changed = 0;
int err, oval, val;
for (i = 0; i < elem->channels; i++) {
err = snd_usb_get_cur_mix_value(elem, i, i, &oval);
if (err < 0)
return err;
val = ucontrol->value.integer.value[i] -
SND_SCARLETT_LEVEL_BIAS;
val = val * 256;
if (oval != val) {
err = snd_usb_set_cur_mix_value(elem, i, i, val);
if (err < 0)
return err;
changed = 1;
}
}
return changed;
}
static void scarlett_generate_name(int i, char *dst, int offsets[])
{
if (i > offsets[SCARLETT_OFFSET_MIX])
sprintf(dst, "Mix %c",
'A'+(i - offsets[SCARLETT_OFFSET_MIX] - 1));
else if (i > offsets[SCARLETT_OFFSET_ADAT])
sprintf(dst, "ADAT %d", i - offsets[SCARLETT_OFFSET_ADAT]);
else if (i > offsets[SCARLETT_OFFSET_SPDIF])
sprintf(dst, "SPDIF %d", i - offsets[SCARLETT_OFFSET_SPDIF]);
else if (i > offsets[SCARLETT_OFFSET_ANALOG])
sprintf(dst, "Analog %d", i - offsets[SCARLETT_OFFSET_ANALOG]);
else if (i > offsets[SCARLETT_OFFSET_PCM])
sprintf(dst, "PCM %d", i - offsets[SCARLETT_OFFSET_PCM]);
else
sprintf(dst, "Off");
}
static int scarlett_ctl_enum_dynamic_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
struct scarlett_mixer_elem_enum_info *opt = elem->private_data;
unsigned int items = opt->len;
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = elem->channels;
uinfo->value.enumerated.items = items;
if (uinfo->value.enumerated.item >= items)
uinfo->value.enumerated.item = items - 1;
/* generate name dynamically based on item number and offset info */
scarlett_generate_name(uinfo->value.enumerated.item,
uinfo->value.enumerated.name,
opt->offsets);
return 0;
}
static int scarlett_ctl_enum_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
struct scarlett_mixer_elem_enum_info *opt = elem->private_data;
return snd_ctl_enum_info(uinfo, elem->channels, opt->len,
(const char * const *)opt->names);
}
static int scarlett_ctl_enum_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
struct scarlett_mixer_elem_enum_info *opt = elem->private_data;
int err, val;
err = snd_usb_get_cur_mix_value(elem, 0, 0, &val);
if (err < 0)
return err;
val = clamp(val - opt->start, 0, opt->len-1);
ucontrol->value.enumerated.item[0] = val;
return 0;
}
static int scarlett_ctl_enum_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
struct scarlett_mixer_elem_enum_info *opt = elem->private_data;
int err, oval, val;
err = snd_usb_get_cur_mix_value(elem, 0, 0, &oval);
if (err < 0)
return err;
val = ucontrol->value.integer.value[0];
val = val + opt->start;
if (val != oval) {
snd_usb_set_cur_mix_value(elem, 0, 0, val);
return 1;
}
return 0;
}
static int scarlett_ctl_enum_resume(struct usb_mixer_elem_list *list)
{
struct usb_mixer_elem_info *elem = mixer_elem_list_to_info(list);
if (elem->cached)
snd_usb_set_cur_mix_value(elem, 0, 0, *elem->cache_val);
return 0;
}
static int scarlett_ctl_meter_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
struct snd_usb_audio *chip = elem->head.mixer->chip;
unsigned char buf[2 * MAX_CHANNELS] = {0, };
int wValue = (elem->control << 8) | elem->idx_off;
int idx = snd_usb_ctrl_intf(chip) | (elem->head.id << 8);
int err;
err = snd_usb_ctl_msg(chip->dev,
usb_rcvctrlpipe(chip->dev, 0),
UAC2_CS_MEM,
USB_RECIP_INTERFACE | USB_TYPE_CLASS |
USB_DIR_IN, wValue, idx, buf, elem->channels);
if (err < 0)
return err;
ucontrol->value.enumerated.item[0] = clamp((int)buf[0], 0, 1);
return 0;
}
static const struct snd_kcontrol_new usb_scarlett_ctl_switch = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = scarlett_ctl_switch_info,
.get = scarlett_ctl_switch_get,
.put = scarlett_ctl_switch_put,
};
static const DECLARE_TLV_DB_SCALE(db_scale_scarlett_gain, -12800, 100, 0);
static const struct snd_kcontrol_new usb_scarlett_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ,
.name = "",
.info = scarlett_ctl_info,
.get = scarlett_ctl_get,
.put = scarlett_ctl_put,
.private_value = 6, /* max value */
.tlv = { .p = db_scale_scarlett_gain }
};
static const struct snd_kcontrol_new usb_scarlett_ctl_master = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ,
.name = "",
.info = scarlett_ctl_info,
.get = scarlett_ctl_get,
.put = scarlett_ctl_put,
.private_value = 6, /* max value */
.tlv = { .p = db_scale_scarlett_gain }
};
static const struct snd_kcontrol_new usb_scarlett_ctl_enum = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = scarlett_ctl_enum_info,
.get = scarlett_ctl_enum_get,
.put = scarlett_ctl_enum_put,
};
static const struct snd_kcontrol_new usb_scarlett_ctl_dynamic_enum = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = scarlett_ctl_enum_dynamic_info,
.get = scarlett_ctl_enum_get,
.put = scarlett_ctl_enum_put,
};
static const struct snd_kcontrol_new usb_scarlett_ctl_sync = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.name = "",
.info = scarlett_ctl_enum_info,
.get = scarlett_ctl_meter_get,
};
static int add_new_ctl(struct usb_mixer_interface *mixer,
const struct snd_kcontrol_new *ncontrol,
usb_mixer_elem_resume_func_t resume,
int index, int offset, int num,
int val_type, int channels, const char *name,
const struct scarlett_mixer_elem_enum_info *opt,
struct usb_mixer_elem_info **elem_ret
)
{
struct snd_kcontrol *kctl;
struct usb_mixer_elem_info *elem;
int err;
elem = kzalloc(sizeof(*elem), GFP_KERNEL);
if (!elem)
return -ENOMEM;
elem->head.mixer = mixer;
elem->head.resume = resume;
elem->control = offset;
elem->idx_off = num;
elem->head.id = index;
elem->val_type = val_type;
elem->channels = channels;
/* add scarlett_mixer_elem_enum_info struct */
elem->private_data = (void *)opt;
kctl = snd_ctl_new1(ncontrol, elem);
if (!kctl) {
kfree(elem);
return -ENOMEM;
}
kctl->private_free = snd_usb_mixer_elem_free;
strscpy(kctl->id.name, name, sizeof(kctl->id.name));
err = snd_usb_mixer_add_control(&elem->head, kctl);
if (err < 0)
return err;
if (elem_ret)
*elem_ret = elem;
return 0;
}
static int add_output_ctls(struct usb_mixer_interface *mixer,
int index, const char *name,
const struct scarlett_device_info *info)
{
int err;
char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
struct usb_mixer_elem_info *elem;
/* Add mute switch */
snprintf(mx, sizeof(mx), "Master %d (%s) Playback Switch",
index + 1, name);
err = add_new_ctl(mixer, &usb_scarlett_ctl_switch,
scarlett_ctl_resume, 0x0a, 0x01,
2*index+1, USB_MIXER_S16, 2, mx, NULL, &elem);
if (err < 0)
return err;
/* Add volume control and initialize to 0 */
snprintf(mx, sizeof(mx), "Master %d (%s) Playback Volume",
index + 1, name);
err = add_new_ctl(mixer, &usb_scarlett_ctl_master,
scarlett_ctl_resume, 0x0a, 0x02,
2*index+1, USB_MIXER_S16, 2, mx, NULL, &elem);
if (err < 0)
return err;
/* Add L channel source playback enumeration */
snprintf(mx, sizeof(mx), "Master %dL (%s) Source Playback Enum",
index + 1, name);
err = add_new_ctl(mixer, &usb_scarlett_ctl_dynamic_enum,
scarlett_ctl_enum_resume, 0x33, 0x00,
2*index, USB_MIXER_S16, 1, mx, &info->opt_master,
&elem);
if (err < 0)
return err;
/* Add R channel source playback enumeration */
snprintf(mx, sizeof(mx), "Master %dR (%s) Source Playback Enum",
index + 1, name);
err = add_new_ctl(mixer, &usb_scarlett_ctl_dynamic_enum,
scarlett_ctl_enum_resume, 0x33, 0x00,
2*index+1, USB_MIXER_S16, 1, mx, &info->opt_master,
&elem);
if (err < 0)
return err;
return 0;
}
/********************** device-specific config *************************/
/* untested... */
static const struct scarlett_device_info s6i6_info = {
.matrix_in = 18,
.matrix_out = 8,
.input_len = 6,
.output_len = 6,
.opt_master = {
.start = -1,
.len = 27,
.offsets = {0, 12, 16, 18, 18},
.names = NULL
},
.opt_matrix = {
.start = -1,
.len = 19,
.offsets = {0, 12, 16, 18, 18},
.names = NULL
},
.num_controls = 9,
.controls = {
{ .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" },
{ .num = 1, .type = SCARLETT_OUTPUTS, .name = "Headphone" },
{ .num = 2, .type = SCARLETT_OUTPUTS, .name = "SPDIF" },
{ .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 1, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 2, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 3, .type = SCARLETT_SWITCH_GAIN, .name = NULL},
{ .num = 4, .type = SCARLETT_SWITCH_GAIN, .name = NULL},
},
.matrix_mux_init = {
12, 13, 14, 15, /* Analog -> 1..4 */
16, 17, /* SPDIF -> 5,6 */
0, 1, 2, 3, 4, 5, 6, 7, /* PCM[1..12] -> 7..18 */
8, 9, 10, 11
}
};
/* untested... */
static const struct scarlett_device_info s8i6_info = {
.matrix_in = 18,
.matrix_out = 6,
.input_len = 8,
.output_len = 6,
.opt_master = {
.start = -1,
.len = 25,
.offsets = {0, 12, 16, 18, 18},
.names = NULL
},
.opt_matrix = {
.start = -1,
.len = 19,
.offsets = {0, 12, 16, 18, 18},
.names = NULL
},
.num_controls = 7,
.controls = {
{ .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" },
{ .num = 1, .type = SCARLETT_OUTPUTS, .name = "Headphone" },
{ .num = 2, .type = SCARLETT_OUTPUTS, .name = "SPDIF" },
{ .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 3, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 4, .type = SCARLETT_SWITCH_PAD, .name = NULL},
},
.matrix_mux_init = {
12, 13, 14, 15, /* Analog -> 1..4 */
16, 17, /* SPDIF -> 5,6 */
0, 1, 2, 3, 4, 5, 6, 7, /* PCM[1..12] -> 7..18 */
8, 9, 10, 11
}
};
static const struct scarlett_device_info s18i6_info = {
.matrix_in = 18,
.matrix_out = 6,
.input_len = 18,
.output_len = 6,
.opt_master = {
.start = -1,
.len = 31,
.offsets = {0, 6, 14, 16, 24},
.names = NULL,
},
.opt_matrix = {
.start = -1,
.len = 25,
.offsets = {0, 6, 14, 16, 24},
.names = NULL,
},
.num_controls = 5,
.controls = {
{ .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" },
{ .num = 1, .type = SCARLETT_OUTPUTS, .name = "Headphone" },
{ .num = 2, .type = SCARLETT_OUTPUTS, .name = "SPDIF" },
{ .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
},
.matrix_mux_init = {
6, 7, 8, 9, 10, 11, 12, 13, /* Analog -> 1..8 */
16, 17, 18, 19, 20, 21, /* ADAT[1..6] -> 9..14 */
14, 15, /* SPDIF -> 15,16 */
0, 1 /* PCM[1,2] -> 17,18 */
}
};
static const struct scarlett_device_info s18i8_info = {
.matrix_in = 18,
.matrix_out = 8,
.input_len = 18,
.output_len = 8,
.opt_master = {
.start = -1,
.len = 35,
.offsets = {0, 8, 16, 18, 26},
.names = NULL
},
.opt_matrix = {
.start = -1,
.len = 27,
.offsets = {0, 8, 16, 18, 26},
.names = NULL
},
.num_controls = 10,
.controls = {
{ .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" },
{ .num = 1, .type = SCARLETT_OUTPUTS, .name = "Headphone 1" },
{ .num = 2, .type = SCARLETT_OUTPUTS, .name = "Headphone 2" },
{ .num = 3, .type = SCARLETT_OUTPUTS, .name = "SPDIF" },
{ .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 1, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 2, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 3, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 4, .type = SCARLETT_SWITCH_PAD, .name = NULL},
},
.matrix_mux_init = {
8, 9, 10, 11, 12, 13, 14, 15, /* Analog -> 1..8 */
18, 19, 20, 21, 22, 23, /* ADAT[1..6] -> 9..14 */
16, 17, /* SPDIF -> 15,16 */
0, 1 /* PCM[1,2] -> 17,18 */
}
};
static const struct scarlett_device_info s18i20_info = {
.matrix_in = 18,
.matrix_out = 8,
.input_len = 18,
.output_len = 20,
.opt_master = {
.start = -1,
.len = 47,
.offsets = {0, 20, 28, 30, 38},
.names = NULL
},
.opt_matrix = {
.start = -1,
.len = 39,
.offsets = {0, 20, 28, 30, 38},
.names = NULL
},
.num_controls = 10,
.controls = {
{ .num = 0, .type = SCARLETT_OUTPUTS, .name = "Monitor" },
{ .num = 1, .type = SCARLETT_OUTPUTS, .name = "Line 3/4" },
{ .num = 2, .type = SCARLETT_OUTPUTS, .name = "Line 5/6" },
{ .num = 3, .type = SCARLETT_OUTPUTS, .name = "Line 7/8" },
{ .num = 4, .type = SCARLETT_OUTPUTS, .name = "Line 9/10" },
{ .num = 5, .type = SCARLETT_OUTPUTS, .name = "SPDIF" },
{ .num = 6, .type = SCARLETT_OUTPUTS, .name = "ADAT 1/2" },
{ .num = 7, .type = SCARLETT_OUTPUTS, .name = "ADAT 3/4" },
{ .num = 8, .type = SCARLETT_OUTPUTS, .name = "ADAT 5/6" },
{ .num = 9, .type = SCARLETT_OUTPUTS, .name = "ADAT 7/8" },
/*{ .num = 1, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 1, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 2, .type = SCARLETT_SWITCH_IMPEDANCE, .name = NULL},
{ .num = 2, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 3, .type = SCARLETT_SWITCH_PAD, .name = NULL},
{ .num = 4, .type = SCARLETT_SWITCH_PAD, .name = NULL},*/
},
.matrix_mux_init = {
20, 21, 22, 23, 24, 25, 26, 27, /* Analog -> 1..8 */
30, 31, 32, 33, 34, 35, /* ADAT[1..6] -> 9..14 */
28, 29, /* SPDIF -> 15,16 */
0, 1 /* PCM[1,2] -> 17,18 */
}
};
static int scarlett_controls_create_generic(struct usb_mixer_interface *mixer,
const struct scarlett_device_info *info)
{
int i, err;
char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
const struct scarlett_mixer_control *ctl;
struct usb_mixer_elem_info *elem;
/* create master switch and playback volume */
err = add_new_ctl(mixer, &usb_scarlett_ctl_switch,
scarlett_ctl_resume, 0x0a, 0x01, 0,
USB_MIXER_S16, 1, "Master Playback Switch", NULL,
&elem);
if (err < 0)
return err;
err = add_new_ctl(mixer, &usb_scarlett_ctl_master,
scarlett_ctl_resume, 0x0a, 0x02, 0,
USB_MIXER_S16, 1, "Master Playback Volume", NULL,
&elem);
if (err < 0)
return err;
/* iterate through controls in info struct and create each one */
for (i = 0; i < info->num_controls; i++) {
ctl = &info->controls[i];
switch (ctl->type) {
case SCARLETT_OUTPUTS:
err = add_output_ctls(mixer, ctl->num, ctl->name, info);
if (err < 0)
return err;
break;
case SCARLETT_SWITCH_IMPEDANCE:
sprintf(mx, "Input %d Impedance Switch", ctl->num);
err = add_new_ctl(mixer, &usb_scarlett_ctl_enum,
scarlett_ctl_enum_resume, 0x01,
0x09, ctl->num, USB_MIXER_S16, 1, mx,
&opt_impedance, &elem);
if (err < 0)
return err;
break;
case SCARLETT_SWITCH_PAD:
sprintf(mx, "Input %d Pad Switch", ctl->num);
err = add_new_ctl(mixer, &usb_scarlett_ctl_enum,
scarlett_ctl_enum_resume, 0x01,
0x0b, ctl->num, USB_MIXER_S16, 1, mx,
&opt_pad, &elem);
if (err < 0)
return err;
break;
case SCARLETT_SWITCH_GAIN:
sprintf(mx, "Input %d Gain Switch", ctl->num);
err = add_new_ctl(mixer, &usb_scarlett_ctl_enum,
scarlett_ctl_enum_resume, 0x01,
0x08, ctl->num, USB_MIXER_S16, 1, mx,
&opt_gain, &elem);
if (err < 0)
return err;
break;
}
}
return 0;
}
/*
* Create and initialize a mixer for the Focusrite(R) Scarlett
*/
int snd_scarlett_controls_create(struct usb_mixer_interface *mixer)
{
int err, i, o;
char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
const struct scarlett_device_info *info;
struct usb_mixer_elem_info *elem;
static char sample_rate_buffer[4] = { '\x80', '\xbb', '\x00', '\x00' };
/* only use UAC_VERSION_2 */
if (!mixer->protocol)
return 0;
switch (mixer->chip->usb_id) {
case USB_ID(0x1235, 0x8012):
info = &s6i6_info;
break;
case USB_ID(0x1235, 0x8002):
info = &s8i6_info;
break;
case USB_ID(0x1235, 0x8004):
info = &s18i6_info;
break;
case USB_ID(0x1235, 0x8014):
info = &s18i8_info;
break;
case USB_ID(0x1235, 0x800c):
info = &s18i20_info;
break;
default: /* device not (yet) supported */
return -EINVAL;
}
/* generic function to create controls */
err = scarlett_controls_create_generic(mixer, info);
if (err < 0)
return err;
/* setup matrix controls */
for (i = 0; i < info->matrix_in; i++) {
snprintf(mx, sizeof(mx), "Matrix %02d Input Playback Route",
i+1);
err = add_new_ctl(mixer, &usb_scarlett_ctl_dynamic_enum,
scarlett_ctl_enum_resume, 0x32,
0x06, i, USB_MIXER_S16, 1, mx,
&info->opt_matrix, &elem);
if (err < 0)
return err;
for (o = 0; o < info->matrix_out; o++) {
sprintf(mx, "Matrix %02d Mix %c Playback Volume", i+1,
o+'A');
err = add_new_ctl(mixer, &usb_scarlett_ctl,
scarlett_ctl_resume, 0x3c, 0x00,
(i << 3) + (o & 0x07), USB_MIXER_S16,
1, mx, NULL, &elem);
if (err < 0)
return err;
}
}
for (i = 0; i < info->input_len; i++) {
snprintf(mx, sizeof(mx), "Input Source %02d Capture Route",
i+1);
err = add_new_ctl(mixer, &usb_scarlett_ctl_dynamic_enum,
scarlett_ctl_enum_resume, 0x34,
0x00, i, USB_MIXER_S16, 1, mx,
&info->opt_master, &elem);
if (err < 0)
return err;
}
/* val_len == 1 needed here */
err = add_new_ctl(mixer, &usb_scarlett_ctl_enum,
scarlett_ctl_enum_resume, 0x28, 0x01, 0,
USB_MIXER_U8, 1, "Sample Clock Source",
&opt_clock, &elem);
if (err < 0)
return err;
/* val_len == 1 and UAC2_CS_MEM */
err = add_new_ctl(mixer, &usb_scarlett_ctl_sync, NULL, 0x3c, 0x00, 2,
USB_MIXER_U8, 1, "Sample Clock Sync Status",
&opt_sync, &elem);
if (err < 0)
return err;
/* initialize sampling rate to 48000 */
err = snd_usb_ctl_msg(mixer->chip->dev,
usb_sndctrlpipe(mixer->chip->dev, 0), UAC2_CS_CUR,
USB_RECIP_INTERFACE | USB_TYPE_CLASS |
USB_DIR_OUT, 0x0100, snd_usb_ctrl_intf(mixer->chip) |
(0x29 << 8), sample_rate_buffer, 4);
if (err < 0)
return err;
return err;
}