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linux/sound/usb/mixer_scarlett_gen2.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Focusrite Scarlett 6i6/18i8/18i20 Gen 2 Driver for ALSA
*
* Copyright (c) 2018-2019 by Geoffrey D. Bennett <g at b4.vu>
*
* Based on the Scarlett (Gen 1) 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>
*/
/* Mixer Interface for the Focusrite Scarlett 6i6/18i8/18i20 Gen 2 audio
* interface. Based on the Gen 1 driver and rewritten.
*/
/* The protocol was reverse engineered by looking at the communication
* between Focusrite Control 2.3.4 and the Focusrite(R) Scarlett 18i20
* (firmware 1083) using usbmon in July-August 2018.
*
* Scarlett 18i8 support added in April 2019.
*
* Scarlett 6i6 support added in June 2019 (thanks to Martin Wittmann
* for providing usbmon output and testing).
*
* Support for loading mixer volume and mux configuration from the
* interface during driver initialisation added in May 2021 (thanks to
* Vladimir Sadovnikov for figuring out how).
*
* This ALSA mixer gives access to:
* - input, output, mixer-matrix muxes
* - 18x10 mixer-matrix gain stages
* - gain/volume/mute controls
* - level meters
* - line/inst level and pad controls
*
* <ditaa>
* /--------------\ 18chn 20chn /--------------\
* | Hardware in +--+------\ /-------------+--+ ALSA PCM out |
* \--------------/ | | | | \--------------/
* | | | /-----\ |
* | | | | | |
* | v v v | |
* | +---------------+ | |
* | \ Matrix Mux / | |
* | +-----+-----+ | |
* | | | |
* | |18chn | |
* | | | |
* | | 10chn| |
* | v | |
* | +------------+ | |
* | | Mixer | | |
* | | Matrix | | |
* | | | | |
* | | 18x10 Gain | | |
* | | stages | | |
* | +-----+------+ | |
* | | | |
* |18chn |10chn | |20chn
* | | | |
* | +----------/ |
* | | |
* v v v
* ===========================
* +---------------+ +--—------------+
* \ Output Mux / \ Capture Mux /
* +---+---+---+ +-----+-----+
* | | |
* 10chn| | |18chn
* | | |
* /--------------\ | | | /--------------\
* | S/PDIF, ADAT |<--/ |10chn \-->| ALSA PCM in |
* | Hardware out | | \--------------/
* \--------------/ |
* v
* +-------------+ Software gain per channel.
* | Master Gain |<-- 18i20 only: Switch per channel
* +------+------+ to select HW or SW gain control.
* |
* |10chn
* /--------------\ |
* | Analogue |<------/
* | Hardware out |
* \--------------/
* </ditaa>
*
*/
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/moduleparam.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include "usbaudio.h"
#include "mixer.h"
#include "helper.h"
#include "mixer_scarlett_gen2.h"
/* device_setup value to enable */
#define SCARLETT2_ENABLE 0x01
/* some gui mixers can't handle negative ctl values */
#define SCARLETT2_VOLUME_BIAS 127
/* mixer range from -80dB to +6dB in 0.5dB steps */
#define SCARLETT2_MIXER_MIN_DB -80
#define SCARLETT2_MIXER_BIAS (-SCARLETT2_MIXER_MIN_DB * 2)
#define SCARLETT2_MIXER_MAX_DB 6
#define SCARLETT2_MIXER_MAX_VALUE \
((SCARLETT2_MIXER_MAX_DB - SCARLETT2_MIXER_MIN_DB) * 2)
#define SCARLETT2_MIXER_VALUE_COUNT (SCARLETT2_MIXER_MAX_VALUE + 1)
/* map from (dB + 80) * 2 to mixer value
* for dB in 0 .. 172: int(8192 * pow(10, ((dB - 160) / 2 / 20)))
*/
static const u16 scarlett2_mixer_values[SCARLETT2_MIXER_VALUE_COUNT] = {
0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 8, 8,
9, 9, 10, 10, 11, 12, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
23, 24, 25, 27, 29, 30, 32, 34, 36, 38, 41, 43, 46, 48, 51,
54, 57, 61, 65, 68, 73, 77, 81, 86, 91, 97, 103, 109, 115,
122, 129, 137, 145, 154, 163, 173, 183, 194, 205, 217, 230,
244, 259, 274, 290, 307, 326, 345, 365, 387, 410, 434, 460,
487, 516, 547, 579, 614, 650, 689, 730, 773, 819, 867, 919,
973, 1031, 1092, 1157, 1225, 1298, 1375, 1456, 1543, 1634,
1731, 1833, 1942, 2057, 2179, 2308, 2445, 2590, 2744, 2906,
3078, 3261, 3454, 3659, 3876, 4105, 4349, 4606, 4879, 5168,
5475, 5799, 6143, 6507, 6892, 7301, 7733, 8192, 8677, 9191,
9736, 10313, 10924, 11571, 12257, 12983, 13752, 14567, 15430,
16345
};
/* Maximum number of analogue outputs */
#define SCARLETT2_ANALOGUE_MAX 10
/* Maximum number of level and pad switches */
#define SCARLETT2_LEVEL_SWITCH_MAX 2
#define SCARLETT2_PAD_SWITCH_MAX 4
/* Maximum number of inputs to the mixer */
#define SCARLETT2_INPUT_MIX_MAX 18
/* Maximum number of outputs from the mixer */
#define SCARLETT2_OUTPUT_MIX_MAX 10
/* Maximum size of the data in the USB mux assignment message:
* 18 inputs, 20 outputs, 18 matrix inputs, 8 spare
*/
#define SCARLETT2_MUX_MAX 64
/* Maximum number of meters (sum of output port counts) */
#define SCARLETT2_MAX_METERS 56
/* Hardware port types:
* - None (no input to mux)
* - Analogue I/O
* - S/PDIF I/O
* - ADAT I/O
* - Mixer I/O
* - PCM I/O
*/
enum {
SCARLETT2_PORT_TYPE_NONE = 0,
SCARLETT2_PORT_TYPE_ANALOGUE = 1,
SCARLETT2_PORT_TYPE_SPDIF = 2,
SCARLETT2_PORT_TYPE_ADAT = 3,
SCARLETT2_PORT_TYPE_MIX = 4,
SCARLETT2_PORT_TYPE_PCM = 5,
SCARLETT2_PORT_TYPE_COUNT = 6,
};
/* I/O count of each port type kept in struct scarlett2_ports */
enum {
SCARLETT2_PORT_IN = 0,
SCARLETT2_PORT_OUT = 1,
SCARLETT2_PORT_DIRNS = 2,
};
/* Dim/Mute buttons on the 18i20 */
enum {
SCARLETT2_BUTTON_MUTE = 0,
SCARLETT2_BUTTON_DIM = 1,
SCARLETT2_DIM_MUTE_COUNT = 2,
};
static const char *const scarlett2_dim_mute_names[SCARLETT2_DIM_MUTE_COUNT] = {
"Mute", "Dim"
};
/* Description of each hardware port type:
* - id: hardware ID of this port type
* - src_descr: printf format string for mux input selections
* - src_num_offset: added to channel number for the fprintf
* - dst_descr: printf format string for mixer controls
*/
struct scarlett2_port {
u16 id;
const char * const src_descr;
int src_num_offset;
const char * const dst_descr;
};
static const struct scarlett2_port scarlett2_ports[SCARLETT2_PORT_TYPE_COUNT] = {
[SCARLETT2_PORT_TYPE_NONE] = {
.id = 0x000,
.src_descr = "Off"
},
[SCARLETT2_PORT_TYPE_ANALOGUE] = {
.id = 0x080,
.src_descr = "Analogue %d",
.src_num_offset = 1,
.dst_descr = "Analogue Output %02d Playback"
},
[SCARLETT2_PORT_TYPE_SPDIF] = {
.id = 0x180,
.src_descr = "S/PDIF %d",
.src_num_offset = 1,
.dst_descr = "S/PDIF Output %d Playback"
},
[SCARLETT2_PORT_TYPE_ADAT] = {
.id = 0x200,
.src_descr = "ADAT %d",
.src_num_offset = 1,
.dst_descr = "ADAT Output %d Playback"
},
[SCARLETT2_PORT_TYPE_MIX] = {
.id = 0x300,
.src_descr = "Mix %c",
.src_num_offset = 'A',
.dst_descr = "Mixer Input %02d Capture"
},
[SCARLETT2_PORT_TYPE_PCM] = {
.id = 0x600,
.src_descr = "PCM %d",
.src_num_offset = 1,
.dst_descr = "PCM %02d Capture"
},
};
/* Number of mux tables: one for each band of sample rates
* (44.1/48kHz, 88.2/96kHz, and 176.4/176kHz)
*/
#define SCARLETT2_MUX_TABLES 3
/* Maximum number of entries in a mux table */
#define SCARLETT2_MAX_MUX_ENTRIES 7
/* One entry within mux_assignment defines the port type and range of
* ports to add to the set_mux message. The end of the list is marked
* with count == 0.
*/
struct scarlett2_mux_entry {
u8 port_type;
u8 start;
u8 count;
};
struct scarlett2_device_info {
u32 usb_id; /* USB device identifier */
/* line out hw volume is sw controlled */
u8 line_out_hw_vol;
/* the number of analogue inputs with a software switchable
* level control that can be set to line or instrument
*/
u8 level_input_count;
/* the number of analogue inputs with a software switchable
* 10dB pad control
*/
u8 pad_input_count;
/* additional description for the line out volume controls */
const char * const line_out_descrs[SCARLETT2_ANALOGUE_MAX];
/* number of sources/destinations of each port type */
const int port_count[SCARLETT2_PORT_TYPE_COUNT][SCARLETT2_PORT_DIRNS];
/* layout/order of the entries in the set_mux message */
struct scarlett2_mux_entry mux_assignment[SCARLETT2_MUX_TABLES]
[SCARLETT2_MAX_MUX_ENTRIES];
};
struct scarlett2_data {
struct usb_mixer_interface *mixer;
struct mutex usb_mutex; /* prevent sending concurrent USB requests */
struct mutex data_mutex; /* lock access to this data */
struct delayed_work work;
const struct scarlett2_device_info *info;
__u8 bInterfaceNumber;
__u8 bEndpointAddress;
__u16 wMaxPacketSize;
__u8 bInterval;
int num_mux_srcs;
int num_mux_dsts;
u16 scarlett2_seq;
u8 sync_updated;
u8 vol_updated;
u8 sync;
u8 master_vol;
u8 vol[SCARLETT2_ANALOGUE_MAX];
u8 vol_sw_hw_switch[SCARLETT2_ANALOGUE_MAX];
u8 mute_switch[SCARLETT2_ANALOGUE_MAX];
u8 level_switch[SCARLETT2_LEVEL_SWITCH_MAX];
u8 pad_switch[SCARLETT2_PAD_SWITCH_MAX];
u8 dim_mute[SCARLETT2_DIM_MUTE_COUNT];
struct snd_kcontrol *sync_ctl;
struct snd_kcontrol *master_vol_ctl;
struct snd_kcontrol *vol_ctls[SCARLETT2_ANALOGUE_MAX];
struct snd_kcontrol *mute_ctls[SCARLETT2_ANALOGUE_MAX];
struct snd_kcontrol *dim_mute_ctls[SCARLETT2_DIM_MUTE_COUNT];
u8 mux[SCARLETT2_MUX_MAX];
u8 mix[SCARLETT2_INPUT_MIX_MAX * SCARLETT2_OUTPUT_MIX_MAX];
};
/*** Model-specific data ***/
static const struct scarlett2_device_info s6i6_gen2_info = {
.usb_id = USB_ID(0x1235, 0x8203),
.level_input_count = 2,
.pad_input_count = 2,
.line_out_descrs = {
"Headphones 1 L",
"Headphones 1 R",
"Headphones 2 L",
"Headphones 2 R",
},
.port_count = {
[SCARLETT2_PORT_TYPE_NONE] = { 1, 0 },
[SCARLETT2_PORT_TYPE_ANALOGUE] = { 4, 4 },
[SCARLETT2_PORT_TYPE_SPDIF] = { 2, 2 },
[SCARLETT2_PORT_TYPE_MIX] = { 10, 18 },
[SCARLETT2_PORT_TYPE_PCM] = { 6, 6 },
},
.mux_assignment = { {
{ SCARLETT2_PORT_TYPE_PCM, 0, 6 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 4 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 8 },
{ 0, 0, 0 },
}, {
{ SCARLETT2_PORT_TYPE_PCM, 0, 6 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 4 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 8 },
{ 0, 0, 0 },
}, {
{ SCARLETT2_PORT_TYPE_PCM, 0, 6 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 4 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 8 },
{ 0, 0, 0 },
} },
};
static const struct scarlett2_device_info s18i8_gen2_info = {
.usb_id = USB_ID(0x1235, 0x8204),
.level_input_count = 2,
.pad_input_count = 4,
.line_out_descrs = {
"Monitor L",
"Monitor R",
"Headphones 1 L",
"Headphones 1 R",
"Headphones 2 L",
"Headphones 2 R",
},
.port_count = {
[SCARLETT2_PORT_TYPE_NONE] = { 1, 0 },
[SCARLETT2_PORT_TYPE_ANALOGUE] = { 8, 6 },
[SCARLETT2_PORT_TYPE_SPDIF] = { 2, 2 },
[SCARLETT2_PORT_TYPE_ADAT] = { 8, 0 },
[SCARLETT2_PORT_TYPE_MIX] = { 10, 18 },
[SCARLETT2_PORT_TYPE_PCM] = { 8, 18 },
},
.mux_assignment = { {
{ SCARLETT2_PORT_TYPE_PCM, 0, 18 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 6 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 8 },
{ 0, 0, 0 },
}, {
{ SCARLETT2_PORT_TYPE_PCM, 0, 14 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 6 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 8 },
{ 0, 0, 0 },
}, {
{ SCARLETT2_PORT_TYPE_PCM, 0, 10 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 6 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 4 },
{ 0, 0, 0 },
} },
};
static const struct scarlett2_device_info s18i20_gen2_info = {
.usb_id = USB_ID(0x1235, 0x8201),
.line_out_hw_vol = 1,
.line_out_descrs = {
"Monitor L",
"Monitor R",
NULL,
NULL,
NULL,
NULL,
"Headphones 1 L",
"Headphones 1 R",
"Headphones 2 L",
"Headphones 2 R",
},
.port_count = {
[SCARLETT2_PORT_TYPE_NONE] = { 1, 0 },
[SCARLETT2_PORT_TYPE_ANALOGUE] = { 8, 10 },
[SCARLETT2_PORT_TYPE_SPDIF] = { 2, 2 },
[SCARLETT2_PORT_TYPE_ADAT] = { 8, 8 },
[SCARLETT2_PORT_TYPE_MIX] = { 10, 18 },
[SCARLETT2_PORT_TYPE_PCM] = { 20, 18 },
},
.mux_assignment = { {
{ SCARLETT2_PORT_TYPE_PCM, 0, 18 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 10 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_ADAT, 0, 8 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 8 },
{ 0, 0, 0 },
}, {
{ SCARLETT2_PORT_TYPE_PCM, 0, 14 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 10 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_ADAT, 0, 4 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 8 },
{ 0, 0, 0 },
}, {
{ SCARLETT2_PORT_TYPE_PCM, 0, 10 },
{ SCARLETT2_PORT_TYPE_ANALOGUE, 0, 10 },
{ SCARLETT2_PORT_TYPE_SPDIF, 0, 2 },
{ SCARLETT2_PORT_TYPE_MIX, 0, 18 },
{ SCARLETT2_PORT_TYPE_NONE, 0, 6 },
{ 0, 0, 0 },
} },
};
static const struct scarlett2_device_info *scarlett2_devices[] = {
/* Supported Gen 2 devices */
&s6i6_gen2_info,
&s18i8_gen2_info,
&s18i20_gen2_info,
/* End of list */
NULL
};
/* get the starting port index number for a given port type/direction */
static int scarlett2_get_port_start_num(
const int port_count[][SCARLETT2_PORT_DIRNS],
int direction, int port_type)
{
int i, num = 0;
for (i = 0; i < port_type; i++)
num += port_count[i][direction];
return num;
}
/*** USB Interactions ***/
/* Notifications from the interface */
#define SCARLETT2_USB_NOTIFY_SYNC 0x00000008
#define SCARLETT2_USB_NOTIFY_DIM_MUTE 0x00200000
#define SCARLETT2_USB_NOTIFY_MONITOR 0x00400000
/* Commands for sending/receiving requests/responses */
#define SCARLETT2_USB_CMD_INIT 0
#define SCARLETT2_USB_CMD_REQ 2
#define SCARLETT2_USB_CMD_RESP 3
#define SCARLETT2_USB_INIT_1 0x00000000
#define SCARLETT2_USB_INIT_2 0x00000002
#define SCARLETT2_USB_GET_METER 0x00001001
#define SCARLETT2_USB_GET_MIX 0x00002001
#define SCARLETT2_USB_SET_MIX 0x00002002
#define SCARLETT2_USB_GET_MUX 0x00003001
#define SCARLETT2_USB_SET_MUX 0x00003002
#define SCARLETT2_USB_GET_SYNC 0x00006004
#define SCARLETT2_USB_GET_DATA 0x00800000
#define SCARLETT2_USB_SET_DATA 0x00800001
#define SCARLETT2_USB_DATA_CMD 0x00800002
#define SCARLETT2_USB_CONFIG_SAVE 6
#define SCARLETT2_USB_VOLUME_STATUS_OFFSET 0x31
#define SCARLETT2_USB_METER_LEVELS_GET_MAGIC 1
/* volume status is read together (matches scarlett2_config_items[]) */
struct scarlett2_usb_volume_status {
/* dim/mute buttons */
u8 dim_mute[SCARLETT2_DIM_MUTE_COUNT];
u8 pad1;
/* software volume setting */
s16 sw_vol[SCARLETT2_ANALOGUE_MAX];
/* actual volume of output inc. dim (-18dB) */
s16 hw_vol[SCARLETT2_ANALOGUE_MAX];
/* internal mute buttons */
u8 mute_switch[SCARLETT2_ANALOGUE_MAX];
/* sw (0) or hw (1) controlled */
u8 sw_hw_switch[SCARLETT2_ANALOGUE_MAX];
u8 pad3[6];
/* front panel volume knob */
s16 master_vol;
} __packed;
/* Configuration parameters that can be read and written */
enum {
SCARLETT2_CONFIG_DIM_MUTE = 0,
SCARLETT2_CONFIG_LINE_OUT_VOLUME = 1,
SCARLETT2_CONFIG_MUTE_SWITCH = 2,
SCARLETT2_CONFIG_SW_HW_SWITCH = 3,
SCARLETT2_CONFIG_LEVEL_SWITCH = 4,
SCARLETT2_CONFIG_PAD_SWITCH = 5,
SCARLETT2_CONFIG_COUNT = 6
};
/* Location, size, and activation command number for the configuration
* parameters
*/
struct scarlett2_config {
u8 offset;
u8 size;
u8 activate;
};
static const struct scarlett2_config
scarlett2_config_items[SCARLETT2_CONFIG_COUNT] = {
[SCARLETT2_CONFIG_DIM_MUTE] = {
.offset = 0x31, .size = 1, .activate = 2 },
[SCARLETT2_CONFIG_LINE_OUT_VOLUME] = {
.offset = 0x34, .size = 2, .activate = 1 },
[SCARLETT2_CONFIG_MUTE_SWITCH] = {
.offset = 0x5c, .size = 1, .activate = 1 },
[SCARLETT2_CONFIG_SW_HW_SWITCH] = {
.offset = 0x66, .size = 1, .activate = 3 },
[SCARLETT2_CONFIG_LEVEL_SWITCH] = {
.offset = 0x7c, .size = 1, .activate = 7 },
[SCARLETT2_CONFIG_PAD_SWITCH] = {
.offset = 0x84, .size = 1, .activate = 8 },
};
/* proprietary request/response format */
struct scarlett2_usb_packet {
__le32 cmd;
__le16 size;
__le16 seq;
__le32 error;
__le32 pad;
u8 data[];
};
static void scarlett2_fill_request_header(struct scarlett2_data *private,
struct scarlett2_usb_packet *req,
u32 cmd, u16 req_size)
{
/* sequence must go up by 1 for each request */
u16 seq = private->scarlett2_seq++;
req->cmd = cpu_to_le32(cmd);
req->size = cpu_to_le16(req_size);
req->seq = cpu_to_le16(seq);
req->error = 0;
req->pad = 0;
}
static int scarlett2_usb_tx(struct usb_device *dev, int interface,
void *buf, u16 size)
{
return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
SCARLETT2_USB_CMD_REQ,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
0, interface, buf, size);
}
static int scarlett2_usb_rx(struct usb_device *dev, int interface,
u32 usb_req, void *buf, u16 size)
{
return snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
usb_req,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
0, interface, buf, size);
}
/* Send a proprietary format request to the Scarlett interface */
static int scarlett2_usb(
struct usb_mixer_interface *mixer, u32 cmd,
void *req_data, u16 req_size, void *resp_data, u16 resp_size)
{
struct scarlett2_data *private = mixer->private_data;
struct usb_device *dev = mixer->chip->dev;
u16 req_buf_size = sizeof(struct scarlett2_usb_packet) + req_size;
u16 resp_buf_size = sizeof(struct scarlett2_usb_packet) + resp_size;
struct scarlett2_usb_packet *req, *resp = NULL;
int err;
req = kmalloc(req_buf_size, GFP_KERNEL);
if (!req) {
err = -ENOMEM;
goto error;
}
resp = kmalloc(resp_buf_size, GFP_KERNEL);
if (!resp) {
err = -ENOMEM;
goto error;
}
mutex_lock(&private->usb_mutex);
/* build request message and send it */
scarlett2_fill_request_header(private, req, cmd, req_size);
if (req_size)
memcpy(req->data, req_data, req_size);
err = scarlett2_usb_tx(dev, private->bInterfaceNumber,
req, req_buf_size);
if (err != req_buf_size) {
usb_audio_err(
mixer->chip,
"Scarlett Gen 2 USB request result cmd %x was %d\n",
cmd, err);
err = -EINVAL;
goto unlock;
}
/* send a second message to get the response */
err = scarlett2_usb_rx(dev, private->bInterfaceNumber,
SCARLETT2_USB_CMD_RESP,
resp, resp_buf_size);
/* validate the response */
if (err != resp_buf_size) {
usb_audio_err(
mixer->chip,
"Scarlett Gen 2 USB response result cmd %x was %d "
"expected %d\n",
cmd, err, resp_buf_size);
err = -EINVAL;
goto unlock;
}
/* cmd/seq/size should match except when initialising
* seq sent = 1, response = 0
*/
if (resp->cmd != req->cmd ||
(resp->seq != req->seq &&
(le16_to_cpu(req->seq) != 1 || resp->seq != 0)) ||
resp_size != le16_to_cpu(resp->size) ||
resp->error ||
resp->pad) {
usb_audio_err(
mixer->chip,
"Scarlett Gen 2 USB invalid response; "
"cmd tx/rx %d/%d seq %d/%d size %d/%d "
"error %d pad %d\n",
le32_to_cpu(req->cmd), le32_to_cpu(resp->cmd),
le16_to_cpu(req->seq), le16_to_cpu(resp->seq),
resp_size, le16_to_cpu(resp->size),
le32_to_cpu(resp->error),
le32_to_cpu(resp->pad));
err = -EINVAL;
goto unlock;
}
if (resp_data && resp_size > 0)
memcpy(resp_data, resp->data, resp_size);
unlock:
mutex_unlock(&private->usb_mutex);
error:
kfree(req);
kfree(resp);
return err;
}
/* Send SCARLETT2_USB_DATA_CMD SCARLETT2_USB_CONFIG_SAVE */
static void scarlett2_config_save(struct usb_mixer_interface *mixer)
{
__le32 req = cpu_to_le32(SCARLETT2_USB_CONFIG_SAVE);
scarlett2_usb(mixer, SCARLETT2_USB_DATA_CMD,
&req, sizeof(u32),
NULL, 0);
}
/* Delayed work to save config */
static void scarlett2_config_save_work(struct work_struct *work)
{
struct scarlett2_data *private =
container_of(work, struct scarlett2_data, work.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)
*/
static int scarlett2_usb_set_config(
struct usb_mixer_interface *mixer,
int config_item_num, int index, int value)
{
const struct scarlett2_config *config_item =
&scarlett2_config_items[config_item_num];
struct {
__le32 offset;
__le32 bytes;
__le32 value;
} __packed req;
__le32 req2;
int err;
struct scarlett2_data *private = mixer->private_data;
/* Cancel any pending NVRAM save */
cancel_delayed_work_sync(&private->work);
/* Send the configuration parameter data */
req.offset = cpu_to_le32(config_item->offset + index * config_item->size);
req.bytes = cpu_to_le32(config_item->size);
req.value = cpu_to_le32(value);
err = scarlett2_usb(mixer, SCARLETT2_USB_SET_DATA,
&req, sizeof(u32) * 2 + config_item->size,
NULL, 0);
if (err < 0)
return err;
/* Activate the change */
req2 = cpu_to_le32(config_item->activate);
err = scarlett2_usb(mixer, SCARLETT2_USB_DATA_CMD,
&req2, sizeof(req2), NULL, 0);
if (err < 0)
return err;
/* Schedule the change to be written to NVRAM */
schedule_delayed_work(&private->work, msecs_to_jiffies(2000));
return 0;
}
/* Send a USB message to get data; result placed in *buf */
static int scarlett2_usb_get(
struct usb_mixer_interface *mixer,
int offset, void *buf, int size)
{
struct {
__le32 offset;
__le32 size;
} __packed req;
req.offset = cpu_to_le32(offset);
req.size = cpu_to_le32(size);
return scarlett2_usb(mixer, SCARLETT2_USB_GET_DATA,
&req, sizeof(req), buf, size);
}
/* Send a USB message to get configuration parameters; result placed in *buf */
static int scarlett2_usb_get_config(
struct usb_mixer_interface *mixer,
int config_item_num, int count, void *buf)
{
const struct scarlett2_config *config_item =
&scarlett2_config_items[config_item_num];
int size = config_item->size * count;
return scarlett2_usb_get(mixer, config_item->offset, buf, size);
}
/* Send a USB message to get sync status; result placed in *sync */
static int scarlett2_usb_get_sync_status(
struct usb_mixer_interface *mixer,
u8 *sync)
{
__le32 data;
int err;
err = scarlett2_usb(mixer, SCARLETT2_USB_GET_SYNC,
NULL, 0, &data, sizeof(data));
if (err < 0)
return err;
*sync = !!data;
return 0;
}
/* Send a USB message to get volume status; result placed in *buf */
static int scarlett2_usb_get_volume_status(
struct usb_mixer_interface *mixer,
struct scarlett2_usb_volume_status *buf)
{
return scarlett2_usb_get(mixer, SCARLETT2_USB_VOLUME_STATUS_OFFSET,
buf, sizeof(*buf));
}
/* Send a USB message to get the volumes for all inputs of one mix
* and put the values into private->mix[]
*/
static int scarlett2_usb_get_mix(struct usb_mixer_interface *mixer,
int mix_num)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
int num_mixer_in =
info->port_count[SCARLETT2_PORT_TYPE_MIX][SCARLETT2_PORT_OUT];
int err, i, j, k;
struct {
__le16 mix_num;
__le16 count;
} __packed req;
__le16 data[SCARLETT2_INPUT_MIX_MAX];
req.mix_num = cpu_to_le16(mix_num);
req.count = cpu_to_le16(num_mixer_in);
err = scarlett2_usb(mixer, SCARLETT2_USB_GET_MIX,
&req, sizeof(req),
data, num_mixer_in * sizeof(u16));
if (err < 0)
return err;
for (i = 0, j = mix_num * num_mixer_in; i < num_mixer_in; i++, j++) {
u16 mixer_value = le16_to_cpu(data[i]);
for (k = 0; k < SCARLETT2_MIXER_VALUE_COUNT; k++)
if (scarlett2_mixer_values[k] >= mixer_value)
break;
if (k == SCARLETT2_MIXER_VALUE_COUNT)
k = SCARLETT2_MIXER_MAX_VALUE;
private->mix[j] = k;
}
return 0;
}
/* Send a USB message to set the volumes for all inputs of one mix
* (values obtained from private->mix[])
*/
static int scarlett2_usb_set_mix(struct usb_mixer_interface *mixer,
int mix_num)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
struct {
__le16 mix_num;
__le16 data[SCARLETT2_INPUT_MIX_MAX];
} __packed req;
int i, j;
int num_mixer_in =
info->port_count[SCARLETT2_PORT_TYPE_MIX][SCARLETT2_PORT_OUT];
req.mix_num = cpu_to_le16(mix_num);
for (i = 0, j = mix_num * num_mixer_in; i < num_mixer_in; i++, j++)
req.data[i] = cpu_to_le16(
scarlett2_mixer_values[private->mix[j]]
);
return scarlett2_usb(mixer, SCARLETT2_USB_SET_MIX,
&req, (num_mixer_in + 1) * sizeof(u16),
NULL, 0);
}
/* Convert a port number index (per info->port_count) to a hardware ID */
static u32 scarlett2_mux_src_num_to_id(
const int port_count[][SCARLETT2_PORT_DIRNS], int num)
{
int port_type;
for (port_type = 0;
port_type < SCARLETT2_PORT_TYPE_COUNT;
port_type++) {
if (num < port_count[port_type][SCARLETT2_PORT_IN])
return scarlett2_ports[port_type].id | num;
num -= port_count[port_type][SCARLETT2_PORT_IN];
}
/* Oops */
return 0;
}
/* Convert a hardware ID to a port number index */
static u32 scarlett2_mux_id_to_num(
const int port_count[][SCARLETT2_PORT_DIRNS], int direction, u32 id)
{
int port_type;
int port_num = 0;
for (port_type = 0;
port_type < SCARLETT2_PORT_TYPE_COUNT;
port_type++) {
int base = scarlett2_ports[port_type].id;
int count = port_count[port_type][direction];
if (id >= base && id < base + count)
return port_num + id - base;
port_num += count;
}
/* Oops */
return -1;
}
/* Convert one mux entry from the interface and load into private->mux[] */
static void scarlett2_usb_populate_mux(struct scarlett2_data *private,
u32 mux_entry)
{
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int dst_idx, src_idx;
dst_idx = scarlett2_mux_id_to_num(port_count, SCARLETT2_PORT_OUT,
mux_entry & 0xFFF);
if (dst_idx < 0)
return;
if (dst_idx >= private->num_mux_dsts) {
usb_audio_err(private->mixer->chip,
"BUG: scarlett2_mux_id_to_num(%06x, OUT): %d >= %d",
mux_entry, dst_idx, private->num_mux_dsts);
return;
}
src_idx = scarlett2_mux_id_to_num(port_count, SCARLETT2_PORT_IN,
mux_entry >> 12);
if (src_idx < 0)
return;
if (src_idx >= private->num_mux_srcs) {
usb_audio_err(private->mixer->chip,
"BUG: scarlett2_mux_id_to_num(%06x, IN): %d >= %d",
mux_entry, src_idx, private->num_mux_srcs);
return;
}
private->mux[dst_idx] = src_idx;
}
/* Send USB message to get mux inputs and then populate private->mux[] */
static int scarlett2_usb_get_mux(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
int count = private->num_mux_dsts;
int err, i;
struct {
__le16 num;
__le16 count;
} __packed req;
__le32 data[SCARLETT2_MUX_MAX];
req.num = 0;
req.count = cpu_to_le16(count);
err = scarlett2_usb(mixer, SCARLETT2_USB_GET_MUX,
&req, sizeof(req),
data, count * sizeof(u32));
if (err < 0)
return err;
for (i = 0; i < count; i++)
scarlett2_usb_populate_mux(private, le32_to_cpu(data[i]));
return 0;
}
/* Send USB messages to set mux inputs */
static int scarlett2_usb_set_mux(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int table;
struct {
__le16 pad;
__le16 num;
__le32 data[SCARLETT2_MUX_MAX];
} __packed req;
req.pad = 0;
/* set mux settings for each rate */
for (table = 0; table < SCARLETT2_MUX_TABLES; table++) {
const struct scarlett2_mux_entry *entry;
/* i counts over the output array */
int i = 0, err;
req.num = cpu_to_le16(table);
/* loop through each entry */
for (entry = info->mux_assignment[table];
entry->count;
entry++) {
int j;
int port_type = entry->port_type;
int port_idx = entry->start;
int mux_idx = scarlett2_get_port_start_num(port_count,
SCARLETT2_PORT_OUT, port_type) + port_idx;
int dst_id = scarlett2_ports[port_type].id + port_idx;
/* Empty slots */
if (!dst_id) {
for (j = 0; j < entry->count; j++)
req.data[i++] = 0;
continue;
}
/* Non-empty mux slots use the lower 12 bits
* for the destination and next 12 bits for
* the source
*/
for (j = 0; j < entry->count; j++) {
int src_id = scarlett2_mux_src_num_to_id(
port_count, private->mux[mux_idx++]);
req.data[i++] = cpu_to_le32(dst_id |
src_id << 12);
dst_id++;
}
}
err = scarlett2_usb(mixer, SCARLETT2_USB_SET_MUX,
&req, (i + 1) * sizeof(u32),
NULL, 0);
if (err < 0)
return err;
}
return 0;
}
/* Send USB message to get meter levels */
static int scarlett2_usb_get_meter_levels(struct usb_mixer_interface *mixer,
u16 num_meters, u16 *levels)
{
struct {
__le16 pad;
__le16 num_meters;
__le32 magic;
} __packed req;
u32 resp[SCARLETT2_MAX_METERS];
int i, err;
req.pad = 0;
req.num_meters = cpu_to_le16(num_meters);
req.magic = cpu_to_le32(SCARLETT2_USB_METER_LEVELS_GET_MAGIC);
err = scarlett2_usb(mixer, SCARLETT2_USB_GET_METER,
&req, sizeof(req), resp, num_meters * sizeof(u32));
if (err < 0)
return err;
/* copy, convert to u16 */
for (i = 0; i < num_meters; i++)
levels[i] = resp[i];
return 0;
}
/*** Control Functions ***/
/* helper function to create a new control */
static int scarlett2_add_new_ctl(struct usb_mixer_interface *mixer,
const struct snd_kcontrol_new *ncontrol,
int index, int channels, const char *name,
struct snd_kcontrol **kctl_return)
{
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->control = index;
elem->head.id = index;
elem->channels = channels;
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 (kctl_return)
*kctl_return = kctl;
return 0;
}
/*** Sync Control ***/
/* Update sync control after receiving notification that the status
* has changed
*/
static int scarlett2_update_sync(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
private->sync_updated = 0;
return scarlett2_usb_get_sync_status(mixer, &private->sync);
}
static int scarlett2_sync_ctl_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
static const char *texts[2] = {
"Unlocked", "Locked"
};
return snd_ctl_enum_info(uinfo, 1, 2, texts);
}
static int scarlett2_sync_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->sync_updated)
scarlett2_update_sync(mixer);
ucontrol->value.enumerated.item[0] = private->sync;
mutex_unlock(&private->data_mutex);
return 0;
}
static const struct snd_kcontrol_new scarlett2_sync_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.name = "",
.info = scarlett2_sync_ctl_info,
.get = scarlett2_sync_ctl_get
};
static int scarlett2_add_sync_ctl(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
return scarlett2_add_new_ctl(mixer, &scarlett2_sync_ctl,
0, 1, "Sync Status", &private->sync_ctl);
}
/*** Analogue Line Out Volume Controls ***/
/* Update hardware volume controls after receiving notification that
* they have changed
*/
static int scarlett2_update_volumes(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
struct scarlett2_usb_volume_status volume_status;
int num_line_out =
port_count[SCARLETT2_PORT_TYPE_ANALOGUE][SCARLETT2_PORT_OUT];
int err, i;
int mute;
private->vol_updated = 0;
err = scarlett2_usb_get_volume_status(mixer, &volume_status);
if (err < 0)
return err;
private->master_vol = clamp(
volume_status.master_vol + SCARLETT2_VOLUME_BIAS,
0, SCARLETT2_VOLUME_BIAS);
if (info->line_out_hw_vol)
for (i = 0; i < SCARLETT2_DIM_MUTE_COUNT; i++)
private->dim_mute[i] = !!volume_status.dim_mute[i];
mute = private->dim_mute[SCARLETT2_BUTTON_MUTE];
for (i = 0; i < num_line_out; i++)
if (private->vol_sw_hw_switch[i]) {
private->vol[i] = private->master_vol;
private->mute_switch[i] = mute;
}
return 0;
}
static int scarlett2_volume_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 = SCARLETT2_VOLUME_BIAS;
uinfo->value.integer.step = 1;
return 0;
}
static int scarlett2_master_volume_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->vol_updated)
scarlett2_update_volumes(mixer);
mutex_unlock(&private->data_mutex);
ucontrol->value.integer.value[0] = private->master_vol;
return 0;
}
static int scarlett2_volume_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;
int index = elem->control;
mutex_lock(&private->data_mutex);
if (private->vol_updated)
scarlett2_update_volumes(mixer);
mutex_unlock(&private->data_mutex);
ucontrol->value.integer.value[0] = private->vol[index];
return 0;
}
static int scarlett2_volume_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->vol[index];
val = ucontrol->value.integer.value[0];
if (oval == val)
goto unlock;
private->vol[index] = val;
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_LINE_OUT_VOLUME,
index, val - SCARLETT2_VOLUME_BIAS);
if (err == 0)
err = 1;
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const DECLARE_TLV_DB_MINMAX(
db_scale_scarlett2_gain, -SCARLETT2_VOLUME_BIAS * 100, 0
);
static const struct snd_kcontrol_new scarlett2_master_volume_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.access = SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_TLV_READ,
.name = "",
.info = scarlett2_volume_ctl_info,
.get = scarlett2_master_volume_ctl_get,
.private_value = 0, /* max value */
.tlv = { .p = db_scale_scarlett2_gain }
};
static const struct snd_kcontrol_new scarlett2_line_out_volume_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ,
.name = "",
.info = scarlett2_volume_ctl_info,
.get = scarlett2_volume_ctl_get,
.put = scarlett2_volume_ctl_put,
.private_value = 0, /* max value */
.tlv = { .p = db_scale_scarlett2_gain }
};
/*** Mute Switch Controls ***/
static int scarlett2_mute_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;
int index = elem->control;
ucontrol->value.integer.value[0] = private->mute_switch[index];
return 0;
}
static int scarlett2_mute_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->mute_switch[index];
val = !!ucontrol->value.integer.value[0];
if (oval == val)
goto unlock;
private->mute_switch[index] = val;
/* Send mute change to the device */
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_MUTE_SWITCH,
index, val);
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const struct snd_kcontrol_new scarlett2_mute_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = snd_ctl_boolean_mono_info,
.get = scarlett2_mute_ctl_get,
.put = scarlett2_mute_ctl_put,
};
/*** HW/SW Volume Switch Controls ***/
static int scarlett2_sw_hw_enum_ctl_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
static const char *const values[2] = {
"SW", "HW"
};
return snd_ctl_enum_info(uinfo, 1, 2, values);
}
static int scarlett2_sw_hw_enum_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.enumerated.item[0] =
private->vol_sw_hw_switch[elem->control];
return 0;
}
static void scarlett2_vol_ctl_set_writable(struct usb_mixer_interface *mixer,
int index, int value)
{
struct scarlett2_data *private = mixer->private_data;
struct snd_card *card = mixer->chip->card;
/* Set/Clear write bits */
if (value) {
private->vol_ctls[index]->vd[0].access |=
SNDRV_CTL_ELEM_ACCESS_WRITE;
private->mute_ctls[index]->vd[0].access |=
SNDRV_CTL_ELEM_ACCESS_WRITE;
} else {
private->vol_ctls[index]->vd[0].access &=
~SNDRV_CTL_ELEM_ACCESS_WRITE;
private->mute_ctls[index]->vd[0].access &=
~SNDRV_CTL_ELEM_ACCESS_WRITE;
}
/* Notify of write bit change */
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_INFO,
&private->vol_ctls[index]->id);
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_INFO,
&private->mute_ctls[index]->id);
}
static int scarlett2_sw_hw_enum_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->vol_sw_hw_switch[index];
val = !!ucontrol->value.enumerated.item[0];
if (oval == val)
goto unlock;
private->vol_sw_hw_switch[index] = val;
/* Change access mode to RO (hardware controlled volume)
* or RW (software controlled volume)
*/
scarlett2_vol_ctl_set_writable(mixer, index, !val);
/* Reset volume/mute to master volume/mute */
private->vol[index] = private->master_vol;
private->mute_switch[index] = private->dim_mute[SCARLETT2_BUTTON_MUTE];
/* Set SW volume to current HW volume */
err = scarlett2_usb_set_config(
mixer, SCARLETT2_CONFIG_LINE_OUT_VOLUME,
index, private->master_vol - SCARLETT2_VOLUME_BIAS);
if (err < 0)
goto unlock;
/* Set SW mute to current HW mute */
err = scarlett2_usb_set_config(
mixer, SCARLETT2_CONFIG_MUTE_SWITCH,
index, private->dim_mute[SCARLETT2_BUTTON_MUTE]);
if (err < 0)
goto unlock;
/* Send SW/HW switch change to the device */
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_SW_HW_SWITCH,
index, val);
if (err == 0)
err = 1;
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const struct snd_kcontrol_new scarlett2_sw_hw_enum_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = scarlett2_sw_hw_enum_ctl_info,
.get = scarlett2_sw_hw_enum_ctl_get,
.put = scarlett2_sw_hw_enum_ctl_put,
};
/*** Line Level/Instrument Level Switch Controls ***/
static int scarlett2_level_enum_ctl_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
static const char *const values[2] = {
"Line", "Inst"
};
return snd_ctl_enum_info(uinfo, 1, 2, values);
}
static int scarlett2_level_enum_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.enumerated.item[0] =
private->level_switch[elem->control];
return 0;
}
static int scarlett2_level_enum_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->level_switch[index];
val = !!ucontrol->value.enumerated.item[0];
if (oval == val)
goto unlock;
private->level_switch[index] = val;
/* Send switch change to the device */
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_LEVEL_SWITCH,
index, val);
if (err == 0)
err = 1;
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const struct snd_kcontrol_new scarlett2_level_enum_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = scarlett2_level_enum_ctl_info,
.get = scarlett2_level_enum_ctl_get,
.put = scarlett2_level_enum_ctl_put,
};
/*** Pad Switch Controls ***/
static int scarlett2_pad_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->pad_switch[elem->control];
return 0;
}
static int scarlett2_pad_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->pad_switch[index];
val = !!ucontrol->value.integer.value[0];
if (oval == val)
goto unlock;
private->pad_switch[index] = val;
/* Send switch change to the device */
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_PAD_SWITCH,
index, val);
if (err == 0)
err = 1;
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const struct snd_kcontrol_new scarlett2_pad_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = snd_ctl_boolean_mono_info,
.get = scarlett2_pad_ctl_get,
.put = scarlett2_pad_ctl_put,
};
/*** Dim/Mute Controls ***/
static int scarlett2_dim_mute_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->vol_updated)
scarlett2_update_volumes(mixer);
mutex_unlock(&private->data_mutex);
ucontrol->value.integer.value[0] = private->dim_mute[elem->control];
return 0;
}
static int scarlett2_dim_mute_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;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int num_line_out =
port_count[SCARLETT2_PORT_TYPE_ANALOGUE][SCARLETT2_PORT_OUT];
int index = elem->control;
int oval, val, err = 0, i;
mutex_lock(&private->data_mutex);
oval = private->dim_mute[index];
val = !!ucontrol->value.integer.value[0];
if (oval == val)
goto unlock;
private->dim_mute[index] = val;
/* Send switch change to the device */
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_DIM_MUTE,
index, val);
if (err == 0)
err = 1;
if (index == SCARLETT2_BUTTON_MUTE)
for (i = 0; i < num_line_out; i++)
if (private->vol_sw_hw_switch[i]) {
private->mute_switch[i] = val;
snd_ctl_notify(mixer->chip->card,
SNDRV_CTL_EVENT_MASK_INFO,
&private->mute_ctls[i]->id);
}
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const struct snd_kcontrol_new scarlett2_dim_mute_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = snd_ctl_boolean_mono_info,
.get = scarlett2_dim_mute_ctl_get,
.put = scarlett2_dim_mute_ctl_put
};
/*** Create the analogue output controls ***/
static int scarlett2_add_line_out_ctls(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int num_line_out =
port_count[SCARLETT2_PORT_TYPE_ANALOGUE][SCARLETT2_PORT_OUT];
int err, i;
char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
/* Add R/O HW volume control */
if (info->line_out_hw_vol) {
snprintf(s, sizeof(s), "Master HW Playback Volume");
err = scarlett2_add_new_ctl(mixer,
&scarlett2_master_volume_ctl,
0, 1, s, &private->master_vol_ctl);
if (err < 0)
return err;
}
/* Add volume controls */
for (i = 0; i < num_line_out; i++) {
/* Fader */
if (info->line_out_descrs[i])
snprintf(s, sizeof(s),
"Line %02d (%s) Playback Volume",
i + 1, info->line_out_descrs[i]);
else
snprintf(s, sizeof(s),
"Line %02d Playback Volume",
i + 1);
err = scarlett2_add_new_ctl(mixer,
&scarlett2_line_out_volume_ctl,
i, 1, s, &private->vol_ctls[i]);
if (err < 0)
return err;
/* Mute Switch */
snprintf(s, sizeof(s),
"Line %02d Mute Playback Switch",
i + 1);
err = scarlett2_add_new_ctl(mixer,
&scarlett2_mute_ctl,
i, 1, s,
&private->mute_ctls[i]);
if (err < 0)
return err;
/* Make the fader and mute controls read-only if the
* SW/HW switch is set to HW
*/
if (private->vol_sw_hw_switch[i])
scarlett2_vol_ctl_set_writable(mixer, i, 0);
/* SW/HW Switch */
if (info->line_out_hw_vol) {
snprintf(s, sizeof(s),
"Line Out %02d Volume Control Playback Enum",
i + 1);
err = scarlett2_add_new_ctl(mixer,
&scarlett2_sw_hw_enum_ctl,
i, 1, s, NULL);
if (err < 0)
return err;
}
}
/* Add dim/mute controls */
if (info->line_out_hw_vol)
for (i = 0; i < SCARLETT2_DIM_MUTE_COUNT; i++) {
err = scarlett2_add_new_ctl(
mixer, &scarlett2_dim_mute_ctl,
i, 1, scarlett2_dim_mute_names[i],
&private->dim_mute_ctls[i]);
if (err < 0)
return err;
}
return 0;
}
/*** Create the analogue input controls ***/
static int scarlett2_add_line_in_ctls(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
int err, i;
char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
const char *fmt = "Line In %d %s Capture %s";
/* Add input level (line/inst) controls */
for (i = 0; i < info->level_input_count; i++) {
snprintf(s, sizeof(s), fmt, i + 1, "Level", "Enum");
err = scarlett2_add_new_ctl(mixer, &scarlett2_level_enum_ctl,
i, 1, s, NULL);
if (err < 0)
return err;
}
/* Add input pad controls */
for (i = 0; i < info->pad_input_count; i++) {
snprintf(s, sizeof(s), fmt, i + 1, "Pad", "Switch");
err = scarlett2_add_new_ctl(mixer, &scarlett2_pad_ctl,
i, 1, s, NULL);
if (err < 0)
return err;
}
return 0;
}
/*** Mixer Volume Controls ***/
static int scarlett2_mixer_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 = SCARLETT2_MIXER_MAX_VALUE;
uinfo->value.integer.step = 1;
return 0;
}
static int scarlett2_mixer_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->mix[elem->control];
return 0;
}
static int scarlett2_mixer_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;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int oval, val, num_mixer_in, mix_num, err = 0;
int index = elem->control;
mutex_lock(&private->data_mutex);
oval = private->mix[index];
val = ucontrol->value.integer.value[0];
num_mixer_in = port_count[SCARLETT2_PORT_TYPE_MIX][SCARLETT2_PORT_OUT];
mix_num = index / num_mixer_in;
if (oval == val)
goto unlock;
private->mix[index] = val;
err = scarlett2_usb_set_mix(mixer, mix_num);
if (err == 0)
err = 1;
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const DECLARE_TLV_DB_MINMAX(
db_scale_scarlett2_mixer,
SCARLETT2_MIXER_MIN_DB * 100,
SCARLETT2_MIXER_MAX_DB * 100
);
static const struct snd_kcontrol_new scarlett2_mixer_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ,
.name = "",
.info = scarlett2_mixer_ctl_info,
.get = scarlett2_mixer_ctl_get,
.put = scarlett2_mixer_ctl_put,
.private_value = SCARLETT2_MIXER_MAX_DB, /* max value */
.tlv = { .p = db_scale_scarlett2_mixer }
};
static int scarlett2_add_mixer_ctls(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int err, i, j;
int index;
char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
int num_inputs =
port_count[SCARLETT2_PORT_TYPE_MIX][SCARLETT2_PORT_OUT];
int num_outputs =
port_count[SCARLETT2_PORT_TYPE_MIX][SCARLETT2_PORT_IN];
for (i = 0, index = 0; i < num_outputs; i++)
for (j = 0; j < num_inputs; j++, index++) {
snprintf(s, sizeof(s),
"Mix %c Input %02d Playback Volume",
'A' + i, j + 1);
err = scarlett2_add_new_ctl(mixer, &scarlett2_mixer_ctl,
index, 1, s, NULL);
if (err < 0)
return err;
}
return 0;
}
/*** Mux Source Selection Controls ***/
static int scarlett2_mux_src_enum_ctl_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
struct scarlett2_data *private = elem->head.mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
unsigned int item = uinfo->value.enumerated.item;
int items = private->num_mux_srcs;
int port_type;
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = elem->channels;
uinfo->value.enumerated.items = items;
if (item >= items)
item = uinfo->value.enumerated.item = items - 1;
for (port_type = 0;
port_type < SCARLETT2_PORT_TYPE_COUNT;
port_type++) {
if (item < port_count[port_type][SCARLETT2_PORT_IN]) {
const struct scarlett2_port *port =
&scarlett2_ports[port_type];
sprintf(uinfo->value.enumerated.name,
port->src_descr, item + port->src_num_offset);
return 0;
}
item -= port_count[port_type][SCARLETT2_PORT_IN];
}
return -EINVAL;
}
static int scarlett2_mux_src_enum_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.enumerated.item[0] = private->mux[elem->control];
return 0;
}
static int scarlett2_mux_src_enum_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->mux[index];
val = min(ucontrol->value.enumerated.item[0],
private->num_mux_srcs - 1U);
if (oval == val)
goto unlock;
private->mux[index] = val;
err = scarlett2_usb_set_mux(mixer);
if (err == 0)
err = 1;
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const struct snd_kcontrol_new scarlett2_mux_src_enum_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = scarlett2_mux_src_enum_ctl_info,
.get = scarlett2_mux_src_enum_ctl_get,
.put = scarlett2_mux_src_enum_ctl_put,
};
static int scarlett2_add_mux_enums(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int port_type, channel, i;
for (i = 0, port_type = 0;
port_type < SCARLETT2_PORT_TYPE_COUNT;
port_type++) {
for (channel = 0;
channel < port_count[port_type][SCARLETT2_PORT_OUT];
channel++, i++) {
int err;
char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
const char *const descr =
scarlett2_ports[port_type].dst_descr;
snprintf(s, sizeof(s) - 5, descr, channel + 1);
strcat(s, " Enum");
err = scarlett2_add_new_ctl(mixer,
&scarlett2_mux_src_enum_ctl,
i, 1, s, NULL);
if (err < 0)
return err;
}
}
return 0;
}
/*** Meter Controls ***/
static int scarlett2_meter_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 = 4095;
uinfo->value.integer.step = 1;
return 0;
}
static int scarlett2_meter_ctl_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
u16 meter_levels[SCARLETT2_MAX_METERS];
int i, err;
err = scarlett2_usb_get_meter_levels(elem->head.mixer, elem->channels,
meter_levels);
if (err < 0)
return err;
for (i = 0; i < elem->channels; i++)
ucontrol->value.integer.value[i] = meter_levels[i];
return 0;
}
static const struct snd_kcontrol_new scarlett2_meter_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.name = "",
.info = scarlett2_meter_ctl_info,
.get = scarlett2_meter_ctl_get
};
static int scarlett2_add_meter_ctl(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
return scarlett2_add_new_ctl(mixer, &scarlett2_meter_ctl,
0, private->num_mux_dsts,
"Level Meter", NULL);
}
/*** Cleanup/Suspend Callbacks ***/
static void scarlett2_private_free(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
cancel_delayed_work_sync(&private->work);
kfree(private);
mixer->private_data = NULL;
}
static void scarlett2_private_suspend(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
if (cancel_delayed_work_sync(&private->work))
scarlett2_config_save(private->mixer);
}
/*** Initialisation ***/
static void scarlett2_count_mux_io(struct scarlett2_data *private)
{
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int port_type, srcs = 0, dsts = 0;
for (port_type = 0;
port_type < SCARLETT2_PORT_TYPE_COUNT;
port_type++) {
srcs += port_count[port_type][SCARLETT2_PORT_IN];
dsts += port_count[port_type][SCARLETT2_PORT_OUT];
}
private->num_mux_srcs = srcs;
private->num_mux_dsts = dsts;
}
/* Look through the interface descriptors for the Focusrite Control
* interface (bInterfaceClass = 255 Vendor Specific Class) and set
* bInterfaceNumber, bEndpointAddress, wMaxPacketSize, and bInterval
* in private
*/
static int scarlett2_find_fc_interface(struct usb_device *dev,
struct scarlett2_data *private)
{
struct usb_host_config *config = dev->actconfig;
int i;
for (i = 0; i < config->desc.bNumInterfaces; i++) {
struct usb_interface *intf = config->interface[i];
struct usb_interface_descriptor *desc =
&intf->altsetting[0].desc;
struct usb_endpoint_descriptor *epd;
if (desc->bInterfaceClass != 255)
continue;
epd = get_endpoint(intf->altsetting, 0);
private->bInterfaceNumber = desc->bInterfaceNumber;
private->bEndpointAddress = epd->bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
private->wMaxPacketSize = le16_to_cpu(epd->wMaxPacketSize);
private->bInterval = epd->bInterval;
return 0;
}
return -EINVAL;
}
/* Initialise private data */
static int scarlett2_init_private(struct usb_mixer_interface *mixer,
const struct scarlett2_device_info *info)
{
struct scarlett2_data *private =
kzalloc(sizeof(struct scarlett2_data), GFP_KERNEL);
if (!private)
return -ENOMEM;
mutex_init(&private->usb_mutex);
mutex_init(&private->data_mutex);
INIT_DELAYED_WORK(&private->work, scarlett2_config_save_work);
mixer->private_data = private;
mixer->private_free = scarlett2_private_free;
mixer->private_suspend = scarlett2_private_suspend;
private->info = info;
scarlett2_count_mux_io(private);
private->scarlett2_seq = 0;
private->mixer = mixer;
return scarlett2_find_fc_interface(mixer->chip->dev, private);
}
/* Cargo cult proprietary initialisation sequence */
static int scarlett2_usb_init(struct usb_mixer_interface *mixer)
{
struct usb_device *dev = mixer->chip->dev;
struct scarlett2_data *private = mixer->private_data;
u8 buf[24];
int err;
if (usb_pipe_type_check(dev, usb_sndctrlpipe(dev, 0)))
return -EINVAL;
/* step 0 */
err = scarlett2_usb_rx(dev, private->bInterfaceNumber,
SCARLETT2_USB_CMD_INIT, buf, sizeof(buf));
if (err < 0)
return err;
/* step 1 */
private->scarlett2_seq = 1;
err = scarlett2_usb(mixer, SCARLETT2_USB_INIT_1, NULL, 0, NULL, 0);
if (err < 0)
return err;
/* step 2 */
private->scarlett2_seq = 1;
return scarlett2_usb(mixer, SCARLETT2_USB_INIT_2, NULL, 0, NULL, 84);
}
/* Read configuration from the interface on start */
static int scarlett2_read_configs(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int num_line_out =
port_count[SCARLETT2_PORT_TYPE_ANALOGUE][SCARLETT2_PORT_OUT];
int num_mixer_out =
port_count[SCARLETT2_PORT_TYPE_MIX][SCARLETT2_PORT_IN];
struct scarlett2_usb_volume_status volume_status;
int err, i;
if (info->level_input_count) {
err = scarlett2_usb_get_config(
mixer,
SCARLETT2_CONFIG_LEVEL_SWITCH,
info->level_input_count,
private->level_switch);
if (err < 0)
return err;
}
if (info->pad_input_count) {
err = scarlett2_usb_get_config(
mixer,
SCARLETT2_CONFIG_PAD_SWITCH,
info->pad_input_count,
private->pad_switch);
if (err < 0)
return err;
}
err = scarlett2_update_sync(mixer);
if (err < 0)
return err;
err = scarlett2_usb_get_volume_status(mixer, &volume_status);
if (err < 0)
return err;
if (info->line_out_hw_vol)
for (i = 0; i < SCARLETT2_DIM_MUTE_COUNT; i++)
private->dim_mute[i] = !!volume_status.dim_mute[i];
private->master_vol = clamp(
volume_status.master_vol + SCARLETT2_VOLUME_BIAS,
0, SCARLETT2_VOLUME_BIAS);
for (i = 0; i < num_line_out; i++) {
int volume, mute;
private->vol_sw_hw_switch[i] =
info->line_out_hw_vol
&& volume_status.sw_hw_switch[i];
volume = private->vol_sw_hw_switch[i]
? volume_status.master_vol
: volume_status.sw_vol[i];
volume = clamp(volume + SCARLETT2_VOLUME_BIAS,
0, SCARLETT2_VOLUME_BIAS);
private->vol[i] = volume;
mute = private->vol_sw_hw_switch[i]
? private->dim_mute[SCARLETT2_BUTTON_MUTE]
: volume_status.mute_switch[i];
private->mute_switch[i] = mute;
}
for (i = 0; i < num_mixer_out; i++) {
err = scarlett2_usb_get_mix(mixer, i);
if (err < 0)
return err;
}
return scarlett2_usb_get_mux(mixer);
}
/* Notify on sync change */
static void scarlett2_notify_sync(
struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
private->sync_updated = 1;
snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->sync_ctl->id);
}
/* Notify on monitor change */
static void scarlett2_notify_monitor(
struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int num_line_out =
port_count[SCARLETT2_PORT_TYPE_ANALOGUE][SCARLETT2_PORT_OUT];
int i;
/* if line_out_hw_vol is 0, there are no controls to update */
if (!info->line_out_hw_vol)
return;
private->vol_updated = 1;
snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->master_vol_ctl->id);
for (i = 0; i < num_line_out; i++) {
if (!private->vol_sw_hw_switch[i])
continue;
snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->vol_ctls[i]->id);
}
}
/* Notify on dim/mute change */
static void scarlett2_notify_dim_mute(
struct usb_mixer_interface *mixer)
{
struct snd_card *card = mixer->chip->card;
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const int (*port_count)[SCARLETT2_PORT_DIRNS] = info->port_count;
int num_line_out =
port_count[SCARLETT2_PORT_TYPE_ANALOGUE][SCARLETT2_PORT_OUT];
int i;
private->vol_updated = 1;
if (!info->line_out_hw_vol)
return;
for (i = 0; i < SCARLETT2_DIM_MUTE_COUNT; i++)
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->dim_mute_ctls[i]->id);
for (i = 0; i < num_line_out; i++)
if (private->vol_sw_hw_switch[i])
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->mute_ctls[i]->id);
}
/* Interrupt callback */
static void scarlett2_notify(struct urb *urb)
{
struct usb_mixer_interface *mixer = urb->context;
int len = urb->actual_length;
int ustatus = urb->status;
u32 data;
if (ustatus != 0 || len != 8)
goto requeue;
data = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
if (data & SCARLETT2_USB_NOTIFY_SYNC)
scarlett2_notify_sync(mixer);
if (data & SCARLETT2_USB_NOTIFY_MONITOR)
scarlett2_notify_monitor(mixer);
if (data & SCARLETT2_USB_NOTIFY_DIM_MUTE)
scarlett2_notify_dim_mute(mixer);
requeue:
if (ustatus != -ENOENT &&
ustatus != -ECONNRESET &&
ustatus != -ESHUTDOWN) {
urb->dev = mixer->chip->dev;
usb_submit_urb(urb, GFP_ATOMIC);
}
}
static int scarlett2_init_notify(struct usb_mixer_interface *mixer)
{
struct usb_device *dev = mixer->chip->dev;
struct scarlett2_data *private = mixer->private_data;
unsigned int pipe = usb_rcvintpipe(dev, private->bEndpointAddress);
void *transfer_buffer;
if (mixer->urb) {
usb_audio_err(mixer->chip,
"%s: mixer urb already in use!\n", __func__);
return 0;
}
if (usb_pipe_type_check(dev, pipe))
return -EINVAL;
mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!mixer->urb)
return -ENOMEM;
transfer_buffer = kmalloc(private->wMaxPacketSize, GFP_KERNEL);
if (!transfer_buffer)
return -ENOMEM;
usb_fill_int_urb(mixer->urb, dev, pipe,
transfer_buffer, private->wMaxPacketSize,
scarlett2_notify, mixer, private->bInterval);
return usb_submit_urb(mixer->urb, GFP_KERNEL);
}
static int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer)
{
const struct scarlett2_device_info **info = scarlett2_devices;
int err;
/* Find device in scarlett2_devices */
while (*info && (*info)->usb_id != mixer->chip->usb_id)
info++;
if (!*info)
return -EINVAL;
/* Initialise private data */
err = scarlett2_init_private(mixer, *info);
if (err < 0)
return err;
/* Send proprietary USB initialisation sequence */
err = scarlett2_usb_init(mixer);
if (err < 0)
return err;
/* Read volume levels and controls from the interface */
err = scarlett2_read_configs(mixer);
if (err < 0)
return err;
/* Create the analogue output controls */
err = scarlett2_add_line_out_ctls(mixer);
if (err < 0)
return err;
/* Create the analogue input controls */
err = scarlett2_add_line_in_ctls(mixer);
if (err < 0)
return err;
/* Create the input, output, and mixer mux input selections */
err = scarlett2_add_mux_enums(mixer);
if (err < 0)
return err;
/* Create the matrix mixer controls */
err = scarlett2_add_mixer_ctls(mixer);
if (err < 0)
return err;
/* Create the level meter controls */
err = scarlett2_add_meter_ctl(mixer);
if (err < 0)
return err;
/* Create the sync control */
err = scarlett2_add_sync_ctl(mixer);
if (err < 0)
return err;
/* Set up the interrupt polling */
err = scarlett2_init_notify(mixer);
if (err < 0)
return err;
return 0;
}
int snd_scarlett_gen2_init(struct usb_mixer_interface *mixer)
{
struct snd_usb_audio *chip = mixer->chip;
int err;
/* only use UAC_VERSION_2 */
if (!mixer->protocol)
return 0;
if (!(chip->setup & SCARLETT2_ENABLE)) {
usb_audio_info(chip,
"Focusrite Scarlett Gen 2 Mixer Driver disabled; "
"use options snd_usb_audio vid=0x%04x pid=0x%04x "
"device_setup=1 to enable and report any issues "
"to g@b4.vu",
USB_ID_VENDOR(chip->usb_id),
USB_ID_PRODUCT(chip->usb_id));
return 0;
}
usb_audio_info(chip,
"Focusrite Scarlett Gen 2 Mixer Driver enabled pid=0x%04x",
USB_ID_PRODUCT(chip->usb_id));
err = snd_scarlett_gen2_controls_create(mixer);
if (err < 0)
usb_audio_err(mixer->chip,
"Error initialising Scarlett Mixer Driver: %d",
err);
return err;
}
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