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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).
*
* This ALSA mixer gives access to:
* - input, output, mixer-matrix muxes
* - 18x10 mixer-matrix gain stages
* - gain/volume 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)
/* 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[173] = {
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
/* Number of meters:
* 18 inputs, 20 outputs, 18 matrix inputs
*/
#define SCARLETT2_NUM_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,
};
/* Count of total I/O and number available at each sample rate */
enum {
SCARLETT2_PORT_IN = 0,
SCARLETT2_PORT_OUT = 1,
SCARLETT2_PORT_OUT_44 = 2,
SCARLETT2_PORT_OUT_88 = 3,
SCARLETT2_PORT_OUT_176 = 4,
SCARLETT2_PORT_DIRECTIONS = 5,
};
/* Hardware buttons on the 18i20 */
#define SCARLETT2_BUTTON_MAX 2
static const char *const scarlett2_button_names[SCARLETT2_BUTTON_MAX] = {
"Mute", "Dim"
};
/* Description of each hardware port type:
* - id: hardware ID for this port type
* - num: number of sources/destinations 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_ports {
u16 id;
int num[SCARLETT2_PORT_DIRECTIONS];
const char * const src_descr;
int src_num_offset;
const char * const dst_descr;
};
struct scarlett2_device_info {
u8 line_out_hw_vol; /* line out hw volume is sw controlled */
u8 button_count; /* number of buttons */
u8 level_input_count; /* inputs with level selectable */
u8 pad_input_count; /* inputs with pad selectable */
const char * const line_out_descrs[SCARLETT2_ANALOGUE_MAX];
struct scarlett2_ports ports[SCARLETT2_PORT_TYPE_COUNT];
};
struct scarlett2_mixer_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;
int num_mux_srcs;
u16 scarlett2_seq;
u8 vol_updated;
u8 master_vol;
u8 vol[SCARLETT2_ANALOGUE_MAX];
u8 vol_sw_hw_switch[SCARLETT2_ANALOGUE_MAX];
u8 level_switch[SCARLETT2_LEVEL_SWITCH_MAX];
u8 pad_switch[SCARLETT2_PAD_SWITCH_MAX];
u8 buttons[SCARLETT2_BUTTON_MAX];
struct snd_kcontrol *master_vol_ctl;
struct snd_kcontrol *vol_ctls[SCARLETT2_ANALOGUE_MAX];
struct snd_kcontrol *button_ctls[SCARLETT2_BUTTON_MAX];
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 = {
/* The first two analogue inputs can be switched between line
* and instrument levels.
*/
.level_input_count = 2,
/* The first two analogue inputs have an optional pad. */
.pad_input_count = 2,
.line_out_descrs = {
"Monitor L",
"Monitor R",
"Headphones L",
"Headphones R",
},
.ports = {
{
.id = 0x000,
.num = { 1, 0, 8, 8, 8 },
.src_descr = "Off",
.src_num_offset = 0,
},
{
.id = 0x080,
.num = { 4, 4, 4, 4, 4 },
.src_descr = "Analogue %d",
.src_num_offset = 1,
.dst_descr = "Analogue Output %02d Playback"
},
{
.id = 0x180,
.num = { 2, 2, 2, 2, 2 },
.src_descr = "S/PDIF %d",
.src_num_offset = 1,
.dst_descr = "S/PDIF Output %d Playback"
},
{
.id = 0x300,
.num = { 10, 18, 18, 18, 18 },
.src_descr = "Mix %c",
.src_num_offset = 65,
.dst_descr = "Mixer Input %02d Capture"
},
{
.id = 0x600,
.num = { 6, 6, 6, 6, 6 },
.src_descr = "PCM %d",
.src_num_offset = 1,
.dst_descr = "PCM %02d Capture"
},
},
};
static const struct scarlett2_device_info s18i8_gen2_info = {
/* The first two analogue inputs can be switched between line
* and instrument levels.
*/
.level_input_count = 2,
/* The first four analogue inputs have an optional pad. */
.pad_input_count = 4,
.line_out_descrs = {
"Monitor L",
"Monitor R",
"Headphones 1 L",
"Headphones 1 R",
"Headphones 2 L",
"Headphones 2 R",
},
.ports = {
{
.id = 0x000,
.num = { 1, 0, 8, 8, 4 },
.src_descr = "Off",
.src_num_offset = 0,
},
{
.id = 0x080,
.num = { 8, 6, 6, 6, 6 },
.src_descr = "Analogue %d",
.src_num_offset = 1,
.dst_descr = "Analogue Output %02d Playback"
},
{
/* S/PDIF outputs aren't available at 192KHz
* but are included in the USB mux I/O
* assignment message anyway
*/
.id = 0x180,
.num = { 2, 2, 2, 2, 2 },
.src_descr = "S/PDIF %d",
.src_num_offset = 1,
.dst_descr = "S/PDIF Output %d Playback"
},
{
.id = 0x200,
.num = { 8, 0, 0, 0, 0 },
.src_descr = "ADAT %d",
.src_num_offset = 1,
},
{
.id = 0x300,
.num = { 10, 18, 18, 18, 18 },
.src_descr = "Mix %c",
.src_num_offset = 65,
.dst_descr = "Mixer Input %02d Capture"
},
{
.id = 0x600,
.num = { 20, 18, 18, 14, 10 },
.src_descr = "PCM %d",
.src_num_offset = 1,
.dst_descr = "PCM %02d Capture"
},
},
};
static const struct scarlett2_device_info s18i20_gen2_info = {
/* The analogue line outputs on the 18i20 can be switched
* between software and hardware volume control
*/
.line_out_hw_vol = 1,
/* Mute and dim buttons */
.button_count = 2,
.line_out_descrs = {
"Monitor L",
"Monitor R",
NULL,
NULL,
NULL,
NULL,
"Headphones 1 L",
"Headphones 1 R",
"Headphones 2 L",
"Headphones 2 R",
},
.ports = {
{
.id = 0x000,
.num = { 1, 0, 8, 8, 6 },
.src_descr = "Off",
.src_num_offset = 0,
},
{
.id = 0x080,
.num = { 8, 10, 10, 10, 10 },
.src_descr = "Analogue %d",
.src_num_offset = 1,
.dst_descr = "Analogue Output %02d Playback"
},
{
/* S/PDIF outputs aren't available at 192KHz
* but are included in the USB mux I/O
* assignment message anyway
*/
.id = 0x180,
.num = { 2, 2, 2, 2, 2 },
.src_descr = "S/PDIF %d",
.src_num_offset = 1,
.dst_descr = "S/PDIF Output %d Playback"
},
{
.id = 0x200,
.num = { 8, 8, 8, 4, 0 },
.src_descr = "ADAT %d",
.src_num_offset = 1,
.dst_descr = "ADAT Output %d Playback"
},
{
.id = 0x300,
.num = { 10, 18, 18, 18, 18 },
.src_descr = "Mix %c",
.src_num_offset = 65,
.dst_descr = "Mixer Input %02d Capture"
},
{
.id = 0x600,
.num = { 20, 18, 18, 14, 10 },
.src_descr = "PCM %d",
.src_num_offset = 1,
.dst_descr = "PCM %02d Capture"
},
},
};
/* get the starting port index number for a given port type/direction */
static int scarlett2_get_port_start_num(const struct scarlett2_ports *ports,
int direction, int port_type)
{
int i, num = 0;
for (i = 0; i < port_type; i++)
num += ports[i].num[direction];
return num;
}
/*** USB Interactions ***/
/* Vendor-Specific Interface, Endpoint, MaxPacketSize, Interval */
#define SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE 5
#define SCARLETT2_USB_INTERRUPT_ENDPOINT 4
#define SCARLETT2_USB_INTERRUPT_MAX_DATA 64
#define SCARLETT2_USB_INTERRUPT_INTERVAL 3
/* Interrupt flags for volume and mute/dim button changes */
#define SCARLETT2_USB_INTERRUPT_VOL_CHANGE 0x400000
#define SCARLETT2_USB_INTERRUPT_BUTTON_CHANGE 0x200000
/* Commands for sending/receiving requests/responses */
#define SCARLETT2_USB_VENDOR_SPECIFIC_CMD_REQ 2
#define SCARLETT2_USB_VENDOR_SPECIFIC_CMD_RESP 3
#define SCARLETT2_USB_INIT_SEQ 0x00000000
#define SCARLETT2_USB_GET_METER_LEVELS 0x00001001
#define SCARLETT2_USB_SET_MIX 0x00002002
#define SCARLETT2_USB_SET_MUX 0x00003002
#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 {
/* mute & dim buttons */
u8 buttons[SCARLETT2_BUTTON_MAX];
u8 pad1;
/* software volume setting */
s16 sw_vol[SCARLETT2_ANALOGUE_MAX];
/* actual volume of output inc. dim (-18dB) */
s16 hw_vol[SCARLETT2_ANALOGUE_MAX];
u8 pad2[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_BUTTONS = 0,
SCARLETT2_CONFIG_LINE_OUT_VOLUME = 1,
SCARLETT2_CONFIG_SW_HW_SWITCH = 2,
SCARLETT2_CONFIG_LEVEL_SWITCH = 3,
SCARLETT2_CONFIG_PAD_SWITCH = 4,
SCARLETT2_CONFIG_COUNT = 5
};
/* 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] = {
/* Mute/Dim Buttons */
{
.offset = 0x31,
.size = 1,
.activate = 2
},
/* Line Out Volume */
{
.offset = 0x34,
.size = 2,
.activate = 1
},
/* SW/HW Volume Switch */
{
.offset = 0x66,
.size = 1,
.activate = 3
},
/* Level Switch */
{
.offset = 0x7c,
.size = 1,
.activate = 7
},
/* Pad Switch */
{
.offset = 0x84,
.size = 1,
.activate = 8
}
};
/* proprietary request/response format */
struct scarlett2_usb_packet {
u32 cmd;
u16 size;
u16 seq;
u32 error;
u32 pad;
u8 data[];
};
#define SCARLETT2_USB_PACKET_LEN (sizeof(struct scarlett2_usb_packet))
static void scarlett2_fill_request_header(struct scarlett2_mixer_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;
}
/* 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_mixer_data *private = mixer->private_data;
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 = NULL, *resp = NULL;
int err = 0;
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 = snd_usb_ctl_msg(mixer->chip->dev,
usb_sndctrlpipe(mixer->chip->dev, 0),
SCARLETT2_USB_VENDOR_SPECIFIC_CMD_REQ,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
0,
SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE,
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 = snd_usb_ctl_msg(mixer->chip->dev,
usb_sndctrlpipe(mixer->chip->dev, 0),
SCARLETT2_USB_VENDOR_SPECIFIC_CMD_RESP,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
0,
SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE,
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\n",
cmd, err);
err = -EINVAL;
goto unlock;
}
if (resp->cmd != req->cmd ||
resp->seq != req->seq ||
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",
le16_to_cpu(req->cmd), le16_to_cpu(resp->cmd),
le16_to_cpu(req->seq), le16_to_cpu(resp->seq),
resp_size, le16_to_cpu(resp->size),
le16_to_cpu(resp->error),
le16_to_cpu(resp->pad));
err = -EINVAL;
goto unlock;
}
if (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)
{
u32 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_mixer_data *private =
container_of(work, struct scarlett2_mixer_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 {
u32 offset;
u32 bytes;
s32 value;
} __packed req;
u32 req2;
int err;
struct scarlett2_mixer_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 {
u32 offset;
u32 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 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 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_mixer_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
struct {
u16 mix_num;
u16 data[SCARLETT2_INPUT_MIX_MAX];
} __packed req;
int i, j;
int num_mixer_in =
info->ports[SCARLETT2_PORT_TYPE_MIX].num[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->ports) to a hardware ID */
static u32 scarlett2_mux_src_num_to_id(const struct scarlett2_ports *ports,
int num)
{
int port_type;
for (port_type = 0;
port_type < SCARLETT2_PORT_TYPE_COUNT;
port_type++) {
if (num < ports[port_type].num[SCARLETT2_PORT_IN])
return ports[port_type].id | num;
num -= ports[port_type].num[SCARLETT2_PORT_IN];
}
/* Oops */
return 0;
}
/* Send USB messages to set mux inputs */
static int scarlett2_usb_set_mux(struct usb_mixer_interface *mixer)
{
struct scarlett2_mixer_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const struct scarlett2_ports *ports = info->ports;
int rate, port_dir_rate;
static const int assignment_order[SCARLETT2_PORT_TYPE_COUNT] = {
SCARLETT2_PORT_TYPE_PCM,
SCARLETT2_PORT_TYPE_ANALOGUE,
SCARLETT2_PORT_TYPE_SPDIF,
SCARLETT2_PORT_TYPE_ADAT,
SCARLETT2_PORT_TYPE_MIX,
SCARLETT2_PORT_TYPE_NONE,
};
struct {
u16 pad;
u16 num;
u32 data[SCARLETT2_MUX_MAX];
} __packed req;
req.pad = 0;
/* mux settings for each rate */
for (rate = 0, port_dir_rate = SCARLETT2_PORT_OUT_44;
port_dir_rate <= SCARLETT2_PORT_OUT_176;
rate++, port_dir_rate++) {
int order_num, i, err;
req.num = cpu_to_le16(rate);
for (order_num = 0, i = 0;
order_num < SCARLETT2_PORT_TYPE_COUNT;
order_num++) {
int port_type = assignment_order[order_num];
int j = scarlett2_get_port_start_num(ports,
SCARLETT2_PORT_OUT,
port_type);
int port_id = ports[port_type].id;
int channel;
for (channel = 0;
channel < ports[port_type].num[port_dir_rate];
channel++, i++, j++)
/* lower 12 bits for the destination and
* next 12 bits for the source
*/
req.data[i] = !port_id
? 0
: cpu_to_le32(
port_id |
channel |
scarlett2_mux_src_num_to_id(
ports, private->mux[j]
) << 12
);
/* skip private->mux[j] entries not output */
j += ports[port_type].num[SCARLETT2_PORT_OUT] -
ports[port_type].num[port_dir_rate];
}
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 *levels)
{
struct {
u16 pad;
u16 num_meters;
u32 magic;
} __packed req;
u32 resp[SCARLETT2_NUM_METERS];
int i, err;
req.pad = 0;
req.num_meters = cpu_to_le16(SCARLETT2_NUM_METERS);
req.magic = cpu_to_le32(SCARLETT2_USB_METER_LEVELS_GET_MAGIC);
err = scarlett2_usb(mixer, SCARLETT2_USB_GET_METER_LEVELS,
&req, sizeof(req), resp, sizeof(resp));
if (err < 0)
return err;
/* copy, convert to u16 */
for (i = 0; i < SCARLETT2_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;
strlcpy(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;
}
/*** 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_mixer_data *private = mixer->private_data;
const struct scarlett2_ports *ports = private->info->ports;
struct scarlett2_usb_volume_status volume_status;
int num_line_out =
ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT];
int err, i;
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);
for (i = 0; i < num_line_out; i++) {
if (private->vol_sw_hw_switch[i])
private->vol[i] = private->master_vol;
}
for (i = 0; i < private->info->button_count; i++)
private->buttons[i] = !!volume_status.buttons[i];
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_mixer_data *private = mixer->private_data;
if (private->vol_updated) {
mutex_lock(&private->data_mutex);
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_mixer_data *private = mixer->private_data;
int index = elem->control;
if (private->vol_updated) {
mutex_lock(&private->data_mutex);
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_mixer_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 }
};
/*** 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_mixer_data *private = elem->head.mixer->private_data;
ucontrol->value.enumerated.item[0] =
private->vol_sw_hw_switch[elem->control];
return 0;
}
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_mixer_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.integer.value[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)
*/
if (val)
private->vol_ctls[index]->vd[0].access &=
~SNDRV_CTL_ELEM_ACCESS_WRITE;
else
private->vol_ctls[index]->vd[0].access |=
SNDRV_CTL_ELEM_ACCESS_WRITE;
/* Reset volume to master volume */
private->vol[index] = private->master_vol;
/* 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;
/* Notify of RO/RW change */
snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_INFO,
&private->vol_ctls[index]->id);
/* Send SW/HW switch change to the device */
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_SW_HW_SWITCH,
index, val);
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_mixer_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_mixer_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.integer.value[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);
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_mixer_data *private = elem->head.mixer->private_data;
ucontrol->value.enumerated.item[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_mixer_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);
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,
};
/*** Mute/Dim Controls ***/
static int scarlett2_button_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_mixer_data *private = mixer->private_data;
if (private->vol_updated) {
mutex_lock(&private->data_mutex);
scarlett2_update_volumes(mixer);
mutex_unlock(&private->data_mutex);
}
ucontrol->value.enumerated.item[0] = private->buttons[elem->control];
return 0;
}
static int scarlett2_button_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_mixer_data *private = mixer->private_data;
int index = elem->control;
int oval, val, err = 0;
mutex_lock(&private->data_mutex);
oval = private->buttons[index];
val = !!ucontrol->value.integer.value[0];
if (oval == val)
goto unlock;
private->buttons[index] = val;
/* Send switch change to the device */
err = scarlett2_usb_set_config(mixer, SCARLETT2_CONFIG_BUTTONS,
index, val);
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static const struct snd_kcontrol_new scarlett2_button_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "",
.info = snd_ctl_boolean_mono_info,
.get = scarlett2_button_ctl_get,
.put = scarlett2_button_ctl_put
};
/*** Create the analogue output controls ***/
static int scarlett2_add_line_out_ctls(struct usb_mixer_interface *mixer)
{
struct scarlett2_mixer_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const struct scarlett2_ports *ports = info->ports;
int num_line_out =
ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[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;
/* Make the fader read-only if the SW/HW switch is set to HW */
if (private->vol_sw_hw_switch[i])
private->vol_ctls[i]->vd[0].access &=
~SNDRV_CTL_ELEM_ACCESS_WRITE;
/* 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 HW button controls */
for (i = 0; i < private->info->button_count; i++) {
err = scarlett2_add_new_ctl(mixer, &scarlett2_button_ctl,
i, 1, scarlett2_button_names[i],
&private->button_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_mixer_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
int err, i;
char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
/* Add input level (line/inst) controls */
for (i = 0; i < info->level_input_count; i++) {
snprintf(s, sizeof(s), "Line In %d Level Capture Enum", i + 1);
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), "Line In %d Pad Capture Switch", i + 1);
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_mixer_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_mixer_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const struct scarlett2_ports *ports = info->ports;
int oval, val, num_mixer_in, mix_num, err = 0;
mutex_lock(&private->data_mutex);
oval = private->mix[elem->control];
val = ucontrol->value.integer.value[0];
num_mixer_in = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT];
mix_num = elem->control / num_mixer_in;
if (oval == val)
goto unlock;
private->mix[elem->control] = 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_mixer_data *private = mixer->private_data;
const struct scarlett2_ports *ports = private->info->ports;
int err, i, j;
int index;
char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
int num_inputs = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT];
int num_outputs = ports[SCARLETT2_PORT_TYPE_MIX].num[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_mixer_data *private = elem->head.mixer->private_data;
const struct scarlett2_ports *ports = private->info->ports;
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 < ports[port_type].num[SCARLETT2_PORT_IN]) {
sprintf(uinfo->value.enumerated.name,
ports[port_type].src_descr,
item + ports[port_type].src_num_offset);
return 0;
}
item -= ports[port_type].num[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_mixer_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_mixer_data *private = mixer->private_data;
int index = elem->control;
int oval, val, err = 0;
mutex_lock(&private->data_mutex);
oval = private->mux[index];
val = clamp(ucontrol->value.integer.value[0],
0L, private->num_mux_srcs - 1L);
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_mixer_data *private = mixer->private_data;
const struct scarlett2_ports *ports = private->info->ports;
int port_type, channel, i;
for (i = 0, port_type = 0;
port_type < SCARLETT2_PORT_TYPE_COUNT;
port_type++) {
for (channel = 0;
channel < ports[port_type].num[SCARLETT2_PORT_OUT];
channel++, i++) {
int err;
char s[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
const char *const descr = 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_NUM_METERS];
int i, err;
err = scarlett2_usb_get_meter_levels(elem->head.mixer, 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)
{
return scarlett2_add_new_ctl(mixer, &scarlett2_meter_ctl,
0, SCARLETT2_NUM_METERS,
"Level Meter", NULL);
}
/*** Cleanup/Suspend Callbacks ***/
static void scarlett2_private_free(struct usb_mixer_interface *mixer)
{
struct scarlett2_mixer_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_mixer_data *private = mixer->private_data;
if (cancel_delayed_work_sync(&private->work))
scarlett2_config_save(private->mixer);
}
/*** Initialisation ***/
static int scarlett2_count_mux_srcs(const struct scarlett2_ports *ports)
{
int port_type, count = 0;
for (port_type = 0;
port_type < SCARLETT2_PORT_TYPE_COUNT;
port_type++)
count += ports[port_type].num[SCARLETT2_PORT_IN];
return count;
}
/* Default routing connects PCM outputs and inputs to Analogue,
* S/PDIF, then ADAT
*/
static void scarlett2_init_routing(u8 *mux,
const struct scarlett2_ports *ports)
{
int i, input_num, input_count, port_type;
int output_num, output_count, port_type_connect_num;
static const int connect_order[] = {
SCARLETT2_PORT_TYPE_ANALOGUE,
SCARLETT2_PORT_TYPE_SPDIF,
SCARLETT2_PORT_TYPE_ADAT,
-1
};
/* Assign PCM inputs (routing outputs) */
output_num = scarlett2_get_port_start_num(ports,
SCARLETT2_PORT_OUT,
SCARLETT2_PORT_TYPE_PCM);
output_count = ports[SCARLETT2_PORT_TYPE_PCM].num[SCARLETT2_PORT_OUT];
for (port_type = connect_order[port_type_connect_num = 0];
port_type >= 0;
port_type = connect_order[++port_type_connect_num]) {
input_num = scarlett2_get_port_start_num(
ports, SCARLETT2_PORT_IN, port_type);
input_count = ports[port_type].num[SCARLETT2_PORT_IN];
for (i = 0;
i < input_count && output_count;
i++, output_count--)
mux[output_num++] = input_num++;
}
/* Assign PCM outputs (routing inputs) */
input_num = scarlett2_get_port_start_num(ports,
SCARLETT2_PORT_IN,
SCARLETT2_PORT_TYPE_PCM);
input_count = ports[SCARLETT2_PORT_TYPE_PCM].num[SCARLETT2_PORT_IN];
for (port_type = connect_order[port_type_connect_num = 0];
port_type >= 0;
port_type = connect_order[++port_type_connect_num]) {
output_num = scarlett2_get_port_start_num(
ports, SCARLETT2_PORT_OUT, port_type);
output_count = ports[port_type].num[SCARLETT2_PORT_OUT];
for (i = 0;
i < output_count && input_count;
i++, input_count--)
mux[output_num++] = input_num++;
}
}
/* Initialise private data, routing, sequence number */
static int scarlett2_init_private(struct usb_mixer_interface *mixer,
const struct scarlett2_device_info *info)
{
struct scarlett2_mixer_data *private =
kzalloc(sizeof(struct scarlett2_mixer_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);
private->info = info;
private->num_mux_srcs = scarlett2_count_mux_srcs(info->ports);
private->scarlett2_seq = 0;
private->mixer = mixer;
mixer->private_data = private;
mixer->private_free = scarlett2_private_free;
mixer->private_suspend = scarlett2_private_suspend;
/* Setup default routing */
scarlett2_init_routing(private->mux, info->ports);
/* Initialise the sequence number used for the proprietary commands */
return scarlett2_usb(mixer, SCARLETT2_USB_INIT_SEQ, NULL, 0, NULL, 0);
}
/* Read line-in config and line-out volume settings on start */
static int scarlett2_read_configs(struct usb_mixer_interface *mixer)
{
struct scarlett2_mixer_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
const struct scarlett2_ports *ports = info->ports;
int num_line_out =
ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT];
u8 level_switches[SCARLETT2_LEVEL_SWITCH_MAX];
u8 pad_switches[SCARLETT2_PAD_SWITCH_MAX];
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,
level_switches);
if (err < 0)
return err;
for (i = 0; i < info->level_input_count; i++)
private->level_switch[i] = level_switches[i];
}
if (info->pad_input_count) {
err = scarlett2_usb_get_config(
mixer,
SCARLETT2_CONFIG_PAD_SWITCH,
info->pad_input_count,
pad_switches);
if (err < 0)
return err;
for (i = 0; i < info->pad_input_count; i++)
private->pad_switch[i] = pad_switches[i];
}
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);
for (i = 0; i < num_line_out; i++) {
int volume;
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;
}
for (i = 0; i < info->button_count; i++)
private->buttons[i] = !!volume_status.buttons[i];
return 0;
}
/* Notify on volume change */
static void scarlett2_mixer_interrupt_vol_change(
struct usb_mixer_interface *mixer)
{
struct scarlett2_mixer_data *private = mixer->private_data;
const struct scarlett2_ports *ports = private->info->ports;
int num_line_out =
ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT];
int i;
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 button change */
static void scarlett2_mixer_interrupt_button_change(
struct usb_mixer_interface *mixer)
{
struct scarlett2_mixer_data *private = mixer->private_data;
int i;
private->vol_updated = 1;
for (i = 0; i < private->info->button_count; i++)
snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->button_ctls[i]->id);
}
/* Interrupt callback */
static void scarlett2_mixer_interrupt(struct urb *urb)
{
struct usb_mixer_interface *mixer = urb->context;
int len = urb->actual_length;
int ustatus = urb->status;
u32 data;
if (ustatus != 0)
goto requeue;
if (len == 8) {
data = le32_to_cpu(*(u32 *)urb->transfer_buffer);
if (data & SCARLETT2_USB_INTERRUPT_VOL_CHANGE)
scarlett2_mixer_interrupt_vol_change(mixer);
if (data & SCARLETT2_USB_INTERRUPT_BUTTON_CHANGE)
scarlett2_mixer_interrupt_button_change(mixer);
} else {
usb_audio_err(mixer->chip,
"scarlett mixer interrupt length %d\n", len);
}
requeue:
if (ustatus != -ENOENT &&
ustatus != -ECONNRESET &&
ustatus != -ESHUTDOWN) {
urb->dev = mixer->chip->dev;
usb_submit_urb(urb, GFP_ATOMIC);
}
}
static int scarlett2_mixer_status_create(struct usb_mixer_interface *mixer)
{
struct usb_device *dev = mixer->chip->dev;
unsigned int pipe = usb_rcvintpipe(dev,
SCARLETT2_USB_INTERRUPT_ENDPOINT);
void *transfer_buffer;
if (mixer->urb) {
usb_audio_err(mixer->chip,
"%s: mixer urb already in use!\n", __func__);
return 0;
}
if (snd_usb_pipe_sanity_check(dev, pipe))
return -EINVAL;
mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!mixer->urb)
return -ENOMEM;
transfer_buffer = kmalloc(SCARLETT2_USB_INTERRUPT_MAX_DATA, GFP_KERNEL);
if (!transfer_buffer)
return -ENOMEM;
usb_fill_int_urb(mixer->urb, dev, pipe,
transfer_buffer, SCARLETT2_USB_INTERRUPT_MAX_DATA,
scarlett2_mixer_interrupt, mixer,
SCARLETT2_USB_INTERRUPT_INTERVAL);
return usb_submit_urb(mixer->urb, GFP_KERNEL);
}
/* Entry point */
int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer)
{
const struct scarlett2_device_info *info;
int err;
/* only use UAC_VERSION_2 */
if (!mixer->protocol)
return 0;
switch (mixer->chip->usb_id) {
case USB_ID(0x1235, 0x8203):
info = &s6i6_gen2_info;
break;
case USB_ID(0x1235, 0x8204):
info = &s18i8_gen2_info;
break;
case USB_ID(0x1235, 0x8201):
info = &s18i20_gen2_info;
break;
default: /* device not (yet) supported */
return -EINVAL;
}
if (!(mixer->chip->setup & SCARLETT2_ENABLE)) {
usb_audio_err(mixer->chip,
"Focusrite Scarlett Gen 2 Mixer Driver disabled; "
"use options snd_usb_audio device_setup=1 "
"to enable and report any issues to g@b4.vu");
return 0;
}
/* Initialise private data, routing, sequence number */
err = scarlett2_init_private(mixer, info);
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;
/* Set up the interrupt polling if there are hardware buttons */
if (info->button_count) {
err = scarlett2_mixer_status_create(mixer);
if (err < 0)
return err;
}
return 0;
}
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