* [PATCH 0/1] USB Audio Device Class 3.0 support
@ 2017-11-07 2:01 Ruslan Bilovol
2017-11-07 2:01 ` [PATCH 1/1] ALSA: usb: initial " Ruslan Bilovol
0 siblings, 1 reply; 18+ messages in thread
From: Ruslan Bilovol @ 2017-11-07 2:01 UTC (permalink / raw)
To: Takashi Iwai; +Cc: Greg Kroah-Hartman, alsa-devel, linux-kernel
Hi Takashi,
This patch adds initial USB Audio Device Class 3.0 [1]
support to the ALSA that we discussed at ELCE.
The patch was tested with UAC3 gadget [2] that I posted
to USB mailing list before. It is good for working with
BADD device which implements such topologies like
BAIF (Basic Audio Input Functions), BAOF (Basic Audio
Output Functions) or compbination of both.
UAC3 spec has changed descriptors laout and many other
codes comparing to UAC2 spec, thus making reuse of existing
sources impossible or quite complex.
There are still many areas of improvement, as this patch
doesn't have UAC3 Mixer Unit support nor some new features
like Power Management
I tested this with BeagleBone Black as UAC3 gadget device.
[1] http://www.usb.org/developers/docs/devclass_docs/USB_Audio_v3.0.zip
[2] http://www.spinics.net/lists/linux-usb/msg162482.html
Ruslan Bilovol (1):
ALSA: usb: initial USB Audio Device Class 3.0 support
include/linux/usb/audio-v2.h | 4 +-
include/linux/usb/audio-v3.h | 343 +++++++++++++++++++++++++++++++++++++++++
include/uapi/linux/usb/audio.h | 1 +
sound/usb/card.c | 7 +-
sound/usb/card.h | 2 +-
sound/usb/clock.c | 228 ++++++++++++++++++++++++---
sound/usb/clock.h | 4 +-
sound/usb/format.c | 87 +++++++++--
sound/usb/format.h | 6 +-
sound/usb/mixer.c | 332 ++++++++++++++++++++++++++-------------
sound/usb/stream.c | 296 ++++++++++++++++++++++++++++++-----
11 files changed, 1117 insertions(+), 193 deletions(-)
create mode 100644 include/linux/usb/audio-v3.h
--
1.9.1
^ permalink raw reply [flat|nested] 18+ messages in thread
* [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-07 2:01 [PATCH 0/1] USB Audio Device Class 3.0 support Ruslan Bilovol
@ 2017-11-07 2:01 ` Ruslan Bilovol
2017-11-08 14:38 ` Takashi Iwai
` (2 more replies)
0 siblings, 3 replies; 18+ messages in thread
From: Ruslan Bilovol @ 2017-11-07 2:01 UTC (permalink / raw)
To: Takashi Iwai; +Cc: Greg Kroah-Hartman, alsa-devel, linux-kernel
Recently released USB Audio Class 3.0 specification
introduces many significant changes comparing to
previous versions, like
- new Power Domains, support for LPM/L1
- new Cluster descriptor
- changed layout of all class-specific descriptors
- new High Capability descriptors
- New class-specific String descriptors
- new and removed units
- additional sources for interrupts
- removed Type II Audio Data Formats
- ... and many other things (check spec)
It also provides backward compatibility through
multiple configurations, as well as requires
mandatory support for BADD (Basic Audio Device
Definition) on each ADC3.0 compliant device
This patch adds initial support of UAC3 specification
that is enough for Generic I/O Profile (BAOF, BAIF)
device support from BADD document.
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
---
include/linux/usb/audio-v2.h | 4 +-
include/linux/usb/audio-v3.h | 343 +++++++++++++++++++++++++++++++++++++++++
include/uapi/linux/usb/audio.h | 1 +
sound/usb/card.c | 7 +-
sound/usb/card.h | 2 +-
sound/usb/clock.c | 228 ++++++++++++++++++++++++---
sound/usb/clock.h | 4 +-
sound/usb/format.c | 87 +++++++++--
sound/usb/format.h | 6 +-
sound/usb/mixer.c | 332 ++++++++++++++++++++++++++-------------
sound/usb/stream.c | 296 ++++++++++++++++++++++++++++++-----
11 files changed, 1117 insertions(+), 193 deletions(-)
create mode 100644 include/linux/usb/audio-v3.h
diff --git a/include/linux/usb/audio-v2.h b/include/linux/usb/audio-v2.h
index fd73bc0..8ab3fb0 100644
--- a/include/linux/usb/audio-v2.h
+++ b/include/linux/usb/audio-v2.h
@@ -33,12 +33,12 @@
*
*/
-static inline bool uac2_control_is_readable(u32 bmControls, u8 control)
+static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control)
{
return (bmControls >> (control * 2)) & 0x1;
}
-static inline bool uac2_control_is_writeable(u32 bmControls, u8 control)
+static inline bool uac_v2v3_control_is_writeable(u32 bmControls, u8 control)
{
return (bmControls >> (control * 2)) & 0x2;
}
diff --git a/include/linux/usb/audio-v3.h b/include/linux/usb/audio-v3.h
new file mode 100644
index 0000000..cbbe51e
--- /dev/null
+++ b/include/linux/usb/audio-v3.h
@@ -0,0 +1,343 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2017 Ruslan Bilovol <ruslan.bilovol@gmail.com>
+ *
+ * This file holds USB constants and structures defined
+ * by the USB DEVICE CLASS DEFINITION FOR AUDIO DEVICES Release 3.0.
+ */
+
+#ifndef __LINUX_USB_AUDIO_V3_H
+#define __LINUX_USB_AUDIO_V3_H
+
+#include <linux/types.h>
+
+/*
+ * v1.0, v2.0 and v3.0 of this standard have many things in common. For the rest
+ * of the definitions, please refer to audio.h and audio-v2.h
+ */
+
+/* All High Capability descriptors have these 2 fields at the beginning */
+struct uac3_hc_descriptor_header {
+ __le16 wLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __le16 wDescriptorID;
+} __attribute__ ((packed));
+
+/* 4.3.1 CLUSTER DESCRIPTOR HEADER */
+struct uac3_cluster_header_descriptor {
+ __le16 wLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __le16 wDescriptorID;
+ __u8 bNrChannels;
+} __attribute__ ((packed));
+
+/* 4.3.2.1 SEGMENTS */
+struct uac3_cluster_segment_descriptor {
+ __le16 wLength;
+ __u8 bSegmentType;
+ /* __u8[0]; segment-specific data */
+} __attribute__ ((packed));
+
+/* 4.3.2.1.1 END SEGMENT */
+struct uac3_cluster_end_segment_descriptor {
+ __le16 wLength;
+ __u8 bSegmentType; /* Constant END_SEGMENT */
+} __attribute__ ((packed));
+
+/* 4.3.2.1.3.1 INFORMATION SEGMENT */
+struct uac3_cluster_information_segment_descriptor {
+ __le16 wLength;
+ __u8 bSegmentType;
+ __u8 bChPurpose;
+ __u8 bChRelationship;
+ __u8 bChGroupID;
+} __attribute__ ((packed));
+
+/* 4.5.2 CLASS-SPECIFIC AC INTERFACE DESCRIPTOR */
+struct uac3_ac_header_descriptor {
+ __u8 bLength; /* 10 */
+ __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
+ __u8 bDescriptorSubtype; /* HEADER descriptor subtype */
+ __u8 bCategory;
+
+ /* includes Clock Source, Unit, Terminal, and Power Domain desc. */
+ __le16 wTotalLength;
+
+ __le32 bmControls;
+} __attribute__ ((packed));
+
+/* 4.5.2.12 CLOCK SOURCE DESCRIPTOR */
+struct uac3_clock_source_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bClockID;
+ __u8 bmAttributes;
+ __le32 bmControls;
+ __u8 bReferenceTerminal;
+ __le16 wClockSourceStr;
+} __attribute__((packed));
+
+/* bmAttribute fields */
+#define UAC3_CLOCK_SOURCE_TYPE_EXT 0x0
+#define UAC3_CLOCK_SOURCE_TYPE_INT 0x1
+#define UAC3_CLOCK_SOURCE_ASYNC (0 << 2)
+#define UAC3_CLOCK_SOURCE_SYNCED_TO_SOF (1 << 1)
+
+/* 4.5.2.13 CLOCK SELECTOR DESCRIPTOR */
+struct uac3_clock_selector_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bClockID;
+ __u8 bNrInPins;
+ __u8 baCSourceID[];
+ /* bmControls and wCSelectorDescrStr omitted */
+} __attribute__((packed));
+
+/* 4.5.2.14 CLOCK MULTIPLIER DESCRIPTOR */
+struct uac3_clock_multiplier_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bClockID;
+ __u8 bCSourceID;
+ __le32 bmControls;
+ __le16 wCMultiplierDescrStr;
+} __attribute__((packed));
+
+/* 4.5.2.15 POWER DOMAIN DESCRIPTOR */
+struct uac3_power_domain_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bPowerDomainID;
+ __le16 waRecoveryTime1;
+ __le16 waRecoveryTime2;
+ __u8 bNrEntities;
+ __u8 baEntityID[];
+ /* wPDomainDescrStr omitted */
+} __attribute__((packed));
+
+/* As above, but more useful for defining your own descriptors */
+#define DECLARE_UAC3_POWER_DOMAIN_DESCRIPTOR(n) \
+struct uac3_power_domain_descriptor_##n { \
+ __u8 bLength; \
+ __u8 bDescriptorType; \
+ __u8 bDescriptorSubtype; \
+ __u8 bPowerDomainID; \
+ __le16 waRecoveryTime1; \
+ __le16 waRecoveryTime2; \
+ __u8 bNrEntities; \
+ __u8 baEntityID[n]; \
+ __le16 wPDomainDescrStr; \
+} __attribute__ ((packed))
+
+/* 4.5.2.1 INPUT TERMINAL DESCRIPTOR */
+struct uac3_input_terminal_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bTerminalID;
+ __le16 wTerminalType;
+ __u8 bAssocTerminal;
+ __u8 bCSourceID;
+ __le32 bmControls;
+ __le16 wClusterDescrID;
+ __le16 wExTerminalDescrID;
+ __le16 wConnectorsDescrID;
+ __le16 wTerminalDescrStr;
+} __attribute__((packed));
+
+/* 4.5.2.2 OUTPUT TERMINAL DESCRIPTOR */
+struct uac3_output_terminal_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bTerminalID;
+ __le16 wTerminalType;
+ __u8 bAssocTerminal;
+ __u8 bSourceID;
+ __u8 bCSourceID;
+ __le32 bmControls;
+ __le16 wExTerminalDescrID;
+ __le16 wConnectorsDescrID;
+ __le16 wTerminalDescrStr;
+} __attribute__((packed));
+
+/* 4.5.2.7 FEATURE UNIT DESCRIPTOR */
+struct uac3_feature_unit_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bUnitID;
+ __u8 bSourceID;
+ /* bmaControls is actually u32,
+ * but u8 is needed for the hybrid parser */
+ __u8 bmaControls[0]; /* variable length */
+ /* wFeatureDescrStr omitted */
+} __attribute__((packed));
+
+#define UAC3_DT_FEATURE_UNIT_SIZE(ch) (7 + ((ch) + 1) * 4)
+
+/* As above, but more useful for defining your own descriptors */
+#define DECLARE_UAC3_FEATURE_UNIT_DESCRIPTOR(ch) \
+struct uac3_feature_unit_descriptor_##ch { \
+ __u8 bLength; \
+ __u8 bDescriptorType; \
+ __u8 bDescriptorSubtype; \
+ __u8 bUnitID; \
+ __u8 bSourceID; \
+ __u8 bControlSize; \
+ __le32 bmaControls[ch + 1]; \
+ __le16 wFeatureDescrStr; \
+} __attribute__ ((packed))
+
+/* 4.7.2 CLASS-SPECIFIC AS INTERFACE DESCRIPTOR */
+struct uac3_as_header_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bTerminalLink;
+ __le32 bmControls;
+ __le16 wClusterDescrID;
+ __le64 bmFormats;
+ __u8 bSubslotSize;
+ __u8 bBitResolution;
+ __le16 bmAuxProtocols;
+ __u8 bControlSize;
+} __attribute__((packed));
+
+#define UAC3_FORMAT_TYPE_I_RAW_DATA (1 << 6)
+
+/* 4.8.1.2 CLASS-SPECIFIC AS ISOCHRONOUS AUDIO DATA ENDPOINT DESCRIPTOR */
+struct uac3_iso_endpoint_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __le32 bmControls;
+ __u8 bLockDelayUnits;
+ __le16 wLockDelay;
+} __attribute__((packed));
+
+#define UAC3_CONTROL_PITCH (3 << 0)
+#define UAC3_CONTROL_DATA_OVERRUN (3 << 2)
+#define UAC3_CONTROL_DATA_UNDERRUN (3 << 4)
+
+/* 6.1 INTERRUPT DATA MESSAGE */
+#define UAC3_INTERRUPT_DATA_MSG_VENDOR (1 << 0)
+#define UAC3_INTERRUPT_DATA_MSG_EP (1 << 1)
+
+struct uac3_interrupt_data_msg {
+ __u8 bInfo;
+ __u8 bSourceType;
+ __le16 wValue;
+ __le16 wIndex;
+} __attribute__((packed));
+
+/* A.2 AUDIO AUDIO FUNCTION SUBCLASS CODES */
+#define UAC3_FUNCTION_SUBCLASS_UNDEFINED 0x00
+#define UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 0x01
+#define UAC3_FUNCTION_SUBCLASS_GENERIC_IO 0x20
+#define UAC3_FUNCTION_SUBCLASS_HEADPHONE 0x21
+#define UAC3_FUNCTION_SUBCLASS_SPEAKER 0x22
+#define UAC3_FUNCTION_SUBCLASS_MICROPHONE 0x23
+#define UAC3_FUNCTION_SUBCLASS_HEADSET 0x24
+#define UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER 0x25
+#define UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE 0x26
+
+/* A.7 AUDIO FUNCTION CATEGORY CODES */
+#define UAC3_FUNCTION_SUBCLASS_UNDEFINED 0x00
+#define UAC3_FUNCTION_DESKTOP_SPEAKER 0x01
+#define UAC3_FUNCTION_HOME_THEATER 0x02
+#define UAC3_FUNCTION_MICROPHONE 0x03
+#define UAC3_FUNCTION_HEADSET 0x04
+#define UAC3_FUNCTION_TELEPHONE 0x05
+#define UAC3_FUNCTION_CONVERTER 0x06
+#define UAC3_FUNCTION_SOUND_RECORDER 0x07
+#define UAC3_FUNCTION_IO_BOX 0x08
+#define UAC3_FUNCTION_MUSICAL_INSTRUMENT 0x09
+#define UAC3_FUNCTION_PRO_AUDIO 0x0a
+#define UAC3_FUNCTION_AUDIO_VIDEO 0x0b
+#define UAC3_FUNCTION_CONTROL_PANEL 0x0c
+#define UAC3_FUNCTION_HEADPHONE 0x0d
+#define UAC3_FUNCTION_GENERIC_SPEAKER 0x0e
+#define UAC3_FUNCTION_HEADSET_ADAPTER 0x0f
+#define UAC3_FUNCTION_SPEAKERPHONE 0x10
+#define UAC3_FUNCTION_OTHER 0xff
+
+/* A.8 AUDIO CLASS-SPECIFIC DESCRIPTOR TYPES */
+#define UAC3_CS_UNDEFINED 0x20
+#define UAC3_CS_DEVICE 0x21
+#define UAC3_CS_CONFIGURATION 0x22
+#define UAC3_CS_STRING 0x23
+#define UAC3_CS_INTERFACE 0x24
+#define UAC3_CS_ENDPOINT 0x25
+#define UAC3_CS_CLUSTER 0x26
+
+/* A.10 CLUSTER DESCRIPTOR SEGMENT TYPES */
+#define UAC3_SEGMENT_UNDEFINED 0x00
+#define UAC3_CLUSTER_DESCRIPTION 0x01
+#define UAC3_CLUSTER_VENDOR_DEFINED 0x1F
+#define UAC3_CHANNEL_INFORMATION 0x20
+#define UAC3_CHANNEL_AMBISONIC 0x21
+#define UAC3_CHANNEL_DESCRIPTION 0x22
+#define UAC3_CHANNEL_VENDOR_DEFINED 0xFE
+#define UAC3_END_SEGMENT 0xFF
+
+/* A.11 CHANNEL PURPOSE DEFINITIONS */
+#define UAC3_PURPOSE_UNDEFINED 0x00
+#define UAC3_PURPOSE_GENERIC_AUDIO 0x01
+#define UAC3_PURPOSE_VOICE 0x02
+#define UAC3_PURPOSE_SPEECH 0x03
+#define UAC3_PURPOSE_AMBIENT 0x04
+#define UAC3_PURPOSE_REFERENCE 0x05
+#define UAC3_PURPOSE_ULTRASONIC 0x06
+#define UAC3_PURPOSE_VIBROKINETIC 0x07
+#define UAC3_PURPOSE_NON_AUDIO 0xFF
+
+/* A.12 CHANNEL RELATIONSHIP DEFINITIONS */
+/* FIXME: spec is missing these constants. Few found in BasicAudioDevice3.pdf */
+#define UAC3_CH_RELATIONSHIP_UNDEFINED 0x00
+#define UAC3_CH_MONO 0x01
+#define UAC3_CH_LEFT 0x02
+#define UAC3_CH_RIGHT 0x03
+#define UAC3_CH_FRONT_LEFT 0x80
+#define UAC3_CH_FRONT_RIGHT 0x81
+#define UAC3_CH_FRONT_CENTER 0x82
+#define UAC3_CH_SURROUND_ARRAY_LEFT 0x89
+#define UAC3_CH_SURROUND_ARRAY_RIGHT 0x8A
+#define UAC3_CH_LOW_FREQUENCY_EFFECTS 0xB8
+
+/* A.15 AUDIO CLASS-SPECIFIC AC INTERFACE DESCRIPTOR SUBTYPES */
+/* see audio.h for the rest, which is identical to v1 */
+#define UAC3_EXTENDED_TERMINAL 0x04
+#define UAC3_MIXER_UNIT 0x05
+#define UAC3_SELECTOR_UNIT 0x06
+#define UAC3_FEATURE_UNIT 0x07
+#define UAC3_EFFECT_UNIT 0x08
+#define UAC3_PROCESSING_UNIT 0x09
+#define UAC3_EXTENSION_UNIT 0x0a
+#define UAC3_CLOCK_SOURCE 0x0b
+#define UAC3_CLOCK_SELECTOR 0x0c
+#define UAC3_CLOCK_MULTIPLIER 0x0d
+#define UAC3_SAMPLE_RATE_CONVERTER 0x0e
+#define UAC3_CONNECTORS 0x0f
+#define UAC3_POWER_DOMAIN 0x10
+
+/* A.22 AUDIO CLASS-SPECIFIC REQUEST CODES */
+#define UAC3_CS_REQ_CUR 0x01
+#define UAC3_CS_REQ_RANGE 0x02
+#define UAC3_CS_REQ_MEM 0x03
+#define UAC3_CS_REQ_INTEN 0x04
+#define UAC3_CS_REQ_STRING 0x05
+#define UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR 0x06
+
+/* A.23.1 AUDIOCONTROL INTERFACE CONTROL SELECTORS */
+#define UAC3_AC_CONTROL_UNDEFINED 0x00
+#define UAC3_AC_ACTIVE_INTERFACE_CONTROL 0x01
+#define UAC3_AC_POWER_DOMAIN_CONTROL 0x02
+
+#endif /* __LINUX_USB_AUDIO_V3_H */
diff --git a/include/uapi/linux/usb/audio.h b/include/uapi/linux/usb/audio.h
index a4680a5..66ec2ae 100644
--- a/include/uapi/linux/usb/audio.h
+++ b/include/uapi/linux/usb/audio.h
@@ -26,6 +26,7 @@
/* bInterfaceProtocol values to denote the version of the standard used */
#define UAC_VERSION_1 0x00
#define UAC_VERSION_2 0x20
+#define UAC_VERSION_3 0x30
/* A.2 Audio Interface Subclass Codes */
#define USB_SUBCLASS_AUDIOCONTROL 0x01
diff --git a/sound/usb/card.c b/sound/usb/card.c
index 3dc36d9..df3f0ab 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -7,6 +7,7 @@
* Alan Cox (alan@lxorguk.ukuu.org.uk)
* Thomas Sailer (sailer@ife.ee.ethz.ch)
*
+ * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -44,6 +45,7 @@
#include <linux/mutex.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
#include <linux/module.h>
#include <sound/control.h>
@@ -261,7 +263,8 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
break;
}
- case UAC_VERSION_2: {
+ case UAC_VERSION_2:
+ case UAC_VERSION_3: {
struct usb_interface_assoc_descriptor *assoc =
usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
@@ -281,7 +284,7 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
}
if (!assoc) {
- dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n");
+ dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
return -EINVAL;
}
diff --git a/sound/usb/card.h b/sound/usb/card.h
index 111b0f0..5e2934f 100644
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -21,7 +21,7 @@ struct audioformat {
unsigned char endpoint; /* endpoint */
unsigned char ep_attr; /* endpoint attributes */
unsigned char datainterval; /* log_2 of data packet interval */
- unsigned char protocol; /* UAC_VERSION_1/2 */
+ unsigned char protocol; /* UAC_VERSION_1/2/3 */
unsigned int maxpacksize; /* max. packet size */
unsigned int rates; /* rate bitmasks */
unsigned int rate_min, rate_max; /* min/max rates */
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index 26dd5f2..04361d7 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -23,6 +23,7 @@
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
#include <sound/core.h>
#include <sound/info.h>
@@ -50,6 +51,22 @@
return NULL;
}
+static struct uac3_clock_source_descriptor *
+ snd_usb_find_clock_source_v3(struct usb_host_interface *ctrl_iface,
+ int clock_id)
+{
+ struct uac3_clock_source_descriptor *cs = NULL;
+
+ while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
+ ctrl_iface->extralen,
+ cs, UAC3_CLOCK_SOURCE))) {
+ if (cs->bClockID == clock_id)
+ return cs;
+ }
+
+ return NULL;
+}
+
static struct uac_clock_selector_descriptor *
snd_usb_find_clock_selector(struct usb_host_interface *ctrl_iface,
int clock_id)
@@ -66,6 +83,22 @@
return NULL;
}
+static struct uac3_clock_selector_descriptor *
+ snd_usb_find_clock_selector_v3(struct usb_host_interface *ctrl_iface,
+ int clock_id)
+{
+ struct uac3_clock_selector_descriptor *cs = NULL;
+
+ while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
+ ctrl_iface->extralen,
+ cs, UAC3_CLOCK_SELECTOR))) {
+ if (cs->bClockID == clock_id)
+ return cs;
+ }
+
+ return NULL;
+}
+
static struct uac_clock_multiplier_descriptor *
snd_usb_find_clock_multiplier(struct usb_host_interface *ctrl_iface,
int clock_id)
@@ -82,6 +115,22 @@
return NULL;
}
+static struct uac3_clock_multiplier_descriptor *
+ snd_usb_find_clock_multiplier_v3(struct usb_host_interface *ctrl_iface,
+ int clock_id)
+{
+ struct uac3_clock_multiplier_descriptor *cs = NULL;
+
+ while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
+ ctrl_iface->extralen,
+ cs, UAC3_CLOCK_MULTIPLIER))) {
+ if (cs->bClockID == clock_id)
+ return cs;
+ }
+
+ return NULL;
+}
+
static int uac_clock_selector_get_val(struct snd_usb_audio *chip, int selector_id)
{
unsigned char buf;
@@ -135,19 +184,33 @@ static int uac_clock_selector_set_val(struct snd_usb_audio *chip, int selector_i
return ret;
}
-static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
+static bool uac_clock_source_is_valid(struct snd_usb_audio *chip,
+ int protocol,
+ int source_id)
{
int err;
unsigned char data;
struct usb_device *dev = chip->dev;
- struct uac_clock_source_descriptor *cs_desc =
- snd_usb_find_clock_source(chip->ctrl_intf, source_id);
-
- if (!cs_desc)
- return 0;
+ u32 bmControls;
+
+ if (protocol == UAC_VERSION_3) {
+ struct uac3_clock_source_descriptor *cs_desc =
+ snd_usb_find_clock_source_v3(chip->ctrl_intf, source_id);
+
+ if (!cs_desc)
+ return 0;
+ bmControls = le32_to_cpu(cs_desc->bmControls);
+ } else { /* UAC_VERSION_1/2 */
+ struct uac_clock_source_descriptor *cs_desc =
+ snd_usb_find_clock_source(chip->ctrl_intf, source_id);
+
+ if (!cs_desc)
+ return 0;
+ bmControls = cs_desc->bmControls;
+ }
/* If a clock source can't tell us whether it's valid, we assume it is */
- if (!uac2_control_is_readable(cs_desc->bmControls,
+ if (!uac_v2v3_control_is_readable(bmControls,
UAC2_CS_CONTROL_CLOCK_VALID - 1))
return 1;
@@ -167,9 +230,8 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
return !!data;
}
-static int __uac_clock_find_source(struct snd_usb_audio *chip,
- int entity_id, unsigned long *visited,
- bool validate)
+static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id,
+ unsigned long *visited, bool validate)
{
struct uac_clock_source_descriptor *source;
struct uac_clock_selector_descriptor *selector;
@@ -188,7 +250,8 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
if (source) {
entity_id = source->bClockID;
- if (validate && !uac_clock_source_is_valid(chip, entity_id)) {
+ if (validate && !uac_clock_source_is_valid(chip, UAC_VERSION_2,
+ entity_id)) {
usb_audio_err(chip,
"clock source %d is not valid, cannot use\n",
entity_id);
@@ -257,6 +320,97 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
return -EINVAL;
}
+static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
+ unsigned long *visited, bool validate)
+{
+ struct uac3_clock_source_descriptor *source;
+ struct uac3_clock_selector_descriptor *selector;
+ struct uac3_clock_multiplier_descriptor *multiplier;
+
+ entity_id &= 0xff;
+
+ if (test_and_set_bit(entity_id, visited)) {
+ usb_audio_warn(chip,
+ "%s(): recursive clock topology detected, id %d.\n",
+ __func__, entity_id);
+ return -EINVAL;
+ }
+
+ /* first, see if the ID we're looking for is a clock source already */
+ source = snd_usb_find_clock_source_v3(chip->ctrl_intf, entity_id);
+ if (source) {
+ entity_id = source->bClockID;
+ if (validate && !uac_clock_source_is_valid(chip, UAC_VERSION_3,
+ entity_id)) {
+ usb_audio_err(chip,
+ "clock source %d is not valid, cannot use\n",
+ entity_id);
+ return -ENXIO;
+ }
+ return entity_id;
+ }
+
+ selector = snd_usb_find_clock_selector_v3(chip->ctrl_intf, entity_id);
+ if (selector) {
+ int ret, i, cur;
+
+ /* the entity ID we are looking for is a selector.
+ * find out what it currently selects */
+ ret = uac_clock_selector_get_val(chip, selector->bClockID);
+ if (ret < 0)
+ return ret;
+
+ /* Selector values are one-based */
+
+ if (ret > selector->bNrInPins || ret < 1) {
+ usb_audio_err(chip,
+ "%s(): selector reported illegal value, id %d, ret %d\n",
+ __func__, selector->bClockID, ret);
+
+ return -EINVAL;
+ }
+
+ cur = ret;
+ ret = __uac3_clock_find_source(chip, selector->baCSourceID[ret - 1],
+ visited, validate);
+ if (!validate || ret > 0 || !chip->autoclock)
+ return ret;
+
+ /* The current clock source is invalid, try others. */
+ for (i = 1; i <= selector->bNrInPins; i++) {
+ int err;
+
+ if (i == cur)
+ continue;
+
+ ret = __uac3_clock_find_source(chip, selector->baCSourceID[i - 1],
+ visited, true);
+ if (ret < 0)
+ continue;
+
+ err = uac_clock_selector_set_val(chip, entity_id, i);
+ if (err < 0)
+ continue;
+
+ usb_audio_info(chip,
+ "found and selected valid clock source %d\n",
+ ret);
+ return ret;
+ }
+
+ return -ENXIO;
+ }
+
+ /* FIXME: multipliers only act as pass-thru element for now */
+ multiplier = snd_usb_find_clock_multiplier_v3(chip->ctrl_intf,
+ entity_id);
+ if (multiplier)
+ return __uac3_clock_find_source(chip, multiplier->bCSourceID,
+ visited, validate);
+
+ return -EINVAL;
+}
+
/*
* For all kinds of sample rate settings and other device queries,
* the clock source (end-leaf) must be used. However, clock selectors,
@@ -268,12 +422,22 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
*
* Returns the clock source UnitID (>=0) on success, or an error.
*/
-int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id,
- bool validate)
+int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol,
+ int entity_id, bool validate)
{
DECLARE_BITMAP(visited, 256);
memset(visited, 0, sizeof(visited));
- return __uac_clock_find_source(chip, entity_id, visited, validate);
+
+ switch (protocol) {
+ case UAC_VERSION_2:
+ return __uac_clock_find_source(chip, entity_id, visited,
+ validate);
+ case UAC_VERSION_3:
+ return __uac3_clock_find_source(chip, entity_id, visited,
+ validate);
+ default:
+ return -EINVAL;
+ }
}
static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
@@ -332,7 +496,7 @@ static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
return 0;
}
-static int get_sample_rate_v2(struct snd_usb_audio *chip, int iface,
+static int get_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
int altsetting, int clock)
{
struct usb_device *dev = chip->dev;
@@ -345,7 +509,7 @@ static int get_sample_rate_v2(struct snd_usb_audio *chip, int iface,
snd_usb_ctrl_intf(chip) | (clock << 8),
&data, sizeof(data));
if (err < 0) {
- dev_warn(&dev->dev, "%d:%d: cannot get freq (v2): err %d\n",
+ dev_warn(&dev->dev, "%d:%d: cannot get freq (v2/v3): err %d\n",
iface, altsetting, err);
return 0;
}
@@ -353,7 +517,7 @@ static int get_sample_rate_v2(struct snd_usb_audio *chip, int iface,
return le32_to_cpu(data);
}
-static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
+static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt, int rate)
{
@@ -362,18 +526,30 @@ static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
int err, cur_rate, prev_rate;
int clock;
bool writeable;
- struct uac_clock_source_descriptor *cs_desc;
+ u32 bmControls;
- clock = snd_usb_clock_find_source(chip, fmt->clock, true);
+ clock = snd_usb_clock_find_source(chip, fmt->protocol,
+ fmt->clock, true);
if (clock < 0)
return clock;
- prev_rate = get_sample_rate_v2(chip, iface, fmt->altsetting, clock);
+ prev_rate = get_sample_rate_v2v3(chip, iface, fmt->altsetting, clock);
if (prev_rate == rate)
return 0;
- cs_desc = snd_usb_find_clock_source(chip->ctrl_intf, clock);
- writeable = uac2_control_is_writeable(cs_desc->bmControls, UAC2_CS_CONTROL_SAM_FREQ - 1);
+ if (fmt->protocol == UAC_VERSION_3) {
+ struct uac3_clock_source_descriptor *cs_desc;
+
+ cs_desc = snd_usb_find_clock_source_v3(chip->ctrl_intf, clock);
+ bmControls = le32_to_cpu(cs_desc->bmControls);
+ } else {
+ struct uac_clock_source_descriptor *cs_desc;
+
+ cs_desc = snd_usb_find_clock_source(chip->ctrl_intf, clock);
+ bmControls = cs_desc->bmControls;
+ }
+
+ writeable = uac_v2v3_control_is_writeable(bmControls, UAC2_CS_CONTROL_SAM_FREQ - 1);
if (writeable) {
data = cpu_to_le32(rate);
err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
@@ -383,12 +559,13 @@ static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
&data, sizeof(data));
if (err < 0) {
usb_audio_err(chip,
- "%d:%d: cannot set freq %d (v2): err %d\n",
+ "%d:%d: cannot set freq %d (v2/v3): err %d\n",
iface, fmt->altsetting, rate, err);
return err;
}
- cur_rate = get_sample_rate_v2(chip, iface, fmt->altsetting, clock);
+ cur_rate = get_sample_rate_v2v3(chip, iface,
+ fmt->altsetting, clock);
} else {
cur_rate = prev_rate;
}
@@ -427,7 +604,8 @@ int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
return set_sample_rate_v1(chip, iface, alts, fmt, rate);
case UAC_VERSION_2:
- return set_sample_rate_v2(chip, iface, alts, fmt, rate);
+ case UAC_VERSION_3:
+ return set_sample_rate_v2v3(chip, iface, alts, fmt, rate);
}
}
diff --git a/sound/usb/clock.h b/sound/usb/clock.h
index d592e4a..e465ff5 100644
--- a/sound/usb/clock.h
+++ b/sound/usb/clock.h
@@ -5,7 +5,7 @@ int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt, int rate);
-int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id,
- bool validate);
+int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol,
+ int entity_id, bool validate);
#endif /* __USBAUDIO_CLOCK_H */
diff --git a/sound/usb/format.c b/sound/usb/format.c
index 2c44386..6f85892 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -20,6 +20,7 @@
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -39,11 +40,11 @@
* @dev: usb device
* @fp: audioformat record
* @format: the format tag (wFormatTag)
- * @fmt: the format type descriptor
+ * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
*/
static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
struct audioformat *fp,
- unsigned int format, void *_fmt)
+ u64 format, void *_fmt)
{
int sample_width, sample_bytes;
u64 pcm_formats = 0;
@@ -69,6 +70,17 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
format <<= 1;
break;
}
+ case UAC_VERSION_3: {
+ struct uac3_as_header_descriptor *as = _fmt;
+ sample_width = as->bBitResolution;
+ sample_bytes = as->bSubslotSize;
+
+ if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
+ pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
+
+ format <<= 1;
+ break;
+ }
}
if ((pcm_formats == 0) &&
@@ -137,7 +149,7 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
}
if (format & ~0x3f) {
usb_audio_info(chip,
- "%u:%d : unsupported format bits %#x\n",
+ "%u:%d : unsupported format bits %#llx\n",
fp->iface, fp->altsetting, format);
}
@@ -281,15 +293,16 @@ static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
/*
* parse the format descriptor and stores the possible sample rates
- * on the audioformat table (audio class v2).
+ * on the audioformat table (audio class v2 and v3).
*/
-static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
+static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
struct audioformat *fp)
{
struct usb_device *dev = chip->dev;
unsigned char tmp[2], *data;
int nr_triplets, data_size, ret = 0;
- int clock = snd_usb_clock_find_source(chip, fp->clock, false);
+ int clock = snd_usb_clock_find_source(chip, fp->protocol,
+ fp->clock, false);
if (clock < 0) {
dev_err(&dev->dev,
@@ -368,13 +381,30 @@ static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
* parse the format type I and III descriptors
*/
static int parse_audio_format_i(struct snd_usb_audio *chip,
- struct audioformat *fp, unsigned int format,
- struct uac_format_type_i_continuous_descriptor *fmt)
+ struct audioformat *fp, u64 format,
+ void *_fmt)
{
snd_pcm_format_t pcm_format;
+ unsigned int fmt_type;
int ret;
- if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
+ switch (fp->protocol) {
+ default:
+ case UAC_VERSION_1:
+ case UAC_VERSION_2: {
+ struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
+
+ fmt_type = fmt->bFormatType;
+ break;
+ }
+ case UAC_VERSION_3: {
+ /* fp->fmt_type is already set in this case */
+ fmt_type = fp->fmt_type;
+ break;
+ }
+ }
+
+ if (fmt_type == UAC_FORMAT_TYPE_III) {
/* FIXME: the format type is really IECxxx
* but we give normal PCM format to get the existing
* apps working...
@@ -393,7 +423,7 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
}
fp->formats = pcm_format_to_bits(pcm_format);
} else {
- fp->formats = parse_audio_format_i_type(chip, fp, format, fmt);
+ fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
if (!fp->formats)
return -EINVAL;
}
@@ -405,15 +435,20 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
*/
switch (fp->protocol) {
default:
- case UAC_VERSION_1:
+ case UAC_VERSION_1: {
+ struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
+
fp->channels = fmt->bNrChannels;
ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
break;
+ }
case UAC_VERSION_2:
+ case UAC_VERSION_3: {
/* fp->channels is already set in this case */
- ret = parse_audio_format_rates_v2(chip, fp);
+ ret = parse_audio_format_rates_v2v3(chip, fp);
break;
}
+ }
if (fp->channels < 1) {
usb_audio_err(chip,
@@ -430,7 +465,7 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
*/
static int parse_audio_format_ii(struct snd_usb_audio *chip,
struct audioformat *fp,
- int format, void *_fmt)
+ u64 format, void *_fmt)
{
int brate, framesize, ret;
@@ -445,7 +480,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
break;
default:
usb_audio_info(chip,
- "%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
+ "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
fp->iface, fp->altsetting, format);
fp->formats = SNDRV_PCM_FMTBIT_MPEG;
break;
@@ -470,7 +505,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
framesize = le16_to_cpu(fmt->wSamplesPerFrame);
usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
fp->frame_size = framesize;
- ret = parse_audio_format_rates_v2(chip, fp);
+ ret = parse_audio_format_rates_v2v3(chip, fp);
break;
}
}
@@ -479,7 +514,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
}
int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
- struct audioformat *fp, unsigned int format,
+ struct audioformat *fp, u64 format,
struct uac_format_type_i_continuous_descriptor *fmt,
int stream)
{
@@ -520,3 +555,23 @@ int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
return 0;
}
+int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
+ struct audioformat *fp,
+ struct uac3_as_header_descriptor *as,
+ int stream)
+{
+ u64 format = le64_to_cpu(as->bmFormats);
+ int err;
+
+ /* Type I format bits are D0..D6 */
+ if (format & 0x7f)
+ fp->fmt_type = UAC_FORMAT_TYPE_I;
+ else
+ fp->fmt_type = UAC_FORMAT_TYPE_III;
+
+ err = parse_audio_format_i(chip, fp, format, as);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
diff --git a/sound/usb/format.h b/sound/usb/format.h
index 4b8a011..46c9de7 100644
--- a/sound/usb/format.h
+++ b/sound/usb/format.h
@@ -2,8 +2,12 @@
#define __USBAUDIO_FORMAT_H
int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
- struct audioformat *fp, unsigned int format,
+ struct audioformat *fp, u64 format,
struct uac_format_type_i_continuous_descriptor *fmt,
int stream);
+int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
+ struct audioformat *fp,
+ struct uac3_as_header_descriptor *as,
+ int stream);
#endif /* __USBAUDIO_FORMAT_H */
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 9732edf..5b5dfe4 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -51,6 +51,7 @@
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
#include <sound/core.h>
#include <sound/control.h>
@@ -189,7 +190,7 @@ static void *find_audio_control_unit(struct mixer_build *state,
USB_DT_CS_INTERFACE)) != NULL) {
if (hdr->bLength >= 4 &&
hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
- hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
+ hdr->bDescriptorSubtype <= UAC3_SAMPLE_RATE_CONVERTER &&
hdr->bUnitID == unit)
return hdr;
}
@@ -460,9 +461,10 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
validx += cval->idx_off;
+
if (cval->head.mixer->protocol == UAC_VERSION_1) {
val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
- } else { /* UAC_VERSION_2 */
+ } else { /* UAC_VERSION_2/3 */
val_len = uac2_ctl_value_size(cval->val_type);
/* FIXME */
@@ -711,6 +713,7 @@ static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm
static int check_input_term(struct mixer_build *state, int id,
struct usb_audio_term *term)
{
+ int protocol = state->mixer->protocol;
int err;
void *p1;
@@ -718,16 +721,104 @@ static int check_input_term(struct mixer_build *state, int id,
while ((p1 = find_audio_control_unit(state, id)) != NULL) {
unsigned char *hdr = p1;
term->id = id;
- switch (hdr[2]) {
- case UAC_INPUT_TERMINAL:
- if (state->mixer->protocol == UAC_VERSION_1) {
- struct uac_input_terminal_descriptor *d = p1;
- term->type = le16_to_cpu(d->wTerminalType);
- term->channels = d->bNrChannels;
- term->chconfig = le16_to_cpu(d->wChannelConfig);
- term->name = d->iTerminal;
- } else { /* UAC_VERSION_2 */
- struct uac2_input_terminal_descriptor *d = p1;
+
+ if ((protocol == UAC_VERSION_1) || (protocol == UAC_VERSION_2)) {
+ switch (hdr[2]) {
+ case UAC_INPUT_TERMINAL:
+ if (protocol == UAC_VERSION_1) {
+ struct uac_input_terminal_descriptor *d = p1;
+
+ term->type = le16_to_cpu(d->wTerminalType);
+ term->channels = d->bNrChannels;
+ term->chconfig = le16_to_cpu(d->wChannelConfig);
+ term->name = d->iTerminal;
+ } else { /* UAC_VERSION_2 */
+ struct uac2_input_terminal_descriptor *d = p1;
+
+ /* call recursively to verify that the
+ * referenced clock entity is valid */
+ err = check_input_term(state, d->bCSourceID, term);
+ if (err < 0)
+ return err;
+
+ /* save input term properties after recursion,
+ * to ensure they are not overriden by the
+ * recursion calls */
+ term->id = id;
+ term->type = le16_to_cpu(d->wTerminalType);
+ term->channels = d->bNrChannels;
+ term->chconfig = le32_to_cpu(d->bmChannelConfig);
+ term->name = d->iTerminal;
+ }
+ return 0;
+ case UAC_FEATURE_UNIT: {
+ /* the header is the same for v1 and v2 */
+ struct uac_feature_unit_descriptor *d = p1;
+
+ id = d->bSourceID;
+ break; /* continue to parse */
+ }
+ case UAC_MIXER_UNIT: {
+ struct uac_mixer_unit_descriptor *d = p1;
+
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->channels = uac_mixer_unit_bNrChannels(d);
+ term->chconfig = uac_mixer_unit_wChannelConfig(d, protocol);
+ term->name = uac_mixer_unit_iMixer(d);
+ return 0;
+ }
+ case UAC_SELECTOR_UNIT:
+ case UAC2_CLOCK_SELECTOR: {
+ struct uac_selector_unit_descriptor *d = p1;
+ /* call recursively to retrieve the channel info */
+ err = check_input_term(state, d->baSourceID[0], term);
+ if (err < 0)
+ return err;
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->id = id;
+ term->name = uac_selector_unit_iSelector(d);
+ return 0;
+ }
+ case UAC1_PROCESSING_UNIT:
+ case UAC1_EXTENSION_UNIT:
+ /* UAC2_PROCESSING_UNIT_V2 */
+ /* UAC2_EFFECT_UNIT */
+ case UAC2_EXTENSION_UNIT_V2: {
+ struct uac_processing_unit_descriptor *d = p1;
+
+ if (protocol == UAC_VERSION_2 &&
+ hdr[2] == UAC2_EFFECT_UNIT) {
+ /* UAC2/UAC1 unit IDs overlap here in an
+ * uncompatible way. Ignore this unit for now.
+ */
+ return 0;
+ }
+
+ if (d->bNrInPins) {
+ id = d->baSourceID[0];
+ break; /* continue to parse */
+ }
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->channels = uac_processing_unit_bNrChannels(d);
+ term->chconfig = uac_processing_unit_wChannelConfig(d, protocol);
+ term->name = uac_processing_unit_iProcessing(d, protocol);
+ return 0;
+ }
+ case UAC2_CLOCK_SOURCE: {
+ struct uac_clock_source_descriptor *d = p1;
+
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->id = id;
+ term->name = d->iClockSource;
+ return 0;
+ }
+ default:
+ return -ENODEV;
+ }
+ } else { /* UAC_VERSION_3 */
+ switch (hdr[2]) {
+ case UAC_INPUT_TERMINAL: {
+ struct uac3_input_terminal_descriptor *d = p1;
/* call recursively to verify that the
* referenced clock entity is valid */
@@ -740,71 +831,31 @@ static int check_input_term(struct mixer_build *state, int id,
* recursion calls */
term->id = id;
term->type = le16_to_cpu(d->wTerminalType);
- term->channels = d->bNrChannels;
- term->chconfig = le32_to_cpu(d->bmChannelConfig);
- term->name = d->iTerminal;
- }
- return 0;
- case UAC_FEATURE_UNIT: {
- /* the header is the same for v1 and v2 */
- struct uac_feature_unit_descriptor *d = p1;
- id = d->bSourceID;
- break; /* continue to parse */
- }
- case UAC_MIXER_UNIT: {
- struct uac_mixer_unit_descriptor *d = p1;
- term->type = d->bDescriptorSubtype << 16; /* virtual type */
- term->channels = uac_mixer_unit_bNrChannels(d);
- term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
- term->name = uac_mixer_unit_iMixer(d);
- return 0;
- }
- case UAC_SELECTOR_UNIT:
- case UAC2_CLOCK_SELECTOR: {
- struct uac_selector_unit_descriptor *d = p1;
- /* call recursively to retrieve the channel info */
- err = check_input_term(state, d->baSourceID[0], term);
- if (err < 0)
- return err;
- term->type = d->bDescriptorSubtype << 16; /* virtual type */
- term->id = id;
- term->name = uac_selector_unit_iSelector(d);
- return 0;
- }
- case UAC1_PROCESSING_UNIT:
- case UAC1_EXTENSION_UNIT:
- /* UAC2_PROCESSING_UNIT_V2 */
- /* UAC2_EFFECT_UNIT */
- case UAC2_EXTENSION_UNIT_V2: {
- struct uac_processing_unit_descriptor *d = p1;
-
- if (state->mixer->protocol == UAC_VERSION_2 &&
- hdr[2] == UAC2_EFFECT_UNIT) {
- /* UAC2/UAC1 unit IDs overlap here in an
- * uncompatible way. Ignore this unit for now.
- */
+
+ /* REVISIT: UAC3 IT doesn't have channels/cfg */
+ term->channels = 0;
+ term->chconfig = 0;
+
+ term->name = le16_to_cpu(d->wTerminalDescrStr);
return 0;
}
+ case UAC3_FEATURE_UNIT: {
+ struct uac3_feature_unit_descriptor *d = p1;
- if (d->bNrInPins) {
- id = d->baSourceID[0];
+ id = d->bSourceID;
break; /* continue to parse */
}
- term->type = d->bDescriptorSubtype << 16; /* virtual type */
- term->channels = uac_processing_unit_bNrChannels(d);
- term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
- term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
- return 0;
- }
- case UAC2_CLOCK_SOURCE: {
- struct uac_clock_source_descriptor *d = p1;
- term->type = d->bDescriptorSubtype << 16; /* virtual type */
- term->id = id;
- term->name = d->iClockSource;
- return 0;
- }
- default:
- return -ENODEV;
+ case UAC3_CLOCK_SOURCE: {
+ struct uac3_clock_source_descriptor *d = p1;
+
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->id = id;
+ term->name = le16_to_cpu(d->wClockSourceStr);
+ return 0;
+ }
+ default:
+ return -ENODEV;
+ }
}
}
return -ENODEV;
@@ -1411,7 +1462,7 @@ static int parse_clock_source_unit(struct mixer_build *state, int unitid,
* The only property of this unit we are interested in is the
* clock source validity. If that isn't readable, just bail out.
*/
- if (!uac2_control_is_readable(hdr->bmControls,
+ if (!uac_v2v3_control_is_readable(hdr->bmControls,
ilog2(UAC2_CS_CONTROL_CLOCK_VALID)))
return 0;
@@ -1427,7 +1478,7 @@ static int parse_clock_source_unit(struct mixer_build *state, int unitid,
cval->val_type = USB_MIXER_BOOLEAN;
cval->control = UAC2_CS_CONTROL_CLOCK_VALID;
- if (uac2_control_is_writeable(hdr->bmControls,
+ if (uac_v2v3_control_is_writeable(hdr->bmControls,
ilog2(UAC2_CS_CONTROL_CLOCK_VALID)))
kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
else {
@@ -1484,8 +1535,9 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
unitid);
return -EINVAL;
}
- } else {
+ } else if (state->mixer->protocol == UAC_VERSION_2) {
struct uac2_feature_unit_descriptor *ftr = _ftr;
+
csize = 4;
channels = (hdr->bLength - 6) / 4 - 1;
bmaControls = ftr->bmaControls;
@@ -1495,6 +1547,18 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
unitid);
return -EINVAL;
}
+ } else { /* UAC_VERSION_3 */
+ struct uac3_feature_unit_descriptor *ftr = _ftr;
+
+ csize = 4;
+ channels = (ftr->bLength - 7) / 4 - 1;
+ bmaControls = ftr->bmaControls;
+ if (hdr->bLength < 6 + csize) {
+ usb_audio_err(state->chip,
+ "unit %u: invalid UAC3_FEATURE_UNIT descriptor\n",
+ unitid);
+ return -EINVAL;
+ }
}
/* parse the source unit */
@@ -1553,7 +1617,7 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
build_feature_ctl(state, _ftr, 0, i, &iterm,
unitid, 0);
}
- } else { /* UAC_VERSION_2 */
+ } else { /* UAC_VERSION_2/3 */
for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
unsigned int ch_bits = 0;
unsigned int ch_read_only = 0;
@@ -1563,9 +1627,9 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
mask = snd_usb_combine_bytes(bmaControls +
csize * (j+1), csize);
- if (uac2_control_is_readable(mask, i)) {
+ if (uac_v2v3_control_is_readable(mask, i)) {
ch_bits |= (1 << j);
- if (!uac2_control_is_writeable(mask, i))
+ if (!uac_v2v3_control_is_writeable(mask, i))
ch_read_only |= (1 << j);
}
}
@@ -1586,9 +1650,9 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
if (ch_bits & 1)
build_feature_ctl(state, _ftr, ch_bits, i,
&iterm, unitid, ch_read_only);
- if (uac2_control_is_readable(master_bits, i))
+ if (uac_v2v3_control_is_readable(master_bits, i))
build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
- !uac2_control_is_writeable(master_bits, i));
+ !uac_v2v3_control_is_writeable(master_bits, i));
}
}
@@ -2189,6 +2253,7 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
static int parse_audio_unit(struct mixer_build *state, int unitid)
{
unsigned char *p1;
+ int protocol = state->mixer->protocol;
if (test_and_set_bit(unitid, state->unitbitmap))
return 0; /* the unit already visited */
@@ -2199,36 +2264,61 @@ static int parse_audio_unit(struct mixer_build *state, int unitid)
return -EINVAL;
}
- switch (p1[2]) {
- case UAC_INPUT_TERMINAL:
- return 0; /* NOP */
- case UAC_MIXER_UNIT:
- return parse_audio_mixer_unit(state, unitid, p1);
- case UAC2_CLOCK_SOURCE:
- return parse_clock_source_unit(state, unitid, p1);
- case UAC_SELECTOR_UNIT:
- case UAC2_CLOCK_SELECTOR:
- return parse_audio_selector_unit(state, unitid, p1);
- case UAC_FEATURE_UNIT:
- return parse_audio_feature_unit(state, unitid, p1);
- case UAC1_PROCESSING_UNIT:
- /* UAC2_EFFECT_UNIT has the same value */
- if (state->mixer->protocol == UAC_VERSION_1)
- return parse_audio_processing_unit(state, unitid, p1);
- else
- return 0; /* FIXME - effect units not implemented yet */
- case UAC1_EXTENSION_UNIT:
- /* UAC2_PROCESSING_UNIT_V2 has the same value */
- if (state->mixer->protocol == UAC_VERSION_1)
+ if ((protocol == UAC_VERSION_1) || (protocol == UAC_VERSION_2)) {
+ switch (p1[2]) {
+ case UAC_INPUT_TERMINAL:
+ return 0; /* NOP */
+ case UAC_MIXER_UNIT:
+ return parse_audio_mixer_unit(state, unitid, p1);
+ case UAC2_CLOCK_SOURCE:
+ return parse_clock_source_unit(state, unitid, p1);
+ case UAC_SELECTOR_UNIT:
+ case UAC2_CLOCK_SELECTOR:
+ return parse_audio_selector_unit(state, unitid, p1);
+ case UAC_FEATURE_UNIT:
+ return parse_audio_feature_unit(state, unitid, p1);
+ case UAC1_PROCESSING_UNIT:
+ /* UAC2_EFFECT_UNIT has the same value */
+ if (protocol == UAC_VERSION_1)
+ return parse_audio_processing_unit(state, unitid, p1);
+ else
+ return 0; /* FIXME - effect units not implemented yet */
+ case UAC1_EXTENSION_UNIT:
+ /* UAC2_PROCESSING_UNIT_V2 has the same value */
+ if (protocol == UAC_VERSION_1)
+ return parse_audio_extension_unit(state, unitid, p1);
+ else /* UAC_VERSION_2 */
+ return parse_audio_processing_unit(state, unitid, p1);
+ case UAC2_EXTENSION_UNIT_V2:
return parse_audio_extension_unit(state, unitid, p1);
- else /* UAC_VERSION_2 */
+ default:
+ usb_audio_err(state->chip,
+ "unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
+ return -EINVAL;
+ }
+ } else { /* UAC_VERSION_3 */
+ switch (p1[2]) {
+ case UAC_INPUT_TERMINAL:
+ return 0; /* NOP */
+ case UAC3_MIXER_UNIT:
+ return parse_audio_mixer_unit(state, unitid, p1);
+ case UAC3_CLOCK_SOURCE:
+ return parse_clock_source_unit(state, unitid, p1);
+ case UAC3_CLOCK_SELECTOR:
+ return parse_audio_selector_unit(state, unitid, p1);
+ case UAC3_FEATURE_UNIT:
+ return parse_audio_feature_unit(state, unitid, p1);
+ case UAC3_EFFECT_UNIT:
+ return 0; /* FIXME - effect units not implemented yet */
+ case UAC3_PROCESSING_UNIT:
return parse_audio_processing_unit(state, unitid, p1);
- case UAC2_EXTENSION_UNIT_V2:
- return parse_audio_extension_unit(state, unitid, p1);
- default:
- usb_audio_err(state->chip,
- "unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
- return -EINVAL;
+ case UAC3_EXTENSION_UNIT:
+ return parse_audio_extension_unit(state, unitid, p1);
+ default:
+ usb_audio_err(state->chip,
+ "unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
+ return -EINVAL;
+ }
}
}
@@ -2296,7 +2386,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
err = parse_audio_unit(&state, desc->bSourceID);
if (err < 0 && err != -EINVAL)
return err;
- } else { /* UAC_VERSION_2 */
+ } else if (mixer->protocol == UAC_VERSION_2) {
struct uac2_output_terminal_descriptor *desc = p;
if (desc->bLength < sizeof(*desc))
@@ -2317,6 +2407,27 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
err = parse_audio_unit(&state, desc->bCSourceID);
if (err < 0 && err != -EINVAL)
return err;
+ } else { /* UAC_VERSION_3 */
+ struct uac3_output_terminal_descriptor *desc = p;
+
+ if (desc->bLength < sizeof(*desc))
+ continue; /* invalid descriptor? */
+ /* mark terminal ID as visited */
+ set_bit(desc->bTerminalID, state.unitbitmap);
+ state.oterm.id = desc->bTerminalID;
+ state.oterm.type = le16_to_cpu(desc->wTerminalType);
+ state.oterm.name = le16_to_cpu(desc->wTerminalDescrStr);
+ err = parse_audio_unit(&state, desc->bSourceID);
+ if (err < 0 && err != -EINVAL)
+ return err;
+
+ /*
+ * For UAC3, use the same approach to also add the
+ * clock selectors
+ */
+ err = parse_audio_unit(&state, desc->bCSourceID);
+ if (err < 0 && err != -EINVAL)
+ return err;
}
}
@@ -2558,6 +2669,9 @@ int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
case UAC_VERSION_2:
mixer->protocol = UAC_VERSION_2;
break;
+ case UAC_VERSION_3:
+ mixer->protocol = UAC_VERSION_3;
+ break;
}
if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index d1776e5..738ee87 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -20,6 +20,7 @@
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -311,6 +312,86 @@ static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
return chmap;
}
+/* UAC3 device stores channels information in Cluster Descriptors */
+static struct
+snd_pcm_chmap_elem *convert_chmap_v3(struct uac3_cluster_header_descriptor
+ *cluster)
+{
+ unsigned int channels = cluster->bNrChannels;
+ struct snd_pcm_chmap_elem *chmap;
+ void *p = cluster;
+ int len, c;
+
+ if (channels > ARRAY_SIZE(chmap->map))
+ return NULL;
+
+ chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
+ if (!chmap)
+ return NULL;
+
+ len = le16_to_cpu(cluster->wLength);
+ c = 0;
+ p += sizeof(struct uac3_cluster_header_descriptor);
+
+ while (((p - (void *)cluster) < len) && (c < channels)) {
+ struct uac3_cluster_segment_descriptor *cs_desc = p;
+ u16 cs_len;
+ u8 cs_type;
+
+ cs_len = le16_to_cpu(cs_desc->wLength);
+ cs_type = cs_desc->bSegmentType;
+
+ if (cs_type == UAC3_CHANNEL_INFORMATION) {
+ struct uac3_cluster_information_segment_descriptor *is = p;
+ unsigned char map;
+
+ /*
+ * FIXME: this conversion is simplified, because
+ * asound.h doesn't have UAC3 values yet
+ */
+ switch (is->bChPurpose) {
+ case UAC3_CH_MONO:
+ map = SNDRV_CHMAP_MONO;
+ break;
+ case UAC3_CH_LEFT:
+ case UAC3_CH_FRONT_LEFT:
+ case UAC3_CH_SURROUND_ARRAY_LEFT:
+ map = SNDRV_CHMAP_FL;
+ break;
+ case UAC3_CH_RIGHT:
+ case UAC3_CH_FRONT_RIGHT:
+ case UAC3_CH_SURROUND_ARRAY_RIGHT:
+ map = SNDRV_CHMAP_FR;
+ break;
+ case UAC3_CH_FRONT_CENTER:
+ map = SNDRV_CHMAP_FC;
+ break;
+ case UAC3_CH_LOW_FREQUENCY_EFFECTS:
+ map = SNDRV_CHMAP_LFE;
+ break;
+ case UAC3_CH_RELATIONSHIP_UNDEFINED:
+ default:
+ map = SNDRV_CHMAP_UNKNOWN;
+ break;
+ }
+
+ chmap->map[c++] = map;
+ }
+ p += cs_len;
+
+ }
+
+ if (channels < c)
+ pr_err("%s: channel number mismatch\n", __func__);
+
+ chmap->channels = channels;
+
+ for (; c < channels; c++)
+ chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
+
+ return chmap;
+}
+
/*
* add this endpoint to the chip instance.
* if a stream with the same endpoint already exists, append to it.
@@ -461,10 +542,11 @@ static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
return NULL;
}
-static struct uac2_output_terminal_descriptor *
- snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
- int terminal_id)
+static void *
+snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
+ int terminal_id)
{
+ /* OK to use with both UAC2 and UAC3 */
struct uac2_output_terminal_descriptor *term = NULL;
while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
@@ -484,10 +566,12 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
struct usb_host_interface *alts;
struct usb_interface_descriptor *altsd;
int i, altno, err, stream;
- unsigned int format = 0, num_channels = 0;
+ u64 format = 0;
+ unsigned int num_channels = 0;
struct audioformat *fp = NULL;
int num, protocol, clock = 0;
struct uac_format_type_i_continuous_descriptor *fmt;
+ struct snd_pcm_chmap_elem *chmap_v3 = NULL;
unsigned int chconfig;
dev = chip->dev;
@@ -624,38 +708,158 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
iface_no, altno, as->bTerminalLink);
continue;
}
- }
- /* get format type */
- fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
- if (!fmt) {
+ case UAC_VERSION_3: {
+ struct uac3_input_terminal_descriptor *input_term;
+ struct uac3_output_terminal_descriptor *output_term;
+ struct uac3_as_header_descriptor *as;
+ struct uac3_cluster_header_descriptor *cluster;
+ struct uac3_hc_descriptor_header hc_header;
+ u16 cluster_id, wLength;
+
+ as = snd_usb_find_csint_desc(alts->extra,
+ alts->extralen,
+ NULL, UAC_AS_GENERAL);
+
+ if (!as) {
+ dev_err(&dev->dev,
+ "%u:%d : UAC_AS_GENERAL descriptor not found\n",
+ iface_no, altno);
+ continue;
+ }
+
+ if (as->bLength < sizeof(*as)) {
+ dev_err(&dev->dev,
+ "%u:%d : invalid UAC_AS_GENERAL desc\n",
+ iface_no, altno);
+ continue;
+ }
+
+ cluster_id = le16_to_cpu(as->wClusterDescrID);
+ if (!cluster_id) {
+ dev_err(&dev->dev,
+ "%u:%d : no cluster descriptor\n",
+ iface_no, altno);
+ continue;
+ }
+
+ /*
+ * Get number of channels and channel map through
+ * High Capability Cluster Descriptor
+ *
+ * First step: get High Capability header and
+ * read size of Cluster Descriptor
+ */
+ err = snd_usb_ctl_msg(chip->dev,
+ usb_rcvctrlpipe(chip->dev, 0),
+ UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
+ USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ cluster_id,
+ snd_usb_ctrl_intf(chip),
+ &hc_header, sizeof(hc_header));
+ if (err < 0)
+ return err;
+ else if (err != sizeof(hc_header)) {
+ dev_err(&dev->dev,
+ "%u:%d : can't get High Capability descriptor\n",
+ iface_no, altno);
+ return -EIO;
+ }
+
+ /*
+ * Second step: allocate needed amount of memory
+ * and request Cluster Descriptor
+ */
+ wLength = le16_to_cpu(hc_header.wLength);
+ cluster = kzalloc(wLength, GFP_KERNEL);
+ if (!cluster)
+ return -ENOMEM;
+ err = snd_usb_ctl_msg(chip->dev,
+ usb_rcvctrlpipe(chip->dev, 0),
+ UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
+ USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ cluster_id,
+ snd_usb_ctrl_intf(chip),
+ cluster, wLength);
+ if (err < 0) {
+ kfree(cluster);
+ return err;
+ } else if (err != wLength) {
+ dev_err(&dev->dev,
+ "%u:%d : can't get Cluster Descriptor\n",
+ iface_no, altno);
+ kfree(cluster);
+ return -EIO;
+ }
+
+ num_channels = cluster->bNrChannels;
+ chmap_v3 = convert_chmap_v3(cluster);
+
+ kfree(cluster);
+
+ format = le64_to_cpu(as->bmFormats);
+
+ /* lookup the terminal associated to this interface
+ * to extract the clock */
+ input_term = snd_usb_find_input_terminal_descriptor(
+ chip->ctrl_intf,
+ as->bTerminalLink);
+
+ if (input_term) {
+ clock = input_term->bCSourceID;
+ break;
+ }
+
+ output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
+ as->bTerminalLink);
+ if (output_term) {
+ clock = output_term->bCSourceID;
+ break;
+ }
+
dev_err(&dev->dev,
- "%u:%d : no UAC_FORMAT_TYPE desc\n",
- iface_no, altno);
+ "%u:%d : bogus bTerminalLink %d\n",
+ iface_no, altno, as->bTerminalLink);
continue;
}
- if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
- ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) {
- dev_err(&dev->dev,
- "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
- iface_no, altno);
- continue;
}
- /*
- * Blue Microphones workaround: The last altsetting is identical
- * with the previous one, except for a larger packet size, but
- * is actually a mislabeled two-channel setting; ignore it.
- */
- if (fmt->bNrChannels == 1 &&
- fmt->bSubframeSize == 2 &&
- altno == 2 && num == 3 &&
- fp && fp->altsetting == 1 && fp->channels == 1 &&
- fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
- protocol == UAC_VERSION_1 &&
- le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
+ if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) {
+ /* get format type */
+ fmt = snd_usb_find_csint_desc(alts->extra,
+ alts->extralen,
+ NULL, UAC_FORMAT_TYPE);
+ if (!fmt) {
+ dev_err(&dev->dev,
+ "%u:%d : no UAC_FORMAT_TYPE desc\n",
+ iface_no, altno);
+ continue;
+ }
+ if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8))
+ || ((protocol == UAC_VERSION_2) &&
+ (fmt->bLength < 6))) {
+ dev_err(&dev->dev,
+ "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
+ iface_no, altno);
+ continue;
+ }
+
+ /*
+ * Blue Microphones workaround: The last altsetting is
+ * identical with the previous one, except for a larger
+ * packet size, but is actually a mislabeled two-channel
+ * setting; ignore it.
+ */
+ if (fmt->bNrChannels == 1 &&
+ fmt->bSubframeSize == 2 &&
+ altno == 2 && num == 3 &&
+ fp && fp->altsetting == 1 && fp->channels == 1 &&
+ fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
+ protocol == UAC_VERSION_1 &&
+ le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
fp->maxpacksize * 2)
- continue;
+ continue;
+ }
fp = kzalloc(sizeof(*fp), GFP_KERNEL);
if (!fp)
@@ -709,17 +913,39 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
}
/* ok, let's parse further... */
- if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream) < 0) {
- kfree(fp->rate_table);
- kfree(fp);
- fp = NULL;
- continue;
+ if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) {
+ if (snd_usb_parse_audio_format(chip, fp, format,
+ fmt, stream) < 0) {
+ kfree(fp->rate_table);
+ kfree(fp);
+ fp = NULL;
+ continue;
+ }
+ } else {
+ struct uac3_as_header_descriptor *as;
+
+ as = snd_usb_find_csint_desc(alts->extra,
+ alts->extralen,
+ NULL, UAC_AS_GENERAL);
+
+ if (snd_usb_parse_audio_format_v3(chip, fp, as,
+ stream) < 0) {
+ kfree(fp->rate_table);
+ kfree(fp);
+ fp = NULL;
+ continue;
+ }
}
/* Create chmap */
if (fp->channels != num_channels)
chconfig = 0;
- fp->chmap = convert_chmap(fp->channels, chconfig, protocol);
+
+ if (protocol == UAC_VERSION_3)
+ fp->chmap = chmap_v3;
+ else
+ fp->chmap = convert_chmap(fp->channels, chconfig,
+ protocol);
dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint);
err = snd_usb_add_audio_stream(chip, stream, fp);
--
1.9.1
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-07 2:01 ` [PATCH 1/1] ALSA: usb: initial " Ruslan Bilovol
@ 2017-11-08 14:38 ` Takashi Iwai
2017-11-08 16:46 ` kbuild test robot
2017-11-08 19:38 ` [alsa-devel] " Pierre-Louis Bossart
2 siblings, 0 replies; 18+ messages in thread
From: Takashi Iwai @ 2017-11-08 14:38 UTC (permalink / raw)
To: Ruslan Bilovol; +Cc: alsa-devel, Greg Kroah-Hartman, linux-kernel
On Tue, 07 Nov 2017 03:01:20 +0100,
Ruslan Bilovol wrote:
>
> Recently released USB Audio Class 3.0 specification
> introduces many significant changes comparing to
> previous versions, like
> - new Power Domains, support for LPM/L1
> - new Cluster descriptor
> - changed layout of all class-specific descriptors
> - new High Capability descriptors
> - New class-specific String descriptors
> - new and removed units
> - additional sources for interrupts
> - removed Type II Audio Data Formats
> - ... and many other things (check spec)
>
> It also provides backward compatibility through
> multiple configurations, as well as requires
> mandatory support for BADD (Basic Audio Device
> Definition) on each ADC3.0 compliant device
>
> This patch adds initial support of UAC3 specification
> that is enough for Generic I/O Profile (BAOF, BAIF)
> device support from BADD document.
>
> Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
The patch looks good, but the timing is fairly late for merging to
4.15.
So from my side, the primary question is whether the changes in USB
(audio) header files are OK for USB guys.
Greg, could you check these changes and give an ack if it's OK to
merge? Or if you prefer postpone, just let me know.
Below are some nitpicking:
> --- a/include/linux/usb/audio-v2.h
> +++ b/include/linux/usb/audio-v2.h
> @@ -33,12 +33,12 @@
> *
> */
>
> -static inline bool uac2_control_is_readable(u32 bmControls, u8 control)
> +static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control)
> {
> return (bmControls >> (control * 2)) & 0x1;
> }
>
> -static inline bool uac2_control_is_writeable(u32 bmControls, u8 control)
> +static inline bool uac_v2v3_control_is_writeable(u32 bmControls, u8 control)
> {
> return (bmControls >> (control * 2)) & 0x2;
> }
This change looks a bit strange, but later one I noticed the reason
you didn't copy these functions into usb/audio-v3.h. Though, I guess
a compiler can optimize out even if you call the same inline code
twice for v2 and v3...
In anyway, if we do rename, let's mention about it in the comment.
> diff --git a/include/linux/usb/audio-v3.h b/include/linux/usb/audio-v3.h
> new file mode 100644
> index 0000000..cbbe51e
> --- /dev/null
> +++ b/include/linux/usb/audio-v3.h
> @@ -0,0 +1,343 @@
> +// SPDX-License-Identifier: GPL-2.0+
You can use the C-style comment for SPDX line,
/* SPDX-License-Identifier: GPL-2.0+ */
> +static struct uac3_clock_source_descriptor *
> + snd_usb_find_clock_source_v3(struct usb_host_interface *ctrl_iface,
> + int clock_id)
> +{
> + struct uac3_clock_source_descriptor *cs = NULL;
> +
> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
> + ctrl_iface->extralen,
> + cs, UAC3_CLOCK_SOURCE))) {
> + if (cs->bClockID == clock_id)
> + return cs;
> + }
> +
> + return NULL;
> +}
We may clean up the whole find_clock_xxx stuff later, but let's keep
it dumb and straight for now...
> +static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
> + unsigned long *visited, bool validate)
> +{
(snip)
> + /* the entity ID we are looking for is a selector.
> + * find out what it currently selects */
The multi-line comment should be properly formatted like
/*
* XXX
*/
> + /* The current clock source is invalid, try others. */
> + for (i = 1; i <= selector->bNrInPins; i++) {
> + int err;
> +
> + if (i == cur)
> + continue;
> +
> + ret = __uac3_clock_find_source(chip, selector->baCSourceID[i - 1],
> + visited, true);
> + if (ret < 0)
> + continue;
> +
> + err = uac_clock_selector_set_val(chip, entity_id, i);
> + if (err < 0)
> + continue;
> +
> + usb_audio_info(chip,
> + "found and selected valid clock source %d\n",
> + ret);
Do we need to print this at each time?
> static int parse_audio_format_i(struct snd_usb_audio *chip,
> - struct audioformat *fp, unsigned int format,
> - struct uac_format_type_i_continuous_descriptor *fmt)
> + struct audioformat *fp, u64 format,
> + void *_fmt)
> {
> snd_pcm_format_t pcm_format;
> + unsigned int fmt_type;
> int ret;
>
> - if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
> + switch (fp->protocol) {
> + default:
> + case UAC_VERSION_1:
> + case UAC_VERSION_2: {
> + struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
> +
> + fmt_type = fmt->bFormatType;
> + break;
> + }
> + case UAC_VERSION_3: {
> + /* fp->fmt_type is already set in this case */
> + fmt_type = fp->fmt_type;
> + break;
> + }
> + }
The double-braces don't look beautiful. And in this case it's just
for the temporary fmt variable, so it can be moved to the top level
and drop the internal whole braces.
> @@ -405,15 +435,20 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
> */
> switch (fp->protocol) {
> default:
> - case UAC_VERSION_1:
> + case UAC_VERSION_1: {
> + struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
> +
> fp->channels = fmt->bNrChannels;
> ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
> break;
> + }
> case UAC_VERSION_2:
> + case UAC_VERSION_3: {
> /* fp->channels is already set in this case */
> - ret = parse_audio_format_rates_v2(chip, fp);
> + ret = parse_audio_format_rates_v2v3(chip, fp);
> break;
> }
> + }
DItto.
> @@ -520,3 +555,23 @@ int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
> return 0;
> }
>
> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
> + struct audioformat *fp,
> + struct uac3_as_header_descriptor *as,
> + int stream)
> +{
> + u64 format = le64_to_cpu(as->bmFormats);
> + int err;
> +
> + /* Type I format bits are D0..D6 */
> + if (format & 0x7f)
> + fp->fmt_type = UAC_FORMAT_TYPE_I;
> + else
> + fp->fmt_type = UAC_FORMAT_TYPE_III;
> +
> + err = parse_audio_format_i(chip, fp, format, as);
> + if (err < 0)
> + return err;
> +
> + return 0;
You can simply return from parse_audio_format_i() without err check.
> @@ -460,9 +461,10 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
>
> validx += cval->idx_off;
>
> +
Superfluous blank line.
> @@ -718,16 +721,104 @@ static int check_input_term(struct mixer_build *state, int id,
> + } else { /* UAC_VERSION_2 */
> + struct uac2_input_terminal_descriptor *d = p1;
> +
> + /* call recursively to verify that the
> + * referenced clock entity is valid */
Fix the comment style.
> @@ -624,38 +708,158 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
> iface_no, altno, as->bTerminalLink);
> continue;
> }
> - }
>
> - /* get format type */
> - fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
> - if (!fmt) {
> + case UAC_VERSION_3: {
> + struct uac3_input_terminal_descriptor *input_term;
> + struct uac3_output_terminal_descriptor *output_term;
> + struct uac3_as_header_descriptor *as;
> + struct uac3_cluster_header_descriptor *cluster;
> + struct uac3_hc_descriptor_header hc_header;
> + u16 cluster_id, wLength;
(snip)
Now snd_usb_parse_audio_interface() becomes too lengthy and hard to
read through. It'd be great if you can split / cleanup this in
another patch.
thanks,
Takashi
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
@ 2017-11-08 14:38 ` Takashi Iwai
0 siblings, 0 replies; 18+ messages in thread
From: Takashi Iwai @ 2017-11-08 14:38 UTC (permalink / raw)
To: Ruslan Bilovol; +Cc: Greg Kroah-Hartman, alsa-devel, linux-kernel
On Tue, 07 Nov 2017 03:01:20 +0100,
Ruslan Bilovol wrote:
>
> Recently released USB Audio Class 3.0 specification
> introduces many significant changes comparing to
> previous versions, like
> - new Power Domains, support for LPM/L1
> - new Cluster descriptor
> - changed layout of all class-specific descriptors
> - new High Capability descriptors
> - New class-specific String descriptors
> - new and removed units
> - additional sources for interrupts
> - removed Type II Audio Data Formats
> - ... and many other things (check spec)
>
> It also provides backward compatibility through
> multiple configurations, as well as requires
> mandatory support for BADD (Basic Audio Device
> Definition) on each ADC3.0 compliant device
>
> This patch adds initial support of UAC3 specification
> that is enough for Generic I/O Profile (BAOF, BAIF)
> device support from BADD document.
>
> Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
The patch looks good, but the timing is fairly late for merging to
4.15.
So from my side, the primary question is whether the changes in USB
(audio) header files are OK for USB guys.
Greg, could you check these changes and give an ack if it's OK to
merge? Or if you prefer postpone, just let me know.
Below are some nitpicking:
> --- a/include/linux/usb/audio-v2.h
> +++ b/include/linux/usb/audio-v2.h
> @@ -33,12 +33,12 @@
> *
> */
>
> -static inline bool uac2_control_is_readable(u32 bmControls, u8 control)
> +static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control)
> {
> return (bmControls >> (control * 2)) & 0x1;
> }
>
> -static inline bool uac2_control_is_writeable(u32 bmControls, u8 control)
> +static inline bool uac_v2v3_control_is_writeable(u32 bmControls, u8 control)
> {
> return (bmControls >> (control * 2)) & 0x2;
> }
This change looks a bit strange, but later one I noticed the reason
you didn't copy these functions into usb/audio-v3.h. Though, I guess
a compiler can optimize out even if you call the same inline code
twice for v2 and v3...
In anyway, if we do rename, let's mention about it in the comment.
> diff --git a/include/linux/usb/audio-v3.h b/include/linux/usb/audio-v3.h
> new file mode 100644
> index 0000000..cbbe51e
> --- /dev/null
> +++ b/include/linux/usb/audio-v3.h
> @@ -0,0 +1,343 @@
> +// SPDX-License-Identifier: GPL-2.0+
You can use the C-style comment for SPDX line,
/* SPDX-License-Identifier: GPL-2.0+ */
> +static struct uac3_clock_source_descriptor *
> + snd_usb_find_clock_source_v3(struct usb_host_interface *ctrl_iface,
> + int clock_id)
> +{
> + struct uac3_clock_source_descriptor *cs = NULL;
> +
> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
> + ctrl_iface->extralen,
> + cs, UAC3_CLOCK_SOURCE))) {
> + if (cs->bClockID == clock_id)
> + return cs;
> + }
> +
> + return NULL;
> +}
We may clean up the whole find_clock_xxx stuff later, but let's keep
it dumb and straight for now...
> +static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
> + unsigned long *visited, bool validate)
> +{
(snip)
> + /* the entity ID we are looking for is a selector.
> + * find out what it currently selects */
The multi-line comment should be properly formatted like
/*
* XXX
*/
> + /* The current clock source is invalid, try others. */
> + for (i = 1; i <= selector->bNrInPins; i++) {
> + int err;
> +
> + if (i == cur)
> + continue;
> +
> + ret = __uac3_clock_find_source(chip, selector->baCSourceID[i - 1],
> + visited, true);
> + if (ret < 0)
> + continue;
> +
> + err = uac_clock_selector_set_val(chip, entity_id, i);
> + if (err < 0)
> + continue;
> +
> + usb_audio_info(chip,
> + "found and selected valid clock source %d\n",
> + ret);
Do we need to print this at each time?
> static int parse_audio_format_i(struct snd_usb_audio *chip,
> - struct audioformat *fp, unsigned int format,
> - struct uac_format_type_i_continuous_descriptor *fmt)
> + struct audioformat *fp, u64 format,
> + void *_fmt)
> {
> snd_pcm_format_t pcm_format;
> + unsigned int fmt_type;
> int ret;
>
> - if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
> + switch (fp->protocol) {
> + default:
> + case UAC_VERSION_1:
> + case UAC_VERSION_2: {
> + struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
> +
> + fmt_type = fmt->bFormatType;
> + break;
> + }
> + case UAC_VERSION_3: {
> + /* fp->fmt_type is already set in this case */
> + fmt_type = fp->fmt_type;
> + break;
> + }
> + }
The double-braces don't look beautiful. And in this case it's just
for the temporary fmt variable, so it can be moved to the top level
and drop the internal whole braces.
> @@ -405,15 +435,20 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
> */
> switch (fp->protocol) {
> default:
> - case UAC_VERSION_1:
> + case UAC_VERSION_1: {
> + struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
> +
> fp->channels = fmt->bNrChannels;
> ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
> break;
> + }
> case UAC_VERSION_2:
> + case UAC_VERSION_3: {
> /* fp->channels is already set in this case */
> - ret = parse_audio_format_rates_v2(chip, fp);
> + ret = parse_audio_format_rates_v2v3(chip, fp);
> break;
> }
> + }
DItto.
> @@ -520,3 +555,23 @@ int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
> return 0;
> }
>
> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
> + struct audioformat *fp,
> + struct uac3_as_header_descriptor *as,
> + int stream)
> +{
> + u64 format = le64_to_cpu(as->bmFormats);
> + int err;
> +
> + /* Type I format bits are D0..D6 */
> + if (format & 0x7f)
> + fp->fmt_type = UAC_FORMAT_TYPE_I;
> + else
> + fp->fmt_type = UAC_FORMAT_TYPE_III;
> +
> + err = parse_audio_format_i(chip, fp, format, as);
> + if (err < 0)
> + return err;
> +
> + return 0;
You can simply return from parse_audio_format_i() without err check.
> @@ -460,9 +461,10 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
>
> validx += cval->idx_off;
>
> +
Superfluous blank line.
> @@ -718,16 +721,104 @@ static int check_input_term(struct mixer_build *state, int id,
> + } else { /* UAC_VERSION_2 */
> + struct uac2_input_terminal_descriptor *d = p1;
> +
> + /* call recursively to verify that the
> + * referenced clock entity is valid */
Fix the comment style.
> @@ -624,38 +708,158 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
> iface_no, altno, as->bTerminalLink);
> continue;
> }
> - }
>
> - /* get format type */
> - fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
> - if (!fmt) {
> + case UAC_VERSION_3: {
> + struct uac3_input_terminal_descriptor *input_term;
> + struct uac3_output_terminal_descriptor *output_term;
> + struct uac3_as_header_descriptor *as;
> + struct uac3_cluster_header_descriptor *cluster;
> + struct uac3_hc_descriptor_header hc_header;
> + u16 cluster_id, wLength;
(snip)
Now snd_usb_parse_audio_interface() becomes too lengthy and hard to
read through. It'd be great if you can split / cleanup this in
another patch.
thanks,
Takashi
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-07 2:01 ` [PATCH 1/1] ALSA: usb: initial " Ruslan Bilovol
@ 2017-11-08 16:46 ` kbuild test robot
2017-11-08 16:46 ` kbuild test robot
2017-11-08 19:38 ` [alsa-devel] " Pierre-Louis Bossart
2 siblings, 0 replies; 18+ messages in thread
From: kbuild test robot @ 2017-11-08 16:46 UTC (permalink / raw)
To: Ruslan Bilovol
Cc: kbuild-all, Takashi Iwai, Greg Kroah-Hartman, alsa-devel, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 15921 bytes --]
Hi Ruslan,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on sound/for-next]
[also build test WARNING on v4.14-rc8 next-20171108]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Ruslan-Bilovol/USB-Audio-Device-Class-3-0-support/20171108-235800
base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=mips
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
sound/usb/stream.c: In function 'snd_usb_parse_audio_interface':
>> sound/usb/stream.c:917:8: warning: 'fmt' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (snd_usb_parse_audio_format(chip, fp, format,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fmt, stream) < 0) {
~~~~~~~~~~~~
vim +/fmt +917 sound/usb/stream.c
561
562 int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
563 {
564 struct usb_device *dev;
565 struct usb_interface *iface;
566 struct usb_host_interface *alts;
567 struct usb_interface_descriptor *altsd;
568 int i, altno, err, stream;
569 u64 format = 0;
570 unsigned int num_channels = 0;
571 struct audioformat *fp = NULL;
572 int num, protocol, clock = 0;
573 struct uac_format_type_i_continuous_descriptor *fmt;
574 struct snd_pcm_chmap_elem *chmap_v3 = NULL;
575 unsigned int chconfig;
576
577 dev = chip->dev;
578
579 /* parse the interface's altsettings */
580 iface = usb_ifnum_to_if(dev, iface_no);
581
582 num = iface->num_altsetting;
583
584 /*
585 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
586 * one misses syncpipe, and does not produce any sound.
587 */
588 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
589 num = 4;
590
591 for (i = 0; i < num; i++) {
592 alts = &iface->altsetting[i];
593 altsd = get_iface_desc(alts);
594 protocol = altsd->bInterfaceProtocol;
595 /* skip invalid one */
596 if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
597 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
598 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
599 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
600 altsd->bNumEndpoints < 1 ||
601 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
602 continue;
603 /* must be isochronous */
604 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
605 USB_ENDPOINT_XFER_ISOC)
606 continue;
607 /* check direction */
608 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
609 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
610 altno = altsd->bAlternateSetting;
611
612 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
613 continue;
614
615 /*
616 * Roland audio streaming interfaces are marked with protocols
617 * 0/1/2, but are UAC 1 compatible.
618 */
619 if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
620 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
621 protocol <= 2)
622 protocol = UAC_VERSION_1;
623
624 chconfig = 0;
625 /* get audio formats */
626 switch (protocol) {
627 default:
628 dev_dbg(&dev->dev, "%u:%d: unknown interface protocol %#02x, assuming v1\n",
629 iface_no, altno, protocol);
630 protocol = UAC_VERSION_1;
631 /* fall through */
632
633 case UAC_VERSION_1: {
634 struct uac1_as_header_descriptor *as =
635 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
636 struct uac_input_terminal_descriptor *iterm;
637
638 if (!as) {
639 dev_err(&dev->dev,
640 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
641 iface_no, altno);
642 continue;
643 }
644
645 if (as->bLength < sizeof(*as)) {
646 dev_err(&dev->dev,
647 "%u:%d : invalid UAC_AS_GENERAL desc\n",
648 iface_no, altno);
649 continue;
650 }
651
652 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
653
654 iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
655 as->bTerminalLink);
656 if (iterm) {
657 num_channels = iterm->bNrChannels;
658 chconfig = le16_to_cpu(iterm->wChannelConfig);
659 }
660
661 break;
662 }
663
664 case UAC_VERSION_2: {
665 struct uac2_input_terminal_descriptor *input_term;
666 struct uac2_output_terminal_descriptor *output_term;
667 struct uac2_as_header_descriptor *as =
668 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
669
670 if (!as) {
671 dev_err(&dev->dev,
672 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
673 iface_no, altno);
674 continue;
675 }
676
677 if (as->bLength < sizeof(*as)) {
678 dev_err(&dev->dev,
679 "%u:%d : invalid UAC_AS_GENERAL desc\n",
680 iface_no, altno);
681 continue;
682 }
683
684 num_channels = as->bNrChannels;
685 format = le32_to_cpu(as->bmFormats);
686 chconfig = le32_to_cpu(as->bmChannelConfig);
687
688 /* lookup the terminal associated to this interface
689 * to extract the clock */
690 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
691 as->bTerminalLink);
692 if (input_term) {
693 clock = input_term->bCSourceID;
694 if (!chconfig && (num_channels == input_term->bNrChannels))
695 chconfig = le32_to_cpu(input_term->bmChannelConfig);
696 break;
697 }
698
699 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
700 as->bTerminalLink);
701 if (output_term) {
702 clock = output_term->bCSourceID;
703 break;
704 }
705
706 dev_err(&dev->dev,
707 "%u:%d : bogus bTerminalLink %d\n",
708 iface_no, altno, as->bTerminalLink);
709 continue;
710 }
711
712 case UAC_VERSION_3: {
713 struct uac3_input_terminal_descriptor *input_term;
714 struct uac3_output_terminal_descriptor *output_term;
715 struct uac3_as_header_descriptor *as;
716 struct uac3_cluster_header_descriptor *cluster;
717 struct uac3_hc_descriptor_header hc_header;
718 u16 cluster_id, wLength;
719
720 as = snd_usb_find_csint_desc(alts->extra,
721 alts->extralen,
722 NULL, UAC_AS_GENERAL);
723
724 if (!as) {
725 dev_err(&dev->dev,
726 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
727 iface_no, altno);
728 continue;
729 }
730
731 if (as->bLength < sizeof(*as)) {
732 dev_err(&dev->dev,
733 "%u:%d : invalid UAC_AS_GENERAL desc\n",
734 iface_no, altno);
735 continue;
736 }
737
738 cluster_id = le16_to_cpu(as->wClusterDescrID);
739 if (!cluster_id) {
740 dev_err(&dev->dev,
741 "%u:%d : no cluster descriptor\n",
742 iface_no, altno);
743 continue;
744 }
745
746 /*
747 * Get number of channels and channel map through
748 * High Capability Cluster Descriptor
749 *
750 * First step: get High Capability header and
751 * read size of Cluster Descriptor
752 */
753 err = snd_usb_ctl_msg(chip->dev,
754 usb_rcvctrlpipe(chip->dev, 0),
755 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
756 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
757 cluster_id,
758 snd_usb_ctrl_intf(chip),
759 &hc_header, sizeof(hc_header));
760 if (err < 0)
761 return err;
762 else if (err != sizeof(hc_header)) {
763 dev_err(&dev->dev,
764 "%u:%d : can't get High Capability descriptor\n",
765 iface_no, altno);
766 return -EIO;
767 }
768
769 /*
770 * Second step: allocate needed amount of memory
771 * and request Cluster Descriptor
772 */
773 wLength = le16_to_cpu(hc_header.wLength);
774 cluster = kzalloc(wLength, GFP_KERNEL);
775 if (!cluster)
776 return -ENOMEM;
777 err = snd_usb_ctl_msg(chip->dev,
778 usb_rcvctrlpipe(chip->dev, 0),
779 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
780 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
781 cluster_id,
782 snd_usb_ctrl_intf(chip),
783 cluster, wLength);
784 if (err < 0) {
785 kfree(cluster);
786 return err;
787 } else if (err != wLength) {
788 dev_err(&dev->dev,
789 "%u:%d : can't get Cluster Descriptor\n",
790 iface_no, altno);
791 kfree(cluster);
792 return -EIO;
793 }
794
795 num_channels = cluster->bNrChannels;
796 chmap_v3 = convert_chmap_v3(cluster);
797
798 kfree(cluster);
799
800 format = le64_to_cpu(as->bmFormats);
801
802 /* lookup the terminal associated to this interface
803 * to extract the clock */
804 input_term = snd_usb_find_input_terminal_descriptor(
805 chip->ctrl_intf,
806 as->bTerminalLink);
807
808 if (input_term) {
809 clock = input_term->bCSourceID;
810 break;
811 }
812
813 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
814 as->bTerminalLink);
815 if (output_term) {
816 clock = output_term->bCSourceID;
817 break;
818 }
819
820 dev_err(&dev->dev,
821 "%u:%d : bogus bTerminalLink %d\n",
822 iface_no, altno, as->bTerminalLink);
823 continue;
824 }
825 }
826
827 if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) {
828 /* get format type */
829 fmt = snd_usb_find_csint_desc(alts->extra,
830 alts->extralen,
831 NULL, UAC_FORMAT_TYPE);
832 if (!fmt) {
833 dev_err(&dev->dev,
834 "%u:%d : no UAC_FORMAT_TYPE desc\n",
835 iface_no, altno);
836 continue;
837 }
838 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8))
839 || ((protocol == UAC_VERSION_2) &&
840 (fmt->bLength < 6))) {
841 dev_err(&dev->dev,
842 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
843 iface_no, altno);
844 continue;
845 }
846
847 /*
848 * Blue Microphones workaround: The last altsetting is
849 * identical with the previous one, except for a larger
850 * packet size, but is actually a mislabeled two-channel
851 * setting; ignore it.
852 */
853 if (fmt->bNrChannels == 1 &&
854 fmt->bSubframeSize == 2 &&
855 altno == 2 && num == 3 &&
856 fp && fp->altsetting == 1 && fp->channels == 1 &&
857 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
858 protocol == UAC_VERSION_1 &&
859 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
860 fp->maxpacksize * 2)
861 continue;
862 }
863
864 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
865 if (!fp)
866 return -ENOMEM;
867
868 fp->iface = iface_no;
869 fp->altsetting = altno;
870 fp->altset_idx = i;
871 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
872 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
873 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
874 fp->protocol = protocol;
875 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
876 fp->channels = num_channels;
877 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
878 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
879 * (fp->maxpacksize & 0x7ff);
880 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
881 fp->clock = clock;
882 INIT_LIST_HEAD(&fp->list);
883
884 /* some quirks for attributes here */
885
886 switch (chip->usb_id) {
887 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
888 /* Optoplay sets the sample rate attribute although
889 * it seems not supporting it in fact.
890 */
891 fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
892 break;
893 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
894 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
895 /* doesn't set the sample rate attribute, but supports it */
896 fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
897 break;
898 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */
899 case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */
900 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
901 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
902 an older model 77d:223) */
903 /*
904 * plantronics headset and Griffin iMic have set adaptive-in
905 * although it's really not...
906 */
907 fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
908 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
909 fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
910 else
911 fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
912 break;
913 }
914
915 /* ok, let's parse further... */
916 if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) {
> 917 if (snd_usb_parse_audio_format(chip, fp, format,
918 fmt, stream) < 0) {
919 kfree(fp->rate_table);
920 kfree(fp);
921 fp = NULL;
922 continue;
923 }
924 } else {
925 struct uac3_as_header_descriptor *as;
926
927 as = snd_usb_find_csint_desc(alts->extra,
928 alts->extralen,
929 NULL, UAC_AS_GENERAL);
930
931 if (snd_usb_parse_audio_format_v3(chip, fp, as,
932 stream) < 0) {
933 kfree(fp->rate_table);
934 kfree(fp);
935 fp = NULL;
936 continue;
937 }
938 }
939
940 /* Create chmap */
941 if (fp->channels != num_channels)
942 chconfig = 0;
943
944 if (protocol == UAC_VERSION_3)
945 fp->chmap = chmap_v3;
946 else
947 fp->chmap = convert_chmap(fp->channels, chconfig,
948 protocol);
949
950 dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint);
951 err = snd_usb_add_audio_stream(chip, stream, fp);
952 if (err < 0) {
953 list_del(&fp->list); /* unlink for avoiding double-free */
954 kfree(fp->rate_table);
955 kfree(fp->chmap);
956 kfree(fp);
957 return err;
958 }
959 /* try to set the interface... */
960 usb_set_interface(chip->dev, iface_no, altno);
961 snd_usb_init_pitch(chip, iface_no, alts, fp);
962 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
963 }
964 return 0;
965 }
966
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 47745 bytes --]
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
@ 2017-11-08 16:46 ` kbuild test robot
0 siblings, 0 replies; 18+ messages in thread
From: kbuild test robot @ 2017-11-08 16:46 UTC (permalink / raw)
To: Ruslan Bilovol
Cc: Greg Kroah-Hartman, alsa-devel, kbuild-all, linux-kernel, Takashi Iwai
[-- Attachment #1: Type: text/plain, Size: 15921 bytes --]
Hi Ruslan,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on sound/for-next]
[also build test WARNING on v4.14-rc8 next-20171108]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Ruslan-Bilovol/USB-Audio-Device-Class-3-0-support/20171108-235800
base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=mips
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
sound/usb/stream.c: In function 'snd_usb_parse_audio_interface':
>> sound/usb/stream.c:917:8: warning: 'fmt' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (snd_usb_parse_audio_format(chip, fp, format,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fmt, stream) < 0) {
~~~~~~~~~~~~
vim +/fmt +917 sound/usb/stream.c
561
562 int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
563 {
564 struct usb_device *dev;
565 struct usb_interface *iface;
566 struct usb_host_interface *alts;
567 struct usb_interface_descriptor *altsd;
568 int i, altno, err, stream;
569 u64 format = 0;
570 unsigned int num_channels = 0;
571 struct audioformat *fp = NULL;
572 int num, protocol, clock = 0;
573 struct uac_format_type_i_continuous_descriptor *fmt;
574 struct snd_pcm_chmap_elem *chmap_v3 = NULL;
575 unsigned int chconfig;
576
577 dev = chip->dev;
578
579 /* parse the interface's altsettings */
580 iface = usb_ifnum_to_if(dev, iface_no);
581
582 num = iface->num_altsetting;
583
584 /*
585 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
586 * one misses syncpipe, and does not produce any sound.
587 */
588 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
589 num = 4;
590
591 for (i = 0; i < num; i++) {
592 alts = &iface->altsetting[i];
593 altsd = get_iface_desc(alts);
594 protocol = altsd->bInterfaceProtocol;
595 /* skip invalid one */
596 if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
597 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
598 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
599 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
600 altsd->bNumEndpoints < 1 ||
601 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
602 continue;
603 /* must be isochronous */
604 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
605 USB_ENDPOINT_XFER_ISOC)
606 continue;
607 /* check direction */
608 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
609 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
610 altno = altsd->bAlternateSetting;
611
612 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
613 continue;
614
615 /*
616 * Roland audio streaming interfaces are marked with protocols
617 * 0/1/2, but are UAC 1 compatible.
618 */
619 if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
620 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
621 protocol <= 2)
622 protocol = UAC_VERSION_1;
623
624 chconfig = 0;
625 /* get audio formats */
626 switch (protocol) {
627 default:
628 dev_dbg(&dev->dev, "%u:%d: unknown interface protocol %#02x, assuming v1\n",
629 iface_no, altno, protocol);
630 protocol = UAC_VERSION_1;
631 /* fall through */
632
633 case UAC_VERSION_1: {
634 struct uac1_as_header_descriptor *as =
635 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
636 struct uac_input_terminal_descriptor *iterm;
637
638 if (!as) {
639 dev_err(&dev->dev,
640 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
641 iface_no, altno);
642 continue;
643 }
644
645 if (as->bLength < sizeof(*as)) {
646 dev_err(&dev->dev,
647 "%u:%d : invalid UAC_AS_GENERAL desc\n",
648 iface_no, altno);
649 continue;
650 }
651
652 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
653
654 iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
655 as->bTerminalLink);
656 if (iterm) {
657 num_channels = iterm->bNrChannels;
658 chconfig = le16_to_cpu(iterm->wChannelConfig);
659 }
660
661 break;
662 }
663
664 case UAC_VERSION_2: {
665 struct uac2_input_terminal_descriptor *input_term;
666 struct uac2_output_terminal_descriptor *output_term;
667 struct uac2_as_header_descriptor *as =
668 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
669
670 if (!as) {
671 dev_err(&dev->dev,
672 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
673 iface_no, altno);
674 continue;
675 }
676
677 if (as->bLength < sizeof(*as)) {
678 dev_err(&dev->dev,
679 "%u:%d : invalid UAC_AS_GENERAL desc\n",
680 iface_no, altno);
681 continue;
682 }
683
684 num_channels = as->bNrChannels;
685 format = le32_to_cpu(as->bmFormats);
686 chconfig = le32_to_cpu(as->bmChannelConfig);
687
688 /* lookup the terminal associated to this interface
689 * to extract the clock */
690 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
691 as->bTerminalLink);
692 if (input_term) {
693 clock = input_term->bCSourceID;
694 if (!chconfig && (num_channels == input_term->bNrChannels))
695 chconfig = le32_to_cpu(input_term->bmChannelConfig);
696 break;
697 }
698
699 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
700 as->bTerminalLink);
701 if (output_term) {
702 clock = output_term->bCSourceID;
703 break;
704 }
705
706 dev_err(&dev->dev,
707 "%u:%d : bogus bTerminalLink %d\n",
708 iface_no, altno, as->bTerminalLink);
709 continue;
710 }
711
712 case UAC_VERSION_3: {
713 struct uac3_input_terminal_descriptor *input_term;
714 struct uac3_output_terminal_descriptor *output_term;
715 struct uac3_as_header_descriptor *as;
716 struct uac3_cluster_header_descriptor *cluster;
717 struct uac3_hc_descriptor_header hc_header;
718 u16 cluster_id, wLength;
719
720 as = snd_usb_find_csint_desc(alts->extra,
721 alts->extralen,
722 NULL, UAC_AS_GENERAL);
723
724 if (!as) {
725 dev_err(&dev->dev,
726 "%u:%d : UAC_AS_GENERAL descriptor not found\n",
727 iface_no, altno);
728 continue;
729 }
730
731 if (as->bLength < sizeof(*as)) {
732 dev_err(&dev->dev,
733 "%u:%d : invalid UAC_AS_GENERAL desc\n",
734 iface_no, altno);
735 continue;
736 }
737
738 cluster_id = le16_to_cpu(as->wClusterDescrID);
739 if (!cluster_id) {
740 dev_err(&dev->dev,
741 "%u:%d : no cluster descriptor\n",
742 iface_no, altno);
743 continue;
744 }
745
746 /*
747 * Get number of channels and channel map through
748 * High Capability Cluster Descriptor
749 *
750 * First step: get High Capability header and
751 * read size of Cluster Descriptor
752 */
753 err = snd_usb_ctl_msg(chip->dev,
754 usb_rcvctrlpipe(chip->dev, 0),
755 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
756 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
757 cluster_id,
758 snd_usb_ctrl_intf(chip),
759 &hc_header, sizeof(hc_header));
760 if (err < 0)
761 return err;
762 else if (err != sizeof(hc_header)) {
763 dev_err(&dev->dev,
764 "%u:%d : can't get High Capability descriptor\n",
765 iface_no, altno);
766 return -EIO;
767 }
768
769 /*
770 * Second step: allocate needed amount of memory
771 * and request Cluster Descriptor
772 */
773 wLength = le16_to_cpu(hc_header.wLength);
774 cluster = kzalloc(wLength, GFP_KERNEL);
775 if (!cluster)
776 return -ENOMEM;
777 err = snd_usb_ctl_msg(chip->dev,
778 usb_rcvctrlpipe(chip->dev, 0),
779 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
780 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
781 cluster_id,
782 snd_usb_ctrl_intf(chip),
783 cluster, wLength);
784 if (err < 0) {
785 kfree(cluster);
786 return err;
787 } else if (err != wLength) {
788 dev_err(&dev->dev,
789 "%u:%d : can't get Cluster Descriptor\n",
790 iface_no, altno);
791 kfree(cluster);
792 return -EIO;
793 }
794
795 num_channels = cluster->bNrChannels;
796 chmap_v3 = convert_chmap_v3(cluster);
797
798 kfree(cluster);
799
800 format = le64_to_cpu(as->bmFormats);
801
802 /* lookup the terminal associated to this interface
803 * to extract the clock */
804 input_term = snd_usb_find_input_terminal_descriptor(
805 chip->ctrl_intf,
806 as->bTerminalLink);
807
808 if (input_term) {
809 clock = input_term->bCSourceID;
810 break;
811 }
812
813 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
814 as->bTerminalLink);
815 if (output_term) {
816 clock = output_term->bCSourceID;
817 break;
818 }
819
820 dev_err(&dev->dev,
821 "%u:%d : bogus bTerminalLink %d\n",
822 iface_no, altno, as->bTerminalLink);
823 continue;
824 }
825 }
826
827 if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) {
828 /* get format type */
829 fmt = snd_usb_find_csint_desc(alts->extra,
830 alts->extralen,
831 NULL, UAC_FORMAT_TYPE);
832 if (!fmt) {
833 dev_err(&dev->dev,
834 "%u:%d : no UAC_FORMAT_TYPE desc\n",
835 iface_no, altno);
836 continue;
837 }
838 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8))
839 || ((protocol == UAC_VERSION_2) &&
840 (fmt->bLength < 6))) {
841 dev_err(&dev->dev,
842 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
843 iface_no, altno);
844 continue;
845 }
846
847 /*
848 * Blue Microphones workaround: The last altsetting is
849 * identical with the previous one, except for a larger
850 * packet size, but is actually a mislabeled two-channel
851 * setting; ignore it.
852 */
853 if (fmt->bNrChannels == 1 &&
854 fmt->bSubframeSize == 2 &&
855 altno == 2 && num == 3 &&
856 fp && fp->altsetting == 1 && fp->channels == 1 &&
857 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
858 protocol == UAC_VERSION_1 &&
859 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
860 fp->maxpacksize * 2)
861 continue;
862 }
863
864 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
865 if (!fp)
866 return -ENOMEM;
867
868 fp->iface = iface_no;
869 fp->altsetting = altno;
870 fp->altset_idx = i;
871 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
872 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
873 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
874 fp->protocol = protocol;
875 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
876 fp->channels = num_channels;
877 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
878 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
879 * (fp->maxpacksize & 0x7ff);
880 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
881 fp->clock = clock;
882 INIT_LIST_HEAD(&fp->list);
883
884 /* some quirks for attributes here */
885
886 switch (chip->usb_id) {
887 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
888 /* Optoplay sets the sample rate attribute although
889 * it seems not supporting it in fact.
890 */
891 fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
892 break;
893 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
894 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
895 /* doesn't set the sample rate attribute, but supports it */
896 fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
897 break;
898 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */
899 case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */
900 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
901 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
902 an older model 77d:223) */
903 /*
904 * plantronics headset and Griffin iMic have set adaptive-in
905 * although it's really not...
906 */
907 fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
908 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
909 fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
910 else
911 fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
912 break;
913 }
914
915 /* ok, let's parse further... */
916 if (protocol == UAC_VERSION_1 || protocol == UAC_VERSION_2) {
> 917 if (snd_usb_parse_audio_format(chip, fp, format,
918 fmt, stream) < 0) {
919 kfree(fp->rate_table);
920 kfree(fp);
921 fp = NULL;
922 continue;
923 }
924 } else {
925 struct uac3_as_header_descriptor *as;
926
927 as = snd_usb_find_csint_desc(alts->extra,
928 alts->extralen,
929 NULL, UAC_AS_GENERAL);
930
931 if (snd_usb_parse_audio_format_v3(chip, fp, as,
932 stream) < 0) {
933 kfree(fp->rate_table);
934 kfree(fp);
935 fp = NULL;
936 continue;
937 }
938 }
939
940 /* Create chmap */
941 if (fp->channels != num_channels)
942 chconfig = 0;
943
944 if (protocol == UAC_VERSION_3)
945 fp->chmap = chmap_v3;
946 else
947 fp->chmap = convert_chmap(fp->channels, chconfig,
948 protocol);
949
950 dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint);
951 err = snd_usb_add_audio_stream(chip, stream, fp);
952 if (err < 0) {
953 list_del(&fp->list); /* unlink for avoiding double-free */
954 kfree(fp->rate_table);
955 kfree(fp->chmap);
956 kfree(fp);
957 return err;
958 }
959 /* try to set the interface... */
960 usb_set_interface(chip->dev, iface_no, altno);
961 snd_usb_init_pitch(chip, iface_no, alts, fp);
962 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
963 }
964 return 0;
965 }
966
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [alsa-devel] [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-07 2:01 ` [PATCH 1/1] ALSA: usb: initial " Ruslan Bilovol
2017-11-08 14:38 ` Takashi Iwai
2017-11-08 16:46 ` kbuild test robot
@ 2017-11-08 19:38 ` Pierre-Louis Bossart
2017-11-11 2:48 ` Ruslan Bilovol
2 siblings, 1 reply; 18+ messages in thread
From: Pierre-Louis Bossart @ 2017-11-08 19:38 UTC (permalink / raw)
To: Ruslan Bilovol, Takashi Iwai; +Cc: Greg Kroah-Hartman, alsa-devel, linux-kernel
Nice work, thanks! I double-checked all the descriptors and values and
didn't find anything problematic, the main comment I have is that the
clock source/selection could probably be refactored since the
differences are really minor with UAC2, and there is work to do to
select the right Audio Interface Association.
On 11/6/17 8:01 PM, Ruslan Bilovol wrote:
> Recently released USB Audio Class 3.0 specification
> introduces many significant changes comparing to
> previous versions, like
> - new Power Domains, support for LPM/L1
> - new Cluster descriptor
> - changed layout of all class-specific descriptors
> - new High Capability descriptors
> - New class-specific String descriptors
> - new and removed units
> - additional sources for interrupts
> - removed Type II Audio Data Formats
> - ... and many other things (check spec)
>
> It also provides backward compatibility through
> multiple configurations, as well as requires
> mandatory support for BADD (Basic Audio Device
> Definition) on each ADC3.0 compliant device
>
> This patch adds initial support of UAC3 specification
> that is enough for Generic I/O Profile (BAOF, BAIF)
> device support from BADD document.
Do you mean to say that the selection of the BADD profile or full-blown
descriptor capabilities will be handled in a follow-up patch?
It's my understanding from Section 3.3 that a UAC3 device is required to
expose
- a backwards-compatible configuration (UAC1 or UAC2),
- a UAC3 BADD profile
- one or more AIA compliant with UAC3 (which may have additional
features not present in the baseline description).
And I am not sure how a driver would make the selection...
In theory though, a UAC3 device should work out of the box even if the
host only supports UAC1 or UAC2.
> +/*
> + * v1.0, v2.0 and v3.0 of this standard have many things in common. For the rest
> + * of the definitions, please refer to audio.h and audio-v2.h
> + */
> +
> +/* All High Capability descriptors have these 2 fields at the beginning */
> +struct uac3_hc_descriptor_header {
> + __le16 wLength;
> + __u8 bDescriptorType;
> + __u8 bDescriptorSubtype;
> + __le16 wDescriptorID;
> +} __attribute__ ((packed));
> +
> +/* 4.3.1 CLUSTER DESCRIPTOR HEADER */
> +struct uac3_cluster_header_descriptor {
> + __le16 wLength;
> + __u8 bDescriptorType;
> + __u8 bDescriptorSubtype;
> + __le16 wDescriptorID;
> + __u8 bNrChannels;
> +} __attribute__ ((packed));
> +
> +/* 4.3.2.1 SEGMENTS */
> +struct uac3_cluster_segment_descriptor {
> + __le16 wLength;
> + __u8 bSegmentType;
> + /* __u8[0]; segment-specific data */
> +} __attribute__ ((packed));
> +
> +/* 4.3.2.1.1 END SEGMENT */
> +struct uac3_cluster_end_segment_descriptor {
> + __le16 wLength;
> + __u8 bSegmentType; /* Constant END_SEGMENT */
> +} __attribute__ ((packed));
> +
you didn't include the definitions in 4.3.2.1.2
Cluster Descriptor Segment
Vendor Defined Segment
> +/* 4.3.2.1.3.1 INFORMATION SEGMENT */
> +struct uac3_cluster_information_segment_descriptor {
> + __le16 wLength;
> + __u8 bSegmentType;
this field is a CHANNEL_INFORMATION constant.
> + __u8 bChPurpose;
> + __u8 bChRelationship;
> + __u8 bChGroupID;
> +} __attribute__ ((packed));
> +
> +/* 4.5.2 CLASS-SPECIFIC AC INTERFACE DESCRIPTOR */
> +struct uac3_ac_header_descriptor {
> + __u8 bLength; /* 10 */
> + __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
> + __u8 bDescriptorSubtype; /* HEADER descriptor subtype */
> + __u8 bCategory;
> +
> + /* includes Clock Source, Unit, Terminal, and Power Domain desc. */
> + __le16 wTotalLength;
> +
> + __le32 bmControls;
> +} __attribute__ ((packed));
> +
Missing extended terminal descriptor header from 4.5.2.3.2?
Missing multi-function processing unit descriptor header from 4.5.2.10.3 ?
> +
> +/* bmAttribute fields */
> +#define UAC3_CLOCK_SOURCE_TYPE_EXT 0x0
> +#define UAC3_CLOCK_SOURCE_TYPE_INT 0x1
> +#define UAC3_CLOCK_SOURCE_ASYNC (0 << 2)
> +#define UAC3_CLOCK_SOURCE_SYNCED_TO_SOF (1 << 1)
> +
> +/* 4.5.2.13 CLOCK SELECTOR DESCRIPTOR */
> +struct uac3_clock_selector_descriptor {
> + __u8 bLength;
> + __u8 bDescriptorType;
> + __u8 bDescriptorSubtype;
> + __u8 bClockID;
> + __u8 bNrInPins;
> + __u8 baCSourceID[];
> + /* bmControls and wCSelectorDescrStr omitted */
why is this omitted here and not below in the clock multiplier descriptor?
> +} __attribute__((packed) > +
> +/* 4.5.2.14 CLOCK MULTIPLIER DESCRIPTOR */
> +struct uac3_clock_multiplier_descriptor {
> + __u8 bLength;
> + __u8 bDescriptorType;
> + __u8 bDescriptorSubtype;
> + __u8 bClockID;
> + __u8 bCSourceID;
> + __le32 bmControls;
> + __le16 wCMultiplierDescrStr;
> +} __attribute__((packed));
[snip]
> +
> +/* 4.5.2.15 POWER DOMAIN DESCRIPTOR */
> +struct uac3_power_domain_descriptor {
> + __u8 bLength;
> + __u8 bDescriptorType;
> + __u8 bDescriptorSubtype;
> + __u8 bPowerDomainID;
> + __le16 waRecoveryTime1;
> + __le16 waRecoveryTime2;
> + __u8 bNrEntities;
> + __u8 baEntityID[];
> + /* wPDomainDescrStr omitted */
why?
> +} __attribute__((packed));
> +
> +/* As above, but more useful for defining your own descriptors */
> +#define DECLARE_UAC3_POWER_DOMAIN_DESCRIPTOR(n) \
> +struct uac3_power_domain_descriptor_##n { \
> + __u8 bLength; \
> + __u8 bDescriptorType; \
> + __u8 bDescriptorSubtype; \
> + __u8 bPowerDomainID; \
> + __le16 waRecoveryTime1; \
> + __le16 waRecoveryTime2; \
> + __u8 bNrEntities; \
> + __u8 baEntityID[n]; \
> + __le16 wPDomainDescrStr; \
> +} __attribute__ ((packed))
> +
any specific reason why the descriptors are not added in linear order,
following the spec definition? all the descriptors below could be added
earlier.
> +/* 4.5.2.1 INPUT TERMINAL DESCRIPTOR */
> +struct uac3_input_terminal_descriptor {
> + __u8 bLength;
> + __u8 bDescriptorType;
> + __u8 bDescriptorSubtype;
> + __u8 bTerminalID;
> + __le16 wTerminalType;
> + __u8 bAssocTerminal;
> + __u8 bCSourceID;
> + __le32 bmControls;
> + __le16 wClusterDescrID;
> + __le16 wExTerminalDescrID;
> + __le16 wConnectorsDescrID;
> + __le16 wTerminalDescrStr;
> +} __attribute__((packed));
> +
> +
> +/* 4.7.2 CLASS-SPECIFIC AS INTERFACE DESCRIPTOR */
> +struct uac3_as_header_descriptor {
> + __u8 bLength;
> + __u8 bDescriptorType;
> + __u8 bDescriptorSubtype;
> + __u8 bTerminalLink;
> + __le32 bmControls;
> + __le16 wClusterDescrID;
> + __le64 bmFormats;
> + __u8 bSubslotSize;
> + __u8 bBitResolution;
> + __le16 bmAuxProtocols;
> + __u8 bControlSize;
> +} __attribute__((packed));
> +
> +#define UAC3_FORMAT_TYPE_I_RAW_DATA (1 << 6)
This seems to come from Table A1 in the formats document, is it inserted
here because of the relationship with the bmFormats? If yes, we should
probably add the full list from Table A1 (as done below for the other codes)
> +
> +/* 4.8.1.2 CLASS-SPECIFIC AS ISOCHRONOUS AUDIO DATA ENDPOINT DESCRIPTOR */
> +struct uac3_iso_endpoint_descriptor {
> + __u8 bLength;
> + __u8 bDescriptorType;
> + __u8 bDescriptorSubtype;
> + __le32 bmControls;
> + __u8 bLockDelayUnits;
> + __le16 wLockDelay;
> +} __attribute__((packed));
> +
> +#define UAC3_CONTROL_PITCH (3 << 0)
> +#define UAC3_CONTROL_DATA_OVERRUN (3 << 2)
> +#define UAC3_CONTROL_DATA_UNDERRUN (3 << 4)
these are really masks, no?
> +
> +/* 6.1 INTERRUPT DATA MESSAGE */
> +#define UAC3_INTERRUPT_DATA_MSG_VENDOR (1 << 0)
> +#define UAC3_INTERRUPT_DATA_MSG_EP (1 << 1)
this is the same as in UAC2
> +
> +struct uac3_interrupt_data_msg {
> + __u8 bInfo;
> + __u8 bSourceType;
> + __le16 wValue;
> + __le16 wIndex;
> +} __attribute__((packed));
This seems identical to UAC2, the difference being the bSourceType with
additional values (was bAttribute).
> +
> +/* A.2 AUDIO AUDIO FUNCTION SUBCLASS CODES */
> +#define UAC3_FUNCTION_SUBCLASS_UNDEFINED 0x00
> +#define UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 0x01
> +#define UAC3_FUNCTION_SUBCLASS_GENERIC_IO 0x20
> +#define UAC3_FUNCTION_SUBCLASS_HEADPHONE 0x21
> +#define UAC3_FUNCTION_SUBCLASS_SPEAKER 0x22
> +#define UAC3_FUNCTION_SUBCLASS_MICROPHONE 0x23
> +#define UAC3_FUNCTION_SUBCLASS_HEADSET 0x24
> +#define UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER 0x25
> +#define UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE 0x26
mention that these are linked to BADD profiles.
> +
> +/* A.7 AUDIO FUNCTION CATEGORY CODES */
> +#define UAC3_FUNCTION_SUBCLASS_UNDEFINED 0x00
> +#define UAC3_FUNCTION_DESKTOP_SPEAKER 0x01
> +#define UAC3_FUNCTION_HOME_THEATER 0x02
> +#define UAC3_FUNCTION_MICROPHONE 0x03
> +#define UAC3_FUNCTION_HEADSET 0x04
> +#define UAC3_FUNCTION_TELEPHONE 0x05
> +#define UAC3_FUNCTION_CONVERTER 0x06
> +#define UAC3_FUNCTION_SOUND_RECORDER 0x07
> +#define UAC3_FUNCTION_IO_BOX 0x08
> +#define UAC3_FUNCTION_MUSICAL_INSTRUMENT 0x09
> +#define UAC3_FUNCTION_PRO_AUDIO 0x0a
> +#define UAC3_FUNCTION_AUDIO_VIDEO 0x0b
> +#define UAC3_FUNCTION_CONTROL_PANEL 0x0c
> +#define UAC3_FUNCTION_HEADPHONE 0x0d
> +#define UAC3_FUNCTION_GENERIC_SPEAKER 0x0e
> +#define UAC3_FUNCTION_HEADSET_ADAPTER 0x0f
> +#define UAC3_FUNCTION_SPEAKERPHONE 0x10
> +#define UAC3_FUNCTION_OTHER 0xff
> +
> +/* A.8 AUDIO CLASS-SPECIFIC DESCRIPTOR TYPES */
> +#define UAC3_CS_UNDEFINED 0x20
> +#define UAC3_CS_DEVICE 0x21
> +#define UAC3_CS_CONFIGURATION 0x22
> +#define UAC3_CS_STRING 0x23
> +#define UAC3_CS_INTERFACE 0x24
> +#define UAC3_CS_ENDPOINT 0x25
> +#define UAC3_CS_CLUSTER 0x26
> +
> +/* A.10 CLUSTER DESCRIPTOR SEGMENT TYPES */
> +#define UAC3_SEGMENT_UNDEFINED 0x00
> +#define UAC3_CLUSTER_DESCRIPTION 0x01
> +#define UAC3_CLUSTER_VENDOR_DEFINED 0x1F
> +#define UAC3_CHANNEL_INFORMATION 0x20
> +#define UAC3_CHANNEL_AMBISONIC 0x21
> +#define UAC3_CHANNEL_DESCRIPTION 0x22
> +#define UAC3_CHANNEL_VENDOR_DEFINED 0xFE
> +#define UAC3_END_SEGMENT 0xFF
> +
> +/* A.11 CHANNEL PURPOSE DEFINITIONS */
> +#define UAC3_PURPOSE_UNDEFINED 0x00
> +#define UAC3_PURPOSE_GENERIC_AUDIO 0x01
> +#define UAC3_PURPOSE_VOICE 0x02
> +#define UAC3_PURPOSE_SPEECH 0x03
> +#define UAC3_PURPOSE_AMBIENT 0x04
> +#define UAC3_PURPOSE_REFERENCE 0x05
> +#define UAC3_PURPOSE_ULTRASONIC 0x06
> +#define UAC3_PURPOSE_VIBROKINETIC 0x07
> +#define UAC3_PURPOSE_NON_AUDIO 0xFF
> +
> +/* A.12 CHANNEL RELATIONSHIP DEFINITIONS */
> +/* FIXME: spec is missing these constants. Few found in BasicAudioDevice3.pdf */
yes, this is a known bug in the released UAC3 document, the values were
removed by accident. If this helps, here's what I have from the last
release candidate, this will hopefully be corrected soon.
RELATIONSHIP_UNDEFINED UND 0x00
MONO M 0x01
LEFT L 0x02
RIGHT R 0x03
ARRAY AR 0x04
PATTERN_X PX 0x20
PATTERN_Y PY 0x21
PATTERN_A PA 0x22
PATTERN_B PB 0x23
PATTERN_M PM 0x24
PATTERN_S PS 0x25
Front Left FL 0x80
Front Right FR 0x81
Front Center FC 0x82
Front Left of Center FLC 0x83
Front Right of Center FRC 0x84
Front Wide Left FWL 0x85
Front Wide Right FWR 0x86
Side Left SL 0x87
Side Right SR 0x88
Surround Array Left SAL 0x89
Surround Array Right SAR 0x8A
Back Left BL 0x8B
Back Right BR 0x8C
Back Center BC 0x8D
Back Left of Center BLC 0x8E
Back Right of Center BRC 0x8F
Back Wide Left BWL 0x90
Back Wide Right BWR 0x91
Top Center TC 0x92
Top Front Left TFL 0x93
Top Front Right TFR 0x94
Top Front Center TFC 0x95
Top Front Left of Center TFLC 0x96
Top Front Right of Center TFRC 0x97
Top Front Wide Left TFWL 0x98
Top Front Wide Right TFWR 0x99
Top Side Left TSL 0x9A
Top Side Right TSR 0x9B
Top Surround Array Left TSAL 0x9C
Top Surround Array Right TSAR 0x9D
Top Back Left TBL 0x9E
Top Back Right TBR 0x9F
Top Back Center TBC 0xA0
Top Back Left Of Center TBLC 0xA1
Top Back Right Of Center TBRC 0xA2
Top Back Wide Left TBWL 0xA3
Top Back Wide Right TBWR 0xA4
Bottom Center BC 0xA5
Bottom Front Left BFL 0xA6
Bottom Front Right BFR 0xA7
Bottom Front Center BFC 0xA8
Bottom Front Left Of Center BFLC 0xA9
Bottom Front Right Of Center BFRC 0xAA
Bottom Front Wide Left BFWL 0xAB
Bottom Front Wide Right BFWR 0xAC
Bottom Side Left BSL 0xAD
Bottom Side Right BSR 0xAE
Bottom Surround Array Left BSAL 0xAF
Bottom Surround Array Right BSAR 0xB0
Bottom Back Left BBL 0xB1
Bottom Back Right BBR 0xB2
Bottom Back Center BBC 0xB3
Bottom Back Left Of Center BBLC 0xB4
Bottom Back Right Of Center BBRC 0xB5
Bottom Back Wide Left BBWL 0xB6
Bottom Back Wide Right BBWR 0xB7
Low Frequency Effects LFE 0xB8
Low Frequency Effects Left LFEL 0xB9
Low Frequency Effects Right LFER 0xBA
Headphone Left HPL 0xBB
Headphone Right HPR 0xBC
> +#define UAC3_CH_RELATIONSHIP_UNDEFINED 0x00
> +#define UAC3_CH_MONO 0x01
> +#define UAC3_CH_LEFT 0x02
> +#define UAC3_CH_RIGHT 0x03
> +#define UAC3_CH_FRONT_LEFT 0x80
> +#define UAC3_CH_FRONT_RIGHT 0x81
> +#define UAC3_CH_FRONT_CENTER 0x82
> +#define UAC3_CH_SURROUND_ARRAY_LEFT 0x89
> +#define UAC3_CH_SURROUND_ARRAY_RIGHT 0x8A
> +#define UAC3_CH_LOW_FREQUENCY_EFFECTS 0xB8
> +
> +/* A.15 AUDIO CLASS-SPECIFIC AC INTERFACE DESCRIPTOR SUBTYPES */
> +/* see audio.h for the rest, which is identical to v1 */
> +#define UAC3_EXTENDED_TERMINAL 0x04
> +#define UAC3_MIXER_UNIT 0x05
> +#define UAC3_SELECTOR_UNIT 0x06
> +#define UAC3_FEATURE_UNIT 0x07
> +#define UAC3_EFFECT_UNIT 0x08
> +#define UAC3_PROCESSING_UNIT 0x09
> +#define UAC3_EXTENSION_UNIT 0x0a
> +#define UAC3_CLOCK_SOURCE 0x0b
> +#define UAC3_CLOCK_SELECTOR 0x0c
> +#define UAC3_CLOCK_MULTIPLIER 0x0d
> +#define UAC3_SAMPLE_RATE_CONVERTER 0x0e
> +#define UAC3_CONNECTORS 0x0f
> +#define UAC3_POWER_DOMAIN 0x10
> +
> +/* A.22 AUDIO CLASS-SPECIFIC REQUEST CODES */
> +#define UAC3_CS_REQ_CUR 0x01
> +#define UAC3_CS_REQ_RANGE 0x02
> +#define UAC3_CS_REQ_MEM 0x03
these first 3 are already in UAC2
> +#define UAC3_CS_REQ_INTEN 0x04
> +#define UAC3_CS_REQ_STRING 0x05
> +#define UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR 0x06
the last 3 are really UAC3-specific
> +
> +/* A.23.1 AUDIOCONTROL INTERFACE CONTROL SELECTORS */
> +#define UAC3_AC_CONTROL_UNDEFINED 0x00
> +#define UAC3_AC_ACTIVE_INTERFACE_CONTROL 0x01
> +#define UAC3_AC_POWER_DOMAIN_CONTROL 0x02
> +
> +#endif /* __LINUX_USB_AUDIO_V3_H */
> diff --git a/include/uapi/linux/usb/audio.h b/include/uapi/linux/usb/audio.h
> index a4680a5..66ec2ae 100644
> --- a/include/uapi/linux/usb/audio.h
> +++ b/include/uapi/linux/usb/audio.h
> @@ -26,6 +26,7 @@
> /* bInterfaceProtocol values to denote the version of the standard used */
> #define UAC_VERSION_1 0x00
> #define UAC_VERSION_2 0x20
> +#define UAC_VERSION_3 0x30
>
> /* A.2 Audio Interface Subclass Codes */
> #define USB_SUBCLASS_AUDIOCONTROL 0x01
> diff --git a/sound/usb/card.c b/sound/usb/card.c
> index 3dc36d9..df3f0ab 100644
> --- a/sound/usb/card.c
> +++ b/sound/usb/card.c
> @@ -7,6 +7,7 @@
> * Alan Cox (alan@lxorguk.ukuu.org.uk)
> * Thomas Sailer (sailer@ife.ee.ethz.ch)
> *
> + * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
does this mean new copyright?
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License as published by
> @@ -44,6 +45,7 @@
> #include <linux/mutex.h>
> #include <linux/usb/audio.h>
> #include <linux/usb/audio-v2.h>
> +#include <linux/usb/audio-v3.h>
> #include <linux/module.h>
>
> #include <sound/control.h>
> @@ -261,7 +263,8 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
> break;
> }
>
> - case UAC_VERSION_2: {
> + case UAC_VERSION_2:
> + case UAC_VERSION_3: {
> struct usb_interface_assoc_descriptor *assoc =
> usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
>
> @@ -281,7 +284,7 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
> }
>
> if (!assoc) {
> - dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n");
> + dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
yes, but they can have more than one, so how do you handle the selection
(see 3.3)?
> return -EINVAL;
> }
>
> diff --git a/sound/usb/card.h b/sound/usb/card.h
> index 111b0f0..5e2934f 100644
> --- a/sound/usb/card.h
> +++ b/sound/usb/card.h
> @@ -21,7 +21,7 @@ struct audioformat {
> unsigned char endpoint; /* endpoint */
> unsigned char ep_attr; /* endpoint attributes */
> unsigned char datainterval; /* log_2 of data packet interval */
> - unsigned char protocol; /* UAC_VERSION_1/2 */
> + unsigned char protocol; /* UAC_VERSION_1/2/3 */
> unsigned int maxpacksize; /* max. packet size */
> unsigned int rates; /* rate bitmasks */
> unsigned int rate_min, rate_max; /* min/max rates */
> diff --git a/sound/usb/clock.c b/sound/usb/clock.c
> index 26dd5f2..04361d7 100644
> --- a/sound/usb/clock.c
> +++ b/sound/usb/clock.c
> @@ -23,6 +23,7 @@
> #include <linux/usb.h>
> #include <linux/usb/audio.h>
> #include <linux/usb/audio-v2.h>
> +#include <linux/usb/audio-v3.h>
>
> #include <sound/core.h>
> #include <sound/info.h>
> @@ -50,6 +51,22 @@
> return NULL;
> }
>
> +static struct uac3_clock_source_descriptor *
> + snd_usb_find_clock_source_v3(struct usb_host_interface *ctrl_iface,
> + int clock_id)
> +{
> + struct uac3_clock_source_descriptor *cs = NULL;
> +
> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
> + ctrl_iface->extralen,
> + cs, UAC3_CLOCK_SOURCE))) {
> + if (cs->bClockID == clock_id)
> + return cs;
> + }
> +
> + return NULL;
> +}
> +
> static struct uac_clock_selector_descriptor *
> snd_usb_find_clock_selector(struct usb_host_interface *ctrl_iface,
> int clock_id)
> @@ -66,6 +83,22 @@
> return NULL;
> }
>
> +static struct uac3_clock_selector_descriptor *
> + snd_usb_find_clock_selector_v3(struct usb_host_interface *ctrl_iface,
> + int clock_id)
> +{
> + struct uac3_clock_selector_descriptor *cs = NULL;
> +
> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
> + ctrl_iface->extralen,
> + cs, UAC3_CLOCK_SELECTOR))) {
> + if (cs->bClockID == clock_id)
> + return cs;
> + }
> +
> + return NULL;
> +}
> +
> static struct uac_clock_multiplier_descriptor *
> snd_usb_find_clock_multiplier(struct usb_host_interface *ctrl_iface,
> int clock_id)
> @@ -82,6 +115,22 @@
> return NULL;
> }
>
> +static struct uac3_clock_multiplier_descriptor *
> + snd_usb_find_clock_multiplier_v3(struct usb_host_interface *ctrl_iface,
> + int clock_id)
> +{
> + struct uac3_clock_multiplier_descriptor *cs = NULL;
> +
> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
> + ctrl_iface->extralen,
> + cs, UAC3_CLOCK_MULTIPLIER))) {
> + if (cs->bClockID == clock_id)
> + return cs;
> + }
> +
> + return NULL;
> +}
> +
> static int uac_clock_selector_get_val(struct snd_usb_audio *chip, int selector_id)
> {
> unsigned char buf;
> @@ -135,19 +184,33 @@ static int uac_clock_selector_set_val(struct snd_usb_audio *chip, int selector_i
> return ret;
> }
>
> -static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
> +static bool uac_clock_source_is_valid(struct snd_usb_audio *chip,
> + int protocol,
> + int source_id)
> {
> int err;
> unsigned char data;
> struct usb_device *dev = chip->dev;
> - struct uac_clock_source_descriptor *cs_desc =
> - snd_usb_find_clock_source(chip->ctrl_intf, source_id);
> -
> - if (!cs_desc)
> - return 0;
> + u32 bmControls;
> +
> + if (protocol == UAC_VERSION_3) {
> + struct uac3_clock_source_descriptor *cs_desc =
> + snd_usb_find_clock_source_v3(chip->ctrl_intf, source_id);
> +
> + if (!cs_desc)
> + return 0;
> + bmControls = le32_to_cpu(cs_desc->bmControls);
> + } else { /* UAC_VERSION_1/2 */
no, clock sources are only in UAC2.
> + struct uac_clock_source_descriptor *cs_desc =
> + snd_usb_find_clock_source(chip->ctrl_intf, source_id);
> +
> + if (!cs_desc)
> + return 0;
> + bmControls = cs_desc->bmControls;
> + }
>
> /* If a clock source can't tell us whether it's valid, we assume it is */
> - if (!uac2_control_is_readable(cs_desc->bmControls,
> + if (!uac_v2v3_control_is_readable(bmControls,
> UAC2_CS_CONTROL_CLOCK_VALID - 1))
> return 1;
>
> @@ -167,9 +230,8 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
> return !!data;
> }
>
> -static int __uac_clock_find_source(struct snd_usb_audio *chip,
> - int entity_id, unsigned long *visited,
> - bool validate)
> +static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id,
> + unsigned long *visited, bool validate)
> {
> struct uac_clock_source_descriptor *source;
> struct uac_clock_selector_descriptor *selector;
> @@ -188,7 +250,8 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
> source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
> if (source) {
> entity_id = source->bClockID;
> - if (validate && !uac_clock_source_is_valid(chip, entity_id)) {
> + if (validate && !uac_clock_source_is_valid(chip, UAC_VERSION_2,
> + entity_id)) {
> usb_audio_err(chip,
> "clock source %d is not valid, cannot use\n",
> entity_id);
> @@ -257,6 +320,97 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
> return -EINVAL;
> }
>
> +static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
> + unsigned long *visited, bool validate)
> +{
> + struct uac3_clock_source_descriptor *source;
> + struct uac3_clock_selector_descriptor *selector;
> + struct uac3_clock_multiplier_descriptor *multiplier;
> +
> + entity_id &= 0xff;
> +
> + if (test_and_set_bit(entity_id, visited)) {
> + usb_audio_warn(chip,
> + "%s(): recursive clock topology detected, id %d.\n",
> + __func__, entity_id);
> + return -EINVAL;
> + }
> +
> + /* first, see if the ID we're looking for is a clock source already */
> + source = snd_usb_find_clock_source_v3(chip->ctrl_intf, entity_id);
> + if (source) {
> + entity_id = source->bClockID;
> + if (validate && !uac_clock_source_is_valid(chip, UAC_VERSION_3,
> + entity_id)) {
> + usb_audio_err(chip,
> + "clock source %d is not valid, cannot use\n",
> + entity_id);
> + return -ENXIO;
> + }
> + return entity_id;
> + }
> +
> + selector = snd_usb_find_clock_selector_v3(chip->ctrl_intf, entity_id);
> + if (selector) {
> + int ret, i, cur;
> +
> + /* the entity ID we are looking for is a selector.
> + * find out what it currently selects */
> + ret = uac_clock_selector_get_val(chip, selector->bClockID);
> + if (ret < 0)
> + return ret;
> +
> + /* Selector values are one-based */
> +
> + if (ret > selector->bNrInPins || ret < 1) {
> + usb_audio_err(chip,
> + "%s(): selector reported illegal value, id %d, ret %d\n",
> + __func__, selector->bClockID, ret);
> +
> + return -EINVAL;
> + }
> +
> + cur = ret;
> + ret = __uac3_clock_find_source(chip, selector->baCSourceID[ret - 1],
> + visited, validate);
> + if (!validate || ret > 0 || !chip->autoclock)
> + return ret;
> +
> + /* The current clock source is invalid, try others. */
> + for (i = 1; i <= selector->bNrInPins; i++) {
> + int err;
> +
> + if (i == cur)
> + continue;
> +
> + ret = __uac3_clock_find_source(chip, selector->baCSourceID[i - 1],
> + visited, true);
> + if (ret < 0)
> + continue;
> +
> + err = uac_clock_selector_set_val(chip, entity_id, i);
> + if (err < 0)
> + continue;
> +
> + usb_audio_info(chip,
> + "found and selected valid clock source %d\n",
> + ret);
> + return ret;
> + }
> +
> + return -ENXIO;
> + }
> +
> + /* FIXME: multipliers only act as pass-thru element for now */
> + multiplier = snd_usb_find_clock_multiplier_v3(chip->ctrl_intf,
> + entity_id);
> + if (multiplier)
> + return __uac3_clock_find_source(chip, multiplier->bCSourceID,
> + visited, validate);
> +
> + return -EINVAL;
the difference between clock structures is not that big really between
UAC2 and UAC3 (wider bmcontrols, change to reference terminal and
wClockSourceStr_), could this code be refactored to handle both UAC2 and
UAC3?
> +}
> +
> /*
> * For all kinds of sample rate settings and other device queries,
> * the clock source (end-leaf) must be used. However, clock selectors,
> @@ -268,12 +422,22 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
> *
> * Returns the clock source UnitID (>=0) on success, or an error.
> */
> -int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id,
> - bool validate)
> +int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol,
> + int entity_id, bool validate)
> {
> DECLARE_BITMAP(visited, 256);
> memset(visited, 0, sizeof(visited));
> - return __uac_clock_find_source(chip, entity_id, visited, validate);
> +
> + switch (protocol) {
> + case UAC_VERSION_2:
> + return __uac_clock_find_source(chip, entity_id, visited,
> + validate);
> + case UAC_VERSION_3:
> + return __uac3_clock_find_source(chip, entity_id, visited,
> + validate);
this looks again very similar, could this be optimized?
> #include <sound/core.h>
> #include <sound/pcm.h>
> @@ -39,11 +40,11 @@
> * @dev: usb device
> * @fp: audioformat record
> * @format: the format tag (wFormatTag)
> - * @fmt: the format type descriptor
> + * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
> */
> static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
> struct audioformat *fp,
> - unsigned int format, void *_fmt)
> + u64 format, void *_fmt)
> {
> int sample_width, sample_bytes;
> u64 pcm_formats = 0;
> @@ -69,6 +70,17 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
> format <<= 1;
> break;
> }
> + case UAC_VERSION_3: {
> + struct uac3_as_header_descriptor *as = _fmt;
> + sample_width = as->bBitResolution;
> + sample_bytes = as->bSubslotSize;
> +
> + if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
> + pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
could this be expanded to add at least basic PCM (D0 set).
> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
> + struct audioformat *fp,
> + struct uac3_as_header_descriptor *as,
> + int stream)
> +{
> + u64 format = le64_to_cpu(as->bmFormats);
> + int err;
> +
> + /* Type I format bits are D0..D6 */
> + if (format & 0x7f)
> + fp->fmt_type = UAC_FORMAT_TYPE_I;
> + else
> + fp->fmt_type = UAC_FORMAT_TYPE_III;
maybe mention that this test only work because type IV is not supported,
otherwise this wouldn't quite right.
> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
> + struct audioformat *fp,
> + struct uac3_as_header_descriptor *as,
> + int stream);
> #endif /* __USBAUDIO_FORMAT_H */
> diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
> index 9732edf..5b5dfe4 100644
> --- a/sound/usb/mixer.c
> +++ b/sound/usb/mixer.c
> @@ -51,6 +51,7 @@
> #include <linux/usb.h>
> #include <linux/usb/audio.h>
> #include <linux/usb/audio-v2.h>
> +#include <linux/usb/audio-v3.h>
>
> #include <sound/core.h>
> #include <sound/control.h>
> @@ -189,7 +190,7 @@ static void *find_audio_control_unit(struct mixer_build *state,
> USB_DT_CS_INTERFACE)) != NULL) {
> if (hdr->bLength >= 4 &&
> hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
> - hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
> + hdr->bDescriptorSubtype <= UAC3_SAMPLE_RATE_CONVERTER &&
> hdr->bUnitID == unit)
this looks like a mistake, the definitions are
#define UAC3_SAMPLE_RATE_CONVERTER 0x0e
#define UAC3_CONNECTORS 0x0f
#define UAC3_POWER_DOMAIN 0x10
You will miss the last two with this test.
> - case UAC1_PROCESSING_UNIT:
> - case UAC1_EXTENSION_UNIT:
> - /* UAC2_PROCESSING_UNIT_V2 */
> - /* UAC2_EFFECT_UNIT */
> - case UAC2_EXTENSION_UNIT_V2: {
> - struct uac_processing_unit_descriptor *d = p1;
> -
> - if (state->mixer->protocol == UAC_VERSION_2 &&
> - hdr[2] == UAC2_EFFECT_UNIT) {
> - /* UAC2/UAC1 unit IDs overlap here in an
> - * uncompatible way. Ignore this unit for now.
> - */
> +
> + /* REVISIT: UAC3 IT doesn't have channels/cfg */
> + term->channels = 0;
> + term->chconfig = 0;
It does, but you need to get the information from the wClusterDescrID
[snip]
> +/* UAC3 device stores channels information in Cluster Descriptors */
> +static struct
> +snd_pcm_chmap_elem *convert_chmap_v3(struct uac3_cluster_header_descriptor
> + *cluster)
> +{
> + unsigned int channels = cluster->bNrChannels;
> + struct snd_pcm_chmap_elem *chmap;
> + void *p = cluster;
> + int len, c;
> +
> + if (channels > ARRAY_SIZE(chmap->map))
> + return NULL;
> +
> + chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
> + if (!chmap)
> + return NULL;
> +
> + len = le16_to_cpu(cluster->wLength);
> + c = 0;
> + p += sizeof(struct uac3_cluster_header_descriptor);
> +
> + while (((p - (void *)cluster) < len) && (c < channels)) {
> + struct uac3_cluster_segment_descriptor *cs_desc = p;
> + u16 cs_len;
> + u8 cs_type;
> +
> + cs_len = le16_to_cpu(cs_desc->wLength);
> + cs_type = cs_desc->bSegmentType;
> +
> + if (cs_type == UAC3_CHANNEL_INFORMATION) {
> + struct uac3_cluster_information_segment_descriptor *is = p;
> + unsigned char map;
> +
> + /*
> + * FIXME: this conversion is simplified, because
> + * asound.h doesn't have UAC3 values yet
yes, we need to have a mapping between USB and CEA definitions (which
are aligned to some extent btw)
> + */
> + switch (is->bChPurpose) {
> + case UAC3_CH_MONO:
> + map = SNDRV_CHMAP_MONO;
> + break;
> + case UAC3_CH_LEFT:
> + case UAC3_CH_FRONT_LEFT:
> + case UAC3_CH_SURROUND_ARRAY_LEFT:
> + map = SNDRV_CHMAP_FL;
> + break;
> + case UAC3_CH_RIGHT:
> + case UAC3_CH_FRONT_RIGHT:
> + case UAC3_CH_SURROUND_ARRAY_RIGHT:
> + map = SNDRV_CHMAP_FR;
> + break;
> + case UAC3_CH_FRONT_CENTER:
> + map = SNDRV_CHMAP_FC;
> + break;
> + case UAC3_CH_LOW_FREQUENCY_EFFECTS:
> + map = SNDRV_CHMAP_LFE;
> + break;
> + case UAC3_CH_RELATIONSHIP_UNDEFINED:
> + default:
> + map = SNDRV_CHMAP_UNKNOWN;
> + break;
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-08 14:38 ` Takashi Iwai
(?)
@ 2017-11-09 8:04 ` Greg Kroah-Hartman
2017-11-09 8:16 ` Takashi Iwai
-1 siblings, 1 reply; 18+ messages in thread
From: Greg Kroah-Hartman @ 2017-11-09 8:04 UTC (permalink / raw)
To: Takashi Iwai; +Cc: Ruslan Bilovol, alsa-devel, linux-kernel
On Wed, Nov 08, 2017 at 03:38:35PM +0100, Takashi Iwai wrote:
> On Tue, 07 Nov 2017 03:01:20 +0100,
> Ruslan Bilovol wrote:
> >
> > Recently released USB Audio Class 3.0 specification
> > introduces many significant changes comparing to
> > previous versions, like
> > - new Power Domains, support for LPM/L1
> > - new Cluster descriptor
> > - changed layout of all class-specific descriptors
> > - new High Capability descriptors
> > - New class-specific String descriptors
> > - new and removed units
> > - additional sources for interrupts
> > - removed Type II Audio Data Formats
> > - ... and many other things (check spec)
> >
> > It also provides backward compatibility through
> > multiple configurations, as well as requires
> > mandatory support for BADD (Basic Audio Device
> > Definition) on each ADC3.0 compliant device
> >
> > This patch adds initial support of UAC3 specification
> > that is enough for Generic I/O Profile (BAOF, BAIF)
> > device support from BADD document.
> >
> > Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
>
> The patch looks good, but the timing is fairly late for merging to
> 4.15.
Isn't kbuild barfing all over these? Is that because of the cross-tree
changes needed?
> So from my side, the primary question is whether the changes in USB
> (audio) header files are OK for USB guys.
>
> Greg, could you check these changes and give an ack if it's OK to
> merge? Or if you prefer postpone, just let me know.
I don't object to the USB header changes, as long as the fixes you point
out are made :)
thanks,
greg k-h
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-09 8:04 ` Greg Kroah-Hartman
@ 2017-11-09 8:16 ` Takashi Iwai
0 siblings, 0 replies; 18+ messages in thread
From: Takashi Iwai @ 2017-11-09 8:16 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Ruslan Bilovol, alsa-devel, linux-kernel
On Thu, 09 Nov 2017 09:04:58 +0100,
Greg Kroah-Hartman wrote:
>
> On Wed, Nov 08, 2017 at 03:38:35PM +0100, Takashi Iwai wrote:
> > On Tue, 07 Nov 2017 03:01:20 +0100,
> > Ruslan Bilovol wrote:
> > >
> > > Recently released USB Audio Class 3.0 specification
> > > introduces many significant changes comparing to
> > > previous versions, like
> > > - new Power Domains, support for LPM/L1
> > > - new Cluster descriptor
> > > - changed layout of all class-specific descriptors
> > > - new High Capability descriptors
> > > - New class-specific String descriptors
> > > - new and removed units
> > > - additional sources for interrupts
> > > - removed Type II Audio Data Formats
> > > - ... and many other things (check spec)
> > >
> > > It also provides backward compatibility through
> > > multiple configurations, as well as requires
> > > mandatory support for BADD (Basic Audio Device
> > > Definition) on each ADC3.0 compliant device
> > >
> > > This patch adds initial support of UAC3 specification
> > > that is enough for Generic I/O Profile (BAOF, BAIF)
> > > device support from BADD document.
> > >
> > > Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
> >
> > The patch looks good, but the timing is fairly late for merging to
> > 4.15.
>
> Isn't kbuild barfing all over these? Is that because of the cross-tree
> changes needed?
No, it's just local to the audio driver, plus a few
include/linux/usb/*.h modification / addition.
So there shouldn't be a big breakage in that regard.
> > So from my side, the primary question is whether the changes in USB
> > (audio) header files are OK for USB guys.
> >
> > Greg, could you check these changes and give an ack if it's OK to
> > merge? Or if you prefer postpone, just let me know.
>
> I don't object to the USB header changes, as long as the fixes you point
> out are made :)
Good to hear.
Could you give your acked-by once after reviewing the patch?
I think this should go through sound tree.
Thanks!
Takashi
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
@ 2017-11-09 8:16 ` Takashi Iwai
0 siblings, 0 replies; 18+ messages in thread
From: Takashi Iwai @ 2017-11-09 8:16 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: alsa-devel, Ruslan Bilovol, linux-kernel
On Thu, 09 Nov 2017 09:04:58 +0100,
Greg Kroah-Hartman wrote:
>
> On Wed, Nov 08, 2017 at 03:38:35PM +0100, Takashi Iwai wrote:
> > On Tue, 07 Nov 2017 03:01:20 +0100,
> > Ruslan Bilovol wrote:
> > >
> > > Recently released USB Audio Class 3.0 specification
> > > introduces many significant changes comparing to
> > > previous versions, like
> > > - new Power Domains, support for LPM/L1
> > > - new Cluster descriptor
> > > - changed layout of all class-specific descriptors
> > > - new High Capability descriptors
> > > - New class-specific String descriptors
> > > - new and removed units
> > > - additional sources for interrupts
> > > - removed Type II Audio Data Formats
> > > - ... and many other things (check spec)
> > >
> > > It also provides backward compatibility through
> > > multiple configurations, as well as requires
> > > mandatory support for BADD (Basic Audio Device
> > > Definition) on each ADC3.0 compliant device
> > >
> > > This patch adds initial support of UAC3 specification
> > > that is enough for Generic I/O Profile (BAOF, BAIF)
> > > device support from BADD document.
> > >
> > > Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
> >
> > The patch looks good, but the timing is fairly late for merging to
> > 4.15.
>
> Isn't kbuild barfing all over these? Is that because of the cross-tree
> changes needed?
No, it's just local to the audio driver, plus a few
include/linux/usb/*.h modification / addition.
So there shouldn't be a big breakage in that regard.
> > So from my side, the primary question is whether the changes in USB
> > (audio) header files are OK for USB guys.
> >
> > Greg, could you check these changes and give an ack if it's OK to
> > merge? Or if you prefer postpone, just let me know.
>
> I don't object to the USB header changes, as long as the fixes you point
> out are made :)
Good to hear.
Could you give your acked-by once after reviewing the patch?
I think this should go through sound tree.
Thanks!
Takashi
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-09 8:16 ` Takashi Iwai
(?)
@ 2017-11-09 8:33 ` Greg Kroah-Hartman
2017-11-09 8:58 ` Takashi Iwai
2017-11-11 2:56 ` Ruslan Bilovol
-1 siblings, 2 replies; 18+ messages in thread
From: Greg Kroah-Hartman @ 2017-11-09 8:33 UTC (permalink / raw)
To: Takashi Iwai; +Cc: Ruslan Bilovol, alsa-devel, linux-kernel
On Thu, Nov 09, 2017 at 09:16:52AM +0100, Takashi Iwai wrote:
> On Thu, 09 Nov 2017 09:04:58 +0100,
> Greg Kroah-Hartman wrote:
> >
> > On Wed, Nov 08, 2017 at 03:38:35PM +0100, Takashi Iwai wrote:
> > > On Tue, 07 Nov 2017 03:01:20 +0100,
> > > Ruslan Bilovol wrote:
> > > >
> > > > Recently released USB Audio Class 3.0 specification
> > > > introduces many significant changes comparing to
> > > > previous versions, like
> > > > - new Power Domains, support for LPM/L1
> > > > - new Cluster descriptor
> > > > - changed layout of all class-specific descriptors
> > > > - new High Capability descriptors
> > > > - New class-specific String descriptors
> > > > - new and removed units
> > > > - additional sources for interrupts
> > > > - removed Type II Audio Data Formats
> > > > - ... and many other things (check spec)
> > > >
> > > > It also provides backward compatibility through
> > > > multiple configurations, as well as requires
> > > > mandatory support for BADD (Basic Audio Device
> > > > Definition) on each ADC3.0 compliant device
> > > >
> > > > This patch adds initial support of UAC3 specification
> > > > that is enough for Generic I/O Profile (BAOF, BAIF)
> > > > device support from BADD document.
> > > >
> > > > Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
> > >
> > > The patch looks good, but the timing is fairly late for merging to
> > > 4.15.
> >
> > Isn't kbuild barfing all over these? Is that because of the cross-tree
> > changes needed?
>
> No, it's just local to the audio driver, plus a few
> include/linux/usb/*.h modification / addition.
> So there shouldn't be a big breakage in that regard.
>
>
> > > So from my side, the primary question is whether the changes in USB
> > > (audio) header files are OK for USB guys.
> > >
> > > Greg, could you check these changes and give an ack if it's OK to
> > > merge? Or if you prefer postpone, just let me know.
> >
> > I don't object to the USB header changes, as long as the fixes you point
> > out are made :)
>
> Good to hear.
> Could you give your acked-by once after reviewing the patch?
I'm guessing there will be a new patch? I'll be glad to review that
one.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-09 8:33 ` Greg Kroah-Hartman
@ 2017-11-09 8:58 ` Takashi Iwai
2017-11-11 2:56 ` Ruslan Bilovol
1 sibling, 0 replies; 18+ messages in thread
From: Takashi Iwai @ 2017-11-09 8:58 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Ruslan Bilovol, alsa-devel, linux-kernel
On Thu, 09 Nov 2017 09:33:44 +0100,
Greg Kroah-Hartman wrote:
>
> On Thu, Nov 09, 2017 at 09:16:52AM +0100, Takashi Iwai wrote:
> > On Thu, 09 Nov 2017 09:04:58 +0100,
> > Greg Kroah-Hartman wrote:
> > >
> > > On Wed, Nov 08, 2017 at 03:38:35PM +0100, Takashi Iwai wrote:
> > > > On Tue, 07 Nov 2017 03:01:20 +0100,
> > > > Ruslan Bilovol wrote:
> > > > >
> > > > > Recently released USB Audio Class 3.0 specification
> > > > > introduces many significant changes comparing to
> > > > > previous versions, like
> > > > > - new Power Domains, support for LPM/L1
> > > > > - new Cluster descriptor
> > > > > - changed layout of all class-specific descriptors
> > > > > - new High Capability descriptors
> > > > > - New class-specific String descriptors
> > > > > - new and removed units
> > > > > - additional sources for interrupts
> > > > > - removed Type II Audio Data Formats
> > > > > - ... and many other things (check spec)
> > > > >
> > > > > It also provides backward compatibility through
> > > > > multiple configurations, as well as requires
> > > > > mandatory support for BADD (Basic Audio Device
> > > > > Definition) on each ADC3.0 compliant device
> > > > >
> > > > > This patch adds initial support of UAC3 specification
> > > > > that is enough for Generic I/O Profile (BAOF, BAIF)
> > > > > device support from BADD document.
> > > > >
> > > > > Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
> > > >
> > > > The patch looks good, but the timing is fairly late for merging to
> > > > 4.15.
> > >
> > > Isn't kbuild barfing all over these? Is that because of the cross-tree
> > > changes needed?
> >
> > No, it's just local to the audio driver, plus a few
> > include/linux/usb/*.h modification / addition.
> > So there shouldn't be a big breakage in that regard.
> >
> >
> > > > So from my side, the primary question is whether the changes in USB
> > > > (audio) header files are OK for USB guys.
> > > >
> > > > Greg, could you check these changes and give an ack if it's OK to
> > > > merge? Or if you prefer postpone, just let me know.
> > >
> > > I don't object to the USB header changes, as long as the fixes you point
> > > out are made :)
> >
> > Good to hear.
> > Could you give your acked-by once after reviewing the patch?
>
> I'm guessing there will be a new patch? I'll be glad to review that
> one.
Sure, no problem.
thanks,
Takashi
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
@ 2017-11-09 8:58 ` Takashi Iwai
0 siblings, 0 replies; 18+ messages in thread
From: Takashi Iwai @ 2017-11-09 8:58 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: alsa-devel, Ruslan Bilovol, linux-kernel
On Thu, 09 Nov 2017 09:33:44 +0100,
Greg Kroah-Hartman wrote:
>
> On Thu, Nov 09, 2017 at 09:16:52AM +0100, Takashi Iwai wrote:
> > On Thu, 09 Nov 2017 09:04:58 +0100,
> > Greg Kroah-Hartman wrote:
> > >
> > > On Wed, Nov 08, 2017 at 03:38:35PM +0100, Takashi Iwai wrote:
> > > > On Tue, 07 Nov 2017 03:01:20 +0100,
> > > > Ruslan Bilovol wrote:
> > > > >
> > > > > Recently released USB Audio Class 3.0 specification
> > > > > introduces many significant changes comparing to
> > > > > previous versions, like
> > > > > - new Power Domains, support for LPM/L1
> > > > > - new Cluster descriptor
> > > > > - changed layout of all class-specific descriptors
> > > > > - new High Capability descriptors
> > > > > - New class-specific String descriptors
> > > > > - new and removed units
> > > > > - additional sources for interrupts
> > > > > - removed Type II Audio Data Formats
> > > > > - ... and many other things (check spec)
> > > > >
> > > > > It also provides backward compatibility through
> > > > > multiple configurations, as well as requires
> > > > > mandatory support for BADD (Basic Audio Device
> > > > > Definition) on each ADC3.0 compliant device
> > > > >
> > > > > This patch adds initial support of UAC3 specification
> > > > > that is enough for Generic I/O Profile (BAOF, BAIF)
> > > > > device support from BADD document.
> > > > >
> > > > > Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
> > > >
> > > > The patch looks good, but the timing is fairly late for merging to
> > > > 4.15.
> > >
> > > Isn't kbuild barfing all over these? Is that because of the cross-tree
> > > changes needed?
> >
> > No, it's just local to the audio driver, plus a few
> > include/linux/usb/*.h modification / addition.
> > So there shouldn't be a big breakage in that regard.
> >
> >
> > > > So from my side, the primary question is whether the changes in USB
> > > > (audio) header files are OK for USB guys.
> > > >
> > > > Greg, could you check these changes and give an ack if it's OK to
> > > > merge? Or if you prefer postpone, just let me know.
> > >
> > > I don't object to the USB header changes, as long as the fixes you point
> > > out are made :)
> >
> > Good to hear.
> > Could you give your acked-by once after reviewing the patch?
>
> I'm guessing there will be a new patch? I'll be glad to review that
> one.
Sure, no problem.
thanks,
Takashi
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-08 14:38 ` Takashi Iwai
(?)
(?)
@ 2017-11-10 11:12 ` Ruslan Bilovol
-1 siblings, 0 replies; 18+ messages in thread
From: Ruslan Bilovol @ 2017-11-10 11:12 UTC (permalink / raw)
To: Takashi Iwai; +Cc: alsa-devel, Greg Kroah-Hartman, linux-kernel
On Wed, Nov 8, 2017 at 4:38 PM, Takashi Iwai <tiwai@suse.de> wrote:
> On Tue, 07 Nov 2017 03:01:20 +0100,
> Ruslan Bilovol wrote:
>>
>> Recently released USB Audio Class 3.0 specification
>> introduces many significant changes comparing to
>> previous versions, like
>> - new Power Domains, support for LPM/L1
>> - new Cluster descriptor
>> - changed layout of all class-specific descriptors
>> - new High Capability descriptors
>> - New class-specific String descriptors
>> - new and removed units
>> - additional sources for interrupts
>> - removed Type II Audio Data Formats
>> - ... and many other things (check spec)
>>
>> It also provides backward compatibility through
>> multiple configurations, as well as requires
>> mandatory support for BADD (Basic Audio Device
>> Definition) on each ADC3.0 compliant device
>>
>> This patch adds initial support of UAC3 specification
>> that is enough for Generic I/O Profile (BAOF, BAIF)
>> device support from BADD document.
>>
>> Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
>
> The patch looks good, but the timing is fairly late for merging to
> 4.15.
That's OK
>
> So from my side, the primary question is whether the changes in USB
> (audio) header files are OK for USB guys.
>
> Greg, could you check these changes and give an ack if it's OK to
> merge? Or if you prefer postpone, just let me know.
>
>
> Below are some nitpicking:
>
>> --- a/include/linux/usb/audio-v2.h
>> +++ b/include/linux/usb/audio-v2.h
>> @@ -33,12 +33,12 @@
>> *
>> */
>>
>> -static inline bool uac2_control_is_readable(u32 bmControls, u8 control)
>> +static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control)
>> {
>> return (bmControls >> (control * 2)) & 0x1;
>> }
>>
>> -static inline bool uac2_control_is_writeable(u32 bmControls, u8 control)
>> +static inline bool uac_v2v3_control_is_writeable(u32 bmControls, u8 control)
>> {
>> return (bmControls >> (control * 2)) & 0x2;
>> }
>
> This change looks a bit strange, but later one I noticed the reason
> you didn't copy these functions into usb/audio-v3.h. Though, I guess
> a compiler can optimize out even if you call the same inline code
> twice for v2 and v3...
The main idea of this rename was to make code more clear.
Since with UAC3 clock handling (and many other things) still is the
same as in UAC2 but discriptor layouts and some constatns numbers
changed. So it will possible to not introduce extra comparisons
to run the same function.
On the other hand we still can use uac2 named function, but
programming becomes pure hell in this case. This is because
some part of constatns are common for UAC1 and UAC2, some
are common UAC2 and UAC3, and some are common for
all three of them. To make the code more understandable,
I tried to change common function names to see in the code
what is common.
By the way, I'll try to do it another way in this particular case
>
> In anyway, if we do rename, let's mention about it in the comment.
>
>
>> diff --git a/include/linux/usb/audio-v3.h b/include/linux/usb/audio-v3.h
>> new file mode 100644
>> index 0000000..cbbe51e
>> --- /dev/null
>> +++ b/include/linux/usb/audio-v3.h
>> @@ -0,0 +1,343 @@
>> +// SPDX-License-Identifier: GPL-2.0+
>
> You can use the C-style comment for SPDX line,
> /* SPDX-License-Identifier: GPL-2.0+ */
>
>> +static struct uac3_clock_source_descriptor *
>> + snd_usb_find_clock_source_v3(struct usb_host_interface *ctrl_iface,
>> + int clock_id)
>> +{
>> + struct uac3_clock_source_descriptor *cs = NULL;
>> +
>> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
>> + ctrl_iface->extralen,
>> + cs, UAC3_CLOCK_SOURCE))) {
>> + if (cs->bClockID == clock_id)
>> + return cs;
>> + }
>> +
>> + return NULL;
>> +}
>
> We may clean up the whole find_clock_xxx stuff later, but let's keep
> it dumb and straight for now...
>
>
>> +static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id,
>> + unsigned long *visited, bool validate)
>> +{
> (snip)
>> + /* the entity ID we are looking for is a selector.
>> + * find out what it currently selects */
>
> The multi-line comment should be properly formatted like
> /*
> * XXX
> */
Correct. I used it only because other places in clock.c has
same coding style. Will fix it.
>
>> + /* The current clock source is invalid, try others. */
>> + for (i = 1; i <= selector->bNrInPins; i++) {
>> + int err;
>> +
>> + if (i == cur)
>> + continue;
>> +
>> + ret = __uac3_clock_find_source(chip, selector->baCSourceID[i - 1],
>> + visited, true);
>> + if (ret < 0)
>> + continue;
>> +
>> + err = uac_clock_selector_set_val(chip, entity_id, i);
>> + if (err < 0)
>> + continue;
>> +
>> + usb_audio_info(chip,
>> + "found and selected valid clock source %d\n",
>> + ret);
>
> Do we need to print this at each time?
We have the same info print in UAC2 version of function, let's keep
it consistent (or change in both places)
>
>
>> static int parse_audio_format_i(struct snd_usb_audio *chip,
>> - struct audioformat *fp, unsigned int format,
>> - struct uac_format_type_i_continuous_descriptor *fmt)
>> + struct audioformat *fp, u64 format,
>> + void *_fmt)
>> {
>> snd_pcm_format_t pcm_format;
>> + unsigned int fmt_type;
>> int ret;
>>
>> - if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
>> + switch (fp->protocol) {
>> + default:
>> + case UAC_VERSION_1:
>> + case UAC_VERSION_2: {
>> + struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
>> +
>> + fmt_type = fmt->bFormatType;
>> + break;
>> + }
>> + case UAC_VERSION_3: {
>> + /* fp->fmt_type is already set in this case */
>> + fmt_type = fp->fmt_type;
>> + break;
>> + }
>> + }
>
> The double-braces don't look beautiful. And in this case it's just
> for the temporary fmt variable, so it can be moved to the top level
> and drop the internal whole braces.
Agree.
>
>
>> @@ -405,15 +435,20 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
>> */
>> switch (fp->protocol) {
>> default:
>> - case UAC_VERSION_1:
>> + case UAC_VERSION_1: {
>> + struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
>> +
>> fp->channels = fmt->bNrChannels;
>> ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
>> break;
>> + }
>> case UAC_VERSION_2:
>> + case UAC_VERSION_3: {
>> /* fp->channels is already set in this case */
>> - ret = parse_audio_format_rates_v2(chip, fp);
>> + ret = parse_audio_format_rates_v2v3(chip, fp);
>> break;
>> }
>> + }
>
> DItto.
>
>> @@ -520,3 +555,23 @@ int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
>> return 0;
>> }
>>
>> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
>> + struct audioformat *fp,
>> + struct uac3_as_header_descriptor *as,
>> + int stream)
>> +{
>> + u64 format = le64_to_cpu(as->bmFormats);
>> + int err;
>> +
>> + /* Type I format bits are D0..D6 */
>> + if (format & 0x7f)
>> + fp->fmt_type = UAC_FORMAT_TYPE_I;
>> + else
>> + fp->fmt_type = UAC_FORMAT_TYPE_III;
>> +
>> + err = parse_audio_format_i(chip, fp, format, as);
>> + if (err < 0)
>> + return err;
>> +
>> + return 0;
>
> You can simply return from parse_audio_format_i() without err check.
Agree, will fix it
>
>> @@ -460,9 +461,10 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
>>
>> validx += cval->idx_off;
>>
>> +
>
> Superfluous blank line.
Yes, somehow I missed this before submitting the patch. Will fix it
>
>> @@ -718,16 +721,104 @@ static int check_input_term(struct mixer_build *state, int id,
>> + } else { /* UAC_VERSION_2 */
>> + struct uac2_input_terminal_descriptor *d = p1;
>> +
>> + /* call recursively to verify that the
>> + * referenced clock entity is valid */
>
> Fix the comment style.
>
>> @@ -624,38 +708,158 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
>> iface_no, altno, as->bTerminalLink);
>> continue;
>> }
>> - }
>>
>> - /* get format type */
>> - fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
>> - if (!fmt) {
>> + case UAC_VERSION_3: {
>> + struct uac3_input_terminal_descriptor *input_term;
>> + struct uac3_output_terminal_descriptor *output_term;
>> + struct uac3_as_header_descriptor *as;
>> + struct uac3_cluster_header_descriptor *cluster;
>> + struct uac3_hc_descriptor_header hc_header;
>> + u16 cluster_id, wLength;
> (snip)
>
> Now snd_usb_parse_audio_interface() becomes too lengthy and hard to
> read through. It'd be great if you can split / cleanup this in
> another patch.
Okay, I'll do that.
Thanks,
Ruslan Bilovol
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [alsa-devel] [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-08 19:38 ` [alsa-devel] " Pierre-Louis Bossart
@ 2017-11-11 2:48 ` Ruslan Bilovol
2017-11-13 16:07 ` Pierre-Louis Bossart
0 siblings, 1 reply; 18+ messages in thread
From: Ruslan Bilovol @ 2017-11-11 2:48 UTC (permalink / raw)
To: Pierre-Louis Bossart
Cc: Takashi Iwai, Greg Kroah-Hartman, alsa-devel, linux-kernel
On Wed, Nov 8, 2017 at 9:38 PM, Pierre-Louis Bossart
<pierre-louis.bossart@linux.intel.com> wrote:
> Nice work, thanks! I double-checked all the descriptors and values and
> didn't find anything problematic, the main comment I have is that the clock
> source/selection could probably be refactored since the differences are
> really minor with UAC2, and there is work to do to select the right Audio
> Interface Association.
>
> On 11/6/17 8:01 PM, Ruslan Bilovol wrote:
>>
>> Recently released USB Audio Class 3.0 specification
>> introduces many significant changes comparing to
>> previous versions, like
>> - new Power Domains, support for LPM/L1
>> - new Cluster descriptor
>> - changed layout of all class-specific descriptors
>> - new High Capability descriptors
>> - New class-specific String descriptors
>> - new and removed units
>> - additional sources for interrupts
>> - removed Type II Audio Data Formats
>> - ... and many other things (check spec)
>>
>> It also provides backward compatibility through
>> multiple configurations, as well as requires
>> mandatory support for BADD (Basic Audio Device
>> Definition) on each ADC3.0 compliant device
>>
>> This patch adds initial support of UAC3 specification
>> that is enough for Generic I/O Profile (BAOF, BAIF)
>> device support from BADD document.
>
>
> Do you mean to say that the selection of the BADD profile or full-blown
> descriptor capabilities will be handled in a follow-up patch?
I have no follow-up patch for configuration switching.
I mean only that it is enough to support BAOF, BAIF profiles.
however, BAIOF profile won't work correctly, becaus it contains mixer unit
which is not supported yet in this patch.
This is because of way I use UAC3. As UAC3 device, I use an UAC3
gadget implementation which I sent before to linux-usb mailing list:
http://www.spinics.net/lists/linux-usb/msg162482.html
The UAC3 gadget implements BAOF+BAIF profile; but not BAIOF profile
which doesn't make sense in this case (there is no reason to mix Audio IN
with Audio Out)
Thus I can't implement and test UAC3 mixer handling in current patch,
so BAIOF profile isn't supported by it yet.
>
> It's my understanding from Section 3.3 that a UAC3 device is required to
> expose
> - a backwards-compatible configuration (UAC1 or UAC2),
> - a UAC3 BADD profile
> - one or more AIA compliant with UAC3 (which may have additional features
> not present in the baseline description).
My understanding of Section 3.3 is slightly different. An UAC3 device is
required to expose:
- a backward-compatible first configuration (UAC1 or UAC2)
- an UAC3 BADD profile on another configuration, with only one AIA inside
- and _may_ have one or more configurations with UAC3 support that
provide functionality beyond what is available in BADD
>
> And I am not sure how a driver would make the selection...
In order to test this patch, I created UAC2+UAC3 gadget and manually
switched to UAC3 configuration on Host by:
$ echo 2 > /sys/bus/usb/devices/1-1/bConfigurationValue
I don't think ALSA driver can make decision which configuration to select,
maybe some userspace tool can handle it, like usb_modeswitch does
for networking devices.
>
> In theory though, a UAC3 device should work out of the box even if the host
> only supports UAC1 or UAC2.
Yes, this is correct, I verified it as well.
>
>
>> +/*
>> + * v1.0, v2.0 and v3.0 of this standard have many things in common. For
>> the rest
>> + * of the definitions, please refer to audio.h and audio-v2.h
>> + */
>> +
>> +/* All High Capability descriptors have these 2 fields at the beginning
>> */
>> +struct uac3_hc_descriptor_header {
>> + __le16 wLength;
>> + __u8 bDescriptorType;
>> + __u8 bDescriptorSubtype;
>> + __le16 wDescriptorID;
>> +} __attribute__ ((packed));
>> +
>> +/* 4.3.1 CLUSTER DESCRIPTOR HEADER */
>> +struct uac3_cluster_header_descriptor {
>> + __le16 wLength;
>> + __u8 bDescriptorType;
>> + __u8 bDescriptorSubtype;
>> + __le16 wDescriptorID;
>> + __u8 bNrChannels;
>> +} __attribute__ ((packed));
>> +
>> +/* 4.3.2.1 SEGMENTS */
>> +struct uac3_cluster_segment_descriptor {
>> + __le16 wLength;
>> + __u8 bSegmentType;
>> + /* __u8[0]; segment-specific data */
>> +} __attribute__ ((packed));
>> +
>> +/* 4.3.2.1.1 END SEGMENT */
>> +struct uac3_cluster_end_segment_descriptor {
>> + __le16 wLength;
>> + __u8 bSegmentType; /* Constant END_SEGMENT */
>> +} __attribute__ ((packed));
>> +
>
>
> you didn't include the definitions in 4.3.2.1.2
> Cluster Descriptor Segment
> Vendor Defined Segment
Correct, they are not used in BADD so I didn't care much, but I can
add it in next patchset
>
>> +/* 4.3.2.1.3.1 INFORMATION SEGMENT */
>> +struct uac3_cluster_information_segment_descriptor {
>> + __le16 wLength;
>> + __u8 bSegmentType;
>
>
> this field is a CHANNEL_INFORMATION constant.
>
>> + __u8 bChPurpose;
>> + __u8 bChRelationship;
>> + __u8 bChGroupID;
>> +} __attribute__ ((packed));
>> +
>> +/* 4.5.2 CLASS-SPECIFIC AC INTERFACE DESCRIPTOR */
>> +struct uac3_ac_header_descriptor {
>> + __u8 bLength; /* 10 */
>> + __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
>> + __u8 bDescriptorSubtype; /* HEADER descriptor subtype */
>> + __u8 bCategory;
>> +
>> + /* includes Clock Source, Unit, Terminal, and Power Domain desc.
>> */
>> + __le16 wTotalLength;
>> +
>> + __le32 bmControls;
>> +} __attribute__ ((packed));
>> +
>
>
> Missing extended terminal descriptor header from 4.5.2.3.2?
>
> Missing multi-function processing unit descriptor header from 4.5.2.10.3 ?
Yes, I can add them as well.
>
>> +
>> +/* bmAttribute fields */
>> +#define UAC3_CLOCK_SOURCE_TYPE_EXT 0x0
>> +#define UAC3_CLOCK_SOURCE_TYPE_INT 0x1
>> +#define UAC3_CLOCK_SOURCE_ASYNC (0 << 2)
>> +#define UAC3_CLOCK_SOURCE_SYNCED_TO_SOF (1 << 1)
>> +
>> +/* 4.5.2.13 CLOCK SELECTOR DESCRIPTOR */
>> +struct uac3_clock_selector_descriptor {
>> + __u8 bLength;
>> + __u8 bDescriptorType;
>> + __u8 bDescriptorSubtype;
>> + __u8 bClockID;
>> + __u8 bNrInPins;
>> + __u8 baCSourceID[];
>> + /* bmControls and wCSelectorDescrStr omitted */
>
>
> why is this omitted here and not below in the clock multiplier descriptor?
That's because in this descriptor ther is variable (unknown) field baCSourceID,
so we can't define anythyng else after it as per C standard.
In the clock multiplier descriptor below we don't have such issue.
>
>> +} __attribute__((packed) > +
>> +/* 4.5.2.14 CLOCK MULTIPLIER DESCRIPTOR */
>> +struct uac3_clock_multiplier_descriptor {
>> + __u8 bLength;
>> + __u8 bDescriptorType;
>> + __u8 bDescriptorSubtype;
>> + __u8 bClockID;
>> + __u8 bCSourceID;
>> + __le32 bmControls;
>> + __le16 wCMultiplierDescrStr;
>> +} __attribute__((packed));
>
>
> [snip]
>
>> +
>> +/* 4.5.2.15 POWER DOMAIN DESCRIPTOR */
>> +struct uac3_power_domain_descriptor {
>> + __u8 bLength;
>> + __u8 bDescriptorType;
>> + __u8 bDescriptorSubtype;
>> + __u8 bPowerDomainID;
>> + __le16 waRecoveryTime1;
>> + __le16 waRecoveryTime2;
>> + __u8 bNrEntities;
>> + __u8 baEntityID[];
>> + /* wPDomainDescrStr omitted */
>
> why?
>>
>> +} __attribute__((packed));
>> +
>> +/* As above, but more useful for defining your own descriptors */
>> +#define DECLARE_UAC3_POWER_DOMAIN_DESCRIPTOR(n) \
>> +struct uac3_power_domain_descriptor_##n { \
>> + __u8 bLength; \
>> + __u8 bDescriptorType; \
>> + __u8 bDescriptorSubtype; \
>> + __u8 bPowerDomainID; \
>> + __le16 waRecoveryTime1; \
>> + __le16 waRecoveryTime2; \
>> + __u8 bNrEntities; \
>> + __u8 baEntityID[n]; \
>> + __le16 wPDomainDescrStr; \
>> +} __attribute__ ((packed))
>> +
>
>
> any specific reason why the descriptors are not added in linear order,
> following the spec definition? all the descriptors below could be added
> earlier.
That's because of way I wrote this header. These descritors are added
in same order as in UAC2 header, then it was more easy to compare
both headers in order to understand if we can reuse anything from UAC2.
If course I should reorganize it, but forgot to do :D
>
>> +/* 4.5.2.1 INPUT TERMINAL DESCRIPTOR */
>> +struct uac3_input_terminal_descriptor {
>> + __u8 bLength;
>> + __u8 bDescriptorType;
>> + __u8 bDescriptorSubtype;
>> + __u8 bTerminalID;
>> + __le16 wTerminalType;
>> + __u8 bAssocTerminal;
>> + __u8 bCSourceID;
>> + __le32 bmControls;
>> + __le16 wClusterDescrID;
>> + __le16 wExTerminalDescrID;
>> + __le16 wConnectorsDescrID;
>> + __le16 wTerminalDescrStr;
>> +} __attribute__((packed));
>> +
>
>
>> +
>> +/* 4.7.2 CLASS-SPECIFIC AS INTERFACE DESCRIPTOR */
>> +struct uac3_as_header_descriptor {
>> + __u8 bLength;
>> + __u8 bDescriptorType;
>> + __u8 bDescriptorSubtype;
>> + __u8 bTerminalLink;
>> + __le32 bmControls;
>> + __le16 wClusterDescrID;
>> + __le64 bmFormats;
>> + __u8 bSubslotSize;
>> + __u8 bBitResolution;
>> + __le16 bmAuxProtocols;
>> + __u8 bControlSize;
>> +} __attribute__((packed));
>> +
>> +#define UAC3_FORMAT_TYPE_I_RAW_DATA (1 << 6)
>
> This seems to come from Table A1 in the formats document, is it inserted
> here because of the relationship with the bmFormats? If yes, we should
> probably add the full list from Table A1 (as done below for the other codes)
Yes, this comes from Frmts3.0. However, for bits 0..5 we reuse same
values from UAC1 spec, thay are same for UAC2 as well.
See UAC_FORMAT_TYPE_xxx
>
>> +
>> +/* 4.8.1.2 CLASS-SPECIFIC AS ISOCHRONOUS AUDIO DATA ENDPOINT DESCRIPTOR
>> */
>> +struct uac3_iso_endpoint_descriptor {
>> + __u8 bLength;
>> + __u8 bDescriptorType;
>> + __u8 bDescriptorSubtype;
>> + __le32 bmControls;
>> + __u8 bLockDelayUnits;
>> + __le16 wLockDelay;
>> +} __attribute__((packed));
>> +
>> +#define UAC3_CONTROL_PITCH (3 << 0)
>> +#define UAC3_CONTROL_DATA_OVERRUN (3 << 2)
>> +#define UAC3_CONTROL_DATA_UNDERRUN (3 << 4)
>
>
> these are really masks, no?
Yes, same as in UAC2, we can drop them as they are not used yet.
>
>> +
>> +/* 6.1 INTERRUPT DATA MESSAGE */
>> +#define UAC3_INTERRUPT_DATA_MSG_VENDOR (1 << 0)
>> +#define UAC3_INTERRUPT_DATA_MSG_EP (1 << 1)
>
>
> this is the same as in UAC2
>
>> +
>> +struct uac3_interrupt_data_msg {
>> + __u8 bInfo;
>> + __u8 bSourceType;
>> + __le16 wValue;
>> + __le16 wIndex;
>> +} __attribute__((packed));
>
>
> This seems identical to UAC2, the difference being the bSourceType with
> additional values (was bAttribute).
Yes, this is correct. I made separate structure just to make code reading
easier. Same is for UAC3_INTERRUPT_DATA_xxx above.
>
>> +
>> +/* A.2 AUDIO AUDIO FUNCTION SUBCLASS CODES */
>> +#define UAC3_FUNCTION_SUBCLASS_UNDEFINED 0x00
>> +#define UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 0x01
>> +#define UAC3_FUNCTION_SUBCLASS_GENERIC_IO 0x20
>> +#define UAC3_FUNCTION_SUBCLASS_HEADPHONE 0x21
>> +#define UAC3_FUNCTION_SUBCLASS_SPEAKER 0x22
>> +#define UAC3_FUNCTION_SUBCLASS_MICROPHONE 0x23
>> +#define UAC3_FUNCTION_SUBCLASS_HEADSET 0x24
>> +#define UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER 0x25
>> +#define UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE 0x26
>
>
> mention that these are linked to BADD profiles.
OK, will do it
>
>> +
>> +/* A.7 AUDIO FUNCTION CATEGORY CODES */
>> +#define UAC3_FUNCTION_SUBCLASS_UNDEFINED 0x00
>> +#define UAC3_FUNCTION_DESKTOP_SPEAKER 0x01
>> +#define UAC3_FUNCTION_HOME_THEATER 0x02
>> +#define UAC3_FUNCTION_MICROPHONE 0x03
>> +#define UAC3_FUNCTION_HEADSET 0x04
>> +#define UAC3_FUNCTION_TELEPHONE 0x05
>> +#define UAC3_FUNCTION_CONVERTER 0x06
>> +#define UAC3_FUNCTION_SOUND_RECORDER 0x07
>> +#define UAC3_FUNCTION_IO_BOX 0x08
>> +#define UAC3_FUNCTION_MUSICAL_INSTRUMENT 0x09
>> +#define UAC3_FUNCTION_PRO_AUDIO 0x0a
>> +#define UAC3_FUNCTION_AUDIO_VIDEO 0x0b
>> +#define UAC3_FUNCTION_CONTROL_PANEL 0x0c
>> +#define UAC3_FUNCTION_HEADPHONE 0x0d
>> +#define UAC3_FUNCTION_GENERIC_SPEAKER 0x0e
>> +#define UAC3_FUNCTION_HEADSET_ADAPTER 0x0f
>> +#define UAC3_FUNCTION_SPEAKERPHONE 0x10
>> +#define UAC3_FUNCTION_OTHER 0xff
>> +
>> +/* A.8 AUDIO CLASS-SPECIFIC DESCRIPTOR TYPES */
>> +#define UAC3_CS_UNDEFINED 0x20
>> +#define UAC3_CS_DEVICE 0x21
>> +#define UAC3_CS_CONFIGURATION 0x22
>> +#define UAC3_CS_STRING 0x23
>> +#define UAC3_CS_INTERFACE 0x24
>> +#define UAC3_CS_ENDPOINT 0x25
>> +#define UAC3_CS_CLUSTER 0x26
>> +
>> +/* A.10 CLUSTER DESCRIPTOR SEGMENT TYPES */
>> +#define UAC3_SEGMENT_UNDEFINED 0x00
>> +#define UAC3_CLUSTER_DESCRIPTION 0x01
>> +#define UAC3_CLUSTER_VENDOR_DEFINED 0x1F
>> +#define UAC3_CHANNEL_INFORMATION 0x20
>> +#define UAC3_CHANNEL_AMBISONIC 0x21
>> +#define UAC3_CHANNEL_DESCRIPTION 0x22
>> +#define UAC3_CHANNEL_VENDOR_DEFINED 0xFE
>> +#define UAC3_END_SEGMENT 0xFF
>> +
>> +/* A.11 CHANNEL PURPOSE DEFINITIONS */
>> +#define UAC3_PURPOSE_UNDEFINED 0x00
>> +#define UAC3_PURPOSE_GENERIC_AUDIO 0x01
>> +#define UAC3_PURPOSE_VOICE 0x02
>> +#define UAC3_PURPOSE_SPEECH 0x03
>> +#define UAC3_PURPOSE_AMBIENT 0x04
>> +#define UAC3_PURPOSE_REFERENCE 0x05
>> +#define UAC3_PURPOSE_ULTRASONIC 0x06
>> +#define UAC3_PURPOSE_VIBROKINETIC 0x07
>> +#define UAC3_PURPOSE_NON_AUDIO 0xFF
>> +
>> +/* A.12 CHANNEL RELATIONSHIP DEFINITIONS */
>> +/* FIXME: spec is missing these constants. Few found in
>> BasicAudioDevice3.pdf */
>
>
> yes, this is a known bug in the released UAC3 document, the values were
> removed by accident. If this helps, here's what I have from the last release
> candidate, this will hopefully be corrected soon.
My next step was to send a follow-up email to usb.org about this issue,
but since you already have the answer, I'll include these values in the
next version of patch, thanks.
>
>
> RELATIONSHIP_UNDEFINED UND 0x00
> MONO M 0x01
> LEFT L 0x02
> RIGHT R 0x03
> ARRAY AR 0x04
> PATTERN_X PX 0x20
> PATTERN_Y PY 0x21
> PATTERN_A PA 0x22
> PATTERN_B PB 0x23
> PATTERN_M PM 0x24
> PATTERN_S PS 0x25
> Front Left FL 0x80
> Front Right FR 0x81
> Front Center FC 0x82
> Front Left of Center FLC 0x83
> Front Right of Center FRC 0x84
> Front Wide Left FWL 0x85
> Front Wide Right FWR 0x86
> Side Left SL 0x87
> Side Right SR 0x88
> Surround Array Left SAL 0x89
> Surround Array Right SAR 0x8A
>
> Back Left BL 0x8B
> Back Right BR 0x8C
> Back Center BC 0x8D
> Back Left of Center BLC 0x8E
> Back Right of Center BRC 0x8F
> Back Wide Left BWL 0x90
> Back Wide Right BWR 0x91
> Top Center TC 0x92
> Top Front Left TFL 0x93
> Top Front Right TFR 0x94
> Top Front Center TFC 0x95
> Top Front Left of Center TFLC 0x96
> Top Front Right of Center TFRC 0x97
> Top Front Wide Left TFWL 0x98
> Top Front Wide Right TFWR 0x99
> Top Side Left TSL 0x9A
> Top Side Right TSR 0x9B
> Top Surround Array Left TSAL 0x9C
> Top Surround Array Right TSAR 0x9D
> Top Back Left TBL 0x9E
> Top Back Right TBR 0x9F
> Top Back Center TBC 0xA0
> Top Back Left Of Center TBLC 0xA1
> Top Back Right Of Center TBRC 0xA2
> Top Back Wide Left TBWL 0xA3
> Top Back Wide Right TBWR 0xA4
> Bottom Center BC 0xA5
> Bottom Front Left BFL 0xA6
> Bottom Front Right BFR 0xA7
> Bottom Front Center BFC 0xA8
> Bottom Front Left Of Center BFLC 0xA9
> Bottom Front Right Of Center BFRC 0xAA
> Bottom Front Wide Left BFWL 0xAB
> Bottom Front Wide Right BFWR 0xAC
>
> Bottom Side Left BSL 0xAD
> Bottom Side Right BSR 0xAE
> Bottom Surround Array Left BSAL 0xAF
> Bottom Surround Array Right BSAR 0xB0
> Bottom Back Left BBL 0xB1
> Bottom Back Right BBR 0xB2
> Bottom Back Center BBC 0xB3
> Bottom Back Left Of Center BBLC 0xB4
> Bottom Back Right Of Center BBRC 0xB5
> Bottom Back Wide Left BBWL 0xB6
> Bottom Back Wide Right BBWR 0xB7
> Low Frequency Effects LFE 0xB8
> Low Frequency Effects Left LFEL 0xB9
> Low Frequency Effects Right LFER 0xBA
> Headphone Left HPL 0xBB
> Headphone Right HPR 0xBC
>
>
>> +#define UAC3_CH_RELATIONSHIP_UNDEFINED 0x00
>> +#define UAC3_CH_MONO 0x01
>> +#define UAC3_CH_LEFT 0x02
>> +#define UAC3_CH_RIGHT 0x03
>> +#define UAC3_CH_FRONT_LEFT 0x80
>> +#define UAC3_CH_FRONT_RIGHT 0x81
>> +#define UAC3_CH_FRONT_CENTER 0x82
>> +#define UAC3_CH_SURROUND_ARRAY_LEFT 0x89
>> +#define UAC3_CH_SURROUND_ARRAY_RIGHT 0x8A
>> +#define UAC3_CH_LOW_FREQUENCY_EFFECTS 0xB8
>> +
>> +/* A.15 AUDIO CLASS-SPECIFIC AC INTERFACE DESCRIPTOR SUBTYPES */
>> +/* see audio.h for the rest, which is identical to v1 */
>> +#define UAC3_EXTENDED_TERMINAL 0x04
>> +#define UAC3_MIXER_UNIT 0x05
>> +#define UAC3_SELECTOR_UNIT 0x06
>> +#define UAC3_FEATURE_UNIT 0x07
>> +#define UAC3_EFFECT_UNIT 0x08
>> +#define UAC3_PROCESSING_UNIT 0x09
>> +#define UAC3_EXTENSION_UNIT 0x0a
>> +#define UAC3_CLOCK_SOURCE 0x0b
>> +#define UAC3_CLOCK_SELECTOR 0x0c
>> +#define UAC3_CLOCK_MULTIPLIER 0x0d
>> +#define UAC3_SAMPLE_RATE_CONVERTER 0x0e
>> +#define UAC3_CONNECTORS 0x0f
>> +#define UAC3_POWER_DOMAIN 0x10
>> +
>> +/* A.22 AUDIO CLASS-SPECIFIC REQUEST CODES */
>> +#define UAC3_CS_REQ_CUR 0x01
>> +#define UAC3_CS_REQ_RANGE 0x02
>> +#define UAC3_CS_REQ_MEM 0x03
>
>
> these first 3 are already in UAC2
>
>> +#define UAC3_CS_REQ_INTEN 0x04
>> +#define UAC3_CS_REQ_STRING 0x05
>> +#define UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR 0x06
>
>
> the last 3 are really UAC3-specific
Tha'ts correct. Do you want to say we can reuse UAC2 values?
This brings an issue I described previously in this mailing list.
It is related to UAC1/2/3 specs has some common values, sometimes
use different values for same things and this makes understanding
of sources quite complex if for example we will use UAC2_xx for
UAC3 in some cases for common things but UAC3_xx for UAC3-specifc.
I see 3 solutions:
1) use UAC2_xxx for common things (hard to read/write the code, you
have to remember what is common and what is not, or leave
a comment near each such place saying it's OK to use it for UAC3
2) rename UAC2_xxx to something like UAC_V2V3_xxx, so it will be
self-explanatory
3) create UAC3_xxx for thouse things that are common with UAC2,
so no need to do either 1 or 2, but it can lead to code duplication
In this patch I did some mix of 2 and 3, but additional comments are
welcome, as it variabl naming is the hardest part of programming :)
>
>> +
>> +/* A.23.1 AUDIOCONTROL INTERFACE CONTROL SELECTORS */
>> +#define UAC3_AC_CONTROL_UNDEFINED 0x00
>> +#define UAC3_AC_ACTIVE_INTERFACE_CONTROL 0x01
>> +#define UAC3_AC_POWER_DOMAIN_CONTROL 0x02
>> +
>> +#endif /* __LINUX_USB_AUDIO_V3_H */
>> diff --git a/include/uapi/linux/usb/audio.h
>> b/include/uapi/linux/usb/audio.h
>> index a4680a5..66ec2ae 100644
>> --- a/include/uapi/linux/usb/audio.h
>> +++ b/include/uapi/linux/usb/audio.h
>> @@ -26,6 +26,7 @@
>> /* bInterfaceProtocol values to denote the version of the standard used
>> */
>> #define UAC_VERSION_1 0x00
>> #define UAC_VERSION_2 0x20
>> +#define UAC_VERSION_3 0x30
>> /* A.2 Audio Interface Subclass Codes */
>> #define USB_SUBCLASS_AUDIOCONTROL 0x01
>> diff --git a/sound/usb/card.c b/sound/usb/card.c
>> index 3dc36d9..df3f0ab 100644
>> --- a/sound/usb/card.c
>> +++ b/sound/usb/card.c
>> @@ -7,6 +7,7 @@
>> * Alan Cox (alan@lxorguk.ukuu.org.uk)
>> * Thomas Sailer (sailer@ife.ee.ethz.ch)
>> *
>> + * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
>
>
> does this mean new copyright?
That's a good qestion, I don't know the answer. Just wanted to leave
a comment about work I did for USB audio.
>
>> *
>> * This program is free software; you can redistribute it and/or
>> modify
>> * it under the terms of the GNU General Public License as published
>> by
>> @@ -44,6 +45,7 @@
>> #include <linux/mutex.h>
>> #include <linux/usb/audio.h>
>> #include <linux/usb/audio-v2.h>
>> +#include <linux/usb/audio-v3.h>
>> #include <linux/module.h>
>> #include <sound/control.h>
>> @@ -261,7 +263,8 @@ static int snd_usb_create_streams(struct snd_usb_audio
>> *chip, int ctrlif)
>> break;
>> }
>> - case UAC_VERSION_2: {
>> + case UAC_VERSION_2:
>> + case UAC_VERSION_3: {
>> struct usb_interface_assoc_descriptor *assoc =
>> usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
>> @@ -281,7 +284,7 @@ static int snd_usb_create_streams(struct
>> snd_usb_audio *chip, int ctrlif)
>> }
>> if (!assoc) {
>> - dev_err(&dev->dev, "Audio class v2 interfaces need
>> an interface association\n");
>> + dev_err(&dev->dev, "Audio class v2/v3 interfaces
>> need an interface association\n");
>
>
> yes, but they can have more than one, so how do you handle the selection
> (see 3.3)?
Current implentation of USB audio driver is to create only one ALSA
card per USB device, that works with UAC1/UAC2 and now with UAC3;
so if USB device hase more that one interface association, only first
will be used.
But if you mean configuration switching (between backward
compatible UAC1/UAC2 and UAC3 configuration) that will not limit us,
since after switching to another configuration UAC1/UAC2 interfaces
will be released and UAC3 will be probed, this is done by USB core.
As described above, currently I switching between configs manually.
>
>> return -EINVAL;
>> }
>> diff --git a/sound/usb/card.h b/sound/usb/card.h
>> index 111b0f0..5e2934f 100644
>> --- a/sound/usb/card.h
>> +++ b/sound/usb/card.h
>> @@ -21,7 +21,7 @@ struct audioformat {
>> unsigned char endpoint; /* endpoint */
>> unsigned char ep_attr; /* endpoint attributes */
>> unsigned char datainterval; /* log_2 of data packet interval
>> */
>> - unsigned char protocol; /* UAC_VERSION_1/2 */
>> + unsigned char protocol; /* UAC_VERSION_1/2/3 */
>> unsigned int maxpacksize; /* max. packet size */
>> unsigned int rates; /* rate bitmasks */
>> unsigned int rate_min, rate_max; /* min/max rates */
>> diff --git a/sound/usb/clock.c b/sound/usb/clock.c
>> index 26dd5f2..04361d7 100644
>> --- a/sound/usb/clock.c
>> +++ b/sound/usb/clock.c
>> @@ -23,6 +23,7 @@
>> #include <linux/usb.h>
>> #include <linux/usb/audio.h>
>> #include <linux/usb/audio-v2.h>
>> +#include <linux/usb/audio-v3.h>
>> #include <sound/core.h>
>> #include <sound/info.h>
>> @@ -50,6 +51,22 @@
>> return NULL;
>> }
>> +static struct uac3_clock_source_descriptor *
>> + snd_usb_find_clock_source_v3(struct usb_host_interface
>> *ctrl_iface,
>> + int clock_id)
>> +{
>> + struct uac3_clock_source_descriptor *cs = NULL;
>> +
>> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
>> + ctrl_iface->extralen,
>> + cs, UAC3_CLOCK_SOURCE))) {
>> + if (cs->bClockID == clock_id)
>> + return cs;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> static struct uac_clock_selector_descriptor *
>> snd_usb_find_clock_selector(struct usb_host_interface *ctrl_iface,
>> int clock_id)
>> @@ -66,6 +83,22 @@
>> return NULL;
>> }
>> +static struct uac3_clock_selector_descriptor *
>> + snd_usb_find_clock_selector_v3(struct usb_host_interface
>> *ctrl_iface,
>> + int clock_id)
>> +{
>> + struct uac3_clock_selector_descriptor *cs = NULL;
>> +
>> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
>> + ctrl_iface->extralen,
>> + cs, UAC3_CLOCK_SELECTOR))) {
>> + if (cs->bClockID == clock_id)
>> + return cs;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> static struct uac_clock_multiplier_descriptor *
>> snd_usb_find_clock_multiplier(struct usb_host_interface
>> *ctrl_iface,
>> int clock_id)
>> @@ -82,6 +115,22 @@
>> return NULL;
>> }
>> +static struct uac3_clock_multiplier_descriptor *
>> + snd_usb_find_clock_multiplier_v3(struct usb_host_interface
>> *ctrl_iface,
>> + int clock_id)
>> +{
>> + struct uac3_clock_multiplier_descriptor *cs = NULL;
>> +
>> + while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
>> + ctrl_iface->extralen,
>> + cs, UAC3_CLOCK_MULTIPLIER)))
>> {
>> + if (cs->bClockID == clock_id)
>> + return cs;
>> + }
>> +
>> + return NULL;
>> +}
>> +
>> static int uac_clock_selector_get_val(struct snd_usb_audio *chip, int
>> selector_id)
>> {
>> unsigned char buf;
>> @@ -135,19 +184,33 @@ static int uac_clock_selector_set_val(struct
>> snd_usb_audio *chip, int selector_i
>> return ret;
>> }
>> -static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int
>> source_id)
>> +static bool uac_clock_source_is_valid(struct snd_usb_audio *chip,
>> + int protocol,
>> + int source_id)
>> {
>> int err;
>> unsigned char data;
>> struct usb_device *dev = chip->dev;
>> - struct uac_clock_source_descriptor *cs_desc =
>> - snd_usb_find_clock_source(chip->ctrl_intf, source_id);
>> -
>> - if (!cs_desc)
>> - return 0;
>> + u32 bmControls;
>> +
>> + if (protocol == UAC_VERSION_3) {
>> + struct uac3_clock_source_descriptor *cs_desc =
>> + snd_usb_find_clock_source_v3(chip->ctrl_intf,
>> source_id);
>> +
>> + if (!cs_desc)
>> + return 0;
>> + bmControls = le32_to_cpu(cs_desc->bmControls);
>> + } else { /* UAC_VERSION_1/2 */
>
>
> no, clock sources are only in UAC2.
Correct, will fix in next patch set
>
>> + struct uac_clock_source_descriptor *cs_desc =
>> + snd_usb_find_clock_source(chip->ctrl_intf,
>> source_id);
>> +
>> + if (!cs_desc)
>> + return 0;
>> + bmControls = cs_desc->bmControls;
>> + }
>> /* If a clock source can't tell us whether it's valid, we assume
>> it is */
>> - if (!uac2_control_is_readable(cs_desc->bmControls,
>> + if (!uac_v2v3_control_is_readable(bmControls,
>> UAC2_CS_CONTROL_CLOCK_VALID - 1))
>> return 1;
>> @@ -167,9 +230,8 @@ static bool uac_clock_source_is_valid(struct
>> snd_usb_audio *chip, int source_id)
>> return !!data;
>> }
>> -static int __uac_clock_find_source(struct snd_usb_audio *chip,
>> - int entity_id, unsigned long *visited,
>> - bool validate)
>> +static int __uac_clock_find_source(struct snd_usb_audio *chip, int
>> entity_id,
>> + unsigned long *visited, bool validate)
>> {
>> struct uac_clock_source_descriptor *source;
>> struct uac_clock_selector_descriptor *selector;
>> @@ -188,7 +250,8 @@ static int __uac_clock_find_source(struct
>> snd_usb_audio *chip,
>> source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
>> if (source) {
>> entity_id = source->bClockID;
>> - if (validate && !uac_clock_source_is_valid(chip,
>> entity_id)) {
>> + if (validate && !uac_clock_source_is_valid(chip,
>> UAC_VERSION_2,
>> +
>> entity_id)) {
>> usb_audio_err(chip,
>> "clock source %d is not valid, cannot
>> use\n",
>> entity_id);
>> @@ -257,6 +320,97 @@ static int __uac_clock_find_source(struct
>> snd_usb_audio *chip,
>> return -EINVAL;
>> }
>> +static int __uac3_clock_find_source(struct snd_usb_audio *chip, int
>> entity_id,
>> + unsigned long *visited, bool validate)
>> +{
>> + struct uac3_clock_source_descriptor *source;
>> + struct uac3_clock_selector_descriptor *selector;
>> + struct uac3_clock_multiplier_descriptor *multiplier;
>> +
>> + entity_id &= 0xff;
>> +
>> + if (test_and_set_bit(entity_id, visited)) {
>> + usb_audio_warn(chip,
>> + "%s(): recursive clock topology detected, id
>> %d.\n",
>> + __func__, entity_id);
>> + return -EINVAL;
>> + }
>> +
>> + /* first, see if the ID we're looking for is a clock source
>> already */
>> + source = snd_usb_find_clock_source_v3(chip->ctrl_intf, entity_id);
>> + if (source) {
>> + entity_id = source->bClockID;
>> + if (validate && !uac_clock_source_is_valid(chip,
>> UAC_VERSION_3,
>> +
>> entity_id)) {
>> + usb_audio_err(chip,
>> + "clock source %d is not valid, cannot
>> use\n",
>> + entity_id);
>> + return -ENXIO;
>> + }
>> + return entity_id;
>> + }
>> +
>> + selector = snd_usb_find_clock_selector_v3(chip->ctrl_intf,
>> entity_id);
>> + if (selector) {
>> + int ret, i, cur;
>> +
>> + /* the entity ID we are looking for is a selector.
>> + * find out what it currently selects */
>> + ret = uac_clock_selector_get_val(chip,
>> selector->bClockID);
>> + if (ret < 0)
>> + return ret;
>> +
>> + /* Selector values are one-based */
>> +
>> + if (ret > selector->bNrInPins || ret < 1) {
>> + usb_audio_err(chip,
>> + "%s(): selector reported illegal value, id
>> %d, ret %d\n",
>> + __func__, selector->bClockID, ret);
>> +
>> + return -EINVAL;
>> + }
>> +
>> + cur = ret;
>> + ret = __uac3_clock_find_source(chip,
>> selector->baCSourceID[ret - 1],
>> + visited, validate);
>> + if (!validate || ret > 0 || !chip->autoclock)
>> + return ret;
>> +
>> + /* The current clock source is invalid, try others. */
>> + for (i = 1; i <= selector->bNrInPins; i++) {
>> + int err;
>> +
>> + if (i == cur)
>> + continue;
>> +
>> + ret = __uac3_clock_find_source(chip,
>> selector->baCSourceID[i - 1],
>> + visited, true);
>> + if (ret < 0)
>> + continue;
>> +
>> + err = uac_clock_selector_set_val(chip, entity_id,
>> i);
>> + if (err < 0)
>> + continue;
>> +
>> + usb_audio_info(chip,
>> + "found and selected valid clock source
>> %d\n",
>> + ret);
>> + return ret;
>> + }
>> +
>> + return -ENXIO;
>> + }
>> +
>> + /* FIXME: multipliers only act as pass-thru element for now */
>> + multiplier = snd_usb_find_clock_multiplier_v3(chip->ctrl_intf,
>> + entity_id);
>> + if (multiplier)
>> + return __uac3_clock_find_source(chip,
>> multiplier->bCSourceID,
>> + visited, validate);
>> +
>> + return -EINVAL;
>
>
> the difference between clock structures is not that big really between UAC2
> and UAC3 (wider bmcontrols, change to reference terminal and
> wClockSourceStr_), could this code be refactored to handle both UAC2 and
> UAC3?
Yes, that's the issue I described above. Will see what I can do here.
>
>
>> +}
>> +
>> /*
>> * For all kinds of sample rate settings and other device queries,
>> * the clock source (end-leaf) must be used. However, clock selectors,
>> @@ -268,12 +422,22 @@ static int __uac_clock_find_source(struct
>> snd_usb_audio *chip,
>> *
>> * Returns the clock source UnitID (>=0) on success, or an error.
>> */
>> -int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id,
>> - bool validate)
>> +int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol,
>> + int entity_id, bool validate)
>> {
>> DECLARE_BITMAP(visited, 256);
>> memset(visited, 0, sizeof(visited));
>> - return __uac_clock_find_source(chip, entity_id, visited,
>> validate);
>> +
>> + switch (protocol) {
>> + case UAC_VERSION_2:
>> + return __uac_clock_find_source(chip, entity_id, visited,
>> + validate);
>> + case UAC_VERSION_3:
>> + return __uac3_clock_find_source(chip, entity_id, visited,
>> + validate);
>
>
> this looks again very similar, could this be optimized?
Same here
>
>
>> #include <sound/core.h>
>> #include <sound/pcm.h>
>> @@ -39,11 +40,11 @@
>> * @dev: usb device
>> * @fp: audioformat record
>> * @format: the format tag (wFormatTag)
>> - * @fmt: the format type descriptor
>> + * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor
>> (v3)
>> */
>> static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
>> struct audioformat *fp,
>> - unsigned int format, void *_fmt)
>> + u64 format, void *_fmt)
>> {
>> int sample_width, sample_bytes;
>> u64 pcm_formats = 0;
>> @@ -69,6 +70,17 @@ static u64 parse_audio_format_i_type(struct
>> snd_usb_audio *chip,
>> format <<= 1;
>> break;
>> }
>> + case UAC_VERSION_3: {
>> + struct uac3_as_header_descriptor *as = _fmt;
>> + sample_width = as->bBitResolution;
>> + sample_bytes = as->bSubslotSize;
>> +
>> + if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
>> + pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
>
>
> could this be expanded to add at least basic PCM (D0 set).
Basic PCM, and more (D0..D5) are handled, this is needed for special
case of raw data, same as for UAC2, see commit 717bfb5 ("ALSA:
snd-usb: handle raw data format of UAC2 devices")
>
>> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
>> + struct audioformat *fp,
>> + struct uac3_as_header_descriptor *as,
>> + int stream)
>> +{
>> + u64 format = le64_to_cpu(as->bmFormats);
>> + int err;
>> +
>> + /* Type I format bits are D0..D6 */
>> + if (format & 0x7f)
>> + fp->fmt_type = UAC_FORMAT_TYPE_I;
>> + else
>> + fp->fmt_type = UAC_FORMAT_TYPE_III;
>
> maybe mention that this test only work because type IV is not supported,
> otherwise this wouldn't quite right.
Yes, will do it.
>
>> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
>> + struct audioformat *fp,
>> + struct uac3_as_header_descriptor *as,
>> + int stream);
>> #endif /* __USBAUDIO_FORMAT_H */
>> diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
>> index 9732edf..5b5dfe4 100644
>> --- a/sound/usb/mixer.c
>> +++ b/sound/usb/mixer.c
>> @@ -51,6 +51,7 @@
>> #include <linux/usb.h>
>> #include <linux/usb/audio.h>
>> #include <linux/usb/audio-v2.h>
>> +#include <linux/usb/audio-v3.h>
>> #include <sound/core.h>
>> #include <sound/control.h>
>> @@ -189,7 +190,7 @@ static void *find_audio_control_unit(struct
>> mixer_build *state,
>> USB_DT_CS_INTERFACE)) != NULL) {
>> if (hdr->bLength >= 4 &&
>> hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
>> - hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER
>> &&
>> + hdr->bDescriptorSubtype <= UAC3_SAMPLE_RATE_CONVERTER
>> &&
>> hdr->bUnitID == unit)
>
>
> this looks like a mistake, the definitions are
>
> #define UAC3_SAMPLE_RATE_CONVERTER 0x0e
> #define UAC3_CONNECTORS 0x0f
> #define UAC3_POWER_DOMAIN 0x10
>
> You will miss the last two with this test.
That's because connectors descriptor uses High Capability descriptor for
replresentation, thus it can't be compared here.
Power Domain descriptor isn't used yet by this driver, so let's check for
it once this functionality will be added.
Probably it makes sense to make this comparison UAC version depended
to not break existing UAC1/2 functionality, I'll check it.
>
>
>> - case UAC1_PROCESSING_UNIT:
>> - case UAC1_EXTENSION_UNIT:
>> - /* UAC2_PROCESSING_UNIT_V2 */
>> - /* UAC2_EFFECT_UNIT */
>> - case UAC2_EXTENSION_UNIT_V2: {
>> - struct uac_processing_unit_descriptor *d = p1;
>> -
>> - if (state->mixer->protocol == UAC_VERSION_2 &&
>> - hdr[2] == UAC2_EFFECT_UNIT) {
>> - /* UAC2/UAC1 unit IDs overlap here in an
>> - * uncompatible way. Ignore this unit for
>> now.
>> - */
>> +
>> + /* REVISIT: UAC3 IT doesn't have
>> channels/cfg */
>> + term->channels = 0;
>> + term->chconfig = 0;
>
>
> It does, but you need to get the information from the wClusterDescrID
Correct. Channels are used during mixer parsing which we don't support
yet, chconfig is set in many places but nobody uses it, so we can remove it from
usb_audio_term struct.
>
> [snip]
>
>> +/* UAC3 device stores channels information in Cluster Descriptors */
>> +static struct
>> +snd_pcm_chmap_elem *convert_chmap_v3(struct
>> uac3_cluster_header_descriptor
>> + *cluster)
>> +{
>> + unsigned int channels = cluster->bNrChannels;
>> + struct snd_pcm_chmap_elem *chmap;
>> + void *p = cluster;
>> + int len, c;
>> +
>> + if (channels > ARRAY_SIZE(chmap->map))
>> + return NULL;
>> +
>> + chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
>> + if (!chmap)
>> + return NULL;
>> +
>> + len = le16_to_cpu(cluster->wLength);
>> + c = 0;
>> + p += sizeof(struct uac3_cluster_header_descriptor);
>> +
>> + while (((p - (void *)cluster) < len) && (c < channels)) {
>> + struct uac3_cluster_segment_descriptor *cs_desc = p;
>> + u16 cs_len;
>> + u8 cs_type;
>> +
>> + cs_len = le16_to_cpu(cs_desc->wLength);
>> + cs_type = cs_desc->bSegmentType;
>> +
>> + if (cs_type == UAC3_CHANNEL_INFORMATION) {
>> + struct uac3_cluster_information_segment_descriptor
>> *is = p;
>> + unsigned char map;
>> +
>> + /*
>> + * FIXME: this conversion is simplified, because
>> + * asound.h doesn't have UAC3 values yet
>
>
>
> yes, we need to have a mapping between USB and CEA definitions (which are
> aligned to some extent btw)
>
>> + */
>> + switch (is->bChPurpose) {
>> + case UAC3_CH_MONO:
>> + map = SNDRV_CHMAP_MONO;
>> + break;
>> + case UAC3_CH_LEFT:
>> + case UAC3_CH_FRONT_LEFT:
>> + case UAC3_CH_SURROUND_ARRAY_LEFT:
>> + map = SNDRV_CHMAP_FL;
>> + break;
>> + case UAC3_CH_RIGHT:
>> + case UAC3_CH_FRONT_RIGHT:
>> + case UAC3_CH_SURROUND_ARRAY_RIGHT:
>> + map = SNDRV_CHMAP_FR;
>> + break;
>> + case UAC3_CH_FRONT_CENTER:
>> + map = SNDRV_CHMAP_FC;
>> + break;
>> + case UAC3_CH_LOW_FREQUENCY_EFFECTS:
>> + map = SNDRV_CHMAP_LFE;
>> + break;
>> + case UAC3_CH_RELATIONSHIP_UNDEFINED:
>> + default:
>> + map = SNDRV_CHMAP_UNKNOWN;
>> + break;
Best regards,
Ruslan Bilovol
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-09 8:33 ` Greg Kroah-Hartman
2017-11-09 8:58 ` Takashi Iwai
@ 2017-11-11 2:56 ` Ruslan Bilovol
2017-11-11 7:29 ` Takashi Iwai
1 sibling, 1 reply; 18+ messages in thread
From: Ruslan Bilovol @ 2017-11-11 2:56 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Takashi Iwai, alsa-devel, linux-kernel
On Thu, Nov 9, 2017 at 10:33 AM, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> On Thu, Nov 09, 2017 at 09:16:52AM +0100, Takashi Iwai wrote:
>> On Thu, 09 Nov 2017 09:04:58 +0100,
>> Greg Kroah-Hartman wrote:
>> >
>> > On Wed, Nov 08, 2017 at 03:38:35PM +0100, Takashi Iwai wrote:
>> > > On Tue, 07 Nov 2017 03:01:20 +0100,
>> > > Ruslan Bilovol wrote:
>> > > >
>> > > > Recently released USB Audio Class 3.0 specification
>> > > > introduces many significant changes comparing to
>> > > > previous versions, like
>> > > > - new Power Domains, support for LPM/L1
>> > > > - new Cluster descriptor
>> > > > - changed layout of all class-specific descriptors
>> > > > - new High Capability descriptors
>> > > > - New class-specific String descriptors
>> > > > - new and removed units
>> > > > - additional sources for interrupts
>> > > > - removed Type II Audio Data Formats
>> > > > - ... and many other things (check spec)
>> > > >
>> > > > It also provides backward compatibility through
>> > > > multiple configurations, as well as requires
>> > > > mandatory support for BADD (Basic Audio Device
>> > > > Definition) on each ADC3.0 compliant device
>> > > >
>> > > > This patch adds initial support of UAC3 specification
>> > > > that is enough for Generic I/O Profile (BAOF, BAIF)
>> > > > device support from BADD document.
>> > > >
>> > > > Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
>> > >
>> > > The patch looks good, but the timing is fairly late for merging to
>> > > 4.15.
>> >
>> > Isn't kbuild barfing all over these? Is that because of the cross-tree
>> > changes needed?
>>
>> No, it's just local to the audio driver, plus a few
>> include/linux/usb/*.h modification / addition.
>> So there shouldn't be a big breakage in that regard.
The UAC3 gadget driver (which I sent to linux-usb mailing list) depends on
a new audio-v3.h header which is a part of this patch.
So Felipe's tree will have dependency on Takashi's tree; and that's why
kbuild notifies about build failure of UAC3 gadget driver.
>>
>>
>> > > So from my side, the primary question is whether the changes in USB
>> > > (audio) header files are OK for USB guys.
>> > >
>> > > Greg, could you check these changes and give an ack if it's OK to
>> > > merge? Or if you prefer postpone, just let me know.
>> >
>> > I don't object to the USB header changes, as long as the fixes you point
>> > out are made :)
>>
>> Good to hear.
>> Could you give your acked-by once after reviewing the patch?
>
> I'm guessing there will be a new patch? I'll be glad to review that
> one.
Sure, there will be a new patch set soon.
Thanks,
Ruslan
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-11 2:56 ` Ruslan Bilovol
@ 2017-11-11 7:29 ` Takashi Iwai
0 siblings, 0 replies; 18+ messages in thread
From: Takashi Iwai @ 2017-11-11 7:29 UTC (permalink / raw)
To: Ruslan Bilovol; +Cc: Greg Kroah-Hartman, alsa-devel, linux-kernel
On Sat, 11 Nov 2017 03:56:17 +0100,
Ruslan Bilovol wrote:
>
> On Thu, Nov 9, 2017 at 10:33 AM, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> > On Thu, Nov 09, 2017 at 09:16:52AM +0100, Takashi Iwai wrote:
> >> On Thu, 09 Nov 2017 09:04:58 +0100,
> >> Greg Kroah-Hartman wrote:
> >> >
> >> > On Wed, Nov 08, 2017 at 03:38:35PM +0100, Takashi Iwai wrote:
> >> > > On Tue, 07 Nov 2017 03:01:20 +0100,
> >> > > Ruslan Bilovol wrote:
> >> > > >
> >> > > > Recently released USB Audio Class 3.0 specification
> >> > > > introduces many significant changes comparing to
> >> > > > previous versions, like
> >> > > > - new Power Domains, support for LPM/L1
> >> > > > - new Cluster descriptor
> >> > > > - changed layout of all class-specific descriptors
> >> > > > - new High Capability descriptors
> >> > > > - New class-specific String descriptors
> >> > > > - new and removed units
> >> > > > - additional sources for interrupts
> >> > > > - removed Type II Audio Data Formats
> >> > > > - ... and many other things (check spec)
> >> > > >
> >> > > > It also provides backward compatibility through
> >> > > > multiple configurations, as well as requires
> >> > > > mandatory support for BADD (Basic Audio Device
> >> > > > Definition) on each ADC3.0 compliant device
> >> > > >
> >> > > > This patch adds initial support of UAC3 specification
> >> > > > that is enough for Generic I/O Profile (BAOF, BAIF)
> >> > > > device support from BADD document.
> >> > > >
> >> > > > Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
> >> > >
> >> > > The patch looks good, but the timing is fairly late for merging to
> >> > > 4.15.
> >> >
> >> > Isn't kbuild barfing all over these? Is that because of the cross-tree
> >> > changes needed?
> >>
> >> No, it's just local to the audio driver, plus a few
> >> include/linux/usb/*.h modification / addition.
> >> So there shouldn't be a big breakage in that regard.
>
> The UAC3 gadget driver (which I sent to linux-usb mailing list) depends on
> a new audio-v3.h header which is a part of this patch.
>
> So Felipe's tree will have dependency on Takashi's tree; and that's why
> kbuild notifies about build failure of UAC3 gadget driver.
OK, I see. I can prepare an immutable branch once when the patches
are ready to merge.
Takashi
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [alsa-devel] [PATCH 1/1] ALSA: usb: initial USB Audio Device Class 3.0 support
2017-11-11 2:48 ` Ruslan Bilovol
@ 2017-11-13 16:07 ` Pierre-Louis Bossart
0 siblings, 0 replies; 18+ messages in thread
From: Pierre-Louis Bossart @ 2017-11-13 16:07 UTC (permalink / raw)
To: Ruslan Bilovol; +Cc: Takashi Iwai, Greg Kroah-Hartman, alsa-devel, linux-kernel
On 11/10/17 8:48 PM, Ruslan Bilovol wrote:
> On Wed, Nov 8, 2017 at 9:38 PM, Pierre-Louis Bossart
> <pierre-louis.bossart@linux.intel.com> wrote:
>> Nice work, thanks! I double-checked all the descriptors and values and
>> didn't find anything problematic, the main comment I have is that the clock
>> source/selection could probably be refactored since the differences are
>> really minor with UAC2, and there is work to do to select the right Audio
>> Interface Association.
>>
>> On 11/6/17 8:01 PM, Ruslan Bilovol wrote:
>>>
>>> Recently released USB Audio Class 3.0 specification
>>> introduces many significant changes comparing to
>>> previous versions, like
>>> - new Power Domains, support for LPM/L1
>>> - new Cluster descriptor
>>> - changed layout of all class-specific descriptors
>>> - new High Capability descriptors
>>> - New class-specific String descriptors
>>> - new and removed units
>>> - additional sources for interrupts
>>> - removed Type II Audio Data Formats
>>> - ... and many other things (check spec)
>>>
>>> It also provides backward compatibility through
>>> multiple configurations, as well as requires
>>> mandatory support for BADD (Basic Audio Device
>>> Definition) on each ADC3.0 compliant device
>>>
>>> This patch adds initial support of UAC3 specification
>>> that is enough for Generic I/O Profile (BAOF, BAIF)
>>> device support from BADD document.
>>
>>
>> Do you mean to say that the selection of the BADD profile or full-blown
>> descriptor capabilities will be handled in a follow-up patch?
>
> I have no follow-up patch for configuration switching.
> I mean only that it is enough to support BAOF, BAIF profiles.
> however, BAIOF profile won't work correctly, becaus it contains mixer unit
> which is not supported yet in this patch.
>
> This is because of way I use UAC3. As UAC3 device, I use an UAC3
> gadget implementation which I sent before to linux-usb mailing list:
> http://www.spinics.net/lists/linux-usb/msg162482.html
>
> The UAC3 gadget implements BAOF+BAIF profile; but not BAIOF profile
> which doesn't make sense in this case (there is no reason to mix Audio IN
> with Audio Out)
sidetone is the main reason for mixing input on output, very useful too
avoid speaking too loudly into the mic or when you use well-insulated
headsets. most USB headsets provide this capability.
>
> Thus I can't implement and test UAC3 mixer handling in current patch,
> so BAIOF profile isn't supported by it yet.
>
>>
>> It's my understanding from Section 3.3 that a UAC3 device is required to
>> expose
>> - a backwards-compatible configuration (UAC1 or UAC2),
>> - a UAC3 BADD profile
>> - one or more AIA compliant with UAC3 (which may have additional features
>> not present in the baseline description).
>
> My understanding of Section 3.3 is slightly different. An UAC3 device is
> required to expose:
> - a backward-compatible first configuration (UAC1 or UAC2)
> - an UAC3 BADD profile on another configuration, with only one AIA inside
> - and _may_ have one or more configurations with UAC3 support that
> provide functionality beyond what is available in BADD
yes, i should have written 0 or more AIA compliant with UAC3
>
>>
>> And I am not sure how a driver would make the selection...
>
> In order to test this patch, I created UAC2+UAC3 gadget and manually
> switched to UAC3 configuration on Host by:
> $ echo 2 > /sys/bus/usb/devices/1-1/bConfigurationValue
>
> I don't think ALSA driver can make decision which configuration to select,
> maybe some userspace tool can handle it, like usb_modeswitch does
> for networking devices.
The BADD profiles were intended to provide a basic descriptors for hosts
that couldn't handle descriptor parsing. That was a very controversial
work item, since both the Linux and Windows stacks can parse descriptors
the usefulness of BADD profiles remains questionable.
I think at some point we should have the following policy
if one UAC3 is available, use the first one
else
if there is a BADD profile use it
else
fall back to UAC1/2
I don't see how a user will ever choose between multiple UAC3
configurations, should they ever exist, except maybe by trial and error.
>
>>
>> In theory though, a UAC3 device should work out of the box even if the host
>> only supports UAC1 or UAC2.
>
> Yes, this is correct, I verified it as well.
>
>>
>>
>>> +/*
>>> + * v1.0, v2.0 and v3.0 of this standard have many things in common. For
>>> the rest
>>> + * of the definitions, please refer to audio.h and audio-v2.h
>>> + */
>>> +
>>> +/* All High Capability descriptors have these 2 fields at the beginning
>>> */
>>> +struct uac3_hc_descriptor_header {
>>> + __le16 wLength;
>>> + __u8 bDescriptorType;
>>> + __u8 bDescriptorSubtype;
>>> + __le16 wDescriptorID;
>>> +} __attribute__ ((packed));
>>> +
>>> +/* 4.3.1 CLUSTER DESCRIPTOR HEADER */
>>> +struct uac3_cluster_header_descriptor {
>>> + __le16 wLength;
>>> + __u8 bDescriptorType;
>>> + __u8 bDescriptorSubtype;
>>> + __le16 wDescriptorID;
>>> + __u8 bNrChannels;
>>> +} __attribute__ ((packed));
>>> +
>>> +/* 4.3.2.1 SEGMENTS */
>>> +struct uac3_cluster_segment_descriptor {
>>> + __le16 wLength;
>>> + __u8 bSegmentType;
>>> + /* __u8[0]; segment-specific data */
>>> +} __attribute__ ((packed));
>>> +
>>> +/* 4.3.2.1.1 END SEGMENT */
>>> +struct uac3_cluster_end_segment_descriptor {
>>> + __le16 wLength;
>>> + __u8 bSegmentType; /* Constant END_SEGMENT */
>>> +} __attribute__ ((packed));
>>> +
>>
>>
>> you didn't include the definitions in 4.3.2.1.2
>> Cluster Descriptor Segment
>> Vendor Defined Segment
>
> Correct, they are not used in BADD so I didn't care much, but I can
> add it in next patchset
ok
>
>>
>>> +/* 4.3.2.1.3.1 INFORMATION SEGMENT */
>>> +struct uac3_cluster_information_segment_descriptor {
>>> + __le16 wLength;
>>> + __u8 bSegmentType;
>>
>>
>> this field is a CHANNEL_INFORMATION constant.
>>
>>> + __u8 bChPurpose;
>>> + __u8 bChRelationship;
>>> + __u8 bChGroupID;
>>> +} __attribute__ ((packed));
>>> +
>>> +/* 4.5.2 CLASS-SPECIFIC AC INTERFACE DESCRIPTOR */
>>> +struct uac3_ac_header_descriptor {
>>> + __u8 bLength; /* 10 */
>>> + __u8 bDescriptorType; /* CS_INTERFACE descriptor type */
>>> + __u8 bDescriptorSubtype; /* HEADER descriptor subtype */
>>> + __u8 bCategory;
>>> +
>>> + /* includes Clock Source, Unit, Terminal, and Power Domain desc.
>>> */
>>> + __le16 wTotalLength;
>>> +
>>> + __le32 bmControls;
>>> +} __attribute__ ((packed));
>>> +
>>
>>
>> Missing extended terminal descriptor header from 4.5.2.3.2?
>>
>> Missing multi-function processing unit descriptor header from 4.5.2.10.3 ?
>
> Yes, I can add them as well.
ok
>
>>
>>> +
>>> +/* bmAttribute fields */
>>> +#define UAC3_CLOCK_SOURCE_TYPE_EXT 0x0
>>> +#define UAC3_CLOCK_SOURCE_TYPE_INT 0x1
>>> +#define UAC3_CLOCK_SOURCE_ASYNC (0 << 2)
>>> +#define UAC3_CLOCK_SOURCE_SYNCED_TO_SOF (1 << 1)
>>> +
>>> +/* 4.5.2.13 CLOCK SELECTOR DESCRIPTOR */
>>> +struct uac3_clock_selector_descriptor {
>>> + __u8 bLength;
>>> + __u8 bDescriptorType;
>>> + __u8 bDescriptorSubtype;
>>> + __u8 bClockID;
>>> + __u8 bNrInPins;
>>> + __u8 baCSourceID[];
>>> + /* bmControls and wCSelectorDescrStr omitted */
>>
>>
>> why is this omitted here and not below in the clock multiplier descriptor?
>
> That's because in this descriptor ther is variable (unknown) field baCSourceID,
> so we can't define anythyng else after it as per C standard.
> In the clock multiplier descriptor below we don't have such issue.
ah, then maybe explain it, I wasn't sure if there was a technical reason
or a filter you applied for some other reason.
>
>>
>>> +} __attribute__((packed) > +
>>> +/* 4.5.2.14 CLOCK MULTIPLIER DESCRIPTOR */
>>> +struct uac3_clock_multiplier_descriptor {
>>> + __u8 bLength;
>>> + __u8 bDescriptorType;
>>> + __u8 bDescriptorSubtype;
>>> + __u8 bClockID;
>>> + __u8 bCSourceID;
>>> + __le32 bmControls;
>>> + __le16 wCMultiplierDescrStr;
>>> +} __attribute__((packed));
>>
>>
>> [snip]
>>
>>> +
>>> +/* 4.5.2.15 POWER DOMAIN DESCRIPTOR */
>>> +struct uac3_power_domain_descriptor {
>>> + __u8 bLength;
>>> + __u8 bDescriptorType;
>>> + __u8 bDescriptorSubtype;
>>> + __u8 bPowerDomainID;
>>> + __le16 waRecoveryTime1;
>>> + __le16 waRecoveryTime2;
>>> + __u8 bNrEntities;
>>> + __u8 baEntityID[];
>>> + /* wPDomainDescrStr omitted */
>>
>> why?
>>>
>>> +} __attribute__((packed));
>>> +
>>> +/* As above, but more useful for defining your own descriptors */
>>> +#define DECLARE_UAC3_POWER_DOMAIN_DESCRIPTOR(n) \
>>> +struct uac3_power_domain_descriptor_##n { \
>>> + __u8 bLength; \
>>> + __u8 bDescriptorType; \
>>> + __u8 bDescriptorSubtype; \
>>> + __u8 bPowerDomainID; \
>>> + __le16 waRecoveryTime1; \
>>> + __le16 waRecoveryTime2; \
>>> + __u8 bNrEntities; \
>>> + __u8 baEntityID[n]; \
>>> + __le16 wPDomainDescrStr; \
>>> +} __attribute__ ((packed))
>>> +
>>
>>
>> any specific reason why the descriptors are not added in linear order,
>> following the spec definition? all the descriptors below could be added
>> earlier.
>
> That's because of way I wrote this header. These descritors are added
> in same order as in UAC2 header, then it was more easy to compare
> both headers in order to understand if we can reuse anything from UAC2.
>
> If course I should reorganize it, but forgot to do :D
I don't know why this was modified, we should have kept the initial
order in the spec when possible.
>
>>
>>> +/* 4.5.2.1 INPUT TERMINAL DESCRIPTOR */
>>> +struct uac3_input_terminal_descriptor {
>>> + __u8 bLength;
>>> + __u8 bDescriptorType;
>>> + __u8 bDescriptorSubtype;
>>> + __u8 bTerminalID;
>>> + __le16 wTerminalType;
>>> + __u8 bAssocTerminal;
>>> + __u8 bCSourceID;
>>> + __le32 bmControls;
>>> + __le16 wClusterDescrID;
>>> + __le16 wExTerminalDescrID;
>>> + __le16 wConnectorsDescrID;
>>> + __le16 wTerminalDescrStr;
>>> +} __attribute__((packed));
>>> +
>>
>>
>>> +
>>> +/* 4.7.2 CLASS-SPECIFIC AS INTERFACE DESCRIPTOR */
>>> +struct uac3_as_header_descriptor {
>>> + __u8 bLength;
>>> + __u8 bDescriptorType;
>>> + __u8 bDescriptorSubtype;
>>> + __u8 bTerminalLink;
>>> + __le32 bmControls;
>>> + __le16 wClusterDescrID;
>>> + __le64 bmFormats;
>>> + __u8 bSubslotSize;
>>> + __u8 bBitResolution;
>>> + __le16 bmAuxProtocols;
>>> + __u8 bControlSize;
>>> +} __attribute__((packed));
>>> +
>>> +#define UAC3_FORMAT_TYPE_I_RAW_DATA (1 << 6)
>>
>> This seems to come from Table A1 in the formats document, is it inserted
>> here because of the relationship with the bmFormats? If yes, we should
>> probably add the full list from Table A1 (as done below for the other codes)
>
> Yes, this comes from Frmts3.0. However, for bits 0..5 we reuse same
> values from UAC1 spec, thay are same for UAC2 as well.
> See UAC_FORMAT_TYPE_xxx
yes
>
>>
>>> +
>>> +/* 4.8.1.2 CLASS-SPECIFIC AS ISOCHRONOUS AUDIO DATA ENDPOINT DESCRIPTOR
>>> */
>>> +struct uac3_iso_endpoint_descriptor {
>>> + __u8 bLength;
>>> + __u8 bDescriptorType;
>>> + __u8 bDescriptorSubtype;
>>> + __le32 bmControls;
>>> + __u8 bLockDelayUnits;
>>> + __le16 wLockDelay;
>>> +} __attribute__((packed));
>>> +
>>> +#define UAC3_CONTROL_PITCH (3 << 0)
>>> +#define UAC3_CONTROL_DATA_OVERRUN (3 << 2)
>>> +#define UAC3_CONTROL_DATA_UNDERRUN (3 << 4)
>>
>>
>> these are really masks, no?
>
> Yes, same as in UAC2, we can drop them as they are not used yet.
ok
>
>>
>>> +
>>> +/* 6.1 INTERRUPT DATA MESSAGE */
>>> +#define UAC3_INTERRUPT_DATA_MSG_VENDOR (1 << 0)
>>> +#define UAC3_INTERRUPT_DATA_MSG_EP (1 << 1)
>>
>>
>> this is the same as in UAC2
>>
>>> +
>>> +struct uac3_interrupt_data_msg {
>>> + __u8 bInfo;
>>> + __u8 bSourceType;
>>> + __le16 wValue;
>>> + __le16 wIndex;
>>> +} __attribute__((packed));
>>
>>
>> This seems identical to UAC2, the difference being the bSourceType with
>> additional values (was bAttribute).
>
> Yes, this is correct. I made separate structure just to make code reading
> easier. Same is for UAC3_INTERRUPT_DATA_xxx above.
ok. maybe just mention that this is for readability
>
>>
>>> +
>>> +/* A.2 AUDIO AUDIO FUNCTION SUBCLASS CODES */
>>> +#define UAC3_FUNCTION_SUBCLASS_UNDEFINED 0x00
>>> +#define UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 0x01
>>> +#define UAC3_FUNCTION_SUBCLASS_GENERIC_IO 0x20
>>> +#define UAC3_FUNCTION_SUBCLASS_HEADPHONE 0x21
>>> +#define UAC3_FUNCTION_SUBCLASS_SPEAKER 0x22
>>> +#define UAC3_FUNCTION_SUBCLASS_MICROPHONE 0x23
>>> +#define UAC3_FUNCTION_SUBCLASS_HEADSET 0x24
>>> +#define UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER 0x25
>>> +#define UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE 0x26
>>
>>
>> mention that these are linked to BADD profiles.
>
> OK, will do it
>
>>
>>> +
>>> +/* A.7 AUDIO FUNCTION CATEGORY CODES */
>>> +#define UAC3_FUNCTION_SUBCLASS_UNDEFINED 0x00
>>> +#define UAC3_FUNCTION_DESKTOP_SPEAKER 0x01
>>> +#define UAC3_FUNCTION_HOME_THEATER 0x02
>>> +#define UAC3_FUNCTION_MICROPHONE 0x03
>>> +#define UAC3_FUNCTION_HEADSET 0x04
>>> +#define UAC3_FUNCTION_TELEPHONE 0x05
>>> +#define UAC3_FUNCTION_CONVERTER 0x06
>>> +#define UAC3_FUNCTION_SOUND_RECORDER 0x07
>>> +#define UAC3_FUNCTION_IO_BOX 0x08
>>> +#define UAC3_FUNCTION_MUSICAL_INSTRUMENT 0x09
>>> +#define UAC3_FUNCTION_PRO_AUDIO 0x0a
>>> +#define UAC3_FUNCTION_AUDIO_VIDEO 0x0b
>>> +#define UAC3_FUNCTION_CONTROL_PANEL 0x0c
>>> +#define UAC3_FUNCTION_HEADPHONE 0x0d
>>> +#define UAC3_FUNCTION_GENERIC_SPEAKER 0x0e
>>> +#define UAC3_FUNCTION_HEADSET_ADAPTER 0x0f
>>> +#define UAC3_FUNCTION_SPEAKERPHONE 0x10
>>> +#define UAC3_FUNCTION_OTHER 0xff
>>> +
>>> +/* A.8 AUDIO CLASS-SPECIFIC DESCRIPTOR TYPES */
>>> +#define UAC3_CS_UNDEFINED 0x20
>>> +#define UAC3_CS_DEVICE 0x21
>>> +#define UAC3_CS_CONFIGURATION 0x22
>>> +#define UAC3_CS_STRING 0x23
>>> +#define UAC3_CS_INTERFACE 0x24
>>> +#define UAC3_CS_ENDPOINT 0x25
>>> +#define UAC3_CS_CLUSTER 0x26
>>> +
>>> +/* A.10 CLUSTER DESCRIPTOR SEGMENT TYPES */
>>> +#define UAC3_SEGMENT_UNDEFINED 0x00
>>> +#define UAC3_CLUSTER_DESCRIPTION 0x01
>>> +#define UAC3_CLUSTER_VENDOR_DEFINED 0x1F
>>> +#define UAC3_CHANNEL_INFORMATION 0x20
>>> +#define UAC3_CHANNEL_AMBISONIC 0x21
>>> +#define UAC3_CHANNEL_DESCRIPTION 0x22
>>> +#define UAC3_CHANNEL_VENDOR_DEFINED 0xFE
>>> +#define UAC3_END_SEGMENT 0xFF
>>> +
>>> +/* A.11 CHANNEL PURPOSE DEFINITIONS */
>>> +#define UAC3_PURPOSE_UNDEFINED 0x00
>>> +#define UAC3_PURPOSE_GENERIC_AUDIO 0x01
>>> +#define UAC3_PURPOSE_VOICE 0x02
>>> +#define UAC3_PURPOSE_SPEECH 0x03
>>> +#define UAC3_PURPOSE_AMBIENT 0x04
>>> +#define UAC3_PURPOSE_REFERENCE 0x05
>>> +#define UAC3_PURPOSE_ULTRASONIC 0x06
>>> +#define UAC3_PURPOSE_VIBROKINETIC 0x07
>>> +#define UAC3_PURPOSE_NON_AUDIO 0xFF
>>> +
>>> +/* A.12 CHANNEL RELATIONSHIP DEFINITIONS */
>>> +/* FIXME: spec is missing these constants. Few found in
>>> BasicAudioDevice3.pdf */
>>
>>
>> yes, this is a known bug in the released UAC3 document, the values were
>> removed by accident. If this helps, here's what I have from the last release
>> candidate, this will hopefully be corrected soon.
>
> My next step was to send a follow-up email to usb.org about this issue,
> but since you already have the answer, I'll include these values in the
> next version of patch, thanks.
It doesn't hurt to provide feedback to USB since it'll show the need for
a spec update.
[snip]
>>
>>
>>> +#define UAC3_CH_RELATIONSHIP_UNDEFINED 0x00
>>> +#define UAC3_CH_MONO 0x01
>>> +#define UAC3_CH_LEFT 0x02
>>> +#define UAC3_CH_RIGHT 0x03
>>> +#define UAC3_CH_FRONT_LEFT 0x80
>>> +#define UAC3_CH_FRONT_RIGHT 0x81
>>> +#define UAC3_CH_FRONT_CENTER 0x82
>>> +#define UAC3_CH_SURROUND_ARRAY_LEFT 0x89
>>> +#define UAC3_CH_SURROUND_ARRAY_RIGHT 0x8A
>>> +#define UAC3_CH_LOW_FREQUENCY_EFFECTS 0xB8
>>> +
>>> +/* A.15 AUDIO CLASS-SPECIFIC AC INTERFACE DESCRIPTOR SUBTYPES */
>>> +/* see audio.h for the rest, which is identical to v1 */
>>> +#define UAC3_EXTENDED_TERMINAL 0x04
>>> +#define UAC3_MIXER_UNIT 0x05
>>> +#define UAC3_SELECTOR_UNIT 0x06
>>> +#define UAC3_FEATURE_UNIT 0x07
>>> +#define UAC3_EFFECT_UNIT 0x08
>>> +#define UAC3_PROCESSING_UNIT 0x09
>>> +#define UAC3_EXTENSION_UNIT 0x0a
>>> +#define UAC3_CLOCK_SOURCE 0x0b
>>> +#define UAC3_CLOCK_SELECTOR 0x0c
>>> +#define UAC3_CLOCK_MULTIPLIER 0x0d
>>> +#define UAC3_SAMPLE_RATE_CONVERTER 0x0e
>>> +#define UAC3_CONNECTORS 0x0f
>>> +#define UAC3_POWER_DOMAIN 0x10
>>> +
>>> +/* A.22 AUDIO CLASS-SPECIFIC REQUEST CODES */
>>> +#define UAC3_CS_REQ_CUR 0x01
>>> +#define UAC3_CS_REQ_RANGE 0x02
>>> +#define UAC3_CS_REQ_MEM 0x03
>>
>>
>> these first 3 are already in UAC2
>>
>>> +#define UAC3_CS_REQ_INTEN 0x04
>>> +#define UAC3_CS_REQ_STRING 0x05
>>> +#define UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR 0x06
>>
>>
>> the last 3 are really UAC3-specific
>
> Tha'ts correct. Do you want to say we can reuse UAC2 values?
> This brings an issue I described previously in this mailing list.
> It is related to UAC1/2/3 specs has some common values, sometimes
> use different values for same things and this makes understanding
> of sources quite complex if for example we will use UAC2_xx for
> UAC3 in some cases for common things but UAC3_xx for UAC3-specifc.
>
> I see 3 solutions:
> 1) use UAC2_xxx for common things (hard to read/write the code, you
> have to remember what is common and what is not, or leave
> a comment near each such place saying it's OK to use it for UAC3
> 2) rename UAC2_xxx to something like UAC_V2V3_xxx, so it will be
> self-explanatory
I vote for this option.
> 3) create UAC3_xxx for thouse things that are common with UAC2,
> so no need to do either 1 or 2, but it can lead to code duplication
>
> In this patch I did some mix of 2 and 3, but additional comments are
> welcome, as it variabl naming is the hardest part of programming :)
>>
>>> +
>>> +/* A.23.1 AUDIOCONTROL INTERFACE CONTROL SELECTORS */
>>> +#define UAC3_AC_CONTROL_UNDEFINED 0x00
>>> +#define UAC3_AC_ACTIVE_INTERFACE_CONTROL 0x01
>>> +#define UAC3_AC_POWER_DOMAIN_CONTROL 0x02
>>> +
>>> +#endif /* __LINUX_USB_AUDIO_V3_H */
>>> diff --git a/include/uapi/linux/usb/audio.h
>>> b/include/uapi/linux/usb/audio.h
>>> index a4680a5..66ec2ae 100644
>>> --- a/include/uapi/linux/usb/audio.h
>>> +++ b/include/uapi/linux/usb/audio.h
>>> @@ -26,6 +26,7 @@
>>> /* bInterfaceProtocol values to denote the version of the standard used
>>> */
>>> #define UAC_VERSION_1 0x00
>>> #define UAC_VERSION_2 0x20
>>> +#define UAC_VERSION_3 0x30
>>> /* A.2 Audio Interface Subclass Codes */
>>> #define USB_SUBCLASS_AUDIOCONTROL 0x01
>>> diff --git a/sound/usb/card.c b/sound/usb/card.c
>>> index 3dc36d9..df3f0ab 100644
>>> --- a/sound/usb/card.c
>>> +++ b/sound/usb/card.c
>>> @@ -7,6 +7,7 @@
>>> * Alan Cox (alan@lxorguk.ukuu.org.uk)
>>> * Thomas Sailer (sailer@ife.ee.ethz.ch)
>>> *
>>> + * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
>>
>>
>> does this mean new copyright?
>
> That's a good qestion, I don't know the answer. Just wanted to leave
> a comment about work I did for USB audio.
Don't know the answer either.
>
>>
>>> *
>>> * This program is free software; you can redistribute it and/or
>>> modify
>>> * it under the terms of the GNU General Public License as published
>>> by
>>> @@ -44,6 +45,7 @@
>>> #include <linux/mutex.h>
>>> #include <linux/usb/audio.h>
>>> #include <linux/usb/audio-v2.h>
>>> +#include <linux/usb/audio-v3.h>
>>> #include <linux/module.h>
>>> #include <sound/control.h>
>>> @@ -261,7 +263,8 @@ static int snd_usb_create_streams(struct snd_usb_audio
>>> *chip, int ctrlif)
>>> break;
>>> }
>>> - case UAC_VERSION_2: {
>>> + case UAC_VERSION_2:
>>> + case UAC_VERSION_3: {
>>> struct usb_interface_assoc_descriptor *assoc =
>>> usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
>>> @@ -281,7 +284,7 @@ static int snd_usb_create_streams(struct
>>> snd_usb_audio *chip, int ctrlif)
>>> }
>>> if (!assoc) {
>>> - dev_err(&dev->dev, "Audio class v2 interfaces need
>>> an interface association\n");
>>> + dev_err(&dev->dev, "Audio class v2/v3 interfaces
>>> need an interface association\n");
>>
>>
>> yes, but they can have more than one, so how do you handle the selection
>> (see 3.3)?
>
> Current implentation of USB audio driver is to create only one ALSA
> card per USB device, that works with UAC1/UAC2 and now with UAC3;
> so if USB device hase more that one interface association, only first
> will be used.
>
> But if you mean configuration switching (between backward
> compatible UAC1/UAC2 and UAC3 configuration) that will not limit us,
> since after switching to another configuration UAC1/UAC2 interfaces
> will be released and UAC3 will be probed, this is done by USB core.
>
> As described above, currently I switching between configs manually.
My hope is that we can have a basic policy to select the configurations,
as detailed above.
[snip]
>
>>
>>
>>> #include <sound/core.h>
>>> #include <sound/pcm.h>
>>> @@ -39,11 +40,11 @@
>>> * @dev: usb device
>>> * @fp: audioformat record
>>> * @format: the format tag (wFormatTag)
>>> - * @fmt: the format type descriptor
>>> + * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor
>>> (v3)
>>> */
>>> static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
>>> struct audioformat *fp,
>>> - unsigned int format, void *_fmt)
>>> + u64 format, void *_fmt)
>>> {
>>> int sample_width, sample_bytes;
>>> u64 pcm_formats = 0;
>>> @@ -69,6 +70,17 @@ static u64 parse_audio_format_i_type(struct
>>> snd_usb_audio *chip,
>>> format <<= 1;
>>> break;
>>> }
>>> + case UAC_VERSION_3: {
>>> + struct uac3_as_header_descriptor *as = _fmt;
>>> + sample_width = as->bBitResolution;
>>> + sample_bytes = as->bSubslotSize;
>>> +
>>> + if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
>>> + pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
>>
>>
>> could this be expanded to add at least basic PCM (D0 set).
>
> Basic PCM, and more (D0..D5) are handled, this is needed for special
> case of raw data, same as for UAC2, see commit 717bfb5 ("ALSA:
> snd-usb: handle raw data format of UAC2 devices")
I don't get this one, you are only handing D6 here? where is D0..D5 handled?
>
>>
>>> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
>>> + struct audioformat *fp,
>>> + struct uac3_as_header_descriptor *as,
>>> + int stream)
>>> +{
>>> + u64 format = le64_to_cpu(as->bmFormats);
>>> + int err;
>>> +
>>> + /* Type I format bits are D0..D6 */
>>> + if (format & 0x7f)
>>> + fp->fmt_type = UAC_FORMAT_TYPE_I;
>>> + else
>>> + fp->fmt_type = UAC_FORMAT_TYPE_III;
>>
>> maybe mention that this test only work because type IV is not supported,
>> otherwise this wouldn't quite right.
>
> Yes, will do it.
ok
>
>>
>>> +int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
>>> + struct audioformat *fp,
>>> + struct uac3_as_header_descriptor *as,
>>> + int stream);
>>> #endif /* __USBAUDIO_FORMAT_H */
>>> diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
>>> index 9732edf..5b5dfe4 100644
>>> --- a/sound/usb/mixer.c
>>> +++ b/sound/usb/mixer.c
>>> @@ -51,6 +51,7 @@
>>> #include <linux/usb.h>
>>> #include <linux/usb/audio.h>
>>> #include <linux/usb/audio-v2.h>
>>> +#include <linux/usb/audio-v3.h>
>>> #include <sound/core.h>
>>> #include <sound/control.h>
>>> @@ -189,7 +190,7 @@ static void *find_audio_control_unit(struct
>>> mixer_build *state,
>>> USB_DT_CS_INTERFACE)) != NULL) {
>>> if (hdr->bLength >= 4 &&
>>> hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
>>> - hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER
>>> &&
>>> + hdr->bDescriptorSubtype <= UAC3_SAMPLE_RATE_CONVERTER
>>> &&
>>> hdr->bUnitID == unit)
>>
>>
>> this looks like a mistake, the definitions are
>>
>> #define UAC3_SAMPLE_RATE_CONVERTER 0x0e
>> #define UAC3_CONNECTORS 0x0f
>> #define UAC3_POWER_DOMAIN 0x10
>>
>> You will miss the last two with this test.
>
> That's because connectors descriptor uses High Capability descriptor for
> replresentation, thus it can't be compared here.
> Power Domain descriptor isn't used yet by this driver, so let's check for
> it once this functionality will be added.
Not sure I understand, the goal of this test is to check if the
descriptors for the audio function look correct by looking at the range
of their subType, which is also supported in High Capability descriptors?
>
> Probably it makes sense to make this comparison UAC version depended
> to not break existing UAC1/2 functionality, I'll check it.
>
>>
>>
>>> - case UAC1_PROCESSING_UNIT:
>>> - case UAC1_EXTENSION_UNIT:
>>> - /* UAC2_PROCESSING_UNIT_V2 */
>>> - /* UAC2_EFFECT_UNIT */
>>> - case UAC2_EXTENSION_UNIT_V2: {
>>> - struct uac_processing_unit_descriptor *d = p1;
>>> -
>>> - if (state->mixer->protocol == UAC_VERSION_2 &&
>>> - hdr[2] == UAC2_EFFECT_UNIT) {
>>> - /* UAC2/UAC1 unit IDs overlap here in an
>>> - * uncompatible way. Ignore this unit for
>>> now.
>>> - */
>>> +
>>> + /* REVISIT: UAC3 IT doesn't have
>>> channels/cfg */
>>> + term->channels = 0;
>>> + term->chconfig = 0;
>>
>>
>> It does, but you need to get the information from the wClusterDescrID
>
> Correct. Channels are used during mixer parsing which we don't support
> yet, chconfig is set in many places but nobody uses it, so we can remove it from
> usb_audio_term struct.
ok
^ permalink raw reply [flat|nested] 18+ messages in thread
end of thread, other threads:[~2017-11-13 16:07 UTC | newest]
Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-11-07 2:01 [PATCH 0/1] USB Audio Device Class 3.0 support Ruslan Bilovol
2017-11-07 2:01 ` [PATCH 1/1] ALSA: usb: initial " Ruslan Bilovol
2017-11-08 14:38 ` Takashi Iwai
2017-11-08 14:38 ` Takashi Iwai
2017-11-09 8:04 ` Greg Kroah-Hartman
2017-11-09 8:16 ` Takashi Iwai
2017-11-09 8:16 ` Takashi Iwai
2017-11-09 8:33 ` Greg Kroah-Hartman
2017-11-09 8:58 ` Takashi Iwai
2017-11-09 8:58 ` Takashi Iwai
2017-11-11 2:56 ` Ruslan Bilovol
2017-11-11 7:29 ` Takashi Iwai
2017-11-10 11:12 ` Ruslan Bilovol
2017-11-08 16:46 ` kbuild test robot
2017-11-08 16:46 ` kbuild test robot
2017-11-08 19:38 ` [alsa-devel] " Pierre-Louis Bossart
2017-11-11 2:48 ` Ruslan Bilovol
2017-11-13 16:07 ` Pierre-Louis Bossart
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