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source | linux | ===================
ARECA FIRMWARE SPEC
===================
Usage of IOP331 adapter
=======================
(All In/Out is in IOP331's view)
1. Message 0
------------
- InitThread message and return code
2. Doorbell is used for RS-232 emulation
----------------------------------------
inDoorBell
bit0
data in... | Documentation/scsi/arcmsr_spec.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================================
Linux driver for Brocade FC/FCOE adapters
=========================================
Supported Hardware
------------------
bfa 3.0.2.2 driver supports all Brocade FC/FCOE adapters. Below is a list of
adapter models with corresponding PCIIDs... | Documentation/scsi/bfa.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================
Operating FCoE using bnx2fc
===========================
Broadcom FCoE offload through bnx2fc is full stateful hardware offload that
cooperates with all interfaces provided by the Linux ecosystem for FC/FCoE and
SCSI controllers. As such, FCoE functionali... | Documentation/scsi/bnx2fc.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================================
Chelsio S3 iSCSI Driver for Linux
=================================
Introduction
============
The Chelsio T3 ASIC based Adapters (S310, S320, S302, S304, Mezz cards, etc.
series of products) support iSCSI acceleration and iSCSI Direct Data Placeme... | Documentation/scsi/cxgb3i.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================
dc395x SCSI driver
==================
Status
------
The driver has been tested with CD-R and CD-R/W drives. These should
be safe to use. Testing with hard disks has not been done to any
great degree and caution should be exercised if you want to attempt
to use th... | Documentation/scsi/dc395x.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================
Adaptec dpti driver
===================
Redistribution and use in source form, with or without modification, are
permitted provided that redistributions of source code must retain the
above copyright notice, this list of conditions and the following disclaimer.
... | Documentation/scsi/dpti.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
================
g_NCR5380 driver
================
Copyright |copy| 1993 Drew Eckhard
NCR53c400 extensions Copyright |copy| 1994,1995,1996 Kevin Lentin
This file documents the NCR53c400 extensions by Kevin Lentin and some
enhancements to the NCR5380 core... | Documentation/scsi/g_NCR5380.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================================
HPSA - Hewlett Packard Smart Array driver
=========================================
This file describes the hpsa SCSI driver for HP Smart Array controllers.
The hpsa driver is intended to supplant the cciss driver for newer
Smart Array cont... | Documentation/scsi/hpsa.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
======================================================
Highpoint RocketRAID 3xxx/4xxx Adapter Driver (hptiop)
======================================================
Controller Register Map
-----------------------
For RR44xx Intel IOP based adapters, the c... | Documentation/scsi/hptiop.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============
SCSI Subsystem
==============
.. toctree::
:maxdepth: 1
Introduction
============
.. toctree::
:maxdepth: 1
scsi
SCSI driver APIs
================
.. toctree::
:maxdepth: 1
scsi_mid_low_api
scsi_eh
SCSI driver parameters
=====================... | Documentation/scsi/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========
SAS Layer
=========
The SAS Layer is a management infrastructure which manages
SAS LLDDs. It sits between SCSI Core and SAS LLDDs. The
layout is as follows: while SCSI Core is concerned with
SAM/SPC issues, and a SAS LLDD+sequencer is concerned with
phy/OOB/link managem... | Documentation/scsi/libsas.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========================
Link Power Managent Policy
==========================
This parameter allows the user to set the link (interface) power management.
There are 6 possible options:
====================== =====================================================
Value Effect
... | Documentation/scsi/link_power_management_policy.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================
LPFC Driver Release Notes
=========================
.. important::
Starting in the 8.0.17 release, the driver began to be targeted strictly
toward the upstream kernel. As such, we removed #ifdefs for older kernels
(pre 2.6.10). The 8.0.16 release s... | Documentation/scsi/lpfc.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================================
Megaraid Common Management Module
=================================
Overview
--------
Different classes of controllers from LSI Logic accept and respond to the
user applications in a similar way. They understand the same firmware control
commands.... | Documentation/scsi/megaraid.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================
NCR53C8XX/SYM53C8XX drivers
===========================
Written by Gerard Roudier <groudier@free.fr>
21 Rue Carnot
95170 DEUIL LA BARRE - FRANCE
29 May 1999
.. Contents:
1. Introduction
2. Supported chips and SCSI features
3. Advantages ... | Documentation/scsi/ncr53c8xx.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================================
Terse where to get ZIP Drive help info
======================================
General Iomega ZIP drive page for Linux:
http://web.archive.org/web/%2E/http://www.torque.net/~campbell/
Driver archive for old drivers:
http://web.archive.org/web/... | Documentation/scsi/ppa.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================================
Qlogic FASXXX Family Driver Notes
=================================
This driver supports the Qlogic FASXXX family of chips. This driver
only works with the ISA, VLB, and PCMCIA versions of the Qlogic
FastSCSI! cards as well as any other card base... | Documentation/scsi/qlogicfas.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================
SCSI media changer driver
=========================
This is a driver for SCSI Medium Changer devices, which are listed
with "Type: Medium Changer" in /proc/scsi/scsi.
This is for *real* Jukeboxes. It is *not* supported to work with
common small CD-ROM ch... | Documentation/scsi/scsi-changer.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
========================
SCSI Generic (sg) driver
========================
20020126
Introduction
============
The SCSI Generic driver (sg) is one of the four "high level" SCSI device
drivers along with sd, st and sr (disk, ta... | Documentation/scsi/scsi-generic.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================
SCSI Kernel Parameters
======================
See Documentation/admin-guide/kernel-parameters.rst for general information on
specifying module parameters.
This document may not be entirely up to date and comprehensive. The command
``modinfo -p ${modulename}`... | Documentation/scsi/scsi-parameters.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============================
SCSI subsystem documentation
============================
The Linux Documentation Project (LDP) maintains a document describing
the SCSI subsystem in the Linux kernel (lk) 2.4 series. See:
https://www.tldp.org/HOWTO/SCSI-2.4-HOWTO . The LDP has single
a... | Documentation/scsi/scsi.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=======
SCSI EH
=======
This document describes SCSI midlayer error handling infrastructure.
Please refer to Documentation/scsi/scsi_mid_low_api.rst for more
information regarding SCSI midlayer.
.. TABLE OF CONTENTS
[1] How SCSI commands travel through the midlayer and to EH
... | Documentation/scsi/scsi_eh.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================
SCSI FC Transport
=================
Date: 11/18/2008
Kernel Revisions for features::
rports : <<TBS>>
vports : 2.6.22
bsg support : 2.6.30 (?TBD?)
Introduction
============
This file documents the features and components of the SCSI FC Transport.
It als... | Documentation/scsi/scsi_fc_transport.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============================================
SCSI mid_level - lower_level driver interface
=============================================
Introduction
============
This document outlines the interface between the Linux SCSI mid level and
SCSI lower level drivers. Lower level driver... | Documentation/scsi/scsi_mid_low_api.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
======================================
Linux SCSI Disk Driver (sd) Parameters
======================================
cache_type (RW)
---------------
Enable/disable drive write & read cache.
=========================== === === =========== ==========
cache_type string ... | Documentation/scsi/sd-parameters.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============================================
SMARTPQI - Microchip Smart Storage SCSI driver
==============================================
This file describes the smartpqi SCSI driver for Microchip
(http://www.microchip.com) PQI controllers. The smartpqi driver
is the next genera... | Documentation/scsi/smartpqi.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================
The SCSI Tape Driver
====================
This file contains brief information about the SCSI tape driver.
The driver is currently maintained by Kai Mäkisara (email
Kai.Makisara@kolumbus.fi)
Last modified: Tue Feb 9 21:54:16 2016 by kai.makisara
Basics
====... | Documentation/scsi/st.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=======================
The sym53c500_cs Driver
=======================
The sym53c500_cs driver originated as an add-on to David Hinds' pcmcia-cs
package, and was written by Tom Corner (tcorner@via.at). A rewrite was
long overdue, and the current version addresses the following co... | Documentation/scsi/sym53c500_cs.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============
SYM-2 driver
============
Written by Gerard Roudier <groudier@free.fr>
21 Rue Carnot
95170 DEUIL LA BARRE - FRANCE
Updated by Matthew Wilcox <matthew@wil.cx>
2004-10-09
.. Contents
1. Introduction
2. Supported chips and SCSI features
3. Advantages of ... | Documentation/scsi/sym53c8xx_2.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
========================
tcm_qla2xxx Driver Notes
========================
tcm_qla2xxx jam_host attribute
------------------------------
There is now a new module endpoint attribute called jam_host
attribute::
jam_host: boolean=0/1
This attribute and accompanying code is only in... | Documentation/scsi/tcm_qla2xxx.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=======================
Universal Flash Storage
=======================
.. Contents
1. Overview
2. UFS Architecture Overview
2.1 Application Layer
2.2 UFS Transport Protocol (UTP) layer
2.3 UFS Interconnect (UIC) Layer
3. UFSHCD Overview
3.1 UFS contr... | Documentation/scsi/ufs.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===============================================================
Driver for Western Digital WD7193, WD7197 and WD7296 SCSI cards
===============================================================
The card requires firmware that can be cut out of the Windows NT driver that
can be downlo... | Documentation/scsi/wd719x.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
SCSI RDMA (SRP) transport class diagram
=======================================
.. kernel-figure:: rport_state_diagram.dot | Documentation/scsi/scsi_transport_srp/figures.rst | null | null | null | null | null |
source | linux | =================================
IMA Template Management Mechanism
=================================
Introduction
============
The original ``ima`` template is fixed length, containing the filedata hash
and pathname. The filedata hash is limited to 20 bytes (md5/sha1).
The pathname is a null terminated string, limi... | Documentation/security/IMA-templates.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====
SCTP
====
SCTP LSM Support
================
Security Hooks
--------------
For security module support, three SCTP specific hooks have been implemented::
security_sctp_assoc_request()
security_sctp_bind_connect()
security_sctp_sk_clone()
security_sctp_assoc_e... | Documentation/security/SCTP.rst | null | null | null | null | null |
source | linux | ====================
Credentials in Linux
====================
By: David Howells <dhowells@redhat.com>
.. contents:: :local:
Overview
========
There are several parts to the security check performed by Linux when one
object acts upon another:
1. Objects.
Objects are things in the system that may be acted up... | Documentation/security/credentials.rst | null | null | null | null | null |
source | linux | ==================================
Digital Signature Verification API
==================================
:Author: Dmitry Kasatkin
:Date: 06.10.2011
.. CONTENTS
1. Introduction
2. API
3. User-space utilities
Introduction
============
Digital signature verification API provides a method to verify digital ... | Documentation/security/digsig.rst | null | null | null | null | null |
source | linux | ======================
Security Documentation
======================
.. toctree::
:maxdepth: 1
credentials
snp-tdx-threat-model
IMA-templates
keys/index
lsm
lsm-development
sak
SCTP
self-protection
siphash
tpm/index
digsig
landlock
secrets/index
ipe | Documentation/security/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
Integrity Policy Enforcement (IPE) - Kernel Documentation
=========================================================
.. NOTE::
This is documentation targeted at developers, instead of administrators.
If you're looking for documentation on the usage of IPE, please see
:doc:... | Documentation/security/ipe.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
.. Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
.. Copyright © 2019-2020 ANSSI
==================================
Landlock LSM: kernel documentation
==================================
:Author: Mickaël Salaün
:Date: September 2025
Landlock's goal is to create scoped acces... | Documentation/security/landlock.rst | null | null | null | null | null |
source | linux | =================================
Linux Security Module Development
=================================
Based on https://lore.kernel.org/r/20071026073721.618b4778@laptopd505.fenrus.org,
a new LSM is accepted into the kernel when its intent (a description of
what it tries to protect against and in what cases one would ex... | Documentation/security/lsm-development.rst | null | null | null | null | null |
source | linux | ========================================================
Linux Security Modules: General Security Hooks for Linux
========================================================
:Author: Stephen Smalley
:Author: Timothy Fraser
:Author: Chris Vance
.. note::
The APIs described in this book are outdated.
Introduction
===... | Documentation/security/lsm.rst | null | null | null | null | null |
source | linux | =========================================
Linux Secure Attention Key (SAK) handling
=========================================
:Date: 18 March 2001
:Author: Andrew Morton
An operating system's Secure Attention Key is a security tool which is
provided as protection against trojan password capturing programs. It
is an ... | Documentation/security/sak.rst | null | null | null | null | null |
source | linux | ======================
Kernel Self-Protection
======================
Kernel self-protection is the design and implementation of systems and
structures within the Linux kernel to protect against security flaws in
the kernel itself. This covers a wide range of issues, including removing
entire classes of bugs, blocking ... | Documentation/security/self-protection.rst | null | null | null | null | null |
source | linux | ===========================
SipHash - a short input PRF
===========================
:Author: Written by Jason A. Donenfeld <jason@zx2c4.com>
SipHash is a cryptographically secure PRF -- a keyed hash function -- that
performs very well for short inputs, hence the name. It was designed by
cryptographers Daniel J. Berns... | Documentation/security/siphash.rst | null | null | null | null | null |
source | linux | ======================================================
Confidential Computing in Linux for x86 virtualization
======================================================
.. contents:: :local:
By: Elena Reshetova <elena.reshetova@intel.com> and Carlos Bilbao <carlos.bilbao.osdev@gmail.com>
Motivation
==========
Kernel de... | Documentation/security/snp-tdx-threat-model.rst | null | null | null | null | null |
source | linux | ============================
Kernel Key Retention Service
============================
This service allows cryptographic keys, authentication tokens, cross-domain
user mappings, and similar to be cached in the kernel for the use of
filesystems and other kernel services.
Keyrings are permitted; these are a special typ... | Documentation/security/keys/core.rst | null | null | null | null | null |
source | linux | ==========================================
Encrypted keys for the eCryptfs filesystem
==========================================
ECryptfs is a stacked filesystem which transparently encrypts and decrypts each
file using a randomly generated File Encryption Key (FEK).
Each FEK is in turn encrypted with a File Encrypti... | Documentation/security/keys/ecryptfs.rst | null | null | null | null | null |
source | linux | ===========
Kernel Keys
===========
.. toctree::
:maxdepth: 1
core
ecryptfs
request-key
trusted-encrypted | Documentation/security/keys/index.rst | null | null | null | null | null |
source | linux | ===================
Key Request Service
===================
The key request service is part of the key retention service (refer to
Documentation/security/keys/core.rst). This document explains more fully how
the requesting algorithm works.
The process starts by either the kernel requesting a service by calling
``req... | Documentation/security/keys/request-key.rst | null | null | null | null | null |
source | linux | ==========================
Trusted and Encrypted Keys
==========================
Trusted and Encrypted Keys are two new key types added to the existing kernel
key ring service. Both of these new types are variable length symmetric keys,
and in both cases all keys are created in the kernel, and user space sees,
stores... | Documentation/security/keys/trusted-encrypted.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============================
Confidential Computing secrets
==============================
This document describes how Confidential Computing secret injection is handled
from the firmware to the operating system, in the EFI driver and the efi_secret
kernel module.
Introduction
... | Documentation/security/secrets/coco.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
Secrets documentation
=====================
.. toctree::
coco | Documentation/security/secrets/index.rst | null | null | null | null | null |
source | linux | =====================================
Trusted Platform Module documentation
=====================================
.. toctree::
tpm_event_log
tpm-security
tpm_tis
tpm_vtpm_proxy
xen-tpmfront
tpm_ftpm_tee
tpm_ffa_crb | Documentation/security/tpm/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0-only
TPM Security
============
The object of this document is to describe how we make the kernel's
use of the TPM reasonably robust in the face of external snooping and
packet alteration attacks (called passive and active interposer attack
in the literature). The current security ... | Documentation/security/tpm/tpm-security.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============
TPM Event Log
=============
This document briefly describes what TPM log is and how it is handed
over from the preboot firmware to the operating system.
Introduction
============
The preboot firmware maintains an event log that gets new entries every
time something ... | Documentation/security/tpm/tpm_event_log.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
========================
TPM CRB over FF-A Driver
========================
The TPM Command Response Buffer (CRB) interface is a standard TPM interface
defined in the TCG PC Client Platform TPM Profile (PTP) Specification [1]_.
The CRB provides a structured set of control registers ... | Documentation/security/tpm/tpm_ffa_crb.rst | null | null | null | null | null |
source | linux | =============================================
Firmware TPM Driver
=============================================
This document describes the firmware Trusted Platform Module (fTPM)
device driver.
Introduction
============
This driver is a shim for firmware implemented in ARM's TrustZone
environment. The driver allows... | Documentation/security/tpm/tpm_ftpm_tee.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================
TPM FIFO interface driver
=========================
TCG PTP Specification defines two interface types: FIFO and CRB. The former is
based on sequenced read and write operations, and the latter is based on a
buffer containing the full command or response.
... | Documentation/security/tpm/tpm_tis.rst | null | null | null | null | null |
source | linux | =============================================
Virtual TPM Proxy Driver for Linux Containers
=============================================
| Authors:
| Stefan Berger <stefanb@linux.vnet.ibm.com>
This document describes the virtual Trusted Platform Module (vTPM)
proxy device driver for Linux containers.
Introduction
=... | Documentation/security/tpm/tpm_vtpm_proxy.rst | null | null | null | null | null |
source | linux | =============================
Virtual TPM interface for Xen
=============================
Authors: Matthew Fioravante (JHUAPL), Daniel De Graaf (NSA)
This document describes the virtual Trusted Platform Module (vTPM) subsystem for
Xen. The reader is assumed to have familiarity with building and installing Xen,
Linux,... | Documentation/security/tpm/xen-tpmfront.rst | null | null | null | null | null |
source | linux | ==============================================================
Advanced Linux Sound Architecture - Driver Configuration guide
==============================================================
Kernel Configuration
====================
To enable ALSA support you need at least to build the kernel with
primary sound card s... | Documentation/sound/alsa-configuration.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============================
Sound Subsystem Documentation
=============================
.. toctree::
:maxdepth: 2
kernel-api/index
designs/index
soc/index
alsa-configuration
hd-audio/index
cards/index
codecs/index
utimers | Documentation/sound/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=======================
Userspace-driven timers
=======================
:Author: Ivan Orlov <ivan.orlov0322@gmail.com>
Preface
=======
This document describes the userspace-driven timers: virtual ALSA timers
which could be created and controlled by userspace applications using
IO... | Documentation/sound/utimers.rst | null | null | null | null | null |
source | linux | =============================================
Sound Blaster Audigy mixer / default DSP code
=============================================
This is based on sb-live-mixer.rst.
The EMU10K2 chips have a DSP part which can be programmed to support
various ways of sample processing, which is described here.
(This article ... | Documentation/sound/cards/audigy-mixer.rst | null | null | null | null | null |
source | linux | ========================================================
Guide to using M-Audio Audiophile USB with ALSA and Jack
========================================================
v1.5
Thibault Le Meur <Thibault.LeMeur@supelec.fr>
This document is a guide to using the M-Audio Audiophile USB (tm) device with
ALSA and JACK.
... | Documentation/sound/cards/audiophile-usb.rst | null | null | null | null | null |
source | linux | =================
ALSA BT87x Driver
=================
Intro
=====
You might have noticed that the bt878 grabber cards have actually
*two* PCI functions:
::
$ lspci
[ ... ]
00:0a.0 Multimedia video controller: Brooktree Corporation Bt878 (rev 02)
00:0a.1 Multimedia controller: Brooktree Corporation Bt878 (rev... | Documentation/sound/cards/bt87x.rst | null | null | null | null | null |
source | linux | =================================================
Brief Notes on C-Media 8338/8738/8768/8770 Driver
=================================================
Takashi Iwai <tiwai@suse.de>
Front/Rear Multi-channel Playback
---------------------------------
CM8x38 chip can use ADC as the second DAC so that two different stere... | Documentation/sound/cards/cmipci.rst | null | null | null | null | null |
source | linux | ==================================================
E-MU Digital Audio System mixer / default DSP code
==================================================
This document covers the E-MU 0404/1010/1212/1616/1820 PCI/PCI-e/CardBus
cards.
These cards use regular EMU10K2 (SoundBlaster Audigy) chips, but with an
alternative ... | Documentation/sound/cards/emu-mixer.rst | null | null | null | null | null |
source | linux | =================================================================
Low latency, multichannel audio with JACK and the emu10k1/emu10k2
=================================================================
This document is a guide to using the emu10k1 based devices with JACK for low
latency, multichannel recording functionali... | Documentation/sound/cards/emu10k1-jack.rst | null | null | null | null | null |
source | linux | =======================================
Software Interface ALSA-DSP MADI Driver
=======================================
(translated from German, so no good English ;-),
2004 - winfried ritsch
Full functionality has been added to the driver. Since some of
the Controls and startup-options are ALSA-Standard and onl... | Documentation/sound/cards/hdspm.rst | null | null | null | null | null |
source | linux | ================================================
Imagination Technologies SPDIF Input Controllers
================================================
The Imagination Technologies SPDIF Input controller contains the following
controls:
* name='IEC958 Capture Mask',index=0
This control returns a mask that shows which of ... | Documentation/sound/cards/img-spdif-in.rst | null | null | null | null | null |
source | linux | Card-Specific Information
=========================
.. toctree::
:maxdepth: 2
joystick
cmipci
sb-live-mixer
audigy-mixer
emu-mixer
emu10k1-jack
via82xx-mixer
audiophile-usb
mixart
bt87x
maya44
hdspm
serial-u16550
img-spdif-in
pcmtest | Documentation/sound/cards/index.rst | null | null | null | null | null |
source | linux | =======================================
Analog Joystick Support on ALSA Drivers
=======================================
Oct. 14, 2003
Takashi Iwai <tiwai@suse.de>
General
-------
First of all, you need to enable GAMEPORT support on Linux kernel for
using a joystick with the ALSA driver. For the details of gameport... | Documentation/sound/cards/joystick.rst | null | null | null | null | null |
source | linux | =================================
Notes on Maya44 USB Audio Support
=================================
.. note::
The following is the original document of Rainer's patch that the
current maya44 code based on. Some contents might be obsoleted, but I
keep here as reference -- tiwai
Feb 14, 2008
Rainer Zimmerm... | Documentation/sound/cards/maya44.rst | null | null | null | null | null |
source | linux | ==============================================================
Alsa driver for Digigram miXart8 and miXart8AES/EBU soundcards
==============================================================
Digigram <alsa@digigram.com>
GENERAL
=======
The miXart8 is a multichannel audio processing and mixing soundcard
that has 4 ste... | Documentation/sound/cards/mixart.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
The Virtual PCM Test Driver
===========================
The Virtual PCM Test Driver emulates a generic PCM device, and can be used for
testing/fuzzing of the userspace ALSA applications, as well as for testing/fuzzing of
the PCM middle layer. Additionally, it can be used for simula... | Documentation/sound/cards/pcmtest.rst | null | null | null | null | null |
source | linux | ===========================================
Sound Blaster Live mixer / default DSP code
===========================================
The EMU10K1 chips have a DSP part which can be programmed to support
various ways of sample processing, which is described here.
(This article does not deal with the overall functionalit... | Documentation/sound/cards/sb-live-mixer.rst | null | null | null | null | null |
source | linux | ===================================
Serial UART 16450/16550 MIDI driver
===================================
The adaptor module parameter allows you to select either:
* 0 - Roland Soundcanvas support (default)
* 1 - Midiator MS-124T support (1)
* 2 - Midiator MS-124W S/A mode (2)
* 3 - MS-124W M/B mode support (3)
* 4... | Documentation/sound/cards/serial-u16550.rst | null | null | null | null | null |
source | linux | =============
VIA82xx mixer
=============
On many VIA82xx boards, the ``Input Source Select`` mixer control does not work.
Setting it to ``Input2`` on such boards will cause recording to hang, or fail
with EIO (input/output error) via OSS emulation. This control should be left
at ``Input1`` for such cards. | Documentation/sound/cards/via82xx-mixer.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0-only
========================================================================
Audio drivers for Cirrus Logic CS35L54/56/57/63 Boosted Smart Amplifiers
========================================================================
:Copyright: 2025 Cirrus Logic, Inc. and
Ci... | Documentation/sound/codecs/cs35l56.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
Codec-Specific Information
==========================
.. toctree::
:maxdepth: 2
cs35l56 | Documentation/sound/codecs/index.rst | null | null | null | null | null |
source | linux | ============================
ALSA PCM channel-mapping API
============================
Takashi Iwai <tiwai@suse.de>
General
=======
The channel mapping API allows user to query the possible channel maps
and the current channel map, also optionally to modify the channel map
of the current stream.
A channel map is an... | Documentation/sound/designs/channel-mapping-api.rst | null | null | null | null | null |
source | linux | ==================================
ALSA Co-processor Acceleration API
==================================
Jaroslav Kysela <perex@perex.cz>
Overview
========
There is a requirement to expose the audio hardware that accelerates various
tasks for user space such as sample rate converters, compressed
stream decoders, et... | Documentation/sound/designs/compress-accel.rst | null | null | null | null | null |
source | linux | =========================
ALSA Compress-Offload API
=========================
Pierre-Louis.Bossart <pierre-louis.bossart@linux.intel.com>
Vinod Koul <vinod.koul@linux.intel.com>
Overview
========
Since its early days, the ALSA API was defined with PCM support or
constant bitrates payloads such as IEC61937 in mind. ... | Documentation/sound/designs/compress-offload.rst | null | null | null | null | null |
source | linux | ===========================
Standard ALSA Control Names
===========================
This document describes standard names of mixer controls.
Standard Syntax
---------------
Syntax: [LOCATION] SOURCE [CHANNEL] [DIRECTION] FUNCTION
DIRECTION
~~~~~~~~~
================ ===============
<nothing> both directions
Playb... | Documentation/sound/designs/control-names.rst | null | null | null | null | null |
source | linux | Designs and Implementations
===========================
.. toctree::
:maxdepth: 2
control-names
channel-mapping-api
compress-accel
compress-offload
timestamping
jack-controls
tracepoints
procfile
powersave
oss-emulation
seq-oss
jack-injection
midi-2.0 | Documentation/sound/designs/index.rst | null | null | null | null | null |
source | linux | ==================
ALSA Jack Controls
==================
Why we need Jack kcontrols
==========================
ALSA uses kcontrols to export audio controls(switch, volume, Mux, ...)
to user space. This means userspace applications like pulseaudio can
switch off headphones and switch on speakers when no headphones are... | Documentation/sound/designs/jack-controls.rst | null | null | null | null | null |
source | linux | ============================
ALSA Jack Software Injection
============================
Simple Introduction On Jack Injection
=====================================
Here jack injection means users could inject plugin or plugout events
to the audio jacks through debugfs interface, it is helpful to
validate ALSA userspac... | Documentation/sound/designs/jack-injection.rst | null | null | null | null | null |
source | linux | =================
MIDI 2.0 on Linux
=================
General
=======
MIDI 2.0 is an extended protocol for providing higher resolutions and
more fine controls over the legacy MIDI 1.0. The fundamental changes
introduced for supporting MIDI 2.0 are:
- Support of Universal MIDI Packet (UMP)
- Support of MIDI 2.0 prot... | Documentation/sound/designs/midi-2.0.rst | null | null | null | null | null |
source | linux | =============================
Notes on Kernel OSS-Emulation
=============================
Jan. 22, 2004 Takashi Iwai <tiwai@suse.de>
Modules
=======
ALSA provides a powerful OSS emulation on the kernel.
The OSS emulation for PCM, mixer and sequencer devices is implemented
as add-on kernel modules, snd-pcm-oss, snd... | Documentation/sound/designs/oss-emulation.rst | null | null | null | null | null |
source | linux | ==========================
Notes on Power-Saving Mode
==========================
AC97 and HD-audio drivers have the automatic power-saving mode.
This feature is enabled via Kconfig ``CONFIG_SND_AC97_POWER_SAVE``
and ``CONFIG_SND_HDA_POWER_SAVE`` options, respectively.
With the automatic power-saving, the driver turns... | Documentation/sound/designs/powersave.rst | null | null | null | null | null |
source | linux | ==========================
Proc Files of ALSA Drivers
==========================
Takashi Iwai <tiwai@suse.de>
General
=======
ALSA has its own proc tree, /proc/asound. Many useful information are
found in this tree. When you encounter a problem and need debugging,
check the files listed in the following sections.
... | Documentation/sound/designs/procfile.rst | null | null | null | null | null |
source | linux | ===============================
OSS Sequencer Emulation on ALSA
===============================
Copyright (c) 1998,1999 by Takashi Iwai
ver.0.1.8; Nov. 16, 1999
Description
===========
This directory contains the OSS sequencer emulation driver on ALSA. Note
that this program is still in the development state.
What... | Documentation/sound/designs/seq-oss.rst | null | null | null | null | null |
source | linux | =====================
ALSA PCM Timestamping
=====================
The ALSA API can provide two different system timestamps:
- Trigger_tstamp is the system time snapshot taken when the .trigger
callback is invoked. This snapshot is taken by the ALSA core in the
general case, but specific hardware may have synchron... | Documentation/sound/designs/timestamping.rst | null | null | null | null | null |
source | linux | ===================
Tracepoints in ALSA
===================
2017/07/02
Takasahi Sakamoto
Tracepoints in ALSA PCM core
============================
ALSA PCM core registers ``snd_pcm`` subsystem to kernel tracepoint system.
This subsystem includes two categories of tracepoints; for state of PCM buffer
and for processi... | Documentation/sound/designs/tracepoints.rst | null | null | null | null | null |
source | linux | ======================================
HD-Audio Codec-Specific Mixer Controls
======================================
This file explains the codec-specific mixer controls.
Realtek codecs
--------------
Channel Mode
This is an enum control to change the surround-channel setup,
appears only when the surround chann... | Documentation/sound/hd-audio/controls.rst | null | null | null | null | null |
source | linux | =======================
HD-Audio DP-MST Support
=======================
To support DP MST audio, HD Audio hdmi codec driver introduces virtual pin
and dynamic pcm assignment.
Virtual pin is an extension of per_pin. The most difference of DP MST
from legacy is that DP MST introduces device entry. Each pin can contain
... | Documentation/sound/hd-audio/dp-mst.rst | null | null | null | null | null |
source | linux | HD-Audio
========
.. toctree::
:maxdepth: 2
notes
models
controls
dp-mst
realtek-pc-beep
intel-multi-link | Documentation/sound/hd-audio/index.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
.. include:: <isonum.txt>
================================================
HDAudio multi-link extensions on Intel platforms
================================================
:Copyright: |copy| 2023 Intel Corporation
This file documents the 'multi-link structu... | Documentation/sound/hd-audio/intel-multi-link.rst | null | null | null | null | null |
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