Documentation/usb/usb-serial.rst

Source file repositories/reference/linux-study-clean/Documentation/usb/usb-serial.rst

File Facts

System: Linux kernel
Corpus path: Documentation/usb/usb-serial.rst
Extension: .rst
Size: 20123 bytes
Lines: 538
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

==========
USB serial
==========

Introduction
============

  The USB serial driver currently supports a number of different USB to
  serial converter products, as well as some devices that use a serial
  interface from userspace to talk to the device.

  See the individual product section below for specific information about
  the different devices.


Configuration
=============

  Currently the driver can handle up to 256 different serial interfaces at
  one time.

    The major number that the driver uses is 188 so to use the driver,
    create the following nodes::

	mknod /dev/ttyUSB0 c 188 0
	mknod /dev/ttyUSB1 c 188 1
	mknod /dev/ttyUSB2 c 188 2
	mknod /dev/ttyUSB3 c 188 3
		.
		.
		.
	mknod /dev/ttyUSB254 c 188 254
	mknod /dev/ttyUSB255 c 188 255

  When the device is connected and recognized by the driver, the driver
  will print to the system log, which node(s) the device has been bound
  to.


Specific Devices Supported
==========================


ConnectTech WhiteHEAT 4 port converter
--------------------------------------

  ConnectTech has been very forthcoming with information about their
  device, including providing a unit to test with.

  The driver is officially supported by Connect Tech Inc.
  http://www.connecttech.com

  For any questions or problems with this driver, please contact
  Connect Tech's Support Department at support@connecttech.com


HandSpring Visor, Palm USB, and Clié USB driver
-----------------------------------------------

  This driver works with all HandSpring USB, Palm USB, and Sony Clié USB
  devices.

  Only when the device tries to connect to the host, will the device show
  up to the host as a valid USB device. When this happens, the device is
  properly enumerated, assigned a port, and then communication _should_ be
  possible. The driver cleans up properly when the device is removed, or
  the connection is canceled on the device.

  NOTE:
    This means that in order to talk to the device, the sync button must be

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.