USB_MID(4D) Devices USB_MID(4D)

NAME

usb_mid - USB Multi Interface Driver

SYNOPSIS

device@unit-address

DESCRIPTION

The usb_mid driver is a USBA (Solaris Universal Serial Bus
Architecture)-compliant nexus driver that binds to device level nodes
of a composite (multi interface) device if no vendor or class-
specific driver is available. The usb_mid driver creates interface
nodes or interface association nodes and attempts to bind drivers to
them. If no driver is found for interface association nodes,
usb_ia(4D) is bound by default.

UGEN (Generic USB)
The usb_mid driver also supports a ugen(4D) interface allowing raw
access to the device, for example by libusb applications, by passing
the drivers bound to each interface. Since a libusb application might
change the state of the device, you should not access the device
through the child interface drivers. Note that the usb_mid driver
creates a ugen interface only if none of its children are explicitly
bound to the ugen(4D) driver. Additionally, usb_mid does not create
children.

FILES

/kernel/drv/usb_mid

32-bit x86 ELF kernel module


/kernel/drv/amd64/usb_mid

64-bit x86 ELF kernel module


/kernel/drv/sparcv9/usb_mid

64-bit SPARC ELF kernel module


/dev/usb/*/*/*

ugen(4D) nodes.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+---------------+--------------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------------+
|Architecture | SPARC & x86, PCI-based systems |
+---------------+--------------------------------+

SEE ALSO

usb_ia(4D), usba(4D), attributes(7), cfgadm_usb(8)


Writing Device Drivers


Universal Serial Bus Specification 2.0--2000


Interface Association Descriptor Engineering Change Notice
(ECN)--2003


System Administration Guide: Basic Administration

DIAGNOSTICS

In addition to being logged, the following messages may appear on the
system console. All messages are formatted in the following manner:

Warning: <device path> (usb_mid<instance number>): Error Message...


Cannot access <device>. Please reconnect.

This device has been disconnected because a device other than the
original one has been inserted. The driver informs you of this
fact by displaying the name of the original device.


Device not identical to the previous one on this port. Please
disconnect and reconnect.

Same condition as described above; however in this case, the
driver is unable to identify the original device with a name
string.


Please disconnect and reconnect this device.

A hotplug of the device is needed before it can be restored.


The following messages may be logged into the system log. They are
formatted in the following manner:

<device path><usb_mid<instance number>): message...


No driver found for interface <n> (nodename: <string>) of <device>.

No driver is available for this interface.


No driver found for device <device>.

No driver is available for this interface.


Can't support ugen for multiple configuration devices that have
attached child interface drivers.

No ugen interface is available and libusb cannot work with this
device.


May 13, 2017 USB_MID(4D)