Drivers Sunix Multifunction Devices

Posted on  by

-->

A multifunction device occupies one location on its parent bus but contains more than one function. Combination printer/scanner/fax devices and modem/network cards are common multifunction devices.

PCI\\VEN_1409&DEV_7268&SUBSYS_010317AA&REV_01

In a multifunction device, the individual functions are independent. This means the functions must have the following characteristics:

The system multifunction driver (for example, Mf.sys on Microsoft Windows 2000 and later; see Using the System-Supplied Multifunction Bus Driver) can configure the base address for each subdevice's status, command, and data registers independently of the registers for the other functions. If your device's BARs are not logically separable. Ensure that the device conforms to the specification for the bus on which the device will reside. Provide a PnP function driver for each function of the device. Since the system-supplied bus driver handles the multifunction semantics, the function drivers can be the same drivers that are used when the functions are packaged as individual devices.

  • The functions cannot have start-order dependencies.

  • The resource requirements for one function cannot be expressed in terms of the resources of another function (for example, function1 uses I/O port x and function2 uses port x + 200).

  • Each function must be able to operate as a separate device, even if it is serviced by the same drivers as another function.

  • Each function on the device must be enumerated.

  • Resource requirements for each function must be communicated to the PnP manager.

  • There must be INF files and drivers for each function.

The component responsible for each of these tasks depends on the multifunction standard for the device's parent bus, the extent to which the device conforms to the standard, and the capabilities of the parent bus driver.

If the device complies with the multifunction standards for its bus, your driver requirements are significantly reduced. Industry-wide multifunction standards have been defined for the PC Card and PCI buses.

If you are working with a multifunction DVD/CD-ROM device used for data storage (not for audio/video playback), you should use the system-supplied WDM DVD class driver, which treats the device as a single logical unit.

List

For a multifunction device that combines other functionality, you can use a system-supplied driver and INF file if the device complies with the multifunction standards for its bus. The system supplied multifunction driver (mf.sys) can handle the bus-level enumeration and resource allocation requirements for the device, and the system-supplied INF (mf.sys) can install the multifunction device. You need to supply only a function driver and INF file for each of the individual device functions.

If the device does not comply with the standard for its bus, you might need to supply a driver equivalent to mf.sys in functionality, in addition to function drivers and INF files for the device functions.

SUNIX LPT Port - R296702.exe Driver For Windows 7/10/XP/8/8.1 ...

To install a multifunction device, you typically provide a base INF file for the device and an additional INF file for each of the device's functions. The base INF file typically copies the INF files for the device's individual functions. For information about how to accomplish this, see Copying INFs.

The following sections describe driver and installation requirements for various types of multifunction devices:

See INF File Sections and INF File Directives for information about INF file syntax.

The Windows Driver Kit (WDK) includes a separate section that describes how to support multifunction audio devices.

-->

The PC Card multifunction standard specifies that a multifunction device has a set of configuration registers in attribute memory for each function. These registers allow the PCMCIA bus driver to, for example, enable each function independently and define a range of I/O resources that are exclusive to each function. The standard also specifies that a multifunction device contains, in attribute memory, the address of each set of configuration registers. These addresses enable the PCMCIA bus driver to program the configuration registers.

Multifunctional devices Drivers Download

If a 16-bit PC Card device implements the PC Card multifunction standard completely and correctly, the vendor of such a device has minimal INF and driver requirements to ensure that the device is configured properly on an NT-based system. See Supporting PC Cards That Conform to the Multifunction Standard for more information.

If a 16-bit PC Card device does not fully implement the PC Card multifunction standard, the vendor must provide the missing information in an INF file. There are two ways that a multifunction PC Card device might fail to implement the multifunction standard:

  1. The device implements a set of multifunction configuration registers per function but does not contain the locations of all sets of registers in its attribute memory.

  2. The device does not implement a set of multifunction configuration registers per function.

If a device has the limitations listed above, the PCMCIA bus driver can program the configuration registers if the device's INF has the necessary information in DDInstall.LogConfigOverride section(s). See the following sections for further information:

DriverHive - Device Driver Updater Software

Cardbus devices essentially follow the PCI multifunction rules. See Supporting Multifunction PCI Devices.