NUSB(4)                                                   NUSB(4)

          audio, disk, ether, kb, serial, ptp, usbd - Universal Serial
          Bus drivers

          nusb/audio devid

          nusb/cam [ -d ] devid

          nusb/disk [ -d ] devid

          nusb/ether [ -dD ] [ -t ethertype ] [ -a addr ] devid

          nusb/kb [ -d ] devid

          nusb/joy [ -d ] devid

          nusb/serial [ -d ] devid

          nusb/ptp [ -dD ] devid

          nusb/usbd [ -dD ]

          These programs drive USB devices of specific classes via
          usb(3). Usually they are started by nusbrc(8) upon attach-
          ment of the device to the bus. All drivers except usbd take
          the decimal usb devid of the device they should handle as
          their last argument. A driver's instance handles only one
          device at a time.

          Drivers that provide file systems make them available as
          shares under /shr (see shr(3)) or /shr/usb (which is bound
          after /dev by nusbrc(8)).

          Options -d and -D trigger debug diagnostics and file system
          debugging diagnostics for most drivers. Repeating any one of
          these may increase verbosity.

          Usbd enumerates the tree of USB hubs and configures the
          device on attachment. It provides a filesystem with the file
          usbevent (usually seen as /dev/usbevent) which, when read,
          returns a 6-column, space-separated line of text, one for
          each event. The columns are: attach or detach followed by
          addr vid did csp and hname. The addr is the decimal device
          address assigned.  Vid and did are formatted as 4 digit hex-
          adecimal.  Csp is the device class, subclass, protocol
          indentifier formatted as 6 digit hexadecimal.  Usbd assigns
          a stable device identifier based on the device descriptor

     NUSB(4)                                                   NUSB(4)

          for hname. This information is read by nusbrc(8) and the
          addr and hname are passed to a suitable driver as devid in
          the form addr:hname

        Keyboards and mice
          Kb supports USB keyboards and mice either as separate USB
          devices or as a single combined USB device.  Scan codes from
          the keyboard are sent to /dev/kbin to let kbdfs(8) process
          them.  Mouse events are sent to /dev/mousein in the same
          way.  A file /dev/hidNctl supports setting keyboard repeat
          and delay setting, the unit is milliseconds.

          Joy parses data packets from a given endpoint and prints
          back any changes in the device's axes or buttons.  Buttons
          are identified via an integer id.

          Directional buttons are reported as axes with 3 positions:
          0, 128, and 255 for left (or up), center and right (or down)
          respectively.  Messages are in the form axis id position.

          On/off buttons are reported as either down or up respec-
          tively.  Messages are in the form down|up id.

          Disk configures and manages USB mass storage devices. It
          provides a file system (usually seen under /dev) that
          includes one directory per storage device, named sdUN[.M] in
          correspondence with the USB device identifier and the stor-
          age unit number (or LUN). The LUN is omited for single lun

          The storage device directory contains the usual files served
          by sd(3): data, raw, and ctl.

          The ctl file supplies the device geometry and partitions
          when read.

          Ether handles USB ethernet devices. The file system provided
          is compatible with ether(3) and added to the share usbnet
          (see shr(3)) which is bound after /net by nusbrc(8) so the
          device will appear as /net/etherUN.  Without specifying the
          -t option, the device is assumed to be a CDC compliant eth-
          ernet communication device. Other devices might require set-
          ting an explicit ethertype, such as rndis, smsc, url,
          lan78xx, aue, a88772 or a88178 (see nusbrc(8)). On devices
          that support it, the mac address can be set using the -a
          addr option.

        Serial and JTAG ports
          Serial provides a file system (usually seen under /dev) that

     NUSB(4)                                                   NUSB(4)

          includes one directory per USB serial port, named eiaUN or
          eiaUN[.M].  In this directory there are two files, eiaU,
          similar to eiaN in uart(3), and eiaUctl, which admits writes
          in the same format as eiaNctl in uart(3). Reading from
          eiaUctl gives the serial port's settings in the same format
          as eiaNstatus in uart(3). Options are similar to those of

          JTAG ports are similar but the files are named jtag and

        Audio devices
          Audio configures and manages a USB audio device.  It imple-
          ments a file system (normally seen under /dev), compatible
          with audio(3).

        Camera devices
          Cam configures and exposes a USB camera device's capabili-
          ties, implementing a file system compatible with camv(1),
          under a directory named camN[.M].  It provides the following
          files: desc, showing all of the device's internal descrip-
          tors and their values; format, listing admissible image res-
          olutions and framerates; ctl, the picture settings control
          file; frame, which captures and outputs a single video frame
          as an image(6) file; and video, streaming video in a preset
          format, resolution and framerate.  In particular, reading
          from the ctl file yields a space-separated list of parameter
          settings, where the second and third columns correspond to
          key-value pairs, and an optional fourth column corresponds
          to the range of possible numerical values (formatted as
          minimum/increment/maximum).  The same pairs can be written
          to the file to configure the camera.  Currently, only the
          YUY2 video format is supported.


          camv(1), joy(1), audio(3), ether(3), mouse(3), sd(3),
          uart(3), usb(3), shr(3), image(6), nusbrc(8), kbdfs(8)

          Joy first appeared in 9front (March, 2014).
          Cam first appeared in 9front (March, 2018).

          The various device drivers are generic USB drivers and may
          work only for certain devices of each class.

          USB ATA storage devices are not supported.

          The serial driver works only for the Prolific chip and Ftdi,

     NUSB(4)                                                   NUSB(4)

          and control of the dcd and dsr signals and some of the extra
          features are not implemented.  For Ftdi, only the Sheevaplug
          and Guruplug have been tried.  There is support for the EHCI
          debug port, but it loses bytes.

          USB video format settings cannot be changed while camv(1) is
          running, and must be set manually by writing them to
          cam(4)'sctl file before starting the viewer.