.\" $NetBSD: adb.4,v 1.4 2018/08/31 19:36:28 sevan Exp $ .\" .\" Copyright (c) 2003 Alex Zepeda .\" Copyright (c) 1997 Colin Wood .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by Alex Zepeda, and .\" Colin Wood for the NetBSD Projet. .\" 4. The name of the author may not be used to endorse or promote products .\" derived from this software without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd August 31, 2018 .Dt ADB 4 .Os .Sh NAME .Nm adb .Nd Apple Desktop Bus driver .Sh SYNOPSIS .Cd "adb* at obio?" .Pp .Cd "options MRG_ADB" .Pp .In machine/adbsys.h .Sh DESCRIPTION The Apple Desktop Bus .Pq Tn ADB is the single-master, multiple-slave, low-speed serial bus interface used by Macintosh computers to connect input devices such as keyboards, mice, trackpads, trackballs, and graphics tablets to the machine. .Nx provides support for the Apple Desktop Bus as found on all supported mac68k models, as well as macppc models with on-board .Tn ADB (PowerBooks and .Dq Old World models). .Pp The .Nm driver accesses the .Tn ADB controller using the so-called .Dq HWDIRECT method. This method of access bypasses the Macintosh ROM and uses only .Nx routines for ADB access. This is the only method supported on macppc and is the default for mac68k systems. .Pp On mac68k systems there is an alternate method of accessing the .Tn ADB controller. With the Macintosh ROM Glue .Pq Tn MRG method, the routines written for MacOS are used. To enable this method of .Tn ADB access, uncomment the line: .Pp .Cd options MRG_ADB .Pp in your kernel configuration file. .Pp The .Xr ioctl 2 call is used to control the .Tn ADB event device. The following is a list of available .Xr ioctl 2 commands: .Bl -tag -width ADBIOC_GETREPEAT .It Dv ADBIOC_DEVSINFO Get .Tn ADB Device Info .Pp The .Nm event device will return an array of information containing an entry for each device connected to the bus. Each entry contains the current address, default address, and handler ID for the corresponding .Tn ADB device. .It Dv ADBIOC_GETREPEAT Get Keyboard Repeat Info .Pp Returns a structure containing the current keyboard repeat delay and keyboard repeat interval. .It Dv ADBIOC_SETREPEAT Set Keyboard Repeat Rate .Pp Sets the keyboard repeat delay and interval to the values specified by .Ar argp . .It Dv ADBIOC_RESET .Tn ADB Reset .Pp Perform a reset of the .Tn ADB which will reinitialize all of the devices attached to the bus. .It Dv ADBIOC_LISTENCMD ADB Listen Command .Pp Send data to the register of the .Tn ADB device specified by .Ar argp . This command is not fully implemented at this time. .El .Sh SUPPORTED DEVICES .Nx includes support for the following .Tn ADB devices, sorted by driver name: .Bl -tag -width akbd -offset indent .It abtn ADB mouse button? .It aed ADB event device .It akbd ADB keyboard .It ams ADB mouse .It apm APM emulation .El .Sh FILES .Bl -tag -width /dev/adb -compact .It Pa /dev/adb The .Tn ADB event device. .El .Sh DIAGNOSTICS .Bl -diag .It aed0 at adb0 addr 0: ADB Event device This is a normal autoconfiguration message noting the presence of the .Nm event device. .It adb0 at obio0 offset 0x16000 irq 18: 2 targets A standard autoconfiguration message indicating the initialization of the .Tn ADB subsystem. .It "adb: no devices found." No .Tn ADB devices were found to be connected to the bus during autoconfiguration. .It "adb: using %s series hardware support." Indicates the class of .Tn ADB hardware support the machine uses. .It "adb: hardware type unknown for this machine." The .Tn ADB hardware in this machine is currently unsupported. .It "adb: no ROM ADB driver in this kernel for this machine." The kernel lacks the necessary Macintosh ROM Glue .Pq Tn MRG support for accessing the .Tn ADB hardware on this machine. .It "adb: using serial console." A serial console will be used for user input rather than the .Tn ADB event device. .It "adb: %s at %d." An .Tn ADB device of the type specified by .Em %s has been found at location .Em %d . .El .Sh SEE ALSO .Xr aed 4 , .Xr akbd 4 , .Xr ams 4 , .Xr apm 4 .Sh HISTORY The .Nm interface first appeared in .Nx 0.9 . It has been under development ever since. .Sh AUTHORS .An -nosplit .An "Bradley A. Grantham" wrote the original .Nm driver, including the .Tn MRG support. The hardware direct interface was written by .An "John P. Wittkowski" . The PowerManager interface was written by .An "Takashi Hamada" . .Sh BUGS .Bl -bullet .It Not every class of .Tn ADB hardware is supported yet. .It The talk command is currently unimplemented. .It The listen command is not implemented yet. .It Not all multi-button mice are currently supported. .It Only mapped and relative-position .Tn ADB devices .Pq i.e. keyboards and mice are supported. Thus absolute-position and other exotic devices will not work. .It Some of the diagnostic messages in this man page need to be updated. .El .Pp Some mac68k machines contain so-called dirty ROM. These machines are the: Mac SE/30, Mac II, Mac IIx, and Mac IIcx. Machines with dirty ROM may experience trouble booting if the MRG code is used, especially under the following conditions: .Bl -bullet -compact -offset indent .It Both a keyboard and a mouse are not attached to the computer. .It An extended keyboard is attached to the computer. .El .Pp On (some) machines with dirty ROM, the ROM indicates the presence of a .Dq ghost keyboard or mouse. When this nonexistent device is probed for, the result is an infinite loop. This is believed to be triggered by the .Nm driver probing for extended mice, and non-EMP Logitech mice.