| /* |
| * Intel Multimedia Timer device interface |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (c) 2001-2004 Silicon Graphics, Inc. All rights reserved. |
| * |
| * This file should define an interface compatible with the IA-PC Multimedia |
| * Timers Draft Specification (rev. 0.97) from Intel. Note that some |
| * hardware may not be able to safely export its registers to userspace, |
| * so the ioctl interface should support all necessary functionality. |
| * |
| * 11/01/01 - jbarnes - initial revision |
| * 9/10/04 - Christoph Lameter - remove interrupt support |
| * 9/17/04 - jbarnes - remove test program, move some #defines to the driver |
| */ |
| |
| #ifndef _LINUX_MMTIMER_H |
| #define _LINUX_MMTIMER_H |
| |
| /* |
| * Breakdown of the ioctl's available. An 'optional' next to the command |
| * indicates that supporting this command is optional, while 'required' |
| * commands must be implemented if conformance is desired. |
| * |
| * MMTIMER_GETOFFSET - optional |
| * Should return the offset (relative to the start of the page where the |
| * registers are mapped) for the counter in question. |
| * |
| * MMTIMER_GETRES - required |
| * The resolution of the clock in femto (10^-15) seconds |
| * |
| * MMTIMER_GETFREQ - required |
| * Frequency of the clock in Hz |
| * |
| * MMTIMER_GETBITS - required |
| * Number of bits in the clock's counter |
| * |
| * MMTIMER_MMAPAVAIL - required |
| * Returns nonzero if the registers can be mmap'd into userspace, 0 otherwise |
| * |
| * MMTIMER_GETCOUNTER - required |
| * Gets the current value in the counter |
| */ |
| #define MMTIMER_IOCTL_BASE 'm' |
| |
| #define MMTIMER_GETOFFSET _IO(MMTIMER_IOCTL_BASE, 0) |
| #define MMTIMER_GETRES _IOR(MMTIMER_IOCTL_BASE, 1, unsigned long) |
| #define MMTIMER_GETFREQ _IOR(MMTIMER_IOCTL_BASE, 2, unsigned long) |
| #define MMTIMER_GETBITS _IO(MMTIMER_IOCTL_BASE, 4) |
| #define MMTIMER_MMAPAVAIL _IO(MMTIMER_IOCTL_BASE, 6) |
| #define MMTIMER_GETCOUNTER _IOR(MMTIMER_IOCTL_BASE, 9, unsigned long) |
| |
| #endif /* _LINUX_MMTIMER_H */ |