1*f80ad8b4SAndroid Build Coastguard Worker /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*f80ad8b4SAndroid Build Coastguard Worker /* 3*f80ad8b4SAndroid Build Coastguard Worker * Intel Multimedia Timer device interface 4*f80ad8b4SAndroid Build Coastguard Worker * 5*f80ad8b4SAndroid Build Coastguard Worker * This file is subject to the terms and conditions of the GNU General Public 6*f80ad8b4SAndroid Build Coastguard Worker * License. See the file "COPYING" in the main directory of this archive 7*f80ad8b4SAndroid Build Coastguard Worker * for more details. 8*f80ad8b4SAndroid Build Coastguard Worker * 9*f80ad8b4SAndroid Build Coastguard Worker * Copyright (c) 2001-2004 Silicon Graphics, Inc. All rights reserved. 10*f80ad8b4SAndroid Build Coastguard Worker * 11*f80ad8b4SAndroid Build Coastguard Worker * This file should define an interface compatible with the IA-PC Multimedia 12*f80ad8b4SAndroid Build Coastguard Worker * Timers Draft Specification (rev. 0.97) from Intel. Note that some 13*f80ad8b4SAndroid Build Coastguard Worker * hardware may not be able to safely export its registers to userspace, 14*f80ad8b4SAndroid Build Coastguard Worker * so the ioctl interface should support all necessary functionality. 15*f80ad8b4SAndroid Build Coastguard Worker * 16*f80ad8b4SAndroid Build Coastguard Worker * 11/01/01 - jbarnes - initial revision 17*f80ad8b4SAndroid Build Coastguard Worker * 9/10/04 - Christoph Lameter - remove interrupt support 18*f80ad8b4SAndroid Build Coastguard Worker * 9/17/04 - jbarnes - remove test program, move some #defines to the driver 19*f80ad8b4SAndroid Build Coastguard Worker */ 20*f80ad8b4SAndroid Build Coastguard Worker 21*f80ad8b4SAndroid Build Coastguard Worker #ifndef _LINUX_MMTIMER_H 22*f80ad8b4SAndroid Build Coastguard Worker #define _LINUX_MMTIMER_H 23*f80ad8b4SAndroid Build Coastguard Worker 24*f80ad8b4SAndroid Build Coastguard Worker /* 25*f80ad8b4SAndroid Build Coastguard Worker * Breakdown of the ioctl's available. An 'optional' next to the command 26*f80ad8b4SAndroid Build Coastguard Worker * indicates that supporting this command is optional, while 'required' 27*f80ad8b4SAndroid Build Coastguard Worker * commands must be implemented if conformance is desired. 28*f80ad8b4SAndroid Build Coastguard Worker * 29*f80ad8b4SAndroid Build Coastguard Worker * MMTIMER_GETOFFSET - optional 30*f80ad8b4SAndroid Build Coastguard Worker * Should return the offset (relative to the start of the page where the 31*f80ad8b4SAndroid Build Coastguard Worker * registers are mapped) for the counter in question. 32*f80ad8b4SAndroid Build Coastguard Worker * 33*f80ad8b4SAndroid Build Coastguard Worker * MMTIMER_GETRES - required 34*f80ad8b4SAndroid Build Coastguard Worker * The resolution of the clock in femto (10^-15) seconds 35*f80ad8b4SAndroid Build Coastguard Worker * 36*f80ad8b4SAndroid Build Coastguard Worker * MMTIMER_GETFREQ - required 37*f80ad8b4SAndroid Build Coastguard Worker * Frequency of the clock in Hz 38*f80ad8b4SAndroid Build Coastguard Worker * 39*f80ad8b4SAndroid Build Coastguard Worker * MMTIMER_GETBITS - required 40*f80ad8b4SAndroid Build Coastguard Worker * Number of bits in the clock's counter 41*f80ad8b4SAndroid Build Coastguard Worker * 42*f80ad8b4SAndroid Build Coastguard Worker * MMTIMER_MMAPAVAIL - required 43*f80ad8b4SAndroid Build Coastguard Worker * Returns nonzero if the registers can be mmap'd into userspace, 0 otherwise 44*f80ad8b4SAndroid Build Coastguard Worker * 45*f80ad8b4SAndroid Build Coastguard Worker * MMTIMER_GETCOUNTER - required 46*f80ad8b4SAndroid Build Coastguard Worker * Gets the current value in the counter 47*f80ad8b4SAndroid Build Coastguard Worker */ 48*f80ad8b4SAndroid Build Coastguard Worker #define MMTIMER_IOCTL_BASE 'm' 49*f80ad8b4SAndroid Build Coastguard Worker 50*f80ad8b4SAndroid Build Coastguard Worker #define MMTIMER_GETOFFSET _IO(MMTIMER_IOCTL_BASE, 0) 51*f80ad8b4SAndroid Build Coastguard Worker #define MMTIMER_GETRES _IOR(MMTIMER_IOCTL_BASE, 1, unsigned long) 52*f80ad8b4SAndroid Build Coastguard Worker #define MMTIMER_GETFREQ _IOR(MMTIMER_IOCTL_BASE, 2, unsigned long) 53*f80ad8b4SAndroid Build Coastguard Worker #define MMTIMER_GETBITS _IO(MMTIMER_IOCTL_BASE, 4) 54*f80ad8b4SAndroid Build Coastguard Worker #define MMTIMER_MMAPAVAIL _IO(MMTIMER_IOCTL_BASE, 6) 55*f80ad8b4SAndroid Build Coastguard Worker #define MMTIMER_GETCOUNTER _IOR(MMTIMER_IOCTL_BASE, 9, unsigned long) 56*f80ad8b4SAndroid Build Coastguard Worker 57*f80ad8b4SAndroid Build Coastguard Worker #endif /* _LINUX_MMTIMER_H */ 58