1 /* $NetBSD: apcdmareg.h,v 1.3 2002/03/12 04:48:28 uwe Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * APC DMA hardware; from SunOS header 41 * Thanks to Derrick J. Brashear for additional info on the 42 * meaning of some of these bits. 43 */ 44 #ifndef _DEV_IC_APCDMAREG_H_ 45 #define _DEV_IC_APCDMAREG_H_ 46 47 struct apc_dma { 48 volatile u_int32_t dmacsr; /* APC CSR */ 49 volatile u_int32_t lpad[3]; /* */ 50 volatile u_int32_t dmacva; /* Capture Virtual Address */ 51 volatile u_int32_t dmacc; /* Capture Count */ 52 volatile u_int32_t dmacnva; /* Capture Next Virtual Address */ 53 volatile u_int32_t dmacnc; /* Capture next count */ 54 volatile u_int32_t dmapva; /* Playback Virtual Address */ 55 volatile u_int32_t dmapc; /* Playback Count */ 56 volatile u_int32_t dmapnva; /* Playback Next VAddress */ 57 volatile u_int32_t dmapnc; /* Playback Next Count */ 58 }; 59 60 /* 61 * APC CSR Register bit definitions 62 */ 63 #define APC_IP 0x00800000 /* Interrupt Pending */ 64 #define APC_PI 0x00400000 /* Playback interrupt */ 65 #define APC_CI 0x00200000 /* Capture interrupt */ 66 #define APC_EI 0x00100000 /* General interrupt */ 67 #define APC_IE 0x00080000 /* General ext int. enable */ 68 #define APC_PIE 0x00040000 /* Playback ext intr */ 69 #define APC_CIE 0x00020000 /* Capture ext intr */ 70 #define APC_EIE 0x00010000 /* Error ext intr */ 71 #define APC_PMI 0x00008000 /* Pipe empty interrupt */ 72 #define APC_PM 0x00004000 /* Play pipe empty */ 73 #define APC_PD 0x00002000 /* Playback NVA dirty */ 74 #define APC_PMIE 0x00001000 /* play pipe empty Int enable */ 75 #define APC_CM 0x00000800 /* Cap data dropped on floor */ 76 #define APC_CD 0x00000400 /* Capture NVA dirty */ 77 #define APC_CMI 0x00000200 /* Capture pipe empty interrupt */ 78 #define APC_CMIE 0x00000100 /* Cap. pipe empty int enable */ 79 #define APC_PPAUSE 0x00000080 /* Pause the play DMA */ 80 #define APC_CPAUSE 0x00000040 /* Pause the capture DMA */ 81 #define APC_CODEC_PDN 0x00000020 /* CODEC RESET */ 82 #define PDMA_GO 0x00000008 83 #define CDMA_GO 0x00000004 /* bit 2 of the csr */ 84 #define APC_RESET 0x00000001 /* Reset the chip */ 85 86 #define APC_BITS \ 87 "\20\30IP\27PI\26CI\25EI\24IE" \ 88 "\23PIE\22CIE\21EIE\20PMI\17PM\16PD\15PMIE" \ 89 "\14CM\13CD\12CMI\11CMIE\10PPAUSE\7CPAUSE\6PDN\4PGO\3CGO" 90 91 /* 92 * Note that when we program CSR, we should be careful to not 93 * accidentally clear any pending interrupt bits (a pending interrupt 94 * reads as 1 and writing back 1 will clear), so instead of 95 * 96 * dma->dmacsr |= bits; 97 * 98 * we should do 99 * 100 * temp = dma->dmacsr & ~APC_INTR_MASK; 101 * temp |= bits; 102 * dma->dmacsr = temp; 103 * 104 * When clearing bits, always add APC_INTR_MASK, i.e. 105 * 106 * dma->dmacsr &= ~(bits | APC_INTR_MASK); 107 */ 108 #define APC_INTR_MASK (APC_IP|APC_PI|APC_CI|APC_EI|APC_PMI|APC_CMI) 109 110 #endif /* _DEV_IC_APCDMAREG_H_ */ 111