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apcdmareg.h revision 1.3 
      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