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apcdmareg.h revision 1.3.12.2 
      1 /*	$NetBSD: apcdmareg.h,v 1.3.12.2 2004/09/18 14:45:56 skrll 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 /* same as above but as offsets for bus_space ops */
     61 #define APC_DMA_CSR	0
     62 #define APC_DMA_CVA	16
     63 #define APC_DMA_CC	20
     64 #define APC_DMA_CNVA	24
     65 #define APC_DMA_CNC	28
     66 #define APC_DMA_PVA	32
     67 #define APC_DMA_PC	36
     68 #define APC_DMA_PNVA	40
     69 #define APC_DMA_PNC	44
     70 
     71 #define APC_DMA_SIZE	48
     72 
     73 /*
     74  * APC CSR Register bit definitions
     75  */
     76 #define	APC_IP		0x00800000	/* Interrupt Pending */
     77 #define	APC_PI		0x00400000	/* Playback interrupt */
     78 #define	APC_CI		0x00200000	/* Capture interrupt */
     79 #define	APC_EI		0x00100000	/* General interrupt */
     80 #define	APC_IE		0x00080000	/* General ext int. enable */
     81 #define	APC_PIE		0x00040000	/* Playback ext intr */
     82 #define	APC_CIE		0x00020000	/* Capture ext intr */
     83 #define	APC_EIE		0x00010000	/* Error ext intr */
     84 #define	APC_PMI		0x00008000	/* Pipe empty interrupt */
     85 #define	APC_PM		0x00004000	/* Play pipe empty */
     86 #define	APC_PD		0x00002000	/* Playback NVA dirty */
     87 #define	APC_PMIE	0x00001000	/* play pipe empty Int enable */
     88 #define	APC_CM		0x00000800	/* Cap data dropped on floor */
     89 #define	APC_CD		0x00000400	/* Capture NVA dirty */
     90 #define	APC_CMI		0x00000200	/* Capture pipe empty interrupt */
     91 #define	APC_CMIE	0x00000100	/* Cap. pipe empty int enable */
     92 #define	APC_PPAUSE	0x00000080	/* Pause the play DMA */
     93 #define	APC_CPAUSE	0x00000040	/* Pause the capture DMA */
     94 #define	APC_CODEC_PDN   0x00000020	/* CODEC RESET */
     95 #define	PDMA_GO		0x00000008
     96 #define	CDMA_GO		0x00000004	/* bit 2 of the csr */
     97 #define	APC_RESET	0x00000001	/* Reset the chip */
     98 
     99 #define APC_BITS					\
    100 	"\20\30IP\27PI\26CI\25EI\24IE"			\
    101 	"\23PIE\22CIE\21EIE\20PMI\17PM\16PD\15PMIE"	\
    102 	"\14CM\13CD\12CMI\11CMIE\10PPAUSE\7CPAUSE\6PDN\4PGO\3CGO"
    103 
    104 /*
    105  * Note that when we program CSR, we should be careful to not
    106  * accidentally clear any pending interrupt bits (a pending interrupt
    107  * reads as 1 and writing back 1 will clear), so instead of
    108  *
    109  *     dma->dmacsr |= bits;
    110  *
    111  * we should do
    112  *
    113  *     temp = dma->dmacsr & ~APC_INTR_MASK;
    114  *     temp |= bits;
    115  *     dma->dmacsr = temp;
    116  *
    117  * When clearing bits, always add APC_INTR_MASK, i.e.
    118  *
    119  *     dma->dmacsr &= ~(bits | APC_INTR_MASK);
    120  */
    121 #define APC_INTR_MASK	(APC_IP|APC_PI|APC_CI|APC_EI|APC_PMI|APC_CMI)
    122 
    123 #endif /* _DEV_IC_APCDMAREG_H_ */
    124