NetBSD/sys/dev/ic/apcdmareg.h

113 lines
4.8 KiB
C

/* $NetBSD: apcdmareg.h,v 1.2 2000/06/16 11:47:34 pk Exp $ */
/*-
* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* APC DMA hardware; from SunOS header
* Thanks to Derrick J. Brashear for additional info on the
* meaning of some of these bits.
*/
struct apc_dma {
volatile u_int32_t dmacsr; /* APC CSR */
volatile u_int32_t lpad[3]; /* */
volatile u_int32_t dmacva; /* Capture Virtual Address */
volatile u_int32_t dmacc; /* Capture Count */
volatile u_int32_t dmacnva; /* Capture Next Virtual Address */
volatile u_int32_t dmacnc; /* Capture next count */
volatile u_int32_t dmapva; /* Playback Virtual Address */
volatile u_int32_t dmapc; /* Playback Count */
volatile u_int32_t dmapnva; /* Playback Next VAddress */
volatile u_int32_t dmapnc; /* Playback Next Count */
};
/*
* APC CSR Register bit definitions
*/
#define APC_IP 0x00800000 /* Interrupt Pending */
#define APC_PI 0x00400000 /* Playback interrupt */
#define APC_CI 0x00200000 /* Capture interrupt */
#define APC_EI 0x00100000 /* General interrupt */
#define APC_IE 0x00080000 /* General ext int. enable */
#define APC_PIE 0x00040000 /* Playback ext intr */
#define APC_CIE 0x00020000 /* Capture ext intr */
#define APC_EIE 0x00010000 /* Error ext intr */
#define APC_PMI 0x00008000 /* Pipe empty interrupt */
#define APC_PM 0x00004000 /* Play pipe empty */
#define APC_PD 0x00002000 /* Playback NVA dirty */
#define APC_PMIE 0x00001000 /* play pipe empty Int enable */
#define APC_CM 0x00000800 /* Cap data dropped on floor */
#define APC_CD 0x00000400 /* Capture NVA dirty */
#define APC_CMI 0x00000200 /* Capture pipe empty interrupt */
#define APC_CMIE 0x00000100 /* Cap. pipe empty int enable */
#define APC_PPAUSE 0x00000080 /* Pause the play DMA */
#define APC_CPAUSE 0x00000040 /* Pause the capture DMA */
#define APC_CODEC_PDN 0x00000020 /* CODEC RESET */
#define PDMA_GO 0x00000008
#define CDMA_GO 0x00000004 /* bit 2 of the csr */
#define APC_RESET 0x00000001 /* Reset the chip */
#define APC_BITS \
"\20\30IP\27PI\26CI\25EI\24IE" \
"\23PIE\22CIE\21EIE\20PMI\17PM\16PD\15PMIE" \
"\14CM\13CD\12CMI\11CMIE\10PPAUSE\7CPAUSE\6PDN\4PGO\3CGO"
/*
* To start DMA, you write to dma[cp]nva and dma[cp]nc and set [CP]DMA_GO
* in dmacsr. dma[cp]va and dma[cp]c, when read, appear to be the live
* counter as the DMA operation progresses.
* Supposedly, you get an interrupt with the "dirty" bits (APC_PD,APC_CD)
* set, when the next DMA buffer can be programmed, while the current one
* is still in progress. We don't currently use this feature, since I
* haven't been able to make it work.. instead the next buffer goes in
* as soon as we see a "pipe empty" (APC_PM) interrupt.
*/
/* It's not clear if there's a maximum DMA size.. */
#define APC_MAX (sc->sc_blksz)/*(16*1024)*/
/*
* List of device memory allocations (see cs4231_malloc/cs4231_free).
*/
struct cs_dma {
struct cs_dma *next;
caddr_t addr;
bus_dmamap_t dmamap;
bus_dma_segment_t segs[1];
int nsegs;
size_t size;
};