1 /* $NetBSD: iomd_dma.h,v 1.3 2009/03/14 14:45:55 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Scott Stevens 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Scott Stevens. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)dmavar.h 34 */ 35 36 /* 37 * dma structures 38 */ 39 40 struct dma_ctrl { 41 int dc_flags; 42 int dc_channel; 43 int dc_dmasize; 44 volatile u_int *dc_cura; 45 volatile u_int *dc_enda; 46 volatile u_int *dc_curb; 47 volatile u_int *dc_endb; 48 volatile u_char *dc_cr; 49 volatile u_char *dc_st; 50 51 u_char *dc_nextaddr; 52 int dc_len; 53 54 irqhandler_t dc_ih; 55 }; 56 57 #define DMA_FL_ACTIVE 0x01 58 #define DMA_FL_READY 0x02 59 60 #define DMA_CR_CLEAR 0x80 61 #define DMA_CR_DIR 0x40 62 #define DMA_CR_ENABLE 0x20 63 #define DMA_CR_INC 0x1f 64 65 #define DMA_ST_CHAN 0x01 66 #define DMA_ST_INT 0x02 67 #define DMA_ST_OVER 0x04 68 #define DMA_ST_MASK (DMA_ST_CHAN | DMA_ST_INT | DMA_ST_OVER) 69 70 #define DMA_END_STOP 0x80000000 71 #define DMA_END_LAST 0x40000000 72 73 /* Prototypes */ 74 struct dma_ctrl *dma_init(int, int, int, int); 75 void dma_go(struct dma_ctrl *); 76 int dma_reset(struct dma_ctrl *); 77 int dma_setup(struct dma_ctrl *, u_char *, int, int); 78 int dma_isactive(struct dma_ctrl *); 79 int dma_isintr(struct dma_ctrl *); 80 int dma_intr(void *); 81