1/* $Id: imx23_apbdma.h,v 1.1 2012/11/20 19:06:12 jkunz Exp $ */ 2 3/* 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Petri Laakso. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#ifndef _ARM_IMX_IMX23_APBDMA_H_ 33#define _ARM_IMX_IMX23_APBDMA_H_ 34 35#include <sys/cdefs.h> 36 37/* 38 * Public interface to apbdma for device drivers. 39 */ 40void * apbdma_dmamem_alloc(device_t, int, bus_size_t); 41 42/* 43 * Common definitions for both APBH and APBX DMA. 44 */ 45#define APBH_DMA_N_CHANNELS 8 46#define APBX_DMA_N_CHANNELS 16 47 48#define CMDPIOWORDS_MAX 3 49 50/* 51 * DMA command type. 52 */ 53#define NO_DMA_XFER 0 54#define DMA_WRITE 1 55#define DMA_READ 2 56#define DMA_SENSE 3 57 58/* 59 * Command word 0. 60 */ 61#define NEXTCMDADDR __BITS(31, 0) 62 63/* 64 * Command word 1. 65 */ 66#define XFER_COUNT __BITS(31, 16) 67#define CMDPIOWORDS __BITS(15, 12) 68#define CMDWORD1_RSVD0 __BITS(11, 8) 69#define WAIT4ENDCMD __BIT(7) 70#define SEMAPHORE __BIT(6) 71#define NANDWAIT4READY __BIT(5) 72#define NANDLOCK __BIT(4) 73#define IRQONCMPLT __BIT(3) 74#define CHAIN __BIT(2) 75#define COMMAND __BITS(1, 0) 76 77/* 78 * Command word 2. 79 */ 80#define BUF_ADDR __BITS(31, 0) 81 82/* 83 * Command word 3-n. 84 */ 85#define PIOWORD __BITS(31, 0) 86 87#endif /* !_ARM_IMX_IMX23_APBDMA_H_ */ 88