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 */ 40 void * 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