Home | History | Annotate | Line # | Download | only in imx 
      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