sunxi_dma_if.m

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    1 #-
    2 # Copyright (c) 2016 Jared D. McNeill <jmcneill@invisible.ca>
    3 # All rights reserved.
    4 #
    5 # Redistribution and use in source and binary forms, with or without
    6 # modification, are permitted provided that the following conditions
    7 # are met:
    8 # 1. Redistributions of source code must retain the above copyright
    9 #    notice, this list of conditions and the following disclaimer.
   10 # 2. Redistributions in binary form must reproduce the above copyright
   11 #    notice, this list of conditions and the following disclaimer in the
   12 #    documentation and/or other materials provided with the distribution.
   13 #
   14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24 # SUCH DAMAGE.
   25 #
   26 # $FreeBSD$
   27 #
   28 
   29 #include <sys/bus.h>
   30 
   31 INTERFACE sunxi_dma;
   32 
   33 HEADER {
   34         #include <machine/bus.h>
   35 
   36         struct sunxi_dma_config {
   37                 unsigned int dst_width;
   38                 unsigned int dst_burst_len;
   39                 unsigned int dst_drqtype;
   40                 bool dst_noincr;
   41                 unsigned int dst_blksize;       /* DDMA-only */
   42                 unsigned int dst_wait_cyc;      /* DDMA-only */
   43                 unsigned int src_width;
   44                 unsigned int src_burst_len;
   45                 unsigned int src_drqtype;
   46                 bool src_noincr;
   47                 unsigned int src_blksize;       /* DDMA-only */
   48                 unsigned int src_wait_cyc;      /* DDMA-only */
   49         };
   50 
   51         typedef void (*sunxi_dma_callback)(void *);
   52 }
   53 
   54 #
   55 # Allocate DMA channel
   56 #
   57 METHOD void * alloc {
   58         device_t dev;
   59         bool dedicated;
   60         sunxi_dma_callback callback;
   61         void *callback_arg;
   62 };
   63 
   64 #
   65 # Free DMA channel
   66 #
   67 METHOD void free {
   68         device_t dev;
   69         void *dmachan;
   70 };
   71 
   72 #
   73 # Set DMA channel configuration
   74 #
   75 METHOD int set_config {
   76         device_t dev;
   77         void *dmachan;
   78         const struct sunxi_dma_config *cfg;
   79 };
   80 
   81 #
   82 # Start DMA channel transfer
   83 #
   84 METHOD int transfer {
   85         device_t dev;
   86         void *dmachan;
   87         bus_addr_t src;
   88         bus_addr_t dst;
   89         size_t nbytes;
   90 };
   91 
   92 #
   93 # Halt DMA channel transfer
   94 #
   95 METHOD void halt {
   96         device_t dev;
   97         void *dmachan;
   98 };

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FreeBSD/Linux Kernel Cross Reference sys/arm/allwinner/sunxi_dma_if.m

FreeBSD/Linux Kernel Cross Reference
sys/arm/allwinner/sunxi_dma_if.m