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98 lines
2.4 KiB
Objective-C
98 lines
2.4 KiB
Objective-C
#-
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# Copyright (c) 2016 Jared D. McNeill <jmcneill@invisible.ca>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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#
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#include <sys/bus.h>
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INTERFACE sunxi_dma;
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HEADER {
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#include <machine/bus.h>
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struct sunxi_dma_config {
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unsigned int dst_width;
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unsigned int dst_burst_len;
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unsigned int dst_drqtype;
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bool dst_noincr;
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unsigned int dst_blksize; /* DDMA-only */
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unsigned int dst_wait_cyc; /* DDMA-only */
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unsigned int src_width;
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unsigned int src_burst_len;
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unsigned int src_drqtype;
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bool src_noincr;
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unsigned int src_blksize; /* DDMA-only */
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unsigned int src_wait_cyc; /* DDMA-only */
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};
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typedef void (*sunxi_dma_callback)(void *);
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}
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#
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# Allocate DMA channel
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#
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METHOD void * alloc {
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device_t dev;
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bool dedicated;
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sunxi_dma_callback callback;
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void *callback_arg;
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};
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#
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# Free DMA channel
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#
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METHOD void free {
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device_t dev;
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void *dmachan;
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};
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#
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# Set DMA channel configuration
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#
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METHOD int set_config {
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device_t dev;
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void *dmachan;
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const struct sunxi_dma_config *cfg;
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};
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#
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# Start DMA channel transfer
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#
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METHOD int transfer {
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device_t dev;
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void *dmachan;
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bus_addr_t src;
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bus_addr_t dst;
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size_t nbytes;
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};
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#
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# Halt DMA channel transfer
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#
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METHOD void halt {
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device_t dev;
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void *dmachan;
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};
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