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iopaauvar.h revision 1.2 
      1 /*	$NetBSD: iopaauvar.h,v 1.2 2002/08/02 06:52:17 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2002 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #ifndef _XSCALE_IOPAAUVAR_H_
     39 #define	_XSCALE_IOPAAUVAR_H_
     40 
     41 #include <dev/dmover/dmovervar.h>
     42 
     43 #define	AAU_MAX_INPUTS		4
     44 
     45 /*
     46  * Due to the way the AAU's descriptors work, the DMA segments for
     47  * the inputs and output must all be the same length.  For now, we
     48  * will enforce this by requiring all I/O to be page aligned, and
     49  * and not let it cross a page boundary.
     50  *
     51  * We could easily shrink this to any power of two.
     52  */
     53 #define	AAU_IO_BOUNDARY		4096
     54 
     55 struct iopaau_softc {
     56 	struct device sc_dev;
     57 	struct dmover_backend sc_dmb;
     58 
     59 	struct dmover_request *sc_running;
     60 
     61 	bus_space_tag_t sc_st;
     62 	bus_space_handle_t sc_sh;
     63 	bus_dma_tag_t sc_dmat;
     64 
     65 	void *sc_firstdesc;
     66 	void *sc_lastdesc;
     67 	uint32_t sc_firstdesc_pa;
     68 
     69 	bus_dmamap_t sc_map_out;
     70 	bus_dmamap_t sc_map_in[AAU_MAX_INPUTS];
     71 };
     72 
     73 struct iopaau_function {
     74 	int	(*af_setup)(struct iopaau_softc *, struct dmover_request *);
     75 	void	(*af_free)(struct iopaau_softc *, void *);
     76 };
     77 
     78 void	iopaau_attach(struct iopaau_softc *);
     79 void	iopaau_process(struct dmover_backend *);
     80 int	iopaau_intr(void *);
     81 
     82 int	iopaau_func_zero_setup(struct iopaau_softc *,
     83 	    struct dmover_request *);
     84 int	iopaau_func_fill8_setup(struct iopaau_softc *,
     85 	    struct dmover_request *);
     86 int	iopaau_func_xor_1_4_setup(struct iopaau_softc *,
     87 	    struct dmover_request *);
     88 
     89 void	iopaau_desc_4_free(struct iopaau_softc *, void *);
     90 
     91 #endif /* _XSCALE_IOPAAUVAR_H_ */
     92