sys/arch/arm/xscale/iopaauvar.h

   1 /*      $NetBSD$        */
   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 <sys/pool.h>
  42 #include <dev/dmover/dmovervar.h>
  43
  44 #define AAU_MAX_INPUTS          8
  45
  46 /*
  47  * Due to the way the AAU's descriptors work, the DMA segments for
  48  * the inputs and output must all be the same length.  For now, we
  49  * will enforce this by requiring all I/O to be page aligned, and
  50  * and not let it cross a page boundary.
  51  *
  52  * We could easily shrink this to any power of two.
  53  */
  54 #define AAU_IO_BOUNDARY         4096
  55
  56 struct iopaau_softc {
  57         struct device sc_dev;
  58         struct dmover_backend sc_dmb;
  59
  60         struct dmover_request *sc_running;
  61
  62         bus_space_tag_t sc_st;
  63         bus_space_handle_t sc_sh;
  64         bus_dma_tag_t sc_dmat;
  65
  66         void *sc_firstdesc;
  67         void *sc_lastdesc;
  68         uint32_t sc_firstdesc_pa;
  69
  70         bus_dmamap_t sc_map_out;
  71         bus_dmamap_t sc_map_in[AAU_MAX_INPUTS];
  72 };
  73
  74 struct iopaau_function {
  75         int     (*af_setup)(struct iopaau_softc *, struct dmover_request *);
  76         pool_cache_t af_desc_cache;
  77 };
  78
  79 extern pool_cache_t iopaau_desc_4_cache;
  80 extern pool_cache_t iopaau_desc_8_cache;
  81
  82 void    iopaau_attach(struct iopaau_softc *);
  83 void    iopaau_process(struct dmover_backend *);
  84 int     iopaau_intr(void *);
  85
  86 int     iopaau_func_zero_setup(struct iopaau_softc *,
  87             struct dmover_request *);
  88 int     iopaau_func_fill8_setup(struct iopaau_softc *,
  89             struct dmover_request *);
  90 int     iopaau_func_xor_setup(struct iopaau_softc *,
  91             struct dmover_request *);
  92
  93 void    iopaau_desc_free(pool_cache_t, void *);
  94
  95 #endif /* _XSCALE_IOPAAUVAR_H_ */