FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/esavar.h

     /* $NetBSD: esavar.h,v 1.4 2002/03/16 14:34:01 jmcneill Exp $ */
     
     /*
      * Copyright (c) 2001, 2002 Jared D. McNeill <jmcneill@invisible.yi.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * ESS Allegro-1 / Maestro3 Audio Driver
     * 
     * Based on the FreeBSD maestro3 driver
     *
     */
    
    /*
     * Number of simultaneous voices
     *
     * NOTE: The current code attaches audio0 thru audioESA_NUM_VOICES-1
     *       to this driver, and a lot of people probably don't want that.
     *       So, we'll default to 1 but we'll allow for the possibility of
     *       more.
     *
     * The current MINISRC image limits us to a maximum of 4 simultaneous voices.
     */
    #ifndef ESA_NUM_VOICES
    #define ESA_NUM_VOICES          1
    #endif
    
    #define KERNADDR(p)     ((void *)((p)->addr))
    #define DMAADDR(p)      ((p)->map->dm_segs[0].ds_addr)
    
    #define ESA_MINRATE     8000
    #define ESA_MAXRATE     48000
    
    struct esa_list {
            int                     currlen;
            int                     mem_addr;
            int                     max;
            int                     indexmap[ESA_NUM_VOICES * 2];
    };
    
    struct esa_dma {
            bus_dmamap_t            map;
            caddr_t                 addr;
            bus_dma_segment_t       segs[1];
            int                     nsegs;
            size_t                  size;
            struct esa_dma          *next;
    };
    
    struct esa_channel {
            int                     active;
            int                     data_offset;
            int                     index;
            size_t                  bufsize;
            int                     blksize;
            int                     pos;
            void                    *buf;
            u_int32_t               start;
            u_int32_t               count;
    
            /* mode settings */
            struct audio_params     mode;
            
            void                    (*intr)(void *);
            void                    *arg;
    };
    
    struct esa_voice {
            struct device           *parent;        /* pointer to our parent */
            struct esa_channel      play;
            struct esa_channel      rec;
            struct esa_dma          *dma;
            int                     inlist;
            int                     index;  /* 0: play, 1: record */
    };
    
    struct esa_softc
    {
           struct device           sc_dev;
           bus_space_tag_t         sc_iot;
           bus_space_handle_t      sc_ioh;
           bus_addr_t              sc_iob;
           bus_size_t              sc_ios;
   
           pcitag_t                sc_tag;
           pci_chipset_tag_t       sc_pct;
           bus_dma_tag_t           sc_dmat;
           pcireg_t                sc_pcireg;
   
           void                    *sc_ih;
   
           struct ac97_codec_if    *codec_if;
           struct ac97_host_if     host_if;
           enum ac97_host_flags    codec_flags;
   
           struct device           *sc_audiodev[ESA_NUM_VOICES];
   
           struct esa_voice        voice[ESA_NUM_VOICES];
           struct esa_dma          *sc_dmas;
           int                     count;
   
           /* timer management */
           int                     sc_ntimers;
   
           /* packed list structures */
           struct esa_list         mixer_list;
           struct esa_list         adc1_list;
           struct esa_list         dma_list;
           struct esa_list         msrc_list;
   
           int                     type;           /* Allegro-1 or Maestro 3? */
           int                     delay1, delay2;
   
           void                    *powerhook;
           u_int16_t               *savemem;
   };

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