FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/atppc_puc.c

     /* $NetBSD: atppc_puc.c,v 1.2 2004/02/10 18:19:47 jdolecek Exp $ */
     
     /*-
      * Copyright (c) 2004 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Jaromir Dolecek.
      *
     * 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. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``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 FOUNDATION OR CONTRIBUTORS
     * 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.
     */
    
    #include "opt_atppc.h"
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: atppc_puc.c,v 1.2 2004/02/10 18:19:47 jdolecek Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/errno.h>
    #include <sys/ioctl.h>
    #include <sys/syslog.h>
    #include <sys/device.h>
    #include <sys/proc.h>
    #include <sys/termios.h>
    
    #include <machine/bus.h>
    #include <uvm/uvm_extern.h>
    
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pucvar.h>
    
    #include <dev/ic/atppcvar.h>
    
    static int      atppc_puc_match(struct device *, struct cfdata *, void *);
    static void     atppc_puc_attach(struct device *, struct device *, void *);
    
    struct atppc_puc_softc {
            /* Machine independent device data */
            struct atppc_softc sc_atppc;
    
            bus_dmamap_t sc_dmamap;
    };
            
    CFATTACH_DECL(atppc_puc, sizeof(struct atppc_puc_softc), atppc_puc_match,
        atppc_puc_attach, NULL, NULL);
    
    static int atppc_puc_dma_setup(struct atppc_puc_softc *);
    static int atppc_puc_dma_start(struct atppc_softc *, void *, u_int, 
            u_int8_t);
    static int atppc_puc_dma_finish(struct atppc_softc *);
    static int atppc_puc_dma_abort(struct atppc_softc *);
    static int atppc_puc_dma_malloc(struct device *, caddr_t *, bus_addr_t *, 
            bus_size_t);
    static void atppc_puc_dma_free(struct device *, caddr_t *, bus_addr_t *, 
            bus_size_t);
    
    /*
     * atppc_acpi_match: autoconf(9) match routine
     */
    static int
    atppc_puc_match(struct device *parent, struct cfdata *match, void *aux)
    {
            struct puc_attach_args *aa = aux;
    
            /*
             * Locators already matched, just check the type.
             */
            if (aa->type != PUC_PORT_TYPE_LPT)
                    return (0);
    
            return (1);
    }
   
   static void
   atppc_puc_attach(struct device *parent, struct device *self, void *aux)
   {
           struct atppc_softc *sc = (struct atppc_softc *) self;
           struct atppc_puc_softc *psc = (struct atppc_puc_softc *) self;
           struct puc_attach_args *aa = aux;
           const char *intrstr;
   
           sc->sc_dev_ok = ATPPC_NOATTACH;
   
           printf(": AT Parallel Port\n");
   
           /* Attach */
           sc->sc_iot = aa->t;
           sc->sc_ioh = aa->h;
           sc->sc_dmat = aa->dmat;
           sc->sc_has = 0;
   
           intrstr = pci_intr_string(aa->pc, aa->intrhandle);
           sc->sc_ieh = pci_intr_establish(aa->pc, aa->intrhandle, IPL_TTY,
               atppcintr, sc);
           if (sc->sc_ieh == NULL) {
                   printf("%s: couldn't establish interrupt",
                       sc->sc_dev.dv_xname);
                   if (intrstr != NULL)
                           printf(" at %s", intrstr);
                   printf("\n");
                   return;
           }
           printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
           sc->sc_has |= ATPPC_HAS_INTR;
   
           /* setup DMA hooks */
           if (atppc_puc_dma_setup(psc) == 0) {
                   sc->sc_has |= ATPPC_HAS_DMA;
                   sc->sc_dma_start = atppc_puc_dma_start;
                   sc->sc_dma_finish = atppc_puc_dma_finish;
                   sc->sc_dma_abort = atppc_puc_dma_abort;
                   sc->sc_dma_malloc = atppc_puc_dma_malloc;
                   sc->sc_dma_free = atppc_puc_dma_free;
           }
   
           /* Finished attach */
           sc->sc_dev_ok = ATPPC_ATTACHED;
   
           /* Run soft configuration attach */
           atppc_sc_attach(sc);
   }
   
   /* Setup DMA structures */
   static int
   atppc_puc_dma_setup(struct atppc_puc_softc *psc)
   {
           return EOPNOTSUPP;      /* XXX DMA not tested yet */
   #if 0
           struct atppc_softc *sc = (struct atppc_softc *)psc;
           int error;
   
   #define BUFSIZE PAGE_SIZE       /* XXX see lptvar.h */
           if ((error = bus_dmamap_create(sc->sc_dmat, BUFSIZE, 1, BUFSIZE, 0,
               BUS_DMA_NOWAIT, &psc->sc_dmamap)))
                   return error;
           
           return (0);
   #endif
   }
   
   /* Start DMA operation over PCI bus */
   static int 
   atppc_puc_dma_start(struct atppc_softc *dev, void *buf, u_int nbytes,
           u_int8_t mode)
   {
           struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
           struct atppc_softc *sc = &psc->sc_atppc;
   
           bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0, nbytes,
               (mode == ATPPC_DMA_MODE_WRITE) ? BUS_DMASYNC_PREWRITE
                           : BUS_DMASYNC_PREREAD);
   
           return (0);
   }
   
   /* Stop DMA operation over PCI bus */
   static int 
   atppc_puc_dma_finish(struct atppc_softc *dev)
   {
   
           struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
           struct atppc_softc *sc = &psc->sc_atppc;
   
           /*
            * We don't know direction of DMA, so sync both. We can safely
            *  assume the dma map is loaded.
            */
           bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0,
               psc->sc_dmamap->dm_segs[0].ds_len,
               BUS_DMASYNC_POSTWRITE|BUS_DMASYNC_POSTREAD);
   
           return (0);
   }
   
   /* Abort DMA operation over PCI bus */
   int 
   atppc_puc_dma_abort(struct atppc_softc * lsc)
   {
   
           /* Nothing to do - we do not need to sync, op is aborted */
           return (0);
   }
   
   /* Allocate memory for DMA over PCI bus */ 
   int
   atppc_puc_dma_malloc(struct device *dev, caddr_t *buf, bus_addr_t *bus_addr,
           bus_size_t size)
   {
           struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
           struct atppc_softc *sc = &psc->sc_atppc;
           int error;
   
           error = bus_dmamap_load(sc->sc_dmat, psc->sc_dmamap, *buf, size,
               NULL /* kernel address */, BUS_DMA_WAITOK|BUS_DMA_STREAMING);
           if (error)
                   return (error);
   
           *bus_addr = psc->sc_dmamap->dm_segs[0].ds_addr;
           return (0);
   }
   
   /* Free memory allocated by atppc_isa_dma_malloc() */ 
   void 
   atppc_puc_dma_free(struct device *dev, caddr_t *buf, bus_addr_t *bus_addr, 
           bus_size_t size)
   {
           struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
           struct atppc_softc *sc = &psc->sc_atppc;
   
           return (bus_dmamap_unload(sc->sc_dmat, psc->sc_dmamap));
   }

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