FreeBSD/Linux Kernel Cross Reference
sys/dev/isa/wdc_isa.c

     /*      $OpenBSD: wdc_isa.c,v 1.17 2022/04/06 18:59:29 naddy Exp $     */
     /*      $NetBSD: wdc_isa.c,v 1.15 1999/05/19 14:41:25 bouyer Exp $ */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum and by Onno van der Linden.
     *
     * 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.
     *
     * 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 <sys/param.h>
    #include <sys/systm.h>
    #include <sys/device.h>
    #include <sys/malloc.h>
    
    #include <machine/bus.h>
    #include <machine/intr.h>
    
    #include <dev/isa/isavar.h>
    #include <dev/isa/isadmavar.h>
    
    #include <dev/ata/atavar.h>
    #include <dev/ic/wdcvar.h>
    
    #include "isadma.h"
    
    #define WDC_ISA_REG_NPORTS      8
    #define WDC_ISA_AUXREG_OFFSET   0x206
    #define WDC_ISA_AUXREG_NPORTS   1 /* XXX "fdc" owns ports 0x3f7/0x377 */
    
    /* options passed via the 'flags' config keyword */
    #define WDC_OPTIONS_32  0x01 /* try to use 32bit data I/O */
    
    struct wdc_isa_softc {
            struct  wdc_softc sc_wdcdev;
            struct  channel_softc *wdc_chanptr;
            struct  channel_softc wdc_channel;
            struct  device *sc_isa;
            isa_chipset_tag_t sc_ic;
            void    *sc_ih;
            int     sc_drq;
    };
    
    int     wdc_isa_probe(struct device *, void *, void *);
    void    wdc_isa_attach(struct device *, struct device *, void *);
    
    const struct cfattach wdc_isa_ca = {
            sizeof(struct wdc_isa_softc), wdc_isa_probe, wdc_isa_attach
    };
    
    #if NISADMA > 0
    static void     wdc_isa_dma_setup(struct wdc_isa_softc *);
    static int      wdc_isa_dma_init(void *, int, int, void *, size_t, int);
    static void     wdc_isa_dma_start(void *, int, int);
    static int      wdc_isa_dma_finish(void *, int, int, int);
    #endif  /* NISADMA > 0 */
    
    int
    wdc_isa_probe(struct device *parent, void *match, void *aux)
    {
            struct channel_softc ch;
            struct isa_attach_args *ia = aux;
            struct cfdata *cf = ((struct device *)match)->dv_cfdata;
            int result = 0;
    
            bzero(&ch, sizeof ch);
            ch.cmd_iot = ia->ia_iot;
            if (bus_space_map(ch.cmd_iot, ia->ia_iobase, WDC_ISA_REG_NPORTS, 0,
                &ch.cmd_ioh))
                    goto out;
    
            ch.ctl_iot = ia->ia_iot;
            if (bus_space_map(ch.ctl_iot, ia->ia_iobase + WDC_ISA_AUXREG_OFFSET,
                WDC_ISA_AUXREG_NPORTS, 0, &ch.ctl_ioh))
                    goto outunmap;
    
            if (cf->cf_flags & WDC_OPTION_PROBE_VERBOSE)
                   ch.ch_flags |= WDCF_VERBOSE_PROBE;
   
           result = wdcprobe(&ch);
           if (result) {
                   ia->ia_iosize = WDC_ISA_REG_NPORTS;
                   ia->ia_msize = 0;
           }
   
           bus_space_unmap(ch.ctl_iot, ch.ctl_ioh, WDC_ISA_AUXREG_NPORTS);
   outunmap:
           bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, WDC_ISA_REG_NPORTS);
   out:
           return (result);
   }
   
   void
   wdc_isa_attach(struct device *parent, struct device *self, void *aux)
   {
           struct wdc_isa_softc *sc = (void *)self;
           struct isa_attach_args *ia = aux;
   
           printf("\n");
   
           sc->wdc_channel.cmd_iot = ia->ia_iot;
           sc->wdc_channel.ctl_iot = ia->ia_iot;
           sc->sc_ic = ia->ia_ic;
           sc->sc_isa = parent;
   
           if (bus_space_map(sc->wdc_channel.cmd_iot, ia->ia_iobase,
               WDC_ISA_REG_NPORTS, 0, &sc->wdc_channel.cmd_ioh) ||
               bus_space_map(sc->wdc_channel.ctl_iot,
                 ia->ia_iobase + WDC_ISA_AUXREG_OFFSET, WDC_ISA_AUXREG_NPORTS,
                 0, &sc->wdc_channel.ctl_ioh)) {
                   printf("%s: couldn't map registers\n",
                       sc->sc_wdcdev.sc_dev.dv_xname);
           }
           sc->wdc_channel.data32iot = sc->wdc_channel.cmd_iot;
           sc->wdc_channel.data32ioh = sc->wdc_channel.cmd_ioh;
   
           sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
               IPL_BIO, wdcintr, &sc->wdc_channel, sc->sc_wdcdev.sc_dev.dv_xname);
   
           if (ia->ia_drq != DRQUNK) {
   #if NISADMA > 0
                   sc->sc_drq = ia->ia_drq;
   
                   sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA;
                   sc->sc_wdcdev.dma_arg = sc;
                   sc->sc_wdcdev.dma_init = wdc_isa_dma_init;
                   sc->sc_wdcdev.dma_start = wdc_isa_dma_start;
                   sc->sc_wdcdev.dma_finish = wdc_isa_dma_finish;
                   wdc_isa_dma_setup(sc);
   #else   /* NISADMA > 0 */
                   printf("%s: ignoring drq, isa dma not supported",
                       sc->sc_wdcdev.sc_dev.dv_xname);
   #endif  /* NISADMA > 0 */
           }
           sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_PREATA;
           if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_32)
                   sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA32;
           sc->sc_wdcdev.PIO_cap = 0;
           sc->wdc_chanptr = &sc->wdc_channel;
           sc->sc_wdcdev.channels = &sc->wdc_chanptr;
           sc->sc_wdcdev.nchannels = 1;
           sc->wdc_channel.channel = 0;
           sc->wdc_channel.wdc = &sc->sc_wdcdev;
           sc->wdc_channel.ch_queue = wdc_alloc_queue();
           if (sc->wdc_channel.ch_queue == NULL) {
                   printf("%s: cannot allocate channel queue",
                       sc->sc_wdcdev.sc_dev.dv_xname);
                   return;
           }
           wdcattach(&sc->wdc_channel);
           wdc_print_current_modes(&sc->wdc_channel);
   }
   
   #if NISADMA > 0
   static void
   wdc_isa_dma_setup(struct wdc_isa_softc *sc)
   {
           if (isa_dmamap_create(sc->sc_isa, sc->sc_drq,
               MAXPHYS, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {                              
                   printf("%s: can't create map for drq %d\n",
                       sc->sc_wdcdev.sc_dev.dv_xname, sc->sc_drq);
                   sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_DMA;
           }
   }
   
   static int
   wdc_isa_dma_init(void *v, int channel, int drive, void *databuf, size_t datalen,
       int read)
   {
           struct wdc_isa_softc *sc = v;
   
           isa_dmastart(sc->sc_isa, sc->sc_drq, databuf, datalen, NULL,
               (read ? DMAMODE_READ : DMAMODE_WRITE),
               BUS_DMA_NOWAIT);
   
           return 0;
   }
   
   static void
   wdc_isa_dma_start(void *v, int channel, int drive)
   {
           /* nothing to do */
   }
   
   static int
   wdc_isa_dma_finish(void *v, int channel, int drive, int force)
   {
           struct wdc_isa_softc *sc = v;
   
           isa_dmadone(sc->sc_isa, sc->sc_drq);
   
           return 0;
   }
   #endif  /* NISADMA > 0 */

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