FreeBSD/Linux Kernel Cross Reference
sys/dev/eisa/cac_eisa.c

     /*      $OpenBSD: cac_eisa.c,v 1.7 2022/04/06 18:59:28 naddy Exp $      */
     /*      $NetBSD: cac_eisa.c,v 1.1 2000/09/01 12:15:20 ad Exp $  */
     
     /*-
      * Copyright (c) 2000 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Andrew Doran.
     *
     * 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.
     */
    
    /*
     * Copyright (c) 2000 Jonathan Lemon
     * Copyright (c) 1999 by Matthew N. Dodd <winter@jurai.net>
     * 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,
     *    without modification, immediately at the beginning of the file.
     * 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 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 AUTHOR 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.
     */
    
    /*
     * EISA front-end for cac(4) driver.
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/device.h>
    
    #include <machine/bus.h>
    #include <machine/intr.h>
    
    #include <dev/eisa/eisavar.h>
    #include <dev/eisa/eisadevs.h>
    
    #include <scsi/scsi_all.h>
    #include <scsi/scsi_disk.h>
    #include <scsi/scsiconf.h>
    
    #include <dev/ic/cacreg.h>
    #include <dev/ic/cacvar.h>
    
    #define CAC_EISA_SLOT_OFFSET            0x0c88
    #define CAC_EISA_IOSIZE                 0x0017
    #define CAC_EISA_IOCONF                 0x38
    
    int     cac_eisa_match(struct device *, void *, void *);
    void    cac_eisa_attach(struct device *, struct device *, void *);
    
    struct  cac_ccb *cac_eisa_l0_completed(struct cac_softc *);
    int     cac_eisa_l0_fifo_full(struct cac_softc *);
    void    cac_eisa_l0_intr_enable(struct cac_softc *, int);
    int     cac_eisa_l0_intr_pending(struct cac_softc *);
    void    cac_eisa_l0_submit(struct cac_softc *, struct cac_ccb *);
    
    const struct cfattach cac_eisa_ca = {
            sizeof(struct cac_softc), cac_eisa_match, cac_eisa_attach
    };
    
    static const
    struct cac_linkage cac_eisa_l0 = {
           cac_eisa_l0_completed,
           cac_eisa_l0_fifo_full,
           cac_eisa_l0_intr_enable,
           cac_eisa_l0_intr_pending,
           cac_eisa_l0_submit
   };
   
   static const
   struct cac_eisa_type {
           const char      *ct_prodstr;
           const char      *ct_typestr;
           const struct    cac_linkage *ct_linkage;
   } cac_eisa_type[] = {
           { "CPQ4001",    "IDA",          &cac_eisa_l0 },
           { "CPQ4002",    "IDA-2",        &cac_eisa_l0 },
           { "CPQ4010",    "IEAS",         &cac_eisa_l0 },
           { "CPQ4020",    "SMART",        &cac_eisa_l0 },
           { "CPQ4030",    "SMART-2/E",    &cac_l0 },
   };
   
   int
   cac_eisa_match(struct device *parent, void *match, void *aux)
   {
           struct eisa_attach_args *ea;
           int i;
   
           ea = aux;
   
           for (i = 0; i < sizeof(cac_eisa_type) / sizeof(cac_eisa_type[0]); i++)
                   if (strcmp(ea->ea_idstring, cac_eisa_type[i].ct_prodstr) == 0)
                           return (1);
   
           return (0);
   }
   
   void
   cac_eisa_attach(struct device *parent, struct device *self, void *aux)
   {
           struct eisa_attach_args *ea;
           bus_space_handle_t ioh;
           eisa_chipset_tag_t ec;
           eisa_intr_handle_t ih;
           struct cac_softc *sc;
           bus_space_tag_t iot;
           const char *intrstr;
           int irq, i;
           
           ea = aux;
           sc = (struct cac_softc *)self;
           iot = ea->ea_iot;
           ec = ea->ea_ec;
           
           if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
               CAC_EISA_SLOT_OFFSET, CAC_EISA_IOSIZE, 0, &ioh)) {
                   printf(": can't map i/o space\n");
                   return;
           }
   
           /*
            * Print board type and attach to the bus-independent code.
            */
           for (i = 0; i < nitems(cac_eisa_type); i++)
                   if (strcmp(ea->ea_idstring, cac_eisa_type[i].ct_prodstr) == 0)
                           break;
   
           if (i == nitems(cac_eisa_type)) {
                   printf(": failed to attach %s\n", ea->ea_idstring);
                   return;
           }
   
           sc->sc_iot = iot;
           sc->sc_ioh = ioh;
           sc->sc_dmat = ea->ea_dmat;
   
           /* 
            * Map and establish the interrupt.
            */
           switch (bus_space_read_1(iot, ioh, CAC_EISA_IOCONF) & 0xf0) {
           case 0x20:
                   irq = 10;
                   break;
           case 0x10:
                   irq = 11;
                   break;
           case 0x40:
                   irq = 14;
                   break;
           case 0x80:
                   irq = 15;
                   break;
           default:
                   printf(": controller on invalid IRQ\n");
                   return;
           }
   
           if (eisa_intr_map(ec, irq, &ih)) {
                   printf(": can't map interrupt (%d)\n", irq);
                   return;
           }
           
           intrstr = eisa_intr_string(ec, ih);
           if ((sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
               cac_intr, sc, sc->sc_dv.dv_xname)) == NULL) {
                   printf(": can't establish interrupt");
                   if (intrstr != NULL)
                           printf(" at %s", intrstr);
                   printf("\n");
                   return;
           }
   
           printf(" %s: Compaq %s\n", intrstr, cac_eisa_type[i].ct_typestr);
           sc->sc_cl = cac_eisa_type[i].ct_linkage;
           cac_init(sc, 0);
   }
   
   /*
    * Linkage specific to EISA boards.
    */
   
   int
   cac_eisa_l0_fifo_full(struct cac_softc *sc)
   {
   
           return ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
               CAC_EISA_CHANNEL_CLEAR) == 0);
   }
   
   void
   cac_eisa_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
   {
           u_int16_t size;
   
           /*
            * On these boards, `ccb_hdr.size' is actually for control flags.
            * Set it to zero and pass the value by means of an I/O port.
            */
           size = letoh16(ccb->ccb_hdr.size) << 2;
           ccb->ccb_hdr.size = 0;
   
           bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, (caddr_t)ccb - sc->sc_ccbs,
               sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
   
           cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
           cac_outl(sc, CAC_EISAREG_LIST_ADDR, ccb->ccb_paddr);
           cac_outw(sc, CAC_EISAREG_LIST_LEN, size);
           cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_BUSY);
   }
   
   struct cac_ccb *
   cac_eisa_l0_completed(struct cac_softc *sc)
   {
           struct cac_ccb *ccb;
           u_int32_t off;
           u_int8_t status;
   
           if ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
               CAC_EISA_CHANNEL_BUSY) == 0)
                   return (NULL);
   
           cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_BUSY);
           off = cac_inl(sc, CAC_EISAREG_COMPLETE_ADDR);
           status = cac_inb(sc, CAC_EISAREG_LIST_STATUS);
           cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
   
           if (off == 0)
                   return (NULL);
   
           off = (off & ~3) - sc->sc_ccbs_paddr;
           ccb = (struct cac_ccb *)(sc->sc_ccbs + off);
   
           bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
               BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);
   
           ccb->ccb_req.error = status;
           return (ccb);
   }
   
   int
   cac_eisa_l0_intr_pending(struct cac_softc *sc)
   {
   
           return (cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
               CAC_EISA_CHANNEL_BUSY);
   }
   
   void
   cac_eisa_l0_intr_enable(struct cac_softc *sc, int state)
   {
   
           if (state) {
                   cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL,
                       ~CAC_EISA_CHANNEL_CLEAR);
                   cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL,
                       CAC_EISA_CHANNEL_BUSY);
                   cac_outb(sc, CAC_EISAREG_INTR_MASK, CAC_INTR_ENABLE);
                   cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_ENABLE);
           } else
                   cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_DISABLE);
   }

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