The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $OpenBSD: cac_eisa.c,v 1.3 2008/06/26 05:42:14 ray Exp $        */
    2 /*      $NetBSD: cac_eisa.c,v 1.1 2000/09/01 12:15:20 ad Exp $  */
    3 
    4 /*-
    5  * Copyright (c) 2000 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Andrew Doran.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   30  * POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * Copyright (c) 2000 Jonathan Lemon
   35  * Copyright (c) 1999 by Matthew N. Dodd <winter@jurai.net>
   36  * All Rights Reserved.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions, and the following disclaimer,
   43  *    without modification, immediately at the beginning of the file.
   44  * 2. The name of the author may not be used to endorse or promote products
   45  *    derived from this software without specific prior written permission.
   46  *
   47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   50  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   51  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   57  * SUCH DAMAGE.
   58  */
   59 
   60 /*
   61  * EISA front-end for cac(4) driver.
   62  */
   63 
   64 #include <sys/types.h>
   65 #include <sys/param.h>
   66 #include <sys/systm.h>
   67 #include <sys/device.h>
   68 
   69 #include <machine/bus.h>
   70 #include <machine/intr.h>
   71 
   72 #include <dev/eisa/eisavar.h>
   73 #include <dev/eisa/eisadevs.h>
   74 
   75 #include <scsi/scsi_all.h>
   76 #include <scsi/scsi_disk.h>
   77 #include <scsi/scsiconf.h>
   78 
   79 #include <dev/ic/cacreg.h>
   80 #include <dev/ic/cacvar.h>
   81 
   82 #define CAC_EISA_SLOT_OFFSET            0x0c88
   83 #define CAC_EISA_IOSIZE                 0x0017
   84 #define CAC_EISA_IOCONF                 0x38
   85 
   86 int     cac_eisa_match(struct device *, void *, void *);
   87 void    cac_eisa_attach(struct device *, struct device *, void *);
   88 
   89 struct  cac_ccb *cac_eisa_l0_completed(struct cac_softc *);
   90 int     cac_eisa_l0_fifo_full(struct cac_softc *);
   91 void    cac_eisa_l0_intr_enable(struct cac_softc *, int);
   92 int     cac_eisa_l0_intr_pending(struct cac_softc *);
   93 void    cac_eisa_l0_submit(struct cac_softc *, struct cac_ccb *);
   94 
   95 struct cfattach cac_eisa_ca = {
   96         sizeof(struct cac_softc), cac_eisa_match, cac_eisa_attach
   97 };
   98 
   99 static const
  100 struct cac_linkage cac_eisa_l0 = {
  101         cac_eisa_l0_completed,
  102         cac_eisa_l0_fifo_full,
  103         cac_eisa_l0_intr_enable,
  104         cac_eisa_l0_intr_pending,
  105         cac_eisa_l0_submit
  106 };
  107 
  108 static const
  109 struct cac_eisa_type {
  110         const char      *ct_prodstr;
  111         const char      *ct_typestr;
  112         const struct    cac_linkage *ct_linkage;
  113 } cac_eisa_type[] = {
  114         { "CPQ4001",    "IDA",          &cac_eisa_l0 },
  115         { "CPQ4002",    "IDA-2",        &cac_eisa_l0 },
  116         { "CPQ4010",    "IEAS",         &cac_eisa_l0 },
  117         { "CPQ4020",    "SMART",        &cac_eisa_l0 },
  118         { "CPQ4030",    "SMART-2/E",    &cac_l0 },
  119 };
  120 
  121 int
  122 cac_eisa_match(parent, match, aux)
  123         struct device *parent;
  124         void *match, *aux;
  125 {
  126         struct eisa_attach_args *ea;
  127         int i;
  128 
  129         ea = aux;
  130 
  131         for (i = 0; i < sizeof(cac_eisa_type) / sizeof(cac_eisa_type[0]); i++)
  132                 if (strcmp(ea->ea_idstring, cac_eisa_type[i].ct_prodstr) == 0)
  133                         return (1);
  134 
  135         return (0);
  136 }
  137 
  138 void
  139 cac_eisa_attach(parent, self, aux)
  140         struct device *parent;
  141         struct device *self;
  142         void *aux;
  143 {
  144         struct eisa_attach_args *ea;
  145         bus_space_handle_t ioh;
  146         eisa_chipset_tag_t ec;
  147         eisa_intr_handle_t ih;
  148         struct cac_softc *sc;
  149         bus_space_tag_t iot;
  150         const char *intrstr;
  151         int irq, i;
  152         
  153         ea = aux;
  154         sc = (struct cac_softc *)self;
  155         iot = ea->ea_iot;
  156         ec = ea->ea_ec;
  157         
  158         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
  159             CAC_EISA_SLOT_OFFSET, CAC_EISA_IOSIZE, 0, &ioh)) {
  160                 printf(": can't map i/o space\n");
  161                 return;
  162         }
  163 
  164         sc->sc_iot = iot;
  165         sc->sc_ioh = ioh;
  166         sc->sc_dmat = ea->ea_dmat;
  167 
  168         /* 
  169          * Map and establish the interrupt.
  170          */
  171         switch (bus_space_read_1(iot, ioh, CAC_EISA_IOCONF) & 0xf0) {
  172         case 0x20:
  173                 irq = 10;
  174                 break;
  175         case 0x10:
  176                 irq = 11;
  177                 break;
  178         case 0x40:
  179                 irq = 14;
  180                 break;
  181         case 0x80:
  182                 irq = 15;
  183                 break;
  184         default:
  185                 printf(": controller on invalid IRQ\n");
  186                 return;
  187         }
  188 
  189         if (eisa_intr_map(ec, irq, &ih)) {
  190                 printf(": can't map interrupt (%d)\n", irq);
  191                 return;
  192         }
  193         
  194         intrstr = eisa_intr_string(ec, ih);
  195         if ((sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
  196             cac_intr, sc, sc->sc_dv.dv_xname)) == NULL) {
  197                 printf(": can't establish interrupt");
  198                 if (intrstr != NULL)
  199                         printf(" at %s", intrstr);
  200                 printf("\n");
  201                 return;
  202         }
  203 
  204         /*
  205          * Print board type and attach to the bus-independent code.
  206          */
  207         for (i = 0; i < sizeof(cac_eisa_type) / sizeof(cac_eisa_type[0]); i++)
  208                 if (strcmp(ea->ea_idstring, cac_eisa_type[i].ct_prodstr) == 0)
  209                         break;
  210 
  211         printf(" %s: Compaq %s\n", intrstr, cac_eisa_type[i].ct_typestr);
  212         sc->sc_cl = cac_eisa_type[i].ct_linkage;
  213         cac_init(sc, 0);
  214 }
  215 
  216 /*
  217  * Linkage specific to EISA boards.
  218  */
  219 
  220 int
  221 cac_eisa_l0_fifo_full(struct cac_softc *sc)
  222 {
  223 
  224         return ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  225             CAC_EISA_CHANNEL_CLEAR) == 0);
  226 }
  227 
  228 void
  229 cac_eisa_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
  230 {
  231         u_int16_t size;
  232 
  233         /*
  234          * On these boards, `ccb_hdr.size' is actually for control flags.
  235          * Set it to zero and pass the value by means of an I/O port.
  236          */
  237         size = letoh16(ccb->ccb_hdr.size) << 2;
  238         ccb->ccb_hdr.size = 0;
  239 
  240         bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, (caddr_t)ccb - sc->sc_ccbs,
  241             sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
  242 
  243         cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
  244         cac_outl(sc, CAC_EISAREG_LIST_ADDR, ccb->ccb_paddr);
  245         cac_outw(sc, CAC_EISAREG_LIST_LEN, size);
  246         cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_BUSY);
  247 }
  248 
  249 struct cac_ccb *
  250 cac_eisa_l0_completed(struct cac_softc *sc)
  251 {
  252         struct cac_ccb *ccb;
  253         u_int32_t off;
  254         u_int8_t status;
  255 
  256         if ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  257             CAC_EISA_CHANNEL_BUSY) == 0)
  258                 return (NULL);
  259 
  260         cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_BUSY);
  261         off = cac_inl(sc, CAC_EISAREG_COMPLETE_ADDR);
  262         status = cac_inb(sc, CAC_EISAREG_LIST_STATUS);
  263         cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
  264 
  265         if (off == 0)
  266                 return (NULL);
  267 
  268         off = (off & ~3) - sc->sc_ccbs_paddr;
  269         ccb = (struct cac_ccb *)(sc->sc_ccbs + off);
  270 
  271         bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
  272             BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);
  273 
  274         ccb->ccb_req.error = status;
  275         return (ccb);
  276 }
  277 
  278 int
  279 cac_eisa_l0_intr_pending(struct cac_softc *sc)
  280 {
  281 
  282         return (cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  283             CAC_EISA_CHANNEL_BUSY);
  284 }
  285 
  286 void
  287 cac_eisa_l0_intr_enable(struct cac_softc *sc, int state)
  288 {
  289 
  290         if (state) {
  291                 cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL,
  292                     ~CAC_EISA_CHANNEL_CLEAR);
  293                 cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL,
  294                     CAC_EISA_CHANNEL_BUSY);
  295                 cac_outb(sc, CAC_EISAREG_INTR_MASK, CAC_INTR_ENABLE);
  296                 cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_ENABLE);
  297         } else
  298                 cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_DISABLE);
  299 }

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