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 /*      $NetBSD: cac_eisa.c,v 1.10 2005/02/27 00:26:59 perry Exp $      */
    2 
    3 /*-
    4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Andrew Doran.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *        This product includes software developed by the NetBSD
   21  *        Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 /*
   40  * Copyright (c) 2000 Jonathan Lemon
   41  * Copyright (c) 1999 by Matthew N. Dodd <winter@jurai.net>
   42  * All Rights Reserved.
   43  *
   44  * Redistribution and use in source and binary forms, with or without
   45  * modification, are permitted provided that the following conditions
   46  * are met:
   47  * 1. Redistributions of source code must retain the above copyright
   48  *    notice, this list of conditions, and the following disclaimer,
   49  *    without modification, immediately at the beginning of the file.
   50  * 2. The name of the author may not be used to endorse or promote products
   51  *    derived from this software without specific prior written permission.
   52  *
   53  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   56  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   57  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   63  * SUCH DAMAGE.
   64  */
   65 
   66 /*
   67  * EISA front-end for cac(4) driver.
   68  */
   69 
   70 #include <sys/cdefs.h>
   71 __KERNEL_RCSID(0, "$NetBSD: cac_eisa.c,v 1.10 2005/02/27 00:26:59 perry Exp $");
   72 
   73 #include <sys/param.h>
   74 #include <sys/systm.h>
   75 #include <sys/device.h>
   76 
   77 #include <machine/bus.h>
   78 #include <machine/intr.h>
   79 
   80 #include <dev/eisa/eisavar.h>
   81 #include <dev/eisa/eisadevs.h>
   82 
   83 #include <dev/ic/cacreg.h>
   84 #include <dev/ic/cacvar.h>
   85 
   86 #define CAC_EISA_SLOT_OFFSET            0x0c88
   87 #define CAC_EISA_IOSIZE                 0x0017
   88 #define CAC_EISA_IOCONF                 0x38
   89 
   90 static void     cac_eisa_attach(struct device *, struct device *, void *);
   91 static int      cac_eisa_match(struct device *, struct cfdata *, void *);
   92 
   93 static struct   cac_ccb *cac_eisa_l0_completed(struct cac_softc *);
   94 static int      cac_eisa_l0_fifo_full(struct cac_softc *);
   95 static void     cac_eisa_l0_intr_enable(struct cac_softc *, int);
   96 static int      cac_eisa_l0_intr_pending(struct cac_softc *);
   97 static void     cac_eisa_l0_submit(struct cac_softc *, struct cac_ccb *);
   98 
   99 CFATTACH_DECL(cac_eisa, sizeof(struct cac_softc),
  100     cac_eisa_match, cac_eisa_attach, NULL, NULL);
  101 
  102 static const struct cac_linkage cac_eisa_l0 = {
  103         cac_eisa_l0_completed,
  104         cac_eisa_l0_fifo_full,
  105         cac_eisa_l0_intr_enable,
  106         cac_eisa_l0_intr_pending,
  107         cac_eisa_l0_submit
  108 };
  109 
  110 struct cac_eisa_type {
  111         const char      *ct_prodstr;
  112         const char      *ct_typestr;
  113         const struct    cac_linkage *ct_linkage;
  114 } static cac_eisa_type[] = {
  115         { "CPQ4001",    "IDA",          &cac_eisa_l0 },
  116         { "CPQ4002",    "IDA-2",        &cac_eisa_l0 },
  117         { "CPQ4010",    "IEAS",         &cac_eisa_l0 },
  118         { "CPQ4020",    "SMART",        &cac_eisa_l0 },
  119         { "CPQ4030",    "SMART-2/E",    &cac_l0 },
  120 };
  121 
  122 static int
  123 cac_eisa_match(struct device *parent, struct cfdata *match, void *aux)
  124 {
  125         struct eisa_attach_args *ea;
  126         int i;
  127 
  128         ea = aux;
  129 
  130         for (i = 0; i < sizeof(cac_eisa_type) / sizeof(cac_eisa_type[0]); i++)
  131                 if (strcmp(ea->ea_idstring, cac_eisa_type[i].ct_prodstr) == 0)
  132                         return (1);
  133 
  134         return (0);
  135 }
  136 
  137 static void
  138 cac_eisa_attach(struct device *parent, struct device *self, void *aux)
  139 {
  140         struct eisa_attach_args *ea;
  141         bus_space_handle_t ioh;
  142         eisa_chipset_tag_t ec;
  143         eisa_intr_handle_t ih;
  144         struct cac_softc *sc;
  145         bus_space_tag_t iot;
  146         const char *intrstr;
  147         int irq, i;
  148 
  149         ea = aux;
  150         sc = (struct cac_softc *)self;
  151         iot = ea->ea_iot;
  152         ec = ea->ea_ec;
  153 
  154         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
  155             CAC_EISA_SLOT_OFFSET, CAC_EISA_IOSIZE, 0, &ioh)) {
  156                 printf("can't map i/o space\n");
  157                 return;
  158         }
  159 
  160         sc->sc_iot = iot;
  161         sc->sc_ioh = ioh;
  162         sc->sc_dmat = ea->ea_dmat;
  163 
  164         /*
  165          * Map and establish the interrupt.
  166          */
  167         switch (bus_space_read_1(iot, ioh, CAC_EISA_IOCONF) & 0xf0) {
  168         case 0x20:
  169                 irq = 10;
  170                 break;
  171         case 0x10:
  172                 irq = 11;
  173                 break;
  174         case 0x40:
  175                 irq = 14;
  176                 break;
  177         case 0x80:
  178                 irq = 15;
  179                 break;
  180         default:
  181                 printf("controller on invalid IRQ\n");
  182                 return;
  183         }
  184 
  185         if (eisa_intr_map(ec, irq, &ih)) {
  186                 printf("can't map interrupt (%d)\n", irq);
  187                 return;
  188         }
  189 
  190         intrstr = eisa_intr_string(ec, ih);
  191         if ((sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
  192             cac_intr, sc)) == NULL) {
  193                 printf("can't establish interrupt");
  194                 if (intrstr != NULL)
  195                         printf(" at %s", intrstr);
  196                 printf("\n");
  197                 return;
  198         }
  199 
  200         /*
  201          * Print board type and attach to the bus-independent code.
  202          */
  203         for (i = 0; i < sizeof(cac_eisa_type) / sizeof(cac_eisa_type[0]); i++)
  204                 if (strcmp(ea->ea_idstring, cac_eisa_type[i].ct_prodstr) == 0)
  205                         break;
  206 
  207         printf(": Compaq %s\n", cac_eisa_type[i].ct_typestr);
  208         memcpy(&sc->sc_cl, cac_eisa_type[i].ct_linkage, sizeof(sc->sc_cl));
  209         cac_init(sc, intrstr, 0);
  210 }
  211 
  212 /*
  213  * Linkage specific to EISA boards.
  214  */
  215 
  216 static int
  217 cac_eisa_l0_fifo_full(struct cac_softc *sc)
  218 {
  219 
  220         return ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  221             CAC_EISA_CHANNEL_CLEAR) == 0);
  222 }
  223 
  224 static void
  225 cac_eisa_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
  226 {
  227         u_int16_t size;
  228 
  229         /*
  230          * On these boards, `ccb_hdr.size' is actually for control flags.
  231          * Set it to zero and pass the value by means of an I/O port.
  232          */
  233         size = le16toh(ccb->ccb_hdr.size) << 2;
  234         ccb->ccb_hdr.size = 0;
  235 
  236         bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, (caddr_t)ccb - sc->sc_ccbs,
  237             sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
  238 
  239         cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
  240         cac_outl(sc, CAC_EISAREG_LIST_ADDR, ccb->ccb_paddr);
  241         cac_outw(sc, CAC_EISAREG_LIST_LEN, size);
  242         cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_BUSY);
  243 }
  244 
  245 static struct cac_ccb *
  246 cac_eisa_l0_completed(struct cac_softc *sc)
  247 {
  248         struct cac_ccb *ccb;
  249         u_int32_t off;
  250         u_int8_t status;
  251 
  252         if ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  253             CAC_EISA_CHANNEL_BUSY) == 0)
  254                 return (NULL);
  255 
  256         cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_BUSY);
  257         off = cac_inl(sc, CAC_EISAREG_COMPLETE_ADDR);
  258         status = cac_inb(sc, CAC_EISAREG_LIST_STATUS);
  259         cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
  260 
  261         if (off == 0)
  262                 return (NULL);
  263 
  264         off = (off & ~3) - sc->sc_ccbs_paddr;
  265         ccb = (struct cac_ccb *)(sc->sc_ccbs + off);
  266 
  267         bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
  268             BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);
  269 
  270         ccb->ccb_req.error = status;
  271         return (ccb);
  272 }
  273 
  274 static int
  275 cac_eisa_l0_intr_pending(struct cac_softc *sc)
  276 {
  277 
  278         return (cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  279             CAC_EISA_CHANNEL_BUSY);
  280 }
  281 
  282 static void
  283 cac_eisa_l0_intr_enable(struct cac_softc *sc, int state)
  284 {
  285 
  286         if (state) {
  287                 cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL,
  288                     ~CAC_EISA_CHANNEL_CLEAR);
  289                 cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL,
  290                     CAC_EISA_CHANNEL_BUSY);
  291                 cac_outb(sc, CAC_EISAREG_INTR_MASK, CAC_INTR_ENABLE);
  292                 cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_ENABLE);
  293         } else
  294                 cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_DISABLE);
  295 }

Cache object: b03257d1522964a8c4d8d89c4b1d0aa4


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