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 1.19 2008/04/28 20:23:48 martin 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  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 /*
   33  * Copyright (c) 2000 Jonathan Lemon
   34  * Copyright (c) 1999 by Matthew N. Dodd <winter@jurai.net>
   35  * All Rights Reserved.
   36  *
   37  * Redistribution and use in source and binary forms, with or without
   38  * modification, are permitted provided that the following conditions
   39  * are met:
   40  * 1. Redistributions of source code must retain the above copyright
   41  *    notice, this list of conditions, and the following disclaimer,
   42  *    without modification, immediately at the beginning of the file.
   43  * 2. The name of the author may not be used to endorse or promote products
   44  *    derived from this software without specific prior written permission.
   45  *
   46  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   49  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   50  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   56  * SUCH DAMAGE.
   57  */
   58 
   59 /*
   60  * EISA front-end for cac(4) driver.
   61  */
   62 
   63 #include <sys/cdefs.h>
   64 __KERNEL_RCSID(0, "$NetBSD: cac_eisa.c,v 1.19 2008/04/28 20:23:48 martin Exp $");
   65 
   66 #include <sys/param.h>
   67 #include <sys/systm.h>
   68 #include <sys/device.h>
   69 
   70 #include <sys/bus.h>
   71 #include <sys/intr.h>
   72 
   73 #include <dev/eisa/eisavar.h>
   74 #include <dev/eisa/eisadevs.h>
   75 
   76 #include <dev/ic/cacreg.h>
   77 #include <dev/ic/cacvar.h>
   78 
   79 #define CAC_EISA_SLOT_OFFSET            0x0c88
   80 #define CAC_EISA_IOSIZE                 0x0017
   81 #define CAC_EISA_IOCONF                 0x38
   82 
   83 static void     cac_eisa_attach(struct device *, struct device *, void *);
   84 static int      cac_eisa_match(struct device *, struct cfdata *, void *);
   85 
   86 static struct   cac_ccb *cac_eisa_l0_completed(struct cac_softc *);
   87 static int      cac_eisa_l0_fifo_full(struct cac_softc *);
   88 static void     cac_eisa_l0_intr_enable(struct cac_softc *, int);
   89 static int      cac_eisa_l0_intr_pending(struct cac_softc *);
   90 static void     cac_eisa_l0_submit(struct cac_softc *, struct cac_ccb *);
   91 
   92 CFATTACH_DECL(cac_eisa, sizeof(struct cac_softc),
   93     cac_eisa_match, cac_eisa_attach, NULL, NULL);
   94 
   95 static const struct cac_linkage cac_eisa_l0 = {
   96         cac_eisa_l0_completed,
   97         cac_eisa_l0_fifo_full,
   98         cac_eisa_l0_intr_enable,
   99         cac_eisa_l0_intr_pending,
  100         cac_eisa_l0_submit
  101 };
  102 
  103 static struct cac_eisa_type {
  104         const char      *ct_prodstr;
  105         const char      *ct_typestr;
  106         const struct    cac_linkage *ct_linkage;
  107 } cac_eisa_type[] = {
  108         { "CPQ4001",    "IDA",          &cac_eisa_l0 },
  109         { "CPQ4002",    "IDA-2",        &cac_eisa_l0 },
  110         { "CPQ4010",    "IEAS",         &cac_eisa_l0 },
  111         { "CPQ4020",    "SMART",        &cac_eisa_l0 },
  112         { "CPQ4030",    "SMART-2/E",    &cac_l0 },
  113 };
  114 
  115 static int
  116 cac_eisa_match(struct device *parent, struct cfdata *match,
  117     void *aux)
  118 {
  119         struct eisa_attach_args *ea;
  120         int i;
  121 
  122         ea = aux;
  123 
  124         for (i = 0; i < sizeof(cac_eisa_type) / sizeof(cac_eisa_type[0]); i++)
  125                 if (strcmp(ea->ea_idstring, cac_eisa_type[i].ct_prodstr) == 0)
  126                         return (1);
  127 
  128         return (0);
  129 }
  130 
  131 static void
  132 cac_eisa_attach(struct device *parent, struct device *self, void *aux)
  133 {
  134         struct eisa_attach_args *ea;
  135         bus_space_handle_t ioh;
  136         eisa_chipset_tag_t ec;
  137         eisa_intr_handle_t ih;
  138         struct cac_softc *sc;
  139         bus_space_tag_t iot;
  140         const char *intrstr;
  141         int irq, i;
  142 
  143         ea = aux;
  144         sc = device_private(self);
  145         iot = ea->ea_iot;
  146         ec = ea->ea_ec;
  147 
  148         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
  149             CAC_EISA_SLOT_OFFSET, CAC_EISA_IOSIZE, 0, &ioh)) {
  150                 printf("can't map i/o space\n");
  151                 return;
  152         }
  153 
  154         sc->sc_iot = iot;
  155         sc->sc_ioh = ioh;
  156         sc->sc_dmat = ea->ea_dmat;
  157 
  158         /*
  159          * Map and establish the interrupt.
  160          */
  161         switch (bus_space_read_1(iot, ioh, CAC_EISA_IOCONF) & 0xf0) {
  162         case 0x20:
  163                 irq = 10;
  164                 break;
  165         case 0x10:
  166                 irq = 11;
  167                 break;
  168         case 0x40:
  169                 irq = 14;
  170                 break;
  171         case 0x80:
  172                 irq = 15;
  173                 break;
  174         default:
  175                 printf("controller on invalid IRQ\n");
  176                 return;
  177         }
  178 
  179         if (eisa_intr_map(ec, irq, &ih)) {
  180                 printf("can't map interrupt (%d)\n", irq);
  181                 return;
  182         }
  183 
  184         intrstr = eisa_intr_string(ec, ih);
  185         if ((sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
  186             cac_intr, sc)) == NULL) {
  187                 printf("can't establish interrupt");
  188                 if (intrstr != NULL)
  189                         printf(" at %s", intrstr);
  190                 printf("\n");
  191                 return;
  192         }
  193 
  194         /*
  195          * Print board type and attach to the bus-independent code.
  196          */
  197         for (i = 0; i < sizeof(cac_eisa_type) / sizeof(cac_eisa_type[0]); i++)
  198                 if (strcmp(ea->ea_idstring, cac_eisa_type[i].ct_prodstr) == 0)
  199                         break;
  200 
  201         printf(": Compaq %s\n", cac_eisa_type[i].ct_typestr);
  202         memcpy(&sc->sc_cl, cac_eisa_type[i].ct_linkage, sizeof(sc->sc_cl));
  203         cac_init(sc, intrstr, 0);
  204 }
  205 
  206 /*
  207  * Linkage specific to EISA boards.
  208  */
  209 
  210 static int
  211 cac_eisa_l0_fifo_full(struct cac_softc *sc)
  212 {
  213 
  214         return ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  215             CAC_EISA_CHANNEL_CLEAR) == 0);
  216 }
  217 
  218 static void
  219 cac_eisa_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
  220 {
  221         u_int16_t size;
  222 
  223         /*
  224          * On these boards, `ccb_hdr.size' is actually for control flags.
  225          * Set it to zero and pass the value by means of an I/O port.
  226          */
  227         size = le16toh(ccb->ccb_hdr.size) << 2;
  228         ccb->ccb_hdr.size = 0;
  229 
  230         bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap,
  231             (char *)ccb - (char *)sc->sc_ccbs,
  232             sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
  233 
  234         cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
  235         cac_outl(sc, CAC_EISAREG_LIST_ADDR, ccb->ccb_paddr);
  236         cac_outw(sc, CAC_EISAREG_LIST_LEN, size);
  237         cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_BUSY);
  238 }
  239 
  240 static struct cac_ccb *
  241 cac_eisa_l0_completed(struct cac_softc *sc)
  242 {
  243         struct cac_ccb *ccb;
  244         u_int32_t off;
  245         u_int8_t status;
  246 
  247         if ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  248             CAC_EISA_CHANNEL_BUSY) == 0)
  249                 return (NULL);
  250 
  251         cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_BUSY);
  252         off = cac_inl(sc, CAC_EISAREG_COMPLETE_ADDR);
  253         status = cac_inb(sc, CAC_EISAREG_LIST_STATUS);
  254         cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
  255 
  256         if (off == 0)
  257                 return (NULL);
  258 
  259         off = (off & ~3) - sc->sc_ccbs_paddr;
  260         ccb = (struct cac_ccb *)((char *)sc->sc_ccbs + off);
  261 
  262         bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
  263             BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);
  264 
  265         ccb->ccb_req.error = status;
  266 
  267         if ((off & 3) != 0 && ccb->ccb_req.error == 0)
  268                 ccb->ccb_req.error = CAC_RET_CMD_REJECTED;
  269 
  270         return (ccb);
  271 }
  272 
  273 static int
  274 cac_eisa_l0_intr_pending(struct cac_softc *sc)
  275 {
  276 
  277         return (cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
  278             CAC_EISA_CHANNEL_BUSY);
  279 }
  280 
  281 static void
  282 cac_eisa_l0_intr_enable(struct cac_softc *sc, int state)
  283 {
  284 
  285         if (state) {
  286                 cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL,
  287                     ~CAC_EISA_CHANNEL_CLEAR);
  288                 cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL,
  289                     CAC_EISA_CHANNEL_BUSY);
  290                 cac_outb(sc, CAC_EISAREG_INTR_MASK, CAC_INTR_ENABLE);
  291                 cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_ENABLE);
  292         } else
  293                 cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_DISABLE);
  294 }

Cache object: 115e2de8b77759cffcc5cc34cf283a75


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