The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/eisa/uha_eisa.c

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    1 /*      $NetBSD: uha_eisa.c,v 1.39 2021/01/27 04:35:15 thorpej Exp $    */
    2 
    3 /*-
    4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Charles M. Hannum.
    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 #include <sys/cdefs.h>
   33 __KERNEL_RCSID(0, "$NetBSD: uha_eisa.c,v 1.39 2021/01/27 04:35:15 thorpej Exp $");
   34 
   35 #include "opt_ddb.h"
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/device.h>
   40 #include <sys/kernel.h>
   41 #include <sys/proc.h>
   42 
   43 #include <sys/bus.h>
   44 #include <sys/intr.h>
   45 
   46 #include <dev/scsipi/scsi_all.h>
   47 #include <dev/scsipi/scsipi_all.h>
   48 #include <dev/scsipi/scsiconf.h>
   49 
   50 #include <dev/eisa/eisavar.h>
   51 #include <dev/eisa/eisadevs.h>
   52 
   53 #include <dev/ic/uhareg.h>
   54 #include <dev/ic/uhavar.h>
   55 
   56 #define UHA_EISA_SLOT_OFFSET    0xc80
   57 #define UHA_EISA_IOSIZE         0x020
   58 
   59 static int      uha_eisa_match(device_t, cfdata_t, void *);
   60 static void     uha_eisa_attach(device_t, device_t, void *);
   61 
   62 CFATTACH_DECL_NEW(uha_eisa, sizeof(struct uha_softc),
   63     uha_eisa_match, uha_eisa_attach, NULL, NULL);
   64 
   65 #ifndef DDB
   66 #define Debugger() panic("should call debugger here (uha_eisa.c)")
   67 #endif /* ! DDB */
   68 
   69 static int      u24_find(bus_space_tag_t, bus_space_handle_t,
   70                     struct uha_probe_data *);
   71 static void     u24_start_mbox(struct uha_softc *, struct uha_mscp *);
   72 static int      u24_poll(struct uha_softc *, struct scsipi_xfer *, int);
   73 static int      u24_intr(void *);
   74 static void     u24_init(struct uha_softc *);
   75 
   76 static const struct device_compatible_entry compat_data[] = {
   77         { .compat = "USC024?",  .data = EISA_PRODUCT_USC0240 },
   78         DEVICE_COMPAT_EOL
   79 };
   80 
   81 /*
   82  * Check the slots looking for a board we recognise
   83  * If we find one, note its address (slot) and call
   84  * the actual probe routine to check it out.
   85  */
   86 static int
   87 uha_eisa_match(device_t parent, cfdata_t match,
   88     void *aux)
   89 {
   90         struct eisa_attach_args *ea = aux;
   91         bus_space_tag_t iot = ea->ea_iot;
   92         bus_space_handle_t ioh;
   93         int rv;
   94 
   95         if (!eisa_compatible_match(ea, compat_data))
   96                 return (0);
   97 
   98         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
   99             UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
  100                 return (0);
  101 
  102         rv = u24_find(iot, ioh, NULL);
  103 
  104         bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE);
  105 
  106         return (rv);
  107 }
  108 
  109 /*
  110  * Attach all the sub-devices we can find
  111  */
  112 static void
  113 uha_eisa_attach(device_t parent, device_t self, void *aux)
  114 {
  115         struct eisa_attach_args *ea = aux;
  116         struct uha_softc *sc = device_private(self);
  117         const struct device_compatible_entry *dce;
  118         bus_space_tag_t iot = ea->ea_iot;
  119         bus_dma_tag_t dmat = ea->ea_dmat;
  120         bus_space_handle_t ioh;
  121         struct uha_probe_data upd;
  122         eisa_chipset_tag_t ec = ea->ea_ec;
  123         eisa_intr_handle_t ih;
  124         const char *intrstr;
  125         char intrbuf[EISA_INTRSTR_LEN];
  126 
  127         dce = eisa_compatible_lookup(ea, compat_data);
  128         KASSERT(dce != NULL);
  129 
  130         printf(": %s\n", (const char *)dce->data);
  131 
  132         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
  133             UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
  134                 panic("uha_eisa_attach: could not map I/O addresses");
  135 
  136         sc->sc_dev = self;
  137         sc->sc_iot = iot;
  138         sc->sc_ioh = ioh;
  139         sc->sc_dmat = dmat;
  140         if (!u24_find(iot, ioh, &upd))
  141                 panic("uha_eisa_attach: u24_find failed!");
  142 
  143         sc->sc_dmaflags = 0;
  144 
  145         if (eisa_intr_map(ec, upd.sc_irq, &ih)) {
  146                 aprint_error_dev(sc->sc_dev, "couldn't map interrupt (%d)\n",
  147                     upd.sc_irq);
  148                 return;
  149         }
  150         intrstr = eisa_intr_string(ec, ih, intrbuf, sizeof(intrbuf));
  151         sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
  152             u24_intr, sc);
  153         if (sc->sc_ih == NULL) {
  154                 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt");
  155                 if (intrstr != NULL)
  156                         aprint_error(" at %s", intrstr);
  157                 aprint_error("\n");
  158                 return;
  159         }
  160         aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr);
  161 
  162         /* Save function pointers for later use. */
  163         sc->start_mbox = u24_start_mbox;
  164         sc->poll = u24_poll;
  165         sc->init = u24_init;
  166 
  167         uha_attach(sc, &upd);
  168 }
  169 
  170 static int
  171 u24_find(bus_space_tag_t iot, bus_space_handle_t ioh,
  172     struct uha_probe_data *sc)
  173 {
  174         u_int8_t config0, config1, config2;
  175         int irq, drq;
  176         int resetcount = 4000;  /* 4 secs? */
  177 
  178         config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0);
  179         config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1);
  180         config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2);
  181         if ((config0 & U24_MAGIC1) == 0 ||
  182             (config1 & U24_MAGIC2) == 0)
  183                 return (0);
  184 
  185         drq = -1;
  186 
  187         switch (config0 & U24_IRQ_MASK) {
  188         case U24_IRQ10:
  189                 irq = 10;
  190                 break;
  191         case U24_IRQ11:
  192                 irq = 11;
  193                 break;
  194         case U24_IRQ14:
  195                 irq = 14;
  196                 break;
  197         case U24_IRQ15:
  198                 irq = 15;
  199                 break;
  200         default:
  201                 printf("u24_find: illegal irq setting %x\n",
  202                     config0 & U24_IRQ_MASK);
  203                 return (0);
  204         }
  205 
  206         bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST);
  207 
  208         while (--resetcount) {
  209                 if (bus_space_read_1(iot, ioh, U24_LINT))
  210                         break;
  211                 delay(1000);    /* 1 mSec per loop */
  212         }
  213         if (!resetcount) {
  214                 printf("u24_find: board timed out during reset\n");
  215                 return (0);
  216         }
  217 
  218         /* if we want to fill in softc, do so now */
  219         if (sc) {
  220                 sc->sc_irq = irq;
  221                 sc->sc_drq = drq;
  222                 sc->sc_scsi_dev = config2 & U24_HOSTID_MASK;
  223         }
  224 
  225         return (1);
  226 }
  227 
  228 static void
  229 u24_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp)
  230 {
  231         bus_space_tag_t iot = sc->sc_iot;
  232         bus_space_handle_t ioh = sc->sc_ioh;
  233         int spincount = 100000; /* 1s should be enough */
  234 
  235         while (--spincount) {
  236                 if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0)
  237                         break;
  238                 delay(100);
  239         }
  240         if (!spincount) {
  241                 aprint_error_dev(sc->sc_dev,
  242                     "uha_start_mbox, board not responding\n");
  243                 Debugger();
  244         }
  245 
  246         bus_space_write_4(iot, ioh, U24_OGMPTR,
  247             sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp));
  248         if (mscp->flags & MSCP_ABORT)
  249                 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80);
  250         else
  251                 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01);
  252         bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL);
  253 
  254         if ((mscp->xs->xs_control & XS_CTL_POLL) == 0)
  255                 callout_reset(&mscp->xs->xs_callout,
  256                     mstohz(mscp->timeout), uha_timeout, mscp);
  257 }
  258 
  259 static int
  260 u24_poll(struct uha_softc *sc, struct scsipi_xfer *xs, int count)
  261 {
  262         bus_space_tag_t iot = sc->sc_iot;
  263         bus_space_handle_t ioh = sc->sc_ioh;
  264 
  265         while (count) {
  266                 /*
  267                  * If we had interrupts enabled, would we
  268                  * have got an interrupt?
  269                  */
  270                 if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP)
  271                         u24_intr(sc);
  272                 if (xs->xs_status & XS_STS_DONE)
  273                         return (0);
  274                 delay(1000);
  275                 count--;
  276         }
  277         return (1);
  278 }
  279 
  280 static int
  281 u24_intr(void *arg)
  282 {
  283         struct uha_softc *sc = arg;
  284         bus_space_tag_t iot = sc->sc_iot;
  285         bus_space_handle_t ioh = sc->sc_ioh;
  286         struct uha_mscp *mscp;
  287         u_char uhastat;
  288         u_long mboxval;
  289 
  290 #ifdef  UHADEBUG
  291         printf("%s: uhaintr ", device_xname(sc->sc_dev));
  292 #endif /*UHADEBUG */
  293 
  294         if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  295                 return (0);
  296 
  297         for (;;) {
  298                 /*
  299                  * First get all the information and then
  300                  * acknowledge the interrupt
  301                  */
  302                 uhastat = bus_space_read_1(iot, ioh, U24_SINT);
  303                 mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR);
  304                 bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK);
  305                 bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  306 
  307 #ifdef  UHADEBUG
  308                 printf("status = 0x%x ", uhastat);
  309 #else
  310                 __USE(uhastat);
  311 #endif /*UHADEBUG*/
  312 
  313                 /*
  314                  * Process the completed operation
  315                  */
  316                 mscp = uha_mscp_phys_kv(sc, mboxval);
  317                 if (!mscp) {
  318                         printf("%s: BAD MSCP RETURNED!\n",
  319                             device_xname(sc->sc_dev));
  320                         continue;       /* whatever it was, it'll timeout */
  321                 }
  322                 callout_stop(&mscp->xs->xs_callout);
  323                 uha_done(sc, mscp);
  324 
  325                 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  326                         return (1);
  327         }
  328 }
  329 
  330 static void
  331 u24_init(struct uha_softc *sc)
  332 {
  333         bus_space_tag_t iot = sc->sc_iot;
  334         bus_space_handle_t ioh = sc->sc_ioh;
  335 
  336         /* free OGM and ICM */
  337         bus_space_write_1(iot, ioh, U24_OGMCMD, 0);
  338         bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  339         /* make sure interrupts are enabled */
  340 #ifdef UHADEBUG
  341         printf("u24_init: lmask=%02x, smask=%02x\n",
  342             bus_space_read_1(iot, ioh, U24_LMASK),
  343             bus_space_read_1(iot, ioh, U24_SMASK));
  344 #endif
  345         bus_space_write_1(iot, ioh, U24_LMASK, 0xd2);   /* XXX */
  346         bus_space_write_1(iot, ioh, U24_SMASK, 0x92);   /* XXX */
  347 }

Cache object: 0cf77684035fe28b8da9f3ba3fd911ce


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