uha_eisa.c

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    1 /*      $OpenBSD: uha_eisa.c,v 1.16 2022/04/06 18:59:28 naddy Exp $     */
    2 /*      $NetBSD: uha_eisa.c,v 1.5 1996/10/21 22:31:07 thorpej Exp $     */
    3 
    4 /*
    5  * Copyright (c) 1994, 1996 Charles M. Hannum.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Charles M. Hannum.
   18  * 4. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/device.h>
   36 #include <sys/kernel.h>
   37 #include <uvm/uvm_extern.h>
   38 
   39 #include <machine/bus.h>
   40 #include <machine/intr.h>
   41 
   42 #include <scsi/scsi_all.h>
   43 #include <scsi/scsiconf.h>
   44 
   45 #include <dev/eisa/eisavar.h>
   46 #include <dev/eisa/eisadevs.h>
   47 
   48 #include <dev/ic/uhareg.h>
   49 #include <dev/ic/uhavar.h>
   50 
   51 #define UHA_EISA_SLOT_OFFSET    0xc80
   52 #define UHA_EISA_IOSIZE         0x020
   53 
   54 int     uha_eisa_match(struct device *, void *, void *);
   55 void    uha_eisa_attach(struct device *, struct device *, void *);
   56 
   57 const struct cfattach uha_eisa_ca = {
   58         sizeof(struct uha_softc), uha_eisa_match, uha_eisa_attach
   59 };
   60 
   61 #define KVTOPHYS(x)     vtophys((vaddr_t)(x))
   62 
   63 int u24_find(bus_space_tag_t, bus_space_handle_t, struct uha_softc *);
   64 void u24_start_mbox(struct uha_softc *, struct uha_mscp *);
   65 int u24_poll(struct uha_softc *, struct scsi_xfer *, int);
   66 int u24_intr(void *);
   67 void u24_init(struct uha_softc *);
   68 
   69 /*
   70  * Check the slots looking for a board we recognise
   71  * If we find one, note its address (slot) and call
   72  * the actual probe routine to check it out.
   73  */
   74 int
   75 uha_eisa_match(struct device *parent, void *match, void *aux)
   76 {
   77         struct eisa_attach_args *ea = aux;
   78         bus_space_tag_t iot = ea->ea_iot;
   79         bus_space_handle_t ioh;
   80         int rv;
   81 
   82         /* must match one of our known ID strings */
   83         if (strncmp(ea->ea_idstring, "USC024", 6))
   84                 return (0);
   85 
   86         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
   87             UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
   88                 return (0);
   89 
   90         rv = u24_find(iot, ioh, NULL);
   91 
   92         bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE);
   93 
   94         return (rv);
   95 }
   96 
   97 /*
   98  * Attach all the sub-devices we can find
   99  */
  100 void
  101 uha_eisa_attach(struct device *parent, struct device *self, void *aux)
  102 {
  103         struct eisa_attach_args *ea = aux;
  104         struct uha_softc *sc = (void *)self;
  105         bus_space_tag_t iot = ea->ea_iot;
  106         bus_space_handle_t ioh;
  107         eisa_chipset_tag_t ec = ea->ea_ec;
  108         eisa_intr_handle_t ih;
  109         const char *model, *intrstr;
  110 
  111         if (!strncmp(ea->ea_idstring, "USC024", 6))
  112                 model = EISA_PRODUCT_USC0240;
  113         else
  114                 model = "unknown model!";
  115         printf(": %s\n", model);
  116 
  117         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
  118             UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
  119                 panic("uha_attach: can't map I/O addresses");
  120 
  121         sc->sc_iot = iot;
  122         sc->sc_ioh = ioh;
  123         if (!u24_find(iot, ioh, sc))
  124                 panic("uha_attach: u24_find failed!");
  125 
  126         if (eisa_intr_map(ec, sc->sc_irq, &ih)) {
  127                 printf("%s: couldn't map interrupt (%d)\n",
  128                     sc->sc_dev.dv_xname, sc->sc_irq);
  129                 return;
  130         }
  131         intrstr = eisa_intr_string(ec, ih);
  132         sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
  133             u24_intr, sc, sc->sc_dev.dv_xname);
  134         if (sc->sc_ih == NULL) {
  135                 printf("%s: couldn't establish interrupt",
  136                     sc->sc_dev.dv_xname);
  137                 if (intrstr != NULL)
  138                         printf(" at %s", intrstr);
  139                 printf("\n");
  140                 return;
  141         }
  142         printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
  143 
  144         /* Save function pointers for later use. */
  145         sc->start_mbox = u24_start_mbox;
  146         sc->poll = u24_poll;
  147         sc->init = u24_init;
  148 
  149         uha_attach(sc);
  150 }
  151 
  152 int
  153 u24_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_softc *sc)
  154 {
  155         u_int8_t config0, config1, config2;
  156         int irq, drq;
  157         int resetcount = 4000;  /* 4 secs? */
  158 
  159         config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0);
  160         config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1);
  161         config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2);
  162         if ((config0 & U24_MAGIC1) == 0 ||
  163             (config1 & U24_MAGIC2) == 0)
  164                 return (0);
  165 
  166         drq = -1;
  167 
  168         switch (config0 & U24_IRQ_MASK) {
  169         case U24_IRQ10:
  170                 irq = 10;
  171                 break;
  172         case U24_IRQ11:
  173                 irq = 11;
  174                 break;
  175         case U24_IRQ14:
  176                 irq = 14;
  177                 break;
  178         case U24_IRQ15:
  179                 irq = 15;
  180                 break;
  181         default:
  182                 printf("u24_find: illegal irq setting %x\n",
  183                     config0 & U24_IRQ_MASK);
  184                 return (0);
  185         }
  186 
  187         bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST);
  188 
  189         while (--resetcount) {
  190                 if (bus_space_read_1(iot, ioh, U24_LINT))
  191                         break;
  192                 delay(1000);    /* 1 mSec per loop */
  193         }
  194         if (!resetcount) {
  195                 printf("u24_find: board timed out during reset\n");
  196                 return (0);
  197         }
  198 
  199         /* if we want to fill in softc, do so now */
  200         if (sc != NULL) {
  201                 sc->sc_irq = irq;
  202                 sc->sc_drq = drq;
  203                 sc->sc_scsi_dev = config2 & U24_HOSTID_MASK;
  204         }
  205 
  206         return (1);
  207 }
  208 
  209 void
  210 u24_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp)
  211 {
  212         bus_space_tag_t iot = sc->sc_iot;
  213         bus_space_handle_t ioh = sc->sc_ioh;
  214         int spincount = 100000; /* 1s should be enough */
  215 
  216         while (--spincount) {
  217                 if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0)
  218                         break;
  219                 delay(100);
  220         }
  221         if (!spincount)
  222                 panic("%s: uha_start_mbox, board not responding",
  223                     sc->sc_dev.dv_xname);
  224 
  225         bus_space_write_4(iot, ioh, U24_OGMPTR, KVTOPHYS(mscp));
  226         if (mscp->flags & MSCP_ABORT)
  227                 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80);
  228         else
  229                 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01);
  230         bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL);
  231 
  232         if ((mscp->xs->flags & SCSI_POLL) == 0)
  233                 timeout_add_msec(&mscp->xs->stimeout, mscp->timeout);
  234 }
  235 
  236 int
  237 u24_poll(struct uha_softc *sc, struct scsi_xfer *xs, int count)
  238 {
  239         bus_space_tag_t iot = sc->sc_iot;
  240         bus_space_handle_t ioh = sc->sc_ioh;
  241         int s;
  242 
  243         while (count) {
  244                 /*
  245                  * If we had interrupts enabled, would we
  246                  * have got an interrupt?
  247                  */
  248                 if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) {
  249                         s = splbio();
  250                         u24_intr(sc);
  251                         splx(s);
  252                 }
  253                 if (xs->flags & ITSDONE)
  254                         return (0);
  255                 delay(1000);
  256                 count--;
  257         }
  258         return (1);
  259 }
  260 
  261 int
  262 u24_intr(void *arg)
  263 {
  264         struct uha_softc *sc = arg;
  265         bus_space_tag_t iot = sc->sc_iot;
  266         bus_space_handle_t ioh = sc->sc_ioh;
  267         struct uha_mscp *mscp;
  268         u_char uhastat;
  269         u_long mboxval;
  270 
  271 #ifdef  UHADEBUG
  272         printf("%s: uhaintr ", sc->sc_dev.dv_xname);
  273 #endif /*UHADEBUG */
  274 
  275         if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  276                 return (0);
  277 
  278         for (;;) {
  279                 /*
  280                  * First get all the information and then
  281                  * acknowledge the interrupt
  282                  */
  283                 uhastat = bus_space_read_1(iot, ioh, U24_SINT);
  284                 mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR);
  285                 bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK);
  286                 bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  287 
  288 #ifdef  UHADEBUG
  289                 printf("status = 0x%x ", uhastat);
  290 #endif /*UHADEBUG*/
  291 
  292                 /*
  293                  * Process the completed operation
  294                  */
  295                 mscp = uha_mscp_phys_kv(sc, mboxval);
  296                 if (!mscp) {
  297                         printf("%s: BAD MSCP RETURNED!\n",
  298                             sc->sc_dev.dv_xname);
  299                         continue;       /* whatever it was, it'll timeout */
  300                 }
  301                 timeout_del(&mscp->xs->stimeout);
  302                 uha_done(sc, mscp);
  303 
  304                 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  305                         return (1);
  306         }
  307 }
  308 
  309 void
  310 u24_init(struct uha_softc *sc)
  311 {
  312         bus_space_tag_t iot = sc->sc_iot;
  313         bus_space_handle_t ioh = sc->sc_ioh;
  314 
  315         /* free OGM and ICM */
  316         bus_space_write_1(iot, ioh, U24_OGMCMD, 0);
  317         bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  318         /* make sure interrupts are enabled */
  319 #ifdef UHADEBUG
  320         printf("u24_init: lmask=%02x, smask=%02x\n",
  321             bus_space_read_1(iot, ioh, U24_LMASK),
  322             bus_space_read_1(iot, ioh, U24_SMASK));
  323 #endif
  324         bus_space_write_1(iot, ioh, U24_LMASK, 0xd2);   /* XXX */
  325         bus_space_write_1(iot, ioh, U24_SMASK, 0x92);   /* XXX */
  326 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/eisa/uha_eisa.c

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sys/dev/eisa/uha_eisa.c
