root/dev/eisa/uha_eisa.c

DEFINITIONS

1. uha_eisa_match
2. uha_eisa_attach
3. u24_find
4. u24_start_mbox
5. u24_poll
6. u24_intr
7. u24_init

    1 /*      $OpenBSD: uha_eisa.c,v 1.6 2007/04/10 17:47:55 miod Exp $       */
    2 /*      $NetBSD: uha_eisa.c,v 1.5 1996/10/21 22:31:07 thorpej Exp $     */
    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  */
   33 #include <sys/types.h>
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/device.h>
   37 #include <sys/kernel.h>
   38 #include <sys/proc.h>
   39 #include <sys/user.h>
   41 #include <machine/bus.h>
   42 #include <machine/intr.h>
   44 #include <scsi/scsi_all.h>
   45 #include <scsi/scsiconf.h>
   47 #include <dev/eisa/eisavar.h>
   48 #include <dev/eisa/eisadevs.h>
   50 #include <dev/ic/uhareg.h>
   51 #include <dev/ic/uhavar.h>
   53 #define UHA_EISA_SLOT_OFFSET    0xc80
   54 #define UHA_EISA_IOSIZE         0x020
   56 #ifndef DDB
   57 #define Debugger() panic("should call debugger here (uha_eisa.c)")
   58 #endif
   60 int     uha_eisa_match(struct device *, void *, void *);
   61 void    uha_eisa_attach(struct device *, struct device *, void *);
   63 struct cfattach uha_eisa_ca = {
   64         sizeof(struct uha_softc), uha_eisa_match, uha_eisa_attach
   65 };
   67 #define KVTOPHYS(x)     vtophys((vaddr_t)(x))
   69 int u24_find(bus_space_tag_t, bus_space_handle_t, struct uha_softc *);
   70 void u24_start_mbox(struct uha_softc *, struct uha_mscp *);
   71 int u24_poll(struct uha_softc *, struct scsi_xfer *, int);
   72 int u24_intr(void *);
   73 void u24_init(struct uha_softc *);
   75 /*
   76  * Check the slots looking for a board we recognise
   77  * If we find one, note its address (slot) and call
   78  * the actual probe routine to check it out.
   79  */
   80 int
uha_eisa_match(parent, match, aux)
   82         struct device *parent;
   83         void *match, *aux;
   84 {
   85         struct eisa_attach_args *ea = aux;
bus_space_tag_t iot = ea->ea_iot;
bus_space_handle_t ioh;
   88         int rv;
   90         /* must match one of our known ID strings */
   91         if (strncmp(ea->ea_idstring, "USC024", 6))
   92                 return (0);
   94         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
   96                 return (0);
rv = u24_find(iot, ioh, NULL);
bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE);
  102         return (rv);
  103 }
  105 /*
  106  * Attach all the sub-devices we can find
  107  */
  108 void
uha_eisa_attach(parent, self, aux)
  110         struct device *parent, *self;
  111         void *aux;
  112 {
  113         struct eisa_attach_args *ea = aux;
  114         struct uha_softc *sc = (void *)self;
bus_space_tag_t iot = ea->ea_iot;
bus_space_handle_t ioh;
eisa_chipset_tag_t ec = ea->ea_ec;
eisa_intr_handle_t ih;
  119         const char *model, *intrstr;
  121         if (!strncmp(ea->ea_idstring, "USC024", 6))
model = EISA_PRODUCT_USC0240;
  123         else
model = "unknown model!";
printf(": %s\n", model);
  127         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
panic("uha_attach: could not map I/O addresses");
sc->sc_iot = iot;
sc->sc_ioh = ioh;
  133         if (!u24_find(iot, ioh, sc))
panic("uha_attach: u24_find failed!");
  136         if (eisa_intr_map(ec, sc->sc_irq, &ih)) {
printf("%s: couldn't map interrupt (%d)\n",
sc->sc_dev.dv_xname, sc->sc_irq);
  139                 return;
  140         }
intrstr = eisa_intr_string(ec, ih);
sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
u24_intr, sc, sc->sc_dev.dv_xname);
  144         if (sc->sc_ih == NULL) {
printf("%s: couldn't establish interrupt",
sc->sc_dev.dv_xname);
  147                 if (intrstr != NULL)
printf(" at %s", intrstr);
printf("\n");
  150                 return;
  151         }
printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
  154         /* Save function pointers for later use. */
sc->start_mbox = u24_start_mbox;
sc->poll = u24_poll;
sc->init = u24_init;
uha_attach(sc);
  160 }
  162 int
u24_find(iot, ioh, sc)
bus_space_tag_t iot;
bus_space_handle_t ioh;
  166         struct uha_softc *sc;
  167 {
u_int8_t config0, config1, config2;
  169         int irq, drq;
  170         int resetcount = 4000;  /* 4 secs? */
config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0);
config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1);
config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2);
  175         if ((config0 & U24_MAGIC1) == 0 ||
  176             (config1 & U24_MAGIC2) == 0)
  177                 return (0);
drq = -1;
  181         switch (config0 & U24_IRQ_MASK) {
  182         case U24_IRQ10:
irq = 10;
  184                 break;
  185         case U24_IRQ11:
irq = 11;
  187                 break;
  188         case U24_IRQ14:
irq = 14;
  190                 break;
  191         case U24_IRQ15:
irq = 15;
  193                 break;
  194         default:
printf("u24_find: illegal irq setting %x\n",
config0 & U24_IRQ_MASK);
  197                 return (0);
  198         }
bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST);
  202         while (--resetcount) {
  203                 if (bus_space_read_1(iot, ioh, U24_LINT))
  204                         break;
delay(1000);    /* 1 mSec per loop */
  206         }
  207         if (!resetcount) {
printf("u24_find: board timed out during reset\n");
  209                 return (0);
  210         }
  212         /* if we want to fill in softc, do so now */
  213         if (sc != NULL) {
sc->sc_irq = irq;
sc->sc_drq = drq;
sc->sc_scsi_dev = config2 & U24_HOSTID_MASK;
  217         }
  219         return (1);
  220 }
  222 void
u24_start_mbox(sc, mscp)
  224         struct uha_softc *sc;
  225         struct uha_mscp *mscp;
  226 {
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
  229         int spincount = 100000; /* 1s should be enough */
  231         while (--spincount) {
  232                 if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0)
  233                         break;
delay(100);
  235         }
  236         if (!spincount) {
printf("%s: uha_start_mbox, board not responding\n",
sc->sc_dev.dv_xname);
Debugger();
  240         }
bus_space_write_4(iot, ioh, U24_OGMPTR, KVTOPHYS(mscp));
  243         if (mscp->flags & MSCP_ABORT)
bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80);
  245         else
bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01);
bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL);
  249         if ((mscp->xs->flags & SCSI_POLL) == 0)
timeout_add(&mscp->xs->stimeout, (mscp->timeout * hz) / 1000);
  251 }
  253 int
u24_poll(sc, xs, count)
  255         struct uha_softc *sc;
  256         struct scsi_xfer *xs;
  257         int count;
  258 {
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
  262         while (count) {
  263                 /*
  264                  * If we had interrupts enabled, would we
  265                  * have got an interrupt?
  266                  */
  267                 if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP)
u24_intr(sc);
  269                 if (xs->flags & ITSDONE)
  270                         return (0);
delay(1000);
count--;
  273         }
  274         return (1);
  275 }
  277 int
u24_intr(arg)
  279         void *arg;
  280 {
  281         struct uha_softc *sc = arg;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
  284         struct uha_mscp *mscp;
u_char uhastat;
u_long mboxval;
  288 #ifdef  UHADEBUG
printf("%s: uhaintr ", sc->sc_dev.dv_xname);
  290 #endif /*UHADEBUG */
  292         if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  293                 return (0);
  295         for (;;) {
  296                 /*
  297                  * First get all the information and then
  298                  * acknowledge the interrupt
  299                  */
uhastat = bus_space_read_1(iot, ioh, U24_SINT);
mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR);
bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK);
bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  305 #ifdef  UHADEBUG
printf("status = 0x%x ", uhastat);
  307 #endif /*UHADEBUG*/
  309                 /*
  310                  * Process the completed operation
  311                  */
mscp = uha_mscp_phys_kv(sc, mboxval);
  313                 if (!mscp) {
printf("%s: BAD MSCP RETURNED!\n",
sc->sc_dev.dv_xname);
  316                         continue;       /* whatever it was, it'll timeout */
  317                 }
timeout_del(&mscp->xs->stimeout);
uha_done(sc, mscp);
  321                 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  322                         return (1);
  323         }
  324 }
  326 void
u24_init(sc)
  328         struct uha_softc *sc;
  329 {
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
  333         /* free OGM and ICM */
bus_space_write_1(iot, ioh, U24_OGMCMD, 0);
bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  336         /* make sure interrupts are enabled */
  337 #ifdef UHADEBUG
printf("u24_init: lmask=%02x, smask=%02x\n",
bus_space_read_1(iot, ioh, U24_LMASK),
bus_space_read_1(iot, ioh, U24_SMASK));
  341 #endif
bus_space_write_1(iot, ioh, U24_LMASK, 0xd2);   /* XXX */
bus_space_write_1(iot, ioh, U24_SMASK, 0x92);   /* XXX */
  344 }