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/uha_eisa.c

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    1 /*      $NetBSD: uha_eisa.c,v 1.22 2004/08/23 06:03:19 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  * 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 #include <sys/cdefs.h>
   40 __KERNEL_RCSID(0, "$NetBSD: uha_eisa.c,v 1.22 2004/08/23 06:03:19 thorpej Exp $");
   41 
   42 #include "opt_ddb.h"
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/device.h>
   47 #include <sys/kernel.h>
   48 #include <sys/proc.h>
   49 #include <sys/user.h>
   50 
   51 #include <machine/bus.h>
   52 #include <machine/intr.h>
   53 
   54 #include <dev/scsipi/scsi_all.h>
   55 #include <dev/scsipi/scsipi_all.h>
   56 #include <dev/scsipi/scsiconf.h>
   57 
   58 #include <dev/eisa/eisavar.h>
   59 #include <dev/eisa/eisadevs.h>
   60 
   61 #include <dev/ic/uhareg.h>
   62 #include <dev/ic/uhavar.h>
   63 
   64 #define UHA_EISA_SLOT_OFFSET    0xc80
   65 #define UHA_EISA_IOSIZE         0x020
   66 
   67 static int      uha_eisa_match(struct device *, struct cfdata *, void *);
   68 static void     uha_eisa_attach(struct device *, struct device *, void *);
   69 
   70 CFATTACH_DECL(uha_eisa, sizeof(struct uha_softc),
   71     uha_eisa_match, uha_eisa_attach, NULL, NULL);
   72 
   73 #ifndef DDB
   74 #define Debugger() panic("should call debugger here (uha_eisa.c)")
   75 #endif /* ! DDB */
   76 
   77 static int      u24_find(bus_space_tag_t, bus_space_handle_t,
   78                     struct uha_probe_data *);
   79 static void     u24_start_mbox(struct uha_softc *, struct uha_mscp *);
   80 static int      u24_poll(struct uha_softc *, struct scsipi_xfer *, int);
   81 static int      u24_intr(void *);
   82 static void     u24_init(struct uha_softc *);
   83 
   84 /*
   85  * Check the slots looking for a board we recognise
   86  * If we find one, note it's address (slot) and call
   87  * the actual probe routine to check it out.
   88  */
   89 static int
   90 uha_eisa_match(struct device *parent, struct cfdata *match, void *aux)
   91 {
   92         struct eisa_attach_args *ea = aux;
   93         bus_space_tag_t iot = ea->ea_iot;
   94         bus_space_handle_t ioh;
   95         int rv;
   96 
   97         /* must match one of our known ID strings */
   98         if (strncmp(ea->ea_idstring, "USC024", 6))
   99                 return (0);
  100 
  101         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
  102             UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
  103                 return (0);
  104 
  105         rv = u24_find(iot, ioh, NULL);
  106 
  107         bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE);
  108 
  109         return (rv);
  110 }
  111 
  112 /*
  113  * Attach all the sub-devices we can find
  114  */
  115 static void
  116 uha_eisa_attach(struct device *parent, struct device *self, void *aux)
  117 {
  118         struct eisa_attach_args *ea = aux;
  119         struct uha_softc *sc = (void *)self;
  120         bus_space_tag_t iot = ea->ea_iot;
  121         bus_dma_tag_t dmat = ea->ea_dmat;
  122         bus_space_handle_t ioh;
  123         struct uha_probe_data upd;
  124         eisa_chipset_tag_t ec = ea->ea_ec;
  125         eisa_intr_handle_t ih;
  126         const char *model, *intrstr;
  127 
  128         if (!strncmp(ea->ea_idstring, "USC024", 6))
  129                 model = EISA_PRODUCT_USC0240;
  130         else
  131                 model = "unknown model!";
  132         printf(": %s\n", model);
  133 
  134         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
  135             UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
  136                 panic("uha_eisa_attach: could not map I/O addresses");
  137 
  138         sc->sc_iot = iot;
  139         sc->sc_ioh = ioh;
  140         sc->sc_dmat = dmat;
  141         if (!u24_find(iot, ioh, &upd))
  142                 panic("uha_eisa_attach: u24_find failed!");
  143 
  144         sc->sc_dmaflags = 0;
  145 
  146         if (eisa_intr_map(ec, upd.sc_irq, &ih)) {
  147                 printf("%s: couldn't map interrupt (%d)\n",
  148                     sc->sc_dev.dv_xname, upd.sc_irq);
  149                 return;
  150         }
  151         intrstr = eisa_intr_string(ec, ih);
  152         sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
  153             u24_intr, sc);
  154         if (sc->sc_ih == NULL) {
  155                 printf("%s: couldn't establish interrupt",
  156                     sc->sc_dev.dv_xname);
  157                 if (intrstr != NULL)
  158                         printf(" at %s", intrstr);
  159                 printf("\n");
  160                 return;
  161         }
  162         printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
  163 
  164         /* Save function pointers for later use. */
  165         sc->start_mbox = u24_start_mbox;
  166         sc->poll = u24_poll;
  167         sc->init = u24_init;
  168 
  169         uha_attach(sc, &upd);
  170 }
  171 
  172 static int
  173 u24_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_probe_data *sc)
  174 {
  175         u_int8_t config0, config1, config2;
  176         int irq, drq;
  177         int resetcount = 4000;  /* 4 secs? */
  178 
  179         config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0);
  180         config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1);
  181         config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2);
  182         if ((config0 & U24_MAGIC1) == 0 ||
  183             (config1 & U24_MAGIC2) == 0)
  184                 return (0);
  185 
  186         drq = -1;
  187 
  188         switch (config0 & U24_IRQ_MASK) {
  189         case U24_IRQ10:
  190                 irq = 10;
  191                 break;
  192         case U24_IRQ11:
  193                 irq = 11;
  194                 break;
  195         case U24_IRQ14:
  196                 irq = 14;
  197                 break;
  198         case U24_IRQ15:
  199                 irq = 15;
  200                 break;
  201         default:
  202                 printf("u24_find: illegal irq setting %x\n",
  203                     config0 & U24_IRQ_MASK);
  204                 return (0);
  205         }
  206 
  207         bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST);
  208 
  209         while (--resetcount) {
  210                 if (bus_space_read_1(iot, ioh, U24_LINT))
  211                         break;
  212                 delay(1000);    /* 1 mSec per loop */
  213         }
  214         if (!resetcount) {
  215                 printf("u24_find: board timed out during reset\n");
  216                 return (0);
  217         }
  218 
  219         /* if we want to fill in softc, do so now */
  220         if (sc) {
  221                 sc->sc_irq = irq;
  222                 sc->sc_drq = drq;
  223                 sc->sc_scsi_dev = config2 & U24_HOSTID_MASK;
  224         }
  225 
  226         return (1);
  227 }
  228 
  229 static void
  230 u24_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp)
  231 {
  232         bus_space_tag_t iot = sc->sc_iot;
  233         bus_space_handle_t ioh = sc->sc_ioh;
  234         int spincount = 100000; /* 1s should be enough */
  235 
  236         while (--spincount) {
  237                 if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0)
  238                         break;
  239                 delay(100);
  240         }
  241         if (!spincount) {
  242                 printf("%s: uha_start_mbox, board not responding\n",
  243                     sc->sc_dev.dv_xname);
  244                 Debugger();
  245         }
  246 
  247         bus_space_write_4(iot, ioh, U24_OGMPTR,
  248             sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp));
  249         if (mscp->flags & MSCP_ABORT)
  250                 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80);
  251         else
  252                 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01);
  253         bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL);
  254 
  255         if ((mscp->xs->xs_control & XS_CTL_POLL) == 0)
  256                 callout_reset(&mscp->xs->xs_callout,
  257                     mstohz(mscp->timeout), uha_timeout, mscp);
  258 }
  259 
  260 static int
  261 u24_poll(struct uha_softc *sc, struct scsipi_xfer *xs, int count)
  262 {
  263         bus_space_tag_t iot = sc->sc_iot;
  264         bus_space_handle_t ioh = sc->sc_ioh;
  265 
  266         while (count) {
  267                 /*
  268                  * If we had interrupts enabled, would we
  269                  * have got an interrupt?
  270                  */
  271                 if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP)
  272                         u24_intr(sc);
  273                 if (xs->xs_status & XS_STS_DONE)
  274                         return (0);
  275                 delay(1000);
  276                 count--;
  277         }
  278         return (1);
  279 }
  280 
  281 static int
  282 u24_intr(void *arg)
  283 {
  284         struct uha_softc *sc = arg;
  285         bus_space_tag_t iot = sc->sc_iot;
  286         bus_space_handle_t ioh = sc->sc_ioh;
  287         struct uha_mscp *mscp;
  288         u_char uhastat;
  289         u_long mboxval;
  290 
  291 #ifdef  UHADEBUG
  292         printf("%s: uhaintr ", sc->sc_dev.dv_xname);
  293 #endif /*UHADEBUG */
  294 
  295         if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  296                 return (0);
  297 
  298         for (;;) {
  299                 /*
  300                  * First get all the information and then
  301                  * acknowledge the interrupt
  302                  */
  303                 uhastat = bus_space_read_1(iot, ioh, U24_SINT);
  304                 mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR);
  305                 bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK);
  306                 bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  307 
  308 #ifdef  UHADEBUG
  309                 printf("status = 0x%x ", uhastat);
  310 #endif /*UHADEBUG*/
  311 
  312                 /*
  313                  * Process the completed operation
  314                  */
  315                 mscp = uha_mscp_phys_kv(sc, mboxval);
  316                 if (!mscp) {
  317                         printf("%s: BAD MSCP RETURNED!\n",
  318                             sc->sc_dev.dv_xname);
  319                         continue;       /* whatever it was, it'll timeout */
  320                 }
  321                 callout_stop(&mscp->xs->xs_callout);
  322                 uha_done(sc, mscp);
  323 
  324                 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  325                         return (1);
  326         }
  327 }
  328 
  329 static void
  330 u24_init(struct uha_softc *sc)
  331 {
  332         bus_space_tag_t iot = sc->sc_iot;
  333         bus_space_handle_t ioh = sc->sc_ioh;
  334 
  335         /* free OGM and ICM */
  336         bus_space_write_1(iot, ioh, U24_OGMCMD, 0);
  337         bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  338         /* make sure interrupts are enabled */
  339 #ifdef UHADEBUG
  340         printf("u24_init: lmask=%02x, smask=%02x\n",
  341             bus_space_read_1(iot, ioh, U24_LMASK),
  342             bus_space_read_1(iot, ioh, U24_SMASK));
  343 #endif
  344         bus_space_write_1(iot, ioh, U24_LMASK, 0xd2);   /* XXX */
  345         bus_space_write_1(iot, ioh, U24_SMASK, 0x92);   /* XXX */
  346 }

Cache object: d6132e2eb46c907f1ecbaec96d455df1


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