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 1.33 2009/12/04 11:13:04 njoly 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 1.33 2009/12/04 11:13:04 njoly 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(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 /*
   77  * Check the slots looking for a board we recognise
   78  * If we find one, note it's address (slot) and call
   79  * the actual probe routine to check it out.
   80  */
   81 static int
   82 uha_eisa_match(device_t parent, cfdata_t match,
   83     void *aux)
   84 {
   85         struct eisa_attach_args *ea = aux;
   86         bus_space_tag_t iot = ea->ea_iot;
   87         bus_space_handle_t ioh;
   88         int rv;
   89 
   90         /* must match one of our known ID strings */
   91         if (strncmp(ea->ea_idstring, "USC024", 6))
   92                 return (0);
   93 
   94         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
   95             UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
   96                 return (0);
   97 
   98         rv = u24_find(iot, ioh, NULL);
   99 
  100         bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE);
  101 
  102         return (rv);
  103 }
  104 
  105 /*
  106  * Attach all the sub-devices we can find
  107  */
  108 static void
  109 uha_eisa_attach(device_t parent, device_t self, void *aux)
  110 {
  111         struct eisa_attach_args *ea = aux;
  112         struct uha_softc *sc = device_private(self);
  113         bus_space_tag_t iot = ea->ea_iot;
  114         bus_dma_tag_t dmat = ea->ea_dmat;
  115         bus_space_handle_t ioh;
  116         struct uha_probe_data upd;
  117         eisa_chipset_tag_t ec = ea->ea_ec;
  118         eisa_intr_handle_t ih;
  119         const char *model, *intrstr;
  120 
  121         if (!strncmp(ea->ea_idstring, "USC024", 6))
  122                 model = EISA_PRODUCT_USC0240;
  123         else
  124                 model = "unknown model!";
  125         printf(": %s\n", model);
  126 
  127         if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
  128             UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
  129                 panic("uha_eisa_attach: could not map I/O addresses");
  130 
  131         sc->sc_iot = iot;
  132         sc->sc_ioh = ioh;
  133         sc->sc_dmat = dmat;
  134         if (!u24_find(iot, ioh, &upd))
  135                 panic("uha_eisa_attach: u24_find failed!");
  136 
  137         sc->sc_dmaflags = 0;
  138 
  139         if (eisa_intr_map(ec, upd.sc_irq, &ih)) {
  140                 aprint_error_dev(&sc->sc_dev, "couldn't map interrupt (%d)\n",
  141                     upd.sc_irq);
  142                 return;
  143         }
  144         intrstr = eisa_intr_string(ec, ih);
  145         sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
  146             u24_intr, sc);
  147         if (sc->sc_ih == NULL) {
  148                 aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt");
  149                 if (intrstr != NULL)
  150                         aprint_error(" at %s", intrstr);
  151                 aprint_error("\n");
  152                 return;
  153         }
  154         aprint_normal_dev(&sc->sc_dev, "interrupting at %s\n", intrstr);
  155 
  156         /* Save function pointers for later use. */
  157         sc->start_mbox = u24_start_mbox;
  158         sc->poll = u24_poll;
  159         sc->init = u24_init;
  160 
  161         uha_attach(sc, &upd);
  162 }
  163 
  164 static int
  165 u24_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_probe_data *sc)
  166 {
  167         u_int8_t config0, config1, config2;
  168         int irq, drq;
  169         int resetcount = 4000;  /* 4 secs? */
  170 
  171         config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0);
  172         config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1);
  173         config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2);
  174         if ((config0 & U24_MAGIC1) == 0 ||
  175             (config1 & U24_MAGIC2) == 0)
  176                 return (0);
  177 
  178         drq = -1;
  179 
  180         switch (config0 & U24_IRQ_MASK) {
  181         case U24_IRQ10:
  182                 irq = 10;
  183                 break;
  184         case U24_IRQ11:
  185                 irq = 11;
  186                 break;
  187         case U24_IRQ14:
  188                 irq = 14;
  189                 break;
  190         case U24_IRQ15:
  191                 irq = 15;
  192                 break;
  193         default:
  194                 printf("u24_find: illegal irq setting %x\n",
  195                     config0 & U24_IRQ_MASK);
  196                 return (0);
  197         }
  198 
  199         bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST);
  200 
  201         while (--resetcount) {
  202                 if (bus_space_read_1(iot, ioh, U24_LINT))
  203                         break;
  204                 delay(1000);    /* 1 mSec per loop */
  205         }
  206         if (!resetcount) {
  207                 printf("u24_find: board timed out during reset\n");
  208                 return (0);
  209         }
  210 
  211         /* if we want to fill in softc, do so now */
  212         if (sc) {
  213                 sc->sc_irq = irq;
  214                 sc->sc_drq = drq;
  215                 sc->sc_scsi_dev = config2 & U24_HOSTID_MASK;
  216         }
  217 
  218         return (1);
  219 }
  220 
  221 static void
  222 u24_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp)
  223 {
  224         bus_space_tag_t iot = sc->sc_iot;
  225         bus_space_handle_t ioh = sc->sc_ioh;
  226         int spincount = 100000; /* 1s should be enough */
  227 
  228         while (--spincount) {
  229                 if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0)
  230                         break;
  231                 delay(100);
  232         }
  233         if (!spincount) {
  234                 aprint_error_dev(&sc->sc_dev, "uha_start_mbox, board not responding\n");
  235                 Debugger();
  236         }
  237 
  238         bus_space_write_4(iot, ioh, U24_OGMPTR,
  239             sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp));
  240         if (mscp->flags & MSCP_ABORT)
  241                 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80);
  242         else
  243                 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01);
  244         bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL);
  245 
  246         if ((mscp->xs->xs_control & XS_CTL_POLL) == 0)
  247                 callout_reset(&mscp->xs->xs_callout,
  248                     mstohz(mscp->timeout), uha_timeout, mscp);
  249 }
  250 
  251 static int
  252 u24_poll(struct uha_softc *sc, struct scsipi_xfer *xs, int count)
  253 {
  254         bus_space_tag_t iot = sc->sc_iot;
  255         bus_space_handle_t ioh = sc->sc_ioh;
  256 
  257         while (count) {
  258                 /*
  259                  * If we had interrupts enabled, would we
  260                  * have got an interrupt?
  261                  */
  262                 if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP)
  263                         u24_intr(sc);
  264                 if (xs->xs_status & XS_STS_DONE)
  265                         return (0);
  266                 delay(1000);
  267                 count--;
  268         }
  269         return (1);
  270 }
  271 
  272 static int
  273 u24_intr(void *arg)
  274 {
  275         struct uha_softc *sc = arg;
  276         bus_space_tag_t iot = sc->sc_iot;
  277         bus_space_handle_t ioh = sc->sc_ioh;
  278         struct uha_mscp *mscp;
  279         u_char uhastat;
  280         u_long mboxval;
  281 
  282 #ifdef  UHADEBUG
  283         printf("%s: uhaintr ", device_xname(&sc->sc_dev));
  284 #endif /*UHADEBUG */
  285 
  286         if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  287                 return (0);
  288 
  289         for (;;) {
  290                 /*
  291                  * First get all the information and then
  292                  * acknowledge the interrupt
  293                  */
  294                 uhastat = bus_space_read_1(iot, ioh, U24_SINT);
  295                 mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR);
  296                 bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK);
  297                 bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  298 
  299 #ifdef  UHADEBUG
  300                 printf("status = 0x%x ", uhastat);
  301 #endif /*UHADEBUG*/
  302 
  303                 /*
  304                  * Process the completed operation
  305                  */
  306                 mscp = uha_mscp_phys_kv(sc, mboxval);
  307                 if (!mscp) {
  308                         printf("%s: BAD MSCP RETURNED!\n",
  309                             device_xname(&sc->sc_dev));
  310                         continue;       /* whatever it was, it'll timeout */
  311                 }
  312                 callout_stop(&mscp->xs->xs_callout);
  313                 uha_done(sc, mscp);
  314 
  315                 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
  316                         return (1);
  317         }
  318 }
  319 
  320 static void
  321 u24_init(struct uha_softc *sc)
  322 {
  323         bus_space_tag_t iot = sc->sc_iot;
  324         bus_space_handle_t ioh = sc->sc_ioh;
  325 
  326         /* free OGM and ICM */
  327         bus_space_write_1(iot, ioh, U24_OGMCMD, 0);
  328         bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
  329         /* make sure interrupts are enabled */
  330 #ifdef UHADEBUG
  331         printf("u24_init: lmask=%02x, smask=%02x\n",
  332             bus_space_read_1(iot, ioh, U24_LMASK),
  333             bus_space_read_1(iot, ioh, U24_SMASK));
  334 #endif
  335         bus_space_write_1(iot, ioh, U24_LMASK, 0xd2);   /* XXX */
  336         bus_space_write_1(iot, ioh, U24_SMASK, 0x92);   /* XXX */
  337 }

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