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/ar/if_ar_isa.c

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    1 /*-
    2  * Copyright (c) 1995 - 2001 John Hay.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  * 3. Neither the name of the author nor the names of any co-contributors
   13  *    may be used to endorse or promote products derived from this software
   14  *    without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY John Hay ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL John Hay BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 /*
   33  * Programming assumptions and other issues.
   34  *
   35  * The descriptors of a DMA channel will fit in a 16K memory window.
   36  *
   37  * The buffers of a transmit DMA channel will fit in a 16K memory window.
   38  *
   39  * Only the ISA bus cards with X.21 and V.35 is tested.
   40  *
   41  * When interface is going up, handshaking is set and it is only cleared
   42  * when the interface is down'ed.
   43  *
   44  * There should be a way to set/reset Raw HDLC/PPP, Loopback, DCE/DTE,
   45  * internal/external clock, etc.....
   46  */
   47 
   48 #include <sys/param.h>
   49 #include <sys/systm.h>
   50 #include <sys/kernel.h>
   51 #include <sys/module.h>
   52 #include <sys/bus.h>
   53 #include <machine/bus.h>
   54 #include <machine/resource.h>
   55 #include <sys/rman.h>
   56 
   57 #include <isa/isavar.h>
   58 #include "isa_if.h"
   59 
   60 #include <dev/ic/hd64570.h>
   61 #include <dev/ar/if_arregs.h>
   62 
   63 #ifdef TRACE
   64 #define TRC(x)               x
   65 #else
   66 #define TRC(x)
   67 #endif
   68 
   69 #define TRCL(x)              x
   70 
   71 static int ar_isa_probe (device_t);
   72 static int ar_isa_attach (device_t);
   73 
   74 static struct isa_pnp_id ar_ids[] = {
   75         {0,             NULL}
   76 };
   77 
   78 static device_method_t ar_methods[] = {
   79         DEVMETHOD(device_probe,         ar_isa_probe),
   80         DEVMETHOD(device_attach,        ar_isa_attach),
   81         DEVMETHOD(device_detach,        ar_detach),
   82         { 0, 0 }
   83 };
   84 
   85 static driver_t ar_isa_driver = {
   86         "ar",
   87         ar_methods,
   88         sizeof (struct ar_hardc)
   89 };
   90 
   91 DRIVER_MODULE(ar, isa, ar_isa_driver, ar_devclass, 0, 0);
   92 MODULE_DEPEND(ar, isa, 1, 1, 1);
   93 
   94 /*
   95  * Probe to see if it is there.
   96  * Get its information and fill it in.
   97  */
   98 static int
   99 ar_isa_probe(device_t device)
  100 {
  101         int error;
  102         u_long membase, memsize;
  103         struct ar_hardc *hc;
  104 
  105         error = ISA_PNP_PROBE(device_get_parent(device), device, ar_ids);
  106         if(error == ENXIO || error == 0)
  107                 return (error);
  108 
  109         hc = (struct ar_hardc *)device_get_softc(device);
  110 
  111         if((error = ar_allocate_ioport(device, 0, ARC_IO_SIZ))) {
  112                 return (ENXIO);
  113         }
  114 
  115         /*
  116          * Now see if the card is realy there.
  117          *
  118          * XXX For now I just check the undocumented ports
  119          * for "570". We will probably have to do more checking.
  120          */
  121         if((ar_inb(hc, AR_ID_5) != '5') ||
  122            (ar_inb(hc, AR_ID_7) != '7') ||
  123            (ar_inb(hc, AR_ID_0) != '')) {
  124                 ar_deallocate_resources(device);
  125                 return (ENXIO);
  126         }
  127         membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
  128         memsize = ar_inb(hc, AR_REV);
  129         memsize = 1 << ((memsize & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
  130         memsize *= ARC_WIN_SIZ;
  131         error = bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize);
  132         ar_deallocate_resources(device);
  133 
  134         return (error);
  135 }
  136 
  137 /*
  138  * Malloc memory for the softc structures.
  139  * Reset the card to put it in a known state.
  140  * Register the ports on the adapter.
  141  * Fill in the info for each port.
  142  * Attach each port to sppp and bpf.
  143  */
  144 static int
  145 ar_isa_attach(device_t device)
  146 {
  147         u_int tmp;
  148         u_long irq, junk;
  149         struct ar_hardc *hc;
  150 
  151         hc = (struct ar_hardc *)device_get_softc(device);
  152         if(ar_allocate_ioport(device, 0, ARC_IO_SIZ))
  153                 return (ENXIO);
  154 
  155         tmp = ar_inb(hc, AR_BMI);
  156         hc->bustype = tmp & AR_BUS_MSK;
  157         hc->memsize = (tmp & AR_MEM_MSK) >> AR_MEM_SHFT;
  158         hc->memsize = 1 << hc->memsize;
  159         hc->memsize <<= 16;
  160         hc->interface[0] = (tmp & AR_IFACE_MSK);
  161         hc->interface[1] = hc->interface[0];
  162         hc->interface[2] = hc->interface[0];
  163         hc->interface[3] = hc->interface[0];
  164         tmp = ar_inb(hc, AR_REV);
  165         hc->revision = tmp & AR_REV_MSK;
  166         hc->winsize = 1 << ((tmp & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
  167         hc->winsize *= ARC_WIN_SIZ;
  168         hc->winmsk = hc->winsize - 1;
  169         hc->numports = ar_inb(hc, AR_PNUM);
  170         hc->handshake = ar_inb(hc, AR_HNDSH);
  171 
  172         if(ar_allocate_memory(device, 0, hc->winsize))
  173                 return (ENXIO);
  174 
  175         hc->mem_start = rman_get_virtual(hc->res_memory);
  176         hc->mem_end = hc->mem_start + hc->winsize;
  177         hc->cunit = device_get_unit(device);
  178 
  179         switch(hc->interface[0]) {
  180         case AR_IFACE_EIA_232:
  181                 printf("ar%d: The EIA 232 interface is not supported.\n",
  182                         hc->cunit);
  183                 ar_deallocate_resources(device);
  184                 return (ENXIO);
  185         case AR_IFACE_V_35:
  186                 break;
  187         case AR_IFACE_EIA_530:
  188                 printf("ar%d: WARNING: The EIA 530 interface is untested.\n",
  189                         hc->cunit);
  190                 break;
  191         case AR_IFACE_X_21:
  192                 break;
  193         case AR_IFACE_COMBO:
  194                 printf("ar%d: WARNING: The COMBO interface is untested.\n",
  195                         hc->cunit);
  196                 break;
  197         }
  198 
  199         /*
  200          * Do a little sanity check.
  201          */
  202         if((hc->numports > NPORT) || (hc->memsize > (512*1024))) {
  203                 ar_deallocate_resources(device);
  204                 return (ENXIO);
  205         }
  206 
  207         if(ar_allocate_irq(device, 0, 1))
  208                 return (ENXIO);
  209 
  210         if(bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
  211                 ar_deallocate_resources(device);
  212                 return (ENXIO);
  213         }
  214         hc->isa_irq = irq;
  215 
  216         if(ar_attach(device)) {
  217                 ar_deallocate_resources(device);
  218                 return (ENXIO);
  219         }
  220 
  221         return (0);
  222 }
  223 
  224 /*
  225  ********************************* END ************************************
  226  */

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