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  * $FreeBSD: releng/5.0/sys/dev/ar/if_ar_isa.c 75541 2001-04-16 13:20:39Z jhay $
   29  */
   30 
   31 /*
   32  * Programming assumptions and other issues.
   33  *
   34  * The descriptors of a DMA channel will fit in a 16K memory window.
   35  *
   36  * The buffers of a transmit DMA channel will fit in a 16K memory window.
   37  *
   38  * Only the ISA bus cards with X.21 and V.35 is tested.
   39  *
   40  * When interface is going up, handshaking is set and it is only cleared
   41  * when the interface is down'ed.
   42  *
   43  * There should be a way to set/reset Raw HDLC/PPP, Loopback, DCE/DTE,
   44  * internal/external clock, etc.....
   45  *
   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 <machine/bus_pio.h>
   56 #include <machine/bus_memio.h>
   57 #include <sys/rman.h>
   58 
   59 #include <isa/isavar.h>
   60 #include "isa_if.h"
   61 
   62 #include <dev/ic/hd64570.h>
   63 #include <dev/ar/if_arregs.h>
   64 
   65 #ifdef TRACE
   66 #define TRC(x)               x
   67 #else
   68 #define TRC(x)
   69 #endif
   70 
   71 #define TRCL(x)              x
   72 
   73 static int ar_isa_probe (device_t);
   74 static int ar_isa_attach (device_t);
   75 
   76 static struct isa_pnp_id ar_ids[] = {
   77         {0,             NULL}
   78 };
   79 
   80 static device_method_t ar_methods[] = {
   81         DEVMETHOD(device_probe,         ar_isa_probe),
   82         DEVMETHOD(device_attach,        ar_isa_attach),
   83         DEVMETHOD(device_detach,        ar_detach),
   84         { 0, 0 }
   85 };
   86 
   87 static driver_t ar_isa_driver = {
   88         "ar",
   89         ar_methods,
   90         sizeof (struct ar_hardc)
   91 };
   92 
   93 devclass_t ar_devclass;
   94 
   95 DRIVER_MODULE(if_ar, isa, ar_isa_driver, ar_devclass, 0, 0);
   96 
   97 /*
   98  * Probe to see if it is there.
   99  * Get its information and fill it in.
  100  */
  101 static int
  102 ar_isa_probe(device_t device)
  103 {
  104         int error;
  105         u_long membase, memsize, port_start, port_count;
  106 
  107         error = ISA_PNP_PROBE(device_get_parent(device), device, ar_ids);
  108         if(error == ENXIO || error == 0)
  109                 return (error);
  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         error = bus_get_resource(device, SYS_RES_IOPORT, 0, &port_start,
  122             &port_count);
  123 
  124         if((inb(port_start + AR_ID_5) != '5') ||
  125            (inb(port_start + AR_ID_7) != '7') ||
  126            (inb(port_start + AR_ID_0) != '')) {
  127                 ar_deallocate_resources(device);
  128                 return (ENXIO);
  129         }
  130         membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
  131         memsize = inb(port_start + AR_REV);
  132         memsize = 1 << ((memsize & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
  133         memsize *= ARC_WIN_SIZ;
  134         error = bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize);
  135         ar_deallocate_resources(device);
  136 
  137         return (error);
  138 }
  139 
  140 /*
  141  * Malloc memory for the softc structures.
  142  * Reset the card to put it in a known state.
  143  * Register the ports on the adapter.
  144  * Fill in the info for each port.
  145  * Attach each port to sppp and bpf.
  146  */
  147 static int
  148 ar_isa_attach(device_t device)
  149 {
  150         u_int tmp;
  151         u_long irq, junk;
  152         struct ar_hardc *hc;
  153 
  154         hc = (struct ar_hardc *)device_get_softc(device);
  155         if(ar_allocate_ioport(device, 0, ARC_IO_SIZ))
  156                 return (ENXIO);
  157         hc->bt = rman_get_bustag(hc->res_ioport);
  158         hc->bh = rman_get_bushandle(hc->res_ioport);
  159 
  160         hc->iobase = rman_get_start(hc->res_ioport);
  161 
  162         tmp = inb(hc->iobase + AR_BMI);
  163         hc->bustype = tmp & AR_BUS_MSK;
  164         hc->memsize = (tmp & AR_MEM_MSK) >> AR_MEM_SHFT;
  165         hc->memsize = 1 << hc->memsize;
  166         hc->memsize <<= 16;
  167         hc->interface[0] = (tmp & AR_IFACE_MSK);
  168         hc->interface[1] = hc->interface[0];
  169         hc->interface[2] = hc->interface[0];
  170         hc->interface[3] = hc->interface[0];
  171         tmp = inb(hc->iobase + AR_REV);
  172         hc->revision = tmp & AR_REV_MSK;
  173         hc->winsize = 1 << ((tmp & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
  174         hc->winsize *= ARC_WIN_SIZ;
  175         hc->winmsk = hc->winsize - 1;
  176         hc->numports = inb(hc->iobase + AR_PNUM);
  177         hc->handshake = inb(hc->iobase + AR_HNDSH);
  178 
  179         if(ar_allocate_memory(device, 0, hc->winsize))
  180                 return (ENXIO);
  181 
  182         hc->mem_start = rman_get_virtual(hc->res_memory);
  183         hc->mem_end = hc->mem_start + hc->winsize;
  184         hc->cunit = device_get_unit(device);
  185 
  186         switch(hc->interface[0]) {
  187         case AR_IFACE_EIA_232:
  188                 printf("ar%d: The EIA 232 interface is not supported.\n",
  189                         hc->cunit);
  190                 ar_deallocate_resources(device);
  191                 return (ENXIO);
  192         case AR_IFACE_V_35:
  193                 break;
  194         case AR_IFACE_EIA_530:
  195                 printf("ar%d: WARNING: The EIA 530 interface is untested.\n",
  196                         hc->cunit);
  197                 break;
  198         case AR_IFACE_X_21:
  199                 break;
  200         case AR_IFACE_COMBO:
  201                 printf("ar%d: WARNING: The COMBO interface is untested.\n",
  202                         hc->cunit);
  203                 break;
  204         }
  205 
  206         /*
  207          * Do a little sanity check.
  208          */
  209         if((hc->numports > NPORT) || (hc->memsize > (512*1024))) {
  210                 ar_deallocate_resources(device);
  211                 return (ENXIO);
  212         }
  213 
  214         if(ar_allocate_irq(device, 0, 1))
  215                 return (ENXIO);
  216 
  217         if(bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
  218                 ar_deallocate_resources(device);
  219                 return (ENXIO);
  220         }
  221         hc->isa_irq = irq;
  222 
  223         if(ar_attach(device)) {
  224                 ar_deallocate_resources(device);
  225                 return (ENXIO);
  226         }
  227 
  228         return (0);
  229 }
  230 
  231 
  232 
  233 
  234 
  235 
  236 
  237 /*
  238  ********************************* END ************************************
  239  */

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FreeBSD/Linux Kernel Cross Reference sys/dev/ar/if_ar_isa.c

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sys/dev/ar/if_ar_isa.c