FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/depca.c

     /*      $NetBSD: depca.c,v 1.19 2021/08/07 16:19:12 thorpej Exp $       */
     
     /*-
      * Copyright (c) 1997, 1998, 2000 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
      * Simulation Facility, NASA Ames Research Center.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*-
     * Copyright (c) 1992, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * This code is derived from software contributed to Berkeley by
     * Ralph Campbell and Rick Macklem.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)if_le.c     8.2 (Berkeley) 11/16/93
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: depca.c,v 1.19 2021/08/07 16:19:12 thorpej Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/mbuf.h>
    #include <sys/syslog.h>
    #include <sys/socket.h>
    #include <sys/device.h>
    
    #include <net/if.h>
    #include <net/if_ether.h>
    #include <net/if_media.h>
    
    #include <sys/cpu.h>
    #include <sys/intr.h>
    #include <sys/bus.h>
    
    #include <dev/isa/isareg.h>
    #include <dev/isa/isavar.h>
    
    #include <dev/ic/lancereg.h>
    #include <dev/ic/lancevar.h>
    #include <dev/ic/am7990reg.h>
    #include <dev/ic/am7990var.h>
    #include <dev/ic/depcareg.h>
    #include <dev/ic/depcavar.h>
    
    struct le_depca_softc {
            struct am7990_softc sc_am7990;  /* glue to MI code */
    
            void *sc_ih;
    };
   
   int     le_depca_match(device_t, cfdata_t, void *);
   void    le_depca_attach(device_t, device_t, void *);
   
   CFATTACH_DECL_NEW(le_depca, sizeof(struct le_depca_softc),
       le_depca_match, le_depca_attach, NULL, NULL);
   
   void    depca_copytobuf(struct lance_softc *, void *, int, int);
   void    depca_copyfrombuf(struct lance_softc *, void *, int, int);
   void    depca_zerobuf(struct lance_softc *, int, int);
   
   struct depca_attach_args {
           const char *da_name;
   };
   
   int     depca_print(void *, const char *);
   
   void
   depca_attach(struct depca_softc *sc)
   {
           struct depca_attach_args da;
   
           da.da_name = "le";
   
           (void)config_found(sc->sc_dev, &da, depca_print, CFARGS_NONE);
   }
   
   int
   depca_print(void *aux, const char *pnp)
   {
           struct depca_attach_args *da = aux;
   
           if (pnp)
                   aprint_normal("%s at %s", da->da_name, pnp);
   
           return (UNCONF);
   }
   
   void
   depca_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
   {
           struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
   
           bus_space_write_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_RAP, port);
           bus_space_write_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_RDP, val);
   }
   
   uint16_t
   depca_rdcsr(struct lance_softc *sc, uint16_t port)
   {
           struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
   
           bus_space_write_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_RAP, port);
           return (bus_space_read_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_RDP));
   }
   
   int
   depca_readprom(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t *laddr)
   {
           int port, i;
   
           /*
            * Extract the physical MAC address from the ROM.
            *
            * The address PROM is 32 bytes wide, and we access it through
            * a single I/O port.  On each read, it rotates to the next
            * position.  We find the ethernet address by looking for a
            * particular sequence of bytes (0xff, 0x00, 0x55, 0xaa, 0xff,
            * 0x00, 0x55, 0xaa), and then reading the next 8 bytes (the
            * ethernet address and a checksum).
            *
            * It appears that the PROM can be at one of two locations, so
            * we just try both.
            */
           port = DEPCA_ADP;
           for (i = 0; i < 32; i++)
                   if (bus_space_read_1(iot, ioh, port) == 0xff &&
                       bus_space_read_1(iot, ioh, port) == 0x00 &&
                       bus_space_read_1(iot, ioh, port) == 0x55 &&
                       bus_space_read_1(iot, ioh, port) == 0xaa &&
                       bus_space_read_1(iot, ioh, port) == 0xff &&
                       bus_space_read_1(iot, ioh, port) == 0x00 &&
                       bus_space_read_1(iot, ioh, port) == 0x55 &&
                       bus_space_read_1(iot, ioh, port) == 0xaa)
                           goto found;
           port = DEPCA_ADP + 1;
           for (i = 0; i < 32; i++)
                   if (bus_space_read_1(iot, ioh, port) == 0xff &&
                       bus_space_read_1(iot, ioh, port) == 0x00 &&
                       bus_space_read_1(iot, ioh, port) == 0x55 &&
                       bus_space_read_1(iot, ioh, port) == 0xaa &&
                       bus_space_read_1(iot, ioh, port) == 0xff &&
                       bus_space_read_1(iot, ioh, port) == 0x00 &&
                       bus_space_read_1(iot, ioh, port) == 0x55 &&
                       bus_space_read_1(iot, ioh, port) == 0xaa)
                           goto found;
           aprint_error("depca: address not found\n");
           return (-1);
   
   found:
   
           if (laddr) {
                   for (i = 0; i < 6; i++)
                           laddr[i] = bus_space_read_1(iot, ioh, port);
           }
   
   #if 0
           sum =
               (laddr[0] <<  2) +
               (laddr[1] << 10) +
               (laddr[2] <<  1) +
               (laddr[3] <<  9) +
               (laddr[4] <<  0) +
               (laddr[5] <<  8);
           sum = (sum & 0xffff) + (sum >> 16);
           sum = (sum & 0xffff) + (sum >> 16);
   
           rom_sum = bus_space_read_1(iot, ioh, port);
           rom_sum |= bus_space_read_1(iot, ioh, port) << 8;
   
           if (sum != rom_sum) {
                   aprint_error("depca: checksum mismatch; "
                       "calculated %04x != read %04x", sum, rom_sum);
                   return (-1);
           }
   #endif
   
           return (0);
   }
   
   int
   le_depca_match(device_t parent, cfdata_t cf, void *aux)
   {
           struct depca_attach_args *da = aux;
   
           return (strcmp(da->da_name, cf->cf_name) == 0);
   }
   
   void
   le_depca_attach(device_t parent, device_t self, void *aux)
   {
           struct depca_softc *dsc = device_private(parent);
           struct le_depca_softc *lesc = device_private(self);
           struct lance_softc *sc = &lesc->sc_am7990.lsc;
           uint8_t val;
           int i;
   
           sc->sc_dev = self;
           aprint_error("\n");
   
           /* I/O and memory spaces already mapped. */
   
           if (depca_readprom(dsc->sc_iot, dsc->sc_ioh, sc->sc_enaddr)) {
                   aprint_error_dev(self, "can't read PROM\n");
                   return;
           }
   
           bus_space_write_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_CSR,
               DEPCA_CSR_DUM | DEPCA_CSR_IEN | DEPCA_CSR_SHE |
               (dsc->sc_memsize == 32*1024 ? DEPCA_CSR_LOW32K : 0));
   
           val = 0xff;
           for (;;) {
                   uint8_t cv;
   
                   bus_space_set_region_1(dsc->sc_memt, dsc->sc_memh, 0, val,
                       dsc->sc_memsize);
                   for (i = 0; i < dsc->sc_memsize; i++) {
                           cv = bus_space_read_1(dsc->sc_memt, dsc->sc_memh, i);
                           if (cv != val) {
                                   aprint_error_dev(self,
                                       "failed to clear memory at %d "
                                       "(0x%02x != 0x%02x)\n",
                                       i, cv, val);
                                   return;
                           }
                   }
                   if (val == 0x00)
                           break;
                   val -= 0x55;
           }
   
           sc->sc_conf3 = LE_C3_ACON;
           sc->sc_mem = 0;                 /* Not used. */
           sc->sc_addr = 0;
           sc->sc_memsize = dsc->sc_memsize;
   
           sc->sc_copytodesc = depca_copytobuf;
           sc->sc_copyfromdesc = depca_copyfrombuf;
           sc->sc_copytobuf = depca_copytobuf;
           sc->sc_copyfrombuf = depca_copyfrombuf;
           sc->sc_zerobuf = depca_zerobuf;
   
           sc->sc_rdcsr = depca_rdcsr;
           sc->sc_wrcsr = depca_wrcsr;
           sc->sc_hwinit = NULL;
   
           aprint_error("%s", device_xname(self));
           am7990_config(&lesc->sc_am7990);
   
           lesc->sc_ih = (*dsc->sc_intr_establish)(dsc, sc);
   }
   
   /*
    * Controller interrupt.
    */
   int
   depca_intredge(void *arg)
   {
   
           if (am7990_intr(arg) == 0)
                   return (0);
           for (;;)
                   if (am7990_intr(arg) == 0)
                           return (1);
   }
   
   /*
    * DEPCA shared memory access functions.
    */
   
   void
   depca_copytobuf(struct lance_softc *sc, void *from, int boff, int len)
   {
           struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
   
           bus_space_write_region_1(dsc->sc_memt, dsc->sc_memh, boff,
               from, len);
   }
   
   void
   depca_copyfrombuf(struct lance_softc *sc, void *to, int boff, int len)
   {
           struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
   
           bus_space_read_region_1(dsc->sc_memt, dsc->sc_memh, boff,
               to, len);
   }
   
   void
   depca_zerobuf(struct lance_softc *sc, int boff, int len)
   {
           struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
   
           bus_space_set_region_1(dsc->sc_memt, dsc->sc_memh, boff,
               0x00, len);
   }

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