root/dev/isa/if_ec.c

DEFINITIONS

1. ec_probe
2. ec_attach
3. ec_fake_test_mem
4. ec_test_mem
5. ec_readmem
6. ec_write_mbuf
7. ec_ring_copy
8. ec_read_hdr
9. ec_media_init
10. ec_mediachange
11. ec_mediastatus
12. ec_init_card
13. ec_set_media

    1 /*      $OpenBSD: if_ec.c,v 1.10 2006/10/20 17:02:24 brad Exp $ */
    2 /*      $NetBSD: if_ec.c,v 1.9 1998/07/05 06:49:12 jonathan Exp $       */
    4 /*-
    5  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   10  * NASA Ames Research Center.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. All advertising materials mentioning features or use of this software
   21  *    must display the following acknowledgement:
   22  *      This product includes software developed by the NetBSD
   23  *      Foundation, Inc. and its contributors.
   24  * 4. Neither the name of The NetBSD Foundation nor the names of its
   25  *    contributors may be used to endorse or promote products derived
   26  *    from this software without specific prior written permission.
   27  *
   28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   38  * POSSIBILITY OF SUCH DAMAGE.
   39  */
   41 /*
   42  * Device driver for National Semiconductor DS8390/WD83C690 based ethernet
   43  * adapters.
   44  *
   45  * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
   46  *
   47  * Copyright (C) 1993, David Greenman.  This software may be used, modified,
   48  * copied, distributed, and sold, in both source and binary form provided that
   49  * the above copyright and these terms are retained.  Under no circumstances is
   50  * the author responsible for the proper functioning of this software, nor does
   51  * the author assume any responsibility for damages incurred with its use.
   52  */
   54 /*
   55  * Device driver for the 3Com Etherlink II (3c503).
   56  */
   58 #include "bpfilter.h"
   60 #include <sys/param.h>
   61 #include <sys/systm.h>
   62 #include <sys/device.h>
   63 #include <sys/socket.h>
   64 #include <sys/mbuf.h>
   65 #include <sys/syslog.h>
   67 #include <net/if.h>
   68 #include <net/if_dl.h>
   69 #include <net/if_types.h>
   70 #include <net/if_media.h>
   72 #ifdef INET
   73 #include <netinet/in.h>
   74 #include <netinet/in_systm.h>
   75 #include <netinet/in_var.h> 
   76 #include <netinet/ip.h>
   77 #include <netinet/if_ether.h>
   78 #endif 
   80 #if NBPFILTER > 0
   81 #include <net/bpf.h>
   82 #endif
   84 #include <machine/bus.h>
   85 #include <machine/intr.h>
   87 #include <dev/isa/isareg.h>
   88 #include <dev/isa/isavar.h>
   90 #include <dev/ic/dp8390reg.h>
   91 #include <dev/ic/dp8390var.h>
   93 #include <dev/isa/if_ecreg.h>
   95 struct ec_softc {
   96         struct dp8390_softc sc_dp8390;
bus_space_tag_t sc_asict;       /* space tag for ASIC */
bus_space_handle_t sc_asich;    /* space handle for ASIC */
  101         int sc_16bitp;                  /* are we 16 bit? */
  103         void *sc_ih;                    /* interrupt handle */
  104 };
  106 int     ec_probe(struct device *, void *, void *);
  107 void    ec_attach(struct device *, struct device *, void *);
  109 struct cfattach ec_ca = {
  110         sizeof(struct ec_softc), ec_probe, ec_attach
  111 };
  113 int     ec_set_media(struct ec_softc *, int);
  115 void    ec_media_init(struct dp8390_softc *);
  117 int     ec_mediachange(struct dp8390_softc *);
  118 void    ec_mediastatus(struct dp8390_softc *, struct ifmediareq *);
  120 void    ec_init_card(struct dp8390_softc *);
  121 int     ec_write_mbuf(struct dp8390_softc *, struct mbuf *, int);
  122 int     ec_ring_copy(struct dp8390_softc *, int, caddr_t, u_short);
  123 void    ec_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *);
  124 int     ec_fake_test_mem(struct dp8390_softc *);
  125 int     ec_test_mem(struct dp8390_softc *);
  127 __inline void ec_readmem(struct ec_softc *, int, u_int8_t *, int);
  129 static const int ec_iobase[] = {
  130         0x2e0, 0x2a0, 0x280, 0x250, 0x350, 0x330, 0x310, 0x300,
  131 };
  132 #define NEC_IOBASE      (sizeof(ec_iobase) / sizeof(ec_iobase[0]))
  134 static const int ec_membase[] = {
MADDRUNK, MADDRUNK, MADDRUNK, MADDRUNK, 0xc8000, 0xcc000,
  136         0xd8000, 0xdc000,
  137 };
  138 #define NEC_MEMBASE     (sizeof(ec_membase) / sizeof(ec_membase[0]))
  140 struct cfdriver ec_cd = {
NULL, "ec", DV_IFNET
  142 };
  144 int
ec_probe(struct device *parent, void *match, void *aux)
  146 {
  147         struct isa_attach_args *ia = aux;
bus_space_tag_t nict, asict, memt;
bus_space_handle_t nich, asich, memh;
bus_size_t memsize;
  151         int nich_valid, asich_valid, memh_valid;
  152         int i, rv = 0;
u_int8_t x;
nict = asict = ia->ia_iot;
memt = ia->ia_memt;
nich_valid = asich_valid = memh_valid = 0;
  160         /*
  161          * Hmm, a 16-bit card has 16k of memory, but only an 8k window
  162          * to it.
  163          */
memsize = 8192;
  166         /* Disallow wildcarded i/o addresses. */
  167         if (ia->ia_iobase == -1 /* ISACF_PORT_DEFAULT */)
  168                 return (0);
  170         /* Disallow wildcarded mem address. */
  171         if (ia->ia_maddr == -1 /* ISACF_IOMEM_DEFAULT */)
  172                 return (0);
  174         /* Validate the i/o base. */
  175         for (i = 0; i < NEC_IOBASE; i++)
  176                 if (ia->ia_iobase == ec_iobase[i])
  177                         break;
  178         if (i == NEC_IOBASE)
  179                 return (0);
  181         /* Validate the mem base. */
  182         for (i = 0; i < NEC_MEMBASE; i++) {
  183                 if (ec_membase[i] == MADDRUNK)
  184                         continue;
  185                 if (ia->ia_maddr == ec_membase[i])
  186                         break;
  187         }
  188         if (i == NEC_MEMBASE)
  189                 return (0);
  191         /* Attempt to map the NIC space. */
  192         if (bus_space_map(nict, ia->ia_iobase + ELINK2_NIC_OFFSET,
ELINK2_NIC_PORTS, 0, &nich))
  194                 goto out;
nich_valid = 1;
  197         /* Attempt to map the ASIC space. */
  198         if (bus_space_map(asict, ia->ia_iobase + ELINK2_ASIC_OFFSET,
ELINK2_ASIC_PORTS, 0, &asich))
  200                 goto out;
asich_valid = 1;
  203         /* Attempt to map the memory space. */
  204         if (bus_space_map(memt, ia->ia_maddr, memsize, 0, &memh))
  205                 goto out;
memh_valid = 1;
  208         /*
  209          * Verify that the kernel configured I/O address matches the
  210          * board configured I/O address.
  211          *
  212          * This is really only useful to see if something that looks like
  213          * the board is there; after all, we're already talking to it at
  214          * this point.
  215          */
x = bus_space_read_1(asict, asich, ELINK2_BCFR);
  217         if (x == 0 || (x & (x - 1)) != 0)
  218                 goto out;
i = ffs(x) - 1;
  220         if (ia->ia_iobase != ec_iobase[i])
  221                 goto out;
  223         /*
  224          * ...and for the memory address.  Note we do not support
  225          * cards configured with shared memory disabled.
  226          */
x = bus_space_read_1(asict, asich, ELINK2_PCFR);
  228         if (x == 0 || (x & (x - 1)) != 0)
  229                 goto out;
i = ffs(x) - 1;
  231         if (ia->ia_maddr != ec_membase[i])
  232                 goto out;
  234         /* So, we say we've found it! */
ia->ia_iosize = ELINK2_NIC_PORTS;
ia->ia_msize = memsize;
rv = 1;
out:
  240         if (nich_valid)
bus_space_unmap(nict, nich, ELINK2_NIC_PORTS);
  242         if (asich_valid)
bus_space_unmap(asict, asich, ELINK2_ASIC_PORTS);
  244         if (memh_valid)
bus_space_unmap(memt, memh, memsize);
  246         return (rv);
  247 }
  249 void
ec_attach(struct device *parent, struct device *self, void *aux)
  251 {
  252         struct ec_softc *esc = (struct ec_softc *)self;
  253         struct dp8390_softc *sc = &esc->sc_dp8390;
  254         struct isa_attach_args *ia = aux;
bus_space_tag_t nict, asict, memt;
bus_space_handle_t nich, asich, memh;
bus_size_t memsize;
u_int8_t tmp;
  259         int i;
printf("\n");
nict = asict = ia->ia_iot;
memt = ia->ia_memt;
  266         /*
  267          * Hmm, a 16-bit card has 16k of memory, but only an 8k window
  268          * to it.
  269          */
memsize = 8192;
  272         /* Map the NIC space. */
  273         if (bus_space_map(nict, ia->ia_iobase + ELINK2_NIC_OFFSET,
ELINK2_NIC_PORTS, 0, &nich)) {
printf("%s: can't map nic i/o space\n",
sc->sc_dev.dv_xname);
  277                 return;
  278         }
  280         /* Map the ASIC space. */
  281         if (bus_space_map(asict, ia->ia_iobase + ELINK2_ASIC_OFFSET,
ELINK2_ASIC_PORTS, 0, &asich)) {
printf("%s: can't map asic i/o space\n",
sc->sc_dev.dv_xname);
  285                 return;
  286         }
  288         /* Map the memory space. */
  289         if (bus_space_map(memt, ia->ia_maddr, memsize, 0, &memh)) {
printf("%s: can't map shared memory\n",
sc->sc_dev.dv_xname);
  292                 return;
  293         }
esc->sc_asict = asict;
esc->sc_asich = asich;
sc->sc_regt = nict;
sc->sc_regh = nich;
sc->sc_buft = memt;
sc->sc_bufh = memh;
  304         /* Interface is always enabled. */
sc->sc_enabled = 1;
  307         /* Registers are linear. */
  308         for (i = 0; i < 16; i++)
sc->sc_reg_map[i] = i;
  311         /* Now we can use the NIC_{GET,PUT}() macros. */
  313         /*
  314          * Reset NIC and ASIC.  Enable on-board transeiver throughout
  315          * reset sequence since it will lock up if the cable isn't
  316          * connected if we don't.
  317          */
bus_space_write_1(asict, asich, ELINK2_CR,
ELINK2_CR_RST | ELINK2_CR_XSEL);
  321         /* Wait for a while, then un-reset it. */
delay(50);
  324         /*
  325          * The 3Com ASIC defaults to rather strange settings for the CR
  326          * after a reset.  It's important to set it again after the
  327          * following write (this is done when we map the PROM below).
  328          */
bus_space_write_1(asict, asich, ELINK2_CR, ELINK2_CR_XSEL);
  331         /* Wait a bit for the NIC to recover from the reset. */
delay(5000);
  334         /*
  335          * Get the station address from on-board ROM.
  336          *
  337          * First, map Ethernet address PROM over the top of where the NIC
  338          * registers normally appear.
  339          */
bus_space_write_1(asict, asich, ELINK2_CR,
ELINK2_CR_XSEL | ELINK2_CR_EALO);
  343         for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->sc_arpcom.ac_enaddr[i] = NIC_GET(nict, nich, i);
  346         /*
  347          * Unmap PROM - select NIC registers.  The proper setting of the
  348          * transciever is set in later in ec_init_card() via dp8390_init().
  349          */
bus_space_write_1(asict, asich, ELINK2_CR, ELINK2_CR_XSEL);
  352         /* Determine if this is an 8-bit or 16-bit board. */
  354         /* Select page 0 registers. */
NIC_PUT(nict, nich, ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
  357         /*
  358          * Attempt to clear WTS.  If it doesn't clear, then this is a
  359          * 16-bit board.
  360          */
NIC_PUT(nict, nich, ED_P0_DCR, 0);
  363         /* Select page 2 registers. */
NIC_PUT(nict, nich, ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_2 | ED_CR_STP);
  366         /* The 3c503 forces the WTS bit to a one if this is a 16-bit board. */
  367         if (NIC_GET(nict, nich, ED_P2_DCR) & ED_DCR_WTS)
esc->sc_16bitp = 1;
  369         else
esc->sc_16bitp = 0;
printf("%s: 3Com 3c503 Ethernet (%s-bit)",
sc->sc_dev.dv_xname, esc->sc_16bitp ? "16" : "8");
  375         /* Select page 0 registers. */
NIC_PUT(nict, nich, ED_P2_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
sc->cr_proto = ED_CR_RD2;
  380         /*
  381          * DCR gets:
  382          *
  383          *      FIFO threshold to 8, No auto-init Remote DMA,
  384          *      byte order=80x86.
  385          *
  386          * 16-bit cards also get word-wide DMA transfers.
  387          */
sc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS |
  389             (esc->sc_16bitp ? ED_DCR_WTS : 0);
sc->test_mem = ec_fake_test_mem;
sc->ring_copy = ec_ring_copy;
sc->write_mbuf = ec_write_mbuf;
sc->read_hdr = ec_read_hdr;
sc->sc_media_init = ec_media_init;
sc->sc_mediachange = ec_mediachange;
sc->sc_mediastatus = ec_mediastatus;
sc->mem_start = 0;
sc->mem_size = memsize;
  404         /* Do generic parts of attach. */
  405         if (dp8390_config(sc)) {
printf(": configuration failed\n");
  407                 return;
  408         }
  410         /*
  411          * We need to override the way dp8390_config() set up our
  412          * shared memory.
  413          *
  414          * We have an entire 8k window to put the transmit buffers on the
  415          * 16-bit boards.  But since the 16bit 3c503's shared memory is only
  416          * fast enough to overlap the loading of one full-size packet, trying
  417          * to load more than 2 buffers can actually leave the transmitter idle
  418          * during the load.  So 2 seems the best value.  (Although a mix of
  419          * variable-sized packets might change this assumption.  Nonetheless,
  420          * we optimize for linear transfers of same-size packets.)
  421          */
  422         if (esc->sc_16bitp) {
  423                 if (sc->sc_dev.dv_cfdata->cf_flags & DP8390_NO_MULTI_BUFFERING)
sc->txb_cnt = 1;
  425                 else
sc->txb_cnt = 2;
sc->tx_page_start = ELINK2_TX_PAGE_OFFSET_16BIT;
sc->rec_page_start = ELINK2_RX_PAGE_OFFSET_16BIT;
sc->rec_page_stop = (memsize >> ED_PAGE_SHIFT) + 
sc->rec_page_start;
sc->mem_ring = sc->mem_start;
  433         } else {
sc->txb_cnt = 1;
sc->tx_page_start = ELINK2_TX_PAGE_OFFSET_8BIT;
sc->rec_page_start = sc->tx_page_start + ED_TXBUF_SIZE;
sc->rec_page_stop = (memsize >> ED_PAGE_SHIFT) +
sc->tx_page_start;
sc->mem_ring = sc->mem_start +
  440                     (ED_TXBUF_SIZE << ED_PAGE_SHIFT);
  441         }
  443         /*
  444          * Initialize CA page start/stop registers.  Probably only needed
  445          * if doing DMA, but what the Hell.
  446          */
bus_space_write_1(asict, asich, ELINK2_PSTR, sc->rec_page_start);
bus_space_write_1(asict, asich, ELINK2_PSPR, sc->rec_page_stop);
  450         /*
  451          * Program the IRQ.
  452          */
  453         switch (ia->ia_irq) {
  454         case 9: tmp = ELINK2_IDCFR_IRQ2; break;
  455         case 3: tmp = ELINK2_IDCFR_IRQ3; break;
  456         case 4: tmp = ELINK2_IDCFR_IRQ4; break;
  457         case 5: tmp = ELINK2_IDCFR_IRQ5; break;
  458                 break;
  460         case IRQUNK:
printf("%s: wildcarded IRQ is not allowed\n",
sc->sc_dev.dv_xname);
  463                 return;
  465         default:
printf("%s: invalid IRQ %d, must be 3, 4, 5, or 9\n",
sc->sc_dev.dv_xname, ia->ia_irq);
  468                 return;
  469         }
bus_space_write_1(asict, asich, ELINK2_IDCFR, tmp);
  473         /*
  474          * Initialize the GA configuration register.  Set bank and enable
  475          * shared memory.
  476          */
bus_space_write_1(asict, asich, ELINK2_GACFR,
ELINK2_GACFR_RSEL | ELINK2_GACFR_MBS0);
  480         /*
  481          * Intialize "Vector Pointer" registers.  These gawd-awful things
  482          * are compared to 20 bits of the address on the ISA, and if they
  483          * match, the shared memory is disabled.  We se them to 0xffff0...
  484          * allegedly the reset vector.
  485          */
bus_space_write_1(asict, asich, ELINK2_VPTR2, 0xff);
bus_space_write_1(asict, asich, ELINK2_VPTR1, 0xff);
bus_space_write_1(asict, asich, ELINK2_VPTR0, 0x00);
  490         /*
  491          * Now run the real memory test.
  492          */
  493         if (ec_test_mem(sc)) {
printf("%s: memory test failed\n", sc->sc_dev.dv_xname);
  495                 return;
  496         }
  498         /* Establish interrupt handler. */
esc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
IPL_NET, dp8390_intr, sc, sc->sc_dev.dv_xname);
  501         if (esc->sc_ih == NULL)
printf("%s: can't establish interrupt\n", sc->sc_dev.dv_xname);
  503 }
  505 int
ec_fake_test_mem(struct dp8390_softc *sc)
  507 {
  508         /*
  509          * We have to do this after we initialize the GA, but we
  510          * have to do that after calling dp8390_config(), which
  511          * wants to test memory.  Put this noop here, and then
  512          * actually test memory later.
  513          */
  514         return (0);
  515 }
  517 int
ec_test_mem(struct dp8390_softc *sc)
  519 {
  520         struct ec_softc *esc = (struct ec_softc *)sc;
bus_space_tag_t memt = sc->sc_buft;
bus_space_handle_t memh = sc->sc_bufh;
bus_size_t memsize = sc->mem_size;
  524         int i;
  526         if (esc->sc_16bitp)
bus_space_set_region_2(memt, memh, 0, 0, memsize >> 1);
  528         else
bus_space_set_region_1(memt, memh, 0, 0, memsize);
  531         if (esc->sc_16bitp) {
  532                 for (i = 0; i < memsize; i += 2) {
  533                         if (bus_space_read_2(memt, memh, i) != 0)
  534                                 goto fail;
  535                 }
  536         } else {
  537                 for (i = 0; i < memsize; i++) {
  538                         if (bus_space_read_1(memt, memh, i) != 0)
  539                                 goto fail;
  540                 }
  541         }
  543         return (0);
fail:
printf("%s: failed to clear shared memory at offset 0x%x\n",
sc->sc_dev.dv_xname, i);
  548         return (1);
  549 }
  551 /*
  552  * Given a NIC memory source address and a host memory destination address,
  553  * copy 'len' from NIC to host using shared memory.  The 'len' is rounded
  554  * up to a word - ok as long as mbufs are word-sized.
  555  */
  556 __inline void
ec_readmem(struct ec_softc *esc, int from, u_int8_t *to, int len)
  558 {
bus_space_tag_t memt = esc->sc_dp8390.sc_buft;
bus_space_handle_t memh = esc->sc_dp8390.sc_bufh;
  562         if (len & 1)
  563                 ++len;
  565         if (esc->sc_16bitp)
bus_space_read_region_2(memt, memh, from, (u_int16_t *)to,
len >> 1);
  568         else
bus_space_read_region_1(memt, memh, from, to, len);
  570 }
  572 int
ec_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf)
  574 {
  575         struct ec_softc *esc = (struct ec_softc *)sc;
bus_space_tag_t asict = esc->sc_asict;
bus_space_handle_t asich = esc->sc_asich;
bus_space_tag_t memt = esc->sc_dp8390.sc_buft;
bus_space_handle_t memh = esc->sc_dp8390.sc_bufh;
u_int8_t *data, savebyte[2];
  581         int savelen, len, leftover;
  582 #ifdef DIAGNOSTIC
u_int8_t *lim;
  584 #endif
savelen = m->m_pkthdr.len;
  588         /*
  589          * 8-bit boards are simple: we're already in the correct
  590          * page, and no alignment tricks are necessary.
  591          */
  592         if (esc->sc_16bitp == 0) {
  593                 for (; m != NULL; buf += m->m_len, m = m->m_next)
bus_space_write_region_1(memt, memh, buf,
mtod(m, u_int8_t *), m->m_len);
  596                 return (savelen);
  597         }
  599         /*
  600          * If it's a 16-bit board, we have transmit buffers
  601          * in a different page; switch to it.
  602          */
  603         if (esc->sc_16bitp)
bus_space_write_1(asict, asich, ELINK2_GACFR,
ELINK2_GACFR_RSEL);
  607         /* Start out with no leftover data. */
leftover = 0;
savebyte[0] = savebyte[1] = 0;
  611         for (; m != NULL; m = m->m_next) {
len = m->m_len;
  613                 if (len == 0)
  614                         continue;
data = mtod(m, u_int8_t *);
  616 #ifdef DIAGNOSTIC
lim = data + len;
  618 #endif
  619                 while (len > 0) {
  620                         if (leftover) {
  621                                 /*
  622                                  * Data left over (from mbuf or realignment).
  623                                  * Buffer the next byte, and write it and
  624                                  * the leftover data out.
  625                                  */
savebyte[1] = *data++;
len--;
bus_space_write_2(memt, memh, buf,
  629                                     *(u_int16_t *)savebyte);
buf += 2;
leftover = 0;
  632                         } else if (ALIGNED_POINTER(data, u_int16_t) == 0) {
  633                                 /*
  634                                  * Unaligned data; buffer the next byte.
  635                                  */
savebyte[0] = *data++;
len--;
leftover = 1;
  639                         } else {
  640                                 /*
  641                                  * Aligned data; output contiguous words as
  642                                  * much as we can, then buffer the remaining
  643                                  * byte, if any.
  644                                  */
leftover = len & 1;
len &= ~1;
bus_space_write_region_2(memt, memh, buf,
  648                                     (u_int16_t *)data, len >> 1);
data += len;
buf += len;
  651                                 if (leftover)
savebyte[0] = *data++;
len = 0;
  654                         }
  655                 }
  656                 if (len < 0)
panic("ec_write_mbuf: negative len");
  658 #ifdef DIAGNOSTIC
  659                 if (data != lim)
panic("ec_write_mbuf: data != lim");
  661 #endif
  662         }
  663         if (leftover) {
savebyte[1] = 0;
bus_space_write_2(memt, memh, buf, *(u_int16_t *)savebyte);
  666         }
  668         /*
  669          * Switch back to receive page.
  670          */
  671         if (esc->sc_16bitp)
bus_space_write_1(asict, asich, ELINK2_GACFR,
ELINK2_GACFR_RSEL | ELINK2_GACFR_MBS0);
  675         return (savelen);
  676 }
  678 int
ec_ring_copy(struct dp8390_softc *sc, int src, caddr_t dst,
u_short amount)
  681 {
  682         struct ec_softc *esc = (struct ec_softc *)sc;
u_short tmp_amount;
  685         /* Does copy wrap to lower addr in ring buffer? */
  686         if (src + amount > sc->mem_end) {
tmp_amount = sc->mem_end - src;
  689                 /* Copy amount up to end of NIC memory. */
ec_readmem(esc, src, dst, tmp_amount);
amount -= tmp_amount;
src = sc->mem_ring;
dst += tmp_amount;
  695         }
ec_readmem(esc, src, dst, amount);
  699         return (src + amount);
  700 }
  702 void
ec_read_hdr(struct dp8390_softc *sc, int packet_ptr,
  704     struct dp8390_ring *packet_hdrp)
  705 {
  706         struct ec_softc *esc = (struct ec_softc *)sc;
ec_readmem(esc, packet_ptr, (u_int8_t *)packet_hdrp,
  709             sizeof(struct dp8390_ring));
  710 #if BYTE_ORDER == BIG_ENDIAN
packet_hdrp->count = swap16(packet_hdrp->count);
  712 #endif
  713 }
  715 void
ec_media_init(struct dp8390_softc *sc)
  717 {
ifmedia_init(&sc->sc_media, 0, dp8390_mediachange, dp8390_mediastatus);
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_10_2, 0, NULL);
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_10_5, 0, NULL);
ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_10_2);
  722 }
  724 int
ec_mediachange(struct dp8390_softc *sc)
  726 {
  727         struct ec_softc *esc = (struct ec_softc *)sc;
  728         struct ifmedia *ifm = &sc->sc_media;
  730         return (ec_set_media(esc, ifm->ifm_media));
  731 }
  733 void
ec_mediastatus(struct dp8390_softc *sc, struct ifmediareq *ifmr)
  735 {
  736         struct ifmedia *ifm = &sc->sc_media;
  738         /*
  739          * The currently selected media is always the active media.
  740          */
ifmr->ifm_active = ifm->ifm_cur->ifm_media;
  742 }
  744 void
ec_init_card(struct dp8390_softc *sc)
  746 {
  747         struct ec_softc *esc = (struct ec_softc *)sc;
  748         struct ifmedia *ifm = &sc->sc_media;
  750         (void) ec_set_media(esc, ifm->ifm_cur->ifm_media);
  751 }
  753 int
ec_set_media(struct ec_softc *esc, int media)
  755 {
u_int8_t new;
  758         if (IFM_TYPE(media) != IFM_ETHER)
  759                 return (EINVAL);
  761         switch (IFM_SUBTYPE(media)) {
  762         case IFM_10_2:
new = ELINK2_CR_XSEL;
  764                 break;
  766         case IFM_10_5:
new = 0;
  768                 break;
  770         default:
  771                 return (EINVAL);
  772         }
bus_space_write_1(esc->sc_asict, esc->sc_asich, ELINK2_CR, new);
  775         return (0);
  776 }