diff options
Diffstat (limited to 'sys/dev/dec/if_le_dec.c')
| -rw-r--r-- | sys/dev/dec/if_le_dec.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/sys/dev/dec/if_le_dec.c b/sys/dev/dec/if_le_dec.c new file mode 100644 index 00000000000..67e1720f20c --- /dev/null +++ b/sys/dev/dec/if_le_dec.c @@ -0,0 +1,161 @@ +/* $OpenBSD: if_le_dec.c,v 1.1 2002/05/02 22:56:02 miod Exp $ */ +/* $NetBSD: if_le_dec.c,v 1.12 2001/11/13 12:49:45 lukem Exp $ */ + +/*- + * Copyright (c) 1997 Jonathan Stone. All rights reserved. + * Copyright (c) 1995 Charles M. Hannum. All rights reserved. + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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/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_media.h> + +#ifdef INET +#include <netinet/in.h> +#include <netinet/if_ether.h> +#endif + +#include <dev/ic/am7990reg.h> +#include <dev/ic/am7990var.h> + +#include <dev/tc/if_levar.h> +#include <dev/tc/tcvar.h> + +#include <machine/bus.h> + +/* access LANCE registers */ +void le_dec_writereg(volatile u_short *regptr, u_short val); +#define LERDWR(cntl, src, dst) { (dst) = (src); tc_mb(); } +#define LEWREG(src, dst) le_dec_writereg(&(dst), (src)) + +void le_dec_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t); +u_int16_t le_dec_rdcsr(struct am7990_softc *, u_int16_t); + +void +dec_le_common_attach(sc, eap) + struct am7990_softc *sc; + u_char *eap; +{ + int i; + + sc->sc_rdcsr = le_dec_rdcsr; + sc->sc_wrcsr = le_dec_wrcsr; + sc->sc_hwinit = NULL; + + sc->sc_conf3 = 0; + sc->sc_addr = 0; + sc->sc_memsize = 65536; + + /* + * Get the ethernet address out of rom + */ + for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++) { + sc->sc_arpcom.ac_enaddr[i] = *eap; + eap += 4; + } + + am7990_config(sc); +} + +void +le_dec_wrcsr(sc, port, val) + struct am7990_softc *sc; + u_int16_t port, val; +{ + struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1; + + LEWREG(port, ler1->ler1_rap); + LERDWR(port, val, ler1->ler1_rdp); +} + +u_int16_t +le_dec_rdcsr(sc, port) + struct am7990_softc *sc; + u_int16_t port; +{ + struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1; + u_int16_t val; + + LEWREG(port, ler1->ler1_rap); + LERDWR(0, ler1->ler1_rdp, val); + return (val); +} + +/* + * Write a lance register port, reading it back to ensure success. This seems + * to be necessary during initialization, since the chip appears to be a bit + * pokey sometimes. + */ +void +le_dec_writereg(regptr, val) + register volatile u_short *regptr; + register u_short val; +{ + register int i = 0; + + while (*regptr != val) { + *regptr = val; + tc_mb(); + if (++i > 10000) { + printf("le: Reg did not settle (to x%x): x%x\n", val, + *regptr); + return; + } + DELAY(100); + } +} + +/* + * Routines for accessing the transmit and receive buffers are provided + * by am7990.c, because of the LE_NEED_BUF_* macros defined above. + * Unfortunately, CPU addressing of these buffers is done in one of + * 3 ways: + * - contiguous (for the 3max and turbochannel option card) + * - gap2, which means shorts (2 bytes) interspersed with short (2 byte) + * spaces (for the pmax, vax 3400, and ioasic LANCE descriptors) + * - gap16, which means 16bytes interspersed with 16byte spaces + * for buffers which must begin on a 32byte boundary (for 3min, maxine, + * and alpha) + * The buffer offset is the logical byte offset, assuming contiguous storage. + */ |