/* $NetBSD: am79c930.c,v 1.2 1999/11/05 05:13:36 sommerfeld Exp $ */ /* $OpenBSD: am79c930.c,v 1.1 1999/12/16 02:56:56 deraadt Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Bill Sommerfeld * * 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 NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 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. */ /* * Am79c930 chip driver. * * This is used by the awi driver to use the shared * memory attached to the 79c930 to communicate with the firmware running * in the 930's on-board 80188 core. * * The 79c930 can be mapped into just I/O space, or also have a * memory mapping; the mapping must be set up by the bus front-end * before am79c930_init is called. */ /* * operations: * * read_8, read_16, read_32, read_64, read_bytes * write_8, write_16, write_32, write_64, write_bytes * (two versions, depending on whether memory-space or i/o space is in use). * * interrupt E.C. * start isr * end isr */ #include #include #include #include #include #include #include #include #include #define AM930_DELAY(x) /*nothing*/; void am79c930_regdump __P((struct am79c930_softc *sc)); static void io_write_1 __P((struct am79c930_softc *, u_int32_t, u_int8_t)); static void io_write_2 __P((struct am79c930_softc *, u_int32_t, u_int16_t)); static void io_write_4 __P((struct am79c930_softc *, u_int32_t, u_int32_t)); static void io_write_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); static u_int8_t io_read_1 __P((struct am79c930_softc *, u_int32_t)); static u_int16_t io_read_2 __P((struct am79c930_softc *, u_int32_t)); static u_int32_t io_read_4 __P((struct am79c930_softc *, u_int32_t)); static void io_read_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); static void mem_write_1 __P((struct am79c930_softc *, u_int32_t, u_int8_t)); static void mem_write_2 __P((struct am79c930_softc *, u_int32_t, u_int16_t)); static void mem_write_4 __P((struct am79c930_softc *, u_int32_t, u_int32_t)); static void mem_write_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); static u_int8_t mem_read_1 __P((struct am79c930_softc *, u_int32_t)); static u_int16_t mem_read_2 __P((struct am79c930_softc *, u_int32_t)); static u_int32_t mem_read_4 __P((struct am79c930_softc *, u_int32_t)); static void mem_read_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); static struct am79c930_ops iospace_ops = { io_write_1, io_write_2, io_write_4, io_write_bytes, io_read_1, io_read_2, io_read_4, io_read_bytes }; struct am79c930_ops memspace_ops = { mem_write_1, mem_write_2, mem_write_4, mem_write_bytes, mem_read_1, mem_read_2, mem_read_4, mem_read_bytes }; static void io_write_1 (sc, off, val) struct am79c930_softc *sc; u_int32_t off; u_int8_t val; { /* XXX bank-switching? */ AM930_DELAY(1); bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, ((off>>8)& 0x7f)); AM930_DELAY(1); bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); AM930_DELAY(1); bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val); AM930_DELAY(1); } static void io_write_2 (sc, off, val) struct am79c930_softc *sc; u_int32_t off; u_int16_t val; { io_write_1(sc, off, val & 0xff); io_write_1(sc, off+1, (val >> 8) & 0xff); } static void io_write_4 (sc, off, val) struct am79c930_softc *sc; u_int32_t off; u_int32_t val; { /* XXX higher offset values needed for bank-switching! */ io_write_1(sc, off, val & 0xff); io_write_1(sc, off+1, (val >> 8) & 0xff); io_write_1(sc, off+2, (val >> 16) & 0xff); io_write_1(sc, off+3, (val >> 24) & 0xff); } static void io_write_bytes (sc, off, ptr, len) struct am79c930_softc *sc; u_int32_t off; u_int8_t *ptr; size_t len; { int i; /* XXX higher offset values needed for bank-switching! */ for (i=0; isc_iot, sc->sc_ioh, AM79C930_LMA_HI, ((off>>8)& 0x7f)); AM930_DELAY(1); bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); AM930_DELAY(1); val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); AM930_DELAY(1); return val; } static u_int16_t io_read_2 (sc, off) struct am79c930_softc *sc; u_int32_t off; { return io_read_1 (sc, off) | (io_read_1 (sc, off+1) << 8); } static u_int32_t io_read_4 (sc, off) struct am79c930_softc *sc; u_int32_t off; { /* XXX bank-switching? */ return io_read_1 (sc, off) | (io_read_1 (sc, off+1) << 8) | (io_read_1 (sc, off+2) << 16) | (io_read_1 (sc, off+3) << 24); } static void io_read_bytes (sc, off, ptr, len) struct am79c930_softc *sc; u_int32_t off; u_int8_t *ptr; size_t len; { int i; for (i=0; isc_memt, sc->sc_memh, off, val); } static void mem_write_2 (sc, off, val) struct am79c930_softc *sc; u_int32_t off; u_int16_t val; { /* XXX higher offset values needed for bank-switching! */ bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val & 0xff); bus_space_write_1(sc->sc_memt, sc->sc_memh, off+1, (val >> 8) & 0xff); } static void mem_write_4 (sc, off, val) struct am79c930_softc *sc; u_int32_t off; u_int32_t val; { /* XXX higher offset values needed for bank-switching! */ bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val & 0xff); bus_space_write_1(sc->sc_memt, sc->sc_memh, off+1, (val >> 8) & 0xff); bus_space_write_1(sc->sc_memt, sc->sc_memh, off+2, (val >> 16) & 0xff); bus_space_write_1(sc->sc_memt, sc->sc_memh, off+3, (val >> 24) & 0xff); } static void mem_write_bytes (sc, off, ptr, len) struct am79c930_softc *sc; u_int32_t off; u_int8_t *ptr; size_t len; { int i; /* XXX higher offset values needed for bank-switching! */ for (i=0; isc_memt, sc->sc_memh, off+i, ptr[i]); } static u_int8_t mem_read_1 (sc, off) struct am79c930_softc *sc; u_int32_t off; { /* XXX higher offset values needed for bank-switching! */ return bus_space_read_1(sc->sc_memt, sc->sc_memh, off); } static u_int16_t mem_read_2 (sc, off) struct am79c930_softc *sc; u_int32_t off; { /* XXX higher offset values needed for bank-switching! */ return bus_space_read_1(sc->sc_memt, sc->sc_memh, off) | (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) <<8); } static u_int32_t mem_read_4 (sc, off) struct am79c930_softc *sc; u_int32_t off; { /* XXX higher offset values needed for bank-switching! */ return bus_space_read_1(sc->sc_memt, sc->sc_memh, off) | (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) <<8)| (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) | (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24); } static void mem_read_bytes (sc, off, ptr, len) struct am79c930_softc *sc; u_int32_t off; u_int8_t *ptr; size_t len; { int i; /* XXX higher offset values needed for bank-switching! */ for (i=0; isc_memt, sc->sc_memh, off+i); } /* * Set bits in GCR. */ void am79c930_gcr_setbits (sc, bits) struct am79c930_softc *sc; u_int8_t bits; { u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); gcr |= bits; bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); } /* * Clear bits in GCR. */ void am79c930_gcr_clearbits (sc, bits) struct am79c930_softc *sc; u_int8_t bits; { u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); gcr &= ~bits; bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); } u_int8_t am79c930_gcr_read (sc) struct am79c930_softc *sc; { return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); } #if 0 void am79c930_regdump (sc) struct am79c930_softc *sc; { u_int8_t buf[8]; int i; AM930_DELAY(5); for (i=0; i<8; i++) { buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i); AM930_DELAY(5); } printf("am79c930: regdump:"); for (i=0; i<8; i++) { printf(" %02x", buf[i]); } printf("\n"); } #endif void am79c930_chip_init (sc, how) struct am79c930_softc *sc; { /* zero the bank select register, and leave it that way.. */ bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0); if (how) sc->sc_ops = &memspace_ops; else sc->sc_ops = &iospace_ops; }