/* $NetBSD: sc_mbmem.c,v 1.2 2001/06/27 17:37:04 fredette Exp $ */ /*- * Copyright (c) 1996 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Adam Glass, David Jones, Gordon W. Ross, and Matthew Fredette. * * 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. */ /* * This file contains only the machine-dependent parts of the * Sun-2 SCSI driver. (Autoconfig stuff and DMA functions.) * The machine-independent parts are in sunscpal.c * * Supported hardware includes: * Sun SCSI-2 on Multibus (Sun2/120,Sun2/170) * Sun SCSI-2 on VME (Sun2/50,Sun3/160,Sun3/260,others?) * * Credits, history: * * Matthew Fredette took revision 1.15 of si_vme.c, and then heavily * modified it to support the Sun sc. The remaining credits * are from si_vme.c: * * David Jones wrote the initial version of this module, which * included support for the VME adapter only. (no reselection). * * Gordon Ross added support for the OBIO adapter, and re-worked * both the VME and OBIO code to support disconnect/reselect. * (Required figuring out the hardware "features" noted above.) * * The autoconfiguration boilerplate came from Adam Glass. */ /***************************************************************** * Multibus functions for sc ****************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* #define DEBUG XXX */ #include #include /* Yes, we use a VME header file. */ #include /* * Transfers smaller than this are done using PIO * (on assumption they're not worth DMA overhead) */ #define MIN_DMA_LEN 128 /* * New-style autoconfig attachment */ static int sunsc_mbmem_match __P((struct device *, struct cfdata *, void *)); static void sunsc_mbmem_attach __P((struct device *, struct device *, void *)); static int sunsc_mbmem_intr __P((void *)); struct cfattach sc_mbmem_ca = { sizeof(struct sunscpal_softc), sunsc_mbmem_match, sunsc_mbmem_attach }; /* * Options for parity, DMA, and interrupts. */ int sunsc_mbmem_options = 0x00; static int sunsc_mbmem_match(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct mbmem_attach_args *mbma = aux; bus_space_handle_t bh; int matched; /* No default Multibus address. */ if (mbma->mbma_paddr == -1) return (0); /* Make sure there is something there... */ if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 0, &bh)) return (0); matched = (bus_space_peek_2(mbma->mbma_bustag, bh, SCREG_ICR, NULL) == 0); bus_space_unmap(mbma->mbma_bustag, bh, SCREG_BANK_SZ); if (!matched) return (0); /* Default interrupt priority. */ if (mbma->mbma_pri == -1) mbma->mbma_pri = 2; return (1); } static void sunsc_mbmem_attach(parent, self, args) struct device *parent, *self; void *args; { struct sunscpal_softc *sc = (void *) self; struct cfdata *cf = self->dv_cfdata; struct mbmem_attach_args *mbma = args; int i; /* Map in the device. */ sc->sunscpal_regt = mbma->mbma_bustag; sc->sunscpal_dmat = mbma->mbma_dmatag; if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 0, &sc->sunscpal_regh)) panic("sunsc_mbmem_attach: can't map"); /* Device register offsets. */ sc->sunscpal_data = SCREG_DATA; sc->sunscpal_cmd_stat = SCREG_CMD_STAT; sc->sunscpal_icr = SCREG_ICR; sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; sc->sunscpal_dma_count = SCREG_DMA_COUNT; sc->sunscpal_intvec = SCREG_INTVEC; /* Allocate DMA handles. */ i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); sc->sc_dma_handles = (sunscpal_dma_handle_t) malloc(i, M_DEVBUF, M_WAITOK); if (sc->sc_dma_handles == NULL) panic("sc: dma handles malloc failed\n"); for (i = 0; i < SUNSCPAL_OPENINGS; i++) if (bus_dmamap_create(sc->sunscpal_dmat, SUNSCPAL_MAX_DMA_LEN, 1, SUNSCPAL_MAX_DMA_LEN, 0, BUS_DMA_WAITOK, &sc->sc_dma_handles[i]. dh_dmamap) != 0) panic("sc: dma map create failed\n"); /* Miscellaneous. */ sc->sc_min_dma_len = MIN_DMA_LEN; sc->sc_rev = SUNSCPAL_VARIANT_501_1006; /* Attach interrupt handler. */ bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_BIO, 0, sunsc_mbmem_intr, sc); /* Do the common attach stuff. */ sunscpal_attach(sc, (cf->cf_flags ? cf->cf_flags : sunsc_mbmem_options)); } static int sunsc_mbmem_intr(void *arg) { struct sunscpal_softc *sc = arg; int claimed; claimed = sunscpal_intr(sc); #ifdef DEBUG if (!claimed) { printf("sunsc_intr: spurious from SBC\n"); } #endif /* Yes, we DID cause this interrupt. */ claimed = 1; return (claimed); }