/* $NetBSD: sc_mbmem.c,v 1.14 2009/11/21 04:16:52 rmind 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. * * 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 __KERNEL_RCSID(0, "$NetBSD: sc_mbmem.c,v 1.14 2009/11/21 04:16:52 rmind Exp $"); #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(device_t, cfdata_t, void *); static void sunsc_mbmem_attach(device_t, device_t, void *); static int sunsc_mbmem_intr(void *); CFATTACH_DECL_NEW(sc_mbmem, sizeof(struct sunscpal_softc), sunsc_mbmem_match, sunsc_mbmem_attach, NULL, NULL); /* * Options for parity, DMA, and interrupts. */ int sunsc_mbmem_options = 0x00; static int sunsc_mbmem_match(device_t parent, cfdata_t cf, void *aux) { struct mbmem_attach_args *mbma = aux; bus_space_handle_t bh; bool 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(device_t parent, device_t self, void *args) { struct sunscpal_softc *sc = device_private(self); struct cfdata *cf = device_cfdata(self); struct mbmem_attach_args *mbma = args; int i; sc->sc_dev = self; /* 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("%s: can't map", __func__); /* 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 = malloc(i, M_DEVBUF, M_WAITOK); if (sc->sc_dma_handles == NULL) panic("sc: DMA handles malloc failed"); 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"); /* 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 == 0) { printf("%s: spurious from SBC\n", __func__); } #endif /* Yes, we DID cause this interrupt. */ claimed = 1; return claimed; }