/* $NetBSD: wdsc.c,v 1.28 2004/03/28 15:35:33 scw Exp $ */ /* * Copyright (c) 1982, 1990 The Regents of the University of California. * All rights reserved. * * 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. 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. * * @(#)wdsc.c */ /*- * Copyright (c) 1996-2004 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Steve C. Woodford. * * 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. */ #include __KERNEL_RCSID(0, "$NetBSD: wdsc.c,v 1.28 2004/03/28 15:35:33 scw Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void wdsc_pcc_attach __P((struct device *, struct device *, void *)); int wdsc_pcc_match __P((struct device *, struct cfdata *, void *)); CFATTACH_DECL(wdsc_pcc, sizeof(struct sbic_softc), wdsc_pcc_match, wdsc_pcc_attach, NULL, NULL); extern struct cfdriver wdsc_cd; void wdsc_enintr __P((struct sbic_softc *)); int wdsc_dmago __P((struct sbic_softc *, char *, int, int)); int wdsc_dmanext __P((struct sbic_softc *)); void wdsc_dmastop __P((struct sbic_softc *)); int wdsc_dmaintr __P((void *)); int wdsc_scsiintr __P((void *)); /* * Match for SCSI devices on the onboard WD33C93 chip */ int wdsc_pcc_match(pdp, cf, auxp) struct device *pdp; struct cfdata *cf; void *auxp; { struct pcc_attach_args *pa = auxp; if (strcmp(pa->pa_name, wdsc_cd.cd_name)) return (0); pa->pa_ipl = cf->pcccf_ipl; return (1); } /* * Attach the wdsc driver */ void wdsc_pcc_attach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { struct sbic_softc *sc; struct pcc_attach_args *pa; bus_space_handle_t bush; static struct evcnt evcnt; /* XXXSCW: Temporary hack */ sc = (struct sbic_softc *)dp; pa = auxp; bus_space_map(pa->pa_bust, pa->pa_offset, 0x20, 0, &bush); /* * XXXSCW: We *need* an MI, bus_spaced WD33C93 driver... */ sc->sc_sbicp = (sbic_regmap_p) bush; sc->sc_driver = (void *) &evcnt; sc->sc_enintr = wdsc_enintr; sc->sc_dmago = wdsc_dmago; sc->sc_dmanext = wdsc_dmanext; sc->sc_dmastop = wdsc_dmastop; sc->sc_dmacmd = 0; sc->sc_adapter.adapt_dev = &sc->sc_dev; sc->sc_adapter.adapt_nchannels = 1; sc->sc_adapter.adapt_openings = 7; sc->sc_adapter.adapt_max_periph = 1; sc->sc_adapter.adapt_ioctl = NULL; sc->sc_adapter.adapt_minphys = sbic_minphys; sc->sc_adapter.adapt_request = sbic_scsi_request; sc->sc_channel.chan_adapter = &sc->sc_adapter; sc->sc_channel.chan_bustype = &scsi_bustype; sc->sc_channel.chan_channel = 0; sc->sc_channel.chan_ntargets = 8; sc->sc_channel.chan_nluns = 8; sc->sc_channel.chan_id = 7; printf(": WD33C93 SCSI, target %d\n", sc->sc_channel.chan_id); /* * Everything is a valid DMA address. */ sc->sc_dmamask = 0; /* * The onboard WD33C93 of the '147 is usually clocked at 10MHz... * (We use 10 times this for accuracy in later calculations) */ sc->sc_clkfreq = 100; /* * Initialise the hardware */ sbicinit(sc); /* * Fix up the interrupts */ sc->sc_ipl = pa->pa_ipl & PCC_IMASK; pcc_reg_write(sys_pcc, PCCREG_SCSI_INTR_CTRL, PCC_ICLEAR); pcc_reg_write(sys_pcc, PCCREG_DMA_INTR_CTRL, PCC_ICLEAR); pcc_reg_write(sys_pcc, PCCREG_DMA_CONTROL, 0); evcnt_attach_dynamic(&evcnt, EVCNT_TYPE_INTR, pccintr_evcnt(sc->sc_ipl), "disk", sc->sc_dev.dv_xname); pccintr_establish(PCCV_DMA, wdsc_dmaintr, sc->sc_ipl, sc, &evcnt); pccintr_establish(PCCV_SCSI, wdsc_scsiintr, sc->sc_ipl, sc, &evcnt); pcc_reg_write(sys_pcc, PCCREG_SCSI_INTR_CTRL, sc->sc_ipl | PCC_IENABLE | PCC_ICLEAR); (void)config_found(dp, &sc->sc_channel, scsiprint); } /* * Enable DMA interrupts */ void wdsc_enintr(dev) struct sbic_softc *dev; { dev->sc_flags |= SBICF_INTR; pcc_reg_write(sys_pcc, PCCREG_DMA_INTR_CTRL, dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR); } /* * Prime the hardware for a DMA transfer */ int wdsc_dmago(dev, addr, count, flags) struct sbic_softc *dev; char *addr; int count, flags; { /* * Set up the command word based on flags */ if ( (flags & DMAGO_READ) == 0 ) dev->sc_dmacmd = DMAC_CSR_ENABLE | DMAC_CSR_WRITE; else dev->sc_dmacmd = DMAC_CSR_ENABLE; dev->sc_flags |= SBICF_INTR; dev->sc_tcnt = dev->sc_cur->dc_count << 1; /* * Prime the hardware. * Note, it's probably not necessary to do this here, since dmanext * is called just prior to the actual transfer. */ pcc_reg_write(sys_pcc, PCCREG_DMA_CONTROL, 0); pcc_reg_write(sys_pcc, PCCREG_DMA_INTR_CTRL, dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR); pcc_reg_write32(sys_pcc, PCCREG_DMA_DATA_ADDR, (u_int32_t) dev->sc_cur->dc_addr); pcc_reg_write32(sys_pcc, PCCREG_DMA_BYTE_COUNT, (u_int32_t) dev->sc_tcnt | (1 << 24)); pcc_reg_write(sys_pcc, PCCREG_DMA_CONTROL, dev->sc_dmacmd); return(dev->sc_tcnt); } /* * Prime the hardware for the next DMA transfer */ int wdsc_dmanext(dev) struct sbic_softc *dev; { if ( dev->sc_cur > dev->sc_last ) { /* * Shouldn't happen !! */ printf("wdsc_dmanext at end !!!\n"); wdsc_dmastop(dev); return(0); } dev->sc_tcnt = dev->sc_cur->dc_count << 1; /* * Load the next DMA address */ pcc_reg_write(sys_pcc, PCCREG_DMA_CONTROL, 0); pcc_reg_write(sys_pcc, PCCREG_DMA_INTR_CTRL, dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR); pcc_reg_write32(sys_pcc, PCCREG_DMA_DATA_ADDR, (u_int32_t) dev->sc_cur->dc_addr); pcc_reg_write32(sys_pcc, PCCREG_DMA_BYTE_COUNT, (u_int32_t) dev->sc_tcnt | (1 << 24)); pcc_reg_write(sys_pcc, PCCREG_DMA_CONTROL, dev->sc_dmacmd); return(dev->sc_tcnt); } /* * Stop DMA, and disable interrupts */ void wdsc_dmastop(dev) struct sbic_softc *dev; { int s; s = splbio(); pcc_reg_write(sys_pcc, PCCREG_DMA_CONTROL, 0); pcc_reg_write(sys_pcc, PCCREG_DMA_INTR_CTRL, dev->sc_ipl | PCC_ICLEAR); splx(s); } /* * Come here following a DMA interrupt */ int wdsc_dmaintr(arg) void *arg; { struct sbic_softc *dev = arg; int found = 0; /* * Really a DMA interrupt? */ if ( (pcc_reg_read(sys_pcc, PCCREG_DMA_INTR_CTRL) & 0x80) == 0 ) return(0); /* * Was it a completion interrupt? * XXXSCW Note: Support for other DMA interrupts is required, eg. buserr */ if ( pcc_reg_read(sys_pcc, PCCREG_DMA_CONTROL) & DMAC_CSR_DONE ) { ++found; pcc_reg_write(sys_pcc, PCCREG_DMA_INTR_CTRL, dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR); } return(found); } /* * Come here for SCSI interrupts */ int wdsc_scsiintr(arg) void *arg; { struct sbic_softc *dev = arg; int found; /* * Really a SCSI interrupt? */ if ( (pcc_reg_read(sys_pcc, PCCREG_SCSI_INTR_CTRL) & 0x80) == 0 ) return(0); /* * Go handle it */ found = sbicintr(dev); /* * Acknowledge and clear the interrupt */ pcc_reg_write(sys_pcc, PCCREG_SCSI_INTR_CTRL, dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR); return(found); }