/* $NetBSD: asc_vsbus.c,v 1.11 2000/04/23 16:38:54 matt Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum. * * 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 "opt_vax46.h" #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: asc_vsbus.c,v 1.11 2000/04/23 16:38:54 matt Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* for SCSI ctlr ID# XXX */ struct asc_vsbus_softc { struct ncr53c9x_softc sc_ncr53c9x; /* Must be first */ bus_space_tag_t sc_bst; /* bus space tag */ bus_space_handle_t sc_bsh; /* bus space handle */ bus_space_handle_t sc_dirh; /* scsi direction handle */ bus_space_handle_t sc_adrh; /* scsi address handle */ bus_space_handle_t sc_ncrh; /* ncr bus space handle */ bus_dma_tag_t sc_dmat; /* bus dma tag */ bus_dmamap_t sc_dmamap; caddr_t *sc_dmaaddr; size_t *sc_dmalen; size_t sc_dmasize; unsigned int sc_flags; #define ASC_FROMMEMORY 0x0001 /* Must be 1 */ #define ASC_DMAACTIVE 0x0002 #define ASC_MAPLOADED 0x0004 unsigned long sc_xfers; }; #define ASC_REG_KA46_ADR 0x0000 #define ASC_REG_KA46_DIR 0x000C #define ASC_REG_KA49_ADR 0x0004 #define ASC_REG_KA49_DIR 0x0008 #define ASC_REG_NCR 0x0080 #define ASC_REG_END 0x00B0 #define ASC_MAXXFERSIZE 65536 #define ASC_FREQUENCY 25000000 static int asc_vsbus_match __P((struct device *, struct cfdata *, void *)); static void asc_vsbus_attach __P((struct device *, struct device *, void *)); struct cfattach asc_vsbus_ca = { sizeof(struct asc_vsbus_softc), asc_vsbus_match, asc_vsbus_attach }; static struct scsipi_device asc_vsbus_dev = { NULL, /* Use the default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* use the default done handler */ }; /* * Functions and the switch for the MI code */ static u_char asc_vsbus_read_reg __P((struct ncr53c9x_softc *, int)); static void asc_vsbus_write_reg __P((struct ncr53c9x_softc *, int, u_char)); static int asc_vsbus_dma_isintr __P((struct ncr53c9x_softc *)); static void asc_vsbus_dma_reset __P((struct ncr53c9x_softc *)); static int asc_vsbus_dma_intr __P((struct ncr53c9x_softc *)); static int asc_vsbus_dma_setup __P((struct ncr53c9x_softc *, caddr_t *, size_t *, int, size_t *)); static void asc_vsbus_dma_go __P((struct ncr53c9x_softc *)); static void asc_vsbus_dma_stop __P((struct ncr53c9x_softc *)); static int asc_vsbus_dma_isactive __P((struct ncr53c9x_softc *)); static struct ncr53c9x_glue asc_vsbus_glue = { asc_vsbus_read_reg, asc_vsbus_write_reg, asc_vsbus_dma_isintr, asc_vsbus_dma_reset, asc_vsbus_dma_intr, asc_vsbus_dma_setup, asc_vsbus_dma_go, asc_vsbus_dma_stop, asc_vsbus_dma_isactive, NULL, }; static int asc_vsbus_match( struct device *parent, struct cfdata *cf, void *aux) { struct vsbus_attach_args *va = aux; int dummy; volatile u_int8_t *ncr_regs; if (vax_boardtype != VAX_BTYP_46 && vax_boardtype != VAX_BTYP_48 && vax_boardtype != VAX_BTYP_49) return 0; ncr_regs = (volatile u_int8_t *) va->va_addr; /* *** need to generate an interrupt here * From trial and error, I've determined that an INT is generated * only when the following sequence of events occurs: * 1) The interrupt status register (0x05) must be read. * 2) SCSI bus reset interrupt must be enabled * 3) SCSI bus reset command must be sent * 4) NOP command must be sent */ dummy = ncr_regs[NCR_INTR << 2] & 0xFF; ncr_regs[NCR_CFG1 << 2] = 0x06; /* we're ID 6, turn on INT for SCSI reset */ ncr_regs[NCR_CMD << 2] = NCRCMD_RSTSCSI; /* send the reset */ ncr_regs[NCR_CMD << 2] = NCRCMD_NOP; /* send a NOP */ DELAY(10000); dummy = ncr_regs[NCR_INTR << 2] & 0xFF; return (dummy & NCRINTR_SBR) != 0; } /* * Attach this instance, and then all the sub-devices */ static void asc_vsbus_attach(struct device *parent, struct device *self, void *aux) { struct vsbus_attach_args *va = aux; struct asc_vsbus_softc *asc = (void *)self; struct ncr53c9x_softc *sc = &asc->sc_ncr53c9x; int error; /* * Set up glue for MI code early; we use some of it here. */ sc->sc_glue = &asc_vsbus_glue; asc->sc_bst = va->va_iot; asc->sc_dmat = va->va_dmat; error = bus_space_map(asc->sc_bst, va->va_paddr - ASC_REG_NCR, ASC_REG_END, 0, &asc->sc_bsh); if (error) { printf(": failed to map registers: error=%d\n", error); return; } error = bus_space_subregion(asc->sc_bst, asc->sc_bsh, ASC_REG_NCR, ASC_REG_END - ASC_REG_NCR, &asc->sc_ncrh); if (error) { printf(": failed to map ncr registers: error=%d\n", error); return; } if (vax_boardtype == VAX_BTYP_46 || vax_boardtype == VAX_BTYP_48) { error = bus_space_subregion(asc->sc_bst, asc->sc_bsh, ASC_REG_KA46_ADR, sizeof(u_int32_t), &asc->sc_adrh); if (error) { printf(": failed to map adr register: error=%d\n", error); return; } error = bus_space_subregion(asc->sc_bst, asc->sc_bsh, ASC_REG_KA46_DIR, sizeof(u_int32_t), &asc->sc_dirh); if (error) { printf(": failed to map dir register: error=%d\n", error); return; } } else { /* This is a gross and disgusting kludge but it'll * save a bunch of ugly code. Unlike the VS4000/60, * the SCSI Address and direction registers are not * near the SCSI NCR registers and are inside the * block of general VAXstation registers. So we grab * them from there and knowing the internals of the * bus_space implementation, we cast to bus_space_handles. */ struct vsbus_softc *vsc = (struct vsbus_softc *) parent; asc->sc_adrh = (bus_space_handle_t) (vsc->sc_vsregs + ASC_REG_KA49_ADR); asc->sc_dirh = (bus_space_handle_t) (vsc->sc_vsregs + ASC_REG_KA49_DIR); } error = bus_dmamap_create(asc->sc_dmat, ASC_MAXXFERSIZE, 1, ASC_MAXXFERSIZE, 0, BUS_DMA_NOWAIT, &asc->sc_dmamap); switch (vax_boardtype) { #if defined(VAX46) case VAX_BTYP_46: sc->sc_id = (clk_page[0xbc/2] >> clk_tweak) & 7; break; #endif default: sc->sc_id = 6; /* XXX need to get this from VMB */ break; } sc->sc_freq = ASC_FREQUENCY; /* gimme Mhz */ sc->sc_freq /= 1000000; scb_vecalloc(va->va_cvec, (void (*)(void *)) ncr53c9x_intr, &asc->sc_ncr53c9x, SCB_ISTACK); /* * XXX More of this should be in ncr53c9x_attach(), but * XXX should we really poke around the chip that much in * XXX the MI code? Think about this more... */ /* * Set up static configuration info. */ sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB; sc->sc_cfg2 = NCRCFG2_SCSI2; sc->sc_cfg3 = 0; sc->sc_rev = NCR_VARIANT_NCR53C94; /* * XXX minsync and maxxfer _should_ be set up in MI code, * XXX but it appears to have some dependency on what sort * XXX of DMA we're hooked up to, etc. */ /* * This is the value used to start sync negotiations * Note that the NCR register "SYNCTP" is programmed * in "clocks per byte", and has a minimum value of 4. * The SCSI period used in negotiation is one-fourth * of the time (in nanoseconds) needed to transfer one byte. * Since the chip's clock is given in MHz, we have the following * formula: 4 * period = (1000 / freq) * 4 */ sc->sc_minsync = (1000 / sc->sc_freq); sc->sc_maxxfer = 63 * 1024; printf("\n%s", self->dv_xname); /* Pretty print */ /* Do the common parts of attachment. */ sc->sc_adapter.scsipi_cmd = ncr53c9x_scsi_cmd; sc->sc_adapter.scsipi_minphys = minphys; ncr53c9x_attach(sc, &asc_vsbus_dev); } /* * Glue functions. */ static u_char asc_vsbus_read_reg(struct ncr53c9x_softc *sc, int reg) { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; return bus_space_read_1(asc->sc_bst, asc->sc_ncrh, reg * sizeof(u_int32_t)); } static void asc_vsbus_write_reg(sc, reg, val) struct ncr53c9x_softc *sc; int reg; u_char val; { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; bus_space_write_1(asc->sc_bst, asc->sc_ncrh, reg * sizeof(u_int32_t), val); } static int asc_vsbus_dma_isintr(sc) struct ncr53c9x_softc *sc; { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; return bus_space_read_1(asc->sc_bst, asc->sc_ncrh, NCR_STAT * sizeof(u_int32_t)) & NCRSTAT_INT; } static void asc_vsbus_dma_reset(sc) struct ncr53c9x_softc *sc; { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; if (asc->sc_flags & ASC_MAPLOADED) bus_dmamap_unload(asc->sc_dmat, asc->sc_dmamap); asc->sc_flags &= ~(ASC_DMAACTIVE|ASC_MAPLOADED); } static int asc_vsbus_dma_intr(sc) struct ncr53c9x_softc *sc; { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; u_int tcl, tcm; int trans, resid; if ((asc->sc_flags & ASC_DMAACTIVE) == 0) panic("asc_vsbus_dma_intr: DMA wasn't active"); asc->sc_flags &= ~ASC_DMAACTIVE; if (asc->sc_dmasize == 0) { /* A "Transfer Pad" operation completed */ tcl = NCR_READ_REG(sc, NCR_TCL); tcm = NCR_READ_REG(sc, NCR_TCM); NCR_DMA(("asc_vsbus_intr: discarded %d bytes (tcl=%d, tcm=%d)\n", tcl | (tcm << 8), tcl, tcm)); return 0; } resid = 0; if ((resid = (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF)) != 0) { NCR_DMA(("asc_vsbus_intr: empty FIFO of %d ", resid)); DELAY(1); } if (asc->sc_flags & ASC_MAPLOADED) { bus_dmamap_sync(asc->sc_dmat, asc->sc_dmamap, 0, asc->sc_dmasize, asc->sc_flags & ASC_FROMMEMORY ? BUS_DMASYNC_POSTWRITE : BUS_DMASYNC_POSTREAD); bus_dmamap_unload(asc->sc_dmat, asc->sc_dmamap); } asc->sc_flags &= ~ASC_MAPLOADED; resid += (tcl = NCR_READ_REG(sc, NCR_TCL)); resid += (tcm = NCR_READ_REG(sc, NCR_TCM)) << 8; trans = asc->sc_dmasize - resid; if (trans < 0) { /* transferred < 0 ? */ printf("asc_vsbus_intr: xfer (%d) > req (%d)\n", trans, asc->sc_dmasize); trans = asc->sc_dmasize; } NCR_DMA(("asc_vsbus_intr: tcl=%d, tcm=%d; trans=%d, resid=%d\n", tcl, tcm, trans, resid)); *asc->sc_dmalen -= trans; *asc->sc_dmaaddr += trans; asc->sc_xfers++; return 0; } static int asc_vsbus_dma_setup(struct ncr53c9x_softc *sc, caddr_t *addr, size_t *len, int datain, size_t *dmasize) { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; asc->sc_dmaaddr = addr; asc->sc_dmalen = len; if (datain) { asc->sc_flags &= ~ASC_FROMMEMORY; } else { asc->sc_flags |= ASC_FROMMEMORY; } if ((vaddr_t) *asc->sc_dmaaddr < VM_MIN_KERNEL_ADDRESS) panic("asc_vsbus_dma_setup: dma address (%p) outside of kernel", *asc->sc_dmaaddr); NCR_DMA(("%s: start %d@%p,%d\n", sc->sc_dev.dv_xname, (int)*asc->sc_dmalen, *asc->sc_dmaaddr, (asc->sc_flags & ASC_FROMMEMORY))); *dmasize = asc->sc_dmasize = min(*dmasize, ASC_MAXXFERSIZE); if (asc->sc_dmasize) { if (bus_dmamap_load(asc->sc_dmat, asc->sc_dmamap, *asc->sc_dmaaddr, asc->sc_dmasize, NULL /* kernel address */, BUS_DMA_NOWAIT|VAX_BUS_DMA_SPILLPAGE)) panic("%s: cannot load dma map", sc->sc_dev.dv_xname); bus_dmamap_sync(asc->sc_dmat, asc->sc_dmamap, 0, asc->sc_dmasize, asc->sc_flags & ASC_FROMMEMORY ? BUS_DMASYNC_PREWRITE : BUS_DMASYNC_PREREAD); bus_space_write_4(asc->sc_bst, asc->sc_adrh, 0, asc->sc_dmamap->dm_segs[0].ds_addr); bus_space_write_4(asc->sc_bst, asc->sc_dirh, 0, asc->sc_flags & ASC_FROMMEMORY); asc->sc_flags |= ASC_MAPLOADED; } return 0; } static void asc_vsbus_dma_go(struct ncr53c9x_softc *sc) { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; asc->sc_flags |= ASC_DMAACTIVE; } static void asc_vsbus_dma_stop(struct ncr53c9x_softc *sc) { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; if (asc->sc_flags & ASC_MAPLOADED) { bus_dmamap_sync(asc->sc_dmat, asc->sc_dmamap, 0, asc->sc_dmasize, asc->sc_flags & ASC_FROMMEMORY ? BUS_DMASYNC_POSTWRITE : BUS_DMASYNC_POSTREAD); bus_dmamap_unload(asc->sc_dmat, asc->sc_dmamap); } asc->sc_flags &= ~(ASC_DMAACTIVE|ASC_MAPLOADED); } static int asc_vsbus_dma_isactive(struct ncr53c9x_softc *sc) { struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; return (asc->sc_flags & ASC_DMAACTIVE) != 0; }