/* $NetBSD: esp.c,v 1.70 1997/10/05 18:24:35 thorpej Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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. */ /* * Copyright (c) 1996 Charles M. Hannum. 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Charles M. Hannum. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * Copyright (c) 1994 Peter Galbavy * Copyright (c) 1995 Paul Kranenburg * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Peter Galbavy * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * Based on aic6360 by Jarle Greipsland * * Acknowledgements: Many of the algorithms used in this driver are * inspired by the work of Julian Elischer (julian@tfs.com) and * Charles Hannum (mycroft@duality.gnu.ai.mit.edu). Thanks a million! */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void espattach __P((struct device *, struct device *, void *)); int espmatch __P((struct device *, struct cfdata *, void *)); /* Linkup to the rest of the kernel */ struct cfattach esp_ca = { sizeof(struct esp_softc), espmatch, espattach }; struct cfdriver esp_cd = { NULL, "esp", DV_DULL }; struct scsipi_adapter esp_switch = { ncr53c9x_scsi_cmd, minphys, /* no max at this level; handled by DMA code */ NULL, NULL, }; struct scsipi_device esp_dev = { NULL, /* Use default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ }; /* * Functions and the switch for the MI code. */ u_char esp_read_reg __P((struct ncr53c9x_softc *, int)); void esp_write_reg __P((struct ncr53c9x_softc *, int, u_char)); int esp_dma_isintr __P((struct ncr53c9x_softc *)); void esp_dma_reset __P((struct ncr53c9x_softc *)); int esp_dma_intr __P((struct ncr53c9x_softc *)); int esp_dma_setup __P((struct ncr53c9x_softc *, caddr_t *, size_t *, int, size_t *)); void esp_dma_go __P((struct ncr53c9x_softc *)); void esp_dma_stop __P((struct ncr53c9x_softc *)); int esp_dma_isactive __P((struct ncr53c9x_softc *)); struct ncr53c9x_glue esp_glue = { esp_read_reg, esp_write_reg, esp_dma_isintr, esp_dma_reset, esp_dma_intr, esp_dma_setup, esp_dma_go, esp_dma_stop, esp_dma_isactive, NULL, /* gl_clear_latched_intr */ }; int espmatch(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { register struct confargs *ca = aux; register struct romaux *ra = &ca->ca_ra; if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) return (0); if (ca->ca_bustype == BUS_SBUS) return (1); ra->ra_len = NBPG; return (probeget(ra->ra_vaddr, 1) != -1); } /* * Attach this instance, and then all the sub-devices */ void espattach(parent, self, aux) struct device *parent, *self; void *aux; { register struct confargs *ca = aux; struct esp_softc *esc = (void *)self; struct ncr53c9x_softc *sc = &esc->sc_ncr53c9x; struct bootpath *bp; int dmachild = strncmp(parent->dv_xname, "dma", 3) == 0; /* * Set up glue for MI code early; we use some of it here. */ sc->sc_glue = &esp_glue; /* * Make sure things are sane. I don't know if this is ever * necessary, but it seem to be in all of Torek's code. */ if (ca->ca_ra.ra_nintr != 1) { printf(": expected 1 interrupt, got %d\n", ca->ca_ra.ra_nintr); return; } esc->sc_pri = ca->ca_ra.ra_intr[0].int_pri; printf(" pri %d", esc->sc_pri); /* * Map my registers in, if they aren't already in virtual * address space. */ if (ca->ca_ra.ra_vaddr) esc->sc_reg = (volatile u_char *) ca->ca_ra.ra_vaddr; else { esc->sc_reg = (volatile u_char *) mapiodev(ca->ca_ra.ra_reg, 0, ca->ca_ra.ra_len); } /* Other settings */ esc->sc_node = ca->ca_ra.ra_node; if (ca->ca_bustype == BUS_SBUS) { sc->sc_id = getpropint(esc->sc_node, "initiator-id", 7); sc->sc_freq = getpropint(esc->sc_node, "clock-frequency", -1); } else { sc->sc_id = 7; sc->sc_freq = 24000000; } if (sc->sc_freq < 0) sc->sc_freq = ((struct sbus_softc *) sc->sc_dev.dv_parent)->sc_clockfreq; /* gimme Mhz */ sc->sc_freq /= 1000000; if (dmachild) { esc->sc_dma = (struct dma_softc *)parent; esc->sc_dma->sc_esp = esc; } else { /* * find the DMA by poking around the dma device structures * * What happens here is that if the dma driver has not been * configured, then this returns a NULL pointer. Then when the * dma actually gets configured, it does the opposing test, and * if the sc->sc_esp field in it's softc is NULL, then tries to * find the matching esp driver. */ esc->sc_dma = (struct dma_softc *) getdevunit("dma", sc->sc_dev.dv_unit); /* * and a back pointer to us, for DMA */ if (esc->sc_dma) esc->sc_dma->sc_esp = esc; else { printf("\n"); panic("espattach: no dma found"); } } /* * 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... */ /* * It is necessary to try to load the 2nd config register here, * to find out what rev the esp chip is, else the ncr53c9x_reset * will not set up the defaults correctly. */ sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB; sc->sc_cfg2 = NCRCFG2_SCSI2 | NCRCFG2_RPE; sc->sc_cfg3 = NCRCFG3_CDB; NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2); if ((NCR_READ_REG(sc, NCR_CFG2) & ~NCRCFG2_RSVD) != (NCRCFG2_SCSI2 | NCRCFG2_RPE)) { sc->sc_rev = NCR_VARIANT_ESP100; } else { sc->sc_cfg2 = NCRCFG2_SCSI2; NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2); sc->sc_cfg3 = 0; NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3); sc->sc_cfg3 = (NCRCFG3_CDB | NCRCFG3_FCLK); NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3); if (NCR_READ_REG(sc, NCR_CFG3) != (NCRCFG3_CDB | NCRCFG3_FCLK)) { sc->sc_rev = NCR_VARIANT_ESP100A; } else { /* NCRCFG2_FE enables > 64K transfers */ sc->sc_cfg2 |= NCRCFG2_FE; sc->sc_cfg3 = 0; NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3); sc->sc_rev = NCR_VARIANT_ESP200; } } /* * 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; /* * Alas, we must now modify the value a bit, because it's * only valid when can switch on FASTCLK and FASTSCSI bits * in config register 3... */ switch (sc->sc_rev) { case NCR_VARIANT_ESP100: sc->sc_maxxfer = 64 * 1024; sc->sc_minsync = 0; /* No synch on old chip? */ break; case NCR_VARIANT_ESP100A: sc->sc_maxxfer = 64 * 1024; /* Min clocks/byte is 5 */ sc->sc_minsync = ncr53c9x_cpb2stp(sc, 5); break; case NCR_VARIANT_ESP200: sc->sc_maxxfer = 16 * 1024 * 1024; /* XXX - do actually set FAST* bits */ break; } /* add me to the sbus structures */ esc->sc_sd.sd_reset = (void *) ncr53c9x_reset; #if defined(SUN4C) || defined(SUN4M) if (ca->ca_bustype == BUS_SBUS) { if (dmachild) sbus_establish(&esc->sc_sd, sc->sc_dev.dv_parent); else sbus_establish(&esc->sc_sd, &sc->sc_dev); } #endif /* SUN4C || SUN4M */ /* and the interuppts */ esc->sc_ih.ih_fun = (void *) ncr53c9x_intr; esc->sc_ih.ih_arg = sc; intr_establish(esc->sc_pri, &esc->sc_ih); evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt); /* * If the boot path is "esp" at the moment and it's me, then * walk our pointer to the sub-device, ready for the config * below. */ bp = ca->ca_ra.ra_bp; switch (ca->ca_bustype) { case BUS_SBUS: if (bp != NULL && strcmp(bp->name, "esp") == 0 && SAME_ESP(sc, bp, ca)) bootpath_store(1, bp + 1); break; default: if (bp != NULL && strcmp(bp->name, "esp") == 0 && bp->val[0] == -1 && bp->val[1] == sc->sc_dev.dv_unit) bootpath_store(1, bp + 1); break; } /* Do the common parts of attachment. */ ncr53c9x_attach(sc, &esp_switch, &esp_dev); /* Turn on target selection using the `dma' method */ ncr53c9x_dmaselect = 1; bootpath_store(1, NULL); } /* * Glue functions. */ u_char esp_read_reg(sc, reg) struct ncr53c9x_softc *sc; int reg; { struct esp_softc *esc = (struct esp_softc *)sc; return (esc->sc_reg[reg * 4]); } void esp_write_reg(sc, reg, val) struct ncr53c9x_softc *sc; int reg; u_char val; { struct esp_softc *esc = (struct esp_softc *)sc; u_char v = val; esc->sc_reg[reg * 4] = v; } int esp_dma_isintr(sc) struct ncr53c9x_softc *sc; { struct esp_softc *esc = (struct esp_softc *)sc; return (DMA_ISINTR(esc->sc_dma)); } void esp_dma_reset(sc) struct ncr53c9x_softc *sc; { struct esp_softc *esc = (struct esp_softc *)sc; DMA_RESET(esc->sc_dma); } int esp_dma_intr(sc) struct ncr53c9x_softc *sc; { struct esp_softc *esc = (struct esp_softc *)sc; return (DMA_INTR(esc->sc_dma)); } int esp_dma_setup(sc, addr, len, datain, dmasize) struct ncr53c9x_softc *sc; caddr_t *addr; size_t *len; int datain; size_t *dmasize; { struct esp_softc *esc = (struct esp_softc *)sc; return (DMA_SETUP(esc->sc_dma, addr, len, datain, dmasize)); } void esp_dma_go(sc) struct ncr53c9x_softc *sc; { struct esp_softc *esc = (struct esp_softc *)sc; DMA_GO(esc->sc_dma); } void esp_dma_stop(sc) struct ncr53c9x_softc *sc; { struct esp_softc *esc = (struct esp_softc *)sc; DMACSR(esc->sc_dma) &= ~D_EN_DMA; } int esp_dma_isactive(sc) struct ncr53c9x_softc *sc; { struct esp_softc *esc = (struct esp_softc *)sc; return (DMA_ISACTIVE(esc->sc_dma)); }