/* $NetBSD: uha_isa.c,v 1.2 1996/09/01 00:20:24 mycroft Exp $ */ /* * Copyright (c) 1994, 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define UHA_ISA_IOSIZE 16 int uha_isa_probe __P((struct device *, void *, void *)); void uha_isa_attach __P((struct device *, struct device *, void *)); struct cfattach uha_isa_ca = { sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach }; #define KVTOPHYS(x) vtophys(x) int u14_find __P((bus_chipset_tag_t, bus_io_handle_t, struct uha_softc *)); void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); int u14_poll __P((struct uha_softc *, struct scsi_xfer *, int)); int u14_intr __P((void *)); void u14_init __P((struct uha_softc *)); /* * Check the slots looking for a board we recognise * If we find one, note it's address (slot) and call * the actual probe routine to check it out. */ int uha_isa_probe(parent, match, aux) struct device *parent; void *match, *aux; { struct isa_attach_args *ia = aux; struct uha_softc sc; bus_chipset_tag_t bc = ia->ia_bc; bus_io_handle_t ioh; isa_chipset_tag_t ic = ia->ia_ic; int rv; if (bus_io_map(bc, ia->ia_iobase, UHA_ISA_IOSIZE, &ioh)) return (0); rv = u14_find(bc, ioh, &sc); bus_io_unmap(bc, ioh, UHA_ISA_IOSIZE); if (rv) { if (ia->ia_irq != -1 && ia->ia_irq != sc.sc_irq) return (0); if (ia->ia_drq != -1 && ia->ia_drq != sc.sc_drq) return (0); ia->ia_irq = sc.sc_irq; ia->ia_drq = sc.sc_drq; ia->ia_msize = 0; ia->ia_iosize = UHA_ISA_IOSIZE; } return (rv); } /* * Attach all the sub-devices we can find */ void uha_isa_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct isa_attach_args *ia = aux; struct uha_softc *sc = (void *)self; bus_chipset_tag_t bc = ia->ia_bc; bus_io_handle_t ioh; isa_chipset_tag_t ic = ia->ia_ic; printf("\n"); if (bus_io_map(bc, ia->ia_iobase, UHA_ISA_IOSIZE, &ioh)) panic("uha_attach: bus_io_map failed!"); sc->sc_bc = bc; sc->sc_ioh = ioh; if (!u14_find(bc, ioh, sc)) panic("uha_attach: u14_find failed!"); if (sc->sc_drq != -1) isa_dmacascade(sc->sc_drq); sc->sc_ih = isa_intr_establish(ic, sc->sc_irq, IST_EDGE, IPL_BIO, u14_intr, sc); if (sc->sc_ih == NULL) { printf("%s: couldn't establish interrupt\n", sc->sc_dev.dv_xname); return; } /* Save function pointers for later use. */ sc->start_mbox = u14_start_mbox; sc->poll = u14_poll; sc->init = u14_init; uha_attach(sc); } /* * Start the board, ready for normal operation */ int u14_find(bc, ioh, sc) bus_chipset_tag_t bc; bus_io_handle_t ioh; struct uha_softc *sc; { u_int16_t model, config; int irq, drq; int resetcount = 4000; /* 4 secs? */ model = (bus_io_read_1(bc, ioh, U14_ID + 0) << 8) | (bus_io_read_1(bc, ioh, U14_ID + 1) << 0); if ((model & 0xfff0) != 0x5640) return (0); config = (bus_io_read_1(bc, ioh, U14_CONFIG + 0) << 8) | (bus_io_read_1(bc, ioh, U14_CONFIG + 1) << 0); switch (model & 0x000f) { case 0x0000: switch (config & U14_DMA_MASK) { case U14_DMA_CH5: drq = 5; break; case U14_DMA_CH6: drq = 6; break; case U14_DMA_CH7: drq = 7; break; default: printf("u14_find: illegal drq setting %x\n", config & U14_DMA_MASK); return (0); } break; case 0x0001: /* This is a 34f, and doesn't need an ISA DMA channel. */ drq = -1; break; } switch (config & U14_IRQ_MASK) { case U14_IRQ10: irq = 10; break; case U14_IRQ11: irq = 11; break; case U14_IRQ14: irq = 14; break; case U14_IRQ15: irq = 15; break; default: printf("u14_find: illegal irq setting %x\n", config & U14_IRQ_MASK); return (0); } bus_io_write_1(bc, ioh, U14_LINT, UHA_ASRST); while (--resetcount) { if (bus_io_read_1(bc, ioh, U14_LINT)) break; delay(1000); /* 1 mSec per loop */ } if (!resetcount) { printf("u14_find: board timed out during reset\n"); return (0); } /* if we want to fill in softc, do so now */ if (sc != NULL) { sc->sc_irq = irq; sc->sc_drq = drq; sc->sc_scsi_dev = config & U14_HOSTID_MASK; } return (1); } /* * Function to send a command out through a mailbox */ void u14_start_mbox(sc, mscp) struct uha_softc *sc; struct uha_mscp *mscp; { bus_chipset_tag_t bc = sc->sc_bc; bus_io_handle_t ioh = sc->sc_ioh; int spincount = 100000; /* 1s should be enough */ while (--spincount) { if ((bus_io_read_1(bc, ioh, U14_LINT) & U14_LDIP) == 0) break; delay(100); } if (!spincount) { printf("%s: uha_start_mbox, board not responding\n", sc->sc_dev.dv_xname); Debugger(); } bus_io_write_4(bc, ioh, U14_OGMPTR, KVTOPHYS(mscp)); if (mscp->flags & MSCP_ABORT) bus_io_write_1(bc, ioh, U14_LINT, U14_ABORT); else bus_io_write_1(bc, ioh, U14_LINT, U14_OGMFULL); if ((mscp->xs->flags & SCSI_POLL) == 0) timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000); } /* * Function to poll for command completion when in poll mode. * * wait = timeout in msec */ int u14_poll(sc, xs, count) struct uha_softc *sc; struct scsi_xfer *xs; int count; { bus_chipset_tag_t bc = sc->sc_bc; bus_io_handle_t ioh = sc->sc_ioh; while (count) { /* * If we had interrupts enabled, would we * have got an interrupt? */ if (bus_io_read_1(bc, ioh, U14_SINT) & U14_SDIP) u14_intr(sc); if (xs->flags & ITSDONE) return (0); delay(1000); count--; } return (1); } /* * Catch an interrupt from the adaptor */ int u14_intr(arg) void *arg; { struct uha_softc *sc = arg; bus_chipset_tag_t bc = sc->sc_bc; bus_io_handle_t ioh = sc->sc_ioh; struct uha_mscp *mscp; u_char uhastat; u_long mboxval; #ifdef UHADEBUG printf("%s: uhaintr ", sc->sc_dev.dv_xname); #endif /*UHADEBUG */ if ((bus_io_read_1(bc, ioh, U14_SINT) & U14_SDIP) == 0) return (0); for (;;) { /* * First get all the information and then * acknowledge the interrupt */ uhastat = bus_io_read_1(bc, ioh, U14_SINT); mboxval = bus_io_read_4(bc, ioh, U14_ICMPTR); /* XXX Send an ABORT_ACK instead? */ bus_io_write_1(bc, ioh, U14_SINT, U14_ICM_ACK); #ifdef UHADEBUG printf("status = 0x%x ", uhastat); #endif /*UHADEBUG*/ /* * Process the completed operation */ mscp = uha_mscp_phys_kv(sc, mboxval); if (!mscp) { printf("%s: BAD MSCP RETURNED!\n", sc->sc_dev.dv_xname); continue; /* whatever it was, it'll timeout */ } untimeout(uha_timeout, mscp); uha_done(sc, mscp); if ((bus_io_read_1(bc, ioh, U14_SINT) & U14_SDIP) == 0) return (1); } } void u14_init(sc) struct uha_softc *sc; { bus_chipset_tag_t bc = sc->sc_bc; bus_io_handle_t ioh = sc->sc_ioh; /* make sure interrupts are enabled */ #ifdef UHADEBUG printf("u14_init: lmask=%02x, smask=%02x\n", bus_io_read_1(bc, ioh, U14_LMASK), bus_io_read_1(bc, ioh, U14_SMASK)); #endif bus_io_write_1(bc, ioh, U14_LMASK, 0xd1); /* XXX */ bus_io_write_1(bc, ioh, U14_SMASK, 0x91); /* XXX */ }