/* $NetBSD: uha_isa.c,v 1.41.12.1 2019/11/14 16:04:31 martin 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. * * 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: uha_isa.c,v 1.41.12.1 2019/11/14 16:04:31 martin Exp $"); #include "opt_ddb.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define UHA_ISA_IOSIZE 16 int uha_isa_probe(device_t, cfdata_t, void *); void uha_isa_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(uha_isa, sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach, NULL, NULL); #ifndef DDB #define Debugger() panic("should call debugger here (uha_isa.c)") #endif /* ! DDB */ int u14_find(bus_space_tag_t, bus_space_handle_t, struct uha_probe_data *); void u14_start_mbox(struct uha_softc *, struct uha_mscp *); int u14_poll(struct uha_softc *, struct scsipi_xfer *, int); int u14_intr(void *); void u14_init(struct uha_softc *); /* * Check the slots looking for a board we recognise * If we find one, note its address (slot) and call * the actual probe routine to check it out. */ int uha_isa_probe(device_t parent, cfdata_t match, void *aux) { struct isa_attach_args *ia = aux; bus_space_tag_t iot = ia->ia_iot; bus_space_handle_t ioh; struct uha_probe_data upd; int rv; if (ia->ia_nio < 1) return (0); if (ia->ia_nirq < 1) return (0); if (ia->ia_ndrq < 1) return (0); if (ISA_DIRECT_CONFIG(ia)) return (0); /* Disallow wildcarded i/o address. */ if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) return (0); if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) return (0); rv = u14_find(iot, ioh, &upd); bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); if (rv) { if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ && ia->ia_irq[0].ir_irq != upd.sc_irq) return (0); if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ && ia->ia_drq[0].ir_drq != upd.sc_drq) return (0); ia->ia_nio = 1; ia->ia_io[0].ir_size = UHA_ISA_IOSIZE; ia->ia_nirq = 1; ia->ia_irq[0].ir_irq = upd.sc_irq; ia->ia_ndrq = 1; ia->ia_drq[0].ir_drq = upd.sc_drq; ia->ia_niomem = 0; } return (rv); } /* * Attach all the sub-devices we can find */ void uha_isa_attach(device_t parent, device_t self, void *aux) { struct isa_attach_args *ia = aux; struct uha_softc *sc = device_private(self); bus_space_tag_t iot = ia->ia_iot; bus_dma_tag_t dmat = ia->ia_dmat; bus_space_handle_t ioh; struct uha_probe_data upd; isa_chipset_tag_t ic = ia->ia_ic; int error; sc->sc_dev = self; printf("\n"); if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) { aprint_error_dev(sc->sc_dev, "can't map i/o space\n"); return; } sc->sc_iot = iot; sc->sc_ioh = ioh; sc->sc_dmat = dmat; if (!u14_find(iot, ioh, &upd)) { aprint_error_dev(sc->sc_dev, "u14_find failed\n"); return; } if (upd.sc_drq != -1) { sc->sc_dmaflags = 0; if ((error = isa_dmacascade(ic, upd.sc_drq)) != 0) { aprint_error_dev(sc->sc_dev, "unable to cascade DRQ, error = %d\n", error); return; } } else { /* * We have a VLB controller, and can do 32-bit DMA. */ sc->sc_dmaflags = ISABUS_DMA_32BIT; } sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, u14_intr, sc); if (sc->sc_ih == NULL) { aprint_error_dev(sc->sc_dev, "couldn't establish interrupt\n"); return; } /* Save function pointers for later use. */ sc->start_mbox = u14_start_mbox; sc->poll = u14_poll; sc->init = u14_init; uha_attach(sc, &upd); } /* * Start the board, ready for normal operation */ int u14_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_probe_data *sc) { u_int16_t model, config; int irq, drq; int resetcount = 4000; /* 4 secs? */ model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); if ((model & 0xfff0) != 0x5640) return (0); config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | (bus_space_read_1(iot, 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; default: printf("u14_find: unknown model %x\n", model); return (0); } 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_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); while (--resetcount) { if (bus_space_read_1(iot, 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) { 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(struct uha_softc *sc, struct uha_mscp *mscp) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int spincount = 100000; /* 1s should be enough */ while (--spincount) { if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) break; delay(100); } if (!spincount) { aprint_error_dev(sc->sc_dev, "uha_start_mbox, board not responding\n"); Debugger(); } bus_space_write_4(iot, ioh, U14_OGMPTR, sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); if (mscp->flags & MSCP_ABORT) bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); else bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) callout_reset(&mscp->xs->xs_callout, mstohz(mscp->timeout), uha_timeout, mscp); } /* * Function to poll for command completion when in poll mode. * * wait = timeout in msec */ int u14_poll(struct uha_softc *sc, struct scsipi_xfer *xs, int count) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; while (count) { /* * If we had interrupts enabled, would we * have got an interrupt? */ if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) u14_intr(sc); if (xs->xs_status & XS_STS_DONE) return (0); delay(1000); count--; } return (1); } /* * Catch an interrupt from the adaptor */ int u14_intr(void *arg) { struct uha_softc *sc = arg; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; struct uha_mscp *mscp; u_char uhastat; u_long mboxval; #ifdef UHADEBUG printf("%s: uhaintr ", device_xname(sc->sc_dev)); #endif /*UHADEBUG */ if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) return (0); for (;;) { /* * First get all the information and then * acknowledge the interrupt */ uhastat = bus_space_read_1(iot, ioh, U14_SINT); mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); /* XXX Send an ABORT_ACK instead? */ bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); #ifdef UHADEBUG printf("status = 0x%x ", uhastat); #else __USE(uhastat); #endif /*UHADEBUG*/ /* * Process the completed operation */ mscp = uha_mscp_phys_kv(sc, mboxval); if (!mscp) { printf("%s: BAD MSCP RETURNED!\n", device_xname(sc->sc_dev)); continue; /* whatever it was, it'll timeout */ } callout_stop(&mscp->xs->xs_callout); uha_done(sc, mscp); if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) return (1); } } void u14_init(struct uha_softc *sc) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; /* make sure interrupts are enabled */ #ifdef UHADEBUG printf("u14_init: lmask=%02x, smask=%02x\n", bus_space_read_1(iot, ioh, U14_LMASK), bus_space_read_1(iot, ioh, U14_SMASK)); #endif bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ }