/* $NetBSD: atppc_isa.c,v 1.17 2022/09/25 17:09:36 thorpej Exp $ */ /*- * Copyright (c) 2001 Alcove - Nicolas Souchu * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. * * FreeBSD: src/sys/isa/ppc.c,v 1.26.2.5 2001/10/02 05:21:45 nsouch Exp * */ #include __KERNEL_RCSID(0, "$NetBSD: atppc_isa.c,v 1.17 2022/09/25 17:09:36 thorpej Exp $"); #include "opt_atppc.h" #include #include #include #include #include #include #include #include #include #include #include #include /* * ISA bus attach code for atppc driver. * Note on capabilities: capabilities may exist in the chipset but may not * necessarily be useable. I.e. you may specify an IRQ in the autoconfig, but * will the port actually have an IRQ assigned to it at the hardware level? * How can you test if the capabilities can be used? For interrupts, see if a * handler exists (sc_intr != NULL). For DMA, see if the sc_dma_start() and * sc_dma_finish() function pointers are not NULL. */ /* Configuration data for atppc on isa bus. */ struct atppc_isa_softc { /* Machine independent device data */ struct atppc_softc sc_atppc; /* IRQ/DRQ/IO Port assignments on ISA bus */ int sc_irq; int sc_drq; int sc_iobase; /* ISA chipset tag */ isa_chipset_tag_t sc_ic; }; /* Probe and attach functions for a atppc device on the ISA bus. */ static int atppc_isa_probe(device_t, cfdata_t, void *); static void atppc_isa_attach(device_t, device_t, void *); static int atppc_isa_dma_start(struct atppc_softc *, void *, u_int, u_int8_t); static int atppc_isa_dma_finish(struct atppc_softc *); static int atppc_isa_dma_abort(struct atppc_softc *); static int atppc_isa_dma_malloc(device_t, void **, bus_addr_t *, bus_size_t); static void atppc_isa_dma_free(device_t, void **, bus_addr_t *, bus_size_t); CFATTACH_DECL_NEW(atppc_isa, sizeof(struct atppc_isa_softc), atppc_isa_probe, atppc_isa_attach, NULL, NULL); /* * Probe function: find parallel port controller on isa bus. Combined from * lpt_isa_probe() in lpt.c and atppc_detect_port() from FreeBSD's ppc.c. */ static int atppc_isa_probe(device_t parent, cfdata_t cf, void *aux) { bus_space_handle_t ioh; struct isa_attach_args *ia = aux; bus_space_tag_t iot = ia->ia_iot; int rval = 0; if (ia->ia_nio < 1) 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, IO_LPTSIZE, 0, &ioh)) return (0); if (atppc_detect_port(iot, ioh) == 0) rval = 1; bus_space_unmap(iot, ioh, IO_LPTSIZE); if (rval) { ia->ia_nio = 1; ia->ia_io[0].ir_size = IO_LPTSIZE; ia->ia_nirq = 1; ia->ia_ndrq = 1; ia->ia_niomem = 0; } return (rval); } /* Attach function: attach and configure parallel port controller on isa bus. */ static void atppc_isa_attach(device_t parent, device_t self, void *aux) { struct atppc_isa_softc *sc = device_private(self); struct atppc_softc *lsc = &sc->sc_atppc; struct isa_attach_args *ia = aux; printf(": AT Parallel Port\n"); lsc->sc_iot = ia->ia_iot; lsc->sc_dmat = ia->ia_dmat; lsc->sc_has = 0; sc->sc_ic = ia->ia_ic; sc->sc_iobase = ia->ia_io->ir_addr; if (bus_space_map(lsc->sc_iot, sc->sc_iobase, IO_LPTSIZE, 0, &lsc->sc_ioh) != 0) { aprint_error_dev(self, "attempt to map bus space failed, device not " "properly attached.\n"); lsc->sc_dev_ok = ATPPC_NOATTACH; return; } lsc->sc_dev = self; lsc->sc_dev_ok = ATPPC_ATTACHED; /* Assign interrupt handler */ if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_INTR) && ia->ia_irq->ir_irq != ISA_UNKNOWN_IRQ && ia->ia_nirq >= 1) { sc->sc_irq = ia->ia_irq[0].ir_irq; } else sc->sc_irq = -1; if (sc->sc_irq > 0) { /* Establish interrupt handler. */ lsc->sc_ieh = isa_intr_establish(sc->sc_ic, sc->sc_irq, IST_EDGE, IPL_TTY, atppcintr, lsc->sc_dev); lsc->sc_has |= ATPPC_HAS_INTR; } /* Configure DMA */ if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_DMA) && ia->ia_drq->ir_drq != ISA_UNKNOWN_DRQ && ia->ia_ndrq >= 1) sc->sc_drq = ia->ia_drq[0].ir_drq; else sc->sc_drq = -1; if (sc->sc_drq != -1 && atppc_isadma_setup(lsc, sc->sc_ic, sc->sc_drq) == 0) { lsc->sc_has |= ATPPC_HAS_DMA; /* setup DMA hooks */ lsc->sc_dma_start = atppc_isa_dma_start; lsc->sc_dma_finish = atppc_isa_dma_finish; lsc->sc_dma_abort = atppc_isa_dma_abort; lsc->sc_dma_malloc = atppc_isa_dma_malloc; lsc->sc_dma_free = atppc_isa_dma_free; } /* Run soft configuration attach */ atppc_sc_attach(lsc); return; } /* Start DMA operation over ISA bus */ static int atppc_isa_dma_start(struct atppc_softc *lsc, void *buf, u_int nbytes, u_int8_t mode) { struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc; return atppc_isadma_start(sc->sc_ic, sc->sc_drq, buf, nbytes, mode); } /* Stop DMA operation over ISA bus */ static int atppc_isa_dma_finish(struct atppc_softc *lsc) { struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc; return atppc_isadma_finish(sc->sc_ic, sc->sc_drq); } /* Abort DMA operation over ISA bus */ static int atppc_isa_dma_abort(struct atppc_softc *lsc) { struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc; return atppc_isadma_abort(sc->sc_ic, sc->sc_drq); } /* Allocate memory for DMA over ISA bus */ static int atppc_isa_dma_malloc(device_t dev, void **buf, bus_addr_t *bus_addr, bus_size_t size) { struct atppc_isa_softc *sc = device_private(dev); return atppc_isadma_malloc(sc->sc_ic, sc->sc_drq, buf, bus_addr, size); } /* Free memory allocated by atppc_isa_dma_malloc() */ static void atppc_isa_dma_free(device_t dev, void **buf, bus_addr_t *bus_addr, bus_size_t size) { struct atppc_isa_softc *sc = device_private(dev); return atppc_isadma_free(sc->sc_ic, sc->sc_drq, buf, bus_addr, size); }