239 lines
7.0 KiB
C
239 lines
7.0 KiB
C
/* $NetBSD: atppc_puc.c,v 1.2 2004/02/10 18:19:47 jdolecek Exp $ */
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/*-
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* Copyright (c) 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jaromir Dolecek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "opt_atppc.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: atppc_puc.c,v 1.2 2004/02/10 18:19:47 jdolecek Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/syslog.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/termios.h>
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#include <machine/bus.h>
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#include <uvm/uvm_extern.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pucvar.h>
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#include <dev/ic/atppcvar.h>
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static int atppc_puc_match(struct device *, struct cfdata *, void *);
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static void atppc_puc_attach(struct device *, struct device *, void *);
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struct atppc_puc_softc {
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/* Machine independent device data */
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struct atppc_softc sc_atppc;
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bus_dmamap_t sc_dmamap;
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};
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CFATTACH_DECL(atppc_puc, sizeof(struct atppc_puc_softc), atppc_puc_match,
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atppc_puc_attach, NULL, NULL);
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static int atppc_puc_dma_setup(struct atppc_puc_softc *);
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static int atppc_puc_dma_start(struct atppc_softc *, void *, u_int,
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u_int8_t);
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static int atppc_puc_dma_finish(struct atppc_softc *);
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static int atppc_puc_dma_abort(struct atppc_softc *);
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static int atppc_puc_dma_malloc(struct device *, caddr_t *, bus_addr_t *,
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bus_size_t);
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static void atppc_puc_dma_free(struct device *, caddr_t *, bus_addr_t *,
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bus_size_t);
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/*
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* atppc_acpi_match: autoconf(9) match routine
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*/
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static int
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atppc_puc_match(struct device *parent, struct cfdata *match, void *aux)
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{
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struct puc_attach_args *aa = aux;
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/*
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* Locators already matched, just check the type.
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*/
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if (aa->type != PUC_PORT_TYPE_LPT)
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return (0);
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return (1);
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}
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static void
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atppc_puc_attach(struct device *parent, struct device *self, void *aux)
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{
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struct atppc_softc *sc = (struct atppc_softc *) self;
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struct atppc_puc_softc *psc = (struct atppc_puc_softc *) self;
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struct puc_attach_args *aa = aux;
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const char *intrstr;
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sc->sc_dev_ok = ATPPC_NOATTACH;
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printf(": AT Parallel Port\n");
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/* Attach */
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sc->sc_iot = aa->t;
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sc->sc_ioh = aa->h;
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sc->sc_dmat = aa->dmat;
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sc->sc_has = 0;
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intrstr = pci_intr_string(aa->pc, aa->intrhandle);
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sc->sc_ieh = pci_intr_establish(aa->pc, aa->intrhandle, IPL_TTY,
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atppcintr, sc);
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if (sc->sc_ieh == NULL) {
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printf("%s: couldn't establish interrupt",
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sc->sc_dev.dv_xname);
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if (intrstr != NULL)
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printf(" at %s", intrstr);
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printf("\n");
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return;
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}
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printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
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sc->sc_has |= ATPPC_HAS_INTR;
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/* setup DMA hooks */
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if (atppc_puc_dma_setup(psc) == 0) {
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sc->sc_has |= ATPPC_HAS_DMA;
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sc->sc_dma_start = atppc_puc_dma_start;
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sc->sc_dma_finish = atppc_puc_dma_finish;
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sc->sc_dma_abort = atppc_puc_dma_abort;
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sc->sc_dma_malloc = atppc_puc_dma_malloc;
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sc->sc_dma_free = atppc_puc_dma_free;
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}
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/* Finished attach */
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sc->sc_dev_ok = ATPPC_ATTACHED;
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/* Run soft configuration attach */
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atppc_sc_attach(sc);
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}
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/* Setup DMA structures */
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static int
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atppc_puc_dma_setup(struct atppc_puc_softc *psc)
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{
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return EOPNOTSUPP; /* XXX DMA not tested yet */
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#if 0
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struct atppc_softc *sc = (struct atppc_softc *)psc;
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int error;
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#define BUFSIZE PAGE_SIZE /* XXX see lptvar.h */
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if ((error = bus_dmamap_create(sc->sc_dmat, BUFSIZE, 1, BUFSIZE, 0,
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BUS_DMA_NOWAIT, &psc->sc_dmamap)))
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return error;
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return (0);
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#endif
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}
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/* Start DMA operation over PCI bus */
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static int
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atppc_puc_dma_start(struct atppc_softc *dev, void *buf, u_int nbytes,
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u_int8_t mode)
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{
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struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
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struct atppc_softc *sc = &psc->sc_atppc;
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bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0, nbytes,
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(mode == ATPPC_DMA_MODE_WRITE) ? BUS_DMASYNC_PREWRITE
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: BUS_DMASYNC_PREREAD);
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return (0);
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}
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/* Stop DMA operation over PCI bus */
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static int
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atppc_puc_dma_finish(struct atppc_softc *dev)
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{
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struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
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struct atppc_softc *sc = &psc->sc_atppc;
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/*
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* We don't know direction of DMA, so sync both. We can safely
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* assume the dma map is loaded.
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*/
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bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0,
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psc->sc_dmamap->dm_segs[0].ds_len,
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BUS_DMASYNC_POSTWRITE|BUS_DMASYNC_POSTREAD);
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return (0);
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}
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/* Abort DMA operation over PCI bus */
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int
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atppc_puc_dma_abort(struct atppc_softc * lsc)
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{
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/* Nothing to do - we do not need to sync, op is aborted */
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return (0);
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}
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/* Allocate memory for DMA over PCI bus */
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int
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atppc_puc_dma_malloc(struct device *dev, caddr_t *buf, bus_addr_t *bus_addr,
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bus_size_t size)
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{
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struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
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struct atppc_softc *sc = &psc->sc_atppc;
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int error;
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error = bus_dmamap_load(sc->sc_dmat, psc->sc_dmamap, *buf, size,
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NULL /* kernel address */, BUS_DMA_WAITOK|BUS_DMA_STREAMING);
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if (error)
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return (error);
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*bus_addr = psc->sc_dmamap->dm_segs[0].ds_addr;
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return (0);
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}
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/* Free memory allocated by atppc_isa_dma_malloc() */
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void
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atppc_puc_dma_free(struct device *dev, caddr_t *buf, bus_addr_t *bus_addr,
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bus_size_t size)
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{
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struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
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struct atppc_softc *sc = &psc->sc_atppc;
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return (bus_dmamap_unload(sc->sc_dmat, psc->sc_dmamap));
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}
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