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atppc_puc.c revision 1.6.16.1
      1  1.6.16.1       mjf /* $NetBSD: atppc_puc.c,v 1.6.16.1 2008/06/02 13:23:37 mjf Exp $ */
      2       1.1  jdolecek 
      3       1.1  jdolecek /*-
      4       1.1  jdolecek  * Copyright (c) 2004 The NetBSD Foundation, Inc.
      5       1.1  jdolecek  * All rights reserved.
      6       1.1  jdolecek  *
      7       1.1  jdolecek  * This code is derived from software contributed to The NetBSD Foundation
      8       1.1  jdolecek  * by Jaromir Dolecek.
      9       1.1  jdolecek  *
     10       1.1  jdolecek  * Redistribution and use in source and binary forms, with or without
     11       1.1  jdolecek  * modification, are permitted provided that the following conditions
     12       1.1  jdolecek  * are met:
     13       1.1  jdolecek  * 1. Redistributions of source code must retain the above copyright
     14       1.1  jdolecek  *    notice, this list of conditions and the following disclaimer.
     15       1.1  jdolecek  * 2. Redistributions in binary form must reproduce the above copyright
     16       1.1  jdolecek  *    notice, this list of conditions and the following disclaimer in the
     17       1.1  jdolecek  *    documentation and/or other materials provided with the distribution.
     18       1.1  jdolecek  *
     19       1.1  jdolecek  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20       1.1  jdolecek  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21       1.1  jdolecek  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22       1.1  jdolecek  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23       1.1  jdolecek  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24       1.1  jdolecek  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25       1.1  jdolecek  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26       1.1  jdolecek  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27       1.1  jdolecek  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28       1.1  jdolecek  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29       1.1  jdolecek  * POSSIBILITY OF SUCH DAMAGE.
     30       1.1  jdolecek  */
     31       1.1  jdolecek 
     32       1.1  jdolecek #include "opt_atppc.h"
     33       1.1  jdolecek 
     34       1.1  jdolecek #include <sys/cdefs.h>
     35  1.6.16.1       mjf __KERNEL_RCSID(0, "$NetBSD: atppc_puc.c,v 1.6.16.1 2008/06/02 13:23:37 mjf Exp $");
     36       1.1  jdolecek 
     37       1.1  jdolecek #include <sys/param.h>
     38       1.1  jdolecek #include <sys/systm.h>
     39       1.1  jdolecek #include <sys/errno.h>
     40       1.1  jdolecek #include <sys/ioctl.h>
     41       1.1  jdolecek #include <sys/syslog.h>
     42       1.1  jdolecek #include <sys/device.h>
     43       1.1  jdolecek #include <sys/proc.h>
     44       1.1  jdolecek #include <sys/termios.h>
     45       1.1  jdolecek 
     46       1.6        ad #include <sys/bus.h>
     47       1.2  jdolecek #include <uvm/uvm_extern.h>
     48       1.1  jdolecek 
     49       1.1  jdolecek #include <dev/pci/pcivar.h>
     50       1.1  jdolecek #include <dev/pci/pucvar.h>
     51       1.1  jdolecek 
     52       1.1  jdolecek #include <dev/ic/atppcvar.h>
     53       1.1  jdolecek 
     54  1.6.16.1       mjf static int	atppc_puc_match(device_t, cfdata_t, void *);
     55  1.6.16.1       mjf static void	atppc_puc_attach(device_t, device_t, void *);
     56       1.1  jdolecek 
     57       1.2  jdolecek struct atppc_puc_softc {
     58       1.2  jdolecek 	/* Machine independent device data */
     59       1.2  jdolecek 	struct atppc_softc sc_atppc;
     60       1.2  jdolecek 
     61       1.2  jdolecek 	bus_dmamap_t sc_dmamap;
     62       1.2  jdolecek };
     63       1.3     perry 
     64  1.6.16.1       mjf CFATTACH_DECL_NEW(atppc_puc, sizeof(struct atppc_puc_softc), atppc_puc_match,
     65       1.1  jdolecek     atppc_puc_attach, NULL, NULL);
     66       1.1  jdolecek 
     67       1.2  jdolecek static int atppc_puc_dma_setup(struct atppc_puc_softc *);
     68       1.3     perry static int atppc_puc_dma_start(struct atppc_softc *, void *, u_int,
     69       1.1  jdolecek 	u_int8_t);
     70       1.1  jdolecek static int atppc_puc_dma_finish(struct atppc_softc *);
     71       1.1  jdolecek static int atppc_puc_dma_abort(struct atppc_softc *);
     72  1.6.16.1       mjf static int atppc_puc_dma_malloc(device_t, void **, bus_addr_t *,
     73       1.1  jdolecek 	bus_size_t);
     74  1.6.16.1       mjf static void atppc_puc_dma_free(device_t, void **, bus_addr_t *,
     75       1.1  jdolecek 	bus_size_t);
     76       1.1  jdolecek 
     77       1.1  jdolecek /*
     78       1.1  jdolecek  * atppc_acpi_match: autoconf(9) match routine
     79       1.1  jdolecek  */
     80       1.1  jdolecek static int
     81  1.6.16.1       mjf atppc_puc_match(device_t parent, cfdata_t match, void *aux)
     82       1.1  jdolecek {
     83       1.1  jdolecek 	struct puc_attach_args *aa = aux;
     84       1.1  jdolecek 
     85       1.1  jdolecek 	/*
     86       1.1  jdolecek 	 * Locators already matched, just check the type.
     87       1.1  jdolecek 	 */
     88       1.1  jdolecek 	if (aa->type != PUC_PORT_TYPE_LPT)
     89       1.1  jdolecek 		return (0);
     90       1.1  jdolecek 
     91       1.1  jdolecek 	return (1);
     92       1.1  jdolecek }
     93       1.1  jdolecek 
     94       1.1  jdolecek static void
     95  1.6.16.1       mjf atppc_puc_attach(device_t parent, device_t self, void *aux)
     96       1.1  jdolecek {
     97  1.6.16.1       mjf 	struct atppc_softc *sc = device_private(self);
     98  1.6.16.1       mjf 	struct atppc_puc_softc *psc = device_private(self);
     99       1.1  jdolecek 	struct puc_attach_args *aa = aux;
    100       1.1  jdolecek 	const char *intrstr;
    101       1.1  jdolecek 
    102       1.1  jdolecek 	sc->sc_dev_ok = ATPPC_NOATTACH;
    103       1.1  jdolecek 
    104       1.1  jdolecek 	printf(": AT Parallel Port\n");
    105       1.1  jdolecek 
    106       1.1  jdolecek 	/* Attach */
    107  1.6.16.1       mjf 	sc->sc_dev = self;
    108       1.1  jdolecek 	sc->sc_iot = aa->t;
    109       1.1  jdolecek 	sc->sc_ioh = aa->h;
    110       1.1  jdolecek 	sc->sc_dmat = aa->dmat;
    111       1.1  jdolecek 	sc->sc_has = 0;
    112       1.1  jdolecek 
    113       1.1  jdolecek 	intrstr = pci_intr_string(aa->pc, aa->intrhandle);
    114       1.1  jdolecek 	sc->sc_ieh = pci_intr_establish(aa->pc, aa->intrhandle, IPL_TTY,
    115       1.1  jdolecek 	    atppcintr, sc);
    116       1.1  jdolecek 	if (sc->sc_ieh == NULL) {
    117  1.6.16.1       mjf 		aprint_error_dev(sc->sc_dev, "couldn't establish interrupt");
    118       1.1  jdolecek 		if (intrstr != NULL)
    119       1.1  jdolecek 			printf(" at %s", intrstr);
    120       1.1  jdolecek 		printf("\n");
    121       1.1  jdolecek 		return;
    122       1.1  jdolecek 	}
    123  1.6.16.1       mjf 	printf("%s: interrupting at %s\n", device_xname(sc->sc_dev), intrstr);
    124       1.1  jdolecek 	sc->sc_has |= ATPPC_HAS_INTR;
    125       1.1  jdolecek 
    126       1.1  jdolecek 	/* setup DMA hooks */
    127       1.2  jdolecek 	if (atppc_puc_dma_setup(psc) == 0) {
    128       1.2  jdolecek 		sc->sc_has |= ATPPC_HAS_DMA;
    129       1.2  jdolecek 		sc->sc_dma_start = atppc_puc_dma_start;
    130       1.2  jdolecek 		sc->sc_dma_finish = atppc_puc_dma_finish;
    131       1.2  jdolecek 		sc->sc_dma_abort = atppc_puc_dma_abort;
    132       1.2  jdolecek 		sc->sc_dma_malloc = atppc_puc_dma_malloc;
    133       1.2  jdolecek 		sc->sc_dma_free = atppc_puc_dma_free;
    134       1.2  jdolecek 	}
    135       1.1  jdolecek 
    136       1.1  jdolecek 	/* Finished attach */
    137       1.1  jdolecek 	sc->sc_dev_ok = ATPPC_ATTACHED;
    138       1.1  jdolecek 
    139       1.1  jdolecek 	/* Run soft configuration attach */
    140       1.1  jdolecek 	atppc_sc_attach(sc);
    141       1.1  jdolecek }
    142       1.1  jdolecek 
    143       1.2  jdolecek /* Setup DMA structures */
    144       1.2  jdolecek static int
    145       1.2  jdolecek atppc_puc_dma_setup(struct atppc_puc_softc *psc)
    146       1.2  jdolecek {
    147       1.2  jdolecek 	return EOPNOTSUPP;	/* XXX DMA not tested yet */
    148       1.2  jdolecek #if 0
    149       1.2  jdolecek 	struct atppc_softc *sc = (struct atppc_softc *)psc;
    150       1.2  jdolecek 	int error;
    151       1.2  jdolecek 
    152       1.2  jdolecek #define BUFSIZE	PAGE_SIZE	/* XXX see lptvar.h */
    153       1.2  jdolecek 	if ((error = bus_dmamap_create(sc->sc_dmat, BUFSIZE, 1, BUFSIZE, 0,
    154       1.2  jdolecek 	    BUS_DMA_NOWAIT, &psc->sc_dmamap)))
    155       1.2  jdolecek 		return error;
    156       1.3     perry 
    157       1.2  jdolecek 	return (0);
    158       1.2  jdolecek #endif
    159       1.2  jdolecek }
    160       1.2  jdolecek 
    161       1.1  jdolecek /* Start DMA operation over PCI bus */
    162       1.3     perry static int
    163       1.2  jdolecek atppc_puc_dma_start(struct atppc_softc *dev, void *buf, u_int nbytes,
    164       1.1  jdolecek 	u_int8_t mode)
    165       1.1  jdolecek {
    166       1.2  jdolecek 	struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
    167       1.2  jdolecek 	struct atppc_softc *sc = &psc->sc_atppc;
    168       1.2  jdolecek 
    169       1.2  jdolecek 	bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0, nbytes,
    170       1.2  jdolecek 	    (mode == ATPPC_DMA_MODE_WRITE) ? BUS_DMASYNC_PREWRITE
    171       1.2  jdolecek 			: BUS_DMASYNC_PREREAD);
    172       1.1  jdolecek 
    173       1.1  jdolecek 	return (0);
    174       1.1  jdolecek }
    175       1.1  jdolecek 
    176       1.1  jdolecek /* Stop DMA operation over PCI bus */
    177       1.3     perry static int
    178       1.2  jdolecek atppc_puc_dma_finish(struct atppc_softc *dev)
    179       1.1  jdolecek {
    180       1.1  jdolecek 
    181       1.2  jdolecek 	struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
    182       1.2  jdolecek 	struct atppc_softc *sc = &psc->sc_atppc;
    183       1.2  jdolecek 
    184       1.2  jdolecek 	/*
    185       1.2  jdolecek 	 * We don't know direction of DMA, so sync both. We can safely
    186       1.2  jdolecek 	 *  assume the dma map is loaded.
    187       1.2  jdolecek 	 */
    188       1.2  jdolecek 	bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0,
    189       1.2  jdolecek 	    psc->sc_dmamap->dm_segs[0].ds_len,
    190       1.2  jdolecek 	    BUS_DMASYNC_POSTWRITE|BUS_DMASYNC_POSTREAD);
    191       1.2  jdolecek 
    192       1.1  jdolecek 	return (0);
    193       1.1  jdolecek }
    194       1.1  jdolecek 
    195       1.1  jdolecek /* Abort DMA operation over PCI bus */
    196       1.3     perry int
    197       1.1  jdolecek atppc_puc_dma_abort(struct atppc_softc * lsc)
    198       1.1  jdolecek {
    199       1.1  jdolecek 
    200       1.2  jdolecek 	/* Nothing to do - we do not need to sync, op is aborted */
    201       1.1  jdolecek 	return (0);
    202       1.1  jdolecek }
    203       1.1  jdolecek 
    204       1.3     perry /* Allocate memory for DMA over PCI bus */
    205       1.1  jdolecek int
    206  1.6.16.1       mjf atppc_puc_dma_malloc(device_t dev, void **buf, bus_addr_t *bus_addr,
    207       1.1  jdolecek 	bus_size_t size)
    208       1.1  jdolecek {
    209  1.6.16.1       mjf 	struct atppc_puc_softc *psc = device_private(dev);
    210       1.2  jdolecek 	struct atppc_softc *sc = &psc->sc_atppc;
    211       1.2  jdolecek 	int error;
    212       1.2  jdolecek 
    213       1.2  jdolecek 	error = bus_dmamap_load(sc->sc_dmat, psc->sc_dmamap, *buf, size,
    214       1.2  jdolecek 	    NULL /* kernel address */, BUS_DMA_WAITOK|BUS_DMA_STREAMING);
    215       1.2  jdolecek 	if (error)
    216       1.2  jdolecek 		return (error);
    217       1.1  jdolecek 
    218       1.2  jdolecek 	*bus_addr = psc->sc_dmamap->dm_segs[0].ds_addr;
    219       1.2  jdolecek 	return (0);
    220       1.1  jdolecek }
    221       1.1  jdolecek 
    222       1.3     perry /* Free memory allocated by atppc_isa_dma_malloc() */
    223       1.3     perry void
    224  1.6.16.1       mjf atppc_puc_dma_free(device_t dev, void **buf, bus_addr_t *bus_addr,
    225       1.1  jdolecek 	bus_size_t size)
    226       1.1  jdolecek {
    227  1.6.16.1       mjf 	struct atppc_puc_softc *psc = device_private(dev);
    228       1.2  jdolecek 	struct atppc_softc *sc = &psc->sc_atppc;
    229       1.1  jdolecek 
    230       1.2  jdolecek 	return (bus_dmamap_unload(sc->sc_dmat, psc->sc_dmamap));
    231       1.1  jdolecek }
    232