sys/dev/pci/atppc_puc.c

   1 /* $NetBSD: atppc_puc.c,v 1.10 2008/04/28 20:23:54 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2004 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jaromir Dolecek.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "opt_atppc.h"
  33
  34 #include <sys/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: atppc_puc.c,v 1.10 2008/04/28 20:23:54 martin Exp $");
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/errno.h>
  40 #include <sys/ioctl.h>
  41 #include <sys/syslog.h>
  42 #include <sys/device.h>
  43 #include <sys/proc.h>
  44 #include <sys/termios.h>
  45
  46 #include <sys/bus.h>
  47 #include <uvm/uvm_extern.h>
  48
  49 #include <dev/pci/pcivar.h>
  50 #include <dev/pci/pucvar.h>
  51
  52 #include <dev/ic/atppcvar.h>
  53
  54 static int      atppc_puc_match(device_t, cfdata_t, void *);
  55 static void     atppc_puc_attach(device_t, device_t, void *);
  56
  57 struct atppc_puc_softc {
  58         /* Machine independent device data */
  59         struct atppc_softc sc_atppc;
  60
  61         bus_dmamap_t sc_dmamap;
  62 };
  63
  64 CFATTACH_DECL_NEW(atppc_puc, sizeof(struct atppc_puc_softc), atppc_puc_match,
  65     atppc_puc_attach, NULL, NULL);
  66
  67 static int atppc_puc_dma_setup(struct atppc_puc_softc *);
  68 static int atppc_puc_dma_start(struct atppc_softc *, void *, u_int,
  69         u_int8_t);
  70 static int atppc_puc_dma_finish(struct atppc_softc *);
  71 static int atppc_puc_dma_abort(struct atppc_softc *);
  72 static int atppc_puc_dma_malloc(device_t, void **, bus_addr_t *,
  73         bus_size_t);
  74 static void atppc_puc_dma_free(device_t, void **, bus_addr_t *,
  75         bus_size_t);
  76
  77 /*
  78  * atppc_acpi_match: autoconf(9) match routine
  79  */
  80 static int
  81 atppc_puc_match(device_t parent, cfdata_t match, void *aux)
  82 {
  83         struct puc_attach_args *aa = aux;
  84
  85         /*
  86          * Locators already matched, just check the type.
  87          */
  88         if (aa->type != PUC_PORT_TYPE_LPT)
  89                 return (0);
  90
  91         return (1);
  92 }
  93
  94 static void
  95 atppc_puc_attach(device_t parent, device_t self, void *aux)
  96 {
  97         struct atppc_softc *sc = device_private(self);
  98         struct atppc_puc_softc *psc = device_private(self);
  99         struct puc_attach_args *aa = aux;
 100         const char *intrstr;
 101
 102         sc->sc_dev_ok = ATPPC_NOATTACH;
 103
 104         printf(": AT Parallel Port\n");
 105
 106         /* Attach */
 107         sc->sc_dev = self;
 108         sc->sc_iot = aa->t;
 109         sc->sc_ioh = aa->h;
 110         sc->sc_dmat = aa->dmat;
 111         sc->sc_has = 0;
 112
 113         intrstr = pci_intr_string(aa->pc, aa->intrhandle);
 114         sc->sc_ieh = pci_intr_establish(aa->pc, aa->intrhandle, IPL_TTY,
 115             atppcintr, sc);
 116         if (sc->sc_ieh == NULL) {
 117                 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt");
 118                 if (intrstr != NULL)
 119                         aprint_error(" at %s", intrstr);
 120                 aprint_error("\n");
 121                 return;
 122         }
 123         aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr);
 124         sc->sc_has |= ATPPC_HAS_INTR;
 125
 126         /* setup DMA hooks */
 127         if (atppc_puc_dma_setup(psc) == 0) {
 128                 sc->sc_has |= ATPPC_HAS_DMA;
 129                 sc->sc_dma_start = atppc_puc_dma_start;
 130                 sc->sc_dma_finish = atppc_puc_dma_finish;
 131                 sc->sc_dma_abort = atppc_puc_dma_abort;
 132                 sc->sc_dma_malloc = atppc_puc_dma_malloc;
 133                 sc->sc_dma_free = atppc_puc_dma_free;
 134         }
 135
 136         /* Finished attach */
 137         sc->sc_dev_ok = ATPPC_ATTACHED;
 138
 139         /* Run soft configuration attach */
 140         atppc_sc_attach(sc);
 141 }
 142
 143 /* Setup DMA structures */
 144 static int
 145 atppc_puc_dma_setup(struct atppc_puc_softc *psc)
 146 {
 147         return EOPNOTSUPP;      /* XXX DMA not tested yet */
 148 #if 0
 149         struct atppc_softc *sc = (struct atppc_softc *)psc;
 150         int error;
 151
 152 #define BUFSIZE PAGE_SIZE       /* XXX see lptvar.h */
 153         if ((error = bus_dmamap_create(sc->sc_dmat, BUFSIZE, 1, BUFSIZE, 0,
 154             BUS_DMA_NOWAIT, &psc->sc_dmamap)))
 155                 return error;
 156
 157         return (0);
 158 #endif
 159 }
 160
 161 /* Start DMA operation over PCI bus */
 162 static int
 163 atppc_puc_dma_start(struct atppc_softc *dev, void *buf, u_int nbytes,
 164         u_int8_t mode)
 165 {
 166         struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
 167         struct atppc_softc *sc = &psc->sc_atppc;
 168
 169         bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0, nbytes,
 170             (mode == ATPPC_DMA_MODE_WRITE) ? BUS_DMASYNC_PREWRITE
 171                         : BUS_DMASYNC_PREREAD);
 172
 173         return (0);
 174 }
 175
 176 /* Stop DMA operation over PCI bus */
 177 static int
 178 atppc_puc_dma_finish(struct atppc_softc *dev)
 179 {
 180
 181         struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev;
 182         struct atppc_softc *sc = &psc->sc_atppc;
 183
 184         /*
 185          * We don't know direction of DMA, so sync both. We can safely
 186          *  assume the dma map is loaded.
 187          */
 188         bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0,
 189             psc->sc_dmamap->dm_segs[0].ds_len,
 190             BUS_DMASYNC_POSTWRITE|BUS_DMASYNC_POSTREAD);
 191
 192         return (0);
 193 }
 194
 195 /* Abort DMA operation over PCI bus */
 196 int
 197 atppc_puc_dma_abort(struct atppc_softc * lsc)
 198 {
 199
 200         /* Nothing to do - we do not need to sync, op is aborted */
 201         return (0);
 202 }
 203
 204 /* Allocate memory for DMA over PCI bus */
 205 int
 206 atppc_puc_dma_malloc(device_t dev, void **buf, bus_addr_t *bus_addr,
 207         bus_size_t size)
 208 {
 209         struct atppc_puc_softc *psc = device_private(dev);
 210         struct atppc_softc *sc = &psc->sc_atppc;
 211         int error;
 212
 213         error = bus_dmamap_load(sc->sc_dmat, psc->sc_dmamap, *buf, size,
 214             NULL /* kernel address */, BUS_DMA_WAITOK|BUS_DMA_STREAMING);
 215         if (error)
 216                 return (error);
 217
 218         *bus_addr = psc->sc_dmamap->dm_segs[0].ds_addr;
 219         return (0);
 220 }
 221
 222 /* Free memory allocated by atppc_isa_dma_malloc() */
 223 void
 224 atppc_puc_dma_free(device_t dev, void **buf, bus_addr_t *bus_addr,
 225         bus_size_t size)
 226 {
 227         struct atppc_puc_softc *psc = device_private(dev);
 228         struct atppc_softc *sc = &psc->sc_atppc;
 229
 230         return (bus_dmamap_unload(sc->sc_dmat, psc->sc_dmamap));
 231 }