ppbus_conf.c

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    1 /* $NetBSD: ppbus_conf.c,v 1.7 2005/02/27 00:27:44 perry Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 1997, 1998, 1999 Nicolas Souchu
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * FreeBSD: src/sys/dev/ppbus/ppbconf.c,v 1.17.2.1 2000/05/24 00:20:57 n_hibma Exp
   29  *
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __KERNEL_RCSID(0, "$NetBSD: ppbus_conf.c,v 1.7 2005/02/27 00:27:44 perry Exp $");
   34 
   35 #include "opt_ppbus.h"
   36 #include "opt_ppbus_1284.h"
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/kernel.h>
   41 #include <sys/device.h>
   42 #include <sys/proc.h>
   43 
   44 #include <dev/ppbus/ppbus_1284.h>
   45 #include <dev/ppbus/ppbus_base.h>
   46 #include <dev/ppbus/ppbus_conf.h>
   47 #include <dev/ppbus/ppbus_device.h>
   48 #include <dev/ppbus/ppbus_var.h>
   49 
   50 /* Probe, attach, and detach functions for ppbus. */
   51 static int ppbus_probe(struct device *, struct cfdata *, void *);
   52 static void ppbus_attach(struct device *, struct device *, void *);
   53 static int ppbus_detach(struct device *, int);
   54 
   55 /* Utility function prototypes */
   56 static int ppbus_search_children(struct device *, struct cfdata *,
   57                                  const locdesc_t *, void *);
   58 
   59 
   60 CFATTACH_DECL(ppbus, sizeof(struct ppbus_softc), ppbus_probe, ppbus_attach,
   61         ppbus_detach, NULL);
   62 
   63 /* Probe function for ppbus. */
   64 static int
   65 ppbus_probe(struct device *parent, struct cfdata *cf, void *aux)
   66 {
   67         struct parport_adapter *sc_link = aux;
   68 
   69         /* Check adapter for consistency */
   70         if (
   71                 /* Required methods for all parports */
   72                 sc_link->parport_io == NULL ||
   73                 sc_link->parport_exec_microseq == NULL ||
   74                 sc_link->parport_setmode == NULL ||
   75                 sc_link->parport_getmode == NULL ||
   76                 sc_link->parport_read == NULL ||
   77                 sc_link->parport_write == NULL ||
   78                 sc_link->parport_read_ivar == NULL ||
   79                 sc_link->parport_write_ivar == NULL ||
   80                 /* Methods which conditional exist based on capabilities */
   81                 ((sc_link->capabilities & PPBUS_HAS_EPP) &&
   82                 (sc_link->parport_reset_epp_timeout == NULL)) ||
   83                 ((sc_link->capabilities & PPBUS_HAS_ECP) &&
   84                 (sc_link->parport_ecp_sync == NULL)) ||
   85                 ((sc_link->capabilities & PPBUS_HAS_DMA) &&
   86                 (sc_link->parport_dma_malloc == NULL ||
   87                 sc_link->parport_dma_free == NULL)) ||
   88                 ((sc_link->capabilities & PPBUS_HAS_INTR) &&
   89                 (sc_link->parport_add_handler == NULL ||
   90                 sc_link->parport_remove_handler == NULL))
   91                 ) {
   92 
   93 #ifdef PPBUS_DEBUG
   94                 printf("%s(%s): parport_adaptor is incomplete. Child device "
   95                         "probe failed.\n", __func__, parent->dv_xname);
   96 #endif
   97                 return 0;
   98         } else {
   99                 return 1;
  100         }
  101 }
  102 
  103 /* Attach function for ppbus. */
  104 static void
  105 ppbus_attach(struct device *parent, struct device *self, void *aux)
  106 {
  107         struct ppbus_softc *ppbus = (struct ppbus_softc *)self;
  108         struct parport_adapter *sc_link = aux;
  109         struct ppbus_attach_args args;
  110 
  111         printf("\n");
  112 
  113         /* Initialize config data from adapter (bus + device methods) */
  114         args.capabilities = ppbus->sc_capabilities = sc_link->capabilities;
  115         ppbus->ppbus_io = sc_link->parport_io;
  116         ppbus->ppbus_exec_microseq = sc_link->parport_exec_microseq;
  117         ppbus->ppbus_reset_epp_timeout = sc_link->
  118                 parport_reset_epp_timeout;
  119         ppbus->ppbus_setmode = sc_link->parport_setmode;
  120         ppbus->ppbus_getmode = sc_link->parport_getmode;
  121         ppbus->ppbus_ecp_sync = sc_link->parport_ecp_sync;
  122         ppbus->ppbus_read = sc_link->parport_read;
  123         ppbus->ppbus_write = sc_link->parport_write;
  124         ppbus->ppbus_read_ivar = sc_link->parport_read_ivar;
  125         ppbus->ppbus_write_ivar = sc_link->parport_write_ivar;
  126         ppbus->ppbus_dma_malloc = sc_link->parport_dma_malloc;
  127         ppbus->ppbus_dma_free = sc_link->parport_dma_free;
  128         ppbus->ppbus_add_handler = sc_link->parport_add_handler;
  129         ppbus->ppbus_remove_handler = sc_link->parport_remove_handler;
  130 
  131         /* Initially there is no device owning the bus */
  132         ppbus->ppbus_owner = NULL;
  133 
  134         /* Initialize locking structures */
  135         lockinit(&(ppbus->sc_lock), PPBUSPRI | PCATCH, "ppbuslock", 0,
  136                 LK_NOWAIT);
  137 
  138         /* Set up bus mode and ieee state */
  139         ppbus->sc_mode = ppbus->ppbus_getmode(self->dv_parent);
  140         ppbus->sc_use_ieee = 1;
  141         ppbus->sc_1284_state = PPBUS_FORWARD_IDLE;
  142         ppbus->sc_1284_error = PPBUS_NO_ERROR;
  143 
  144         /* Record device's sucessful attachment */
  145         ppbus->sc_dev_ok = PPBUS_OK;
  146 
  147 #ifndef DONTPROBE_1284
  148         /* detect IEEE1284 compliant devices */
  149         if (ppbus_scan_bus(self)) {
  150                 printf("%s: No IEEE1284 device found.\n", self->dv_xname);
  151         } else {
  152                 printf("%s: IEEE1284 device found.\n", self->dv_xname);
  153                 /*
  154                  * Detect device ID (interrupts must be disabled because we
  155                  * cannot do a ltsleep() to wait for it - no context)
  156                  */
  157                 if (args.capabilities & PPBUS_HAS_INTR) {
  158                         int val = 0;
  159                         if(ppbus_write_ivar(self, PPBUS_IVAR_INTR, &val) != 0) {
  160                                 printf(" <problem initializing interrupt "
  161                                         "usage>");
  162                         }
  163                 }
  164                 ppbus_pnp_detect(self);
  165         }
  166 #endif /* !DONTPROBE_1284 */
  167 
  168         /* Configure child devices */
  169         SLIST_INIT(&(ppbus->sc_childlist_head));
  170         config_search_ia(ppbus_search_children, self, "ppbus", &args);
  171 
  172         return;
  173 }
  174 
  175 /* Detach function for ppbus. */
  176 static int
  177 ppbus_detach(struct device *self, int flag)
  178 {
  179         struct ppbus_softc * ppbus = (struct ppbus_softc *) self;
  180         struct ppbus_device_softc * child;
  181 
  182         if (ppbus->sc_dev_ok != PPBUS_OK) {
  183                 if (!(flag & DETACH_QUIET))
  184                         printf("%s: detach called on unattached device.\n",
  185                                 ppbus->sc_dev.dv_xname);
  186                 if (!(flag & DETACH_FORCE))
  187                         return 0;
  188                 if (!(flag & DETACH_QUIET))
  189                         printf("%s: continuing detach (DETACH_FORCE).\n",
  190                                 ppbus->sc_dev.dv_xname);
  191         }
  192 
  193         if (lockmgr(&(ppbus->sc_lock), LK_DRAIN, NULL)) {
  194                 if (!(flag & DETACH_QUIET))
  195                         printf("%s: error while waiting for lock activity to "
  196                                 "end.\n", ppbus->sc_dev.dv_xname);
  197                 if (!(flag & DETACH_FORCE))
  198                         return 0;
  199                 if (!(flag & DETACH_QUIET))
  200                         printf("%s: continuing detach (DETACH_FORCE).\n",
  201                                 ppbus->sc_dev.dv_xname);
  202         }
  203 
  204         /* Detach children devices */
  205         while (!SLIST_EMPTY(&(ppbus->sc_childlist_head))) {
  206                 child = SLIST_FIRST(&(ppbus->sc_childlist_head));
  207                 config_deactivate((struct device *)child);
  208                 if (config_detach((struct device *)child, flag)) {
  209                         if(!(flag & DETACH_QUIET))
  210                                 printf("%s: error detaching %s.",
  211                                         ppbus->sc_dev.dv_xname,
  212                                         child->sc_dev.dv_xname);
  213                         if(!(flag & DETACH_FORCE))
  214                                 return 0;
  215                         if(!(flag & DETACH_QUIET))
  216                                 printf("%s: continuing (DETACH_FORCE).\n",
  217                                         ppbus->sc_dev.dv_xname);
  218                 }
  219                 SLIST_REMOVE_HEAD(&(ppbus->sc_childlist_head), entries);
  220         }
  221 
  222         if (!(flag & DETACH_QUIET))
  223                 printf("%s: detached.\n", ppbus->sc_dev.dv_xname);
  224 
  225         return 1;
  226 }
  227 
  228 /* Search for children device and add to list */
  229 static int
  230 ppbus_search_children(struct device *parent, struct cfdata *cf,
  231                       const locdesc_t *ldesc, void *aux)
  232 {
  233         struct ppbus_softc *ppbus = (struct ppbus_softc *)parent;
  234         struct ppbus_device_softc *child;
  235         int rval = 0;
  236 
  237         if (config_match(parent, cf, aux) > 0) {
  238                 child = (struct ppbus_device_softc *) config_attach(parent,
  239                         cf, aux, NULL);
  240                 if (child) {
  241                         SLIST_INSERT_HEAD(&(ppbus->sc_childlist_head), child,
  242                                 entries);
  243                         rval = 1;
  244                 }
  245         }
  246 
  247         return rval;
  248 }
  249
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FreeBSD/Linux Kernel Cross Reference sys/dev/ppbus/ppbus_conf.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ppbus/ppbus_conf.c
