ppbus_conf.c

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    1 /* $NetBSD: ppbus_conf.c,v 1.16 2008/04/29 14:07:37 cegger 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 1.16 2008/04/29 14:07:37 cegger Exp $");
   34 
   35 #include "opt_ppbus.h"
   36 #include "opt_ppbus_1284.h"
   37 
   38 #include "gpio.h"
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/kernel.h>
   43 #include <sys/device.h>
   44 #include <sys/proc.h>
   45 
   46 #include <dev/ppbus/ppbus_1284.h>
   47 #include <dev/ppbus/ppbus_base.h>
   48 #include <dev/ppbus/ppbus_conf.h>
   49 #include <dev/ppbus/ppbus_device.h>
   50 #include <dev/ppbus/ppbus_var.h>
   51 
   52 /* Probe, attach, and detach functions for ppbus. */
   53 static int ppbus_probe(device_t, cfdata_t, void *);
   54 static void ppbus_attach(device_t, device_t, void *);
   55 static int ppbus_detach(device_t, int);
   56 
   57 /* Utility function prototypes */
   58 static int ppbus_search_children(device_t, cfdata_t,
   59                                  const int *, void *);
   60 
   61 
   62 CFATTACH_DECL_NEW(ppbus, sizeof(struct ppbus_softc), ppbus_probe, ppbus_attach,
   63         ppbus_detach, NULL);
   64 
   65 /* Probe function for ppbus. */
   66 static int
   67 ppbus_probe(device_t parent, cfdata_t cf, void *aux)
   68 {
   69         struct parport_adapter *sc_link = aux;
   70 
   71         /* Check adapter for consistency */
   72         if (
   73                 /* Required methods for all parports */
   74                 sc_link->parport_io == NULL ||
   75                 sc_link->parport_exec_microseq == NULL ||
   76                 sc_link->parport_setmode == NULL ||
   77                 sc_link->parport_getmode == NULL ||
   78                 sc_link->parport_read == NULL ||
   79                 sc_link->parport_write == NULL ||
   80                 sc_link->parport_read_ivar == NULL ||
   81                 sc_link->parport_write_ivar == NULL ||
   82                 /* Methods which conditional exist based on capabilities */
   83                 ((sc_link->capabilities & PPBUS_HAS_EPP) &&
   84                 (sc_link->parport_reset_epp_timeout == NULL)) ||
   85                 ((sc_link->capabilities & PPBUS_HAS_ECP) &&
   86                 (sc_link->parport_ecp_sync == NULL)) ||
   87                 ((sc_link->capabilities & PPBUS_HAS_DMA) &&
   88                 (sc_link->parport_dma_malloc == NULL ||
   89                 sc_link->parport_dma_free == NULL)) ||
   90                 ((sc_link->capabilities & PPBUS_HAS_INTR) &&
   91                 (sc_link->parport_add_handler == NULL ||
   92                 sc_link->parport_remove_handler == NULL))
   93                 ) {
   94 
   95 #ifdef PPBUS_DEBUG
   96                 printf("%s(%s): parport_adaptor is incomplete. Child device "
   97                         "probe failed.\n", __func__, device_xname(parent));
   98 #endif
   99                 return 0;
  100         } else {
  101                 return 1;
  102         }
  103 }
  104 
  105 /* Attach function for ppbus. */
  106 static void
  107 ppbus_attach(device_t parent, device_t self, void *aux)
  108 {
  109         struct ppbus_softc *ppbus = device_private(self);
  110         struct parport_adapter *sc_link = aux;
  111         struct ppbus_attach_args args;
  112 
  113         printf("\n");
  114 
  115         /* Initialize config data from adapter (bus + device methods) */
  116         ppbus->sc_dev = self;
  117         args.capabilities = ppbus->sc_capabilities = sc_link->capabilities;
  118         ppbus->ppbus_io = sc_link->parport_io;
  119         ppbus->ppbus_exec_microseq = sc_link->parport_exec_microseq;
  120         ppbus->ppbus_reset_epp_timeout = sc_link->
  121                 parport_reset_epp_timeout;
  122         ppbus->ppbus_setmode = sc_link->parport_setmode;
  123         ppbus->ppbus_getmode = sc_link->parport_getmode;
  124         ppbus->ppbus_ecp_sync = sc_link->parport_ecp_sync;
  125         ppbus->ppbus_read = sc_link->parport_read;
  126         ppbus->ppbus_write = sc_link->parport_write;
  127         ppbus->ppbus_read_ivar = sc_link->parport_read_ivar;
  128         ppbus->ppbus_write_ivar = sc_link->parport_write_ivar;
  129         ppbus->ppbus_dma_malloc = sc_link->parport_dma_malloc;
  130         ppbus->ppbus_dma_free = sc_link->parport_dma_free;
  131         ppbus->ppbus_add_handler = sc_link->parport_add_handler;
  132         ppbus->ppbus_remove_handler = sc_link->parport_remove_handler;
  133 
  134         /* Initially there is no device owning the bus */
  135         ppbus->ppbus_owner = NULL;
  136 
  137         /* Initialize locking structures */
  138         mutex_init(&(ppbus->sc_lock), MUTEX_DEFAULT, IPL_NONE);
  139 
  140         /* Set up bus mode and ieee state */
  141         ppbus->sc_mode = ppbus->ppbus_getmode(device_parent(self));
  142         ppbus->sc_use_ieee = 1;
  143         ppbus->sc_1284_state = PPBUS_FORWARD_IDLE;
  144         ppbus->sc_1284_error = PPBUS_NO_ERROR;
  145 
  146         /* Record device's sucessful attachment */
  147         ppbus->sc_dev_ok = PPBUS_OK;
  148 
  149 #ifndef DONTPROBE_1284
  150         /* detect IEEE1284 compliant devices */
  151         if (ppbus_scan_bus(self)) {
  152                 printf("%s: No IEEE1284 device found.\n", device_xname(self));
  153         } else {
  154                 printf("%s: IEEE1284 device found.\n", device_xname(self));
  155                 /*
  156                  * Detect device ID (interrupts must be disabled because we
  157                  * cannot do a ltsleep() to wait for it - no context)
  158                  */
  159                 if (args.capabilities & PPBUS_HAS_INTR) {
  160                         int val = 0;
  161                         if(ppbus_write_ivar(self, PPBUS_IVAR_INTR, &val) != 0) {
  162                                 printf(" <problem initializing interrupt "
  163                                         "usage>");
  164                         }
  165                 }
  166                 ppbus_pnp_detect(self);
  167         }
  168 #endif /* !DONTPROBE_1284 */
  169 
  170         /* Configure child devices */
  171         SLIST_INIT(&(ppbus->sc_childlist_head));
  172         config_search_ia(ppbus_search_children, self, "ppbus", &args);
  173 
  174 #if NGPIO > 0
  175         gpio_ppbus_attach(ppbus);
  176 #endif
  177         return;
  178 }
  179 
  180 /* Detach function for ppbus. */
  181 static int
  182 ppbus_detach(device_t self, int flag)
  183 {
  184         struct ppbus_softc * ppbus = device_private(self);
  185         struct ppbus_device_softc * child;
  186 
  187         if (ppbus->sc_dev_ok != PPBUS_OK) {
  188                 if (!(flag & DETACH_QUIET))
  189                         printf("%s: detach called on unattached device.\n",
  190                                 device_xname(ppbus->sc_dev));
  191                 if (!(flag & DETACH_FORCE))
  192                         return 0;
  193                 if (!(flag & DETACH_QUIET))
  194                         printf("%s: continuing detach (DETACH_FORCE).\n",
  195                                 device_xname(ppbus->sc_dev));
  196         }
  197 
  198         mutex_destroy(&(ppbus->sc_lock));
  199 
  200         /* Detach children devices */
  201         while (!SLIST_EMPTY(&(ppbus->sc_childlist_head))) {
  202                 child = SLIST_FIRST(&(ppbus->sc_childlist_head));
  203                 config_deactivate(child->sc_dev);
  204                 if (config_detach(child->sc_dev, flag)) {
  205                         if(!(flag & DETACH_QUIET))
  206                                 aprint_error_dev(ppbus->sc_dev, "error detaching %s.",
  207                                         device_xname(child->sc_dev));
  208                         if(!(flag & DETACH_FORCE))
  209                                 return 0;
  210                         if(!(flag & DETACH_QUIET))
  211                                 printf("%s: continuing (DETACH_FORCE).\n",
  212                                         device_xname(ppbus->sc_dev));
  213                 }
  214                 SLIST_REMOVE_HEAD(&(ppbus->sc_childlist_head), entries);
  215         }
  216 
  217         if (!(flag & DETACH_QUIET))
  218                 printf("%s: detached.\n", device_xname(ppbus->sc_dev));
  219 
  220         return 1;
  221 }
  222 
  223 /* Search for children device and add to list */
  224 static int
  225 ppbus_search_children(device_t parent, cfdata_t cf,
  226                       const int *ldesc, void *aux)
  227 {
  228         struct ppbus_softc *ppbus = device_private(parent);
  229         struct ppbus_device_softc *child;
  230         int rval = 0;
  231 
  232         if (config_match(parent, cf, aux) > 0) {
  233                 child = (struct ppbus_device_softc *) config_attach(parent,
  234                         cf, aux, NULL);
  235                 if (child) {
  236                         SLIST_INSERT_HEAD(&(ppbus->sc_childlist_head), child,
  237                                 entries);
  238                         rval = 1;
  239                 }
  240         }
  241 
  242         return rval;
  243 }
  244

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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