bsp/drv/dev/base/init.c

Prex Home / Browse Source - Prex Version: 0.9.0
/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
driver_probe
driver_init
driver_shutdown
driver_dump
   1 /*-
   2  * Copyright (c) 2005-2009, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 
  30 /*
  31  * init.c - driver initialization routine
  32  */
  33 
  34 #include <driver.h>
  35 #include <cons.h>
  36 #include <dki.h>
  37 #include <kd.h>
  38 #include <conf/drvtab.h>
  39 
  40 #ifdef DEBUG
  41 #define DPRINTF(a) printf a
  42 #else
  43 #define DPRINTF(a)
  44 #endif
  45 
  46 #define NDRIVERS        (int)(sizeof(driver_table) / sizeof(driver_table[0]))
  47 
  48 
  49 /*
  50  * Call xxx_probe routine for all drivers.
  51  */
  52 void
  53 driver_probe(void)
  54 {
  55         struct driver *dp;
  56         int i;
  57 
  58         DPRINTF(("Probing devices...\n"));
  59 
  60         for (i = 0; i < NDRIVERS; i++) {
  61                 dp = driver_table[i];
  62                 ASSERT(dp != NULL);
  63 
  64                 if (dp->probe != NULL) {
  65                         if (dp->probe(dp) == 0)
  66                                 dp->flags |= DS_ALIVE;
  67                 } else {
  68                         /*
  69                          * No probe method. Mark it alive.
  70                          */
  71                         dp->flags |= DS_ALIVE;
  72                 }
  73         }
  74 }
  75 
  76 /*
  77  * Call xxx_init routine for all living drivers.
  78  */
  79 void
  80 driver_init(void)
  81 {
  82         struct driver *dp;
  83         int i;
  84 
  85         for (i = 0; i < NDRIVERS; i++) {
  86                 dp = driver_table[i];
  87 
  88                 /* All drivers must have init method */
  89                 ASSERT(dp->init != NULL);
  90 
  91                 if (dp->flags & DS_ALIVE) {
  92                         DPRINTF(("Initializing %s\n", dp->name));
  93                         if (dp->init(dp) == 0)
  94                                 dp->flags |= DS_ACTIVE;
  95                 }
  96         }
  97 }
  98 
  99 /*
 100  * Call xxx_unload routine for all active drivers.
 101  */
 102 void
 103 driver_shutdown(void)
 104 {
 105         struct driver *dp;
 106         int i;
 107 
 108         DPRINTF(("Shutting down...\n"));
 109         for (i = NDRIVERS - 1; i >= 0; i--) {
 110                 dp = driver_table[i];
 111                 if (dp == NULL)
 112                         break;
 113                 /*
 114                  * Process only active drivers.
 115                  */
 116                 if (dp->flags & DS_ACTIVE) {
 117                         DPRINTF(("Unloading %s\n", dp->name));
 118                         if (dp->unload != NULL)
 119                                 dp->unload(dp);
 120                 }
 121         }
 122 }
 123 
 124 #if defined(DEBUG) && defined(CONFIG_KD)
 125 void
 126 driver_dump(void)
 127 {
 128         struct driver *dp;
 129         int i = 0;
 130 
 131         printf("Driver table:\n");
 132         printf(" probe    init     unload   devops   flags    name\n");
 133         printf(" -------- -------- -------- -------- -------- -----------\n");
 134 
 135         for (i = 0; i < NDRIVERS; i++) {
 136                 dp = driver_table[i];
 137                 printf(" %08lx %08lx %08lx %08lx %08lx %s\n",
 138                        (long)dp->probe, (long)dp->init, (long)dp->unload,
 139                        (long)dp->devops,(long) dp->flags, dp->name);
 140         }
 141 }
 142 #endif
/* [<][>][^][v][top][bottom][index][help] */
root/bsp/drv/dev/base/init.c

DEFINITIONS
