root/kern/dev/lamebus/lscreen_att.c

DEFINITIONS

1. attach_lscreen_to_lamebus

   1 /*
   2  * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
   3  *      The President and Fellows of Harvard College.
   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 University nor the names of its 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 UNIVERSITY 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 UNIVERSITY 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  */
  30 /*
  31  * Code for probe/attach of lscreen to LAMEbus.
  32  */
  33 #include <types.h>
  34 #include <lib.h>
  35 #include <lamebus/lamebus.h>
  36 #include <lamebus/lscreen.h>
  37 #include "autoconf.h"
  39 /* Lowest revision we support */
  40 #define LOW_VERSION   1
  41 /* Highest revision we support */
  42 #define HIGH_VERSION  1
  44 struct lscreen_softc *
  45 attach_lscreen_to_lamebus(int lscreenno, struct lamebus_softc *sc)
  46 {
  47         struct lscreen_softc *ls;
  48         int slot = lamebus_probe(sc, LB_VENDOR_CS161, LBCS161_SCREEN,
LOW_VERSION, HIGH_VERSION);
  50         if (slot < 0) {
  51                 /* Not found */
  52                 return NULL;
  53         }
ls = kmalloc(sizeof(struct lscreen_softc));
  56         if (ls==NULL) {
  57                 /* Out of memory */
  58                 return NULL;
  59         }
  61         /* Record what it's attached to */
ls->ls_busdata = sc;
ls->ls_buspos = slot;
  65         /* Mark the slot in use and hook the interrupt */
lamebus_mark(sc, slot);
lamebus_attach_interrupt(sc, slot, ls, lscreen_irq);
  69         return ls;
  70 }