LXR linux/arch/powerpc/platforms/pseries/event

   1/*
   2 * Copyright (C) 2001 Dave Engebretsen IBM Corporation
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; either version 2 of the License, or
   7 * (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17 */
  18
  19#include <asm/prom.h>
  20
  21#include "pseries.h"
  22
  23void request_event_sources_irqs(struct device_node *np,
  24                                irq_handler_t handler,
  25                                const char *name)
  26{
  27        int i, index, count = 0;
  28        struct of_irq oirq;
  29        const u32 *opicprop;
  30        unsigned int opicplen;
  31        unsigned int virqs[16];
  32
  33        /* Check for obsolete "open-pic-interrupt" property. If present, then
  34         * map those interrupts using the default interrupt host and default
  35         * trigger
  36         */
  37        opicprop = of_get_property(np, "open-pic-interrupt", &opicplen);
  38        if (opicprop) {
  39                opicplen /= sizeof(u32);
  40                for (i = 0; i < opicplen; i++) {
  41                        if (count > 15)
  42                                break;
  43                        virqs[count] = irq_create_mapping(NULL, *(opicprop++));
  44                        if (virqs[count] == NO_IRQ) {
  45                                pr_err("event-sources: Unable to allocate "
  46                                       "interrupt number for %s\n",
  47                                       np->full_name);
  48                                WARN_ON(1);
  49                        }
  50                        else
  51                                count++;
  52
  53                }
  54        }
  55        /* Else use normal interrupt tree parsing */
  56        else {
  57                /* First try to do a proper OF tree parsing */
  58                for (index = 0; of_irq_map_one(np, index, &oirq) == 0;
  59                     index++) {
  60                        if (count > 15)
  61                                break;
  62                        virqs[count] = irq_create_of_mapping(oirq.controller,
  63                                                            oirq.specifier,
  64                                                            oirq.size);
  65                        if (virqs[count] == NO_IRQ) {
  66                                pr_err("event-sources: Unable to allocate "
  67                                       "interrupt number for %s\n",
  68                                       np->full_name);
  69                                WARN_ON(1);
  70                        }
  71                        else
  72                                count++;
  73                }
  74        }
  75
  76        /* Now request them */
  77        for (i = 0; i < count; i++) {
  78                if (request_irq(virqs[i], handler, 0, name, NULL)) {
  79                        pr_err("event-sources: Unable to request interrupt "
  80                               "%d for %s\n", virqs[i], np->full_name);
  81                        WARN_ON(1);
  82                        return;
  83                }
  84        }
  85}
  86
  87