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 23 void 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