1/* 2 * arch/arm/mach-ixp4xx/gtwx5715-pci.c 3 * 4 * Gemtek GTWX5715 (Linksys WRV54G) board setup 5 * 6 * Copyright (C) 2004 George T. Joseph 7 * Derived from Coyote 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 2 12 * of the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 22 * 23 */ 24 25#include <linux/pci.h> 26#include <linux/init.h> 27#include <linux/delay.h> 28#include <asm/mach-types.h> 29#include <asm/hardware.h> 30#include <asm/irq.h> 31#include <asm/arch/gtwx5715.h> 32#include <asm/mach/pci.h> 33 34extern void ixp4xx_pci_preinit(void); 35extern int ixp4xx_setup(int nr, struct pci_sys_data *sys); 36extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys); 37 38 39/* 40 * The exact GPIO pins and IRQs are defined in arch-ixp4xx/gtwx5715.h 41 * Slot 0 isn't actually populated with a card connector but 42 * we initialize it anyway in case a future version has the 43 * slot populated or someone with good soldering skills has 44 * some free time. 45 */ 46void __init gtwx5715_pci_preinit(void) 47{ 48 set_irq_type(GTWX5715_PCI_SLOT0_INTA_IRQ, IRQT_LOW); 49 set_irq_type(GTWX5715_PCI_SLOT0_INTB_IRQ, IRQT_LOW); 50 set_irq_type(GTWX5715_PCI_SLOT1_INTA_IRQ, IRQT_LOW); 51 set_irq_type(GTWX5715_PCI_SLOT1_INTB_IRQ, IRQT_LOW); 52 53 ixp4xx_pci_preinit(); 54} 55 56 57static int __init gtwx5715_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 58{ 59 int rc; 60 static int gtwx5715_irqmap 61 [GTWX5715_PCI_SLOT_COUNT] 62 [GTWX5715_PCI_INT_PIN_COUNT] = { 63 {GTWX5715_PCI_SLOT0_INTA_IRQ, GTWX5715_PCI_SLOT0_INTB_IRQ}, 64 {GTWX5715_PCI_SLOT1_INTA_IRQ, GTWX5715_PCI_SLOT1_INTB_IRQ}, 65}; 66 67 if (slot >= GTWX5715_PCI_SLOT_COUNT || 68 pin >= GTWX5715_PCI_INT_PIN_COUNT) rc = -1; 69 else 70 rc = gtwx5715_irqmap[slot][pin-1]; 71 72 printk("%s: Mapped slot %d pin %d to IRQ %d\n", __FUNCTION__,slot, pin, rc); 73 return(rc); 74} 75 76struct hw_pci gtwx5715_pci __initdata = { 77 .nr_controllers = 1, 78 .preinit = gtwx5715_pci_preinit, 79 .swizzle = pci_std_swizzle, 80 .setup = ixp4xx_setup, 81 .scan = ixp4xx_scan_bus, 82 .map_irq = gtwx5715_map_irq, 83}; 84 85int __init gtwx5715_pci_init(void) 86{ 87 if (machine_is_gtwx5715()) 88 { 89 pci_common_init(>wx5715_pci); 90 } 91 92 return 0; 93} 94 95subsys_initcall(gtwx5715_pci_init); 96