1 /* 2 * Toshiba rbtx4938 pci routines 3 * Copyright (C) 2000-2001 Toshiba Corporation 4 * 5 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the 6 * terms of the GNU General Public License version 2. This program is 7 * licensed "as is" without any warranty of any kind, whether express 8 * or implied. 9 * 10 * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) 11 */ 12 #include <linux/types.h> 13 #include <asm/txx9/pci.h> 14 #include <asm/txx9/rbtx4938.h> 15 rbtx4938_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)16int rbtx4938_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) 17 { 18 int irq = tx4938_pcic1_map_irq(dev, slot); 19 20 if (irq >= 0) 21 return irq; 22 irq = pin; 23 /* IRQ rotation */ 24 irq--; /* 0-3 */ 25 if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) { 26 /* PCI CardSlot (IDSEL=A23) */ 27 /* PCIA => PCIA (IDSEL=A23) */ 28 irq = (irq + 0 + slot) % 4; 29 } else { 30 /* PCI Backplane */ 31 if (txx9_pci_option & TXX9_PCI_OPT_PICMG) 32 irq = (irq + 33 - slot) % 4; 33 else 34 irq = (irq + 3 + slot) % 4; 35 } 36 irq++; /* 1-4 */ 37 38 switch (irq) { 39 case 1: 40 irq = RBTX4938_IRQ_IOC_PCIA; 41 break; 42 case 2: 43 irq = RBTX4938_IRQ_IOC_PCIB; 44 break; 45 case 3: 46 irq = RBTX4938_IRQ_IOC_PCIC; 47 break; 48 case 4: 49 irq = RBTX4938_IRQ_IOC_PCID; 50 break; 51 } 52 return irq; 53 } 54